热网特性对弃风消纳效果的影响研究

Heat load can be shifted by heat storage, meanwhile, wind power curtailment can be reduced by decoupling "power-heat production" constraint of CHP(Combined Heat and Power) units through peak heat load shifting. The impact of heat storage, attenuation and delay characteristics of heat network on wind power curtailment is investigated. The abandoned wind absorption mechanism of pipe network heat storage is analyzed without considering attenuation and delay characteristics, and the impact of the attenuation and delay characteristics on the abandoned wind absorption effect of pipe network heat storage is analyzed. The heat storage model of pipe network is established, and the operation model of CHP system that considers heat storage, attenuation and delay characteristics of heat network is developed. Simulative results show that the abandoned wind power can be absorbed by combining the pipe network heat storage with electric boilers. In addition, the device cost is saved by replacing the heat storage device of electric boilers with heat sto-rage device. The attenuation characteristic results in the increase of both heating loss and heat source production, and the decrease of heat storage of pipe network, which is not conducive to the absorption of abandoned wind power. The delay characteristic results in different peak time of heat production of CHP units and wind power production, which contributes to accommodating more abandoned wind power. However, it has no effect on the heat storage amount of pipe network and the abandoned wind absorption of pipe network heat storage.