not only can the allocation of the active power losses but also that of the reactive power losses be calculated at the same time . the simplicity and good adapbility of the method is obvious 该方法不仅能计算有功网损的分摊和而且能同时计算无功网损的分摊,计算简单、适应性强、符合电力市场中的实际情况。
reactive power optimization which can improve the quality of system voltage and reduce reactive power loss has not been solved completely because of the complexity of mixed-integer nonlinear programming 电力系统无功优化控制对于提高系统电压质量、降低有功网损具有重要的意义。无功优化问题是非常复杂的非线性混合整数规划问题,一直没有得到很好解决。
the propose method performs ranking of the contingencies using a severity index based on the incremental reactive power losses and of sensitiveness between the base case and contingency base . based on the ranking, a short list of contingencies is to be selected for full simulation 为了减少计算量对预想事故进行了排序、选择出便于最大输电能力求解的集合,为此提出了无功损耗增量指标和l/p_(ij)灵敏度指标的排序方法。
based on the proposed loss allocation rule, a new complex power flow tracing method is put forward, which can be used for power pool model to determine the contributions of individual loads / generators to branch real and reactive power loss and mva flow and then to allocate transmission cost 在本文损耗分摊原则的基础上,提出了能同时考虑有功、无功耦合的复功率潮流追踪算法,可以基于潮流解进行顺流和逆流的追踪,从而得到系统中发电机、负荷对各传输设备的利用份额。
first the paper use the different four network operating condition as the primary given conditions and set the 330 / 220kv transformer tap changer position in the standard position, adding the paralleled capacitor bank sets one by one into the network to change the amount of the input reactive power, thus obtained four sets of the 330kv and 220kv bus voltage and the active and reactive power losses changing curves 进而研究了在每一确定并联补偿电容器组投入量条件下,随联变调压档位变化而产生出的一组并联补偿量、母线电压与损耗的变化曲线。进而选出了陇南电网在四种选定电网运行方式下、有功损耗最小条件下的最优综合控制组合曲线。