基于储能协调的光储微网VSG控制策略研究

doi:10.11985/2023.01.025

摘要/Abstract

摘要：

光储微网独立运行时受到光照强度变化或负荷扰动时，系统频率稳定性无法满足要求。针对此问题，提出一种基于储能协调的光储微网改进虚拟同步电机(Virtual synchronous generator，VSG)控制策略。首先，对VSG控制策略进行改进，用以消除负载扰动带来的频率偏差。同时通过协调控制策略得到VSG控制器的给定参考有功功率，调整蓄电池储能充电状态(State of charge，SOC)，用来平抑光照强度变化带来的频率偏差。其次，建立基于储能协调的光储微网改进VSG控制系统小信号模型进行参数整定设计。最后，建立系统仿真模型进行仿真验证，仿真结果验证了该方法的可行性。

关键词: 微网, VSG, 积分补偿器, 协调控制

Abstract:

When the optical storage microgrid operates independently, the system frequency stability cannot meet the requirements when it is subject to light intensity change or load disturbance. To solve this problem, an improved virtual synchronous generator(VSG) control strategy of optical storage microgrid based on energy storage coordination is proposed. Firstly, the VSG control strategy is improved to eliminate the frequency deviation caused by load disturbance. At the same time, the given reference active power of VSG controller is obtained through coordinated control strategy, and the battery energy storage state of charge(SOC) is adjusted to stabilize the frequency deviation caused by the change of illumination intensity. Secondly, the small signal model of improved VSG control system based on energy storage coordination is established for parameter tuning design. Finally, the system simulation model is established for simulation verification, and the simulation results verify the feasibility of the method.

Key words: Microgrid, virtual synchronous generator, integral compensator, coordination control

中图分类号:

TM73

张常友, 朱作滨. 基于储能协调的光储微网VSG控制策略研究[J]. 电气工程学报, 2023, 18(1): 228-234.

ZHANG Changyou, ZHU Zuobin. Research on VSG Control Strategy of Optical Storage Microgrid Based on Energy Storage Coordination[J]. Journal of Electrical Engineering, 2023, 18(1): 228-234.

图/表 16

图1

图2

图3

图4

图5

图6

图7

图8

图9

图10

图11

表1

图12

图13

图14

图15

参考文献 19

[1]	张建华, 黄伟. 微电网运行控制与保护技术[M]. 北京: 中国电力出版社, 2010.
	ZHANG Jianhua, HUANG Wei. Micro-grid operation control and protection technology[M]. Beijing: China Electric Power Press, 2010.
[2]	张宇涵, 杜贵平, 雷雁雄, 等. 直流微网混合储能系统控制策略现状及展望[J]. 电力系统保护与控制, 2021, 49(3):177-187.
	ZHANG Yuhan, DU Guiping, LEI Yanxiong, et al. Current status and prospects of control strategy for a DC microgrid hybrid energy storage system[J]. Power System Protection and Control, 2021, 49(3):177-187.
[3]	LIU J, MIURA Y, ISE T. Fixed-parameter damping methods of virtual synchronous generator control using state feedback[J]. IEEE Access, 2019, 8(7):177-190.
[4]	张骞, 李征, 蔡旭, 等. 一种电网强度在线感知的自适应虚拟同步控制策略[J]. 电力系统保护与控制, 2019, 47(21):117-125.
	ZHANG Qian, LI Zheng, CAI Xu, et al. An adaptive VSG strategy based on online grid impedance measurements[J]. Power System Protection and Control, 2019, 47(21):117-125.
[5]	ALIPOO R, MIURA Y, ISE T, et al. Power system stabilization using virtual-synchronous generator with alternating moment of inertia[J]. IEEE Journal of Eermging & Selected Topics in Power Electronics, 2015, 32(2):451-458.
[6]	朱作滨, 黄绍平. 基于自适应转动惯量VSG的微电网稳定控制[J]. 电气工程学报, 2020, 15(1):41-47.
	ZHU Zuobin, HUANG Shaoping. Microgrid stability control based on adaptive rotating inertia VSG[J]. Journal of Electrical Engineering, 2020, 15(1):41-47.
[7]	张福东, 朴政国, 郭裕祺, 等. VSG转动惯量的自适应控制策略研究[J]. 太阳能学报, 2020, 41(10):93-100.
	ZHANG Fudong, PIAO Zhengguo, GUO Yuqi, et al. Research on adaptive control strategy of VSG rotational inertia[J]. Acta Energiale Solaris Sinica, 2020, 41(10):93-100.
[8]	李彦哲, 郭旭, 董海鹰, 等. 独立微网中自适应转动惯量的VSG控制策略[J]. 电力系统及其自动化学报, 2020, 32(12):144-150.
	LI Yanzhe, GUO Xu, DONG Haiying, et al. VSG control strategy for adaptive rotational inertia in island micro-grid[J]. Proceedings of the CSU-EPSA, 2020, 32(12):144-150.
[9]	查雨欣, 林健, 王悦, 等. 基于广义下垂控制的光伏发电系统的惯量特性分析[J]. 智慧电力, 2021, 49(2):54-59,68.
	ZHA Yuxin, LIN Jian, WANG Yue, et al. Analysis of inertia characteristics of photovoltaic power generation system based on generalized droop control[J]. Smart Power, 2021, 49 (2):54-59,68.
[10]	HU Yalong, WEI Wei, PENG Yonggang, et al. Fuzzy virtual inertia control for virtual synchronous generator[C]// Proceedings of the 35th Chinese Control Conference, 2016, 4(60):8523-8567.
[11]	张涛, 郑家琪, 王福东, 等. 基于模糊控制的VSG转动惯量自适应算法[J]. 电力电子技术, 2021, 55(1):40-44.
	ZHANG Tao, ZHENG Jiaqi, WANG Fudong, et al. VSG moment of inertia adaptive algorithm based on fuzzy control[J]. Power Electronics, 2021, 55 (1):40-44.
[12]	张赟宁, 周小萌. 并网逆变器分数阶虚拟惯性的虚拟同步发电机控制技术[J]. 控制与决策, 2021, 36(2):463-468.
	ZHANG Yunning, ZHOU Xiaomeng. Virtual synchronous generator control technology with fractional virtual inertia of grid-connected inverters[J]. Control and Decision, 2021, 36(2):463-468.
[13]	禹红, 夏向阳, 彭梦妮, 等. 基于虚拟同步电机技术混合储能平抑微网频率波动策略研究[J]. 电力系统保护与控制, 2018, 46(22):47-54.
	YU Hong, XIA Xiangyang, PENG Mengni, et al. Research on strategy of microgrid frequency control in hybrid energy storage system based on virtual synchronous generator technolog[J]. Power System Protection and Control, 2018, 46(22):47-54.
[14]	朱作滨, 张常友, 曾小斌. 基于自适应旋转惯量VSG控制策略光储微网系统[J]. 电力系统及其自动化学报, 2021, 33(3):67-72.
	ZHU Zuobin, ZHANG Changyou, ZENG Xiaobin. Photovoltaic energy storage microgrid system based on adaptive rotating inertia VSG control strategy[J]. Proceedings of the CSU-EPSA, 2021, 33(3):67-72.
[15]	高长伟, 刘晓明, 樊爱龙. 分布式逆变电源改进型虚拟同步发电机控制策略研究[J]. 太阳能学报, 2020, 41(12):33-39.
	GAO Changwei, LIU Xiaoming, FAN Ailong. Control strategy of improved virtual synchronous generator for distributed generation[J]. Acta Energiae Solaris Sinica, 2020, 41(12):33-39.
[16]	邢东峰, 田铭兴. 虚拟同步发电机频率特性与储能设备容量及充放电特性的关系[J]. 电网技术, 2021, 45(9):3582-3590.
	XING Dongfeng, TIAN Mingxing. Relationship between frequency characteristics of virtual synchronous generator and parameters of energy storage equipment[J]. Power System Technology, 2021, 45(9):3582-3590.
[17]	程子霞, 于洋, 柴旭峥. 基于协同自适应控制的光储VSG运行控制研究[J]. 电力系统保护与控制, 2020, 48(24):79-85.
	CHENG Zixia, YU Yang, CHAI Xuzheng. Research on operation control of a photovoltaic system with storage VSG based on cooperative adaptive control[J]. Power System Protection and Control, 2020, 48(24):79-85.
[18]	陈来军, 王任, 郑天文, 等. 基于参数自适应调节的虚拟同步发电机暂态响应优化控制[J]. 中国电机工程学报, 2016, 36(21):5724-5731,6014.
	CHEN Laijun, WANG Ren, ZHENG Tiantian, et al. Optimal control of transient response of virtual synchronous generator based on adaptive parameter adjustment[J]. Proceedings of the CSEE, 2016, 36(21):5724-5731,6014.
[19]	任自盼, 鲁宝春, 赵亚龙, 等. 光伏虚拟同步发电机建模与仿真研究[J]. 电力系统保护与控制, 2019, 47(13):92-99.
	REN Zipan, LU Baochun, ZHAO Yalong, et al. Research on modeling and simulation of photovoltaic virtual synchronous generator[J]. Power System Protection and Control, 2019, 47(13):92-99.

参数	数值	参数	数值
P_ref/kW	10	Q_ref/Var	0
V_dc/V	800	C/F	1.5×10^-5
L/H	0.001	U_n/V	311
J	0.5	k_ii	1 200
k_p	2	k_i	1