基于协调约束的混合电力市场阻塞调度

电力市场改革使得系统发生阻塞的概率越来越大，因而阻塞管理成了电力系统运行的一个主要问题。目前的电力市场多采用联营体与双边合同混合的交易模式。在同一个市场中，两类不同模式的交易之间存在很强的耦合性。当输电容量不充裕时，改变其中一类交易的电力调度都有可能对另一类交易产生直接影响。因此，如何很好地协调调度两类电力交易，是混合市场阻塞调度的一个重要问题。本文发展了一个适用于不同报价函数形式的通用统一清除价计算模型，并提出了一个新的混合市场阻塞协调调度数学模型，通过引入一个协调调度约束，能够直观地处理系统中两类交易的优先性，实现两类交易的协调调度。此外，模型允许在联营体市场中对被削减的合同出力进行再调度。这有利于充分利用发电容量和降低联营体市场的购电成本。最后，以IEEE单区域RTS-96系统为例，对所提出的模型进行了说明和分析。

Congestion Dispatch in Combined Pool/Bilateral Electricity Markets Based on a Coordinated Constraint

The congestion in transmission systems occurs frequently in deregulated power systems, and congestion management becomes a major issue in the operation of power systems. In many electricity markets, a hybrid trading mode, combined pool and bilateral-contract trade, is employed. Powerful coupling relationship exists between these two kinds of trade as both of them are transmitted in the same system. Therefore, how to effectively coordinate the congestion dispatch between these two kinds of trade is a very important issue. In this paper, a general model for uniform market clearing price and a new coordinated congestion dispatching model for pool-bilateral markets, with a coordinated constraint being introduced, are proposed. The degree of priority to any kind of trade could be expressed with this constraint, so coordinated dispatch could be implemented. In addition, the curtailed generation of contracts is allowed for being re-dispatched in the pool market in our model, which would facilitate to fully utilize the generation power and to decrease the purchasing cost of the pool demands. Results of case studies in IEEE One Area RTS-96 system illuminate the feature of the proposed model.