基于动态量测量的电压失稳性判据研究-电力系统保护与控制.PDF

第42 卷 第24 期 电力系统保护与控制 Vol.42 No.24 2014 年 12 月 16 日 Power System Protection and Control Dec. 16, 2014 基于动态量测量的电压失稳性判据研究 1 1 2 1 马兆兴 ，李洪美 ，万秋兰 ，柴艳莉 (1.江苏师范大学电气工程及自动化学院，江苏 徐州 221116；2.东南大学电气工程学院，江苏 南京 210096) 摘要：广域测量系统的发展和应用为电压稳定性的在线监测奠定了基础。研究基于动态量测量的电压稳定性判别成为新的挑 战。在综合分析 P -V 曲线和 V -Q 曲线特性的基础上，解释了电力系统电压失稳的机理并提出了一种跟踪动态量测量的判断 扰动后电力系统电压是否失稳的判据。所提判据依据扰动后母线电流、功率及有功和无功的变化规律判断电压是否失稳；该 判据原理清晰，计算简捷。EPRI-36 节点系统不同工况下数值仿真结果验证了所提判据的正确性和有效性。 关键词：电压稳定；相量测量单元；电力系统；功率电流曲线；失稳判据 Study on voltage instability criterion based on dynamic measurement 1 1 2 1 MA Zhao-xing , LI Hong-mei , WAN Qiu-lan , CHAI Yan-li (1. School of Electrical Engineering Automation, Jiangsu Normal University, Xuzhou 221116, China; 2. School of Electrical Engineering, Southeast University, Nanjing 210096, China) Abstract: The development and applications of wide-area measurement system provide great potential for online assessment of voltage stability in power system. The study of voltage stability is considered as new challenge based on dynamic measurement. Power system voltage instability mechanism is explained based on character of P-V curve and V-Q curve, and the criterion is given that be able to estimate voltage instability by following dynamic measurement. The criterion can be used to estimate voltage instability according to the trend of change of current, power, active power and reactive power after disturbance. Moreover, the crit