孤岛微电网的虚拟同步发电机分布式协同二次调频控制*

doi:10.11985/2024.01.036

电气工程学报 ›› 2024, Vol. 19 ›› Issue (1): 334-343.doi: 10.11985/2024.01.036

• 新能源发电与电能存储 • 上一篇下一篇

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孤岛微电网的虚拟同步发电机分布式协同二次调频控制^*

李斌¹^,²(), 龚祥祥¹^,²(), 胡丹丹³, 曾志辉¹, 王浩¹^,²

1.河南理工大学电气工程与自动化学院焦作 454003
2.河南理工大学河南省智能装备直驱技术与控制国际联合实验室焦作 454003
3.国网河南省电力公司焦作供电公司焦作 454003

收稿日期:2023-04-14 修回日期:2023-05-24 出版日期:2024-03-25 发布日期:2024-04-25
作者简介:李斌，男，1987年生，博士，讲师。主要研究方向为新能源并网发电、微电网构架与控制。E-mail：libin@hpu.edu.cn;
龚祥祥，男，1997年生，硕士研究生。主要研究方向为微电网分布式控制与稳定运行。E-mail：gongxiangxiang157@163.com
基金资助:
河南省自然科学基金(2122300410147);河南省科技攻关(222102220034);河南省科技攻关(232102240036);河南理工大学基础研究(NSFRF230616)

Distributed Cooperative Secondary Frequency Modulation Control of Virtual Synchronous Generator in Islanded Microgrid

LI Bin¹^,²(), GONG Xiangxiang¹^,²(), HU Dandan³, ZENG Zhihui¹, WANG Hao¹^,²

1. School of Electrical Engineering and Automation, Henan Polytechnic University, Jiaozuo 454003
2. Henan International Joint Laboratory of Direct Drive and Control of Intelligent Equipment, Henan Polytechnic University, Jiaozuo 454003
3. Jiaozuo Power Supply Company of State Grid Henan Electric Power Company, Jiaozuo 454003

Received:2023-04-14 Revised:2023-05-24 Online:2024-03-25 Published:2024-04-25

摘要/Abstract

摘要：

基于孤岛微电网中虚拟同步发电机一次控制存在的频率偏差问题，提出一种基于预定时系统的分布式二次频率控制策略。该策略通过预定时系统对一致性进行改进并适配虚拟同步发电机本体算法，使各逆变器仅依靠相邻单元的通信，即可实现系统有功缺额按容量分配与频率的无差控制。同时，预定时系统通过提前设定一致性的收敛时间，进一步提高频率的恢复速度，并且无需考虑初始容量与协议参数的影响，有利于分布式电源的即插即用，提高运行效率。最后通过仿真验证了所提控制策略的可行性和有效性。

关键词: 孤岛微电网, 虚拟同步发电机, 一致性算法, 二次频率控制, 频率定时恢复

Abstract:

Based on the frequency deviation problem of primary control of virtual synchronous generators in isolated island microgrid, a distributed secondary frequency control strategy based on predetermined time system is proposed. This strategy improves the consistency of the predetermined system and adapts the virtual synchronous generator ontology algorithm, so that each inverter only relies on the communication of adjacent units, and the active power deficit of the system can be distributed according to capacity and frequency without difference control. At the same time, the system can further improve the speed of frequency recovery by setting the convergence time of consistency in advance, without considering the impact of initial capacity and protocol parameters, which is conducive to the plug and play of distributed power supply and improve the operation efficiency. Finally, the feasibility and effectiveness of the proposed control strategy are verified by simulation.

Key words: Island microgrid, virtual synchronous generator(VSG), consistency algorithm, secondary frequency control, frequency timing recovery

中图分类号:

TM761

李斌, 龚祥祥, 胡丹丹, 曾志辉, 王浩. 孤岛微电网的虚拟同步发电机分布式协同二次调频控制^*[J]. 电气工程学报, 2024, 19(1): 334-343.

LI Bin, GONG Xiangxiang, HU Dandan, ZENG Zhihui, WANG Hao. Distributed Cooperative Secondary Frequency Modulation Control of Virtual Synchronous Generator in Islanded Microgrid[J]. Journal of Electrical Engineering, 2024, 19(1): 334-343.

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参数	数值	参数	数值
R_i/Ω	0.1	U_dc/V	700
L_i/mH	2	U^*/V	311
C_i/μF	150	U	5
f/Hz	50	V	9
k_p	0.01	δ	0.05
Z_line₁/Ω	0.10+j0.002 5	J	1.5
Z_line₂/Ω	0.15+j0.002 8	λ₂	2
Z_line₃/Ω	0.12+j0.003 0	D₁, D₂	15
Z_line₄/Ω	0.18+j0.003 2	D₃, D₄	30
P_n₁, P_n₂/W	1 000	Load1	6 kW+3 kVar
P_n₃, P_n₄/W	2 000	Load2	6 kW+3 kVar

孤岛微电网的虚拟同步发电机分布式协同二次调频控制^*

Distributed Cooperative Secondary Frequency Modulation Control of Virtual Synchronous Generator in Islanded Microgrid

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