考虑分布式资源交易的气电综合能源配网系统出清模型

Distribution-level Clearing Model of Gas-Electricity Integrated Energy System Considering Distributed Resource Trading

随着分布式能源设备大量接入配电网并逐步参与分布式交易,配电网运行向着分布式、互动化的方向发展而呈现出更灵活多变的趋势。近年来,综合能源系统快速发展,配网层面电力系统和天然气系统耦合程度日益加深,独立运行模式已无法满足边界匹配要求。文中设计了考虑分布式资源参与的配电网集中交易市场模式,对分布式光伏、分布式储能、电动汽车等建立了交易模型。进而,构建了考虑分布式资源交易的气电综合能源配网系统联合出清模型,采用二阶锥松弛法及泰勒级数展开对配电网潮流约束和配气网潮流约束进行线性化处理,通过配电网节点电价和配气网分时气价反映气电联合系统价格信号。最后,基于改进的气电联合系统对文中所提市场机制模型的有效性进行了验证。

As a large number of distributed energy devices are integrated into the distribution network and gradually participate in distributed tradings,the distribution network operation is developing towards distributed and interactive directions,showing a more flexible and ever-changing trend.In recent years,the stand-alone operation mode can no longer meet the boundary matching requirements because of the rapid development of integrated energy systems and the deepening degree of coupling between the power system and the natural gas system at the distribution network level.This paper designs a centralized trading market mode on the distribution network side that considers the participation of distributed resources,and establishes trading models of distributed photovoltaics,distributed energy storage,electric vehicles,etc.Furthermore,a distribution-level joint clearing model of the gaselectricity integrated energy system considering the distributed resource trading is constructed.The second-order cone relaxation method and the Taylor series expansion are used to linearize the power flow and the gas flow constraints.The price signals of the electricity-gas integrated system are reflected by node prices of distribution network and time-of-use tariffs of gas networks.Finally,the validity of the proposed market mechanism model is verified based on an improved gas-electricity integrated system.