摘要
分析了换流器控制方式的转换策略。考虑在不同控制方式下交直流系统的相互影响,提出一种能够满足换流器控制方式转换策略的潮流计算方法。以顺序求解法为基础,对交流系统雅可比矩阵的特殊节点元素进行有效修正;基于换流器控制方式转换策略合理选取换流器关键状态变量,并将控制角余弦值和变压器分接头变比乘积作为一个状态变量处理,有效地避免了迭代过程中控制角余弦值或变压器分接头越限情况发生。该算法数学概念清晰、易于实现。仿真结果验证了该算法的准确性、快速性和可靠性。
The transformation strategy among converter control modes is analyzed. Considering the interaction effects between AC and DC system under different converter control modes, a new power flow algorithm that can suitable for the transformation strategy of converter control modes is proposed. Based on the sequential solution, the elements of special nodes in Jacobian matrix of AC system are effectively modified; in the transformation strategy based on converter control modes the key state variables of converter are reasonably chosen and the product of the cosine value of the control angle with the transformation ratio of transformer tap is processes as one state variable to effectively avoid the off-limit of cosine value of the control angle or that of transformer tap during the iteration. The proposed algorithm is mathematically clear and easy to achieve. Simulation results show that the proposed algorithm is accurate, rapid and reliable.
出处
《电网技术》
EI
CSCD
北大核心
2011年第8期93-98,共6页
Power System Technology
基金
国家自然科学基金项目(50977009)~~
关键词
交直流系统
换流器
潮流计算
顺序求解法
AC/DC power system
converter
power flow calculation
sequential solution
