Direct current voltage compensation device for power distribution
A technology of compensation device and DC voltage, which is applied in the direction of circuit devices, emergency protection circuit devices, electrical components, etc., can solve the problems of unreliable operation of protection circuits and tripping coils, and achieve strong practicability and popularization, simple installation, and compensation good effect
Inactive Publication Date: 2010-12-01
XUCHANG POWER SUPPLY COMPANY OF STATE GRID HENAN ELECTRIC POWER
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Problems solved by technology
[0003] The purpose of the present invention is to overcome the deficiencies in the prior art and provide a method to effectively solve the problem that the protection circuit and the tripping coil cannot operate reliably when the DC control power supply loses voltage, improve the reliability of the protection circuit operation, and avoid the problem of accident expansion. DC voltage compensation device for power distribution
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[0012] Such as figure 1 As shown, the transfer switch KK of the present invention is connected to the DC control power supply circuit through the check element diode 1D and the diode 2D, and the transfer switch KK is connected with six electrolytic capacitors 1C-6C and six fuses FU1-6 respectively. Six branches composed of FU6 in series, the six branches are connected in parallel on the transfer switch KK, and at the same time, the coil of the time relay SJ, the normally open contact of the time relay SJ and the voltage relay KV are also connected on the transfer switch KK The coil, the normally open contact of the voltage relay KV and the signal lamp HR are connected together with the DC control power circuit.
[0013] Six electrolytic capacitors 1C ~ 6C use CD-1 type. The fuse is RL1-15 / 5A. 2CZ-20 / 25 is selected as the backstop element diode 1D and diode 2D. Change-over switch KK selects LW2-2.6.6a / F4-8X type. The six electrolytic capacitors 1C~6C are divided into two gr...
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The invention relates to a direct current voltage compensation device for power distribution, which can effectively solve faults of a high-voltage power distribution system by installing a set of capacitor energy storage compensation device, a transfer switch KK is connected with a direct current control power supply circuit through check elements of a diode 1D and a diode 2D, six branch circuits constituted by respectively connecting six electrolytic capacitors 1C-6C with six fuses FU1-FU6 in series are arranged on the transfer switch KK, the six branch circuits are connected on the transfer switch KK in parallel, a coil of a time relay SJ, a normally open contact of the time relay SJ and the coil of a voltage relay KV are further connected on the transfer switch KK, and the normally open contact of the voltage relay KV and a signal lamp HR are connected with the direct current control power supply circuit together. The direct current voltage compensation device for power distribution has good direct current voltage compensation effect, and can effectively solve the problem that the switch can not act correctly in time after direct current voltage-loss; and the two groups of the capacitors are in mutual backup, and the direct current voltage compensation device further has the characteristics of simple installation and low price.
Description
technical field [0001] The invention relates to a DC voltage compensation device for power distribution which can effectively solve the failure of a high-voltage power distribution system by installing a set of capacitor energy storage compensation device. Background technique [0002] At present, in the high-voltage switch cabinets of the high-voltage power distribution rooms of many enterprises, spring-operated or electric-operated circuit breakers are used for closing and opening. The AC power source is taken from the transformer in the institute. Due to the implementation of unattended duty, most of the backup DC power sources (lead-acid battery packs) have been cancelled. In this way, due to the lack of backup DC power supply in the power distribution room, system failures, control bus voltage loss, and protection refusals have occurred many times. Case. Contents of the invention [0003] The purpose of the present invention is to overcome the deficiencies in the pri...
Claims
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IPC IPC(8): H02H7/22H02J9/04
Inventor 赵新卫
Owner XUCHANG POWER SUPPLY COMPANY OF STATE GRID HENAN ELECTRIC POWER