基于一致性算法的微网无功控制及延时算法优化

doi:10.16180/j.cnki.issn1007-7820.2020.09.007

Abstract

Abstract:

In view of at the problems of reactive power distribution and communication delay in isolated island microgrid, a hierarchical control algorithm based on consistency algorithm is proposed in this paper. Each distributed power supply exchangs voltage information with the neighboring distributed generation supply under the clock cycle, and obtains the average voltage value of the whole network through the local voltage consistency algorithm, which updates the voltage state value with the iteration cycle, and realizes the accurate distribution of reactive power of each distributed generation supply. In the voltage consistency algorithm, the communication delay between local nodes and adjacent nodes is saved. The maximum communication delay time between adjacent nodes can be obtained by the topology structure of the micro-grid system, and the delay error is dynamically compensated by the PI algorithm. The island microgrid simulation model is established on MATLAB/Simulink platform, and the experimental results verifies the effectiveness of the control strategy.

Key words: microgrid, hierarchical control, consistency algorithm, average network voltage, reactive power, communication delay

CLC Number:

ZHU Yanxiang,LONG Yingwen. Reactive Power Control and Delay Algorithm in Microgrid Based on Consistency Algorithm[J].Electronic Science and Technology, 2020, 33(9): 38-43.

Figures/Tables 8

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References 16

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参数	值
孤岛电压参考值U_n/V	380
额定频率f/Hz	50
无功下垂系数k_q/var·(rd)^-1	0.002
无功积分系数k_i/var·(rd)^-1	0.300
电压比例系数k_p/var·V^-1	0.050
电压积分系数k_i/var·V^-1	0.600
DG₁线路阻抗R/Ω	1.2+j2.4
DG₂线路阻抗R/Ω	1+j2
DG₃线路阻抗R/Ω	0.8+ j1.6
DG₄线路阻抗R/Ω	0.5+j1
DG₅线路阻抗R/Ω	0.2+j0.4
负载R/Ω	10- j3.98

Reactive Power Control and Delay Algorithm in Microgrid Based on Consistency Algorithm

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