不对称条件下的储能虚拟同步发电机低电压穿越控制技术

HE Anran

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不对称条件下的储能虚拟同步发电机低电压穿越控制技术

更新时间：2025-08-13

- 不对称条件下的储能虚拟同步发电机低电压穿越控制技术
- Automation of Electric Power Systems Vol. 42, Issue 10, Pages: 122-127(2018)
- 作者机构：
  
  南瑞集团(国网电力科学研究院)有限公司,江苏省,南京市,211106
- 作者简介：
- 基金信息：
- DOI：
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- Published：2018
- 稿件说明：
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HE Anran. [J]. Automation of electric power systems, 2018, 42(10): 122-127.
DOI：

HE Anran. [J]. Automation of electric power systems, 2018, 42(10): 122-127. DOI：

摘要

虚拟同步发电机技术能够使逆变器模拟同步发电机的运行机制并网运行，有利于改善系统稳定性。而为了真实模拟同步发电机的工作特性，要求虚拟同步发电机装置必须具备低电压故障穿越能力。当发生不对称故障时，由于电压、电流中存在大量负序分量，严重影响输出电压和电流质量。为解决上述问题，首先，从控制系统数学模型出发，分析三相电压源型逆变器常规d-q旋转坐标系下的电压前馈本质，提出基于α-β坐标系下的电压前馈策略。然后，采用电压相位补偿技术实现负序电流抑制。最后，通过5 MW储能虚拟同步发电机实时数字仿真仪模型，模拟单相和相间接地故障，验证了控制算法的正确性和有效性。

Abstract

The technology of virtual synchronous generator(VSG)enables the inverter to simulate the operation mechanism of synchronous generators connected to the grid

which is beneficial to improve the stability of the power system. In order to truly simulate the working characteristics of synchronous generators

it is required that the VSG must have low voltage fault crossing capability. When an asymmetrical fault occurs

there are a large number of negative sequence components in the voltage and current

which seriously affect the quality of output voltage and current. In order to solve the problem mentioned above

firstly

based on the mathematical model of the control system

the voltage feedforward nature of the three-phase voltage source inverter is analyzed in the conventional d-q rotating coordinate system

and the voltage feedforward strategy based on the α-β coordinate system is proposed. Then

the voltage phase compensation technique is adopted to suppress the negative sequence current. Finally

through real time digital simulator model of the 5 MW energy storage VSG

single-phase and phase-to-ground fault is simulated

which verifies the correctness and effectiveness of the control algorithm.

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虚拟同步储能变换器的功率环双模式控制

计及无功电压环节的VSG虚拟转矩及振荡失稳机理分析

电网电压前馈对柔性直流输电在弱电网下的稳定性影响

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