LCL型电力弹簧的设计及控制策略研究*

doi:10.11985/2021.02.025

电气工程学报 ›› 2021, Vol. 16 ›› Issue (2): 199-208.doi: 10.11985/2021.02.025

• 新能源发电与电能存储 • 上一篇

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LCL型电力弹簧的设计及控制策略研究^*

袁昌海(), 丘东元(), 张波()

华南理工大学电力学院广州 510000

收稿日期:2021-01-18 修回日期:2021-04-21 出版日期:2021-06-25 发布日期:2021-08-05
作者简介:袁昌海,男,1995年生,硕士研究生。主要研究方向为电力弹簧拓扑及其控制。E-mail： 1115645087@qq.com
丘东元,女,1972年生,教授,博士研究生导师。主要研究方向为电力弹簧、无线电能传输、故障检测和电力电子系统潜电路分析。E-mail： epdyqiu@scut.edu.cn
张波,男,1962年生,教授,博士研究生导师。主要研究方向为非线性分析、电力电子变换器和系统的建模和控制、无线电能传输理论及应用。E-mail： epbzhang@scut.edu.cn
基金资助:
* 广东省自然科学基金面上(2020A1515011571);广东省自然科学基金研究团队(2017B030312001)

Design and Control Strategy of LCL Electric Spring

YUAN Changhai(), QIU Dongyuan(), ZHANG Bo()

School of Electric Power, South China University of Technology, Guangzhou 510000

Received:2021-01-18 Revised:2021-04-21 Online:2021-06-25 Published:2021-08-05

摘要/Abstract

摘要：

近年来受到关注的电力弹簧(Electric spring, ES)是一种新兴电能质量调节手段,能够有效解决可再生能源并网所造成的电压波动等问题。对现有ES的拓扑结构进行总结,提出了一种基于LCL滤波器的新型ES(简称LCL-ES)。不同于现有ES与非关键负载串联的方式,LCL-ES把非关键负载作为LCL滤波器的无源阻尼,从而将无源阻尼损耗大的缺点转化为ES补偿功率范围更大的优点。采用相量图法分析了LCL型电力弹簧的电压调节性能,进而得到了其网侧电压波动范围。通过仿真和试验结果验证了LCL型电力弹簧用于稳压的有效性及其稳态运行范围分析结果。

关键词: 电力弹簧, 拓扑, LCL滤波器, 分布式发电

Abstract:

Electric spring (ES), which has received attention in recent years, is an emerging power quality adjustment method that can effectively solve the power quality problem such as grid voltage fluctuations caused by grid connection of renewable energy. The existing electric spring topologies are first summarized and then an LCL-ES based on the LCL filter is proposed. Unlike the existing topology in which non-critical load and ES are connected in series, LCL-ES uses non-critical load as a passive damper for the LCL filter, which converts the disadvantage of the large power loss into the advantage of larger power range. Then, the phasor diagram method is used to analyze the voltage regulation performance of the LCL-ES, and then the grid-side voltage fluctuation range is obtained. Finally, the effectiveness of the LCL-ES for voltage stabilization and its steady-state operating range are verified through simulation and experimental results.

Key words: Electric spring, topology, LCL filter, distributed generation

中图分类号:

TM732

袁昌海, 丘东元, 张波. LCL型电力弹簧的设计及控制策略研究^*[J]. 电气工程学报, 2021, 16(2): 199-208.

YUAN Changhai, QIU Dongyuan, ZHANG Bo. Design and Control Strategy of LCL Electric Spring[J]. Journal of Electrical Engineering, 2021, 16(2): 199-208.

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类别	参数	数值
LCL-ES	额定功率S_n/(kV·A)	30
	开关频率f_s/kHz	10
	直流侧电压V_dc/V	1 500
	直流侧电容C_dc/μF	1 500
	并网电感L_gf/mH	6.366
	滤波电感L_ff/mH	1
	滤波电容C_f/μF	10
	a=ω_oL_gf/R_ncl	0.4
负载	关键负载Z_cl/Ω	28
负载	非关键负载R_ncl/Ω	5
电网	传输线电感L₁/mH	8
	传输线电阻R₁/Ω	3.5
	电网频率f_o/Hz	50
	PCC相电压额定有效值/V	220

LCL型电力弹簧的设计及控制策略研究^*

Design and Control Strategy of LCL Electric Spring

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