弃风参与电网调频的电转气-储气-燃气轮机容量优化配置

电转气(P2G)技术为消纳可再生能源提供了新的途径,然而,投资成本高、经济性较差的问题限制了P2G技术的应用与发展。为实现弃风资源的消纳与P2G经济性的提升,首先提出通过P2G技术用弃风生产天然气,经储气罐存储并通过燃气机组(NGGU)发电参与调频的运行场景,并提出了各装置的协调运行策略。其次,根据上述运行策略,构建了P2G、储气罐、NGGU参与调频过程的成本–收益模型,以最大化净收益为目标实现各装置的容量优化配置。最后,以某风电场实际弃风、某自动发电控制(AGC)机组实际下发指令为参考,利用粒子群优化算法进行规划计算。结果分析了利用风电场弃风与P2G技术在P2G、储气与NGGU容量优化配置下参与电力市场调频辅助服务经济性与可行性。

Optimal Capacity Configuration of Power-to-Gas, Gas Tank and Natural Gas Generation Unit with Participation of Curtailed Wind Power in Frequency Regulation of Power Grid

Power-to-gas (P2G) technology provides a new way for the renewable energy accommodation. However, the application and development of P2G technology are limited by the problems of high investment cost and poor economic characteristics. In order to realize the accommodation of curtailed wind power and improve the economy of P2G, the paper firstly proposes to use curtailed wind power to produce natural gas through P2G technology. Natural gas is stored in gas storage tank, and participates in the operation scene of frequency regulation through the nature gas generation unit (NGGU).The coordinated operation strategy of each equipment is proposed. Secondly, according to the above operation strategies, the cost-benefit model of P2G, gas storage tank and NGGU participating in the frequency regulation process is constructed with the goal of maximizing the income, in order to achieve the optimal capacity configuration of each equipment. Finally, the actual curtailed wind power of a certain wind farm and the actual dispatching commands of an automatic generation control (AGC) unit are used as a reference, and the particle swarm optimization algorithm is used for planning calculation. The calculation results analyze the economy and feasibility by using curtailed wind power and P2G technology to participate in frequency regulation auxiliary service of the electricity market with the optimal configuration of P2G, gas storage tank and NGGU capacity.