CN103149847A - Reactive voltage control efficiency detecting method based on real time digital system (RTDS) - Google Patents
Reactive voltage control efficiency detecting method based on real time digital system (RTDS) Download PDFInfo
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Abstract
The invention relates to a constructing method for an AVC soft simulating closed-loop system based on a real time digital system (RTDS). The detecting method comprises a model, a data input and output interface program and a reactive voltage control efficiency detecting program package. The model comprises a closed-loop system platform model and a central control system model, the system platform model and the central control system model are constructed by an RTDS power and operation system element to simulate a real system, and the data input and output interface program achieves real time data acquisition and control strategy return executing. The reactive voltage control efficiency detecting program package performs reactive optimizing calculation on the system to obtain an optimizing control strategy. The detecting method achieves the aim of control efficiency detection of an existing regional power grid AVC system.
Description
Technical field
The present invention relates to a kind of reactive power/voltage control efficient detection method based on RTDS for the area power grid automatic voltage control system, relate in particular to a kind of building method of the AVC soft simulation closed-loop system platform based on RTDS and the reactive power/voltage control efficient detection method of utilizing this closed-loop system platform.
Background technology
In recent ten years, Voltage-stabilizing Problems becomes the focus that electric system is paid close attention to day by day.In modern power network, because the unify load of long transmission line of weak pattern increases the weight of, the transmission capacity of electrical network is more and more near its limit, thereby makes the stable problem of voltage more outstanding.Some large power grid accidents are also mainly because spread of voltage causes.Studies show that; the reason that causes spread of voltage is many-sided: load increase, generator or line fault, System Reactive Power is not enough, lack between ULTC action and various control and protection and coordinate etc., and load lacks enough idle (especially dynamic reactive) and supports it is the main cause that causes spread of voltage.The idle method of operation of formulating electric system is the routine work of electrical networks at different levels, and along with the expanding day of electric system, the method for operation of electrical network becomes increasingly complex, and the problem that needs to consider also gets more and more.But the existing powerless control system of considerable part area power grid is arranged, the complete detection through detection platform does not namely put into operation, for the result that obtains comparatively being satisfied with, the operations staff often needs repeated multiple times trial to adjust parameter, sometimes expend plenty of time and energy and also be difficult to obtain satisfied optimum results, up to now, also there is no a kind of good idle opertaing device networking detection means.Therefore, how effectively selecting the Voltage Automatic Control System (AVC) of adaptable area electrical network characteristic is present each large Utilities Electric Co. urgent problem.Whether the detection that networks before the AVC system formally accesses electrical network can effectively be controlled local reactive voltage method of operation to it and assess, and has the urgency of height and important realistic meaning.
The RTDS full name is real-timedigital simulation instrument (Real Time Digital Simulator), is made by the exploitation of Canadian Manitoba RTDS company, is the device that a kind of specialized designs is used for research electric system Transient Electromagnetic Phenomena.At present.RTDS has been widely used in electric power enterprise and the research institution of 28 countries (area), and installation quantity is over 140.
Summary of the invention
The object of the present invention is to provide a kind of building method of the AVC soft simulation closed-loop system platform based on RTDS and the reactive power/voltage control efficient detection method of utilizing this closed-loop system platform, solve and accurately to detect the problem whether it can effectively control the local reactive voltage method of operation before present AVC system formally accesses electrical network.
For solving above-mentioned technical matters, the present invention by the following technical solutions:
A kind of building method of the AVC soft simulation closed-loop system platform based on RTDS comprises following steps:
The first step; Build the system platform model; Local power net is transferred in the text selecting somewhere, builds the primary system model in the RTDS system, comprises generator model, circuit model, three windings/two-winding transformer model, load model, capacitor model, reactor model in the primary system model;
Second step: build control system model, comprise that mainly the system losses that all are kept in model file are calculated the control model, the load tap changer gear is regulated and controlled model, electric capacity/Reactor banks switching control model, and all comprise control object, the control operation of carrying out corresponding to described control object and/or control accordingly configuration parameter;
The 3rd step: the display interface of building the operational system model; Described display interface is used for showing the running status of described system platform model, busbar voltage, the circuit when running status comprises system's operation be meritorious/reactive power, circuit active loss, each winding of transformer be meritorious/and the state of reactive power, transformer active power loss, system's active loss, load tap changer range state, electric capacity/reactor switching;
The 4th step: the gauge tap of building the operational system model; Described gauge tap can regulate and control load tap changer gear and electric capacity/reactor fling-cut switch, the by-pass cock, the electric capacity/reactor fling-cut switch that comprise the load tap changer gear, and the idle work optimization steering order data that receive the output of User Defined data input/output routine;
The 5th step: write the data input/output interface program; The collection and text output, the idle work optimization control strategy data that comprise user interface, the demonstration of reactive Voltage Optimum analysis result, real time data regulate and control four modules.User interface mainly points out the user to call the idle work optimization compute package, utilizes the interface program of MATLAB to realize; The demonstration of reactive Voltage Optimum analysis result is mainly that the result before and after idle work optimization is compared, and utilizes the interface program of MATLAB to realize; The collection of real time data and text output be mainly the real time data of Real-time Collection moving model and deposit in corresponding text, utilizes the script that the RTDS system provides to realize; Idle work optimization control strategy data regulation and control are mainly to be optimized adjusting according to the switch that the reactive Voltage Optimum control strategy that obtains is regulated moving model, utilize the script that the RTDS system provides to realize;
The 6th step: write reactive power/voltage control efficient trace routine; The text of real time data and rack data file as the source document of idle work optimization compute package, are carried out idle work optimization and calculated.Online idle work optimization compute package is that the characteristics that combine the operation of actual automatism voltage control AVC system are write, and has considered network loss target, the constraint of critical point power rate, the constraint of action number of equipment action, calculates the reactive Voltage Optimum control strategy.
A kind of reactive power/voltage control efficient detection method based on RTDS comprises the following steps:
Utilize RTDS to build the system model of actual electric network, this system model comprises system platform model, control system model and the operational system model of building according to a kind of building method of the AVC soft simulation closed-loop system platform based on RTDS, the primary system model that described system platform model is tested actual electric network, described control system model is the steering logic model of the action equipment in system, and described operational system model shows and the centralized control operation model for tested actual electric network being carried out running status;
Utilize the script of RTDS, write the data input/output interface program in the script file of RTDS, extract service data and output from runnable interface, the data of output comprise gaining merit and idle, load place busbar voltage, the switching state of electric capacity/Reactor banks, the gear value of load tap changer of load;
Utilize MATLAB to write reactive power/voltage control efficient trace routine and read rack result data and service data, comprising gaining merit and idle, load place busbar voltage, the switching state of electric capacity/Reactor banks, the gear value of load tap changer of load, the execution idle work optimization calculates, with result of calculation output, pass back in RTDS with the calculated value of data input/output interface program with the switching of load tap changer gear and electric capacity/Reactor banks according to result data;
Utilize the batch processing of RTDS to accept the gear of the load tap changer that idle control efficiency trace routine passes back, the computational data of electric capacity/Reactor banks switching, and on runnable interface, gears regulating switch, the electric capacity/Reactor banks fling-cut switch of load tap changer are adjusted to calculated value.
Further technical scheme is that above-mentioned data input/output interface program comprises that the collection of user interface, the demonstration of reactive Voltage Optimum analysis result, real time data and text output module, idle work optimization control strategy data regulate and control four modules of module, the write method of this data input/output interface program is as follows
Write based on the user interface of MATLAB and be converted to executable file;
Write the reactive Voltage Optimum analysis result display interface based on the RTDS script;
Write collection and text output based on the real time data of RTDS script;
Utilize function " fopen (and " a.txt ", w); ", open text " a.txt ";
Utilize function " MeterCapture () ", Real-time Collection RTDS system voltage, power, load tap changer, electric capacity/reactor switch data;
Utilize function " fprintf (" a.txt ") ", real time data is outputed in text " a.txt ";
Utilize function " fclose (" a.txt ") ", close this text.
To pass back in the RTDS batch processing based on the control strategy program of RTDS script under the MATLAB environment, realize the regulation and control of idle work optimization control strategy data;
Function " ListenOnPort (code, true) " based on the RTDS script waits port application to be opened;
Under the MATLAB environment, write data transmission function jtcp;
Call the jtcp function, with JICPOBJ=jtcp (' REQUEST ', ' 127.0.0.1 ', code), realize opening the RTDS data transmission port;
Call the jtcp function, utilize jtcp (' write ', JTCPOBJ, ' SetSwitch " Subsystem#1:CTLs:Input:Tap "=-1; '); Load tap changer driving switch equipment in the central control system of statement regulation and control RTDS;
Call the jtcp function, utilize jtcp (' write ', JTCPOBJ, ' PushButton " Subsystem#1:CTLs:Input:STC1YDQ "; '); Capacity reactance device fling-cut switch equipment in the central control system of statement regulation and control RTDS;
Call the jtcp function, (' close ' JICPOBJ), realizes closing the RTDS data transmission port with jtcp.
Further technical scheme is in designing a model of above-mentioned reactive power/voltage control efficient trace routine bag, include applied power constraint, pass stomion power factor constraint, system's controllable device action frequency constraint of transformer in inequality constrain, the applied power of wherein said transformer is constrained to
Closing the stomion power factor is constrained to
System's controllable device action frequency is constrained to ∑ s
i≤ N, described s
iBe the action of certain controllable device, s
i{ 01}, N are the permission action number of all controllable devices of system to ∈.
Compared with prior art, the invention has the beneficial effects as follows: the closed-loop system platform that this is built based on the building method of the AVC soft simulation closed-loop system platform of RTDS, be used for reactive power/voltage control efficient detection method, it not only can be the same with automatic voltage control system, under the same system operating mode, obtain different control strategies, realize the purpose that the control efficiency to existing area power grid AVC system detects.
Description of drawings
Fig. 1 is the closed-loop system platform process schematic diagram that the building method of a kind of AVC soft simulation closed-loop system platform based on RTDS of the present invention builds.
The area power grid primary system wiring schematic diagram of Fig. 2 for providing in a kind of embodiment of reactive power/voltage control efficient detection method based on RTDS of the present invention.
Embodiment
In order to make purpose of the present invention, technical scheme and advantage clearer, below in conjunction with drawings and Examples, the present invention is further elaborated.Should be appreciated that specific embodiment described herein only in order to explain the present invention, is not intended to limit the present invention.
An embodiment of the building method of a kind of AVC soft simulation closed-loop system platform based on RTDS of the present invention: a kind of building method of the AVC soft simulation closed-loop system platform based on RTDS comprises following steps:
The first step; Build the system platform model; Local power net is transferred in the text selecting somewhere, builds the primary system model in the RTDS system, comprises generator model, circuit model, three windings/two-winding transformer model, load model, capacitor model, reactor model in the primary system model;
Second step: build control system model, comprise that mainly the system losses that all are kept in model file are calculated the control model, the load tap changer gear is regulated and controlled model, electric capacity/Reactor banks switching control model, and all comprise control object, the control operation of carrying out corresponding to described control object and/or control accordingly configuration parameter;
The 3rd step: the display interface of building the operational system model; Described display interface is used for showing the running status of described system platform model, busbar voltage, the circuit when running status comprises system's operation be meritorious/reactive power, circuit active loss, each winding of transformer be meritorious/and the state of reactive power, transformer active power loss, system's active loss, load tap changer range state, electric capacity/reactor switching;
The 4th step: the gauge tap of building the operational system model; Described gauge tap can regulate and control load tap changer gear and electric capacity/reactor fling-cut switch, the by-pass cock, the electric capacity/reactor fling-cut switch that comprise the load tap changer gear, and the idle work optimization steering order data that receive the output of User Defined data input/output routine;
The 5th step: write the data input/output interface program; The collection and text output, the idle work optimization control strategy data that comprise user interface, the demonstration of reactive Voltage Optimum analysis result, real time data regulate and control four modules.User interface mainly points out the user to call the idle work optimization compute package, utilizes the interface program of MATLAB to realize; The demonstration of reactive Voltage Optimum analysis result is mainly that the result before and after idle work optimization is compared, and utilizes the interface program of MATLAB to realize; The collection of real time data and text output be mainly the real time data of Real-time Collection moving model and deposit in corresponding text, utilizes the script that the RTDS system provides to realize; Idle work optimization control strategy data regulation and control are mainly to be optimized adjusting according to the switch that the reactive Voltage Optimum control strategy that obtains is regulated moving model, utilize the script that the RTDS system provides to realize;
The 6th step: write reactive power/voltage control efficient trace routine; The text of real time data and rack data file as the source document of idle work optimization compute package, are carried out idle work optimization and calculated.Online idle work optimization compute package is that the characteristics that combine the operation of actual automatism voltage control AVC system are write, and has considered network loss target, the constraint of critical point power rate, the constraint of action number of equipment action, calculates the reactive Voltage Optimum control strategy.
As shown in Figure 1, the closed-loop system platform that builds, its flow chart of data processing process is: utilize the batch program of RTDS that service data is outputed to the service data text, then reactive power/voltage control efficient trace routine reading out data text, specify the idle method of operation according to program calculated result, control strategy is returned in the RTDS batch processing, realize control strategy in the RTDS runnable interface, obtain a new state after system stability, the batch program of recycling RTDS outputs to the service data text with service data, moves in circles.
A kind of reactive power/voltage control efficient detection method based on RTDS comprises the following steps:
Utilize RTDS to build the system model of actual electric network, this system model comprises system platform model, control system model and the operational system model of building according to a kind of building method of the AVC soft simulation closed-loop system platform based on RTDS, the primary system model that described system platform model is tested actual electric network, described control system model is the steering logic model of the action equipment in system, and described operational system model shows and the centralized control operation model for tested actual electric network being carried out running status;
Utilize the script of RTDS, write the data input/output interface program in the script file of RTDS, extract service data and output from runnable interface, the data of output comprise gaining merit and idle, load place busbar voltage, the switching state of electric capacity/Reactor banks, the gear value of load tap changer of load;
Utilize MATLAB to write reactive power/voltage control efficient trace routine and read rack result data and service data, comprising gaining merit and idle, load place busbar voltage, the switching state of electric capacity/Reactor banks, the gear value of load tap changer of load, the execution idle work optimization calculates, with result of calculation output, pass back in RTDS with the calculated value of data input/output interface program with the switching of load tap changer gear and electric capacity/Reactor banks according to result data;
Utilize the batch processing of RTDS to accept the gear of the load tap changer that idle control efficiency trace routine passes back, the computational data of electric capacity/Reactor banks switching, and on runnable interface, gears regulating switch, the electric capacity/Reactor banks fling-cut switch of load tap changer are adjusted to calculated value.
A kind of preferred embodiment of building method of the AVC soft simulation closed-loop system platform based on RTDS according to the present invention, the data input/output interface program comprises that the collection of user interface, the demonstration of reactive Voltage Optimum analysis result, real time data and text output module, idle work optimization control strategy data regulate and control four modules of module, the write method of this data input/output interface program is as follows
Write based on the user interface of MATLAB and be converted to executable file;
Write the reactive Voltage Optimum analysis result display interface based on the RTDS script;
Write collection and text output based on the real time data of RTDS script;
Utilize function " fopen (and " a.txt ", w); ", open text " a.txt ";
Utilize function " MeterCapture () ", Real-time Collection RTDS system voltage, power, load tap changer, electric capacity/reactor switch data;
Utilize function " fprintf (" a.txt ") ", real time data is outputed in text " a.txt ";
Utilize function " fclose (" a.txt ") ", close this text.
To pass back in the RTDS batch processing based on the control strategy program of RTDS script under the MATLAB environment, realize the regulation and control of idle work optimization control strategy data;
Function " ListenOnPort (code, true) " based on the RTDS script waits port application to be opened;
Under the MATLAB environment, write data transmission function jtcp;
Call the jtcp function, with JICPOBJ=jtcp (' REQUEST ', ' 127.0.0.1 ', code), realize opening the RTDS data transmission port;
Call the jtcp function, utilize jtcp (' write ', JTCPOBJ, ' SetSwitch " Subsystem#1:CTLs:Input:Tap "=-1; '); Load tap changer driving switch equipment in the central control system of statement regulation and control RTDS;
Call the jtcp function, utilize jtcp (' write ', JTCPOBJ, ' PushButton " Subsystem#1:CTLs:Input:STC1YDQ "; '); Capacity reactance device fling-cut switch equipment in the central control system of statement regulation and control RTDS;
Call the jtcp function, (' close ' JICPOBJ), realizes closing the RTDS data transmission port with jtcp.
Another preferred embodiment of a kind of building method of the AVC soft simulation closed-loop system platform based on RTDS according to the present invention, in the designing a model of reactive power/voltage control efficient trace routine bag, include applied power constraint, pass stomion power factor constraint, system's controllable device action frequency constraint of transformer in inequality constrain, the applied power of wherein said transformer is constrained to
Closing the stomion power factor is constrained to
System's controllable device action frequency is constrained to ∑ s
i≤ N, described s
iBe the action of certain controllable device, s
i{ 0,1}, N are the permission action number of all controllable devices of system to ∈.The simulated target that adopts is that network loss is optimum, active power and reactive power that comprise trend equality constraint, variable tap tap constraint, the constraint of tunable capacitor Reactor banks switching group number, each node voltage constraint of system, power supply point retrain, the line current constraint.
In addition, for above-mentioned finding the solution of designing a model, adopted the Constraints method for solving, the method is that with the difference of the nonlinear programming approach of routine non-linear Integer programming in the past adopts the embedded penalty function method of primal-dual interior method or genetic algorithm to find the solution mostly, and this method is converted to Constraints with the mixed integer programming problem, finds the solution with the modern interior-point method.
The Constraints model, introduce the number of operations restriction in traditional optimal load flow model after, former nonlinear programming problem has the characteristics such as discreteness non-linear, discontinuous, control variable because the introducing of 0-1 discrete variable has become the mixed integer programming problem, and is very difficult to its Exact Solution.Given this, the number of operations restriction in mathematical model can be converted into Constraints, and the recycling Modern Interior Point Optimization Algorithm is found the solution.
The design's model conversion is the Constraints model, needs the number of operations restriction is done as down conversion:
Wherein, s
i(1-s
i)=0 has guaranteed control variable state s
iValue can only be 0 or 1.
In order to guarantee convergence, adopt the 4.2 described method for solving of joint, introduce relaxation parameter ε, and 0-1 discrete variable s is done continuous treatment:
So far, contain the Construction of A Model of Constraints complete.The number of operations restriction is processed with the Constraints strategy, changes into conventional nonlinear programming problem, can adopt Modern Interior Point Optimization Algorithm to find the solution.
[0010] the invention has the beneficial effects as follows:
The core methed of area power grid AVC system can be described as a typical online Reactive Power Optimazation Problem, by extract real time data from dispatch automated system SCADA/EMS, then carry out after online idle work optimization calculates, provide the electric capacity of system/reactor switching group number and load tap changer gear regulative mode.But whether the idle method of operation of formulating for Voltage Automatic Control System is to satisfy under power grid operation requires, making objective function be in the scheme of optimum state, still there is no a kind of basis for estimation accurately.The present invention with the optimum idle method of operation of policy development, carries out the contrast of reactive power/voltage control efficient by the operation strategy with existing area power grid AVC system on the basis of the control strategy of having studied AVC, realize the examination to area power grid AVC system.
It is as follows that the reactive power/voltage control efficient detection method that the present invention is based on the RTDS system comprises the test adjustment step:
(1) completion system platform model, control system model, debugging and compiling are passed through;
(2) complete building of operational system model, commissioning test, and the correctness of detection system trend;
(3) complete the design of data input/output interface program, obtain corresponding shell script, open the batch processing window in runnable interface, open corresponding shell script and operation, obtain text; Open text, check the correctness of this voltage that constantly gathers, power, on off state;
(4) complete calling of idle work optimization compute package according to the 6th step, be optimized after control strategy, and the be optimized network loss after regulating and the equipment state of moving, show in conjunction with the pilot lamp of network loss on the display interface of moving model with the action facility switching, check the correctness of data; And check whether the network loss result reduces, and whether action equipment moves successfully.
(5) analysis result before and after display optimization is adjusted.
As shown in Figure 2, the present invention carries out emulation testing to certain regional power grid, with checking model of the present invention and method.The area power grid primary system wiring schematic diagram that Fig. 2 provides for the embodiment of the present invention.
Parameter such as the table 1 of test macro.
Table 1 test macro parameter
The selecting system loss minimization is objective function, but and default each capacitor group switching quantity limit value N=1, it can only be 1 grade of up and down that the transtat Turn Ratio Changing is regulated variation at every turn.Voltage request: the highest 235kV of 220kV electric pressure, minimum 210kV; The highest 118kV of 110kV electric pressure, minimum 105kV; The highest 38kV of 35kV electric pressure, minimum 32kV; The highest 11kV of 10kV electric pressure, minimum 10kV.220kV circuit critical point power factor minimum 0.9.
By following examples as can be known, can and idlely regulate in real time the voltage of area power grid based on the reactive power/voltage control efficient detection method of RTDS, and can carry out real-time check to the control strategy of actual area power grid AVC system.
Test as an example of four typical conditions example:
(1) embodiment one: zone, Taihe county voltage is generally higher.The initial total network loss of each electric pressure ceiling voltage, minimum voltage, initial power factor and system is as shown in table 2.
Table 2 operating mode 1 test macro parameter
Reactive power/voltage control efficient software be optimized the action and result as follows.
Sequence of movement:
1) 6 grades of bright No. 1 main transformers transfer to 7 grades; 6 grades of No. 1, Taihe county and No. 2 main transformers are transferred to 5 grades; No. 1 electric capacity excision of soil bridge;
2) 6 grades of bright No. 1 main transformers transfer to 7 grades; 6 grades of No. 1, Taihe county and No. 2 main transformers are transferred to 5 grades; Bright No. 1 electric capacity drops into;
The result of the action:
Table 3 operating mode 1 is optimized the result of the action
By as seen from Table 3, through 2 step control actions, the critical point power factor of all node voltages of electrical network and 220kV circuit is all qualified, the network loss 0.073MW that descended.
(2) embodiment two: bridge regional voltage in Yongding is generally higher.The initial total network loss of each electric pressure ceiling voltage, minimum voltage, initial power factor and system is as shown in table 4.
Table 4 operating mode 2 test macro parameters
Optimize action and result as follows.
Sequence of movement:
1) 2 grades of bright No. 1 main transformers transfer to 3 grades; 6 grades of No. 1, Taihe county and No. 2 main transformers are transferred to 5 grades; No. 1 electric capacity excision of Mongolian sun;
2) 3 grades of bright No. 1 main transformers transfer to 4 grades;
3) 4 grades of bright No. 1 main transformers transfer to 5 grades;
4) 5 grades of bright No. 1 main transformers transfer to 6 grades;
5) 6 grades of No. 1, Yongding bridge and No. 2 main transformers are transferred to 5 grades.
The result of the action:
Table 5 operating mode 2 is optimized the result of the action
By as seen from Table 5, through 5 step control actions, the critical point power factor of all node voltages of electrical network and 220kV circuit is all qualified, the network loss 0.305MW that descended.
(3) embodiment three: bridge regional voltage in Yongding is generally on the low side.The initial total network loss of each electric pressure ceiling voltage, minimum voltage, initial power factor and system is as shown in table 6.
Table 6 operating mode 3 test macro parameters
Optimize action and result as follows.
Sequence of movement:
1) bright No. 1 main transformer transfers to 8 grades from 7 grades; No. 1, Taihe county main transformer transfers to 5 grades from 6 grades; No. 2, Taihe county main transformer transfers to 5 grades from 6 grades; Bridge No. 1 electric capacity in Yongding drops into;
2) bright No. 1 main transformer transfers to 9 grades from 8 grades; Bridge No. 2 electric capacity in Yongding drop into;
3) bright No. 1 main transformer transfers to 10 grades from 9 grades; Bridge No. 3 electric capacity in Yongding drop into;
4) bright No. 1 main transformer transfers to 11 grades from 10 grades; Federal No. 1 electric capacity drops into;
5) No. 1, Taihe county main transformer transfers to 6 grades from 7 grades; No. 2, Taihe county main transformer transfers to 6 grades from 7 grades; Bridge No. 4 electric capacity in Yongding drop into;
6) No. 1, numerous river electric capacity drops into;
7) No. 2, numerous river electric capacity drops into;
8) No. 1 electric capacity of day Peng drops into;
9) No. 3, numerous river electric capacity drops into;
10) No. 2 electric capacity of day Peng drop into;
11) No. 4, numerous river electric capacity drops into.
The result of the action:
Table 7 operating mode 3 is optimized the result of the action
By as seen from Table 7, through 11 step control actions, all node voltages of electrical network and critical point power factor are all qualified, the network loss 0.18MW that descended.
(4) embodiment four: voltage is higher, mends without merits and demerits.The initial total network loss of each electric pressure ceiling voltage, minimum voltage, initial power factor and system is as shown in table 8.
Table 8 operating mode 4 test macro parameters
Optimize action and result as follows.
Sequence of movement:
1) 5 grades of bright No. 1 main transformers transfer to 4 grades; 6 grades of No. 1, Taihe county and No. 2 main transformers are transferred to 5 grades; Bridge No. 1 electric capacity in Yongding drops into;
2) 6 grades of No. 1, Yongding bridge and No. 2 main transformers are transferred to 5 grades; Bridge No. 2 electric capacity in Yongding drop into;
3) mouth No. 1 electric capacity in hole drops into;
The result of the action:
Table 9 operating mode 4 is optimized the result of the action
By as seen from Table 9, through 3 step control actions, the critical point power factor of all node voltages of electrical network and 220kV circuit is all qualified, the network loss 0.147MW that descended.
(5) embodiment five: voltage is higher, and is idle normal.The initial total network loss of each electric pressure ceiling voltage, minimum voltage, initial power factor and system is as shown in table 10.
Table 10 operating mode 5 test macro parameters
Optimize action and result as follows.
Sequence of movement:
1) 5 grades of bright No. 1 main transformers transfer to 4 grades; 6 grades of No. 1, Taihe county and No. 2 main transformers are transferred to 5 grades; Bridge No. 1 electric capacity in Yongding drops into;
2) 6 grades of No. 1, Yongding bridge and No. 2 main transformers are transferred to 5 grades; Bridge No. 2 electric capacity in Yongding drop into;
3) bridge No. 3 electric capacity in Yongding drop into;
4) bridge No. 4 electric capacity in Yongding drop into;
5) 5 grades of No. 1, Yongding bridge and No. 2 main transformers are transferred to 4 grades; No. 1 electric capacity of Mongolian sun drops into.
The result of the action:
Table 11 operating mode 5 is optimized the result of the action
By as seen from Table 11, through 5 step control actions, the critical point power factor of all node voltages of electrical network and 220kV circuit is all qualified, the network loss 0.305MW that descended.
One of ordinary skill in the art will appreciate that all or part of flow process that realizes in above-described embodiment, to come instruction to complete by computer program, described program can be stored in computer read/write memory medium, described program can comprise the flow process of the embodiment of above-mentioned each method when carrying out.Wherein, described storage medium can be CD, USB flash disk, portable hard drive etc.
Although invention has been described with reference to a plurality of explanatory embodiment of the present invention here, but, should be appreciated that, those skilled in the art can design a lot of other modification and embodiments, and these are revised and within embodiment will drop on the disclosed principle scope and spirit of the application.More particularly, in the scope of, accompanying drawing open in the application and claim, can carry out multiple modification and improvement to building block and/or the layout of subject combination layout.Except modification that building block and/or layout are carried out with improving, to those skilled in the art, other purposes will be also obvious.
Claims (4)
1. building method based on the AVC soft simulation closed-loop system platform of RTDS is characterized in that comprising following steps:
The first step; Build the system platform model, local power net is transferred in the text selecting somewhere, build the primary system model in the RTDS system, comprise generator model, circuit model, three windings/two-winding transformer model, load model, capacitor model, reactor model in the primary system model;
Second step: build control system model, comprise that mainly the system losses that all are kept in model file are calculated the control model, the load tap changer gear is regulated and controlled model, electric capacity/Reactor banks switching control model, and all comprise control object, the control operation of carrying out corresponding to described control object and/or control accordingly configuration parameter;
The 3rd step: the display interface of building the operational system model, described display interface is used for showing the running status of described system platform model, busbar voltage, the circuit when running status comprises system's operation be meritorious/reactive power, circuit active loss, each winding of transformer be meritorious/and the state of reactive power, transformer active power loss, system's active loss, load tap changer range state, electric capacity/reactor switching;
The 4th step: the gauge tap of building the operational system model, described gauge tap can regulate and control load tap changer gear and electric capacity/reactor fling-cut switch, the by-pass cock, the electric capacity/reactor fling-cut switch that comprise the load tap changer gear, and the idle work optimization steering order data that receive the output of User Defined data input/output routine;
The 5th step: write the data input/output interface program, the collection and text output, the idle work optimization control strategy data that comprise user interface, the demonstration of reactive Voltage Optimum analysis result, real time data regulate and control four modules, user interface mainly points out the user to call the idle work optimization compute package, utilizes the interface program of MATLAB to realize; The demonstration of reactive Voltage Optimum analysis result is mainly that the result before and after idle work optimization is compared, and utilizes the interface program of MATLAB to realize; The collection of real time data and text output be mainly the real time data of Real-time Collection moving model and deposit in corresponding text, utilizes the script that the RTDS system provides to realize; Idle work optimization control strategy data regulation and control are mainly to be optimized adjusting according to the switch that the reactive Voltage Optimum control strategy that obtains is regulated moving model, utilize the script that the RTDS system provides to realize;
The 6th step: write reactive power/voltage control efficient trace routine, with the text of real time data and the rack data file source document as the idle work optimization compute package, carrying out idle work optimization calculates, online idle work optimization compute package is that the characteristics that combine the operation of actual automatism voltage control AVC system are write, consider network loss target, the constraint of critical point power rate, the constraint of action number of equipment action, calculated the reactive Voltage Optimum control strategy.
2. reactive power/voltage control efficient detection method based on RTDS is characterized in that comprising the following steps:
Utilize RTDS to build the system model of actual electric network, this system model comprises system platform model, control system model and the operational system model that a kind of building method of the AVC soft simulation closed-loop system platform based on RTDS is according to claim 1 built, the primary system model that described system platform model is tested actual electric network, described control system model is the steering logic model of the action equipment in system, and described operational system model shows and the centralized control operation model for tested actual electric network being carried out running status;
Utilize the script of RTDS, write the data input/output interface program in the script file of RTDS, extract service data and output from runnable interface, the data of output comprise gaining merit and idle, load place busbar voltage, the switching state of electric capacity/Reactor banks, the gear value of load tap changer of load;
Utilize MATLAB to write reactive power/voltage control efficient trace routine and read rack result data and service data, comprising gaining merit and idle, load place busbar voltage, the switching state of electric capacity/Reactor banks, the gear value of load tap changer of load, the execution idle work optimization calculates, with result of calculation output, pass back in RTDS with the calculated value of data input/output interface program with the switching of load tap changer gear and electric capacity/Reactor banks according to result data;
Utilize the batch processing of RTDS to accept the gear of the load tap changer that idle control efficiency trace routine passes back, the computational data of electric capacity/Reactor banks switching, and on runnable interface, gears regulating switch, the electric capacity/Reactor banks fling-cut switch of load tap changer are adjusted to calculated value.
3. a kind of reactive power/voltage control efficient detection method based on RTDS according to claim 2, it is characterized in that: described data input/output interface program comprises that the collection of user interface, the demonstration of reactive Voltage Optimum analysis result, real time data and text output module, idle work optimization control strategy data regulate and control four modules of module, the write method of this data input/output interface program is as follows
Write based on the user interface of MATLAB and be converted to executable file;
Write the reactive Voltage Optimum analysis result display interface based on the RTDS script;
Write collection and text output based on the real time data of RTDS script;
Utilize function " fopen (and " a.txt ", w); ", open text " a.txt ";
Utilize function " MeterCapture () ", Real-time Collection RTDS system voltage, power, load tap changer, electric capacity/reactor switch data;
Utilize function " fprintf (" a.txt ") ", real time data is outputed in text " a.txt ";
Utilize function " fclose (" a.txt ") ", close this text.
To pass back in the RTDS batch processing based on the control strategy program of RTDS script under the MATLAB environment, realize the regulation and control of idle work optimization control strategy data;
Function " ListenOnPort (code, true) " based on the RTDS script waits port application to be opened;
Under the MATLAB environment, write data transmission function jtcp;
Call the jtcp function, with JICPOBJ=jtcp (' REQUEST ', ' 127.0.0.1 ', code), realize opening the RTDS data transmission port;
Call the jtcp function, utilize jtcp (' write ', JTCPOBJ, ' SetSwitch " Subsystem#1:CTLs:Input:Tap "=-1; '); Load tap changer driving switch equipment in the central control system of statement regulation and control RTDS;
Call the jtcp function, utilize jtcp (' write ', JTCPOBJ, ' PushButton " Subsystem#1:CTLs:Input:STC1YDQ "; '); Capacity reactance device fling-cut switch equipment in the central control system of statement regulation and control RTDS;
Call the jtcp function, (' close ' JICPOBJ), realizes closing the RTDS data transmission port with jtcp.
4. the building method of a kind of AVC soft simulation closed-loop system platform based on RTDS according to claim 1, it is characterized in that: in the designing a model of described reactive power/voltage control efficient trace routine bag, include applied power constraint, pass stomion power factor constraint, system's controllable device action frequency constraint of transformer in inequality constrain, the applied power of wherein said transformer is constrained to
Closing the stomion power factor is constrained to
System's controllable device action frequency is constrained to ∑ s
i≤ N, described s
iBe the action of certain controllable device, s
i{ 01}, N are the permission action number of all controllable devices of system to ∈.
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