CN106936281B - The excitation unit of AC exciter - Google Patents
The excitation unit of AC exciter Download PDFInfo
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- CN106936281B CN106936281B CN201511026920.1A CN201511026920A CN106936281B CN 106936281 B CN106936281 B CN 106936281B CN 201511026920 A CN201511026920 A CN 201511026920A CN 106936281 B CN106936281 B CN 106936281B
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K19/00—Synchronous motors or generators
- H02K19/16—Synchronous generators
- H02K19/26—Synchronous generators characterised by the arrangement of exciting windings
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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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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Control Of Eletrric Generators (AREA)
Abstract
The present invention relates to the excitation units of AC exciter.Gas-turbine electricity generation system includes: gas-turbine；The main generator being connected with the rotor of gas-turbine by shaft；The rotating rectifier that three-phase alternating current is converted into DC current and is powered to the excitation winding of main generator；It is made of armature winding and d axis excitation winding and q axis with excitation winding and the three-phase alternating current that is issued armature winding is energized to the AC exciter of rotating rectifier；The excitation unit that AC exciter is driven in main generator starting；And electric current is provided to the field power supply of excitation unit.Excitation unit is made of 2 single-phase inverters, therefore the movement of energy quick-response excitation device, or on startup, in low speed rotation can also excitation be formed to the excitation winding of main generator, and when normal, identical excitation unit also is used to excitation, so as to simplify circuit.
Description
Technical field
The present invention relates to the excitations of the AC exciter for starting the power generator being made of gas-turbine and generator
Device.
Background technique
In recent years, from environmental protection aspect, it is desirable that generating equipment is efficient, therefore, utilizes gas-turbine (GT)
Combination circulating generation increased.Under the background of this trend, gas-turbine just gradually becomes with large capacity.
Combustion air is compressed and is sent into burner by rotary compressor by gas-turbine, and fuel is blown into burner
And make its burning, turbine is rotated using the high temperature and pressure burning gases generated at this time.Turbine wheel shaft is directly connected to compressor,
To compressor transmitting compression power and continuous operation.Therefore, gas-turbine start when, need using starting motor etc. come
The biggish compressor of the moment of resistance and generator are driven, until gas-turbine is lighted and reaches the revolving speed that can voluntarily run.
Due to such case, the mode for starting gas-turbine as follows increasingly increases: its use can shorten shaft size
Variable-ratio DC-to-AC converter to carry out frequency conversion to source power supply, and generator is itself served as synchronous motor to start gas
Body turbine, which do not need the high capacity according to generating equipment and become larger-size starting motor and torque change
Voltage decline will not occur because of the starting current of motor for parallel operation, indoor power supply.
At this time, it may be necessary to the excitation winding of starting motor be powered hundreds of Amps exciting current until from rotation
Until revolving speed (several beats/min) reaches rated speed, but in common AC exciter mode especially in brushless excitation mode,
There are the following problems in the lower region of revolving speed as several beats/min: it is smaller that the exchange of AC exciter generates voltage, can not
Carry out sufficient excitation.Therefore, silicon controlled excitation is generally used, which utilizes collector ring, and no matter how equal revolving speed is
Excitation can be carried out to excitation winding.
AC exciter used in brushless excitation mode makes current flow through excitation winding to generate magnetic flux, straight by shaft
The armature winding for being connected to the AC exciter of the excitation winding of generator in succession interlinks with the magnetic flux, to generate power generation institute
The exciting power needed.In the case that AC exciter is synchronous machine, the voltage for being applied to the excitation winding generally uses direct current, but
As AC exciter application three-phase windings type induction machine and the excitation winding of primary side is applied into exchange as three-phase windings
Voltage, to generate alternating voltage in secondary side.By carrying out this excitation, can be opened using variable-ratio DC-to-AC converter
It is dynamic, this in previous brushless excitation mode (such as patent document 1) relatively difficult to achieve.
Existing technical literature
Patent document
Patent document 1: Japanese Patent Laid-Open 2003-143899 bulletin
Summary of the invention
Problem to be solved by the invention
Figure 21 is the circuit structure diagram of the turbogenerator with previous brushless exciter, and three-phase induction machine is used as
For AC exciter, gas-turbine power generator can be started using variable-ratio DC-to-AC converter.When starting, rotation is utilized
The three-phase alternating voltage that armature winding 11 generates is rectified into direct current by the diode of rectifier 12.The direct current of the rotating rectifier 12
Terminal is connected in rotor 4 with the field winding 21 of main generator 2, and the excitation winding 21 of main generator 2, which becomes, to be had centainly
The rotor 4 of the magnetic pole in direction.Therefore, the armature winding 22 of main generator 2 is connected with starting variable-ratio DC-to-AC converter 23
It connects, indoor power supply 71 is generated into variable-ratio power supply as input, the armature winding 22 of main generator 2 is made to generate rotating excitation field simultaneously
From the slow raising speed of low frequency, then no setting is required it is other it is special accelerate to use motor, can be using main generator as synchronous generator
Starting.
In addition, excitation is with rectifier 43 by the alternating voltage of permanent magnet generator (PMG) 40 after starting and when operating normally
As power supply, by AC rectification it is direct current using silicon controlled rectifier, direct current is carried out to the excitation winding 18 of AC exciter 9 and is encouraged
Magnetic is to generate three-phase alternating voltage in armature winding 11, in the same manner as when starting, becomes direct current, electricity in rotating rectifier 12
Stream flows through the excitation winding 21 of main generator 2, and the armature winding 22 of main generator 2 generates voltage and synchronizes and be incorporated to system later
Power supply 72.
However, being started in the excitation unit of existing AC exciter using variable-ratio DC-to-AC converter
When, need to establish the excitation of the excitation winding of main generator.Therefore, on startup, to the AC excitation of application three-phase induction machine
The excitation winding of machine carries out AC excitation, later, because gas-turbine voluntarily run thus at the time of reaching near rated speed,
It needs to carry out DC excitation.Therefore, as the excitation unit of AC exciter, the three-phase current adjuster and crystalline substance that need to start
The device of the excitation reorganizer used after brake tube and starting, in addition, for the excitation winding of AC exciter, exchange is encouraged
The contactor of magnetic and to switch to the switching of DC excitation reorganizer with contactor be necessary, therefore there are output circuit tools
There is the problem of labyrinth.
The present invention completes to solve the above-mentioned problems, its object is to obtain a kind of excitation unit of AC exciter,
In the excitation of AC exciter, flexibly with collector ring or the brushless excitation side of brush for not needing for direct current to be supplied to rotor
The speciality of formula generator, and gas-turbine can be started using variable-ratio DC-to-AC converter, and structure is simple.
Technical teaching for solving the problem was
To solve the above-mentioned problems, the excitation unit of AC exciter according to the present invention is characterised by comprising list
Phase inverter, the single-phase inverter provide AC exciter, that is, synchronous machine excitation winding with 2 axis excitation windings respectively
Electric current, and be made of switch element, in the case where AC excitation, so that single-phase inverter is carried out inversion actions, in DC excitation
In the case where, so that single-phase inverter is carried out copped wave movement, provides exciting power to generator using synchronous machine.
Invention effect
The excitation unit of AC exciter according to the present invention, excitation unit are made of 2 single-phase inverters, therefore, with
Existing current regulator compares the movement for having the effect that energy quick-response excitation device, in addition, on startup, even if
Can also excitation be formed to the excitation winding of main generator in low speed rotation, and when normal, identical excitation is used to excitation
Device, so as to simplify circuit.
Detailed description of the invention
Fig. 1 shows the gas-turbine being made of the AC exciter including excitation unit involved in embodiment 1 hairs
The structure chart of electric system.
Fig. 2 indicates the circuit diagram of the single-phase inverter of excitation unit involved in embodiment 1.
Fig. 3 is the list that excitation winding is connected in the AC excitation movement for indicate excitation unit involved in embodiment 1
The circuit diagram of the movement of phase inverter.
Fig. 4 is the inversion actions indicated using the single-phase inverter of PWM waveform production method (when high pressure) in embodiment 1
With the figure of output waveform.
Fig. 5 is the inversion actions indicated using the single-phase inverter of PWM waveform production method (when low pressure) in embodiment 1
With the figure of output waveform.
Fig. 6 is the movement of the single-phase inverter in the DC excitation movement for indicate excitation unit involved in embodiment 1
Circuit diagram.
Fig. 7 is the output of the single-phase inverter in the DC excitation movement for indicate excitation unit involved in embodiment 1
The figure of waveform.
Fig. 8 is the single-phase inverter started to until specified operation for indicating excitation unit involved in embodiment 1
The figure of action logic circuit.
Fig. 9 is the movement of the single-phase inverter in the DC excitation movement for indicate excitation unit involved in embodiment 2
Circuit diagram.
Figure 10 is the output of the single-phase inverter in the DC excitation movement for indicate excitation unit involved in embodiment 2
The figure of waveform.
Figure 11 is the movement of the single-phase inverter in the DC excitation movement for indicate excitation unit involved in embodiment 2
The figure of logic circuit.
Figure 12 is the operational mode logic circuit for indicating the single-phase inverter of excitation unit involved in embodiment 3
Figure.
Figure 13 is the operational mode logic circuit for indicating the single-phase inverter of excitation unit involved in embodiment 4
Figure.
Figure 14 is the vectogram of the exciting current in excitation unit involved in embodiment 5.
Figure 15 is the circuit diagram for indicating to connect between single-phase inverter and excitation winding involved in embodiment 5.
Figure 16 is the gas-turbine for indicating to be made of the AC exciter including excitation unit involved in embodiment 6
The whole schematic circuit configuration figure of electricity generation system.
Figure 17 is the control system for indicating to be made of the AC exciter including excitation unit involved in embodiment 7
Controller chassis circuit diagram.
Figure 18 is indicated between the revolving speed and excitation frequency of the AC exciter in excitation unit involved in embodiment 8
Relationship figure.
Figure 19 is the movement of the single-phase inverter in the DC excitation movement for indicate excitation unit involved in embodiment 9
Figure.
Figure 20 is the movement of the single-phase inverter in the DC excitation movement for indicate excitation unit involved in embodiment 9
The figure of logic circuit.
Figure 21 indicates the structure by including the gas-turbine electricity generation system that the AC exciter of existing excitation unit is constituted
Figure.
Specific embodiment
Embodiment 1.
In embodiment 1, as AC exciter, the synchronous machine with d axis and q axis this 2 excitation windings is applied to
Brushless excitation mode exciter.In the following, being illustrated based on Fig. 1 to Fig. 8 to embodiments of the present invention 1.
Fig. 1 is the gas-turbine for indicating to be made of the AC exciter including excitation unit involved in embodiment 1
The whole illustrative circuitry structure chart of electricity generation system, Fig. 2 shows the circuit diagram of the single-phase inverter of excitation unit, Fig. 3 tables
Show the circuit diagram for being connected with the single-phase inverter of excitation winding.
Firstly, using Fig. 1, to the gas being made of the AC exciter including excitation unit involved in embodiment 1
The structure of body turbine electricity generation system is illustrated.In Fig. 1, by the gas that is constituted of AC exciter 9 for including excitation unit 3
Turbine electricity generation system 1 includes: gas-turbine 27；Pass through the main generator 2 that shaft 45 is connected with the rotor 28 of gas-turbine 27；
The rotating rectifier 12 that three-phase alternating current is converted into DC current and is powered to the excitation winding of main generator 2 21；
Three intersections for being constituted by armature winding 11 and d axis field winding 16 and q axis field winding 17 and being issued armature winding 11
Galvanic electricity flow-thru electrode to rotating rectifier 12 AC exciter 9；AC exciter 9 is driven when main generator 2 starts
Excitation unit 3；And electric current is provided to the field power supply 73 of excitation unit 3 to constitute.Herein, permanent magnet generator (under
Face is referred to as PMG) 40 shaft 45 of excitation 46 connect with 11 mechanicalness of armature winding of AC exciter 9.In addition, shaft 45 is also
Mechanicalness is connected to the field winding 21 of rotating rectifier 12 and main generator 2, they integrally constitute the rotor 4 of rotation.
In addition, when starting together, in order to which main generator 2 is driven as synchronous generator, comprising: as to main power generation
The indoor power supply 71 for the power supply that the armature winding 22 of machine 2 is powered；The variable-ratio inversion that the electric power of indoor power supply 71 is converted
Device device (or thyristor starter) 23；And the starting that variable-ratio DC-to-AC converter 23 is connected with armature winding 22
With contactor S1.
Further, comprising: obtained the power generation of armature winding 22 of main generator 2 using gas-turbine 27 after starting
The system for being electrically connected to system breaker S2；Transformer 24 is connected according to the system that system carries out transformation；And it sends
The interconnection target of the electric power issued i.e. system power supply 72.
Excitation unit 3 includes: to be connected with starting with contactor S5 when main generator 2 starts and by field power supply 73
Exchange is converted into the converter 41 of direct current；And it further converts direct current into and exchanges and encouraged respectively to the d axis of AC exciter 9
Single-phase inverter 31 and single-phase inverter 32 that magnetic winding 16 and q axis field winding 17 are powered is constituted.Due to encouraging d axis
Magnetic winding 16, q axis excitation winding 17 excitation winding be powered, rotor, that is, armature winding 11 of AC exciter 9 is revolved
Turn driving, so that main generator 2 starts.In addition, as shown in Fig. 2, single-phase inverter 31 and 32 by as switch element, 4
IGBT module 51~54 is constituted.In addition, the input side parallel configuration in IGBT module 51~54 has the direct current of series connection
Container 34 and 35.
In addition, AC exciter 9 by as rotor armature winding 11, encourage as the d axis excitation winding 16 and q axis of stator
Magnetic winding 17 is constituted, and is as described above connected armature winding 11 with 46 mechanicalness of excitation of PMG40 by shaft 45.?
When after main generator 2 starts and operating normally, starting switches to just common contactor S6 with connector S5, due to armature
The rotation of winding 11 is so that the excitation 46 of PMG40 also rotates, the three-phase alternating current thus generated in stator, that is, armature 47 of PMG40
It is powered to excitation unit 3.
Then, referring to Fig.1~Fig. 5 says the movement of the excitation unit of AC exciter involved in embodiment 1
It is bright.
1) inversion actions (AC excitation movement), AC exciter and the main hair of the single-phase inverter of excitation unit when starting
The movement of motor
<movement of excitation unit when starting>
The movement of excitation unit when starting to gas-turbine electricity generation system 1 is illustrated.On startup, power supply with exchange
Under the connection status of the excitation unit 3 of exciter 9, starting connects (ON) with contactor S5, and just common contactor S6 is disconnected
(OFF)。
The exchange of field power supply 73 is converted into direct current by converter 41.Further, in single-phase inverter 31, based on conversion
The direct current of device 41 and make IGBT module 51~54 switch element carry out inversion actions to generate exchange and make AC exciter 9
D axis field winding 16 carry out AC excitation.Similarly, single-phase inverter 32 carries out the switch element of IGBT module 51~54
Inversion actions are to generate the progress AC excitation of q axis excitation winding 17 for exchanging and making AC exciter 9.Herein, AC excitation
The d axis field winding 16 and q axis field winding 17 of machine 9 have 90 degree of phase difference.Therefore, the output voltage of single-phase inverter 31
Phase difference between the output voltage of single-phase inverter 32 is 90 degree, the d axis field winding 16 and q axis with AC exciter 9
The phase difference of field winding 17 is identical.
<inversion actions (AC excitation movement) of single-phase inverter>
Then, the circuit of single-phase inverter 31,32 and its inversion used in the excitation unit 3 to AC exciter 9 are dynamic
Make (AC excitation movement) to be specifically described.As shown in Fig. 2, single-phase inverter 31 and 32 is respectively by 4 as switch element
A IGBT module 51~54 is constituted, and has a structure that have series connection to connect in the input side parallel configuration of these IGBT module groups
The direct current capacitors 34 and 35 connect is for being filtered mains ripple.The output terminal a and IGBT of IGBT module 51 and 52
The output terminal b of module 53 and 54 becomes output, and 2 single-phase inverters 31,31 are respectively connected to d axis excitation winding 16 and q axis
Excitation winding 17.
IGBT module 51,52,53,54 is respectively by IGBT element 55,56,57,58 and diode element 59,60,61,62
To constitute.That is, the basic structure of each IGBT module is the combination for 1 diode element that 1 IGBT element is connect with inverse parallel.
In IGBT module, to grid (G) apply conducting (ON) signal, so as to make the electric current between collector (C) and emitter (E) into
Row energization movement.
The single-phase inverter of excitation winding is connected with when Fig. 3 illustrates that starting in the AC excitation movement of excitation unit
The circuit diagram of movement, Fig. 4 are shown through PWM (Pulse Width Modulation: pulsewidth modulation) Waveform generating method (high pressure
When) come make single-phase inverter carry out inversion actions example.The output voltage that single-phase inverter 31,32 is shown in FIG. 4 is larger
The case where output current wave example (when high pressure).In Fig. 3, output terminal a, output terminal b points of single-phase inverter 31,32
It is not connected to the d axis excitation winding 16 or q axis excitation winding 17 of AC exciter 9.
Herein, the case where output i.e. DC voltage E that converter 41 is shown in FIG. 4 is 2 series-connection power supplies of ± (E/2)
Under, the voltage waveform on the basis of midpoint 37.
As shown in Fig. 4 (a), triangular wave carrier (modulating wave) signal is compared with output sine wave signal, is being exported
In the case that sine wave signal is greater than carrier signal, side of the positive electrode IGBT module 51 is connected, is less than in output sine wave signal and carries
In the case where wave signal, negative side IGBT module 52 is connected.The PWM waveform thus generated is shown in Fig. 4 (b).In addition,
In Fig. 3, IGBT module 51 and IGBT module 54 exist in identical grid timing conduction and cut-off, IGBT module 52 and IGBT module 53
Identical grid timing conduction and cut-off.Herein, due to that can become direct-current short circuit, IGBT module 51 and IGBT module 52 (or
IGBT module 53 and IGBT module 54) it cannot simultaneously turn on.
In addition, Fig. 4 shows grid signal waveform, IGBT module 52 and the IGBT module of IGBT module 51 and IGBT module 54
Between 53 grid signal waveform, the voltage waveform Va of output terminal a, the voltage waveform Vb of output terminal b, output terminal a-b
Voltage waveform Vab (voltage obtained by output terminal a is observed on the basis of output terminal b) and with the d of AC exciter 9
The example of current waveform I0 when axis excitation winding 16 or q axis excitation winding 17 are load.
In Fig. 4, in the case where IGBT module 51 and IGBT module 54 are connected, the voltage waveform Va of output terminal a at
For the voltage of (+E/2), in the case where IGBT module 52 and IGBT module 53 are connected, the voltage waveform Va of output terminal a becomes
The voltage of (- E/2), in the case where IGBT module 52 and IGBT module 53 are connected, the voltage waveform Vb of output terminal b become (+
E/2 voltage), in the case where IGBT module 51 and IGBT module 54 are connected, the voltage waveform Vb of output terminal b becomes (- E/
2) voltage.In addition, the voltage waveform Vab between output terminal a-b can be calculated using Va-Vb.
Fig. 5 shows through PWM waveform production method (when low pressure) example for making single-phase inverter carry out inversion actions.With
When high pressure in the same manner, as shown in Fig. 5 (a), triangular wave carrier (modulating wave) signal is compared with output sine wave signal,
Sine wave signal is exported greater than in the case where carrier signal, side of the positive electrode IGBT module 51 is connected, it is small in output sine wave signal
In the case where carrier signal, negative side IGBT module 52 is connected.The PWM waveform thus generated is shown in Fig. 5 (b).This
Place, by making to export sine wave signal less than triangular wave carrier signal, to obtain grid signal.
In addition, grid signal waveform, IGBT module 52 and the IGBT of IGBT module 51 and IGBT module 54 is shown respectively in Fig. 5
Voltage waveform Vb, the output terminal a-b of the grid signal waveform of module 53, the voltage waveform Va of output terminal a, output terminal b
Between voltage waveform Vab (=Va-Vb) (voltage obtained by output terminal a is observed on the basis of output terminal b) and with hand over
The example of current waveform I0 when the d axis excitation winding 16 or q axis excitation winding 17 for flowing exciter 9 are load.
That is, being become smaller during the conducting that can be shortened voltage Va, Vb by making to export sine wave signal, thus Vab (=Va-Vb)
Voltage fundamental component become smaller.
In addition, in the above description, to put it more simply, being voltage with the midpoint 37 of the direct current capacitors 34,35 of series connection
Benchmark is illustrated, even if but be not ground connection in actual circuit, movement will not change.In addition, in order to reduce single-phase inversion
The output higher hamonic wave of device 31,32, can increase filter.In addition, having used direct current capacitors 34,35 to capacitor, but can also
To be in the capacitor that can be used under exchange.
<movement when main generator starts>
Then, movement when starting to main generator 2 is illustrated.Herein, in Fig. 1, starting is connect with contactor S5
Logical, just common contactor S6 is disconnected, and converter 41 is that alternating voltage is converted into DC voltage by input with field power supply 73, single-phase
Inverter 31,32 passes through inversion actions for the converting direct-current voltage into alternating-current voltage of converter 41.Pass through above-mentioned single-phase inverter
31,32 movement exchange encouraging from d axis excitation winding 16 of the excitation unit 3 to AC exciter 9 with q axis excitation winding 17
Magnetic.As a result, even if in the case where carrying out the slow-speed of revolution also three intersections can be induced in the armature winding 11 of AC exciter 9
Galvanic electricity pressure is further converted into direct current using rotating rectifier 12, can form excitation in the excitation winding 21 of main generator 2.
Herein, main generator 2 is synchronous machine, can play the role of synchronous motor.Therefore, by the armature of main generator 2
Winding 22 is connected with variable-ratio DC-to-AC converter 23, can be electronic as synchronizing by main generator 2 if driving main generator 2
Machine is started.That is, starting uses variable-ratio DC-to-AC converter 23 using indoor power supply 71 as input power to generate variable-ratio
Power supply, by the rotating excitation field of the armature winding 22 of main generator 2 from the slow raising speed of low frequency.By AC exciter 9 to excitation around
Group 21 has carried out excitation, and therefore, the revolving speed of main generator 2 synchronously rises with rotating excitation field.
2) the copped wave movement (DC excitation movement), exchange of the single-phase inverter of excitation unit when after starting and operating normally
The movement of exciter and main generator
<copped wave of single-phase inverter acts (DC excitation movement)>
Then, the circuit to single-phase inverter 31,32 and its copped wave movement (DC excitation movement) are illustrated.
When Fig. 6 illustrates that normal operation excitation unit DC excitation movement in single-phase inverter movement circuit
Figure, Fig. 7 show the output waveform of single-phase inverter in the DC excitation movement of excitation unit.In Fig. 6, IGBT module 51 is carried out
The switch motion of conduction and cut-off, IGBT module 54 carry out turn-on action always, and it is dynamic that IGBT module 52 and 53 carries out cut-off always
Make.
Herein, the conduction and cut-off switch motion of solid line circle expression IGBT module, solid line quadrangle show the beginning in the figure
Whole turn-on action, dotted line quadrangle show blocking action always.In the circuit operation, the IGBT element of IGBT module 51 is utilized
55 make DC voltage conduction and cut-off to carry out copped wave movement, ratio during the conducting of the IGBT element during energy basis is certain
To adjust voltage.In addition, Vab becomes positive polarity voltage.Fig. 7, which is shown, makes single-phase inverter 31 or 32 carry out copped wave movement (positive drive
Make), make output terminal a output positive voltage (+), make output terminal b export negative voltage (-) in the case where waveform.
In addition, Fig. 7 be shown respectively the grid signal waveform of IGBT module 51, IGBT module 54 grid signal waveform,
The voltage wave of the grid signal waveform of IGBT module 52 and IGBT module 53, the voltage waveform Va of output terminal a, output terminal b
Voltage waveform Vab (=Va-Vb) between shape Vb, output terminal a-b (is observed on the basis of output terminal b output terminal a and is obtained
Voltage) and with the d axis excitation winding 16 of AC exciter 9 or q axis excitation winding 17 be load when current waveform I0
Example.It herein, is voltage reference with the midpoint of direct current capacitors 37.
In Fig. 7, IGBT module 52 and IGBT module 53 are ended always.It is defeated in the case where IGBT module 51 is connected
The voltage waveform Va of terminal a becomes the voltage of (+E/2) out, in the case where IGBT module 51 is ended, the voltage of output terminal a
Waveform Va becomes the voltage of (- E/2), and the voltage waveform Vb of output terminal b is always the voltage of (- E/2).In addition, Va- can be utilized
Vb calculates the voltage waveform Vab between output terminal a-b.Current waveform I0 increases if voltage waveform Vab becomes larger to positive side,
The current value usually determined according to the resistance R of excitation winding 16,17 and voltage V.
<movement of main generator after starting>
As described above, main generator 2 is acted as synchronous motor on startup, if but gas whirlpool in Fig. 1
Wheel 27 is lighted and voluntarily runs and persistently reach certain revolving speed, then variable-ratio DC-to-AC converter 23 stops, starting contactor S1
It disconnects, further, since the excitation of excitation winding 16,17 stops, therefore, carries out the single-phase inverter 31,32 of AC excitation movement
Stop, converter 41 stops.Later, near rated speed, just common contactor S6 is connected, and starting is disconnected with contactor S5,
To which the input power of excitation unit 3 to be switched to the power supply of the electric power generated using the armature 47 of PMG40 from field power supply 73.
Herein, permanent magnet is used to the excitation of PMG40 46, three intersections using permanent magnet as rotor is generated in the armature 47 of PMG40
Galvanic electricity power.AC rectification is direct current using the three-phase ac power of the PMG40 as power supply by converter 41, and to single-phase inverter
31,32 direct current power is provided.
It inputs, carries out as described above, single-phase inverter 31,32 has been used as since being acted by copped wave from the direct current of converter 41
The conversion of DC/DC voltage, d axis excitation winding 16 and q axis excitation winding 17 to AC exciter 9 carry out DC excitation, thus
Three-phase alternating current is generated in armature winding 11, is converted into DC current using rotating rectifier 12 in the same manner as when starting, it is right
The excitation winding 21 of main generator 2 is powered, and generates AC power using the armature winding 22 of main generator 2, later, via
Breaker S2, system interconnection transformer 24, which synchronize, is input to system power supply 72.
The action logic electricity of the single-phase inverter 31,32 until main generator 2 starts to rated speed is shown in FIG. 8
Road.Action logic circuit is constituted by NOT logic portion 75,76,77 and with logic section 78,79.Inversion actions instruction passes through starting
The NOT logic portion 77 of instruction, the NOT logic portion 75 of starting END instruction and DC excitation provisioning instruction enters defeated with logic section 78
Out.In addition, copped wave action command by the NOT logic portion 76 of enabled instruction, starting END instruction and DC excitation provisioning instruction into
Enter with logic section 79 and exports.
In this way, the excitation unit of the AC exciter according to involved in embodiment 1, having the effect that can start
In the AC excitation of used time and the DC excitation after starting share excitation unit, without be arranged on startup with starting
After circuit between the contactor that switches over, simple output circuit structure can be formed, AC excitation can be changed simultaneously
Both d axis excitation winding and q axis excitation winding of machine, can not only improve control precision, moreover it is possible to carry out control response at high speed.
In addition, in the above description, single-phase inverter 31 and single-phase inverter 32 connect into the direct current of shared converter 41
Output, but converter can be respectively set to each single-phase inverter.In addition, being recorded in the circuit diagram of single-phase inverter 31,32
For the tie point 37 (midpoint) of direct current capacitors 34,35 being connected in series to be grounded, but this is in order to illustrate can not also
Ground connection.In addition, in the circuit diagram of single-phase inverter 31,32, to by direct current capacitors 34,35 be configured at single-phase inverter 31,
32 the case where, is illustrated, but as long as being connected to DC side, can be set in 41 side of converter.
In addition, being the side PWM (Pulse Width Modulation: pulsewidth modulation) to switch motion in the above description
The case where formula, is illustrated, but as long as voltage can be generated between load end, that is, output terminal a-b, is also possible to other open
Pass mode.
In addition, in the above description, to using PMG40 to be expounded as the case where excitation generator, but can be with
It is other generators.
Embodiment 2.
Fig. 9 is connected in the DC excitation movement for indicate the excitation unit of AC exciter involved in embodiment 2
The circuit diagram of the movement of the single-phase inverter of excitation winding, Figure 10 show single-phase inverter in the DC excitation movement of excitation unit
Output waveform.With single-phase inverter in the DC excitation movement of excitation unit involved in the expression embodiment 1 shown in Fig. 6
The circuit diagram of movement compare, the difference lies in that the IGBT module for carrying out conduction and cut-off switch motion is different.It is single-phase inverse
The circuit diagram for becoming device is identical as embodiment 1, and and the description is omitted.
Then, the circuit of single-phase inverter 31,32 in embodiment 2 and its copped wave movement (DC excitation movement) are carried out
Explanation.
In Fig. 9, IGBT module 53 carries out the switch motion of conduction and cut-off, and IGBT module 52 carries out turn-on action always,
IGBT module 51 and 54 carries out blocking action always.Herein, solid line circle indicates that the conduction and cut-off of IGBT module is opened in the figure
Pass movement, solid line quadrangle show turn-on action always, and dotted line quadrangle shows blocking action always.In the circuit operation,
Make DC voltage conduction and cut-off using the IGBT element 57 of IGBT module 53 to carry out copped wave movement, during energy basis is certain
IGBT element conducting during ratio adjust voltage.In addition, different from embodiment 1, Vab becomes reverse voltage.Figure
10 show make single-phase inverter 31 or 32 carry out copped wave movement (negative actuation), make output terminal a output negative voltage (-), make to export
Terminal b exports the waveform in the case where positive voltage (+).
In addition, Figure 10 be shown respectively the grid signal waveform of IGBT module 53, IGBT module 52 grid signal waveform,
The voltage wave of the grid signal waveform of IGBT module 51 and IGBT module 54, the voltage waveform Va of output terminal a, output terminal b
Voltage waveform Vab (=Va-Vb) between shape Vb, output terminal a-b (is observed on the basis of output terminal b output terminal a and is obtained
Voltage) and with the d axis excitation winding 16 of AC exciter 9 or q axis excitation winding 17 be load when current waveform I0
Example.Herein, using the midpoint of direct current capacitors 37 as voltage reference.
In Figure 10, IGBT module 51 and IGBT module 54 are ended always.The voltage waveform Va of output terminal a is always
The voltage of (- E/2), in the case where IGBT module 53 is connected, the voltage waveform Vb of output terminal b becomes the voltage of (+E/2),
In the case where IGBT module 53 is ended, the voltage waveform Vb of output terminal b becomes the voltage of (- E/2).In addition, Va- can be utilized
Vb calculates the voltage waveform Vab between output terminal a-b.Current waveform I0 reduces if voltage waveform Vab becomes larger to negative side,
The current value usually determined according to the resistance R and voltage V of d axis excitation winding 16 or q axis excitation winding 17.
By switching the movement of each IGBT module, so as to make the voltage waveform Vab between output terminal a-b become negative polarity
Voltage can rapidly reduce the exciting current for flowing through d axis excitation winding 16, q axis excitation winding 17 as a result, can be carried out demagnetization.
It is shown in FIG. 11 in the action logic circuit of single-phase inverter 31,32, it is dynamic in the copped wave (just) of embodiment 1
The action logic circuit of the single-phase inverter in the DC excitation movement of the excitation unit of (negative) movement of copped wave is added on work.Become
It attached comparator 83, NOT logic portion 80 and the structure with logic section 81,82.Logic circuit 87 is logic electricity identical with Fig. 8
Simulation excitation instruction is compared by road with positive negative judgement benchmark (0).The case where excitation instruction is greater than positive negative judgement benchmark
Under, comparator 83 is output into " 1 ", on the contrary excitation instruction be less than positive negative judgement benchmark in the case where, comparator 83 it is defeated
Become " 0 " out.In the case where " 1 ", copped wave (just) action command, should be right with logic section 81 by being exported with logic section 81
The progress of copped wave (just) action command and logic with logic section 79.In addition, copped wave (negative) action command is logical in the case where " 0 "
Cross and exported with logic section 82, should with logic section 82 to NOT logic portion 80 and with copped wave (just) action command of logic section 79 into
Capable and logic.
The excitation unit of the AC exciter according to involved in embodiment 2 as a result, can copped wave movement in will be single-phase inverse
Become the change of polarity of the output voltage of device as negative polarity, thus with being reduced into " 0 " (zero) V's in the copped wave movement of embodiment 1
Situation is compared, and exciting current further can be hastily inhibited.Therefore, excitation con-trol can rapidly be carried out by having the effect that, be mentioned
The demagnetization characteristic of height main generator in systematic failures, load change etc..
In addition, in the above description, excitation instruction is illustrated for the case where simulation, but signal level is digitized
In the case where can also obtain same effect.
Embodiment 3.
Figure 12 is the operational mode for indicating the single-phase inverter of excitation unit of AC exciter involved in embodiment 3
The figure of logic circuit.In embodiment 1, single-phase inverter carries out various output voltage controls, but in embodiment 3, utilizes
Converter controls the input dc power pressure of single-phase inverter, controls so as to the output voltage to single-phase inverter
System.Other structures are identical as embodiment 1, and and the description is omitted.
As shown in figure 12, the operational mode logic circuit of single-phase inverter includes being referred to inversion actions instruction and copped wave movement
Enable d axis inverter operation mode logic as input portion 90, q axis invertor operation mode logic portion 91 and converter operation
Mode logic portion 92 is constituted.
It when starting, is instructed by inversion actions, to d axis invertor operation mode logic portion 90 and q axis invertor operation mould
91 output inverter grid fixed instruction of formula logic section, refers to 92 output inverter DC control of converter operational mode logic section
It enables.The grid voltage for carrying out the IGBT module of inversion actions is set to become certain to defeated with fixation in single-phase inverter 31,32
Mode switches over movement out, controls the direct voltage output from converter 41, thus to from single-phase inverter
31, it 32 is controlled to the AC excitation output of the d axis field winding 16, q axis field winding 17 of AC exciter 9.
In addition, by copped wave action command, being patrolled to d axis invertor operation mode after starting and when operating normally
It collects portion 90 and q axis invertor operation mode logic portion 91 exports chopper grid fixed instruction, to converter operational mode logic
Portion 92 exports the instruction of chopper DC control.Make the IGBT module for carrying out copped wave movement in single-phase inverter 31,32 as a result,
Grid voltage becomes certain to carry out copped wave movement with the fixed mode of 100% direct current output, to from converter 41
Direct voltage output is controlled, thus to the d axis excitation winding 16 from single-phase inverter 31,32 to AC exciter 9, q axis
The DC excitation output of excitation winding 17 is controlled.
In this way, the excitation unit of the AC exciter according to involved in embodiment 3, having the effect that can be using turning
Parallel operation controls the DC voltage input of single-phase inverter, to simplify the control circuit of single-phase inverter, in addition, can change
The voltage deviation of 2 axis excitation windings of kind AC exciter.
Embodiment 4.
Figure 13 is the operational mode for indicating the single-phase inverter of excitation unit of AC exciter involved in embodiment 4
The figure of logic circuit.In embodiment 3, after starting and when operating normally, act the copped wave of single-phase inverter
The grid of IGBT module becomes the fixed mode of 100% direct current output, defeated using DC voltage of the converter to single-phase inverter
Enter to be controlled, but in embodiment 4, switching carries out the IGBT module of copped wave movement, to switch the electricity of single-phase inverter
Press output polarity.Other structures are identical as embodiment 3, and and the description is omitted.
As shown in figure 13, the operational mode logic circuit of single-phase inverter includes with inversion actions instruction and chopper (just)
Action command and chopper (negative) action command d axis invertor operation mode logic portion 90 as input, q axis invertor operation
Mode logic portion 91, converter operational mode logic section 92 and be connected with converter operational mode logic section 92 or patrol
Portion 88 is collected to constitute.
The operational mode logic circuit of single-phase inverter is identical as embodiment 3 when starting, and and the description is omitted.
After starting and when operating normally, by chopper (just) action command, patrolled to d axis invertor operation mode
It collects portion 90 and q axis invertor operation mode logic portion 91 exports chopper grid fixed instruction, to converter operational mode logic
Portion 92 exports the instruction of chopper DC control.Make the IGBT module for carrying out copped wave movement in single-phase inverter 31,32 as a result,
Grid voltage is certain to carry out copped wave movement with the fixed mode of 100% direct current output, to from the straight of converter 41
Stream voltage output is controlled, to encourage the d axis excitation winding 16 from single-phase inverter 31,32 to AC exciter 9, q axis
The DC excitation output of magnetic winding 17 is controlled.
Unlike this, in systematic failures, when load change it when, needs that main generator 2 is quickly made to demagnetize, therefore
By chopper (negative) action command to d axis invertor operation mode logic portion 90 and q axis invertor operation mode logic portion 91
Chopper grid fixed instruction is exported, the IGBT module for doing copped wave movement is switched over, to be patrolled to converter operational mode
It collects portion 92 and exports the instruction of chopper DC control.As a result, to the IGBT module for carrying out copped wave movement in single-phase inverter 31,32
It switches over (referring to Fig. 6 and Fig. 8), so as to which the voltage output polarity of single-phase inverter 31,32 is negative from positive change.By
This, can apply reverse voltage to d axis excitation winding 16, q axis excitation winding 17, main generator 2 can be made quickly to demagnetize.
The excitation unit of the AC exciter according to involved in embodiment 4 as a result, having the effect that can be in copped wave
It by the voltage output change of polarity of single-phase inverter is negative polarity in movement, thus with reducing in the copped wave of embodiment 1 movement
It is compared for the case where " 0 " (zero) V, further can rapidly inhibit exciting current, even if being carried out using converter to output voltage
In the case where control, remain to thus carry out quick excitation con-trol, improve systematic failures when, main generator when load change etc.
Demagnetization characteristic.
Embodiment 5.
Figure 14 is d axis exciting current in the excitation unit of AC exciter involved in embodiment 5, q axis exciting current
Vectogram.Figure 15 is the circuit for indicating to connect between single-phase inverter and d axis excitation winding and q axis excitation winding.With reality
In mode 1~4, single-phase inverter is applied compared with the connection between d axis excitation winding and q axis excitation winding, the difference lies in that
The contactor S7 for winding to be serially connected is provided between d axis excitation winding 16 and q axis excitation winding 17, in d
Contactor S8 is provided between axis excitation winding 16 and the outlet side of single-phase inverter 31, further, q axis excitation winding 17 with
Contactor S9 is provided between the outlet side of single-phase inverter 32.Other structures are identical as embodiment 1, and and the description is omitted.
As shown in figure 14, the exciting current of AC exciter 9 is will to flow through the exciting current of d axis excitation winding 16 and flow through
The exciting current of q axis excitation winding 17 carries out the electric current that vector is synthesized into.As alternating current, d axis and q axis are with 90 °
Phase, in the case that d axis exciting current vector is 1.0 and q axis exciting current vector is 1.0, the size of composite vector be √ 2 and
With 45 ° of phase difference.
After starting and when operating normally, in embodiment 1 to 4,2 single-phase inverters, 31,32 pairs of d axis are utilized
Excitation winding 16 and q axis excitation winding 17 carry out DC excitation, but in this case, contactor S7 are set to OFF, will be connect
Tentaculum S8 is set as connecting, and contactor S9 is set as connecting.
When normal operation after starting, as exciting current, in d axis excitation winding 16 and q axis excitation winding 17
In usually flow through the DC current of identical value, but in the case where either one or two of single-phase inverter 31 or 32 breaks down, make this
The IGBT element cut-off of single-phase inverter 31 or 32, cuts off corresponding contactor S8 or contactor S9, the single-phase inverter 31
Or 32 cut off from d axis excitation winding 16 or q axis excitation winding 17, and contactor S7 is connected, thus what cutting was broken down
Single-phase inverter, and be connected in series with other excitation windings.The case where even if 1 single-phase inverter breaks down as a result,
Under, it can also power, can continue to run to d axis excitation winding 16 and q axis excitation winding 17.
It further, can be by the voltage of main generator 2 by the way that the electric current of normal single-phase inverter is increased to 2 times of √
It is set as original voltage value, can continue to operate normally.
In this way, the excitation unit of the AC exciter according to involved in embodiment 5, has the effect that form 2 encourages
The circuit structure being connected in series between magnetic winding, even if in the case where 1 single-phase inverter of excitation unit breaks down,
Also it can be powered from another single-phase inverter to excitation winding, improve excitation unit reliability.
Embodiment 6.
Figure 16 is the gas-turbine for indicating to be made of the AC exciter including excitation unit involved in embodiment 6
The whole schematic circuit configuration figure of electricity generation system.With the excitation unit in Fig. 1 illustrated embodiment 1 the difference is that,
As shown in Figure 2, series connection is connected in parallel between switch element and converter 41 in single-phase inverter 31,32
Direct current capacitors 34,35, unlike this, in the excitation unit 30 of embodiment 6, in single-phase inverter 31,32 and converter
The double layer capacitor 67 that can store bulky capacitor charge is equipped between 41.Other structures are identical as embodiment 1, therefore omit and say
It is bright.
Voltage caused by power system accident for field power supply 73 etc. decline or power supply disappear, in available circuit
The refusal of excitation in 3m seconds~10m seconds, but by the capacitor 67 of setting bulky capacitor, it can obtain protecting during 100m seconds~several seconds
Hold the excitation unit 30 that voltage unchangeably carries out excitation.In addition, can be shortened as a result, it is not necessary that PMG40 is connected to main generator 2
The axial length of shaft 45 reduces the inertia (GD2) of the shaft 45 when starting.
The excitation unit of the AC exciter according to involved in embodiment 6 as a result, has the effect that by list
Phase inverter input side setting bulky capacitor capacitor, even if thus field power supply disappear in the case where, also can be longer
During keep voltage unchangeably to excitation winding carry out excitation.PMG is not needed in addition, having the effect that, can be shortened shaft
Axial length, thus miniaturization of the apparatus.
In addition, in the above-described embodiment, to using double layer capacitor to carry out as the case where bulky capacitor capacitor
It illustrates, but the capacitor of other types can also be used.
Embodiment 7.
Figure 17 is the control system for indicating to be made of the AC exciter including excitation unit involved in embodiment 7
Controller chassis circuit diagram.In Embodiments 1 to 6, the circuit operation of single-phase inverter is illustrated, but embodiment 7
In the entire control system being made of AC exciter 9 is shown.
In the controller chassis circuit diagram shown in Figure 17, it is provided with and detects d axis excitation winding 16 and q axis excitation winding 17
The current sensor 111,112 of electric current；Detect the voltage detector VT113 of the voltage of armature winding 22；Electric pressure converter
114；Voltage/frequency (V/F) is than converter 115；For detecting the collector ring 117 of the voltage of excitation winding 21；Voltage conversion
Device 116；And plus and minus calculation devices 105,106,108,110,124.
In addition, 103,104,107,109,121 pairs of PI amplifier control rings with ratio (P)+integral (I) function of control
The characteristics such as stability, the responsiveness on road are adjusted.
Control loop is constructed by following loop: by control PI amplifier 103,104 and grid signal generative circuit 101,102
The current controlled circuit of composition；The excitation voltage control loop constituted by controlling PI amplifier 107；By the control PI of armature voltage
The synchronous machine armature voltage control path that amplifier 109 and control switch 122 are constituted or the control by voltage/frequency (V/F) ratio
The voltage/frequency (V/F) that PI amplifier 121 and control switch 123 are constituted compares control loop.In general, in initial start stage, using encouraging
Magnetic voltage control loop carries out the fixed control of excitation voltage or carries out the fixation of V/F ratio than control loop using voltage/frequency (V/F)
Control carries out the fixed control of generator voltage using synchronous machine (generator) armature voltage control loop after reaching certain speed
System.
In this way, the excitation unit of the AC exciter according to involved in embodiment 7 makes to be connected to exchange on startup
The output frequency of the single-phase inverter of the excitation winding of exciter is certain, to output voltage, that is, AC exciter of single-phase inverter
Each winding voltage or electric current controlled, to carry out the voltage/frequency or electricity of the excitation voltage of AC exciter, armature
Therefore the control of pivot voltage can accurately control excitation.Therefore, having can be independent of the temperature of each winding or immutable
It moves and the effect of stable operation.
Embodiment 8.
Figure 18 be indicate include AC exciter in the AC exciter of excitation unit involved in embodiment 8 revolving speed
The figure of relationship between excitation frequency.
On startup, if the revolving speed of synchronous machine, that is, AC exciter 9 is that rated speed (is set as pu when 1pu by ω r '
Value), the excitation frequency of single-phase inverter 31,32 be ω exc ' (rated speed is set as to pu value when 1pu), excitation direction is set
To be opposite to the direction of rotation, in this case, (ω exc '+ω r ') is induced in the armature winding 11 of AC exciter 9
Voltage again.Herein, the excitation frequency the big, and the loss of AC exciter 9 increases, therefore, as shown in Figure 18 with
The rotational speed omega r ' of AC exciter 9 rises and reduces the excitation frequency ω exc ' of single-phase inverter 31,32, so as to reduce damage
Consumption.
In addition, excitation frequency automatically becomes direct current if making ω exc '=ω 0 ' (rated speed)-ω r ' (revolving speed).Cause
And have the effect of change from inhibition when starting to normal control switching.
In this way, the excitation unit of the AC exciter according to involved in embodiment 8, has the effect that with exchange
The revolving speed of exciter rises and reduces the output frequency for the single-phase inverter being connected with each excitation winding of AC exciter, is
Excitation voltage, armature voltage/frequency or the armature voltage of AC exciter is set to remain certain, to the output electricity of single-phase inverter
Pressure is that the voltage of each winding of AC exciter or electric current are controlled, to reduce loss and mention high control precision.
Embodiment 9.
Figure 19 is the movement of the single-phase inverter in the DC excitation movement for indicate excitation unit involved in embodiment 9
Figure, Figure 20 is that the movement of single-phase inverter in the DC excitation movement for indicate excitation unit involved in embodiment 9 is patrolled
Collect the figure of circuit.
Figure 20 shows the copped wave movement of the side of the positive electrode switch element of single-phase inverter and the copped wave of negative side switch element is moved
The logic circuit of work.The logic circuit is constituted by NOT logic portion 84 and with logic section 85,86.To side of the positive electrode switch element
The copped wave action command (chopper (just) action command) issued by copped wave action command and side of the positive electrode selection instruction into
Row with logic section 85 with logic and from exporting, and (chopper is (negative) dynamic for the copped wave action command issued to negative side switch element
Instruct) and NOT logic portion 84 to copped wave action command and side of the positive electrode selection instruction is carried out with logic from logic section 86
To export.
In embodiment 1 and 2, as shown in fig. 6, single-phase inverter 31,32 carry out copped wave movement operation when, in order to
The case where carrying out chopper operation and the switch element 55 of the side of the positive electrode IGBT module 51 of direct current capacitors made to carry out switch motion
It is expounded, but in embodiment 9, when single-phase inverter 31,32 carries out copped wave movement operation, as shown in figure 19,
When main generator 2 being carried out excitation input and disconnected every time, alternately switching carries out the side of the positive electrode IGBT module 51 of copped wave movement
Switch element 55 and the switch element of negative side IGBT module 54 58.The case where 2 IGBT modules of switching are shown in FIG. 19,
But 4 IGBT modules can also successively be switched over, by equalizing the conduction time of 4 switch elements, to mitigate concentration
The case where using particular switch element, the energy in the case where switch element is installed on radiator is had the effect that as a result,
It prevents the silicone grease used to improve pyroconductivity from drying occurs, extends maintenance period.
In this way, the excitation unit of the AC exciter according to involved in embodiment 9, it is dynamic to carry out copped wave in single-phase inverter
When running, periodically switching carries out the side of the positive electrode of copped wave movement and the IGBT module of negative side, so that having the effect that can put down
It is homogenized the conduction time of the switch element acted, can prevent the temperature of switch element from rising, extends maintenance period.
In addition, in the above-described embodiment, as the switch element used in single-phase inverter, having enumerated IGBT member
Part but it is also possible to be by can the elements such as the transistor of self-extinction of arc, GTO, GCT come the module that constitutes.
In addition, the present invention can be freely combined each embodiment in its invention scope, or to each embodiment party
Formula is suitably deformed, omits.
In addition, same label indicates same or equivalent part in the figure.
Label declaration
1 gas-turbine electricity generation system
2 main generators
3,30 excitation unit
4 rotors
9 AC exciters
11 armature winding
12 rotating rectifiers
16 d axis excitation windings
17 q axis excitation windings
21 excitation windings
22 armature winding
23 variable-ratio DC-to-AC converters
24 system interconnection transformers
27 gas-turbines
28 rotors
31,32 single-phase inverter
34,35 direct current capacitors
41 converters
45 shafts
67 capacitors
71 indoor power supplies
72 system power supplies
73 field power supplies
Contactor is used in S1 starting
S2 breaker
Contactor is used in S5 starting
The just common contactor of S6
51~54 IGBT modules
S7~S9 contactor
Claims (9)
1. a kind of excitation unit of AC exciter, the excitation unit of the AC exciter is by gas-turbine and generator institute structure
At power generator starting in use, which is characterized in that
Including 2 single-phase inverters, 2 single-phase inverters are to the AC exciter with this 2 excitation windings of d axis and q axis
That is the excitation winding of synchronous machine provides electric current respectively, and is made of switch element,
In the case where AC excitation, the single-phase inverter is made to carry out inversion actions, in the case where DC excitation, made described
Single-phase inverter carries out copped wave movement, provides exciting power to generator using the synchronous machine.
2. the excitation unit of AC exciter as described in claim 1, which is characterized in that
The single-phase inverter has multiple switch elements for carrying out copped wave movement, in the DC excitation, to the switch
Element switches over, to change the polarity of the output voltage of the single-phase inverter.
3. the excitation unit of AC exciter as described in claim 1, which is characterized in that
Make described single-phase inverse in the AC excitation and the DC excitation with the converter for being converted into direct current from exchange
The voltage cut-out movement for becoming device keeps certain, is controlled using the converter the single-phase inverter, thus right
The output voltage of the single-phase inverter is controlled.
4. the excitation unit of AC exciter as claimed in claim 3, which is characterized in that
The single-phase inverter has multiple switch elements for carrying out copped wave movement, in the DC excitation, to described single-phase
The switch element for doing copped wave movement of inverter switches over, to change the pole of the output voltage of the single-phase inverter
Property.
5. the excitation unit of AC exciter as described in claim 1, which is characterized in that
In the DC excitation, a certain in 2 single-phase inverters in the case where break down, cutting occur therefore
The single-phase inverter of barrier.
6. the excitation unit of AC exciter as described in claim 1, which is characterized in that
Including battery or capacitor, can be powered to the single-phase inverter.
7. the excitation unit of described in any item AC exciters such as claim 1 to 6, which is characterized in that
In the AC excitation, the output frequency of the single-phase inverter is made to keep certain, and to output voltage or electric current into
Row control, thus make the excitation voltage of the synchronous machine, the synchronous machine armature voltage or voltage/frequency than maintain one
It is fixed.
8. the excitation unit of described in any item AC exciters such as claim 1 to 6, which is characterized in that
In the AC excitation, subtract the output frequency of the single-phase inverter as the revolving speed of the synchronous machine rises
It is small, and output voltage or electric current are controlled, thus make the excitation voltage of the synchronous machine, the synchronous machine armature electricity
Pressure or voltage/frequency are than remaining certain.
9. the excitation unit of AC exciter as claimed in claim 2 or 4, which is characterized in that
In the DC excitation, for carrying out the switch element of copped wave movement, described in the side of the positive electrode of DC voltage
It carries out replacing switching between switch element and the switch element of negative side, equalizes the usage frequency of the switch element.
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| CN107612437A (en) * | 2017-10-13 | 2018-01-19 | 北京东标电子有限公司 | The startup method and High-power Synchronous Motor of a kind of High-power Synchronous Motor |
| CN109274300B (en) * | 2018-11-12 | 2020-03-24 | 株洲航发动科南方燃气轮机有限公司 | Starting and excitation system and method for gas turbine generator set |
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| US3775663A (en) * | 1972-08-24 | 1973-11-27 | Gen Electric | Inverter with electronically controlled neutral terminal |
| US4743777A (en) * | 1986-03-07 | 1988-05-10 | Westinghouse Electric Corp. | Starter generator system with two stator exciter windings |
| US6320767B1 (en) * | 1998-12-18 | 2001-11-20 | Kabushiki Kaisha Toshiba | Inverter apparatus |
| CN101689819A (en) * | 2007-04-20 | 2010-03-31 | 西门子能量及自动化公司 | Method of starting a synchronous motor with a brushless DC exciter |
| EP2719888A1 (en) * | 2012-10-11 | 2014-04-16 | Hamilton Sundstrand Corporation | Dual-DC bus starter/generator |
| CN104218851A (en) * | 2014-09-16 | 2014-12-17 | 西北工业大学 | Topological structure and device of three-stage brushless starting/generator alternating-current and direct-current mixed excitation system |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101636896B (en) * | 2007-02-22 | 2012-07-18 | 三菱电机株式会社 | 3-phase power conversion device |
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|---|---|---|---|---|
| US3775663A (en) * | 1972-08-24 | 1973-11-27 | Gen Electric | Inverter with electronically controlled neutral terminal |
| US4743777A (en) * | 1986-03-07 | 1988-05-10 | Westinghouse Electric Corp. | Starter generator system with two stator exciter windings |
| US6320767B1 (en) * | 1998-12-18 | 2001-11-20 | Kabushiki Kaisha Toshiba | Inverter apparatus |
| CN101689819A (en) * | 2007-04-20 | 2010-03-31 | 西门子能量及自动化公司 | Method of starting a synchronous motor with a brushless DC exciter |
| EP2719888A1 (en) * | 2012-10-11 | 2014-04-16 | Hamilton Sundstrand Corporation | Dual-DC bus starter/generator |
| CN104218851A (en) * | 2014-09-16 | 2014-12-17 | 西北工业大学 | Topological structure and device of three-stage brushless starting/generator alternating-current and direct-current mixed excitation system |
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