| 引用本文: | 陆秋瑜,杨银国,郑建平,李力,郭瀚临,张哲任,徐政.功率同步控制的模块化多电平换流器阻抗建模及谐振稳定性分析[J].电力自动化设备,2022,42(8): |
| LU Qiuyu,YANG Yinguo,ZHENG Jianping,LI Li,GUO Hanlin,ZHANG Zheren,XU Zheng.Impedance modeling and resonance stability analysis of modular multilevel converter with power synchronization control[J].Electric Power Automation Equipment,2022,42(8): |
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| 摘要: |
| 为了研究模块化多电平换流器(MMC)采用功率同步控制时的阻抗特性和其接入后系统的宽频谐振稳定性，通过谐波状态空间方法，考虑MMC的内部动态特性和完整的控制回路，建立了MMC采用功率同步控制时的等效阻抗模型。分析了功率同步控制中新引入的功率同步环、无功-电压控制及其他主要控制环节对阻抗特性的影响。研究表明采用功率同步控制的MMC在次同步频段和高频段均可能出现负阻尼效应，因而存在引发谐振不稳定的风险。基于PSCAD/EMTDC进行了阻抗扫描和电磁暂态仿真，其仿真结果分别验证了所建立模型和稳定性分析结果的准确性。 |
| 关键词: 功率同步控制 模块化多电平换流器 谐波状态空间 阻抗建模 谐振稳定性 |
| DOI：10.16081/j.epae.202206027 |
| 分类号:TM712 |
| 基金项目:中国南方电网有限责任公司科技项目 (036000KK52210042(GDKJXM20212057)) |
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| Impedance modeling and resonance stability analysis of modular multilevel converter with power synchronization control |
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LU Qiuyu1, YANG Yinguo1, ZHENG Jianping1, LI Li1, GUO Hanlin2, ZHANG Zheren2, XU Zheng2
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1.Power Dispatching Control Center of Guangdong Power Grid Corporation, Guangzhou 510600, China;2.College of Electrical Engineering, Zhejiang University, Hangzhou 310027, China
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| Abstract: |
| To investigate the impedance characteristics of PSC-MMC(Power Synchronization Control based on Modular Multilevel Converter) and the broadband resonance stability of the system with grid-connected PSC-MMC, utilizing harmonic state space method, considering the internal dynamic characteristics and complete control loops of MMC, an equivalent impedance model of PSC-MMC is built. The effects of newly employed power synchronization loop, reactive-voltage control and other major control loops on impedance characteristics in the power synchronization control are analyzed. The study has identified that PSC-MMC might have negative damping effect in subsynchronous frequency band and high frequency band, so there is a risk of causing resonance instability. Impedance scanning and electromagnetic transient simulation are carried out based on PSCAD/EMTDC, the simulative results respectively verify the accuracy of the model and stability analysis results. |
| Key words: power synchronization control modular multilevel converter harmonic state space impedance modeling resonance stability |
