Research on protection of distribution network containing photovoltaic based on “State Grid Chip”
Zhong Yanping1, Shuai Wanlan2, Yu Xiaonong1, Zhang Wenyu1, Deng Tongqiang1
1. State Grid Jiangxi Electric Company Ganzhou Power Supply Company, Ganzhou, Jiangxi 341000; 2. School of Information Engineering, Nanchang University, Nanchang 330031
Abstract：With the continuous development of ubiquitous electric internet of things, more and more photovoltaic households are connected to the distribution network. Traditional AC residual current protection can't trip when direct residual current occurs, bringing great danger to users' safe use of electricity. Basied on “State Grid Chip” AC-DC hybrid residual current and monitoring technology. This paper integrates sensing module such as flexible monitoring and security protection for residual current protection. Corresponding experiments are carried out. The experimental results show that the protection device can accurately identify and interrupt the fault circuit with DC component, improve the operation reliability of distribution network, and verify the correctness and effectiveness of the device. It promotes the comprehensive and in-depth development of the ubiquitous electric internet of things.
2019, Vol. 20 
