ORIGINAL RESEARCH
Studying Optimal Strategies of Transmission Congestion Management in the Spot Market
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Guangzhou Power Exchange Center, Guangzhou, China
 
 
Submission date: 2023-08-23
 
 
Final revision date: 2023-09-27
 
 
Acceptance date: 2023-10-10
 
 
Online publication date: 2024-04-25
 
 
Publication date: 2024-05-23
 
 
Corresponding author
Su Yang   

Guangzhou Power Exchange Center, Guangzhou, China
 
 
Pol. J. Environ. Stud. 2024;33(4):4043-4059
 
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ABSTRACT
With the continuous deepening of electricity marketization reform and the large-scale integration of clean energy into the system, the problem of transmission congestion in the power system is frequent, and research on congestion management methods has become a major focus. Therefore, this paper studies the optimization strategy of transmission congestion management in the power spot market. Firstly, the existing congestion management mechanisms were sorted out from two aspects: dynamic management mechanisms, and market steady-state mechanisms. At the same time, the advantages and disadvantages of various mechanisms were summarized. Then, optimization strategies for congestion management were proposed from three aspects: cost optimization, surplus diversion, and risk optimization. Firstly, based on the ATC reduction method and rescheduling method, a congestion cost optimization strategy is proposed. Secondly, a congestion cost pool and multidimensional allocation indicators, are established and a congestion surplus diversion strategy is proposed. Thirdly, a two-level market for transmission rights trading has been constructed to optimize congestion risk. Finally, a case study was conducted in a certain province in eastern and western China, and the results showed that: 1) Considering the rescheduling method and ATC reduction method to optimize congestion costs can reduce congestion costs by 8.22% and 18.83%, compared to only considering the scheduling method and using ATC reduction method. 2) Establishing a congestion cost pool and multi-dimensional allocation indicators to channel congestion surplus can form price guidance signals. 3) Constructing a two-level market for transmission rights trading can increase the efficiency of system operators by 62.75%.
eISSN:2083-5906
ISSN:1230-1485
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