适应分布式电源的输配电网协调潮流算法

针对未来分布式电源逐渐增多的背景,输、配电网间潮流耦合关系将趋于复杂化,必须将输电网、配电网潮流统一进行分析。对此,建立了以输电网与配电网边界节点电压为协调变量的全局电网分解协调计算方法,其协调量来自电压无功灵敏度,分解协调的信息就地采集,易于实施。通过算例验证表明,该方法不但能适应当前电网潮流的统一计算,而且对于分布式发电占相当比例的未来电网同样具有很好的适应性。

A Coordination Power Flow Algorithm for Power Transmission-Distribution Grid Accommodate Distributed Generations

In allusion to the tendency of gradually increasing of distributed power supply in the future, the coupling between power transmission grid and power distribution grid will become more and more complex, and the power flow of the two should be analyzed uniformly. To deal with that problem,a decomposition-coordination calculation method is proposed,in which the voltage of the boundary nodes between power transmission grid and power distribution grid is used as the coordinating variable and the sensitivity of bus voltage to reactive power is also considered. The information needed for the coordination method can be obtained locally,which makes that the whole algorithm can be implemented easily. Simulation resuhs show that the proposed method can not only be applied to the unified power flow calculation for the current power grid but also for the that future power grid in which distributed generation occupies a considerable proportion.