| 模块化多电平中压变流器阻抗分析及次/超同步振荡抑制 |
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| 引用本文： | 高尚,王建华,李周,李玲玉,何国庆,李光辉. 模块化多电平中压变流器阻抗分析及次/超同步振荡抑制[J]. 电力系统自动化, 2019, 43(6): 116-121 |
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| 作者姓名： | 高尚 王建华 李周 李玲玉 何国庆 李光辉 |
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| 作者单位： | 江苏省智能电网技术与装备重点实验室(东南大学),江苏省南京市 210096;东南大学电气工程学院,江苏省南京市 210096;国网江苏省电力有限公司盐城供电分公司,江苏省盐城市,224005;中国电力科学研究院有限公司,北京市,100085 |
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| 基金项目： | 国家重点研发计划资助项目(2018YFB0904700)；江苏省自然科学基金资助项目(BK20181283)；国家电网公司科技项目“大型光伏电站直流升压汇集接入关键技术及设备研制” |
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| 摘 要： | 模块化多电平换流器适合作为中高压电网的并网接口,针对光伏中压直流汇集系统潜在次/超同步振荡问题,从频域出发,系统地建立了送端电流源型并网模块化多电平变流器的正负序阻抗模型,对并网时互联系统的稳定性作出分析。频域正负序阻抗与电网阻抗交叠预测了串联补偿下光伏中压直流汇集系统次/超同步振荡现象,并验证了频域阻抗与时域波形分析的一致性。通过控制参数优化,有效抑制了模块化多电平换流器串联补偿时次/超同步振荡现象。
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| 关 键 词： | 模块化多电平换流器 电磁暂态仿真 正负序阻抗 频域 次/超同步振荡 |
| 收稿时间： | 2018-05-15 |
| 修稿时间： | 2019-01-28 |
Impedance Analysis and Sub-synchronous and Super-synchronous Oscillation Suppression of Modular Multilevel Medium Voltage Converter |
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| GAO Shang,WANG Jianhu,LI Zhou,LI Lingyu,HE Guoqing and LI Guanghui. Impedance Analysis and Sub-synchronous and Super-synchronous Oscillation Suppression of Modular Multilevel Medium Voltage Converter[J]. Automation of Electric Power Systems, 2019, 43(6): 116-121 |
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| Authors: | GAO Shang WANG Jianhu LI Zhou LI Lingyu HE Guoqing LI Guanghui |
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| Affiliation: | Jiangsu Provincial Key Laboratory of Smart Grid Technology & Equipment (Southeast University), Nanjing 210096, China; School of Electrical Engineering, Southeast University, Nanjing 210096, China,Jiangsu Provincial Key Laboratory of Smart Grid Technology & Equipment (Southeast University), Nanjing 210096, China; School of Electrical Engineering, Southeast University, Nanjing 210096, China,Jiangsu Provincial Key Laboratory of Smart Grid Technology & Equipment (Southeast University), Nanjing 210096, China; School of Electrical Engineering, Southeast University, Nanjing 210096, China,Yancheng Power Supply Company of State Grid Jiangsu Electric Power Co. Ltd., Yancheng 224005, China,China Electric Power Research Institute, Beijing 100085, China and China Electric Power Research Institute, Beijing 100085, China |
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| Abstract: | Modular multilevel converter(MMC)is suitable for grid-connected interface for medium and high voltage power grids. For the potential sub-synchronous and super-synchronous oscillation problem in photovoltaic(PV)medium voltage direct current(DC)power collection system, the positive and negative sequence impedance models of MMC converter are systematically established and the basis of the stability analysis for grid-connected MMC inverters is provided from the frequency domain. Positive and negative sequence impedance overlaps with the grid impedance, which predicts the sub-synchronous and super-synchronous oscillation of the PV medium-voltage DC power collection system under series compensation and verifies the consistency of frequency domain impedance and time domain waveform analysis. By controlling the parameter optimization, the sub-synchronous and super-synchronous oscillation phenomenon of the MMC under series compensation is effectively suppressed. |
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| Keywords: | modular multilevel converter electromagnetic transient simulation positive and negative impedance frequency domain sub-synchronous and super-synchronous oscillation |
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