CN110703020A - Wind power complete machine test bed and harmonic suppression method thereof - Google Patents
Wind power complete machine test bed and harmonic suppression method thereof Download PDFInfo
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Abstract
The application provides a wind power complete machine test bed and a harmonic suppression method thereof, relating to the field of wind power generation, wherein the wind power complete machine test bed comprises a driving motor frequency converter, a motor, a wind generating set and a converter; the driving motor frequency converter is electrically connected with the motor; the motor is electrically connected with the wind generating set; the wind generating set is electrically connected with the converter; the converter is electrically connected with the frequency converter of the driving motor; the first active filter is used for suppressing a first harmonic generated by a frequency converter of the driving motor when a first electric signal with the first harmonic is obtained; and the second active filter is used for inhibiting second harmonic waves generated by the converter when a second electric signal output by the wind generating set is output to the frequency converter of the driving motor through the converter. After the first harmonic and the second harmonic are suppressed, the wind power complete machine test stand realizes the function of suppressing the harmonic from a harmonic source, and can improve the performance of the wind power complete machine test stand.
Description
Technical Field
The invention relates to the field of wind power generation, in particular to a wind power complete machine test bed and a harmonic suppression method of the wind power complete machine test bed.
Background
With the continuous development of the wind power industry, the performance requirements of a wind power complete machine test bed are also continuously improved, at present, the main factors influencing the performance of the wind power complete machine test bed are a large amount of harmonic currents generated by a converter in a wind generating set and a frequency converter in an inversion driving device in a test, and the harmonic currents can deteriorate the output power quality of the whole wind power generation system and influence the normal operation of equipment.
In the prior art, an isolation transformer or a passive filter is usually connected to the low-voltage power supply incoming line side of a wind power complete machine test bed, or the combination of the isolation transformer and the passive filter is used for suppressing harmonic current generated in the test bed, the method can enable electric energy output to a power grid to meet the national requirements only under the condition of excellent debugging or configuration, only can passively suppress harmonic current, cannot actively suppress harmonic from a harmonic source in the wind power complete machine test bed, and reduces the performance of the wind power complete machine test bed.
Disclosure of Invention
In view of the above, the invention aims to provide a wind power complete machine test stand and a harmonic suppression method for the wind power complete machine test stand, which are used for actively suppressing harmonic from a harmonic source in the wind power complete machine test stand and improving the performance of the wind power complete machine test stand.
In order to achieve the purpose, the technical scheme adopted by the embodiment of the invention is as follows:
in a first aspect, the application provides a wind power complete machine test bed, which comprises a driving motor frequency converter, a motor, a wind generating set and a converter; the driving motor frequency converter is electrically connected with the motor; the motor is electrically connected with the wind generating set; the wind generating set is electrically connected with the converter; the converter is electrically connected with the driving motor frequency converter; the wind power complete machine test bed also comprises a first active filter and a second active filter;
the first active filter is used for suppressing a first harmonic generated by the driving motor frequency converter when a first electric signal with the first harmonic is obtained;
and the second active filter is used for inhibiting second harmonic waves generated by the converter when a second electric signal output by the wind generating set is output to the driving motor frequency converter through the converter.
With reference to the first aspect, in a first possible implementation manner, the first active filter is disposed on an input electrical signal side of the drive motor frequency converter.
With reference to the first aspect, in a second possible implementation manner, the second active filter is disposed on an output electrical signal side of the current transformer.
With reference to the first aspect, in a third possible implementation manner, the first active filter includes: a first control circuit loop and a first power loop; the first control circuit loop is electrically connected with the first power circuit loop;
the first control electric loop is used for controlling the first power loop to generate a first compensation current according to the first harmonic;
the first power loop is used for inputting the first compensation current to the drive motor frequency converter so as to suppress the first harmonic.
With reference to the first aspect, in a fourth possible implementation manner, the second active filter includes: a second control circuit loop and a second power loop; the second control circuit loop is electrically connected with the second power circuit loop;
the second control electric loop is used for controlling the second power loop to generate a second compensation current according to the second harmonic;
and the second power loop is used for outputting the second compensation current to the driving motor frequency converter so as to suppress the second harmonic.
In a second aspect, the present application provides a method for suppressing harmonics of a wind power complete machine, where the method is applied to the wind power complete machine test stand described in the first aspect, and the method includes:
the first active filter obtaining a first electrical signal having a first harmonic;
the first active filter inputs a first compensation current to the drive motor frequency converter according to the first harmonic so as to suppress the first harmonic;
the driving motor frequency converter outputs a first electric signal to the motor so as to drive the wind generating set to work;
the wind generating set inputs a second electric signal to the converter;
said current transformer inputting said second electrical signal having a second harmonic to said second active filter;
and the second active filter inputs a second compensation current to the drive motor frequency converter according to the second harmonic so as to suppress the second harmonic.
With reference to the second aspect, in a first possible implementation manner, the step of inputting, by the first active filter, a first compensation current to the drive motor frequency converter according to the first electric signal so as to suppress the first harmonic includes:
the first control electric loop controls a first power loop to generate the first compensation current according to the first harmonic;
the first power loop inputs the first compensation current to the drive motor frequency converter to suppress the first harmonic.
With reference to the second aspect, in a second possible implementation manner, the step of inputting, by the second active filter, a second compensation current to the drive motor frequency converter according to the second electric signal so as to suppress the second harmonic includes:
the second control electric loop controls a second power loop to generate the second compensation current according to the second harmonic;
the second power loop outputs the second compensation current to the drive motor frequency converter to suppress the second harmonic.
The application provides a wind power complete machine test bed and a harmonic suppression method thereof, relating to the field of wind power generation, wherein the wind power complete machine test bed comprises a driving motor frequency converter, a motor, a wind generating set and a converter; the driving motor frequency converter is electrically connected with the motor; the motor is electrically connected with the wind generating set; the wind generating set is electrically connected with the converter; the converter is electrically connected with the frequency converter of the driving motor; the first active filter is used for suppressing a first harmonic generated by a frequency converter of the driving motor when a first electric signal with the first harmonic is obtained; and the second active filter is used for inhibiting second harmonic waves generated by the converter when a second electric signal output by the wind generating set is output to the frequency converter of the driving motor through the converter. After the first harmonic and the second harmonic are suppressed, the wind power complete machine test stand realizes the function of suppressing the harmonic from a harmonic source, and can improve the performance of the wind power complete machine test stand.
Additional features and advantages of embodiments of the invention will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by practice of embodiments of the invention. The objectives and other advantages of the invention will be realized and attained by the structure particularly pointed out in the written description and claims hereof as well as the appended drawings.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.
FIG. 1 is an electrical circuit diagram of a wind power complete machine test bed;
FIG. 2 is a schematic structural diagram of a wind power complete machine test bed provided by the embodiment of the application;
fig. 3 is an electrical circuit diagram of a wind power complete machine test bed provided in the embodiment of the present application;
fig. 4 is a schematic structural diagram of the first active filter 105 according to an embodiment of the present disclosure;
FIG. 5 is a schematic flow chart of a wind power complete machine harmonic suppression method provided in the embodiment of the present application;
fig. 6 is a schematic flow chart of another harmonic suppression method for a wind power complete machine test stand according to the embodiment of the present application;
fig. 7 is a schematic flow chart of another method for suppressing harmonic waves of a wind power complete machine test stand according to the embodiment of the present application.
Icon: 10-wind power complete machine test bed; 101-driving a motor frequency converter; 102-an electric motor; 103-a wind generating set; 104-a current transformer; 105-a first active filter; 106-a second active filter; 1051-a first control circuit loop; 1052-first power loop.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are some embodiments of the present application, but not all embodiments. The components of the embodiments of the present application, generally described and illustrated in the figures herein, can be arranged and designed in a wide variety of different configurations.
Thus, the following detailed description of the embodiments of the present application, presented in the accompanying drawings, is not intended to limit the scope of the claimed application, but is merely representative of selected embodiments of the application. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures. Meanwhile, in the description of the present application, the terms "first", "second", and the like are used only for distinguishing the description, and are not to be construed as indicating or implying relative importance.
It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.
In the description of the present application, it should be noted that the terms "upper", "lower", "inner", "outer", and the like indicate orientations or positional relationships based on orientations or positional relationships shown in the drawings or orientations or positional relationships conventionally found in use of products of the application, and are used only for convenience in describing the present application and for simplification of description, but do not indicate or imply that the referred devices or elements must have a specific orientation, be constructed in a specific orientation, and be operated, and thus should not be construed as limiting the present application.
In the description of the present application, it is also to be noted that, unless otherwise explicitly specified or limited, the terms "disposed" and "connected" are to be interpreted broadly, e.g., as being either fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present application can be understood in a specific case by those of ordinary skill in the art.
Some embodiments of the present application will be described in detail below with reference to the accompanying drawings. The embodiments described below and the features of the embodiments can be combined with each other without conflict.
The wind power complete machine test bed is test equipment for comprehensively testing a fan, and in the test process of the wind power complete machine test bed, a large amount of harmonic waves can be generated by electric equipment containing nonlinear elements, such as a converter, a frequency converter and the like, and the harmonic waves can easily damage the electric equipment, and reduce the performance of the test bed and the quality of output electric energy.
For describing the situation of harmonic generation in the wind power complete machine test bed in detail, referring to fig. 1, fig. 1 is an electrical circuit diagram of the wind power complete machine test bed; specifically, the electrical circuit diagram includes:
the transformer is used for transmitting electric energy to the transformer through a cable inlet wire, the transformer is used for transmitting the electric energy to a low-voltage power supply through a 690V bus through a transformer inlet wire cabinet after the electric energy is adjusted, and a test point 1 is arranged between the transformer and the 690V bus and used for testing whether harmonic waves are generated at the inlet wire side of the low-voltage power supply when the low-voltage power supply supplies power to the wind power complete machine test bed.
The wind power complete machine test bed is connected with the 690V bus output end, the wind power complete machine comprises a capacitance candidate device, an inversion driving device and a wind generating set, and the inversion driving device is connected between the capacitance candidate device and the wind generating set.
Specifically, the inverter driving device is a frequency converter, and a test point 2 is arranged on the incoming line side of the converter and used for testing whether harmonic waves are generated at the position of the frequency converter.
Specifically, the wind generating set comprises a converter, wherein a test point 3 is arranged at the output end of the converter and used for testing whether the converter generates harmonic waves when the electric energy generated by the wind generating set is regulated by the converter and inputting the harmonic waves to the frequency converter from the output side.
In order to intuitively describe the generation condition of the harmonic wave in the wind power complete machine test bed, table 1 is provided below to show the test results at test point 1, test point 2 and test point 3 to explain the above embodiment.
TABLE 1 internal harmonic test example of wind power complete machine test bed
Referring to table 1, it can be seen from table 1 that, in the electrical parameters obtained by testing at the test points 1, 2 and 3, the voltages and currents are distorted, and three-phase current imbalance rates occur, which indicates that harmonics exist at the test points 1, 2 and 3, and the voltages and currents at the three test points are distorted.
Specifically, the test point 1 is a harmonic at the inlet side of the low-voltage power supply, and the harmonic may come from a transformer, a drive motor frequency converter, a converter, or a power grid harmonic transmitted through a cable inlet, and belongs to an external harmonic entering a wind power complete machine test bed or an internal harmonic inside the wind power complete machine test bed.
Specifically, the harmonic waves at the test point 2 and the test point 3 are the harmonic waves generated by the frequency converter of the driving motor and the harmonic waves generated by the converter, and belong to the internal harmonic waves of the wind power complete machine test bed, so that the internal harmonic wave source of the wind power complete machine test bed has two places: one is a converter at the wind generating set, and the other is an inversion driving device, namely a driving motor frequency converter. When harmonic suppression is performed from two harmonic sources, the harmonic at the test point 1 no longer exists.
In the prior art, an isolation transformer or an LC filter is usually arranged on the incoming line side of a low-voltage power supply, that is, at a test point 1 in fig. 1, to suppress harmonics, but this method can only isolate harmonics, cannot completely suppress harmonics from a harmonic source, and has a poor filtering effect.
In order to effectively and thoroughly eliminate harmonic waves from a harmonic source inside a wind power complete machine test bed, the method and the device have the idea that harmonic waves are suppressed from the root of harmonic wave generation by arranging an active filter, so that the purpose of suppressing the harmonic waves of the complete machine test bed from the harmonic source is achieved.
In order to achieve the purpose of suppressing harmonic waves from a harmonic source in a wind power complete machine test bed, the embodiment of the application provides a possible implementation mode of the wind power complete machine test bed. Optionally, for describing main components in the wind power complete machine test stand and functional relationships between the main components in the wind power complete machine test stand in detail, please refer to fig. 2, and fig. 2 is a schematic structural diagram of the wind power complete machine test stand provided in an embodiment of the present application, where the wind power complete machine test stand 10 includes a driving motor frequency converter 101, an electric motor 102, a wind generating set 103, and a converter 104. Each component can be connected into a loop through an electric wire to transmit electric signals; the wind power complete machine test stand 10 further comprises a first active filter 105 and a second active filter 106.
A first active filter 105 for suppressing a first harmonic generated by the drive motor frequency converter 101 when obtaining a first electrical signal having the first harmonic.
And the second active filter 106 is used for suppressing a second harmonic wave generated by the converter 104 when the second electric signal output by the wind generating set 103 is output to the driving motor frequency converter 101 through the converter 104.
Optionally, the driving motor frequency converter 101 is used to provide electric energy for the motor 102, and only one driving motor frequency converter 101 may be connected to the wind power complete machine test stand 10, or a plurality of driving motor frequency converters 101 may be connected in parallel.
Specifically, the input end of the driving motor frequency converter 101 is connected with a system power supply of the wind power complete machine test bed, and when the input end is used for obtaining an electric signal from a transformer, harmonic waves may be generated by the input end; the output end of the drive motor frequency converter 101 is connected with the input end of the motor 102, and is used for outputting the obtained electric signal to the motor 102, so that the motor 102 drives the wind generating set 103 to work.
Optionally, the electric motor 102 is used to convert the received electric energy into mechanical energy for operating the wind turbine 103.
Specifically, the input end of the motor 102 is connected to the output end of the driving motor frequency converter 101, and receives a first electric signal output from the driving motor frequency converter 101; the output end of the motor 102 is connected with the input end of the wind generating set 103 for providing mechanical energy for the wind generating set 103.
Optionally, the wind park 103 is used to convert mechanical energy from the motor 102 into electrical energy.
Specifically, the input end of the wind turbine 103 is connected to the output end of the electric motor 102, and the output end thereof is connected to the converter 104, for outputting the second electric signal to the loop through the converter 104.
Optionally, the converter 104 is used to implement the adjustment of the power characteristics of the output power of the wind turbine generator system 103 to be consistent with the characteristics of the power requirements of the grid.
Specifically, the converter 104 is connected to the output terminal of the wind turbine generator 103 through the input terminal to receive the electric signal, and outputs the electric signal to the driving motor frequency converter 101 connected to the output terminal thereof. During the power conditioning process, the converter 104 generates a large amount of harmonics, which are fed back to the drive motor inverter 101 via a loop and damage the interior thereof.
The application provides a wind power complete machine test bed which comprises a driving motor frequency converter, a motor, a wind generating set and a converter; the driving motor frequency converter is electrically connected with the motor; the motor is electrically connected with the wind generating set; the wind generating set is electrically connected with the converter; the converter is electrically connected with the frequency converter of the driving motor; the device also comprises a first active filter and a second active filter; the first active filter is used for suppressing a first harmonic generated by the frequency converter of the driving motor when obtaining a first electric signal with the first harmonic; and the second active filter is used for inhibiting second harmonic waves generated by the converter when a second electric signal output by the wind generating set is output to the frequency converter of the driving motor through the converter. After the first harmonic and the second harmonic are suppressed, the wind power complete machine test stand realizes the function of suppressing the harmonic from a harmonic source, and can improve the performance of the wind power complete machine test stand.
Optionally, in order to describe in detail how the first active filter 105 and the second active filter 106 suppress harmonics from the harmonic source of the wind power complete machine test stand 10, a possible implementation manner of the electrical loop of the wind power complete machine test stand 10 is given below on the basis of fig. 1, specifically, the first active filter 105 and the second active filter 106 are additionally arranged at the test point 2 and the test point 3 of fig. 1, so as to suppress harmonics at the test point 2 and the test point 3. Referring to fig. 3 specifically, fig. 3 is an electrical circuit diagram of a wind turbine complete machine test bed provided in the embodiment of the present application.
Specifically, in order to suppress the harmonic at the test point 2, the first active filter 105 is disposed at the test point 2 in fig. 3, and on the input signal side of the inverter driving device (i.e., the driving motor frequency converter 101), when the first electric signal with the first harmonic passes through the first active filter 105, the first active filter 105 generates a first compensation current to suppress the first harmonic, so as to prevent the harmonic generated in the inverter driving device from damaging the equipment.
In particular, in order to suppress harmonics at the test point 3, a second active filter 106 is provided at the test point 3 in fig. 3, i.e. at the output side of the wind park. When a second electric signal sent by the generator set passes through the converter, the converter generates a second harmonic, and feeds the second electric signal with the second harmonic back to the driving motor frequency converter 101 through a loop, and the second active filter 106 generates a second compensation current after receiving the second electric signal, so as to suppress the second harmonic and prevent the second harmonic generated by the converter from being input into the inversion driving device through the loop to damage equipment.
When the first harmonic wave at the test point 2 is suppressed by the first active filter 105 and the second harmonic wave at the test point 3 is suppressed by the second active filter 106, the harmonic wave at the test point 1 does not exist any more, and thus the wind power complete machine test stand realizes the function of suppressing the harmonic wave from the harmonic wave source.
Alternatively, the first active filter 105 and the second active filter 106 are both devices for suppressing harmonics by generating a compensation current, and have similar functional structures, in order to describe in detail the process of suppressing harmonics by generating a compensation current, the following takes the first active filter 105 as an example to give a possible implementation, see fig. 4, where fig. 4 is a schematic structural diagram of the first active filter 105 provided in the embodiment of the present application, and specifically, the first active filter 105 includes a first control circuit 1051 and a first power circuit 1052; first control circuit 1051 is electrically coupled to first power circuit 1052.
A first control circuit 1051 for controlling the first power circuit to generate a first compensation current according to the first harmonic.
A first power loop 1052 for outputting a first compensation current to the drive motor frequency converter 101 to suppress the first harmonic.
Specifically, when a first signal having a first harmonic is output to the first active filter 105, the first control circuit 1051 collects the first electrical signal output by the converter and obtains a parameter of the first electrical signal, which may be a voltage, a current, a phase, etc., and then transmits the obtained parameter to the first power circuit 1052, so that the first power circuit 1052 generates a first compensation current.
Specifically, after the first power loop 1052 receives the parameters transmitted by the first control circuit 1051, a first compensation current with the same magnitude and opposite direction as the second harmonic is generated according to the parameters, and the first compensation current is output to the driving motor frequency converter 101, so that the first harmonic generated by the driving motor frequency converter 101 is suppressed, and the damage of the equipment is prevented.
In order to describe specifically how the wind power complete machine test stand 10 provided in the embodiment of the present application performs harmonic suppression from a harmonic source when working, an embodiment of the present application provides a wind power complete machine harmonic suppression method, and referring to fig. 5, fig. 5 is a schematic flow diagram of the wind power complete machine harmonic suppression method provided in the embodiment of the present application. Specifically, the method comprises the following steps:
And 302, inputting a first compensation current to the driving motor frequency converter by the first active filter according to the first harmonic so as to suppress the first harmonic generated by the driving motor frequency converter.
And 303, driving the motor frequency converter to output a first electric signal to the motor so as to drive the wind generating set to work.
And step 304, the wind generating set inputs a second electric signal to the converter.
And step 306, inputting a second compensation current to the drive motor frequency converter by the second active filter according to the second harmonic wave so as to suppress the second harmonic wave.
Optionally, with respect to how the first active filter suppresses the first harmonic input to the drive motor frequency converter, a possible implementation manner is given below on the basis of fig. 5, referring to fig. 6, fig. 6 is a schematic flow diagram of another wind power complete machine test stand harmonic suppression method provided by the embodiment of the present application, where step 302 specifically includes:
And step 302b, inputting a first compensation current to the driving motor frequency converter by the first power loop so as to suppress the first harmonic.
Specifically, when a first signal with a first harmonic is output to the first active filter, the first control circuit collects the first electrical signal with the first harmonic, obtains a parameter of the first electrical signal, which may be a voltage, a current, a phase, and the like, and transmits the obtained parameter to the first power circuit, so that the first power circuit generates a first compensation current.
Specifically, after the first power loop receives the parameters transmitted by the first control electric loop, first compensation current with the same magnitude and the opposite direction as the second harmonic is generated according to the parameters, and the first compensation current is output to the driving motor frequency converter, so that the first harmonic generated by the driving frequency converter is restrained, and equipment damage is prevented.
Optionally, a possible implementation manner is given below on the basis of fig. 3 for how the second active filter suppresses the second harmonic current generated by the converter, referring to fig. 7, fig. 7 is a schematic flow diagram of another harmonic suppression method for a wind power complete machine test stand provided by the embodiment of the present application, where step 306 specifically includes:
step 306a, the second control circuit controls the second power loop to generate a second compensation current according to the second harmonic.
And step 306b, inputting a second compensation current to the driving motor frequency converter by the second power loop so as to suppress a second harmonic.
Specifically, when the second signal with the second harmonic is output from the converter to the second active filter, the second control electrical loop collects the second electrical signal with the second harmonic output by the converter and obtains a parameter of the second electrical signal, which may be a voltage, a current, a phase, etc., and then transmits the obtained parameter to the second power loop.
Specifically, after the second power loop receives the parameters transmitted by the second control electric loop, second compensation current with the same magnitude and the opposite direction as the second harmonic is generated according to the parameters, and the second compensation current is output to the driving motor frequency converter, so that the second harmonic generated by the converter is suppressed, and the second harmonic is prevented from being fed back into the driving motor frequency converter through the loop to cause equipment damage.
The application provides a harmonic suppression method for a wind power complete machine test bed, which is applied to the wind power complete machine test bed, wherein the wind power complete machine test bed comprises a driving motor frequency converter, a motor, a wind generating set and a converter; the driving motor frequency converter is electrically connected with the motor; the motor is electrically connected with the wind generating set; the wind generating set is electrically connected with the converter; the converter is electrically connected with the frequency converter of the driving motor; the device also comprises a first active filter and a second active filter; suppressing a first harmonic generated by a driving motor frequency converter through a first active filter; the second harmonic generated by the converter is suppressed through the second active filter, and after the first harmonic and the second harmonic are suppressed, the wind power complete machine test stand realizes the function of suppressing the harmonic from a harmonic source, and can improve the performance of the wind power complete machine test stand.
In the several embodiments provided in this application, it should be understood that the disclosed structures and methods may be implemented in other ways. The apparatus embodiments described above are merely illustrative and, for example, the flowchart and block diagrams in the figures illustrate the architecture, functionality, and operation of possible implementations of structures, methods and computer program products according to various embodiments of the present application. In this regard, each block in the flowchart or block diagrams may represent a module, segment, or portion of code, which comprises one or more executable instructions for implementing the specified logical function(s). It should also be noted that, in some alternative implementations, the functions noted in the block may occur out of the order noted in the figures. For example, two blocks shown in succession may, in fact, be executed substantially concurrently, or the blocks may sometimes be executed in the reverse order, depending upon the functionality involved. It will also be noted that each block of the block diagrams and/or flowchart illustration, and combinations of blocks in the block diagrams and/or flowchart illustration, can be implemented by special purpose hardware-based systems which perform the specified functions or acts.
The above description is only a preferred embodiment of the present application and is not intended to limit the present application, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, improvement and the like made within the spirit and principle of the present application shall be included in the protection scope of the present application.
Claims (8)
1. A wind power complete machine test bed comprises a driving motor frequency converter, a motor, a wind generating set and a converter; the driving motor frequency converter is electrically connected with the motor; the motor is electrically connected with the wind generating set; the wind generating set is electrically connected with the converter; the converter is electrically connected with the driving motor frequency converter; the test bed is characterized by further comprising a first active filter and a second active filter;
the first active filter is used for suppressing a first harmonic generated by the driving motor frequency converter when a first electric signal with the first harmonic is obtained;
and the second active filter is used for inhibiting second harmonic waves generated by the converter when a second electric signal output by the wind generating set is output to the driving motor frequency converter through the converter.
2. The wind power complete machine test stand according to claim 1, wherein the first active filter is arranged on the input electric signal side of the drive motor frequency converter.
3. The wind power complete machine test stand according to claim 1, wherein the second active filter is arranged on the side of the output electric signal of the converter.
4. The wind power complete machine test stand of claim 1, wherein the first active filter comprises: a first control circuit loop and a first power loop; the first control circuit loop is electrically connected with the first power circuit loop;
the first control electric loop is used for controlling the first power loop to generate a first compensation current according to the first harmonic;
the first power loop is used for inputting the first compensation current to the drive motor frequency converter so as to suppress the first harmonic.
5. The wind power complete machine test stand of claim 1, wherein the second active filter comprises: a second control circuit loop and a second power loop; the second control circuit loop is electrically connected with the second power circuit loop;
the second electric control circuit is used for controlling the second power loop to generate a second compensation current according to the second harmonic;
and the second power loop is used for outputting the second compensation current to the driving motor frequency converter so as to suppress the second harmonic.
6. A wind power complete machine harmonic suppression method is characterized in that the method is applied to the wind power complete machine test stand of any one of claims 1-5, and comprises the following steps:
the first active filter obtaining a first electrical signal having a first harmonic;
the first active filter inputs a first compensation current to the driving motor frequency converter according to the first harmonic so as to suppress the first harmonic generated by the driving motor frequency converter;
the driving motor frequency converter outputs a first electric signal to the motor so as to drive the wind generating set to work;
the wind generating set inputs a second electric signal to the converter;
said current transformer outputting said second electrical signal having a second harmonic to said second active filter;
the second active filter inputs a second compensation current to the drive motor frequency converter according to the second harmonic wave to suppress the second harmonic wave.
7. The method of claim 6, wherein the step of inputting a first compensation current to the drive motor inverter to suppress the first harmonic based on the first harmonic by the first active filter comprises:
the first control electric loop controls a first power loop to generate the first compensation current according to the first harmonic;
the first power loop inputs the first compensation current to the drive motor frequency converter to suppress the first harmonic.
8. The method of claim 6, wherein the step of inputting a second compensation current to the drive motor inverter to suppress a second harmonic according to the second active filter having the second harmonic comprises:
the second control electric loop controls a second power loop to generate the second compensation current according to the second harmonic;
the second power loop outputs the second compensation current to the drive motor frequency converter to suppress the second harmonic.
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Citations (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20050251369A1 (en) * | 2004-05-07 | 2005-11-10 | Decarlo Robert D | Decoding an alternator output signal |
| CN102621408A (en) * | 2011-10-20 | 2012-08-01 | 无锡清源电气科技有限公司 | Test system and test method of general converter product |
| CN202444280U (en) * | 2012-02-24 | 2012-09-19 | 陕西科技大学 | Grid-connected wind power generation experimental device based on excitation synchronous generator |
| US20130027000A1 (en) * | 2011-07-27 | 2013-01-31 | Heng Deng | Reduction of noise and vibrations of an electromechanical transducer by using a modified stator coil drive signal comprising harmonic components |
| CN102957378A (en) * | 2012-11-05 | 2013-03-06 | 郭高朋 | Modularized multi-level converter-based high-voltage high-capacity frequency changer system |
| CN103280836A (en) * | 2013-05-23 | 2013-09-04 | 中国科学院电工研究所 | Flywheel energy storage system grid-connected control method and energy storage system thereof |
| CN104882889A (en) * | 2015-06-05 | 2015-09-02 | 江苏同芯电气科技有限公司 | Composite circuit integrating rectification, active power filtering and energy feedback braking functions |
| CN205160096U (en) * | 2015-11-28 | 2016-04-13 | 华南理工大学 | Many converter module each other for generating set conversion system of reserve variable speed constant frequency |
| CN105552953A (en) * | 2015-12-15 | 2016-05-04 | 云南电网有限责任公司电力科学研究院 | Fully-open real-time monitoring dual-fed wind power generation test system |
| CN206670929U (en) * | 2017-02-24 | 2017-11-24 | 中国铁建高新装备股份有限公司 | Direct current common bus locomotive bed electric drive system based on multiple four-quadrant rectification |
| CN107783041A (en) * | 2017-11-27 | 2018-03-09 | 华北电力科学研究院有限责任公司 | The test of transducer drive electric system power supply disturbance tolerance, evaluation method and device |
-
2019
- 2019-10-12 CN CN201910970158.4A patent/CN110703020B/en active Active
Patent Citations (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20050251369A1 (en) * | 2004-05-07 | 2005-11-10 | Decarlo Robert D | Decoding an alternator output signal |
| US20130027000A1 (en) * | 2011-07-27 | 2013-01-31 | Heng Deng | Reduction of noise and vibrations of an electromechanical transducer by using a modified stator coil drive signal comprising harmonic components |
| CN102621408A (en) * | 2011-10-20 | 2012-08-01 | 无锡清源电气科技有限公司 | Test system and test method of general converter product |
| CN202444280U (en) * | 2012-02-24 | 2012-09-19 | 陕西科技大学 | Grid-connected wind power generation experimental device based on excitation synchronous generator |
| CN102957378A (en) * | 2012-11-05 | 2013-03-06 | 郭高朋 | Modularized multi-level converter-based high-voltage high-capacity frequency changer system |
| CN103280836A (en) * | 2013-05-23 | 2013-09-04 | 中国科学院电工研究所 | Flywheel energy storage system grid-connected control method and energy storage system thereof |
| CN104882889A (en) * | 2015-06-05 | 2015-09-02 | 江苏同芯电气科技有限公司 | Composite circuit integrating rectification, active power filtering and energy feedback braking functions |
| CN205160096U (en) * | 2015-11-28 | 2016-04-13 | 华南理工大学 | Many converter module each other for generating set conversion system of reserve variable speed constant frequency |
| CN105552953A (en) * | 2015-12-15 | 2016-05-04 | 云南电网有限责任公司电力科学研究院 | Fully-open real-time monitoring dual-fed wind power generation test system |
| CN206670929U (en) * | 2017-02-24 | 2017-11-24 | 中国铁建高新装备股份有限公司 | Direct current common bus locomotive bed electric drive system based on multiple four-quadrant rectification |
| CN107783041A (en) * | 2017-11-27 | 2018-03-09 | 华北电力科学研究院有限责任公司 | The test of transducer drive electric system power supply disturbance tolerance, evaluation method and device |
Non-Patent Citations (2)
| Title |
|---|
| MEHDI T. ABOLHASSANI 等: "Integrated Doubly Fed Electric Alternator/Active Filter (IDEA), a Viable Power Quality Solution, for Wind Energy Conversion Systems", 《IEEE TRANSACTIONS ON ENERGY CONVERSION》 * |
| 张莉: "双馈风电并网谐波抑制的控制策略研究", 《中国优秀硕士学位论文全文数据库工程科技Ⅱ辑》 * |
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Address after: 102206 31 Industrial Park, North Qing Road, Beijing, Changping District Applicant after: Sany Heavy Energy Co.,Ltd. Address before: 102206 31 Industrial Park, North Qing Road, Beijing, Changping District Applicant before: SANY HEAVY ENERGY Co.,Ltd. |
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Effective date of registration: 20231111 Address after: 137000 Tongyu County Economic Development Zone, Baicheng City, Jilin Province Patentee after: TONGYU COUNTY SANYI WIND POWER EQUIPMENT TECHNOLOGY Co.,Ltd. Address before: 102206 31 Industrial Park, North Qing Road, Beijing, Changping District Patentee before: Sany Heavy Energy Co.,Ltd. |