共直流母线微网逆变器并联环流抑制策略

李善寿; 徐兴; 方潜生; 黄梅初; 陈涛

doi:10.19783/j.cnki.pspc.251232

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共直流母线微网逆变器并联环流抑制策略

工程应用 | 更新时间：2026-06-18

- 共直流母线微网逆变器并联环流抑制策略
- Circulating current suppression strategy for parallel microgrid inverters with common DC bus
- 电力系统保护与控制 2026年54卷第11期
- 作者机构：
  
  安徽省智能建筑与建筑节能重点实验室 (安徽建筑大学),安徽,合肥,230022
- 作者简介：
- 基金信息：
- DOI：10.19783/j.cnki.pspc.251232
  中图分类号：
- 纸质出版：2026
- 稿件说明：
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李善寿, 徐兴, 方潜生, 等. 共直流母线微网逆变器并联环流抑制策略[J]. 电力系统保护与控制, 2026,54(11).

LI Shanshou, XU Xing, FANG Qiansheng, et al. Circulating current suppression strategy for parallel microgrid inverters with common DC bus[J]. Power System Protection and Control, 2026, 54(11).
李善寿, 徐兴, 方潜生, 等. 共直流母线微网逆变器并联环流抑制策略[J]. 电力系统保护与控制, 2026,54(11). DOI： 10.19783/j.cnki.pspc.251232.

LI Shanshou, XU Xing, FANG Qiansheng, et al. Circulating current suppression strategy for parallel microgrid inverters with common DC bus[J]. Power System Protection and Control, 2026, 54(11). DOI： 10.19783/j.cnki.pspc.251232.

摘要

针对共直流母线多逆变器并联环流抑制问题，在分析三相四桥臂逆变器并联系统的环流回路及激励源特性基础上，研究了在虚拟同步发电机 (virtual synchronous generator

VSG) 中引入虚拟阻抗所导致的环流振荡及低频环流累积效应。在此基础上，提出了一种基于滑模控制 (sliding mode control

SMC) 的环流抑制策略。所提策略基于 Lyapunov 稳定性理论设计，即通过在控制环路中引入指数趋近律，生成等效反向激励源，从而实现瞬时环流的抑制。同时，利用滑模面导数的比例负反馈环节调整调制波幅值增益，以实现对低频环流的抑制。在载波频率分别为 15 kHz 和 20 kHz 且滤波器参数不匹配的典型工况下，仿真结果显示，零序环流峰值由 1.6 A 降至 0.9 A，低频环流的累积效应得到了有效抑制。实验平台测得环流峰值由 5 A 降至 2.5 A，进一步验证了所提策略在实际工程中的可行性与有效性。

Abstract

To address the issue of circulating current suppression in parallel common DC-bus multi-inverter systems

this paper analyzes the circulating current loop and excitation source characteristics of a three-phase four-leg inverter parallel system. Based on this analysis

the circulating current oscillation and low-frequency circulating current cumulation effects caused by introducing virtual impedance into the virtual synchronous generator (VSG) control strategy are investigated. On this basis

a circulating current suppression strategy based on sliding mode control (SMC) is proposed. The proposed strategy is designed according to Lyapunov stability theory. Specifically

an exponential reaching law is introduced into the control loop to generate an equivalent reverse excitation source

thereby suppressing instantaneous circulating currents. Meanwhile

a proportional negative-feedback term based on the derivative of the sliding surface is employed to adjust the modulation wave amplitude gain

thereby mitigating low-frequency circulating currents. Under typical operating conditions with carrier frequencies of 15 kHz and 20 kHz and mismatched filter parameters

simulation results show that the peak zero-sequence circulating current is reduced from 1.6 A to 0.9 A

effectively suppressing the cumulation effect of low-frequency circulating currents. Experimental tests on a hardware platform further demonstrate a reduction in the circulating current peak from 5 A to 2.5 A

thereby validating the feasibility and effectiveness of the proposed strategy in practical engineering applications.

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references

CHEN S, SUN Y, HAN H, et al. Dynamic frequency performance analysis and improvement for parallel VSG systems considering virtual inertia and damping coefficient[J]. IEEE Journal of Emerging and Selected Topics in Power Electronics, 2023, 11(1): 478-489.

ZHOU S, LIU K, CHEN Y, et al. Minimal zero-sequence circulating current modulation strategy based on equivalent vector redundancy for two paralleled inverters[J]. IEEE Transactions on Transportation Electrification, 2025, 11(3): 8629-8640.

MATTHEWS P D, NARM H G, EBRAHIMI J, et al. A control strategy for parallel three-phase inverters in motor drives[J]. IEEE Open Journal of Power Electronics, 2025, 6: 1815-1827.

KIM K, PARK Y. A feedforward-prevailing control method to improve dynamic responses for paralleled inverters with small interfacing inductors[J]. IEEE Transactions on Transportation Electrification, 2025, 11(3): 7967-7978.

AVAN G G D V S, KAARTHIK R S. Circulating current reduction in parallel grid connected two level VSI using hybrid carrier based modulation[C] // 2020 IEEE International Conference on Power Electronics, Drives and Energy Systems (PEDES), December 16-19, 2020, Jaipur, India: 1-6.

TCAI A, KWON Y, PUGLIESE S, et al. Reduction of the circulating current among parallel NPC inverters[J]. IEEE Transactions on Power Electronics, 2021, 36(11): 12504-12514.

CHOI H W, LEE K B. Circulating current reduction for parallel-connected modular inverters based on suppression of common-mode voltage[J]. IEEE Transactions on Power Electronics, 2023, 38(9): 11091-11101.

HE S, SUN A, LIU B. Zero-sequence circulating current analysis and suppression for multimodular interleaved parallel inverters[J]. IEEE Journal of Emerging and Selected Topics in Power Electronics, 2022, 10(6): 7000-7013.

ZHANG Q, XING X, SUN K. Space vector modulation method for simultaneous common mode voltage and circulating current reduction in parallel three-level inverters[J]. IEEE Transactions on Power Electronics, 2019, 34(4): 3053-3066.

GURUGUBELLI V, GHOSH A, PANDA A K. Parallel inverter control using different conventional control methods and an improved virtual oscillator control method in a standalone microgrid[J]. Protection and Control of Modern Power Systems, 2022, 7(3): 393-405.

LIU X, LIU T, CHEN A, et al. Suppression of circulating currents for paralleled three-level T-type inverters under unbalanced operating conditions[C] // 2020 IEEE Applied Power Electronics Conference and Exposition (APEC), March 15-19, 2020, New Orleans, LA, USA: 3003-3007.

REN B, SUN X, YU M, et al. Circulating current analysis and the improved D-Σ digital control strategy for multiparalleled three-level T-type grid-connected inverters[J]. IEEE Transactions on Industrial Electronics, 2020, 67(4): 2810-2821.

TAO Z, HU B, YE M, et al. Interference suppression of circulating current fluctuation based on equivalent input disturbance in parallel inverters[C] // 2023 IEEE 6th International Conference on Industrial Cyber-Physical Systems (ICPS), May 8-11, 2023, Wuhan, China: 1-6.

LI G, YU H, LIU Z. Research on zero sequence circulating current suppression of parallel inverter system with common AC and DC bus[C] // 2021 IEEE 5th Conference on Energy Internet and Energy System Integration (EI2), October 22-25, 2021, Taiyuan, China: 3800-3804.

WEI B, GUERRERO J M, VASQUEZ J C, et al. A circulating-current suppression method for parallel-connected voltage-source inverters with common DC and AC buses[J]. IEEE Transactions on Industry Applications, 2017, 53(4): 3758-3769.

TAKONGMO M, ZHANG C, WDAAN S, et al. Parallel-connected voltage source converters with a DC common mode and an AC differential mode PWM filter[J]. IEEE Transactions on Power Electronics, 2023, 38(3): 3664-3675.

SUN K, LIN X, LI Y, et al. Improved modulation mechanism of parallel-operated T-type three-level PWM rectifiers for neutral-point potential balancing and circulating current suppression[J]. IEEE Transactions on Power Electronics, 2018, 33(9): 7466-7479.

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