CN220570457U - Control cabinet for functional test of power transformer - Google Patents
Control cabinet for functional test of power transformer Download PDFInfo
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- CN220570457U CN220570457U CN202321137264.2U CN202321137264U CN220570457U CN 220570457 U CN220570457 U CN 220570457U CN 202321137264 U CN202321137264 U CN 202321137264U CN 220570457 U CN220570457 U CN 220570457U
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- 238000011990 functional testing Methods 0.000 title claims abstract description 20
- 238000012360 testing method Methods 0.000 claims abstract description 108
- 238000012544 monitoring process Methods 0.000 claims description 9
- 230000002159 abnormal effect Effects 0.000 claims description 7
- 238000005259 measurement Methods 0.000 claims description 3
- 230000000007 visual effect Effects 0.000 claims description 3
- 238000000034 method Methods 0.000 abstract 1
- 238000003745 diagnosis Methods 0.000 description 8
- 238000010586 diagram Methods 0.000 description 8
- 230000001276 controlling effect Effects 0.000 description 6
- 230000005540 biological transmission Effects 0.000 description 2
- 238000001514 detection method Methods 0.000 description 2
- 230000002633 protecting effect Effects 0.000 description 2
- 230000001105 regulatory effect Effects 0.000 description 2
- 239000003990 capacitor Substances 0.000 description 1
- 238000013461 design Methods 0.000 description 1
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Abstract
The utility model discloses a control cabinet for a functional test of a power transformer, secondary equipment of the power transformer is used as a tested unit, and the control cabinet comprises: the main power supply unit is connected to the power grid through a main power line and provides a main power supply for the control cabinet; the variable-frequency and variable-voltage power supply unit is electrically connected with the main power supply unit and is connected to the tested unit through a first cable; a single-phase alternating-current power supply unit electrically connected with the main power supply unit and connected to the tested unit through a second cable; the direct-current power supply unit is electrically connected with the main power supply unit and is connected to the tested unit through a third cable; the voltage regulator power supply unit is electrically connected with the main power supply unit and is connected to the tested unit through a fourth cable; and the measuring unit is connected to the tested unit of the power transformer and measures the output value of the tested unit, wherein the output value comprises a voltage value and/or a current value. The control cabinet reduces potential safety hazards existing in the test process and ensures the safety of operators.
Description
Technical Field
The utility model relates to the technical field of power transformers, in particular to a control cabinet for a function test of a power transformer.
Background
Devices for direct production, transmission and distribution of electrical energy in power plants and substations (for example, high-voltage circuit breakers, disconnectors, reactors, parallel compensation power capacitors, power cables, power transmission lines and buses) belong to primary devices, and the circuit formed by these devices connected according to a certain law is called primary wiring. The electric loop for monitoring, controlling, regulating and protecting the primary equipment is called a secondary loop, which is a circuit formed by connecting a secondary winding of a transformer, a measuring and monitoring instrument, a relay, an automatic device and the like through a control cable in an electric system and is used for controlling, protecting, regulating, measuring and monitoring all parameters and working conditions of all elements in the primary loop. As a power transformer that plays an important role in a transformer substation, it is necessary to test the secondary line function of the power transformer. The secondary line function test of the power transformer is to detect and system joint debugging of a secondary body wind control integrated cabinet, a switch control cabinet, a remote control cabinet, on-line monitoring and the like of the power transformer, and confirm whether related projects of products are qualified or not. At present, when a single power transformer is subjected to a functional test, a secondary body wind control integrated cabinet, a switch control cabinet, a remote control cabinet, on-line monitoring and the like are required to be connected one by a secondary line test operator through complex and complicated lines, and each item joint debugging detection is performed after the secondary body wind control integrated cabinet, the switch control cabinet, the remote control cabinet, the on-line monitoring and the like are electrified. The project occupies a large space, and has serious potential safety hazards due to complex circuits. In addition, two or three transformers of the same model need to be integrally subjected to joint debugging, so that the difficulty is higher, and the efficiency is low. At present, the secondary line function test of the power transformer is carried out by test operators, and the power transformer is connected in a relatively open place by utilizing a circuit breaker, a variable frequency power supply, a direct current power supply, a voltage regulator and the like through cables, and the test is carried out after the system is integrated. During the test, test operators have to shuttle in the field, confirm and check each line and debug each test equipment instrument. Because the circuit is complicated, the adopted instruments are more, faults frequently occur, the test duration is longer, the product detection is influenced, and the safety of test staff is endangered.
Disclosure of Invention
In view of the above, the utility model provides a control cabinet for a function test of a power transformer, which is used for testing the secondary line function of the power transformer, so that the potential safety hazard existing in the test is reduced, and the safety of test operators is ensured. In addition, the damage to the tested product caused by test faults and the like is reduced, and the product quality is ensured.
According to an embodiment of the present utility model, there is provided a control cabinet for a functional test of a power transformer, characterized in that the control cabinet includes: the main power supply unit is connected to a power grid through a main power line and provides a main power supply for the control cabinet; a variable frequency and variable voltage power supply unit electrically connected with the main power supply unit, and connected to a unit under test of the power transformer via a first cable; a single-phase alternating-current power supply unit electrically connected with the main power supply unit, and connected to a unit under test of the power transformer via a second cable; a direct current power supply unit electrically connected with the main power supply unit, and connected to a unit under test of the power transformer via a third cable; a voltage regulator power supply unit electrically connected with the main power supply unit, and connected to a unit under test of the power transformer via a fourth cable; and a measuring unit connected to the unit under test of the power transformer, and measuring an output value of the unit under test of the power transformer.
Preferably, a first cable is connected between the socket of the variable-frequency and variable-voltage power supply unit and the socket of the unit under test of the power transformer in a pluggable manner, a second cable is connected between the socket of the single-phase alternating-current power supply unit and the socket of the unit under test of the power transformer in a pluggable manner, a third cable is connected between the socket of the direct-current power supply unit and the socket of the unit under test of the power transformer in a pluggable manner, and a fourth cable is connected between the socket of the voltage regulator power supply unit and the socket of the unit under test of the power transformer in a pluggable manner.
Preferably, the control cabinet further comprises: the main power switch controls the electric connection state between the main power unit and the power grid according to the operation of a user; the variable frequency and variable voltage power supply switch controls the electric connection state between the variable frequency and variable voltage power supply unit and the tested unit of the power transformer according to the operation of a user; a single-phase alternating-current power switch controlling an electrical connection state between the single-phase alternating-current power supply unit and a unit under test of the power transformer according to an operation of a user; the direct-current power supply switch controls the electric connection state between the direct-current power supply unit and the tested unit of the power transformer according to the operation of a user; and the voltage regulator power switch controls the electric connection state between the voltage regulator power supply unit and the tested unit of the power transformer according to the operation of a user.
Preferably, the control cabinet further comprises: a parameter setting unit that receives output parameters set by a user for each of the variable-frequency and variable-voltage power supply unit, the single-phase alternating-current power supply unit, the direct-current power supply unit, and the voltage regulator power supply unit, and receives a threshold value set by a user for an output voltage and/or current of a unit under test of the power transformer; the control unit is used for controlling the output parameters of each of the variable-frequency and variable-voltage power supply unit, the single-phase alternating-current power supply unit, the direct-current power supply unit and the voltage regulator power supply unit according to the output parameters received by the parameter setting unit; a comparison unit that compares the threshold value received by the parameter setting unit with an output value of a unit under test of the power transformer measured by the measurement unit, and generates an alarm signal and/or a disconnection signal when the output value of the unit under test of the power transformer is greater than the threshold value; a diagnosis unit that is connected to the comparison unit and that diagnoses a cause of an abnormal condition that indicates that an output value of a unit under test of the power transformer is greater than the threshold value when a comparison result of the comparison unit is the abnormal condition; a protection switch connected to the comparison unit and the main power supply unit, and disconnecting the main power supply module from the power grid when the disconnection signal is received; and an alarm and display unit connected to the comparison unit and the diagnosis unit, and outputting an alarm signal in an audible or visual manner upon receiving the alarm signal, and displaying the cause diagnosed by the diagnosis unit.
Preferably, the threshold value includes a first threshold value and a second threshold value that is larger than the first threshold value, the comparison unit generates the alarm signal when the output value of the unit under test of the power transformer is larger than the first threshold value and smaller than the second threshold value, and the comparison unit generates the alarm signal and the off signal when the output value of the unit under test of the power transformer is larger than the second threshold value.
Preferably, the main power switch includes a first main power switch and a second main power switch, the first main power switch is a knob switch provided on the control cabinet, the second main power switch is an icon displayed on a touch panel of the control cabinet, and when the first main power switch is rotated to an on state and the second main power switch is touched to an on state, an electrical connection state between the main power unit and the power grid is in an electrical conduction state; the variable-frequency and variable-voltage power switch comprises a first variable-frequency and variable-voltage power switch and a second variable-frequency and variable-voltage power switch, the first variable-frequency and variable-voltage power switch is a knob switch arranged on the control cabinet, the second variable-frequency and variable-voltage power switch is an icon displayed on a touch panel of the control cabinet, and when the first variable-frequency and variable-voltage power switch is rotated to an on state and the second variable-frequency and variable-voltage power switch is touched to the on state, the electric connection state between the variable-frequency and variable-voltage power supply and a tested unit of the power transformer is in an electric conduction state; the single-phase alternating current power switch comprises a first single-phase alternating current power switch and a second single-phase alternating current power switch, the first single-phase alternating current power switch is a knob switch arranged on the control cabinet, the second single-phase alternating current power switch is an icon displayed on a touch panel of the control cabinet, and when the first single-phase alternating current power switch is rotated to an on state and the second single-phase alternating current power switch is touched to the on state, the electric connection state between the single-phase alternating current power and a tested unit of the power transformer is in an electric conduction state; the direct current power supply switch comprises a first direct current power supply switch and a second direct current power supply switch, the first direct current power supply switch is a knob switch arranged on the control cabinet, the second direct current power supply switch is an icon displayed on a touch panel of the control cabinet, and when the first direct current power supply switch is rotated to an on state and the second direct current power supply switch is touched to the on state, the electric connection state between the direct current power supply and a tested unit of the power transformer is in an electric conduction state; the voltage regulator power switch comprises a first voltage regulator power switch and a second voltage regulator power switch, wherein the voltage regulator power switch is a knob switch arranged on the control cabinet, the voltage regulator power switch is an icon displayed on a touch panel of the control cabinet, and when the first voltage regulator power switch is rotated to an on state and the second voltage regulator power switch is touched to the on state, the voltage regulator power supply and the tested unit of the power transformer are in an electric conduction state in an electric connection state.
Preferably, the tested unit of the power transformer comprises at least one of the following: the system comprises an air control integrated cabinet, a switch control cabinet, a remote control cabinet and an on-line monitoring unit.
Preferably, each of the variable frequency and variable voltage power supply unit, the single-phase alternating current power supply unit, and the direct current power supply unit is provided with 6 output circuits, and the voltage regulator power supply unit is provided with 2 output circuits.
Preferably, each output circuit of each of the variable frequency and variable voltage power supply unit, the single-phase alternating current power supply unit and the direct current power supply unit is provided with an independent closing and opening unit, and each output circuit of the voltage regulator power supply unit is provided with an independent closing and opening unit.
According to the scheme, the electrical control cabinet for the power transformer function test realizes the output of a variable-frequency and variable-voltage power supply, a direct-current power supply and a voltage regulator power supply, reduces potential safety hazards existing in the test, and ensures the safety of test operators. In addition, the damage to the tested product caused by test faults and the like is reduced, and the product quality is ensured.
Drawings
The above and other features and advantages of the present utility model will become more apparent to those of ordinary skill in the art by describing in detail preferred embodiments thereof with reference to the attached drawings in which:
fig. 1 shows a schematic diagram of the main components of a control cabinet for a functional test of a power transformer according to one embodiment of the utility model.
Fig. 2 shows a schematic diagram of additional components of a control cabinet for a functional test of a power transformer according to one embodiment of the utility model.
Fig. 3 shows a schematic diagram of a control cabinet according to an embodiment of the utility model in the case of a functional test of a power transformer using a variable frequency and variable voltage power supply.
Fig. 4 shows a schematic diagram of a control cabinet according to an embodiment of the utility model in the case of parameter setting.
In the above figures, the following reference numerals are used:
10: a control cabinet;
102: a main power supply unit;
104: a variable frequency and variable voltage power supply unit;
106: a single-phase alternating current power supply unit;
108: a DC power supply unit;
110: a voltage regulator power supply unit;
112: a measuring unit;
20: an additional part;
202: a parameter setting unit;
204: a control unit;
206: a comparison unit;
208: a diagnosis unit;
210: a protection switch;
212: an alarm and display unit;
a: a power grid;
b-1, B-2, B-3, B-4: and a tested unit.
Detailed Description
The present utility model will be further described in detail with reference to the following examples, in order to make the objects, technical solutions and advantages of the present utility model more apparent.
In order to make it possible to combine the embodiments and features of the embodiments in this application without conflict. The utility model will be described in detail below with reference to the drawings in connection with embodiments.
It is noted that all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs unless otherwise indicated.
In the present utility model, unless otherwise indicated, terms of orientation such as "upper, lower, top, bottom" are used generally with respect to the orientation shown in the drawings or with respect to the component itself in the vertical, upright or gravitational direction; also, for ease of understanding and description, "inner and outer" refers to inner and outer relative to the profile of each component itself, but the above-mentioned orientation terms are not intended to limit the present utility model.
Fig. 1 shows a schematic diagram of the main components of a control cabinet for a functional test of a power transformer according to one embodiment of the utility model. As shown in fig. 1, the control cabinet 10 includes: a main power supply unit 102 connected to a grid a (for example, the grid may be a utility grid) via a main power line, the main power supply unit providing a main power supply for the control cabinet; a variable frequency and variable voltage power supply unit 104 electrically connected to the main power supply unit, and connected to a unit under test B-1 of the power transformer via a first cable; a single-phase alternating-current power supply unit 106 electrically connected to the main power supply unit, and connected to the unit under test B-2 of the power transformer via a second cable; a direct current power supply unit 108 electrically connected to the main power supply unit, and connected to the unit under test B-3 of the power transformer via a third cable; a voltage regulator power supply unit 110 electrically connected to the main power supply unit and connected to the unit under test B-4 of the power transformer via a fourth cable; and a measuring unit 112 connected to the tested units B-1, B-2, B-3, B-4 of the power transformer, and measuring the output values of the tested units of the power transformer. Specifically, the first cable includes a quick connector that is connected to be able to be plugged between the socket of the variable-frequency and variable-voltage power supply unit and the socket of the unit under test of the power transformer, the second cable includes a quick connector that is connected to be able to be plugged between the socket of the single-phase ac power supply unit and the socket of the unit under test of the power transformer, the third cable includes a quick connector that is connected to be able to be plugged between the socket of the dc power supply unit and the socket of the unit under test of the power transformer, and the fourth cable includes a quick connector that is connected to be able to be plugged between the socket of the power supply unit and the socket of the unit under test of the power transformer. Although not shown in fig. 1, the control cabinet further includes a main power switch that controls an electrical connection state between the main power unit and the power grid (i.e., turns on or turns off an electrical connection between the main power unit and the power grid) according to an operation of a user; a variable frequency and variable voltage power supply switch that controls an electrical connection state between the variable frequency and variable voltage power supply unit and a unit under test of the power transformer (i.e., turns on an electrical connection between the variable frequency and variable voltage power supply unit and the unit under test of the power transformer, or turns off an electrical connection between the variable frequency and variable voltage power supply unit and the unit under test of the power transformer) according to an operation of a user; a single-phase ac power switch that controls an electrical connection state between the single-phase ac power unit and the unit under test of the power transformer (i.e., turns on or turns off an electrical connection between the single-phase ac power unit and the unit under test of the power transformer) according to an operation of a user; a direct current power supply switch that controls an electrical connection state between the direct current power supply unit and the unit under test of the power transformer (i.e., turns on or turns off an electrical connection between the direct current power supply unit and the unit under test of the power transformer) according to an operation of a user; and a voltage regulator power switch controlling an electrical connection state between the voltage regulator power supply unit and the unit under test of the power transformer (i.e., turning on an electrical connection between the voltage regulator power supply unit and the unit under test of the power transformer or turning off an electrical connection between the voltage regulator power supply unit and the unit under test of the power transformer) according to an operation of a user. Preferably, each of the main power switch, the variable frequency and variable voltage power switch, the single-phase alternating current power switch, the direct current power switch and the voltage regulator power switch can be realized by adopting a combination mode of a hardware switch and a software switch. For example, the main power switch includes a first main power switch, which is a knob switch provided on the control cabinet, and a second main power switch, which is an icon displayed on a touch panel of the control cabinet, and an electrical connection state between the main power unit and the power grid is in an electrical conduction state when the user rotates the first main power switch to an on state and touches the second main power switch to the on state; the variable frequency and variable voltage power switch comprises a first variable frequency and variable voltage power switch and a second variable frequency and variable voltage power switch, wherein the first variable frequency and variable voltage power switch is a knob switch arranged on the control cabinet, the second variable frequency and variable voltage power switch is an icon displayed on a touch panel of the control cabinet, and when the first variable frequency and variable voltage power switch is rotated to an on state and the second variable frequency and variable voltage power switch is touched to the on state, the electric connection state between the variable frequency and variable voltage power unit and a tested unit of the power transformer is in an electric conduction state; the single-phase alternating current power switch comprises a first single-phase alternating current power switch and a second single-phase alternating current power switch, wherein the first single-phase alternating current power switch is a knob switch arranged on the control cabinet, the second single-phase alternating current power switch is an icon displayed on a touch panel of the control cabinet, and when the first single-phase alternating current power switch is rotated to an on state and the second single-phase alternating current power switch is touched to the on state, the electric connection state between the single-phase alternating current power unit and a tested unit of the power transformer is in an electric conduction state; the direct-current power supply switch comprises a first direct-current power supply switch and a second direct-current power supply switch, the first direct-current power supply switch is a knob switch arranged on the control cabinet, the second direct-current power supply switch is an icon displayed on a touch panel of the control cabinet, and when the first direct-current power supply switch is rotated to an on state and the second direct-current power supply switch is touched to the on state, the electric connection state between the direct-current power supply unit and a tested unit of the power transformer is in an electric conduction state; the voltage regulator power switch comprises a first voltage regulator power switch and a second voltage regulator power switch, wherein the first voltage regulator power switch is a knob switch arranged on the control cabinet, the second voltage regulator power switch is an icon displayed on a touch panel of the control cabinet, and when the first voltage regulator power switch is rotated to an on state and the second voltage regulator power switch is touched to the on state, the electric connection state between the voltage regulator power unit and the tested unit of the power transformer is in an electric conduction state. The tested unit of the power transformer as shown in fig. 1 includes at least one of the following: the system comprises an air control integrated cabinet, a switch control cabinet, a remote control cabinet and an on-line monitoring unit. Furthermore, although in fig. 1, the test unit to which the variable frequency and variable voltage power supply unit is connected via the first cable, the test unit to which the single-phase alternating current power supply unit is connected via the second cable, the test unit to which the direct current power supply unit is connected via the third cable, and the test unit to which the voltage regulator power supply unit is connected via the fourth cable are respectively shown as separate test units B-1, B-2, B-3, and B-4 different from each other, it will be understood by those skilled in the art that the test units B-1, B-2, B-3, and B-4 may all be the same test unit, or at least two of the test units B-1, B-2, B-3, and B-4 may all be the same test unit, depending on test requirements and the specific circumstances of practical applications.
Fig. 2 shows a schematic diagram of additional components of a control cabinet for a functional test of a power transformer according to one embodiment of the utility model. As shown in fig. 2, the control cabinet further includes additional components 20, specifically including: a parameter setting unit 202 that receives output parameters set by a user for each of the variable-frequency and variable-voltage power supply unit, the single-phase alternating-current power supply unit, the direct-current power supply unit, and the voltage regulator power supply unit, and that receives a threshold value set by a user for an output voltage and/or current of a unit under test of the power transformer; a control unit 204 for controlling the output parameters of each of the variable frequency and variable voltage power supply unit, the single-phase alternating current power supply unit, the direct current power supply unit and the voltage regulator power supply unit according to the output parameters received by the parameter setting unit; a comparison unit 206 that compares the threshold value received by the parameter setting unit with the output value of the unit under test of the power transformer measured by the measurement unit, and generates an alarm signal and/or a disconnection signal when the output value of the unit under test of the power transformer is greater than the threshold value; a diagnosis unit 208 which is connected to the comparison unit and diagnoses a cause of an abnormal condition when the comparison result of the comparison unit is an abnormal condition indicating that the output value of the unit under test of the power transformer is greater than a threshold value; a protection switch 210 connected to the comparison unit and the main power unit, and disconnecting the main power module from the power grid when receiving the disconnection signal; and an alarm and display unit 212 connected to the comparison unit and the diagnosis unit, and outputting the alarm signal in an audible or visual manner when the alarm signal is received, and displaying the cause diagnosed by the diagnosis unit. Preferably, the threshold value set by the user may include a first threshold value and a second threshold value greater than the first threshold value, the comparison unit generating the alarm signal when the output value of the unit under test of the power transformer is greater than the first threshold value and less than the second threshold value, and the comparison unit generating the alarm signal and the off signal when the output value of the unit under test of the power transformer is greater than the second threshold value. In practical applications, the input of the main power unit is 380V,50hz,20kVA, the total output of the control cabinet is 300kVA, the output of the variable-frequency and variable-voltage power unit is 0V to 500V,400a, the output of the direct-current power unit is 0V to 300V,32a, and the output of the voltage regulator power unit is 380V,32a.
Fig. 3 shows a schematic diagram of a control cabinet according to an embodiment of the utility model in the case of a functional test of a power transformer using a variable frequency and variable voltage power supply. In fig. 3, taking variable frequency output as an example, a worker first ensures that a variable frequency and variable voltage power switch knob (i.e., a hardware switch of a variable frequency and variable voltage power supply) on the front side of a control cabinet is in an off state, connects a test cable to a tested device, and then connects a quick plug of the test cable to a socket on the left side of the corresponding test control cabinet (i.e., a socket of a variable frequency and variable voltage power supply unit). Then, the staff opens the variable frequency and voltage power supply switch knob on the front of the control cabinet, and selects the 'variable frequency and voltage power supply' picture on the screen, and then clicks the corresponding start button (i.e. the software switch of the variable frequency and voltage power supply), so as to provide power for the test. Through the design, a test operator inserts a main power line into a main power input socket, and a variable-frequency and variable-voltage power line is inserted into a variable-frequency and variable-voltage input socket or connected onto a circuit breaker; the direct-current power line is inserted into a direct-current power input socket; turning on a knob 'main control power supply' on the front side of the control cabinet; the test operation can be performed. For example, in the configuration shown in fig. 3, each of the variable frequency and variable voltage power supply unit, the single-phase alternating current power supply unit, and the direct current power supply unit is provided with 6 output circuits, and the voltage regulator power supply unit is provided with 2 output circuits. Therefore, the function test can be carried out on 2 to 3 transformers simultaneously. In addition, each output circuit of each of the variable frequency and variable voltage power supply unit, the single-phase alternating current power supply unit, and the direct current power supply unit may be further provided with an independent closing and opening unit, and each output circuit of the voltage regulator power supply unit is provided with an independent closing and opening unit. And a test operator can test the tested unit expected to be tested by clicking the corresponding closing and opening unit.
Fig. 4 shows a schematic diagram of a control cabinet according to an embodiment of the utility model in the case of parameter setting. As shown in fig. 4, in order to ensure safety, an emergency stop function is arranged on the front side of the control cabinet, a test alarm system is also designed, if parameters such as current, voltage and the like are abnormal, an alarm and display unit carries out fault alarm to protect the tested products and personnel, the alarm system can see alarm information by clicking an alarm and diagnosis on a touch screen, for example as shown in fig. 4, the solved fault can be reset by clicking "alarm reset", and an alarm parameter setting interface can be accessed by clicking "parameter setting".
According to the scheme, the control cabinet for the function test of the power transformer provided by the utility model realizes the output of the variable-frequency and variable-voltage power supply, the direct-current power supply and the voltage regulator power supply, reduces the potential safety hazard existing in the test and ensures the safety of test operators. In addition, the damage to the tested product caused by test faults and the like is reduced, and the product quality is ensured. In addition, the efficiency of the secondary line function test of the transformer is fundamentally improved, 2 to 3 secondary line function tests of the transformer can be simultaneously carried out, and the efficiency can be improved by 30 to 50 percent.
The foregoing description of the preferred embodiments of the utility model is not intended to be limiting, but rather is intended to cover all modifications, equivalents, alternatives, and improvements that fall within the spirit and scope of the utility model.
Claims (10)
1. A control cabinet (10) for functional testing of a power transformer, the secondary equipment of which is a unit under test (B-1, B-2, B-3, B-4), characterized in that it comprises:
a main power supply unit (102) connected to a power grid (a) via a main power line, the main power supply unit providing a main power supply for the control cabinet;
a variable frequency and variable voltage power supply unit (104) electrically connected to the main power supply unit, and the variable frequency and variable voltage power supply unit is connected to the unit under test (B-1, B-2, B-3, B-4) via a first cable;
a single-phase alternating-current power supply unit (106) electrically connected to the main power supply unit, and the single-phase alternating-current power supply unit is connected to the unit under test (B-1, B-2, B-3, B-4) via a second cable;
a direct current power supply unit (108) electrically connected to the main power supply unit, and the direct current power supply unit is connected to the unit under test (B-1, B-2, B-3, B-4) via a third cable;
a regulator power supply unit (110) electrically connected to the main power supply unit, and connected to the unit under test (B-1, B-2, B-3, B-4) via a fourth cable; and
and a measurement unit (112) connected to the unit under test and measuring an output value of the unit under test, wherein the output value comprises a voltage value and/or a current value.
2. The control cabinet for a functional test of a power transformer according to claim 1, wherein the first cable is connected to be pluggable between the socket of the variable-frequency and variable-voltage power supply unit and the socket of the unit under test, the second cable is connected to be pluggable between the socket of the single-phase alternating-current power supply unit and the socket of the unit under test, the third cable is connected to be pluggable between the socket of the direct-current power supply unit and the socket of the unit under test, and the fourth cable is connected to be pluggable between the socket of the voltage regulator power supply unit and the socket of the unit under test.
3. The control cabinet for a functional test of a power transformer of claim 1, further comprising:
a main power switch controlling an electrical connection state between the main power unit and the power grid according to a user's on or off operation;
the variable frequency and variable voltage power supply switch controls the electric connection state between the variable frequency and variable voltage power supply unit and the tested unit according to the on or off operation of a user;
a single-phase alternating-current power supply switch which controls an electrical connection state between the single-phase alternating-current power supply unit and the unit under test according to an on or off operation of a user;
a direct-current power supply switch which controls an electrical connection state between the direct-current power supply unit and the unit under test according to a user's on or off operation;
and the voltage regulator power switch controls the electric connection state between the voltage regulator power unit and the tested unit according to the on or off operation of a user.
4. The control cabinet for a functional test of a power transformer of claim 1, further comprising:
a parameter setting unit (202) that receives output parameters set by a user for each of the variable-frequency and variable-voltage power supply unit, the single-phase alternating-current power supply unit, the direct-current power supply unit, and the voltage regulator power supply unit, and that receives a threshold value set by a user for an output voltage and/or current of the unit under test;
a control unit (204) for controlling the output parameters of each of the variable frequency and variable voltage power supply unit, the single-phase alternating current power supply unit, the direct current power supply unit and the voltage regulator power supply unit according to the output parameters received by the parameter setting unit;
a comparing unit (206) that compares the threshold value received by the parameter setting unit with the output value of the unit under test measured by the measuring unit, and generates an alarm signal and a disconnection signal when the output value of the unit under test of the power transformer is greater than the threshold value;
a diagnostic unit (208) which is connected to the comparing unit and diagnoses a cause of an abnormal condition that the output value of the unit under test is greater than the threshold value when the comparison result of the comparing unit indicates the abnormal condition;
-a protection switch (210) connected to the comparison unit and to the main power supply unit, and which, upon receipt of the disconnection signal, disconnects the main power supply unit from the electrical network; and
an alarm and display unit (212) connected to the comparing unit and the diagnosing unit, and outputting the alarm signal in an audible or visual manner upon receiving the alarm signal, and displaying the cause diagnosed by the diagnosing unit.
5. The control cabinet for a functional test of a power transformer of claim 4, wherein: the threshold value comprises a first threshold value and a second threshold value which is larger than the first threshold value, the comparison unit generates the alarm signal when the output value of the tested unit is larger than the first threshold value and smaller than the second threshold value, and the comparison unit generates the alarm signal and the disconnection signal when the output value of the tested unit is larger than the second threshold value.
6. A control cabinet for a functional test of a power transformer as claimed in claim 3, wherein:
the main power switch comprises a first main power switch and a second main power switch, the first main power switch is a knob switch arranged on the control cabinet, the second main power switch is an icon displayed on a touch panel of the control cabinet, and when the first main power switch is rotated to an on state and the second main power switch is touched to the on state, the electric connection state between the main power unit and the power grid is in an electric conduction state;
the variable frequency and variable voltage power switch comprises a first variable frequency and variable voltage power switch and a second variable frequency and variable voltage power switch, the first variable frequency and variable voltage power switch is a knob switch arranged on the control cabinet, the second variable frequency and variable voltage power switch is an icon displayed on a touch panel of the control cabinet, and when the first variable frequency and variable voltage power switch is rotated to an on state and the second variable frequency and variable voltage power switch is touched to the on state, the electric connection state between the variable frequency and variable voltage power unit and the tested unit is in an electric conduction state;
the single-phase alternating current power switch comprises a first single-phase alternating current power switch and a second single-phase alternating current power switch, the first single-phase alternating current power switch is a knob switch arranged on the control cabinet, the second single-phase alternating current power switch is an icon displayed on a touch panel of the control cabinet, and when the first single-phase alternating current power switch is rotated to an on state and the second single-phase alternating current power switch is touched to the on state, the electric connection state between the single-phase alternating current power unit and the tested unit is in an electric conduction state;
the direct current power supply switch comprises a first direct current power supply switch and a second direct current power supply switch, the first direct current power supply switch is a knob switch arranged on the control cabinet, the second direct current power supply switch is an icon displayed on a touch panel of the control cabinet, and when the first direct current power supply switch is rotated to an on state and the second direct current power supply switch is touched to the on state, the electric connection state between the direct current power supply unit and the tested unit is in an electric conduction state;
the voltage regulator power switch comprises a first voltage regulator power switch and a second voltage regulator power switch, wherein the first voltage regulator power switch is a knob switch arranged on the control cabinet, the second voltage regulator power switch is an icon displayed on a touch panel of the control cabinet, and when the first voltage regulator power switch is rotated to an on state and the second voltage regulator power switch is touched to the on state, the electric connection state between the voltage regulator power unit and the tested unit is in an electric conduction state.
7. The control cabinet for a functional test of a power transformer of claim 1, wherein the unit under test comprises at least one of: the system comprises an air control integrated cabinet, a switch control cabinet, a remote control cabinet and an on-line monitoring unit.
8. The control cabinet for a functional test of a power transformer according to claim 1, wherein each of the variable frequency and variable voltage power supply unit, the single-phase alternating current power supply unit, and the direct current power supply unit is provided with 6 output circuits, and the voltage regulator power supply unit is provided with 2 output circuits.
9. The control cabinet for a functional test of a power transformer according to claim 8, wherein each output circuit of each of the variable frequency and variable voltage power supply unit, the single-phase alternating current power supply unit, and the direct current power supply unit is provided with an independent closing and opening unit, and each output circuit of the voltage regulator power supply unit is provided with an independent closing and opening unit.
10. The control cabinet for a functional test of a power transformer according to claim 1, wherein the input of the main power supply unit is 380V,50hz,20kVA, the total output of the control cabinet is 300kVA, the output of the variable frequency and variable voltage power supply unit is 0V to 500V,400a, the output of the direct current power supply unit is 0V to 300V,32a, and the output of the voltage regulator power supply unit is 380V,32a.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321137264.2U CN220570457U (en) | 2023-05-09 | 2023-05-09 | Control cabinet for functional test of power transformer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321137264.2U CN220570457U (en) | 2023-05-09 | 2023-05-09 | Control cabinet for functional test of power transformer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220570457U true CN220570457U (en) | 2024-03-08 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202321137264.2U Active CN220570457U (en) | 2023-05-09 | 2023-05-09 | Control cabinet for functional test of power transformer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220570457U (en) |
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2023
- 2023-05-09 CN CN202321137264.2U patent/CN220570457U/en active Active
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