Rapid-switching on-load tap switch

Abstract

A rapid-switching on-load tap switch is connected with a multi-tap transformer and is connected with an output of the multi-tap transformer by a selection switch and a switching device, and an output end of the multi-tap transformer has five voltages with different values. The rapid-switching on-load tap switch comprises a tap selection switch and a changeover switch, wherein the tap selection switch is divided into even selectors and odd selectors according to a sequence of an input end, all even selectors are connected with a rated voltage output end of the multi-tap transformer, input ends of the odd selectors are respectively connected with other voltage output ends of the multi-tap transformer, the changeover switch is connected with two output ends of the selection switch, an output end of the changeover switch is connected with a transformer load, the changeover switch employs a high-power to drive a gear, gear transmission employs a large gear ratio, and the switch is changed over by gear driving operating rod cam to achieve rapid switch. The on-load tap switch has the advantages of short switch time, large switching current, high reliability and low cost, and is compact in structure and is convenient to transport when used with the transformer in a matching way, and site test is facilitated.

Description

technical field [0001] The invention relates to the field of electric power technology, in particular to a quick-cut on-load tap changer. Background technique [0002] With the vigorous implementation of the national energy-saving policy, a large number of inverters have been transformed in the auxiliary system of thermal power plants to reduce the power consumption of the unit plant. However, at present, the low-voltage ride-through capability of auxiliary inverters of most thermal power units has not yet been verified, and some even do not have low-voltage ride-through capabilities. Low-voltage ride-through function test, once the voltage drops or is too high, the inverter will trigger low-voltage and over-current protections, causing the inverter to block the output. For high-voltage inverters, the supply is an important auxiliary machine. The outage of the auxiliary machine will eventually lead to the unit tripping accident. [0003] In order to detect the voltage ride...

AI Technical Summary

Problems solved by technology

However, at present, the low-voltage ride-through capability of auxiliary inverters of most thermal power units has not yet been verified, and some even do not have low-voltage ride-through capabilities. Low-voltage ride-through function test, once the voltage drops or is too high, the inverter will trigger low-voltage and over-current protections, causing the inverter to block the output. For high-voltage inverters, the supply is an important auxiliary machine. Auxiliary machine outage will eventually lead to unit tripping accident

[0003] In order to detect the voltage ride-through ability of the inverter, it is necessary to test the high and low voltage ride-through ability of the inverter, but there is currently a lack of corresponding high-voltage inverter testing equipment

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