Transient response test phase selection closing short circuit control device and system

Abstract

The utility model relates to a transient response test phase selection closing short circuit control device and a transient response test phase selection closing short circuit control system. The transient response test phase selection closing short circuit control device comprises a synchronization unit, a circuit breaking unit and an oscillographic unit. The high-voltage capacitor voltage transformer has the advantages that in the transient response test process of the high-voltage capacitor voltage transformer, according to the IEC61869-5 and GB20840-5 standard requirements, the high-voltage capacitor voltage transformer is used for phase selection closing and opening short circuit between a high-voltage main loop and the ground, the closing precision can reach within 1 degree, the resolution can reach 0.2 degree, two or more high-voltage switches can be controlled to act cooperatively at the same time, and the reliability of the high-voltage capacitor voltage transformer is improved. Damage to the boosting transformer due to long-time grounding of the high-voltage power supply caused by misoperation of one high-voltage switch can be avoided; the device is simple in structure and low in investment cost, accurately determines angle opening, saves a large amount of test time, reduces the frequency of high-voltage grounding short circuit, and reduces the damage to the test transformer in the test process.

Description

Technical Field

[0001] The utility model relates to the technical field of transformer testing, and particularly relates to a transient response test phase selection closing short-circuit control device and system. Background Art

[0002] A capacitive voltage transformer is a special transformer specifically used for transmitting and transforming voltage information. Its main functions include: 1) transmitting voltage information to measuring instruments, meters, relay protection, and automatic control devices; 2) isolating the measuring, protection, and control devices from high voltage; 3) facilitating the miniaturization and standardization of measuring instruments, meters, relay protection, and control devices.

[0003] The transformer body of the voltage transformer applies the principle of electromagnetic induction to achieve the transmission and transformation of voltage information. During the transient response test of the capacitive voltage transformer, it is to evaluate the speed of the voltage transmitted to the secondary voltage when the primary high voltage changes instantaneously. According to the standard, the difference between the instantaneous values of the primary and secondary voltages within 20 ms should be less than 10% to ensure that the secondary voltage reflects the change of the primary voltage in a short time. Thus, once an overvoltage occurs in the primary or a ground short circuit occurs, the voltage transformer can transmit correct signals to the protection system in time, ensuring the accuracy and timeliness of the protection system operation. The accuracy of transmitting and transforming voltage signals directly affects the measurement results of instruments and the accuracy of the protection device operation. Therefore, this test is very important.

[0004] According to the requirements of IEC61869-5 and GB20840-5 standards, during the transient response test of the capacitive voltage transformer, the primary high voltage should be short-circuited for more than 100 ms at 80% to 150% of the rated voltage, and the primary voltage of the sine wave should be grounded and short-circuited at 0° and 90°. The voltage waveform is measured at the secondary side. The ratio of the sum of the instantaneous values of the secondary voltage within 20 ms to the voltage value before the short circuit should be less than 10%. The conventional method is to randomly perform a high-voltage ground short circuit by operating the high-voltage switch with a button. After multiple tests, a test method that meets the requirements is selected. Usually, hundreds of break tests may be required to screen out the waveform we need, which is time-consuming and laborious, and causes great damage to the test transformer.

[0005] Currently, in view of the problems in the related technology, such as a large number of test times, long test time, damage to the transformer, large floor area and high cost of the third-party independent laboratory scheme equipment, no effective solution has been proposed. Content of the Utility Model

[0006] The purpose of this application is to provide a transient response test phase-selection closing short-circuit control device and system for the deficiencies in the prior art, so as to at least solve problems such as a large number of tests, long test time, damage to transformers, large floor area and high cost of equipment in the third-party independent laboratory solution in related technologies.

[0007] To achieve the above object, the technical solution adopted in this application is as follows:

[0008] In the first aspect, the present utility model provides a transient response test phase-selection closing short-circuit control device for transformer tests, including:

[0009] A synchronization unit, which is connected to the secondary winding of the transformer under test and is used for performing a primary high-voltage measurement on the secondary winding of the transformer under test;

[0010] A breaking unit, which is connected to the synchronization unit. One end of the main circuit of the breaking unit is connected to the transformer, and the other end of the main circuit of the breaking unit is grounded. The breaking unit is connected in parallel with the transformer under test;

[0011] An oscilloscope unit, which is connected to the synchronization unit and is used for measuring the primary high-voltage, secondary voltage waveforms and amplitudes, as well as displaying the closing and opening angles and the delay time of the breaking unit.

[0012] In some of these embodiments, the synchronization unit includes:

[0013] A control module, which is connected to the oscilloscope unit and is used for signal transmission;

[0014] A measurement module, which is respectively connected to the control module and the secondary winding of the transformer under test and is used for primary high-voltage measurement;

[0015] A timing module, which is connected to the control module and is used for obtaining the instructions transmitted by the control module;

[0016] An output module, which is respectively connected to the timing module and the breaking unit and is used for controlling the breaking unit according to the instructions transmitted by the timing module;

[0017] A power supply module, which is connected to the control module and the output module and is used for power supply.

[0018] In some of these embodiments, the timing module includes:

[0019] A first timing element, which is connected to the control module and is used for obtaining the instructions transmitted by the control module;

[0020] A second timing element, which is respectively connected to the first timing element and the output module, and is configured to obtain the instruction transmitted by the first timing element and transmit it to the output module.

[0021] In some embodiments, the timing module further includes:

[0022] A third timing element, which is respectively connected to the first timing element or the second timing element and the output module, and is configured to obtain the instruction transmitted by the first timing element or the second timing element and transmit it to the output module.

[0023] In some embodiments, the output module includes:

[0024] A first output element, which is respectively connected to the timing module, the power supply module, and the circuit breaker unit, and is configured to control the circuit breaker unit according to the instruction transmitted by the timing module.

[0025] In some embodiments, the output module further includes:

[0026] A second output element, which is respectively connected to the timing module, the power supply module, and the circuit breaker unit, and is configured to control the circuit breaker unit according to the instruction transmitted by the timing module.

[0027] In some embodiments, the power supply module includes:

[0028] A first power supply element, which is connected to the control module and is configured to supply power to the control module;

[0029] A second power supply element, which is connected to the output module and is configured to supply power to the output module.

[0030] In some embodiments, the synchronization unit includes:

[0031] A central control module, which is disposed in the control room and is respectively connected to the oscilloscope unit and the secondary winding of the to-be-tested mutual inductor, and is configured for signal transmission;

[0032] A signal module, which is disposed in the test room, is communicatively connected to the central control module, and is connected to the circuit breaker unit, and is configured to obtain the instruction transmitted by the central control module and control the circuit breaker unit.

[0033] In some embodiments, the central control module includes:

[0034] A central control element, which is connected to the oscilloscope unit and is configured for signal transmission;

[0035] Measuring elements, which are respectively connected to the central control element and the secondary winding of the to-be-tested mutual inductor for primary high-voltage measurement;

[0036] A fourth timing element, which is respectively connected to the central control element and the signal module, for obtaining the instructions transmitted by the central control element and transmitting them to the signal module;

[0037] A third power supply element, which is connected to the central control element for power supply.

[0038] In some of the embodiments, the signal module includes:

[0039] A fifth timing element, which is connected to the central control module for obtaining the instructions transmitted by the central control module;

[0040] A third output element, which is respectively connected to the fifth timing element and the breaking unit, for obtaining the instructions transmitted by the fourth timing element and transmitting them to the breaking unit;

[0041] A fourth power supply element, which is connected to the third output element for power supply.

[0042] In some of the embodiments, the signal module further includes:

[0043] A sixth timing element, which is connected to the fifth timing element or the central control module for obtaining the instructions transmitted by the fifth timing element or the central control module;

[0044] A fourth output element, which is respectively connected to the sixth timing element, the fourth power supply element, and the breaking unit, for obtaining the instructions transmitted by the fifth timing element and transmitting them to the breaking unit.

[0045] In some of the embodiments, it further includes:

[0046] A resistance unit, which is arranged in parallel between the breaking unit and the transformer for protecting the transformer.

[0047] In some of the embodiments, it further includes:

[0048] A control unit, which is respectively connected to the synchronization unit and the oscilloscope unit for data interaction with the synchronization unit and the oscilloscope unit respectively.

[0049] In a second aspect, the present utility model provides a transient response test phase-selection closing short-circuit control system, including:

[0050] The transient response test phase-selection closing short-circuit control device as described in the first aspect is connected to the secondary winding of the to-be-tested mutual inductor;

[0051] A voltage transformation device, which is connected to the breaking unit of the transient response test phase-selection closing short-circuit control device.

[0052] In some of these embodiments, it further includes:

[0053] A voltage dividing device, which is connected to the synchronization unit of the transient response test phase-selection closing short-circuit control device.

[0054] Compared with the related technology, the transient response test phase-selection closing short-circuit control device and system provided by the embodiments of the present application, during the transient response test of the high-voltage capacitive voltage mutual inductor, according to the requirements of IEC61869-5 and GB20840-5 standards, are used to select the phase to close and disconnect the short circuit between the high-voltage main circuit and the ground. The closing accuracy can reach within 1°, the resolution can reach 0.2°, and two or more high-voltage switches can be controlled to act cooperatively at the same time, which can avoid a high-voltage switch malfunctioning and causing the high-voltage power supply to be grounded for a long time and damaging the step-up transformer; the investment cost is small, and the precise angle disconnection can save a large amount of test time, and because the number of high-voltage to-ground short circuits is reduced, the damage to the test transformer during the test process is reduced. Description of the Drawings

[0055] The drawings described herein are used to provide a further understanding of the present application and constitute a part of the present application. The schematic embodiments of the present application and their descriptions are used to explain the present application and do not constitute an improper limitation to the present application. In the drawings:

[0056] Figure 1 is a circuit schematic diagram of the transient response test phase-selection closing short-circuit control device according to the embodiment of the present utility model;

[0057] Figure 2 is a framework diagram of the transient response test phase-selection closing short-circuit control device according to the embodiment of the present utility model;

[0058] Figure 3 is a framework diagram (one) of the synchronization unit according to the embodiment of the present utility model;

[0059] Figure 4 is a framework diagram of the timing module, output module, and power supply module according to the embodiment of the present utility model;

[0060] Figure 5 is a framework diagram (two) of the synchronization unit according to the embodiment of the present utility model;

[0061] Figure 6It is a framework diagram of a central control module and a signal module according to an embodiment of the present utility model;

[0062] Figure 7 It is a circuit schematic diagram of a transient response test phase - selection closing short - circuit control system according to an embodiment of the present utility model;

[0063] Figure 8 It is a test principle diagram of a specific implementation manner of a transient response test phase - selection closing short - circuit control device according to an embodiment of the present utility model;

[0064] Figure 9 It is a brief schematic diagram of an FTB - 300 fiber optic synchronizer according to an embodiment of the present utility model.

[0065] The reference numerals therein are: 100, synchronization unit; 110, control module; 120, measurement module; 130, timing module; 131, first timing element; 132, second timing element; 133, third timing element; 140, output module; 141, first output element; 142, second output element; 150, power supply module; 151, first power supply element; 152, second power supply element; 160, central control module; 161, central control element; 162, measurement element; 163, fourth timing element; 164, third power supply element; 170, signal module; 171, fifth timing element, 172, third output element; 173, fourth power supply element; 174, sixth timing element; 175, fourth output element;

[0066] 200, breaking unit; 300, oscilloscope unit; 400, resistance unit; 500, control unit;

[0067] A, transient response test phase - selection closing short - circuit control device; B, voltage transformation device; C, voltage division device; D, secondary winding of the measured mutual inductor. Specific implementation manner

[0068] In order to make the purpose, technical solutions and advantages of this application clearer, the following describes and explains this application in combination with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain this application and are not used to limit this application. Based on the embodiments provided by this application, all other embodiments obtained by those of ordinary skill in the art without creative efforts belong to the scope of protection of this application.

[0069] Obviously, the accompanying drawings in the following description are only some examples or embodiments of the present application. For those of ordinary skill in the art, without creative efforts, the present application can also be applied to other similar scenarios based on these drawings. In addition, it can also be understood that although the efforts made in such a development process may be complex and lengthy, for those of ordinary skill in the art related to the content disclosed in the present application, some design, manufacturing or production changes made based on the technical content disclosed in the present application are only conventional technical means and should not be understood as insufficient disclosure of the content of the present application.

[0070] The mention of "embodiment" in the present application means that the specific features, structures or characteristics described in combination with the embodiment can be included in at least one embodiment of the present application. The appearance of this phrase at various positions in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment mutually exclusive with other embodiments. Those of ordinary skill in the art explicitly and implicitly understand that the embodiments described in the present application can be combined with other embodiments without conflict.

[0071] Unless otherwise defined, the technical terms or scientific terms involved in the present application shall have the ordinary meaning understood by those with ordinary skills in the technical field to which the present application belongs. The words such as "a", "an", "one kind", "the" and the like involved in the present application do not represent a quantity limitation and can represent a singular or plural number. The terms "comprising", "including", "having" and any variations thereof involved in the present application are intended to cover non-exclusive inclusion; for example, a process, method, system, product or device including a series of steps or modules (units) is not limited to the listed steps or units, but may further include unlisted steps or units, or may further include other steps or units inherent to these processes, methods, products or devices. The terms "connected", "coupled" and the like involved in the present application are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. The "plurality" involved in the present application refers to two or more. "And / or" describes the association relationship of associated objects and indicates that three relationships may exist. For example, "A and / or B" may represent: A exists alone, A and B exist simultaneously, and B exists alone. The character " / " generally represents an "or" relationship between the front and rear associated objects. The terms "first", "second", "third" and the like involved in the present application are only used to distinguish similar objects and do not represent a specific order for the objects.

[0072] Embodiment 1

[0073] This embodiment relates to a transient response test phase selection closing short-circuit control device of the present utility model.

[0074] A schematic embodiment of the present utility model is as follows Figures 1 - 2 As shown, a transient response test phase selection closing short - circuit control device for transformer testing includes a synchronization unit 100, a circuit - breaking unit 200, and an oscilloscope unit 300. Among them, the synchronization unit 100 is connected to the secondary winding of the transformer under test, and is used to perform a primary high - voltage measurement on the secondary winding of the transformer under test; the circuit - breaking unit 200 is connected to the synchronization unit 100. One end of the main circuit of the circuit - breaking unit 200 is connected to the transformer, and the other end of the main circuit of the circuit - breaking unit 200 is grounded. The circuit - breaking unit 200 is connected in parallel with the transformer under test; the oscilloscope unit 300 is connected to the synchronization unit 100, and is used to measure the primary high - voltage, secondary voltage waveforms and amplitudes, and display the closing and opening angles and the delay time of the circuit - breaking unit 200.

[0075] In the present utility model, the transformer is a capacitive voltage transformer.

[0076] In the present utility model, the synchronization unit 100 includes but is not limited to the FTB - 300 fiber - optic synchronizer.

[0077] In the present utility model, the circuit - breaking unit 200 is a vacuum circuit breaker, including but not limited to the VDG handcart - type 12kV vacuum high - voltage circuit breaker.

[0078] In the present utility model, the oscilloscope unit 300 includes but is not limited to an oscilloscope.

[0079] Further, the transient response test phase selection closing short - circuit control device further includes a resistor unit 400. Among them, the resistor unit 400 is connected in parallel between the circuit - breaking unit 200 and the transformer, and is used to protect the transformer.

[0080] In the present utility model, the resistance value of the resistor unit 400 is 3kΩ - 6kΩ, and is used to protect the step - up transformer when the main circuit is grounded and short - circuited.

[0081] Further, the transient response test phase selection closing short - circuit control device further includes a control unit 500. Among them, the control unit 500 is respectively connected to the synchronization unit 100 and the oscilloscope unit 300, and is used to perform data interaction with the synchronization unit 100 and the oscilloscope unit 300 respectively.

[0082] In the present utility model, the control unit 500 includes but is not limited to a host computer.

[0083] As Figure 3As shown, the synchronization unit 100 includes a control module 110, a measurement module 120, a timing module 130, an output module 140, and a power supply module 150. Among them, the control module 110 is connected to the oscilloscope unit 300 for signal transmission; the measurement module 120 is respectively connected to the control module 110 and the secondary winding of the transformer under test for primary high-voltage measurement; the timing module 130 is connected to the control module 110 for obtaining the instructions transmitted by the control module 110; the output module 140 is respectively connected to the timing module 130 and the circuit breaker unit 200 for controlling the circuit breaker unit 200 according to the instructions transmitted by the timing module 130; the power supply module 150 is connected to the control module 110 and the output module 140 for power supply.

[0084] In the present utility model, the control module 110 includes, but is not limited to, a circuit board, a single-chip microcomputer, a chip, a CPU, etc.

[0085] In the present utility model, the measurement module 120 includes, but is not limited to, measurement terminals.

[0086] As Figure 4 shown, the timing module 130 includes a first timing element 131 and a second timing element 132. Among them, the first timing element 131 is connected to the control module 110 for obtaining the instructions transmitted by the control module 110; the second timing element 132 is respectively connected to the first timing element 131 and the output module 140 for obtaining the instructions transmitted by the first timing element 131 and transmitting them to the output module 140.

[0087] The first timing element 131 is electrically connected to the control module 110, including but not limited to fiber optic connection.

[0088] In the present utility model, the first timing element 131 includes, but is not limited to, a timing control module. For example, the first timing element 131 includes a plurality of first timing connection terminals. Among them, the plurality of first timing connection terminals are respectively electrically connected to the second timing element 132.

[0089] The connection between the second timing element 132 and the first timing element 131 is an electrical connection, including but not limited to fiber optic connection.

[0090] In the present utility model, the second timing element 132 includes, but is not limited to, a timing control module. For example, the second timing element 132 includes a plurality of second timing connection terminals. Among them, the plurality of second timing connection terminals are respectively electrically connected to the first timing element 131.

[0091] Further, the timing module 130 further includes a third timing element 133. The third timing element 133 is respectively connected to the first timing element 131 or the second timing element 132 and the output module 140, and is configured to obtain an instruction transmitted by the first timing element 131 or the second timing element 132 and transmit it to the output module 140.

[0092] The connection between the third timing element 133 and the first timing element 131 is an electrical connection, including but not limited to a fiber optic connection.

[0093] The connection between the third timing element 133 and the second timing element 132 is an electrical connection, including but not limited to a fiber optic connection.

[0094] Generally, one of the third timing element 133 and the second timing element 132 is electrically connected to the first timing element 131.

[0095] In the present utility model, the third timing element 133 includes but is not limited to a timing control module. For example, the third timing element 133 includes a plurality of third timing connection terminals. Among them, the plurality of third timing connection terminals are respectively electrically connected to the first timing element 131.

[0096] In one of the embodiments, there are 8 first timing connection terminals, 4 second timing connection terminals, and 4 third timing connection terminals. Among them, 4 first timing connection terminals are respectively connected to 4 second timing connection terminals in a one-to-one correspondence, and the remaining 4 first timing connection terminals are respectively connected to 4 third timing connection terminals in a one-to-one correspondence.

[0097] As Figure 4 shown, the output module 140 includes a first output element 141. The first output element 141 is respectively connected to the timing module 130, the power supply module 150, and the open circuit unit 200, and is configured to control the open circuit unit 200 according to an instruction transmitted by the timing module 130.

[0098] Specifically, the first output element 141 is connected to the second timing element 132.

[0099] The first output element 141 and the second timing element 132 are electrically connected, including but not limited to a fiber optic connection.

[0100] In the present utility model, the first output element 141 includes but is not limited to an output module. For example, the first output element 141 includes a plurality of first output connection terminals. Among them, the plurality of first output connection terminals are respectively electrically connected to the open circuit unit 200.

[0101] Furthermore, the output module 140 further includes a second output component 142. The second output component 142 is respectively connected to the timing module 130, the power supply module 150, and the disconnection unit 200, and is used to control the disconnection unit 200 according to the instructions transmitted by the timing module 130.

[0102] Specifically, the second output component 142 is connected to the third timing component 133.

[0103] The second output component 142 and the third timing component 133 are electrically connected, including but not limited to fiber optic connection.

[0104] In the present utility model, the second output component 142 includes but not limited to an output module. For example, the second output component 142 includes a plurality of second output connection terminals. Among them, the plurality of second output connection terminals are respectively electrically connected to the disconnection unit 200.

[0105] As Figure 4 shown, the power supply module 150 includes a first power supply component 151 and a second power supply component 152. Among them, the first power supply component 151 is connected to the control module 110 and is used to supply power to the control module 110; the second power supply component 152 is connected to the output module 140 and is used to supply power to the output module 140.

[0106] Specifically, the second power supply component 152 is respectively connected to the first output component 141 and the second output component 142.

[0107] The first power supply component 151 is electrically connected to the control module 110.

[0108] The first power supply component 151 is connected to an external power supply and is used to supply power to the control module 110.

[0109] In some of the embodiments, the first power supply component 151 includes but not limited to a power supply module, such as the DC-S-150-12 type and the AC-S-150-220 type.

[0110] The second power supply component 152 is respectively electrically connected to the first output component 141 and the second output component 142.

[0111] The second power supply component 152 is connected to an external power supply and is used to supply power to the first output component 141 and the second output component 142.

[0112] In some of the embodiments, the second power supply component 152 includes but not limited to a power supply module, such as the DC-S-150-12 type and the AC-S-150-220 type.

[0113] The technical effects of the present utility model are as follows:

[0114] During the transient response test of a high-voltage capacitive voltage transformer, according to the requirements of IEC61869-5 and GB20840-5 standards, it is used to short-circuit the high-voltage main circuit and the ground during phase selection for closing and opening. The closing accuracy can reach within 1°, the resolution can reach 0.2°, and it can control the coordinated operation of two or more high-voltage switches simultaneously. It can avoid the damage of the step-up transformer caused by the misoperation of a high-voltage switch resulting in the long-term grounding of the high-voltage power supply. The investment cost is small, and it can accurately open the circuit at a certain angle, saving a large amount of test time. Moreover, due to reducing the number of high-voltage-to-ground short circuits, it reduces the damage to the test transformer during the test process.

[0115] Embodiment 2

[0116] This embodiment relates to a phase selection closing short-circuit control device for the transient response test of the present utility model.

[0117] A schematic embodiment of the present utility model is as Figures 1 - 2 shown. A phase selection closing short-circuit control device for the transient response test, used for the transformer test, includes a synchronization unit 100, a breaking unit 200, and an oscilloscope unit 300. Among them, the synchronization unit 100 is connected to the secondary winding of the transformer to be measured, and is used to perform a primary high-voltage measurement on the secondary winding of the transformer to be measured; the breaking unit 200 is connected to the synchronization unit 100. One end of the main circuit of the breaking unit 200 is connected to the transformer, and the other end of the main circuit of the breaking unit 200 is grounded. The breaking unit 200 is connected in parallel with the transformer to be measured; the oscilloscope unit 300 is connected to the synchronization unit 100, and is used to measure the primary high-voltage, secondary voltage waveforms and amplitudes, as well as display the closing and opening angles and the delay time of the breaking unit 200.

[0118] In the present utility model, the synchronization unit 100 includes, but is not limited to, an FTB-300 fiber optic synchronizer.

[0119] In the present utility model, the breaking unit 200 is a vacuum circuit breaker, including, but is not limited to, a VDG handcart type 12kV vacuum high-voltage circuit breaker.

[0120] In the present utility model, the oscilloscope unit 300 includes, but is not limited to, an oscilloscope.

[0121] Furthermore, the phase selection closing short-circuit control device for the transient response test further includes a resistance unit 400. Among them, the resistance unit 400 is connected in parallel between the breaking unit 200 and the transformer, and is used to protect the transformer.

[0122] In the present utility model, the resistance value of the resistance unit 400 is 3kΩ - 6kΩ, and it is used to protect the step-up transformer when the main circuit is grounded and short-circuited.

[0123] Furthermore, the transient response test phase-selection closing short-circuit control device further includes a control unit 500. The control unit 500 is respectively connected to the synchronization unit 100 and the oscilloscope unit 300, and is used for data interaction with the synchronization unit 100 and the oscilloscope unit 300 respectively.

[0124] In the present utility model, the control unit 500 includes, but is not limited to, a host computer.

[0125] As Figure 5 shown, the synchronization unit 100 includes a central control module 160 and a signal module 170. The central control module 160 is arranged in the control room and is respectively connected to the oscilloscope unit 300 and the secondary winding of the to-be-tested mutual inductor for signal transmission; the signal module 170 is arranged in the test room, is communicatively connected to the central control module 160, and is connected to the disconnection unit 200 for obtaining the instruction transmitted by the central control module 160 and controlling the disconnection unit 200.

[0126] As Figure 6 shown, the central control module 160 includes a central control component 161, a measurement component 162, a fourth timing component 163, and a third power supply component 164. The central control component 161 is connected to the oscilloscope unit 300 for signal transmission; the measurement component 162 is respectively connected to the central control component 161 and the secondary winding of the to-be-tested mutual inductor for primary high-voltage measurement; the fourth timing component 163 is respectively connected to the central control component 161 and the signal module 170 for obtaining the instruction transmitted by the central control component 161 and transmitting it to the signal module 170; the third power supply component 164 is connected to the central control component 161 for power supply.

[0127] In the present utility model, the central control component 161 includes, but is not limited to, a circuit board, a single-chip microcomputer, a chip, a CPU, etc.

[0128] In the present utility model, the measurement component 162 includes, but is not limited to, measurement terminals.

[0129] The fourth timing component 163 is electrically connected to the central control component 161, including, but is not limited to, optical fiber connection.

[0130] In the present utility model, the fourth timing component 163 includes, but is not limited to, a timing control module. For example, the fourth timing component 163 includes a plurality of fourth timing connection terminals. Among them, the plurality of fourth timing connection terminals are respectively electrically connected to the signal module 170.

[0131] The third power supply component 164 is electrically connected to the central control component 161.

[0132] The third power supply component 164 is connected to an external power supply for supplying power to the central control component 161.

[0133] In some of these embodiments, the third power supply element 164 includes, but is not limited to, a power supply module, such as the DC-S-150-12 type and the AC-S-150-220 type.

[0134] As Figure 6 As shown, the signal module 170 includes a fifth timing element 171, a third output element 172, and a fourth power supply element 173. Among them, the fifth timing element 171 is connected to the central control module 160 and is used to obtain the instructions transmitted by the central control module 160; the third output element 172 is respectively connected to the fifth timing element 171 and the breaking unit 200, and is used to obtain the instructions transmitted by the fourth timing element 163 and transmit them to the breaking unit 200; the fourth power supply element 173 is connected to the third output element 172 and is used for power supply.

[0135] Specifically, the fifth timing element 171 is connected to the fourth timing element 163.

[0136] The connection between the fifth timing element 171 and the fourth timing element 163 is an electrical connection, including but not limited to a fiber optic connection.

[0137] In the present utility model, the fifth timing element 171 includes, but is not limited to, a timing control module. For example, the fifth timing element 171 includes a number of fifth timing connection terminals. Among them, the number of fifth timing connection terminals are respectively electrically connected to the fourth timing element 163.

[0138] The third output element 172 is electrically connected to the fifth timing element 171, including but not limited to a fiber optic connection.

[0139] In the present utility model, the third output element 172 includes, but is not limited to, an output module. For example, the third output element 172 includes a number of third output connection terminals. Among them, the number of third output connection terminals are respectively electrically connected to the breaking unit 200.

[0140] The fourth power supply element 173 is electrically connected to the third output element 172.

[0141] The fourth power supply element 173 is connected to an external power supply and is used to supply power to the third output element 172.

[0142] In some of these embodiments, the fourth power supply element 173 includes, but is not limited to, a power supply module, such as the DC-S-150-12 type and the AC-S-150-220 type.

[0143] Further, the signal module 170 further includes a sixth timing element 174 and a fourth output element 175. Among them, the sixth timing element 174 is connected to the fifth timing element 171 or the central control module 160, and is used to obtain the instructions transmitted by the fifth timing element 171 or the central control module 160; the fourth output element 175 is respectively connected to the sixth timing element 174, the fourth power supply element 173, and the open circuit unit 200, and is used to obtain the instructions transmitted by the fifth timing element 171 and transmit them to the open circuit unit 200.

[0144] Specifically, the sixth timing element 174 is connected to the fourth timing element 163.

[0145] The connection between the sixth timing element 174 and the fourth timing element 163 is an electrical connection, including but not limited to fiber optic connection.

[0146] In the present utility model, the sixth timing element 174 includes but not limited to a timing control module. For example, the sixth timing element 174 includes a plurality of sixth timing connection terminals. Among them, the plurality of sixth timing connection terminals are respectively electrically connected to the fourth timing element 163.

[0147] In one of the embodiments, there are 8 fourth timing connection terminals, 4 fifth timing connection terminals, and 4 sixth timing connection terminals. Among them, 4 fourth timing connection terminals are respectively connected to 4 fifth timing connection terminals in one-to-one correspondence, and the remaining 4 fourth timing connection terminals are respectively connected to 4 sixth timing connection terminals in one-to-one correspondence.

[0148] The fourth output element 175 is electrically connected to the sixth timing element 174, including but not limited to fiber optic connection.

[0149] In the present utility model, the fourth output element 175 includes but not limited to an output module. For example, the fourth output element 175 includes a plurality of fourth output connection terminals. Among them, the plurality of fourth output connection terminals are respectively electrically connected to the open circuit unit 200.

[0150] The technical effects of the present utility model are as follows:

[0151] During the transient response test of the high-voltage capacitive voltage transformer, according to the requirements of IEC61869-5 and GB20840-5 standards, it is used to select the phase for closing and opening to short-circuit between the high-voltage main circuit and the ground. The closing accuracy can reach within 1°, the resolution can reach 0.2°, and it can simultaneously control two or more high-voltage switches to act in coordination, which can avoid the damage of the step-up transformer caused by the misoperation of a high-voltage switch resulting in the long-term grounding of the high-voltage power supply; the investment cost is small, and the opening is accurately angled, saving a large amount of test time. And because the number of high-voltage-to-ground short circuits is reduced, the damage to the test transformer during the test process is reduced.

[0152] Embodiment 3

[0153] This embodiment relates to the transient response test phase-selection closing short-circuit control system of the present utility model.

[0154] A schematic embodiment of the present utility model, as Figure 7 shown, a transient response test phase-selection closing short-circuit control system includes the transient response test phase-selection closing short-circuit control device A and the voltage transformation device B as described in Embodiment 1 or Embodiment 2. Among them, the transient response test phase-selection closing short-circuit control device A is connected to the secondary winding D of the to-be-tested mutual inductor; the voltage transformation device B is connected to the breaking unit 200 of the transient response test phase-selection closing short-circuit control device A.

[0155] Furthermore, the transient response test phase-selection closing short-circuit control system further includes a voltage dividing device C. Among them, the voltage dividing device C is connected to the synchronization unit 100 of the transient response test phase-selection closing short-circuit control device A.

[0156] In the present utility model, the voltage dividing device C includes but is not limited to a voltage divider and a secondary winding of a standard voltage mutual inductor.

[0157] The usage method of this embodiment is basically the same as that of Embodiments 1 to 2, and will not be elaborated here.

[0158] The technical effect of this embodiment is basically the same as that of Embodiments 1 to 2, and will not be elaborated here.

[0159] Embodiment 4

[0160] This embodiment is a specific implementation manner of the present utility model.

[0161] As Figure 8 shown, a capacitive voltage mutual inductor transient response test phase-selection closing short-circuit control device includes an FTB-300 fiber optic synchronizer, a vacuum circuit breaker, a host computer, and an oscilloscope.

[0162] Among them, the FTB-300 fiber optic synchronizer includes a CPU part and a Control part. Among them, the CPU part includes a CPU module, a test module, a first timing module, and a first power supply module, and the Control part includes a second timing module, a third timing module, a first output module, a second output module, and a second power supply module.

[0163] The CPU module is communicatively connected to the host computer and the oscilloscope through device connectors (such as RS232 interface, signal reading interface, signal writing interface, signal ground interface) (e.g., receiving the closing angle and delay of the 8-channel control switch, calculating the closing and opening times); the test module is electrically connected to the CPU module and is connected to the secondary winding of the voltage transformer under test and the voltage divider (or the secondary winding of the standard voltage transformer) through connectors (such as the primary voltage angle detection terminal) for performing primary high-voltage measurement; the first timing module is connected to the CPU module and the second / third timing module of Control through optical fibers for signal transmission (e.g., transmitting the closing and opening times); the first power supply module is connected to the CPU module for supplying power to the CPU part.

[0164] The second timing module is connected to the first timing module through an optical fiber for obtaining signals (e.g., obtaining the closing and opening times); the third timing module is connected to the first timing module through an optical fiber for obtaining signals (e.g., obtaining the closing and opening times); the first output module is electrically connected to the second timing module for controlling the switch of the vacuum circuit breaker according to the signal; the second output module is electrically connected to the third timing module for controlling the switch of the vacuum circuit breaker according to the signal; the second power supply module is connected to the first output module and the second output module respectively for supplying power to the Control part.

[0165] In some of the embodiments, the CPU part is arranged in the control room and the Control part is arranged at a remote location (i.e., the test room, the laboratory).

[0166] In some of the embodiments, the vacuum circuit breaker is a VDG handcart type 12kV vacuum high-voltage circuit breaker.

[0167] The vacuum circuit breaker includes a mechanical energy storage type switch operating mechanism, three-phase arc extinguishing chambers and insulating supports. The power supply of the vacuum circuit breaker is a 220V DC power supply, which can ensure that the action delay of the closing and opening processes is not affected by the AC phase. One end of the main circuit of the vacuum circuit breaker is connected to the output of the test transformer and is in parallel with the voltage transformer under test, and the other end of the main circuit of the vacuum circuit breaker is grounded. That is, when the vacuum circuit breaker closes, the primary high voltage is directly grounded.

[0168] Further, a protection resistor is directly connected in parallel between the vacuum circuit breaker and the test transformer. After the vacuum circuit breaker operates, the short-circuit current of the test transformer to the ground is reduced, thereby protecting the test transformer.

[0169] The host computer exchanges data with the FTB-300 fiber optic synchronizer. The specific working mode is as follows: First, a closing angle is preset. According to the actual closing angle displayed on the oscilloscope, the fixed mechanical delay between the signal received by the vacuum circuit breaker and closing can be calculated, and this delay is recorded. Then, the data is adjusted to achieve the function of phase-selective closing and opening with precise control of the closing and opening angles of the high-voltage switch.

[0170] In the host computer, there is a RS232 serial port control host computer software program compiled by Delphi 7.0, which is only used for setting parameters and recording data.

[0171] The oscilloscope is used to measure the primary high voltage and secondary voltage waveforms and amplitudes. The specific closing and opening angles and the specific delay time of the vacuum circuit breaker can be calculated through the voltage waveforms.

[0172] The investment cost of the utility model is small, and it has precise angle opening and closing, saving a large amount of test time. Moreover, since the number of high-voltage ground short circuits is reduced, the damage to the test transformer during the test process is reduced. [[ID=ll]]

[0173] The above embodiments only represent several implementation manners of the present application. The description is relatively specific and detailed, but it cannot be understood as a limitation on the scope of the utility model patent. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present application, several modifications and improvements can still be made, and these all belong to the protection scope of the present application. Therefore, the protection scope of the patent of the present application should be subject to the appended claims.

Claims

1. A transient response test phase selection closing short-circuit control device for transformer testing, characterized in that: include: a synchronization unit connected to the secondary winding of the transformer to be measured and used to perform a primary high-voltage measurement on the secondary winding of the transformer to be measured; a circuit breaker unit, the circuit breaker unit being connected to the synchronization unit, one end of a main circuit of the circuit breaker unit being connected to a transformer, the other end of the main circuit of the circuit breaker unit being grounded, and the circuit breaker unit being connected in parallel with the transformer to be tested; An oscilloscope unit is connected to the synchronization unit and is used to measure the primary high voltage, secondary voltage waveform and amplitude, and to display the closing and opening angles and the delay time of the circuit breaker unit.

2. The transient response test phase selection closing short-circuit control device according to claim 1 is characterized in that: The synchronization unit comprises: A control module connected to the oscilloscope unit for signal transmission; A measuring module, the measuring module is respectively connected to the control module and the secondary winding of the transformer to be measured, and is used for primary high voltage measurement; A timing module, connected to the control module, for acquiring instructions transmitted by the control module; an output module, the output module being connected to the timing module and the disconnecting unit respectively, and being configured to control the disconnecting unit according to instructions transmitted by the timing module; A power supply module is connected to the control module and the output module for supplying power.

3. The transient response test phase selection closing short-circuit control device according to claim 2, characterized in that: The timing module includes: a first sequential element, connected to the control module and configured to obtain instructions transmitted by the control module; a second sequential element, the second sequential element being connected to the first sequential element and the output module respectively, and being configured to obtain instructions transmitted by the first sequential element and transmit the instructions to the output module; and / or The output module includes: a first output element, the first output element being connected to the timing module, the power module, and the disconnecting unit, respectively, and being configured to control the disconnecting unit according to an instruction transmitted by the timing module; and / or The power module includes: a first power supply element, connected to the control module and configured to supply power to the control module; A second power supply element is connected to the output module and is used to supply power to the output module.

4. The transient response test phase selection closing short-circuit control device according to claim 3 is characterized in that: The timing module also includes: A third sequential element, the third sequential element being connected to the first sequential element or the second sequential element and the output module respectively, and being configured to obtain instructions transmitted by the first sequential element or the second sequential element and transmit the instructions to the output module; and / or The output module also includes: A second output element is connected to the timing module, the power module, and the disconnecting unit respectively, and is used to control the disconnecting unit according to the instruction transmitted by the timing module.

5. The transient response test phase selection closing short-circuit control device according to claim 1, characterized in that: The synchronization unit comprises: A central control module is provided in the control room and is respectively connected to the oscilloscope unit and the secondary winding of the transformer to be tested for signal transmission; A signal module is provided in the test room and is in communication with the central control module and connected to the circuit breaker unit, and is used to obtain instructions transmitted by the central control module and control the circuit breaker unit.

6. The transient response test phase selection closing short-circuit control device according to claim 5, characterized in that: The central control module includes: a central control element, connected to the oscilloscope unit for signal transmission; A measuring element, which is respectively connected to the central control element and the secondary winding of the transformer to be measured, and is used for primary high voltage measurement; a fourth sequential element, connected to the central control element and the signal module respectively, and configured to obtain instructions transmitted by the central control element and transmit the instructions to the signal module; A third power supply element, connected to the central control element for supplying power; and / or The signal module includes: a fifth sequential element, connected to the central control module and configured to obtain instructions transmitted by the central control module; a third output element, the third output element being connected to the fifth sequential element and the disconnecting unit respectively, and being configured to obtain the instruction transmitted by the fourth sequential element and transmit the instruction to the disconnecting unit; A fourth power supply element is connected to the third output element and is used for supplying power.

7. The transient response test phase selection closing short-circuit control device according to claim 6, characterized in that: The signal module further includes: a sixth sequential element, connected to the fifth sequential element or the central control module, and configured to obtain instructions transmitted by the fifth sequential element or the central control module; A fourth output element is connected to the sixth sequential element, the fourth power supply element, and the disconnecting unit respectively, and is used to obtain the instruction transmitted by the fifth sequential element and transmit it to the disconnecting unit.

8. The transient response test phase selection closing short-circuit control device according to any one of claims 1 to 7, characterized in that: Also includes: a resistance unit, the resistance unit being arranged in parallel between the circuit breaker unit and the transformer for protecting the transformer; and / or A control unit is connected to the synchronization unit and the oscilloscope unit respectively, and is used to exchange data with the synchronization unit and the oscilloscope unit respectively.

9. A transient response test phase selection closing short circuit control system, characterized in that: include: The transient response test phase selection closing short-circuit control device according to any one of claims 1 to 8, wherein the transient response test phase selection closing short-circuit control device is connected to the secondary winding of the transformer to be tested; A transformer device is connected to the circuit breaker unit of the transient response test phase selection closing short-circuit control device.

10. The transient response test phase selection closing short-circuit control system according to claim 9, characterized in that: Also includes: A voltage dividing device is connected to the synchronization unit of the transient response test phase selection closing short-circuit control device.

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