CN113992080A - Starting power generation control method, system and medium capable of actively suppressing harmonic waves - Google Patents
Starting power generation control method, system and medium capable of actively suppressing harmonic waves Download PDFInfo
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- 238000010248 power generation Methods 0.000 title claims abstract description 87
- 238000000034 method Methods 0.000 title claims description 38
- 238000001514 detection method Methods 0.000 claims abstract description 26
- 238000002347 injection Methods 0.000 claims abstract description 20
- 239000007924 injection Substances 0.000 claims abstract description 20
- 239000007858 starting material Substances 0.000 claims description 12
- 230000005284 excitation Effects 0.000 claims description 9
- 230000033228 biological regulation Effects 0.000 claims description 3
- 238000001914 filtration Methods 0.000 description 11
- 238000013461 design Methods 0.000 description 7
- 239000000243 solution Substances 0.000 description 4
- 230000001629 suppression Effects 0.000 description 4
- 238000006243 chemical reaction Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 230000001105 regulatory effect Effects 0.000 description 3
- 230000001276 controlling effect Effects 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000011156 evaluation Methods 0.000 description 2
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- 230000002159 abnormal effect Effects 0.000 description 1
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
- H02P9/00—Arrangements for controlling electric generators for the purpose of obtaining a desired output
- H02P9/08—Control of generator circuit during starting or stopping of driving means, e.g. for initiating excitation
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J3/00—Circuit arrangements for ac mains or ac distribution networks
- H02J3/01—Arrangements for reducing harmonics or ripples
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
- H02P2101/00—Special adaptation of control arrangements for generators
- H02P2101/30—Special adaptation of control arrangements for generators for aircraft
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E40/00—Technologies for an efficient electrical power generation, transmission or distribution
- Y02E40/40—Arrangements for reducing harmonics
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- Power Engineering (AREA)
- Control Of Eletrric Generators (AREA)
Abstract
The present application relates to a starting power generation control system including: a start-up power generation control circuit configured to connect contacts of the starter-generator contactor SGC with contacts of the start-up power circuit during a power generation phase; a signal detection circuit configured to detect harmonics in the power grid during a power generation phase and generate a harmonic detection signal; and a harmonic injection control circuit configured to execute a harmonic injection algorithm in accordance with the harmonic detection signal to drive a starting power circuit to inject an inverse harmonic corresponding to a harmonic in the electrical grid into the electrical grid.
Description
Technical Field
The present application relates to the field of starting power generation system architecture and control, and more particularly to a starting power generation control system and method for an aircraft that can actively suppress harmonics.
Background
The starting/power generation integrated technology has the advantages of effectively reducing the weight of the aircraft, improving the power-mass ratio, improving the reliability, facilitating the integration of the generator and the engine and the like, and is gradually widely applied to civil aircraft. Models such as a350 and B787 have adopted this technique. The starting power circuit used in the starting process of the traditional starting power generation system is in a standby state after the starting of an Auxiliary Power Unit (APU) is completed, and does not play a role in the power generation process of the system. And the quality of the voltage regulating point of the generator is regulated by the voltage regulator in the power generation process, and the harmonic wave of the power grid is not controlled.
As shown in fig. 1, an example architecture of a conventional start-up power generation system environment is shown.
As shown, the example architecture may consist of three parts, an APU starter generator (mainly including a permanent magnet secondary exciter, an ac exciter, a rotating rectifier, and a main generator), a starter power generation system (mainly including a three-phase full-bridge inverter circuit (i.e., a starting power circuit), a dc starting power supply, a signal detection circuit, an excitation power circuit, and a starter power generation control circuit), and an electrical load.
In the starting stage of the starting power generation system, in the process of starting the auxiliary power unit APU, the starting power generation system controls an excitation power circuit and a three-phase full-bridge inverter circuit (namely a starting power circuit) by detecting output voltage and current signals of a main generator, provides excitation current and a three-phase alternating current power supply for the starting process of the motor, and realizes the starting of the motor. During the starting process, contact 1 of APU Generator Contactor (AGC)1And contact 1 of Starter Generator Contactor (SGC)2Are respectively connected with the first disconnection contact 31And contact 3 of three-phase full-bridge inverter circuit2Are connected. That is, in the starting phase, the main generator is connected with the three-phase full-bridge inverter circuit and the direct-current starting power supply to execute the starting process, and meanwhile, the main generator is disconnected from the electrical load and does not supply power to the electrical load.
After the starting is finished, the starting power generation system enters a power generation stage, and the contact 1 of AGC1Contact 2 to an electrical load1Connected to supply power to the electrical load. In the process, the starting power generation control circuit regulates the exciting current according to the detected signal, so that the voltage of the voltage regulating point of the main generator is controlled. Contact 1 of the SGC2And a second disconnection contact 22And the three-phase full-bridge inverter circuit is connected with the main generator, so that the three-phase full-bridge inverter circuit is disconnected with the main generator and is in a standby state. It follows that conventional starting power circuits do not function during system power generation.
In the power generation process, the airplane power grid has strict requirements on harmonic waves, and the increase of the harmonic waves can cause negative effects such as system loss increase, abnormal work of loads and the like. Therefore, the harmonic content of each airborne electric device is often controlled to limit the harmonic in the power grid in the design process of the airplane power supply system, and the normal operation of the airplane is affected once the harmonic exceeds the standard. As the degree of electrification of an airplane is higher and higher, the number and types of electrical equipment in a power grid are increased, and once the harmonic waves of the equipment exceed the standard due to design, the equipment needs to be changed, or at least complex evaluation needs to be carried out to determine whether the harmonic waves affect the power grid, so that the design progress and the design cost are affected. Moreover, for the frequency conversion system, it is difficult to design a passive filter to adapt to the wide frequency variation range of the power grid, so that the current frequency conversion power supply system has no related filtering device.
In 1976, Gyugyi et al proposed an Active Power Filter (APF) formed by controlling a converter with PWM (pulse width modulation), and established the complete concept of active power filtering and the main circuit topology. Since then, the emergence of new power semiconductor devices and the introduction of harmonic instantaneous detection methods based on the instantaneous reactive power theory, active power filtering has developed rapidly. To date, it is still one of the research hotspots in the field of power electronics. The method is applied to civil power grids at present.
The active power filtering technology is less influenced by power grid parameters, and can better adapt to the environment of a variable-frequency alternating-current system compared with a passive filtering scheme. Meanwhile, compared with the PFC which needs to process the whole load power, the APF only processes the harmonic power (possibly including reactive power) of the load, so under the same technical index, the device capacity of the APF is relatively small, and the volume weight is relatively small. At present, relevant technical researches are carried out at home and abroad, and systematic architectures for airplane power grids are not researched.
Gonzalez-Espin proposes a POWER CONVERTER with active POWER filtering (ref: Francisco Gonzalez-Espin, Madrid (ES); Thomas Gietzold, Stratford up Avon (GB). POWER CONVERTER UNIT INCLUDING A RECTIFIER AND AN ACTIVE POWER FILTER (POWER conversion UNIT INCLUDING rectifier and active POWER FILTER), US, CN 10,050,549. B2; 2018.7.14). The patent mainly designs an AC/DC converter, and active filtering is realized by adding APF (active power filter) at an input end, so that harmonic waves generated by the converter are reduced.
However, the above solutions still have the following problems:
1. the starting power circuit in the starting power generation system is in a standby state after the starting function is completed, and is only used when the APU is started in the whole flight process, so that the utilization rate is low.
2. Once the harmonic wave of the power grid exceeds the standard, if the harmonic wave is not treated and compensated, the normal work of a power supply system and electric equipment can be seriously damaged.
3. Once the quality of the electric energy generated by the equipment deviates, deviation evaluation or design change is required, so that the development cost of the system is increased, and the development progress is influenced.
Therefore, there is a need to design a starting power generation control scheme, which can make full use of the resources of the starting power generation system to actively suppress the harmonics in the power grid of the aircraft during the power generation process, so as to ensure the flight safety.
Disclosure of Invention
The present application relates to a starting and power generation control system and method for an aircraft that can actively suppress harmonics.
According to a first aspect of the present application, there is provided a starting power generation control system including: a start-up power generation control circuit configured to connect contacts of the starter-generator contactor SGC with contacts of the start-up power circuit during a power generation phase; a signal detection circuit configured to detect harmonics in the power grid during a power generation phase and generate a harmonic detection signal; and a harmonic injection control circuit configured to execute a harmonic injection algorithm in accordance with the harmonic detection signal to drive a starting power circuit to inject an inverse harmonic corresponding to a harmonic in the electrical grid into the electrical grid.
According to a second aspect of the present application, there is provided a startup power generation control method including: connecting the contact of the starter generator contactor SGC with the contact of a starting power circuit in a power generation stage; detecting harmonics in the power grid at the power generation stage and generating a harmonic detection signal; and executing a harmonic injection algorithm according to the harmonic detection signal to drive a starting power circuit to inject an inverse harmonic corresponding to a harmonic in the power grid into the power grid.
According to a third aspect of the present application, there is provided a computer readable storage medium having stored thereon instructions that, when executed, cause a machine to perform the method of the first aspect.
This summary is provided to introduce a selection of concepts in a simplified form that are further described below in the detailed description. This summary is not intended to identify key features or essential features of the claimed subject matter, nor is it intended to be used to limit the scope of the claimed subject matter.
Drawings
In order to describe the manner in which the above-recited and other advantages and features of the invention can be obtained, a more particular description of the invention briefly described above will be rendered by reference to specific embodiments thereof which are illustrated in the appended drawings. Understanding that these drawings depict only typical embodiments of the invention and are not therefore to be considered to be limiting of its scope, the invention will be described and explained with additional specificity and detail through the use of the accompanying drawings in which:
fig. 1 shows an example architecture of a conventional starting power generation system.
FIG. 2 shows a schematic architecture of a starting power generation control system with active harmonic suppression according to an embodiment of the present application.
FIG. 3 illustrates an example flow diagram of a method for start-up power generation control with active harmonic suppression according to one embodiment of this application.
Detailed Description
The application provides a starting power generation system control scheme capable of actively suppressing harmonic waves, and the scheme can actively eliminate power grid harmonic waves without additionally increasing hardware facilities, is suitable for the current variable frequency power supply system, improves the performance and efficiency of the system, and reduces the risk of system faults.
Specifically, in the scheme of the application, the starting power generation control logic is modified, so that a starting power circuit originally used for starting power generation system control is multiplexed, namely under the power generation condition, the starting power circuit is changed to be used as a parallel active filter from a standby state to inject reversed phase current harmonic waves into a power grid, the current harmonic waves of the power grid are effectively inhibited, the system working efficiency is improved, and the fault risk is reduced. Therefore, a special active power filter does not need to be configured for the power grid, the cost is saved, and the performance and the efficiency are improved.
In fig. 2, a schematic architecture of a starting power generation control system that can actively suppress harmonics according to an embodiment of the present application is shown.
As shown, in this example architecture, the APU starter generator (mainly including the permanent magnet sub-exciter, the ac exciter, the rotating rectifier and the main generator), the starting and power generating system (mainly including the three-phase full-bridge inverter circuit (i.e., the starting power circuit), the dc starting power supply, the signal detection circuit, the exciting power circuit, the starting and power generating control circuit and the harmonic injection control circuit) and the electrical load can be mainly composed of three parts.
The starting power generation control system with the active harmonic suppression function mainly comprises a signal detection circuit, a starting power generation control circuit and a harmonic injection control circuit. The other components are all common components in a conventional starting power generation system.
Unlike the conventional starting power generation control system in fig. 1, the control logic of the starting power generation control circuit in the starting power generation control system of the present application is improved, and a harmonic injection control circuit is also included.
Specifically, in the starting stage of the starting power generation system, in the process of starting the auxiliary power unit APU, the starting power generation system controls the exciter exciting current and the three-phase full-bridge inverter circuit (namely, a starting power circuit) by detecting the output voltage and current signals of the main generator, so as to provide the exciting current and the three-phase alternating current power supply for the starting process of the motor and realize the starting of the motor. During the starting process, contact 1 of APU Generator Contactor (AGC)1And contact 1 of Starter Generator Contactor (SGC)2Are respectively connected with the first disconnection contact 31And contact 3 of three-phase full-bridge inverter circuit2Are connected. That is, in the starting phase, the main generator is connected with the three-phase full-bridge inverter circuit and the direct-current starting power supply to execute the starting process, and meanwhile, the main generator is disconnected from the electrical load and does not supply power to the electrical load. At this stage, the starting power generation control system of the present application is not functionally different from the conventional starting power generation control system.
After the start is finished, the starting power generation system enters a power generation stage, and at the moment, under the control of the starting power generation control circuit, the contact 1 of the AGC1Contact 2 to an electrical load1Connected to enable the main generator to supply power to the electrical load. In the power generation process, the starting and power generation control circuit can control the excitation power circuit to adjust the excitation current according to the voltage signal from the signal detection circuit, and further control the voltage regulation point voltage of the main generator. Meanwhile, unlike the conventional starting power generation control system, the starting power generation control circuit maintains the contact 1 of the SGC at the power generation stage2Contact 3 with three-phase full-bridge inverter circuit2Is connected, not conventionally, to the second disconnection contact 22Are connected. Thus, the three-phase full-bridge inverter circuit is directly connected with the main generator in parallel instead of being disconnected.
At the moment, the signal detection circuit generates corresponding harmonic detection signals by detecting the harmonic in the power grid. The signal is then provided to a harmonic injection control circuit, which is primarily a DSP processor, which may be shared with a conventional starting power generation system controller. The harmonic injection control circuit is provided with a set of harmonic injection control algorithm, and the algorithm can be calculated according to the detected harmonic detection signal of the power grid so as to drive the three-phase full-bridge inverter circuit to inject the inverse harmonic corresponding to the harmonic in the power grid into the power grid, so that the filtering effect is achieved. The algorithm can be realized by utilizing a harmonic injection control algorithm of a traditional power grid, so that under the condition that an active power filter is not required to be additionally configured, the scheme of the application can realize the filtering function by utilizing an originally idle three-phase full-bridge inverter circuit (namely a starting power circuit), the manufacturing cost is saved, the circuit structure is simplified, and the working efficiency is improved.
On the other hand, if the output end of the three-phase full-bridge inverter circuit is short-circuited or the equipment per se fails, the starting power generation control circuit can be started by connecting the contact 1 of the SGC2Is connected to the second disconnection contact 22The connection between the failed three-phase full-bridge inverter circuit and the power grid is cut off, so that the normal operation of the power grid is protected.
In the above example, a three-phase full-bridge inverter circuit is taken as an example of the starting power circuit. It will be understood by those skilled in the art that the foregoing examples have been provided merely for the purpose of explanation and are in no way to be construed as limiting of the present application. An example flowchart of a start-up power generation control method that can actively suppress harmonics during a power generation phase according to an embodiment of the present application is described below with reference to fig. 3. Since the solution of the present application does not differ much from the conventional solution in the starting phase and is not what the present application claims, the solution flow only relates to the operation of the power generation phase after the completion of the starting.
As shown, at the beginning of the generation phase, at step 310, under the control of the start generation control circuit, contact 1 of the AGC1Contact 2 to an electrical load1Are connected so as to enable the masterThe generator is capable of supplying power to an electrical load. This is also the normal operation of a conventional starter generator system.
Subsequently, in step 320, the start-up power generation control circuit may control the excitation power circuit to adjust the excitation current according to the detection signal from the signal detection circuit, so as to control the voltage regulation point voltage of the main generator to meet the demand of the electrical load. This is also the normal operation of a conventional starter generator system.
Meanwhile, at step 330, the start-up generation control circuit is configured to also hold contact 1 of the SGC during this generation phase2Contact 3 with three-phase full-bridge inverter circuit2And the three-phase full-bridge inverter circuit is directly connected with the main generator in parallel. Thus, the three-phase full-bridge inverter circuit can be used for filtering the harmonic waves of the power grid.
At this point, the signal detection circuit generates a corresponding harmonic detection signal by detecting harmonics in the grid, which are then provided to the harmonic injection control circuit, step 340.
Next, in step 350, a harmonic injection control algorithm in the harmonic injection control circuit is executed to drive the three-phase full-bridge inverter circuit to inject inverse harmonics corresponding to the harmonics in the power grid into the power grid according to the detected harmonic detection signal of the power grid, so as to achieve a filtering effect.
The method for controlling starting power generation with active suppression of harmonics ends here.
In a preferred embodiment, the method may further include: if the output end of the three-phase full-bridge inverter circuit is short-circuited or the equipment per se fails, the contact 1 of the SGC can be connected2Is connected to the second disconnection contact 22The connection between the failed three-phase full-bridge inverter circuit and the power grid is cut off, so that the normal operation of the power grid is protected.
It should be understood that many of the steps in the above method flows may be performed substantially simultaneously, and that the order in which they are numbered is for convenience of description only and is not intended to be limiting. For example, steps 310 and 330 may be performed simultaneously.
In summary, according to the scheme of the application, in the power generation stage, the start power control circuit is multiplexed to inject the inverse harmonic into the power grid for harmonic compensation, so that the harmonic content can be controlled within an allowable range, and the safety of the airplane is guaranteed.
While various embodiments have been described above, it should be understood that they have been presented by way of example only, and not limitation. Persons skilled in the relevant art(s) will recognize that various changes may be made in form and detail without departing from the spirit and scope of the invention, as defined by the appended claims. Thus, the breadth and scope of the present invention disclosed herein should not be limited by any of the above-described exemplary embodiments, but should be defined only in accordance with the following claims and their equivalents.
Claims (11)
1. A starting power generation control system comprising:
a start-up power generation control circuit configured to connect contacts of the starter-generator contactor SGC with contacts of the start-up power circuit during a power generation phase;
a signal detection circuit configured to detect harmonics in the power grid during a power generation phase and generate a harmonic detection signal; and
a harmonic injection control circuit configured to execute a harmonic injection algorithm in accordance with the harmonic detection signal to drive the starting power circuit to inject an inverse harmonic corresponding to a harmonic in the electrical grid into the electrical grid.
2. The starting power generation control system according to claim 1, further comprising:
and the excitation power circuit is configured to adjust the excitation current according to the instruction of the starting and power generation control circuit so as to control the voltage regulation point voltage and the starting process of the main generator.
3. The starting power generation control system of claim 1, wherein the starting power generation control circuit is further configured to disconnect the failed starting power circuit from the power grid by connecting contacts of a starter generator contactor to a second disconnect contact when a short circuit occurs at an output of the starting power circuit or the device itself fails, thereby protecting normal operation of the power grid.
4. The starting power generation control system according to claim 1, wherein the harmonic injection algorithm is based on the conventional instantaneous reactive power theory, detects the harmonic current in the power grid, takes the reverse value of the harmonic current as the current control reference, and can generate the starting power circuit driving signal by using the current control algorithms such as current hysteresis control and triangular carrier control to control the starting power circuit to generate the reverse current harmonic.
5. A starting power generation control system of claim 1, wherein the starting power circuit is a three-phase full-bridge inverter circuit.
6. A startup power generation control method comprising:
connecting the contact of the starter generator contactor SGC with the contact of a starting power circuit in a power generation stage;
detecting harmonics in the power grid at the power generation stage and generating a harmonic detection signal; and
executing a harmonic injection algorithm according to the harmonic detection signal to drive a starting power circuit to inject an inverse harmonic corresponding to a harmonic in the power grid into the power grid.
7. The startup power generation control method according to claim 6, characterized by further comprising:
and adjusting the exciting current according to the instruction of the starting power generation control circuit so as to control the voltage of the voltage adjusting point of the main generator.
8. The startup power generation control method according to claim 6, characterized by further comprising:
when the output end of the starting power circuit is short-circuited or the equipment per se fails, the connection between the failed starting power circuit and the power grid is cut off by connecting the contact of the starter generator contactor to the second disconnection contact, so that the normal operation of the power grid is protected.
9. The method for controlling starting power generation according to claim 6, wherein the harmonic injection algorithm is based on the traditional instantaneous reactive power theory, detects the harmonic current in the power grid, takes the reverse value of the harmonic current as the current control reference, and can generate the starting power circuit driving signal by adopting current control algorithms such as current hysteresis control and triangular carrier control, and controls the starting power circuit to generate the reverse current harmonic.
10. A starting power generation control method as claimed in claim 6, wherein the starting power circuit is a three-phase full-bridge inverter circuit.
11. A computer readable storage medium storing instructions that, when executed, cause a machine to perform the startup power generation control method of claims 6-10.
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| CN202111430295.2A CN113992080A (en) | 2021-11-29 | 2021-11-29 | Starting power generation control method, system and medium capable of actively suppressing harmonic waves |
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| CN202111430295.2A CN113992080A (en) | 2021-11-29 | 2021-11-29 | Starting power generation control method, system and medium capable of actively suppressing harmonic waves |
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| WO1999063639A1 (en) * | 1998-06-04 | 1999-12-09 | Aerospatiale Societe Nationale Industrielle | System for compensating harmonics in an electric network |
| US20160134114A1 (en) * | 2013-06-18 | 2016-05-12 | Vestas Wind Systems A/S | Compensating electrical harmonics on the electrical grid |
| WO2018112481A1 (en) * | 2016-12-16 | 2018-06-21 | Ideal Power Inc. | Anti-islanding systems and methods using harmonics injected in a rotation opposite the natural rotation |
| CN108879677A (en) * | 2018-06-08 | 2018-11-23 | 浙江涌原新能科技股份有限公司 | A kind of Intelligent purifying electric net device |
| DE102019119803A1 (en) * | 2018-08-01 | 2020-02-06 | Eaton Intelligent Power Limited | ACTIVE VIBRATION FILTER AND REGENERATION ENERGY CONTROL DEVICE AND OPERATING METHOD |
| CN110912464A (en) * | 2019-12-07 | 2020-03-24 | 陕西航空电气有限责任公司 | Aircraft engine starting controller with active filtering function and starting/electric energy quality control system formed by aircraft engine starting controller |
-
2021
- 2021-11-29 CN CN202111430295.2A patent/CN113992080A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1999063639A1 (en) * | 1998-06-04 | 1999-12-09 | Aerospatiale Societe Nationale Industrielle | System for compensating harmonics in an electric network |
| US20160134114A1 (en) * | 2013-06-18 | 2016-05-12 | Vestas Wind Systems A/S | Compensating electrical harmonics on the electrical grid |
| WO2018112481A1 (en) * | 2016-12-16 | 2018-06-21 | Ideal Power Inc. | Anti-islanding systems and methods using harmonics injected in a rotation opposite the natural rotation |
| CN108879677A (en) * | 2018-06-08 | 2018-11-23 | 浙江涌原新能科技股份有限公司 | A kind of Intelligent purifying electric net device |
| DE102019119803A1 (en) * | 2018-08-01 | 2020-02-06 | Eaton Intelligent Power Limited | ACTIVE VIBRATION FILTER AND REGENERATION ENERGY CONTROL DEVICE AND OPERATING METHOD |
| CN110912464A (en) * | 2019-12-07 | 2020-03-24 | 陕西航空电气有限责任公司 | Aircraft engine starting controller with active filtering function and starting/electric energy quality control system formed by aircraft engine starting controller |
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Application publication date: 20220128 |