Research on PV power grid connection stability based on decoupled active disturbance rejection control

doi:10.3969/j.issn.1674-1951.2021.08.002

Abstract

Abstract:

To set up modern energy system in the context of carbon neutrality,power grid should consume more renewable energy,for example,solar energy.In order to improve the dynamic frequency support and transient voltage stability of the power grid connection system congregated distributed PV power stations,static synchronous compensators（STATCOM-BESS）have been widely deployed in PV stations due to their fast response.The damping controller with STATCOM-BESS can suppress the power oscillation of the system.In this context,to improve the stability of the grid connection system,STATCOM-BESS with particle swarm optimized active disturbance rejection controller（PSO-ADRC）for PV power stations is studied.Firstly,the ADRC is analyzed.Then,a STATCOM-BESS integrated with dynamic stability strategy is deduced,and a STATCOM-BESS with PSO-ADRC is designed,whose damping effect is verified by a simulation test.

Key words: PV power plant, STATCOM-BESS, particle swarm algorithm, ADRC, energy internet, renewable energy, carbon neutrality

CLC Number:

TK251

LIU Huiqiang, MU Teng, XING Huadong, WU Haiyan, LIU Jianqiang, LEI Ke, GUO Qi. Research on PV power grid connection stability based on decoupled active disturbance rejection control[J]. Huadian Technology, 2021, 43(8): 11-19.

Figures/Tables 17

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Tab.1

Tab.2

Parameters of the STATCOM-BESS

参数	值
额定补偿容量/（kV·A）	200
STATCO开关频率/kHz	6.4
DC/DC开关频率/kHz	10
连接电感/mH	3
电阻/Ω	0.05
直流侧电容/ $μF$	4 700
DC/DC储能电感/mH	2
蓄电池电压/V	20×12

Tab.2

Fig.9

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参数	值
电池方阵数/个	38
直流功率/kW	4 590
交流功率/kW	3 812
逆变器型号	Xantrex PV-150
逆变器数量/台	38
逆变器额定容量/（kV·A）	157
变压器数量/台	12
变压器功率/（kV·A）	500
变换电压/V	480.0/34.5