基于区域无功均分法的环网内变电站关口无功控制

针对环网内传统关口无功控制范围无法有效适应系统运行方式变化的问题,基于无功分层平衡原理,提出一种区域无功均分法对环网内变电站关口无功控制范围进行差异化整定。该方法首先通过对不同负荷水平下输电线路产生的无功盈余量进行迭代均分,形成趋优控制条件下的关口无功控制临界值,然后在考虑全网电压质量合格的前提下对关口无功区间的边界值进行修正,最终形成适应系统不同运行方式的关口无功差异化控制区间。仿真结果表明,该方法可有效控制系统运行在最优状态附近,在不同负荷水平条件下均具有明显的降损效果。

Reactive power control based on ARPSM for substation gateway in loop network

Since the traditional reactive power control range of gateway in loop network cannot adapt effectively to the change of system operating mode, the ARPSM(Area Reactive Power Sharing Method) based on the principle of hierarchical reactive power balance is proposed to differentially set the reactive power control range of gateway in loop network, which shares the reactive power surpluses produced by the transmission lines at different load levels iteratively to obtain the critical value of reactive power control of gateway in the optimizing control condition and then, while the voltage quality of entire network is guaranteed, revises the boundary of reactive power range of gateway to set differential reactive power control range of gateway for adapting to different system operating modes. Simulative results show that, the proposed method effectively controls the system operation near the optimal condition and significantly reduce the power loss at different load levels.