Research On Allocation Of Transmission Losses Using A Radial Equivalent Network Importing ITL

After the power system imported market, loss allocation has been very important. However, existent procedures for loss allocation have some shortcoming.Narayan S.Rau provided a procedure to allocate loss using a radial equivalent network in 2001, and he provided a good idea for loss allocation. The author has researched loss allocation procedure using a radial equivalent network, and expounds the essential theory about this approach.This paper analyzes existing procedures for seeking the RE, and points out their shortcoming. These procedures do not take full advantage of the actual network's topology and power flow, therefore the result from this procedure is arbitrary and unfair. In addition, it is not appropriate that the mathematic models these procedures conceive set the G and B of the branches as object quantity. If generator-k and load-h connect the same bus in the actual network, the active power is not transmitted from generator-k to load-h in the RE. Such result apparently disobeys the order of nature.This paper provides a procedure to seek the RE. This procedure takes advantage of the Incremental Transmission Loss coefficients (ITL) between generators and loads, and the loss rate from generators to loads is deemed as ITL, therefore the RE gotten through this procedure possesses the ITL between generators and loads same as the actual network. The ITL between generators and loads node reflects the actual network' topology and power flow, therefore, the RE obtained through this procedure is more fully equivalent to the actual network. In addition, this procedure chooses the active power flow in every branch of RE as the object quantity, and it can deal with the network in which generators and loads connect the same node.Finally, the example results illustrate the rationality of the procedure presented by this paper.