| "Several Opinions on Further Enhancing the Reform of Electric Power System"(Abbreviated as "No.9 Document")issued by the Central Committee of Communist Party of China launched a new round of electric power system reform in China.Relevant departments of the power system reform in Guangdong Province issued the "Basic Rules for Trading in Guangdong Electricity Market(Trial)" and "Measures for the Implementation of Regulation of Guangdong Electricity Market(Trial)" to carry out various medium and long-term power trading including monthly bilateral auction trading.The majority of market trading entities have demand to protect the legitimate interests in electricity market.The Southern Energy Regulatory Bureau of the National Energy Regulatory Authority has duty to strengthen market regulation and maintain market trading order.Combined with practical problems in market trading,this paper deeply researches on market power regulation of monthly bilateral auction electricity market in Guangdong Province and provides references for regulatory agency to conduct market power behavior investigations,which has important theoretical value and practical significance.Firstly,it analyzes basic situation of electricity market in Guangdong Province,summarizes process of market trading clearing,analyzes regulation content of Guangdong electricity market and existing market power regulation issues,proposes the method of ex-ante and ex-post regulation and constructs a market power regulation system including whole process of market power behavior screening,evaluation and judgment.Secondly,considering the advantages of two typical ex-ante regulation methods of market power and SCP analysis model,this paper innovatively proposes a new ex-ante regulation method of Guangdong’s monthly electricity market based on market structure impact test,combines two advantages that market structure test is to judge whether a market entity has market power and market power test is to judge influences of market entity occupying market power on market clearing result,gives overall process of ex-ante market power regulation and process of market structure test and market power impact test.The market trading mathematical clearing model and referenced offer calculation model which lays the foundation for full-text quantitative analysis are proposed.The processes of screening,assessing,preventing and controlling of ex-ante market power behavior are explained in detail.Taking the monthly trading data of Guangdong in September as an example,the quantitative analysis of market structure test and market power impact test of power generation enterprises is carried out.Finally,according to supply and demand theory in microeconomics and definition of market power,a unifying ex-post regulation method based on price offset index and wealth transfer rate for Guangdong’s monthly bilateral auction trading is innovatively proposed by analyzing basic principles of market offer affecting market price offset and obtaining excess profit relative to referenced offer,and the judging criteria of two market power regulation indicators is clarified to judge whether a market entity has exercised market power and calculate the profit obtained by exercising market power.The quantitative calculation process of market power regulation indicators is elaborated in Guangdong’s monthly bilateral auction trading in September.The market power regulation indicators of power generation enterprises under multi-month scenarios are calculated from August to December,and judging conclusions of market power behavior are given. |
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