CN106199306A - A kind of system and method for loop state monitoring device is tested - Google Patents
A kind of system and method for loop state monitoring device is tested Download PDFInfo
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- CN106199306A CN106199306A CN201610512720.5A CN201610512720A CN106199306A CN 106199306 A CN106199306 A CN 106199306A CN 201610512720 A CN201610512720 A CN 201610512720A CN 106199306 A CN106199306 A CN 106199306A
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- state
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- loop state
- circuit
- short circuit
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/50—Testing of electric apparatus, lines, cables or components for short-circuits, continuity, leakage current or incorrect line connections
Abstract
The present invention relates to a kind of system and method for testing loop state monitoring device, described system includes: auxiliary current source, for providing input current for current transformer unit；Current transformer unit, for providing secondary current according to input current for loop state analogue unit；Control unit, carries out state setting for receiving the loop state pre-set and the loop state pre-set according to described reception to loop state analogue unit；Loop state analogue unit, for being simulated the described loop state pre-set according to secondary current；And verification unit, receive, from loop state monitoring device, the loop state measured and loop state and the described loop state pre-set of described measurement are compared, and the function of described loop state monitoring device is verified by comparative result.
Description
Technical field
The invention belongs to unit check field, and relate more specifically to a kind of for loop state monitoring device is carried out
The system and method for inspection.
Background technology
Current transformer is the visual plant in power system.Owing to the biggest electric current standard to secondary small area analysis can be realized
Really conversion, therefore current transformer is the important step of electric energy metrical.Electrically connecting from current transformer outfan to electric energy meter
Connect part and be referred to as secondary circuit.The running status of current transformer body and secondary circuit will have a strong impact on the accurate of electric energy metrical
Property.Accordingly, it would be desirable to the running status of the secondary circuit of current transformer is monitored.Secondary for monitoring current transformer
The running status in loop, some R&D institutions and enterprise-like corporation have developed can accurate measurements secondary circuit running status monitoring dress
Put.This monitoring device can realize the states such as normal connection operating to secondary circuit, open circuit, short circuit and accurately identify.
But, for this monitoring device, how testing the high efficiency of its function and reliability is prior art
In and an open question.Generally, this inspection should not be carried out by the operation of physical device.Therefore, in this case,
A lot of abnormal operating conditions of secondary circuit may not have or time of occurrence is indefinite, so that inspection does not have feasible
Property.
Summary of the invention
At present, a lot of abnormal operating conditions of secondary circuit may not have or time of occurrence is indefinite, so that
Inspection does not have feasibility.Therefore, in order to the function of secondary loop of mutual inductor monitoring running state device is tested,
Need to provide a kind of system and method for loop state monitoring device is tested, in order to the merit of inspection monitoring device
And the management and control to monitoring device quality can be improved.
According to an aspect of the present invention, it is provided that a kind of system for loop state monitoring device is tested, institute
The system of stating includes:
Auxiliary current source, for providing input current for current transformer unit；
Current transformer unit, for providing secondary current according to input current for loop state analogue unit；
Control unit, for receiving the loop state pre-set and the loop state pre-set according to described reception
Loop state analogue unit is carried out state setting；
Loop state analogue unit, for being simulated the described loop state pre-set according to secondary current；With
And
Verification unit, receives the loop state measured and by the loop state of described measurement from loop state monitoring device
Compare with the described loop state pre-set, and the function of described loop state monitoring device is carried out by comparative result
Verification.
Preferably, described loop state monitoring device carries out loop state detection to determine for loop state analogue unit
The loop state measured, and the loop state of described measurement is sent to verification unit.
Preferably, wherein said current transformer unit includes: has the single current transformer of multiple no-load voltage ratio, or has
Multiple current transformers of different no-load voltage ratios.
Preferably, wherein said loop state analogue unit includes following any one or more: secondary circuit terminal is short
Connect state simulation module, secondary circuit open-circuit condition analog module, loop concatenation rectifying installation state simulation module and the shortest
Connect state simulation module.
Preferably, wherein said secondary circuit terminal short circuit state simulation module includes: normally opened relay and binding post；
Wherein connect described normally opened relay at the two ends of described binding post, and controlled described normally opened relay by described control unit
The adhesive of device and disconnection.
Preferably, wherein said secondary circuit open-circuit condition analog module includes: normally closed relay and binding post；Wherein
Described normally closed relay is accessed in a series arrangement secondary circuit, and is controlled described normally closed relay by described control unit
Disconnect and adhesive.
Preferably, concatenation rectifying installation state simulation module in wherein said loop includes: the normally closed relay being connected in parallel
And diode；Wherein the normally closed relay being connected in parallel and diode are accessed secondary circuit in a series arrangement as entirety, and
And disconnection and the adhesive of described normally closed relay is controlled by control unit.
Preferably, a described short circuit state simulation module includes: normally opened relay and short circuit wire；Wherein by described often
Open relay is connected across the two ends of a wire of current transformer punching, and is controlled described normally opened relay by control unit
Adhesive and disconnection.
Preferably, wherein said control unit includes: secondary circuit terminal short circuit control module, secondary circuit open circuit controls
Module, loop concatenation rectifying installation control module and a short circuit status control module.
Preferably, the loop state wherein pre-set includes following any one or more: secondary circuit terminal short circuit
State, secondary circuit open-circuit condition, loop concatenation rectifying installation state or a short circuit state.
According to a further aspect in the invention, it is provided that a kind of method for loop state monitoring device is tested, institute
The method of stating includes:
Input current is provided；
By described input current through current transformer cell translation be secondary current；
Receive the loop state pre-set and the loop state that described reception pre-sets is sent to loop state
Analogue unit；
According to secondary current, the described loop state pre-set is simulated；And
The loop state measured is received and by the loop state of described measurement and described pre-from loop state monitoring device
The loop state first arranged compares, and the function of described loop state monitoring device is verified by comparative result.
The present invention can be by comparing the loop state of measurement and the loop state pre-set, to loop state
The detection function of monitoring device verifies.This mode can verify that the function of monitoring device and improves monitoring device matter
The management and control of amount.
Accompanying drawing explanation
In order to be illustrated more clearly that the embodiment of the present invention or technical scheme of the prior art, below will be to embodiment or existing
In having technology to describe, the required accompanying drawing used is briefly described.It should be evident that the accompanying drawing in describing below is only this
Some embodiments of invention, for those of ordinary skill in the art, on the premise of not paying creative work, it is also possible to
Other accompanying drawing is obtained according to these accompanying drawings.
Fig. 1 is that the structure to the system that loop state monitoring device is tested according to the preferred embodiment for the present invention is shown
It is intended to；
Fig. 2 is the structural representation of the secondary circuit terminal short circuit state simulation module according to the preferred embodiment for the present invention
Figure；
Fig. 3 is the structural representation of the secondary circuit open-circuit condition analog module according to the preferred embodiment for the present invention；
Fig. 4 is the structural representation of the loop concatenation rectifying installation state simulation module according to the preferred embodiment for the present invention
Figure；And
Fig. 5 is the structural representation of a short circuit state simulation module according to the preferred embodiment for the present invention；And
Fig. 6 is the flow process to the method that loop state monitoring device is tested according to the preferred embodiment for the present invention
Figure.
Detailed description of the invention
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is carried out clear, complete
Describe, it is clear that described embodiment is only a part of embodiment of the present invention rather than whole embodiments wholely.Based on
Embodiment in the present invention, it is every other that those of ordinary skill in the art are obtained under not making creative work premise
Embodiment, broadly falls into the scope of protection of the invention.
Elaborate a lot of detail in the following description so that fully understanding the present invention, but the present invention is all right
Using other to be different from alternate manner described here to implement, those skilled in the art can be without prejudice to intension of the present invention
In the case of do similar popularization, therefore the present invention is not limited by following public specific embodiment.
Secondly, the present invention combines schematic diagram and is described in detail, when describing the embodiment of the present invention in detail, for purposes of illustration only, table
The profile of showing device structure can be disobeyed general ratio and be made partial enlargement, and described schematic diagram is example, and it should not at this
Limit the scope of protection of the invention.Additionally, length, width and the three-dimensional space of height should be comprised in actual fabrication.
Below in conjunction with the accompanying drawings the detailed description of the invention of the present invention is described in further detail.
Fig. 1 is the knot of the system 100 testing loop state monitoring device according to the preferred embodiment for the present invention
Structure schematic diagram.As an embodiment of the invention, system 100 utilizes the mould being simulated for different secondary loop state
Block, and according to control instruction carry out secondary circuit terminal short circuit state, secondary circuit open-circuit condition, loop concatenation rectification set
The simulation of the standby secondary circuit state such as state and a short circuit state, it is achieved that to current transformer under the conditions of different no-load voltage ratios
Carry out the simulation of secondary circuit state.
As it is shown in figure 1, system 100 includes: the simulation of auxiliary current source 101, current transformer unit 102, loop state is single
Unit 103, control unit 105 and verification unit 106.Normally, loop state monitoring device 104 is positioned at system 100 outside.Can
Alternatively, loop state monitoring device 104 can also be positioned at system 100 inside.Preferably, auxiliary current source 101 is for for electric
Current transformer unit 102 provides input current.Generally, in order to loop state monitoring device is tested, generally to simulate two
The running status of minor loop.To this end, generally utilize auxiliary current source 101 to provide the input current for simulation.Preferably, for
Thering is provided input current to various loop state simulation experiments, auxiliary current source 101 such as can select 0.5 grade have feedback to set
The normalized current source put.Generally, the output electric current in this normalized current source is 100A to the maximum.
Preferably, current transformer unit 102 is for providing secondary electricity according to input current for loop state analogue unit
Stream.Current transformer unit 102 can use two ways: a kind of mode is that current transformer unit 102 is for having multiple change
The single current transformer of ratio, therefore it can switch between multiple no-load voltage ratios；And another way is Current Mutual Inductance
Device unit 102 is made up of the multiple independent current transformer with different no-load voltage ratio, these current transformers have independent and
Different no-load voltage ratio so that current transformer unit 102 can switch between multiple current transformers.
Preferably, in order to improve the scope of application of system 100, need system 100 all energy under the conditions of different no-load voltage ratios normal
Operation.To this end, current transformer unit 102 preferably has different no-load voltage ratio.Specific implementation can be foregoing two
The mode of kind, it is also possible to be other suitable mode, as long as it enables to current transformer unit 102 has different no-load voltage ratio i.e.
Can.Preferably, no-load voltage ratio can be following several: 30:5,50:5,100:5,300:5,500:5 and 1500:5.Wherein, electric current is mutual
0.5 grade of low-voltage current mutual inductor that sensor 102 preferentially selects low-voltage current mutual inductor, such as rated voltage to be 400V.Preferably,
System 100 can be used for the different secondary circuit state of secondary current transformer and can be received back to line state monitoring device 104
Testing result under different secondary circuit states.System 100 is simply easily achieved, and can be widely used for current transformer two
Minor loop condition checkout gear is tested.
Preferably, loop state analogue unit 103 is for entering the described loop state pre-set according to secondary current
Row simulation.Loop state analogue unit 103 includes: secondary circuit terminal short circuit state simulation module, secondary circuit open-circuit condition
Analog module, loop concatenation rectifying installation state simulation module and a short circuit state simulation module.Wherein secondary circuit terminal
Short circuit state simulation module, secondary circuit open-circuit condition analog module, loop concatenation rectifying installation state simulation module and once
Short circuit state simulation module corresponds respectively to the four kinds of states of secondary loop of mutual inductor for simulation: secondary circuit terminal
Short circuit state, secondary circuit open-circuit condition, loop concatenation rectifying installation state or a short circuit state.Certainly, current transformer
The state of the secondary circuit of unit is not limited to these four, it is also possible to be to be likely to occur in other secondary loop of mutual inductor
State.
In other words, according to the preferred embodiment of the present invention, in order to simulate the state of above-mentioned four kinds of secondary circuits, loop
State simulation unit 103 correspondingly includes that secondary circuit terminal short circuit state simulation module, secondary circuit open-circuit condition simulate mould
Block, loop concatenation rectifying installation state simulation module and a short circuit state simulation module.Additionally, in order to control above-mentioned simulation mould
Block, control unit 105 correspondingly includes: secondary circuit terminal short circuit control module, secondary circuit open circuit control module, loop string
Connect rectifying installation control module and a short circuit status control module.
Preferably, secondary circuit terminal short circuit state simulation module includes: normally opened relay and binding post.Wherein, exist
The two ends of described binding post connect described normally opened relay, and are controlled described normally opened relay by described control unit 105
Adhesive and disconnection, thus simulate beginning and the end of short circuit event.That is, for secondary circuit terminal short circuit state, mould
Plan process is: by terminal two ends connect normally opened relay, and by control part control its adhesive and disconnect simulate once
The beginning of this state and end.Correspondingly, Fig. 2 is the secondary circuit terminal short circuit state mould according to the preferred embodiment for the present invention
Intend the structural representation of module.As in figure 2 it is shown, secondary circuit terminal short circuit analog module includes normally opened relay and terminals
Son.Secondary circuit terminal short circuit analog module by connecting normally opened relay at terminal two ends, and is controlled its suction by control part
Close and disconnect beginning and the end simulating short-circuit condition.In order to this state simulation is better achieved, relay is the most satisfied
Rated current 5A.Wherein, the model that relay can select is more, as long as its performance indications meet previously described rated current
Deng parameter index, such as, can select JRX-13F-1 well known to those skilled in the art.
Preferably, secondary circuit open-circuit condition analog module includes: normally closed relay and binding post.Wherein, by described
Normally closed relay accesses secondary circuit in a series arrangement, and by described control unit control described normally closed relay disconnection and
Adhesive, thus simulate beginning and the end of open circuit event.That is, for secondary circuit open-circuit condition, simulation process is: pass through
Normally closed relay is concatenated in secondary circuit, and by control part controls its disconnection and this state is simulated once in adhesive
And end.Correspondingly, Fig. 3 is the structural representation of the secondary circuit open-circuit condition analog module according to the preferred embodiment for the present invention
Figure.As it is shown on figure 3, secondary circuit OPEN-LOOP SIMULATION module includes a normally closed relay and binding post.Secondary circuit open circuit shape
State analog module by secondary circuit concatenate normally closed relay, and by control part control its disconnect and adhesive simulate out
The beginning of line state and end.It is to say, secondary circuit OPEN-LOOP SIMULATION module includes a normally closed relay and binding post,
Normally closed relay is serially connected in secondary circuit.In order to this state simulation is better achieved, this relay preferably meets specified electricity
Stream 5A.Wherein, the model that relay can select is more, as long as its performance indications meet the parameters such as previously described rated current
Index, such as, can select JRX-13F-1 well known to those skilled in the art.
Preferably, concatenation rectifying installation state simulation module in loop includes: the normally closed relay being connected in parallel and diode.
Wherein the normally closed relay being connected in parallel and diode are accessed in a series arrangement as entirety secondary circuit, and single by controlling
Beginning and the end of concatenation rectifying installation event is simulated in the disconnection of the unit 105 described normally closed relay of control and adhesive.That is, for
For secondary circuit concatenation rectifying installation state, simulation process is: by concatenating in secondary circuit by a normally closed relay
The unit composed in parallel with rectifying installation is simulated, control part control its disconnection and opening of this state is simulated once in adhesive
Begin and terminate.Correspondingly, Fig. 4 is the knot of the loop concatenation rectifying installation state simulation module according to the preferred embodiment for the present invention
Structure schematic diagram.As shown in Figure 4, loop concatenation rectifying installation analog module includes normally closed relay and diode, both and joint group
Become module.Further, secondary circuit concatenates this module, control part control its disconnection and adhesive is simulated concatenation rectification and set
The beginning of standby state and end.In order to this state simulation is better achieved, this diode preferably meets rated current 5A.Its
In, the model that relay and diode can select is more, as long as its performance indications meet the ginsengs such as previously described rated current
Number index, such as relay can select JRX-13F-1 well known to those skilled in the art；And diode can select
FR807。
Preferably, one time short circuit state simulation module includes: normally opened relay and short circuit wire, wherein normally opened continues described
Electrical equipment is connected across the two ends of a wire of current transformer punching, and is controlled described normally opened relay by control unit 105
Adhesive and disconnect and simulate beginning and the end of a short circuit event.That is, for a short circuit state, simulation process
For: simulate by a normally opened relay being connected across wire two ends of current transformer punching, by controlling part control
Make its adhesive and disconnect beginning and the end simulating once this state.Correspondingly, Fig. 5 is according to the preferred embodiment for the present invention
The structural representation of a short circuit state simulation module.As it is shown in figure 5, a short circuit state simulation module includes normally opened relay
Device and short circuit wire, by being connected across wire two ends of current transformer punching, by controlling part control by normally opened relay
Make its adhesive and disconnect beginning and the end simulating a short circuit state.It is to say, a short circuit state simulation module bag
Include a normally opened relay and short circuit wire, a normally opened relay is connected across a wire two of current transformer punching
End.Wherein, the model that relay can select is more, refers to as long as its performance indications meet the parameters such as previously described rated current
Mark, such as, can select JRX-13F-1 well known to those skilled in the art.
Preferably, control unit 105 is for receiving the loop state pre-set and pre-setting according to described reception
Loop state loop state analogue unit is carried out state setting.As described above, in order to simulate above-mentioned secondary circuit terminal
Short circuit state, secondary circuit open-circuit condition, loop concatenation rectifying installation state or a short circuit state these four secondary circuit
State, loop state analogue unit 103 correspondingly includes secondary circuit terminal short circuit state simulation module, secondary circuit open circuit shape
State analog module, loop concatenation rectifying installation state simulation module and a short circuit state simulation module.Further, in order to control
Making above-mentioned analog module, control unit 105 is wrapped and is correspondingly included: the open circuit control of secondary circuit terminal short circuit control module, secondary circuit
Molding block, loop concatenation rectifying installation control module and a short circuit status control module.
Preferably, the simulation of each state is based on what the instruction of control unit operated, such as, sent out by control unit
Instruction is sent to control beginning and the end of each emulation mode.For control unit 105, realizing of its modules is permissible
Use the mode that single-chip microcomputer and control circuit combine.Wherein, single-chip microcomputer may select AT8951, and control circuit can use three poles
Pipes etc. drive element.As a preferred implementation, control unit includes one piece of main control MCU (model selects AT8951), makes
4 kinds of loop state analog modules are controlled respectively by 4 output channels.Owing to JRX-generally selected by the relay of rear end analog module
13F-1 type relay, working power 12VDC, MCU output port connect pull-up resistor and connect transistor base and by three poles
The action of management and control relay, it is therefore desirable to the control relay circuit that 4 tunnels are identical.Preferably, secondary circuit terminal short circuit control
Molding block, secondary circuit open circuit control module, loop concatenation rectifying installation control module and a short circuit status control module are divided
It is not used for controlling secondary circuit terminal short circuit state simulation module, secondary circuit open-circuit condition analog module, loop concatenation rectification
Equipment state analog module and a short circuit state simulation module.
Preferably, verification unit 106 receives the loop state measured and by described measurement from loop state monitoring device
Loop state and the described loop state pre-set compare, and comparative result is to described loop state monitoring device
Function verify.By this comparison, verification unit 106 is checked the function of loop state monitoring device and improves returning
The management and control of line state monitoring device quality.
Preferably, loop state monitoring device 104 carries out loop state detection to determine for loop state analogue unit
The loop state measured, and the loop state of described measurement is sent to verification unit 106.Generally, loop state prison
Surveying device 104 is the monitoring device for accurate measurements secondary circuit running status.It is right that loop state monitoring device 104 can realize
The states such as the operating normal connection of secondary circuit, open circuit, short circuit accurately identify.According to the embodiment of the present invention, electricity
The secondary circuit of current transformer unit includes four kinds of states: secondary circuit terminal short circuit state, secondary circuit open-circuit condition, loop
Concatenation rectifying installation state or a short circuit state.Loop state monitoring device 104 can be for secondary circuit terminal short circuit shape
State, secondary circuit open-circuit condition, loop concatenation rectifying installation state or a short circuit state are monitored, and detection are obtained
Result as being sent to verification unit 106.
By above description analog and correspondingly analogy method, those skilled in the art can realize different no-load voltage ratio bar
Under part, current transformer is carried out the simulation of its secondary circuit state, thus coordinates the operation of monitoring device, it is possible to achieve to prison
Survey the inspection of the several functions of device.These functions such as include the normal connection of secondary loop of mutual inductor, short circuit, open circuit
With states such as short circuits.
Fig. 6 is the stream of the method 600 testing loop state monitoring device according to the preferred embodiment for the present invention
Cheng Tu.As an embodiment of the invention, method 600 according to control instruction carry out secondary circuit terminal short circuit state,
Secondary circuit open-circuit condition, the simulation of the loop concatenation secondary circuit state such as rectifying installation state and a short circuit state, real
Show the simulation that under the conditions of different no-load voltage ratios, current transformer is carried out secondary circuit state.
As shown in Figure 6, method 600 is from the beginning of step 601 place.In step 601, use auxiliary current source is current transformer
Unit provides input current.Generally, in order to loop state monitoring device is tested, the operation of secondary circuit to be simulated
State.To this end, generally utilize auxiliary current source to provide the input current for simulation.Preferably, in order to various loops shape
Morphotype draft experiment provides input current, and auxiliary current source such as can select 0.5 grade to have the normalized current source that feedback is arranged.Logical
Often, the output electric current in this normalized current source is 100A to the maximum.
Preferably, in step 602, current transformer unit is utilized to carry for loop state analogue unit according to input current
For secondary current.Current transformer unit can use two ways: a kind of mode is that current transformer unit is multiple for having
The single current transformer of no-load voltage ratio, therefore it can switch between multiple no-load voltage ratios；And another way is that electric current is mutual
Sensor cell is made up of the multiple independent current transformer with different no-load voltage ratio, and these current transformers have independent and not
Same no-load voltage ratio so that current transformer unit can switch between multiple current transformers.
Preferably, in order to improve the scope of application of method 600, need method 600 all energy under the conditions of different no-load voltage ratios normal
Operation.To this end, current transformer unit preferably has different no-load voltage ratio.Specific implementation can be foregoing two kinds of sides
Formula, it is also possible to be other suitable mode, as long as it enables to current transformer unit has different no-load voltage ratio.Preferably
Ground, no-load voltage ratio can be following several: 30:5,50:5,100:5,300:5,500:5 and 1500:5.Wherein, current transformer is preferential
The 0.5 grade of low-voltage current mutual inductor selecting low-voltage current mutual inductor, such as rated voltage to be 400V.
Preferably, in step 603, receive the loop state pre-set and the loop shape described reception pre-set
State is sent to loop state analogue unit.Loop state analogue unit includes: secondary circuit terminal short circuit state simulation module, two
Minor loop open-circuit condition analog module, loop concatenation rectifying installation state simulation module and a short circuit state simulation module.Its
Middle secondary circuit terminal short circuit state simulation module, secondary circuit open-circuit condition analog module, loop concatenation rectifying installation state
Analog module and a short circuit state simulation module correspond respectively to four kinds of shapes for the secondary loop of mutual inductor simulated
State: secondary circuit terminal short circuit state, secondary circuit open-circuit condition, loop concatenation rectifying installation state or a short circuit state.
Certainly, the state of the secondary circuit of current transformer is not limited to these four, it is also possible to be other secondary loop of mutual inductor
In the state that is likely to occur.
In other words, according to the preferred embodiment of the present invention, in order to simulate the state of above-mentioned four kinds of secondary circuits, loop
State simulation unit correspondingly include secondary circuit terminal short circuit state simulation module, secondary circuit open-circuit condition analog module,
Loop concatenation rectifying installation state simulation module and a short circuit state simulation module.
Preferably, in step 604, according to secondary current, the described loop state pre-set is simulated.Generally, return
Line state monitoring device is for the monitoring device of the accurately running status of detection secondary circuit.Loop state monitoring device can realize
The states such as normal connection operating to secondary circuit, open circuit, short circuit accurately identify.According to the embodiment of the present invention,
The secondary circuit of current transformer includes four kinds of states: secondary circuit terminal short circuit state, secondary circuit open-circuit condition, loop are gone here and there
Connect rectifying installation state or a short circuit state.Loop state monitoring device can for secondary circuit terminal short circuit state, two
Minor loop open-circuit condition, loop concatenation rectifying installation state or a short circuit state are monitored, and knot detection obtained
Fruit is sent to verification unit.
Preferably, in step 605, the loop state measured is received and by described measurement from loop state monitoring device
Loop state and the described loop state pre-set compare, and comparative result is to described loop state monitoring device
Function verifies.As described above, in order to simulate above-mentioned secondary circuit terminal short circuit state, secondary circuit open-circuit condition, return
Road concatenation rectifying installation state or the state of a short circuit state these four secondary circuit, loop state analogue unit correspondingly wraps
Include secondary circuit terminal short circuit state simulation module, secondary circuit open-circuit condition analog module, loop concatenation rectifying installation state
Analog module and a short circuit state simulation module.Further, in order to control above-mentioned analog module, control unit includes: two
Minor loop terminal short circuit control module, secondary circuit open circuit control module, loop concatenation rectifying installation control module and the shortest
Connect status control module.
Preferably, the simulation of each state is based on what the instruction of control unit operated, such as, sent out by control unit
Instruction is sent to control beginning and the end of each emulation mode.Control unit receives the loop state pre-set and according to institute
State and receive the loop state that pre-sets loop state analogue unit is carried out state setting.Preferably, secondary circuit terminal is short
Connect control module, secondary circuit open circuit control module, loop concatenation rectifying installation control module and a short circuit state and control mould
Block is respectively used to control secondary circuit terminal short circuit state simulation module, secondary circuit open-circuit condition analog module, loop concatenation
Rectifying installation state simulation module and a short circuit state simulation module.
By above description analog and correspondingly analogy method, those skilled in the art can realize different no-load voltage ratio bar
Under part, current transformer is carried out the simulation of its secondary circuit state, thus coordinates the operation of monitoring device, it is possible to achieve to prison
Survey the inspection of the several functions of device.These functions such as include the normal connection of secondary loop of mutual inductor, short circuit, open circuit
With states such as short circuits.
Described above to the disclosed embodiments, makes professional and technical personnel in the field be capable of or uses the present invention.
Multiple amendment to these embodiments will be apparent from for those skilled in the art, as defined herein
General Principle can realize without departing from the spirit or scope of the present invention in other embodiments.Therefore, the present invention
It is not intended to be limited to the embodiments shown herein, and is to fit to and principles disclosed herein and features of novelty phase one
The widest scope caused.
Claims (19)
1., for the system testing loop state monitoring device, described system includes:
Auxiliary current source, for providing input current for current transformer unit；
Current transformer unit, for providing secondary current according to input current for loop state analogue unit；
Control unit, for receiving the loop state pre-set and the loop state pair pre-set according to described reception
Loop state analogue unit carries out state setting；
Loop state analogue unit, for being simulated the described loop state pre-set according to secondary current；And
Verification unit, receives the loop state measured and by the loop state of described measurement and institute from loop state monitoring device
State the loop state pre-set to compare, and according to comparative result, the function of described loop state monitoring device is carried out school
Test.
System the most according to claim 1, described loop state monitoring device is carried out back for loop state analogue unit
Line state detection is to determine the loop state of measurement, and the loop state of described measurement is sent to verification unit.
System the most according to claim 1, wherein said current transformer unit includes: have the single electricity of multiple no-load voltage ratio
Current transformer, or there are multiple current transformers of different no-load voltage ratio.
System the most according to claim 1, wherein said loop state analogue unit includes following any one or more:
Secondary circuit terminal short circuit state simulation module, secondary circuit open-circuit condition analog module, loop concatenation rectifying installation state mould
Intend module and a short circuit state simulation module.
System the most according to claim 4, wherein said secondary circuit terminal short circuit state simulation module includes: normally opened continue
Electrical equipment and binding post；Described normally opened relay is wherein connected at the two ends of described binding post, and by described control unit
Control adhesive and the disconnection of described normally opened relay.
System the most according to claim 4, wherein said secondary circuit open-circuit condition analog module includes: normally closed relay
And binding post；Wherein described normally closed relay is accessed in a series arrangement secondary circuit, and is controlled by described control unit
The disconnection of described normally closed relay and adhesive.
System the most according to claim 4, wherein said loop concatenation rectifying installation state simulation module includes: parallel connection is even
The normally closed relay connect and diode；Wherein the normally closed relay being connected in parallel and diode are connect in a series arrangement as entirety
Enter secondary circuit, and controlled disconnection and the adhesive of described normally closed relay by control unit.
System the most according to claim 4, a described short circuit state simulation module includes: normally opened relay and short circuit are led
Line；Wherein described normally opened relay is connected across the two ends of a wire of current transformer punching, and by control unit control
Make adhesive and the disconnection of described normally opened relay.
System the most according to claim 4, wherein said control unit includes: secondary circuit terminal short circuit control module,
Secondary circuit open circuit control module, loop concatenation rectifying installation control module and a short circuit status control module.
System the most according to claim 1, the loop state wherein pre-set includes following any one or more:
Secondary circuit terminal short circuit state, secondary circuit open-circuit condition, loop concatenation rectifying installation state or a short circuit state.
11. 1 kinds are used for the method testing loop state monitoring device, and described method includes:
Input current is provided；
By described input current through current transformer cell translation be secondary current；
Receive the loop state pre-set and the loop state that described reception pre-sets is sent to loop state simulation
Unit；
According to secondary current, the described loop state pre-set is simulated；And
The loop state measured is received and by the loop state of described measurement with described set in advance from loop state monitoring device
The loop state put compares, and the function of described loop state monitoring device is verified by comparative result.
12. methods according to claim 11, also include by loop state monitoring device for loop state analogue unit
Carry out loop state to detect with the loop state determining measurement.
13. methods according to claim 11, wherein said current transformer unit includes: have the single of multiple no-load voltage ratio
Current transformer, or there are multiple current transformers of different no-load voltage ratio.
14. methods according to claim 11, the most wherein said loop state analogue unit include following any one
Or multiple: secondary circuit terminal short circuit state simulation module, secondary circuit open-circuit condition analog module, loop concatenation rectifying installation
State simulation module and a short circuit state simulation module.
15. methods according to claim 14, wherein said secondary circuit terminal short circuit state simulation module includes: normally opened
Relay and binding post；Wherein connect described normally opened relay at the two ends of described binding post, and control described normally opened
The adhesive of relay and disconnection.
16. methods according to claim 14, wherein said secondary circuit open-circuit condition analog module includes: normally closed relay
Device and binding post；Wherein described normally closed relay is accessed in a series arrangement secondary circuit, and controls described normally closed relay
The disconnection of device and adhesive.
17. methods according to claim 14, wherein said loop concatenation rectifying installation state simulation module includes: in parallel
The normally closed relay connected and diode；Wherein using the normally closed relay being connected in parallel and diode as entirety in a series arrangement
Access secondary circuit, and control disconnection and the adhesive of described normally closed relay.
18. methods according to claim 14, a described short circuit state simulation module includes: normally opened relay and short circuit
Wire；Wherein described normally opened relay is connected across the two ends of a wire of current transformer punching, and control described often
The adhesive of open relay and disconnection.
19. methods according to claim 11, described in the loop state that pre-sets include following any one or more:
Secondary circuit terminal short circuit state, secondary circuit open-circuit condition, loop concatenation rectifying installation state or a short circuit state.
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| CN201610512720.5A CN106199306B (en) | 2016-07-01 | 2016-07-01 | System and method for checking loop state monitoring device |
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| CN201610512720.5A CN106199306B (en) | 2016-07-01 | 2016-07-01 | System and method for checking loop state monitoring device |
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