Author(s)

Wenxian Zhu

Corresponding Author

Wenxian Zhu

ABSTRACT

This study focuses on the safety evaluation and optimal dispatching strategy of the coupled system of generating light, wind and electricity storage (hereinafter referred to as "coupled system"). As a new energy system, the coupling system integrates biomass energy, light energy, wind energy, energy storage, electric energy, thermal energy and natural gas, aiming at improving the flexibility, reliability and economy of the energy system. Firstly, a safety assessment index system including system stability, reliability and vulnerability is constructed, and a quasi-dynamic safety assessment method combined with a quantitative risk assessment model is used to monitor key parameters in real time and predict the future trend of the system. Then, a multi-objective optimal scheduling strategy is proposed in this study, aiming at achieving efficient use of energy, minimum cost and environmental friendliness. This strategy comprehensively considers the interaction and coupling relationship of power, natural gas, heat and other subsystems, and uses genetic algorithm to solve the optimal scheduling model. The case analysis shows that by optimizing the scheduling scheme, the system operation cost is reduced by 15.6%, and the pollutant emissions are significantly reduced, including CO2 emissions by 20%, NOx by 25%, SOx by 15% and PM emissions by 30%. This study provides a scientific basis for the design and operation of the coupling system, ensures the safe and reliable operation of the system under various working conditions, and promotes the sustainable development of energy.

KEYWORDS

safety evaluation; optimal dispatching strategy; thermal-gas coupling system; photovoltaic wind power storage