Study Of Comprehensive Evaluation In Unlocking The Electromagnetic Loop Network

With the rapid growth of electric power demand, electric power grid of higher voltage class is needed for power transmission to reduce the transferring loss in grid. That really brings benefits to grid in a certain period. But the negative effects of electromagnetic loop network are emerging gradually due to the continuous expansion of the scale grid. Great loss has happened frequently resulting from the problems of electromagnetic loop network. So open-loop of electromagnetic loop network has been the significant problem in electric power network. At present, conditions for decoupling of electromagnetic loop network have been permitted and many places have begun to conduct open-loop work. The safe and speedy developments of power system are extremely important to national welfare and the people's livelihood. Therefore, the system must be estimated before the project is implemented to ensure the conducting of the project. On condition of this situation, it has important practical significance to study the evaluation of the scheme of unlocking electromagnetic loop network.Because of this, the author has done in-depth study of inadequacies of the method in the areas of research by adopting a comparatively complete comprehensive evaluation system. At first, as for understanding the context more clearly and easily, the paper introduces related theory of electromagnetic loop network, which includes the conception and causes of electromagnetic loop network, advantages and disadvantages of the electromagnetic loop network on electric network, the principles of decoupling scheme of electromagnetic loop network and steps it follows. Then, a practical evaluation system of unlocking of electromagnetic loop network for the specific characteristics of high voltage power grid is proposed which is according to screening methods and indicators to establish the principles of evaluation system in comprehensive evaluating process. The evaluation system is suitable for practical application for comprehensively considering the technical soundness, power economy, reliability and other factors, and then select more than one solution to fully reflect the merits of the unlocking of electromagnetic loop program. It also summarizes methods which are usually used in comprehensive evolutions. At last, in case of the project of decoupling of one electromagnetic loop network, the paper evaluates performance about decoupling of electromagnetic loop network by applying traditional analytic hierarchy process (AHP) and entropy weight fuzzy evaluation method. The evaluation results of these two methods agree well. The advantages and disadvantages of the two methods were obtained by comparing solving processes.