A Method Of Transmission System Loss And Congestion Cost Allocation Based On Bilateral Transactions Precedence Principle

In the primitive electrical power market,the power quantity from the monopoly groups take a great part of the whole on the net, and the monopoly groups have great market power. For making the power market develop to a complete competitive market, we need to pass various methods to play down the market power of the monopoly groups. Accelerating the development of bilateral transactions is an important means. So, in the pool power market coexisted with bilateral transactions, how to make bilateral transactions have a larger development is the aim of this article's research. So, it has some theoretic and realistic meaning.It is proposed a method about transmission system loss and congestion cost allocation based on bilateral transactions precedence principle. First, solve the pool unit commitment by adopting merit-order method. Add bilateral transactions, then carry on a power flow calculation. Consider the transmission limits on lines, and confirm transactions whether they can go or not. If appears congestions, use the method of the least electricity expenses increment based on sensitivity to remove it.When allocating transmission loss and congestion cost, adopt a new method which is different from the past various methods. The old methods treat with bilateral transactions equal to pool transactions. When confirming the share of all the transactions on lines, the new method first allocates the bilateral transactions tracking the optimization roads. The rest part on lines is proportionably allocated by tracing power flow. It is promised to take back all the transmission loss and congestion cost. The end, the IEEE-9 and IEEE-30 test samples have been shown the validity of the proposed method.