配电网中存储和分布式发电逆变器负载侧电压-功率自协调控制系统

IF 6 2区工程技术 Q1 ENGINEERING, MULTIDISCIPLINARY

Ain Shams Engineering Journal Pub Date : 2025-05-19 DOI:10.1016/j.asej.2025.103480

Weiqi Zhang , Chuanyu Sun , Mohammed Alharbi , Hany M. Hasanien , Kai Song

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引用次数: 0

摘要

交流配电网负荷侧运行状态和时变电力需求的不确定性，严重影响了系统的输出模式配置和可持续存储与分布式发电逆变器的安全。为了提高多模控制系统的自协调输出能力，简化系统的复杂度，本文创新性地设计了一种基于滑模控制的电压-功率自协调控制系统。首先，建立了典型sdgi的输电模型，在分析有功和无功约束下输出电压特性的基础上，提出了虚拟补偿电压，构建了电压-功率自协调控制关系；其次，实际应用SMC策略，巧妙组合实现控制系统中各模块的功能，并根据SMC控制律的特点分析其稳定性。最后，设计了多工况仿真和实验验证。结果表明，与传统鲁棒控制策略相比，该策略使SDGI的输出功率精度平均提高2.19%，输出电压谐波平均减少1.43%，负载侧功率波动时系统输出状态自协调变换的平均响应时间仅为0.021 s，平均减少0.043 s。这有效地增强了SDGI的鲁棒性及其输出性能对电网侧功率变化和电压暂降的响应。

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A voltage-power self-coordinated control system on the load-side of storage and distributed generation inverters in distribution grid

The uncertainty of the load-side operating state and time-varying power demand in the AC distribution grid seriously affects the output mode configuration and sustainable storage and distributed generation inverters (SDGIs) security. To enhance the self-coordinated output capability and simplify the complexity of multi-mode control systems, this paper innovatively designs a voltage-power self-coordinated control system utilizing sliding mode control (SMC). Firstly, a power transmission model for typical SDGIs is established, and based on the analysis of output voltage characteristics under active and reactive power constraints, the virtual compensation voltage is proposed to construct a voltage-power self-coordinated control relationship. Next, the SMC strategy is practically applied to implement the functions of each module in the control system through skillful combination, and its stability is analyzed based on the characteristics of the SMC control law. Finally, multi-condition simulation and experimental verification are designed. The results indicate that compared to traditional robust control strategies, the proposed strategy achieves an average improvement of 2.19 % in the output power accuracy of the SDGI, reduces the average output voltage harmonic by 1.43 %, and exhibits an average response time of only 0.021 s for the self-coordinated transformation of the system output state during load-side power fluctuations, which is a reduction of 0.043 s on average. This effectively enhances the robustness of the SDGI and its output performance in response to power variation and voltage sag at the grid side.

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来源期刊

Ain Shams Engineering Journal Engineering-General Engineering

CiteScore

10.80

自引率

13.30%

发文量

441

审稿时长

49 weeks

期刊介绍： in Shams Engineering Journal is an international journal devoted to publication of peer reviewed original high-quality research papers and review papers in both traditional topics and those of emerging science and technology. Areas of both theoretical and fundamental interest as well as those concerning industrial applications, emerging instrumental techniques and those which have some practical application to an aspect of human endeavor, such as the preservation of the environment, health, waste disposal are welcome. The overall focus is on original and rigorous scientific research results which have generic significance. Ain Shams Engineering Journal focuses upon aspects of mechanical engineering, electrical engineering, civil engineering, chemical engineering, petroleum engineering, environmental engineering, architectural and urban planning engineering. Papers in which knowledge from other disciplines is integrated with engineering are especially welcome like nanotechnology, material sciences, and computational methods as well as applied basic sciences: engineering mathematics, physics and chemistry.