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:
Aug. 17, 2021
Filed:
Feb. 27, 2019
State Grid Zhejiang Electric Power Co., Ltd. Taizhou Power Supply Company, Zhejiang, CN;
State Grid Corporation of China, Beijing, CN;
Xiaoping Fu, Zhejiang, CN;
Wenqi He, Zhejiang, CN;
Chi Zhang, Zhejiang, CN;
Dongbo Zhang, Zhejiang, CN;
Daojian Hong, Zhejiang, CN;
Yuande Zheng, Zhejiang, CN;
Minzhi Chen, Zhejiang, CN;
Mingxu Chen, Zhejiang, CN;
Zhen Huang, Zhejiang, CN;
Guode Ying, Zhejiang, CN;
State Grid Zhejiang Electric Power Co., Ltd. Taizhou Power Supply Company, Taizhou, CN;
State Grid Corporation of China, Beijing, CN;
Abstract
Provided is an anti-islanding protection system. The system is applied to a low-voltage distributed generation resource (DGR) and includes a box, a reverse power protector, a protection module and an output controller. The reverse power protector has an end connected to a first current transformer and has another end connected to the output controller. The reverse power protector is configured to provide reverse power protection for the low-voltage DGR. The output controller has an end connected to the protection module and the reverse power protector and has another end connected to a grid-connection switch of the low-voltage DGR. The output controller is configured to control the grid-connection switch to turn off when reserve power is detected. The protection module has an end connected to a second current transformer and has another end connected to the output controller. The protection module is configured to provide low-frequency protection, over-frequency protection, over-voltage protection and low-voltage protection for the low-voltage DGR.