A coordinated trading method for the inter-provincial electricity spot market considering the impact of UHVDC transmission systems

Abstract

The impact of high-voltage direct current （HVDC） transmission systems on inter-provincial power flow models is addressed by proposing a coordinated trading method for the inter-provincial electricity spot market （hereinafter referred to as the inter-provincial market）. The process of inter-provincial market expansion is divided into a provincial agent bidding curve model and a coordinated inter-provincial market trading model. The method employs an AC-DC decoupling approach for power flow calculations within and between provinces. The provincial agent bidding curve model， with the provincial generation and load demand as decision variables， derives the agent bidding curves for provincial units/loads participating in the inter-provincial market through a regional equivalent model. The coordinated inter-provincial market trading model， using the inter-provincial market trading values as decision variables， achieves market clearing through ADMM （alternating direction method of multipliers）， ensuring a distributed transformation of coordinated trading to prevent leakage of information regarding provincial units and network topology during the trading process. Case studies demonstrate that this method maximizes the overall revenue of the inter-provincial market while safeguarding information privacy and security.

Keywords

• uhvdc transmission systems
• inter-provincial market
• ac/dc decoupling
• admm algorithm
• distributed optimization