基于消纳责任权重的两级电力市场优化运行模型

Optimal Operation Model of Two-level Electricity Market Under the Responsibility of Renewable Energy Consumption

在中国电力消纳保障机制和新配额制的实施背景下,为了使省内消纳责任主体完成消纳考核,如何利用市场机制激励可再生能源跨省跨区消纳是关键问题之一。为此,借助于省间-省内两级市场,引入了省间可再生能源交易商代理省内消纳责任主体参与省间可再生能源市场交易。在两级市场框架下,以市场运行成本最小化为目标,建立了一种非线性的双层优化消纳模型。上、下层的出清结果作为对方层级的计算参数,利用KKT(Karush-Kuhn-Tucker)条件和拉格朗日对偶理论,将上述双层非线性问题转化为单层线性问题求解。最后,为验证所提模型的有效性对某地区进行算例仿真,分析不同消纳责任权重、绿证价格下的市场运行成本,结果表明两级市场能够有效降低省内消纳责任主体完成考核的市场成本,促进可再生能源的跨省跨区消纳和电力市场的绿色、经济运行。

Considering the implementation of China’s renewable energy(RE)consumption guarantee mechanism as the background,in order to enable consumers of a province to complete a consumption assessment,the market mechanism must be used to encourage renewable energy consumption across provinces and regions.A two-level electricity market has been established,and interprovincial renewable energy dealers have been introduced to act as agents of consumers to buy RE from interprovincial RE markets.Under the two-level market framework,a non-linear bilevel optimization model is established with the objective of minimizing market operating costs,and the clearing results of the upper and lower levels are used as the calculation parameters for the other level.Using the Karush-Kuhn-Tucker conditions and Lagrange duality theory,the nonlinear bilevel problem is transformed into a single-layer linear problem.Finally,in order to verify the effectiveness of the proposed model,an example of a certain area is simulated to analyze the market operating costs under different quota ratios and prices of green certificates.The results show that the twolevel market can effectively reduce the market cost and promote the interprovincial consumption of RE.