CN102879669B - Failure current simulation device and working method thereof - Google Patents

Failure current simulation device and working method thereof Download PDF

Info

Publication number
CN102879669B
CN102879669B CN201210344171.7A CN201210344171A CN102879669B CN 102879669 B CN102879669 B CN 102879669B CN 201210344171 A CN201210344171 A CN 201210344171A CN 102879669 B CN102879669 B CN 102879669B
Authority
CN
China
Prior art keywords
gate
controlled switch
controller
switch
test coil
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Active
Application number
CN201210344171.7A
Other languages
Chinese (zh)
Other versions
CN102879669A (en
Inventor
郭彦伟
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Aerospace Science and Industry Shenzhen Group Co Ltd
Original Assignee
Aerospace Science and Industry Shenzhen Group Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Aerospace Science and Industry Shenzhen Group Co Ltd filed Critical Aerospace Science and Industry Shenzhen Group Co Ltd
Priority to CN201210344171.7A priority Critical patent/CN102879669B/en
Publication of CN102879669A publication Critical patent/CN102879669A/en
Application granted granted Critical
Publication of CN102879669B publication Critical patent/CN102879669B/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Landscapes

  • Control Of Electric Motors In General (AREA)
  • Testing Of Short-Circuits, Discontinuities, Leakage, Or Incorrect Line Connections (AREA)

Abstract

The invention provides a failure current simulation device, which comprises a current generator, a first controllable switch, a second controllable switch, a third controllable switch, a test coil, a sliding rheostat, a direct current power supply, a master controller, an electronic counter, a first switch controller, a second switch controller and a third switch controller, wherein an AC end of the current generator is respectively connected with a sliding sheet of the sliding rheostat and one end of the third controllable switch; the other end of the third controllable switch is connected with one end of the test coil; the other end of the test coil is connected with an NC end of the current generator; one end of a resistance wire of the sliding rheostat is connected with one end of the first controllable switch; the other end of the resistance wire is connected with one end of the second controllable switch; the other end of the first controllable switch and the other rend of the second controllable switch are respectively connected with the NC end of the current generator; and the first switch controller, the second switch controller and the third switch controller are electrically connected with the electronic counter through the master controller and the direct current power supply respectively. The failure current simulation device is easy to operate and can comprehensively test a product to be tested.

Description

Failure current simulation device and method of work thereof
Technical field
The invention belongs to analogue simulation field, particularly relate to a kind of failure current simulation device and method of work thereof.
Background technology
In the performance history of a lot of product, product is detected, be last one barrier ensureing whether product conforms with the regulations, can learn that whether developed product is qualified by relevant detection means.In the exploitation of some power product, the step detected is indispensable especially, need to determine that qualified rear just can the attaching it in electric system of described power product various performance parameters carries out work by detecting, if underproof power product to be carried out in electric system the words used, light then the fault that causes power failure, heavy then cause great electric power accident even personnel casualty accidents.
At present, a lot of power products of Utilities Electric Co.'s exploitation are installed in electric system, for monitoring the current fault conditions in electric system, as power products such as fault detectors, be installed in described electric system, for monitoring the fault current in electric system, before this kind of product export, detection and the test of the simulation of some fault currents can be done it, determine that whether it is qualified.Existing usually relay-protection tester is used to the instrument that this series products carries out fault current simulation test; and the expense buying a relay-protection tester is higher; the operation simultaneously exporting fault current is cumbersome; test process expends time in oversize; oversize words easily caused equipment heating thus burnt out equipment working time; bring the waste of cost, and the testing time to product can not be shown in test process, be unfavorable for recording the data of product test process and analyzing.
Summary of the invention
The present invention is intended to carry out fault current simulation test troublesome poeration to power product in solution prior art, test duration is long, cost is high, the technical matters of testing time can not be shown, a kind of failure current simulation device is provided, can realize the simulation of fault current, device is simple to operate, and whole test process can the testing time of record trouble electric current.
The invention provides a kind of failure current simulation device, this failure current simulation device comprises:
Current feedback circuit, first gate-controlled switch, second gate-controlled switch, 3rd gate-controlled switch, test coil and slide rheostat, the AC end of current feedback circuit is connected with the slide plate of slide rheostat and one end of the 3rd gate-controlled switch respectively, the other end of the 3rd gate-controlled switch is connected with one end of test coil, the other end of test coil is held with the NC of current feedback circuit and is connected, one end of slide rheostat resistance wire is connected with one end of the first gate-controlled switch, the other end of resistance wire is connected with one end of the second gate-controlled switch, the other end of the first gate-controlled switch and the second gate-controlled switch is held with the NC of electrical power generator respectively and is connected,
This failure current simulation device also comprises direct supply, master controller, the first on-off controller, second switch controller, the 3rd on-off controller and electronic counter, and the first on-off controller, second switch controller, the 3rd on-off controller and electronic counter are electrically connected with direct supply respectively by master controller;
First on-off controller, for controlling the open and close of the first switch under the control of master controller;
Second switch controller, for controlling the open and close of second switch under the control of master controller;
3rd on-off controller, for controlling the open and close of the 3rd switch under the control of master controller;
Electronic counter, for record trouble current analog cycle times under the control of master controller;
Master controller, for operating to described first on-off controller, second switch controller and the 3rd on-off controller switching electricity by controlling direct supply, periodically property controls the open and close of the first gate-controlled switch, the second gate-controlled switch and the 3rd gate-controlled switch, and when the control completing one-period, control the counting increase of electronic counter once.
Preferably, the process controlling the first gate-controlled switch, the second gate-controlled switch and the 3rd gate-controlled switch open and close in described one-period comprises following pattern:
Pattern one: the first gate-controlled switch, the 3rd gate-controlled switch are in closure state, and the second gate-controlled switch is in off-state, the electric current flow through in test coil
Pattern two: the first gate-controlled switch, the second gate-controlled switch are in off-state, and the 3rd gate-controlled switch is in closure state, the electric current I flow through in test coil c=I;
Pattern three: the three gate-controlled switch is in off-state, the electric current I flow through in test coil c=0;
Wherein, I is the electric current that current feedback circuit sends, and R is the resistance in slide rheostat place in circuit, R cfor the resistance of test coil.
Preferably, described first gate-controlled switch, the second gate-controlled switch and the 3rd gate-controlled switch are electromagnetic relay, and the first on-off controller, second switch controller and the 3rd on-off controller are respectively solenoid.
The present invention also provides a kind of failure current simulation device, and this failure current simulation device comprises:
Current feedback circuit, first gate-controlled switch, second gate-controlled switch, 3rd gate-controlled switch, test coil and slide rheostat, the AC end of current feedback circuit is connected with the slide plate of slide rheostat and one end of the 3rd gate-controlled switch respectively, the other end of the 3rd gate-controlled switch is connected with one end of test coil, the other end of test coil is held with the NC of current feedback circuit and is connected, one end of slide rheostat resistance wire is connected with one end of the first gate-controlled switch, the other end of resistance wire is connected with one end of the second gate-controlled switch, the other end of the first gate-controlled switch and the second gate-controlled switch is held with the NC of current feedback circuit respectively and is connected,
This failure current simulation device also comprises direct supply, the 4th gate-controlled switch, the first on-off controller, second switch controller, the 3rd on-off controller, the 4th on-off controller and electronic counter, and the first on-off controller, second switch controller, the 3rd on-off controller and electronic counter are electrically connected with direct supply respectively by the 4th gate-controlled switch;
4th on-off controller is directly electrically connected with direct supply, for controlling the open and close of the 4th switch;
First on-off controller, for controlling the open and close of the first switch;
Second switch controller, for controlling the open and close of second switch;
3rd on-off controller, for controlling the open and close of the 3rd switch;
Electronic counter, for the quasi periodic number of times of record trouble current-mode;
Wherein, by controlling four on-off controllers different working time, periodically control the open and close of the first gate-controlled switch, the second gate-controlled switch, the 3rd gate-controlled switch and the 4th gate-controlled switch, and when the control completing one-period, control the counting increase of electronic counter once.
Preferably, the process controlling the first gate-controlled switch, the second gate-controlled switch, the 3rd gate-controlled switch and the 4th gate-controlled switch open and close in described one-period comprises following pattern:
Pattern one: the first gate-controlled switch, the 3rd gate-controlled switch and the 4th gate-controlled switch are in closure state, and the second gate-controlled switch is in off-state, the electric current flow through in test coil
Pattern two: the second gate-controlled switch, the 3rd gate-controlled switch and the 4th gate-controlled switch are in closure state, and the first gate-controlled switch is in off-state and to adjust the operating resistance of slide rheostat place in circuit maximum, the electric current I flow through in test coil c'=I';
Pattern three: the first gate-controlled switch, the second gate-controlled switch and the 3rd gate-controlled switch are in off-state, and the 4th gate-controlled switch is in closure state, the electric current I flow through in test coil c'=0;
Pattern four: the four gate-controlled switch is in off-state;
Wherein, I' is the electric current that current feedback circuit sends, and R' is the resistance in slide rheostat place in circuit, R c' be the resistance of test coil.
Preferably, described first gate-controlled switch, the second gate-controlled switch, the 3rd gate-controlled switch and the 4th gate-controlled switch are A.C. contactor, first gate-controlled switch and the second gate-controlled switch are normal open switch, 3rd gate-controlled switch and the 4th gate-controlled switch are normally closed switch, and the first on-off controller, second switch controller, the 3rd on-off controller and the 4th on-off controller are respectively even numbers and show tester.
The present invention also provides a kind of method of work of failure current simulation device, described failure current simulation device comprises current feedback circuit, first gate-controlled switch, second gate-controlled switch, 3rd gate-controlled switch, test coil and slide rheostat, the AC end of current feedback circuit is connected with the slide plate of slide rheostat and one end of the 3rd gate-controlled switch respectively, the other end of the 3rd gate-controlled switch is connected with one end of test coil, the other end of test coil is held with the NC of current feedback circuit and is connected, one end of slide rheostat resistance wire is connected with one end of the first gate-controlled switch, the other end of resistance wire is connected with one end of the second gate-controlled switch, the other end of the first gate-controlled switch and the second gate-controlled switch is held with the NC of current feedback circuit respectively and is connected,
This failure current simulation device also comprises direct supply, master controller, the first on-off controller, second switch controller, the 3rd on-off controller and electronic counter, and the first on-off controller, second switch controller, the 3rd on-off controller and electronic counter are electrically connected with direct supply respectively by master controller;
Described method of work comprises the following steps:
Step S100, it is that electronic counter is powered and the clearing that resets that master controller controls direct supply;
Step S200, master controller controls the first gate-controlled switch and the 3rd gate-controlled switch closes simultaneously, and the second gate-controlled switch disconnects, the electric current flow through in test coil the fault current produced is and continue preset time t 1;
Step S300, master controller controls the first gate-controlled switch, the second gate-controlled switch disconnects, and the 3rd gate-controlled switch closes, the electric current I flow through in test coil c=I, the fault current of generation is I*N, and continues preset time t 2;
Step S400, master controller controls the 3rd gate-controlled switch and disconnects, the electric current I flow through in test coil c=0, the fault current of generation is 0, and continues preset time t 3;
Step S500, master controller controls the counting increase of electronic counter once, and judges whether the counting of electronic counter reaches preset value, and if so, step terminates; As no, return step S200;
Wherein, I is the electric current that current feedback circuit sends, and R is the resistance in slide rheostat place in circuit, R cfor the resistance of test coil, N is the number of turn of test coil.
Further, master controller controls the first gate-controlled switch, the second gate-controlled switch and the 3rd gate-controlled switch and to close or the method that disconnects is specially: master controller controls direct supply and is energized or power-off to the first on-off controller, second switch controller and the 3rd on-off controller;
The concrete grammar that master controller controls electronic counter counting and increases once is: master controller controls direct supply and stops power supply to electronic counter, and then controls again to power once to it.
The present invention also provides a kind of method of work of failure current simulation device, described failure current simulation device comprises current feedback circuit, first gate-controlled switch, second gate-controlled switch, 3rd gate-controlled switch, test coil and slide rheostat, the AC end of current feedback circuit is connected with the slide plate of slide rheostat and one end of the 3rd gate-controlled switch respectively, the other end of the 3rd gate-controlled switch is connected with one end of test coil, the other end of test coil is held with the NC of current feedback circuit and is connected, one end of slide rheostat resistance wire is connected with one end of the first gate-controlled switch, the other end of resistance wire is connected with one end of the second gate-controlled switch, the other end of the first gate-controlled switch and the second gate-controlled switch is held with the NC of electrical power generator respectively and is connected,
This failure current simulation device also comprises direct supply, the 4th gate-controlled switch, the first on-off controller, second switch controller, the 3rd on-off controller, the 4th on-off controller and electronic counter, first on-off controller, second switch controller, the 3rd on-off controller and electronic counter are electrically connected with direct supply respectively by the 4th switch, 4th on-off controller is directly electrically connected with direct supply, first gate-controlled switch and the second gate-controlled switch are normal open switch, and the 3rd gate-controlled switch and the 4th gate-controlled switch are normally closed switch;
Described method of work comprises the following steps:
Step S100 ', electronic counter resets and resets;
Step S200 ', controls the first on-off controller work and runs preset time t 1, the electric current flow through in test coil the fault current produced is
Step S300 ', controls the first on-off controller and quits work, and the work of second switch controller also runs preset time t 2, and the operating resistance adjusting slide rheostat place in circuit is maximum, the electric current I flow through in test coil c'=I', the fault current of generation is I'*N;
Step S400 ', control second switch controller and quit work, the 3rd on-off controller work also runs preset time t 3, the electric current I flow through in test coil c'=0, the fault current of generation is 0;
Step S500 ', controls that the 3rd on-off controller quits work, the 4th on-off controller work quitting work after running preset time t 4, and judges whether the counting of electronic counter reaches preset value, and if so, step terminates; As no, return step S200 ';
Wherein, I' is the electric current that current feedback circuit sends, and R' is the resistance in slide rheostat place in circuit, R c' be the resistance of test coil, N is the number of turn of test coil.
Further, described first gate-controlled switch, the second gate-controlled switch, the 3rd gate-controlled switch and the 4th gate-controlled switch are A.C. contactor, and the first on-off controller, second switch controller, the 3rd on-off controller and the 4th on-off controller are respectively even numbers and show tester.
The above technical scheme, pass through gate-controlled switch, test coil, slide rheostat, current feedback circuit, the electronic devices and components such as electronic counter form a failure simulation device, and by periodically controlling opening of gate-controlled switch, close the simulation realizing flowing through the fault current of test coil, and realize the counting to its fault current cycle index by electronic counter, add the intuitive of the test data in product test process, whole failure current simulation device uses existing electronic devices and components to form, with low cost, and it is simple to operate, facilitate control test products being carried out to fault simulation testing time simultaneously, advantageously in carrying out full test to required product to be measured.
Accompanying drawing explanation
Fig. 1 is the structural representation of a kind of embodiment of failure current simulation device of the present invention;
Fig. 2 is the structural representation of failure current simulation device the second embodiment of the present invention;
Fig. 3 is the structural representation of the third embodiment of failure current simulation device of the present invention;
Fig. 4 is the method for work process flow diagram of a kind of embodiment of failure current simulation device of the present invention;
Fig. 5 is the method for work process flow diagram of the another kind of embodiment of failure current simulation device of the present invention.
Embodiment
In order to make technical matters solved by the invention, technical scheme and beneficial effect clearly understand, below in conjunction with drawings and Examples, the present invention is further elaborated.Should be appreciated that specific embodiment described herein only in order to explain the present invention, be not intended to limit the present invention.
As shown in Figure 1, show the failure current simulation device of an embodiment of the present invention, comprise current feedback circuit 300, this current feedback circuit 300 has AC and NC end, can be used for producing and export a certain size alternating current I, the AC end of current feedback circuit described here refers to the issuing side of the alternating current of current feedback circuit, and NC end refers to that the alternating current of current feedback circuit flows into end, refers generally to earth terminal.First gate-controlled switch 110, second gate-controlled switch 120, 3rd gate-controlled switch 130, test coil 600 and slide rheostat 500, the AC end of current feedback circuit 300 is connected with the slide plate A of slide rheostat 500 and one end of the 3rd gate-controlled switch 130 respectively, the other end of the 3rd gate-controlled switch 130 is connected with one end of test coil 600, the other end of test coil 600 is held with the NC of current feedback circuit and is connected, one end B of slide rheostat 500 resistance wire is connected with one end of the first gate-controlled switch 110, the other end C of resistance wire is connected with one end of the second gate-controlled switch 120, the other end of the first gate-controlled switch 110 and the second gate-controlled switch 120 is held with the NC of electrical power generator 300 respectively and is connected.
This failure current simulation device also comprises direct supply 700, master controller 800, first on-off controller 210, second switch controller 220, the 3rd on-off controller 230 and electronic counter 400, first on-off controller 210, second switch controller 220, the 3rd on-off controller 230 and electronic counter 400 and is electrically connected with direct supply 700 respectively by master controller 800;
First on-off controller 210, for controlling the open and close of the first switch 110 under the control of master controller 800;
Second switch controller 220, for controlling the open and close of second switch 120 under the control of master controller 800;
3rd on-off controller 230, for controlling the open and close of the 3rd switch 130 under the control of master controller 800;
Electronic counter 400, for the quasi periodic number of times of record trouble current-mode under the control of master controller 800;
Master controller 800, for operating to described first on-off controller 210, second switch controller 220 and the 3rd on-off controller 230 switching electricity by controlling direct supply 700, periodically control the open and close of the first gate-controlled switch 110, second gate-controlled switch 120 and the 3rd gate-controlled switch 130, and when the control completing one-period, control the counting increase of electronic counter 400 once.Test coil 600 is for simulated failure electric current, and the size of simulated failure electric current is: the number of turn flowing through the current value * test coil 600 of test coil 600.Test coil 600 is the installation position of product to be measured, if product to be measured is fault detector, directly fault detector is stuck on this test coil 600 and tests, if product to be measured is other power products, the installation of product to be measured can be carried out according to corresponding test specification.
In FIG, the AC end of current feedback circuit 300 is connected to the slide plate A of slide rheostat, one end of first gate-controlled switch 110 is connected with the B contact of slide rheostat resistance wire, the other end of the first gate-controlled switch 110 connects the NC end of described current feedback circuit 300, therefore, the AB section of current feedback circuit 300, slide rheostat and the first gate-controlled switch 110 form a loop; And one end of the second gate-controlled switch 120 is connected with the C contact of slide rheostat resistance wire, the other end of the second gate-controlled switch 120 connects the NC end of described current feedback circuit 300, and AC section and second gate-controlled switch 120 of current feedback circuit 300, slide rheostat form a loop; Equally, the AC end of current feedback circuit is connected to again one end of described 3rd gate-controlled switch 130, the other end of the 3rd gate-controlled switch 130 is connected with one end of test coil 600, the other end of test coil 600 is connected to the NC end of described current feedback circuit, like this, current feedback circuit 300, the 3rd gate-controlled switch 130 and test coil 600 form another loop.The connected mode of the above circuit is not limited to a kind of mode, and the components and parts in each loop can form other forms of circuit connecting mode by transposition each other, but substantial function and foregoing circuit are the same.
The counting display that master controller 800 can control electronic counter 400 changes, and the counting as controlled electronic counter 400 carries out reset and resets, or the counting controlling electronic counter 400 adds up to add 1.Preferably, controller 800 controls that direct supply 700 carries out being energized to described electronic counter 400, power operation, realizes the control to its counting.When failure current simulation device is started working, control direct supply 700 to power to described electronic counter 400, when failure current simulation device completes the fault current simulation of one-period, control direct supply 700 to stop powering to described electronic counter 400, control direct supply 700 when the cycle of then simulating at next fault current starts again to power to described electronic counter 400, because electronic counter 400 re-powers once, shown counting will increase once.
In above-described embodiment, described master controller 800 is for periodically controlling the open and close of the first gate-controlled switch 110, second gate-controlled switch 120 and the 3rd gate-controlled switch 130, and when the control completing one-period, control the counting increase of electronic counter 400 once.Above scheme, by controlling the counting display of electronic counter 2, can know the simulation test learnt and described product to be measured has been carried out to how many times fault current, being convenient to carry out record to the data of whole test process.Described here refers to the simulation test that described product to be measured carries out primary fault electric current fault current simulation test product to be measured being carried out to one-period.
Described master controller 800 controls the open and close of the first gate-controlled switch 110, second gate-controlled switch 120 and the 3rd gate-controlled switch 130 process for periodicity includes following several control model:
Suppose that the size of current that current feedback circuit 300 produces and exports is I, the number of turn of test coil 600 is N
Pattern one: the first gate-controlled switch 110, 3rd gate-controlled switch 130 is in closure state simultaneously, second gate-controlled switch 120 is in off-state, now, because of the first gate-controlled switch 110, 3rd gate-controlled switch 130 is in closure state, second gate-controlled switch 120 is in off-state, then recited above by current feedback circuit 300, the loop that the AB section of slide rheostat and the first gate-controlled switch 110 are formed and by current feedback circuit 300, the loop that 3rd gate-controlled switch 130 and test coil 600 are formed works simultaneously, and the electric current I that current feedback circuit 300 exports is shunted, the size of the electric current that each loop is got and the resistance in described loop are inversely proportional to, the resistance value of the AB section set in slide rheostat place in circuit is here R, certainly this resistance value R is adjustable, the self-resistance of setting test coil 600 is R c, so can calculate to obtain according to the characteristic of circuit the electric current that flows through in described test coil the fault current so now test coil produced is this current value I ccan be adjusted it by the size of resistance R in adjustment slide rheostat place in circuit.
Pattern two: the first gate-controlled switch 110, second gate-controlled switch 120 is in off-state, 3rd gate-controlled switch 130 is in closure state, now, due to the first gate-controlled switch 110 disconnect, the second gate-controlled switch 120 is in off-state, 3rd gate-controlled switch is in closure state, the electric current I that current feedback circuit 300 produces all flows through the loop formed by the 3rd gate-controlled switch 130 and test coil 600, the electric current I therefore flow through in test coil 600 c=I, the size of the simulated failure electric current now produced in test coil 600 is I*N.
Pattern three: the three gate-controlled switch 130 is in off-state, and now, because the 3rd gate-controlled switch 130 is in off-state, the loop formed by the 3rd gate-controlled switch 130 and test coil 600 is in off state, the electric current I now flow through in test coil 600 c=0, the size of the simulated failure electric current produced in test coil 600 is 0.
The above embodiment is three kinds of fault currents of this failure current simulation device simulation, and pattern one, pattern two and pattern three are carried out successively, the one-period of composition fault current simulation.Simultaneously, due in pattern one, resistance value in slide rheostat 500 place in circuit can carry out free adjustment, thus the electric current in the loop formed by the 3rd gate-controlled switch 130 and test coil 600 can be made can to adjust in a larger scope, the fault current scope simulated is relatively wider, therefore can realize the test of the simulated failure electric current to multiple power product.
In the above embodiment, in order to guarantee the security producing normal fault simulation electric current and slide rheostat work, described slide rheostat 500 should select rated power large as far as possible, and preferably, the rated power of slide rheostat 500 should meet P volumethe maximum value of > I*I* slide rheostat, therefore the maximum value of slide rheostat 500 should be less than
In above-described embodiment, described first gate-controlled switch 110, second gate-controlled switch 120 and the 3rd gate-controlled switch 130 preferably adopt electromagnetic relay, certainly also can adopt the gate-controlled switch of other types, as long as can realize its automatic control just passable.Described first on-off controller 210, second switch controller 220 and the 3rd on-off controller 130 are solenoid, direct supply 700 powers to described three solenoids by master controller 800, meanwhile, described direct supply 700 powers can under the control of master controller 800 electronic counter 400.In the present embodiment, when to control direct supply 700 be the solenoid of the first gate-controlled switch 110 to master controller 800, the first gate-controlled switch 110 closes; When the solenoid that control direct supply 700 is the first gate-controlled switch 110 is stopped power supply, the first gate-controlled switch 110 disconnects; In like manner, when to control direct supply 700 be the solenoid of the second gate-controlled switch 120 to master controller 800, the second gate-controlled switch 120 closes; When the solenoid that control direct supply 700 is the second gate-controlled switch 120 is stopped power supply, the second gate-controlled switch 120 disconnects; By that analogy, the control mode of the 3rd gate-controlled switch 130 is the same with above-mentioned control mode.Preferably, described direct supply 700 can be arranged on the outside of master controller 800, also can be arranged on the inside of master controller 800, if can realize master controller 800 to its control can be the first on-off controller 210, second switch controller 220, the 3rd on-off controller 230 and electronic counter 400 power.Therefore, in this preferred embodiment, to the one-period process of fault current simulation be:
Pattern one: master controller 800 controls the solenoid of solenoid that direct supply 700 is the first gate-controlled switch 110 and the 3rd gate-controlled switch 130, first gate-controlled switch 110, the 3rd gate-controlled switch 130 are in closure state simultaneously, simultaneously master controller 800 controls direct supply 700 and powers for electronic counter 400, and now the counting of electronic counter 400 shows and can be adjusted to zero.Because the first gate-controlled switch 110 and the 3rd gate-controlled switch 130 are all in closure state, the electric current flow through in described test coil 600 the fault current so now test coil 600 produced is
Pattern two: immediately following pattern one, master controller 800 controls the solenoid that direct supply 700 stopping is the first gate-controlled switch 110 again, and the first gate-controlled switch 110 is in off-state, and the 3rd gate-controlled switch 130 is still in closure state; Now, because the first gate-controlled switch 110 disconnects, the 3rd gate-controlled switch 130 closes, the electric current I flow through in test coil 600 c=I, the size of the simulated failure electric current now produced in test coil 600 is I*N.
Pattern three: immediately following pattern two, master controller 800 controls again the solenoid that direct supply 700 stopping is the 3rd gate-controlled switch 130,3rd gate-controlled switch 130 is also in off-state, because the 3rd gate-controlled switch 130 disconnects, and the electric current I now flow through in test coil 600 c=0, the size of the simulated failure electric current produced in test coil 600 is 0.
The one-period of fault current simulation in above three modal sets cost implementation, wherein, I is the electric current that current feedback circuit sends, and R is the resistance of slide rheostat 500AB section resistance, R cfor the resistance of test coil.
The method of work of the failure current simulation device of the above embodiment is as follows:
Before failure current simulation device is started working, be first installed to by test product on test coil 600, method of work described here refers to the job step of the ready rear failure current simulation device of all preliminary work.
As shown in Figure 4, the job step of a kind of embodiment of this fault detector comprises:
Step S100, master controller 800 controls direct supply 700 and powers and the clearing that resets for electronic counter 400, makes electronic counter 400 carry out the preparation of counting, and now, the counting display of electronic counter 400 should be zero.
Step S200, master controller 800 controls the first gate-controlled switch 110, the 3rd gate-controlled switch 130 closes simultaneously, second gate-controlled switch 120 disconnects, the loop that the loop formed by AB section and first gate-controlled switch 110 of current feedback circuit 300, slide rheostat and current feedback circuit 300, the 3rd gate-controlled switch 130 and test coil 600 are formed works simultaneously, and the electric current I that current feedback circuit 300 exports is shunted, the electric current flow through in test coil 600 the simulated failure electric current produced is and by this mode duration preset time t 1;
Step S300, then master controller 800 controls the first gate-controlled switch 110 and disconnects, because now not carrying out any control operation to the 3rd gate-controlled switch 130,3rd gate-controlled switch 130 is still in closure state, and the loop formed by AB section and first gate-controlled switch 110 of current feedback circuit 300, slide rheostat quits work; Another loop that current feedback circuit 300, the 3rd gate-controlled switch 130 and test coil 600 are formed works on, the electric current I now flow through in test coil 600 c=I, the simulated failure electric current produced under this pattern is I*N, and by this mode duration preset time t 2;
Step S400, master controller 800 controls the 3rd gate-controlled switch 130 and disconnects, now, because the 3rd gate-controlled switch 130 disconnects, another loop that current feedback circuit 300, the 3rd gate-controlled switch 130 and test coil 600 are formed also quits work, and is in off state, the electric current I flow through in test coil c=0, and by this mode duration preset time t 3;
Step S500, master controller 800 controls the counting increase of electronic counter 400 once, and judges whether the counting of electronic counter 400 reaches preset value, and if so, step terminates; As no, return step S200; To the test of different electronic product, the number of times of required fault current simulation is different, can arrange electronic counter before the test begins, just stop simulating the fault current of product to be measured when its counting reaches preset value, and terminate the related procedure of test, if after each control electronic counter 400 counts increase once, the counting of electronic counter does not reach described preset value, then return the simulation cycle that step S200 enters next fault current.
In the above operation steps of the present embodiment, respectively by the control realization to its control end and solenoid to the control of the first gate-controlled switch 110, second gate-controlled switch 120 and the 3rd gate-controlled switch 130, master controller 800 controls direct supply 700 for the energising of its solenoid, can realize the closed procedure to the first gate-controlled switch 110, second gate-controlled switch 120 and the 3rd gate-controlled switch 130; Master controller 800 controls direct supply 700 to be stopped, for the power supply of its solenoid, can realizing the opening operation to the first gate-controlled switch 110, second gate-controlled switch 120 and the 3rd gate-controlled switch 130.And, due to in the test process of different product, the test duration of the fault current produced under often kind of pattern is different, therefore often kind of pattern all needs to maintain the regular hour, and preset time t 1 involved in the method for work of the present embodiment, t2 and t3 can set according to the test request of concrete product to be measured.
Above step S200, to step S400, is the one-period of fault current simulation, and the output often completing the fault simulation electric current of one-period will control the automatic increase of counting increase of electronic counter 400 once.
Preferably, the concrete grammar that controlling electronic counter 400 counting increases once is: master controller 800 controls described direct supply 700 pairs of electronic counters 400 and stops power supply, and then controls again to power once to it.
Method of work described in embodiment above, the simulation of fault current can not only be realized, and in the simulation process of fault current, the size of the fault current can simulated by the resistance adjustment in the place in circuit of adjustment slide rheostat, accomplish the simulation of variable fault current, shown by the counting of electronic counter simultaneously, can obtain very intuitively product to be measured test case and to the testing time that it completes, be conducive to the analysis to each test data in test process.
As shown in Figure 2, for the invention provides the failure current simulation device of another kind of embodiment, this failure current simulation device comprises: current feedback circuit 300, first gate-controlled switch 110, second gate-controlled switch 120, 3rd gate-controlled switch 130, test coil 600 and slide rheostat 500, the AC end of current feedback circuit 300 is connected with the slide plate A of slide rheostat 500 and one end of the 3rd gate-controlled switch 130 respectively, the other end of the 3rd gate-controlled switch 130 is connected with one end of test coil 600, the other end of test coil 600 is held with the NC of current feedback circuit 300 and is connected, one end B of slide rheostat 500 resistance wire is connected with one end of the first gate-controlled switch 110, the other end C of resistance wire is connected with one end of the second gate-controlled switch 120, the other end of the first gate-controlled switch 110 and the second gate-controlled switch 120 is held with the NC of current feedback circuit 300 respectively and is connected.
This failure current simulation device also comprises direct supply 700, the 4th gate-controlled switch 140, first on-off controller 210, second switch controller 220, the 3rd on-off controller 230, the 4th on-off controller 240 and electronic counter 400, first on-off controller 210, second switch controller 220, the 3rd on-off controller 230 and electronic counter 400 and is electrically connected with direct supply 700 respectively by the 4th gate-controlled switch 140.
4th on-off controller 240 is directly electrically connected with direct supply 700, for controlling the open and close of the 4th gate-controlled switch 140;
First on-off controller 210, for controlling the open and close of the first gate-controlled switch 110;
Second switch controller 220, for controlling the open and close of the second gate-controlled switch 120;
3rd on-off controller 230, for controlling the open and close of the 3rd gate-controlled switch 130;
Electronic counter 400, for the quasi periodic number of times of record trouble current-mode;
Wherein, by controlling four on-off controllers different working time, periodically control the open and close of the first gate-controlled switch 110, second gate-controlled switch 120, the 3rd gate-controlled switch 130 and the 4th gate-controlled switch 140, and when the control completing one-period, control the counting increase of electronic counter 400 once.
The difference of the failure current simulation device in the embodiment shown in the failure current simulation device of the present embodiment and Fig. 1 is, instead of the master controller 800 in Fig. 1 embodiment in the present embodiment with the 4th gate-controlled switch 140 and the 4th on-off controller 240.
In the present embodiment, by controlling four on-off controllers different working time, the process that periodicity property controls the open and close of the first gate-controlled switch 110, second gate-controlled switch 120, the 3rd gate-controlled switch 130 and the 4th gate-controlled switch 140 includes following several control model:
Suppose that the size of current that current feedback circuit 300 produces and exports is I ', the number of turn of test coil 600 is N
Pattern one: the first gate-controlled switch 110, 3rd gate-controlled switch 130 and the 4th gate-controlled switch 140 are in closure state, second gate-controlled switch 120 is in off-state, now, because the 4th gate-controlled switch 140 closes, described first on-off controller 210 given by direct supply 700, second switch controller 220, 3rd on-off controller 230 is powered, by controlling the first on-off controller 210 further, second switch controller 220 and the 3rd on-off controller 230 can control the first gate-controlled switch 110, 3rd gate-controlled switch 130 is in closure state, second gate-controlled switch 120 is in off-state, then by current feedback circuit 300, the loop that the AB section of slide rheostat and the first gate-controlled switch 110 are formed and current feedback circuit 300, the loop that 3rd gate-controlled switch 130 and test coil 600 are formed works simultaneously, and to the electric current I that current feedback circuit 300 exports ' shunt, the size of the electric current that each loop is got and the resistance in described loop are inversely proportional to, the resistance value of the AB section set in slide rheostat place in circuit is here R ', certainly this resistance value R ' is adjustable, the self-resistance of setting test coil 600 is R c', so can calculate to obtain according to the characteristic of circuit the electric current that flows through in described test coil 600 the fault current so now test coil 600 produced is this fault curre can be adjusted it by the size of resistance R ' in adjustment slide rheostat place in circuit.
Pattern two: the second gate-controlled switch 120, 3rd gate-controlled switch 130 and the 4th gate-controlled switch 140 are in closure state, first gate-controlled switch 110 is in off-state and to adjust the operating resistance of slide rheostat 500 place in circuit maximum, now, because the 4th gate-controlled switch 140 closes, to described first on-off controller 210, second switch controller 220, 3rd on-off controller 230 is powered, and control the second gate-controlled switch 120 further by a kind of described mode of pattern and the 3rd gate-controlled switch 130 is in closure state, and due to the operating resistance of adjustment slide rheostat 500 place in circuit maximum, namely the resistance of AC end reaches maximum, maximum value due to this slide rheostat 500 is far longer than the internal resistance of test coil 600, so by current feedback circuit 300, resistance in the loop that the AC section of slide rheostat 500 and the second gate-controlled switch 120 are formed is much larger than by current feedback circuit 300, resistance in the loop that 3rd gate-controlled switch 130 and test coil 600 are formed, therefore the electric current I that current feedback circuit 300 produces almost all flows through the loop formed by the 3rd gate-controlled switch 130 and test coil 600, therefore the electric current I flow through in test coil 600 c'=I', the size of the simulated failure electric current now produced in test coil 600 is I'*N.
Pattern three: the first gate-controlled switch 110, second gate-controlled switch 120 and the 3rd gate-controlled switch 130 are in off-state, 4th gate-controlled switch 140 is in closure state, because the 4th gate-controlled switch 140 closes, direct supply 700 gives the first on-off controller 210 respectively, second switch controller 220 and the 3rd on-off controller 230 are powered, the first gate-controlled switch 110 can be controlled respectively by controlling these three controllers further, second gate-controlled switch 120 and the 3rd gate-controlled switch 130 are in off-state, now, because the 3rd gate-controlled switch 130 is in off-state, the loop formed by the 3rd gate-controlled switch 130 and test coil 600 is in off state, the electric current I now flow through in test coil 600 c'=0, the size of the simulated failure electric current produced in test coil C is 0.
Pattern four: the four gate-controlled switch 140 is in off-state, because the 4th gate-controlled switch 140 disconnects, direct supply 700 stopped the power supply to the first on-off controller 210, second switch controller 220 and the 3rd on-off controller 230, meanwhile, direct supply stopped the power supply to electronic counter 400.
The above embodiment is the one-period of this failure current simulation device simulated failure electric current, and pattern one, pattern two, pattern three and pattern four are carried out successively, the one-period of composition fault current simulation.Simultaneously, due in pattern one, resistance value in slide rheostat 500 place in circuit can carry out free adjustment, thus can make can be adjusted in a larger scope by current feedback circuit 300, the 3rd gate-controlled switch 130 and the electric current in treating the loop that test coil 600 forms, the fault current scope simulated is relatively wider, therefore can realize the test of the simulated failure electric current to multiple power product.
In this embodiment, in order to guarantee the security producing normal fault simulation electric current and slide rheostat work, described slide rheostat 500 should select rated power large as far as possible, and preferably, the rated power of slide rheostat 500 should meet P volumethe maximum value of > I*I* slide rheostat, therefore the maximum value of slide rheostat 500 should be less than
As shown in Figure 3, in the present embodiment, described first gate-controlled switch 110, second gate-controlled switch 120, the 3rd gate-controlled switch 130 and the 4th gate-controlled switch 140 preferably adopt A.C. contactor; Described first on-off controller 210, second switch controller 220, the 3rd on-off controller 130 and the 4th on-off controller 140 preferably adopt even numbers to show tester, even numbers show tester can control A.C. contactor be in disconnection or closure state, and keeping certain hour, this time carries out free setting realization by showing tester to described even numbers.
As shown in Figure 3, in figure, the first on-off controller 210 is that the first even numbers shows tester, second switch controller 220 is that the second even numbers shows tester, 3rd on-off controller 230 is that the 3rd even numbers shows tester, 4th on-off controller 240 is that the 4th even numbers shows tester, the AC end of current feedback circuit 300 is connected with the scribing A of slide rheostat, also be connected with 9 pin of the 3rd A.C. contactor, the NC end of current feedback circuit 300 is connected with one end of test coil 600 with 2 pin of the first A.C. contactor, 6 pin of the second A.C. contactor simultaneously.The AC end that first even numbers shows tester, the second even numbers shows tester and the 3rd even numbers shows tester is parallel-connected to 14 pin of the 4th A.C. contactor, first even numbers shows tester, the second even numbers shows tester and the 3rd even numbers show tester NC end be connected respectively by 14 pin of electronic counter 400 with the 4th A.C. contactor, the AC end that AC, NC external direct current power supply the 700, four even numbers that 4th even numbers shows tester shows tester is connected with 13 pin of the 4th A.C. contactor simultaneously.1,2 pin that first even numbers shows tester are connected respectively at 3,4 pin of the first A.C. contactor, 1,2 pin that second even numbers shows tester are connected respectively at 7,8 pin of the second A.C. contactor, 1,2 pin that 3rd even numbers shows tester can be connected with 11,12 pin of the 3rd A.C. contactor respectively, and 1,2 pin that the 4th even numbers shows tester are connected respectively at 15,16 pin of the 4th A.C. contactor.The C end of slide rheostat 500 resistance wire is connected with 5 pin of the second A.C. contactor, and the other end of test coil 600 is connected with 10 pin of the 3rd A.C. contactor.
In Fig. 3,1,2 pin of the first A.C. contactor are for often to open, and 5,6 pin of the second A.C. contactor are for often to open, and 9,10 pin of the 3rd A.C. contactor are normally closed, and 13,14 pin of the 4th A.C. contactor are normally closed.1,2 pin that each even numbers shows tester are that power supply exports control pin; Such as, when showing tester to described first even numbers and powering and control its work, this even numbers shows 3,4 pin of tester by 1,2 foot control system first A.C. contactors, thus 1,2 pin controlling the first A.C. contactor become closure state from normally open; When showing tester to described second even numbers and powering and control its work, this even numbers shows 7,8 pin of tester by 1,2 foot control system second A.C. contactors, thus 5,6 pin controlling the second A.C. contactor become closure state from normally open; In like manner, the 3rd even numbers shows tester and the 4th even numbers, and to show the control principle of tester similar, do not repeat them here.
The working time of tester is shown by setting corresponding even numbers, holding time of the duty of corresponding gate-controlled switch can be controlled, such as, setting the working time that the first even numbers shows tester is t1, then this even numbers shows the time that tester can control the first A.C. contactor closed is t1.
Therefore, in this preferred embodiment, to the mode of operation that the one-period process of fault current simulation comprises be:
Pattern one: because the 4th A.C. contactor is in normally off, direct supply 700 shows tester to respectively the first even numbers, second even numbers shows tester and the 3rd even numbers and shows tester and power, and control the first even numbers and show tester work, setting the working time that the first even numbers shows tester is t1, then the first A.C. contactor is in closure state, because the second A.C. contactor is in normally open, 3rd A.C. contactor and the 4th A.C. contactor are in normally off, then by current feedback circuit 300, the loop that the AB section of slide rheostat and the first A.C. contactor are formed and by current feedback circuit 300, the loop that 3rd A.C. contactor and test coil 600 are formed works simultaneously, and to the electric current I that current feedback circuit 300 exports ' shunt, the size of the electric current that each loop is got and the resistance in described loop are inversely proportional to, the resistance value of the AB section set in slide rheostat place in circuit is here R ', certainly this resistance value R ' is adjustable, the self-resistance of setting test coil 600 is R c', so can calculate to obtain according to the characteristic of circuit the electric current that flows through in described test coil 600 the fault current so now test coil 600 produced is
Pattern two: the first even numbers shows tester and quits work, second even numbers shows tester and starts working, and to set the working time be t2, then quit work because the first even numbers shows tester, first A.C. contactor turns back to normally open, start working because the second even numbers shows tester, second A.C. contactor becomes closure state from normally open, because the 3rd ac contactor and the 4th A.C. contactor are in normally off, the operating resistance simultaneously adjusting slide rheostat 500 place in circuit is maximum, resistance due to this slide rheostat 500 is far longer than the internal resistance of test coil 600, so by current feedback circuit 300, resistance in the loop that the AC section of slide rheostat and the second A.C. contactor are formed is much larger than by current feedback circuit 300, resistance in the loop that 3rd A.C. contactor and test coil 600 are formed, therefore the electric current I that current feedback circuit 300 produces almost all flows through the loop formed by the 3rd A.C. contactor and test coil 600, therefore the electric current I flow through in test coil 600 c'=I', the size of the simulated failure electric current now produced in test coil 600 is I'*N.
Pattern three: the second even numbers shows tester and quits work, 3rd even numbers shows tester and starts working, and to set the working time be t3, then quit work because the second even numbers shows tester, second A.C. contactor turns back to normally open, first A.C. contactor and the second A.C. contactor are all in normally open, because the 3rd even numbers shows tester work, 3rd ac contactor becomes off-state from normally off, therefore, the loop that 3rd A.C. contactor and test coil 600 are formed is in off state, the electric current I now flow through in test coil 600 c'=0, the size of the simulated failure electric current produced in test coil 600 is 0.
Pattern four: the three even numbers shows tester and quits work, 4th even numbers shows tester and starts working, and to set the working time be t4, because the 4th even numbers shows tester work, 4th A.C. contactor becomes off-state from normally off, direct supply 700 stopped tester is shown to the first even numbers, the second even numbers shows tester and the 3rd even numbers shows the power supply of tester, meanwhile, direct supply 700 stopped the power supply to electronic counter 400.
In pattern four, at the end of working time t4,4th even numbers shows tester and quits work, 4th A.C. contactor turns back to normally off again, direct supply 700 gives that the first even numbers shows tester, the second even numbers shows tester and the 3rd even numbers shows tester and powers again, and again gives the power supply of electronic counter 400, now, electronic counter 400 is owing to again powering once to it, and the corresponding increase of reading once.When that is often completing the fault current simulation of one-period, the reading of electronic counter can increase once automatically.
Before failure current simulation device is started working, be first installed to by test product on test coil 600, method of work described here refers to the job step of the ready rear failure current simulation device of all preliminary work.
As shown in Figure 5, the job step of a kind of embodiment of this accident indicator comprises:
Step S100 ', controls electronic counter reset and resets.
Step S200 ', control the first on-off controller 210 work and run preset time t 1, now, first gate-controlled switch 110 is in closure state, because the second gate-controlled switch 120 is normal open switch, 3rd gate-controlled switch 130 and the 4th gate-controlled switch 140 are normally closed switch, by current feedback circuit 300, the loop that the AB section of slide rheostat and the first gate-controlled switch 110 are formed and current feedback circuit 300, the loop that 3rd gate-controlled switch 130 and test coil 600 are formed works simultaneously, and to the electric current I that current feedback circuit 300 exports ' shunt, the electric current flow through in test coil 600 the simulated failure electric current produced is
Step S300 ', control the first on-off controller 210 to quit work, second switch controller 220 works and runs preset time t 2, and the operating resistance adjusting slide rheostat place in circuit is maximum, first gate-controlled switch 110 turns back to normally open, second gate-controlled switch 120 becomes closure state from normally open, because the 3rd gate-controlled switch 130 and the 4th gate-controlled switch 140 are in normally closed state, the operating resistance of slide rheostat 500 place in circuit is maximum, the resistance of this slide rheostat 500 is far longer than the internal resistance of test coil 600, so by current feedback circuit 300, resistance in the loop that the AC section of slide rheostat and the second gate-controlled switch 120 are formed is much larger than by current feedback circuit 300, resistance in the loop that 3rd gate-controlled switch 130 and test coil 600 are formed, therefore the electric current I that current feedback circuit 300 produces almost all flows through the loop formed by the 3rd gate-controlled switch 130 and test coil 600, therefore the electric current I flow through in test coil 600 c'=I', the size of the simulated failure electric current now produced in test coil 600 is I'*N.
Step S400 ', control second switch controller 220 to quit work, 3rd on-off controller 230 works and runs preset time t 3, because second switch controller 220 quits work, second A.C. contactor 120 turns back to normally open, because the first gate-controlled switch 110 and the second gate-controlled switch 120 are all in normally open, and because the 3rd on-off controller 230 works, 3rd gate-controlled switch 130 becomes off-state from normally off, therefore, current feedback circuit 300, the loop that 3rd gate-controlled switch 130 and test coil 600 are formed is in off state, the electric current I now flow through in test coil 600 c'=0, the size of the simulated failure electric current produced in test coil 600 is 0.
Step S500 ', control the 3rd on-off controller 230 to quit work, and controller the 4th on-off controller 240 is started working, and to set the working time be t4, because the 4th on-off controller 240 works, 4th gate-controlled switch 140 becomes off-state from normally off, direct supply 700 stopped the first on-off controller 210, the power supply of second switch controller 220 and the 3rd on-off controller 230, simultaneously, direct supply 700 stopped the power supply to electronic counter 400, now also to judge whether the counting of electronic counter 400 reaches preset value, if, step terminates, as no, return step S200 ',
In the above operation steps of the present embodiment, respectively by the control realization to its on-off controller to the control of the first gate-controlled switch 110, second gate-controlled switch 120 and the 3rd gate-controlled switch 130, and, due to in the test process of different product, the test duration of the fault current produced under often kind of pattern is different, therefore often kind of pattern all needs to maintain the regular hour, and time t1, t2, t3 and t4 involved in the method for work of the present embodiment can set according to the test request of concrete product to be measured.
Above step S200, to step S500 ', is the one-period of fault current simulation, and the output often completing the fault simulation electric current of one-period will control the automatic increase of counting increase of electronic counter 400 once.
Method of work described in embodiment above, the simulation of fault current can not only be realized, and in the simulation process of fault current, the size of the fault current can simulated by the resistance adjustment in the place in circuit of adjustment slide rheostat, accomplish the simulation of variable fault current, shown by the counting of electronic counter simultaneously, can obtain very intuitively product to be measured test case and to the testing time that it completes, be conducive to the analysis to each test data in test process.
The foregoing is only preferred embodiment of the present invention, not in order to limit the present invention, all any amendments done within the spirit and principles in the present invention, equivalent replacement and improvement etc., all should be included within protection scope of the present invention.

Claims (10)

1. a failure current simulation device, is characterized in that, this failure current simulation device comprises:
Current feedback circuit, first gate-controlled switch, second gate-controlled switch, 3rd gate-controlled switch, test coil and slide rheostat, the AC end of current feedback circuit is connected with the slide plate of slide rheostat and one end of the 3rd gate-controlled switch respectively, the other end of the 3rd gate-controlled switch is connected with one end of test coil, the other end of test coil is held with the NC of current feedback circuit and is connected, one end of slide rheostat resistance wire is connected with one end of the first gate-controlled switch, the other end of resistance wire is connected with one end of the second gate-controlled switch, the other end of the first gate-controlled switch and the second gate-controlled switch is held with the NC of electrical power generator respectively and is connected,
This failure current simulation device also comprises direct supply, master controller, the first on-off controller, second switch controller, the 3rd on-off controller and electronic counter, and the first on-off controller, second switch controller, the 3rd on-off controller and electronic counter are electrically connected with direct supply respectively by master controller;
First on-off controller, for controlling the open and close of the first gate-controlled switch under the control of master controller;
Second switch controller, for controlling the open and close of the second gate-controlled switch under the control of master controller;
3rd on-off controller, for controlling the open and close of the 3rd gate-controlled switch under the control of master controller;
Electronic counter, for record trouble current analog cycle times under the control of master controller;
Master controller, for operating to described first on-off controller, second switch controller and the 3rd on-off controller switching electricity by controlling direct supply, periodically control the open and close of the first gate-controlled switch, the second gate-controlled switch and the 3rd gate-controlled switch, and when the control completing one-period, control the counting increase of electronic counter once.
2. failure current simulation device according to claim 1, is characterized in that, the process controlling the first gate-controlled switch, the second gate-controlled switch and the 3rd gate-controlled switch open and close in described one-period comprises following pattern:
Pattern one: the first gate-controlled switch, the 3rd gate-controlled switch are in closure state, and the second gate-controlled switch is in off-state, the electric current flow through in test coil
Pattern two: the first gate-controlled switch, the second gate-controlled switch are in off-state, and the 3rd gate-controlled switch is in closure state, the electric current I flow through in test coil c=I;
Pattern three: the three gate-controlled switch is in off-state, the electric current I flow through in test coil c=0;
Wherein, I is the electric current that current feedback circuit sends, and R is the resistance in slide rheostat place in circuit, R cfor the resistance of test coil.
3. failure current simulation device according to claim 2, it is characterized in that, described first gate-controlled switch, the second gate-controlled switch and the 3rd gate-controlled switch are electromagnetic relay, and the first on-off controller, second switch controller and the 3rd on-off controller are respectively solenoid.
4. a failure current simulation device, is characterized in that, this failure current simulation device comprises:
Current feedback circuit, first gate-controlled switch, second gate-controlled switch, 3rd gate-controlled switch, test coil and slide rheostat, the AC end of current feedback circuit is connected with the slide plate of slide rheostat and one end of the 3rd gate-controlled switch respectively, the other end of the 3rd gate-controlled switch is connected with one end of test coil, the other end of test coil is held with the NC of current feedback circuit and is connected, one end of slide rheostat resistance wire is connected with one end of the first gate-controlled switch, the other end of resistance wire is connected with one end of the second gate-controlled switch, the other end of the first gate-controlled switch and the second gate-controlled switch is held with the NC of current feedback circuit respectively and is connected,
This failure current simulation device also comprises direct supply, the 4th gate-controlled switch, the first on-off controller, second switch controller, the 3rd on-off controller, the 4th on-off controller and electronic counter, and the first on-off controller, second switch controller, the 3rd on-off controller and electronic counter are electrically connected with direct supply respectively by described 4th gate-controlled switch;
4th on-off controller is directly electrically connected with direct supply, for controlling the open and close of the 4th gate-controlled switch;
First on-off controller, for controlling the open and close of the first gate-controlled switch;
Second switch controller, for controlling the open and close of the second gate-controlled switch;
3rd on-off controller, for controlling the open and close of the 3rd gate-controlled switch;
Electronic counter, for the quasi periodic number of times of record trouble current-mode;
Wherein, by controlling four on-off controllers different working time, periodically control the open and close of the first gate-controlled switch, the second gate-controlled switch, the 3rd gate-controlled switch and the 4th gate-controlled switch, and when the control completing one-period, control the counting increase of electronic counter once.
5. failure current simulation device according to claim 4, is characterized in that, the process controlling the first gate-controlled switch, the second gate-controlled switch, the 3rd gate-controlled switch and the 4th gate-controlled switch open and close in described one-period comprises following pattern:
Pattern one: the first gate-controlled switch, the 3rd gate-controlled switch and the 4th gate-controlled switch are in closure state, and the second gate-controlled switch is in off-state, the electric current flow through in test coil
Pattern two: the second gate-controlled switch, the 3rd gate-controlled switch and the 4th gate-controlled switch are in closure state, and the first gate-controlled switch is in off-state and to adjust the operating resistance of slide rheostat place in circuit maximum, the electric current I flow through in test coil c'=I';
Pattern three: the first gate-controlled switch, the second gate-controlled switch and the 3rd gate-controlled switch are in off-state, and the 4th gate-controlled switch is in closure state, the electric current I flow through in test coil c'=0;
Pattern four: the four gate-controlled switch is in off-state;
Wherein, I' is the electric current that current feedback circuit sends, and R' is the resistance in slide rheostat place in circuit, R c' be the resistance of test coil.
6. failure current simulation device according to claim 5, it is characterized in that, described first gate-controlled switch, the second gate-controlled switch, the 3rd gate-controlled switch and the 4th gate-controlled switch are A.C. contactor, first gate-controlled switch and the second gate-controlled switch are normal open switch, 3rd gate-controlled switch and the 4th gate-controlled switch are normally closed switch, and the first on-off controller, second switch controller, the 3rd on-off controller and the 4th on-off controller are respectively even numbers and show tester.
7. the method for work of a failure current simulation device, it is characterized in that, described failure current simulation device comprises current feedback circuit, first gate-controlled switch, second gate-controlled switch, 3rd gate-controlled switch, test coil and slide rheostat, the AC end of current feedback circuit is connected with the slide plate of slide rheostat and one end of the 3rd gate-controlled switch respectively, the other end of the 3rd gate-controlled switch is connected with one end of test coil, the other end of test coil is held with the NC of current feedback circuit and is connected, one end of slide rheostat resistance wire is connected with one end of the first gate-controlled switch, the other end of resistance wire is connected with one end of the second gate-controlled switch, the other end of the first gate-controlled switch and the second gate-controlled switch is held with the NC of current feedback circuit respectively and is connected,
This failure current simulation device also comprises direct supply, master controller, the first on-off controller, second switch controller, the 3rd on-off controller and electronic counter, and the first on-off controller, second switch controller, the 3rd on-off controller and electronic counter are electrically connected with direct supply respectively by master controller;
Described method of work comprises the following steps:
Step S100, it is that electronic counter is powered and the clearing that resets that master controller controls direct supply;
Step S200, master controller controls the first gate-controlled switch and the 3rd gate-controlled switch closes simultaneously, and the second gate-controlled switch disconnects, the electric current flow through in test coil the fault current produced is and continue preset time t 1;
Step S300, master controller controls the first gate-controlled switch, the second gate-controlled switch disconnects, and the 3rd gate-controlled switch closes, the electric current I flow through in test coil c=I, the fault current of generation is I*N, and continues preset time t 2;
Step S400, master controller controls the 3rd gate-controlled switch and disconnects, the electric current I flow through in test coil c=0, the fault current of generation is 0, and continues preset time t 3;
Step S500, master controller controls the counting increase of electronic counter once, and judges whether the counting of electronic counter reaches pre-set count values, and if so, step terminates; As no, return step S200;
Wherein, I is the electric current that current feedback circuit sends, and R is the resistance in slide rheostat place in circuit, R cfor the resistance of test coil, N is the number of turn of test coil.
8. the method for work of failure current simulation device according to claim 7, is characterized in that,
Master controller controls the first gate-controlled switch, the second gate-controlled switch and the 3rd gate-controlled switch and to close or the method that disconnects is specially: master controller controls direct supply and is energized or power-off to the first on-off controller, second switch controller and the 3rd on-off controller;
The concrete grammar that master controller controls electronic counter counting and increases once is: master controller controls direct supply and stops power supply to electronic counter, and then controls again to power once to it.
9. the method for work of a failure current simulation device, it is characterized in that, described failure current simulation device comprises current feedback circuit, first gate-controlled switch, second gate-controlled switch, 3rd gate-controlled switch, test coil and slide rheostat, the AC end of current feedback circuit is connected with the slide plate of slide rheostat and one end of the 3rd gate-controlled switch respectively, the other end of the 3rd gate-controlled switch is connected with one end of test coil, the other end of test coil is held with the NC of current feedback circuit and is connected, one end of slide rheostat resistance wire is connected with one end of the first gate-controlled switch, the other end of resistance wire is connected with one end of the second gate-controlled switch, the other end of the first gate-controlled switch and the second gate-controlled switch is held with the NC of electrical power generator respectively and is connected,
This failure current simulation device also comprises direct supply, the 4th gate-controlled switch, the first on-off controller, second switch controller, the 3rd on-off controller, the 4th on-off controller and electronic counter, first on-off controller, second switch controller, the 3rd on-off controller and electronic counter are electrically connected with direct supply respectively by the 4th gate-controlled switch, 4th on-off controller is directly electrically connected with direct supply, first gate-controlled switch and the second gate-controlled switch are normal open switch, and the 3rd gate-controlled switch and the 4th gate-controlled switch are normally closed switch;
Described method of work comprises the following steps:
Step S100 ', electronic counter resets and resets;
Step S200 ', controls the first on-off controller work and runs preset time t 1, the electric current flow through in test coil I c ′ = I ′ R ′ R ′ + R c ′ , The fault current produced is I c ′ = I ′ R ′ R ′ + R c ′ * N ;
Step S300 ', controls the first on-off controller and quits work, and the work of second switch controller also runs preset time t 2, and the operating resistance adjusting slide rheostat place in circuit is maximum, the electric current I flow through in test coil c'=I', the fault current of generation is I'*N;
Step S400 ', control second switch controller and quit work, the 3rd on-off controller work also runs preset time t 3, the electric current I flow through in test coil c'=0, the fault current of generation is 0;
Step S500 ', controls that the 3rd on-off controller quits work, the 4th on-off controller work quitting work after running preset time t 4, and judges whether the counting of electronic counter reaches pre-set count values, and if so, step terminates; As no, return step S200 ';
Wherein, I' is the electric current that current feedback circuit sends, and R' is the resistance in slide rheostat place in circuit, R c' be the resistance of test coil, N is the number of turn of test coil.
10. the method for work of failure current simulation device according to claim 9, it is characterized in that, described first gate-controlled switch, the second gate-controlled switch, the 3rd gate-controlled switch and the 4th gate-controlled switch are A.C. contactor, and the first on-off controller, second switch controller, the 3rd on-off controller and the 4th on-off controller are respectively even numbers and show tester.
CN201210344171.7A 2012-09-17 2012-09-17 Failure current simulation device and working method thereof Active CN102879669B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201210344171.7A CN102879669B (en) 2012-09-17 2012-09-17 Failure current simulation device and working method thereof

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201210344171.7A CN102879669B (en) 2012-09-17 2012-09-17 Failure current simulation device and working method thereof

Publications (2)

Publication Number Publication Date
CN102879669A CN102879669A (en) 2013-01-16
CN102879669B true CN102879669B (en) 2015-05-20

Family

ID=47481065

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201210344171.7A Active CN102879669B (en) 2012-09-17 2012-09-17 Failure current simulation device and working method thereof

Country Status (1)

Country Link
CN (1) CN102879669B (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107884633B (en) * 2016-09-30 2020-07-31 佛山市顺德区美的电热电器制造有限公司 Electric cooker and fault detection method and device of anti-overflow detection device of electric cooker
CN109358242A (en) * 2018-09-27 2019-02-19 国网天津市电力公司 A kind of power transmission and transformation system equipment state simulator
CN116317027B (en) * 2023-05-12 2023-08-01 石家庄科林电气股份有限公司 Control method, control module, fault indicator and storage medium

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN2072230U (en) * 1990-03-29 1991-02-27 刘金铎 Portable tester for protective relay
CN101339221A (en) * 2008-08-12 2009-01-07 中国西电电气股份有限公司 Test device for reactor volt-second characteristic of high voltage direct current transmission valve
CN201955459U (en) * 2010-11-02 2011-08-31 华北电力大学 10kV distribution network line fault simulation test platform
CN202002981U (en) * 2010-10-13 2011-10-05 中电普瑞科技有限公司 General test model of flexible AC power transmission FACTS device
CN102331536A (en) * 2011-06-23 2012-01-25 上海市安全生产科学研究所 Fault electric arc controllable simulative generation device
CN102621408A (en) * 2011-10-20 2012-08-01 无锡清源电气科技有限公司 Test system and test method of general converter product

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6844712B2 (en) * 1998-04-17 2005-01-18 Unique Technologies, Llc Multi-test circuit breaker locator having a transmitter and a receiver

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN2072230U (en) * 1990-03-29 1991-02-27 刘金铎 Portable tester for protective relay
CN101339221A (en) * 2008-08-12 2009-01-07 中国西电电气股份有限公司 Test device for reactor volt-second characteristic of high voltage direct current transmission valve
CN202002981U (en) * 2010-10-13 2011-10-05 中电普瑞科技有限公司 General test model of flexible AC power transmission FACTS device
CN201955459U (en) * 2010-11-02 2011-08-31 华北电力大学 10kV distribution network line fault simulation test platform
CN102331536A (en) * 2011-06-23 2012-01-25 上海市安全生产科学研究所 Fault electric arc controllable simulative generation device
CN102621408A (en) * 2011-10-20 2012-08-01 无锡清源电气科技有限公司 Test system and test method of general converter product

Also Published As

Publication number Publication date
CN102879669A (en) 2013-01-16

Similar Documents

Publication Publication Date Title
CN102981120B (en) Full-performance detecting system of magnetic latching relay and detecting method thereof
CN103454580B (en) A kind of circuit-breaker switching on-off coil characteristics proving installation
US9783071B2 (en) Device and method for providing a quantity of energy in said supply device for consumer
CN103760489B (en) Intelligent detection device for high-voltage circuit breaker
CN103196491B (en) Transformer integral comprehensive detection device
CN102721891B (en) Test device for non-liner resistor type resonance eliminator
CN104991131A (en) Flexible direct-current power-transmission converter-valve half-bridge structure power module test device
CN203798913U (en) Intelligent multichannel heater operating state and current monitoring system
CN102879669B (en) Failure current simulation device and working method thereof
CN103308807A (en) Transformer state detection device and breaker
CN102890256B (en) Failure current simulator and working method thereof
CN103311984A (en) Alternating current charging post for electric automobile
CN104730365A (en) Household appliance fault detecting device and method
CN206684228U (en) A kind of high-voltage circuit-breaker switching on-off coil resistance universal test device
CN105606999B (en) A kind of multichannel intermediate relay calibration equipment
CN204065355U (en) Primary cut-out coil intelligent detection device
CN103984250B (en) Multi-gear resistance output device and detecting system
CN207263824U (en) A kind of alternating current phases select breaker device
CN2781384Y (en) Test control platform for start voltage of electroscope
CN203037844U (en) Intelligent testing device for electric energy meter built-in load switch
CN215813074U (en) Electromagnetic valve reverse electromotive force monitoring system
CN203950137U (en) Many gears resistance output unit, detection system
CN202126467U (en) Low-voltage arc controllable simulation generation device
CN203365596U (en) Intelligent microcomputer relay protection rapid testing device
CN109307822A (en) Fault detection circuit, battery roasting plant and fault detection method

Legal Events

Date Code Title Description
C06 Publication
PB01 Publication
C10 Entry into substantive examination
SE01 Entry into force of request for substantive examination
C14 Grant of patent or utility model
GR01 Patent grant