戴维南等值参数时域仿真跟踪算法分析与改进  

Analysis and improvement of Thevenin equivalent parameter tracking based on time-domain simulation

作　　者：赵建伟[1] 严正[1] 徐潇源 冯楠[2] 崔勇[2] 曹路[3] 李建华[3] 

机构地区：[1]上海交通大学电气工程系电力传输与功率变换控制教育部重点实验室,上海200240 [2]国网上海市电力公司电力科学研究院,上海200437 [3]华东电网有限公司,上海200210

出　　处：《电力自动化设备》2017年第7期115-122,共8页Electric Power Automation Equipment

基　　金：国家电网公司科技项目(52094015001S)~~

摘　　要：从物理意义和数学假设两方面对现有的2种基于时域仿真的戴维南等值参数跟踪算法进行了详细的分析,揭示了两者共同的本质和算法实现上的差异。针对系统中所有负荷节点的处理方式,对现有2种算法进行了修正,使两者在物理本质、数学前提和计算结果三方面实现了统一。在统一现有算法的基础上,为了尽量减小"两状态法"可能带来的误差,以原算法的前提假设为出发点,对不同类型的发电机节点和负荷节点分别按照不同的方式进行处理,提出了改进的戴维南等值参数时域仿真跟踪算法。以等阻抗模判据为依据,通过稳态和暂态实例验证了改进算法能够更加准确地判断电力系统的电压稳定性。Two existing algorithms of Thevenin equivalent parameter tracking based on time-domain simulation are analyzed in the aspects of physical significance and mathematical assumption to reveal the implementation difference between two algorithms as well as their common essence. Both algorithms are modified and unified in physical essence,mathematical premise and calculative result for handling all the load nodes of system. Based on the unified algorithms,an improved algorithm of Thevenin equivalent parameter tracking based on time-domain simulation is proposed,which,based on its premises,handles different types of generation node and load node in different approaches to minimize the possible errors induced by ＂two-state method＂. Based on the equal-impedance criterion,case study for steady-state and transient conditions verifies that the improved algorithm can judge the voltage stability of power system more accurately.

关 键 词：戴维南等值参数 时域仿真 跟踪算法 电压稳定 

分 类 号：TM711[电气工程—电力系统及自动化]