可再生能源消纳背景下直接交易中的二次出清与定价

为了促进可再生能源电力消纳,可再生能源优先发电企业在参与受端省电力市场直接交易时,所有交易电量需要全部成交。为了满足这一要求,部分省市采用了二次出清的交易机制,该机制目前没有相关研究,因此有必要对该机制的交易流程和定价方法进行研究。以双侧竞价、统一边际电价出清的电力市场模型为基础,建立了匹配出清与二次出清相结合的电力市场数学模型,提出二次出清定价应当符合的3条原则。在此基础上分析了统一边际价格在二次出清定价时存在的问题,并提出一种新的定价方式,最后用算例进行了阐述。

Secondary Clearing Rules and Price Determination in Direct Electricity Trading with Renewable Energy Consumption

To promote the accommodation of renewable energy, when renewable energy power generation enterprises participate in the direct purchase of Shanghai power market, all their power needs to be purchased. To satisfy this policy, some provinces use a trading mechanism called secondary clearing, which lacks of relevant research. Therefore, it is necessary to study the transaction process and pricing method of this mechanism. According to the power market model of bilateral bidding and marginal clearing price, this paper establishes a mathematical model of power market which combines matching clearing and secondary clearing, puts forward three principles that pricing of secondary clearing should conform to, and analyses the problems existing in marginal price. A new pricing method is put forward by illustrating with an example.