CN111244946B - Method and device for regulating and controlling power generation and utilization resources of self-contained power plant - Google Patents

Method and device for regulating and controlling power generation and utilization resources of self-contained power plant Download PDF

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CN111244946B
CN111244946B CN202010098270.6A CN202010098270A CN111244946B CN 111244946 B CN111244946 B CN 111244946B CN 202010098270 A CN202010098270 A CN 202010098270A CN 111244946 B CN111244946 B CN 111244946B
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self
power plant
contained power
energy consumption
contained
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CN111244946A (en
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杨梓俊
李小荣
孙勇
于芮技
宋杰
邵军军
郑红娟
纪程
黄怡凡
高赐威
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State Grid Corp of China SGCC
Southeast University
State Grid Jiangsu Electric Power Co Ltd
NARI Group Corp
Nari Technology Co Ltd
NARI Nanjing Control System Co Ltd
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State Grid Corp of China SGCC
Southeast University
State Grid Jiangsu Electric Power Co Ltd
NARI Group Corp
Nari Technology Co Ltd
NARI Nanjing Control System Co Ltd
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    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J3/00—Circuit arrangements for ac mains or ac distribution networks
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J3/00—Circuit arrangements for ac mains or ac distribution networks
    • H02J3/28—Arrangements for balancing of the load in a network by storage of energy
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J3/00—Circuit arrangements for ac mains or ac distribution networks
    • H02J3/38—Arrangements for parallely feeding a single network by two or more generators, converters or transformers
    • H02J3/46—Controlling of the sharing of output between the generators, converters, or transformers

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Abstract

The invention discloses a method and a device for regulating and controlling power generation and utilization resources of a self-contained power plant. The invention comprehensively considers the adjustable power generation and utilization resources of the self-contained power plant, including the generator, the adjustable load and the energy storage device, and the three are equivalent to be integrally involved in demand response, thereby fully exploiting the demand response potential of the self-contained power plant and remarkably lightening the peak regulation burden of the power grid.

Description

Method and device for regulating and controlling power generation and utilization resources of self-contained power plant
Technical Field
The invention belongs to the technical field of power systems and automation thereof, and particularly relates to a method and a device for regulating and controlling power generation and utilization resources of a self-contained power plant.
Background
The self-contained power plant refers to a power plant which is built by enterprises to meet the self power consumption demand. The self-contained power plant generates power according to the criterion of meeting the production requirement of the unit, and partial power is purchased from the power grid when the self-contained power plant is not enough. In contrast, utility power plants, i.e., power plants that provide electricity to the public, are known. The existing self-contained power plant management mode and means cannot meet the relevant requirements on the self-contained power plant standard management and flexible participation in trading under new situations, and a method with operability is provided by further technically exploring the function realization of the self-contained power plant in the fields of participation in demand response peak regulation, new energy consumption and the like under a new market environment. Meanwhile, the enterprise self-contained power plant can promote the comprehensive utilization efficiency of the overall resources of the society, and the installed power plant in the operation range of the state network company can reach over 9000 ten thousand kilowatts, so that the resource is an important resource for improving the operation flexibility of the power grid. Therefore, the self-contained power plant is a demand response resource with huge regulation potential, and due to the particularity of power generation and power utilization integration, the regulation and control method suitable for the conventional power plant and the conventional load is not suitable for the self-contained power plant, so that the regulation and control method for the power generation and power utilization resources of the self-contained power plant needs to be provided.
Disclosure of Invention
In order to solve the technical problems mentioned in the background art, the invention provides a method and a device for regulating and controlling power generation and utilization resources of a self-contained power plant, each power generation and utilization resource of the self-contained power plant is equivalent to a whole under the condition of considering the constraint of each technical condition, and corresponding regulation and control schemes are provided for different requirements of a power grid.
In order to achieve the technical purpose, the technical scheme of the invention is as follows: a method for regulating and controlling power generation and utilization resources of a self-contained power plant comprises the following steps:
the method comprises the steps of obtaining a unit regulation energy consumption model of the self-contained power plant, a total response model of the self-contained power plant and the total response times of the self-contained power plant through a pre-constructed regulation energy consumption model and response model of the self-contained power plant generator set output, a regulation energy consumption model and response model of the enterprise power utilization side adjustable load and a regulation energy consumption model and response model of the energy storage device, and solving an optimal power generation and utilization resource regulation strategy by taking the minimum power generation and utilization resource regulation energy consumption, the shortest response time and the minimum response times of the self-contained power plant as optimization targets.
Further, the energy consumption adjusting model for the output of the power generation unit of the self-contained power plant is as follows:
Figure GDA0002451069240000021
CG[i]＝Czi+Cri+Cwi
Czi＝C0
Figure GDA0002451069240000022
Cwi＝KwipGit
Figure GDA0002451069240000023
wherein: CG is the total output of the self-contained power plant generator set to regulate energy consumption, CG i]Adjusting energy consumption, x, for the output of a self-contained power plant generator set iiFor the operating state of the generator i of the self-contained power plant, pGitIs the power of the self-provided power plant generator set i output, gammaiRegulating energy consumption per unit output, CziEnergy consumption for initial construction of self-contained power plant generator set i, C0Representing initial construction energy consumption, CriFor the unit operating energy consumption of the self-contained power plant generator unit i, ai、bi、ciIs the energy consumption coefficient of the self-contained power plant generator set i, CwiEnergy consumption for operation and maintenance of self-contained power plant generator set i, KwiThe operation maintenance coefficient of the self-contained power plant generator set i is obtained;
the constraints are as follows:
the unit output force when adjusted upwards is expressed as follows:
pGi(t+1)-pGit≤URi
the set output down adjustment is expressed as follows:
pGit-pGi(t+1)≤DRi
constraint of maximum and minimum output of the unit:
Figure GDA0002451069240000031
wherein: URiFor the maximum upward climbing speed of the self-contained power plant generator set i, DRiFor the self-contained power plant generator set i maximum downward climbing speed, pGitThe output of the self-contained power plant generator set i at the moment t, pGi(t+1)The output of the self-contained power plant generator set i at the moment t +1,
Figure GDA0002451069240000032
the minimum output of the self-contained power plant generator set i at the moment t,
Figure GDA0002451069240000033
the maximum output of the self-contained power plant generator set i at the moment t;
the demand response time model of the generator set of the self-contained power plant is as follows:
Figure GDA0002451069240000034
Figure GDA0002451069240000035
DRi≤Ri≤URi
in the above formula, the first and second carbon atoms are,
Figure GDA0002451069240000036
is the output limit, R, of the generator set iiFor the ramp rate, τ, of the generator set iiIs the response time of the genset i.
Further, the energy consumption adjusting model of the adjustable load at the power utilization side of the enterprise is as follows:
Figure GDA0002451069240000037
CL[j]＝kjtμt(pj(t+1)-pjt)2·Δtj
Figure GDA0002451069240000038
Figure GDA0002451069240000039
wherein: j is the number of the controllable load, j is 1,2 …, m is the total number of the controllable load, CL [ j]For the regulated energy consumption, p, of the controllable load j due to process regulation and equipment operating state fluctuationjtThe capacity of the controllable load j at time t, pj(t+1)Adjusted capacity, gamma, for the controllable load j at time t +1jFor regulating the energy consumption, k, per unit power of the controllable loadjtFor the proportion of the load involved in the regulation at time t, μtIf the load running time is advanced when the controllable load participates in regulation for the time influence factor
Figure GDA0002451069240000041
Describing the lead time of the controllable load j, and defining if the load running time is shifted
Figure GDA0002451069240000042
Describing the lag time of a controllable load j，ΔtjAdjusting the time span, TS, for a controllable load jjFor the load to start the working time, TEjEnding the working time for the controllable load j, wherein T represents a time period;
the response model of the adjustable load is:
Figure GDA0002451069240000043
wherein: k is the number of the electric devices in the controllable load j, k is 1,2, …, p, p is the total number of the electric devices, and τ isjIn order to be able to control the response time of the load,
Figure GDA0002451069240000044
for the demand response time of the kth consumer in the controllable load j,
Figure GDA0002451069240000045
the demand response time of the p-th electric equipment in the controllable load j.
Further, the energy consumption adjusting model of the energy storage device is as follows:
Figure GDA0002451069240000046
wherein p issFor the magnitude of the power of the energy storage device, gammasFor regulating energy consumption, k, per unit of stored energy powersFor the depreciation factor, gamma, of the energy storage devicepCoefficient of power consumption gammacIn order to obtain the capacity energy consumption coefficient,
Figure GDA0002451069240000047
is the upper limit of the energy storage capacity;
and (3) constraint of the capacity of the energy storage device:
Figure GDA0002451069240000048
wherein the content of the first and second substances,
Figure GDA0002451069240000049
the maximum power of the energy storage device;
the response time model of the energy storage device is:
Figure GDA0002451069240000051
wherein, tausFor the response time of the energy storage device, τqThe response time of the q-th response is n.
Further, the self-contained power plant unit adjusts the energy consumption model gammaTComprises the following steps:
Figure GDA0002451069240000052
wherein:
Figure GDA0002451069240000053
respectively in the states of the generator set before adjustment and the controllable load switch,
Figure GDA0002451069240000054
respectively the regulated generator set and the controllable load switch state PTIn order to comprehensively consider the unit output, the electrical load and the equivalent load of the self-contained power plant obtained by the energy storage device,
Figure GDA0002451069240000055
in order to adjust the charging and discharging power of the pre-stored energy,
Figure GDA0002451069240000056
charge and discharge power, p, for regulated energy storagejtThe capacity of the controllable load j at the time t;
total response time model τ for self-contained power plantsTComprises the following steps:
Figure GDA0002451069240000057
wherein:
Figure GDA0002451069240000058
in order to adjust the on-off state of the front energy storage device,
Figure GDA0002451069240000059
the on-off state of the energy storage device is adjusted;
total number of responses J of self-contained power plantnum：
Figure GDA00024510692400000510
The self-contained power plant adjusts the energy consumption CT to be:
Figure GDA00024510692400000511
further, with the optimization objectives of minimum energy consumption, shortest response time and minimum response times for adjusting the power generation and utilization resources of the self-contained power plant, an optimal power generation and utilization resource regulation strategy is solved, and the method specifically comprises the following steps:
Figure GDA0002451069240000061
Figure GDA0002451069240000062
Figure GDA0002451069240000063
the constraints are as follows:
Figure GDA0002451069240000064
Figure GDA0002451069240000065
pGi(t+1)-pGit≤URi
pGit-pGi(t+1)≤DRi
DRi≤Ri≤URi
Figure GDA0002451069240000066
and solving to obtain an optimal power generation and utilization resource adjustment strategy of the self-contained power plant according to the given objective function and constraint conditions.
A regulation and control device for power generation and utilization resources of a self-contained power plant comprises:
the system comprises a self-contained power plant unit adjusting energy consumption model, a total response model and a total response time calculating module, wherein the self-contained power plant unit adjusting energy consumption model, the total response model and the total response time calculating module are used for obtaining a self-contained power plant unit adjusting energy consumption model, a self-contained power plant total response time and a self-contained power plant total response time through a pre-constructed self-contained power plant generating set output adjusting energy consumption model and response model, an enterprise power side adjustable load adjusting energy consumption model and response model and an energy storage device adjusting energy consumption model and response model;
and the optimal regulation and control strategy solving module is used for solving the optimal regulation and control strategy of the power generation and utilization resources of the self-contained power plant by taking the minimum regulation and control energy consumption, the shortest response time and the minimum response times of the power generation and utilization resources of the self-contained power plant as optimization targets.
Further, the self-contained power plant unit adjusts the energy consumption model gammaTComprises the following steps:
Figure GDA0002451069240000071
wherein:
Figure GDA0002451069240000072
respectively a generator set before regulation and a controllable load switchThe status of the mobile station is,
Figure GDA0002451069240000073
respectively in the states of the regulated generator set and the controllable load switch,
Figure GDA0002451069240000074
in order to adjust the charging and discharging power of the pre-stored energy,
Figure GDA0002451069240000075
the charging and discharging power for the energy storage after adjustment;
total response model τ for self-contained power plantsTComprises the following steps:
Figure GDA0002451069240000076
wherein:
Figure GDA0002451069240000077
in order to adjust the on-off state of the front energy storage device,
Figure GDA0002451069240000078
the on-off state of the energy storage device is adjusted;
total number of responses J of self-contained power plantnum：
Figure GDA0002451069240000079
The self-contained power plant adjusts the energy consumption CT to be:
Figure GDA00024510692400000710
further, with the optimization objectives of minimum energy consumption, shortest response time and minimum response times for adjusting the power generation and utilization resources of the self-contained power plant, an optimal power generation and utilization resource regulation strategy is solved, and the method specifically comprises the following steps:
Figure GDA00024510692400000711
Figure GDA00024510692400000712
Figure GDA00024510692400000713
the constraints are as follows:
Figure GDA00024510692400000714
Figure GDA00024510692400000715
pGi(t+1)-pGit≤URi
pGit-pGi(t+1)≤DRi
DRi≤Ri≤URi
Figure GDA0002451069240000081
and solving to obtain an optimal power generation and utilization resource adjustment strategy of the self-contained power plant according to the given objective function and constraint conditions.
The invention has the beneficial effects that:
according to the invention, a model for adjusting the output of the generator, the controllable load and the energy storage device is established, on the basis, the multi-objective optimization problem is solved to obtain an optimal strategy, and the rapidity and the high efficiency of the power generation and utilization resource response of the self-contained power plant are ensured. The invention equates the power generation and utilization resources of the self-contained power plant into a whole, gives an optimal regulation and control method under the condition of satisfying all technical condition constraints, and fully excavates the regulation potential of the power generation and utilization resources of the self-contained power plant.
Drawings
FIG. 1 is a flow chart of a method of the present invention;
FIG. 2 is a model diagram of a generator set output constraint;
FIG. 3 is a classification chart of power generation and utilization resources of a self-contained power plant;
Detailed Description
The technical scheme of the invention is explained in detail in the following with the accompanying drawings.
Example 1:
as shown in fig. 1, the method for regulating and controlling power generation and utilization resources of a self-contained power plant of the present invention comprises the following steps:
step 1, on the power generation side of a self-contained power plant, establishing an energy consumption regulation model and a response model of the output of a generator set based on the characteristics of various generator sets in the self-contained power plant;
step 2, on the power utilization side of the enterprise, based on the characteristics of the production process of the enterprise, the adjustability of different power utilization links is analyzed, and a load-adjustable energy consumption adjusting model and a response model are constructed;
step 3, from the energy storage angle of the enterprise, establishing an energy consumption regulation model and a response model of the energy storage device based on the type and the performance of the energy storage device;
and 4, solving an optimal power generation and utilization resource regulation strategy by taking the minimum energy consumption, the shortest response time and the minimum response times of power generation and utilization resource regulation of the self-contained power plant as optimization targets.
In this embodiment, the step 1 is implemented by the following preferred scheme:
1-1, establishing an energy consumption adjusting model of the output of the generator set:
the self-contained power plant power generation resources mainly comprise self-contained power plant coal-fired unit power generation, self-contained power plant cogeneration unit power generation and self-contained power plant waste heat and residual pressure unit power generation. According to the characteristics of natural resources, some natural resources have the property of primary consumption, such as nonrenewable mineral resources, partially renewable forest resources and water resources, the use of the resources has the property of intermediate consumption, and the resources consumed by the running of the generator set are mainly coal and water. Therefore, the power generation energy consumption of the generator set can be mainly divided into initial construction energy consumption, unit operation energy consumption and operation and maintenance energy consumption. Assuming that the self-contained power plant comprises n generator sets, and the number of each generator set is i, establishing an energy consumption regulation model of the generator set output as follows:
CG[i]＝Czi+Cri+Cwi (1)
Czi＝C0 (2)
Figure GDA0002451069240000091
Cwi＝KwipGit (4)
Figure GDA0002451069240000092
Figure GDA0002451069240000093
wherein: CG is the total output of the self-contained power plant generator set to regulate energy consumption, CG i]Adjusting energy consumption, x, for the output of a self-contained power plant generator set iiThe working state of the generator i of the self-contained power plant is 1, the normal operation of the generator is performed, 0 is the shutdown state of the generator, and p isGitIs the power of the self-provided power plant generator set i output, gammaiRegulating energy consumption per unit output, CziThe initial construction energy consumption of the generator set i of the self-contained power plant is determined by the factors of the self-contained power plant scale, the installed capacity, the type of the generator set and the like, wherein C is used0Indicating the initial construction energy consumption. CriThe unit operation energy consumption of the self-contained power plant generating set i is related to the real-time output of the unit, ai、bi、ciThe energy consumption coefficient of the self-contained power plant generator set i. CwiMaintaining energy consumption for the operation of the generator set i of the self-contained power plant, wherein the energy consumption is determined by the using time length and the using mode of the generator set, KwiAnd the operation maintenance coefficient of the self-provided power plant generator set i.
1-2, constraint conditions of generator output:
in order to maintain real-time power balance, when the utility grid power fluctuation causes the system to have power surplus or shortage, the self-contained power plant unit can provide upward or downward flexible resources within the output range, and the constraint condition can be expressed as follows:
pGi(t+1)-pGit≤URi (7)
pGit-pGi(t+1)≤DRi (8)
Figure GDA0002451069240000101
wherein: URiFor the maximum upward climbing speed of the self-contained power plant generator set i, DRiFor the self-contained power plant generator set i maximum downward climbing speed, pGitThe output of the self-contained power plant generator set i at the moment t, pGi(t+1)The output of the self-contained power plant generator set i at the moment t +1,
Figure GDA0002451069240000102
for the minimum output of the generator i of the self-contained power plant,
Figure GDA0002451069240000103
the maximum output of the generator i of the self-contained power plant.
As shown in fig. 2, it can be found that the upper limit of the point a when adjusted upward is the maximum output of the unit, the upper limit of the point B when adjusted upward is the upward climbing upper limit of the unit, the lower limit of the point C when adjusted downward is the downward climbing lower limit of the unit, and the lower limit of the point D when adjusted downward is the minimum output of the unit.
1-3, establishing a generator demand response time model:
Figure GDA0002451069240000104
Figure GDA0002451069240000111
DRi≤Ri≤URi (12)
wherein:
Figure GDA0002451069240000112
is the output limit, R, of the generator set iiFor the ramp rate, τ, of the generator set iiIs the response time of the generator i.
And determining a model of the unit output of the generator for regulating energy consumption and response time of the self-contained power plant in the process of participating in the demand response according to the equations (6) and (10), and considering the constraint conditions of the output of the generator in the actual regulating process, wherein the constraint conditions comprise the equations (7), (8), (9) and (12).
In this embodiment, the step 2 is implemented by the following preferred scheme:
2-1, establishing a controllable load regulation energy consumption model:
in electric devices electrical energy is converted into mechanical, thermal, optical, acoustical or chemical energy to achieve a specific purpose. The electric equipment of the enterprise load side with the self-contained power plant comprises a motor, electric lighting, an electric furnace, electric welding and electrolysis equipment, the electric equipment is divided into a controllable load and an uncontrollable load according to whether the electric equipment can be adjusted, the uncontrollable load belongs to the type of consuming flexible resources, therefore, the adjustable capacity provided by the load is zero, the controllable load can actively respond to the fluctuation of external power, namely, the adjustable capacity is supplied, the controllable load is similar to a conventional power supply of the electric side and can be adjusted within a certain power range, and the real-time requirement of a power grid is matched.
When controllable load adjustment is carried out in the self-contained power plant, the total output of enterprises on the day is required to be constant, so that the adjustable capacity of different power utilization links is determined according to the production process of the enterprise to which the self-contained power plant belongs, and if the production process of the enterprise contains m controllable loads and the number of each controllable load is j, the controllable load adjustment energy consumption model can be expressed as follows:
CL[j]＝kjtμt(pj(t+1)-pjt)2·Δtj (13)
Figure GDA0002451069240000113
Figure GDA0002451069240000121
Figure GDA0002451069240000122
wherein: j is the number of the controllable load, j is 1,2 …, m is the total number of the controllable load, CL [ j]For the technical regulation of energy consumption, p, brought by process regulation and equipment running state fluctuation after the regulation of the controllable load jjtThe capacity of the controllable load j at time t, pj(t+1)Adjusted capacity, gamma, for the controllable load j at time t +1jRegulating energy consumption, k, for controlled load per unit powerjtFor the proportion of the load involved in the regulation at time t, μtIf the load running time is advanced when the controllable load participates in regulation for the time influence factor
Figure GDA0002451069240000123
Describing the lead time of the controllable load j, and defining if the load running time is shifted
Figure GDA0002451069240000124
Describing the lag time, Δ t, of a controllable load jjAdjusting the time span, TS, for a controllable load jjFor the load to start the working time, TEjThe working time is ended for the controllable load j, T denotes the time period, 24 hours a day.
2-2, establishing a controllable load response time model:
Figure GDA0002451069240000125
wherein: k is the number of the electric devices in the controllable load j, k is 1,2, …, p, p is the total number of the electric devices, and τ isjIn order to be able to control the response time of the load,
Figure GDA0002451069240000126
for the demand response time of the kth consumer in the controllable load j,
Figure GDA0002451069240000127
the demand response time of the p-th electric equipment in the controllable load j.
And (4) establishing a model for regulating energy consumption and response time in the process of participating in demand response by the controllable load in the enterprise to which the self-contained power plant belongs according to the formulas (14) and (17).
In this embodiment, the step 3 is implemented by the following preferred scheme:
3-1, establishing an energy consumption adjusting model of the energy storage device:
as a supplementary link of the operation of the power system, the energy storage has the characteristics of smooth output power and bidirectional adjustability, so that the energy storage is mainly used for compensating the under-cut or over-cut amount generated during the load action, and can effectively isolate the production and the use of electric energy in time, thereby improving the accuracy of power adjustment and assisting in solving the execution principle of instantaneous balance of supply and demand of the power system. At the same time, energy storage devices are expensive, so that an enterprise to which a self-contained power plant belongs is usually equipped with an energy storage device, and the energy consumption regulation model is as follows:
Figure GDA0002451069240000131
wherein: p is a radical ofsFor the magnitude of the power of the energy storage device, gammasFor regulating energy consumption, k, per unit of stored energy powersFor the depreciation factor, gamma, of the energy storage devicepThe power consumption coefficient is determined by the charge and discharge power of the energy storage device. Gamma raycThe capacity energy consumption coefficient is determined by the capacity of the energy storage device,
Figure GDA0002451069240000132
is the upper limit of the energy storage capacity.
3-2, constraint of capacity of the energy storage device:
Figure GDA0002451069240000133
wherein:
Figure GDA0002451069240000134
is the maximum power of the energy storage device.
3-3, establishing the response time of the energy storage device:
Figure GDA0002451069240000135
wherein: tau issFor the response time of the energy storage device, τqThe response time of the q-th response is n.
And (3) establishing a model for regulating energy consumption and response time in the process of enabling the energy storage devices in the enterprises to which the self-contained power plants belong to participate in demand response according to the equations (18) and (20), and considering the constraint of the capacity of the energy storage devices according to the equation (19).
In this embodiment, the step 4 is implemented by adopting the following preferred scheme:
4-1, establishing an equivalent load model P of the self-contained power plantT：
The power generation and utilization resources of the self-contained power plant comprise a generator set, an enterprise power load and an energy storage device, wherein the power generation resources comprise pure coal-fired unit power generation, cogeneration unit power generation, waste heat and residual pressure unit power generation and the energy storage device; the power utilization resources are mainly power utilization in the production process of enterprises, and the controllability of different power utilization environments in the production process is different, so that the analysis needs to be divided into controllable analysis and uncontrollable analysis, and the type, power and application scene of power utilization equipment can influence the controllable capacity of the power utilization equipment for controllable loads. As shown in fig. 3, when the self-contained power plant generator set, the controllable load of the enterprise to which the self-contained power plant generator set belongs, and the energy storage device are considered as an integral equivalent, and participate in the demand response to the outside, the load can be considered as an equivalent load, and the adjustment condition of the load is determined by the three, which can be expressed as follows:
Figure GDA0002451069240000141
wherein: pTEquivalent load of power resource for self-contained power plantjIs in the on-off state of the controllable load, 1 is the normal power consumption of the controllable load, 0 is the off state of the controllable load, and x0The state is the on-off state of the energy storage device, 1 is the normal work of the energy storage device, and 0 is the off-state of the energy storage device.
If the equivalent load obtained by the three components is integrated to output power to the power grid, which is equivalent to the output of a generator set in the power grid, the equivalent load can effectively participate in peak shaving during the power utilization peak of the power grid; if the equivalent load obtained by integrating the three components absorbs power from the power grid, which is equivalent to the power load in the power grid, the energy-saving system can help the new energy to be consumed in the low ebb of the power grid.
4-2, establishing a self-contained power plant unit regulation energy consumption model gammaT：
Calculating the unit adjustment energy consumption of the power generation and utilization resources of the self-contained power plant according to the adjustment energy consumption of the output of the generator set, the controllable load adjustment energy consumption and the energy storage device adjustment energy consumption, and expressing as follows:
Figure GDA0002451069240000142
wherein:
Figure GDA0002451069240000143
respectively in the states of the generator set before adjustment and the controllable load switch,
Figure GDA0002451069240000144
are respectively provided withFor regulated generator set, controllable load switch state, PTIn order to comprehensively consider the unit output, the electrical load and the equivalent load of the self-contained power plant obtained by the energy storage device,
Figure GDA0002451069240000145
in order to adjust the charging and discharging power of the pre-stored energy,
Figure GDA0002451069240000146
charge and discharge power, p, for regulated energy storagejtThe power of the controllable load j at time t.
4-3, establishing a total response time model tau of the self-contained power plantT：
Because the response time of the generator set, the controllable load and the stored energy in the enterprise to which the self-contained power plant belongs is different, the overall response time of the power generation and utilization resources of the self-contained power plant is the maximum response time of the individual power generation and utilization resources, and can be expressed as follows:
Figure GDA0002451069240000151
wherein:
Figure GDA0002451069240000152
in order to adjust the on-off state of the front energy storage device,
Figure GDA0002451069240000153
to adjust the on-off state of the post-energy storage device.
4-4, calculating the total response times J of the self-contained power plantnum：
Figure GDA0002451069240000154
4-5, solving an optimal regulation strategy:
the energy consumption CT for adjusting the power generation and utilization resources of the self-contained power plant can be obtained according to the energy consumption model for adjusting the power generation and utilization resources of the self-contained power plant and can be expressed as follows:
Figure GDA0002451069240000155
the optimization objectives of minimum energy consumption regulation, minimum total response time of each unit and minimum total response times of each unit of the power generation and utilization resources of the self-contained power plant can be expressed as follows:
Figure GDA0002451069240000156
Figure GDA0002451069240000157
Figure GDA0002451069240000158
simultaneously, the actual operation conditions of each unit are considered, and corresponding constraint conditions are listed as follows:
S.t:
Figure GDA0002451069240000159
Figure GDA00024510692400001510
pGi(t+1)-pGit≤URi (31)
pGit-pGi(t+1)≤DRi (32)
DRi≤Ri≤URi (33)
Figure GDA0002451069240000161
wherein: the target function minCT represents the total regulation of the equivalent load with the lowest energy consumption so as to ensure the equivalent wholeEconomic and environmental performance, objective function min tauTThe minimum number of times of unit and load actions leads to the minimum influence range of regulation and control, and the objective function minJnumThe response time of the equivalent whole is shown to be shortest so that the system can recover a stable state as soon as possible, and the listed constraints are respectively a power balance constraint, a unit output upper and lower limit constraint, a unit climbing rate constraint and an energy storage output power constraint.
And finally, solving to obtain an optimal strategy according to the given objective function and constraint conditions.
Example 2:
a regulation and control device for power generation and utilization resources of a self-contained power plant comprises:
the system comprises a self-contained power plant unit adjusting energy consumption model, a total response model and a total response time calculating module, wherein the self-contained power plant unit adjusting energy consumption model, the total response model and the total response time calculating module are used for obtaining a self-contained power plant unit adjusting energy consumption model, a self-contained power plant total response time and a self-contained power plant total response time through a pre-constructed self-contained power plant generating set output adjusting energy consumption model and response model, an enterprise power side adjustable load adjusting energy consumption model and response model and an energy storage device adjusting energy consumption model and response model;
and the optimal regulation and control strategy solving module is used for solving the optimal regulation and control strategy of the power generation and utilization resources of the self-contained power plant by taking the minimum regulation and control energy consumption, the shortest response time and the minimum response times of the power generation and utilization resources of the self-contained power plant as optimization targets.
Self-contained power plant unit regulation energy consumption model gammaTComprises the following steps:
Figure GDA0002451069240000162
wherein:
Figure GDA0002451069240000163
respectively in the states of the generator set before adjustment and the controllable load switch,
Figure GDA0002451069240000164
respectively regulated generator set and controllable loadThe state of the switch is changed,
Figure GDA0002451069240000165
in order to adjust the charging and discharging power of the pre-stored energy,
Figure GDA0002451069240000166
the charging and discharging power for the energy storage after adjustment;
total response time model τ for self-contained power plantsTComprises the following steps:
Figure GDA0002451069240000171
wherein:
Figure GDA0002451069240000172
in order to adjust the on-off state of the front energy storage device,
Figure GDA0002451069240000173
the on-off state of the energy storage device is adjusted;
total number of responses J of self-contained power plantnum：
Figure GDA0002451069240000174
The self-contained power plant adjusts the energy consumption CT to be:
Figure GDA0002451069240000175
the method comprises the following steps of solving an optimal power generation and utilization resource regulation strategy by taking the minimum energy consumption, the shortest response time and the minimum response times of power generation and utilization resource regulation of a self-contained power plant as optimization targets, and specifically comprises the following steps:
Figure GDA0002451069240000176
Figure GDA0002451069240000177
Figure GDA0002451069240000178
the constraints are as follows:
Figure GDA00024510692400001711
Figure GDA0002451069240000179
pGi(t+1)-pGit≤URi
pGit-pGi(t+1)≤DRi
DRi≤Ri≤URi
Figure GDA00024510692400001710
and solving to obtain an optimal power generation and utilization resource adjustment strategy of the self-contained power plant according to the given objective function and constraint conditions.
The invention comprehensively considers the adjustable power generation and utilization resources of the self-contained power plant, including the generator, the adjustable load and the energy storage device, and the three are equivalent to be integrally involved in demand response, thereby fully exploiting the demand response potential of the self-contained power plant and remarkably lightening the peak regulation burden of the power grid.
The embodiments are only for illustrating the technical idea of the present invention, and the technical idea of the present invention is not limited thereto, and any modifications made on the basis of the technical scheme according to the technical idea of the present invention fall within the scope of the present invention.

Claims (9)

1. A method for regulating and controlling power generation and utilization resources of a self-contained power plant is characterized by comprising the following steps:
the method comprises the steps of obtaining a unit regulation energy consumption model of the self-contained power plant, a total response model of the self-contained power plant and the total response times of the self-contained power plant through a pre-constructed regulation energy consumption model and response model of the self-contained power plant generator set output, a regulation energy consumption model and response model of the enterprise power utilization side adjustable load and a regulation energy consumption model and response model of the energy storage device, and solving an optimal power generation and utilization resource regulation strategy by taking the minimum power generation and utilization resource regulation energy consumption, the shortest response time and the minimum response times of the self-contained power plant as optimization targets.
2. The method for regulating and controlling the power generation and utilization resources of the self-contained power plant according to claim 1, wherein the model for regulating the energy consumption of the output of the generator set of the self-contained power plant is as follows:
Figure FDA0002998196300000011
CG[i]＝Czi+Cri+Cwi
Czi＝C0
Figure FDA0002998196300000012
Cwi＝KwipGit
Figure FDA0002998196300000013
wherein: CG is the total output of the self-contained power plant generator set to regulate energy consumption, CG i]Adjusting energy consumption, x, for the output of a self-contained power plant generator set iiFor the operating state of the generator i of the self-contained power plant, pGitIs the power of the self-provided power plant generator set i output, gammaiRegulating energy consumption per unit output, CziEnergy consumption for initial construction of self-contained power plant generator set i, C0Representing initial construction energy consumption, CriFor the unit operating energy consumption of the self-contained power plant generator unit i, ai、bi、ciIs the energy consumption coefficient of the self-contained power plant generator set i, CwiEnergy consumption for operation and maintenance of self-contained power plant generator set i, KwiThe operation maintenance coefficient of the self-contained power plant generator set i is obtained;
the constraints are as follows:
the unit output force when adjusted upwards is expressed as follows:
pGi(t+1)-pGit≤URi
the set output down adjustment is expressed as follows:
pGit-pGi(t+1)≤DRi
constraint of maximum and minimum output of the unit:
Figure FDA0002998196300000021
wherein: URiFor the maximum upward climbing speed of the self-contained power plant generator set i, DRiFor the self-contained power plant generator set i maximum downward climbing speed, pGitThe output of the self-contained power plant generator set i at the moment t, pGi(t+1)The output of the self-contained power plant generator set i at the moment t +1,
Figure FDA0002998196300000022
the minimum output of the self-contained power plant generator set i at the moment t,
Figure FDA0002998196300000023
the maximum output of the self-contained power plant generator set i at the moment t;
the demand response time model of the generator set of the self-contained power plant is as follows:
Figure FDA0002998196300000024
Figure FDA0002998196300000025
DRi≤Ri≤URi
in the above formula, the first and second carbon atoms are,
Figure FDA0002998196300000026
is the output limit, R, of the generator set iiFor the ramp rate, τ, of the generator set iiIs the response time of the genset i.
3. The method for regulating and controlling the power generation and utilization resources of the self-contained power plant according to claim 1, wherein the model for regulating the energy consumption of the adjustable load at the power utilization side of the enterprise is as follows:
Figure FDA0002998196300000027
CL[j]＝kjtμt(pj(t+1)-pjt)2·△tj
Figure FDA0002998196300000028
Figure FDA0002998196300000031
wherein: j is the number of the controllable load, j is 1,2 …, m is the total number of the controllable load, CL [ j]For the regulated energy consumption, p, of the controllable load j due to process regulation and equipment operating state fluctuationjtThe capacity of the controllable load j at time t, pj(t+1)Adjusted capacity, gamma, for the controllable load j at time t +1jFor regulating the energy consumption, k, per unit power of the controllable loadjtFor the proportion of the load involved in the regulation at time t, μtIf the controllable load participates in the regulation for the time influence factor, the load is adjustedRun time advanced, then define
Figure FDA0002998196300000032
Describing the lead time of the controllable load j, and defining if the load running time is shifted
Figure FDA0002998196300000033
Describing the lag time, Δ t, of a controllable load jjAdjusting the time span, TS, for a controllable load jjFor the load to start the working time, TEjEnding the working time for the controllable load j, wherein T represents a time period;
the response model of the adjustable load is:
Figure FDA0002998196300000034
wherein: k is the number of the electric devices in the controllable load j, k is 1,2, …, p, p is the total number of the electric devices, and τ isjIn order to be able to control the response time of the load,
Figure FDA0002998196300000035
for the demand response time of the kth consumer in the controllable load j,
Figure FDA0002998196300000036
the demand response time of the p-th electric equipment in the controllable load j.
4. The method for regulating and controlling the power generation and utilization resources of the self-contained power plant according to claim 1, wherein the model for regulating the energy consumption of the energy storage device is as follows:
Figure FDA0002998196300000037
wherein p issFor the magnitude of the power of the energy storage device, gammasFor regulating energy consumption, k, per unit of stored energy powersFor the depreciation factor, gamma, of the energy storage devicepCoefficient of power consumption gammacIn order to obtain the capacity energy consumption coefficient,
Figure FDA0002998196300000038
is the upper limit of the energy storage capacity;
and (3) constraint of the capacity of the energy storage device:
Figure FDA0002998196300000039
wherein the content of the first and second substances,
Figure FDA0002998196300000041
the maximum power of the energy storage device;
the response time model of the energy storage device is:
Figure FDA0002998196300000042
wherein, tausFor the response time of the energy storage device, τqThe response time of the q-th response is n.
5. The method for regulating power generation and utilization resources of the self-contained power plant as claimed in claim 1, wherein the self-contained power plant unit regulates the energy consumption model γTComprises the following steps:
Figure FDA0002998196300000043
wherein:
Figure FDA0002998196300000044
respectively in the states of the generator set before adjustment and the controllable load switch,
Figure FDA0002998196300000045
respectively the regulated generator set and the controllable load switch state PTIn order to comprehensively consider the unit output, the electrical load and the equivalent load of the self-contained power plant obtained by the energy storage device,
Figure FDA0002998196300000046
in order to adjust the charging and discharging power of the pre-stored energy,
Figure FDA0002998196300000047
charge and discharge power, p, for regulated energy storagejtThe capacity of the controllable load j at the time t; p is a radical ofGitIs the power of the self-provided power plant generator set i output, gammaiJ is the number of the controllable load, j is 1,2 …, m is the total number of the controllable load, gammasFor regulating energy consumption per unit of stored energy power, gammajThe energy consumption is adjusted for the unit power of the controllable load;
total response time model τ for self-contained power plantsTComprises the following steps:
Figure FDA0002998196300000048
wherein:
Figure FDA0002998196300000049
in order to adjust the on-off state of the front energy storage device,
Figure FDA00029981963000000410
the on-off state of the energy storage device is adjusted; tau isiFor the response time of the generator i, τjFor controllable response time of the load, tausIs the response time of the energy storage device;
total number of responses J of self-contained power plantnum：
Figure FDA0002998196300000051
The self-contained power plant adjusts the energy consumption CT to be:
Figure FDA0002998196300000052
6. the method for regulating and controlling the power generation and utilization resources of the self-contained power plant as claimed in claim 5, wherein the optimal power generation and utilization resource regulation strategy is solved by taking the minimum energy consumption, the shortest response time and the minimum response times of the power generation and utilization resources of the self-contained power plant as optimization targets, and specifically comprises the following steps:
Figure FDA0002998196300000053
Figure FDA0002998196300000054
Figure FDA0002998196300000055
the constraints are as follows:
Figure FDA0002998196300000056
Figure FDA0002998196300000057
pGi(t+1)-pGit≤URi
pGit-pGi(t+1)≤DRi
DRi≤Ri≤URi
Figure FDA0002998196300000058
solving to obtain an optimal power generation and utilization resource adjustment strategy of the self-contained power plant according to the given objective function and constraint conditions; x is the number ofiOperating conditions, x, of self-contained power plant generators ijFor the switching state of the controllable load, x0Is the switching state of the energy storage device, psThe power of the energy storage device is the same,
Figure FDA0002998196300000059
for the minimum output of the generator i of the self-contained power plant,
Figure FDA00029981963000000510
is the maximum output of the generator i of the self-contained power plant, pGi(t+1)The output of the self-provided power plant generator set i at the moment t +1, URiThe maximum upward climbing speed of the generator set i of the self-contained power plant,
Figure FDA00029981963000000511
is the maximum power of the energy storage device.
7. A regulation and control device for generating and using electricity resources of a self-contained power plant is characterized by comprising:
the system comprises a self-contained power plant unit adjusting energy consumption model, a total response model and a total response time calculating module, wherein the self-contained power plant unit adjusting energy consumption model, the total response model and the total response time calculating module are used for obtaining a self-contained power plant unit adjusting energy consumption model, a self-contained power plant total response time and a self-contained power plant total response time through a pre-constructed self-contained power plant generating set output adjusting energy consumption model and response model, an enterprise power side adjustable load adjusting energy consumption model and response model and an energy storage device adjusting energy consumption model and response model;
and the optimal regulation and control strategy solving module is used for solving the optimal regulation and control strategy of the power generation and utilization resources of the self-contained power plant by taking the minimum regulation and control energy consumption, the shortest response time and the minimum response times of the power generation and utilization resources of the self-contained power plant as optimization targets.
8. The device for regulating power generation and utilization resources of a self-contained power plant as claimed in claim 7, wherein the unit regulation energy consumption model γ of the self-contained power plantTComprises the following steps:
Figure FDA0002998196300000061
wherein:
Figure FDA0002998196300000062
respectively in the states of the generator set before adjustment and the controllable load switch,
Figure FDA0002998196300000063
respectively in the states of the regulated generator set and the controllable load switch,
Figure FDA0002998196300000064
in order to adjust the charging and discharging power of the pre-stored energy,
Figure FDA0002998196300000065
the charging and discharging power for the energy storage after adjustment; p is a radical ofGitIs the power of the self-provided power plant generator set i output, gammaiJ is the number of the controllable load, j is 1,2 …, m is the total number of the controllable load, gammasFor regulating energy consumption per unit of stored energy power, gammajThe energy consumption is adjusted for the unit power of the controllable load;
total response model τ for self-contained power plantsTComprises the following steps:
Figure FDA0002998196300000066
wherein:
Figure FDA0002998196300000067
to be adjusted beforeThe on-off state of the energy storage device,
Figure FDA0002998196300000068
the on-off state of the energy storage device is adjusted; tau isiFor the response time of the generator i, τjFor controllable response time of the load, tausIs the response time of the energy storage device;
total number of responses J of self-contained power plantnum：
Figure FDA0002998196300000071
The self-contained power plant adjusts the energy consumption CT to be:
Figure FDA0002998196300000072
9. the device for regulating and controlling the power generation and utilization resources of the self-contained power plant as claimed in claim 8, wherein the optimal power generation and utilization resource regulation strategy is solved by taking the minimum energy consumption, the shortest response time and the minimum response times of the power generation and utilization resources of the self-contained power plant as optimization targets, and specifically comprises the following steps:
Figure FDA0002998196300000073
Figure FDA0002998196300000074
Figure FDA0002998196300000075
the constraints are as follows:
Figure FDA0002998196300000076
Figure FDA0002998196300000077
pGi(t+1)-pGit≤URi
pGit-pGi(t+1)≤DRi
DRi≤Ri≤URi
Figure FDA0002998196300000078
solving to obtain an optimal power generation and utilization resource adjustment strategy of the self-contained power plant according to the given objective function and constraint conditions; x is the number ofiOperating conditions, x, of self-contained power plant generators ijFor the switching state of the controllable load, x0Is the switching state of the energy storage device, psThe power of the energy storage device is the same,
Figure FDA0002998196300000079
for the minimum output of the generator i of the self-contained power plant,
Figure FDA00029981963000000710
is the maximum output of the generator i of the self-contained power plant, pGi(t+1)The output of the self-provided power plant generator set i at the moment t +1, URiThe maximum upward climbing speed of the generator set i of the self-contained power plant,
Figure FDA0002998196300000081
is the maximum power of the energy storage device.
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