基于EMTDC的静态同步串联补偿器稳态及暂态特性分析  

Analysis on Steady State and Transient Characteristics of Static Synchronous Series Compensator Based on EMTDC

作　　者：赵建军[1] 郭剑波[1] 周孝信[1] 

机构地区：[1]中国电力科学研究院,北京市海淀区100085

出　　处：《电网技术》2006年第14期13-18,29,共7页Power System Technology

基　　金：国家自然科学基金资助项目(50477055)。~~

摘　　要：通过对静态同步串联补偿器(static synchronous series compensator,SSSC)机理的分析,提出了应用正弦脉宽调制(sinusoidal pulse width modulation,SPWM)技术的SSSC控制器实现方案。控制回路设计中通过对正弦参考波相角偏移量的控制使直流电容电压保持恒定。SSSC稳态时的主要作用是对被补偿线路有功功率进行调控,控制器设计中综合考虑了调制系数与补偿方式(容性或感性)之间的相关性,实现了对线路有功功率的灵活控制,响应速度和波动都满足要求。利用PSCAD／EMTDC电磁暂态仿真工具搭建了包括EPRI-7节点系统、SSSC电压源逆变器及其触发控制回路,以及相应的测量、分析模块的详细电磁暂态仿真模型。仿真实现了SSSC的稳态及暂态功能,计算结果证明了控制回路的有效性和系统模型的正确性。同时对直流电容取值及耦合变压器电抗和变比对SSSC特性的影响进行了初步分析。By means of analyzing the mechanism of static synchronous series compensator （SSSC）, a scheme to implement SSSC controller by use of sinusoidal pulse width modulation （SPWM） is proposed. In the design of its controller, through adjusting the angle offset of sinusoidal reference wave, the voltage of DC capacitor remains constant. The primary function of SSSC in steady state is to regulate the active power of transmission line being compensated; considering the correlativity between modulation factor and compensation mode （capacitive or inductive mode） in the design of the controller, the flexible adjustment of active power in transmission line is implemented, both response speed and fluctuation are satisfied. A detailed electromagnetic transient simulation model, in which EPRI 7-bus system, SSSC voltage source inverter and its firing control circuit, and corresponding measuring and analysis modules are included, is constructed by utilizing PSCAD/ EMTDC electromagnetic transient simulation tool. The steady state and transient function of SSSC are implemented in simulation; simulation results also prove the effectiveness of control circuit and correctness of system model. The influence of the value of DC capacitor and reactance and turn ratio of coupling transformer on the characteristics of SSSC is preliminarily analyzed.

关 键 词：静态同步串联补偿器(SSSC) 稳态 暂态分析 脉宽调制 电力系统 

分 类 号：TM714[电气工程—电力系统及自动化]