考虑风电与能源转换和存储设备联营的电力和天然气市场均衡分析

Equilibrium analysis of coupled electricity and gas markets considering joint operation of wind power with energy conversion and storage equipment

风电出力较大的不确定性会导致参与市场竞争时的投标偏差问题,多能交易市场中的多能互补有助于降低风电投标偏差。首先,提出了风电商与电转气设备、燃气机组及储气装置分别以合作联营和租用联营模式参与投标竞争的电力和天然气市场交易框架。其中,两种联营模式均可完全弥补风电商在电力市场中的投标偏差,而且电转气设备、燃气机组和储气装置除了弥补风电投标偏差,还能利用不同能源市场价格差异参与套利交易。其次,为了研究比较不同联营模式对电-气市场均衡结果的影响,分别建立不同联营模式下的电力-天然气市场多时段古诺随机均衡模型。其中利用Shapley值法对合作联营模式下的风电商、电转气设备、燃气机组及储气装置进行利润分配。最后,通过算例仿真表明,所提出的两种联营模式有助于提高风电商的市场竞争力,缓解电力和天然气市场的价格波动,促进两个市场的高效平稳运行。

The high uncertainty of wind power output will lead to the problem of bid deviations when wind power producers(WPPs)participate in market competition.Multi-energy complementarity in the multi-energy trading market is helpful in tackling WPP bid deviations.First,multi-energy market trading frameworks are proposed for two joint operational modes(namely cooperative joint operation and lease joint operation)of WPP,power-to-gas(P2G)equipment,natural gas generating unit(NGGU)and gas storage device(GSD).These two modes can fully compensate for the WPP bid deviations in the electricity market.In addition,the P2G equipment,NGGU and GSD can be used not only for compensating WPP bid deviations,but also for arbitrage between the electricity and gas markets.Second,in order to study and compare the influence of different joint operational modes on the equilibrium outcomes of the multi-energy market,multi-period Cournot equilibrium models are established for the electricity and gas markets under different joint operational modes.The Shapley value method is applied to allocate the profits among WPP,P2G,NGGU and GSD for the cooperative joint operation mode.Finally,numerical simulation shows that the two proposed joint operational modes are helpful in improving market competitiveness of WPP,mitigate price fluctuations in both the electricity and gas markets,and promote the efficient and stable operation of the two markets.