基于虚拟功率的虚拟同步发电机预同步方法

WEI Yalong

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基于虚拟功率的虚拟同步发电机预同步方法

更新时间：2025-08-13

- 基于虚拟功率的虚拟同步发电机预同步方法
- Automation of Electric Power Systems Vol. 40, Issue 12, Pages: 124-129(2016)
- 作者机构：
  
  西安理工大学自动化与信息工程学院,陕西省,西安市,710048
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- Published：2016
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WEI Yalong. [J]. Automation of electric power systems, 2016, 40(12): 124-129.
DOI：

WEI Yalong. [J]. Automation of electric power systems, 2016, 40(12): 124-129. DOI：

摘要

模拟同步发电机特性的分布式发电系统对大电网呈友好特性，然而，虚拟同步发电机(VSG)在并网瞬间可能存在较大冲击电流。为此，文中提出一种基于虚拟功率和电压频率二次控制的预同步单元，实现VSG离网和并网间的无缝切换。在此基础上，详细分析了惯性、阻尼和调差系数对功频调节特性的影响。仿真和实验结果表明:所提出的预同步控制能实现VSG不同模式之间的平滑切换，且与传统预同步控制相比，控制简单；同时，所研究控制策略具有较好的有功功率、无功功率跟踪性能。

Abstract

The distributed power generation system simulating the characteristics of synchronous generators is grid-friendly to the large power grid. However

a large dash current may be generated at the instant the virtual synchronous generator(VSG)is connected to the grid. This paper proposes a pre-synchronization unit based on the virtual power and the secondary frequency and voltage regulation to achieve seamless transform between the off-disconnection and grid-connection of VSG. Accordingly

the influence of inertia

damping and droop coefficients on the frequency regulation characteristics is analyzed in detail. Simulation and experimental results show that the proposed pre-synchronization control is able to achieve seamless transform between different VSG modes

which is simpler than the conventional pre-synchronization control

while having a good active and reactive power tracking performance. This work is supported by National Natural Science Foundation of China(No. 51277150)

Industrial Research Project of Shaanxi Province(No. 2013K07-05)

and Industrial Cultivation Project of Shaanxi Provincial Department of Education(No. 14JF020).

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