CN109217753B - Topological structure of alternating current-direct current power generation system and control method - Google Patents
Topological structure of alternating current-direct current power generation system and control method Download PDFInfo
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- 238000010248 power generation Methods 0.000 title claims abstract description 137
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- 238000011217 control strategy Methods 0.000 claims description 14
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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
- H02P9/14—Arrangements for controlling electric generators for the purpose of obtaining a desired output by variation of field
- H02P9/26—Arrangements for controlling electric generators for the purpose of obtaining a desired output by variation of field using discharge tubes or semiconductor devices
- H02P9/30—Arrangements for controlling electric generators for the purpose of obtaining a desired output by variation of field using discharge tubes or semiconductor devices using semiconductor devices
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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
- H02P9/14—Arrangements for controlling electric generators for the purpose of obtaining a desired output by variation of field
- H02P9/26—Arrangements for controlling electric generators for the purpose of obtaining a desired output by variation of field using discharge tubes or semiconductor devices
- H02P9/30—Arrangements for controlling electric generators for the purpose of obtaining a desired output by variation of field using discharge tubes or semiconductor devices using semiconductor devices
- H02P9/305—Arrangements for controlling electric generators for the purpose of obtaining a desired output by variation of field using discharge tubes or semiconductor devices using semiconductor devices controlling voltage
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Abstract
The invention discloses a topological structure and a control method of an alternating current-direct current power generation system, belongs to the technical field of power generation, power transformation or power distribution, and is particularly suitable for occasions needing direct current electric energy and alternating current electric energy of different voltage grades. The power generation system is composed of a star-open combined double-winding multi-port generator, the generator adopts two sets of stator windings, one set of the generator is in an open winding structure, the output ends of two sides of the generator are respectively connected with a power generation driving unit, and the output ends of the two power generation driving units are connected in series to form a three-wire system bipolar bus, namely a positive bus, a negative bus and a ground wire; the other set of windings directly outputs three-phase alternating current electric energy, so that a multi-port alternating current and direct current power generation system is formed, the defects of single power supply form and single direct current power supply voltage grade in a micro-grid and a multi-power airplane are overcome, and the requirements of direct current loads of different voltage grades and load diversification in the airplane and the micro-grid can be met.
Description
Technical Field
The invention discloses a topological structure and a control method of an alternating current-direct current power generation system, belongs to the technical field of power generation, power transformation or power distribution, and is particularly suitable for occasions needing direct current electric energy and alternating current electric energy of different voltage grades.
Background
With the increasing severity of global energy crisis, environmental pollution and other problems, distributed power supplies such as photovoltaic power, wind power and the like are more and more concerned by people due to the advantages of being renewable, clean and the like, and a development trend is toward the adoption of a micro-grid to realize the access of new energy to a main grid. At present, the microgrid is mainly divided into a direct current microgrid and an alternating current microgrid, and the direct current microgrid generally has two power supply situations of unipolar power supply and bipolar power supply. Compared with a unipolar direct-current microgrid, the bipolar direct-current microgrid has two voltage levels, the utilization rate of a direct-current power supply system can be effectively improved, and the access requirements of distributed power supplies, energy storage systems and loads with different voltage levels are met. In the ac/dc hybrid microgrid, due to the diversity of loads, a power generation system of the microgrid is required to have the capability of simultaneously generating ac electric energy and dc electric energy, and an ac motor and a dc motor are often required to form an ac power generation system and a dc power generation system which are independent of each other, and most generators only have a single electric energy output port.
Similar to the ac/dc hybrid micro grid, the power system of the multi-electric/all-electric aircraft also requires the power generation system to have the capability of simultaneously outputting ac and dc power. At present, a high-voltage direct-current power supply system and a variable-frequency alternating-current power supply system are two major development trends of a multi-electric/full-electric airplane power supply system. Compared with an alternating current power supply system, the high-voltage direct current power supply system has better dynamic performance, can realize uninterrupted power supply and redundant power supply more easily, and becomes the first choice of a military fighter. The variable frequency alternating current power supply system is widely applied to large-sized airplanes due to the advantages of simple structure, high efficiency, high power density and the like. In a large aircraft, there are not only ac loads that use more than half of the total power capacity of the aircraft, such as heating and deicing, but also dc loads such as electronic devices and electric actuators. In addition, the dc loads have different voltage levels due to their various types. Therefore, the power generation system in the airplane power supply is provided with a high-voltage direct-current power output port added through the power conversion device besides a variable-frequency alternating-current power output port, and the direct-current bus also adopts a bipolar power supply form.
In view of the current state of research on micro-grid and multi-electric/full-electric aircraft power systems in China, in order to enable a power generation system to have a plurality of power output ports, or to adopt a plurality of generators or add an electric energy conversion device, the methods all increase the complexity of the system. With the rapid development of micro-grid and multi-electric/full-electric aircraft technologies, electrical loads tend to be diversified, which requires that a power generation system can simultaneously have a plurality of and various electric energy output ports on one generator, and not only supplies power to an alternating current load, but also supplies power to direct current loads with different voltage levels. From the existing research, the research on a new topological structure of a multi-port alternating current-direct current power generation system for a micro-grid and a multi-electric airplane is not related in China.
Disclosure of Invention
The invention aims to provide a topological structure of an alternating current and direct current power generation system and a control method thereof, aiming at the defects of the background technology, so that multi-port alternating current and direct current power generation is realized, and the technical problem that the conventional alternating current and direct current power generation system cannot simultaneously meet the requirements of alternating current power generation and multi-voltage-level direct current power generation is solved.
The invention adopts the following technical scheme for realizing the aim of the invention:
the topological structure of alternating current-direct current power generation system includes: the star-open combined type double-winding multi-port generator comprises a star-open combined type double-winding multi-port generator, a first generating drive unit, a second generating drive unit, a first direct current port, a second direct current port, a third direct current port, an alternating current port, a first filter inductor, a second filter inductor, an excitation capacitor, a first circuit breaker, a second circuit breaker, a third circuit breaker, a fourth circuit breaker, a fifth circuit breaker, a sixth circuit breaker, an alternating current voltage sensor, a first direct current voltage sensor, a second direct current voltage sensor, a drive circuit and a digital signal processor.
The stator of the star-open combined double-winding multi-port generator is provided with two sets of windings, wherein one set of windings are connected in an open mode and provided with two power output ports; the other set of windings is in star connection and is provided with a power output port.
One end of an open winding of the star-open combined type double-winding multi-port generator is connected with one end of a first filter inductor, the other end of the first filter inductor is connected with an alternating current power output end of a first power generation driving unit through a first circuit breaker, the other end of the open winding of the star-open combined type double-winding multi-port generator is connected with one end of a second filter inductor, the other end of the second filter inductor is connected with an alternating current power output end of a second power generation driving unit through a second circuit breaker, an outgoing line of a star-shaped connecting winding of the star-open combined type double-winding multi-port generator is connected with an excitation capacitor in parallel, and an outgoing line of the star-shaped connecting winding of the star-open combined type double-winding.
The direct current power output end of the first power generation driving unit is connected with the first direct current port through a third circuit breaker, the direct current power output end of the second power generation driving unit is connected with the second direct current port through a fourth circuit breaker, the negative pole of the direct current power output end of the first power generation driving unit is connected with the positive pole of the direct current power output end of the second power generation driving unit in series and connected with the ground, the positive pole of the direct current power output end of the first power generation driving unit is connected with the negative pole of the direct current power output end of the second power generation driving unit through a fifth circuit breaker and connected with the third direct current port, and a bipolar direct current bus, namely a positive bus, a negative bus and a ground wire, is formed.
The power generation drive unit includes: the device comprises an auxiliary power supply, a diode, a capacitor and a converter, wherein the anode of the auxiliary power supply is connected with the anode of the diode, the cathode of the diode and the positive plate of the capacitor are connected with the anode of the direct-current power output end of the converter, and the cathode of the auxiliary power supply and the negative plate of the capacitor are connected with the cathode of the direct-current power output end of the converter. The number of bridge arms contained in each converter is the same as the number of phases of the star-open combined type double-winding multiport generator, and each bridge arm consists of two switching tubes connected in series. And a reverse diode is connected between the two ends of the switching tube.
The control method comprises the following steps: the method comprises the steps that a first direct-current voltage sensor is used for detecting direct-current voltage of a first direct-current port in real time, a second direct-current voltage sensor is used for detecting direct-current voltage of a second direct-current port in real time, a digital signal processor generates instructions of a control strategy according to the alternating-current voltage of the alternating-current port, the direct-current voltage of the first direct-current port and the direct-current voltage of the second direct-current port respectively, a driving circuit which takes an output instruction of the digital signal processor as an input signal generates driving signals of a first power generation driving unit and a second power generation driving unit, and the first power generation driving unit and the second power generation driving unit output excitation reactive power and active power under the action of the driving signals.
The control strategy specifically comprises the following steps:
the control strategy of the power generation voltage building stage is as follows: the digital signal processor controls the first circuit breaker and the second circuit breaker to keep a closing state, the third circuit breaker to the sixth circuit breaker keep opening, the first power generation driving unit outputs excitation reactive power which is enough to ensure that the star-open combined type double-winding multi-port generator can ensure that the first double-winding asynchronous motor can reliably build voltage through the first circuit breaker and the second power generation driving unit through the second circuit breaker, the starting power generation driving unit outputs excitation reactive power which is enough to ensure that the second double-winding asynchronous motor can reliably build voltage through the third circuit breaker to the second double-winding asynchronous motor unit, and the star-open combined type double-winding multi-port generator runs in a power generation state,
control strategy for stable power generation stage: the digital signal processor controls the first to sixth circuit breakers to keep a closing state, the output end of the first power generation driving unit connected with the first circuit breaker and the output end of the second power generation driving unit connected with the second circuit breaker output excitation reactive power and active power which enable the star-type-open combined type double-winding multi-port generator to operate in a stable power generation state, the digital signal processor generates a control strategy instruction according to an alternating voltage signal detected by an alternating voltage sensor in real time, the digital signal processor outputs the instruction as a driving circuit of an input signal to generate and distribute driving signals of the first power generation driving unit and the second power generation driving unit, the alternating current power output end of the first power generation driving unit outputs excitation reactive power to two ends of an open winding of the star-type-open combined type double-winding multi-port generator through the first circuit breaker and the alternating current power output end of the second power generation driving unit through the second circuit breaker, the star winding of the star-open combined type double-winding multi-port generator outputs target alternating current, a digital signal processor generates a control strategy instruction according to direct current voltage signals detected by a first direct current voltage sensor and a second direct current voltage sensor in real time, a driving circuit which takes the digital signal processor output instruction as an input signal generates and distributes driving signals of a first power generation driving unit and a second power generation driving unit, an alternating current power output end of the first power generation driving unit outputs active power to two ends of the open winding of the star-open combined type double-winding multi-port generator through a first circuit breaker and an alternating current power output end of the second power generation driving unit through a second circuit breaker, and one end of the open winding of the star-open combined type double-winding multi-port generator outputs positive-polarity direct current with a target amplitude to the positive-polarity bus of a first direct current port through the first circuit breaker, the first power generation driving unit and a third And the other end of the open winding of the star-open combined double-winding multi-port generator outputs negative direct current with a target amplitude to the ground through a second circuit breaker, a second power generation driving unit and a fourth circuit breaker.
By adopting the technical scheme, the invention has the following beneficial effects:
(1) the star-open combined double-winding multi-port generator is applied to the micro-grid and the multi-electric-plane, so that electric energy can be simultaneously output from a plurality of ports of one generator of the micro-grid and the multi-electric-plane, the defect that the output electric energy port of the generator is single in a power generation system of the micro-grid and the multi-electric-plane is overcome, and the requirements of the micro-grid and the multi-electric-plane for a plurality of power utilization ports can be met.
(2) The star-open combined double-winding multi-port generator can simultaneously generate direct current electric energy and alternating current electric energy, wherein the direct current buses of two converters are connected in series to form a three-wire bipolar direct current bus, namely a positive bus, a negative bus and a ground wire, so that 1/2 times of direct current voltage, -1/2 times of direct current voltage and 1 time of direct current voltage can be simultaneously output, the power supply requirements of different types of loads are met, and the star-open combined double-winding multi-port generator can be suitable for direct current loads of different voltage grades.
Drawings
FIG. 1 is a topological structure of a multi-port generator AC/DC power generation system.
Fig. 2 is a circuit diagram of the power generation driving unit.
The reference numbers in the figures illustrate: 1. star-open combined double-winding multiport generator, 2, a first generator drive unit, 3, a second generator drive unit, 4, a first dc port, 5, a second dc port, 6, a third dc port, 7, an ac port, 8, a first filter inductance, 9, a second filter inductance, 10, an excitation capacitance, 11, a first circuit breaker, 12, a second circuit breaker, 13, a third circuit breaker, 14, a fourth circuit breaker, 15, a fifth circuit breaker, 16, a sixth circuit breaker, 17, an ac voltage sensor, 18, a first dc voltage sensor, 19, a second dc voltage sensor, 20, a drive circuit, 21, a digital signal processor, S1, a first switch, S2, a second switch, S3, a third switch, S4, a fourth switch, S5, a fifth switch, S6, a sixth switch, P, an auxiliary power supply, D, a diode, C. and (4) a capacitor.
Detailed Description
The technical scheme of the invention is explained in detail in the following with reference to the attached drawings.
As shown in fig. 1, the ac/dc power generation system includes: the generator comprises a star-open combined double-winding multi-port generator 1, a first generator driving unit 2, a second generator driving unit 3, a first direct current port 4, a second direct current port 5, a third direct current port 6, an alternating current port 7, a first filter inductor 8, a second filter inductor 9, an excitation capacitor 10, a first circuit breaker 11, a second circuit breaker 12, a third circuit breaker 13, a fourth circuit breaker 14, a fifth circuit breaker 15 and a sixth circuit breaker 16.
The stator of the star-open combined double-winding multiport generator is provided with two sets of windings, and one set of windings are connected in an open mode and are provided with two power output ports; the other set of windings is connected in a star shape and is provided with a power output port. One end of an open winding of the star-open combined type double-winding multiport generator 1 is connected with one end of a first filter inductor 8, the other end of the first filter inductor 8 is connected with an alternating current power output end of a first power generation driving unit 2 through a first circuit breaker 11, the other end of the open winding of the star-open combined type double-winding multiport generator 1 is connected with one end of a second filter inductor 9, the other end of the second filter inductor 9 is connected with an alternating current power output end of a second power generation driving unit 3 through a second circuit breaker 12, an outgoing line of a star-shaped connecting winding of the star-open combined type double-winding multiport generator 1 is connected with an excitation capacitor 10 in parallel, and an outgoing line of a star-shaped connecting winding of the star-open combined type double-winding multiport generator 1 is connected.
The direct current power output end of the first power generation driving unit 2 is connected with the first direct current port 4 through a third circuit breaker 13, the direct current power output end of the second power generation driving unit 3 is connected with the second direct current port 5 through a fourth circuit breaker 14, the negative pole of the direct current power output end of the first power generation driving unit 2 is connected with the positive pole of the direct current power output end of the second power generation driving unit 3 in series and is connected with the ground, the positive pole of the direct current power output end of the first power generation driving unit 2 is connected with the negative pole of the direct current power output end of the second power generation driving unit 3 through a fifth circuit breaker 15 and the third direct current port, and a bipolar direct current bus, namely a positive bus, a negative bus and a ground wire, is formed.
As shown in fig. 2, the power generation drive unit includes: an inverter consisting of a first switch S1, a second switch S2, a third switch S3, a fourth switch S4, a fifth switch S5 and a sixth switch S6, an auxiliary power supply P, a diode D and a capacitor C. The first switch S1 and the second switch S2 which are connected in series form a bridge arm, the third switch S3 and the fourth switch S4 which are connected in series form a bridge arm, and the fifth switch S5 and the sixth switch S6 which are connected in series form a bridge arm. The three bridge arms are connected in parallel, and the capacitor C, the auxiliary power supply P and the serial branch of the diode D are connected in parallel at the direct current output side of the converter to form a power generation driving unit. a. b and c, one side alternating current output terminal of the power generation driving unit is led out from three connection points, and G, N, the other side direct current output terminal of the power generation driving unit is led out from two connection points. The power generation driving unit has the functions of providing excitation reactive power for the multi-port generator and outputting direct current active power.
In the system shown in fig. 1, the star-open combined double-winding multiport generator adopts the motors with other numbers of phases of the windings in open connection, and correspondingly, the number of the phases of the converter is the same as that of the windings in open connection of the star-open combined double-winding multiport generator.
The control method of the topology structure shown in fig. 1 is implemented by an alternating voltage sensor 16 on the star winding outgoing line of a star-open combined double-winding multiport generator 1, a first direct voltage sensor 18 for detecting the voltage of the direct current power output end of a first power generation driving unit 2, a second direct voltage sensor 19 for detecting the voltage of the direct current power output end of a second power generation driving unit 3, a digital signal processor 21 for receiving the detection data of the alternating voltage sensor and the two direct voltage sensors and then outputting a control strategy instruction, and a driving signal driving circuit 20 for receiving the control strategy instruction and then generating a driving signal of the first power generation driving unit and a driving signal of the second power generation driving unit. The alternating current voltage sensor 17 detects the alternating current voltage of the alternating current port 7 in real time, the first direct current voltage sensor 18 detects the direct current voltage of the first direct current port 4 in real time, the second direct current voltage sensor 19 detects the direct current voltage of the second direct current port 5 in real time, the digital signal processor 21 generates a command of a control strategy according to the alternating current voltage of the alternating current port, the direct current voltage of the first direct current port and the direct current voltage of the second direct current port, the driving circuit 20 which takes the digital signal processor output command as an input signal generates driving signals of the first power generation driving unit 2 and the second power generation driving unit 3, and the first power generation driving unit 2 and the second power generation driving unit 3 output excitation reactive power and active power under the action of the driving signals.
The specific process of the digital signal processor for generating the control strategy instruction comprises the following steps:
the control strategy of the power generation voltage building stage is as follows: the digital signal processor 21 controls the first circuit breaker 11 and the second circuit breaker 12 to keep a closing state, the third circuit breaker 13 to the sixth circuit breaker 16 keep opening, the first power generation driving unit 2 outputs excitation reactive power which is enough to enable the star-type-open combined double-winding multiport generator 1 to reliably build voltage through the first circuit breaker 11 and the second power generation driving unit 3 through the second circuit breaker 12, the star-type-open combined double-winding multiport generator operates in a power generation state,
control strategy for stable power generation stage: the digital signal processor 21 controls the first circuit breaker 11 to the sixth circuit breaker 16 to keep a closing state, the alternating current power output end of the first power generation driving unit 2 and the alternating current power output end of the second power generation driving unit 3 output excitation reactive power and active power which enable the star-type-open combined double-winding multi-port generator 1 to operate in a stable power generation state, the digital signal processor 21 generates a control instruction of target alternating current according to an alternating voltage signal detected by an alternating voltage sensor in real time, the driving circuit 20 which takes the target alternating current control instruction as an input signal generates and distributes reactive power driving signals of the first power generation driving unit 2 and the second power generation driving unit 3, the alternating current power output end of the first power generation driving unit 2 outputs excitation non-reactive driving signals to two ends of an open winding of the star-open combined double-winding multi-port generator 1 through the first circuit breaker 11 and the alternating current power output end of the second power generation driving unit 3 through the second The active power is that the star winding of the star-open combined double-winding multi-port generator 1 outputs target alternating current, the digital signal processor 21 generates a control instruction of target direct current according to direct current voltage signals detected by the first direct current voltage sensor 18 and the second direct current voltage sensor 19 in real time, the driving circuit 20 which takes the direct current control instruction as an input signal generates and distributes active driving signals of the first power generation driving unit and the second power generation driving unit, the alternating current power output end of the first power generation driving unit 2 outputs active power to the two ends of the open winding of the star-open combined double-winding multi-port generator 1 through the first circuit breaker 11 and the alternating current power output end of the second power generation driving unit 3 through the second circuit breaker 12, and one end of the open winding of the star-open combined double-winding multi-port generator 1 is connected through the first circuit breaker 11, The first power generation driving unit 2 and the third circuit breaker 13 output positive-polarity direct current with target amplitude to the positive-polarity bus of the first direct current port 4 to the ground, and the other end of the open winding of the star-open combined double-winding multi-port generator 1 outputs negative-polarity direct current with target amplitude to the negative-polarity bus of the second direct current port 5 to the ground through the second circuit breaker 12, the second power generation driving unit 3 and the fourth circuit breaker 14.
The star-open combined double-winding multi-port generator alternating current and direct current power generation system shown in fig. 1 is adopted to realize the function of multi-port output electric energy and simultaneous alternating current and direct current power generation. The star-open combined double-winding multi-port generator adopts one side output end of open-connected windings to output direct current through a circuit breaker by a power generation driving unit, and adopts the other side output end of the open-connected windings to output direct current through another power generation driving unit by the circuit breaker. The positive pole of the direct current output terminal of one power generation driving unit and the negative pole of the direct current output terminal of the other power generation driving unit output direct current through the circuit breaker. The multi-port generator adopts star-connected windings to output alternating current through a circuit breaker.
Claims (7)
1. A topology structure of an AC/DC power generation system, comprising: the double-winding generator comprises an open winding, a first power generation driving unit and a second power generation driving unit, wherein outgoing lines on two sides of the open winding of the double-winding generator are respectively connected with an alternating current power output end of the first power generation driving unit and an alternating current power output end of the second power generation driving unit, a direct current side negative bus of the first power generation driving unit and a direct current side positive bus of the second power generation driving unit are connected in parallel and then are grounded, a direct current side positive bus of the first power generation driving unit and a parallel connection point of the direct current side buses of the two power generation driving units form a first direct current output port, a parallel connection point of the direct current side buses of the two power generation driving units and a direct current side negative bus of the second power generation driving unit form a second direct current output port, and a direct current side positive bus of the first power generation driving unit and a direct current side negative bus of, and the winding on the other side of the double-winding generator outputs alternating current.
2. The topology of claim 1, wherein the stator of the open-winding, double-winding generator has two sets of windings, one set of windings is an open-winding with two power output ports, and the other set of windings is a star-winding with one power output port.
3. The topology structure of ac/dc power generation system according to claim 1, wherein the outgoing line from one side of the open winding of the dual-winding generator is connected to the ac power output terminal of the first power generation driving unit after passing through the first filter inductor and the first circuit breaker, and the outgoing line from the other side of the open winding of the dual-winding generator is connected to the ac power output terminal of the second power generation driving unit after passing through the second filter inductor and the second circuit breaker.
4. The topology structure of ac/dc power generation system according to claim 1, wherein a junction point of the first dc-side positive bus of the power generation driving unit and the two dc-side buses of the power generation driving unit outputs a dc with a first target amplitude through a third circuit breaker, a junction point of the two dc-side buses of the power generation driving unit and the second dc-side negative bus of the power generation driving unit outputs a dc with a second target amplitude through a fourth circuit breaker, and the first dc-side positive bus of the power generation driving unit and the second dc-side negative bus of the power generation driving unit output a dc with a third target amplitude through a fifth circuit breaker.
5. The topological structure of the alternating current-direct current power generation system according to claim 1, wherein an excitation capacitor and a sixth circuit breaker are connected to an outgoing line of a winding on the other side of the double-winding generator.
6. The topology of claim 1, wherein the first power generation driving unit and the second power generation driving unit have the same circuit structure, and each of the first power generation driving unit and the second power generation driving unit comprises: the middle point of a bridge arm of the converter is connected with an outlet wire at one side of the open winding, a positive plate of the capacitor and a cathode of the diode are connected with a positive bus at the direct current side of the converter, a positive electrode of the auxiliary power supply is connected with an anode of the diode, and a negative electrode of the auxiliary power supply and a negative plate of the capacitor are connected with a negative bus at the direct current side of the converter.
7. The method according to any one of claims 1 to 6, wherein the method is implemented by an ac voltage sensor for detecting an ac voltage on an outgoing line of a winding on the other side of the dual-winding generator, a first dc voltage sensor for detecting a dc power output terminal voltage of the first generator driving unit, a second dc voltage sensor for detecting a dc power output terminal voltage of the second generator driving unit, a digital signal processor for receiving detection data of the ac voltage sensor and the two dc voltage sensors and outputting a control strategy command, and a driving circuit for receiving the control strategy command and generating driving signals of the first generator driving unit and the second generator driving unit, and specifically comprises the following steps:
in the power generation voltage-building stage, the AC power output sides of the first power generation driving unit and the second power generation driving unit output exciting reactive power which is enough to enable the double-winding power generator to carry out reliable voltage building,
and in the stable power generation stage, a strategy instruction for controlling reactive power output and active power output of the alternating current power output ends of the two power generation driving units is adjusted according to alternating current voltage signals detected by the alternating current voltage sensors in real time and direct current voltage signals detected by the two direct current voltage sensors in real time until a winding on the other side of the double-winding generator outputs target alternating current, a first direct current output port outputs positive polarity direct current of a target amplitude, and a second direct current output port outputs negative polarity direct current of the target amplitude.
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| CN110729929B (en) * | 2019-10-21 | 2021-03-02 | 南京航空航天大学 | Double-winding permanent magnet motor starting power generation system and fault-tolerant control method thereof |
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