震后紧急供电的电力网络安全检测研究
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摘要
当前震后紧急供电安全检测方法忽略了电网节点的三相电流不对称问题,未计算电力网络节点功率、支路电流及网损,导致电力网络进行节点连通安全检测准确率低。据此提出震后紧急供电的电力网络安全检测方法,根据连通度矩阵电力网络节点的工作参数,电力网络潮流计算不同节点的电压向量。利用快速耦合法优化牛顿拉夫逊法的计算速度,求出节点功率、支路电流及网损数值。以所构建的电力网络节点连通安全检测模型为基础,采用蒙特卡洛方法完成震后紧急供电的电力网络安全检测。经实验证明,所提方法可有效检测震后紧急供电的电力网络节点安全性,当震动加速度分别为0.05 gal、0.20 gal、0.80 gal时,实验对象连通安全检测结果分别为较高、中等和极低状态,与实际结果均一致,说明所提方法能准确检测电力网络节点连通的安全性。
Current safety detection methods for emergency power supply following an earthquake generally ignore the three-phase current asymmetry of the power grid node; nor are node power of the network, branch current, and network loss calculated. This results in low accuracy in node network safety detection. Based on this premise, a power network security detection method for emergency power supply following earthquakes is proposed. According to the operation parameters of the connectivity matrix power network node, the voltage vector of different nodes was obtained using the power flow calculation. The fast-coupled method was used to optimize the calculation speed of the Newton-Raphson method, and node power, branch current, and network loss values were calculated. Based on the constructed safety detection model of the power network node connectivity, the Monte Carlo method was used to accomplish the power network security detection for emergency power supply following an earthquake. The experimental results showed that the proposed method could effectively detect the safety of power network nodes for post-earthquake emergency power supply. When the vibration acceleration was 0.05 gal, 0.20 gal, and 0.80 gal, the safety test results of the experimental objects were high, medium, and extreme, respectively, which was consistent with the actual results, and indicated that the proposed method can also accurately detect the security of the connectivity of power network nodes.
Current safety detection methods for emergency power supply following an earthquake generally ignore the three-phase current asymmetry of the power grid node; nor are node power of the network, branch current, and network loss calculated. This results in low accuracy in node network safety detection. Based on this premise, a power network security detection method for emergency power supply following earthquakes is proposed. According to the operation parameters of the connectivity matrix power network node, the voltage vector of different nodes was obtained using the power flow calculation. The fast-coupled method was used to optimize the calculation speed of the Newton-Raphson method, and node power, branch current, and network loss values were calculated. Based on the constructed safety detection model of the power network node connectivity, the Monte Carlo method was used to accomplish the power network security detection for emergency power supply following an earthquake. The experimental results showed that the proposed method could effectively detect the safety of power network nodes for post-earthquake emergency power supply. When the vibration acceleration was 0.05 gal, 0.20 gal, and 0.80 gal, the safety test results of the experimental objects were high, medium, and extreme, respectively, which was consistent with the actual results, and indicated that the proposed method can also accurately detect the security of the connectivity of power network nodes.
引文
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[14] 王延忠,郭超,宁克焱,等.Cu基粉末冶金摩擦元件接触压力仿真与试验[J].哈尔滨工业大学学报,2018,50(1):134-140.WANG Yanzhong,GUO Chao,NING Keyan.et al.Sintered Bronze Friction Pair Contact Pressure Simulation and Experiment[J].Journal of Harbin Institute of Technology,2018,50(1):134-140.
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[2] 李兆伟,刘福锁,崔晓丹,等.计及电力安全事故风险的电网动态分区与切负荷协调控制研究[J].电力系统保护与控制,2017,45(1):35-40.LI Zhaowei,LIU Fusuo,CUI Xiaodan,et al.Coordinate Control Study for Dynamic Division and Load Shedding Considering Electrical Security Accident risk[J].Power System Protection and Control,2017,45(1):35-40.
[3] 金鑫,李龙威,苏国华,等.基于Spark框架和PSO优化算法的电力通信网络安全态势预测[J].计算机科学,2017,44(增刊1):366-371.JIN Xin,LI Longwei,SU Guohua,et al.Prediction about Network Security Situation of Electric Power Telecommunication Based on Spark Framework and PSO Algorithm[J].Computer Science,2017,44(Supp1):366-371.
[4] 杨建林,房岭锋,余涛,等.考虑网络安全约束的电力直接交易仿真方法[J].电力系统及其自动化学报,2017,29(7):61-67.YANG Jianlin,FANG Lingfeng,YU Tao,et al.Simulation Approach for Direct Power Trading Considering Network Security Constraints[J].,2017,29(7):61-67.
[5] 李碧君,侯玉强.紧急负荷调节用于安全稳定紧急控制的研究[J].电力系统保护与控制,2016,44(11):104-110.LI Bijun,HOU Yuqiang.Research of Emergency Load Regulation for Security and Stability Control[J].Power System Protection and Control,2016,44(11):104-110.
[6] 李建明,刘媛,沈晗阳,等.基于2 M业务的电网保护恢复机制研究[J].电力系统保护与控制,2016,44(16):106-111.LI Jianming,LIU Yuan,SHEN Hanyang,et al.Research on the Protection Mechanism of Electric Power Grid Based on 2 M Business[J].Power System Protection and Control,2016,44(16):106-111.
[7] 郭宝宁.面向电力设备的温度检测节点功耗研究及自供电电源设计[J].数据采集与处理,2018,33(6):72-74.GUO Baoning.Power Consumption and Design of Self-powered Energy Management for Temperature Detecting Node Used in Power Systems[J].Journal of Data Acqusition Processing,2018,33(6):72-74.
[8] 赵金利,范朕宁,李鹏,等.基于SUNDIALS的有源配电网随机动态仿真方法[J].电力系统自动化,2017,41(6):51-58.ZHAO Jinli,FAN Zhenning,LI Peng,et al.SUNDIALS Based Stochastic Dynamic Simulation Method of Active Distribution Networks[J].Automation of Electric Power Systems,2017,41(6):51-58.
[9] 黄鑫,陈德成,孙军,等.网络攻击下电力系统信息安全研究综述[J].电测与仪表,2017,54(23):68-74.HUANG Xin,CHEN Decheng,SUN Jun,et al.A Review of Information Security Research in Power System under Cyber Attack[J].Electrical Measurement & Instrumentation,2017,54(23):68-74.
[10] 吴成业,刘光晔,孙瑞,等.应用潮流方程简化网络计算的电力系统小干扰稳定分析[J].电力系统及其自动化学报,2018,30(6):10-15.WU Chengye,LIU Guangye,SUN Rui,et al.Small Signal Stability Analysis of Power System with Simplified Network Computing Using Power Flow Equations[J].Proceedings of the CSU-EPSA,2018,30(6):10-15.
[11] 李倩文,李莹,张荣,等.线性与非线性传热过程的Curzon-Ahlborn热机在任意功率时的效率[J].物理学报,2017,66(13):63-70.LI Qianwen,LI Ying,ZHANG Rong,et al.Efficiency at Arbitrary Power for the Curzon-Ahlborn Heat Engine in Linear and Nonlinear Heat Transfer Processes[J].Acta Physica Sinica,2017,66(13):63-70.
[12] 扈诗扬,杨萌,汪芳宗.基于坐标旋转变换的配电系统快速解耦潮流计算方法[J].电力系统保护与控制,2017,45(4):40-44.HU Shiyang,YANG Meng,WANG Fangzong.et al.A Fast Decoupled Load Flow Method for Distribution System Via Coordinate Rotation Transformation[J].Power System Protection and Control,2017,45(4):40-44.
[13] 黄裕春,王宏,文福拴.含区间数的电力应急网络最优调度路径的确定[J].电力系统及其自动化学报,2015,27(1):19-25.HUANG Yuchun,WANG Hong,WEN Fushuan.Determining of Optimal Scheduling Path in Power Emergency Support Network Represented by Interval Values[J].Proceedings of the CSU-EPSA ,2015,27(1):19-25.
[14] 王延忠,郭超,宁克焱,等.Cu基粉末冶金摩擦元件接触压力仿真与试验[J].哈尔滨工业大学学报,2018,50(1):134-140.WANG Yanzhong,GUO Chao,NING Keyan.et al.Sintered Bronze Friction Pair Contact Pressure Simulation and Experiment[J].Journal of Harbin Institute of Technology,2018,50(1):134-140.
[15] 韦磊,刘锐,高雪,等.电力LTE无线专网安全防护方案研究[J].江苏电机工程,2016,35(3):29-33.WEI Lei,LIU Rui,GAO Xue,et al.Research on Security Protection Solution to LTE Power Wireless Private Network[J].Jiangsu Electrical Engineering,2016,35(3):29-33.