电力系统故障恢复过程中的过电压控制  

A METHOD TO CONTROL SUSTAINED OVERVOLTAGE DURING POWER SYSTEM RESTORATION

作　　者：程改红[1] 徐政[1] 

机构地区：[1]浙江大学电机系,浙江省杭州市310027

出　　处：《电网技术》2004年第11期29-33,共5页Power System Technology

基　　金：国家自然科学基金(50277034);国家重点基础研究专项经费资助项目(G1998020310)

摘　　要：针对由空载和轻载线路恢复所引起的过电压问题,文中提出了基于灵敏度分析的确定最有效控制变量及其调节量的方法,引入了有效因子的概念,既考虑了控制变量的电压灵敏度,又综合考虑了设备本身和运行条件的约束及当前状态的调节裕度,确保控制过程中不会产生新的电压越限,通过由该方法确定的有效控制变量对过电压进行了校正,从而使所需的操作数目最少。对IEEE10机39节点测试系统的计算结果表明了该方法的有效性。As to the overvoltage caused by restoration of unloaded or lightly loaded transmission lines, a sensitivity analysis based method to determine the most efficient control variables to correct the voltage violation and their adjusting quantities is proposed. In this method the concept of efficiency coefficient (EC) is defined in which not only the voltage sensitivity of control variable is considered, but also the restraints of the equipments themselves and operating condition as well as the adjustment allowance of current situation are comprehensively considered. Therefore, it can be ensured that no new voltage violation will occur during the control process. By means of the effective control variables, the overvoltage is corrected. thereby, the minimum shifts are needed for the control of overvoltages. The proposed method is verified by IEEE 10-machine and 39- bus testing system, the obtained results show that this method is effective.

关 键 词：电力系统 故障恢复 过电压控制 灵敏度分析 

分 类 号：TM711[电气工程—电力系统及自动化]