含虚拟惯量的电力系统频率响应特性定量分析方法

HUANG Linbin

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含虚拟惯量的电力系统频率响应特性定量分析方法

更新时间：2025-08-13

- 含虚拟惯量的电力系统频率响应特性定量分析方法
- Automation of Electric Power Systems Vol. 42, Issue 8, Pages: 31-38(2018)
- 作者机构：
  
  浙江大学电气工程学院,浙江省,杭州市,310027
- 作者简介：
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- DOI：
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- Published：2018
- 稿件说明：
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HUANG Linbin. [J]. Automation of electric power systems, 2018, 42(8): 31-38.
DOI：

HUANG Linbin. [J]. Automation of electric power systems, 2018, 42(8): 31-38. DOI：

摘要

虚拟同步机可以使并网逆变器具有类似于同步发电机的外特性，从而使逆变器参与频率调节并为电力系统增加虚拟惯量。但目前，对于含虚拟惯量的电力系统的频率响应特性缺少定量的刻画指标，难以从理论上指导大规模电力电子设备接入时虚拟惯量的优化配置，也无法从理论上刻画虚拟惯量的加入对于电力系统频率响应特性的影响。针对这一问题，提出以系统相位扰动到频率输出的闭环传递函数(或传递函数矩阵)的H2与H∞范数作为描述系统频率响应特性的指标，从而定量刻画虚拟惯量的加入对系统频率的扰动抑制能力的影响。在此基础上，分析了同步发电机和虚拟同步机的频率响应特性，并进一步结合频率响应的时域波形验证该指标的有效性。

Abstract

Grid-connected power inverters can be operated as virtual synchronous machines to mimic the characteristics of synchronous generators. In this manner

the inverter can participate in the frequency regulation and add virtual inertia to power systems. However

there is no index to describe the frequency response characteristics of power systems with virtual inertia provided so far

which results in the difficulty in optimizing the allocation of virtual inertia among virtual synchronous machines as well as evaluating the influence of virtual inertia on the frequency response characteristics of power systems. To deal with this problem

the H2 and H∞norms of the closed-loop transfer function(from angle perturbation input to frequency output)are utilized to describe the frequency response characteristics of the system. On this basis

the frequency response characteristics of conventional synchronous generator and virtual synchronous machine are analyzed. Furthermore

time-domain waveforms of frequency response verify the effectiveness of the method.

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