基于P-Q解耦变换的智能电网状态估计算法
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摘要
针对传统的电力系统状态估计算法存在计算精度低,运算时间成本高的问题,提出了一种基于P-Q解耦变换的电力系统状态估计算法.该算法将支路功率量测、负荷量测与电压电流幅值量测进行解耦.保留解耦后的非线性迭代表达式,得到变换后的功率表达式,并完成状态估计的优化计算. IEEE标准节点系统的测试计算结果表明,所提出的算法能够适用于不同网络拓扑结构的研究,并可以满足计算精度和计算时间的要求.
In order to solve the lowcomputing precision and high cost of computing time in the state estimation algorithm for the traditional power system,a state estimation algorithm of power system based on the P-Q decoupling transformation was proposed. The power measurement,load measurement as well as the voltage and current amplitude measurement were decoupled in the proposed algorithm. In addition,the nonlinear iterative expression after decoupling was retained,the power expression after transformation was obtained,and the optimization computing of state estimation was completed. The test and computing results of IEEE standard node system showthat the proposed algorithm can be applied to the research of different network topological structures,and can meet the requirements for computing precision and time.
In order to solve the lowcomputing precision and high cost of computing time in the state estimation algorithm for the traditional power system,a state estimation algorithm of power system based on the P-Q decoupling transformation was proposed. The power measurement,load measurement as well as the voltage and current amplitude measurement were decoupled in the proposed algorithm. In addition,the nonlinear iterative expression after decoupling was retained,the power expression after transformation was obtained,and the optimization computing of state estimation was completed. The test and computing results of IEEE standard node system showthat the proposed algorithm can be applied to the research of different network topological structures,and can meet the requirements for computing precision and time.
引文
[1]汤涌,郭强,周勤勇,等.特高压同步电网安全性论证[J].电网技术,2016,40(1):97-104.(TANG Yong,GUO Qiang,ZHOU Qin-yong,et al.Security evaluation for UHV synchronized pow er grid[J].Power System Technology,2016,40(1):97-104.)
[2]翟化欣.层次分析法和神经网络的电网安全评估[J].现代电子技术,2016,39(21):168-171.(ZHAI Hua-xin.AHP and neural network for power grid safety assessment[J].M odern Electronics Technique,2016,39(21):168-171.)
[3]童晓阳,王晓茹.乌克兰停电事件引起的网络攻击与电网信息安全防范思考[J].电力系统自动化,2016,40(7):144-148.(TONG Xiao-yang,WANG Xiao-ru.Inference and countermeasure presupposition of netw ork attack in incident on ukrainian pow er grid[J].Automation of Electric Pow er System,2016,40(7):144-148.)
[4]胡勇.主动配电网用户侧能量管理系统设计与实现[J].电力系统保护与控制,2016,44(16):149-155.(HU Yong.Design and implementation of user energy management system on active distribution netw ork[J].Power System Protection and Control,2016,44(16):149-155.)
[5]鲁文,李卫星,杜红卫,等.主动配电网综合能量管理系统设计与应用[J].电力系统自动化,2016,40(8):133-139.(LU Wen,LI Wei-xing,DU Hong-wei,et al.Design and application of integrated energy management system in active distribution netw ork[J].Automation of Pow er System,2016,40(8):133-139.)
[6]黄小娟.PMU在电力系统状态估计中的应用[D].成都:西南交通大学,2016.(HUANG Xiao-juan.The application of PMU in state estimation of pow er system[D].Chengdu:Southw est Jiaotong University,2016.)
[7]董今妮,孙宏斌,郭庆来,等.面向能源互联网的电-气耦合网络状态估计技术[J].电网技术,2018(2):53-58.(DONG Jin-ni,SUN Hong-bin,GUO Qing-lai,et al.State estimation of combined electric-gas netw orks for energy internet[J].Pow er System Technology,2018(2):53-58.)
[8]蔡昌春,丁晓群,王斌.基于改进最小二乘法的电力系统状态估计[J].浙江电力,2006,25(4):6-9.(CAI Chang-chun,DING Xiao-qun,WANG Bin.State estimation of pow er system based on improved least-squears algorithm[J].Zhejiang Electric Pow er,2006,25(4):6-9.)
[9]孙一冰.分布式动态状态估计算法及其在电力系统中的应用[D].济南:山东大学,2017.(SUN Yi-bing.Distributed dynamic sate estimation agorithm and application in pw er system[D].Jinan:Shandong University,2017.)
[10]何光宇,常乃超,董树锋,等.基于集合论估计的电网状态辨识建模[J].电力系统自动化,2016(5):25-31.(HE Guang-yu,CHANG Nai-chao,DONG Shu-feng,et al.Pow er system state identification based on set theory estimation part one modeling[J].Automation of Electric Pow er System,2016(5):25-31.)
[11]侯方迪.基于总体误差下降指标和MIQP模型的参数辨识方法研究[D].杭州:浙江大学,2017.(HOU Fang-di.Research on parameter identification method based on global error descent index and M IQPmodel[D].Hangzhou:Zhejiang University,2017.)
[12]刘峰.EMS中状态估计模块生产运行及实用化问题分析[J].电力自动化设备,2007,27(4):118-123.(LIU Feng.Operation and practicability of state estimation module in EM S[J].Electric Pow er Automation Equipment,2007,27(4):118-123.)
[13]兰华,李积捷.电力系统状态估计算法的研究现状和展望[J].电力系统保护与控制,2007,35(10):78-82.(LAN Hua,LI Ji-jie.Status quo and prospect of algorithm of pow er system state estimation[J].Pow er System Protection and Control,2007,35(10):78-82.)
[14]刘柳,高会生,李成.电力SCADA系统传输网安全性评估模型[J].电子科技,2012,25(12):116-119.(LIU Liu,GAO Hui-sheng,LI Cheng.Security assessment model of pow er SCADA system netw orks[J].Electronic Science and Technology,2012,25(12):116-119.)
[15]刘颖.基于抗差最小二乘法的谐波状态估计方法研究[D].保定:华北电力大学,2012.(LIU Ying.Research on harmonic state estimation method based on robust least square method[D].Baoding:North China Electric Pow er University,2012.)
[16]Martin K E,Benmouyal G,Adamiak M G,et al.IEEEstandard for synchrophasors for pow er systems[J].IEEE Transactions on Pow er Delivery,2006,13(1):73-77.
[17]Meliopoulos A P S,Cokkinides G,Huang R,et al.Smart grid technologies for autonomous operation and control[J].IEEE Transactions on Smart Grid,2011,2(1):1-10.
[2]翟化欣.层次分析法和神经网络的电网安全评估[J].现代电子技术,2016,39(21):168-171.(ZHAI Hua-xin.AHP and neural network for power grid safety assessment[J].M odern Electronics Technique,2016,39(21):168-171.)
[3]童晓阳,王晓茹.乌克兰停电事件引起的网络攻击与电网信息安全防范思考[J].电力系统自动化,2016,40(7):144-148.(TONG Xiao-yang,WANG Xiao-ru.Inference and countermeasure presupposition of netw ork attack in incident on ukrainian pow er grid[J].Automation of Electric Pow er System,2016,40(7):144-148.)
[4]胡勇.主动配电网用户侧能量管理系统设计与实现[J].电力系统保护与控制,2016,44(16):149-155.(HU Yong.Design and implementation of user energy management system on active distribution netw ork[J].Power System Protection and Control,2016,44(16):149-155.)
[5]鲁文,李卫星,杜红卫,等.主动配电网综合能量管理系统设计与应用[J].电力系统自动化,2016,40(8):133-139.(LU Wen,LI Wei-xing,DU Hong-wei,et al.Design and application of integrated energy management system in active distribution netw ork[J].Automation of Pow er System,2016,40(8):133-139.)
[6]黄小娟.PMU在电力系统状态估计中的应用[D].成都:西南交通大学,2016.(HUANG Xiao-juan.The application of PMU in state estimation of pow er system[D].Chengdu:Southw est Jiaotong University,2016.)
[7]董今妮,孙宏斌,郭庆来,等.面向能源互联网的电-气耦合网络状态估计技术[J].电网技术,2018(2):53-58.(DONG Jin-ni,SUN Hong-bin,GUO Qing-lai,et al.State estimation of combined electric-gas netw orks for energy internet[J].Pow er System Technology,2018(2):53-58.)
[8]蔡昌春,丁晓群,王斌.基于改进最小二乘法的电力系统状态估计[J].浙江电力,2006,25(4):6-9.(CAI Chang-chun,DING Xiao-qun,WANG Bin.State estimation of pow er system based on improved least-squears algorithm[J].Zhejiang Electric Pow er,2006,25(4):6-9.)
[9]孙一冰.分布式动态状态估计算法及其在电力系统中的应用[D].济南:山东大学,2017.(SUN Yi-bing.Distributed dynamic sate estimation agorithm and application in pw er system[D].Jinan:Shandong University,2017.)
[10]何光宇,常乃超,董树锋,等.基于集合论估计的电网状态辨识建模[J].电力系统自动化,2016(5):25-31.(HE Guang-yu,CHANG Nai-chao,DONG Shu-feng,et al.Pow er system state identification based on set theory estimation part one modeling[J].Automation of Electric Pow er System,2016(5):25-31.)
[11]侯方迪.基于总体误差下降指标和MIQP模型的参数辨识方法研究[D].杭州:浙江大学,2017.(HOU Fang-di.Research on parameter identification method based on global error descent index and M IQPmodel[D].Hangzhou:Zhejiang University,2017.)
[12]刘峰.EMS中状态估计模块生产运行及实用化问题分析[J].电力自动化设备,2007,27(4):118-123.(LIU Feng.Operation and practicability of state estimation module in EM S[J].Electric Pow er Automation Equipment,2007,27(4):118-123.)
[13]兰华,李积捷.电力系统状态估计算法的研究现状和展望[J].电力系统保护与控制,2007,35(10):78-82.(LAN Hua,LI Ji-jie.Status quo and prospect of algorithm of pow er system state estimation[J].Pow er System Protection and Control,2007,35(10):78-82.)
[14]刘柳,高会生,李成.电力SCADA系统传输网安全性评估模型[J].电子科技,2012,25(12):116-119.(LIU Liu,GAO Hui-sheng,LI Cheng.Security assessment model of pow er SCADA system netw orks[J].Electronic Science and Technology,2012,25(12):116-119.)
[15]刘颖.基于抗差最小二乘法的谐波状态估计方法研究[D].保定:华北电力大学,2012.(LIU Ying.Research on harmonic state estimation method based on robust least square method[D].Baoding:North China Electric Pow er University,2012.)
[16]Martin K E,Benmouyal G,Adamiak M G,et al.IEEEstandard for synchrophasors for pow er systems[J].IEEE Transactions on Pow er Delivery,2006,13(1):73-77.
[17]Meliopoulos A P S,Cokkinides G,Huang R,et al.Smart grid technologies for autonomous operation and control[J].IEEE Transactions on Smart Grid,2011,2(1):1-10.