CN105487018A - Testing device, electric inverse cutting cabinet and testing system of converter - Google Patents
Testing device, electric inverse cutting cabinet and testing system of converter Download PDFInfo
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- CN105487018A CN105487018A CN201510809587.5A CN201510809587A CN105487018A CN 105487018 A CN105487018 A CN 105487018A CN 201510809587 A CN201510809587 A CN 201510809587A CN 105487018 A CN105487018 A CN 105487018A
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- 238000012360 testing method Methods 0.000 title claims abstract description 64
- 238000009434 installation Methods 0.000 claims description 35
- 238000004804 winding Methods 0.000 claims description 24
- 238000010438 heat treatment Methods 0.000 claims description 9
- 238000001816 cooling Methods 0.000 claims description 4
- 238000000034 method Methods 0.000 abstract description 26
- 238000010586 diagram Methods 0.000 description 14
- 206010014357 Electric shock Diseases 0.000 description 10
- 230000005284 excitation Effects 0.000 description 4
- 230000009931 harmful effect Effects 0.000 description 4
- 238000012545 processing Methods 0.000 description 4
- 229910000831 Steel Inorganic materials 0.000 description 3
- 238000004146 energy storage Methods 0.000 description 3
- 239000010959 steel Substances 0.000 description 3
- 238000004891 communication Methods 0.000 description 2
- 240000001439 Opuntia Species 0.000 description 1
- 230000002159 abnormal effect Effects 0.000 description 1
- 239000003086 colorant Substances 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000012549 training Methods 0.000 description 1
Classifications
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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
- G01R31/40—Testing power supplies
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- Testing Electric Properties And Detecting Electric Faults (AREA)
Abstract
The embodiment of the invention discloses a testing device, an electrical reverse cutting cabinet and a testing system of a current transformer. The testing arrangement of converter includes controller, first subassembly and the second subassembly that opens circuit, wherein: the first circuit-breaking assembly is connected between a power grid and a first converter to be tested in series, and the second circuit-breaking assembly is connected between the power grid and a second converter to be tested in series; the controller is respectively connected with the first circuit breaking assembly and the second circuit breaking assembly and is used for controlling only one of the first circuit breaking assembly and the second circuit breaking assembly to be in a closed state, and the other one of the first circuit breaking assembly and the second circuit breaking assembly to be in an open state. By adopting the embodiment of the invention, the safety of the converter in the switching process can be improved.
Description
Technical field
The present invention relates to technical field of wind power, particularly a kind of current transformer proving installation, electrically cut cabinet and test macro.
Background technology
Current transformer is the electric equipment that the voltage of power-supply system, frequency, the number of phases and/or other electrical parameters or characteristic are changed, current transformer usually in grid-connected system for carrying out rectification and inversion process to the electric current of input, with by during after process, the electric energy that obtains is connected to the grid.
In grid-connected system, the output terminal of power supply is connected with the input end of current transformer, the output terminal access electrical network of current transformer.In actual applications, usually certification and test can be carried out to the performance of current transformer, also the exchange study of current transformer test can be carried out by above-mentioned grid-connected system, when needs switch between above-mentioned two kinds of sights, the input end of the output terminal of power supply and the first current transformer to be measured is needed to disconnect, output terminal and the electrical network of the first current transformer to be measured disconnect, then, between power supply with electrical network, another current transformer (as the second current transformer etc.) is connected by artificial mode.
At least there is following problem in the hand-off process of aforementioned current transformer: when switching between above-mentioned two kinds of sights, needs to switch current transformer by artificial mode, and be connected with input end by its corresponding output terminal, thus can cause the danger of electric shock.
Summary of the invention
Embodiments of the invention provide a kind of proving installation of current transformer, electrically cut cabinet and test macro, by the first open circuit component string is associated between electrical network and the first current transformer to be measured, and the second open circuit component string is associated between electrical network and the second current transformer to be measured, and control the first open circuit assembly by controller or the second open circuit assembly is in closure state, to control switching on and off of the grid-connected loop of difference, thus improve the security in current transformer test process.
For achieving the above object, The embodiment provides a kind of proving installation of current transformer.This proving installation comprises controller, the first open circuit assembly and the second open circuit assembly, wherein:
Described first open circuit component string is associated between electrical network and described first current transformer to be measured, and described second open circuit component string is associated between described electrical network and described second current transformer to be measured; Described controller is connected with described first open circuit assembly and described second open circuit assembly respectively, for control in described first open circuit assembly, described second open circuit assembly only one of them is in closure state, another is in off-state.
For achieving the above object, The embodiment provides one and electrically cutting cabinet, comprising the proving installation of above-mentioned current transformer.
For achieving the above object, The embodiment provides a kind of test macro, comprising the first current transformer to be measured, above-described embodiment provides electrically cuts cabinet, the second current transformer to be measured, power supply and electrical network, wherein:
Described first current transformer to be measured and described second current transformer to be measured respectively with described power sources in series; Describedly electrically cut cabinet and be connected between described first current transformer to be measured and described electrical network respectively, and between described second current transformer to be measured and described electrical network, to be communicated with described electrical network or described second current transformer to be measured is communicated with described electrical network with described power supply for controlling described first current transformer to be measured and described power supply.
The proving installation of the current transformer that the embodiment of the present invention provides, electrically cut cabinet and test macro, by the first open circuit component string is associated between electrical network and the first current transformer to be measured, and the second open circuit component string is associated between electrical network and the second current transformer to be measured, then, by controller control in the first open circuit assembly and the second open circuit assembly only one of them is in closure state, another is in off-state, thus control the first current transformer to be measured and the second current transformer to be measured and mutually switch and be connected to the grid, the test in the grid-connected loop of current transformer can be completed based on the first open circuit assembly or the second open circuit assembly simultaneously, thus avoid the Danger Electric shock risk that causes during manual switching current transformer, improve the security in current transformer handoff procedure.
Accompanying drawing explanation
A kind of structural representation of the test macro of the current transformer that Fig. 1 provides for the embodiment of the present invention;
The another kind of structural representation of the test macro of the current transformer that Fig. 2 provides for the embodiment of the present invention;
The circuit diagram that is respectively connected of the current transformer that Fig. 3 provides for the embodiment of the present invention;
The Facad structure schematic diagram of the isolating switch that Fig. 4 provides for the embodiment of the present invention;
The connection diagram of the linear quadratic control protection circuit of the current transformer that Fig. 5 A provides for the embodiment of the present invention;
The connecting circuit schematic diagram of the isolating switch that Fig. 5 B provides for the embodiment of the present invention and linear quadratic control protection circuit;
The touch display interface schematic diagram of pilot lamp position in the linear quadratic control protection circuit of the current transformer that Fig. 6 provides for the embodiment of the present invention;
The Facad structure schematic diagram of the switching busbar that Fig. 7 provides for the embodiment of the present invention;
The side structure schematic diagram of the Two bors d's oeuveres busbar that Fig. 8 provides for the embodiment of the present invention;
The control circuit schematic diagram of the cooling system of the proving installation of the current transformer that Fig. 9 provides for the embodiment of the present invention;
What Figure 10 provided for the embodiment of the present invention appoints two-phase tension measuring circuit schematic diagram.
Marginal data:
1, the first current transformer 2, second to be measured current transformer to be measured
3, power supply 4, electrical network
5, proving installation 51, the controller of current transformer
52, the first isolating switch 521, first isolating switch
522, the second isolating switch 523, the 3rd isolating switch
53, the second isolating switch 531, the 4th isolating switch
532, the 5th isolating switch 533, the 6th isolating switch
6, step-up transformer 7, linear quadratic control protection circuit
8, input terminal 9, switching busbar
10, Two bors d's oeuveres busbar 11, through hole
12, heating radiator 121, radiator fan
122, switch 13, voltage measuring apparatus
Embodiment
The inventive concept of this programme is, by the first open circuit component string is associated between electrical network and the first current transformer to be measured, and the second open circuit component string is associated between electrical network and the second current transformer to be measured, then, by controller control in the first open circuit assembly and the second open circuit assembly only one of them is in closure state, another is in off-state, thus control the first current transformer to be measured and the second current transformer to be measured and mutually switch and be connected to the grid, the test in the grid-connected loop of current transformer can be completed based on the first open circuit assembly or the second open circuit assembly simultaneously, thus avoid the Danger Electric shock risk that causes during manual switching current transformer, improve the security in current transformer handoff procedure.
Be described in detail below in conjunction with the proving installation of accompanying drawing to embodiment of the present invention current transformer.
Embodiment one
Fig. 1 is a kind of structural representation of the test macro of the current transformer that the embodiment of the present invention provides.
As shown in Figure 1, the proving installation 5 of current transformer is for the test in the grid-connected loop of current transformer, the grid-connected loop of this current transformer comprises the first current transformer 1, second to be measured current transformer 2 to be measured, power supply 3 and electrical network 4, first current transformer 1 to be measured and the second current transformer 2 to be measured are connected between power supply 3 and electrical network 4 respectively, this proving installation comprises controller 51, first open circuit assembly 52 and the second open circuit assembly 53, wherein: the first open circuit assembly 52 is connected between electrical network 4 and the first current transformer 1 to be measured, the second open circuit assembly 53 is connected between electrical network 4 and the second current transformer 2 to be measured; Controller 51 is connected with the first open circuit assembly 52 and the second open circuit assembly 53 respectively, for control in the first open circuit assembly 52, second open circuit assembly 53 only one of them is in closure state, another is in off-state.
Wherein, the test in the grid-connected loop of current transformer can comprise the phase shortage test of current transformer and removal of load test etc., and the phase shortage test of current transformer can comprise single-phase continuity test, two-phase excitation test and three-phase and disconnect and testing.First open circuit assembly 52 or the second open circuit assembly 53 for closing, carrying and disconnect the electric current under normal loop condition, and can close, carrying and disconnect the switchgear of the electric current under abnormal loop condition in official hour.Power supply 3 can be direct supply or AC power.
Particularly, power supply 3, current transformer and electrical network 4 can be comprised in existing grid-connected system.By above-mentioned grid-connected system, certification and test are carried out to the performance of current transformer, also can be carried out the exchange study of current transformer test by above-mentioned grid-connected system, such as, to the training etc. of new employee.Like this, the test scene of current transformer type approval test can comprise two kinds, i.e. the authentication test scene of current transformer and exchange study scene.In order to carry out current transformer type approval test to the current transformer under different scene easily, the first open circuit assembly 52 or the second open circuit assembly 53 can be used to control the grid-connected loop that the current transformer under different scene is formed, thus the current transformer in the grid-connected loop of difference is tested.Wherein, as shown in Figure 1, current transformer 1 to be measured to first open circuit assembly 52 and first under a certain scene can be connected, second open circuit assembly 53 is connected with the current transformer 2 to be measured of second under another scene, particularly, when some test scenes in the authentication test scene being in current transformer and exchange study scene, the input end of the output terminal of power supply 3 with the first current transformer 1 to be measured is needed to be connected, the output terminal of the first current transformer 1 to be measured is connected with the input end of the first open circuit assembly 52, the output terminal access electrical network 4 of the first open circuit assembly 52, thus the first current transformer 1 to be measured is carried out to the test in grid-connected loop.When converting test scene, first open circuit assembly 52 can be disconnected, the grid-connected loop that power supply 3, first current transformer 1 to be measured and electrical network 4 are formed disconnects, meanwhile closed second open circuit assembly 53, thus make the grid-connected circuit communication that power supply 3, second current transformer 2 to be measured and electrical network 4 are formed, thus the second current transformer 2 to be measured is carried out to the test in grid-connected loop.Controller 51 is connected with the first open circuit assembly 52 and the second open circuit assembly 53 respectively, if the first open circuit assembly 52 is in closure state, now, user closes the second open circuit assembly 53, controller can control the first open circuit assembly 52 and still be in closure state, its grid-connected circuit communication formed, and the grid-connected loop that the second open circuit assembly 53 is formed still is in off-state, until user disconnects the first open circuit assembly 52.
First open circuit assembly 52 and the second open circuit assembly 53 can comprise multiple switchgear, carry out current transformer type approval test by the closed of switchgear and disconnection, such as phase shortage test and load dump test etc.For three-phase electricity, each phase can connect a switchgear, by closed or cut-off switch equipment, can make correspondingly to be connected into grid-connected loop mutually, thus complete three to be conducted, the test such as one-way conduction, two-phase excitation and three-phase disconnection.
The proving installation of the current transformer that the embodiment of the present invention provides, by the first open circuit component string is associated between electrical network and the first current transformer to be measured, and the second open circuit component string is associated between electrical network and the second current transformer to be measured, then, by controller control in the first open circuit assembly and the second open circuit assembly only one of them is in closure state, another is in off-state, thus control the first current transformer to be measured and the second current transformer to be measured and mutually switch and be connected to the grid, the test in the grid-connected loop of current transformer can be completed based on the first open circuit assembly or the second open circuit assembly simultaneously, thus avoid the Danger Electric shock risk that causes during manual switching current transformer, improve the security in current transformer handoff procedure.
Embodiment two
Fig. 2 is the structural representation of another embodiment of the test macro of current transformer provided by the invention, and described embodiment can be considered another concrete implementation of Fig. 1.
As shown in Figure 2, the proving installation 5 of current transformer is for the test in the grid-connected loop of current transformer, the grid-connected loop of this current transformer comprises the first current transformer 1, second to be measured current transformer 2 to be measured, power supply 3 and electrical network 4, first current transformer 1 to be measured and the second current transformer 2 to be measured are connected between power supply 3 and electrical network 4 respectively, this proving installation comprises controller 51, first open circuit assembly 52 and the second open circuit assembly 53, wherein: the first open circuit assembly 52 is connected between electrical network 4 and the first current transformer 1 to be measured, the second open circuit assembly 53 is connected between electrical network 4 and the second current transformer 2 to be measured; Controller 51 is connected with the first open circuit assembly 52 and the second open circuit assembly 53 respectively, for control in the first open circuit assembly 52, second open circuit assembly 53 only one of them is in closure state, another is in off-state.
As shown in Figure 2, in existing grid-connected system, generally include power supply 3 (direct supply or AC power), current transformer, step-up transformer 6 and electrical network 4.When some scenes in the authentication test scene being in current transformer and exchange study scene, the input end of the output terminal of power supply 3 with the first current transformer 1 to be measured is needed to be connected, the output terminal of the first current transformer 1 to be measured is connected with the input end of the first open circuit assembly 52, the output terminal of the first open circuit assembly 52 is connected with the input end of step-up transformer 6, the output terminal access electrical network 4 of step-up transformer 6.When converting test scene, first open circuit assembly 52 can be disconnected, the grid-connected loop that power supply 3, first current transformer 1 to be measured, step-up transformer 6 and electrical network 4 are formed disconnects, meanwhile closed second open circuit assembly 53, thus make power supply 3, second current transformer 2 to be measured, step-up transformer 6 and electrical network 4 form grid-connected loop.
In addition, conveniently to the test in the grid-connected loop of current transformer, power supply 3 can for the power supply using wind power generating set to export.
In addition, for the comprise two windings first current transformer 1 to be measured and the second current transformer 2 to be measured, three-phase can be comprised in each winding, for this reason, a kind of optional process is provided in the embodiment of the present invention, specifically comprise: the first open circuit assembly 52 comprises the first isolating switch 521, second isolating switch 522 and the 3rd isolating switch 523, accordingly, first isolating switch 521 is connected with two in the first winding of the first current transformer 1 to be measured, and the second isolating switch 522 is connected with the residue in the first winding of the first current transformer 1 to be measured; 3rd isolating switch 523 and being respectively connected in the second winding of the first current transformer 1 to be measured.
Particularly, as shown in Figure 3, the input end of the first isolating switch 521 is connected with two in the first winding of the first current transformer 1 to be measured, the output terminal access electrical network 4 of the first isolating switch 521, the input end of the second isolating switch 522 is connected with the residue in the first winding, output terminal and the access electrical network 4 of the second isolating switch 522, by the closed of the first isolating switch 521 and the second isolating switch 522 with disconnect, one-way conduction can be carried out, two-phase excitation, three are conducted and the test such as three-phase disconnection, the input end of the 3rd isolating switch 523 is connected with each in the second winding, the output terminal access electrical network 4 of the 3rd isolating switch 523, by the closed of the 3rd isolating switch 523 and disconnection, three can be carried out be conducted and the test such as three-phase disconnection.
For the second open circuit assembly 53, its assembly composition can form identical with corresponding process with the assembly of the first open circuit assembly 52 with corresponding process, namely the second open circuit assembly 53 comprises the 4th isolating switch 531, the 5th isolating switch 532 and the 6th isolating switch 533, accordingly, 4th isolating switch 531 is connected with two in the first winding of the second current transformer 2 to be measured, and the 5th isolating switch 532 is connected with the residue in the first winding of the second current transformer 2 to be measured; 6th isolating switch 533 and being respectively connected in the second winding of the second current transformer 2 to be measured.Wherein, above-mentioned three isolating switchs can be identical with the connected mode described in the first open circuit assembly 52 with the connected mode of the second current transformer 2 to be measured, electrical network 4, see above-mentioned related content process, can not repeat them here.
In addition, in order to reduce short circuit, the harmful effect that power down etc. cause grid-connected loop, multiple linear quadratic control protection circuit 7 can be used to form controller 51, control with closed to make the disconnection of controller 51 to the first open circuit assembly 52 and the second open circuit assembly 53, the each isolating switch that can be in the first open circuit assembly 52 and the second open circuit assembly 53 arranges at least one input terminal 8, accordingly, the output terminal input terminal 8 corresponding thereto of linear quadratic control protection circuit 7 connects, for controlling the closed of respective circuit breakers and disconnecting, and the short circuit in grid-connected loop and/or power down are protected.
As shown in Figure 4, the top of each isolating switch in the first open circuit assembly 52 and the second open circuit assembly 53 is provided with one or more input terminal 8, each input terminal 8 can be provided with numbering, as 1-1, 2-1 or 3-1 etc., the number of input terminal 8 can be determined according to the number of the phase be connected with respective circuit breakers, such as, based on above-mentioned the first isolating switch 521 as shown in Figure 3, second isolating switch 522, 3rd isolating switch 523, 4th isolating switch 531, the setting of the 5th isolating switch 532 and the 6th isolating switch 533, first isolating switch 521 is connected to the two-phase in the first winding, therefore, first isolating switch 521 can be provided with two input terminals 8, as shown in Figure 4, accordingly, second isolating switch 522 can be provided with an input terminal 8, 3rd isolating switch 523 can be provided with three input terminals 8.In addition; can be each input terminal 8 and corresponding Control protection system is set; the circuit of each Control protection system is commonly referred to linear quadratic control protection circuit 7; then linear quadratic control protection circuit 7 schematic diagram of each Control protection system as shown in Figure 5A, can illustrate the connecting circuit schematic diagram of isolating switch and linear quadratic control protection circuit 7 in Fig. 5 B.Fig. 5 A comprises three pilot lamp, pilot lamp can be set to different colors, as the pilot lamp of three in Fig. 5 A is set to redness, green and yellow indicator lamp respectively, can be used for representing close a floodgate instruction, separating brake instruction or energy storage instruction etc.; Processing unit is used for the processing logic of completing user combined floodgate or sub-switching operation; M represents motor, for controlling the disconnection of the switch key of isolating switch with closed, avoids artificial directly touching switch key to cause Danger Electric shock risk; Also switch is comprised in Fig. 5 A; Rectangle frame in Fig. 5 A represents coil.Based on the linear quadratic control protection circuit 7 of such as Fig. 5 A; when user clicks combined floodgate or separating brake button; processing unit controls lighting or extinguishing of pilot lamp by corresponding processing logic; to show corresponding close a floodgate instruction or separating brake instruction to user; actuating motor performs and closes a floodgate or sub-switching operation simultaneously, thus completes the closed of isolating switch and disconnect.The touch display interface schematic diagram of pilot lamp position in the Control protection system circuit of the current transformer that Fig. 6 provides for the embodiment of the present invention.Fig. 6 can be the touch display interface of pilot lamp position in Fig. 5 A, this touch display interface can be divided into 7 row displays, instruction of closing a floodgate, separating brake instruction, electric energy-stored, energy storage instruction, chain contact, combined floodgate and separating brake can be comprised, wherein, electric energy-stored, close a floodgate and separating brake be respectively button, user carries out separating brake and closing operation by combined floodgate and separating brake two buttons, combined floodgate instruction, separating brake instruction and energy storage instruction can be respectively pilot lamp interface, and chain contact can be used for making to only have one to be in closure state in the first open circuit assembly 52 and the second open circuit assembly 53.
In addition, consider that the lead-in wire of the input end of the isolating switch in the first open circuit assembly 52 and the second open circuit assembly 53 is usually shorter, being unfavorable for that user is to the quick connection between equipment, can being transferred to needing two equipment connected by corresponding interconnecting device for this reason.This interconnecting device is specifically as follows switching busbar 9, and corresponding process comprises: switching busbar 9 is connected between the first open circuit assembly 52 and the first current transformer 1 to be measured, and/or, be connected between the second open circuit assembly 53 and the second current transformer 2 to be measured.
Particularly, multiple switching busbar 9 can be set, switching busbar 9 can as shown in Figure 7, and be connected with one end of switching busbar 9 with the lead-in wire of the input end of the isolating switch in the second open circuit assembly 53 by the first open circuit assembly 52, the other end is connected with the first current transformer 1 or the second to be measured current transformer 2 to be measured.
It should be noted that, oxidized in atmosphere for preventing switching busbar 9 from exposing for a long time, zinc-plated process can be carried out to its surface.In order to make to be in state of insulation between phase and phase, and avoid the intrusion of foreign matter to cause short trouble, each switching busbar 9 can overlap and have hot high pressure Heat-Shrinkable Tubings.
In addition, in order to meet different business demand (the test demand etc. as 6MW generator), switching busbar 9 can select Two bors d's oeuveres busbar 10, as shown in Figure 8.Two bors d's oeuveres busbar 10 comprises two symmetrical lists and spells busbar, and every side of Two bors d's oeuveres busbar 10 can comprise multiple through hole 11, and opposite side and the position of the plurality of through hole 11 symmetry are provided with through hole 11 for being connected with the first current transformer 1 or the second to be measured current transformer 2 to be measured.
In addition, also by switching busbar 9, the output terminal of the isolating switch in the first open circuit assembly 52 or the second open circuit assembly 53 can be connected with step-up transformer 6, to improve the security of the proving installation of current transformer.
In addition, consider that the proving installation 5 of this current transformer can produce a large amount of heat in the process of work, heating radiator 12 can be set for the proving installation 5 of this current transformer, concrete process comprises: the proving installation of this current transformer also comprises at least one heating radiator 12, and heating radiator 12 is for lowering the temperature for controller 51, first open circuit assembly 52, second open circuit assembly 53 and/or switching busbar 9.
Wherein, as shown in Figure 9, heating radiator 12 specifically can comprise radiator fan 121 and switch 122.
Particularly, Fig. 9 is the control circuit schematic diagram of the cooling system of the proving installation of the current transformer of the present embodiment.Wherein, the part in dotted line frame is heating radiator 12, and can comprise a radiator fan 121 and one in this dotted line frame for controlling the switch 122 of the normal work of radiator fan 121, in order to ensure the safety of operating personnel, switch 122 can select rotary switch.The cooling system comprising heating radiator 12 can use other power supply outside grid-connected system to power to it, and other power supplys can include but not limited to the AC power etc. of the 220V voltage in daily life.
In the process of carrying out phase shortage test and load dump test, can measure a certain phase or heterogeneous voltage, its metering circuit as shown in Figure 10, can record the voltage between any two-phase by the voltage measuring apparatus 13 (as voltage table etc.) in diagram.
The proving installation of the current transformer that the embodiment of the present invention provides, on the one hand, current transformer to be measured winding is connected with two isolating switchs, another winding is connected with an isolating switch, make user can carry out the test in the grid-connected loop of current transformer very easily, and by isolating switch controlling mutually the current transformer to be measured of access, improve the security in current transformer handoff procedure; On the other hand; in order to reduce the harmful effect that short circuit, power down etc. cause grid-connected loop; multiple linear quadratic control protection circuit can be set in controller; both the opening and closing of isolating switch can have been controlled by linear quadratic control protection circuit; can protect grid-connected loop again; thus avoid the Danger Electric shock risk that causes during manual switching current transformer; improve the security in current transformer handoff procedure; and; have employed Two bors d's oeuveres busbar in this proving installation to be interconnected between equipment; so that equipment is interconnected amongst one another, improve security.
Embodiment three
Based on identical technical conceive, the embodiment of the present invention additionally provides one and electrically cuts cabinet.This electrically cuts the proving installation 5 that cabinet comprises the current transformer provided in embodiment two.
Wherein, electrically cutting cabinet can comprise cabinet, and this cabinet can be rectangular parallelepiped, and its size can as long 2600 millimeters, high 2380 millimeters, wide 1500 millimeters.This cabinet can be made up of angle bar welded framework, and support bar uses channel-section steel to form, and channel-section steel also can be adopted to fix between the first open circuit assembly 52 and the second open circuit assembly 53 simultaneously.Electrically cutting the two-sided of cabinet has door, and one side three fan door, door-plate thickness can be 2.0 millimeters, and its top is provided with hangs mother, and bottom can be provided with channel-section steel, and sheet metal thickness can be 1.5 millimeters.
What the embodiment of the present invention provided electrically cuts cabinet, by the first open circuit component string is associated between electrical network and the first current transformer to be measured, and the second open circuit component string is associated between electrical network and the second current transformer to be measured, then, by controller control in the first open circuit assembly and the second open circuit assembly only one of them is in closure state, another is in off-state, thus control the first current transformer to be measured and the second current transformer to be measured and mutually switch and be connected to the grid, the test in the grid-connected loop of current transformer can be completed based on the first open circuit assembly or the second open circuit assembly simultaneously, thus avoid the Danger Electric shock risk that causes during manual switching current transformer, improve the security in current transformer handoff procedure.
Further, in the embodiment of the present invention, on the one hand, current transformer to be measured winding is connected with two isolating switchs, another winding is connected with an isolating switch, make user can carry out the test in the grid-connected loop of current transformer very easily, and by isolating switch controlling mutually the current transformer to be measured of access, improve the security in current transformer handoff procedure; On the other hand; in order to reduce the harmful effect that short circuit, power down etc. cause grid-connected loop; multiple linear quadratic control protection circuit can be set in controller; both the opening and closing of isolating switch can have been controlled by linear quadratic control protection circuit; can protect grid-connected loop again; thus avoid the Danger Electric shock risk that causes during manual switching current transformer; improve the security in current transformer handoff procedure; and; have employed Two bors d's oeuveres busbar in proving installation to be interconnected between equipment; so that equipment is interconnected amongst one another, improve security.
Embodiment four
Based on identical technical conceive, the embodiment of the present invention additionally provides a kind of test macro, as shown in Figure 1 or 2.This test macro comprises the first current transformer 1 to be measured, above-described embodiment three provides electrically cuts cabinet, the second current transformer 2 to be measured, power supply 3 and electrical network 4, wherein: the first current transformer 1 to be measured is connected with power supply 3 respectively with the second current transformer 2 to be measured; Electrically cutting cabinet to be connected on respectively between the first current transformer 1 to be measured and electrical network 4, and between the second current transformer 2 to be measured and electrical network 4, to be communicated with electrical network 4 or the second current transformer 2 to be measured is communicated with electrical network 4 with power supply 3 for controlling the first current transformer 1 to be measured and power supply 3.
Particularly, by electrically cutting the closed of isolating switch in the first open circuit assembly 52 in cabinet and the second open circuit assembly 53 and disconnecting, carry out one-way conduction, two-phase excitation, three is conducted and the test such as three-phase disconnection, to complete the test to the first current transformer 1 or the second to be measured current transformer 2 to be measured, corresponding process see the related content in embodiment two, can not repeat them here.
Wherein, power supply 3 can be the power supply using wind power generating set to export.
The test macro that the embodiment of the present invention provides, by the first open circuit component string of electrically cutting in cabinet is associated between electrical network and the first current transformer to be measured, and the second open circuit component string is associated between electrical network and the second current transformer to be measured, then, by controller control in the first open circuit assembly and the second open circuit assembly only one of them is in closure state, another is in off-state, thus control the first current transformer to be measured and the second current transformer to be measured and mutually switch and be connected to the grid, the test in the grid-connected loop of current transformer can be completed based on the first open circuit assembly or the second open circuit assembly simultaneously, thus avoid the Danger Electric shock risk that causes during manual switching current transformer, improve the security in current transformer handoff procedure.
Further, in the embodiment of the present invention, on the one hand, current transformer to be measured winding is connected with two isolating switchs, another winding is connected with an isolating switch, make user can carry out the test in the grid-connected loop of current transformer very easily, and by isolating switch controlling mutually the current transformer to be measured of access, improve the security in current transformer handoff procedure; On the other hand; in order to reduce the harmful effect that short circuit, power down etc. cause grid-connected loop; multiple linear quadratic control protection circuit can be set in controller; both the opening and closing of isolating switch can have been controlled by linear quadratic control protection circuit; can protect grid-connected loop again; thus avoid the Danger Electric shock risk that causes during manual switching current transformer; improve the security in current transformer handoff procedure; and; have employed Two bors d's oeuveres busbar in proving installation to be interconnected between equipment; so that equipment is interconnected amongst one another, improve security.
The above; be only the specific embodiment of the present invention, but protection scope of the present invention is not limited thereto, is anyly familiar with those skilled in the art in the technical scope that the present invention discloses; change can be expected easily or replace, all should be encompassed within protection scope of the present invention.Therefore, protection scope of the present invention should be as the criterion with the protection domain of described claim.
Claims (10)
1. a proving installation for current transformer, is characterized in that, comprising:
Controller (51), the first open circuit assembly (52) and the second open circuit assembly (53), wherein:
Described first open circuit assembly (52) is connected between electrical network (4) and the first current transformer to be measured (1), and described second open circuit assembly (53) is connected between electrical network (4) and the second current transformer to be measured (2); Described controller (51) is connected with described first open circuit assembly (52) and described second open circuit assembly (53) respectively, for control in described first open circuit assembly (52), described second open circuit assembly (53) only one of them is in closure state, another is in off-state.
2. proving installation according to claim 1, is characterized in that, described first open circuit assembly (52) comprises the first isolating switch (521), the second isolating switch (522) and the 3rd isolating switch (523), wherein,
Described first isolating switch (521) is connected with two in the first winding of described first current transformer to be measured (1), and described second isolating switch (522) is connected with the residue in the first winding of described first current transformer to be measured (1); Described 3rd isolating switch (523) and being respectively connected in the second winding of described first current transformer to be measured (1).
3. proving installation according to claim 1, is characterized in that, described second open circuit assembly (53) comprises the 4th isolating switch (531), the 5th isolating switch (532) and the 6th isolating switch (533), wherein,
Described 4th isolating switch (531) is connected with two in the first winding of described second current transformer to be measured (2), and described 5th isolating switch (532) is connected with the residue in the first winding of described second current transformer to be measured (2); Described 6th isolating switch (533) and being respectively connected in the second winding of described second current transformer to be measured (2).
4. the proving installation according to any one of claims 1 to 3, is characterized in that, the isolating switch in described first open circuit assembly (52) and described second open circuit assembly (53) comprises at least one input terminal (8); Described controller (51) is made up of multiple linear quadratic control protection circuit (7); the output terminal input terminal corresponding thereto (8) of described linear quadratic control protection circuit (7) connects, for controlling the closed of respective circuit breakers and disconnecting.
5. proving installation according to claim 4, is characterized in that, described proving installation also comprises switching busbar (9), is connected between described first open circuit assembly (52) and described first current transformer to be measured (1); And/or, be connected between described second open circuit assembly (53) and described second current transformer to be measured (2).
6. proving installation according to claim 5, is characterized in that, described switching busbar (9) is Two bors d's oeuveres busbar (10).
7. proving installation according to claim 6, it is characterized in that, described proving installation also comprises at least one heating radiator (12), and described heating radiator (12) is for being the cooling of described controller (51), described first open circuit assembly (52), described second open circuit assembly (53) and/or described switching busbar (9).
8. electrically cut a cabinet, it is characterized in that, comprise the proving installation (5) of the current transformer described in above-mentioned any one of power 1-7.
9. a test macro, is characterized in that, comprises the first current transformer to be measured (1), electrically cuts cabinet, the second current transformer to be measured (2), power supply (3) and electrical network (4) as claimed in claim 8, wherein:
Described first current transformer to be measured (1) is connected with described power supply (3) respectively with described second current transformer to be measured (2); Describedly electrically cut cabinet and be connected between described first current transformer to be measured (1) and described electrical network (4) respectively, and between described second current transformer to be measured (2) and described electrical network (4), to be communicated with described electrical network (4) or described second current transformer to be measured (2) is communicated with described electrical network (4) with described power supply (3) for controlling described first current transformer to be measured (1) and described power supply (3).
10. test macro according to claim 9, is characterized in that, described power supply (3) is the power supply using wind power generating set to export.
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| CN201510809587.5A CN105487018B (en) | 2015-11-19 | 2015-11-19 | Testing device, electric inverse cutting cabinet and testing system of converter |
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| CN201510809587.5A CN105487018B (en) | 2015-11-19 | 2015-11-19 | Testing device, electric inverse cutting cabinet and testing system of converter |
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| CN105487018B CN105487018B (en) | 2018-06-26 |
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| CN107677971A (en) * | 2017-10-20 | 2018-02-09 | 天津瑞能电气有限公司 | High-power converter comprehensive test platform |
| CN107860994A (en) * | 2017-10-20 | 2018-03-30 | 天津瑞能电气有限公司 | Marine total power water cooling current transformer test platform |
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| Publication number | Publication date |
|---|---|
| CN105487018B (en) | 2018-06-26 |
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