Strategy to Increase Hosting Capacity of Renewable Energy in Stand-Alone Microgrid based on Droop Control of ESS

Abstract

The paper presents a strategy to increase hosting capacity of renewable energy in microgrid based on droop control of energy storage system (ESS). Unlike general power grid, microgrid has small system inertia. Therefore, the system transient stability becomes low even for a small disturbance. The paper discusses the weakness of the microgrid and then presents the strategy to solve the problem with droop control of ESS. The performance of the proposed method is verified by time domain simulation from applying to physical microgrid model in South Korea.

The paper presents a strategy to increase hosting capacity of renewable energy in microgrid based on droop control of energy storage system (ESS). Unlike general power grid, microgrid has small system inertia. Therefore, the system transient stability becomes low even for a small disturbance. The paper discusses the weakness of the microgrid and then presents the strategy to solve the problem with droop control of ESS. The performance of the proposed method is verified by time domain simulation from applying to physical microgrid model in South Korea.