The conventional flexible retrofit plan for coal motor sets is difficult to eliminate the potential life loss and equipment safety risks caused by frequent and rapid load changes to the thermal system. In order to improve the long-term safety and economy of coal-fired power units participating in deep peak shaving

a “healthy peak shaving” technical route for coal-fired power units based on hydrogen energy storage system is proposed

with a domestic ultra supercritical secondary reheat 1 000 MW coal-fired unit as the application object. The indirect carbon emission reduction significance of peak shaving coal-fired power hydrogen production is demonstrated.On this basis

the matching degree between different hydrogen production processes and the production conditions of coal-fired power plants were analyzed. It was believed that solid oxide electrolysis cell(SOEC) hydrogen production was the comprehensive optimal plan. Based on this

a principle design scheme for SOEC coupled coal-fired power peak shaving was proposed. Finally

a financial analysis was conducted on the new plan using the annual load curve. The calculation results indicate that

the SOEC assisted deep peak shaving of coal-fired power can increase the annual revenue of the example unit by 236 million yuan

and obtain other benefits such as equipment lifespan extension

consumption reduction

and carbon reduction. The relevant conclusions have reference significance for guiding the healthy and safe operation of peak shaving coal-fired power units.