CN206023211U

CN206023211U - A kind of little bar coupler blocking device of direct current

Info

Publication number: CN206023211U
Application number: CN201620808905.6U
Authority: CN
Inventors: 任志帅; 孟甜甜; 王兆军; 张昌; 毕舟; 马景超; 田野; 王凯; 王旭
Original assignee: State Grid Corp of China SGCC; Dongying Power Supply Co of State Grid Shandong Electric Power Co Ltd
Current assignee: State Grid Corp of China SGCC; Dongying Power Supply Co of State Grid Shandong Electric Power Co Ltd
Priority date: 2016-07-29
Filing date: 2016-07-29
Publication date: 2017-03-15
Anticipated expiration: 2026-07-29

Abstract

The utility model discloses a kind of little bar coupler blocking device of direct current, including #1 DC chargings module and its accumulator battery, #2 DC chargings module and its accumulator battery, D.C. contactor DL, direct current mother feeder switch 1ZK, direct current mother feeder switch 2ZK, interconnection switch, with first group of contact of operating handle QK after normally closed auxiliary contact 1Z1 and normally closed auxiliary contact 2Z1 parallel connections, D.C. contactor closing coil HQ, normally closed auxiliary contact D1 is followed in series to form closing circuit, with second group of contact shunt of operating handle QK after normally opened auxiliary contact 1Z2 and normally opened auxiliary contact 2Z2 series connection, so successively with D.C. contactor breaking coil TQ, normally opened auxiliary contact D2 sub-gate circuit in series；Effectively avoiding artificial maloperation interconnection switch causes looped network of DC power to run.

Description

A kind of little bar coupler blocking device of direct current

Technical field

This utility model is related to a kind of little bar coupler blocking device of direct current, belongs to power supply technique field.

Background technology

DC power system is power plant, one of indispensable secondary device in transformer station, and it is given in normal operation Power equipment control, protection, signal power source are provided, make the primary cut-out can be with normal operating, especially when power system thing During old friend's stream power outage, with greater need for a set of safe and reliable DC source, its reliability directly affects power plant and power transformation The safe and reliable operation of station equipment.

For 330kV and above transformer station and important 220kV transformer stations, should be supplied using two group storage battery groups The straight-flow system of electricity, should be connected on one section of dc bus respectively per group storage battery, and dc bus should adopt partition running mode, and two Interconnection switch is set between section dc bus, cyclization forbidden by the switch during normal operation.At present, have two in straight-flow system in a large number The cyclization of set DC source forms the phenomenon of looped network, causes straight-flow system ring network fault frequently to occur.

Utility model content

Technical problem to be solved in the utility model is to provide a kind of direct current little bus connection for the deficiencies in the prior art Network latching device for switch.

A kind of little bar coupler blocking device of direct current, including #1 DC chargings module and its accumulator battery, #2 direct currents Charging module and its accumulator battery, D.C. contactor DL, direct current mother feeder switch 1ZK, direct current mother feeder switch 2ZK, contact are opened Close, D.C. contactor carries operating handle QK, operating handle QK includes 2 groups of contacts：First group of contact, second group of contact, direct current Catalyst DL includes that normally opened auxiliary contact D2 and normally closed auxiliary contact D1, direct current mother feeder switch 1ZK include normally closed auxiliary contact 1Z1 and normally opened auxiliary contact 1Z2, direct current mother feeder switch 2ZK include normally closed auxiliary contact 2Z1 and normally opened auxiliary contact 2Z2, often Close auxiliary contact 1Z1 and normally closed auxiliary contact 2Z1 parallel connection after with first group of contact of operating handle QK, D.C. contactor closing coil HQ, normally closed auxiliary contact D1 are followed in series to form closing circuit, after normally opened auxiliary contact 1Z2 and normally opened auxiliary contact 2Z2 series connection With second group of contact shunt of operating handle QK, structure of so connecting with D.C. contactor breaking coil TQ, normally opened auxiliary contact D2 successively Into sub-gate circuit.

For middle low-voltage-grade equipment, comparing radiant type direct current supply based on the ring network power supply mode of this programme can Lean on property higher.By adopting the D.C. contactor of control divide-shut brake, the air switch that two sets of DC feeder screens are caused switch cubicle The normally closed node of auxiliary to introduce D.C. contactor closing circuit used in parallel, to reach during two bus feeder line cyclizations, interconnection switch Can not close a floodgate；Aided in normally opened node to introduce D.C. contactor trip(ping) circuit simultaneously to be used in series, to realize during auto state, Interconnection switch energy automatic trip during two bus feeder line cyclizations, it is ensured that the independent operating of two sets of straight-flow systems.Compared to traditional connection Network is switched, and is effectively avoided artificial maloperation interconnection switch and is caused looped network of DC power to run.

The installation of this device does not need new screen cabinet, only need to be replaced in former interconnection switch position, but need by The auxiliary contact of feeder line air switch enter this device by new control cable connection.

Description of the drawings

Fig. 1 is D.C. contactor of the present utility model and wiring diagram；

Fig. 2 is schematic diagram of the present utility model；

Fig. 3 is control loop schematic diagram of the present utility model and operating handle QK location tables.

Specific embodiment

Below in conjunction with specific embodiment, this utility model is described in detail.

With reference to Fig. 1 and Fig. 2, the little bar coupler blocking device of direct current, including #1 DC chargings module and its accumulator Group, #2 DC chargings module and its accumulator battery, D.C. contactor DL, direct current mother feeder switch 1ZK, direct current mother's feeder switch 2ZK, interconnection switch, D.C. contactor carry operating handle QK, DC power system adopt the sectionalized single busbar connection method of operation, per section Bus should be respectively adopted independent accumulator battery and power, and set interconnection switch between two sections of dc bus, operating handle QK bags Include 2 groups of contacts：First group of contact 1. 2., second group of contact 3. 4., D.C. contactor DL includes normally opened auxiliary contact D2 and normally closed Auxiliary contact D1, direct current mother feeder switch 1ZK include that normally closed auxiliary contact 1Z1 and normally opened auxiliary contact 1Z2, direct current mother's feeder line are opened Closing 2ZK includes normally closed auxiliary contact 2Z1 and normally opened auxiliary contact 2Z2, normally closed auxiliary contact 1Z1 and normally closed auxiliary contact 2Z1 simultaneously After connection with first group of contact of operating handle QK 1. 2., D.C. contactor closing coil HQ, normally closed auxiliary contact D1 be sequentially connected in series structure Into closing circuit, after normally opened auxiliary contact 1Z2 and normally opened auxiliary contact 2Z2 series connection with second group of contact of operating handle QK 3. 4. simultaneously Connection, so successively with D.C. contactor breaking coil TQ, normally opened auxiliary contact D2 sub-gate circuits in series.

General 35kV and 110kV grade equipments take non-radiative formula single flow to power, but are distinguished by each section of dc bus Draw feeder line and take Split type looped network direct current supply, as shown in Figure 2.This utility model be to this kind of direct current supply pattern under, Prevent the mistake conjunction of feeder line interconnection switch from causing looped network of DC power to run.

It is control loop schematic diagram of the present utility model and operating handle QK location tables with reference to Fig. 3, symbol description in figure：QK 1., 2., 3., 4., direct current mother's feeder switch aids in normally opened contact 1Z2,2Z2, normally-closed contact 1Z1,2Z1, directly for operating handle contact Stream catalyst closing coil HQ, D.C. contactor breaking coil TQ, D.C. contactor switch normally opened contact D2, normally-closed contact D1； Control drawing mainly includes closing circuit and sub-gate circuit.Closing circuit mainly by operating handle QK contacts 1. 2., direct current connects Tentaculum closing coil HQ, D.C. contactor normally-closed contact D1 connection composition；Sub-gate circuit then mainly by QK operating handles contact 3. 4., D.C. contactor breaking coil TQ, D.C. contactor normally opened contact D2 connection composition.

Operating handle QK contact position tables, operating handle QK include 2 groups of contacts, when operation handlebar QK operations to 45 ° (combined floodgate) 2. 1. position, first group of contact turn on, and when -45 ° of (separating brake) positions are arrived in QK operations, 4. 3. second group of contact turn on.

The operating principle in loop：When straight-flow system is normally run, feeder switch 1ZK, 2ZK close position, normally closed auxiliary contact 1Z1,2Z1 disconnect, and D.C. contactor normally opened contact D2 point of position, operating handle QK are closed a floodgate, and closing circuit is obstructed, is prevented effectively from direct current Catalyst DL closes a floodgate.

When feeder switch 1ZK (or 2ZK) point of position, normally closed auxiliary contact 1Z1 (or 2Z1) is closed, and is now rotated clockwise 2. 1. operating handle QK to 45 ° of (combined floodgate) position, first group of contact turn on, and positive supply is connected to closing coil HQ, D.C. contactor DL closes a floodgate.

After in-place closing, the D.C. contactor normally-closed contact contact D1 of closing circuit disconnects switching current, and one is to prevent the 1. 2. contact adhesion causes closing coil to burn out for one group of contact；Two is to prevent from disconnecting switching current by operating handle QK contacts, by Current interruption capacity in operating handle QK contacts is inadequate, easily makes operating handle QK burnings of contact.As direct current mother feeder switch 1ZK When (or 2ZK) closes position and D.C. contactor DL and close position, D.C. contactor normally opened contact D2 closes position, normally opened auxiliary contact 1Z2 (or Position is closed 2Z2), if now female for II (or I is female) feeder line air switch 2ZK (or 1ZK) is closed, sub-gate circuit is turned on, and positive supply connects To breaking coil TQ, D.C. contactor switchs separating brake, disconnects cyclization loop.Separating brake in place after, D.C. contactor normally opened auxiliary touch Point D2 disconnects separating brake electric current, prevents from disconnecting switching current by direct current mother feeder switch 1ZK or 2ZK auxiliary contact, it is to avoid due to which The current interruption capacity of auxiliary contact not enough burns out auxiliary contact.

It should be appreciated that for those of ordinary skills, can be improved according to the above description or be converted, And all these modifications and variations should all belong to the protection domain of this utility model claims.

Claims

1. the little bar coupler blocking device of a kind of direct current, it is characterised in that including #1 DC chargings module and its accumulator Group, #2 DC chargings module and its accumulator battery, D.C. contactor DL, direct current mother feeder switch 1ZK, direct current mother's feeder switch 2ZK, interconnection switch, D.C. contactor carry operating handle QK, and operating handle QK includes 2 groups of contacts：First group of contact, second group Contact, D.C. contactor DL include that normally opened auxiliary contact D2 and normally closed auxiliary contact D1, direct current mother feeder switch 1ZK include normally closed Auxiliary contact 1Z1 and normally opened auxiliary contact 1Z2, direct current mother feeder switch 2ZK include that normally closed auxiliary contact 2Z1 and normally opened auxiliary are touched With operating handle QK first group of contact, D.C. contactor after point 2Z2, normally closed auxiliary contact 1Z1 and normally closed auxiliary contact 2Z1 parallel connection Closing coil HQ, normally closed auxiliary contact D1 are followed in series to form closing circuit, normally opened auxiliary contact 1Z2 and normally opened auxiliary contact 2Z2 series connection after with second group of contact shunt of operating handle QK, so successively with D.C. contactor breaking coil TQ, normally opened auxiliary contact D2 sub-gate circuits in series.