Research On Loss Calculation And Loss Allocation In Electric Power Market

With the development of global innovation in electric power market, transmission system will ultimately be an independent part of the market transaction. Transmission loss cost allocation is an important constitution of transmission tariff, different loss allocation method will affect economic benefit and trade enthusiasm of each market member, so loss allocation problem is desired to settle in electric power market.In this paper, it firstly introduced several familiar loss calculation methods and pointed out the tide of loss calculation in electric market. The paper mostly researched on loss allocation and firstly researched 4 defferent loss allocation methods, according to the compared results, made out some common problems exist in loss allocation methods, then spent lots time and energy in researching on power flow tracing method and marginal loss coefficient method.The power flow tracing method has 2 ways at present: one is based on topology network matrix, another is based on graph theory. The bi-directional allocation method is put forward on upstream tracing method and downstream tracing method, loss of each transmission component is shared by both generators and loads in this new method.Marginal loss coefficient method is applied in several electric power market at present.This method has a good economical signal, but the total loss of the system is not equal to actual loss via this method, so the paper used the scaling method to regulate the total loss. Marginal loss coefficient method is not allocate loss to generators on the balance bus, an improved method was given in order to slove this problem, the results of calculation example shows that the improved method can avoid the generators in the network pay for the generator on the balance bus.