基于变步长功率跟踪的有功备用式PV-VSG控制策略

ZHANG Haizheng

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基于变步长功率跟踪的有功备用式PV-VSG控制策略

更新时间：2025-08-13

- 基于变步长功率跟踪的有功备用式PV-VSG控制策略
- Automation of Electric Power Systems Vol. 43, Issue 5, Pages: 92-100(2019)
- 作者机构：
  
  合肥工业大学电气与自动化工程学院,安徽省,合肥市,230009
- 作者简介：
- 基金信息：
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- Published：2019
- 稿件说明：
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ZHANG Haizheng. [J]. Automation of electric power systems, 2019, 43(5): 92-100.
DOI：

ZHANG Haizheng. [J]. Automation of electric power systems, 2019, 43(5): 92-100. DOI：

摘要

传统光伏发电系统多以最大功率跟踪方式并网，不具备有功调频能力，而将其改造的光伏虚拟同步发电机多以配备储能的方式实现虚拟同步功能，但储能设备过于昂贵，主电路改造成本较大。针对上述问题，在不改造传统集中式光伏逆变器主电路的情况下，提出一种基于变步长功率跟踪的有功备用式光伏虚拟同步发电机策略，通过有功备用方式实现虚拟同步功能，节省改造成本，所提方法克服了固定步长跟踪方法快速性和稳定性不能兼容的问题，并且使光伏虚拟同步发电机快速精确地提供惯性及阻尼支撑控制。仿真结果验证了所提控制策略的有效性。

Abstract

Most of the traditional photovoltaic power generation systems are connected to power grid by the maximum power tracking mode and do not have the frequency modulation capability by adjusting active power. However

the photovoltaic virtual synchronous generator(PV-VSG)that is modified by them are mostly equipped with energy storage to realize the virtual synchronization function

but the energy storage equipment is too expensive

and the main circuit transformation cost is large. To solve the problems above

a PV-VSG control strategy is proposed based on power tracking of variable step in active power reserve mode saves transformation cost by realizing virtual synchronization function through active power reserve mode without transforming the main circuit of traditional centralized photovoltaic inverter. The proposed method overcomes the incapable of compatibility and stability for the tracking method of fixed step

enables the PV-VSG to provide inertial and damping support control quickly and accurately. Simulation results verify the effectiveness of the proposed control strategy.

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