CN109633425B - Action characteristic simulation device for vacuum on-load tap-changer of dry-type transformer - Google Patents
Action characteristic simulation device for vacuum on-load tap-changer of dry-type transformer Download PDFInfo
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- CN109633425B CN109633425B CN201811426046.4A CN201811426046A CN109633425B CN 109633425 B CN109633425 B CN 109633425B CN 201811426046 A CN201811426046 A CN 201811426046A CN 109633425 B CN109633425 B CN 109633425B
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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
- G01R31/327—Testing of circuit interrupters, switches or circuit-breakers
- G01R31/3277—Testing of circuit interrupters, switches or circuit-breakers of low voltage devices, e.g. domestic or industrial devices, such as motor protections, relays, rotation switches
- G01R31/3278—Testing of circuit interrupters, switches or circuit-breakers of low voltage devices, e.g. domestic or industrial devices, such as motor protections, relays, rotation switches of relays, solenoids or reed switches
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Abstract
The invention discloses a device for simulating the action characteristics of a vacuum on-load tap-changer of a dry-type transformer, which relates to the technical field of the vacuum on-load tap-changer of the dry-type transformer, and comprises a tap fixed contact relay J1, a tap moving contact relay J2, a tap switching vacuum relay K1, a tap switching vacuum relay K2 and a transition resistor R1, wherein the transition resistor R1 and the actual transition resistor applied on site are both 3 omega, and the action time of the vacuum relays K1 and K2 is shorter than that of the vacuum switch applied on site. The simulation device and the vacuum on-load tap-changer have the same parameters, can completely reflect the action characteristics of the vacuum tap-changer applied on site, and is used for verifying the characteristic test method and inspecting the characteristic test device.
Description
Technical Field
The invention relates to the technical field of testing of a vacuum on-load tap-changer of a dry-type transformer, in particular to a device for simulating the action characteristic of the vacuum on-load tap-changer of the dry-type transformer.
Background art:
in order to meet the development requirements of power grids, dry-type on-load tap-changer transformers are generally adopted in power utilization systems of ultra-high and extra-high voltage transformer substations, the voltage grade of the station transformer is mostly 35kV or below, and therefore dry-type vacuum on-load tap-changers are mostly adopted for voltage adjustment to guarantee power supply quality. The conventional method is mainly suitable for testing the oil-immersed mechanical tap changer, the mechanical switch action time is long, the vacuum tap changer action time is short, the previous transition process is not completed, the other vacuum bag starts to act, and the conventional method cannot effectively detect the action characteristic of the vacuum on-load tap changer.
In order to research a testing method of the action characteristics of the vacuum on-load tap-changer and check and verify the testing device of the action characteristics of the vacuum on-load tap-changer, the invention designs a simulation device of the action characteristics of the vacuum on-load tap-changer of the dry-type transformer, which realizes the simulation of the action process of the vacuum on-load tap-changer and the setting of the action characteristic parameters by controlling the on-off and switching sequence of a vacuum bag of the vacuum on-load tap-changer through programs and provides equipment for the verification of the testing method of the vacuum on-load tap-changer and the check of the testing device.
Disclosure of Invention
The invention aims to provide a device for simulating the action characteristics of a vacuum on-load tap-changer of a dry-type transformer, which aims to solve the defects in the prior art.
A simulation device for the action characteristics of a vacuum on-load tap changer of a dry-type transformer comprises a tap fixed contact relay J1, a tap moving contact relay J2, a tap switching vacuum relay K1, a tap switching vacuum relay K2 and a transition resistor R1, wherein two pairs of contacts on the tap fixed contact relay J1 are respectively connected with a tap 1, a tap 2, a tap 3 and a tap 4, a middle contact A11 and an intermediate contact A12 of the tap fixed contact relay J1 are respectively electrically connected with two normally open contacts on a tap moving contact relay J2, the contact A12 is also electrically connected with a moving contact on the tap switching vacuum relay K2, one end of the transition resistor R1 is electrically connected with the normally open contact of the tap switching vacuum relay K2, and the other end A21 is respectively electrically connected with the normally closed contact of the moving contact relay J2 and the tap 3; the moving contact G11 and the moving contact G12 of the tap moving contact relay J2 are respectively electrically connected with contacts at two ends of a tapping switching vacuum relay K1; the tap 2 is electrically connected with a fixed contact A22 on a tap moving contact relay J2.
Preferably, the tap moving contact relay J2 is switched to the tap position when the action is finished, and the tap fixed contact relay J1 is selected in an analog mode when the action is finished.
Preferably, the parameter of the transition resistance R1 is 3 omega/10W.
Preferably, the tap moving contact relay J1 and the tap moving contact relay J2 are both LJQX-38F in model number.
Preferably, the tap changing vacuum relay K1 and the tap changing vacuum relay K2 are both JPK-21.
The invention has the advantages that: the transition resistance R1 and the actual transition resistance of the field application are both 3 omega, and the action time of the vacuum relays K1 and K2 is shorter than that of the vacuum switches of the field application. The simulation device and the vacuum on-load tap-changer have the same parameters, can completely reflect the action characteristics of the vacuum tap-changer applied on site, and is used for verifying the characteristic test method and inspecting the characteristic test device.
Drawings
FIG. 1 is a schematic diagram of an initial state circuit of the simulation apparatus of the present invention.
FIG. 2 is a diagram of a second step of the simulation of the present invention.
FIG. 3 is a diagram of a third step of the simulation of the present invention.
FIG. 4 is a diagram of a fourth step of the simulation of the present invention.
FIG. 5 is a diagram illustrating a fifth step of simulation according to the present invention.
FIG. 6 is a diagram illustrating a sixth step of the simulation of the present invention.
FIG. 7 is a diagram illustrating a seventh step of the simulation according to the present invention.
Detailed Description
In order to make the technical means, the creation characteristics, the achievement purposes and the effects of the invention easy to understand, the invention is further described with the specific embodiments.
As shown in fig. 1, a simulation device for the action characteristics of a vacuum on-load tap changer of a dry-type transformer comprises a tap fixed contact relay J1, a tap moving contact relay J2, a tap switching vacuum relay K1, a tap switching vacuum relay K2 and a transition resistor R1, two pairs of contacts on the tap fixed contact relay J1 are respectively connected with a tap 1, a tap 2, a tap 3 and a tap 4, the intermediate contacts A11 and A12 of the tap fixed contact relay J1 are respectively electrically connected with two normally open contacts on the tap movable contact relay J2, the A12 is also electrically connected with a moving contact on a tapping switching vacuum relay K2, one end of the transition resistor R1 is electrically connected with a normally open contact of the tapping switching vacuum relay K2, and the other end A21 is respectively electrically connected with a normally closed contact of a tap moving contact relay J2 and a tap 3; the moving contact G11 and the moving contact G12 of the tap moving contact relay J2 are respectively electrically connected with contacts at two ends of a tapping switching vacuum relay K1; the tap 2 is electrically connected with a fixed contact A22 on a tap moving contact relay J2.
It is noted that the tap moving contact relay J2 is actuated to switch the tap position, and the tap fixed contact relay J1 is actuated to select the tap simulation.
In this embodiment, the movable contacts G11 and G12 of the tap movable contact relay J2 are electrically connected to the contacts at both ends of the tap changing vacuum relay K1, respectively.
In the present embodiment, the tap 2 is electrically connected to the fixed contact a22 of the tap moving contact relay J2.
In the present embodiment, the transition resistance R1 has a parameter of 3 Ω/10W.
In the embodiment, the tap moving contact relay J1 and the tap moving contact relay J2 are both LJQX-38F in type.
In the present embodiment, the tap changing vacuum relay K1 and tap changing vacuum relay K2 are each model JPK-21.
Embodiments of the present apparatus are described in detail below with reference to the accompanying drawings:
example 1
As shown in fig. 1, the tap changer works in the second tap, the tap changer does not start to act, and the load current flows out from the tap 2, the fixed contact a22, the movable contact G12, the tap switching vacuum relay K1, the movable contact G11, the fixed contact a21 and the tap 3;
example 2
As shown in fig. 2, the tap fixed contact relay J1 is activated, the odd tap is switched from the third tap (tap 4, tap 3) to the first tap (tap 2, tap 1), and at this time, the load current flows out from tap 2, fixed contact a22, movable contact G12, tap switching vacuum relay K1, movable contact G11, fixed contact a21 and tap 3;
example 3
As shown in fig. 3, the tap switching vacuum relay K2 operates, and since the transition resistor R1 is connected to the vacuum relay K2, the load current continues to flow out from the tap 2, the fixed contact a22, the movable contact G12, the tap switching vacuum relay K1, the movable contact G11, the fixed contact a21, and the tap 3;
example 4
As shown in fig. 4, the tap changing vacuum relay K1 is activated, G12 and G11 are disconnected, and the load current flows out through the tap 2, the tap changing vacuum relay K2, the transition resistor R1 and the tap 3;
example 5
As shown in fig. 5, the tap fixed contact relay J2 operates to disconnect the movable contacts G11 and G12 from the fixed contacts a22 and a21 and connect the movable contacts G11 and G12 with the fixed contacts a11 and a12, and at this time, the load current continues to flow out from the tap 2, the tap switching vacuum relay K2, the transition resistor R1 and the tap 3;
example 6
As shown in fig. 6, the tap changing vacuum relay K1 is activated again, G12 and G11 are connected, and at this time, the load current flows out from tap 2, fixed contact a12, movable contact G12, tap changing vacuum relay K1, movable contact G11, fixed contact a11 and tap 1, and a circulating current exists among the tap changing vacuum relay K2, fixed contact a12, movable contact G12, tap changing vacuum relay K1, movable contact G11, fixed contact a11, tap 1, tap 3 and transition resistor R1, and the transformer is prevented from being burnt out due to the short circuit of the coil inside the transformer by the bridging of the transition resistor R1;
example 7
As shown in fig. 7, the tap changing vacuum relay K2 is actuated again to disconnect the tap changing vacuum relay K2 from the transition resistor R1, and at this time, the load current flows out from the tap 2, the fixed contact a12, the movable contact G12, the tap changing vacuum relay K1, the movable contact G11, the fixed contact a11, and the tap 1, and at this time, the tap switch is actuated, and the switching of a tap process is completed.
It will be appreciated by those skilled in the art that the invention may be embodied in other specific forms without departing from the spirit or essential characteristics thereof. The embodiments disclosed above are therefore to be considered in all respects as illustrative and not restrictive. All changes which come within the scope of or equivalence to the invention are intended to be embraced therein.
Claims (5)
1. A simulation device for the action characteristics of a vacuum on-load tap changer of a dry type transformer comprises a tap fixed contact relay J1, a tap moving contact relay J2, a tap switching vacuum relay K1, a tap switching vacuum relay K2 and a transition resistor R1, it is characterized in that two pairs of contacts on the tap fixed contact relay J1 are respectively connected with a tap 1, a tap 2, a tap 3 and a tap 4, the intermediate contacts A11 and A12 of the tap fixed contact relay J1 are respectively electrically connected with two normally open contacts on the tap movable contact relay J2, the A12 is also electrically connected with a moving contact on a tapping switching vacuum relay K2, one end of the transition resistor R1 is electrically connected with a normally open contact of the tapping switching vacuum relay K2, and the other end A21 is respectively electrically connected with a normally closed contact of a tap moving contact relay J2 and a tap 3;
the moving contact G11 and the moving contact G12 of the tap moving contact relay J2 are respectively electrically connected with contacts at two ends of a tapping switching vacuum relay K1;
the tap 2 is electrically connected with a fixed contact A22 on a tap moving contact relay J2.
2. The simulation device for the action characteristic of the vacuum on-load tap-changer of the dry-type transformer according to claim 1, wherein: when the action of the tap moving contact relay J2 is finished, the position of a tap is switched, and when the action of the tap fixed contact relay J1 is finished, the tap is selected in an analog mode.
3. The simulation device for the action characteristic of the vacuum on-load tap-changer of the dry-type transformer according to claim 1, wherein: the parameter of the transition resistance R1 is 3 omega/10W.
4. The simulation device for the action characteristic of the vacuum on-load tap-changer of the dry-type transformer according to claim 1, wherein: the tap moving contact relay J1 and the tap moving contact relay J2 are both LJQX-38F in model number.
5. The simulation device for the action characteristic of the vacuum on-load tap-changer of the dry-type transformer according to claim 1, wherein: the models of the tapping switch vacuum relay K1 and the tapping switch vacuum relay K2 are JPK-21.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811426046.4A CN109633425B (en) | 2018-11-27 | 2018-11-27 | Action characteristic simulation device for vacuum on-load tap-changer of dry-type transformer |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201811426046.4A CN109633425B (en) | 2018-11-27 | 2018-11-27 | Action characteristic simulation device for vacuum on-load tap-changer of dry-type transformer |
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| CN109633425A CN109633425A (en) | 2019-04-16 |
| CN109633425B true CN109633425B (en) | 2020-12-01 |
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