Compensation device dynamic simulation system and dynamic model-physical integrated wind turbine generator set

Abstract

The present invention discloses a compensation device dynamic simulation system and a dynamic-model-physical integrated wind turbine generator set. The compensation device dynamic simulation system of the present invention includes a compensating AC-DC converter and a compensating bidirectional DC-DC converter for providing compensation energy to the AC-DC converter. The AC side of the compensating AC-DC converter is provided with an AC output terminal for connecting to a direct-drive wind power generation system. The DC side of the compensating AC-DC converter is interconnected with one DC side of the compensating bidirectional DC-DC converter. The other DC side of the compensating bidirectional DC-DC converter is provided with a DC input terminal for connecting to an external DC power supply. The present invention can provide a dynamic simulation of the compensation device for a wind power model verification platform, and can be conveniently used to simulate and verify real working conditions, thereby improving the reliability and comprehensiveness of the verification of effective scientific research results on the wind power model verification platform.

Description

Technical Field

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

[0002] Increasing the proportion of non-fossil energy sources, particularly wind power, and building a new power system dominated by renewable energy sources are essential. However, the inherent power fluctuations and randomness of renewable energy sources like wind power can negatively impact the power grid, and in severe cases, even jeopardize its safe and stable operation. To mitigate these negative impacts of wind power on the safe and stable operation of the grid, wind power control technologies (such as active / reactive power control, primary frequency regulation, and active power variation control) are undergoing continuous upgrades. To validate the accuracy and reliability of wind power technology research results, a series of dynamic modeling experiments are generally required before field application. Therefore, establishing a dynamic modeling platform that can effectively validate wind power technology research results has become a common concern among universities, research institutes, and wind power control equipment manufacturers.

[0003] Currently, many laboratories' wind turbine simulation verification platforms are generally constructed using a wind turbine simulator + wind turbine power generation system. However, this approach neglects benchmarking against actual wind turbine operating data. Specifically, whether research results validated on a wind turbine simulation verification platform are equally effective when applied to actual wind turbines of the same installed capacity remains to be further verified. Generally speaking, research results that can be successfully applied to similar small and medium-sized wind turbines will have a significantly higher success rate when applied to similar large wind turbines. However, existing wind turbine simulation verification platforms struggle to achieve this. Furthermore, many laboratories' wind turbine simulation verification platforms often overlook the implementation of power compensation devices in wind turbines. This results in a lack of compensation-based verification when validating research results on wind turbine simulation verification platforms, making it difficult to simulate and verify real-world operating conditions. This impacts the reliability and comprehensiveness of the research results validated on wind turbine simulation verification platforms. Summary of the Invention

[0004] The technical problem to be solved by the present invention is as follows: In view of the above-mentioned problems of the prior art, a dynamic simulation system for a compensation device and a dynamic model-physical integrated wind turbine generator set are provided. The present invention can provide dynamic simulation of a compensation device for a wind power model verification platform, which can be conveniently used to realize simulation and verification of real working conditions, thereby improving the reliability and comprehensiveness of verification of effective scientific research results on the wind power model verification platform.

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

[0006] A dynamic model-physical integrated wind turbine generator set, comprising a wind turbine, a direct-drive wind power generation system, and a wind turbine dynamic simulation system. The dynamic model-physical integrated wind turbine generator set also includes a compensation device dynamic simulation system. The direct-drive wind power generation system includes a permanent magnet generator, a generator side contactor, a first AC-DC converter, a first DC capacitor, a first DC-AC converter, a busbar side reactor, a busbar side contactor, and a first isolation transformer. The permanent magnet generator is connected to the main shaft of the wind turbine through a transmission. The output end of the permanent magnet generator is sequentially connected to the generator side contactor. The first AC-DC converter, the first DC-AC converter, the busbar-side reactor, the busbar-side contactor and the first isolation transformer are connected; the first DC capacitor is arranged in parallel between the DC-side buses of the first AC-DC converter and the first DC-AC converter; the AC output terminal T of the compensation device dynamic simulation system is connected between the busbar-side reactor and the busbar-side contactor; the compensation device dynamic simulation system includes a compensation AC-DC converter and a compensation bidirectional DC-DC converter for providing compensation energy for the AC-DC converter. The AC side of the compensation AC-DC converter is provided with an AC output terminal for connecting to a direct-drive wind power generation system, the DC side of the compensation AC-DC converter is interconnected with one DC side of the compensation bidirectional DC-DC converter, and the other DC side of the compensation bidirectional DC-DC converter is provided with a DC input terminal; the wind turbine dynamic simulation system includes an AC motor, a motor side contactor, a second AC-DC converter, a second DC capacitor, a second DC-AC converter, a mains side reactor, a mains side contactor and a second isolation transformer, the AC motor and The main shaft of the wind turbine is connected by a transmission, one side of the second isolation transformer is connected to the mains, and the other side is connected to the AC motor through a mains-side contactor, a mains-side reactor, a second DC-AC converter, a second AC-DC converter, and a motor-side contactor in sequence; the second DC capacitor is arranged in parallel between the DC-side positive and negative busbars of the second AC-DC converter and the second DC-AC converter; the DC-side positive and negative busbars of the second AC-DC converter and the second DC-AC converter are connected in parallel to the DC input terminals of the compensating bidirectional DC-DC converter;

[0007] When it is necessary to verify the target wind turbine strategy, the wind turbine is controlled to fully retract the blades, and the wind turbine dynamic simulation system is controlled to dynamically simulate the wind turbine to drive the direct-drive wind power generation system running the target wind turbine strategy to obtain the test results of the direct-drive wind power generation system running the target wind turbine strategy under different working conditions; after completion, it is necessary to exit the wind turbine dynamic simulation system; when power generation operations are required, the wind turbine is controlled to release the blades, and by default, only the direct-drive wind power generation system is driven by the wind turbine to generate electricity, and only when the wind speed exceeds the set value is the wind turbine dynamic simulation system controlled to switch to the power generation mode, and the direct-drive wind power generation system and the wind turbine dynamic simulation system are driven by the wind turbine at the same time to generate electricity, and the wind turbine is controlled to release the blades to control the release state as needed until the blades are fully released, so as to carry out the operation verification of scientific research results in the direct-drive wind power generation system and actual power generation.

[0008] Optionally, a wind power generation system-side reactor is connected in series between the AC side and the AC output terminal of the compensation AC-DC converter.

[0009] Optionally, a compensation capacitor is connected in parallel between the DC side of the compensating AC-DC converter and the positive and negative busbars of the DC side of the compensating bidirectional DC-DC converter.

[0010] Optionally, the fully controlled switching devices of the compensation AC-DC converter and the compensation bidirectional DC-DC converter are 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.

[0011] In addition, the present invention also provides a dynamic model-physical integrated wind turbine generator set, including a wind turbine, a direct-drive wind power generation system, and a wind turbine dynamic simulation system. The dynamic model-physical integrated wind turbine generator set also includes a compensation device dynamic simulation system. The direct-drive wind power generation system includes a permanent magnet generator, a generator side contactor, a first AC-DC converter, a first DC capacitor, a first DC-AC converter, a busbar side reactor, a busbar side contactor, and a first isolation transformer. The permanent magnet generator is connected to the main shaft of the wind turbine. The output end of the permanent magnet generator is connected in sequence through the generator side contactor, the first AC-DC converter, the first DC-AC converter, the busbar side reactor, the busbar side contactor and the first isolation transformer. The first DC capacitor is arranged in parallel between the DC side buses of the first AC-DC converter and the first DC-AC converter. The AC output terminal T of the dynamic simulation system of the compensation device is connected between the busbar side reactor and the busbar side contactor. The dynamic simulation system of the compensation device includes a compensation AC-DC converter. The wind turbine dynamic simulation system comprises an AC motor, a motor-side contactor, a second AC-DC converter, a second DC capacitor, a second DC-AC converter, a mains-side reactor, a mains-side contactor, and a second isolation device. The AC motor is connected to the main shaft of the wind turbine through a transmission system. One side of the second isolation transformer is connected to the mains, and the other side is connected to the AC motor through a mains side contactor, a mains side reactor, a second DC-AC converter, a second AC-DC converter, and a motor side contactor in sequence. The second DC capacitor is arranged in parallel between the DC side positive and negative busbars of the second AC-DC converter and the second DC-AC converter. The AC side T of the compensating DC-AC converter is connected between the mains side reactor and the mains side contactor.

[0012] When it is necessary to verify the target wind turbine strategy, the wind turbine is controlled to fully retract the blades, and the wind turbine dynamic simulation system is controlled to dynamically simulate the wind turbine to drive the direct-drive wind power generation system running the target wind turbine strategy to obtain the test results of the direct-drive wind power generation system running the target wind turbine strategy under different working conditions; after completion, it is necessary to exit the wind turbine dynamic simulation system; when power generation operations are required, the wind turbine is controlled to release the blades, and by default, only the direct-drive wind power generation system is driven by the wind turbine to generate electricity, and only when the wind speed exceeds the set value is the wind turbine dynamic simulation system controlled to switch to the power generation mode, and the direct-drive wind power generation system and the wind turbine dynamic simulation system are driven by the wind turbine at the same time to generate electricity, and the wind turbine is controlled to release the blades to control the release state as needed until the blades are fully released, so as to carry out the operation verification of scientific research results in the direct-drive wind power generation system and actual power generation.

[0013] Optionally, a wind power generation system side reactor is connected in series between the AC side and the AC output terminal of the compensating AC-DC converter, and an input side reactor is connected in series between the AC side and the AC output terminal of the compensating DC-AC converter.

[0014] Optionally, a compensation capacitor is connected in parallel between the DC side of the compensation AC-DC converter and the positive and negative busbars of the DC side of the compensation DC-AC converter.

[0015] Optionally, the fully controlled switching devices of the AC-DC converter and the compensating DC-AC converter are 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.

[0016] Compared with the prior art, the present invention has the following advantages:

[0017] 1. The compensation device dynamic simulation system of the present invention includes a compensation AC-DC converter and a compensation bidirectional DC-DC converter / compensation DC-AC converter for providing compensation energy to the AC-DC converter. The AC side of the compensation AC-DC converter is provided with an AC output terminal for connecting to a direct-drive wind power generation system. The DC side of the compensation AC-DC converter is interconnected with one DC side of the compensation bidirectional DC-DC converter. The other DC side of the compensation bidirectional DC-DC converter is provided with a DC input terminal for connecting to an external DC power source, or the AC side of the compensation DC-AC converter is provided with an AC input terminal for connecting to an external AC power source. The present invention can provide compensation device dynamic simulation for a wind power model verification platform, can be conveniently used to simulate and verify real operating conditions, and improve the reliability and comprehensiveness of the verification of effective scientific research results on the wind power model verification platform.

[0018] 2. The compensation device dynamic simulation system of the present invention can be used to simulate the compensation characteristic functions of the dynamic simulation energy storage device, dynamic reactive compensation device and active filter of the wind turbine generator set, and has the advantage of a wide range of applications. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 Schematic diagram of the dynamic simulation system of the compensation device and its application environment in Example 1 of the present invention.

[0020] Figure 2 Schematic diagram of the dynamic simulation system of the compensation device and its application environment in the second embodiment of the present invention.

[0021] Legend: 1. AC-DC converter; 2. Compensated bidirectional DC-DC converter; 21. Compensated DC-AC converter; 3. Reactor on the wind power generation system side; 4. Compensating capacitor; 5. Wind turbine; 6. Direct-drive wind power generation system; 61. Permanent magnet generator; 62. Contactor on the generator side; 63. First AC-DC converter; 64. First DC capacitor; 65. First DC-AC converter; 66. Reactor on the busbar side; 67. Contactor on the busbar side; 68. First isolation transformer; 7. Wind turbine dynamic simulation system; 71. AC motor; 72. Contactor on the motor side; 73. Second AC-DC converter; 74. Second DC capacitor; 75. Second DC-AC converter; 76. Reactor on the mains side; 77. Contactor on the mains side; 78. Second isolation transformer. DETAILED DESCRIPTION

[0022] Example 1:

[0023] See also Figure 1 The compensation device dynamic simulation system of this embodiment includes a compensating AC-DC converter 1 and a compensating bidirectional DC-DC converter 2 for providing compensation energy to the AC-DC converter 1. The AC side of the compensating AC-DC converter 1 is provided with AC output terminals for connecting to a direct-drive wind power generation system. The DC side of the compensating AC-DC converter 1 is interconnected with one DC side of the compensating bidirectional DC-DC converter 2. The other DC side of the compensating bidirectional DC-DC converter 2 is provided with DC input terminals for connecting to an external DC power supply. Through dual control of the compensating bidirectional DC-DC converter 2 and the compensating AC-DC converter 1, the compensation device dynamic simulation system of this embodiment can provide dynamic simulation of the compensation device for a wind power model verification platform. This system can be conveniently used to simulate and verify real-world operating conditions, improving the reliability and comprehensiveness of scientific research results verified on the wind power model verification platform. It can also be used to simulate the compensation characteristics and functions of a wind turbine's dynamic energy storage device, dynamic reactive power compensation device, and active power filter.

[0024] See also Figure 1 In this embodiment, a wind power generation system side reactor 3 is connected in series between the AC side and the AC output terminal of the compensation AC-DC converter 1. The wind power generation system side reactor 3 can realize four-quadrant operation of the AC side of the compensation AC-DC converter 1.

[0025] See also Figure 1 In this embodiment, a compensation capacitor 4 is connected in parallel between the DC side of the compensation AC-DC converter 1 and the positive and negative busbars on the DC side of the compensation bidirectional DC-DC converter 2. The compensation capacitor 4 can provide voltage support for the positive and negative busbars on the DC side of the compensation AC-DC converter 1 and the DC side of the compensation bidirectional DC-DC converter 2.

[0026] In this embodiment, the fully controlled switching devices of the compensation AC-DC converter 1 and the compensation bidirectional DC-DC converter 2 are 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] In addition, if Figure 1 As shown, this embodiment also provides a dynamic model-physical integrated wind turbine generator set, comprising a wind turbine 5, a direct-drive wind power generation system 6, and a wind turbine dynamic simulation system 7. The dynamic model-physical integrated wind turbine generator set also includes the aforementioned compensation device dynamic simulation system. In this embodiment, the output end of the direct-drive wind power generation system 6 is connected to the laboratory busbar, which can be used to detect the actual output electrical parameters of the direct-drive wind power generation system 6. The wind turbine dynamic simulation system 7 is directly connected to the mains power supply. On the one hand, it can be used to use the mains power as a power source to drive the wind turbine dynamic simulation system 7 to realize wind turbine dynamic simulation. On the other hand, the wind turbine dynamic simulation system 7 can be switched to power generation mode to realize grid-connected power generation.

[0028] like Figure 1As shown, the direct-drive wind power generation system 6 includes a permanent magnet generator 61, a generator-side contactor 62, a first AC-DC converter 63, a first DC capacitor 64, a first DC-AC converter 65, a busbar-side reactor 66, a busbar-side contactor 67, and a first isolation transformer 68. The permanent magnet generator 61 is connected to the main shaft of the wind turbine 5 through a transmission system. The output end of the permanent magnet generator 61 is connected in sequence through the generator-side contactor 62, the first AC-DC converter 63, the first DC-AC converter 65, the busbar-side reactor 66, the busbar-side contactor 67, and the first isolation transformer 68. The first DC capacitor 64 is arranged in parallel between the DC-side buses of the first AC-DC converter 63 and the first DC-AC converter 65. The AC output terminal T of the dynamic simulation system of the compensation device is connected between the busbar-side reactor 66 and the busbar-side contactor 67. Among them, the first AC-DC converter 63 and the first DC-AC converter 65 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 be used to replace the relevant parts of the original traditional control strategy in the form of a dynamic link library. 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, the operation verification work of the new control strategy can be carried out in combination with the actual operation of the wind turbine. It should be noted that the direct-drive wind power generation system 6 is a physical wind power generation system, and its specific implementation is not limited to Figure 1 A special case of the structure disclosed in .

[0029] like Figure 1As shown, the wind turbine dynamic simulation system 7 includes an AC motor 71, a motor-side contactor 72, a second AC-DC converter 73, a second DC capacitor 74, a second DC-AC converter 75, a mains-side reactor 76, a mains-side contactor 77, and a second isolation transformer 78. The AC motor 71 is connected to the main shaft of the wind turbine 5 through a transmission. One side of the second isolation transformer 78 is connected to the mains, and the other side is connected to the AC motor 71 through the mains-side contactor 77, the mains-side reactor 76, the second DC-AC converter 75, the second AC-DC converter 73, and the motor-side contactor 72 in sequence. The second DC capacitor 74 is arranged in parallel between the DC-side positive and negative busbars of the second AC-DC converter 73 and the second DC-AC converter 75. The DC-side positive and negative busbars of the second AC-DC converter 73 and the second DC-AC converter 75 are connected in parallel to the DC input terminals of the compensating bidirectional DC-DC converter 2. The second DC capacitor 74 provides voltage support for the DC-side positive and negative busbars of both the second AC-DC converter 73 and the second DC-AC converter 75. The motor-side contactor 72 enables on / off control between the AC motor 71 and the AC side of the second AC-DC converter 73, thereby ensuring greater safety and reliability when the wind turbine dynamic simulation system 7 is activated or deactivated. The mains-side contactor 77 enables on / off control between the AC side of the second DC-AC converter 75 and the second isolation transformer 78, thereby ensuring greater safety and reliability when the wind turbine dynamic simulation system 7 is activated or deactivated. The mains-side reactor 76 is connected in series between the AC side of the second DC-AC converter 75 and the mains-side contactor 77, enabling four-quadrant operation of the AC side of the first DC-AC converter 33.

[0030] When verifying the target wind turbine strategy, wind turbine 5 is controlled to fully retract its blades. Wind turbine dynamic simulation system 7 is then controlled to dynamically simulate wind turbine 5 driving direct-drive wind power generation system 6 operating according to the target wind turbine strategy, thereby obtaining test results for direct-drive wind power generation system 6 operating according to the target wind turbine strategy under different operating conditions. Controlling wind turbine 5 to fully retract its blades exits the physical wind power generation system operation mode. At this point, permanent magnet generator 61 and other components of the energy conversion system (second AC-DC converter 23, second DC-AC converter 25) remain operational. Wind turbine dynamic simulation system 7 is activated. By controlling the AC side current of first AC-DC converter 32 of wind turbine dynamic simulation system 7 (i.e., the stator current of the AC motor), the rotor speed of AC motor 71 is effectively controlled, simulating the wind turbine's operating characteristics. This provides the operating conditions required for verifying scientific research results according to test requirements, allowing for dynamic modeling verification of scientific research results. Upon completion, wind turbine dynamic simulation system 7 is exited. Furthermore, when power generation is required, wind turbine 5 is controlled to lower its blades. By default, wind turbine 5 drives only direct-drive wind power generation system 6 for power generation. Only when the wind speed exceeds a set value does wind turbine dynamic simulation system 7 switch to power generation mode, allowing wind turbine 5 to simultaneously drive both direct-drive wind power generation system 6 and wind turbine dynamic simulation system 7 for power generation. Controlling wind turbine 5 to lower its blades allows the blades to be fully lowered as needed, thereby enabling operational verification of scientific research results in a physical wind power generation system (direct-drive wind power generation system 6) and actual power generation. Since wind turbine dynamic simulation system 7 switches to power generation mode when wind speed exceeds a set value, allowing wind turbine 5 to simultaneously drive both direct-drive wind power generation system 6 and wind turbine dynamic simulation system 7 for power generation, the power generation capacity of the integrated dynamic-physical model small and medium-sized direct-drive wind turbine generator set is improved.

[0031] Example 2:

[0032] The principle of this embodiment is basically the same as that of the first embodiment, and the main difference is that the structure of the compensation AC-DC converter 1 providing compensation energy is different. Figure 2 As shown, the compensation device dynamic simulation system of this embodiment includes a compensation AC-DC converter 1 and a compensation DC-AC converter 21 for providing compensation energy to the compensation AC-DC converter 1. The AC side of the compensation AC-DC converter 1 is provided with an AC output terminal for connecting to a direct-drive wind power generation system. The DC side of the compensation AC-DC converter 1 is interconnected with the DC side of the compensation DC-AC converter 21. The AC side of the compensation DC-AC converter 21 is provided with an AC input terminal for connecting to an external AC power source. Figure 2 In this embodiment, the AC side T of the compensation DC-AC converter 21 is connected between the mains side reactor 76 and the mains side contactor 77 .

[0033] like Figure 2 As shown, in this embodiment, a wind power generation system-side reactor 3 is connected in series between the AC side and the AC output terminal of the compensating AC-DC converter 1. The wind power generation system-side reactor 3 can realize four-quadrant operation of the AC side of the compensating AC-DC converter 1; an input-side reactor 31 is connected in series between the AC side and the AC output terminal of the compensating DC-AC converter 21. The input-side reactor 31 can realize four-quadrant operation of the AC side of the compensating DC-AC converter 21.

[0034] like Figure 2 As shown, in this embodiment, a compensation capacitor 4 is connected in parallel between the DC side of the compensation AC-DC converter 1 and the positive and negative busbars of the DC side of the compensation DC-AC converter 21. The compensation capacitor 4 can provide voltage support for the positive and negative busbars of the DC side of the compensation AC-DC converter 1 and the DC side of the compensation DC-AC converter 21.

[0035] In this embodiment, the fully controlled switching devices of the AC-DC converter 1 and the compensation DC-AC converter 21 are one of an insulated gate bipolar power transistor IGBT, an electron injection enhanced gate transistor IEGT, an integrated gate commutated thyristor IGCT and a turn-off thyristor GTO.

[0036] The above description is merely a preferred embodiment of the present invention. The scope of protection of the present invention is not limited to the above embodiment. All technical solutions based on the concept of the present invention are within the scope of protection of the present invention. It should be noted that for those skilled in the art, various improvements and modifications that do not depart from the principles of the present invention should also be considered within the scope of protection of the present invention.

Claims

1. A dynamic model-physical integrated wind turbine generator set, comprising a wind turbine (5), a direct-drive wind power generation system (6), and a wind turbine dynamic simulation system (7), characterized in that: The dynamic model-physical integrated wind turbine generator set also includes a compensation device dynamic simulation system, the direct drive wind power generation system (6) includes a permanent magnet generator (61), a generator side contactor (62), a first AC-DC converter (63), a first DC capacitor (64), a first DC-AC converter (65), a busbar side reactor (66), a busbar side contactor (67) and a first isolation transformer (68), the permanent magnet generator (61) is connected to the main shaft of the wind turbine (5), and the output end of the permanent magnet generator (61) is sequentially connected through the generator side contactor (62), the first AC-DC converter (63), the first DC-AC converter (65), the busbar side reactor (66), the busbar side reactor (67) and the first isolation transformer (68). The first DC capacitor (64) is arranged in parallel between the DC busbars of the first AC-DC converter (63) and the first DC-AC converter (65); the AC output terminal T of the compensation device dynamic simulation system is connected between the busbar-side reactor (66) and the busbar-side contactor (67); the compensation device dynamic simulation system includes a compensation AC-DC converter (1) and a compensation bidirectional DC-DC converter (2) for providing compensation energy for the AC-DC converter (1); the AC side of the compensation AC-DC converter (1) is provided with a DC output terminal T for connecting to the DC busbar; The AC output terminal of the drive-type wind power generation system is connected to the AC output terminal of the compensation AC-DC converter (1), the DC side of the compensation bidirectional DC-DC converter (2) is connected to each other, and the other DC side of the compensation bidirectional DC-DC converter (2) is provided with a DC input terminal; the wind turbine dynamic simulation system (7) includes an AC motor (71), a motor side contactor (72), a second AC-DC converter (73), a second DC capacitor (74), a second DC-AC converter (75), a mains side reactor (76), a mains side contactor (77) and a second isolation transformer (78), the AC motor (71) is connected to the main shaft of the wind turbine (5) through a transmission. One side of the second isolation transformer (78) is connected to the mains, and the other side is connected to the AC motor (71) in sequence through the mains side contactor (77), the mains side reactor (76), the second DC-AC converter (75), the second AC-DC converter (73), and the motor side contactor (72); the second DC capacitor (74) is arranged in parallel between the DC side positive and negative busbars of the second AC-DC converter (73) and the second DC-AC converter (75); the DC side positive and negative busbars of the second AC-DC converter (73) and the second DC-AC converter (75) are connected in parallel to the DC input terminal of the compensating bidirectional DC-DC converter (2); When it is necessary to verify the target wind turbine generator strategy, the wind turbine (5) is controlled to completely retract the blades, and the wind turbine dynamic simulation system (7) is controlled to dynamically simulate the wind turbine (5) to drive the direct-drive wind power generation system (6) running the target wind turbine generator strategy to obtain the test results of the direct-drive wind power generation system (6) running the target wind turbine generator strategy under different working conditions; after completion, it is necessary to exit the wind turbine dynamic simulation system (7); when it is necessary to perform power generation operations, the wind turbine (5) is controlled to release the blades, and by default, the wind turbine (5) only drives the direct-drive wind power generation system (6) to generate electricity, and only when the wind speed exceeds the set value, the wind turbine dynamic simulation system (7) is controlled to switch to the power generation mode, and the wind turbine (5) drives the direct-drive wind power generation system (6) and the wind turbine dynamic simulation system (7) to generate electricity at the same time, and the wind turbine (5) is controlled to release the blades to control the release state as needed until the blades are completely released.

2. The dynamic model-physical integrated wind turbine generator set according to claim 1, characterized in that: A wind power generation system side reactor (3) is connected in series between the AC side and the AC output terminal of the compensation AC-DC converter (1).

3. The dynamic model-physical integrated wind turbine generator set according to claim 2, characterized in that: A compensation capacitor (4) is connected in parallel between the DC side of the compensation AC-DC converter (1) and the positive and negative busbars of the DC side of the compensation bidirectional DC-DC converter (2).

4. The dynamic model-physical integrated wind turbine generator set according to claim 3, characterized in that: The fully controlled switching devices of the compensation AC-DC converter (1) and the compensation bidirectional DC-DC converter (2) are 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.

5. A dynamic model-physical integrated wind turbine generator set, comprising a wind turbine (5), a direct-drive wind power generation system (6), and a wind turbine dynamic simulation system (7), characterized in that: The dynamic model-physical integrated wind turbine generator set also includes a compensation device dynamic simulation system. The direct-drive wind power generation system (6) includes a permanent magnet generator (61), a generator side contactor (62), a first AC-DC converter (63), a first DC capacitor (64), a first DC-AC converter (65), a busbar side reactor (66), a busbar side contactor (67) and a first isolation transformer (68). The permanent magnet generator (61) is connected to the main shaft of the wind turbine (5) through a transmission. The output end of the permanent magnet generator (61) is sequentially connected through the generator side contactor (62), the first AC-DC converter (63), the first DC capacitor (64), the first DC-AC converter (65), the busbar side reactor (66), the busbar side contactor (67) and the first isolation transformer (68). A DC-AC converter (65), a busbar-side reactor (66), a busbar-side contactor (67) and a first isolation transformer (68) are connected, the first DC capacitor (64) is arranged in parallel between the DC-side buses of the first AC-DC converter (63) and the first DC-AC converter (65), and the AC output terminal T of the compensation device dynamic simulation system is connected between the busbar-side reactor (66) and the busbar-side contactor (67); the compensation device dynamic simulation system includes a compensation AC-DC converter (1) and a compensation DC-AC converter for providing compensation energy to the compensation AC-DC converter (1). The AC side of the compensating AC-DC converter (1) is provided with an AC output terminal for connecting to a direct-drive wind power generation system, and the DC side of the compensating AC-DC converter (1) is connected to the DC side of the compensating DC-AC converter (21); the wind turbine dynamic simulation system (7) includes an AC motor (71), a motor-side contactor (72), a second AC-DC converter (73), a second DC capacitor (74), a second DC-AC converter (75), a mains-side reactor (76), a mains-side contactor (77) and a second isolation transformer (78), the AC motor (71) and the wind turbine ( 5), one side of the second isolation transformer (78) is connected to the mains, and the other side is connected to the AC motor (71) in sequence through the mains side contactor (77), the mains side reactor (76), the second DC-AC converter (75), the second AC-DC converter (73), and the motor side contactor (72); the second DC capacitor (74) is arranged in parallel between the DC side positive and negative busbars of the second AC-DC converter (73) and the second DC-AC converter (75); the AC side T of the compensation DC-AC converter (21) is connected between the mains side reactor (76) and the mains side contactor (77);When it is necessary to verify the target wind turbine generator strategy, the wind turbine (5) is controlled to completely retract the blades, and the wind turbine dynamic simulation system (7) is controlled to dynamically simulate the wind turbine (5) to drive the direct-drive wind power generation system (6) running the target wind turbine generator strategy to obtain the test results of the direct-drive wind power generation system (6) running the target wind turbine generator strategy under different working conditions; after completion, it is necessary to exit the wind turbine dynamic simulation system (7); when it is necessary to perform power generation operations, the wind turbine (5) is controlled to release the blades, and by default, the wind turbine (5) only drives the direct-drive wind power generation system (6) to generate electricity, and only when the wind speed exceeds the set value, the wind turbine dynamic simulation system (7) is controlled to switch to the power generation mode, and the wind turbine (5) drives the direct-drive wind power generation system (6) and the wind turbine dynamic simulation system (7) to generate electricity at the same time, and the wind turbine (5) is controlled to release the blades to control the release state until the blades are completely released as needed.

6. The dynamic model-physical integrated wind turbine generator set according to claim 5, characterized in that: A wind power generation system side reactor (3) is connected in series between the AC side and the AC output terminal of the compensation AC-DC converter (1), and an input side reactor (31) is connected in series between the AC side and the AC output terminal of the compensation DC-AC converter (21).

7. The dynamic model-physical integrated wind turbine generator set according to claim 6, characterized in that: A compensation capacitor (4) is connected in parallel between the DC side of the compensation AC-DC converter (1) and the positive and negative busbars of the DC side of the compensation DC-AC converter (21).

8. The dynamic model-physical integrated wind turbine generator set according to claim 7, characterized in that: The fully controlled switching devices of the AC-DC converter (1) and the compensation DC-AC converter (21) are 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.

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