The Research On Loss Allocation In Distribution Networks With Distributed Generation

Distributed generation is a new trend in new century in prospect of power sources technique. The developments of distributed generation have a great influence on the traditional power system and bring about electrical technology notable advancement. In order to utilize disperse energy resources and improve utility system reliability, distributed generations are applied in power system more and more widely. But the access of a large amount of distributed generation will bring the new challenge to the operation and control of the distribution network. one is the influence on the trend and loss of the distributed network and the allocation of the variations in the losses.The paper classifies and discusses several popular distributed generation techniques firstly, analyses the advantage and disadvantage of it and the influence on distributed network. losses problem of the distribution system is addressed in this paper, based on ideal models of distribution system, the author discusses and concludes the DG influence on power losses, considering three related factors: the relative magnitude between the DG and load, the location of DG and operating condition. Finally, based on contribution Factor and power flow tracing method, the paper proposed a method for the variation of loss allocation in distribution networks with distributed generation. The introduction of distributed generation makes the loss of the whole distribution networks to be changed. Based on tracing the real and imaginary parts of branch current, this paper tries to allocate the loss in distribution networks, especially the loss variation due to the introduction of distributed generation. Firstly, the losses in the distribution network, in the absence of distributed generation, are allocated to the consumers. Secondly, the variations in losses that result from the introduction of distributed generation are allocated to the generators. These variations are a measure of the avoided or added costs related to losses. The method can be used as an economic basis for the introduction of the distributed generation. The paper uses a simple and classical distribution networks with distributed generation to calculate and the results prove the validity and feasibility of the method.