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Title: Single-phase active electric-power filter using analog cascade connection controller
Other Title: 使用模拟级联控制器的单相有源电力滤波器
Authors: Tsang, KM 
Chan, WL 
Issue Date: 23-Jan-2008
Source: 中国专利 ZL 200510082286.3
Abstract: The single-phase active electric power filter of using analog cascaded controller includes control circuit, and connected main circuit. The control circuit includes first and second proportional plus integral controllers, multiplier, subtracter, feedforward controller, and adder. Principle of the invention is as following: using voltage loop composed of these analog parts adjusts DC voltage of bus in two control loops including external current loop as well as generates current of reference power supply; using current loop reduces interference effect, and tracks current of reference filter; finally, generating command signal for main circuit to generate compensating current. Using analog devices in low cost without need of microprocessor, the invention realizes active electric power filter capable of restraining harmonic, and correcting power factor. The invention reduces cost of the filter, and has no mathematic burden for calculating fundamental wave and harmonic of load current.
Publisher: 中华人民共和国国家知识产权局
Rights: 专利权人: The Hong Kong Polytechnic University.
Appears in Collections:Patent

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