Li Zhengxi

Research on Site Selection and Protection Configuration of Distributed Power Supply in Microgrid System

Distributed generation provides a new opportunity for modern power supply, and also challenges the safe operation of the existing power system. This paper studied on site selection and protection configuration of distributed power supply in microgrid system, mainly including the objective function and constraint conditions of distributed power source siting in microgrid system, the revision of distributed power source location objective function and the protection configuration principles and methods of microgrid and system access point. The results can provide technical support for planning and protection configuration of microgrid access system, and ensure the orderly development of microgrid planning and construction.

Analysis of the Influence of Distributed Generation Access on the Operation and Management of Distribution Network

Distributed generation provides a new opportunity for modern power supply, but it also impacts on the operation and management of distribution network. Distributed power connected to the distribution network has changed the mode of operation of the distribution network from the original radiation type to a multiple power supplies network. The power flow direction of the traditional distribution network is from transformer substation to load. The access on Distributed power makes the power flow direction no longer only from power resource to the user side and increases the complexity and uncertainty of the distribution system, and it will bring about great influence on power grid planning, relay protection, power quality, scheduling management, the operation of the power grid and security of distribution network.