Review on key points in the planning for a district-level integrated energy system

doi:10.3969/j.issn.2097-0706.2022.06.002

Abstract

Abstract:

The proposed energy transition strategy has promoted the clean,efficient and economic development of public energy supply systems.District-level integrated energy system（DIES）is an important measure to achieve overall breakthroughs in system dispatch optimization.A typical planning scheme for a DIES with the characteristics of multi-energy flow coupling,multi-regional interconnection and multi-system integration is carried out and analyzed with the goal of breaking regional constraints,energy barriers and industry borders.Then,the mathematical models for the equipment and lines in DIES are divided into three categories,source,network and storage.Since DIES planning scheme under the interconnection and interaction mechanism is a multi-objective multi-factor optimization problem,the key problems in the optimization modeling and model solving of the basic planning model are analyzed and summarized,especially the ones focusing on power dispatch between energy stations and networks.The economic benefits of DIES optimization are assessed according to different evaluation indexes.Finally,based on the deficiency of the current research,the future research direction is prospected.

Key words: district-level integrated energy system, interconnection and interaction mechanism, energy transition, energy internet, cooperation of station and network, modelling of Energy Internet

CLC Number:

TK01

LIU Zifa, TAN Yazhi, LI Jiong, FAN Jingyi, ZHOU Hanze. Review on key points in the planning for a district-level integrated energy system[J]. Integrated Intelligent Energy, 2022, 44(6): 12-24.

Figures/Tables 9

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设备功能	类型	作用
耦合元件	CCHP	实现电-气-热能源的转换,提高对可再生能源的消纳能力,扩大系统的运行区间以及灵活性
	P2G
	燃气轮机
	CHP
	电锅炉
	热泵
储能装置	蓄热罐	能源储存、中转、备用装置,改变负荷的时空分布,实现削峰填谷,提高能源的利用率与系统的调度能力
	储气罐
	热网
	电网
	楼宇
	电池

类型	作用	设备
分布式能源设备	供电	光伏发电
能源转换设备	气-电-热	热电联产机组
	电-热	电锅炉
	电-冷	工业螺杆式制冷机
	热-冷	溴化锂制冷机
能源存储设备	储电	蓄电池
	储热	蓄热槽
	储冷	冰蓄冷

建模方式	优点	缺点
概率	准确描述不确定性	难以获得准确分布
模糊	方法简单,计算量小	结果精度较差
区间	方法简单,计算量小	结果精度较差
机会约束	分析结果更接近实际	置信度设置主观性高
条件风险价值	可衡量尾部风险, 完成保守计算	置信度设置主观性高
多场景	方法简单,将不确定性问题转化为典型场景确定性问题	需要进行场景缩减和最终场景需要高典型性
鲁棒	考虑到最恶劣场景	结果相对保守

一级指标	二级指标	指标单位
经济效益	净现值	万元
	内部收益率	%
	设备运行节约费用	万元
环境效益	CO₂年排放量	t
	NO_x年排放量	t
	清洁能源比例	%
能耗效益	能量梯级利用率	%
	节能率	%
	系统效率	%
	配电网线损率	%
	配电网负载率	%
	系统热损失率	%
	天然气管道容载率	%
	削峰填谷率	%
社会效益	能源质量
	主动削峰负荷用户比例	%
	用户满意度
	区域经济发展贡献率	%
	提供就业岗位率	%