Wind-Thermal-CSP Bundling Model With an Adjustable Heat Storage Strategy for CSP Stations

The installed capacity of renewable energy has continued to increase in recent years, causing excess power to be transmitted to neighboring provinces by DC transmission with wind and thermal power bundling. However, with increasing coal cost and decreasing investment benefit of thermal power, the economic benefit of thermal power investment has decreased. Therefore, this paper proposes a method that replaces the thermal power unit with renewable energy to assume the peak regulating function of the power system. First, a novel heat storage strategy for concentrating solar power (CSP) stations is established. On this basis, the CSP station is included in the wind-thermal bundling model to replace the peak regulating function of some thermal power units, and the planning method of wind-thermal-CSP bundling with an adjustable heat storage strategy is developed. By adjusting the heat storage strategy and comparing the economic parameters under the different strategies, the optimal ratio of the installation of different powers is obtained.