Online monitoring and analysis device for energy efficiency of distribution transformer

Abstract

The invention provides an online monitoring and analysis device for the energy efficiency of a distribution transformer. The device is characterized by comprising a transformer, a primary voltage sensor, a primary current sensor, an auxiliary voltage sensor, an auxiliary current sensor, a temperature sensor and a monitoring terminal. According to the device, voltage and current values of the primary side and the auxiliary side of the transformer can be monitored in real time, the actual running loss of the transformer is calculated according to the load running condition of the transformer, a relevant factor with influence on the energy efficiency of the transformer is analyzed, and a running energy efficiency improvement method is found, so that the loss of the transformer is reduced, the number of times of power interruption caused by failures of the transformer is reduced, and the high-efficiency, low-loss and low-failure running and the fine management of a transformer area of a power distribution network are realized.

Description

technical field [0001] The invention relates to electric power monitoring equipment, in particular to an on-line monitoring and analysis device for distribution transformer energy efficiency. Background technique [0002] Distribution transformer loss is one of the main problems of distribution network line loss. With the rapid increase of load, the scale of distribution network is expanding day by day. , high loss of iron core material, uneconomical operation mode, etc., so it is necessary to measure the no-load loss and load loss of the transformer, and replace and adjust the transformer with high loss and low energy efficiency according to the measurement results, so as to realize energy saving and loss reduction of the distribution network, and improve Power grid energy efficiency. In order to solve the above problems and analyze the exact reasons for this phenomenon, there are two traditional methods. The first method is for engineers to calculate the loss o...

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Problems solved by technology

[0002] Distribution transformer loss is one of the main problems of distribution network line loss. With the rapid increase of load, the scale of distribution network is expanding day by day. , high loss of iron core material, uneconomical operation mode, etc., so it is necessary to measure the no-load loss and load loss of the transformer, and replace and adjust the transformer with high loss and low energy efficiency according to the measurement results, so as to realize energy saving and loss reduction of the distribution network, and improve Power grid energy efficiency. In order to solve the above problems and analyze the exact reasons for this phenomenon, there are two traditional methods. The first method is for engineers to calculate the loss of distribution transformers according to relevant standards. This method can only calculate the theoretical loss of transformers. , the actual loss of the specific transformer cannot be obtained according to the actual operating conditions on site; the second method is to conduct a loss experiment on the site when the distribution transformer is powered off, which is generally used for the acceptance of the transformer before it is put into operation. The no-load loss and short-circuit impedance of the transformer, but this method has an obvious defect, the load loss of the actual operation of the transformer cannot be measured in a short time, and there are problems such as heavy workload and inconvenient construction. It is impossible to accurately calculate the operating loss of the transformer, monitor the load characteristics for a long time, calculate and analyze the optimal economical operating voltage of the transformer, and adjust the voltage value of the secondary side, so it is impossible to analyze the actual operating energy efficiency of the transformer and the way to improve the operating energy efficiency

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