基于节点功率注入的双芯对称型晶闸管可控移相器机电暂态建模  

Electromechanical Transient Modeling of Two-Core Symmetrical Thyristor Controlled Phase Shifting Transformer Based on Nodal Power Injection

作　　者：谢子豪 杜兆斌[1] 孙展域 甄鸿越 李作红 李峰 XIE Zihao;DU Zhaobin;SUN Zhanyu;ZHEN Hongyue;LI Zuohong;LI Feng(School of Electric Power Engineering,South China University of Technology,Guangzhou 510641,China;State Key Laboratory of HVDC,Electric Power Research Institute,CSG,Guangzhou 510663,China;Grid Planning Research Center of Guangdong Power Grid Co.,Ltd.,Guangzhou 510080,China)

机构地区：[1]华南理工大学电力学院,广州510641 [2]直流输电技术国家重点实验室(南方电网科学研究院),广州510663 [3]广东电网有限责任公司电网规划研究中心,广州510080

出　　处：《南方电网技术》2023年第5期71-79,共9页Southern Power System Technology

基　　金：中国南方电网有限责任公司科技项目(037700KK52190015,GDKJXM20198313);广东省重点领域研发计划项目(2019B111109001)。

摘　　要：晶闸管可控移相器(thyristor controlled phase shifting transformer,TCPST)具有快速响应特性,可用于提高系统稳定性。为实现含柔性交流输电系统(flexible AC transmission system,FACTS)设备的大规模电力系统暂态稳定计算,提出了TCPST的机电暂态仿真模型。考虑TCPST的电气部分和控制结构,通过模型等效和等价变换,推导了TCPST节点功率注入模型的数学表达式,并建立计及附加阻尼控制器的档位控制模型。此外,针对TCPST仿真模型中档位离散切换特性所带来的数值振荡问题,提出了利用滤波环节处理注入功率的抑制方案。最后在交直流电力系统计算分析软件中搭建了TCPST的机电暂态模型,并将模型应用到南方电网的算例中。通过算例系统的DSP、BPA和PSCAD仿真计算结果比较,验证了所搭建模型的准确性,且该机电暂态建模方法可为其他FACTS设备的仿真建模提供参考。Thyristor controlled phase shifting transformer(TCPST)has fast response characteristic,and can improve system stability.In order to realize the transient stability calculation of large-scale power system with flexible AC transmission system(FACTS)equip⁃ment,an electromechanical transient simulation model of TCPST is proposed in this paper.Considering the electrical part and control structure of TCPST,the mathematical expression of TCPST node power injection model is deduced through model equivalence and equivalence transformation.And the gear control model is implemented with supplementary damping controller.Furthermore,in view of the numerical oscillation problem caused by the discrete switching characteristics of gear in the TCPST simulation model,a suppression scheme using the filter to process the injected power is proposed.Finally,the electromechanical transient model is built by using the AC/DC power system calculation and analysis software,and the model is applied to the case of China Southern Power Grid.Through the comparison of the simulation results of the example system by DSP,BPA and PSCAD respectively,the correct⁃ness of the proposed transient model is validated,and the electromechanical transient modeling method provides reference for the simulation and modeling of other FACTS equipment.

关 键 词：晶闸管可控移相器 机电暂态模型 功率注入 电力系统稳定 

分 类 号：TM711[电气工程—电力系统及自动化]