CN105608252B - Simulation method and device for power grid fault simulation test - Google Patents
Simulation method and device for power grid fault simulation test Download PDFInfo
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- CN105608252B CN105608252B CN201510901940.2A CN201510901940A CN105608252B CN 105608252 B CN105608252 B CN 105608252B CN 201510901940 A CN201510901940 A CN 201510901940A CN 105608252 B CN105608252 B CN 105608252B
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- G06F30/367—Design verification, e.g. using simulation, simulation program with integrated circuit emphasis [SPICE], direct methods or relaxation methods
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Abstract
The embodiment of the invention provides a simulation method and a simulation device for a power grid fault simulation test, relates to the technical field of electricity, and is used for simulating mobile monitoring equipment of a power grid fault simulation test system of a high-altitude photovoltaic power station so as to be beneficial to determining a fault position when the mobile monitoring equipment of the power grid fault simulation test system of the high-altitude photovoltaic power station fails. The method comprises the following steps: establishing simulation task information; establishing a simulation model corresponding to the simulation task information, and acquiring simulation parameters; setting the simulation parameters in the simulation model, and compiling and connecting by using a compiler to obtain a simulation result; and outputting the simulation result.
Description
Technical Field
The invention relates to the technical field of electricity, in particular to a simulation method and a simulation device for a power grid fault simulation test.
Background
In recent years, China strongly supports the development of new energy technology, with the rapid increase of the installed proportion of solar photovoltaic power generation, as with a wind power generator set, an electric power system puts forward a requirement on the operation capacity of a large and medium-sized photovoltaic power station connected to a power grid when the power grid has transient faults, and the 'photovoltaic power station connection power grid technical regulation' of the national power grid company clearly requires that the large and medium-sized photovoltaic power station has low-voltage ride through capacity.
With the continuous progress of the photovoltaic grid-connected detection test, the photovoltaic grid-connected detection equipment suitable for the high-altitude area at present is based on power electronic equipment, the amplitude of output voltage is changed through the control of power electronic components, the fault state of the power grid voltage is simulated, different wiring modes are selected according to the actual wiring modes of each power station, the used test equipment is connected in series between an inverter and a main bus of the power station, and meanwhile, the control of the power electronic equipment tests the tested inverter.
Because the power electronic element has the characteristics of generating harmonic waves and cannot actually reflect the real characteristics of the power grid, the mobile monitoring equipment of the power grid fault simulation test system of the high-altitude photovoltaic power station is provided in the power grid fault simulation test of the large-scale grid-connected photovoltaic power station in the high poster area at present.
When the mobile monitoring equipment of the high-altitude photovoltaic power station power grid fault simulation test system fails, a method for simulating the mobile monitoring equipment of the high-altitude photovoltaic power station power grid fault simulation test system is generally adopted, and each data in a simulation result is analyzed, so that a part with a fault can be determined. However, in the prior art, there is no method for simulating the fault test of the mobile monitoring device of the high-altitude photovoltaic power station power grid fault simulation test system. This problem needs to be solved.
Disclosure of Invention
The embodiment of the invention provides a simulation method and a simulation device for power grid fault simulation test, which are used for simulating mobile monitoring equipment of a power grid fault simulation test system of a high-altitude photovoltaic power station, and further help to determine the fault position when the mobile monitoring equipment of the power grid fault simulation test system of the high-altitude photovoltaic power station fails.
In order to achieve the above purpose, the embodiment of the invention adopts the following technical scheme:
the embodiment of the invention provides a simulation method for a power grid fault simulation test, which comprises the following steps: establishing simulation task information; establishing a simulation model corresponding to the simulation task information, and acquiring simulation parameters; setting the simulation parameters in the simulation model, and compiling and connecting by using a compiler to obtain a simulation result; and outputting the simulation result.
Further, the outputting the simulation result includes: generating a corresponding simulation curve in the POL according to the simulation result; and outputting the simulation curve.
Further, the setting of the simulation parameters in the simulation model, and the compiling and connecting by using a compiler to obtain a simulation result includes: and setting the simulation parameters in the simulation model, and compiling and connecting by using a FORTRAN compiler to obtain a simulation result.
Further, the simulation model includes: the vacuum high-voltage circuit breaker, take a percentage current-limiting reactor and take a percentage short-circuit reactor more.
Further, an embodiment of the present invention provides a simulation apparatus, including: the establishing unit is used for establishing simulation task information; the establishing unit is further used for establishing a simulation model corresponding to the simulation task information; an acquisition unit for acquiring simulation parameters; the processing unit is used for setting the simulation parameters in the simulation model, and compiling and connecting the simulation parameters by using a compiler to obtain a simulation result; and the output unit is used for outputting the simulation result.
Further, the output unit is specifically configured to generate a corresponding simulation curve in the POL according to the simulation result; and outputting the simulation curve.
Further, the processing unit is specifically configured to set the simulation parameters in the simulation model, and perform compiling and connection by using a FORTRAN compiler to obtain a simulation result.
Further, the simulation model includes: the vacuum high-voltage circuit breaker, take a percentage current-limiting reactor and take a percentage short-circuit reactor more.
The embodiment of the invention provides a simulation method and a simulation device for a power grid fault simulation test, which comprise the following steps: establishing simulation task information; establishing a simulation model corresponding to the simulation task information, acquiring simulation parameters, setting the simulation parameters in the simulation model, compiling by using a compiler, and connecting to obtain a simulation result; and outputting the simulation result. Therefore, according to the simulation method and the simulation system, the simulation model can be established according to the mobile monitoring equipment of the high-altitude photovoltaic power station power grid fault simulation test system, and further the mobile monitoring equipment of the high-altitude photovoltaic power station power grid fault simulation test system can be simulated. Therefore, the simulation of the mobile monitoring equipment of the high-altitude photovoltaic power station power grid fault simulation test system is realized, and the purpose of determining the fault position when the mobile monitoring equipment of the high-altitude photovoltaic power station power grid fault simulation test system fails is further facilitated.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to these drawings without creative efforts.
Fig. 1 is a schematic flow chart of a simulation method for a power grid fault simulation test according to an embodiment of the present invention;
fig. 2 is a schematic diagram of an example of a simulation method for a power grid fault simulation test according to an embodiment of the present invention;
FIG. 3 is a schematic diagram of a simulation curve provided by an embodiment of the present invention;
fig. 4 is a schematic structural diagram of a simulation apparatus according to an embodiment of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The embodiment of the invention provides a simulation method for a power grid fault simulation test, which comprises the following steps of:
step 101, establishing simulation task information.
Specifically, when a user needs to establish simulation for the mobile monitoring equipment of the high-altitude photovoltaic power station power grid fault simulation test system, the user needs to send relevant data of the mobile monitoring equipment of the high-altitude photovoltaic power station power grid fault simulation test system to the simulation device. The simulation device can establish simulation task information according to received related data of the mobile monitoring equipment of the high-altitude photovoltaic power station power grid fault simulation test system, and stores specific values of various parameters.
And 102, establishing a simulation model corresponding to the simulation task information, and acquiring simulation parameters.
Specifically, after the simulation task information is established, the simulation device can determine each component for establishing the simulation model according to the established simulation task information, so that an electrical main wiring diagram can be constructed according to each component, and the simulation model can be established. When the simulation model is built, and each component is determined, simulation parameters of each component can be determined in the built simulation task information.
It should be noted that pscad (power System Computer Aided design) is a most widely used program in the world for researching the transient process of an electric power System, and these two kinds of software can simulate a power supply, a motor, a transformer, a circuit breaker, a centralized parameter component, a distributed parameter component, a nonlinear component, a control System, etc. to be flexibly combined into an arbitrary System, so as to conveniently simulate an operation overvoltage, record required data, and intentionally change some parameters, thereby analyzing the sensitivity of the operation overvoltage to some influencing parameters.
The PSCAD is used as a graphical user interface of the software to complete tasks of construction, simulation operation, result analysis and the like of a system network diagram to be researched, and with the help of the PSCAD, the process of system modeling is greatly simplified.
At this time, when the simulation device establishes the simulation model, the simulation device establishes the simulation model according to the EMTP software.
And 103, setting simulation parameters in the simulation model, and compiling and connecting by using a compiler to obtain a simulation result.
Specifically, after the simulation device obtains the simulation parameters, the simulation device sets the simulation parameters in the simulation model, that is, sets the components of the simulation model to the values of the corresponding simulation parameters. Thus, the simulation model is set. After the simulation model can be built, the compiler compiles and connects the action sequence and the action time of the simulation device in the simulation process, and after the compiler compiles and connects, the simulation device can obtain a simulation result.
Further, setting simulation parameters in the simulation model, and performing compiling and connection by using a compiler to obtain a simulation result includes: and setting the simulation parameters in a simulation model, and compiling and connecting by using a FORTRAN compiler to obtain a simulation result.
That is, after the simulation model is built, the simulation device carries out compiling and connecting through a FORTRAN compiler to obtain a simulation result.
And 104, outputting the simulation result.
Specifically, after the simulation result is obtained by the simulation device, the simulation result can be input into a display file and displayed to a user.
Further, outputting the simulation result comprises: generating a corresponding simulation curve in the PSCAD according to the simulation result; and outputting a simulation curve.
Specifically, when the simulation device needs to display the simulation result to the user in a curve mode, the simulation curve can be generated in real time in the PSCAD when the simulation result is obtained. So that the generated simulation curve can be output for the user to watch.
Further, when the simulation of the mobile monitoring device of the high-altitude photovoltaic power station power grid fault simulation test system needs to be established in the embodiment of the present invention, the established simulation model in step 102 includes: the vacuum high-voltage circuit breaker, take a percentage current-limiting reactor and take a percentage short-circuit reactor more.
For example, if the embodiment of the present invention needs to establish the simulation of the mobile monitoring device of the high-altitude photovoltaic power station power grid fault simulation test system, at this time, the simulation model includes: vacuum high voltage circuit breakers CB1, CB2, CB3 and CB4, as shown in fig. 2. A multi-tap current limiting reactor E1 and a multi-tap short-circuit reactor E2. Wherein, CB1, CB2, CB3 and CB4 can be 35Kv (kilovolt) vacuum high-voltage circuit breakers, the rated current is 1250A, the breaking capacity is more than or equal to 24kA, and the breaking time is less than or equal to 60 ms.
The method comprises the steps of establishing parameters of a mobile monitoring device of a high-altitude photovoltaic power station power grid fault simulation test system according to actual needs, and setting parameters of a vacuum high-voltage circuit breaker of a simulation model.
The inductance values of the multi-tap current limiting reactor E1 may be 212mH (millihenry), 146mH, 108mH, and 46mH, respectively. The inductance values of the multi-tap short-circuit reactor E2 are 588mH, 428mH, 336mH and 128mH, respectively.
The specific simulation values of E1 and E2 can establish parameter settings of mobile monitoring equipment of the high-altitude photovoltaic power station power grid fault simulation test system according to actual needs.
Furthermore, according to actual conditions, a resistor and a capacitor are respectively added in the simulation model building process, the resistance value is set as required to establish the actual resistance value of the mobile monitoring equipment of the high-altitude photovoltaic power station power grid fault simulation test system, and the capacitance value is set according to the actual capacitance value of the equipment.
If a 35kV system lightning arrester is installed in the mobile monitoring equipment for suppressing overvoltage of the high-altitude photovoltaic power station power grid fault simulation test system during operation, the 35kV zinc oxide lightning arrester also needs to be built in the simulation model building process in order to correspond to the mobile monitoring equipment for the actual high-altitude photovoltaic power station power grid fault simulation test system during the simulation model building process.
In the process of building a power output model of a photovoltaic power station inverter of a simulation model, an actual power output curve of the photovoltaic power station needs to be considered, through actual test on the power output of the photovoltaic power station inverter and simulation on the power output curve of the photovoltaic power station, the power output of a related photovoltaic power station inverter can be replaced by a direct current simulation source, and through the actual power output curve of a measured photovoltaic power station, the actual power output curve of the photovoltaic power station is fitted in direct current simulation source equipment, so that the output of the direct current simulation source is closer to the actual power output of the photovoltaic power station inverter.
As described in the above example, if a power grid fault simulation system simulation diagram is constructed by using the PSCAD software in the example, the working condition with the theoretical drop depth of 66% is simulated. Then, the simulation model further comprises: and a current limiting reactor L1 and a short-circuit reactor L2 connected in series with the L1, wherein the L1 is 212mH, the L2 is 428mH, the short-circuit mode is three-phase symmetric short-circuit, the CB3 is closed when 0.8S (second) is assumed, the CB3 is opened when 1.3S is assumed, and the CB3 cuts off the current to be 10A.
The parameters of the resistance-capacitance absorber RC are selected to be 100 omega and 0.1uF, and the adding position is the relative ground of the test point and the short-circuit point. Wherein, the RC refers to a 0.1uF capacitor and a 100 ohm resistor.
The lightning arrester Z is of a three-phase combination type, the interphase rated voltage is set to be 24kV, and the phase-ground rated voltage is set to be 20 kV.
After the setting of the simulation parameters of the simulation model is completed, compiling and connecting can be performed through a FORTRAN compiler to obtain a simulation result. In order to reflect the simulation result more clearly, the simulation result can be converted into a simulation curve through the PSCAD, and the simulation curve is displayed. Wherein, the simulation result can generate a simulation curve in real time in the PSCAD along with the progress of the program, as shown in FIG. 3. After the PSCAD generates the simulation curve, the simulation curve can be displayed so that a user can check whether the operation result is reasonable.
Further, after the PSCAD generates the simulation curve, the simulation apparatus may send the simulation curve to the MATLAB through the MATLAB interface, so that the MATLAB verifies the simulation result, and determines whether the simulation result is reasonable. The embodiment of the invention provides a simulation method for a power grid fault simulation test, which comprises the following steps: establishing simulation task information: establishing a simulation model corresponding to the simulation task information, acquiring simulation parameters, setting the simulation parameters in the simulation model, compiling by using a compiler, and connecting to obtain a simulation result; and outputting the simulation result. Therefore, according to the simulation method and the simulation system, the simulation model can be established according to the mobile monitoring equipment of the high-altitude photovoltaic power station power grid fault simulation test system, and further the mobile monitoring equipment of the high-altitude photovoltaic power station power grid fault simulation test system can be simulated. Therefore, the simulation of the mobile monitoring equipment of the high-altitude photovoltaic power station power grid fault simulation test system is realized, and the purpose of determining the fault position when the mobile monitoring equipment of the high-altitude photovoltaic power station power grid fault simulation test system fails is further facilitated.
An embodiment of the present invention provides a simulation apparatus, as shown in fig. 4, including:
the establishing unit 401 is configured to establish simulation task information.
The establishing unit 401 is further configured to establish a simulation model corresponding to the simulation task information.
An obtaining unit 402, configured to obtain simulation parameters.
And the processing unit 403 is configured to set simulation parameters in the simulation model, and perform compiling and connecting by using a compiler to obtain a simulation result.
Specifically, the processing unit 403 is specifically configured to set simulation parameters in the simulation model, and perform compiling and connecting by using a FORTRAN compiler to obtain a simulation result.
And an output unit 404, configured to output the simulation result.
Specifically, the output unit 404 is specifically configured to generate a corresponding simulation curve in the POL according to the simulation result. And outputting a simulation curve.
Further, the simulation model includes: the vacuum high-voltage circuit breaker, take a percentage current-limiting reactor and take a percentage short-circuit reactor more.
An embodiment of the present invention provides a simulation apparatus, including: establishing simulation task information; establishing a simulation model corresponding to the simulation task information, acquiring simulation parameters, setting the simulation parameters in the simulation model, compiling by using a compiler, and connecting to obtain a simulation result; and outputting the simulation result. Therefore, according to the simulation method and the simulation system, the simulation model can be established according to the mobile monitoring equipment of the high-altitude photovoltaic power station power grid fault simulation test system, and further the mobile monitoring equipment of the high-altitude photovoltaic power station power grid fault simulation test system can be simulated. Therefore, the simulation of the mobile monitoring equipment of the high-altitude photovoltaic power station power grid fault simulation test system is realized, and the purpose of determining the fault position when the mobile monitoring equipment of the high-altitude photovoltaic power station power grid fault simulation test system fails is further facilitated.
Finally, it should be noted that: the above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.
Claims (2)
1. A simulation method for a power grid fault simulation test is characterized by comprising the following steps:
(1) establishing simulation task information;
specifically, when a user needs to establish simulation for the mobile monitoring equipment of the high-altitude photovoltaic power station power grid fault simulation test system, relevant data of the mobile monitoring equipment of the high-altitude photovoltaic power station power grid fault simulation test system needs to be sent to the simulation device; the simulation device establishes simulation task information according to the received relevant data of the mobile monitoring equipment of the high-altitude photovoltaic power station power grid fault simulation test system, and stores specific values of all the parameters;
(2) establishing a simulation model corresponding to the simulation task information, and acquiring simulation parameters; the simulation model comprises a vacuum high-voltage circuit breaker, a multi-tap current-limiting reactor and a multi-tap short-circuit reactor;
specifically, after the simulation task information is established, the simulation device determines each component for establishing the simulation model according to the established simulation task information, so that an electrical main wiring diagram is constructed according to each component, and the simulation model is established; when a simulation model is established and each component is determined, simulation parameters of each component can be determined in the established simulation task information;
(3) setting the simulation parameters in the simulation model, and compiling and connecting by using a compiler to obtain a simulation result; the compiler is a FORTRAN compiler;
specifically, after the simulation device obtains the simulation parameters, the simulation parameters are set in the simulation model, that is, each component of the simulation model is set to the value of the corresponding simulation parameter, and the setting of the simulation model is completed; after the simulation model is built by the simulation device, compiling and connecting the action sequence and the action time of the simulation device in the simulation process through a compiler, and after the compiling and connecting of the compiler, obtaining a simulation result by the simulation device;
(4) outputting a simulation result; the simulation result output comprises: generating a corresponding simulation curve in the POL according to the simulation result; and outputting the simulation curve.
2. The simulation device for the simulation method of the grid fault simulation test according to claim 1, wherein the simulation device is used in the method of the grid fault simulation test, and the simulation device comprises:
the establishing unit is used for establishing simulation task information;
the establishing unit is further used for establishing a simulation model corresponding to the simulation task information; the simulation model comprises the following steps: the device comprises a vacuum high-voltage circuit breaker, a multi-tap current-limiting reactor and a multi-tap short-circuit reactor;
an acquisition unit for acquiring simulation parameters;
the processing unit is used for setting the simulation parameters in the simulation model, and compiling and connecting by using a compiler to obtain a simulation result, wherein the compiler is a FORTRAN compiler;
the output unit is used for outputting the simulation result; the output unit is specifically configured to generate a corresponding simulation curve in the POL according to the simulation result.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105956290B (en) * | 2016-05-06 | 2019-06-07 | 国网江苏省电力有限公司检修分公司 | A kind of Mechanical Failure of HV Circuit Breaker diagnostic method based on multi-data fusion technology |
| CN110943474A (en) * | 2019-10-24 | 2020-03-31 | 国网甘肃省电力公司电力科学研究院 | Photovoltaic module output characteristic analysis method under power grid side fault |
| CN112836345A (en) * | 2021-01-07 | 2021-05-25 | 云南电网有限责任公司电力科学研究院 | Overvoltage simulation method for switching reactor of circuit breaker |
| CN116151047B (en) * | 2023-04-21 | 2023-06-27 | 嘉豪伟业科技有限公司 | Power dispatching data network fault simulation method and system |
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