摘要
在级联式相位和幅值可控电压调节器(VRCPA)的基础上,提出了一种π型VRCPA,用于电能传输控制。相对于输入电压,其输出电压的相位和幅值均可进行连续调节。所提π型单相VRCPA由Buck交流单元、3次谐波陷阱和Boost交流单元组成,与级联式单相VRCPA相比,省却了前级Buck交流变换器的LC输出滤波器,简化了电路结构,但采用相同的两级占空比调制,即前级Buck交流单元用于调节输出电压的相位,后级Boost交流单元用于调节输出电压的幅值。在π型单相VRCPA中采用电容进行阻抗补偿,能够有效地抵消或减小3次谐波陷阱与线路阻抗对基波电压的滞后作用。π型三相VRCPA由3个Buck交流单元和1个三相Boost交流变换器组成,无需3次谐波陷阱,且省却了前级3个LC输出滤波器,电路结构简洁。实验结果证明了π型VRCPA的可行性。
Based on the cascaded VRCPA（Voltage Regulator with Controllable Phase and Amplitude）,a kind of π-shaped VRCPA is proposed for the power transmission control. Relative to its input voltage,the phase and amplitude of its output voltage can be continuously regulated. The proposed single-phase π-shaped VRCPA is composed of a Buck-type AC unit,a 3rd-order harmonic trap and a Boost-type AC unit. Compared with the single-phase cascaded VRCPA,it omits the LC output filter of Buck-type AC unit to simplify its circuit structure,but adopts the same two-stage duty-cycle modulation,i.e. the Buck-type AC unit regulates phase and the Boost-type AC unit regulates amplitude. With the impedance compensation,the single-phaseπ-shaped VRCPA effectively counteracts or reduces the effect of 3rd-order harmonic trap and line impedance on the lag of fundamental voltage. The three-phase π-shaped VRCPA is composed of three Bucktype AC units and a three-phase Boost-type AC converter. Without three LC output filters and the 3rd-order harmonic trap,its circuit structure becomes simple. Experimental results verify the feasibility of the proposedπ-shaped VRCPA.
出处
《电力自动化设备》
EI
CSCD
北大核心
2016年第4期32-39,共8页
Electric Power Automation Equipment
基金
国家自然科学基金资助项目(51477107)
中国博士后科研基金资助项目(2015M571805)
江苏省博士后科研基金资助项目(1402107C)
江苏省光谱成像与智能感知重点实验室开放基金资助项目(3092014012200416)~~
关键词
电压调节器
相位和幅值可控电压调节器
相位调节
阻抗补偿
控制参数
voltage regulator
voltage regulator with controllable phase and amplitude
phase regulation
impedance compensation
control parameter
