The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Nov. 01, 2016
Filed:
Dec. 24, 2013
State Grid Corporation of China, Beijing, CN;
Xuancheng Power Supply Company of State Grid Anhui Electric Power Corporation, Anhui, CN;
Beijing Hua Teng Kai Yuan Electric Company Limited, Beijing, CN;
Yeru Zhou, Anhui, CN;
Jian Wang, Anhui, CN;
Dongsheng Fu, Anhui, CN;
Xiaoma Jin, Anhui, CN;
Dongsheng Zou, Anhui, CN;
Jin Pan, Anhui, CN;
Yi Song, Anhui, CN;
Jianzhou Cheng, Anhui, CN;
Tianwen Zheng, Anhui, CN;
Jianming Wu, Anhui, CN;
Hongbo Luo, Anhui, CN;
State Grid Corporation of China, Beijing, CN;
Xuancheng Power Supply Company of State Grid Anhui Electric Power Corporation, Xuancheng, CN;
Beijing Hua Teng Kai Yuan Electric Company Limited, Beijing, CN;
Abstract
The present invention discloses a system and a method for controlling PCS voltage and frequency, wherein the system comprises a reference voltage converter, a phase-locked loop, a grid-side voltage converter, a voltage transformer, a first proportional integral controller, a second proportional integral controller, a coordinate converter and a SVPWM generator; a reference voltage converter is connected to an output terminal of a the phase-locked loop, and the output terminal of the phase-locked loop is further connected to a grid-side voltage converter; the grid-side voltage converter is connected to a high-voltage side of an isolating transformer of the electric grid via the voltage transformer; two output terminals of the grid-side voltage converter are respectively connected to the coordinate converter via two proportional integral controllers; an output terminal of the coordinate converter is connected to the SVPWM generator; an output terminal of the SVPWM generator is connected to a power switch of the electric grid. A PWM control signal for controlling the power switch of the electric grid is generated by the reference voltage converter, the phase-locked loop, the grid-side voltage converter, the voltage transformer, the two proportional integral controllers, the coordinate converter and the SVPWM generator. The system and method for controlling PCS voltage and frequency according to the invention have the advantages that the PCS can realize voltage and frequency buildup in an off-grid state and can stably output an expected voltage and frequency.