在 DQ 参考框架下开发混合 SOGI-Resonant 控制器,用于非线性负载下 VSI 的解耦 PQ 控制

IF 1.6 4区 工程技术 Q3 ENGINEERING, ELECTRICAL & ELECTRONIC Electrical Engineering Pub Date : 2024-09-10 DOI:10.1007/s00202-024-02688-y
Abhishek Majumder, Sumana Chowdhuri
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引用次数: 0

摘要

最近,人们对并网和孤岛模式下直流/交流转换器的电能质量(PQ)改善和控制策略的关注度急剧上升。使用 PI、PR 和滞后控制器的传统单回路和多回路控制拓扑被广泛用于系统稳定性、电流控制和改善电能质量。然而,这些拓扑结构在非理想条件下面临着巨大挑战,例如带有非线性或不平衡负载的逆变器。本文提出了一种新颖的混合 SOGI-Resonant 控制器 (HSRC),以应对同时进行谐波补偿以及有功和无功功率参考跟踪解耦的挑战。HSRC 设计用于适应不断变化的负载模式,并缓解非线性负载产生的谐波。它将二阶广义积分器 (SOGI) 纳入了基于同步旋转参考帧 (SRRF) 的 PI 控制方案。作为一个陷波滤波器,SOGI 可改善基于负载电流谐波的参考生成。HSRC 结合了谐振控制器和级联 PI 控制器的优点,无需频繁转换参考帧。在非线性负载和不平衡负载相结合的情况下,所提出的拓扑结构显著改善了并网逆变器 (GTI) 的性能,无需为正序和负序信号分别设置控制器,并减轻了计算负担。它提供独立的有功和无功功率控制以及谐波补偿,确保在非线性负载条件下无缝运行。论文详细介绍了 HSRC 的设计和调谐方法,并通过不同负载的三相 GTI 并网运行验证了其功效。结果表明,总谐波失真大幅降低,凸显了 HSRC 在实际应用中提高电能质量的潜力。
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Development of Hybrid SOGI-Resonant Controller in DQ reference frame for decoupled PQ control of a VSI under nonlinear loading

Recent interest in Power Quality (PQ) enhancement and control strategies for DC/AC converters in grid-tied and islanded modes has surged. Conventional single-loop and multi-loop control topologies using PI, PR, and hysteresis controllers are widely used for system stability, current control, and PQ improvement. However, these topologies face significant challenges under non-ideal conditions, such as inverters with nonlinear or unbalanced loads. This paper addresses the challenges of simultaneous harmonic compensation and decoupled active and reactive power reference tracking by proposing a novel Hybrid SOGI-Resonant Controller (HSRC). The HSRC is designed to adapt to changing load patterns and mitigate harmonics generated by nonlinear loads. It incorporates a Second Order Generalized Integrator (SOGI) into a synchronously rotating reference frame (SRRF)-based PI-control scheme. Acting as a notch filter, the SOGI improves reference generation based on load current harmonics. The HSRC combines the benefits of Resonant controllers with cascaded PI controllers without frequent reference frame conversions. The proposed topology demonstrates significant improvement in grid-tied inverter (GTI) performance with nonlinear loads and unbalanced load combined, eliminating the need for separate controllers for positive and negative sequence signals and reducing computational burden. It provides independent control of active and reactive power alongside harmonic compensation, ensuring seamless operation under nonlinear loading conditions. The paper details the design and tuning methodology of the HSRC and verifies its efficacy through the grid-tied operation of a three-phase GTI with different loads. Results show a substantial reduction in total harmonic distortion, highlighting the HSRC's potential for enhancing power quality in practical applications.

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来源期刊
Electrical Engineering
Electrical Engineering 工程技术-工程:电子与电气
CiteScore
3.60
自引率
16.70%
发文量
0
审稿时长
>12 weeks
期刊介绍: The journal “Electrical Engineering” following the long tradition of Archiv für Elektrotechnik publishes original papers of archival value in electrical engineering with a strong focus on electric power systems, smart grid approaches to power transmission and distribution, power system planning, operation and control, electricity markets, renewable power generation, microgrids, power electronics, electrical machines and drives, electric vehicles, railway electrification systems and electric transportation infrastructures, energy storage in electric power systems and vehicles, high voltage engineering, electromagnetic transients in power networks, lightning protection, electrical safety, electrical insulation systems, apparatus, devices, and components. Manuscripts describing theoretical, computer application and experimental research results are welcomed. Electrical Engineering - Archiv für Elektrotechnik is published in agreement with Verband der Elektrotechnik Elektronik Informationstechnik eV (VDE).
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