电力系统及其自动化学报2017，Vol.29Issue(8)：76-81,6.DOI:10.3969/j.issn.1003-8930.2017.08.012
电动汽车对配电网的无功补偿方法
Reactive Power Compensation Method for Distribution Network from Electric Vehicles
李冬辉 1周大钧 1王伟1
作者信息
- 1. 天津大学电气自动化与信息工程学院,天津 300072
- 折叠
摘要
Abstract
When a large number of electric vehicles(EVs)are connected to the same bus,a lack of reactive power will be caused. Considering the existing problem of traditional compensators as well as the extra cost due to the construction of compensators,a new method is proposed to compensate the reactive power in grid side using the charger during the charging process of EVs. Based on the topology of a modified charger,a dynamic reactive current sampling method is adopted,which can sample the reactive current realtime by using the time delay and triangular functions. Besides,to overcome the difficulty in accurately measuring the inductance value in AC side,which may affect the control accura-cy,a predictive deadbeat control method is developed based on traditional deadbeat control method. Finally,the reac-tive current sampling process is simplified and the allowable error of the inductance value in AC side is expanded , which enhances the robustness of the system. Through simulations and experiments,it is verified that the proposed method can help the EVs compensate the reactive power for themselves as well as for the load resulting from the charg-ing process,and the sine properties of the waveforms of voltage and current in grid side are also in a good state.关键词
电动汽车/充电机/无功功率补偿/无功电流动态采样/预测型无差拍控制Key words
electric vehicle/charger/reactive power compensation/dynamic reactive current sampling/predictive deadbeat control分类
信息技术与安全科学引用本文复制引用
李冬辉,周大钧,王伟..电动汽车对配电网的无功补偿方法[J].电力系统及其自动化学报,2017,29(8):76-81,6.
