不同类型双边交易建模方法研究

Modeling Method for Different Types of Bilateral Transactions Bilateral Transaction

在电力市场初级阶段,基于全电量集中竞价的出清机制或基于增减报价的平衡机制尚未建立,电力系统调度运行面临着计划电与市场电并存的局面。双边交易规模不断扩大,不同电量成分的协调执行是市场过渡阶段调度运行面临的新挑战。电量合同以合同规定电量为依据结算,而电力合同以合同规定出力曲线为依据结算,文章考虑2种不同双边交易,分别研究双边电量合同与双边电力合同参与日前电力电量平衡的建模方法。考虑2类双边合同与计划电的协调执行,及电网阻塞对交易执行的影响,最终建立兼顾双边交易执行、计划电执行、发电经济性和电网安全的日前机组组合模型。通过算例分析模型中权重因子和削减因子选择方法,研究不同削减方法对交易执行的影响,交易执行权重选择对双边交易与计划电协调执行的影响,以及电网阻塞对交易执行的影响,最后验证模型在各类合同协调执行方面的有效性。

In the initial stage of the electricity market,because the clearing mechanism based on the centralized bidding of all the electricity or the balance mechanism based on the increase or decrease offer has not been established,the power system dispatching operation is facing the situation of coexistence of planned electricity and market electricity. The scale of bilateral transactions has been expanding and the coordinated implementation of different power components is a new challenge for the operation of the market during transition stage. Because The power volume contract is settled on the basis of the contracted volume,and the power contract is settled on the basis of the contracted output curve. This paper considers above two different types of bilateral transactions. Based on the analysis of the implementation requirements and reduction method of the two types of different bilateral transactions,this paper studies the modeling methods for bilateral power volume contract and bilateral power contract respectively for participating in the day-ahead power and electricity balance. Taking into account the coordinated implementation of the two types of bilateral contracts and planned power contracts,as well as the impact of grid blockage on the implementation of the transaction,this paper finally establishes a day-ahead unit commitment model of bilateral transactions and planned power implementation,power generation economy and power grid security. This paper analyzes the selection method of weight factors and reduction factors in the model through examples,studies the effect of different reduction methods on the execution of the transactions,studies the influence of the transaction execution weight selection on the coordinated execution of bilateral transaction and planned power contract,studies the influence of grid congestion on transaction execution,and verifies the effectiveness of the model on coordination execution of contracts.