考虑分布式电源影响的分层分区精细化切负荷方法

When a DC transmission line or a large generator is tripped, load shedding scheme should be conducted to maintain receiving system stable. Traditional load shedding strategy is not suitable for distribution networks with high penetration of distributed generations (DGs), possibly leading to unexpected DGtripping. This paper proposes a hierarchal load shedding architecture, where the receiving system is divided into several control areas. For each control area, its external equivalent network model is identified using local measurements and incorporated into optimization model for load shedding. Furthermore, the second-order cone relaxation technique is used to transform the original non-convex model into the second-order cone programming(SOCP). This SOCP model could be solved with CPLEX efficiently. Numerical tests on integrated transmission and distribution networks validate the proposed method.