Wind turbine dynamic simulation system with energy storage and dynamic model-physical integrated wind turbine generator set

Abstract

The present invention discloses a wind turbine dynamic simulation system with energy storage and a dynamic-physical integrated wind turbine generator set. The wind turbine dynamic simulation system with energy storage of the present invention comprises an AC motor, a first AC-DC converter, a first DC-AC converter, a bidirectional DC-DC converter and an energy storage device. The AC motor is connected to the main shaft of the wind turbine by transmission. In addition, an implementation method comprising an AC motor, a first AC-DC converter, a bidirectional DC-DC converter and an energy storage device is provided. The present invention can realize the charge and discharge control of the energy storage device based on the control of the first AC-DC converter, the first DC-AC converter and the bidirectional DC-DC converter, and can realize the functions of smoothing wind power fluctuations, responding to wind power primary frequency modulation, etc., and has the function of simulating the compensation characteristics of a dynamic reactive compensation device and an active filter.

Description

Technical Field

[0001] The present invention relates to the technical field of electric power systems, and in particular to a wind turbine dynamic simulation system with energy storage and a dynamic model-physical integrated wind turbine generator set. Background Art

[0002] In order to achieve China's electricity carbon reduction, energy carbon reduction, and achieve the dual carbon goals, expanding the proportion of non-fossil energy represented by wind power and building a new power system with new energy as the main body has become the only way. However, the inherent power volatility and randomness of wind power and other new energy generation will also bring many adverse effects to the power grid, and in severe cases will even endanger the safe and stable operation of the power grid. In order to overcome the many adverse effects of wind power on the safe and stable operation of the power grid, the relevant control technologies of wind power (such as active power / reactive power control technology, primary frequency modulation control technology, active power change control technology, etc.) are also constantly being upgraded and transformed. In order to verify the correctness and reliability of wind power technology research results, a series of dynamic model verification work is generally required before actual application on site. Therefore, how to build a dynamic model verification platform that can effectively verify the research results of wind power technology has become a common concern of colleges and universities, research institutes and wind power control equipment manufacturers.

[0003] At present, the wind power simulation demonstration platform of many laboratories is generally constructed by using a wind turbine simulator + wind turbine power generation system. However, this method ignores the comparison with the actual wind turbine operation data, that is, whether the scientific research results verified on the wind power simulation demonstration platform are equally effective in the application of actual wind turbines with the same installed capacity needs further verification. Generally speaking, the success rate of scientific research results that can be verified on small and medium-sized wind turbines of the same type will be greatly improved when applied to large wind turbines of the same type. However, it is difficult for the existing wind power simulation demonstration platform to achieve this. Summary of the invention

[0004] Technical problem to be solved by the present invention: In view of the above-mentioned problems in the prior art, a dynamic simulation system of a wind turbine with energy storage and a dynamic model-physical integrated wind turbine generator set are provided. The present invention can realize the charging and discharging control of the energy storage device based on the control of the first AC-DC converter, the first DC-AC converter, and the bidirectional DC-DC converter, and can realize the functions of smoothing wind power fluctuations, responding to wind power primary frequency modulation, etc., and has the function of simulating the compensation characteristics of dynamic reactive compensation devices and active filters.

[0005] In order to solve the above technical problems, the technical solution adopted by the present invention is:

[0006] A wind turbine dynamic simulation system with energy storage comprises an AC motor, a first AC-DC converter, a first DC-AC converter, a bidirectional DC-DC converter and an energy storage device, wherein the AC motor is connected to the main shaft of the wind turbine in a driving manner, the AC motor is connected to the AC side of the first AC-DC converter, the DC sides of the first AC-DC converter and the first DC-AC converter are connected to each other, the AC side of the first DC-AC converter is also provided with an AC input terminal for connecting to an AC power source, and the energy storage device is connected in parallel with the DC side positive and negative busbars of the first AC-DC converter and the first DC-AC converter through the bidirectional DC-DC converter.

[0007] As a further improvement of the above technical solution:

[0008] A first capacitor is arranged in parallel between the DC-side positive and negative busbars of the first AC-DC converter and the first DC-AC converter.

[0009] A motor side contactor is connected in series between the AC motor and the AC side of the first AC-DC converter.

[0010] The AC input terminal of the first DC-AC converter is also connected in series with a grid-side reactor.

[0011] The AC input terminal of the first DC-AC converter is also connected in series with a grid-side contactor.

[0012] A wind turbine dynamic simulation system with energy storage comprises an AC motor, a first AC-DC converter, a bidirectional DC-DC converter and an energy storage device, wherein the AC motor is connected to the main shaft of the wind turbine through a transmission, and the energy storage device comprises two groups of DC ports, one group of DC ports of the energy storage device is connected to the AC motor through the first AC-DC converter, and the other group of DC ports of the energy storage device is connected to a group of DC ports of the bidirectional DC-DC converter, and the other group of DC ports on the bidirectional DC-DC converter serves as DC input terminals for connecting to a DC power supply.

[0013] As a further improvement of the above technical solution:

[0014] The two groups of DC ports of the energy storage device are both connected in parallel with a second capacitor.

[0015] A motor side contactor is connected in series between the AC motor and the AC side of the first AC-DC converter.

[0016] A DC power contactor is provided on a DC connection terminal of the bidirectional DC-DC converter connected to an external DC power supply.

[0017] In addition, this embodiment also provides a dynamic model-physical integrated wind turbine generator set, including a wind turbine, a direct-drive wind power generation system and the wind turbine dynamic simulation system with energy storage, the main shaft of the wind turbine is transmission-connected to the direct-drive wind power generation system, the direct-drive wind power generation system includes a permanent magnet generator, a generator-side contactor, a second AC-DC converter, a second DC capacitor, a second DC-AC converter, a busbar-side reactor, a busbar-side contactor and a second isolation transformer, the permanent magnet generator is transmission-connected to the main shaft of the wind turbine, and the output end of the permanent magnet generator is sequentially connected through the generator-side contactor The wind turbine dynamic simulation system with energy storage is connected to the second AC-DC converter, the second DC-AC converter, the busbar-side reactor, the busbar-side contactor and the second isolation transformer, the second DC capacitor is arranged in parallel between the DC side buses of the second AC-DC converter and the second DC-AC converter, the AC input terminal T of the wind turbine dynamic simulation system with energy storage is connected to the line between the second DC-AC converter and the second isolation transformer, or the DC input terminal T of the wind turbine dynamic simulation system with energy storage is connected to the DC positive and negative buses between the second AC-DC converter and the second DC-AC converter.

[0018] Compared with the prior art, the present invention mainly has the following advantages:

[0019] 1. The present invention can realize the charge and discharge control of the energy storage device based on the control of the first AC-DC converter, the first DC-AC converter, and the bidirectional DC-DC converter, and can realize the functions of smoothing wind power fluctuations, responding to wind power primary frequency modulation, etc., and has the function of simulating the compensation characteristics of the dynamic reactive power compensation device and the active filter.

[0020] 2. The present invention includes two topological structures provided based on the AC motor 1, the first AC-DC converter 2, the bidirectional DC-DC converter 4 and the energy storage device 5, which can realize AC or DC implementation as needed. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a structural schematic diagram of a wind turbine dynamic simulation system with energy storage according to an embodiment of the present invention.

[0022] Figure 2 It is a structural schematic diagram of a dynamic model-physical integrated wind turbine generator set in Embodiment 1 of the present invention.

[0023] Figure 3 It is a structural schematic diagram of a dynamic model-physical integrated wind turbine generator set in the second embodiment of the present invention.

[0024] Legend: 1. AC motor; 2. First AC-DC converter; 21. Motor-side contactor; 3. First DC-AC converter; 31. Grid-side reactor; 32. Grid-side contactor; 4. Bidirectional DC-DC converter; 41. DC power supply contactor; 5. Energy storage device; 6. First capacitor; 7. Second capacitor; 8. Wind turbine; 9. Direct-drive wind power generation system; 91. Permanent magnet generator; 92. Generator-side contactor; 93. Second AC-DC converter; 94. Second DC capacitor; 95. Second DC-AC converter; 96. Busbar-side reactor; 97. Busbar-side contactor; 98. Second isolation transformer. DETAILED DESCRIPTION

[0025] Embodiment 1:

[0026] like Figure 1 As shown, the wind turbine dynamic simulation system with energy storage in this embodiment includes an AC motor 1, a first AC-DC converter 2, a first DC-AC converter 3, a bidirectional DC-DC converter 4 and an energy storage device 5. The AC motor 1 is connected to the main shaft of the wind turbine, and the AC motor 1 is connected to the AC side of the first AC-DC converter 2. The DC sides of the first AC-DC converter 2 and the first DC-AC converter 3 are connected to each other. The AC side of the first DC-AC converter 3 is also provided with an AC input terminal for connecting to an AC power source. The energy storage device 5 is connected in parallel with the positive and negative busbars of the DC sides of the first AC-DC converter 2 and the first DC-AC converter 3 through the bidirectional DC-DC converter 4. Among them, the fully controlled switch devices of the first AC-DC converter 2 and the first DC-AC converter 3 are one of the insulated gate bipolar power tube IGBT, the electron injection enhanced gate transistor IEGT, the integrated gate commutated thyristor IGCT and the turn-off thyristor GTO. The fully controlled switch device of the bidirectional DC-DC converter 4 is one of an insulated gate bipolar power tube IGBT, an electron injection enhanced gate transistor IEGT, an integrated gate commutated thyristor IGCT and a turn-off thyristor GTO.

[0027] like Figure 1 As shown, in this embodiment, a first capacitor 6 is arranged in parallel between the DC side positive and negative busbars of the first AC-DC converter 2 and the first DC-AC converter 3. The first capacitor 6 can provide voltage support for the DC side busbars of the first AC-DC converter 2 and the first DC-AC converter 3.

[0028] like Figure 1As shown, in this embodiment, a motor side contactor 21 is connected in series between the AC motor 1 and the AC side of the first AC-DC converter 2. The motor side contactor 21 can realize the on-off control between the AC motor 1 and the AC side of the first AC-DC converter 2, so that it is safer and more reliable when the wind turbine dynamic simulation system is put into operation or cut off.

[0029] like Figure 1 As shown, in this embodiment, the AC input terminal of the first DC-AC converter 3 is further connected in series with a grid-side reactor 31 , and the four-quadrant operation of the AC side of the first DC-AC converter 3 can be achieved through the grid-side reactor 31 .

[0030] like Figure 1 As shown, in this embodiment, the AC input terminal of the first DC-AC converter 3 is also connected in series with a grid-side contactor 32, and the grid-side contactor 32 can realize the on-off control between the wind turbine dynamic simulation system with energy storage in this embodiment and the grid side, so that it is safer and more reliable when the wind turbine dynamic simulation system is put into operation or cut off.

[0031] The energy storage device 5 may be a supercapacitor, a lithium battery, or a storage battery as required.

[0032] like Figure 2As shown, this embodiment also provides a dynamic model-physical integrated wind turbine generator set, including a wind turbine 8, a direct-drive wind power generation system 9 and the aforementioned wind turbine dynamic simulation system with energy storage. The main shaft of the wind turbine 8 is connected to the direct-drive wind power generation system 9 by transmission. The direct-drive wind power generation system 9 includes a permanent magnet generator 91, a generator side contactor 92, a second AC-DC converter 93, a second DC capacitor 94, a second DC-AC converter 95, a busbar side reactor 96, a busbar side contactor 97 and a second isolation transformer 98. The permanent magnet generator 91 is connected to the main shaft of the wind turbine 8 by transmission. The output end of the permanent magnet generator 91 is sequentially connected to the generator side contactor 98 through the generator side contactor 99. 2. The second AC-DC converter 93, the second DC-AC converter 95, the busbar-side reactor 96, the busbar-side contactor 97 are connected to the second isolation transformer 98, the second DC capacitor 94 is arranged in parallel between the DC-side buses of the second AC-DC converter 93 and the second DC-AC converter 95, the AC input terminal T of the wind turbine dynamic simulation system with energy storage is connected to the line between the second DC-AC converter 95 and the second isolation transformer 98, or the DC input terminal T of the wind turbine dynamic simulation system with energy storage is connected to the DC positive and negative buses between the second AC-DC converter 93 and the second DC-AC converter 95. Among them, the fully controlled switch devices of the second AC-DC converter 93 and the second DC-AC converter 95 of the direct-drive wind power generation system 9 are one of the insulated gate bipolar power tube IGBT, the electron injection enhanced gate transistor IEGT, the integrated gate commutated thyristor IGCT and the turn-off thyristor GTO. The second DC capacitor 94 can provide voltage support for the DC side busbars of the second AC-DC converter 93 and the second DC-AC converter 95. Among them, the second AC-DC converter 93 and the second DC-AC converter 95 both have the function of embedding a developable control program. Through the embedding function of the developable control program, the innovative scientific research results such as the converter optimization control strategy can replace the relevant parts of the original traditional control strategy in the form of a dynamic connection library, etc. On the one hand, the dynamic model verification work of the new control strategy can be carried out in combination with the test scenario provided by the wind turbine simulation system. On the other hand, on the basis of the dynamic model verification, combined with the actual operation of the wind turbine, the operation verification work of the new control strategy can be carried out. It should be noted that the direct-drive wind power generation system 9 is a physical wind power generation system, and its specific implementation is not limited to Figure 2 A special case of the structure disclosed in .

[0033] The dynamic model-physical integrated wind turbine generator set of this embodiment is mainly used for the construction of a wind power technology scientific research achievement verification platform. The wind turbine dynamic simulation system with energy storage in this embodiment can dynamically simulate various operating conditions of the wind turbine generator set, and can realize the charging and discharging control of the energy storage device based on the control of the first AC-DC converter, the first DC-AC converter, and the bidirectional DC-DC converter. It can realize the functions of smoothing wind power fluctuations and responding to wind power primary frequency modulation, and has the function of simulating the compensation characteristics of dynamic reactive power compensation devices and active filters; the second AC-DC converter 93 and the second DC-AC converter 95 of the direct-drive wind power generation system 9 have the function of embedding a developable control program. The two are organically combined. On the one hand, they can effectively carry out the verification work of scientific research results in the dynamic model wind power generation system, and on the other hand, they can also provide a good dynamic model verification and physical verification platform for wind power technology scientific research results, and further carry out the operation verification work of scientific research results in the physical wind power generation system.

[0034] The application method of the dynamic model-physical integrated wind turbine generator set of this embodiment includes:

[0035] 1. By default, the direct-drive wind power generation system 9 is in the physical wind power generation system operation mode (in the power generation state). When it is necessary to perform a wind turbine dynamic simulation using the wind turbine dynamic simulation system with energy storage of this embodiment, jump to the next step;

[0036] 2. Exit the physical wind power generation system operation mode (i.e., control the wind turbine blades to fully retract, but the wind turbine generator and other parts such as the energy conversion system remain in operation), start the wind turbine dynamic simulation system with energy storage of this embodiment, and effectively control the rotor speed of the AC motor 1 by controlling the AC side current of the first AC-DC converter 2 of the wind turbine dynamic simulation system with energy storage of this embodiment (i.e., the stator current of the AC motor), so as to achieve the purpose of simulating the wind turbine operation characteristics. Through the first DC-AC converter 3, the bidirectional DC-DC converter 4 and the energy storage device 5 of the wind turbine dynamic simulation system with energy storage of this embodiment, the functions of smoothing wind power fluctuations and responding to wind power primary frequency modulation can be realized. At the same time, it also has the function of simulating the compensation characteristics of the dynamic reactive power compensation device and the active filter, and provides the operating conditions required for the verification of scientific research results according to the test requirements, and carries out the dynamic model verification work of scientific research results. After the dynamic simulation of the wind turbine is completed, jump to the next step;

[0037] 3. Exit the wind turbine dynamic simulation system with energy storage of this embodiment, start the direct-drive wind power generation system 9 and enter the real wind power generation system operation mode (control the blades of the wind turbine 8 to fully release the blades). At this time, not only can power be generated, but also the operation verification of scientific research results on the real wind power generation system (direct-drive wind power generation system 9) can be carried out.

[0038] Embodiment 2:

[0039] This embodiment has the same basic principle as the first embodiment, but is implemented in a different way. Comparative Document 1 uses AC input, while this embodiment uses DC input.

[0040] See also Figure 3 The wind turbine dynamic simulation system with energy storage of this embodiment includes an AC motor 1, a first AC-DC converter 2, a bidirectional DC-DC converter 4 and an energy storage device 5. The AC motor 1 is connected to the main shaft of the wind turbine through a transmission. The energy storage device 5 includes two groups of DC ports. One group of DC ports of the energy storage device 5 is connected to the AC motor 1 through the first AC-DC converter 2, and the other group of DC ports of the energy storage device 5 is connected to a group of DC ports of the bidirectional DC-DC converter 4. The other group of DC ports on the bidirectional DC-DC converter 4 serves as DC input terminals for connecting to a DC power supply.

[0041] See also Figure 2 In this embodiment, the two groups of DC ports of the energy storage device 5 are connected in parallel with the second capacitor 7, and the second capacitor 7 can provide voltage support for the two groups of DC ports of the energy storage device 5.

[0042] See also Figure 2 In this embodiment, a motor side contactor 21 is connected in series between the AC motor 1 and the AC side of the first AC-DC converter 2. The motor side contactor 21 can realize the on-off control between the AC motor 1 and the AC side of the first AC-DC converter 2, so that it is safer and more reliable when the wind turbine dynamic simulation system is put into operation or cut off.

[0043] See also Figure 2 In this embodiment, a DC power contactor 41 is provided on the DC connection terminal of the bidirectional DC-DC converter 4 connected to the external DC power supply. The on-off control between the wind turbine dynamic simulation system with energy storage in this embodiment and the DC grid side can be realized through the grid-side contactor 32, so that the wind turbine dynamic simulation system is safer and more reliable when it is put into operation or cut off.

[0044] The application method of the dynamic model-physical integrated wind turbine generator set of this embodiment includes:

[0045] 1. By default, the direct-drive wind power generation system 9 is in the physical wind power generation system operation mode (in the power generation state). When it is necessary to perform a wind turbine dynamic simulation using the wind turbine dynamic simulation system with energy storage of this embodiment, jump to the next step;

[0046] 2. Exit the physical wind power generation system operation mode (i.e., control the wind turbine blades to fully retract, but the wind turbine generator and other parts such as the energy conversion system remain in operation), start the wind turbine dynamic simulation system with energy storage of this embodiment, and effectively control the rotor speed of the AC motor 1 by controlling the AC side current of the first AC-DC converter 2 of the wind turbine dynamic simulation system with energy storage of this embodiment (i.e., the stator current of the AC motor), so as to achieve the purpose of simulating the wind turbine operation characteristics. The bidirectional DC-DC converter 4 and the energy storage device 5 of the wind turbine dynamic simulation system with energy storage of this embodiment can realize the functions of smoothing wind power fluctuations and responding to wind power primary frequency modulation. At the same time, it also has the function of simulating the compensation characteristics of dynamic reactive compensation devices and active filters, and provides the operating conditions required for the verification of scientific research results according to the test requirements, and carries out dynamic model verification of scientific research results. After the dynamic simulation of the wind turbine is completed, jump to the next step;

[0047] 3. Exit the wind turbine dynamic simulation system with energy storage of this embodiment, start the direct-drive wind power generation system 9 and enter the real wind power generation system operation mode (control the blades of the wind turbine 8 to fully release the blades). At this time, not only can power be generated, but also the operation verification of scientific research results on the real wind power generation system (direct-drive wind power generation system 9) can be carried out.

[0048] The above is only a preferred embodiment of the present invention, and the protection scope of the present invention is not limited to the above embodiments. All technical solutions under the concept of the present invention belong to the protection scope of the present invention. It should be pointed out that for ordinary technicians in this technical field, some improvements and modifications without departing from the principle of the present invention should also be regarded as the protection scope of the present invention.

Claims

1. A dynamic model-physical integrated wind turbine generator set, characterized in that: The invention comprises a wind turbine (8), a direct-drive wind power generation system (9), and a wind turbine dynamic simulation system with energy storage, wherein the main shaft of the wind turbine (8) is transmission-connected to the direct-drive wind power generation system (9), and the direct-drive wind power generation system (9) comprises a permanent magnet generator (91), a generator-side contactor (92), a second AC-DC converter (93), a second DC capacitor (94), a second DC-AC converter (95), a busbar-side reactor (96), a busbar-side contactor (97), and a second isolator (98). The permanent magnet generator (91) is connected to the main shaft of the wind turbine (8) through a transmission, and the output end of the permanent magnet generator (91) is connected to the second isolation transformer (98) in sequence through a generator side contactor (92), a second AC-DC converter (93), a second DC-AC converter (95), a busbar side reactor (96), a busbar side contactor (97), and the second isolation transformer (98). The second DC capacitor (94) is arranged in parallel with the second AC-DC converter (93), the second DC-AC The AC input terminal T of the wind turbine dynamic simulation system with energy storage is connected to the line between the second DC-AC converter (95) and the second isolation transformer (98); the wind turbine dynamic simulation system with energy storage comprises an AC motor (1), a first AC-DC converter (2), a first DC-AC converter (3), a bidirectional DC-DC converter (4) and an energy storage device (5); the AC motor (1) is connected to the main shaft of the wind turbine through a transmission system; The AC motor (1) is connected to the AC side of a first AC-DC converter (2); the DC sides of the first AC-DC converter (2) and the first DC-AC converter (3) are connected to each other; the AC side of the first DC-AC converter (3) is also provided with an AC input terminal for connecting to an AC power source; and the energy storage device (5) is connected in parallel with the positive and negative busbars of the DC sides of the first AC-DC converter (2) and the first DC-AC converter (3) via a bidirectional DC-DC converter (4); The application method of the dynamic model-physical integrated wind turbine generator set includes: 1) By default, the direct-drive wind power generation system (9) is in a physical wind power generation system operation mode, wherein the physical wind power generation system operation mode refers to being in a power generation state, and when it is necessary to perform a wind turbine dynamic simulation using the wind turbine dynamic simulation system with energy storage, jump to the next step; 2) The wind turbine blades are controlled to be fully retracted, but the wind turbine generator and the energy conversion system are still kept in operation to exit the physical wind power generation system operation mode, and the wind turbine dynamic simulation system with energy storage is started. The rotor speed of the AC motor (1) is controlled by the AC side current of the first AC-DC converter (2) of the wind turbine dynamic simulation system with energy storage to achieve the purpose of simulating the wind turbine operation characteristics. The wind turbine dynamic simulation system with energy storage is used to smooth wind power fluctuations, respond to wind power primary frequency modulation functions, and simulate the compensation characteristics of dynamic reactive power compensation devices or active filters. According to the test requirements, the operating conditions required for the verification of scientific research results are provided to carry out dynamic model verification of scientific research results. After the wind turbine dynamic simulation is completed, jump to the next step; 3) exiting the dynamic simulation system of the wind turbine with energy storage, controlling the blades of the wind turbine (8) to fully extend the blades, starting the direct-drive wind power generation system (9) to enter the actual wind power generation system operation mode, controlling the blades of the wind turbine (8) to fully extend the blades in the actual wind power generation system operation mode, and conducting operation verification work of the scientific research results on the actual wind power generation system composed of the direct-drive wind power generation system (9) while generating electricity.

2. The dynamic model-physical integrated wind turbine generator set according to claim 1 is characterized in that: A first capacitor (6) is arranged in parallel between the positive and negative busbars on the DC sides of the first AC-DC converter (2) and the first DC-AC converter (3).

3. The dynamic model-physical integrated wind turbine generator set according to claim 2 is characterized in that: A motor-side contactor (21) is connected in series between the AC motor (1) and the AC side of the first AC-DC converter (2).

4. The dynamic model-physical integrated wind turbine generator set according to claim 3 is characterized in that: The AC input terminal of the first DC-AC converter (3) is also connected in series with a grid-side reactor (31).

5. The dynamic model-physical integrated wind turbine generator set according to claim 4 is characterized in that: The AC input terminal of the first DC-AC converter (3) is also connected in series with a grid-side contactor (32).

6. A dynamic model-physical integrated wind turbine generator set, characterized in that: The invention comprises a wind turbine (8), a direct-drive wind power generation system (9), and a wind turbine dynamic simulation system with energy storage, wherein the main shaft of the wind turbine (8) is connected to the direct-drive wind power generation system (9) by transmission, and the direct-drive wind power generation system (9) comprises a permanent magnet generator (91), a generator-side contactor (92), a second AC-DC converter (93), a second DC capacitor (94), a second DC-AC converter (95), a bus-side reactor (96), a bus-side contactor (97), and a second isolation transformer (98), wherein the permanent magnet generator (91) is connected to the main shaft of the wind turbine (8) by transmission, and the output end of the permanent magnet generator (91) is connected in sequence through the generator-side contactor (92), the second AC-DC converter (93), the second DC-AC converter (95), the bus-side reactor (96), the bus-side contactor (97), and the second isolation transformer (98), and the second DC capacitor (94) is arranged in parallel with the second DC converter (95). The DC input terminal T of the wind turbine dynamic simulation system with energy storage is connected to the DC positive and negative bus bars between the second AC-DC converter (93) and the second DC-AC converter (95); the wind turbine dynamic simulation system with energy storage comprises an AC motor (1), a first AC-DC converter (2), a bidirectional DC-DC converter (4) and an energy storage device (5); the AC motor (1) is connected to the main shaft of the wind turbine through a transmission; the energy storage device (5) comprises two groups of DC ports; one group of DC ports of the energy storage device (5) is connected to the AC motor (1) through the first AC-DC converter (2); the other group of DC ports of the energy storage device (5) is connected to a group of DC ports of the bidirectional DC-DC converter (4); the other group of DC ports on the bidirectional DC-DC converter (4) serves as a DC input terminal for connecting to a DC power source; The application method of the dynamic model-physical integrated wind turbine generator set includes: 1) By default, the direct-drive wind power generation system (9) is in a physical wind power generation system operation mode, wherein the physical wind power generation system operation mode refers to being in a power generation state, and when it is necessary to perform a wind turbine dynamic simulation using the wind turbine dynamic simulation system with energy storage, jump to the next step; 2) The wind turbine blades are controlled to be fully retracted, but the wind turbine generator and the energy conversion system are still kept in operation to exit the physical wind power generation system operation mode, and the wind turbine dynamic simulation system with energy storage is started. The rotor speed of the AC motor (1) is controlled by the AC side current of the first AC-DC converter (2) of the wind turbine dynamic simulation system with energy storage to achieve the purpose of simulating the wind turbine operation characteristics. The bidirectional DC-DC converter (4) and the energy storage device (5) of the wind turbine dynamic simulation system with energy storage are used to smooth the wind power fluctuation, respond to the wind power primary frequency modulation function, and simulate the compensation characteristics of the dynamic reactive power compensation device or the active filter. According to the test requirements, the operating conditions required for the verification of scientific research results are provided to carry out the dynamic model verification work of the scientific research results; after the wind turbine dynamic simulation is completed, jump to the next step; 3) exiting the wind turbine dynamic simulation system with energy storage, starting the direct-drive wind power generation system (9) and entering the physical wind power generation system operation mode, wherein the blades of the wind turbine (8) are controlled to be fully lowered in the physical wind power generation system operation mode, and while generating electricity, the operation verification of the scientific research results on the physical wind power generation system composed of the direct-drive wind power generation system (9) is carried out.

7. The dynamic model-physical integrated wind turbine generator set according to claim 6, characterized in that: The two groups of DC ports of the energy storage device (5) are both connected in parallel with a second capacitor (7).

8. The dynamic model-physical integrated wind turbine generator set according to claim 7, characterized in that: A motor-side contactor (21) is connected in series between the AC motor (1) and the AC side of the first AC-DC converter (2).

9. The dynamic model-physical integrated wind turbine generator set according to claim 8, characterized in that: A DC power supply contactor (41) is provided on a DC connection terminal of the bidirectional DC-DC converter (4) connected to an external DC power supply.

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