Single-stage Grid-connected Inverter with Polymorphic Energy and Its Control Strategy

ZHAO Wei; ZHONG Shanlin; SUN Xiaofeng; QI Lei; ZHANG Yuliang

doi:10.7500/AEPS20241205001

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Single-stage Grid-connected Inverter with Polymorphic Energy and Its Control Strategy

Application Research | 更新时间：2026-02-28

- Single-stage Grid-connected Inverter with Polymorphic Energy and Its Control Strategy
- Automation of Electric Power Systems Vol. 49, Issue 24, Pages: 160-170(2025)
- 作者机构：
  
  1.河北省电力电子节能与传动控制重点实验室（燕山大学），河北省秦皇岛市 066004
  2.石家庄通合电子科技股份有限公司，河北省石家庄市 050035
- 作者简介：
- 基金信息：
  
  Hebei Provincial Natural Science Foundation of China(E2024203258);the Central Government Guide Local Science and Technology Development Fund Project(236Z2101G);Hebei Provincial Natural Science Foundation for Young Scientists(E2024203170)
- DOI：10.7500/AEPS20241205001
  CLC：
- Received：05 December 2024，
  
  Revised：2025-06-25，
  
  Online First：29 September 2025，
  
  Published：25 December 2025
- 稿件说明：
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赵巍,钟善林,孙孝峰等.多态能源单级并网逆变器及其控制策略[J].电力系统自动化,2025,49(24):160-170.

ZHAO Wei,ZHONG Shanlin,SUN Xiaofeng,et al.Single-stage Grid-connected Inverter with Polymorphic Energy and Its Control Strategy[J].Automation of Electric Power Systems,2025,49(24):160-170.
赵巍,钟善林,孙孝峰等.多态能源单级并网逆变器及其控制策略[J].电力系统自动化,2025,49(24):160-170. DOI： 10.7500/AEPS20241205001.

ZHAO Wei,ZHONG Shanlin,SUN Xiaofeng,et al.Single-stage Grid-connected Inverter with Polymorphic Energy and Its Control Strategy[J].Automation of Electric Power Systems,2025,49(24):160-170. DOI： 10.7500/AEPS20241205001.

摘要

针对多种新能源协同并网问题，提出了一种多态能源单级并网逆变器拓扑，采用二极管钳位型三电平电路与半桥电路组合拓扑，构建出3个直流端口，可分别接入光伏、燃料电池、储能电池3种能源，确保了所有直流端口与交流端口之间的单级变换特性。面对直流侧电压波动问题，提出了一种可实现各直流端口功率灵活控制的虚拟空间矢量脉宽调制策略。通过构建虚拟矢量，调整其中实际矢量的作用时间，实现了对直流侧各端口功率的有效控制，并设计了一种将能源运行状态作为调节因素且与调制策略匹配的参考控制策略。最后，在硬件在环实时数字仿真平台上验证了所述多态能源单级并网逆变器以及控制策略的可行性。

Abstract

To address the issue of coordinating the grid connection of multiple renewable energy sources

a single-stage grid-connected inverter with polymorphic energy is proposed. By adopting a combined topology of diode-clamped three-level and half-bridge circuits

three DC ports are constructed

which can respectively connect to three types of energy sources: photovoltaic

fuel cell

and energy storage battery. This ensures the single-stage transformation characteristics between all DC ports and the AC port. Aiming at the problem of DC-side voltage fluctuation

this paper proposes a virtual space vector pulse width modulation strategy to achieve flexible power control at each DC port. By constructing virtual vectors and adjusting the effective duration of the actual vectors

the effective control of power at each DC port on the DC side is achieved. A reference control strategy that takes the energy operation status as a regulation factor and matches the modulation strategy is also designed. Finally

the feasibility of the proposed single-stage grid-connected inverter with polymorphic energy and its control strategy is verified on the hardware-in-the-loop(HIL) real-time digital simulation platform.

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Keywords

references

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