有功和无功交替优化的电力系统最佳潮流计算

本文把电力系统最佳潮流的计算分离为有功(P)和无功(Q)两个子优化系统。把等式和不等式约束也分成两部分在相应的子优化中考虑。通过有功和无功的交替优化,结合潮流计算统一起来,达到两者同时优化的目的。在每一个子优化中,控制变量和状态变量相对的要减少一些。特别是在无功优化时,控制变量可以任选Q或V,使收敛性得到了较大改善。在计算方法上,采用共轭梯度法。

OPTIMAL LOAD FLOW BY DECOUPLING INTO REAL AND REACTION POWER OPTIMIZATION

This paper presents a method of resolving the optimal lead flow calculation into two subproblems of optimization, a real power optimization and a reaction power optimization. The equality and inequality coustraints are likewise devided into two groups corresponding to the subproblems. By alternately optimizating the real and the reaction power subproblems and coordinating them with the load flow, a simultaneous optimization of both subproblems can be achieved. Because there are fewer variables in each subproblem than in the original pro- blem, and especially because one can chose Q or V at wil to be the control vari- ables in the reaction subproblem, the calculation speed and convergence are considerably improved. The conjugate gradient method is employed in developing the algorithm.