民用建筑中光伏逆变器集群谐振机理及分层协调控制

doi:10.3969/j.issn.1008-0198.2023.04.005

湖南电力 ›› 2023, Vol. 43 ›› Issue (4): 32-39.doi: 10.3969/j.issn.1008-0198.2023.04.005

民用建筑中光伏逆变器集群谐振机理及分层协调控制

丁劲松^1,2, 姚鸿德¹, 李圣清¹, 孟焕平³, 朱辉⁴

1.湖南工业大学电气与信息工程学院, 湖南株洲 412007;
2.湖南科瑞变流电气股份有限公司, 湖南株洲 412007;
3.湖南省建筑设计院集团股份有限公司, 湖南长沙 410012;
4.湖南红太阳光电科技有限公司, 湖南长沙 410007

收稿日期:2023-03-17 修回日期:2023-05-18 出版日期:2023-08-25 发布日期:2023-09-07
通信作者: 李圣清(1961),男,博士,博士生导师,通信作者,主要研究方向为光伏并网控制及电能质量治理。
作者简介:丁劲松(1970),男,硕士,研究生导师,主要研究方向为光伏并网控制、大功率整流器、自动化控制。
基金资助:
国家自然科学基金项目(51977072);湖南省住房和城乡建设厅项目(KY202220)。

Mechanism and Hierarchical Coordinated Control of Solar Photovoltaic Inverter Cluster Resonance in Civil Buildings

DING Jinsong^1,2, YAO Hongde¹, LI Shengqing¹, MENG Huanping³, ZHU Hui⁴

1. School of Electrical and Information Engineering, Hunan University of Technology, Zhuzhou 412007, China;
2. Hunan Kori Convertors Electric Co., Ltd, Zhuzhou 412007, China;
3. Hunan Architectural Design Institute Group Co., Ltd, Changsha 410012, China;
4. Hunan Red Sun Photoelectricity Science and Technology Co., Ltd, Changsha 410007, China

Received:2023-03-17 Revised:2023-05-18 Online:2023-08-25 Published:2023-09-07

摘要/Abstract

摘要： 民用建筑中光伏逆变器集群并网易引发谐波谐振,严重影响系统稳定及电能质量。针对这一问题,建立光伏逆变器集群并网数学模型,推导单台逆变器及逆变器集群谐振机理与谐振特性,提出一种光伏逆变器集群谐振分层协调控制策略。第一层,针对LCL型光伏逆变器固有谐振,提出基于前向通道串联陷波器的电容电压惯性反馈的有源阻尼法;第二层,针对光伏逆变器集群与电网阻抗耦合产生的谐振,提出公共耦合点并联虚拟导纳的谐振抑制方法;通过对逆变器集群并网谐振进行分层划分协调控制,提高并网电流质量。仿真结果表明,与传统电容电流反馈策略相比,并网电流谐波畸变率明显下降,有效抑制逆变器并网谐振,证明了所提策略的可行性。

关键词: 逆变器集群, 谐振机理, 协调控制

Abstract: The clustering of photovoltaic(PV) inverter in residential buildings is prone to harmonic resonance, which seriously affects system stability and power quality. To address this problem, a mathematical model of PV inverter clusters connected to the grid is established, the resonance mechanism and resonance characteristics of single inverters and inverter clusters are derived, and a hierarchical coordination control strategy for PV inverter cluster resonance is proposed. In the first layer, for the inherent resonance of LCL-type PV inverters, an active damping method based on capacitor-voltage inertia feedback with forward-channel series trap is proposed.In the second layer, for the resonance generated by the coupling of PV inverter clusters with grid impedance,a method for suppressing the resonance of parallel virtual admittance of common coupling points is proposed.The grid-connected current quality is improved through the hierarchical division and coordinated control of the grid-connected resonance of inverter clusters.The simulation results show that compared with the traditional capacitor current feedback strategy, the harmonic distortion rate of grid-connected current decreases obviously, and the grid-connected resonant of the inverter is effectively suppressed, which proves the feasibility of the proposed strategy.

Key words: inverter cluster, resonance mechanism, coordination control

中图分类号:

TM464

丁劲松, 姚鸿德, 李圣清, 孟焕平, 朱辉. 民用建筑中光伏逆变器集群谐振机理及分层协调控制[J]. 湖南电力, 2023, 43(4): 32-39.

DING Jinsong, YAO Hongde, LI Shengqing, MENG Huanping, ZHU Hui. Mechanism and Hierarchical Coordinated Control of Solar Photovoltaic Inverter Cluster Resonance in Civil Buildings[J]. Hunan Electric Power, 2023, 43(4): 32-39.

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民用建筑中光伏逆变器集群谐振机理及分层协调控制

Mechanism and Hierarchical Coordinated Control of Solar Photovoltaic Inverter Cluster Resonance in Civil Buildings

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