一种新的UPFC潮流计算模型

A new UPFC model for power flow analysis

以往的统一潮流控制器UPFC(UnifiedPowerFlowController)的潮流计算模型要用到牛顿-拉夫逊法进行迭代求解,需要重新编制与之相应的潮流计算程序,因此费时费力。现提出一种新的UPFC等值模型,该模型适合利用已有的商业软件计算潮流,无需因为UPFC加入系统而重新编制潮流程序,因而可以大大减少工作量。该模型的主要设计思想是将系统中的UPFC用注入功率和恒定电压等值表示,从而将UPFC从等值网络中移去。该模型分为两部分,第一部分适用于UPFC的控制方式1和方式2,第二部分适用于控制方式3和方式4。一个IEEE-9节点的算例验证了该模型的有效性。

The newton-raphson iteration was used in former UPFC(Unified Power Flow Con-troller) models for power flow analysis and the relevant power flow calculation program was needed,which was time costing. A new UPFC model suitable for power flow analysis using the commercial software is presented. Its main idea is to replace the UPFC by a net power input and a constant voltage. The model can be divided into two parts:part one for UPFC control scheme l and scheme 2,part two for UPFC control scheme 3 and scheme 4. An IEEE-9 bus system is employed to demonstrate its validity.