短路限流器的配置与优化

讨论了电力系统短路电流计算方程，在此基础上建立了由系统短路电流限值确定限流器阻抗的数学模型。对于单组限流器，该模型为线性方程组，具有唯一解，对于多组限流器则为线性不定方程组，存在多解情况。运用广义逆方法和优化方法，直接从线性不定方程组的相容解集合中求得符合要求的优化解，在系统短路电流不超限条件下实现多组限流器的配置和优化。算法具有非常良好的收敛特性和较快的计算速度，适合大系统应用。许多情况下使用单组限流器不能满足要求，而使用多组限流器则可以有效地将系统短路电流抑制在要求范围内。工程实例验证了算法的有效性和实用性。

Configuration and Optimization for Short Circuit Current Limiter

Equations for calculating short circuit current of power system is discussed , on the basis of which the mathematical model for determine the current limiter impedance with system short circuit current limit values is established. For a single set of current limiter , the model is a set of linear equations with only one solution; for multiple sets of current limiters , the model is a set of linear indeterminate equations with multi-ple solutions. By using generalized inverse method and optimization method , corresponding optimized solution can be obtained directly from compatible solutions of the linear indeterminate equations and the configuration and optimization of multiple sets of current limiters can be implemented without overrunning the short circuit current limit of power system. The algorithm is of favorable convergence and high calculation speed , and hence fits to be applied in the large system. In many cases, Using a single set of current limiter can not meet the requirements, while using multiple sets of current limiters can effectively restrain the short circuit current in the required range. The effectiveness and practicability of the algorithm are verified by engineering practices.