Voltage/var Control Strategy of PV Plant Based on Adaptive Adjustment of Active Power

被引：0
|
作者：
Yu Z. [1 ]
Tang Y. [1 ]
Dai J. [1 ]
Yi J. [2 ]
机构：
[1] School of Electrical Engineering, Southeast University, Nanjing, 210096, Jiangsu Province
[2] China Electric Power Research Institute, Haidian District, Beijing
来源：
Tang, Yi (tangyi@seu.edu.cn) | 1900年 / Power System Technology Press卷 / 44期
关键词：
Adaptive adjustment of active power; Variable droop control for reactive power; Voltage violation; Voltage/var control;
D O I：
10.13335/j.1000-3673.pst.2018.2647
中图分类号：
学科分类号：
摘要：
The reactive power and voltage control of photovoltaic inverters achieves good results in solving the voltage violation problems of grid-connected photovoltaic power generation system. However, in order to ensure renewable energy accommodation, relevant researches mainly focus on simple voltage/var control, which cannot meet the requirements of safe and stable operation for power grid when a large reactive power vacancy occurs. Therefore, based on the relationship between reactive power and active power of PV inverter, this paper proposes a voltage/var control strategy of PV inverter based on adaptive adjustment of active power. Normally, PV inverter operates in maximum power point tracking (MPPT) control mode. Variable droop control for reactive power is adopted to provide corresponding reactive power when voltage at grid-connection point is beyond limit, during which the difference of reactive power and voltage capabilities for PV cluster is taken into consideration. When the reactive power capacity of PV inverter is insufficient, the active power output of PV is adjusted adaptively to meet the reactive power demand of the system. The PV inverter operates as static synchronous compensator (STATCOM) at night or when the problem of reactive power vacancy is severe. The results of simulation carried out on PSCAD/EMTDC demonstrate validity of the proposed control strategy. © 2020, Power System Technology Press. All right reserved.
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页码：1900 / 1907
页数：7
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