基于双向迭代的交直流互联电力系统潮流计算  

A Power Flow Calculation Algorithm for AC/DC Interconnected Power Systems Based on Bi-directional Iteration

作　　者：薛振宇[1] 房大中[2] 

机构地区：[1]国网北京经济技术研究院,北京市100052 [2]电力系统仿真控制教育部重点实验室,天津大学,天津市300072

出　　处：《电力系统自动化》2013年第5期61-67,共7页Automation of Electric Power Systems

摘　　要：提出一种基于双向迭代技术的交直流互联电力系统潮流计算的新算法。算法针对交流系统和直流系统的完整电路模型,以换流器交流母线电流作为协调变量,分别建立含该协调变量的改进交流系统和直流系统潮流方程。并通过线性变换,先后推导出一组直流系统和交流系统的标准形修正方程,从而实现前推计算交流系统变量修正量,回代计算直流系统变量修正量的双向迭代计算。算法在数学上保持了统一迭代法的收敛特性,在结构上继承了交替迭代法控制方式切换简易的特点。在一个典型的交直流测试系统上论证了该算法的有效性,同时在一套南方电网完整结构的大规模系统上论证了该算法的实用性。A novel bi-directional iteration based algorithm is proposed for power flow analysis of AC/DC interconnected power system. The complete electrical circuit models of AC and DC transmission system are used. Specifically, the vector of AC current over convector transformer is defined as coordinate variable with which both of the AC system and DC system modified power flow equations are established separately. Then, the normative correction equations of AC system and DC system are deduced via linear transformation respectively. Subsequently, the bi-directional iteration algorithm is achieved by forward calculating the AC system variable increment and backward calculating the DC system variable increment. This algorithm effectively preserves the convergence of unified iterative method mathematically; it also achieves the flexibility of DC system control mode variation as alternate iterative method. Finally, studies on a typical AC/DC test system and a large-scale AC/DC interconnected power system in South China network indicate the validity and practicability of this algorithm.

关 键 词：交直流电力系统 潮流计算 双向迭代 

分 类 号：TM744[电气工程—电力系统及自动化]