交直流系统可利用传输能力的评估  

Evaluation of available transfer capability for AC/DC power systems

作　　者：唐国栋[1] 李华强[1] 肖玲[1] 程超 

机构地区：[1]四川大学电气信息学院,四川成都610065 [2]四川南充电业局,四川南充637000

出　　处：《电力系统保护与控制》2010年第2期12-17,39,共7页Power System Protection and Control

基　　金：国家教育部回国人员科研启动基金

摘　　要：提出了一种基于内点法的适用于交直流系统求解可利用传输能力的新方法。由交直流网络间的耦合关系和换流器转换方程,推导出直角坐标系交直流系统的Jacobi、Hessian矩阵,进而用原始-对偶内点法求解计及电压幅值和热稳定约束的交直流系统ATC。针对静态电压稳定约束下交直流系统直流控制方式会发生调整的情况,提出分段求解交直流系统ATC的方法,该方法能方便考虑直流变量约束及运行方式的调整。经算例验证该算法在交直流系统ATC计算中对初始值选择要求不高,收敛迅速。A new method, based on interior point algorithm, for solving available transfer capability for AC/DC power system is proposed in this paper. Firstly, the Jacobian and Hessian matrix of AC/DC system in the rectangular coordinates is extrapolated with the coupled relationship of AC/DC network and the conversion function of converters. Then, the ATC of AC/DC system with respect to thermal and voltage magnitude limits can be calculated by interior point method. Secondly, considering the switch of the DC control mode with respect to voltage stability limits, a segment method for solving ATC of AC/DC power system is proposed. The method is characterized by its convenience of considering variable constraints of DC system and adjustment of DC operation mode. Simulation results show that the method is not sense to the initial value and convergent swiftly.

关 键 词：可利用传输能力 交直流系统 N-1准则 内点法 分段求解法 

分 类 号：TM721.3[电气工程—电力系统及自动化]