CN213027872U - Variable frequency voltage-regulating output power generation device - Google Patents
Variable frequency voltage-regulating output power generation device Download PDFInfo
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- CN213027872U CN213027872U CN202021512365.XU CN202021512365U CN213027872U CN 213027872 U CN213027872 U CN 213027872U CN 202021512365 U CN202021512365 U CN 202021512365U CN 213027872 U CN213027872 U CN 213027872U
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Abstract
The utility model provides a pair of output power generation facility of variable frequency voltage modulation relates to the power supply and distribution technology field. The method comprises the following steps: the system comprises a frequency converter, a motor, a generator and control equipment; the motor is respectively connected with the frequency converter and the generator; the control equipment is respectively connected with the frequency converter, the generator and the motor; the frequency converter is used for connecting an input power supply, receiving a frequency conversion instruction of the control equipment and adjusting output voltage according to the frequency conversion instruction; and the motor is used for moving according to the output voltage so as to output mechanical energy to the generator, so that the generator generates electricity. The control device receives the control instruction, the frequency converter is connected with the control device and the motor respectively to adjust the output frequency of the motor, the motor outputs mechanical energy to the generator, the generator generates electricity, the control device adjusts the output voltage of the generator, wide-range voltage output of different frequencies of the generator is achieved, and control precision of the output voltage of the generator is improved.
Description
Technical Field
The utility model relates to a supply and distribution technical field particularly, relates to an output power generation facility of variable frequency voltage modulation.
Background
The generator is also called as a standby power supply or an emergency power supply, and is mainly applied to certain power utilization units, although the grid power supply is relatively reliable and reliable, in order to prevent accidents, such as circuit faults or temporary power failure, the generator needs to be configured with a self-contained power supply for emergency power generation. Due to the convenience of the generator, the existing generator is widely applied to various fields of national economy such as electric power, communication, industrial and mining and the like.
In order to improve the economy and the utilization rate of electric energy and supply electric power on some special occasions, a generator set combining a motor and a generator is adopted, and the generator set mainly provides a test power supply for pump industry tests, research on pump motors of scientific research units in colleges and universities and the like.
In the current generator set combining the motor and the generator, the voltage regulation of the motor generally adopts an analog quantity signal, and the analog quantity signal is influenced by the output impedance of a sending circuit, the resistance value of a cable, electromagnetic interference and the like, so that the voltage regulation signal reaching the generator is inconsistent with the signal at the output end of a controller of the motor, and the error between the output voltage of the generator and the expected voltage is larger.
SUMMERY OF THE UTILITY MODEL
In order to solve the problems existing in the prior art, the utility model provides an output power generation facility of variable frequency voltage modulation.
In order to achieve the above object, the utility model adopts the following technical scheme:
the utility model provides an output power generation facility of variable frequency modulation pressure, the device includes: the system comprises a frequency converter, a motor, a generator and control equipment;
the motor is respectively connected with the frequency converter and the generator; the control equipment is respectively connected with the frequency converter, the generator and the motor;
the frequency converter is used for connecting an input power supply, receiving a frequency conversion instruction of the control equipment and adjusting output voltage according to the frequency conversion instruction;
the motor is used for moving according to the output voltage so as to output mechanical energy to the generator, and the generator generates electricity.
Optionally, the control device is configured to sample an output voltage of the generator, and send a voltage control instruction to the generator according to the output voltage;
and the generator is used for receiving the voltage control instruction sent by the control equipment, adjusting output voltage according to the voltage control instruction and outputting the adjusted voltage to a connected load.
Optionally, the control device is specifically configured to send a voltage control instruction to the generator when the sampled output voltage does not satisfy a preset threshold.
Optionally, the control device is configured to sample a rotation speed of the motor and send a rotation speed adjustment instruction to the motor;
and the motor is used for receiving the rotating speed adjusting instruction and adjusting the rotating speed according to the rotating speed adjusting instruction.
Optionally, the apparatus further comprises: an instrument box; the instrument box is respectively connected with the control equipment, the generator and the motor;
the instrument box is used for receiving the rotating speed signal of the motor, the voltage signal and the current signal of the generator and displaying the rotating speed signal, the voltage signal and the current signal.
Optionally, the apparatus further comprises: a star-delta switch cabinet;
the star-delta switch cabinet comprises: the output ends of the first switch and the second switch are used for being connected with a load; the input ends of the first switch and the second switch are used for connecting the generator; the third switch is connected with the input ends of the generator and the second switch; when the first switch is closed, the second switch is opened and the third switch is closed, outputting a star connection; when the first switch is closed, the second switch is closed and the third switch is opened, the output is triangular wiring.
Optionally, the control device is configured to obtain a rotation speed signal of the motor, a voltage signal of the generator, and a current signal received by the instrument box; and when the current signal exceeds a preset current threshold value, controlling the first switch in the star-delta switching cabinet to be switched off.
Optionally, the control device is further configured to control the third switch to be closed when the second switch is opened; and controlling the third switch to be switched off when the second switch is switched off.
Optionally, the input power source is a high-voltage commercial power, the motor is a high-voltage motor, and the generator is a high-voltage generator.
Optionally, the generator is a digital generator.
The utility model provides a pair of output power generation facility of variable frequency modulation pressure, include: the system comprises a frequency converter, a motor, a generator and control equipment; the motor is respectively connected with the frequency converter and the generator; the control equipment is respectively connected with the frequency converter, the generator and the motor; the frequency converter is used for connecting an input power supply, receiving a frequency conversion instruction of the control equipment and adjusting output voltage according to the frequency conversion instruction; and the motor is used for moving according to the output voltage so as to output mechanical energy to the generator, so that the generator generates electricity. The control device receives the control instruction, the frequency converter is connected with the control device and the motor respectively to adjust the output frequency of the motor, the motor outputs mechanical energy to the generator, the generator generates electricity, the control device adjusts the output voltage of the generator, wide-range voltage output of different frequencies of the generator is achieved, and control precision of the output voltage of the generator is improved.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are required 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 a schematic structural diagram of a variable-frequency voltage-regulating output power generation device according to an embodiment of the present invention;
fig. 2 is a schematic structural diagram of a variable-frequency voltage-regulating output power generation device according to another embodiment of the present invention;
fig. 3 is a schematic structural diagram of a variable-frequency voltage-regulating output power generation device according to another embodiment of the present invention;
fig. 4 is a schematic view of star-delta switching according to an embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. The components of embodiments of the present invention, as generally described and illustrated in the figures herein, may be arranged and designed in a wide variety of different configurations.
Thus, the following detailed description of the embodiments of the present invention, presented in the accompanying drawings, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.
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.
Furthermore, the appearances of the terms "first," "second," and the like, if any, are used solely to distinguish one from another and are not to be construed as indicating or implying relative importance.
It should be noted that the features of the embodiments of the present invention may be combined with each other without conflict.
In the current generator set combining the motor and the generator, the voltage regulation of the motor generally adopts an analog quantity signal, and the analog quantity signal is influenced by the output impedance of a sending circuit, the resistance value of a cable, electromagnetic interference and the like, so that the voltage regulation signal reaching the generator is inconsistent with the signal at the output end of a controller of the motor, and the error between the output voltage of the generator and the expected voltage is larger.
In order to solve the above problem, an embodiment of the present invention provides a variable frequency voltage-regulating output power generation apparatus, and fig. 1 is the present invention provides a structural schematic diagram of a variable frequency voltage-regulating output power generation apparatus. As shown in fig. 1, the apparatus includes: a frequency converter 1, a motor 2, a generator 3 and a control device 6; the motor 2 is respectively connected with the frequency converter 1 and the generator 3; the control equipment 6 is respectively connected with the frequency converter 1, the generator 3 and the motor 2; the frequency converter 1 is used for connecting an input power supply, receiving a frequency conversion instruction of the control equipment 6 and adjusting output voltage according to the frequency conversion instruction; and the motor 2 is used for moving according to the output voltage so as to output mechanical energy to the generator 3, so that the generator 3 generates electricity.
The frequency converter 1 is used for changing the frequency and amplitude of power supply of the alternating current motor, so that the period of a moving magnetic field of the alternating current motor is changed, and the rotating speed of the motor is smoothly controlled. In the embodiment of the present invention, the input power supply is connected to one end of the frequency converter 1, and the other end is connected to the motor 2 and the control device 6. Specifically, the input power source in the embodiment of the present invention is a three-phase ac power, corresponding to U, V, W in fig. 1. To the setting of the concrete voltage size of input power, the embodiment of the utility model provides a do not restrict.
Exemplarily, in the embodiment of the present invention, the control device 6 implements the control (frequency conversion command) process of the voltage of the motor 2 through the frequency converter 1 as follows: taking the example that the voltage frequency required to be output is 480V and 60HZ, the control device 6 sends control signals (480V and 60HZ) to the frequency converter 1, the voltage to be input by the frequency converter 1 can be 220V and 50HZ, firstly, the input voltage 220 is maintained unchanged, and the voltage frequency is adjusted to 60 HZ; then the motor 2 moves according to the adjusted voltage (220V, 60HZ) to output mechanical energy to the generator 3, so that the generator 3 generates electricity, and finally the control device 6 controls the output voltage of the generator 3 to be adjusted, namely the input voltage is adjusted from 220V to 480V, and finally the required target voltage (480V, 60HZ) is achieved.
It can be understood that, in the embodiment of the present invention, through the adjustment of the output voltage (output voltage range, output voltage frequency) of the generator 3, when the generator 3 supplies power to some loads or devices, the limitation of the voltage magnitude and the voltage frequency of the loads or devices can be avoided, and the power supply range of the generator 3 is expanded.
The control device 6 may remotely control the motor 2 and the generator 3 by remote signals through remote wiring. Therefore, in the embodiment of the present invention, the control device 6 is also called a remote control system.
The embodiment of the utility model provides an output power generation facility of variable frequency voltage regulation, include: the system comprises a frequency converter, a motor, a generator and control equipment; the motor is respectively connected with the frequency converter and the generator; the control equipment is respectively connected with the frequency converter, the generator and the motor; the frequency converter is used for connecting an input power supply, receiving a frequency conversion instruction of the control equipment and adjusting output voltage according to the frequency conversion instruction; and the motor is used for moving according to the output voltage so as to output mechanical energy to the generator, so that the generator generates electricity. The control device receives the control instruction, the frequency converter is connected with the control device and the motor respectively to adjust the output frequency of the motor, the motor outputs mechanical energy to the generator, the generator generates electricity, the control device adjusts the output voltage of the generator, wide-range voltage output of different frequencies of the generator is achieved, and control precision of the output voltage of the generator is improved.
Optionally, the control device 6 is configured to sample an output voltage of the generator 3 and send a voltage control command to the generator 3 according to the output voltage;
and the generator 3 is used for receiving the voltage control instruction sent by the control equipment 6, adjusting the output voltage according to the voltage control instruction, and outputting the adjusted voltage to a connected load.
It should be noted that, in the embodiment of the present invention, a Voltage Regulator (AVR for short) for applying a control command (mainly, a Voltage regulating command) to the generator 3 is present inside the generator 3. AVRs are commonly used in field generators, primarily to regulate the generator output voltage and control the internal field voltage, and are essentially feedback circuits. The embodiment of the utility model provides an in, realize the regulation of target voltage through controlgear 6 and AVR's interaction.
Illustratively, when the target output voltage of the generator 3 is 480V, the control device 6 sends a voltage adjustment command to an AVR inside the generator 3, which controls the voltage output by the generator 3 by controlling the field current inside the generator 3. It should be noted that, in the embodiment of the present invention, there is a corresponding adjustment relationship between the exciting current and the output voltage of the generator 3. That is, when the AVR control excitation current changes, the output voltage also changes accordingly.
It should be noted that the communication between the control device 6 and the AVR inside the generator 3 may be implemented by MODBUS TCP communication. MODBUS TCP combines an Ethernet physical network, a network standard TCP/IP and a data representation method taking MODBUS as an application protocol standard, and MODBUS TCP communication messages are encapsulated in Ethernet TCP/IP data packets.
When the control device 6 controls the voltage of the generator 3, the voltage regulation result of the generator may have a certain error due to interference of some external factors. In order to reduce the influence of error, the embodiment of the utility model provides an in, controlgear 6 still is used for sampling generator 3's output voltage, when generator 3's output voltage and target voltage error are great, finely tunes generator 3's output voltage through the sampling result.
The embodiment of the utility model provides an in, sample the output voltage of generator 3 through controlgear 6 to adjust the output voltage of generator 3 through sampling signal, make controlgear 6 be a closed-loop control mode to generator 3's control, when having avoided utilizing controlgear 6 and AVR to interact alone, the great technical problem of voltage output error of generator 3.
Optionally, the control device 6 is specifically configured to send a voltage control instruction to the generator 3 when the sampled output voltage does not satisfy the preset threshold.
It should be noted that, in the embodiment of the present invention, the magnitude of the output voltage may be completely consistent with the magnitude of the target voltage, and a certain error may also exist. The output voltage is considered to meet the target voltage as long as the error between the output voltage and the target voltage is acceptable within a certain preset threshold range.
Specifically, in the embodiment of the utility model provides an in, carry out the sampling to the output voltage of generator 3 through controlgear 6 to compare with preset target voltage, when output voltage and target voltage's difference satisfied preset threshold value, then control exports the voltage of generator 3. When the difference between the output voltage and the target voltage does not meet the preset threshold, the control device 6 sends a voltage control instruction to the generator 3, and continues to adjust the output voltage of the generator 3 through interaction with the AVR in the generator.
The embodiment of the utility model provides an in, the settlement of predetermineeing the threshold value can be adjusted according to actual demand, exemplarily, predetermine the threshold value and can set up in the target voltage 0.1V within range. The embodiment of the utility model provides a do not do the restriction specifically to the setting of predetermineeing the threshold value.
Optionally, a control device 6, configured to sample a rotation speed of the motor 2 and send a rotation speed adjustment instruction to the motor 2; and the motor 2 is used for receiving the rotating speed adjusting instruction and adjusting the rotating speed according to the rotating speed adjusting instruction.
When the voltage frequency that controlgear 6 exported motor 2 through converter 1 was controlled, there may be the interference of some external factors, consequently, motor 2's output voltage frequency may have certain error, for the influence that reduces the error, the embodiment of the utility model provides an in, controlgear 6 still is used for sampling motor 2's rotational speed signal. Note that there is a certain correspondence relationship between the rotation speed signal of the motor 2 and the frequency of the output voltage of the motor 2. That is, when the rotation speed of the motor 2 is represented by n and the output voltage frequency is represented by f: n is 60 f/p. Where p is the pole pair number of the rotating magnetic field of the motor 2.
In the embodiment of the utility model, utilize controlgear 6 to sample the rotational speed of motor 2, pass through the conversion formula between motor rotational speed and the output voltage frequency with the rotational speed signal of the motor 2 who samples, convert the rotational speed of motor 2 into corresponding output voltage frequency. When the corresponding output voltage frequency converted by the rotation speed of the motor 2 is the same as the preset frequency, the preset condition is satisfied. When the corresponding output voltage frequency converted by the rotating speed of the motor 2 is different from the preset frequency, the rotating speed adjusting instruction is sent to the motor 2 through the frequency converter 1 according to the rotating speed of the motor 2 sampled by the control device 6, and the rotating speed of the motor 2 is adjusted by the motor 2 according to the rotating speed adjusting instruction until the rotating speed signal of the motor 2 sampled by the control device 6 is converted into the corresponding output voltage frequency and reaches the preset requirement.
Fig. 2 is a schematic structural diagram of an output power generation apparatus with variable frequency and voltage regulation according to another embodiment of the present invention. As shown in fig. 2, the apparatus further includes: an instrument box 5; the instrument box 5 is respectively connected with the control device 6, the generator 3 and the motor 2;
the meter box 5 is configured to receive a rotation speed signal of the motor 2, a voltage signal and a current signal of the generator 3, and display the rotation speed signal, the voltage signal and the current signal.
The embodiment of the utility model provides an in, instrument box 5 can carry out real-time demonstration to the rotational speed signal of motor 2, the voltage signal and the current signal of generator 3, and the staff can see out some important information relevant with voltage control through instrument box 5 is audio-visual.
In order to meet different wiring modes of different loads, fixed wiring modes are avoided, such as: star type wiring or triangle-shaped wiring lead to generator 3 can't be for some load power supplies, the embodiment of the utility model provides an output that different wiring modes are realized to the law of connecing through the control generator.
Fig. 3 is a schematic structural diagram of an output power generation apparatus with variable frequency and voltage regulation according to another embodiment of the present invention. As shown in fig. 3, the apparatus further comprises: a star-delta switching cabinet 4; the star-delta switching cabinet 4 includes: the output ends of the first switch QF1 and the second switch QF2 are used for connecting a load; the input ends of the first switch QF1 and the second switch QF2 are used for connecting the generator 3; the third switch QF3 is connected to the input of the generator 3 and the second switch QF 2; when the first switch QF1 is closed, the second switch QF2 is open, and the third switch QF3 is closed, the output is star connection; when the first switch QF1 is closed, the second switch QF2 is closed, and the third switch QF3 is open, the output is triangular wiring, and a star-triangle switching schematic diagram is shown in fig. 4.
In the example of the present invention, the third switch QF3 and the second switch QF2 have an appliance interlock function, and specifically, the third switch and the second switch may be circuit breakers. The electrical interlocking between QF3 and QF2 can ensure that when one breaker is switched on in the operation process of the whole device, the other breaker can be safely and reliably ensured not to be switched on.
It should be noted that, in the embodiment of the present invention, the first switch may also be set as a circuit breaker, and specifically, may also be set as a three-stage circuit breaker.
In order to avoid appearing unusually when the circuit, and make the circuit damage or equipment burn out, the embodiment of the utility model provides an in through the data that acquire in the instrument box 5, monitor the current signal of generator 3.
Optionally, the control device 6 is configured to obtain a rotation speed signal of the motor 2, a voltage signal of the generator 3 and a current signal received by the meter box 5; when the current signal exceeds a preset current threshold value, the first switch QF1 in the star-delta switch cabinet 4 is controlled to be switched off.
It should be noted that, in the embodiment of the present invention, the communication between the control device 6 and the meter box 5 can utilize the RS485 interface on the meter box 5 to transmit the operating parameters of the motor 2 and the generator 3 to the control device 6. When the control device 6 monitors that the current of the generator 3 exceeds a preset threshold, and the time exceeding the preset threshold is maintained for a certain set time, the control device 6 controls the first switch QF1 in the star-delta switching cabinet 4 to be turned off.
It can be understood that, in the present embodiment, the control loop of the power generation device and the operation safety of the load device can be protected to some extent by monitoring the output current of the generator and switching off the first switch QF1 when the output current exceeds a preset threshold.
Optionally, the control device 6 is further configured to control the third switch QF3 to be closed when the second switch QF2 is open; when the second switch QF2 is closed, the third switch QF3 is controlled to be opened.
In some possible implementations, the states of the second switch and the third switch may also be controlled by the control device 6. Specifically, when the control device 6 detects that the second switch QF2 is open, the third switch QF3 is controlled to be closed, and when the control device 6 detects that the second switch QF2 is closed, the third switch QF3 is controlled to be open.
Optionally, the input power source is a high-voltage commercial power, the motor 2 is a high-voltage motor, and the generator 3 is a high-voltage generator.
It should be noted that, in the embodiment of the present invention, the input voltage of the frequency converter 1 is the high-voltage commercial power, and exemplarily, the input voltage may be the high-voltage commercial power of 10.5 KV. The motor 2 and the generator 3 are a high-voltage motor and a high-voltage generator, respectively.
Optionally, the generator 3 is a digital generator.
In the embodiment of the present invention, the generator 3 may specifically be a digital generator. Specifically, in the embodiment of the utility model provides an in, can carry out the control that the generator opened the excitation, the pressure regulating and output voltage through the inside digital AVR of control digital generator.
It can be understood that, in the embodiment of the present invention, the digital generator is adopted to avoid the influence of the output impedance, the cable resistance, the electromagnetic interference, etc. of the sending circuit on the analog signal when the analog signal is adopted. The method has the advantages of strong real-time performance, long transmission distance, strong anti-electromagnetic interference capability and the like.
The embodiment of the utility model provides an output power generation facility of variable frequency pressure regulating receives control command through controlgear to make the converter be connected with controlgear and motor respectively and make the converter adjust the output frequency of motor, export mechanical energy to the generator by the motor, make the generator generate electricity, and adjust the output voltage of generator through controlgear, realized the wide range voltage output of different frequencies, improved generator output voltage's control accuracy.
The above is only the embodiment of the present invention, but the protection scope of the present invention is not limited thereto, and any person skilled in the art can easily think of the changes or substitutions within the technical scope of the present invention, and all should be covered within the protection scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. A variable frequency voltage regulated output power generation apparatus, said apparatus comprising: the system comprises a frequency converter, a motor, a generator and control equipment;
the motor is respectively connected with the frequency converter and the generator; the control equipment is respectively connected with the frequency converter, the generator and the motor;
the frequency converter is used for connecting an input power supply, receiving a frequency conversion instruction of the control equipment and adjusting output voltage according to the frequency conversion instruction;
the motor is used for moving according to the output voltage so as to output mechanical energy to the generator, and the generator generates electricity.
2. The power generation apparatus according to claim 1, wherein the control device is configured to sample an output voltage of the generator and send a voltage control command to the generator according to the output voltage;
and the generator is used for receiving the voltage control instruction sent by the control equipment, adjusting output voltage according to the voltage control instruction and outputting the adjusted voltage to a connected load.
3. The power generation apparatus according to claim 2, wherein the control device is configured to send a voltage control command to the generator when the sampled output voltage does not meet a preset threshold.
4. The power generation apparatus according to claim 1, wherein the control device is configured to sample a rotation speed of the motor and send a rotation speed adjustment instruction to the motor;
and the motor is used for receiving the rotating speed adjusting instruction and adjusting the rotating speed according to the rotating speed adjusting instruction.
5. The power generation apparatus of claim 1, further comprising: an instrument box; the instrument box is respectively connected with the control equipment, the generator and the motor;
the instrument box is used for receiving the rotating speed signal of the motor, the voltage signal and the current signal of the generator and displaying the rotating speed signal, the voltage signal and the current signal.
6. The power generation apparatus of claim 1, further comprising: a star-delta switch cabinet;
the star-delta switch cabinet comprises: the output ends of the first switch and the second switch are used for being connected with a load; the input ends of the first switch and the second switch are used for connecting the generator; the third switch is connected with the input ends of the generator and the second switch; when the first switch is closed, the second switch is opened and the third switch is closed, outputting a star connection; when the first switch is closed, the second switch is closed and the third switch is opened, the output is triangular wiring.
7. The power generation apparatus according to claim 6, wherein the control device is configured to obtain a rotation speed signal of the motor, a voltage signal of the generator, and a current signal received by an instrument box; and when the current signal exceeds a preset current threshold value, controlling the first switch in the star-delta switching cabinet to be switched off.
8. The power generation apparatus of claim 6, wherein the control device is further configured to control the third switch to close when the second switch is open; and controlling the third switch to be switched off when the second switch is switched off.
9. The power generation apparatus of any one of claims 1-8, wherein the input power source is a high voltage utility power, the motor is a high voltage motor, and the generator is a high voltage generator.
10. The power generation apparatus of any of claims 1-8, wherein the generator is a digital generator.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114244206A (en) * | 2021-11-15 | 2022-03-25 | 东方电气风电股份有限公司 | Star-delta conversion operation method of double-fed wind power hydroelectric generating set |
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2020
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114244206A (en) * | 2021-11-15 | 2022-03-25 | 东方电气风电股份有限公司 | Star-delta conversion operation method of double-fed wind power hydroelectric generating set |
| CN114244206B (en) * | 2021-11-15 | 2023-10-20 | 东方电气风电股份有限公司 | Star-delta conversion operation method of doubly-fed wind power hydroelectric generating set |
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