考虑网损的电力系统节点边际碳势理论研究与建模
Research and Modelling of Bus Marginal Carbon Intensity for Power Systems Considering Network Losses
吴静 1刘轩宇 2李响 1齐笑言 1李成俊 1张忠2
作者信息
- 1. 国网辽宁省电力有限公司电力科学研究院,辽宁沈阳 110006
- 2. 大连理工大学电气工程学院,辽宁大连 116024
- 折叠
摘要
用于电力系统碳排放计算的宏观核算法和碳流分析法未考虑网损、阻塞因素对电网边际碳排放的影响.为实现电网碳排放指标的精细化分析,建立考虑网损的电力系统节点边际碳势分析模型.考虑火电机组煤耗特性建立了机组的边际碳势模型;基于交流潮流模型,建立电网网损灵敏度模型;进而提出电力系统节点边际碳势的计算方法,并考虑网络阻塞因素进一步改进了该方法.采用IEEE 14节点系统和某500 kV实际系统算例验证了所建模型的合理性和适用性,分别分析了低碳和非低碳调度模式下节点碳势的变化规律;发现考虑网损后节点的正、负向边际碳势存在一定差异;网损因素也使得电网各节点边际碳势各异,考虑网损的模型可提供更为准确的节点边际碳势信息,可用于开展较为精准的实时碳排放分析.
Abstract
Network losses and congestion have not been considered in the current macro carbon calculation method and carbon flow analysis method for power systems.To achieve precise analysis of carbon emission indicators for power systems,this paper proposes a model to calculate the bus marginal carbon intensity(MCI)of power system considering network losses.A MCI model is established based on coal consumption characteristics of thermal power units.Based on AC power flow model,a sensitivity model of network losses is established,and a calculation method is proposed to calculate the bus MCI of power systems.The method is further improved with consideration of network constraints.The IEEE 14-bus test system and a real 500 kV system are used to verify the correctness and applicability of the proposed model.The characteristics of MCI is analyzed under low carbon and non-low carbon dispatch modes.It is found that the positive and negative MCI of a bus is different when considering the network losses.The network factor also causes the differences of MCI of each bus.The model considering network losses can provide more accurate bus MCI information,which can be used to conduct more accurate real-time carbon emission analysis.
关键词
边际碳势/网损间接碳排放/边际理论/碳流理论/灵敏度分析Key words
marginal carbon intensity/indirect carbon emissions of network loss/marginal theory/carbon flow theory/sensitivity analysis引用本文复制引用
基金项目
国家电网辽宁省电力公司电力科学研究院科技项目(2022YF-71)
出版年
2024
国家科技期刊平台
NSTL
万方数据