无平衡节点孤岛运行微电网的连续潮流计算  

Continuous Power Flow for Islanding Microgrid Without Balance Nodes

作　　者：彭寒梅[1] 曹一家[1] 黄小庆[1] 黄超[1] 

机构地区：[1]湖南大学电气与信息工程学院,湖南省长沙市410082

出　　处：《中国电机工程学报》2016年第8期2057-2067,共11页Proceedings of the CSEE

基　　金：国家863高技术基金项目(2012AA050217);国家自然科学基金项目(51507149)~~

摘　　要：连续潮流(continuous power flow,CPF)是电力系统电压稳定分析的有效工具,也是解决常规潮流中病态潮流问题的方法之一。针对无平衡节点孤岛运行微电网系统的无平衡节点、且有下垂控制分布式电源装置的特性,提出一种无平衡节点孤岛运行微电网CPF计算方法。采用不要求雅可比矩阵非奇异,且具有全局收敛性的LM-TR方法求解初始点。预测环节采用结合局部参数化方法的切线法。校正环节提出新型的超球面参数化方法,并采用结合传统牛顿法和带Armijo型线性搜索牛顿法的组合牛顿法进行校正,以保证CPF校正计算成功,及实现整个CPF过程中在较高计算精度下一直采用较大定步长预测。对改造后的37节点和17节点无平衡节点孤岛运行微电网系统采用所提方法进行CPF计算,验证了其正确性和有效性。Continuous power flow（CPF） is an effective tool for power system voltage stability analysis, and it is one of algorithms for solving the ill-conditioned power flow problem of conventional power flow calculation in the power system. Aiming at the characteristics that the islanding microgrid without balance nodes has droop control distributed generator（DG） devices and has not a balance node, a CPF calculation method was proposed. Levenberg Marquardt method combined with trust region technique（LM-TR） that has a global convergence and does not require Jacobian matrix non-singular was proposed for solving the initial power flow. In the prediction step, the tangent prediction method combining local parameterization technique was used. In the correction step, a new hyper-spheres parameterization method was proposed, and a combination Newton method that combines the traditional Newton algorithm and Newton algorithm with Armijo-type line search was used for correction, in order to ensure the success of CPF calculation, and to achieve a greater fixed-step prediction at a higher calculation precision during the whole CPF. The proposed CPF calculation method was performed on 37-node and 17-node islanding microgrid without balance nodes, and the results testify the correctness and validity.

关 键 词：连续潮流 无平衡节点孤岛运行微电网 LM-TR方法 超球面参数化方法 组合牛顿法 

分 类 号：TM7[电气工程—电力系统及自动化]