State Grid Corporation of China

North China Electric Power University

State Grid Liaoning Electric Power Company Limited Economic Research Institute

Dalong Hu

Yan Liu

Yingwei Song

Ming Meng

Xiping Wang

Liaoyi Ning

Li Jiang

Jian Liu

A renewable energy-based hybrid bi-directionally interactive DC traction power supply system includes two traction substations. Each substation includes transformers, rectifiers, bidirectional AC-DC converters, a DC bus, a catenary, a steel rail and a section post. A DC bus between two adjacent traction substations is provided with a DC renewable energy system constructed by an electric vehicle charging-discharging system, a distributed generation and more than one low voltage DC microgrid. The DC renewable energy system is connected to the DC bus between two adjacent traction substations through a high voltage DC bus, thus a DC circular microgrid being formed in a power supply section post. The electric vehicle charging-discharging system is formed by more than one bidirectional DC-DC charging-discharging equipments which are intended for in connection with the power batteries of the electric vehicle. The renewable energy-based hybrid bi-directionally interactive DC traction power supply system of the invention realizes effective usage of distributed generation and recycling of electric locomotive braking energy, reducing DC voltage fluctuation, thus improving reliability of the DC traction power supply system.

Renewable energy-based hybrid bi-directionally interactive DC traction power supply system

Growing community of inventors

Shenyang, China

Dalong Hu