计及暂态电压约束的负荷恢复能力快速计算  

Fast Calculation of Load Restoration Capability Considering Transient Voltage Constraint

作　　者：瞿寒冰[1] 刘玉田[1] 

机构地区：[1]山东大学电气工程学院,山东省济南市250061

出　　处：《电力系统自动化》2009年第15期8-12,共5页Automation of Electric Power Systems

基　　金：国家自然科学基金资助项目(50877044)~~

摘　　要：电力系统恢复过程中,需要确定变电站的单次最大负荷恢复量。通常主要考虑系统频率和稳态电压的约束,文中在此基础上加入了暂态电压安全的约束限制,建立了确定变电站最大负荷恢复量的数学模型。基于描述暂态电压安全问题的二元表,构建了分析暂态电压安全的微分代数方程组,对系统中各部分组成进行适当简化,在保证精度的前提下提高了计算速度。提出一种改进的二分法对模型进行求解,该方法考虑了每次迭代的约束裕度,加快了搜索寻优时的收敛速度。IEEE14节点算例和山东电网仿真结果表明了模型的有效性和方法的快速性。During power system restoration, the maximum restorable load that a substation can pick up at each time should be determined. Frequency constraint and steady-state voltage constraint are normally the main focus in the previous researches. In this paper, to determine the maximum restorable load, the transient voltage security is involved in the mathematical model as a constraint. To solve the proposed model, firstly, a two-element table describing the requirements on transient voltage security for each bus is presented. Then differential-algebraic equations are established to investigate transient voltage security. In order to improve the convergence speed, some system components, such as generators, inductive motors and network, are simplified within certain precision. The modified dichotomy theorem including constraint margins is proposed to solve the established mathematical model resulting in higher convergence speed. Its validity and effectiveness are demonstrated by simulation results of IEEE 14-bus testing system and practical Shandong power system in China.

关 键 词：电力系统恢复 负荷恢复 暂态电压安全 二分法 

分 类 号：TM732[电气工程—电力系统及自动化] TM712