Identification of Generating Units That Abuse Market Power in Electricity Spot Market Based on AdaBoost-DT Algorithm

Table 1

Methods and indicators for identifying abuse of market power by generating units.

Methods of abusing market power	Indicator	Quantitative characteristics of indicator
Collusion	Market share	Large market share
	Key supplier index	Key supplier index <1
	Quotation curve correlation coefficient	Large quotation curve correlation coefficient
	Similarity in high quotation rates	Similarity in the high quote ratio close to zero
	Winning rate	High winning rate
	Clearing price escalation rate	High clearing price escalation rate
Physical withholding	Market share	Large market share
	Key supplier index	Key supplier index <1
	Failure rate	High failure rate
	Out-of-merit capacity index	Large out-of-merit capacity index
	Bid winning rate	Low bid winning rate
	Clearing price escalation rate	High clearing price escalation rate
Economic withholding	Market share	Large market share
	Key supplier index	Key supplier index <1
	High quotation rate	Large high quotation rate
	Out-of-merit capacity index	Large out-of-merit capacity
	Bid winning rate	Low bid winning rate
	Clearing price escalation rate	High clearing price escalation rate
Extreme quotation	Market share	Large market share
	Key supplier index	Key supplier index <1
	Weighted average quotation	Excessively high or low weighted average quotation
	Relative level of quotations	Relative level of quotations significantly different from zero
	Capacity pricing index	Excessively high or low capacity pricing index
	Clearing price escalation rate	High clearing price escalation rate