Generator withstand voltage test system

Abstract

The utility model relates to a generator withstand voltage test system, which comprises an electric console unit, and an electric voltage regulator unit, an excitation transformer unit, an adjustable reactor unit and a capacitive voltage divider unit which are connected with the electric console unit, the input side of the electric voltage regulator unit is connected with a power supply; the primary side of the excitation transformer unit is connected with the output side of the electric voltage regulator; the low-voltage side of the adjustable reactor unit is connected with the high-voltage head end of the secondary side of the excitation transformer unit, and the high-voltage side of the adjustable reactor unit is connected with the capacitive voltage divider unit and the tested generator; and the capacitive voltage divider unit is connected in parallel with the tested generator. An adjustable reactor series connection mode is adopted, and the inductance value of the reactor is smoothly and infinitely adjusted according to the capacitance of the tested generator, so that the tested generator resonates and generates high voltage under the power frequency of 50Hz, and the power supply capacity and the size and weight of test equipment are reduced.

Description

Technical Field

[0001] This application relates to the field of generator testing technology, and in particular to generator withstand voltage test systems. Background Technology

[0002] As power supply equipment in the power system, generators play a vital role in the safe and stable operation of people's lives and social production. AC withstand voltage testing, as an important item for assessing the insulation strength of electrical equipment, is mandatory during the manufacturing, installation, and maintenance processes of electrical equipment. Because power frequency high voltage is more effective for insulation assessment than non-power frequency high voltage, regulations stipulate that the AC withstand voltage test of the generator stator winding must be performed within 50 hours. Z The test is conducted under power frequency conditions to detect potential electrical faults and weaknesses. As generator capacity and voltage levels continue to increase, the demand for power frequency withstand voltage testing equipment also increases.

[0003] In traditional technologies, power frequency withstand voltage test devices are large and heavy, making them inconvenient for on-site transportation. While frequency modulation resonant withstand voltage test devices can reduce the capacity of the test equipment, these devices often only adjust the voltage frequency to a near-power frequency range, not the true 50Hz power frequency, and cannot accurately reflect the insulation condition of the generator during actual operation, thus reducing the effectiveness of the test. Utility Model Content

[0004] Therefore, it is necessary to address the problem that the frequency of the AC withstand voltage test for generators cannot be accurately adjusted to 50Hz. This application provides a generator withstand voltage test system.

[0005] In a first aspect, this application provides a generator withstand voltage test system, the system comprising:

[0006] The electric control console unit, and the components connected to the electric control console unit respectively:

[0007] The electric voltage regulator unit has its input side connected to the power supply.

[0008] The primary side of the excitation transformer unit is connected to the output side of the electric voltage regulator;

[0009] The adjustable reactor unit has its low-voltage side connected to the high-voltage start-end of the secondary side of the excitation transformer unit, and its high-voltage side connected to the capacitor divider unit and the generator under test.

[0010] The capacitor voltage divider unit is connected in parallel with the generator under test.

[0011] In one embodiment, the system includes a first adjustable reactor unit and a second adjustable reactor unit connected in parallel; the two ends of the first adjustable reactor unit and the second adjustable reactor unit are respectively connected to an excitation transformer unit and a generator under test.

[0012] In one embodiment, the electric voltage regulator unit includes:

[0013] A single-phase column-type voltage regulator is connected to the power supply after being connected to the excitation transformer unit.

[0014] The first current transformer is installed between the single-phase column voltage regulator and the power supply to monitor the power supply current.

[0015] The second current transformer is located at the connection between the single-phase column voltage regulator and the excitation transformer unit, and is used to monitor the output current of the single-phase column voltage regulator.

[0016] In one embodiment, the input terminal of the single-phase column voltage regulator is connected to the power supply terminal, and the output terminal of the single-phase column voltage regulator is connected to the low-voltage side start and end terminals of the excitation transformer.

[0017] In one embodiment, the high-voltage side of the excitation transformer unit further includes:

[0018] The instrument winding has its first end connected to the peak voltage meter and its last end connected to the high voltage tail end of the secondary side of the excitation transformer unit.

[0019] The third current transformer is installed at the high-voltage tail end of the secondary side of the excitation transformer unit and is used to monitor the secondary side current of the excitation transformer unit.

[0020] In one embodiment, the high-voltage head end of the secondary side of the excitation transformer unit is provided with multiple high-voltage terminals for outputting different voltage levels.

[0021] In one embodiment, the adjustable reactor unit includes:

[0022] The adjustable reactor is equipped with low-voltage windings and high-voltage windings. Different voltage levels of low-voltage windings or high-voltage windings can be selected according to test requirements.

[0023] In one embodiment, the low-voltage side of the high-voltage winding of the adjustable reactor is connected to the excitation transformer unit, and the high-voltage side of the high-voltage winding of the adjustable reactor is connected to the generator under test; or

[0024] The low-voltage side of the low-voltage winding of the adjustable reactor is connected to the excitation transformer unit, and the high-voltage side of the low-voltage winding of the adjustable reactor is connected to the generator under test.

[0025] In one embodiment, the capacitor voltage divider unit includes:

[0026] A high-voltage capacitor, the first terminal of which is connected to the adjustable reactor unit;

[0027] The low-voltage capacitor has its first terminal connected to the second terminal of the high-voltage capacitor, and the second terminal of the low-voltage capacitor is connected to the grounding grid.

[0028] In one embodiment, the first adjustable reactor unit and the second adjustable reactor unit are connected in parallel and then connected to the generator under test to increase the system capacity.

[0029] The aforementioned generator withstand voltage test system employs adjustable reactors connected in series. The inductance of the reactors is smoothly and infinitely adjusted according to the capacitance of the generator under test, causing the generator to resonate at a 50Hz power frequency and generate high voltage. This significantly reduces the power supply capacity, size, and weight of the test equipment. The electric voltage regulator unit, connected to the power supply and precisely adjusting the input voltage, can adjust the voltage level according to different test requirements during the generator withstand voltage test. The excitation transformer unit provides high voltage and, through its transformation function, outputs the required voltage to downstream equipment, providing a stable high-voltage source. Simultaneously, the adjustable reactor unit further optimizes current and voltage characteristics, adjusts load characteristics, and avoids adverse effects of overvoltage or overcurrent on the test system. The capacitor voltage divider unit effectively distributes and reduces voltage in high-voltage environments, ensuring the generator under test withstands the correct voltage load and avoiding test errors caused by excessively low or high test voltage. The electric control console unit allows for convenient adjustment and monitoring of the current and voltage of each unit circuit in the test system, enabling timely detection of abnormal phenomena during the test process and ensuring high safety. Attached Figure Description

[0030] To more clearly illustrate the technical solutions in the embodiments of this application or the conventional technology, the drawings used in the description of the embodiments or the conventional technology will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0031] Figure 1 This is a schematic diagram of the generator withstand voltage test system in some embodiments of this application.

[0032] Figure 2 The circuit diagrams are shown for the generator withstand voltage test systems in some embodiments of this application.

[0033] Figure 3 This is a schematic diagram of the generator withstand voltage test system in another embodiment of this application.

[0034] Figure 4 This is a circuit diagram of a generator withstand voltage test system according to another embodiment of this application.

[0035] Explanation of icon numbers:

[0036] 102. Electric control console unit; 104. Electric voltage regulator unit; 106. Excitation transformer unit; 108. First adjustable reactor unit; 110. Capacitive voltage divider unit; 112. Test generator; 114. Control console terminal block; 116. Voltage regulator terminal block; 118. Second adjustable reactor unit. Detailed Implementation

[0037] To make the above-mentioned objectives, features, and advantages of this application more apparent and understandable, the specific embodiments of this application are described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a thorough understanding of this application. However, this application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this application. Therefore, this application is not limited to the specific embodiments disclosed below.

[0038] In the description of this application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0039] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0040] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise expressly limited. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0041] In this application, unless otherwise expressly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0042] It should be noted that when an element is referred to as being "fixed to" or "set on" another element, it can be directly on the other element or there may be an intervening element. When an element is considered to be "connected to" another element, it can be directly connected to the other element or there may be an intervening element. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only possible implementation.

[0043] Reference Figure 1 One embodiment of this application provides a generator withstand voltage test system, including an electric control console unit 102, and connected to the electric control console unit 102 respectively: an electric voltage regulator unit 104, an excitation transformer unit 106, an adjustable reactor unit, and a capacitor voltage divider unit 110; the input side of the electric voltage regulator unit 104 is connected to a power supply; the primary side of the excitation transformer unit 106 is connected to the output side of the electric voltage regulator; the low-voltage side of the adjustable reactor unit is connected to the high-voltage start terminal of the secondary side of the excitation transformer unit 106, and the high-voltage side of the adjustable reactor unit is connected to the capacitor voltage divider unit 110 and the generator under test 112; the capacitor voltage divider unit 110 and the generator under test 112 are connected in parallel, and the capacitor voltage divider unit 110 and the generator under test 112 are connected to the high-voltage side of the adjustable reactor unit.

[0044] The electric control console unit 102 controls the entire generator withstand voltage test system, featuring electric adjustment, monitoring and display, and safety control functions. The electric voltage regulator unit 104 is a device for adjusting voltage, capable of precisely adjusting the input voltage according to test requirements to meet different voltage demands of the generator withstand voltage test. The input side of the electric voltage regulator unit 104 is connected to the power supply, stabilizing the output voltage by controlling its magnitude. The excitation transformer unit 106 provides high voltage; its primary side is connected to the output side of the electric voltage regulator unit 104, increasing or decreasing the input voltage through transformation, and supplying the required output voltage to downstream equipment, ensuring a stable high-voltage source during the generator withstand voltage test. The adjustable reactor unit is a device with adjustable reactance characteristics, used to adjust the current or voltage characteristics in the system. The low-voltage side of the adjustable reactor unit is connected to the high-voltage head of the secondary side of the excitation transformer unit 106, and the high-voltage side is connected to the capacitor divider unit 110 and the generator under test 112, serving to adjust the load characteristics. The capacitor voltage divider unit 110 is used to reduce or divide the voltage in a high-voltage system. The capacitor voltage divider unit 110 is connected in parallel with the generator under test 112, distributing the voltage through capacitors to ensure the generator withstands the correct voltage load during the test. The generator under test 112 refers to the actual generator that needs to undergo a withstand voltage test. The generator under test 112 is connected to the capacitor voltage divider unit 110 and the adjustable reactor unit of the generator withstand voltage test system. During the test, it withstands the high voltage output from the adjustable reactor unit to test its withstand voltage capability and operational performance.

[0045] In this embodiment, adjustable reactors are connected in series. The inductance of the reactors is smoothly and infinitely adjusted according to the capacitance of the generator under test 112, so that the generator under test 112 resonates at a 50Hz power frequency, generating high voltage. This greatly reduces the power supply capacity and the size and weight of the test equipment. The electric voltage regulator unit 104, by connecting to the power supply and precisely adjusting the input voltage, can adjust the voltage level according to different test requirements during the generator withstand voltage test. The excitation transformer unit 106 can provide high voltage and, through transformation, output the required voltage to supply the downstream equipment, providing a stable high-voltage source. At the same time, the coordinated adjustment of the adjustable reactor unit further optimizes the current and voltage characteristics, adjusts the load characteristics, and avoids the adverse effects of overvoltage or overcurrent on the test system. The capacitor voltage divider unit 110 can achieve effective voltage distribution and reduction in a high-voltage environment, ensuring that the generator under test 112 bears the correct voltage load and avoiding test errors caused by excessively low or high test voltage. The electric control console unit 102 can conveniently adjust and monitor the current and voltage of each unit circuit of the test system, and abnormal phenomena can be detected in a timely manner during the test process, ensuring high safety.

[0046] Reference Figure 1 and Figure 2 In some embodiments, the electric voltage regulator unit 104 includes a single-phase column voltage regulator, a first current transformer TA1, and a second current transformer TA2. The single-phase column voltage regulator and the excitation transformer unit 106 are connected in parallel and then connected to the power supply. The first current transformer TA1 is disposed between the single-phase column voltage regulator and the power supply and is used to monitor the power supply current. The second current transformer TA2 is disposed between the single-phase column voltage regulator and the excitation transformer unit 106 and is used to monitor the output current of the single-phase column voltage regulator.

[0047] The input terminal of the single-phase column-type voltage regulator is connected to the power supply terminal, and the output terminal of the single-phase column-type voltage regulator is connected to the first and last terminals of the low-voltage side of the excitation transformer. The electric control console unit 102 is equipped with a power supply ammeter A1, a voltage regulator output ammeter A2, a transformer ammeter A3, a first reactor ammeter A4, a second reactor ammeter A5, a power supply voltmeter V1, a voltage regulator output voltmeter V2, a reactor high-voltage voltmeter V3, and a control console terminal block 114. All ammeters and voltmeters are digital display ammeters and voltmeters, respectively.

[0048] Specifically, a linkage switch K is installed at both the first and second ends of the single-phase column-type voltage regulator. The linkage switch K controls the on / off switching of power supply to the single-phase column-type voltage regulator. A current transformer TA1 is designed on the input side of the single-phase column-type voltage regulator. The output of the first current transformer TA1 is connected to the power ammeter A1 of the control console via a 31-core connector, enabling the electric control console unit 102 to monitor the power supply current. The input of the single-phase column-type voltage regulator is connected to the power voltmeter V1 of the electric control console unit 102 via a 31-core connector, enabling the electric control console unit 102 to monitor the power supply voltage. Additionally, a second current transformer TA2 is designed on the output side of the single-phase column-type voltage regulator. The output of the second current transformer TA2 is connected to the voltage regulator output ammeter A2 of the electric control console unit 102 via a 31-core connector, enabling the electric control console unit 102 to monitor the output current of the single-phase column-type voltage regulator. The output side of the single-phase column-type voltage regulator is connected to the voltage regulator output voltmeter V2 of the electric control unit 102 via a 31-core aviation connector, enabling the electric control unit 102 to monitor the voltage regulator output voltage. The voltage regulator terminal block 116 of the electric voltage regulator unit 104 is designed with input A terminal, input B terminal, input C terminal, neutral terminal, 31-core aviation connector, high-voltage current 1 terminal, high-voltage current 2 terminal, high-voltage current 3 terminal, high-voltage current 4 terminal, output 1 terminal, output 2 terminal, and ground terminal. Input A terminal, input B terminal, input C terminal, and neutral terminal are connected to the power supply (three-phase four-wire 380V); the 31-core aviation connector of the electric voltage regulator unit 104 is connected to the 31-core aviation connector of the electric control unit 102 via a 31-core aviation connector wire.

[0049] In some embodiments, the high-voltage side of the excitation transformer unit 106 further includes an instrument winding and a third current transformer; the first end of the instrument winding is connected to a peak voltage meter, and the last end of the instrument winding is connected to the high-voltage tail end of the secondary side of the excitation transformer unit 106; the third current transformer is disposed at the high-voltage tail end of the secondary side of the excitation transformer unit 106 and is used to monitor the secondary side current of the excitation transformer unit 106.

[0050] The high-voltage terminal of the secondary side of the excitation transformer unit 106 is provided with multiple high-voltage terminals for outputting different voltage levels.

[0051] Specifically, the excitation transformer unit 106 includes an excitation transformer (such as a single-phase oil-immersed self-cooled transformer) and a third current transformer TA3. The primary side of the excitation transformer is designed with input terminals a and x, and the high-voltage start-end of the secondary side is designed with terminals A1, A2, and A3. The rated voltage of terminal A1 is 2kV, terminal A2 is 4kV, and terminal A3 is 6kV; different voltage levels of high-voltage terminals can be selected according to test requirements. The third current transformer TA3 is installed at terminal X of the high-voltage tail end of the secondary side of the excitation transformer. The output terminals p1 and p2 of the third current transformer TA3 are electrically connected to the transformer ammeter A3 of the electric control unit 102 through excitation current terminals 1 and 2, enabling the electric control unit 102 to monitor the secondary current of the excitation transformer.

[0052] The secondary side of the excitation transformer is designed with instrument windings a1-a2. Without a capacitor divider, instrument windings a1-a2 can be connected to an external peak voltmeter to enable the electric control unit 102 to monitor the output voltage of the secondary side of the excitation transformer. When instrument windings a1-a2 are not in use, one terminal of the instrument winding is grounded.

[0053] In some embodiments, the adjustable reactor unit includes an adjustable reactor, which is provided with a low-voltage winding and a high-voltage winding, and the low-voltage winding or the high-voltage winding of different voltage levels is selected according to the test requirements.

[0054] In this configuration, the first end of the high-voltage winding of the adjustable reactor is connected to the excitation transformer unit 106, and the second end of the high-voltage winding of the adjustable reactor is connected to the generator under test; or the first end of the low-voltage winding of the adjustable reactor is connected to the excitation transformer unit 106, and the second end of the low-voltage winding of the adjustable reactor is connected to the generator under test.

[0055] Specifically, the first adjustable reactor unit 108 includes an adjustable reactor and a fourth current transformer TA4. The adjustable reactor is an oil-immersed adjustable reactor with an iron core, whose core gap can be smoothly and infinitely finely adjusted to change the reactor inductance value. The adjustable reactor is designed with a high-voltage Y1-B1 winding and a low-voltage Y2-B2 winding. The voltage rating of the Y1-B1 winding is 40kV, and the voltage rating of the Y2-B2 winding is 60kV. Different voltage rating windings can be selected according to test requirements. In addition, the low-voltage Y1 terminal of the first adjustable reactor is designed with a fourth current transformer TA4. The output terminals k1 and k2 of the fourth current transformer TA4 are electrically connected to the first reactor ammeter A4 of the electric control unit 102 through high-voltage current terminals 1 and 2, realizing the function of the electric control unit 102 to monitor the output current of the high-voltage B1 terminal of the reactor. The adjustable reactor's low-voltage Y2 terminal is designed with a fifth current transformer TA5. The output terminals k3 and k4 of the fifth current transformer TA5 are electrically connected to the first reactor ammeter A4 of the electric control unit 102 through the high-voltage current terminal 1 and the high-voltage current terminal 2, so as to realize the function of the electric control unit 102 to monitor the output current of the reactor's high-voltage B2 terminal.

[0056] Reference Figure 3 and Figure 4 In a further embodiment, the system includes a first adjustable reactor unit 108 and a second adjustable reactor unit 118, which are connected in parallel; the two ends of the first adjustable reactor unit 108 and the second adjustable reactor unit 118 are respectively connected to the excitation transformer unit 106 and the generator under test 112.

[0057] The first adjustable reactor unit 108 and the second adjustable reactor unit 118 are connected in parallel to the generator under test 112 to increase the system capacity. When the system uses the first adjustable reactor unit 108 and the second adjustable reactor unit 118, the output terminals of the current transformer designed in the second reactor unit are electrically connected to the second reactor ammeter A5 of the electric control unit 102 through high-voltage current terminals 3 and 4, enabling the electric control unit 102 to monitor the output current of the second reactor's high-voltage terminals. The 31-core aviation connector of the electric control unit 102 is connected to the 31-core aviation connector of the electric voltage regulator unit 104 through a 31-core aviation connector wire. The 12-core aviation connector 1 is connected to the 12-core aviation connector of the adjustable reactor core gap adjustment motor through a 12-core aviation connector wire. The 22-core aviation connector 2 is connected to the 12-core aviation connector of the second adjustable reactor unit 118 through a 12-core aviation connector wire.

[0058] In this embodiment, by designing two twelve-pin aviation connector interfaces, the system can simultaneously connect two adjustable reactor units, doubling the capacity of the test system and making it suitable for power frequency AC withstand voltage tests of generators with larger electrical capacities.

[0059] Reference Figure 1 and Figure 2 In some embodiments, the capacitor divider unit 110 includes a high-voltage capacitor and a low-voltage capacitor. The first terminal of the high-voltage capacitor is connected to the adjustable reactor unit. The first terminal of the low-voltage capacitor is connected to the second terminal of the high-voltage capacitor, and the second terminal of the low-voltage capacitor is connected to the grounding grid.

[0060] Specifically, the capacitive voltage divider unit 110 consists of a high-voltage capacitor C1 and a low-voltage capacitor C2 connected in series. The high-voltage capacitor is connected to the adjustable reactor unit, and the low-voltage capacitor is grounded. The two ends of the low-voltage capacitor are electrically connected to the high-voltage voltmeter V3 of the reactor in the electric control unit 102 via high-voltage voltage terminal 1 and high-voltage voltage terminal 2, enabling the electric control unit 102 to monitor the high-voltage side voltage of the reactor. The high-voltage voltage terminal 1 and high-voltage voltage terminal 2 of the electric control unit 102 are connected to the low-voltage side of the capacitive voltage divider unit 110.

[0061] In this embodiment, the capacitor voltage divider unit 110 can effectively distribute and reduce voltage in a high-voltage environment, ensuring that the generator under test 112 bears the correct voltage load, avoiding test errors caused by excessively low or high test voltage, and improving the accuracy of the withstand voltage test.

[0062] Please refer to Figure 3 and Figure 4 In some embodiments, the electric control console unit 102 directly displays the current and voltage of each unit in the system via instruments. The control console terminal block 114 is designed with a grounding terminal, a high voltage 1 terminal, a high voltage 2 terminal, a 31-pin aviation connector terminal, a 12-pin aviation connector 1 terminal, and a 22-pin aviation connector 2 terminal.

[0063] The grounding terminal of the electric control console unit 102 is connected to the grounding grid via a grounding wire. High voltage terminal 1 and high voltage terminal 2 are connected to the low voltage terminal of the capacitor voltage divider unit 110. The 31-core connector of the electric control console unit 102 is connected to the 31-core connector of the electric voltage regulator unit 104 via a 31-core connector wire. The 12-core connector 1 is connected to the 12-core connector of the adjustable reactor core gap adjustment motor via a 12-core connector wire. The 22-core connector 2 is connected to the 12-core connector of the adjustable second reactor unit via a 12-core connector wire. By designing two 12-core connector interfaces, the test system can simultaneously connect two adjustable reactor units, doubling the test system capacity and making it suitable for AC withstand voltage tests of generators with larger capacitance.

[0064] The voltage regulator terminal block 116 is designed with input A terminal, input B terminal, input C terminal, neutral terminal, 31-core aviation connector terminal, high-voltage current 1 terminal, high-voltage current 2 terminal, high-voltage current 3 terminal, high-voltage current 4 terminal, output 1 terminal, output 2 terminal, and ground terminal. Input A terminal, input B terminal, input C terminal, and neutral terminal are connected to a three-phase four-wire 380V power supply. The 31-core aviation connector terminal of the electric voltage regulator unit 104 is connected to the 31-core aviation connector terminal of the electric control console unit 102 via a 31-core aviation connector wire. When the adjustable reactor unit uses the high-voltage Y1-B1 winding, the high-voltage current 1 terminal and high-voltage current 2 terminal are connected to the output k1 and k2 terminals of the fourth current transformer TA4. The output k3 and k4 terminals of the fifth current transformer TA5 are short-circuited. When the adjustable reactor uses the low-voltage Y2-B2 winding, the high-voltage current 1 terminal and high-voltage current 2 terminal are connected to the output k3 and k4 terminals of the fifth current transformer TA5. The output terminals k1 and k2 of current transformer TA4 are short-circuited. High-voltage current terminals 3 and 4 are connected to the output terminals of the current transformer used in the winding of the second adjustable reactor unit 118. Output terminals 1 and 2 are connected to terminals a and x on the primary side of the excitation transformer. Excitation current terminals 1 and 2 are connected to the output terminals p1 and p2 of the third current transformer TA3. The grounding terminal of the electric voltage regulator unit 104 is connected to the grounding grid via a grounding wire.

[0065] The X and a2 terminals of the excitation transformer are connected to the grounding terminal of the excitation transformer unit 106, and the grounding terminal of the excitation transformer is connected to the grounding grid through a grounding wire. The high-voltage A1, A2, and A3 terminals of the excitation transformer are connected to the low-voltage Y1 or Y2 terminal of the adjustable reactor.

[0066] The high-voltage terminals B1 and B2 of the adjustable reactor unit are connected to the high-voltage terminal of the capacitor divider unit 110. When the system uses two adjustable reactor units, the windings of the two adjustable reactors are connected in parallel.

[0067] The grounding terminal of the capacitor voltage divider unit 110 is connected to the grounding grid through a grounding wire, and the high-voltage end of the capacitor voltage divider unit 110 is connected to the generator under test 112.

[0068] In the description of this specification, references to terms such as "some embodiments," "other embodiments," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of this application. In this specification, the illustrative descriptions of the above terms do not necessarily refer to the same embodiments or examples.

[0069] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0070] The embodiments described above are merely illustrative of several implementation methods of this application, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the protection scope of this application. Therefore, the protection scope of this patent application should be determined by the appended claims.

Claims

1. A generator withstand voltage test system, characterized in that, The system includes: An electric control console unit, and components connected to the electric control console unit respectively: An electric voltage regulator unit, wherein the input side of the electric voltage regulator is connected to a power supply; An excitation transformer unit, wherein the primary side of the excitation transformer unit is connected to the output side of the electric voltage regulator; An adjustable reactor unit, wherein the low-voltage side of the adjustable reactor unit is connected to the high-voltage start terminal of the secondary side of the excitation transformer unit, and the high-voltage side of the adjustable reactor unit is connected to the capacitor divider unit and the generator under test; A capacitor voltage divider unit is connected in parallel with the generator under test.

2. The system according to claim 1, characterized in that, The system includes a first adjustable reactor unit and a second adjustable reactor unit, which are connected in parallel. The two ends of the first adjustable reactor unit and the second adjustable reactor unit are respectively connected to the excitation transformer unit and the generator under test.

3. The system according to claim 1, characterized in that, The electric voltage regulator unit includes: A single-phase column-type voltage regulator, which is connected to the excitation transformer unit and then connected to the power supply; The first current transformer is installed between the single-phase column voltage regulator and the power supply for monitoring the power supply current. A second current transformer is connected between the single-phase column voltage regulator and the excitation transformer unit, and is used to monitor the output current of the single-phase column voltage regulator.

4. The system according to claim 3, characterized in that, The input terminal of the single-phase column voltage regulator is connected to the power supply terminal, and the output terminal of the single-phase column voltage regulator is connected to the low-voltage side start and end terminals of the excitation transformer.

5. The system according to claim 1, characterized in that, The high-voltage side of the excitation transformer unit also includes: An instrument winding, the first end of which is connected to a peak voltage meter, and the last end of which is connected to the high-voltage tail end of the secondary side of the excitation transformer unit; The third current transformer is installed on the connection line at the high voltage tail end of the secondary side of the excitation transformer unit, and is used to monitor the secondary side current of the excitation transformer unit.

6. The system according to claim 1, characterized in that, The high-voltage terminal on the secondary side of the excitation transformer unit is equipped with multiple high-voltage terminals for outputting different voltage levels.

7. The system according to claim 1, characterized in that, The adjustable reactor unit includes: The adjustable reactor is equipped with low-voltage windings and high-voltage windings. Different voltage levels of low-voltage windings or high-voltage windings can be selected according to test requirements.

8. The system according to claim 7, characterized in that, The low-voltage side of the high-voltage winding of the adjustable reactor is connected to the excitation transformer unit, and the high-voltage side of the high-voltage winding of the adjustable reactor is connected to the generator under test; or The low-voltage side of the low-voltage winding of the adjustable reactor is connected to the excitation transformer unit, and the high-voltage side of the low-voltage winding of the adjustable reactor is connected to the generator under test.

9. The system according to claim 1, characterized in that, The capacitor voltage divider unit includes: A high-voltage capacitor, the first terminal of which is connected to the adjustable reactor unit; A low-voltage capacitor, the first terminal of which is connected to the second terminal of the high-voltage capacitor, and the second terminal of which is connected to the grounding grid.

10. The system according to claim 2, characterized in that, The first adjustable reactor and the second adjustable reactor are connected in parallel and then connected to the generator under test to increase the system capacity.

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