考虑元件功率电压特性的混合馈入直流输电系统静态电压稳定分析  

Steady-state Voltage Stability Analysis of Hybrid Infeed HVDC System Considering Power and Voltage Characteristics of System Components

作　　者：李东东 高晓城 孙梦显 林顺富 徐波 LI Dongdong;GAO Xiaocheng;SUN Mengxian;LIN Shunfu;XU Bo(School of Electrical Engineering,Shanghai University of Electric Power,Yangpu District,Shanghai 200090,China)

机构地区：[1]上海电力大学电气工程学院,上海市杨浦区200090

出　　处：《电网技术》2021年第12期4912-4921,共10页Power System Technology

基　　金：国家自然科学基金项目(51977128)。

摘　　要：由于现有的短路比指标并未计及系统元件动态功率电压特性,使得现有指标难以准确评估该系统临界电压稳定。为了解决上述问题,该文通过严格的理论推导,提出混合馈入短路比(hybrid infeed short circuit ratio,HISCR),来评估混合馈入直流输电系统静态电压稳定性。首先,以含同步调相机接入的混合馈入系统模型为基础,基于潮流雅克比矩阵推导出考虑元件动态功率电压特性的混合馈入功率电压灵敏因子(hybrid infeed power voltage sensitivity factor,HIPVSF)。其次,基于HIPVSF提出HISCR,并且给出HISCR的理论临界值,明确所提短路比指标与电压稳定性之间的物理关系。最后,基于PSCAD/EMTDC^(TM)与MATLAB仿真,通过与现有的短路比指标对比,验证所提指标的有效性。Without considering the power voltage characteristics of the system components,the existing short circuit ratios cannot measure the critical voltage stability point of the hybrid infeed HVDC system accurately.To deal with this challenge,a new index called the hybrid infeed short circuit ratio(HISCR)is proposed in this paper to analysis the critical voltage stability point of this system.First of all,a hybrid infeed power voltage sensitivity factor(HIPVSF)is derived from the Jacobian matrix as the basis of the following theoretical analysis,and takes into account the power voltage characteristics of the components.Then,the HISCR is proposed based on the HIPVSF considering the impacts of the dynamic power voltage characteristics of the HVDC links and the synchronous condenser.Finally,multiple simulations are conducted in this paper to verify the validity of the proposed index by using the PSCAD/EMTDC^(TM) and the MATLAB.

关 键 词：混合馈入直流系统 静态电压稳定 混合馈入功率电压灵敏因子 混合馈入短路比 

分 类 号：TM721[电气工程—电力系统及自动化]