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工程科学与技术:2023,55(1):14-25
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基于新能源品质量化的电力现货市场模式设计
(西华大学 电气与电子信息学院,四川 成都 610065)
Design of the Electricity Spot Market Model Based on Renewable Energy Quality Quantificationn
(School of Electrical and Electronic Info., Xihua Univ., Chengdu 610065, China)
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投稿时间:2022-07-22    修订日期:2022-12-09
中文摘要: 针对传统市场机制不能充分体现新能源发电与常规机组之间及新能源之间发电特性区别这一缺陷,本文提出一种适应高比例新能源参与的现货市场交易模式。首先,将新能源发电属性分为电源属性和负荷属性,将新能源引起的实时市场与日前市场结算差额定义为系统平衡成本。通过分析新能源属性对系统平衡成本的影响机理,确定以准确性指数和相关性指数描述新能源属性,并利用改进叉熵法赋权形成新能源电力品质指数,将该指数及系统平衡成本联合形成品质价格以量化新能源的电力品质。其次,对美国PJM市场出清模式进行改进,将新能源机组附加电力品质价格与常规机组统一出清,建立同台竞争的市场交易环境,并提出激励相容的结算规则。最后,基于改进的IEEE 30节点系统算例分析验证了所提模型和计算方法的有效性。算例结果表明,考虑新能源品质价格后出清可以实现高品质新能源优先消纳,降低日前实时偏差调整电量,减少系统平衡成本,降低市场平均电价,同时常规机组在负荷高峰时段可获得额外收益,且新能源采取策略报价将会导致其亏损平均增加9%。研究结果表明:所提模式有利于新能源品质提升及市场公平竞争,为长期处于边际机组的固定成本回收问题提供解决方案,引导常规机组容量投资,为建设新型电力系统提供容量保障。
Abstract:In order to solve the problem that the traditional electricity market mechanism can’t fully reflect the characteristics differences between renewable energy generations and conventional generations, a spot market trading model of the electricity market with high renewable energy proportion was proposed in this paper. Firstly, the renewable energy generation attributes were divided into resource attributes and load attributes, and the difference of the settlement between the real-time market and the day-ahead market caused by renewable energy generations was defined as the system balance cost. By analyzing the impact mechanism of renewable energy attributes on the system balance cost, the accuracy index and correlation index were used to describe those attributes. The renewable energy power quality index was further presented using the improved cross-entropy method. Combining this index and the system balance cost, the renewable energy power quality price was obtained for quantifying the power quality of the renewable energy. Secondly, the clearing model of the PJM market in the U.S. was improved. Renewable energy generations were added with the power quality price and cleared together with conventional generations. A market trading environment with competition on the same platform was established and the incentive-compatible settlement rule was proposed. Finally, an improved IEEE 30-nodes system example was used to verify the effectiveness of the proposed model. The case results showed that the proposed clearing method can achieve a priority consumption of high-quality renewable energy, reduce amounts of power deviation between the day-ahead market and the real-time market, decrease the system balance cost and the market average electricity price. Moreover, conventional generations can get extra income during the peak load period and the strategic bidding of renewable energy will increase its loss by an average of 9%. The research reflected that the proposed model is in favor of the improvement of renewable energy quality and fair competitions. The proposed model provides a solution to the fixed cost recovery of long-term marginal units, guides future capacity investment of conventional units and provides capacity guarantee for the construction of new power systems.
文章编号:202200757     中图分类号:TM614;TM732    文献标志码:
基金项目:国家自然科学基金项目(51877181)
作者简介:第一作者:雷霞(1973-),女,教授,博士.研究方向:电力市场、调度自动化.E-mail:snow_lei246@mail.xhu.edu.cn;通信作者:杨健,E-mail:18612023521@163.com
引用文本:
雷霞,杨健,蔡长林.基于新能源品质量化的电力现货市场模式设计[J].工程科学与技术,2023,55(1):14-25.
LEI Xia,YANG Jian,CAI Changlin.Design of the Electricity Spot Market Model Based on Renewable Energy Quality Quantificationn[J].Advanced Engineering Sciences,2023,55(1):14-25.