CN207410016U - A kind of converter plant protective device - Google Patents
A kind of converter plant protective device Download PDFInfo
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- CN207410016U CN207410016U CN201721623917.2U CN201721623917U CN207410016U CN 207410016 U CN207410016 U CN 207410016U CN 201721623917 U CN201721623917 U CN 201721623917U CN 207410016 U CN207410016 U CN 207410016U
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- contactor
- auxiliary contact
- disconnecting switch
- controller
- contact
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Abstract
This application discloses a kind of converter plant protective devices; it is connected including controller with the output terminal of state-detection auxiliary contact collection; the input terminal of state-detection auxiliary contact collection is connected with positive pole; the output terminal of controller is connected by the control coil of disconnecting switch with power cathode; controller is connected with the inverter of main circuit, and controller is connected with voltage sensor；The utility model utilizes the state-detection auxiliary contact collection in control circuit to transmit main circuit breaker to controller in real time to controller, disconnecting switch, the working condition of the respective main contacts of charging contactor and short circuit contactor, enable control according to main circuit breaker, disconnecting switch, charging contactor and the respective auxiliary contact of short circuit contactor, judge whether the condition for meeting switch isolation switch, pass through voltage sensor and inverter again, complete the release to intermediate DC loop excess voltage, it is acted accordingly so as to fulfill in the control disconnecting switch for being capable of safety, improve security.
Description
Technical field
The utility model is related to automatic control technology field, more particularly to a kind of converter plant protective device.
Background technology
The converter plant of traditional shared intermediate loop is when occurring power module failure, due to all power modules just
Cathode is all connection, it is easy to cause the energy (power grid, motor, Support Capacitor and secondary capacitance) of electrical system all to failure
Module pours in, and module is caused to be damaged completely；Meanwhile module damage easilys lead to intermediate dc circuit short trouble, Zhi Nengtong
Cross the power module for blocking entire bogie, the power of a bogie will be lost at this time, it is therefore apparent that at this moment locomotive can
It is substantially reduced with property.Especially in shipping field, the above situation is at any time it is possible that can cause to be short of power or even machine is caused to break.Electricity
Dynamic disconnecting switch can power module break down cause DC loop short circuit when, by fault power module carry out electrical isolation,
Improve the availability of traction convertor.
Electric isolating switch is realized and separated between moving contact group, with static contact group by Automatic level control mode driving motor
The action of " dividing " and " conjunction " is realized with contact, due to the limitation of space and volume, electric isolating switch does not design arc-extinguish chamber generally,
In consideration of it, electric isolating switch can only safe voltage " point " performed below and " and " conversion.
When main circuit breaker is not fully disconnected；Or when traction electric machine also has remanent magnetism that energy " anti-to fill " is arrived unsteady flow by inverter
Device DC loop；Or intermediate loop Support Capacitor and secondary resonance capacitance storage energy do not consumed by copped wave resistance it is thorough
Bottom carries out electric isolating switch conversion, it may appear that main contact discharges, and then scaling loss when intermediate circuit voltage is more than safe voltage
Main contact.Therefore, before electric isolating switch conversion is carried out, main circuit breaker, charging contactor and short are ensured in control
Contactor is connect to be off；Intermediate dc loop voltage is less than safe voltage.
Meanwhile when converter plant some power module break down cause DC loop short circuit after, the fault power module
Isolated switch main contact head be in " dividing " position, and then achieve electrical excision, other do not have faulty power cell can be just
Often operation.In this case, if there are the unusual conditions such as instant power-down, crash in electric isolating switch controller, in " dividing " position
Isolated switch main contact head can malfunction, and DC loop voltage is normal working voltage at this time, is far longer than safe voltage, meeting
There is serious electric discharge, cause more catastrophe failure or even be present with safety problem.
In addition, converter device is certain to often power off in application process, since disconnecting switch control is using level type
Control, at the same when controller output port powers on can also be initialized, therefore what state is disconnecting switch be before no matter powering off,
After converter plant re-powers application, all disconnecting switch can all be initialised to the state of " conjunction ", if power-off before, have one weight every
Leave close be in disconnection state (the heavy disconnecting switch is off, and illustrates that the heavy power cell direct current has occurred
Serious short trouble), after re-powering, which can also be initialised to the state of " conjunction ", if at this time again on
High-voltage applications, failure can occur and very likely expand fault coverage again.
Therefore, how to provide a kind of safer converter plant protective device is current problem to be solved.
Utility model content
In view of this, the purpose of this utility model is to provide a kind of converter plant protective device, converter plant is improved
Degree of safety.Its concrete scheme is as follows：
A kind of converter plant protective device, including：Main circuit and control circuit, wherein；The control circuit includes control
Device, state-detection auxiliary contact collection, the control coil of disconnecting switch, voltage sensor；Wherein, the controller and the state
The output terminal of detection auxiliary contact collection is connected, and the input terminal of the state-detection auxiliary contact collection is connected with positive pole, described
The output terminal of controller is connected by the control coil of the disconnecting switch with power cathode, and the controller controls institute with being used for
The inverter for stating the main circuit of the copped wave conductive discharge of main circuit is connected, and the controller detects the main electricity with being used for
The voltage sensor of the intermediate circuit voltage in the intermediate dc circuit on road is connected；
Wherein, the auxiliary contact of the state-detection auxiliary contact collection including main circuit breaker, disconnecting switch auxiliary contact,
The auxiliary contact of charging contactor and the auxiliary contact of short circuit contactor.
Optionally, further include to work as the warning device that the controller is alarmed extremely.
Optionally, the auxiliary contact of the main circuit breaker include the normally closed auxiliary contact of the main circuit breaker and the master is broken
The normally opened auxiliary contact of road device.
Optionally, the auxiliary contact of the disconnecting switch include the normally closed auxiliary contact of the disconnecting switch and the isolation
The normally opened auxiliary contact of switch.
Optionally, the normally closed auxiliary contact of auxiliary contact of the short circuit contactor including the short circuit contactor and described
The normally opened auxiliary contact of short circuit contactor.
Optionally, the control circuit further includes charging contactor control circuit, the charging contactor control circuit bag
Include the control coil of the charging contactor, the normally closed auxiliary contact of the disconnecting switch, the short circuit contactor it is normally closed auxiliary
Help contact, the control coil of the short circuit contactor, the normally opened auxiliary contact of the charging contactor and the short circuit contactor
Normally opened auxiliary contact；Wherein, the input terminal of the control coil of the charging contactor is connected with the controller, the charging
The output terminal of the control coil of contactor, the normally closed auxiliary contact of the disconnecting switch, the normally closed auxiliary of the short circuit contactor
Contact and power cathode are sequentially connected in series, the normally opened auxiliary contact of the charging contactor and the normally opened auxiliary of the short circuit contactor
Contact shunt, the public input of the normally opened auxiliary contact of the charging contactor and the normally opened auxiliary contact of the short circuit contactor
End is connected with the controller, the normally opened auxiliary contact of the charging contactor and the normally opened auxiliary contact of the short circuit contactor
Public output be connected by the control coil of the short circuit contactor with power cathode；
Wherein, the main contacts of the disconnecting switch is normally-closed contact, the main contacts of the short circuit contactor and the charging
The main contacts of contactor is normally opened contact.
Optionally, the tool that the output terminal of the controller is connected by the control coil of the disconnecting switch with power cathode
Body connection relation enables circuit by disconnecting switch and is connected with power cathode for the output terminal of the controller, wherein, it is described every
It leaves and closes enabled control coil of the circuit including the disconnecting switch, control coil, the enabled contactor of enabled contactor
Normally-closed contact, the first normally opened contact and the second normally opened contact, the input terminal of the control coil of the enabled contactor with it is described
Controller is connected, and the output terminal of the control coil of the enabled contactor is connected with power cathode, the control of the disconnecting switch
The first input end of coil is connected with the controller, and the second input terminal of the control coil of the disconnecting switch is made by described
First normally opened contact of energy contactor is connected with positive pole, and the output terminal of the control coil of the disconnecting switch is made by described
Can the second normally opened contact of contactor be connected with power cathode, the normally-closed contact of the enabled contactor be connected to positive pole and
Between the controller.
Optionally, the charging contactor control circuit includes the control coil of the first charging contactor, the second charging
The control coil of tentaculum, the normally closed auxiliary contact of the first disconnecting switch, the normally closed auxiliary contact of the second disconnecting switch, the first short circuit
The normally closed auxiliary contact of contactor, the normally closed auxiliary contact of the second short circuit contactor, the control coil of the first short circuit contactor,
The control coil of two short circuit contactors, the normally opened auxiliary contact of the first charging contactor, the normally opened auxiliary of the second charging contactor
The normally opened auxiliary contact of contact, the normally opened auxiliary contact of the first short circuit contactor and the second short circuit contactor；Wherein, described first
The input terminal of the control coil of the control coil of charging contactor and second charging contactor respectively with the controller phase
Even, the output terminal of the control coil of first charging contactor, the normally closed auxiliary contact of first disconnecting switch, described the
The normally closed auxiliary contact and power cathode of one short circuit contactor are sequentially connected in series, the normally opened auxiliary contact of first charging contactor
In parallel with the normally opened auxiliary contact of first short circuit contactor and public input terminal is connected with the controller, public output
It is connected by the control coil of first short circuit contactor with power cathode, the control coil of second charging contactor
Output terminal, the normally closed auxiliary contact of second disconnecting switch, the normally closed auxiliary contact and power supply of second short circuit contactor
Cathode is sequentially connected in series, and the normally opened auxiliary of the normally opened auxiliary contact of second charging contactor and second short circuit contactor is touched
It puts in parallel and public input terminal with the controller to be connected, the control coil that public output passes through second short circuit contactor
It is connected with power cathode；
Wherein, the main contacts of first disconnecting switch and second disconnecting switch is normally-closed contact, and described first
Short circuit contactor, second short circuit contactor, the main contacts of first charging contactor and second charging contactor
It is normally opened contact.
Optionally, the disconnecting switch enables the control coil of circuit including the first disconnecting switch, the second disconnecting switch
Control coil, the control coil of enabled contactor, the normally-closed contact of enabled contactor, the first normally opened contact and second are normally opened tactile
Point；Wherein, the input terminal of the control coil of the enabled contactor is connected with the controller, the control of the enabled contactor
The output terminal of coil is connected with power cathode, and the first of the control coil of first disconnecting switch and second disconnecting switch
Input terminal is connected respectively with the controller, and the second of the control coil of first disconnecting switch and second disconnecting switch
Input terminal is connected by the first normally opened contact of the enabled contactor with positive pole, the control coil of the disconnecting switch
Output terminal be connected by the second normally opened contact of the enabled contactor with power cathode, the enabled contactor it is normally closed touch
Point is connected between positive pole and the controller.
Optionally, the controller is is stored and the control of detection function with the on off state to the disconnecting switch
Device processed.
In the utility model, converter plant protective device, including：Main circuit and control circuit, wherein；Control circuit includes
Controller, state-detection auxiliary contact collection, the control coil of disconnecting switch, voltage sensor；Wherein, controller and state-detection
The output terminal of auxiliary contact collection is connected, and the input terminal of state-detection auxiliary contact collection is connected with positive pole, the output of controller
End is connected by the control coil of disconnecting switch with power cathode, copped wave conductive discharge of the controller with being used to control main circuit
The inverter of main circuit is connected, the voltage of the intermediate circuit voltage in intermediate dc circuit of the controller with being used to detect main circuit
Sensor is connected；Wherein, state-detection auxiliary contact collection includes the auxiliary contact of main circuit breaker, the auxiliary of disconnecting switch is touched
The auxiliary contact of point, the auxiliary contact of charging contactor and short circuit contactor.
The utility model utilizes the state-detection auxiliary contact in control circuit by increasing control circuit in converter plant
Collect to controller and transmit main circuit breaker, disconnecting switch, charging contactor and short circuit contactor each main contacts to controller in real time
Working condition, enable control according to main circuit breaker, disconnecting switch, charging contactor and short circuit contactor it is respective auxiliary touch
Point judges whether the condition for meeting switch isolation switch, then by voltage sensor and inverter, completes to return intermediate dc
The release of road excess voltage, is further ensured that operational safety, so as to fulfill after converter plant breaks down or repairs, energy
The control disconnecting switch of enough safety is acted accordingly, improves security, it is ensured that disconnecting switch does not malfunction, after conversion not
There is secondary failure.
Description of the drawings
It in order to illustrate the embodiment of the utility model or the technical proposal in the existing technology more clearly, below will be to embodiment
Or attached drawing needed to be used in the description of the prior art is briefly described, it should be apparent that, the accompanying drawings in the following description is only
It is the embodiment of the utility model, for those of ordinary skill in the art, without creative efforts, also
Other attached drawings can be obtained according to the attached drawing of offer.
Fig. 1 is a kind of control circuit structural representation of converter plant protective device disclosed in the utility model embodiment；
Fig. 2 is that a kind of charging contactor controling circuit structure of control circuit disclosed in the utility model embodiment is illustrated
Figure；
Fig. 3 enables electrical block diagram for a kind of disconnecting switch of control circuit disclosed in the utility model embodiment；
Fig. 4 is a kind of main circuit structure schematic diagram of converter plant protective device disclosed in the utility model embodiment；
Fig. 5 is that a kind of state-detection auxiliary contact structure set of control circuit disclosed in the utility model embodiment is illustrated
Figure；
Fig. 6 is the controling circuit structure signal of another converter plant protective device disclosed in the utility model embodiment
Figure.
Specific embodiment
The following is a combination of the drawings in the embodiments of the present utility model, and the technical scheme in the embodiment of the utility model is carried out
It clearly and completely describes, it is clear that the described embodiments are only a part of the embodiments of the utility model rather than whole
Embodiment.Based on the embodiment in the utility model, those of ordinary skill in the art are without making creative work
All other embodiments obtained shall fall within the protection scope of the present invention.
The utility model embodiment discloses a kind of converter plant protective device, and shown in Figure 1, which includes：It is main
Circuit and control circuit 1, wherein；Control circuit 1 includes controller 11, state-detection auxiliary contact collection 12, the control of disconnecting switch
Coil 13 and voltage sensor 14 processed；Wherein, controller 11 is connected with the output terminal of state-detection auxiliary contact collection 12, state inspection
The input terminal for surveying auxiliary contact collection 12 is connected with positive pole, the control coil 13 that the output terminal of controller 11 passes through disconnecting switch
It is connected with power cathode, 15 phase of inverter of the main circuit of copped wave conductive discharge of the controller 11 with being used to control main circuit
Connect, the voltage sensor 14 of the intermediate circuit voltage in intermediate dc circuit of the controller 11 with being used to detect main circuit is connected；
Wherein, the auxiliary contact of state-detection auxiliary contact collection 12 including main circuit breaker, disconnecting switch auxiliary contact, fill
The auxiliary contact of electric contactor and the auxiliary contact of short circuit contactor.
It should be noted that state-detection auxiliary contact integrate 12 output terminal as main circuit breaker auxiliary contact, keep apart
The respective output terminal of auxiliary contact of the auxiliary contact of pass, the auxiliary contact of charging contactor and short circuit contactor, each auxiliary are touched
The output terminal of point is connected with 11 corresponding input terminal of controller, so that controller 11 can detect main circuit breaker, isolation respectively
The folding condition of the main contacts of switch, charging contactor and short circuit contactor, for example, the output terminal of the auxiliary contact of main circuit breaker
It is connected with 11 corresponding main circuit breaker test side of controller, so that the main contacts that controller 11 obtains main circuit breaker current is opened
Conjunction state, remaining auxiliary contact principle are identical.
Wherein, above-mentioned each auxiliary contact are all controlled with corresponding main contacts by same control coil, are synchronously acted, respectively
The original state of auxiliary contact and corresponding main contacts can be on the contrary, can also be identical, for example, the main contacts of main circuit breaker is normal
Contact is opened, the auxiliary contact of main circuit breaker can be normally opened contact or normally-closed contact, when the auxiliary contact of main circuit breaker
For normally-closed contact, then after controller 11 does not receive the electric signal inputted by the auxiliary contact of main circuit breaker, illustrate main open circuit
Device is closed, and after controller 11 receives the electric signal inputted by the auxiliary contact of main circuit breaker, illustrates that main circuit breaker disconnects, when
The auxiliary contact of main circuit breaker are normally opened contact, then controller 11 does not receive the electricity inputted by the auxiliary contact of main circuit breaker
After signal, illustrate that main circuit breaker disconnects, after controller 11 receives the electric signal inputted by the auxiliary contact of main circuit breaker, say
Bright main circuit breaker is closed, and therefore, the original state of auxiliary contact can be selected according to practical situations, remaining auxiliary contact
Original state setting principle is identical.
Specifically, controller 11 in real time detection disconnecting switch whether have point request or and request, if having point request or with ask
It asks, by the auxiliary contact of main circuit breaker, whether input electrical signal detects main circuit breaker state to controller 11, if main circuit breaker does not have
There is disconnection, continue waiting for, if main circuit breaker has disconnected, then whether input electrical signal is examined by the auxiliary contact of charging contactor
Charging contactor state is surveyed, if charging contactor is not turned off, continues waiting for, if charging contactor has disconnected, continues through short
Connect contactor auxiliary contact whether input electrical signal detection short circuit contactor state, if short circuit contactor is not turned off, continue
It waits, if short circuit contactor has disconnected, the voltage being passed to eventually by the voltage sensor 14 being connected with intermediate dc circuit is believed
Number, judge whether intermediate dc loop voltage is less than safe voltage, if intermediate dc loop voltage is controlled still greater than safe voltage
Device 11 processed controls the inverter 15 being attached thereto that copped wave resistance is controlled to open electric discharge, by the extra energy of intermediate loop by cutting
Ripple resistance is bled off, if intermediate dc loop voltage is less than safe voltage, controller 11 sends disconnecting switch point order, exports telecommunications
Number to disconnecting switch control coil 13, disconnect disconnecting switch, complete the separation to disconnecting switch.
It is powered it is understood that controller 11 possesses independent power supply, the control logic in controller 11 also may be used
With with being changed according to the practical situations of auxiliary contact, so as to complete main circuit breaker, disconnecting switch, charging contactor and short
The interlocking between contactor is connect, ensures the security of main circuit；Main circuit is main contacts, the traction voltage transformation for including main circuit breaker
Device, precharge and short circuit module, PWM fairings, disconnecting switch, intermediate dc circuit, copped wave resistance and inverter 15 are used
In the main circuit of unsteady flow.
As it can be seen that the utility model embodiment utilizes the shape in control circuit 1 by increasing control circuit 1 in converter plant
State detection auxiliary contact collection 12 to controller 11 in real time to controller 11 transmit main circuit breaker, disconnecting switch, charging contactor and
The working condition of the respective main contacts of short circuit contactor enables control according to main circuit breaker, disconnecting switch, charging contactor and short
The respective auxiliary contact of contactor are connect, judge whether to meet the condition of switch isolation switch, then pass through voltage sensor 14 and inverse
Become device 15, complete the release to intermediate DC loop excess voltage, be further ensured that operational safety, filled so as to fulfill in unsteady flow
It puts after breaking down or repairing, the control disconnecting switch for being capable of safety is acted accordingly, improves security, it is ensured that every
It leaves pass not malfunction, does not occur secondary failure after conversion.
It should be noted that the auxiliary contact that state-detection auxiliary contact collection 12 includes in the embodiment of the present invention can root
Change accordingly according to such as change of disconnecting switch, charging contactor and short circuit contactor quantity in main circuit, not only limit to
In one, the auxiliary contact such as multiple disconnecting switch, similarly, the control coil of disconnecting switch in the embodiment of the present invention can be included
13 can also be changed according to the quantity of disconnecting switch in main circuit, not limit herein.
The utility model embodiment discloses a kind of specific converter plant protective device, compared with a upper embodiment, sheet
Embodiment has made further instruction and optimization to technical solution.It is shown in Figure 2, specifically：
In the utility model embodiment, in order to further ensure after the main contacts disconnection of disconnecting switch, to can ensure that
Charging contactor and short circuit contactor are not closed, realize on hardware and software on carry out duplicate protection, control circuit can be with
Including charging contactor control circuit, charging contactor control circuit includes the control coil 22 of charging contactor, disconnecting switch
Normally closed auxiliary contact QS, normally closed auxiliary contact KM1a, control coil 23, the charge contact of short circuit contactor of short circuit contactor
The normally opened auxiliary contact KM2 of the device and normally opened auxiliary contact KM1b of short circuit contactor；Wherein, the control coil 22 of charging contactor
Input terminal be connected with controller 21, output terminal, the normally closed auxiliary contact of disconnecting switch of the control coil 22 of charging contactor
QS, the normally closed auxiliary contact KM1a of short circuit contactor and power cathode are sequentially connected in series, the normally opened auxiliary contact KM2 of charging contactor
It is in parallel with the normally opened auxiliary contact KM1b of short circuit contactor, the normally opened auxiliary contact KM2 of charging contactor and short circuit contactor
The public input terminal of normally opened auxiliary contact KM1b is connected with controller 21, the normally opened auxiliary contact KM2 and short circuit of charging contactor
The public output of the normally opened auxiliary contact KM1b of contactor is connected by the control coil 23 of short circuit contactor with power cathode；
Wherein, the main contacts of disconnecting switch is normally-closed contact, and the main contacts of short circuit contactor and the main contacts of charging contactor are normal
Open contact.
Specifically, only when the main contacts of disconnecting switch and the main contacts of short circuit contactor are original state, i.e. isolation
The normally closed auxiliary contact QS of switch and the normally-closed contact of short circuit contactor are closure state, and controller 21 can just send charging
Tentaculum closes order to the coil of charging contactor, so that the normally opened auxiliary contact KM2 of charging contactor is closed, charging contactor
Normally opened main contacts be closed, simultaneously as charging contactor normally opened auxiliary contact KM2 be closed, if necessary to short circuit contactor
It is closed, controller 21 can also send an electrical signal to the control of short circuit contactor by the normally opened auxiliary contact KM2 of charging contactor
Coil 23, so that the normally opened main contacts of short circuit contactor and normally opened auxiliary contact are closed, normally closed auxiliary contact disconnects, and short circuit connects
The control coil 23 of tentaculum receives the electric signal of controller 21 by the normally opened auxiliary contact KM1b of short circuit contactor, because, it is short
The normally closed auxiliary contact KM1a for connecing contactor is disconnected, 22 dead electricity of control coil of charging contactor, the normally opened master of charging contactor
Contact restPoses, and disconnects, so as to ensure, in the case where disconnecting switch is not closed, short circuit contactor is closed, to fill
Electric contactor can not be closed, and ensure that the safety of converter plant.
It should be noted that the control coil of the charging contactor in the embodiment of the present invention in charging contactor control circuit
22nd, the normally closed auxiliary contact QS of disconnecting switch, the normally closed auxiliary contact KM1a of short circuit contactor, the control coil of short circuit contactor
23rd, the quantity of the normally opened auxiliary contact KM1b of the normally opened auxiliary contact KM2 and short circuit contactor of charging contactor can be according to reality
Border application demand is changed, and connection relation and principle are identical with foregoing teachings, can be multiplexed, herein not to each number of devices into
Row limits.
Further, it is abnormal to prevent controller from occurring, and security risk is caused, increase is connected to work as institute with controller
State the warning device that controller is alarmed extremely, warning device detects the working condition of controller, if there is exception, then into
Row alarm, for example, the type of alarms such as warning light or buzzing alarm remind related personnel to be safeguarded.
The utility model embodiment also discloses a kind of converter plant protective device, and shown in Figure 3, which includes：
In the utility model embodiment, in the case that exception occurs in controller 31 in order to prevent, controller 31 can not be sent
In the case of control command, the main contacts of disconnecting switch can be disconnected, so as to ensure that disconnecting switch does not malfunction, previous embodiment
The output terminal of middle controller noted above 31 is by the specific connection relation that the control coil 32 of disconnecting switch is connected with power cathode
The output terminal of controller 31 enables circuit by disconnecting switch and is connected with power cathode, wherein, disconnecting switch, which enables circuit, to be included
It is the control coil 32 of disconnecting switch, the control coil 33 of enabled contactor, the normally-closed contact KEN3 of enabled contactor, first normally opened
Contact KEN1 and the second normally opened contact KEN2, the input terminal of the control coil 33 of enabled contactor are connected with controller 31, enable
The output terminal of the control coil 33 of contactor is connected with power cathode, the first input end of the control coil 32 of disconnecting switch and control
Device 31 processed is connected, the second input terminal of the control coil 32 of disconnecting switch by enable the first normally opened contact KEN1 of contactor with
Positive pole is connected, and the output terminal of the control coil 32 of disconnecting switch passes through the second normally opened contact KEN2 and electricity of enabled contactor
Source cathode is connected, and the normally-closed contact KEN3 of enabled contactor is connected between positive pole and controller 31.
Specifically, only work as the control coil that controller 31 outputs enable signal to enabled contactor by enabling output terminal
After 33, enable contactor control coil 33 it is electric, control the first normally opened contact KEN1 and second of enabled contactor is normally opened to touch
Point KEN2 is closed, and makes the control coil 32 of disconnecting switch must be electric, the control coil 32 of disconnecting switch is enable to receive controller 31
The control signal of output is acted accordingly, and the normally-closed contact KEN3 for enabling contactor is disconnected, and is awarded controller 31 and is enabled shape
State is fed back, at this point, controller 31 sends control signal according to practical application request to the control coil 32 of disconnecting switch, makes isolation
Switch is acted accordingly, when controller 31 crash or suddenly power down or power panel occur to interrupt and restart (converter plant with
Disconnecting switch is powered non-power down), since controller 31 does not send enable signal, no matter control line from controller 31 to disconnecting switch
The order that circle 32 is sent is any state, and disconnecting switch will not all respond, even if more than occurring when disconnecting switch acts
31 abnormal phenomenon of controller, since each contactor at this time is all in off-state, intermediate dc loop voltage also below
Medium voltage, will not scaling loss disconnecting switch converter plant will not be damaged, so disconnecting switch is prevented to malfunction.
It should be noted that in the embodiment of the present invention disconnecting switch enable the disconnecting switch in circuit control coil 32,
The control coil 33 of enabled contactor, normally-closed contact KEN3, the first normally opened contact KEN1 and second of enabled contactor are normally opened tactile
The quantity of point KEN2 can be changed according to practical application request, and connection relation and principle are identical with foregoing teachings, Ke Yifu
With not being defined herein to each number of devices.
In the embodiment of the present invention, controller can also carry out the on off state of disconnecting switch power down storage, isolate every time
After switch conversion, the on off state of disconnecting switch is carried out real-time storage by controller, and power-off is not wiped, and controller powers on every time
Afterwards, the on off state of disconnecting switch will be detected, and reads the on off state stored after power down, the two carries out Comprehensive Correlation, such as
Fruit is the same, system worked well, if abnormal, quotes failure or prompt message.
The utility model embodiment also discloses another converter plant protective device, which includes：
It is shown in Figure 4, the main circuit of the converter plant protective device of the utility model embodiment include main circuit breaker 1,
Tractive transformer 2, precharge and short unit 3, PWM fairings 4, electric isolating switch 5, intermediate dc circuit 6, copped wave electricity
7 and VVVF inverters 8 are hindered, wherein, precharge and short unit include the main contacts KM1 of the first short circuit contactor, second short
The main contacts KM4 of the main contacts KM2 of contactor, the main contacts KM3 of the first charging contactor and the second charging contactor are met, it is electronic
Disconnecting switch includes main contacts QS1, the main contacts QS2 of the second disconnecting switch of the first disconnecting switch.
It is shown in Figure 5, on the basis of main circuit shown in Fig. 4, the converter plant protective device of the utility model embodiment
The auxiliary contact of state-detection auxiliary contact collection including the first short circuit contactor of control circuit, the second short circuit contactor it is auxiliary
Help contact, the auxiliary contact KM3 of the first charging contactor, the auxiliary contact KM4 of the second charging contactor, the first disconnecting switch
The auxiliary contact of auxiliary contact and the second disconnecting switch, wherein, state-detection auxiliary contact concentrate the auxiliary contact of main circuit breaker
It can include the normally closed auxiliary contact VCB1 of main circuit breaker and the normally opened auxiliary contact VCB2 of main circuit breaker, the first disconnecting switch
Auxiliary contact can include the normally closed auxiliary contact QS11 of the first disconnecting switch and the normally opened auxiliary contact of the first disconnecting switch
QS12, the auxiliary contact of the second disconnecting switch can keep apart including the normally closed auxiliary contact QS21 and second of the first disconnecting switch
The normally opened auxiliary contact QS22 closed, the auxiliary contact of the first short circuit contactor can include the normally closed auxiliary of the first short circuit contactor
The normally opened auxiliary contact KM12 of contact KM11 and the first short circuit contactor, the auxiliary contact of the second short circuit contactor can include the
The normally closed auxiliary contact KM21 of the two short circuit contactors and normally opened auxiliary contact KM22 of the second short circuit contactor, state-detection auxiliary
The auxiliary contact of main circuit breaker, disconnecting switch and short circuit contactor use normally closed auxiliary contact and normally opened auxiliary contact in set of contacts
It is applied in combination, an auxiliary contact are used to represent the original state of corresponding main contacts, another auxiliary contact is used to represent corresponding
The operating state of main contacts, for example, the normally closed auxiliary contact VCB1 of main circuit breaker is used to represent the normally opened main contacts of main circuit breaker
Original state, i.e. off-state, the normally opened auxiliary contact VCB2 of main circuit breaker are used to represent the normally opened main contacts of main circuit breaker
Operating state, i.e. closure state, if controller 51 is only capable of receiving the normally closed auxiliary contact VCB1 inputs of main circuit breaker
Electric signal then illustrates that the normally opened main contacts of main circuit breaker is in original state i.e. off-state, if controller 51 is only capable of receiving
The electric signal inputted to the normally opened auxiliary contact VCB2 of main circuit breaker then illustrates that the normally opened main contacts of main circuit breaker is in action shape
State, that is, closure state, state-detection auxiliary contact concentrate auxiliary contact to make using normally closed auxiliary contact and the combination of normally opened auxiliary contact
With, when can avoid using an auxiliary contact, the erroneous judgement caused by due to auxiliary contact failure to main contacts working condition.
Shown in Figure 6, on the basis of main circuit shown in Fig. 4, the utility model embodiment discloses a kind of corresponding control
Circuit processed, including：Controller 51, voltage sensor 52, the inverter 53 of main circuit, charging contactor control circuit 54, every
Leave the enabled circuit 55 in pass and state-detection auxiliary contact collection 56 as shown in Figure 5.
Specifically, charging contactor control circuit includes control coil 21, the second charge contact of the first charging contactor
The control coil 22 of device, the normally closed auxiliary contact QS1 of the first disconnecting switch, the normally closed auxiliary contact QS2 of the second disconnecting switch,
The normally closed auxiliary contact KM1a of one short circuit contactor, the normally closed auxiliary contact KM1b of the second short circuit contactor, the first shorting contact
The control coil 23 of device, the control coil 24 of the second short circuit contactor, the normally opened auxiliary contact KM3 of the first charging contactor,
The normally opened auxiliary contact KM4 of two charging contactors, the normally opened auxiliary contact KM1b of the first short circuit contactor and the second shorting contact
The normally opened auxiliary contact KM2b of device；Wherein, the control coil of first charging contactor and second charging contactor
The input terminal of control coil is connected respectively with the controller, the output terminal of the control coil of first charging contactor, institute
The normally closed auxiliary contact of the first disconnecting switch, the normally closed auxiliary contact of first short circuit contactor and power cathode is stated to go here and there successively
The normally opened auxiliary contact of connection, the normally opened auxiliary contact of first charging contactor and first short circuit contactor are in parallel, the
The public input terminal and institute of the normally opened auxiliary contact of one charging contactor and the normally opened auxiliary contact of first short circuit contactor
Controller is stated to be connected, the normally opened auxiliary contact of the normally opened auxiliary contact of the first charging contactor and first short circuit contactor
Public output is connected by the control coil of first short circuit contactor with power cathode, second charging contactor
The output terminal of control coil, the normally closed auxiliary contact of second disconnecting switch, the normally closed auxiliary of second short circuit contactor
Contact and power cathode are sequentially connected in series, the normally opened auxiliary contact of second charging contactor and second short circuit contactor
Normally opened auxiliary contact are in parallel, and the normally opened auxiliary of the normally opened auxiliary contact of the second charging contactor and second short circuit contactor is touched
The public input terminal of point is connected with the controller, the normally opened auxiliary contact of the second charging contactor and second shorting contact
The public output of the normally opened auxiliary contact of device is connected by the control coil of second short circuit contactor with power cathode；Institute
The main contacts for stating the first disconnecting switch and second disconnecting switch is normally-closed contact, first short circuit contactor, described
The main contacts of second short circuit contactor, first charging contactor and second charging contactor is normally opened contact.
Specifically, disconnecting switch enables the control that circuit includes the control coil 31, the second disconnecting switch of the first disconnecting switch
Coil 32 processed, the control coil 33 of enabled contactor, normally-closed contact KEN3, the first normally opened contact KEN1 of enabled contactor and the
Two normally opened contact KEN2；Wherein, the input terminal of the control coil of the enabled contactor is connected with the controller, described enabled
The output terminal of the control coil of contactor is connected with power cathode, the control of first disconnecting switch and second disconnecting switch
The first input end of coil processed is connected respectively with the controller, the control of first disconnecting switch and second disconnecting switch
Second input terminal of coil processed is connected by the first normally opened contact of the enabled contactor with positive pole, described to keep apart
The output terminal of the control coil of pass is connected by the second normally opened contact of the enabled contactor with power cathode, and described enable connects
The normally-closed contact of tentaculum is connected between positive pole and the controller.
It is understood that controller and the connection of different auxiliary contact use different receiving terminals, each receiving terminal with
Auxiliary contact correspond, and using corresponding programmed logic, reflect the corresponding difference of each auxiliary contact different conditions exactly
Meaning, similarly, controller also include multiple output terminals, each output terminal also with the control coil that is connected, auxiliary contact or circuit
It is corresponding, using corresponding programmed logic, corresponding electric signal is exported, enables the controller to accurately realize to disconnecting switch control
System strategy.
The foregoing description of the disclosed embodiments enables those skilled in the art to realize or using the utility model.
A variety of modifications of these embodiments will be apparent for a person skilled in the art, general original as defined herein
Reason can be realized in other embodiments without departing from the spirit or scope of the present utility model.Therefore, this practicality is new
Type is not intended to be limited to the embodiments shown herein, and is to fit to and the principles and novel features disclosed herein phase
Consistent most wide scope.
Claims (10)
1. a kind of converter plant protective device, which is characterized in that including：Main circuit and control circuit, wherein；The control circuit
Including controller, state-detection auxiliary contact collection, the control coil of disconnecting switch, voltage sensor；Wherein, the controller with
The output terminal of the state-detection auxiliary contact collection is connected, input terminal and the positive pole phase of the state-detection auxiliary contact collection
Even, the output terminal of the controller is connected by the control coil of the disconnecting switch with power cathode, and the controller is with using
It is connected in the inverter of the main circuit for the copped wave conductive discharge for controlling the main circuit, the controller is detected with being used for
The voltage sensor of the intermediate circuit voltage in the intermediate dc circuit of the main circuit is connected；
Wherein, the state-detection auxiliary contact collection includes the auxiliary contact of main circuit breaker, the auxiliary contact of disconnecting switch, charging
The auxiliary contact of contactor and the auxiliary contact of short circuit contactor.
2. converter plant protective device according to claim 1, which is characterized in that further include and be mutually used in conjunction with the controller
In the warning device alarmed extremely when the controller.
3. converter plant protective device according to claim 1, which is characterized in that the auxiliary contact bag of the main circuit breaker
Include the normally closed auxiliary contact of the main circuit breaker and the normally opened auxiliary contact of the main circuit breaker.
4. converter plant protective device according to claim 2, which is characterized in that the auxiliary contact bag of the disconnecting switch
Include the normally closed auxiliary contact of the disconnecting switch and the normally opened auxiliary contact of the disconnecting switch.
5. converter plant protective device according to claim 3, which is characterized in that the auxiliary contact of the short circuit contactor
The normally opened auxiliary contact of normally closed auxiliary contact and the short circuit contactor including the short circuit contactor.
6. converter plant protective device according to any one of claims 1 to 5, which is characterized in that the control circuit is also
Including charging contactor control circuit, the charging contactor control circuit includes the control coil of the charging contactor, institute
State the normally closed auxiliary contact of disconnecting switch, the normally closed auxiliary contact of the short circuit contactor, the control line of the short circuit contactor
The normally opened auxiliary contact of circle, the normally opened auxiliary contact of the charging contactor and the short circuit contactor；Wherein, the charging
The input terminal of the control coil of tentaculum is connected with the controller, the output terminal of the control coil of the charging contactor, described
The normally closed auxiliary contact of disconnecting switch, the normally closed auxiliary contact of the short circuit contactor and power cathode are sequentially connected in series, described to fill
The normally opened auxiliary contact of electric contactor and the normally opened auxiliary contact of the short circuit contactor are in parallel, the charging contactor it is normally opened
The public input terminal of auxiliary contact and the normally opened auxiliary contact of the short circuit contactor is connected with the controller, the charging
The public output of the normally opened auxiliary contact of tentaculum and the normally opened auxiliary contact of the short circuit contactor passes through the shorting contact
The control coil of device is connected with power cathode；
Wherein, the main contacts of the disconnecting switch is normally-closed contact, the main contacts of the short circuit contactor and the charge contact
The main contacts of device is normally opened contact.
7. converter plant protective device according to any one of claims 1 to 5, which is characterized in that the controller it is defeated
The specific connection relation that outlet is connected by the control coil of the disconnecting switch with power cathode is the output of the controller
End enables circuit by disconnecting switch and is connected with power cathode, wherein, the disconnecting switch, which enables circuit, includes described keep apart
The control coil of pass, the enabled control coil of contactor, the normally-closed contact of the enabled contactor, the first normally opened contact and second
Normally opened contact, the input terminal of the control coil of the enabled contactor are connected with the controller, the control of the enabled contactor
The output terminal of coil processed is connected with power cathode, the first input end of the control coil of the disconnecting switch and the controller phase
Even, the second input terminal of the control coil of the disconnecting switch by the first normally opened contact of the enabled contactor with power supply just
Extremely it is connected, the output terminal of the control coil of the disconnecting switch is born by the second normally opened contact of the enabled contactor with power supply
Extremely it is connected, the normally-closed contact of the enabled contactor is connected between positive pole and the controller.
8. converter plant protective device according to claim 6, which is characterized in that the charging contactor control circuit bag
The control coil of the first charging contactor, the control coil of the second charging contactor, the normally closed auxiliary of the first disconnecting switch is included to touch
Point, the normally closed auxiliary contact of the second disconnecting switch, the normally closed auxiliary contact of the first short circuit contactor, the second short circuit contactor it is normal
Close auxiliary contact, the control coil of the first short circuit contactor, the control coil of the second short circuit contactor, first charging contactor
Normally opened auxiliary contact, the normally opened auxiliary contact of the second charging contactor, the normally opened auxiliary contact and second of the first short circuit contactor
The normally opened auxiliary contact of short circuit contactor；Wherein, the control coil of first charging contactor and second charge contact
The input terminal of the control coil of device is connected respectively with the controller, the output of the control coil of first charging contactor
End, the normally closed auxiliary contact of first disconnecting switch, the normally closed auxiliary contact and power cathode of first short circuit contactor
It is sequentially connected in series, the normally opened auxiliary contact of the normally opened auxiliary contact of first charging contactor and first short circuit contactor are simultaneously
Join and public input terminal is connected with the controller, public output passes through the control coil and electricity of first short circuit contactor
Source cathode is connected, and the output terminal of the control coil of second charging contactor, the normally closed auxiliary of second disconnecting switch are touched
Point, the normally closed auxiliary contact of second short circuit contactor and power cathode are sequentially connected in series, second charging contactor it is normal
It is in parallel and public input terminal is connected with the controller to open the normally opened auxiliary contact of auxiliary contact and second short circuit contactor,
Public output is connected by the control coil of second short circuit contactor with power cathode；
Wherein, the main contacts of first disconnecting switch and second disconnecting switch is normally-closed contact, first short circuit
Contactor, second short circuit contactor, the main contacts of first charging contactor and second charging contactor are
Normally opened contact.
9. converter plant protective device according to claim 7, which is characterized in that the disconnecting switch, which enables circuit, to be included
The control coil of first disconnecting switch, the control coil of the second disconnecting switch, the control coil of enabled contactor, enabled contactor
Normally-closed contact, the first normally opened contact and the second normally opened contact；Wherein, the input terminal of the control coil of the enabled contactor with
The controller is connected, and the output terminal of the control coil of the enabled contactor is connected with power cathode, and described first keeps apart
It closes and the first input end of the control coil of second disconnecting switch is connected respectively with the controller, described first keeps apart
It closes and the second input terminal of the control coil of second disconnecting switch passes through the first normally opened contact of the enabled contactor
It is connected with positive pole, the second normally opened contact that the output terminal of the control coil of the disconnecting switch passes through the enabled contactor
It is connected with power cathode, the normally-closed contact of the enabled contactor is connected between positive pole and the controller.
10. converter plant protective device according to claim 7, which is characterized in that the controller is with to described
The on off state of disconnecting switch carries out the controller of storage and detection function.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721623917.2U CN207410016U (en) | 2017-11-28 | 2017-11-28 | A kind of converter plant protective device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721623917.2U CN207410016U (en) | 2017-11-28 | 2017-11-28 | A kind of converter plant protective device |
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| CN207410016U true CN207410016U (en) | 2018-05-25 |
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| CN201721623917.2U Active CN207410016U (en) | 2017-11-28 | 2017-11-28 | A kind of converter plant protective device |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111077440A (en) * | 2018-10-19 | 2020-04-28 | 株洲中车时代电气股份有限公司 | Traction converter and method, device and equipment for detecting state of contactor of traction converter |
| CN111863529A (en) * | 2019-06-17 | 2020-10-30 | 李正庭 | Electricity-saving contactor |
-
2017
- 2017-11-28 CN CN201721623917.2U patent/CN207410016U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111077440A (en) * | 2018-10-19 | 2020-04-28 | 株洲中车时代电气股份有限公司 | Traction converter and method, device and equipment for detecting state of contactor of traction converter |
| CN111863529A (en) * | 2019-06-17 | 2020-10-30 | 李正庭 | Electricity-saving contactor |
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