Power distribution network fault indicator for capacitor voltage-dividing power taking and control method of power distribution network fault indicator

Abstract

The invention provides a power distribution network fault indicator for capacitor voltage division power taking and a control method thereof. The power distribution network fault indicator for capacitor voltage division power taking is connected with a power distribution network line 9 and comprises a power taking module 1 and a fault indicating device 2, and the power taking module 1 is connected with the fault indicating device 2; the power taking module 1 comprises a capacitor structure, the capacitor structure is connected with a power distribution network line 9, and the power taking module 1 takes power from the power distribution network line 9 in a voltage division mode through the capacitor structure and converts the power into stable direct-current voltage to supply power to the fault indicating device 2; the fault indication device 2 is in contact with a power distribution network line 9 or is arranged below the power distribution network line 9, and is used for collecting power distribution network data and carrying out power distribution network fault diagnosis and alarm by processing the power distribution network data; the power distribution network data comprises current and electric field data. When the device provided by the invention is used for taking electricity, the influence of the current of the high-voltage side bus is avoided, the power supply stability is ensured, and the equipment volume is obviously reduced.

Description

technical field [0001] The invention belongs to the technical field of distribution network operation control, and in particular relates to a distribution network fault indicator and a control method thereof for capacitor voltage division to obtain power. Background technique [0002] With the development of smart grid, online detection equipment is widely used in distribution network. As an important detection device for distribution lines, the distribution network fault indicator indicates the type of line fault and the fault outlet, branch and section by detecting characteristic quantities such as voltage and current of the distribution line, which provides great convenience for finding faults. Among them, the current transformer (TA) has the advantages of small size, easy installation, low insulation requirements, simple structure, and low cost, and is widely used in the field of distribution network fault indicators. [0003] However, there are obvious defects in TA po...

AI Technical Summary

Problems solved by technology

First, the amount of current energy harvested depends on the load of the distribution line. When the grid load is very light, the current is even less than 1A, and the current transformer cannot obtain enough energy to supply power to the fault indicator; second, when a short-circuit fault occurs, the current Up to tens of thousands of amps, the large range of current changes makes the circuit design more difficult when TA takes power, resulting in unsatisfactory power taking effect

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