基于改进多中心-校正内点法的可用输电能力计算

针对采用预测—校正内点法求解可用输电能力时可能出现的校正方向错误的缺点,提出基于改进多中心—校正内点法的可用输电能力计算方法。该方法保留了多中心—校正内点法的校正步,解决了计算过程中因校正方向错误而产生的迭代发散问题。选择以预测校正方向作为预测步的仿射方向,并通过预设逻辑判断,有选择地对预测校正过程中校正方向进行加权优化,进一步提高了计算的收敛性。通过对IEEE标准测试系统和某省电网实际系统的仿真计算,验证了该算法的可行性。

Calculation of Available Transfer Capability Based on Improved Multiple-centrality-correction Interior Point Algorithm

In view of the adverse effect of the corrector in calculating available transfer capability with the predictor-corrector interior point method, an improved multiple-centrality-correction interior point algorithm is proposed for this purpose. The proposed algorithm retains the corrector step of the multiple-centrality-correction interior point algorithm, solving the iteration divergence problem due to the wrong corrector direction. In this algorithm, the predictor-corrector direction is selected as the affine direction for the centrality corrector, and the weighted corrector is selective to be added in the predictor corrector direction during each predictor-corrector step through pre-installed logic, thus further improving the convergence. Simulation results of an IEEE test system and a real power system are provided to verify the feasibility of the algorithm.