下垂控制逆变器的虚拟功角稳定机理分析

HUANG Linbin

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下垂控制逆变器的虚拟功角稳定机理分析

更新时间：2025-08-13

- 下垂控制逆变器的虚拟功角稳定机理分析
- Automation of Electric Power Systems Vol. 40, Issue 12, Pages: 117-123(2016)
- 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：2016
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HUANG Linbin. [J]. Automation of electric power systems, 2016, 40(12): 117-123.
DOI：

HUANG Linbin. [J]. Automation of electric power systems, 2016, 40(12): 117-123. DOI：

摘要

在大干扰下，电压源型的下垂控制逆变器会出现与传统同步发电机类似的暂态功角失稳，而且逆变器会因电流饱和而退变成一个电流源，进而出现更复杂的同步稳定问题。文中以逆变器单机无穷大系统为例，通过定义逆变器的虚拟功角，分别得出逆变器电流未饱和时的虚拟功角特性和电流饱和下的虚拟功角特性，在此基础上分析了逆变器的虚拟功角同步稳定机理和失稳过程，以及故障切除时间对逆变器虚拟功角暂态稳定性的影响，并将该分析方法扩展到虚拟同步机的暂态稳定分析中。最后，基于MATLAB/Simulink仿真验证了失稳分析方法的合理性。

Abstract

Under a large disturbance

similar to synchronous generators(SGs)

the transient instability may occur on the voltage-source-type droop-controlled inverters. Moreover

the inverter will turn into a current source since its current saturates

resulting in a more complicated synchronous stability problem. This paper studies on the single-inverter infinite-bus system. The virtual power angle is defined to obtain the virtual power angle characteristics with and without current saturation

which is used to analyze the synchronous stability mechanism of the inverter as well as the instability process. The influences of the fault-clearing time on the virtual power angle stability are also analyzed. And this method is extended to the transient stability analysis of the virtual synchronous machine. Finally

the rationality of the instability analysis method is verified via simulations under MATLAB/Simulink. This work is supported by National Natural Science Foundation of China(No. 51577168)and National High Technology Research and Development Program of China(863 Program)(No. 2015AA050202).

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