浙江电力

2015, v.34;No.231(07) 10-15

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一种新型Boost变换器前馈控制策略
A Novel Feed-forward Voltage Control Strategy of the Boost Converter

王海波,许路广,朱胜辉,杨秀,桂谊,夏晗
WANG Haibo,XU Luguang,ZHU Shenghui,YANG Xiu,GUI Yi,XIA Han

摘要(Abstract):

在通过直流母线汇流的独立光伏发电系统中,维持直流母线电压恒定是保证系统的高效运行、较高的电能质量以及延长蓄电池的使用寿命的重要手段。提出一种在光伏MPPT Boost变换器后通过再一级Boost变换器与直流母线连接的网络结构,并采用新型的前馈控制策略实现对直流母线电压的稳定控制。该控制方法为,在原有的电流内环电压外环双环控制基础上引入负荷电流与输入电压的前馈环节,削除因二者的变动引起的直流母线电压波动,提高了系统的动态稳压性能。仿真比较了双环控制与本文所提控制在负荷电流与输入电压跃变情况下的直流母线电压,验证了所提控制策略的有效性。
In the stand-alone photovoltaic system with DC(direct current) bus-bar, stabilizing the DC bus voltage is an important method to guarantee the efficient operation of the system, high power quality and long life of the battery. A novel topology that the MPPT of PV(maximum power point tracking of photovoltaic) boost converter and the DC bus are connected by another boost converter is proposed. Moreover, a new feed-forward control strategy is applied to the boost converter to stabilize the DC bus voltage: based on the voltage outer loop and current inner loop control, the input voltage and load current feed-forward loops are introduced to eliminate the fluctuation of DC bus voltage due to the change of the two factors mentioned above to improve the voltage-stabilizing performance of the system. The simulation compares DC bus voltage of double-loop control and the control mentioned in this paper in case of voltage leap and verifies effectiveness of the abovementioned control strategy.

关键词(KeyWords): 独立光伏系统;Boost变换器;稳压控制;前馈控制
stand-alone photovoltaic system;Boost converter;voltage stabilizing;feed-forward control

Abstract:

Keywords:

基金项目(Foundation): 国家863高技术基金项目(2011AA05A106)

作者(Author): 王海波,许路广,朱胜辉,杨秀,桂谊,夏晗
WANG Haibo,XU Luguang,ZHU Shenghui,YANG Xiu,GUI Yi,XIA Han

DOI: 10.19585/j.zjdl.2015.07.003

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