含VSC-HVDC的交直流混合系统的状态估计解耦迭代算法  

Decoupled Iteration Algorithm for State Estimation of Hybrid AC/DCPower System Equipped with VSC-HVDC

作　　者：孙国强[1] 卫志农[1] 叶芳[1] 

机构地区：[1]河海大学能源与电气学院,江苏南京210098

出　　处：《电网与清洁能源》2011年第3期8-14,共7页Power System and Clean Energy

基　　金：国家自然科学基金资助项目(50877024);河海大学自然科学基金资助项目(2009421411);中央高校基本科研业务费(2010B05914)

摘　　要：针对以电压源换流器(Voltage Source Converter,VSC)为基础的新一代高压直流输电,推导了直流系统的数学模型,以状态估计为着眼点,建立了交直流混合系统的状态估计模型,并在此基础上提出了一种解耦迭代算法。该算法根据雅克比矩阵的特点,运用数学方法对交流子系统和直流子系统进行严格解耦,从而将交直流混合系统分为交流子系统和直流子系统2部分,实现了交、直流子系统的分开迭代求解。计算过程中未做任何假设,因此完整计及了交、直流子系统间的耦合性,算法精度高,同时该算法在编制程序时可以充分利用纯交流系统的状态估计程序,因此具有良好的继承性。IEEE 14、IEEE 30、IEEE 57节点测试系统的仿真结果表明了所提算法的有效性。In this paper, the mathematical model of DC （Direct Current） system is deduced for the new generation of HVDC transmission, which is mainly based on Voltage Source Converter （VSC）. With a focus on state estimation, the state estimation model for hybrid AC/DC power system is built, on the basis of which, the decoupled iteration algorithm is proposed. The hybrid AC/DC power system is divided into the AC subsystem and DC subsystem, which can be solved separately with mathematical method according to the characteristics of Jacobian matrix. As the analysis and calculation are conducted without any assumptions made, and the connections between the AC subsystem and DC subsystem are taken into account, the algorithm is high in precision. Moreover, as the state estimation program of the pure AC system can be fully used, the algorithm reaches high consistency. The results of IEEE 14-bus, IEEE 30-bus, IEEE 57-bus testing system simulations show that the proposed algorithm in the paper is effective.

关 键 词：直流输电 电压源换流器 VSC—HVDC 静态状态估计 

分 类 号：TM721.3[电气工程—电力系统及自动化]