Analysis of Wayside Energy Storage System in DC Traction Power Supply System

In this paper, a general computation model of wayside energy storage device is built, which can be solved in DC traction power supply system by a new algorithm based on Bang-Bang control and multi-state switch strategy. Four indexes are proposed to evaluate the energy saving and voltage stabilizing effect of energy storage system, which can guide the parameter selection. Cases based on a certain metro line in Guangzhou are studied to verified the accuracy and convergency of the algorithm, which also indicated the energy saving and voltage stabilizing effect of wayside energy storage system. The relationships among threshold voltage, capacity and peak power are discussed, which can help design the parameters of wayside energy storage system.