考虑下游氢负荷的氢-电耦合配电网容量规划

Capacity planning of hydrogen-electricity coupling distribution network considering downstream hydrogen load

针对大规模光伏并网下配电网灵活性不足以及当前市场环境下氢能交易价格过高的问题,提出一种考虑下游氢负荷的氢-电耦合配电网协同规划模型。计及氢能设备的运行特性,构建包含电制氢、燃料电池、储氢罐和电储能的氢-电耦合配电网运行模型,并进一步基于光伏出力和负荷的波动性确定配电网的灵活性供需情况;对不同领域的用氢负荷进行建模,以系统总体投资和运行成本最小为优化目标,在满足所有设备投资和运行约束的前提下,构建考虑氢负荷需求的氢-电耦合配电网规划模型;以IEEE 33节点配电网为算例进行测试,结果表明氢-电耦合能够有效提升配电网的经济性(综合成本降低了3.8%)和灵活性(上调、下调灵活性分别提升了34.7%、37.6%),并大幅削减下游用氢负荷的购氢成本。

Aiming at the problems of insufficient flexibility of distribution network with large-scale photovoltaic integration and high trading price of hydrogen energy in the current market environment,a collaborative planning model of hydrogen-electricity coupling distribution network considering downstream hydrogen load is proposed.Considering the operation characteristics of hydrogen energy equipment,the operation model of hydrogen-electricity coupling distribution network including electrolysis,fuel cell,hydrogen storage tank and electricity energy storage is constructed,and the flexible supply and demand situation of distribution network is further determined based on the fluctuations of photovoltaic output and load.The hydrogen load in different fields is modeled,and with the objective of minimizing the total system investment and operation costs,a planning model of the hydrogen-electricity coupling distribution network is developed,considering hydrogen load demand while satisfying the investment and operation constraints of all equipment.Ta-king IEEE 33-bus distribution network as an example,the test results show that,hydrogen-electricity coupling can effectively improve the economy(comprehensive cost reduced by 3.8 %) and flexibility(upward and downward flexibility increased by 34.7 % and 37.6 % respectively) of the distribution network and significantly reduce the hydrogen purchase cost of downstream hydrogen load.