| 引用本文: | 马俊鹏,李 磊,迟程缤,等.宽短路比工况下构网型逆变器功率自同步控制的稳定性分析[J].电力系统保护与控制,2025,53(7):165-173.[点击复制] |
| MA Junpeng,LI Lei,CHI Chengbin,et al.Stability analysis of power self-synchronization control of grid-forming converters in wide range of short-circuit ratio conditions[J].Power System Protection and Control,2025,53(7):165-173[点击复制] |
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| 摘要: |
| 基于功率同步控制(power synchronization control, PSC)的构网型(grid-forming, GFM)电压源型逆变器(voltage source converter, VSC)通过模拟同步机功角特性以实现电网支撑，但其在宽短路比(short-circuit ratio, SCR)运行工况下存在振荡风险。为分析构网型逆变器在宽短路比工况下的稳定情况，首先建立了PSC-VSC小信号模型，得到了有功、无功功率的传递函数，并以此揭示了GFM逆变器在宽短路比工况下小干扰失稳机理。结果表明，PSC-VSC在强电网下面临小信号失稳风险。进而提出基于功率自同步控制(power self-synchronization control, PSSC)的VSC控制策略，通过限制有功功率传递函数的增益，增强构网型逆变器强电网下的稳定性。然后分析了基于PSSC的GFM逆变器在电网故障下的稳定性。最后通过半实物实时仿真验证了所提分析方法的正确性和有效性。 |
| 关键词: 宽短路比 构网型逆变器 功率自同步 稳定性分析 半实物实时仿真 |
| DOI：10.19783/j.cnki.pspc.240664 |
| 投稿时间：2024-05-29修订日期：2024-08-26 |
| 基金项目:国家自然科学基金青年基金项目资助(52207216)；先进输电技术全国重点实验室开放基金项目资助 |
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| Stability analysis of power self-synchronization control of grid-forming converters in wide range of short-circuit ratio conditions |
| MA Junpeng1,LI Lei2,CHI Chengbin1,WANG Shunliang2,LIU Tianqi2 |
| (1. China Electric Power Research Institute, Beijing 100192, China, 2. School of Electrical Engineering,
Sichuan University, Chengdu 610065, China) |
| Abstract: |
| Grid forming (GFM) voltage source converters (VSC) based on the power synchronization control (PSC) are used to support the grid by emulating the power angle characteristics of synchronous machines. However, they face oscillation risks under wide range of short-circuit ratio (SCR) conditions. To analyze the stability of GFM converters under wide range SCR conditions, this paper establishes a small-signal PSC-VSC model, and the transfer functions of active and reactive power are derived. Based on this, the small-signal instability mechanism of GFM converters under wide range of SCR conditions is revealed. The results show that PSC-VSC faces small-signal instability risks in strong grid conditions. Subsequently, by limiting the gain of the active power transfer function, the power self-synchronization control (PSSC) based VSC control strategy is proposed to enhance the stability of GFM converters in strong grid conditions. Furthermore, the stability of PSSC-based GFM converters under grid faults is analyzed. Finally, the correctness and effectiveness of the proposed analysis method are verified through hardware-in-the-loop real-time simulation. |
| Key words: wide short-circuit ratio grid-forming converter power self-synchronization stability analysis hardware-in-the-loop real-time simulation |
