CN114204566B - Intelligent modeling method for transformer substation in automatic voltage control - Google Patents

Intelligent modeling method for transformer substation in automatic voltage control Download PDF

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CN114204566B
CN114204566B CN202111447678.0A CN202111447678A CN114204566B CN 114204566 B CN114204566 B CN 114204566B CN 202111447678 A CN202111447678 A CN 202111447678A CN 114204566 B CN114204566 B CN 114204566B
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control
model
transformer substation
substation
transformer
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CN114204566A (en
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姚维平
赵越
鄂志君
郭凌旭
王桂林
杨帮宇
王森
刘伟
边疆
周连升
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State Grid Corp of China SGCC
State Grid Tianjin Electric Power Co Ltd
Electric Power Research Institute of State Grid Tianjin Electric Power Co Ltd
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State Grid Corp of China SGCC
State Grid Tianjin Electric Power Co Ltd
Electric Power Research Institute of State Grid Tianjin Electric Power 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
    • H02J3/12—Circuit arrangements for ac mains or ac distribution networks for adjusting voltage in ac networks by changing a characteristic of the network load
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F30/00—Computer-aided design [CAD]
    • G06F30/20—Design optimisation, verification or simulation
    • 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
    • H02J3/12—Circuit arrangements for ac mains or ac distribution networks for adjusting voltage in ac networks by changing a characteristic of the network load
    • H02J3/16—Circuit arrangements for ac mains or ac distribution networks for adjusting voltage in ac networks by changing a characteristic of the network load by adjustment of reactive power
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F2111/00—Details relating to CAD techniques
    • G06F2111/04—Constraint-based CAD
    • 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
    • H02J2203/00—Indexing scheme relating to details of circuit arrangements for AC mains or AC distribution networks
    • H02J2203/10—Power transmission or distribution systems management focussing at grid-level, e.g. load flow analysis, node profile computation, meshed network optimisation, active network management or spinning reserve management
    • 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
    • H02J2203/00—Indexing scheme relating to details of circuit arrangements for AC mains or AC distribution networks
    • H02J2203/20—Simulating, e g planning, reliability check, modelling or computer assisted design [CAD]
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E40/00—Technologies for an efficient electrical power generation, transmission or distribution
    • Y02E40/30—Reactive power compensation

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Theoretical Computer Science (AREA)
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  • Evolutionary Computation (AREA)
  • Geometry (AREA)
  • General Engineering & Computer Science (AREA)
  • General Physics & Mathematics (AREA)
  • Supply And Distribution Of Alternating Current (AREA)

Abstract

The invention belongs to the technical field of automatic voltage control of an electric power system, and provides an intelligent modeling method of a transformer substation in automatic voltage control, which comprises the following steps: setting modeling constraint conditions of automatic voltage control of a transformer substation; information of a transformer substation i is obtained from a platform power grid model and stored in an ST i set; generating a control model set DCTRL according to the ST i set and the modeling constraint conditions of the automatic voltage control of the transformer substation set in the step one; the control model set DCTRL is applied to automatic voltage control for control. According to the method, constraint conditions are generated according to the set model, a relevant transformer substation control equipment model, specific parameters and a plan curve are automatically generated through the power grid model when control is started, and the control model is applied in control, so that the manual maintenance workload and maintenance errors of the transformer substation model in the automatic voltage control process are reduced, the automatic voltage control level is improved, and the stability of the power system is improved.

Description

Intelligent modeling method for transformer substation in automatic voltage control
Technical Field
The invention belongs to the technical field of automatic voltage control of an electric power system, and particularly relates to an intelligent modeling method of a transformer substation in automatic voltage control.
Background
An automatic voltage control (AVC, automatic Voltage Control) system is an important means for realizing safe (improving voltage stability margin), economical (reducing network loss) and high-quality (improving voltage qualification rate) operation of a power grid. The AVC system is constructed on a power grid energy management system (hereinafter referred to as EMS) and can utilize real-time operation data of a power grid to scientifically decide an optimal reactive voltage adjustment scheme from the perspective of global optimization of the power grid, and automatically issue the optimal reactive voltage adjustment scheme to a transformer substation, a transformer substation and a subordinate power grid dispatching mechanism for execution. The AVC system takes voltage safety and high quality as constraint and system operation economy as a target, continuously performs real-time optimization control of voltage in a closed loop manner, realizes a whole set of analysis, decision-making, control, re-analysis, re-decision-making, re-control and the like of a reactive voltage coordination control scheme, and can effectively overcome the defects of the traditional power grid reactive voltage control means and improve the level of safe, stable and economic operation of the power grid.
Zheng Anjun, garden picture boat provides a multi-objective substation optimization control method in Beijing electric network automatic voltage control based on regulation and control integration (fourth (2010) national electric power system reactive power/voltage technology communication seminar discussion, 2010, western security, pages 120-125), and the main principle is that: and meanwhile, the voltage of a plurality of voltage class buses and the reactive power of the transformer in the transformer substation are used as control targets, and the optimal control of the transformer substation is realized through coordination among the plurality of control targets. Specific control targets include:
1) And the bus voltage is qualified. The transformer substation control firstly ensures that the bus voltage of each voltage class in the substation is qualified. When the bus voltage of each voltage class is actually unable to be ensured to be qualified due to the exhaustion of the control means, the bus voltage of the high level is preferentially ensured to be qualified according to the preset priority.
2) And the reactive power is reasonable. On the basis of qualified bus voltage, reactive power qualification of the high-voltage side winding of the transformer is considered.
3) And optimizing the voltage of the main network. And under the condition that the conditions of qualified voltage and reasonable reactive power can be met, the voltage optimization control of the bus of the main network is performed.
The method breaks through the limitation that only bus voltage of a certain voltage level in the substation is used as a control target in the traditional AVC control of the transformer substation, can realize that bus voltage of each voltage level in the transformer substation is qualified, and meets the operation requirement of a power grid. At present, the method is widely applied to a provincial power grid control center.
The master station part of the AVC system is an automatic voltage control method realized based on a software program in a power grid control center, and the control method for the transformer substation is a switching instruction for reactive compensation equipment and an adjusting instruction for an on-load voltage regulating tap of a transformer. The reactive equipment mainly comprises a capacitor and a reactor, and when the capacitor is put into operation or the reactor is cut off, the bus voltage rises; when the capacitor is cut off or the reactor is put into operation, the bus voltage decreases. The on-load voltage regulating tap of the transformer is generally arranged on a high-voltage side winding of the transformer, and when the tap gear is increased, the voltage of the medium-low voltage bus is increased, and otherwise, the voltage is decreased. The AVC master station issues instructions for switching in or switching out reactive equipment and tap lifting instructions, and an automatic monitoring system in the transformer substation completes switching in or adjusting of taps of the reactive equipment in the transformer substation according to the received instructions.
The master station part of the AVC system is an automatic voltage control method realized based on a software program in a power grid control center, corresponding models and parameters are needed for calculating equipment in a transformer substation, and the master station part of the AVC system at present is based on an offline manual maintenance model and parameters and comprises the equipment for building the transformer substation, controlling a bus, controlling a capacitive reactance, controlling a tap, controlling a main transformer and the like, and maintaining the parameters of the equipment. The process needs to set manual maintenance parameters and planning curves, and after manual offline maintenance is completed, a calculation program is read and then calculated, so that a large amount of workload and errors of parameter setting exist.
Disclosure of Invention
The invention aims to overcome the defects of the prior art, and provides an intelligent modeling method for a transformer substation in automatic voltage control, which can automatically generate a control model according to set model constraint conditions, reduce maintenance workload and avoid errors in maintenance.
The technical scheme adopted for solving the technical problems is as follows:
An intelligent modeling method of a transformer substation in automatic voltage control comprises the following steps:
step one, setting modeling constraint conditions of automatic voltage control of a transformer substation;
Step two, information of a transformer substation i is obtained from a platform power grid model and stored in an ST i set;
Step three, generating a control model set DCTRL according to the ST i set and the modeling constraint conditions of the automatic voltage control of the transformer substation set in the step one;
Step four, a control model set DCTRL is applied to automatic voltage control for control;
The platform power grid model comprises a plant station model, a main transformer model, a bus model, a capacitive reactance model and a tap model.
The step one of setting modeling constraint conditions of automatic voltage control of the transformer substation comprises the following constraint conditions according to voltage levels:
Modeling constraint conditions of a planned limit curve of the bus;
Controlling modeling constraint conditions of a main transformer power factor planning curve;
parameter modeling constraint conditions of the controlled transformer substation;
parameter modeling constraint conditions of the controlled bus;
parameter modeling constraint conditions of the controlled capacitor and the reactor;
parameter modeling constraints for controlled taps;
parameter modeling constraint conditions of the controlled main transformer.
Further, the method comprises the steps of,
The planning limit value curve modeling constraint condition of the bus is that default planning curves BSCR of each voltage level are respectively set to form a planning curve set, wherein the default planning curves BSCR of each voltage level comprise a planning upper limit set, a planning lower limit set and a default value set;
the control main power factor plan curve modeling constraint condition is to set a default plan curve BSCRxf of the control main, and add the default plan curve BSCRxf of the control main to the default plan curves BSCR of the voltage levels, wherein the default plan curve BSCRxf of the control main comprises a main power factor plan upper limit set, a main power factor plan lower limit set and a main power factor default value set.
The parameter modeling constraint condition set of the controlled substation is as follows: Wherein the method comprises the steps of
V i st represents the voltage class of the station where the substation is located;
the parameter modeling constraint conditions of the controlled bus are as follows: Wherein the method comprises the steps of
V i pbs represents the voltage level at which the controlled bus is located;
The parameter modeling constraint conditions of the controlled capacitor and the reactor are as follows: Wherein the method comprises the steps of V i cp represents the voltage class at which the capacitive reactor is located;
The parameter modeling constraint conditions of the controlled tap are: Wherein the method comprises the steps of
V i oltc denotes the voltage level at which the control tap is located;
the parameter modeling constraint conditions of the controlled main transformer are as follows: Wherein the method comprises the steps of
V i trfm denotes the voltage level at which the high-voltage side of the main transformer is controlled;
I is the number of constraint conditions, J is the number of device parameters, type is the parameter type, and the value range comprises: 0 integer, 1 long integer, 2 floating point number, 3 character string; code is the variable name; name is a variable description; value is a numerical value.
Further, the procedure of the second step is as follows:
Acquiring a record S i of a current transformer substation i from a plant station model, and storing S i into a ST i set to form ST i＝{Si;
Acquiring a main transformer belonging to a current transformer substation i from a main transformer model, wherein the main transformer is recorded as TR= { TRj, j=1, …, n1}, n1 is all main variable numbers contained in the current transformer substation i, and storing TR into a ST i set to form ST i＝{Si, TR };
obtaining buses belonging to a current transformer substation i from a bus model, wherein the buses are recorded as BS= { BSj, j=1, …, n2}, n2 is the number of all buses contained by the current transformer substation i, and storing the BS into a ST i set to form ST i＝{Si, TR and BS };
Obtaining the capacitive reactance belonging to the current transformer substation i from the capacitive reactance model, wherein the capacitive reactance is recorded as CP= { CPj, j=1, …, n3}, n3 is the number of all capacitive reactance contained by the current transformer substation i, and the CPs are stored in a ST i set to form ST i＝{Si, TR, BS and CP };
Taps belonging to the current substation i are obtained from the tap model and are denoted as ol= { OLj, j=1, …, n4}, n4 is the number of all taps contained by the current substation i, and OL is stored in the set of ST i to form ST i＝{Si, TR, BS, CP, OL }.
Further, the procedure of the third step is as follows:
according to the record S i of the transformer substation i in the transformer substation set ST i＝{Si, TR, BS, CP, OL generated in the second step, traversing S i to generate a control transformer substation parameter model in a transformer substation control model And generating a parameter model/>, of a control transformer substation in a transformer substation control model, from the parameter modeling constraint condition R st of the controlled transformer substation according to the parameter modeling constraint condition R st of the controlled transformer substation through the voltage level of the current transformer substationAnd/>Adding the model to a control model set DCTRL to form/>
According to the main transformer TR in the transformer substation set ST i＝{Si, TR, BS, CP, OL generated in the second step, traversing the TR to generate a control main transformer in a transformer substation control modelAnd generating a parameter model/>, of the controlled main transformer, in the substation control model from the parameter modeling constraint conditions R trfm of the controlled main transformer according to the parameter modeling constraint conditions R trfm of the controlled main transformer through the voltage level of the current main transformerAccording to the planning curve set BSCR= { BSCR500, BSCR220, BSCR110, BSCR35, BSCR10}, the main transformer power factor set curve BSCM base under the corresponding voltage level is obtained from the planning curve set through the voltage level of the current main transformer, and is added to the parameter model for controlling the main transformerIn, form/>And/>Adding the control main transformer set CTR to formAfter traversing TR is completed, form/>Jn is the number of main transformers, and CTR is added to the control model set DCTRL to form/>
Traversing the BS according to the buses BS in the substation collection ST i＝{Si, TR, BS, CP, OL generated in the second step to generate control buses in a substation control modelGenerating a parameter model/>, of a control bus in a substation control model, from the parameter modeling constraint condition R pbs of the controlled bus according to the parameter modeling constraint condition R pbs of the controlled bus through the voltage level of the current busAccording to a plan curve set BSCR= { BSCR500, BSCR220, BSCR110, BSCR35, BSCR10}, wherein BSCR500 is a default plan curve of 500kV voltage level, BSCR220 is a default plan curve of 220kV voltage level, BSCR110 is a default plan curve of 110kV voltage level, BSCR35 is a default plan curve of 35kV voltage level, BSCR10 is a default plan curve of 10kV voltage level, a bus plan set curve BSCM base under the corresponding voltage level is obtained from the plan curve set through the voltage level of the current bus, and is added to a parameter model/>, of the control busIn, form/>And/>Added into the control busbar assembly PBS to form/>After traversing BS, form/>Jn is the number of control buses and PBS is added to the control model set DCTRL to form/>
Traversing the CPs according to the capacitive reactance CPs in the transformer substation set generated in the step two to generate control capacitive reactance in a transformer substation control modelAccording to the parameter modeling constraint conditions R cp of the controlled capacitor and the reactor, a parameter model/>, of the control capacitance reactance in the transformer substation control model, is generated from the parameter modeling constraint conditions R cp of the controlled capacitor and the reactor through the voltage level of the current capacitance reactanceAnd/>Added to the control capacitance reactance set CCP to formAfter traversing CP, form/>Jn is the number of control capacitive reactance and CCP is added to the control model set DCTRL to form/>
Generating control taps OL j＝{OLi j in a substation control model from taps OL in the substation collection ST i＝{Si, TR, BS, CP, OL generated in step two, traversing OL, and generating a parameter model of a control tap in the substation control model from the parameter modeling constraints R oltc of the controlled tap by the voltage class of the current tap from the parameter modeling constraints R oltc of the controlled tapAnd/>Added to the control tap set OLTC to form/>After traversing OL is completed, form/>Jn is the number of control taps and OLTC is added to the control model set DCTRL to form/>The generated control model/>, of the current transformer substation iAnd adding the control model set DCTRL to form DCTRL= { DCTRL i }.
The invention has the advantages and positive effects that:
According to the method, constraint conditions are generated according to the set model, a relevant transformer substation control equipment model, specific parameters and a plan curve are automatically generated through the power grid model when control is started, and the control model is applied in control, so that the manual maintenance workload and maintenance errors of the transformer substation model in the automatic voltage control process are reduced, the automatic voltage control level is improved, and the stability of the power system is improved.
Drawings
FIG. 1 is a flow chart of the method of the present invention.
Detailed Description
The invention is further illustrated by the following examples, which are intended to be illustrative only and not limiting in any way.
An intelligent modeling method of a transformer substation in automatic voltage control, as shown in fig. 1, comprises the following steps:
S1, setting modeling constraint conditions of automatic voltage control of a transformer substation;
S2, information of a transformer substation i is obtained from a platform power grid model and stored in an ST i set;
S3, generating a control model set DCTRL according to the ST i set and the modeling constraint conditions of the automatic voltage control of the transformer substation set in the S1;
s4, applying the control model set DCTRL to automatic voltage control for control;
The platform power grid model comprises a plant station model, a main transformer model, a bus model, a capacitive reactance model and a tap model.
The plant station model, the main transformer model, the bus model, the capacitive reactance model and the tap model respectively refer to corresponding table data in the power grid CIM model;
In the CIM model of IEC 61970 series standard (hereinafter referred to as standard), a class 2 object is mainly set for describing the devices that constitute the power grid and the interconnection relationship thereof: a conductive device (Conducting Equipment) and a junction (Connective Node), which are briefly described below.
1. An electrically conductive device (Conducting Equipment).
The conductive equipment corresponds to specific physical equipment in the power grid, and the following physical equipment is further derived from the conductive equipment class object: the power transmission line (ACLINE SEGMENT), the transformer winding (Transformer Winding), the bus (Busbarsection). For transformers, in order to describe two-winding or three-winding transformers, a transformer class (Power Transformer) is provided in the standard. In a specific model example, 1 transformer object includes 2 or 3 transformer winding class objects.
Meanwhile, in order to describe the connection of the device outside, a Terminal (Terminal) class is set in the standard pair, and the attribute of the device Terminal is added to the conductive device, and the Terminal of the device is described: the transmission line has two terminals, the transformer winding has one terminal, and the bus bar has one terminal.
In the CIM model example, a typical way of describing an AC line model record is as follows:
Wherein < cim: ACLINESEGMENT indicates that a line is described, rdfID is a number for uniquely identifying an object in a grid model, and the following < cim: ACLINESEGMENT > indicates that an ac line object description is completed. The middle of these 2 lines is the part describing the ac line properties. Wherein the attribute "Naming. Name" indicates the name of the line; the successive 2 rows "connectingequipment.terminals" describe 2 terminals at the head and tail ends of the line, giving "rdfID" corresponding to the 2 terminals, respectively, and a description of specific 2 Terminal objects can be found by "rdfID", i.e., the section of "</cim: terminal > … </cim: terminal >".
In the CIM model example, a transformer model is typically described as follows:
It is described that 1 transformer (PowerTransformer) includes 2 transformer windings (TransformerWinding), the voltage levels (attribute "< cim: transforming winding ratedkv >") of the 2 windings are 110 and 35kV, respectively, and each winding contains 1 Terminal (Terminal).
In the CIM model example, a typical way of describing a busbar model record is as follows:
Nodes (ConnectiveNode).
In order to describe the connection relationship between the conductive devices, a node (Connective Node) class is introduced in the standard, and a node attribute (Terminal ConnectivityNode) to which it belongs is introduced in the Terminal (Terminal) class. The node attribute values to which the plurality of terminals belong may be the same, i.e. indicate that the terminals are connected together, i.e. indicate that the devices to which the terminals belong are connected together.
For example, in the CIM model of the above example, a node is described as follows:
<cim:ConnectivityNode rdfID＝"3377701543477256">
<cim:Naming.name>195</cim:Naming.name>
</cim:ConnectivityNode>
Note that of the three conductive devices of the lines "ac line #1", "two-winding transformers #1-110kV winding", "110kV busbar #1", given in 1), the "rdfID" of the junction to which one terminal belongs is the same "3377701543477256", which means that the "ac line #1" and "two-winding transformers #1-110kV winding" 2 devices are connected to the busbar "110kV busbar # 1".
The S1 is used for setting modeling constraint conditions of automatic voltage control of a transformer substation, and the process is as follows:
And setting planned limit curve modeling constraint conditions of the bus in automatic voltage control according to the voltage grade. The method comprises the following specific steps:
Setting a default planning curve BSCR 500= { max500, min500, def500} of a 500kV voltage level to be added into a planning curve set BSCR, wherein max500 is a planning upper limit set, min500 is a planning lower limit set, and def500 is a default value set; default planning curve BSCR 220= { max220, min220, def220} set for a voltage class of 220kV is added to the planning curve set BSCR in a similar way; a default planning curve bscr110= { max110, min110, def110} set at 110kV voltage level is added to the planning curve set BSCR; setting a default planning curve BSCR 35= { max35, min35, def35} of a 35kV voltage level to be added into a planning curve set BSCR; a default planning curve bscr10= { max10, min10, def10} set at a voltage level of 10kV is added to the planning curve set BSCR;
Finally form a planning curve set
BSCR＝{BSCR500,BSCR220,BSCR110,BSCR35,BSCR10}。
And setting and controlling modeling constraint conditions of a main transformer power factor planning curve according to the voltage level, wherein the modeling constraint conditions comprise the following specific steps:
Setting a default planning curve BSCRxf = { maxcos, mincos, defcos } for controlling the main transformer to be added to the planning curve set BSCR; maxcos is a main power factor plan upper limit set, mincos is a main power factor plan lower limit set, and defcos is a main power factor default value set; the final set of planning curves bscr= { BSCR500, BSCR220, BSCR110, BSCR35, BSCR10, BSCRxf }.
Parameter modeling constraint conditions of a controlled transformer substation in automatic voltage control of the transformer substation are set according to voltage levels, and the method comprises the following specific steps:
Setting a parameter modeling constraint condition set of a controlled transformer substation in automatic voltage control of the transformer substation as I is the number of constraint conditions; each constraint is set as: /(I)J is the number of parameters of equipment, wherein V i st represents the voltage level of a station where the transformer substation is located, and the value range is 1000 kV-35 kV, namely, modeling the transformer substation under the voltage level by adopting the J parameters;
the settings for each parameter constraint were:
wherein: type is a parameter type, and the value range comprises: 0 integer, 1 long integer, 2 floating point number, 3 character string; code is the variable name; name is a variable description; value is a numerical value;
for a controlled substation model in automatic voltage control of a substation, settable Para includes:
TABLE 1
type code name
Integer number type_st Control type of plant station
Integer number tmlk_st Whether or not to lock according to time period
Integer number range_st Station control authority group
Integer number almrnk_st Alarm level
Integer number th0ed_st The peak time 1 ends
Integer number th0st_st Peak time 1 initiation
Integer number th1st_st Peak time 2 onset
Integer number th1ed_st The peak period 2 ends
Integer number tl0st_st Trough period 1 onset
Integer number tl0ed_st The off-valley period 1 ends
Integer number tl1st_st Trough period 2 onset
Integer number tl1ed_st The off-valley period 2 ends
Integer number qclk_st Equidirectional reactive power regulation lockout minute
Integer number qdlk_st Reverse reactive power regulation lockout minute
Integer number strgtp_st Control policy type
Integer number strgtph_st Peak control strategy type
Integer number strgtpl_st Off-valley control policy type
Integer number strgtpp_st Flat peak control strategy type
Integer number pwrtp_st Station resource type
Integer number mxruncp_st The maximum number of capacitors simultaneously put into the factory station
Integer number mxruncx_st The number of reactors which are simultaneously put into the factory station at most
Integer number oltcfirst_st Whether low-voltage out-of-limit is preferred to adjust the dividing head
Integer number ctlwaittm_st Waiting for the time for the control result to return
Integer number cmbstrgtp_st Combining policy types
Integer number deadtm_st Threshold value of voltage non-refresh latch-up control
Integer number repsprv_st Whether low voltage stations participate in provincial and regional coordination
Parameter modeling constraint conditions of a controlled bus in automatic voltage control of a transformer substation are set according to voltage levels, and the method comprises the following specific steps:
Parameter modeling constraint condition set of controlled bus in automatic voltage control of transformer substation is set as I is the number of constraint conditions; each constraint is set as: /(I)J is the number of parameters of the equipment, wherein V i pbs represents the voltage level of the controlled bus, the value range is 1000 kV-35 kV, namely, modeling the bus under the voltage level by adopting the J parameters;
the settings for each parameter constraint were:
wherein: type is a parameter type, and the value range comprises: 0 integer, 1 long integer, 2 floating point number, 3 character string; code is the variable name; name is a variable description; value is a numerical value;
For a controlled capacitance, reactor model, settable Para includes:
TABLE 2
Parameter modeling constraint conditions of a controlled capacitor and a reactor in automatic voltage control of a transformer substation are set according to voltage levels, and the method comprises the following specific steps:
Parameter modeling constraint condition set of controlled capacitor and reactor in automatic voltage control of transformer substation is set as I is the number of constraint conditions; each constraint is set as: /(I)J is the number of equipment parameters, wherein V i cp represents the voltage level of a capacitor reactor, the value range is 1000 kV-35 kV, namely the modeling of the low-voltage side capacitor of the main transformer in the transformer substation under the voltage level and the reactor by adopting the J parameters;
the settings for each parameter constraint were:
wherein: type is a parameter type, and the value range comprises: 0 integer, 1 long integer, 2 floating point number, 3 character string; code is the variable name; name is a variable description; value is a numerical value;
For a controlled capacitance, reactor model, settable Para includes:
TABLE 3 Table 3
Parameter modeling constraint conditions of controlled taps in automatic voltage control of a transformer substation are set according to voltage levels, and the method comprises the following specific steps:
Setting parameter modeling constraint condition set of controlled tap in automatic voltage control of transformer substation as I is the number of constraint conditions; each constraint is set as: /(I)J is the number of parameters of the equipment, wherein V i oltc represents the voltage level of the control tap, the value range is 1000 kV-35 kV, namely, modeling of the main transformer tap in the transformer substation under the voltage level by adopting the following J parameters;
the settings for each parameter constraint were:
wherein: type is a parameter type, and the value range comprises: 0 integer, 1 long integer, 2 floating point number, 3 character string; code is the variable name; name is a variable description; value is a numerical value;
For a controlled tap model, settable Para includes:
TABLE 4 Table 4
type code name
Integer number mxop_oltc Maximum number of times of day adjustment
Integer number mxhop_oltc Peak adjustment maximum times of the first day
Integer number uplst_oltc Duration of the split upshift
Integer number dnlst_oltc Duration of the split downshift minimum time
Integer number type_oltc Type of split control
Integer number almrnk_oltc Alarm level
Integer number sentype_oltc Type of voltage sensitivity
Floating point number senml_oltc Sensitivity to low voltage artificial voltage
Floating point number senmm_oltc Sensitivity to medium voltage artificial voltage
Floating point number senmh_oltc Sensitivity to high voltage artificial voltage
Integer number haccnt_oltc Times of day peak time action
Integer number laccnt_oltc Times of action in off-peak period of the day
Parameter modeling constraint conditions of a controlled main transformer in automatic voltage control of a transformer substation are set according to voltage levels, and the method comprises the following specific steps:
Setting a parameter modeling constraint condition set of a controlled main transformer in automatic voltage control of a transformer substation as I is the number of constraint conditions; each constraint is set as: /(I)J is the number of parameters of the equipment, wherein V i trfm represents the voltage level of the high-voltage side of the control main transformer, and the value range is 1000 kV-35 kV, namely the modeling of the main transformer in the transformer substation under the voltage level by adopting the J parameters;
the settings for each parameter constraint were:
wherein: type is a parameter type, and the value range comprises: 0 integer, 1 long integer, 2 floating point number, 3 character string; code is the variable name; name is a variable description; value is a numerical value;
For a controlled main transformer model, settable Para includes:
and S2, reading a platform power grid model, traversing a transformer substation, and generating a set of information ST i of the transformer substation i, wherein the process is as follows:
(2-1) acquiring a record S i of a current transformer substation i from a plant station model of the power grid model, and storing S i into a ST i set to form ST i＝{Si;
(2-2) acquiring a main transformer belonging to the current transformer substation i in a main transformer model of the power grid model, wherein the main transformer is recorded as TR= { TRj, j=1, …, n1}, n1 is all main variables contained in the current transformer substation i, and the TR is stored in a ST i set to form ST i＝{Si,TR };
(2-3) obtaining buses belonging to the current transformer substation i in a bus model of the power grid model, wherein the buses are recorded as bs= { BSj, j=1, …, n2}, n2 is the number of all buses contained in the current transformer substation i, and storing the BSs into a STi set to form ST i＝{Si, TR and BS };
(2-4) in the capacitive reactance model of the power grid model, acquiring capacitive reactance belonging to the current transformer substation i, and recording the capacitive reactance as CP= { CPj, j=1, …, n3}, wherein n3 is the number of all capacitive reactance contained in the current transformer substation i, and storing the CP into the STi set to form ST i＝{Si, TR, BS and CP };
(2-5) obtaining taps belonging to the current transformer substation i in a tap model of the power grid model, wherein the taps are denoted as OL= { OLj, j=1, …, n4}, n4 is the number of all taps contained in the current transformer substation i, and storing OL into a STi set to form ST i＝{Si, TR, BS, CP, OL };
The step S3 is a process of generating a control model set DCTRL according to the modeling constraint conditions of the automatic voltage control of the transformer substation set in the step ST i set, wherein the process is as follows:
(3-1) traversing the substation collection ST i generated in the step (2) to obtain a current i substation ST i;
(3-2) generating a control substation in the substation control model from the record S i of the substation i in the substation collection ST i＝{Si, TR, BS, CP, OL generated in (2) (Reading model data such as corresponding name types through the Si record data of the transformer substation, simultaneously forming a transformer substation record according to the corresponding parameter matching according to the parameter regulation, adding the transformer substation record into a control transformer substation set), and generating a parameter model/> of a control transformer substation in a transformer substation control model from the parameter modeling constraint condition R st of the controlled transformer substation according to the parameter modeling constraint condition R st of the controlled transformer substation through the voltage level of the current transformer substationAnd/>Adding the model to a control model set DCTRL to form/>
(3-3) Traversing TR according to the main transformer TR in the substation set ST i＝{Si, TR, BS, CP, OL generated in (2), and generating a control main transformer in the substation control modelAnd generating a parameter model/>, of the controlled main transformer, in the substation control model from the parameter modeling constraint conditions R trfm of the controlled main transformer according to the parameter modeling constraint conditions R trfm of the controlled main transformer through the voltage level of the current main transformerFrom a set of planned curves
Bscr= { BSCR500, BSCR220, BSCR110, BSCR35, BSCR10}, and obtaining a main transformer power factor set curve BSCM base under the corresponding voltage level from a planning curve set through the voltage level of the current main transformer, and adding the main transformer power factor set curve BSCM base to the parameter model for controlling the main transformerIn, form/>And/>Added into the control main transformer set CTR to form/>After traversing TR is completed, form/>Jn is the number of main transformers, and CTR is added to the control model set DCTRL to form/>
(3-4) Generating control buses in the substation control model according to the buses BS in the substation collection ST i＝{Si, TR, BS, CP, OL generated in (2), traversing the BSGenerating a parameter model/>, of a control bus in a substation control model, from the parameter modeling constraint condition R pbs of the controlled bus according to the parameter modeling constraint condition R pbs of the controlled bus through the voltage level of the current busFrom a set of planned curves
Bscr= { BSCR500, BSCR220, BSCR110, BSCR35, BSCR10}, wherein BSCR500 is a default plan curve of 500kV voltage level, BSCR220 is a default plan curve of 220kV voltage level, BSCR110 is a default plan curve of 110kV voltage level, BSCR35 is a default plan curve of 35kV voltage level, BSCR10 is a default plan curve of 10kV voltage level, and bus plan set curve BSCM base under the corresponding voltage level is obtained from the plan set by the voltage level of the current bus and added to the parametric model of the control busIn (1) formAnd/>Added into the control busbar assembly PBS to form/>After traversing BS, form/>Jn is the number of control buses and PBS is added to the control model set DCTRL to form/>
(3-5) Traversing the CP according to the capacitive reactance CP in the substation set generated in the step (2) to generate a control capacitive reactance in a substation control modelAccording to the parameter modeling constraint conditions R cp of the controlled capacitor and the reactor, a parameter model/>, of the control capacitance reactance in the transformer substation control model, is generated from the parameter modeling constraint conditions R cp of the controlled capacitor and the reactor through the voltage level of the current capacitance reactanceAnd/>Added to the control capacitance set CCP to form/>After traversing CP, form/>Jn is the number of control capacitive reactance and CCP is added to the control model set DCTRL to form
(3-6) Generating control taps OL j＝{OLi j in the substation control model from taps OL in the substation collection ST i＝{Si, TR, BS, CP, OL generated in (2), traversing OL, and generating a parameter model of a control tap in the substation control model from the parameter modeling constraints of controlled taps R oltc by the voltage level of the current tap according to the parameter modeling constraints of controlled taps R oltc And/>Added to the control tap set OLTC to form/>After traversing OL is completed, form/>Jn is the number of control taps and OLTC is added to the control model set DCTRL to form
(3-7) Generating a control model of the current substation i
Added to the set DCTRL to form dctrl= { DCTRL i }.
The step S4 is to temporarily apply DCTRL to automatic voltage control according to the step (3) of generating a transformer substation control model set
Dctrl= { DCTRL 0,DCTRL1,...,DCTRLk }, k being the number of plant stations currently forming the control model; DCTRL is temporarily applied to the automatic voltage control for control every control period.
The foregoing is merely a preferred embodiment of the present invention, and it should be noted that it will be apparent to those skilled in the art that variations and modifications can be made without departing from the scope of the invention.

Claims (3)

1. An intelligent modeling method of a transformer substation in automatic voltage control is characterized by comprising the following steps of: the method comprises the following steps:
step one, setting modeling constraint conditions of automatic voltage control of a transformer substation;
Step two, information of a transformer substation i is obtained from a platform power grid model and stored in an ST i set;
Step three, generating a control model set DCTRL according to the ST i set and the modeling constraint conditions of the automatic voltage control of the transformer substation set in the step one;
Step four, a control model set DCTRL is applied to automatic voltage control for control;
The platform power grid model comprises a plant station model, a main transformer model, a bus model, a capacitive reactance model and a tap model;
Setting modeling constraint conditions of automatic voltage control of a transformer substation comprises the following constraint conditions according to voltage levels:
Modeling constraint conditions of a planned limit curve of the bus;
Controlling modeling constraint conditions of a main transformer power factor planning curve;
parameter modeling constraint conditions of the controlled transformer substation;
parameter modeling constraint conditions of the controlled bus;
parameter modeling constraint conditions of the controlled capacitor and the reactor;
parameter modeling constraints for controlled taps;
parameter modeling constraint conditions of the controlled main transformer;
the planning limit value curve modeling constraint condition of the bus is that default planning curves BSCR of each voltage level are respectively set to form a planning curve set, wherein the default planning curves BSCR of each voltage level comprise a planning upper limit set, a planning lower limit set and a default value set;
The modeling constraint condition of the control main power factor planning curve is to set a default planning curve BSCRxf of the control main power factor, and add the default planning curve BSCRxf of the control main power factor to the default planning curve BSCR of each voltage level, wherein the default planning curve BSCRxf of the control main power factor comprises a main power factor planning upper limit set, a main power factor planning lower limit set and a main power factor default value set;
The parameter modeling constraint conditions of the controlled transformer substation are as follows: Wherein the method comprises the steps of
V i st represents the voltage class of the station where the substation is located;
the parameter modeling constraint conditions of the controlled bus are as follows: Wherein the method comprises the steps of
V i pbs represents the voltage level at which the controlled bus is located;
The parameter modeling constraint conditions of the controlled capacitor and the reactor are as follows: Wherein the method comprises the steps of
V i cp represents the voltage class at which the capacitive reactor is located;
The parameter modeling constraint conditions of the controlled tap are: Wherein the method comprises the steps of
V i oltc denotes the voltage level at which the control tap is located;
the parameter modeling constraint conditions of the controlled main transformer are as follows: Wherein the method comprises the steps of
V i trfm denotes the voltage level at which the high-voltage side of the main transformer is controlled;
I is the number of constraint conditions, J is the number of device parameters, type is the parameter type, and the value range comprises: 0 integer, 1 long integer, 2 floating point number, 3 character string; code is the variable name; name is a variable description; value is a numerical value.
2. The method according to claim 1, characterized in that: the process of the second step is as follows:
Acquiring a record S i of a current transformer substation i from a plant station model, and storing S i into a ST i set to form ST i＝{Si;
Acquiring a main transformer belonging to a current transformer substation i from a main transformer model, wherein the main transformer is recorded as TR= { TRj, j=1,.. N1}, n1 is all main variable numbers contained in the current transformer substation i, and storing TR into a ST i set to form ST i＝{Si, TR };
Obtaining buses belonging to a current transformer substation i from a bus model, and recording the buses as BS= { BSj, j=1, & gt, n2}, wherein n2 is the number of all buses contained in the current transformer substation i, and storing the BS into a ST i set to form ST i＝{Si, TR and BS };
Obtaining the capacitive reactance belonging to the current transformer substation i from the capacitive reactance model, and recording the capacitive reactance as CP= { CPj, j=1,.. The n3}, wherein n3 is the number of all capacitive reactance contained by the current transformer substation i, and storing the CPs into a ST i set to form ST i＝{Si, TR, BS and CP };
Taps belonging to the current substation i are obtained from the tap model and denoted as ol= { OLj, j=1,..4, n4 is the number of all taps comprised by the current substation i, and OL is stored in the set ST i, forming ST i＝{Si, TR, BS, CP, OL.
3. The method according to claim 2, characterized in that: the process of the third step is as follows:
according to the record S i of the transformer substation i in the transformer substation set ST i＝{Si, TR, BS, CP, OL generated in the second step, traversing S i to generate a control transformer substation parameter model in a transformer substation control model And generating a parameter model/>, of a control transformer substation in a transformer substation control model, from the parameter modeling constraint condition R st of the controlled transformer substation according to the parameter modeling constraint condition R st of the controlled transformer substation through the voltage level of the current transformer substationAnd/>Adding the model to a control model set DCTRL to form/>
According to the main transformer TR in the transformer substation set ST i＝{Si, TR, BS, CP, OL generated in the second step, traversing the TR to generate a control main transformer in a transformer substation control modelAnd generating a parameter model/>, of the controlled main transformer, in the substation control model from the parameter modeling constraint conditions R trfm of the controlled main transformer according to the parameter modeling constraint conditions R trfm of the controlled main transformer through the voltage level of the current main transformerAccording to the plan curve set BSCR= { BSCR500, BSCR220, BSCR110, BSCR35, BSCR10}, obtaining a main transformer power factor set curve BSCM base under the corresponding voltage level from the plan curve set through the voltage level of the current main transformer, and adding the main transformer power factor set curve BSCM base into the parameter model/>, which controls the main transformerIn, form/>And/>Adding the control main transformer set CTR to formAfter traversing TR is completed, form/>Jn is the number of main transformers, and CTR is added to the control model set DCTRL to form/>
Traversing the BS according to the buses BS in the substation collection ST i＝{Si, TR, BS, CP, OL generated in the second step to generate control buses in a substation control modelGenerating a parameter model/>, of a control bus in a substation control model, from the parameter modeling constraint condition R pbs of the controlled bus according to the parameter modeling constraint condition R pbs of the controlled bus through the voltage level of the current busAccording to a plan curve set BSCR= { BSCR500, BSCR220, BSCR110, BSCR35, BSCR10}, wherein BSCR500 is a default plan curve of 500kV voltage level, BSCR220 is a default plan curve of 220kV voltage level, BSCR110 is a default plan curve of 110kV voltage level, BSCR35 is a default plan curve of 35kV voltage level, BSCR10 is a default plan curve of 10kV voltage level, a bus plan set curve BSCM base under the corresponding voltage level is obtained from the plan curve set through the voltage level of the current bus, and is added to a parameter model/>, of the control busIn, form/>And/>Added into the control busbar assembly PBS to form/>After traversing BS, form/>Jn is the number of control buses and PBS is added to the control model set DCTRL to form/>
Traversing the CPs according to the capacitive reactance CPs in the transformer substation set generated in the step two to generate control capacitive reactance in a transformer substation control modelAccording to the parameter modeling constraint conditions R cp of the controlled capacitor and the reactor, a parameter model/>, of the control capacitance reactance in the transformer substation control model, is generated from the parameter modeling constraint conditions R cp of the controlled capacitor and the reactor through the voltage level of the current capacitance reactanceAnd/>Added to the control capacitance reactance set CCP to formAfter traversing CP, form/>Jn is the number of control capacitive reactance and CCP is added to the control model set DCTRL to form/>
Generating control taps in a substation control model according to taps OL in the substation set ST i＝{Si, TR, BS, CP, OL generated in the second step and traversing OLAnd generating a parametric model/>, of a control tap in a substation control model, from the parametric modeling constraint R oltc of the controlled tap, by the voltage class of the current tap, according to the parametric modeling constraint R oltc of the controlled tapAnd/>Added to the control tap set OLTC to form/>After traversing OL is completed, form/>Jn is the number of control taps and OLTC is added to the control model set DCTRL to form
The generated control model of the current transformer substation iAnd adding the control model set DCTRL to form DCTRL= { DCTRL i }.
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