基于CLH-SOFC气转电技术的热电解耦IES优化调度

Optimal Scheduling of Thermoelectric Decoupling IES Based on CLH-SOFC Gas-to-power Technology

针对热电联产机组热电比恒定导致其出力水平较低,以及电力负荷波动对上游电网产生的影响,本文提出一种基于化学链制氢与固体燃料电池相结合的气转电技术的热电解耦综合能源系统优化调度模型。首先在传统热电联产机组中加入有机朗肯循环余热发电装置,在电力负荷需求高峰时段将部分余热转化为电能,提高燃气轮机出力,同时加入化学链制氢与固体燃料电池相结合的集成系统增强电-气耦合,进一步起到平抑电负荷波动,达到削峰填谷的目的。根据算例分析,在3种场景下进行对比,结果表明,本文提出的热电解耦模型在提高系统运行经济性、减少负荷波动对上游电网影响等方面具有优越性,并进一步提高了能源利用效率。

In view of the low output from a combined heat and power(CHP)unit due to its constant heat-to-power ratio and the impact of power load fluctuations on the upstream power grid,a thermoelectric decoupling integrated energy system(IES)optimal scheduling model based on the chemical looping hydrogen generation-solid oxide fuel cell(CLHSOFC)gas-to-power technology is proposed in this paper. First,an organic Rankine cycle(ORC)waste heat power generation device is added to the traditional CHP unit to convert part of the waste heat into electrical energy during the peak period of power load demand,thus increasing the output from the gas turbine. At the same time,a CLH-SOFC integrated system is introduced to enhance the power-gas coupling and further stabilize the power load fluctuations,thus achieving the purpose of peak shaving and valley filling. According to the analysis and comparison of an example under three scenarios,it is verified that the proposed thermoelectric decoupling model is superior in optimizing the operating economy of the system and reducing the impact of load fluctuations on the upstream power grid. In addition,it also improves the energy utilization efficiency.