含VSC-MTDC的交直流混合系统的改进潮流算法  

Modified power flow algorithm for hybrid AC-DC systems equipped with VSC-MTDC

作　　者：叶芳[1] 卫志农[1] 孙国强[1] 

机构地区：[1]河海大学能源与电气学院,江苏南京210098

出　　处：《河海大学学报（自然科学版）》2011年第3期338-343,共6页Journal of Hohai University(Natural Sciences)

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

摘　　要：在基于电压源换流器的多端直流(VSC-MTDC)输电的稳态模型的基础上,导出了含VSC-MTDC的交直流混合系统潮流计算的数学模型,并针对统一迭代求解法和交替迭代求解法这2种算法存在的不足,提出了改进交替迭代求解法.该算法从数学表达形式上严格解除了交流变量和直流变量之间的耦合关系,同时还可以高效利用已有的纯交流系统潮流求解程序,保证了算法的精度和收敛性.IEEE-14,IEEE-30,IEEE-57节点标准算例的仿真结果表明该算法是有效的.Based on the steady model of voltage source converter based multi-terminal direct current（VSC-MTDC） transmission,a mathematical model for hybrid AC-DC power flow systems equipped with VSC-MTDC was derived.With regard to the shortcomings of two kinds of algorithms： the uniform iterative method and the alternative iterative method,a modified alternative iterative power flow algorithm was proposed.The proposed algorithm strictly canceled the coupling relation between AC and DC variables in the mathematical form,and it could be efficiently solved by means of the existing AC power flow programs so as to ensure the accuracy and convergence of the algorithm.The simulated results of test systems of IEEE-14,IEEE-30 and IEEE-57 show that the proposed mathematical model is effective.

关 键 词：直流输电 电压源换流器 多端直流 潮流算法 

分 类 号：TM721.3[电气工程—电力系统及自动化]