基于改进步长连续潮流法的电压稳定性分析  

Analysis of Voltage Stability in Improved Step Size Continuation Method

作　　者：谢冬冬 刘鑫 潘雪晴 刘德仁 XIE Dongdong;LIU Xin;PAN Xueqing;LIU Deren(State Grid Jiaozuo Power Supply Company,Jiaozuo,Henan 454000,China;State Grid Henan Electric Power Research Institute,Zhengzhou,Henan 450000,China)

机构地区：[1]国网焦作供电公司,河南焦作454000 [2]国网河南省电力科学研究院,河南郑州450000

出　　处：《东北电力技术》2018年第9期44-46,58,共4页Northeast Electric Power Technology

摘　　要：连续潮流法是分析系统电压稳定性的重要工具,能准确地求出电压稳定临界点,但只依靠传统连续潮流法来求取电压稳定临界点将需要很大的计算量和很长时间。因此,首先对戴维南等值原理进行扩充,证明达到极限传输功率的条件,并基于此提出二分法来改进步长从而达到减少计算量和降低时耗的目的,同时还提出最小等值阻抗变化百分数的概念,并由此来确定何时进一步改进步长以达到快速精确找到电压稳定临界点的目的。IEEE14节点系统仿真结果表明该算法能够快速准确找到电压稳定临界点。Continuation method is the important tool of the system voltage stability analysis.It can accurately calculate voltage stability critical point,but it only relys on the traditional continuation method to calculate the voltage stability critical point requiring a great amount of calculation and time.So firstly it expands the thevenin equivalent principle and proves the condition of reaching the limit transmission power.Based on this,the binary method is proposed to modify the step size to reduce the calculation amount and time consumption.At the same time,the concept of the minimum equivalent impedance change percentage is also put forward.It determines when to further modify the step size in order to achieve the purpose of quickly and to accurately find the voltage stability critical point.The simulation results of IEEE14 node system shows that the algorithm can find the voltage stability critical point quickly and accurately.

关 键 词：电压稳定 二分法 广义戴维南等值原理 连续潮流 改进步长 

分 类 号：TM712[电气工程—电力系统及自动化]