Pump storage test system

Abstract

The application provides a pumped storage test system, which comprises a driving motor, an AC excitation motor, a motor control module and a motor control module; wherein the motor control module comprises a rotor excitation unit and a stator grid-connected control unit, the input end of the rotor excitation unit is electrically connected with a power grid, and the output end of the rotor excitation unit is electrically connected with the rotor winding of the AC excitation motor to excite the rotor winding; the stator grid-connected control unit is electrically connected with the power grid, and the stator grid-connected control unit is electrically connected with the stator winding of the AC excitation motor to electrify the stator winding and start the AC excitation motor, or grid-connect the voltage output by the stator winding. The application adopts the driving motor to replace the water pump water turbine, so that the arrangement of the pumped storage test system is not limited by environmental factors, thereby facilitating the operation test of the pumped storage unit.

Description

Technical Field

[0001] This application relates to the field of pumped storage technology, specifically to a pumped storage test system. Background Technology

[0002] Currently, pumped storage power stations have the characteristics of peak shaving and valley filling, and can play a role in peak shaving, frequency regulation, and phase regulation in the power grid, which is conducive to maintaining the safe and stable operation of the power grid. Therefore, they have gradually become an effective and indispensable regulation means for my country's power system.

[0003] In related technologies, pumped storage units mainly consist of a pump-turbine and a generator-motor, with the pump-turbine's rotating main shaft connected to the generator-motor's rotating main shaft. In the power generation mode, water flows from a higher elevation to a lower elevation, scouring the pump-turbine's impeller. This causes the pump-turbine's rotating main shaft to drive the generator-motor's rotating main shaft, which then functions as a generator to produce electricity. In the pumping mode, the generator-motor is energized, causing its rotating main shaft to rotate. In this mode, the generator-motor functions as a motor, and its rotating main shaft drives the pump-turbine's rotating main shaft, thus pumping water from a lower elevation to a higher elevation for energy storage.

[0004] Therefore, by operating pumped-storage hydroelectric units in power generation mode during peak daytime electricity demand and in pumping mode during off-peak nighttime demand, peak shaving and valley filling functions can be achieved for the power grid. Currently, conducting operational tests of pumped-storage hydroelectric units is of great significance for ensuring the safe and stable operation of the power grid. However, the placement of pumped-storage hydroelectric units is limited by the natural environment (requiring water resources with significant elevation differences), which restricts the conduct of pumped-storage tests. Utility Model Content

[0005] This application provides a pumped storage test system, which aims to solve the above-mentioned technical problems.

[0006] In a first aspect, this application provides a pumped storage test system, comprising:

[0007] The drive motor and the AC excitation generator motor are connected in a transmission connection;

[0008] The motor control module is electrically connected to the power grid and to the drive motor to control whether the drive motor is connected to the power grid and starts.

[0009] The motor control module is connected to the power grid and is electrically connected to the AC excitation generator motor to control the start of the AC excitation generator motor or to connect the output voltage of the AC excitation generator motor to the grid.

[0010] The motor control module includes a rotor excitation unit and a stator grid-connected control unit. The input of the rotor excitation unit is electrically connected to the power grid, and the output of the rotor excitation unit is electrically connected to the rotor winding of the AC excitation generator motor to excite the rotor winding.

[0011] The stator grid-connected control unit is electrically connected to the power grid and to the stator winding of the AC excitation generator motor, so as to energize the stator winding and start the AC excitation generator motor, or to connect the voltage output from the stator winding to the grid.

[0012] In some embodiments, the rotor excitation unit includes a first circuit breaker, a voltage regulator, and a first converter;

[0013] The first terminal of the first circuit breaker is electrically connected to the power grid, and the second terminal of the first circuit breaker is electrically connected to the input terminal of the voltage regulator.

[0014] The output terminal of the voltage regulator is electrically connected to the input terminal of the first converter, and the output terminal of the first converter is electrically connected to the rotor winding of the AC excitation generator motor.

[0015] In some embodiments, the stator grid-connected control unit includes a second circuit breaker;

[0016] The first terminal of the second circuit breaker is electrically connected to the power grid, and the second terminal of the second circuit breaker is electrically connected to the stator winding of the AC excitation generator motor.

[0017] In some embodiments, the stator grid-connected control unit further includes a first voltage transformer and a second voltage transformer;

[0018] The first voltage transformer is electrically connected to the first terminal of the second circuit breaker, and the second voltage transformer is connected to the second terminal of the second circuit breaker.

[0019] In some embodiments, the stator grid-connected control unit further includes a first current transformer and a second current transformer;

[0020] The first current transformer is coupled to the first terminal of the second circuit breaker, and the second current transformer is coupled to the second terminal of the second circuit breaker.

[0021] In some embodiments, the motor control module further includes a transformer unit;

[0022] The first end of the transformer unit is electrically connected to the power grid, the second end of the transformer unit is electrically connected to the rotor excitation unit, and the second end of the transformer unit is electrically connected to the stator grid-connected control unit.

[0023] In some embodiments, the transformer unit includes a third circuit breaker and a transformer;

[0024] The first terminal of the third circuit breaker is connected to the power grid, and the second terminal of the third circuit breaker is connected to the first terminal of the transformer.

[0025] The second end of the transformer is electrically connected to the rotor excitation unit, and the second end of the transformer is electrically connected to the stator grid-connected control unit.

[0026] In some embodiments, the motor control module includes a fourth circuit breaker;

[0027] The first terminal of the fourth circuit breaker is electrically connected to the power grid, and the second terminal of the fourth circuit breaker is electrically connected to the drive motor.

[0028] In some embodiments, the motor control module further includes a second converter;

[0029] The input terminal of the second converter is electrically connected to the power grid, and the output terminal of the second converter is electrically connected to the first terminal of the fourth circuit breaker.

[0030] In some embodiments, the motor control module further includes a fifth circuit breaker;

[0031] The first terminal of the fifth circuit breaker is connected to the power grid, and the second terminal of the fifth circuit breaker is connected to the input terminal of the second converter.

[0032] This application utilizes a motor control module to control whether the drive motor is connected to the power grid, and uses the rotor excitation unit of the motor control module to control the excitation of the rotor winding of the AC excitation generator motor. Furthermore, it uses the stator grid-connection control unit of the motor control module to control the energization of the stator winding of the AC excitation generator motor or to connect the voltage output from the stator winding to the grid. This allows for testing of the pumped storage unit under various operating conditions, including power generation and pumping. Because a drive motor replaces the water pump and turbine, the layout of the pumped storage test system is not limited by environmental factors, thus facilitating the conduct of operational tests on the pumped storage unit. Attached Figure Description

[0033] To more clearly illustrate the technical solutions in the embodiments of this application, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0034] Figure 1 A schematic diagram of a pumped storage test system according to an embodiment of this application is shown;

[0035] Figure 2 Another schematic diagram of the pumped storage test system in the embodiments of this application is shown;

[0036] Figure 3Another schematic diagram of the pumped storage test system in the embodiments of this application is shown;

[0037] Figure 4 Another schematic diagram of the pumped storage test system in the embodiments of this application is shown;

[0038] Figure 5 Another schematic diagram of the pumped storage test system in the embodiments of this application is shown;

[0039] Figure 6 Another schematic diagram of the pumped storage test system in an embodiment of this application is shown.

[0040] Among them, 10 is the drive motor, 20 is the AC excitation generator motor, 21 is the rotor winding, 22 is the stator winding, 30 is the motor control module, 31 is the fourth circuit breaker, 32 is the second converter, 33 is the fifth circuit breaker, 40 is the motor control module, 41 is the rotor excitation unit, 411 is the first circuit breaker, 412 is the voltage regulator, 413 is the first converter, 42 is the stator grid-connected control unit, 421 is the second circuit breaker, 422 is the first voltage transformer, 423 is the second voltage transformer, 43 is the transformer unit, 431 is the transformer, and 432 is the third circuit breaker. Detailed Implementation

[0041] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0042] In the description of this utility model, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating orientation or positional relationships based on the orientation or positional relationships shown in the accompanying drawings, are only for the convenience of describing this utility model 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 utility model. 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 indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include one or more of the stated features. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0043] In this application, the term "exemplary" is used to mean "serving as an example, illustration, or description." Any embodiment described as "exemplary" in this application is not necessarily to be construed as being more preferred or advantageous than other embodiments. The following description is provided to enable any person skilled in the art to implement and use the present invention. Details are set forth in the following description for purposes of explanation. It should be understood that those skilled in the art will recognize that the present invention can be implemented without using these specific details. In other instances, well-known structures and processes will not be described in detail to avoid obscuring the description of the present invention with unnecessary detail. Therefore, the present invention is not intended to be limited to the embodiments shown, but is consistent with the broadest scope of the principles and features disclosed in this application.

[0044] This application provides a pumped storage test system, which will be described in detail below.

[0045] First, refer to Figure 1 , Figure 1 A schematic diagram of a pumped storage test system according to an embodiment of this application is shown. The pumped storage test system includes a drive motor 10, an AC excitation generator motor 20, a motor control module 30, and a motor control module 40.

[0046] Specifically, the drive motor 10 is connected to the AC excitation generator motor 20. The drive motor 10 is used as the pump turbine of the pumped storage unit in the pumped storage test system. After the drive motor 10 is powered on and started, the drive motor 10 can drive the rotor of the AC excitation generator motor 20 to rotate through the transmission mechanism, so as to simulate the power generation conditions of the pumped storage unit.

[0047] For example, the drive motor 10 may be, but is not limited to, a permanent magnet synchronous motor or an asynchronous motor. The permanent magnet synchronous motor may be such as a permanent magnet synchronous AC motor or a permanent magnet synchronous DC motor, and the asynchronous motor may be such as a single-phase asynchronous motor or a three-phase asynchronous motor.

[0048] The AC-excited generator motor 20 is a generator motor in the pumped storage unit. The AC-excited generator motor 20 has a rotor and a stator. The stator is wound with a stator winding 22, and the rotor is wound with a rotor winding 21. The AC-excited generator motor 20 can work as a generator or as a motor in the pumped storage unit.

[0049] For example, when the rotor winding 21 of the AC excitation generator motor 20 is energized, it can generate a magnetic field. After the drive motor 10 drives the rotor of the AC excitation generator motor 20 to rotate, the rotational motion of the rotor causes the stator winding 22 to cut the magnetic field of the rotor winding 21 and generate current. Therefore, the stator winding 22 of the AC excitation generator motor 20 can output current. At this time, the AC excitation generator motor 20 works as a generator to simulate the power generation conditions of a pumped storage unit.

[0050] For example, when the rotor winding 21 of the AC excitation generator motor 20 is energized, a magnetic field is generated. When the stator winding 22 of the AC excitation generator motor 20 is energized, the rotor of the AC excitation generator motor 20 can be driven to rotate under the action of the magnetic field force. At this time, the AC excitation generator motor 20 works as a motor, and the AC excitation generator motor 20 drives the rotor of the drive motor 10 to rotate, so as to simulate the pumping operation of the pumped storage unit.

[0051] The motor control module 30 is electrically connected to the power grid and to the drive motor 10, so as to control whether the drive motor 10 is connected to the power grid and started. In some embodiments of this application, such as for embodiments where the drive motor 10 is a DC motor, the motor control module 30 may include an AC / DC converter and a switch, so as to convert the AC voltage of the power grid to DC voltage through the AC / DC converter, and control whether the drive motor 10 is connected to DC voltage and started through the switch. In some embodiments of this application, such as for embodiments where the drive motor 10 is an AC motor, the motor control module 30 may include a transformer 431 and a switch, so as to convert the AC voltage of the power grid to a suitable AC voltage through the transformer 431, and control whether the drive motor 10 is connected to AC voltage and started through the switch.

[0052] The motor control module 40 is connected to the power grid and electrically connected to the AC excitation generator motor 20, so as to control the start of the AC excitation generator motor 20 or to connect the output voltage of the AC excitation generator motor 20 to the grid. For example, after the drive motor 10 drives the rotor of the AC excitation generator motor 20 to rotate, the motor control module 40 can control the voltage output of the stator winding 22 of the AC excitation generator motor 20 to be connected to the power grid. As another example, the motor control module 40 can control the stator winding 22 of the AC excitation generator motor 20 to be connected to the grid voltage, causing the rotor of the AC excitation generator motor 20 to rotate, thereby causing the AC excitation generator motor 20 to drive the rotor of the drive motor 10 to rotate and simulating the pumping operation of a pumped storage unit.

[0053] In this embodiment, the motor control module 40 includes a rotor excitation unit 41 and a stator grid-connected control unit 42. The input terminal of the rotor excitation unit 41 is electrically connected to the power grid, and the output terminal of the rotor excitation unit 41 is electrically connected to the rotor winding 21 of the AC excitation generator motor 20. The stator grid-connected control unit 42 is electrically connected to the power grid, and the stator grid-connected control unit 42 is electrically connected to the stator winding 22 of the AC excitation generator motor 20, thereby controlling the AC excitation generator motor 20 through the rotor excitation unit 41 and the stator grid-connected control unit 42.

[0054] For example, when simulating the start-up pumping operation of a pumped-storage unit, the motor control module 30 can control the drive motor 10 to disconnect from the power grid, and excite the rotor winding 21 of the AC excitation generator motor 20 by supplying power through the rotor excitation unit 41. After the AC excitation generator motor 20 is driven to the set speed and starts, the stator winding 22 of the AC excitation generator motor 20 is then supplied with power through the stator grid-connected control unit 42. As another example, when simulating the pumping operation of a pumped-storage unit, the motor control module 30 controls the drive motor 10 to disconnect from the power grid, excites the rotor winding 21 of the AC excitation generator motor 20 by supplying power through the rotor excitation unit 41, and supplies power to the stator winding 22 of the AC excitation generator motor 20 through the stator grid-connected control unit 42.

[0055] For example, when simulating the power generation operation of a pumped-storage unit, the motor control module 30 controls the drive motor 10 to connect to the power grid, and supplies power to the rotor winding 21 of the AC excitation generator motor 20 through the rotor excitation unit 41 for excitation. The stator grid-connection control unit 42 then connects the AC power output from the stator winding 22 of the AC excitation generator motor 20 to the power grid. As another example, when simulating the braking operation of a pumped-storage unit, the motor control module 30 controls the drive motor 10 to disconnect from the power grid, and supplies power to the rotor winding 21 of the AC excitation generator motor 20 through the rotor excitation unit 41 for braking excitation. The stator grid-connection control unit 42 then disconnects the stator winding 22 of the AC excitation generator motor 20 from the power grid.

[0056] In this embodiment, the motor control module 30 controls whether the drive motor 10 is connected to the power grid, the rotor excitation unit 41 of the motor control module 40 controls the excitation of the rotor winding 21 of the AC excitation generator motor 20, and the stator grid-connected control unit 42 of the motor control module 40 controls the energization of the stator winding 22 of the AC excitation generator motor 20 or connects the voltage output of the stator winding 22 to the grid. This allows for testing of the pumped storage unit's power generation and pumping operation conditions. Since the drive motor 10 replaces the water pump turbine, the layout of the pumped storage test system is not limited by environmental factors, which is beneficial for conducting operational tests of the pumped storage unit.

[0057] In some embodiments of this application, see Figure 2 , Figure 2 This paper illustrates another schematic diagram of the pumped storage test system in an embodiment of this application. The rotor excitation unit 41 includes a first circuit breaker 411, a voltage regulator 412, and a first converter 413. The first terminal of the first circuit breaker 411 is electrically connected to the power grid, and the second terminal is electrically connected to the input terminal of the voltage regulator 412. The output terminal of the voltage regulator 412 is electrically connected to the input terminal of the first converter 413, and the output terminal of the first converter 413 is electrically connected to the rotor winding 21 of the AC excitation generator motor 20. Specifically, the first circuit breaker 411 can control whether the system is connected to the power grid, the voltage regulator 412 can change the magnitude of the AC voltage input to the rotor winding 21, and the first converter 413 can control the frequency and / or phase of the AC voltage input to the rotor winding 21, thereby changing the magnitude and frequency of the magnetic field change in the rotor winding 21. Ultimately, this facilitates changing the rotor speed, enabling simulation tests of the power generation and pumping conditions of the variable-speed pumped storage unit.

[0058] In some embodiments of this application, see further reference. Figure 2 The stator grid-connected control unit 42 includes a second circuit breaker 421. The first terminal of the second circuit breaker 421 is electrically connected to the power grid, and the second terminal is electrically connected to the stator winding 22 of the AC excitation generator motor 20. The second circuit breaker 421 can control whether the stator winding 22 of the AC excitation generator motor 20 receives grid voltage or connects the AC voltage output from the stator winding 22 to the grid. For example, after the drive motor 10 drives the rotor of the AC excitation generator motor 20 to rotate, the second circuit breaker 421 can control the voltage output from the stator winding 22 of the AC excitation generator motor 20 to be connected to the grid. As another example, in the pumping operation of a pumped storage unit, the second circuit breaker 421 can control the stator winding 22 of the AC excitation generator motor 20 to connect to the grid voltage to drive the rotor of the AC excitation generator motor 20 to rotate.

[0059] In some embodiments of this application, see Figure 3 , Figure 3This paper illustrates another schematic diagram of the pumped storage test system in an embodiment of this application. The stator grid-connected control unit 42 further includes a first voltage transformer 422 and a second voltage transformer 423. The first voltage transformer 422 is electrically connected to the first terminal of the second circuit breaker 421, and the second voltage transformer 423 is connected to the second terminal of the second circuit breaker 421. Specifically, the first voltage transformer 422 can detect the voltage at the first terminal of the second circuit breaker 421, and the second voltage transformer 423 can detect the voltage at the second terminal of the second circuit breaker 421, thereby obtaining information such as the grid voltage and the frequency and phase of the output voltage of the stator winding 22. This allows the output voltage of the stator winding 22 to be adjusted to AC current with the same frequency and phase as the grid through the information output by the first voltage transformer 422 and the second voltage transformer 423, ultimately achieving the same frequency and phase grid connection process for the output voltage of the stator winding 22.

[0060] For example, the first voltage transformer 422 and the second voltage transformer 423 may be, but are not limited to, electromagnetic voltage transformers, capacitive voltage transformers or photoelectric voltage transformers.

[0061] In some embodiments of this application, see further reference. Figure 3 The stator grid-connected control unit 42 further includes a first current transformer and a second current transformer. The first current transformer is coupled to the first terminal of the second circuit breaker 421, and the second current transformer is coupled to the second terminal of the second circuit breaker 421. Specifically, the first current transformer can detect the current magnitude at the first terminal of the second circuit breaker 421, and the second current transformer can detect the current magnitude at the second terminal of the second circuit breaker 421, so as to combine the voltage information measured by the first voltage transformer 422 and the second voltage transformer 423 to calculate and measure the total AC power output by the AC excitation generator motor 20 and the AC power output by the stator winding 22.

[0062] For example, the first current transformer and the second current transformer may be, but are not limited to, electromagnetic voltage transformers or electronic voltage transformers.

[0063] In some embodiments of this application, see Figure 4 , Figure 4Another schematic diagram of the pumped storage test system in this embodiment is shown, wherein the motor control module 40 further includes a transformer unit 43; the first end of the transformer unit 43 is electrically connected to the power grid, the second end of the transformer unit 43 is electrically connected to the rotor excitation unit 41, and the second end of the transformer unit 43 is electrically connected to the stator grid-connected control unit 42. Specifically, the transformer unit 43 can convert the AC voltage input from the power grid into a suitable AC voltage so as to input a suitable AC voltage to the stator winding 22 of the AC excitation generator motor 20; or, the transformer unit 43 can also convert the AC voltage output from the stator winding 22 of the AC excitation generator motor 20 into an AC voltage that meets the requirements of the power grid so as to connect the AC voltage output from the stator winding 22 to the grid.

[0064] In some embodiments of this application, see Figure 5 , Figure 5 This illustration shows another schematic diagram of the pumped storage test system in an embodiment of this application. The transformer unit 43 includes a third circuit breaker 432 and a transformer 431. The first terminal of the third circuit breaker 432 is electrically connected to the power grid, and the second terminal of the third circuit breaker 432 is connected to the first terminal of the transformer 431. The second terminal of the transformer 431 is electrically connected to the rotor excitation unit 41 and the stator grid-connected control unit 42. Specifically, the transformer 431 can convert the AC voltage input from the power grid or the AC voltage output from the stator winding 22 of the AC excitation generator motor 20. The third circuit breaker 432 can control whether the transformer 431 is connected to the power grid voltage or whether it connects to the power grid with AC voltage, thereby realizing the voltage transformation and grid-connected control process of the pumped storage test system.

[0065] In some embodiments of this application, see Figure 6 , Figure 6 Another schematic diagram of the pumped storage test system in this application embodiment is shown, wherein the motor control module 30 includes a fourth circuit breaker 31; the first end of the fourth circuit breaker 31 is electrically connected to the power grid, and the second end of the fourth circuit breaker 31 is electrically connected to the drive motor 10. The fourth circuit breaker 31 can control whether the drive motor 10 is connected to the AC voltage provided by the voltage, thereby realizing the start and stop control of the drive motor 10.

[0066] In some embodiments of this application, see further reference. Figure 6 The motor control module 30 further includes a second converter 32; the input terminal of the second converter 32 is electrically connected to the power grid, and the output terminal of the second converter 32 is electrically connected to the first terminal of the fourth circuit breaker 31. Specifically, the second converter 32 can convert the AC voltage of the power grid into a DC voltage or AC voltage that meets the requirements, so that the drive motor 10 can be operated by the required DC voltage or AC voltage.

[0067] In some embodiments of this application, see further reference. Figure 6 The motor control module 30 also includes a fifth circuit breaker 33. The first terminal of the fifth circuit breaker 33 is electrically connected to the power grid, and the second terminal is connected to the input terminal of the second converter 32. Specifically, the fifth circuit breaker 33 can control whether the second converter 32 is connected to the AC voltage provided by the power grid. This not only enables the conversion and control of the AC voltage from the power grid but also improves the safety of the pumped storage test system by disconnecting the power grid.

[0068] In the above embodiments, the descriptions of each embodiment have different focuses. For parts not described in detail in a certain embodiment, please refer to the detailed descriptions of other embodiments above, which will not be repeated here.

[0069] The basic concepts have been described above. Obviously, for those skilled in the art, the detailed disclosure above is merely illustrative and does not constitute a limitation of this application. Although not explicitly stated herein, those skilled in the art may make various modifications, improvements, and corrections to this application. Such modifications, improvements, and corrections are suggested in this application, and therefore remain within the spirit and scope of the exemplary embodiments of this application.

[0070] Furthermore, this application uses specific terms to describe embodiments of the application. For example, "an embodiment," "one embodiment," and / or "some embodiments" refer to a particular feature, structure, or characteristic associated with at least one embodiment of the application. Therefore, it should be emphasized and noted that "an embodiment," "one embodiment," or "an alternative embodiment" mentioned twice or more in different locations in this specification do not necessarily refer to the same embodiment. In addition, certain features, structures, or characteristics in one or more embodiments of the application can be appropriately combined.

[0071] Similarly, it should be noted that, in order to simplify the description of the present application and thus aid in the understanding of one or more embodiments of the utility model, the foregoing description of the embodiments of the present application sometimes combines multiple features into a single embodiment, drawing, or description thereof. However, this disclosure method does not imply that the subject matter of the present application requires more features than those mentioned in the claims. In fact, the embodiments contain fewer features than all the features of the single embodiments disclosed above.

[0072] The above provides a detailed description of a pumped storage test system provided in the embodiments of this application. Specific examples have been used to illustrate the principle and implementation of this utility model. The description of the above embodiments is only for the purpose of helping to understand the method and core idea of ​​this utility model. At the same time, for those skilled in the art, there will be changes in the specific implementation and application scope based on the idea of ​​this utility model. Therefore, the content of this specification should not be construed as a limitation of this utility model.

Claims

1. A pumped storage test system, characterized in that, include: The drive motor and the AC excitation generator motor are connected in transmission. A motor control module is electrically connected to the power grid and to the drive motor to control whether the drive motor is connected to the power grid and started. The motor control module is connected to the power grid and electrically connected to the AC excitation generator motor to control the start of the AC excitation generator motor or to connect the output voltage of the AC excitation generator motor to the grid. The motor control module includes a rotor excitation unit and a stator grid-connected control unit. The input terminal of the rotor excitation unit is electrically connected to the power grid, and the output terminal of the rotor excitation unit is electrically connected to the rotor winding of the AC excitation generator motor to excite the rotor winding. The stator grid-connected control unit is electrically connected to the power grid, and the stator grid-connected control unit is electrically connected to the stator winding of the AC excitation generator motor, so as to energize the stator winding and start the AC excitation generator motor, or to connect the voltage output by the stator winding to the grid.

2. The pumped storage test system as described in claim 1, characterized in that, The rotor excitation unit includes a first circuit breaker, a voltage regulator, and a first converter; The first terminal of the first circuit breaker is electrically connected to the power grid, and the second terminal of the first circuit breaker is electrically connected to the input terminal of the voltage regulator. The output terminal of the voltage regulator is electrically connected to the input terminal of the first converter, and the output terminal of the first converter is electrically connected to the rotor winding of the AC excitation generator motor.

3. The pumped storage test system as described in claim 1, characterized in that, The stator grid-connected control unit includes a second circuit breaker; The first end of the second circuit breaker is electrically connected to the power grid, and the second end of the second circuit breaker is electrically connected to the stator winding of the AC excitation generator motor.

4. The pumped storage test system as described in claim 3, characterized in that, The stator grid-connected control unit also includes a first voltage transformer and a second voltage transformer; The first voltage transformer is electrically connected to the first terminal of the second circuit breaker, and the second voltage transformer is connected to the second terminal of the second circuit breaker.

5. The pumped storage test system as described in claim 3, characterized in that, The stator grid-connected control unit also includes a first current transformer and a second current transformer; The first current transformer is coupled to the first terminal of the second circuit breaker, and the second current transformer is coupled to the second terminal of the second circuit breaker.

6. The pumped storage test system as described in claim 1, characterized in that, The motor control module also includes a transformer unit; The first end of the transformer unit is electrically connected to the power grid, the second end of the transformer unit is electrically connected to the rotor excitation unit, and the second end of the transformer unit is electrically connected to the stator grid-connected control unit.

7. The pumped storage test system as described in claim 6, characterized in that, The transformer unit includes a third circuit breaker and a transformer; The first terminal of the third circuit breaker is electrically connected to the power grid, and the second terminal of the third circuit breaker is connected to the first terminal of the transformer. The second end of the transformer is electrically connected to the rotor excitation unit, and the second end of the transformer is electrically connected to the stator grid-connected control unit.

8. The pumped storage test system as described in claim 1, characterized in that, The motor control module includes a fourth circuit breaker; The first end of the fourth circuit breaker is electrically connected to the power grid, and the second end of the fourth circuit breaker is electrically connected to the drive motor.

9. The pumped storage test system as described in claim 8, characterized in that, The motor control module also includes a second converter; The input terminal of the second converter is electrically connected to the power grid, and the output terminal of the second converter is electrically connected to the first terminal of the fourth circuit breaker.

10. The pumped storage test system as described in claim 9, characterized in that, The motor control module also includes a fifth circuit breaker; The first terminal of the fifth circuit breaker is electrically connected to the power grid, and the second terminal of the fifth circuit breaker is connected to the input terminal of the second converter.

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