| 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。 |
| 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 |
| DOI： |
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| 基金项目: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） |
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| π-shaped voltage regulator with controllable phase and amplitude |
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ZHANG Youjun
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College of Mechanical & Electrical Engineering，Soochow University，Suzhou 215021，China
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| Abstract: |
| 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-phase π-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 Buck-type 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 proposed π-shaped VRCPA. |
| Key words: voltage regulator voltage regulator with controllable phase and amplitude phase regulation impedance compensation control parameter |
