Cost Allocation Mechanism for Frequency Regulation Capacity of New Energy Stations Based on Risk Theory

The proportion of new energy in the power system is constantly increasing, the high randomness and uncertainty of its power output have raised higher requirements on the system frequency regulation capability. Based on the future market environment of new energy bidding, this paper proposes the concept and calculation method of risky frequency regulation value by analogy with the risk value theory in the financial field. Based on the historical data, the new energy output deviation function and load forecast deviation function are fitted. Based on the day-ahead energy-frequency regulation market clearing results, the frequency regulation cost is allocated according to the degree of influence of each risky party on the regulation value at risk. Finally, the analysis of the case study proves that the proposed risk-based allocation mechanism is fair and reasonable, which not only motivates new energy to actively participate in frequency regulation, but also encourages new energy to improve management level and technology update.