| In the context of the continuous worsening of the global environment and the increasingly serious energy crisis,the energy saving and loss reduction has become an important policy in the State Grid Corporation of China(SGCC)to respond to build a conservation-oriented society.Power grid line loss rate is an important economic and technical index of the electric power company,and the lOkV network line loss accounts for the main parts.From the planning and design of power grid to the operation and management,the electric power company should take effective measures to reduce the power grid loss rate and ensure the economic benefits of company.At present,SGCC is planning the grid reasonably,and speeding up the progress of the construction to optimize the grid structure.At the same time,SGCC is promoting the scientific management mode,and innovating new technology of loss reduction.The company is constantly improving the management of line loss,and minimizing the loss of power grid.This is also one of the important measures to ensure the operating benefits and enhance the competitiveness of the SGCCThis paper discusses the basic theory of 10kV network line loss,including the concept,classification,influence factors and so on.The article comprehensively studies the current methods of line loss calculation,and summarizes the advantages and disadvantages of practical applications.In the comparison of the shortages of traditional analytical methods,such as poor accuracy,difficulty in data acquisition,and long calculation period,the methods introduced in the article can get the lOkV grid structure and electricity information,calculate the segmentation of line loss thorough the intelligent node monitoring equipment and the big data platforms such as electricity information acquisition system.So we can establish an effective model,conduct lOkV distribution network line loss calculation scientifically and quickly.Based on the data,we can also analyze the cause and composition of the 10kV line loss and the inferior low-voltage part at the same timeIn the article,an example of a 10kV distribution network in Yantai City is verifiedThe 10kV distribution network is divided into two parts:10kV line and low-voltage station area.We can aggregate and analyze the information thorough the relevant big data platform.In the part of 10kV line,the new high-voltage electric meter is used to realize the line loss segmentation calculation.In the low-voltage station area,the low-voltage node line loss monitoring unit(NMU)is used to realize the low-voltage line loss segmentation calculation.The method can locate the position of the power loss and the abnormal fault quickly,and get the line loss calculation result accurately.Then the root of the lOkV network line loss problem is clearly defined by the inspection on the spot and the data comparison of different nodes.With the comparison of line loss rate before and after,it is concluded that the methods described in the article are scientific and effective to reduce line loss of lOkV distribution network.While technical measures are taken,we should also strengthen management measures to further improve line loss management including salary reward,skills training,and management innovationLooking forward to the future development prospects of distribution network line loss,electric power companies should continue to develop in the direction of intelligence and information in various professional fields such as marketing and production.The companies should also promote the application of information platforms such as the acquisition system and the integrated line loss system.And the intelligent node monitoring equipment should be arranged rationally such as high-voltage energy meter and low-voltage node line loss monitoring unit.So we can realize the line loss segmentation calculation,and adapt to the rapid development of the distribution network under the new situation.On this basis,electric power companies can save the power loss scientifically and efficiently. |
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