考虑电网电压相角跳变的降压控制变流器瞬态稳定性评估--以设计为导向

Pingjuan Ge;Hailiang Xu;Ruitong Mao;Chunming Tu;Fan Xiao;Qi Guo
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引用次数: 0

摘要

降压控制电压源变换器(VSC)可为电网提供频率和电压支持。然而,在电网发生故障时,电压源转换器可能会出现瞬态不稳定性,这种不稳定性会受到控制参数和故障条件的显著影响。以往的研究尚未完全阐明这一机制。特别是,电网电压故障通常伴随着电网电压相位角跃变(VPAJ),而在评估 VSC 暂态稳定性时通常会忽略这一点。针对这一问题,本研究全面评估了 VPAJ 和关键控制参数对 VSC 瞬态特性的影响。此外,还定量计算了临界清除角和临界清除时间,以确定瞬态稳定性边界。此外,还提出了一种考虑瞬态稳定性约束的瞬态稳定性增强控制方法。最后,进行了模拟和实验测试,以验证理论分析和建议的方法。
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Design-Oriented Transient Stability Assessment for Droop-Controlled Converter Considering Grid Voltage Phase-Angle Jump
Droop-controlled voltage-source converters (VSCs) can provide frequency and voltage support to power grids. However, during a grid fault, VSCs may experience transient instability, which can be significantly affected by both the control parameters and fault conditions. This mechanism has not been fully elucidated in previous studies. In particular, grid-voltage faults are commonly accompanied by a grid voltage phase-angle jump (VPAJ), which is typically ignored in the evaluation of the transient stability of VSCs. To address this issue, this study comprehensively assesses the impact of the VPAJ and key control parameters on the transient characteristics of VSCs. Furthermore, the critical clearing angle and critical clearing time are quantitatively calculated to define the transient stability boundary. In addition, a transient stability-enhancement control method that considers the transient stability constraints is proposed. Finally, simulations and experimental tests are conducted to validate both the theoretical analysis and proposed method.
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来源期刊
Chinese Journal of Electrical Engineering
Chinese Journal of Electrical Engineering Energy-Energy Engineering and Power Technology
CiteScore
7.80
自引率
0.00%
发文量
621
审稿时长
12 weeks
期刊最新文献
Contents Front Cover Hybrid Modulation Strategy with Voltage Balancing Control for Four-Level Neutral-Point Clamped Converters Design-Oriented Transient Stability Assessment for Droop-Controlled Converter Considering Grid Voltage Phase-Angle Jump Dynamic Reconstruction of Total-Cross-Tied Photovoltaic Array Based on Arrays Using an Improved Dung Beetle Algorithm
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