基于旋转坐标变换的孤岛微网群广义下垂控制策略

doi:10.11985/2020.01.003

电气工程学报 ›› 2020, Vol. 15 ›› Issue (1): 23-28.doi: 10.11985/2020.01.003

所属专题：特邀专栏：微电网功率变换与稳定控制

• 特邀专栏: 微电网功率变换与稳定控制 • 上一篇下一篇

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基于旋转坐标变换的孤岛微网群广义下垂控制策略

张芮漩,周念成,孟潇潇

重庆大学输配电装备及系统安全与新技术国家重点实验室重庆 400044

收稿日期:2020-01-03 出版日期:2020-03-25 发布日期:2020-05-13
作者简介:张芮漩,女,1997年生,硕士研究生。主要研究方向为电力系统运行与控制。E-mail：xx_zrx88@cqu.edu.cn|周念成,男,1969年生,博士研究生导师,教授。主要研究方向为电力系统保护和电能质量等方面。E-mail：cee_nczhou@cqu.edu.cn|孟潇潇,男,1992年生,博士研究生。主要研究方向为电力系统运行与控制、微电网控制技术。E-mail：mxxfreedom@cqu.edu.cn

Generalized Sag Control Strategy for Isolated Island Microgrid Clusters Based on Rotation Coordinate Transformation

ZHANG Ruixuan,ZHOU Niancheng,MENG Xiaoxiao

State Key Laboratory of Power Transmission Equipment & System Security and New Technology, Chongqing University, Chongqing 400044 China

Received:2020-01-03 Online:2020-03-25 Published:2020-05-13

摘要/Abstract

摘要：

微网群由多个电源和负荷集群构成,其控制设计较为复杂,分析孤岛微网群之间的联络线阻抗对两者交互功率控制的影响。考虑到微网群直接使用广义下垂控制策略不可行的问题,通过利用微网群结构简化及联络线阻抗约束,提出了一种微网群结构变换下的改进广义下垂控制策略。该策略基于坐标旋转理论,在任意的线路阻抗比之下,能够实现功率解耦控制、频率无差调节和有功功率均分,进而保证微网群运行的稳定性并提升系统动态响应。最后对提出的控制策略进行仿真分析,仿真结果证明所提控制策略具有可行性。

关键词: 微网群, 下垂控制, 广义下垂控制, 有功均分

Abstract:

The microgrid clusters is composed of multiple power supply and load clusters, and its control design is complicated. The influence of tie line impedance between isolated island microgrid clusters on their interactive power control is analyzed. In view of the infeasibility of using generalized droop control strategy directly for microgrid clusters, an improved generalized droop control strategy based on microgrid clusters structure transformation is proposed in consideration of simplified microgrid clusters structure and tie line impedance constraint. Based on the coordinate rotation theory, this strategy can realize power decoupling control, frequency adjustment and active power equalization under arbitrary line impedance ratio, thus ensuring the stability of the operation of the microgrid clusters and improving the dynamic response of the system. Finally, the proposed control strategy is simulated and analyzed, and the simulation results prove the feasibility of the proposed control strategy.

Key words: Microgrid clusters, droop control, generalized droop control, active divide

中图分类号:

TM71

张芮漩,周念成,孟潇潇. 基于旋转坐标变换的孤岛微网群广义下垂控制策略[J]. 电气工程学报, 2020, 15(1): 23-28.

ZHANG Ruixuan,ZHOU Niancheng,MENG Xiaoxiao. Generalized Sag Control Strategy for Isolated Island Microgrid Clusters Based on Rotation Coordinate Transformation[J]. Journal of Electrical Engineering, 2020, 15(1): 23-28.

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参数		数值
LC滤波器电感L_f_1,1-L_f_3,3/H		2×10^-3
LC滤波器电阻R_f_1,1-R_f_3,3/Ω		0.03
分布式电源线路电阻R_c_1,1-R_c_3,3/Ω		0.03
分布式电源线路电感L_c_1,1-L_c_3,3/H		2×10^-3
DG_1-1、DG_1-2有功下垂系数k_p_1-1,k_p_1-2/(rad/W)		11.5×10^-5
DG_1-1、DG_1-2无功下垂系数k_q_1-1,k_q_1-2(rad/W)		0.45×10^-3
DG_3-1、DG_3-2有功下垂系数k_p_3-1,k_p_3-2/(rad/W)		12.5×10^-5
DG_3-1、DG_3-2无功下垂系数k_q_3-1,k_q_3-2/(rad/W)		0.5×10^-3
DG_2-1、DG_2-2、DG_2-3有功下垂系数 k_p_2-1,k_p_2-2,k_p_2-3/(rad/W)		12×10^-5
DG_2-1、DG_2-2、DG_2-3无功下垂系数k_q_2-1,k_q_2-2,k_q_2-3/(rad/W)		0.5×10^-3
微网联络线路阻抗Z_line₁₂	R₁₂/Ω X₁₂/H	0.053 67 1.124 12
微网联络线路阻抗Z_line₂₃	R₂₃/Ω X₂₃/H	0.053 67 1.124 12
微网联络线路阻抗Z_line₃₁	R₃₁/Ω X₃₁/H	0.035 68 0.747 32

基于旋转坐标变换的孤岛微网群广义下垂控制策略

Generalized Sag Control Strategy for Isolated Island Microgrid Clusters Based on Rotation Coordinate Transformation

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