| 引用本文: | 杨健,蔡晖,宋鹏程,彭竹弈,祁万春,徐政.采用直接电流控制策略的MMC-UPFC小信号模型[J].电力自动化设备,2019,39(10): |
| YANG Jian,CAI Hui,SONG Pengcheng,PENG Zhuyi,QI Wanchun,XU Zheng.Small-signal model of MMC-UPFC with direct current control strategy[J].Electric Power Automation Equipment,2019,39(10): |
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| 摘要: |
| 基于模块化多电平换流器(MMC)的统一潮流控制器(UPFC)大多采用直接电流控制策略，为分析采用该控制时UPFC接入后系统的小干扰稳定特性，针对一般的3节点拓扑UPFC，推导了其外环控制器、内环控制器、MMC和直流系统的小信号模型，并给出了UPFC输出电流的线性化方程。进一步地推导了传统2节点拓扑UPFC的小信号模型，同时给出了UPFC模型与系统其余部分的组合方法，建立了系统整体的线性化模型。最后，通过对一个2机测试系统进行时域仿真和模态分析，验证了所提小信号模型的正确性。 |
| 关键词: 统一潮流控制器 模块化多电平换流器 直接电流控制 小信号模型 机电暂态 |
| DOI：10.16081/j.epae.201909041 |
| 分类号:TM46 |
| 基金项目:国家电网公司科技项目(SGTYHT/15-JS-191) |
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| Small-signal model of MMC-UPFC with direct current control strategy |
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YANG Jian1, CAI Hui2, SONG Pengcheng3, PENG Zhuyi2, QI Wanchun2, XU Zheng1
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1.College of Electrical Engineering, Zhejiang University, Hangzhou 310027, China;2.Economic Research Institute of State Grid Jiangsu Electric Power Co.,Ltd.,Nanjing 210008, China;3.National Electric Power Dispatching and Control Center, State Grid Corporation of China, Beijing 100031, China
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| Abstract: |
| UPFC(Unified Power Flow Controller) based on MMC(Modular Multilevel Converter) usually employs direct current control strategy. To analyze the small-signal stability characteristics of the power system connected with direct current controlled MMC-UPFC, in view of the general three-node topology UPFC, the small-signal models of its outer-loop controller, inner-loop controller, MMC and DC system are derived. The linearized formulation of UPFC output current is also deduced. Subsequently, the small-signal model of the traditional two-node topology UPFC is built, meanwhile, the approach to combine the UPFC model with the rest of the system is illustrated and the linearized model of the entire system is established. Finally, the effectiveness of the proposed small-signal model is verified by time-domain simulation and modal analysis based on a two-generator test system. |
| Key words: UPFC MMC direct current control small-signal model electromechanical transient |
