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中文摘要：
提出了一种优化变压器分接头档位,以提高系统电压稳定裕度的新算法。该算法通过连续潮流计算得到负荷裕度,在基本遗传算法中引入小生境算子,保证群体的多样性,同时充分发挥梯度算子在局部寻优能力上的优势,求得合理的变压器变比。对IEEE39节点系统的计算结果表明：通过合理设置变压器分接头,可明显增加系统的负荷裕度,达到电压稳定预防控制的目的,新算法的寻优能力强,且计算速度较遗传算法有显著提高。
英文摘要：
A new algorithm is presented to improve the voltage stability with the modification of transformer taps.The load margin is calculated by continuation power flow method,and the ecological niche technique is used in the genetic algorithm to keep the diversity of colonies and take good advantage of gradient operator on local optimization.Then the reasonable tap of transformer is obtained.The results of IEEE 39-bus standard network show that the voltage stability of a power system can be improved by the optimal modification of transformer taps,so the preventive control of voltage stability can be reached.The optimization ability of the proposed algorithm is strong,and its computational speed is more accelerate compared with genetic algorithm.
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