四川大学 电气工程学院,四川,成都,610065
纸质出版:2025
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王 杨,廖 鹏,杨孟凌,肖先勇,王海风.多类型无功控制下VSG的有功响应特性分析与功率耦合强度量化[J].智慧电力,2025,53(10):61-69.
WANG Yang, LIAO Peng, YANG Mengling, et al. Analysis of Active Power Response Characteristics and Quantification of Power Coupling Strength in VSG under Multiple Types of Reactive Power Control[J]. 2025, 53(10): 61-69.
王 杨,廖 鹏,杨孟凌,肖先勇,王海风.多类型无功控制下VSG的有功响应特性分析与功率耦合强度量化[J].智慧电力,2025,53(10):61-69. DOI: 10.20204/j.sp.2025.10009.
WANG Yang, LIAO Peng, YANG Mengling, et al. Analysis of Active Power Response Characteristics and Quantification of Power Coupling Strength in VSG under Multiple Types of Reactive Power Control[J]. 2025, 53(10): 61-69. DOI: 10.20204/j.sp.2025.10009.
为应对跟网型新能源机组接入导致的电网支撑能力下降问题,虚拟同步发电机(VSG)技术受到广泛关注,并已在新型电力系统中得到应用。然而,与传统同步发电机不同,VSG在中低压电网运行时,高阻感比线路极易引发复杂的功率耦合现象。基于此,综合伯德图分析与相对增益理论,提出一种新型的VSG功率耦合分析框架。与现有定性分析方法不同,该方法利用伯德图的动态与稳态分析能力以及相对增益理论对耦合强度的量化能力,系统评估了比例无功控制、惯量无功控制及比例积分无功控制对VSG功率耦合强度及其有功响应特性的影响,明确了关键控制参数对耦合的作用机制,并为无功控制环的选取提供了建议。
In response to the decline in grid support capability caused by the integration of grid-following renewable energy units, virtual synchronous generator (VSG) technology has garnered significant attention and has been widely applied in new power systems. However, unlike conventional synchronous generators, when a VSG operates in medium- and low-voltage grids, the lines with high resistance-inductance ratios can easily lead to complex power coupling phenomena. Therefore, this paper proposes a novel analysis framework for VSG power coupling by integrating Bode diagram analysis and relative gain theory. Differing from existing qualitative analysis methods, this approach utilizes the dynamic and steady-state analysis capabilities of Bode diagrams and the coupling strength quantification ability of relative gain theory to systematically evaluate the impact of proportional reactive power control, inertia-based reactive power control, and proportional-integral reactive power control on the VSG’s power coupling strength and its active power response characteristics. It identifies the key control parameters influencing coupling and provides recommendations for the selection of reactive power control loops.
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