CN209329687U - A kind of traction substation emergency protection system - Google Patents

A kind of traction substation emergency protection system Download PDF

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Publication number
CN209329687U
CN209329687U CN201822072151.4U CN201822072151U CN209329687U CN 209329687 U CN209329687 U CN 209329687U CN 201822072151 U CN201822072151 U CN 201822072151U CN 209329687 U CN209329687 U CN 209329687U
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China
Prior art keywords
relay
emergency
circuit
protection
signal
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CN201822072151.4U
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Chinese (zh)
Inventor
严牧君
潘仁秋
洪丽强
马力
高宇膺
梁小奇
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NR Electric Co Ltd
NR Engineering Co Ltd
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NR Electric Co Ltd
NR Engineering Co Ltd
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Priority to CN201822072151.4U priority Critical patent/CN209329687U/en
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Abstract

The utility model provides a kind of traction substation emergency protection system.The system is suitable for the occupied situation of opening coil that traction substation has main transformer high-pressure side breaker, the system comprises: emergency protecting equipment controls emergency protection circuit operation according to emergency protection signal;The emergency protection circuit disconnects the existing circuit of the opening coil under the control of the emergency protecting equipment, forms new protection circuit with the opening coil.The utility model is suitable for existing traction substation and has the opening coil of main transformer high-pressure side breaker only one or two occupied situations; traction substation can be kept quickly out of service in traction substation Control protection system irregular working; it avoids causing bigger secondary accident; and it can guarantee that emergency protection power supply and existing circuit will not get lines crossed; it keeps electric loop independent, can have traction substation by upgrading in the case where not influencing to have protection.

Description

A kind of traction substation emergency protection system
Technical field
The utility model relates to traction substation protection technique fields, and in particular to a kind of traction substation emergency protection system System.
Background technique
Traction substation is electric railway critical facility, is responsible for the electric energy of electric system to be changed into lead suitable for electric power The electric energy drawn is electric locomotive power supply by contact net.Traction substation failure will lead to contact net power loss, influence railway fortune It is defeated.
The Control protection system of traction substation is by each mutually independent protection such as tractive transformer protection, protection for feed line Device is constituted, and protective device and switchgear operation power supply are powered by DC power supply in traction substation.
Control protection system is the important equipment of traction substation, without spare, belongs to weak current equipment.Work as traction substation By being struck by lightning, high-voltage switch gear insulation breakdown, earthquake, fire, when D. C. power source breakdown, control protection in institute may be influenced The normal operation of system.
When Control protection system cisco unity malfunction, traction substation primary equipment will be made to be in a kind of no relay protection State, if traction transformer equipment continue to run, will have very high security risk because in the case once occur it is short The failures such as road, overload, breakers at different levels can not trip, and will jeopardize the person, equipment and system operational safety, under serious conditions The major accidents such as equipment is on fire can be caused.Therefore it should be given for serious consequence caused by Control protection system irregular working in institute It gives enough attention and develops a kind of method met an urgent need and remedied.
Utility model content
The utility model embodiment is designed to provide a kind of traction substation emergency protection system, is become with solving traction When electric institute's Control protection system irregular working it is caused institute in without relay protection the problem of.
The utility model embodiment provides a kind of traction substation emergency protection system, which is characterized in that the system Suitable for the occupied situation of opening coil that traction substation has main transformer high-pressure side breaker, the system comprises:
Emergency protecting equipment controls emergency protection circuit operation according to emergency protection signal;
The emergency protection circuit disconnects the existing electricity of the opening coil under the control of the emergency protecting equipment Road forms new protection circuit with the opening coil.
Further, the system also includes:
Power supply provides DC power supply for the emergency protecting equipment and the emergency protection circuit.
Further, the power supply further include:
Battery provides direct current after the power loss for the emergency protecting equipment and the emergency protection circuit Source.
Further, the emergency protection circuit includes:
Control relay circuit controls the actuating of relay under the control of the emergency protecting equipment;
Time-delay relay control circuit, under the control of the emergency protecting equipment, control time-delay relay movement;
Existing separating brake disconnecting circuit, disconnects the existing circuit of the opening coil;
Emergency protection opening circuit forms new protection circuit with the opening coil.
Further, the control relay circuit includes the first relay coil, the second relay coil, isolated from power Control relay normally open contact, first relay coil, the second relay parallel connection of coil after, be connected to the electricity Between one end of normal opened contact and the cathode of the power supply of source isolation control relay;
The time-delay relay control circuit includes tripping relay normal opened contact, time-delay relay coil, the tripping The normal opened contact of relay and the time-delay relay are connected in series between the anode and cathode of the power supply;
The existing separating brake disconnecting circuit includes the normally closed contact of first relay, the second relay, and described first Relay, the second relay normally closed contact it is in parallel after be connected in series in the existing circuit of the opening coil;
The emergency protection opening circuit include first relay, the second relay, time-delay relay first often Contact, the second normal opened contact are opened, the first normal opened contact series connection of first relay, the second relay, time-delay relay connects It connects in the anode of the power supply and one end of the opening coil;First relay, the second relay, time-delay relay Second normal opened contact is connected in series between the other end of the opening coil and the cathode of the power supply.
Further, the delay time of the time-delay relay is set according to the time that safely disconnects of the opening coil It sets.
Further, the emergency protecting equipment includes:
Signal acquisition unit, various signals needed for acquisition tripping;
Controller receives the signal of signal acquisition unit transmission, when the signal or the various signals When combination meets trip protection condition, output control signal controls the isolated from power control relay and the time-delay relay Movement.
Further, the signal acquisition unit includes:
Voltage relay, is arranged in every section of DC power supply bus of traction substation protection disk, and acquisition power loss signal is sent to The controller;
Current sensor, acquisition main transformer current signal are sent to the controller.
Further, the voltage relay corresponds at least one redundancy voltage relay, described two voltage relays It works at the same time, is electrically connected after contact series connection with the controller, acquisition power loss signal is sent to the controller.
Further, the signal acquisition unit further include:
Earthquake monitoring system, two groups of independent passive normal opened contacts are electrically connected after being connected in parallel with the controller, Monitoring seismic signal is sent to the controller;
Fire detector is electrically connected with the controller, and monitoring fire signal is sent to the controller.
The technical solution provided by the embodiments of the present invention is suitable for existing traction substation and has main transformer high pressure The opening coil of side breaker only one or two occupied situations, can traction substation Control protection system not Make traction substation quickly out of service when normal work, avoids causing bigger secondary accident, and can guarantee emergency protection Power supply and existing circuit will not get lines crossed, and keep electric loop independent, can upgrading has been in the case where not influencing to have protection There is traction substation, greatly improves the reliability of railways, the influence that the accident of reduction runs rail traction substation, And the upgrading economic cost and time cost of existing traction substation are reduced, ensures equipment operational safety and personnel's peace Entirely, fault spread is avoided.
Detailed description of the invention
It, below will be to required in embodiment description in order to illustrate more clearly of the technical scheme in the embodiment of the utility model Attached drawing to be used is briefly described, it should be apparent that, the accompanying drawings in the following description is only some realities of the utility model Example is applied, it for those of ordinary skill in the art, without creative efforts, can also be according to these attached drawings Obtain other attached drawings.
Fig. 1 is a kind of traction substation emergency protection circuit composition schematic diagram that an embodiment of the present invention provides;
Fig. 2 is a kind of traction substation emergency protecting equipment composition schematic diagram that an embodiment of the present invention provides;
Fig. 3 is a kind of power principle schematic diagram that an embodiment of the present invention provides.
Specific embodiment
To keep the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, below with reference to attached drawing and reality Example is applied, the specific embodiment progress of technical solutions of the utility model in further detail, is clearly illustrated.However, being described below Specific embodiment and embodiment be for illustrative purposes only, rather than limitations of the present invention.It only contains this Utility model a part of the embodiment, instead of all the embodiments, various changes of the those skilled in the art for the utility model Change the other embodiments obtained, fall within the protection scope of the utility model.
Although it should be understood that the first, second, third, etc. term can be used in this article be used to describe various elements or Component, but these elements or component should not be limited by these terms.These terms only to distinguish an element or component with Another element or component.Therefore, the first element or component of following the discussion, holds within the present invention not departing from, is referred to alternatively as Second element or the second component.
A kind of traction substation emergency protection system, has the separating brake of main transformer high-pressure side breaker suitable for traction substation The occupied situation of coil, system include emergency protecting equipment, emergency protection circuit.
Emergency protecting equipment controls emergency protection circuit operation according to emergency protection signal.Emergency protection circuit is protected in emergency Under the control of protection unit, the existing circuit of opening coil is disconnected, forms new protection circuit with opening coil.
System further includes power supply, provides DC power supply for emergency protecting equipment and emergency protection circuit.The power supply independently of Has DC power system in traction substation.
Fig. 1 is a kind of traction substation emergency protection circuit composition schematic diagram that an embodiment of the present invention provides, and is answered Anxious protection circuit includes control relay circuit, time-delay relay control circuit, existing separating brake disconnecting circuit, emergency protection separating brake Circuit.
As shown in Figure 1, the negative terminal of main transformer high-voltage circuit breaker brake cable circle TQ is normally closed by intermediate relay when operating normally Contact 1ZJ4 or 2ZJ4 is connect with original control power supply-KM, and anode passes through normally closed contact 1ZJ2 or 2ZJ2 and former protection sub-gate circuit Connection, emergency protecting equipment+KM ' by 1ZJ1,2ZJ1,3ZJ1 contact be isolated be segmented, emergency protection-KM ' by 1ZJ3,2ZJ3, The isolation segmentation of 2ZJ3 contact.
When emergency protection signal occurs, control relay circuit controls relay under the control of emergency protecting equipment Movement.Time-delay relay control circuit is under the control of emergency protecting equipment, control time-delay relay movement.Existing separating brake disconnects The existing circuit of circuit disconnection opening coil.Emergency protection opening circuit and opening coil form new protection circuit.
Control relay circuit include the first relay coil 1ZJ, the second relay coil 2ZJ, isolated from power control after Electric appliance normal opened contact 1KJ1.After first relay coil 1ZJ, the second relay coil 2ZJ are connected in parallel, it is connected to isolated from power It controls between one end of relay normally open contact 1KJ1 and the cathode-KM ' of power supply.
Time-delay relay control circuit includes tripping relay normal opened contact 1TJ1, time-delay relay coil 3ZJ.Tripping after Electric appliance normal opened contact 1TJ1 and time-delay relay coil 3ZJ are connected in series between the anode+KM ' of power supply and cathode-KM '.
Existing separating brake disconnecting circuit includes the first relay normally closed contact 1ZJ2, the second relay normally closed contact 2ZJ2.The The existing electricity of opening coil TQ is connected in series in after one relay normally closed contact 1ZJ2, the second relay normally closed contact 2ZJ2 are in parallel Lu Zhong.
Emergency protection opening circuit includes first the first normal opened contact of relay 1ZJ1, first the second normal opened contact of relay 1ZJ3, second the first normal opened contact of relay 2ZJ1, second the second normal opened contact of relay 2ZJ3, time-delay relay first are normally opened Contact 3ZJ1, the second normal opened contact of time-delay relay 3ZJ3.First the first normal opened contact of relay 1ZJ1, the second relay first Normal opened contact 2ZJ1, the first normal opened contact of time-delay relay 3ZJ1 are connected in series in the anode+KM's ' and opening coil TQ of power supply One end.First the second normal opened contact of relay 1ZJ3, second the second normal opened contact of relay 2ZJ3, time-delay relay second are normally opened Contact 3ZJ3 is connected in series between the other end of opening coil and the cathode-KM ' of power supply.
The delay time of time-delay relay 3ZJ is configured according to the time that safely disconnects of opening coil TQ.
When emergency protecting equipment protection act, it is dynamic that emergency protecting equipment controls isolated from power control relay 1KJ first Make, isolated from power controls relay normally open contact 1KJ1 closure, drives the first relay coil 1ZJ and the second relay coil 2ZJ disconnects 1ZJ2,1ZJ4,2ZJ2,2ZJ4 contact by electricity, and 1ZJ1,1ZJ3,2ZJ1,2ZJ3 closure guarantee breaker open operation Coil TQ is disconnected from original protection sub-gate circuit.
Then emergency protecting equipment control tripping relay coil 1TJ passes through deferred action, drives time-delay relay coil 3ZJ is made 3ZJ1,3ZJ3 junction closure by electricity, and breaker open operation coil is switched to emergency protecting equipment opening circuit at this time, is driven Dynamic opening coil realizes tripping.
It is occupied for having the breaker of only one opening coil or two opening coils in traction substation Breaker, the electrical isolation of emergency protection and former protective loop is realized by the design of this circuit, and substantially avoided transformation Former protective loop substantially increases the security reliability of the upgrading of existing traction substation.
Fig. 2 is a kind of traction substation emergency protecting equipment composition schematic diagram that an embodiment of the present invention provides, and is answered Anxious protective device includes signal acquisition unit, controller 21.
Various signals needed for signal acquisition unit acquisition tripping.Controller 21 receives the letter of signal acquisition unit transmission Number, when the combination of signal or various signals meets trip protection condition, output control signal control power supply isolation control relay Device 1KJ and tripping relay 1TJ movement.
Signal acquisition unit includes voltage relay YJ, current sensor TA.
Every section of DC power supply bus of traction substation protection disk is arranged in voltage relay YJ, and acquisition power loss signal is sent to Controller 21.Power loss signal is the main transformer protection disk DC bus and protection for feed line disk direct current of existing traction substation power-supply system Bus meets power loss condition simultaneously.Current sensor TA acquisition main transformer current signal is sent to controller 21.
Preferably, in order to avoid single relay failure leads to erroneous judgement, voltage relay YJ corresponds at least one redundancy Voltage relay, two voltage relays work at the same time monitoring busbar voltage, are electrically connected, adopt with controller 21 after contact series connection Collection power loss signal is sent to controller 21.In the case where being supplied using grouping ring, main transformer protection disk and protection for feed line disk are respectively set Power source bus, only emergency protecting equipment just will start after receiving the power loss signal of main transformer protection disk and protection for feed line disk simultaneously Emergency protecting equipment trip protection.
As a kind of optional scheme, signal acquisition unit can also include earthquake monitoring system 22, fire detector 23.
It is electrically connected after the independent passive normal opened contact of two groups of earthquake monitoring system 22 is connected in parallel with controller 21, prison Earthquake prediction signal is sent to controller 21.Fire detector 23 and controller 21 are electrically connected, and monitoring fire signal is sent to controller 21。
Emergency protecting equipment carries out comprehensive analysis and judgement to the signal input of acquisition, determines the movement item of emergency protecting equipment Part.Wherein, main criterion of the traction substation interior power power loss signal as emergency protecting equipment trip protection, voltage, electric current Signal can match signal as assistant criteria, seismic signal, fire signal conduct.
Power loss signal can be suitably used for the case where traction substation interruption maintenance, and artificially pulling down, existing protection system is straight When flowing bus power supply, emergency protecting equipment can voluntarily judge according to logic, and only alarm is not tripped.
Protection act includes the emergency protecting equipment tripping main transformer high-pressure side open circuit after meeting signal input condition criterion Device cuts off traction substation power supply.It is full for only one opening coil or the occupied breaker of two opening coils After foot protection trip condition, the emergency protecting equipment needs first to be isolated original protection sub-gate circuit, later could tripping open circuit Device cuts off traction substation power supply.
Fig. 3 is a kind of power principle schematic diagram that an embodiment of the present invention provides.As shown in figure 3, power supply include every From transformer 31, surge protector 32, rectification module 33, power supply supervision unit 34.Power supply cross flow tray out of traction substation draws Enter AC power source all the way, is converted into DC power supply by the isolation of isolating transformer 31 and then rectified module 33.Surge protection Device 32 and power supply supervision unit 34 are for being monitored and protecting to the working condition of power supply.
Preferably, power supply can also include battery 35.Battery 35 is emergency protecting equipment and institute after power loss It states emergency protection circuit and DC power supply is provided.35 capacity of battery is not less than 10Ah.
It should be noted that each embodiment above by reference to described in attached drawing is only to illustrate the utility model rather than limits The scope of the utility model processed, those skilled in the art should understand that, in the spirit and model for not departing from the utility model The modification or equivalent replacement carried out under the premise of enclosing to the utility model, should all cover within the scope of the utility model. In addition, signified outer unless the context, the word occurred in the singular includes plural form, and vice versa.In addition, except non-specifically Illustrate, then any embodiment all or part of in combination with any other embodiment all or part of come using.

Claims (8)

1. a kind of traction substation emergency protection system, which is characterized in that the system is suitable for traction substation and has main transformer The occupied situation of the opening coil of high-pressure side breaker, the system comprises:
Emergency protecting equipment controls emergency protection circuit operation according to emergency protection signal;
The emergency protection circuit disconnects the existing circuit of the opening coil under the control of the emergency protecting equipment, with The opening coil forms new protection circuit;
The emergency protection circuit includes:
Control relay circuit controls the actuating of relay under the control of the emergency protecting equipment;
Time-delay relay control circuit, under the control of the emergency protecting equipment, control time-delay relay movement, wherein institute The delay time for stating time-delay relay is configured according to the time that safely disconnects of the opening coil;
Existing separating brake disconnecting circuit, disconnects the existing circuit of the opening coil;
Emergency protection opening circuit forms new protection circuit with the opening coil.
2. system according to claim 1, which is characterized in that the system also includes:
Power supply provides DC power supply for the emergency protecting equipment and the emergency protection circuit.
3. system according to claim 2, which is characterized in that the power supply further include:
Battery provides DC power supply after the power loss for the emergency protecting equipment and the emergency protection circuit.
4. system according to claim 1, which is characterized in that
The control relay circuit is normal including the first relay coil, the second relay coil, isolated from power control relay Open contact, first relay coil, the second relay parallel connection of coil after, be connected to the isolated from power control after Between one end of the normal opened contact of electric appliance and the cathode of the power supply;
The time-delay relay control circuit includes tripping relay normal opened contact, time-delay relay coil, the tripping relay The normal opened contact of device and the time-delay relay are connected in series between the anode and cathode of the power supply;
The existing separating brake disconnecting circuit includes the normally closed contact of first relay, the second relay, first relay Device, the second relay normally closed contact it is in parallel after be connected in series in the existing circuit of the opening coil;
The emergency protection opening circuit includes that first relay, the second relay, time-delay relay first normally opened connect Point, the second normal opened contact, first relay, the second relay, time-delay relay the first normal opened contact be connected in series in The anode of the power supply and one end of the opening coil;First relay, the second relay, time-delay relay second Normal opened contact is connected in series between the other end of the opening coil and the cathode of the power supply.
5. system according to claim 4, which is characterized in that the emergency protecting equipment includes:
Signal acquisition unit, various signals needed for acquisition tripping;
Controller receives the signal of the signal acquisition unit transmission, when the combination of the signal or the various signals When meeting trip protection condition, output control signal controls the isolated from power control relay and the tripping relay is dynamic Make.
6. system according to claim 5, which is characterized in that the signal acquisition unit includes:
Voltage relay, is arranged in every section of DC power supply bus of traction substation protection disk, and acquisition power loss signal is sent to described Controller;
Current sensor, acquisition main transformer current signal are sent to the controller.
7. system according to claim 6, which is characterized in that the voltage relay correspond at least one redundancy voltage after Electric appliance, described two voltage relays work at the same time, and are electrically connected after contact series connection with the controller, and acquisition power loss signal is sent To the controller.
8. system according to claim 6 or 7, which is characterized in that the signal acquisition unit further include:
Earthquake monitoring system, two groups of independent passive normal opened contacts are electrically connected after being connected in parallel with the controller, monitoring Seismic signal is sent to the controller;
Fire detector is electrically connected with the controller, and monitoring fire signal is sent to the controller.
CN201822072151.4U 2018-12-11 2018-12-11 A kind of traction substation emergency protection system Active CN209329687U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201822072151.4U CN209329687U (en) 2018-12-11 2018-12-11 A kind of traction substation emergency protection system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201822072151.4U CN209329687U (en) 2018-12-11 2018-12-11 A kind of traction substation emergency protection system

Publications (1)

Publication Number Publication Date
CN209329687U true CN209329687U (en) 2019-08-30

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Application Number Title Priority Date Filing Date
CN201822072151.4U Active CN209329687U (en) 2018-12-11 2018-12-11 A kind of traction substation emergency protection system

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2022088260A1 (en) * 2020-10-26 2022-05-05 中车南京浦镇车辆有限公司 Rail vehicle bus bar circuit breaker control circuit

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2022088260A1 (en) * 2020-10-26 2022-05-05 中车南京浦镇车辆有限公司 Rail vehicle bus bar circuit breaker control circuit

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