CN102646983B - Long-term reactive voltage analyzing and optimizing method in power system - Google Patents
Long-term reactive voltage analyzing and optimizing method in power system Download PDFInfo
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Abstract
The invention relates to a long-term reactive voltage analyzing and optimizing method in a power system, which comprises a system architecture design part, a data interface module part, a computation module part and a tidal stream data check part. The method analyzes the tidal stream data of the power grid operation and the problems in the long-term operation of the power grid, optimizes the reactive voltage coordination control among different voltage grades, provides a reactive voltage optimized configuration strategy, enhances the voltage qualification rate of the whole power grid, and provides theoretical references for establishing the operating mode of the power grid, thereby ensuring the safe, stable and reliable operation of the power grid.
Description
Technical field:
The present invention relates to power system reactive power analysis and optimization field, the medium-term and long-term reactive voltage analysis of specifically a kind of electric power system and optimization method.
Background technology:
Modern power systems development scale is more and more huger, between electrical network and electrical network, influences each other, and makes the stability of electrical network occur a lot of problems.Wherein power system reactive power is stable is a very important aspect.It is many-sided in electric power system, causing unsettled reason: between load increase, generator or line fault, System Reactive Power deficiency, on-load tap-changing transformer action and various control and protection, lack coordination etc.; and that load lacks is enough idle, especially dynamic reactive support is the main cause that causes spread of voltage.The idle operational mode of formulating electric power system is the routine work of electrical networks at different levels, and along with the expanding day of electric power system, the operational mode of electrical network becomes increasingly complex, and needs the problem of considering also to get more and more.But there is the existing idle operational mode of quite a few area power grid to be subject to the impact of formulation personnel subjectivity and corresponding objective factor, for the result that obtains being comparatively satisfied with, operations staff often needs repeated multiple times trial to adjust parameter, sometimes expends a large amount of time and efforts and is all difficult to find satisfied optimum results.Up to now, fail to find a kind of idle stable method of good solution.
Summary of the invention:
The object of the invention is to propose the medium-term and long-term reactive voltage analysis of a kind of electric power system and optimization method, it can resolve the flow data of operation of power networks, analyze the problem that the medium-term and long-term operation of electrical network exists, the reactive voltage of optimizing between each electric pressure is coordinated to control, reactive Voltage Optimum collocation strategy is proposed, improve the rate of qualified voltage of the whole network, for the operational mode of formulating electrical network provides theoretical foundation, to guarantee electricity net safety stable reliability service.
The present invention addresses the above problem adopted technical scheme: the medium-term and long-term reactive voltage analysis of a kind of electric power system and optimization method, comprise the steps:
(1) select flow data file, large system parameters is set, large system control parameters is set, large system restriction parameter is set, large system DC parameter is set, the data of input are carried out to trend calculation check, if the result of trend calculation check does not restrain, calculate by large system optimal trend;
(2) form large system convergence result, large system control amount form, large system restriction form, output flow data file;
(3) if the convergence of the result of trend calculation check is carried out Equivalent Network to the electric network data of input, equivalence goes out the data of required network, re-starts trend and calculates check, until calculate convergence;
(4) flow data file is carried out to Equivalent Network;
(5) carry out idle work optimization, equivalent system parameters is set simultaneously, equivalent system control parameters is set, equivalent system restriction parameter is set, valve system DC parameter, equivalent system control strategy are set etc., carry out combined optimization, the algorithm of optimization is the Modern Interior Point Optimization Algorithm based on complementary theory;
(6) if idle work optimization is restrained, output waits valve system convergence result, equivalent system control amount form, equivalent system restriction form, the form of equivalent interpretation of result, flow data file;
(7) if idle work optimization is not restrained, adjust parameter setting, recalculate, until convergence;
(8), according to result of calculation, form new flow data file, and carry out result with original flow data file and compare.
Compared with prior art scheme, the invention has the beneficial effects as follows:
Set up the Mathematical Modeling of the idle work optimization based on the complementary Optimum Theory of modern interior-point, analyze operation of power networks data, realize electrical network and specify the reactive Voltage Optimum operation between the electric pressure under operational mode, rationally switching the capacitor of the whole network, adjusted load tap changer, coordinate to control quality of voltage and the reactive power flow between each electric pressure, guarantee that quality of voltage meets relevant laws and regulations of the state and " guiding rules of power system safety and stability ", " power system voltage and var technology guide rule " and Its Relevant Technology Standards, has reduced the Network Loss Rate of the whole network simultaneously.According to optimizing the result of calculating, provide corresponding regulation measure and suggestion, OPTIMAL REACTIVE POWER operational mode is calculated and is analyzed to be directly used in and instructs the day of establishment electrical network, monthly, annual reactive voltage operational mode.Its effect of optimization has international most advanced level.
Can make the reactive voltage operational mode of electrical network become simple, workflow and formulation time are shortened, alleviate operations staff's working strength and pressure, improve quality of voltage and the security and stability of operation of power networks comprehensively, its General design can conveniently be applied to the reactive voltage analysis and optimization of each provincial, region and County Power Grid, determines idle operation optimal way, reduces via net loss, solve many-sided problems such as idle planning and designing and operation, application prospect is extensive.
Accompanying drawing explanation:
Fig. 1 is idle work optimization calculating support composition of the present invention;
Fig. 2 is optimal load flow calculation flow chart of the present invention;
Fig. 3 is voltage comparison diagram before and after optimization of the present invention.
Embodiment:
Below in conjunction with drawings and Examples, technical scheme of the present invention is described in further detail.
As shown in Figure 1, the medium-term and long-term reactive voltage analysis of a kind of electric power system and optimization method, comprise the steps:
1, flow data file is carried out to Equivalent Network;
2, carry out idle work optimization, equivalent system parameters is set simultaneously, equivalent system control parameters is set, equivalent system restriction parameter is set, valve system DC parameter is set etc., equivalent system control strategy, carries out combined optimization;
If 3 idle work optimization convergences, output waits valve system convergence result, equivalent system control amount form, equivalent system restriction form, the form of equivalent interpretation of result, flow data file;
If 4 idle work optimizations are not restrained, adjust parameter setting, recalculate, until convergence;
5,, according to result of calculation, form new flow data file, and carry out result with original flow data file and compare.
Referring to Fig. 2, under the framework of modern interior-point Optimum Theory, the network equivalence network analysis operation of power networks data that obtain according to given flow data file, realize electrical network and specify the reactive Voltage Optimum operation between the electric pressure under operational mode, coordinate to control the quality of voltage between each electric pressure, meet grid company quality of voltage and var administrative standard, according to optimizing the result of calculating, provide corresponding regulation measure and suggestion, comprising: the control magnitude of voltage of PV node and balance node; The gear of adjustable transformer tap; The switching gear of adjustable condenser and Reactor banks; Controlled unit meritorious exerted oneself etc.
Under the framework of modern interior-point Optimum Theory, the network equivalence network analysis operation of power networks data that obtain according to given flow data file, realize electrical network and specify the reactive Voltage Optimum operation between the electric pressure under operational mode, coordinate to control the quality of voltage between each electric pressure, meet grid company quality of voltage and var administrative standard, according to optimizing the result of calculating, provide corresponding regulation measure and suggestion, comprise the control magnitude of voltage of PV node and balance node, the gear of adjustable transformer tap, the switching gear of adjustable condenser and Reactor banks, controlled unit meritorious exerted oneself etc., OPTIMAL REACTIVE POWER operational mode is calculated and is analyzed and can be directly used in the day of instructing establishment electrical network, monthly, the reactive voltage operational mode in year.
In flow data verification when computing module is optimized after result, following partly or entirely result will be write in flow data file by the form of flow data: the control magnitude of voltage of PV node and balance node, the gear of adjustable transformer tap, the switching gear of adjustable condenser and Reactor banks, the meritorious of controlled unit exerted oneself.
New flow data file will be obtained by the time, automatically carry out trend calculating simultaneously, analytical Calculation result, by trend the results list comparison of the trend result of former flow data file, optimal result and new trend data file, wherein, due to equivalent relation, the result of optimal result and new trend data file is very close, but can be not in full accord.
As shown in Figure 2, optimal load flow calculation process of the present invention, comprises the steps:
1, select flow data file;
2, carry out idle work optimization, equivalent system parameters is set simultaneously, equivalent system control parameters is set, equivalent system restriction parameter is set, valve system DC parameter is set etc., equivalent system control strategy, carries out combined optimization;
If 3 idle work optimization convergences, output waits valve system convergence result, equivalent system control amount form, equivalent system restriction form, the form of equivalent interpretation of result, flow data file;
If the convergence of the result of 4 flow data trend calculation checks, carries out Equivalent Network to the electric network data of input, equivalence goes out the data of required network, re-starts trend and calculates check, until calculate convergence.
Take China's somewhere actual electric network as example, the reactive power of rich large mode in 2011 is carried out to analysis optimization.Analytical procedure is as follows:
1, this electric network swim data file is carried out to Equivalent Network, obtaining this system has 958 nodes, 502 circuits, 104 generators, 215 on-load tap-changing transformers, 183 reactive power compensation points.
2, carry out idle work optimization, equivalent system parameters is set simultaneously, the setting of control variables parameter comprises: meritorious exert oneself, idlely exert oneself, transformer tapping, capacity reactance device switching group number.
If 3 idle work optimization convergences, output waits valve system convergence result, as shown in all tables: send power situation under optimization front and back 500kV transformer station is comprehensive; The rich large mode of electrical network is optimized front and back Network Loss Rate situation; Certain electrical network 500kV reactive compensation capacity of substation summary sheet before optimizing; Certain electrical network 500kV reactive compensation capacity of substation summary sheet after optimizing; Certain electrical network 220kV reactive compensation capacity of substation summary sheet before and after optimizing; Optimize certain electrical network 500kV transformer substation voltage and 220kV side trend situation under front large mode; Optimize certain electrical network 500kV transformer substation voltage and 220kV side trend situation under rear large mode; The out-of-limit situation analysis of certain electrical network grade busbar voltage before optimizing.
If 4 idle work optimizations are not restrained, adjust parameter setting, recalculate, until convergence.
Referring to Fig. 3, in the idle work optimization of practical power systems, successful of the present invention.After optimizing, the 500kV 500kV of transformer station side bus voltage obviously improves, and meets the requirement of line voltage, send power factor obviously to improve under comprehensive, refers to table 1.Due to reasonable switching the capacitor of the whole network, adjusted load tap changer, the electric voltage equalization degree of 220kV significantly improves, and all maintains 230kV left and right.Particularly original voltage area higher or on the low side, by the increase and decrease idle adjustment measure such as the reactive power in power plant and the capacitor of the corresponding transformer station of switching around, its 220kV voltage levvl has obtained effective control.By electrical network global optimization, the line loss rate of electrical network has obtained effective control, and Network Loss Rate reduces to 3.155% from 3.2459%, and network loss situation refers to table 2.
Under table 1 optimization front and back 500kV transformer station is comprehensive, send power situation
The rich large mode of table 2 electrical network is optimized front and back Network Loss Rate situation
| Project | Total output power (MW) | Total active power loss (MW) | Network Loss Rate (%) |
| Loss situation before optimizing | 15234.5 | 494.5 | 3.2459 |
| Loss situation after optimizing | 15220.2 | 480.2 | 3.1550 |
Before optimization of the present invention, certain electrical network 500kV reactive compensation capacity of substation summary sheet is as shown in table 3, and after optimizing, certain electrical network 500kV reactive compensation capacity of substation summary sheet is as shown in table 4.
Table 3 is optimized front certain electrical network 500kV reactive compensation capacity of substation summary sheet unit: Mvar
Table 4 is optimized rear certain electrical network 500kV reactive compensation capacity of substation summary sheet unit: Mvar
Before and after optimization of the present invention, certain electrical network 220kV reactive compensation capacity of substation summary sheet is as shown in table 5.
Table 5 is optimized certain electrical network 220kV reactive compensation capacity of substation summary sheet unit of front and back: MVA, Mvar
Under large mode of the present invention, certain electrical network 500KV transformer substation voltage and 220KV side trend situation are as follows, before optimizing, certain electrical network 500kV transformer substation voltage and 220kV side trend situation are as shown in table 6, and after optimizing, certain electrical network 500kV transformer substation voltage and 220kV side trend situation are as shown in table 7.
Table 6 is optimized certain electrical network 500kV transformer substation voltage and 220kV side trend situation under front large mode
Table 7 is optimized certain electrical network 500kV transformer substation voltage and 220kV side trend situation under rear large mode
The present invention analyzes quality of voltage, and before optimizing, the out-of-limit situation of the each electric pressure busbar voltage of certain electrical network is as shown in table 8, and after optimizing, the out-of-limit situation of certain electric network voltage is as shown in table 9.
Table 8 is optimized the front out-of-limit situation analysis of certain electrical network grade busbar voltage
Table 9 is optimized the rear out-of-limit situation analysis of certain electrical network grade busbar voltage
Claims (1)
1. the medium-term and long-term reactive voltage analysis of electric power system and an optimization method, is characterized in that, the method comprises the following steps:
(1) select flow data file, large system parameters is set, large system control parameters is set, large system restriction parameter is set, large system DC parameter is set, the data of input are carried out to trend calculation check, if the result of trend calculation check does not restrain, calculate by large system optimal trend, if the convergence of the result of trend calculation check proceeds to step (3);
(2) form large system convergence result, large system control amount form, large system restriction form, output flow data file;
(3) if the convergence of the result of trend calculation check is carried out Equivalent Network to the electric network data of input, equivalence goes out the data of required network, re-starts trend and calculates check, until calculate convergence;
(4) flow data file is carried out to Equivalent Network;
(5) Mathematical Modeling of the idle work optimization of the complementary Optimum Theory of the modern interior-point based on having set up, carry out idle work optimization, equivalent system parameters is set simultaneously, equivalent system control parameters is set, equivalent system restriction parameter is set, valve system DC parameter is set etc., equivalent system control strategy is set, carry out combined optimization, the algorithm of optimization is the Modern Interior Point Optimization Algorithm based on complementary theory;
(6) if idle work optimization is restrained, output waits valve system convergence result, equivalent system control amount form, equivalent system restriction form, the form of equivalent interpretation of result, flow data file;
(7) if idle work optimization is not restrained, adjust parameter setting, recalculate, until convergence;
(8), according to result of calculation, form new flow data file, and carry out result with original flow data file and compare.
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| CN103124072B (en) * | 2012-12-21 | 2015-04-22 | 辽宁省电力有限公司电力科学研究院 | Load characteristic considered power grid dynamic reactive power optimization system and method |
| CN112258057A (en) * | 2020-10-27 | 2021-01-22 | 国网山东省电力公司昌邑市供电公司 | Analysis system capable of improving rural voltage qualification rate |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101106274A (en) * | 2007-08-23 | 2008-01-16 | 上海交通大学 | Powerless voltage automatic control system for area power grid |
| CN101409447A (en) * | 2008-11-27 | 2009-04-15 | 浙江大学 | Method for optimizing electric power system tide base on part automatic differential technology |
| CN101520812A (en) * | 2009-04-15 | 2009-09-02 | 天津市电力公司 | Power system dynamic equivalence method based on niche immune algorithm |
| CN101944742A (en) * | 2010-08-30 | 2011-01-12 | 天津大学 | Improved power flow feasible solution recovering method |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101106274A (en) * | 2007-08-23 | 2008-01-16 | 上海交通大学 | Powerless voltage automatic control system for area power grid |
| CN101409447A (en) * | 2008-11-27 | 2009-04-15 | 浙江大学 | Method for optimizing electric power system tide base on part automatic differential technology |
| CN101520812A (en) * | 2009-04-15 | 2009-09-02 | 天津市电力公司 | Power system dynamic equivalence method based on niche immune algorithm |
| CN101944742A (en) * | 2010-08-30 | 2011-01-12 | 天津大学 | Improved power flow feasible solution recovering method |
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