孤岛微电网潮流的类奔德斯分解算法

在传统Newton-Raphson潮流算法中一般仅定义平衡节点、有功功率—电压节点、有功功率—无功功率节点这三类节点,难以直接使用传统Newton-Raphson潮流算法求解含下垂控制策略的微电网潮流问题。提出一种类奔德斯分解的潮流计算新方法,将采用下垂控制策略的孤岛微电网的潮流计算问题分解成传统Newton-Raphson潮流计算子问题和下垂节点更新子问题,通过两个子问题的交替迭代获取潮流解。该方法将一个复杂的原问题分解成了两个简单的子问题,实现了原问题的高效、快速求解。通过算例分析,验证了所提方法的可行性和有效性。

Power Flow Calculation Method Similar to Benders Decomposition for Islanded Microgrid

There are usually only three types of nodes, viz, the slack node, active power-voltage node and active power-reactive power node in the traditional power flow calculation based on Newton-Raphson method. So it is difficult to calculate the power flow of microgrid with droop controlled distributed generators using the traditional Newton-Raphson method directly. A novel power flow calculation method similar to Benders decomposition is proposed. The power flow calculation of islanded microgrid under decentralized droop control strategy is decomposed into a traditional Newton-Raphson power flow calculation sub-problem and a droop control node updating sub-problem, while solving the original problem via the alternative iteration of two sub-problems. In this algorithm, the complex original problem is decomposed into two simple sub-problems, which makes solving the original problem efficient and fast. By the simulation tests on case studies, the feasibility and validity of the proposed methodology are proved.