Assessment Model for Interregional Electricity Price Difference and Cross-Regional Electricity Trading Volume Considering Carbon Cost

doi:10.16183/j.cnki.jsjtu.2023.217

Abstract

Abstract:

In the context of achieving the “dual carbon” goal, the task of carbon emission reduction in the power industry urgently needs to be completed. Cross-regional electricity trading can facilitate the remote consumption of surplus renewable resources and contribute to the low-carbon transformation of the power system. Due to the inherent differences in power generation structures across interconnected regions, the impact of carbon costs on the clearing electricity prices within regions varies, leading to dynamic price differences between regions, which, in turn, affects the outcomes of cross-regional electricity trading, and further exacerbates the differences in power generation structures, thereby impacting interval electricity price differences. To address these complexities, this paper proposes an assessment model which considers both carbon costs and interval electricity price differences in evaluating cross-regional electricity trading volumes. The model aims to establish a coherent relationship between interval price differences and cross-regional electricity trading by incorporating carbon costs into the power system production process. It uses the dynamic interval price difference as a signal to determine the trading volume between regions in the evaluation of cross-regional electricity trading volumes. In assessing interval price differences, the model updates the intra-region power generation structure based on unit revenue rates, and contrasts the price differences before and after these structural iterations. Taking the cross-regional electricity trading between two interconnected areas as an example, the results of the computational simulations demonstrate that the proposed model effectively evaluates the dynamic price differences between regions and cross-regional electricity trading volumes. Additionally, it quantifies the impact of power generation structure evolution on interval price differences.

Key words: carbon cost, interregional electricity price difference, cross-regional electricity trading, power generation structure

CLC Number:

TM732

LI Wei, LI Ran, HU Yan, WANG Xiwei, XIONG Kang. Assessment Model for Interregional Electricity Price Difference and Cross-Regional Electricity Trading Volume Considering Carbon Cost[J]. Journal of Shanghai Jiao Tong University, 2024, 58(12): 1835-1845.

Figures/Tables 17

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类型	水电机组	光伏机组	风电机组	火电机组
购电地区	4.1	4.8	9.5	73.8
售电地区	5.5	5.8	5.0	23.4

地区	机组类型	a/(t·MW^-2)	b/(t·MW^-1)
购电地区	燃煤机组	0.0007	0.2449
售电地区	燃煤机组	0.0008	0.1952

机组类型	出力下限	出力上限
燃煤机组	120	600
水电机组	0	100
风电机组	0	500
光伏机组	0	200

通道利用率/%	时间/h
通道利用率/%	不扩容	扩容
[0, 50)	4361	7038
[50, 80)	2646	1674
[80,100)	1125	48
100	628	0

类型	水电机组	光伏机组	风电机组	火电机组
购电地区	72.1	46.7	39.9	-50.5
售电地区	53.1	27	21.6	-60