Integral control system of distribution transformer

Abstract

The invention discloses an integral control system of a distribution transformer. A high-voltage electric control switch and a high-voltage fuse are arranged in sequence from a high-voltage power transmission line and the high-voltage output end of a distribution transformer; the input end of the distribution transformer is provided with a low-voltage electrical control switch; the low-voltage electrical control switch adopts the configuration of a low-voltage permanent-magnet automatic knife-like switch and a low-voltage fuse or adopts a permanent-magnet low-voltage air switch; the system also comprises an electric controller; the electric controller controls an operating part of the high-voltage electrical control switch and an operating part of the low-voltage electrical control switch; the system also configures an independent non-contact voltage regulating device for the distribution transformer; the system adopts a high-voltage electron to provide power for a control and protection circuit. The invention is beneficial to ensuring the voltage quality, improving the transformer efficiency and saving electric energy as well as manual labour and is suitable for high-voltage power transmission and transformation stations.

Description

technical field [0001] The present invention relates to automatic control equipment in a power distribution network, in particular to an integrated control system for distribution transformers. Background technique [0002] Distribution transformers are the key equipment for voltage transformation, power transmission and direct distribution to users in the power distribution system. There are various types of distribution transformers with different capacities and sizes for different user characteristics. At present, the control and management of distribution transformers are basically ancient. In the high-voltage side, most of them are drop fuses or power distribution isolating switches manually operated by insulating rods. Only a few important users with large capacity use expensive vacuum switches, sulfur hexafluoride switches or oil switches, etc. Equipment, and the operation of these switches is also mostly manual operation, the operation is cumbersome, the time of powe...

AI Technical Summary

Problems solved by technology

In order to make the supply voltage more stable, the transformer is equipped with a transformer voltage regulating switch. The distribution transformer voltage regulating switch is divided into a non-excitation voltage regulating switch and a load voltage regulating switch. The load voltage regulating switch is currently a mechanical switch. , many mechanical failures, long operating time, large volume, and expensive, so most distribution transformers adopt the off-excitation voltage regulation method. This off-excitation voltage regulation is to adjust the voltage without electrification, and the voltage regulation requires the transformer to be powered off. , the power outage procedure is complicated, and sometimes the transformer is burned if the adjustment is not good. After manual adjustment, it is necessary to test the contact condition of the voltage regulating switch. This method of voltage regulation takes a long time. Therefore, this kind of manual voltage regulation cannot keep up with the change of system voltage. For various reasons, people rarely adjust the non-excitation voltage regulation switch. Many users do not even know that there is a voltage regulation switch on the distribution transformer until the transformer is used. Even if it is bad, the tap changer has not been adjusted, so this kind of non-excitation voltage regulating switch is basically like a fake

Secondly, the economic operation of distribution transformers is also in a superficial state, and it is impossible to realize the refined operation management of the station area

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