CN210137479U

CN210137479U - Complete emergency lighting system for substation

Info

Publication number: CN210137479U
Application number: CN201920989837.1U
Authority: CN
Inventors: 骆建营; 田旭东; 王青玉; 闵祥晟; 许继轲; 苏成宾; 徐作升
Original assignee: Yanzhou Coal Industry Co Ltd
Current assignee: Yanzhou Coal Mining Co Ltd; Yanzhou Coal Industry Co Ltd
Priority date: 2019-06-27
Filing date: 2019-06-27
Publication date: 2020-03-10
Anticipated expiration: 2029-06-27

Abstract

The utility model discloses a complete set of emergency lighting system of transformer substation, including three-phase four-wire AC line and the direct current screen of transformer substation normal lighting power supply, the module input that charges in the direct current screen is connected with three-phase four-wire AC line, the module output that charges is connected with two-phase direct current line, battery and emergency lamp have parallelly connected on the two-phase direct current line, through the main contact control circuit break-make of accident contactor between emergency lamp and the two-phase direct current line, link to each other in proper order between the positive pole circuit of two-phase direct current line, the contact of accident auxiliary relay, the coil of accident contactor and the negative pole line connection of two-phase direct current line, the coil of accident auxiliary relay is connected with three-phase four-wire AC line; the utility model discloses three-phase four-wire AC power supply loses the electricity, and normal illumination does not have in the electric substation, and the system should be able to drop into emergency lighting lamp source immediately this moment, and when the three-phase four-wire AC power supply incoming telegram, normal illumination resumes in the electric substation, and the system should be able to amputate emergency lighting immediately this moment.

Description

Complete emergency lighting system for substation

Technical Field

The utility model relates to a colliery power supply neighborhood specifically is a complete set emergency lighting system of electric substation.

Background

The power supply of the coal mine is crucial to the safety production of the coal mine, and the whole coal mine production system is paralyzed due to the power supply accident, so that the safety of the coal mine and the personnel are seriously threatened. The safe operation of the ground substation plays an important role in the whole power system, and operators on duty in the substation often encounter various abnormal phenomena or accidents in the duty process, so that the operators on duty are very important to correctly and timely process. If the power supply accident causes the transformer to trip, the 35kV transformer station does not have illumination, and particularly if the accident occurs at night, great difficulty is brought to the processing of the fault and the recovery of a power supply system, so that the time for processing the accident is prolonged, and even the influence range of the accident is enlarged. Therefore, the emergency lighting system of the substation plays a very important role in the safe operation of the substation.

The emergency lighting lamp of the existing product has the problems of difficult installation, insufficient brightness, difficult test, higher price and the like, is frequently damaged and is not suitable for being used in a substation. In order to be able to meet the requirements of field use, the emergency lighting system is specially designed.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a complete set emergency lighting system of electric substation, as required, emergency lighting lamp is as emergency lighting, and separately with normal light, only promptly uses under the condition of normal illumination power loss, can realize throwing automatically, cuts, and the power supply accident appears in the electric substation, when causing no illumination, through emergency lighting, in time quick processing trouble shortens the fault time, reduces economic loss.

The purpose of the utility model can be realized by the following technical scheme:

a complete set of emergency lighting system for substation comprises a three-phase four-wire AC line and a DC screen, wherein the three-phase four-wire AC line is used for normal lighting and power supply of a transformer station and comprises an A phase line, a B phase line, a C phase line and an N line.

And the two-phase direct current circuit is connected with a storage battery and an emergency lamp in parallel, and the emergency lamp and the two-phase direct current circuit are controlled to be switched on and off through a main contact of the accident contactor.

And the positive line of the two-phase direct current line is connected with a contact of an accident intermediate relay, the contact of the accident intermediate relay is connected with a coil of the accident contactor in series, and one end of the coil of the accident contactor is connected with the negative line of the two-phase direct current line.

And two ends of a coil of the accident intermediate relay are respectively connected with any two phases of the A phase, the B phase and the C phase of the three-phase four-wire alternating current circuit.

Further, the emergency light fixture includes a plurality of emergency lights connected in parallel.

Further, a direct current converter is connected in series between the two-phase direct current line and the emergency lamp.

Furthermore, an experiment button is connected between a coil of the accident intermediate relay and the three-phase four-wire alternating-current circuit in series, and the on-off of the circuit between the coil of the accident intermediate relay and the three-phase four-wire alternating-current circuit is controlled through the experiment button.

Furthermore, fuses are connected between the positive pole of the storage battery and the positive pole line of the two-phase direct current line and between the negative pole of the storage battery and the negative pole line of the two-phase direct current line, and the fuses play a role in protecting the storage battery.

Furthermore, the two-phase direct current circuit and the storage battery are both connected with a voltmeter in parallel, the positive pole and the negative pole of the voltmeter are both connected with fuses in series, and the fuses play a role in protecting voltage.

Furthermore, fuses are connected in series between the two-phase direct current line and the contact of the accident intermediate relay and between the coil of the accident contactor and the two-phase direct current line, and the fuses respectively play a role in protecting the contact of the accident intermediate relay and the coil of the accident contactor.

Furthermore, fuses are connected in series between the coil of the accident intermediate relay and the three-phase four-wire alternating-current circuit and between the experiment button and the three-phase four-wire alternating-current circuit, and the fuses respectively play a role in protecting the coil of the accident intermediate relay and the experiment button.

Furthermore, a voltage reduction device is connected in series on the positive pole line of the two-phase direct current line between the two-phase direct current line and the emergency lamp, and the voltage reduction device has the function of stabilizing the voltage of the two-phase direct current line.

The utility model has the advantages that:

1. the utility model discloses satisfy automatic throwing, the function of cutting, promptly: when the three-phase four-wire alternating current power supply is powered on and normal illumination in the substation is recovered, the system can immediately cut off the emergency illumination;

2. the utility model carries out overload, leakage and short circuit protection to the three-phase four-wire AC line through the first three-phase switch Q1 and the second three-phase switch Q2;

3. the utility model utilizes the monitoring unit in the DC screen to monitor the voltage and the charging and discharging current of the storage battery in real time, automatically controls the storage battery to be charged and float charged, and has the functions of overvoltage, undervoltage, overtemperature alarm, fault alarm and the like;

4. the utility model adopts DC24V for the voltage of the emergency lamp, and DC220V lamp manufacturers are few and expensive, so that the DC24V lamp is adopted to reduce the cost;

5. the utility model discloses set up test button, whether inspection emergency lighting system's switching is normal.

Drawings

The present invention will be further described with reference to the accompanying drawings.

Fig. 1 is a schematic diagram of the circuit structure of the present invention.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by a person of ordinary skill in the art without creative efforts belong to the protection scope of the present invention.

In the description of the present invention, it is to be understood that the terms "open hole", "upper", "lower", "thickness", "top", "middle", "length", "inner", "around", and the like, indicate positional or positional relationships, are merely for convenience in describing the present invention and to simplify the description, and do not indicate or imply that the components or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore should not be construed as limiting the present invention.

As shown in fig. 1, the complete emergency lighting system for the substation includes a 380V three-phase four-wire ac line and a dc screen, where the three-phase four-wire ac line is powered by the normal lighting of the substation, the three-phase four-wire ac line includes an a phase line, a B phase line, a C phase line and an N line, an input end of a charging module M in the dc screen is connected with the a phase line, the B phase line and the C phase line of the three-phase four-wire ac line respectively, and a positive electrode and a negative electrode of an output end of the charging module M are connected with a.

And the two-phase direct current circuit is connected with a storage battery E and an emergency lamp HL in parallel in sequence, wherein the type of the storage battery E is storage battery DC 220V.

The emergency lamp HL and the two-phase direct current line are controlled to be switched on and off through a main contact of the accident contactor KM, and the emergency lamp HL comprises a plurality of emergency lamps which are connected in parallel.

When the intelligent charging device is used, 380V three-phase four-wire alternating current line alternating current is converted into 220V direct current through the charging module M, the storage battery E is charged through the charging module M, the type of the charging module M is Emerson HD22005, the voltage and the charging and discharging current of the storage battery E are monitored in real time through the monitoring unit JK in the direct current screen, the storage battery E is automatically controlled to be uniformly charged and float charged, and the intelligent charging device has the functions of overvoltage, undervoltage, overtemperature alarm, fault alarm and the like.

A direct current converter is connected in series between the two-phase direct current circuit and the emergency lamp HL, the type of the direct current converter is 220V/24V, the number of direct current 220V lamp manufacturers is small, the price is high, the direct current converter is used for converting 220V stable voltage of the two-phase direct current circuit into 24V stable voltage, and the emergency lamp HL is a DC24V lamp, so that the cost is reduced.

The positive line of the two-phase direct current line is connected with a contact of an accident intermediate relay KA, the contact of the accident intermediate relay KA is connected with a coil of the accident contactor KM in series, and one end of the coil of the accident contactor KM is connected with the negative line of the two-phase direct current line.

Two ends of a coil of the accident intermediate relay KA are respectively connected with any two phases of the A phase, the B phase and the C phase of the three-phase four-wire alternating current circuit.

Whether intact for the convenience of later stage test emergency lighting device's switching performance, install experiment button SB between accident intermediate relay KA's coil and three-phase four-wire AC line, through experiment button SB control accident intermediate relay KA's coil and three-phase four-wire AC line between the circuit break-make, under the normal condition, experiment button SB is the closed condition, and at this moment, the circuit is in the connected state between accident intermediate relay KA's coil and the three-phase four-wire AC line.

When an alternating current power supply of the three-phase four-wire alternating current line is normal, a coil of an accident intermediate relay KA of 380V alternating current is electrified, a contact of the accident intermediate relay KA is disconnected, the coil of an accident contactor KM is not electrified at the moment, a main contact of the accident contactor KM is disconnected, a broken circuit is formed between an emergency lamp HL and the two-phase direct current line, and the emergency lamp HL is not bright.

When the alternating current power supply of the three-phase four-wire alternating current circuit disappears, the coil of the accident intermediate relay KA of 380V alternating current is powered off, the contact of the accident intermediate relay KA is closed, the storage battery E energizes the coil of the accident contactor KM through the two-phase direct current circuit, at the moment, the main contact of the accident contactor KM is closed, a channel is formed between the emergency lamp HL and the two-phase direct current circuit, the storage battery E supplies power to the emergency lamp HL through the two-phase direct current circuit, and the emergency lamp HL shines to play an emergency lighting role.

When the alternating current power supply of the three-phase four-wire alternating current line is recovered to be normal, normal lighting in the substation is recovered, the coil of the accident intermediate relay KA is electrified to cause the contact of the accident intermediate relay KA to be disconnected, the coil of the accident contactor KM is not electrified at the moment, the main contact of the accident contactor KM is disconnected, a broken circuit is formed between the emergency lamp HL and the two-phase direct current line, the emergency lamp HL does not shine, and the effect of saving the power supply is achieved.

When the emergency device is used for testing whether the switching performance of the emergency device for emergency lighting is good, the experiment button SB is pressed down to enable the experiment button SB to be in an off mode, the coil of the emergency intermediate relay KA is powered off, the main contact of the emergency contactor KM is closed, a channel is formed between the emergency lamp HL and the two-phase direct-current line, the storage battery E directly supplies power to the emergency lamp HL through the two-phase direct-current line through the DC220V/DC24V direct-current converter, if the emergency device for emergency lighting is used for testing the switching performance of the emergency device for emergency lighting is good, the emergency lamp HL shines, and if the emergency device for emergency lighting is used for testing the switching performance damage of the emergency.

The three-phase four-wire alternating current line is controlled to be switched on and off by the first three-phase switch Q1 and the second three-phase switch Q2, under a normal state, the first three-phase switch Q1 and the second three-phase switch Q2 are both in a closed state, the first three-phase switch Q1 and the second three-phase switch Q2 are both three-phase air switches, and overload, electric leakage and short-circuit protection is performed on the three-phase four-wire alternating current line by the aid of the three-phase air switches with overload, electric leakage and short-circuit protection functions.

The three-phase four-wire alternating current line is provided with the lightning arrester F in parallel, and the lightning arrester F is used for avoiding lightning stroke of the three-phase four-wire alternating current line.

The charging module M and the two-phase direct current line are connected and disconnected through a first two-phase switch Q3, and in a normal state, a first two-phase switch Q3 is in a closed state.

The circuit is controlled by a second two-phase switch Q4 between the battery E and the two-phase dc line, and in a normal state, the second two-phase switch Q4 is in a closed state.

The fuse FU is connected between the positive electrode circuit of the storage battery E and the positive electrode circuit of the two-phase direct current circuit and between the negative electrode circuit of the storage battery E and the negative electrode circuit of the two-phase direct current circuit, and the fuse FU plays a role in protecting the storage battery E.

Voltmeter PV is connected in parallel on the two-phase direct current circuit and the storage battery E, and voltmeter PV measures the voltage at two ends of the two-phase direct current circuit and the storage battery E respectively, and fuse FU is connected in series on the positive and negative poles of voltmeter PV, and fuse FU plays a role in protecting voltmeter PV.

Fuse FU is respectively connected in series between the two-phase direct current circuit and the contact of the accident intermediate relay KA and between the coil of the accident contactor KM and the two-phase direct current circuit, and the fuse FU respectively plays a role in protecting the contact of the accident intermediate relay KA and the coil of the accident contactor KM.

Fuse FU is all established ties between the coil of above-mentioned accident auxiliary relay KA and the three-phase four-wire AC line and between experiment button SB and the three-phase four-wire AC line, and fuse FU plays the guard action to the coil of accident auxiliary relay KA and experiment button SB respectively.

The two-phase direct current circuit between the two-phase direct current circuit and the emergency lamp HL is connected with the voltage reduction device SCR in series, and the voltage reduction device SCR is a voltage regulator and has the function of stabilizing the voltage of the two-phase direct current circuit.

In the description herein, references to the description of "one embodiment," "an example," "a specific example," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

The foregoing shows and describes the general principles, essential features, and advantages of the invention. It will be understood by those skilled in the art that the present invention is not limited to the above embodiments, and that the foregoing embodiments and descriptions are provided only to illustrate the principles of the present invention without departing from the spirit and scope of the present invention.

Claims

1. A complete set of emergency lighting system for a substation comprises a three-phase four-wire alternating current circuit and a direct current screen, wherein the three-phase four-wire alternating current circuit is used for normal lighting and power supply of a transformer station and comprises an A phase line, a B phase line, a C phase line and an N line;

the two-phase direct current circuit is connected with a storage battery (E) and an emergency lamp (HL) in parallel, and the emergency lamp (HL) and the two-phase direct current circuit are controlled to be switched on and off through a main contact of an accident contactor (KM);

the positive line of the two-phase direct current line is connected with a contact of an accident intermediate relay (KA), the contact of the accident intermediate relay (KA) is connected with a coil of an accident contactor (KM) in series, and one end of the coil of the accident contactor (KM) is connected with a negative line of the two-phase direct current line;

and two ends of a coil of the accident intermediate relay (KA) are respectively connected with any two phases of the A phase, the B phase and the C phase of the three-phase four-wire alternating current circuit.

2. A substation set of emergency lighting system according to claim 1, wherein the emergency light fixture (HL) comprises a plurality of emergency lights connected in parallel.

3. A substation complete set of emergency lighting system according to claim 1, characterized in that a dc converter is connected in series between said two-phase dc line and the emergency light (HL).

4. A substation set emergency lighting system according to claim 1, characterized in that an experiment button (SB) is connected in series between the coil of the emergency relay (KA) and the three-phase four-wire ac line, and the circuit between the coil of the emergency relay (KA) and the three-phase four-wire ac line is controlled by the experiment button (SB).

5. A substation complete set of emergency lighting system according to claim 1, characterized in that Fuses (FU) are connected between the positive pole of the battery (E) and the positive pole line of the two-phase dc line, and between the negative pole of the battery (E) and the negative pole line of the two-phase dc line, and the Fuses (FU) protect the battery (E).

6. The complete set of emergency lighting system for transformer substations as claimed in claim 1, wherein the two-phase direct current line and the storage battery (E) are both connected in parallel with a voltmeter PV, the positive and negative poles of the voltmeter PV are both connected in series with Fuses (FU), and the Fuses (FU) protect the voltmeter PV.

7. A substation set of emergency lighting system according to claim 1, wherein a Fuse (FU) is connected in series between the two-phase dc line and the contact of the emergency relay (KA), and between the coil of the emergency contactor (KM) and the two-phase dc line, and the Fuse (FU) protects the contact of the emergency relay (KA) and the coil of the emergency contactor (KM), respectively.

8. A substation set of emergency lighting system according to claim 1, wherein Fuses (FU) are connected in series between the coil of the emergency relay (KA) and the three-phase four-wire ac line and between the experiment button (SB) and the three-phase four-wire ac line, the Fuses (FU) respectively protecting the coil of the emergency relay (KA) and the experiment button (SB).

9. A complete set of emergency lighting system for substation according to claim 1, wherein a voltage reduction device (SCR) is connected in series to the positive line of the two-phase direct current line between the two-phase direct current line and the emergency lamp (HL), and the voltage reduction device (SCR) has a function of stabilizing the voltage of the two-phase direct current line.