CN201038718Y

CN201038718Y - Device for implementing transformer substation segmental time-delay automatic reclosing by voltage conversion

Info

Publication number: CN201038718Y
Application number: CNU2007200211510U
Authority: CN
Inventors: 孙振亮
Original assignee: SHANDONG JINYU TYRE CO Ltd
Current assignee: SHANDONG JINYU TYRE CO Ltd
Priority date: 2007-04-19
Filing date: 2007-04-19
Publication date: 2008-03-19
Anticipated expiration: 2017-04-19

Abstract

The utility model relates to a delaying automatic reclosing device in the transformer substation. The technical proposal is: the AC 100V power loop is orderly in series with a switching self-lock switch, a central relay KA and the normally closed contacts of two groups of magnet-supporting relay KA2 and KA3. The AC 220V power loop is orderly in series with a time relay KT and three magnet-supporting relay KA1, KA2 and KA3; the circuit of the time relay KT is in series with the normally opened contact of the central relay KA; and the circuit of the three magnet-supporting relay KA1, KA2 and KA3 is alternately connected with the delay contact of time relay KT, the normally opened contacts of KA1 and KA2, and the normally opened contacts of KA2 and KA3; and the wire of the 220V power is connected with two-phase switch SB. When the manually closed switch is in parallel with the normally contact of magnet-supporting relay KA1, the utility model can automatically resume the power supply in the shortest time, eliminating the reclosing hazard in the accident; moreover, the misoperation in the repair of circuit is also prevented.

Description

Realize the automatic coincidence arrangement of transformer station's fragment delay by voltage transitions

Technical field:

The utility model relates to transformer station power supply control field, specifically is that a kind of transformer station that allows realizes the automatic coincidence arrangement of time-delay.

Background technology:

Transformer station is the maincenter that electric power is provided for the user, in order to guarantee under unattended situation, in time to restore electricity, and main at present the intelligent protection device that adopts with automatic coincidence.This device just can be realized the automatic coincidence of transformer station, but in realizing the process that overlaps automatically, exist under the charged situation of main inlet wire, cause each minute transformer station to start simultaneously at one time, cause very big rush of current to electrical network, and the high-tension transformer of main inlet wire is also had very big injury.

The utility model content:

The purpose of this utility model is exactly in order to remedy the defective that existing intelligent protection device exists, proposes a kind of can be in time, segmentation carry out pass through the automatic coincidence arrangement of voltage transitions realization transformer station's fragment delay.

Realize that the technical scheme that above-mentioned purpose adopts is: exchange the normally-closed contact that contact successively on the 100V electric power loop separating brake self-lock switch #1, auxiliary relay KA and two groups of magnetic help formula relay K A2, KA3.One road time relay KT in parallel successively and three road magnetic help formula relay K A1, KA2, KA3 on the alternating current 220V electric power loop, the normally opened contact of polyphone auxiliary relay KA on time relay KT circuit, help the delayed contact of polyphone time relay KT on the formula relay K A1 circuit at magnetic, help by magnetic and be connected in magnetic after the normally opened contact parallel connection of formula relay K A1, KA2 and help on the formula relay K A2 circuit, help by magnetic to be connected in magnetic after the normally opened contact parallel connection of formula relay K A2, KA3 and to help on the formula relay K A3 circuit, on the alternating current 220V electric power incoming line, connect two-position switch SB.Help formula relay K A1 in parallel at closing by hand switch #2 two ends with magnetic.

Device of the present utility model; be mainly used in when having a power failure suddenly in transformer station; unattended operation in the transformer station; can be in the shortest time automatic recovery of power supply; this device has remedied that existing intelligent protection device can only be realized overlapping and defective that can not segmentation; also stopped the harmfulness that under accident, overlaps, more avoided because line maintenance and the situation of misoperation.

Description of drawings:

Accompanying drawing is the circuit theory diagrams of a kind of exemplary embodiments of the present utility model.

Embodiment:

With reference to accompanying drawing, draw one group at main inlet wire side voltage transformer and exchange the 100V power supply, exchange the normally-closed contact that contact successively on the 100V electric power loop separating brake self-lock switch #1, auxiliary relay KA and two groups of magnetic help formula relay K A2, KA3.Draw the alternating current 220V power supply at the station with transformer, one road time relay KT in parallel successively and three road magnetic help formula relay K A1 on the alternating current 220V electric power loop, KA2, KA3, the normally opened contact of polyphone auxiliary relay KA on time relay KT circuit, help the delayed contact of polyphone time relay KT on the formula relay K A1 circuit at magnetic, help formula relay K A1 by magnetic, being connected in magnetic after the normally opened contact parallel connection of KA2 helps on the formula relay K A2 circuit, help formula relay K A2 by magnetic, be connected in magnetic after the normally opened contact parallel connection of KA3 and help on the formula relay K A3 circuit, on the alternating current 220V electric power incoming line, connect two-position switch SB.Help formula relay K A1 in parallel at closing by hand switch #2 two ends with magnetic.

Principle of the present utility model and install and use explanation: when occurring having a power failure suddenly, because the inherent main inlet wire side in main sub-station all is equipped with voltage transformer, as long as go out the interchange control voltage of 100V from the voltage transformer side-draw, in each feeder line cabinet outlet side this device is installed, allow and respectively go out line loop according to its importance automatic switching successively, the separately impact of electric current, rely on voltage automatically electricity to be delivered to the workshop, reduce the time that has a power failure, this device can or line fault not occur owing to artificial interruption maintenance and cause the automatic phenomenon that overlaps of device appearance to take place, thereby more can not occur because the phenomenon generation that the control circuit fault causes main line to break down.

When the transformer station inherence runs into unexpected power failure, be nothing but to occur respectively going out that wiretap is threaded off automatically owing to have a power failure suddenly and owing to be not able to do in time manually to disconnect and cause that each segmentation transformer starts the phenomenon generation that causes big electric current simultaneously when incoming call, the automatic coincidence arrangement of delaying time need be when main inlet wire has a power failure suddenly at technical elements, thereby each main sub-station causes each segmentation to be threaded off automatically owing to online under-voltage, unexpected so on the net when electric voltage transformer charged, the transformer station station gets with transformer.If the SB two-position switch is in logical position, just this device has been dropped into running status, just can utilize the secondary 100V voltage of voltage transformer to control the connection of KA relay, this moment, the normally opened contact of KA relay was connected, promptly cause KT time relay closure, the delayed contact of the process KT time relay is by the conducting of KA1 relay.The KA1 relay normally open contact on the one hand can be with closing by hand switch contact (5 the close 6) short circuit that is attempted by on the high-voltage board change over switch operating handle, according to allowing the operate time of reconciling the time relay outgoing switch play the purpose that time-delay overlaps automatically after conducting.On the other hand for operating 100VKA relay is unlikely to be in for a long time running status, connection by the KA1 relay, KA2, KA3 two relays are got, the normally-closed contact that is serially connected in KA2 in the 100V control circuit, KA3 two relays is disconnected, make 100V KA relay out of service from circuit.For being told, this device belongs to the still under-voltage release power failure of manual operation power failure, the manual disconnection auxiliary contact on the universal seclector handle in the 100V control circuit, have been connected in series again, make transformer station in maintenance during certain loop such as manual disconnection change over switch, 19,20 two just can conducting, the automatic coincidence arrangement of delaying time just the misoperation phenomenon can not occur, in control loop, be connected in series the normally-closed contact of a KA3 relay again in order to ensure the fail safe of control loop more, thereby make the control loop can be owing to the malfunctioning automatic coincidence arrangement misoperation that causes delaying time of KA2 relay, as think that people's coincidence automatically that need not realize delaying time on duty is arranged temporarily, two-position switch can be broken from control loop, being installed as of this automatic coincidence arrangement of delaying time realizes in the transformer station that unattended operation has had big new an improvement again at technical elements.

Claims

1. realize the automatic coincidence arrangement of transformer station's fragment delay by voltage transitions, it is characterized in that: exchange the separating brake self-lock switch (#1) of contacting successively on the 100V electric power loop, auxiliary relay (KA) and two groups of magnetic help formula relay (KA2, KA3) normally-closed contact, one road time relay in parallel successively (KT) and three road magnetic help formula relay (KA1 on the alternating current 220V electric power loop, KA2, KA3), on the time relay (KT) circuit, the contact normally opened contact of auxiliary relay (KA), help the delayed contact of the time relay (KT) that contact on formula relay (KA1) circuit at magnetic, help formula relay (KA1 by magnetic, KA2) being connected in magnetic after the normally opened contact parallel connection helps on formula relay (KA2) circuit, help formula relay (KA2 by magnetic, KA3) being connected in magnetic after the normally opened contact parallel connection helps on formula relay (KA3) circuit, on the alternating current 220V electric power incoming line, connect two-position switch (SB), help formula relay (KA1) in parallel with magnetic at closing by hand switch (#2) two ends.