CN102684188A - Large and small running mode reactive power optimizing and joint adjusting method of electric system - Google Patents
Large and small running mode reactive power optimizing and joint adjusting method of electric system Download PDFInfo
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Abstract
The invention discloses a large and small running mode reactive power optimizing and joint adjusting method of an electric system. The method comprises the following steps of: reading in the BPA (back propagation algorithm) data of the electric network and carrying out power flow calculation by means of a PSD-BPA (phase sensitive detection-back propagation algorithm) software tool; for electric network data, the power flow of which is not converged, adjusting through an optimal power flow module, carrying out error screening and correction on a network parameter and a running parameter, and giving out a reasonable running mode under a network area framework; obtaining the data of a needed network area from the converged electric network data through an equivalent method, and analyzing data needed by a reactive power optimizing module from the converged electric network data; and carrying out large and small running mode reactive power joint optimization. By using the method, a transformer tapping adapting to a large running mode and a small running mode can be found out; a reactive power voltage optimization configuration policy is given out; the reactive power voltage optimization running between each two voltage classes is realized; the voltage percent of pass of the whole network is improved; a theoretical basis is provided for making the running modes of the electric network; and the electric network is guaranteed to run safely and stably.
Description
Technical field
The present invention relates to power system reactive power analysis and optimization field, specifically a kind of electric power system size operational mode idle work optimization uniting and adjustment method.
Background technology
In recent ten years, the power system safety and stability problem becomes the focus that industry is paid close attention to day by day.In the electrical network, the load of long transmission line increases the weight of because weak pattern is unified in modern times, and the transmission capacity of electrical network makes the stable problem of system more outstanding more and more near its limit.Optimize the operational mode of electric power system, can improve the safety and stability environment of electric power system significantly, and Reactive power optimization is an important step wherein, it relates to large-scale, non-linear, dynamic and discrete combinatorial problem.Existing flow process be the operations staff according to load data, grid structure and experience initialization, carry out verification with the flow calculation program of BPA; The tidal current chart of manual analysis BPA is artificially confirmed each relevant adjustment amount by each point voltage with direction of tide then.So, even if sophisticated operations staff, also big frame in hand, and a lot of detailed problem can not be exhaustive, find optimum scheme is the unusual thing of difficulty.Along with the development of power system analysis method and computing technique, be badly in need of solving the above problems, do not see the scheme that has the many-sided deficiency to traditional idle work optimization comprehensively to solve so far.
Summary of the invention
The objective of the invention is to propose a kind of electric power system size operational mode idle work optimization uniting and adjustment method; The reactive voltage that this method can be optimized between each electric pressure is coordinated control; Propose the reactive Voltage Optimum collocation strategy, improve the rate of qualified voltage of the whole network, reduce system losses.For the operational mode of formulating electrical network provides theoretical foundation, guarantee power network safety operation.
The present invention addresses the above problem the technical scheme that is adopted: a kind of electric power system size operational mode idle work optimization uniting and adjustment method comprises the following steps:
(1) the big mode data and the little mode data of input are carried out BPA trend calculation check,, then be adjusted to convergence through the optimal load flow module if the result of BPA trend calculation check does not restrain;
(2) the BPA data file of verification convergence or adjustment convergence is carried out the network equivalence, equivalence goes out the data of required network;
(3) whether the equivalent result of verification network restrains, if do not restrain, then adjusts original BPA data file and also reads in again;
(4) from the network data of equivalence, parse big or small mode and optimize required rack data and service data;
(5) the big or small mode combined optimization that parses required rack data and service data are carried out combined optimization;
(6) if the idle combined optimization of big or small mode calculates convergence, then generate new BPA data file, and call the BPA Software tool automatically and carry out the trend verification, the verification convergence then generates destination file;
(7) if the idle combined optimization of big or small mode calculates the BPA data file check results that does not restrain or generate does not restrain, then adjust the parameter setting, recomputate;
(8), form the electrical network analysis form according to idle work optimization module result of calculation.
The system that a kind of electric power system size operational mode idle work optimization uniting and adjustment method adopts; This system comprises data interface module, big or small mode idle work optimization uniting and adjustment computing module and interpretation of result and statistical module; Data interface module is realized the interactive function of data; Data interface module comprises BPA data file unit, Database Unit, interface management unit and Data Management Unit; BPA data file unit resolves goes out required grid structure parameter and the system operational parameters of big or small mode idle work optimization uniting and adjustment computing module; Given transformer, capacitor, reactor parameter in grid structure parameter and the system operational parameters binding data library unit; Generate the needed data file of big or small mode idle work optimization uniting and adjustment computing module; And through Data Management Unit transformer gear parameter given in grid structure parameter and system operational parameters and the Database Unit, capacitor and reactor group parameter are adjusted accordingly, interface management unit is written back to relevant position, BPA data file unit with the data that big or small mode idle work optimization uniting and adjustment computing module calculates; Size mode idle work optimization uniting and adjustment computing module is found the solution calculating through the monthly large and small operational mode of simultaneous, analyzes and calculate the common load tap changer that adapts under the dual mode; Interpretation of result and statistical module comprise analysis report unit, analysis of strategies unit and print unit; Before the analysis report unit calculates big or small mode idle work optimization uniting and adjustment computing module with calculate after the state value of reactive power equipment add up and form the reactive voltage analysis report; Comprise: net decreases statistical conditions before and after 500kV transformer tapping position and corresponding voltage value, 500kV reactive compensation capacity of substation summary sheet, 220kV reactive compensation capacity of substation summary sheet, electrical network tracking unit output summary sheet, the optimization; The analysis of strategies unit provides the optimisation strategy of electric network reactive-load configuration through the result of calculation of analyzing big or small mode idle work optimization uniting and adjustment computing module; Comprise: the suggestion that the capacitor under each electric pressure tap adjustment gear of transformer, the current reactive power compensation configuring condition and reactor switching, electrical network part transformer station increase capacitor and reactor configuration; Print unit prints the reactive voltage analysis report; So that archive management, interpretation of result and statistical module directly are used for instructing the establishment power system operating mode.
Compare with the prior art scheme, the invention has the beneficial effects as follows:
The present invention has found two transformer tappings that mode all is fit to; Realize the reactive Voltage Optimum operation between the electric pressure under the monthly large and small mode; Reduce the via net loss of electrical network, guaranteed the quality of voltage between each electric pressure, satisfied relevant laws and regulations of the state correlation technique standard.Solved the many-sided not enough of traditional idle work optimization, all beyond example at home and abroad.
Description of drawings
Fig. 1 is the system architecture diagram of electric power system size operational mode idle work optimization uniting and adjustment method according to the invention;
Fig. 2 is the flow chart of electric power system size operational mode uniting and adjustment method of the present invention.
Embodiment
With reference to the accompanying drawings, be described in detail specific embodiments of the present invention.
Embodiment 1
As shown in Figure 1; The system architecture diagram of electric power system size operational mode idle work optimization uniting and adjustment method of the present invention; This system comprises data interface module, big or small mode idle work optimization uniting and adjustment computing module and interpretation of result and statistical module; Data interface module is realized the interactive function of data; Data interface module comprises BPA data file unit, Database Unit, interface management unit and Data Management Unit; BPA data file unit resolves goes out required grid structure parameter and the system operational parameters of big or small mode idle work optimization uniting and adjustment computing module; Given transformer, capacitor, reactor parameter in grid structure parameter and the system operational parameters binding data library unit; Generate the needed data file of big or small mode idle work optimization uniting and adjustment computing module, and through Data Management Unit transformer gear parameter given in grid structure parameter and system operational parameters and the Database Unit, capacitor and reactor group parameter are adjusted accordingly, interface management unit is written back to relevant position, BPA data file unit with the data that big or small mode idle work optimization uniting and adjustment computing module calculates; Size mode idle work optimization uniting and adjustment computing module is found the solution calculating through the monthly large and small operational mode of simultaneous, analyzes and calculate the common load tap changer that adapts under the dual mode; Interpretation of result and statistical module comprise analysis report unit, analysis of strategies unit and print unit; Before the analysis report unit calculates big or small mode idle work optimization uniting and adjustment computing module with calculate after the state value of reactive power equipment add up and form the reactive voltage analysis report; Comprise: net decreases statistical conditions before and after 500kV transformer tapping position and corresponding voltage value, 500kV reactive compensation capacity of substation summary sheet, 220kV reactive compensation capacity of substation summary sheet, electrical network tracking unit output summary sheet, the optimization; The analysis of strategies unit provides the optimisation strategy of electric network reactive-load configuration through the result of calculation of analyzing big or small mode idle work optimization uniting and adjustment computing module; Comprise: the suggestion that the capacitor under each electric pressure tap adjustment gear of transformer, the current reactive power compensation configuring condition and reactor switching, electrical network part transformer station increase capacitor and reactor configuration; Print unit prints the reactive voltage analysis report; So that archive management, interpretation of result and statistical module directly are used for instructing the establishment power system operating mode.
As shown in Figure 2, a kind of electric power system size operational mode idle work optimization uniting and adjustment method comprises the steps:
1, reads in the BPA data of the large and small two kinds of operational modes of electrical network; Carry out the trend verification by means of the PSD-BPA Software tool; If the trend check results does not restrain; Then, network parameter and operational factor are carried out mistake screening and correction, provide reasonable Operation Mode under the framework of barrier through the adjustment of optimal load flow module;
2, the electric network data of convergence is the data basis that idle work optimization is analyzed, and goes out the data in required barrier from the electric network data medium value that restrains, and therefrom parses the data that the idle work optimization module needs;
3, whether the equivalent result of verification network restrains, if do not restrain, then adjusts original BPA data file and also reads in again;
4, carry out the idle combined optimization of big or small operational mode and calculate, the transformer tapping that finds dual mode all to be fit to realizes satisfying the operation of the reactive Voltage Optimum between different electric pressures under the monthly big or small operational mode;
If 5 idle work optimizations calculate convergence, then export Optimization result, and generate destination file, if do not restrain, adjust equivalent system parameters, carry out the idle combined optimization of big or small operational mode again and calculate.
It is under the situation of given system network architecture and system loading that idle combined optimization of the present invention calculates; Assurance is satisfied under the prerequisite of user power utilization demand; Optimize the static service conditions of electric power system; Make the target function value of appointment reach minimum through regulating control variables, satisfy physical restriction and the operation restriction of system simultaneously control variables, state variable and variable function.The adjusting control variables comprises meritorious idle the exerting oneself of generator, load tap changer, capacitor component group switching etc.Not only can guarantee the quality of voltage of the whole network through idle work optimization, and can obtain considerable economic, can realize the fail safe and the economy of the quality of power supply, system's operation.
The Mathematical Modeling of little mode idle work optimization uniting and adjustment: the uniting and adjustment of big or small mode idle work optimization are in order to find two transformer tappings that operational mode all is fit to of size; Carry out associating optimizing with minimum as target function with big or small operational mode active power loss; The reactive Voltage Optimum operation between the electric pressure under the monthly big or small operational mode is satisfied in realization; Coordinate the quality of voltage between each electric pressure of control, satisfy Southern Power Grid Company quality of voltage and var administrative standard.
Control variables parameter setting among the present invention comprises: meritorious exert oneself, idlely exert oneself, transformer tapping, capacity reactance device switching group number.Wherein: meritorious exert oneself be set to as requested with some power plant meritorious exert oneself be made as adjustable; It is all adjustable that idle all balance node that require value nodes such as meritorious conditional PV node, electrical network be outer and electrical network of exerting oneself idle exerted oneself; Transformer tapping is all adjustable; Electrical network 500kV, 220kV transformer station capacity reactance device is all adjustable.The maximum compensation capacity that allows of the capacitor of all transformer stations is 80% of existing configuration compensation capacity, and the maximum compensation capacity that allows of the reactor of all transformer stations is existing reactor configuration capacity.
Its constraints parameter setting comprises: load or burden without work model, node voltage.Wherein: the load or burden without work model all adds constrained; The node voltage restriction comprises 500kV, 220kV, 110kV busbar voltage, generator voltage, and limited field is as shown in table 1.
Table 1 node voltage limited field
Certain electrical network 500kV main transformer tap joint position is as shown in table 1 before and after the optimization of the embodiment of the invention.Through combined optimization, find out and satisfy each minimum load tap changer of grid net loss.
Certain electrical network 500kV main transformer tap joint position before and after the uniting and adjustment of the big or small operational mode idle work optimization of table 1 are optimized
| Factory's station name | Tap gear before optimizing | 220kV side magnitude of voltage (kV) before optimizing | Optimize back tap gear | Optimize back 220kV side voltage (kV) |
| A 1 main transformer of standing | 3 | 230 | 3 | 230 |
| The B station owner becomes | 3 | 230 | 2 | 236 |
| C 1 main transformer of standing | 5 | 230 | 5 | 230 |
| D 1 main transformer of standing | 5 | 230 | 5 | 230 |
| E 1 main transformer of standing | 6 | 226 | 5 | 230 |
| F 1 main transformer of standing | 3 | 242 | 2 | 248 |
| G 1 main transformer of standing | 9 | 230 | 11 | 224 |
| H 1 main transformer of standing | 5 | 230 | 5 | 230 |
| I 1 main transformer of standing | 4 | 236 | 3 | 242 |
| J 1 main transformer of standing | 5 | 230 | 4 | 236 |
| K 1 main transformer of standing | 5 | 230 | 5 | 230 |
| K 2 main transformers of standing | 5 | 230 | 5 | 230 |
| L 1 main transformer of standing | 2 | 248 | 1 | 254 |
| L 2 main transformers of standing | 2 | 248 | 3 | 242 |
Delivery, net based on before and after optimizing under the big mode of certain month big or small method of operation idle work optimization uniting and adjustment decrease electric weight, can calculate the net loss rate of electrical network through net loss rate computing formula.Big mode net loss rate situation was as shown in table 2 before and after electrical network month big or small operational mode idle work optimization uniting and adjustment were optimized, and optimized the back active power loss and before optimizing, lacked 9.35MW, and the net loss rate reduces by 0.0698%.Little mode net loss rate situation was as shown in table 3 before and after electrical network month big or small operational mode idle work optimization uniting and adjustment were optimized, and optimized the back active power loss and before optimizing, lacked 7.57MW, and the net loss rate reduces by 0.0949%.
Big mode net loss rate before and after month big or small operational mode idle work optimization uniting and adjustment of table 2 electrical network are optimized
Little mode net loss rate before and after month big or small operational mode idle work optimization uniting and adjustment of table 3 electrical network are optimized
Claims (2)
1. an electric power system size operational mode idle work optimization uniting and adjustment method is characterized in that this method comprises the following steps:
(1) the big mode data and the little mode data of input are carried out BPA trend calculation check,, then be adjusted to convergence through the optimal load flow module if the result of BPA trend calculation check does not restrain;
(2) the BPA data file of verification convergence or adjustment convergence is carried out the network equivalence, equivalence goes out the data of required network;
(3) whether the equivalent result of verification network restrains, if do not restrain, then adjusts original BPA data file and also reads in again;
(4) from the network data of equivalence, parse big or small mode and optimize required rack data and service data;
(5) the big or small mode combined optimization that parses required rack data and service data are carried out combined optimization;
(6) if the idle combined optimization of big or small mode calculates convergence, then generate new BPA data file, and call the BPA Software tool automatically and carry out the trend verification, the verification convergence then generates destination file;
(7) if the idle combined optimization of big or small mode calculates the BPA data file check results that does not restrain or generate does not restrain, then adjust the parameter setting, recomputate;
(8), form the electrical network analysis form according to idle work optimization module result of calculation.
2. the system that adopts of electric power system size operational mode idle work optimization uniting and adjustment method; It is characterized in that; This system comprises data interface module, big or small mode idle work optimization uniting and adjustment computing module and interpretation of result and statistical module; Data interface module is realized the interactive function of data; Data interface module comprises BPA data file unit, Database Unit, interface management unit and Data Management Unit; BPA data file unit resolves goes out required grid structure parameter and the system operational parameters of big or small mode idle work optimization uniting and adjustment computing module; Given transformer, capacitor, reactor parameter in grid structure parameter and the system operational parameters binding data library unit; Generate the needed data file of big or small mode idle work optimization uniting and adjustment computing module, and through Data Management Unit transformer gear parameter given in grid structure parameter and system operational parameters and the Database Unit, capacitor and reactor group parameter are adjusted accordingly, interface management unit is written back to relevant position, BPA data file unit with the data that big or small mode idle work optimization uniting and adjustment computing module calculates; Size mode idle work optimization uniting and adjustment computing module is found the solution calculating through the monthly large and small operational mode of simultaneous, analyzes and calculate the common load tap changer that adapts under the dual mode; Interpretation of result and statistical module comprise analysis report unit, analysis of strategies unit and print unit; Before the analysis report unit calculates big or small mode idle work optimization uniting and adjustment computing module with calculate after the state value of reactive power equipment add up and form the reactive voltage analysis report; Comprise: net decreases statistical conditions before and after 500kV transformer tapping position and corresponding voltage value, 500kV reactive compensation capacity of substation summary sheet, 220kV reactive compensation capacity of substation summary sheet, electrical network tracking unit output summary sheet, the optimization; The analysis of strategies unit provides the optimisation strategy of electric network reactive-load configuration through the result of calculation of analyzing big or small mode idle work optimization uniting and adjustment computing module; Comprise: the suggestion that the capacitor under each electric pressure tap adjustment gear of transformer, the current reactive power compensation configuring condition and reactor switching, electrical network part transformer station increase capacitor and reactor configuration; Print unit prints the reactive voltage analysis report; So that archive management, interpretation of result and statistical module directly are used for instructing the establishment power system operating mode.
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| CN104731636A (en) * | 2013-12-19 | 2015-06-24 | Ls产电株式会社 | Dispatcher Training Simulating Device And Operation Method Thereof |
| CN105243248A (en) * | 2015-11-17 | 2016-01-13 | 广东电网有限责任公司电力调度控制中心 | Method and system for producing substation main wiring model used for PSD-BPA simulation |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104731636A (en) * | 2013-12-19 | 2015-06-24 | Ls产电株式会社 | Dispatcher Training Simulating Device And Operation Method Thereof |
| US9785170B2 (en) | 2013-12-19 | 2017-10-10 | Lsis Co., Ltd. | Dispatcher training simulating device and operation method thereof |
| CN104731636B (en) * | 2013-12-19 | 2018-03-06 | Ls产电株式会社 | Dispatcher's training simulation device and its operating method |
| CN104158199A (en) * | 2014-08-05 | 2014-11-19 | 广西电网有限责任公司钦州供电局 | System and method for reactive voltage optimal control of real-time status of power system |
| CN104158199B (en) * | 2014-08-05 | 2016-08-24 | 广西电网有限责任公司钦州供电局 | Power system real-time status is carried out the system and method for reactive power and voltage control |
| CN105243248A (en) * | 2015-11-17 | 2016-01-13 | 广东电网有限责任公司电力调度控制中心 | Method and system for producing substation main wiring model used for PSD-BPA simulation |
| CN105243248B (en) * | 2015-11-17 | 2018-03-06 | 广东电网有限责任公司电力调度控制中心 | Plant stand main electrical scheme model generating method and system for PSD BPA emulation |
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