CN108110788A - Electricity generation system, power conversion system, power-converting device and electric power conversion method - Google Patents
Electricity generation system, power conversion system, power-converting device and electric power conversion method Download PDFInfo
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- CN108110788A CN108110788A CN201711183841.0A CN201711183841A CN108110788A CN 108110788 A CN108110788 A CN 108110788A CN 201711183841 A CN201711183841 A CN 201711183841A CN 108110788 A CN108110788 A CN 108110788A
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- 230000005611 electricity Effects 0.000 title claims abstract description 35
- 238000006243 chemical reaction Methods 0.000 title claims abstract description 26
- 238000000034 method Methods 0.000 title claims abstract description 12
- 230000001629 suppression Effects 0.000 claims abstract description 99
- 230000000630 rising effect Effects 0.000 claims abstract description 96
- 238000010248 power generation Methods 0.000 claims abstract description 89
- 238000004519 manufacturing process Methods 0.000 claims abstract description 5
- 230000009467 reduction Effects 0.000 claims description 5
- 239000012530 fluid Substances 0.000 claims description 2
- 239000007788 liquid Substances 0.000 abstract description 6
- 238000012937 correction Methods 0.000 description 28
- 230000008859 change Effects 0.000 description 15
- 238000004364 calculation method Methods 0.000 description 10
- 238000013499 data model Methods 0.000 description 9
- 230000002829 reductive effect Effects 0.000 description 9
- 239000000523 sample Substances 0.000 description 9
- 238000012360 testing method Methods 0.000 description 8
- 238000010586 diagram Methods 0.000 description 7
- 238000012545 processing Methods 0.000 description 7
- 230000005764 inhibitory process Effects 0.000 description 6
- 238000012546 transfer Methods 0.000 description 6
- 230000008901 benefit Effects 0.000 description 5
- 230000002401 inhibitory effect Effects 0.000 description 5
- 230000010354 integration Effects 0.000 description 5
- 239000003990 capacitor Substances 0.000 description 4
- 238000012790 confirmation Methods 0.000 description 4
- 238000001514 detection method Methods 0.000 description 4
- 238000000465 moulding Methods 0.000 description 4
- 230000009466 transformation Effects 0.000 description 4
- 238000013459 approach Methods 0.000 description 3
- 230000009471 action Effects 0.000 description 2
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- 230000005540 biological transmission Effects 0.000 description 2
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Classifications
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- H02J3/382—
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M5/00—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases
- H02M5/40—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases with intermediate conversion into dc
- H02M5/42—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases with intermediate conversion into dc by static converters
- H02M5/44—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases with intermediate conversion into dc by static converters using discharge tubes or semiconductor devices to convert the intermediate dc into ac
- H02M5/453—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases with intermediate conversion into dc by static converters using discharge tubes or semiconductor devices to convert the intermediate dc into ac using devices of a triode or transistor type requiring continuous application of a control signal
- H02M5/458—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases with intermediate conversion into dc by static converters using discharge tubes or semiconductor devices to convert the intermediate dc into ac using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only
- H02M5/4585—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases with intermediate conversion into dc by static converters using discharge tubes or semiconductor devices to convert the intermediate dc into ac using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only having a rectifier with controlled elements
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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
- H02P9/006—Means for protecting the generator by using control
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Abstract
It provides and a kind of effectively improves the electricity generation system to the adaptability of electric system, power conversion system, power-converting device and electric power conversion method.Electricity generation system (1) includes：Power Generation Section (2) utilizes the first AC power of energy production of liquid flow；First AC power is transformed to direct current power by converter circuit (42)；Direct current power is transformed at least be output to electric system (PS) after the second AC power by inverter circuit (52)；And controller (100), it is configured to：So that the mode for the maximization current value that the output current value of Power Generation Section (2) is become maximum close to the first AC power controls converter circuit (42) under usual operation mode, in the case where rising suppression mode converter circuit (42) is controlled in a manner of increasing difference of the output current value of Power Generation Section (2) with maximizing current value compared with usual operation mode, in the case where system voltage rises, perform and usual operation mode is switched into rising suppression mode.
Description
Technical field
The present invention relates to electricity generation system, power conversion system, power-converting device and electric power conversion methods.
Background technology
Patent Document 1 discloses the torque by controlling generator so that generator was operated with maximum efficiency
Technology.
Citation
Patent document
Patent document 1：Japanese Patent No. 4725841.
The content of the invention
Problem to be solved by the invention
It is an object of the invention to provide be conducive to improve the electricity generation system to the adaptability of electric system, power converter system
System, power-converting device and electric power conversion method.
The means used to solve the problem
Electricity generation system of the present invention includes：Power Generation Section, Power Generation Section utilize the first alternating current of energy production of fluid stream
Power；First AC power is transformed to direct current power by the first power converter portion, the first power converter portion；Second power converter portion,
Direct current power is transformed to the second AC power by the second power converter portion, and is at least output to electric system；And control unit, control
Portion processed is configured to：The first power converter portion is controlled under usual operation mode so that the output current value of Power Generation Section approaches
The maximization current value that first AC power becomes maximum, controlled in the case where rising suppression mode the first power converter portion with it is usual
Operation mode rises compared to the difference of the output current value and maximization current value of increase Power Generation Section in the voltage of electric system
In the case of, usual operation mode is switched into rising suppression mode.
Control unit can be configured to：The output current value of Power Generation Section is made to be more than maximum galvanic current in the case where rising suppression mode
Value.
Control unit can be configured to：Controlled in the case where rising suppression mode the first power converter portion with usual operation mode
Compared to the output current value of increase Power Generation Section with after the difference of maximization current value, the second power converter portion being controlled, with leading to
Normal operation mode is compared to the second AC power of reduction.
Control unit can be configured to：The second power converter portion is also controlled under usual operation mode, with according to power train
The rising of the voltage of system and increase and inputted from the first power converter portion to the DC voltage in the second power converter portion, in electric system
Voltage reach first threshold before, usual operation mode is switched to by rising suppression mode according to the rising of DC voltage,
In the case where rising suppression mode, the first power converter portion is being controlled with the output current of the increase Power Generation Section compared with usual operation mode
After difference of the value with maximizing current value, in the case where the voltage of electric system is more than first threshold, the second electric power is controlled
Transformation component, to reduce the second AC power compared with usual operation mode.
This disclosure relates to power conversion system include：First power converter portion, the first power converter portion will be in Power Generation Section
First AC power of middle generation is transformed to direct current power；Second power converter portion, the second power converter portion become direct current power
The second AC power is changed to, and is at least exported to electric system；Control unit, control unit are configured to：Under usual operation mode
The first power converter portion is controlled so that the maximum galvanic current that the output current value of Power Generation Section becomes maximum close to the first AC power
Value controls the first power converter portion in the case where rising suppression mode to increase the output current of Power Generation Section compared with usual operation mode
Value and the difference for maximizing current value, rising is switched in the case where the voltage of electric system rises by usual operation mode
Suppression mode.
This disclosure relates to power-converting device include：First power converter portion, the first power converter portion are arranged on hair
Between electric portion and electric system, the first AC power generated in Power Generation Section is transformed to direct current power；Control unit, control unit
It is configured to：The first power converter portion is controlled under usual operation mode so that the output current value of Power Generation Section is exchanged close to first
The maximization current value that electric power becomes maximum, controlled in the case where rising suppression mode the first power converter portion with usual operation mode
Compared to the difference of the output current value and maximization current value of increase Power Generation Section, in the case where the voltage of electric system rises
Usual operation mode is switched into rising suppression mode.
This disclosure relates to electric power conversion method include：The first power converter portion is controlled, will exported from Power Generation Section
One AC power is transformed to direct current power；The second power converter portion is controlled, after direct current power is transformed to the second AC power
It exports to electric system；And the first power converter portion is controlled under usual operation mode so that the output current value of Power Generation Section connects
The maximization current value that nearly first AC power becomes maximum controls the first power converter portion to increase in the case where rising suppression mode
The output current value of Power Generation Section and the difference for maximizing current value, will be usual in the case where the voltage of electric system rises
Operation mode switches to rising suppression mode.
Invention effect
According to the disclosure, it is capable of providing and is conducive to improve the electricity generation system to the adaptability of electric system, power converter system
System, power-converting device and electric power conversion method.
Description of the drawings
Fig. 1 is the schematic diagram being integrally formed for showing electricity generation system.
Fig. 2 is the block diagram for the functional composition for showing controller.
Fig. 3 is to show the block diagram that the hardware of controller is formed.
Fig. 4 is the flow chart for the control sequence for showing the converter circuit under usual operation mode.
Fig. 5 is to schematically show the relation of rotating speed and torque in generator and the relation of rotating speed and output power
Graph.
Fig. 6 is the flow chart for the control sequence for showing the inverter circuit under usual operation mode.
Fig. 7 is the flow chart for showing to rise the control sequence of the converter circuit under suppression mode.
Fig. 8 is to schematically show the relation of rotating speed and torque in generator and the relation of rotating speed and output power
Graph.
Fig. 9 is the flow chart for showing to rise the control sequence of the inverter circuit 52 under suppression mode.
Figure 10 is the flow chart for the transfer sequence for showing control model.
Figure 11 is the schematic diagram for the variation for showing electricity generation system.
Figure 12 is the flow chart of the variation for the transfer sequence for showing control model.
Specific embodiment
Hereinafter, embodiment is explained in detail with reference to the accompanying drawings.In explanation, to the element with identical element or identical function
Same-sign is marked, omits repeated explanation.
(electricity generation system)
As shown in Figure 1, electricity generation system 1 includes Power Generation Section 2 and power conversion system 3.
Power Generation Section 2 utilizes the energy production AC power (hereinafter referred to as " the first AC power " of the liquid flows such as current.).
Current include natural flows, tidewater of blowdown stream, rivers and creeks or the water channel of reservoir etc. etc..First AC power is, for example, three-phase alternating current
Electric power.
Power Generation Section 2 has rotary body 21, transmission mechanism 22, generator 23 and speed probe 24.Rotary body 21 and liquid
Body stream connects and rotates.The rotation of rotary body 21 is passed to generator 23 by transmission mechanism 22.Generator 23 is according to from rotary body
21 transfer rotations and generate the first AC power.Specific example as generator 23 can include IPM (Interior
Parmanent Magnet, interior permanent magnets) generator.Speed probe 24 detects the rotating speed of generator 23.For example, rotating speed
Sensor 24 is rotary encoder, the pulse signal of the output frequency proportional to the rotating speed of generator 23.In addition, revolution speed sensing
Device 24 is not essential.For example, in power conversion system 3, the position of magnetic pole of generator 23 can also be estimated, based on the magnetic pole
The rotating speed of location estimation generator 23.
In addition, as long as Power Generation Section 2 at least generates the device of AC power, such as can also be the energy using wind-force
Amount generates the device of AC power.
First AC power is transformed to can adapt to by power conversion system 3 between Power Generation Section 2 and electric system PS
The AC power (hereinafter referred to as " the second AC power " of electric system PS.) and be output to electric system PS.Electric system PS is
The system for providing power to various power receiving equipments.Second AC power is, for example, three-phase ac power.
Power conversion system 3 is connected via electromagnetic contactor 12 with generator 23, and via filter circuit 13 and open circuit
Relay 14 is connected with electric system PS.Electromagnetic contactor 12 is according to from external instruction input switching generator 23 and electric power
The state that the state and the connection that transformation system 3 is electrically connected are disconnected.Filter circuit 13 removes the second AC power and is wrapped
The high fdrequency component contained.Cut-out relay 14 cuts power conversion system 3 from electric system PS according to from external instruction input
From.
(power conversion system)
Power conversion system 3 includes (the first electric power of converter circuit 42 that the first AC power is transformed to direct current power
Transformation component), above-mentioned direct current power is transformed to the second AC power and is at least exported to the inverter circuit 52 of electric system (
Two power converter portions) and control their controller 100 (control unit).Hereinafter, more specifically example power transformation system 3
Composition.
Power conversion system 3 has is contained in the converter unit 4 (power-converting device) of different frameworks and inverse each other
Become device unit 5, they are connected to each other by direct current cables 11.
(converter unit)
Converter unit 4 includes AC input lines 41, converter circuit 42 and DC leadout 43.AC input lines
41 will guide from the first AC power that generator 23 exports to converter circuit 42.AC input lines 41 are provided with input electricity
Flow sensor 44 and input voltage sensor 45.The detection of input current sensor 44 carrys out the input current of self generator 23.Input
The detection of voltage sensor 45 carrys out the input voltage of self generator 23.
Converter circuit 42 has multiple diodes 46 and the multiple switch being connected in parallel respectively with multiple diodes 46
First AC power is transformed to direct current power and exported by element 47.By being switched on or switched off for switch element 47, can control
Carry out the output current of self generator 23.
DC leadout 43 guides the direct current power exported from converter circuit 42 to direct current cables 11.In direct current output
Line 43 is provided with capacitor 48 and busbar voltage sensor 49.Capacitor 48 makes the DC voltage in DC leadout 43 smooth
Change.The DC voltage that busbar voltage sensor 49 detects DC leadout 43 (is inputted from converter circuit 42 to DC leadout
43 DC voltage).
(inverter unit)
Inverter unit 5 includes direct current input line 51, inverter circuit 52 and exchange output line 53.Direct current input line
51 guide the direct current power guided by direct current cables 11 to inverter circuit 52.Direct current input line 51 is provided with capacitor 54
With busbar voltage sensor 55.Capacitor 54 smooths the DC voltage in direct current input line 51.Busbar voltage sensor 55
Detect the DC voltage (being inputted from converter circuit 42 to the DC voltage of DC leadout 43) in direct current input line 51.
Inverter circuit 52 has multiple switch element 56 and is connected in parallel respectively with multiple switch element 56 multiple
Direct current power by being switched on or switched off for multiple switch element 56, is transformed to the second AC power and exported by diode 57.
Exchange output line 53, which will be guided from the second AC power that inverter circuit 52 exports to filter circuit 13, to be connected
The coupling part connect.System voltage sensor 58 is provided on exchange output line 53.The detection of system voltage sensor 58 comes from
The output voltage (i.e. the voltage of electric system PS) of inverter circuit 52.System voltage sensor 58 can be detected from inverter electricity
The amplitude (i.e. the amplitude of the alternating voltage of electric system PS) for the alternating voltage that road 52 exports, can also detect from inverter circuit
The virtual value (that is, the virtual value of the alternating voltage of electric system PS) of the alternating voltage of 52 outputs.
(controller)
Controller 100 is configured to：Converter circuit 42 is controlled under usual operation mode so that the output current of Power Generation Section 2
The maximization current value that value becomes maximum close to the first AC power, in the case where rising suppression mode control converter circuit 42 with
Usual operation mode is compared to the output current value of increase Power Generation Section 2 and the difference of maximization current value, in the electricity of electric system PS
In the case that pressure (such as amplitude or virtual value of the alternating voltage of electric system PS) rises, usual operation mode is switched to
Rise suppression mode.
Controller 100 is configured to make in the case where rising suppression mode the output current value of Power Generation Section 2 than maximum galvanic current
Value is big.
Controller 100 is configured to control converter circuit 42 in the case where rising suppression mode to compare usual operation mode
After increasing difference of the output current value of Power Generation Section 2 with maximizing current value, inverter circuit 52 is also controlled, to compare usually
Operation mode reduces the second AC power.
Controller 100 further performs the control of inverter circuit 52 under usual operation mode, with according to electric system
The voltage (hereinafter referred to as " system voltage " of PS.) rising increase inputted from converter circuit 42 to the direct current of inverter circuit 52
Voltage (hereinafter referred to as " DC bus-bar voltage ".), before system voltage reaches first threshold, according to the upper of DC bus-bar voltage
It rises and usual operation mode is switched into rising suppression mode, converter circuit 42 is controlled in the case where rising suppression mode to compare usually
It is more than the first threshold in system voltage after difference of the output current value of operation mode increase Power Generation Section 2 with maximizing current value
In the case of value, inverter circuit 52 is controlled, reduces the second AC power to compare usual operation mode.
As an example, controller 100 has the first controller 200 for being built in converter unit 4 and is built in inverse
Become the second controller 300 of device unit 5.Hereinafter, the specific of the first controller 200 and second controller 300 is exemplified with reference to Fig. 2
It forms.
First controller 200 controls converter under any control model in usual operation mode and rising suppression mode
Circuit 42.Usual operation mode is for making the output current value of Power Generation Section 2 close to the control model for maximizing current value.Rise
Suppression mode is for comparing the control of difference of the output current value of usual operation mode increase Power Generation Section 2 with maximizing current value
Molding formula.
As shown in Fig. 2, the first controller 200 is as composition (hereinafter referred to as " functional block " functionally.) include usually fortune
Row operational part 210 rises inhibition operational part 220, torque instruction calculating part 230, raster data model portion 240 and first mode switching
Portion 250.
The usually gain of the operation calculating of calculating torque command value under usual operation mode of operational part 210.It is for example, logical
Often operation operational part 210 includes power system calculation portion 211, electric power storage part 212, electric power increase and decrease judging part 213, gain calculating part
214 and gain storage part 215.
Electric power storage part 212 sequentially stores the result of calculation of the first AC power.Gain storage part 215 sequentially stores
The result of calculation of gain.
Power system calculation portion 211 obtains the detected value of the input current from Power Generation Section 2 from input current sensor 44, from defeated
Enter the detected value that voltage sensor 45 obtains the input voltage from Power Generation Section 2, they are multiplied and calculates the first AC power, it will
Result of calculation write-in electric power storage part 212.
Electric power increase and decrease storage content of the judging part 213 based on electric power storage part 212 judges that the first AC power is to increase also
It is to reduce.
The storage content of judging result and gain storage part 215 of the gain calculating part 214 based on electric power increase and decrease judging part 213
The gain of calculating torque setting, by result of calculation write-in gain storage part 215.Specifically, gain calculating part 214 is first
In the case of AC power is increased due to the change of the gain of last time, change gain on the direction identical with last time,
In the case that one AC power is reduced due to the change of the gain of last time, change gain on the direction opposite with last time.Example
Such as, gain calculating part 214 is increased due to the increase of the gain of last time in the first AC power, in the same manner as last time
Increase gain, in the case where the first AC power is reduced due to the increase of the gain of last time, reduce increasing on the contrary with last time
Benefit.In addition, gain calculating part 214 is increased same with last time due to the reduction of the gain of last time in the first AC power
It reduces gain sample, in the case where the first AC power is reduced due to the reduction of the gain of last time, increased on the contrary with last time
Add gain.The value of gain is close as a result, makes the maximized gain of the first AC power (hereinafter referred to as " maximization gain ".).
Rise the gain for inhibiting the calculating of calculating torque command value in the case where rising suppression mode of operational part 220.On for example,
It rises and inhibits operational part 220 including gain correction value calculating part 221 and inhibit gain calculating part 222.
Gain correction value calculating part 221 obtains the detected value of DC bus-bar voltage from busbar voltage sensor 49, according to this
The size of detected value calculates gain correction value.For example, gain correction value calculating part 221 is examined for by busbar voltage sensor 49
The deviation of the DC voltage value measured and predetermined threshold value (such as aftermentioned first switching threshold) implements scale operation or ratio
The value of example integral operation etc. calculates the gain correction value more than 1 plus 1.
Inhibit gain calculating part 222 and be directed to newest gain (hereinafter referred to as " the usually increasing for being stored in gain storage part 215
Benefit ".) used the amendment of the gain correction value calculated by gain correction value calculating part 221, the increasing of calculating torque setting
Benefit.For example, inhibit gain calculating part 222 is multiplied by gain correction value to calculate gain to usual gain.Usual gain with it is above-mentioned
It maximizes under gain approximation unanimous circumstances, by the multiplication of gain correction value, the difference of gain and above-mentioned maximization gain is big
In usual operation mode.
Gain can be calculated by usual gain divided by gain correction value by inhibiting gain calculating part 222.As a result, gain with
The difference of above-mentioned maximization gain is more than usual operation mode.
First mode switching part 250 is in the case where system voltage rises by the control model of the first controller 200 from logical
Normal operation mode switches to rising suppression mode, in the case where system voltage declines by the control model of the first controller 200
Usual operation mode is switched to from suppression mode is risen.When system voltage by the control of aftermentioned second controller 300 and on
When rising, correspondingly DC bus-bar voltage also rises.Therefore, first mode switching part 250 replaces system voltage value and monitors
D-c bus voltage value operates the control model of the first controller 200 from usual in the case where DC bus-bar voltage rises
Pattern switching to rising suppression mode, in the case where DC bus-bar voltage declines by the control model of the first controller 200 from
Rise suppression mode and switch to usual operation mode.
As an example, first mode switching part 250 obtains the detected value of DC bus-bar voltage from busbar voltage sensor 49,
It is more than predetermined threshold value (hereinafter referred to as " the first switching threshold " in the detected value.) in the case of, by the control of the first controller 200
Molding formula switches to rising suppression mode from usual operation mode, the detected value less than in the case of the first switching threshold by the
The control model of one controller 200 switches to usual operation mode from suppression mode is risen.
Torque instruction calculating part 230 obtains the detected value of the rotating speed of generator 23 from speed probe 24, and based on this turn
Speed and the gain calculating torque command value calculated by usually running operational part 210 or rising inhibition operational part 220.For example, torque
Instruction calculating part 230 calculating torque command value by square being multiplied by gain of rotating speed.
Torque instruction calculating part 230 can replace obtaining the detected value of the rotating speed of generator 23 from speed probe 24, and
Rotating speed based on the first AC power estimation generator 23.For example, torque instruction calculating part 230 can be from input current sensor
44 obtain the detected value of the input current from Power Generation Section 2, and the input electricity from Power Generation Section 2 is obtained from input voltage sensor 45
The detected value of pressure estimates the position of magnetic pole of generator 23 based on them, the rotating speed based on position of magnetic pole estimation generator 23.
Raster data model portion 240 is so that the output current value of Power Generation Section 2 becomes and calculated by torque instruction calculating part 230
The mode of the corresponding value of torque instruction value generates gate drive signal, and exports to the multiple switch element of converter circuit 42
47.In addition, " value corresponding with torque instruction value " refers to the torque for generating Power Generation Section 2 and torque instruction value substantial one
The value of cause.
Converter circuit 42 acts according to the gate drive signal exported by raster data model portion 240, thus Power Generation Section 2
Output current value becomes the relevant value of rotating speed with above-mentioned gain and generator 23.Under usual operation mode, when gain approaches
When maximizing gain, the output current value of Power Generation Section 2 is close to above-mentioned maximization current value.In the case where rising suppression mode, to usual
When gain correction value is multiplied by gain, the output current value of Power Generation Section 2 becomes larger, when from usual gain divided by gain correction value, hair
The output current value in electric portion 2 becomes smaller.In addition, in the case where rising suppression mode, when gain becomes larger with maximizing the difference of gain, power generation
The output current value in portion 2 becomes larger with maximizing the difference of current value.
Second controller 300 controls inverter under any control model in usual operation mode and rising suppression mode
Circuit 52.Usual operation mode be adjust the second AC power and so that DC bus-bar voltage (from converter circuit 42 input to
The DC voltage of inverter circuit 52) close to the control model of desired value.Rising suppression mode is subtracted compared to usual operation mode
The control model of small second AC power.
Second controller 300 has usually operation operational part 310, second mode switching part 320, rising suppression as functional block
Operational part 330 processed and raster data model portion 340.
Usually operation operational part 310 calculates the target of the electric power as the output of the second AC power under usual operation mode
Value so that DC bus-bar voltage is close to desired value.For example, usually operation operational part 310 includes busbar voltage target value calculating portion
311 and output power target value calculating portion 312.
Busbar voltage target value calculating portion 311 obtains the detected value of system voltage from system voltage sensor 58, according to this
Detected value calculates the desired value of DC bus-bar voltage.Specifically, busbar voltage target value calculating portion 311 is pre- in system voltage
Fixed threshold value (hereinafter referred to as " adjusts and starts threshold value ".) below in the case of, make the desired value become fixed value.It adjusts and starts threshold
Value is less than above-mentioned first switching threshold.
Busbar voltage target value calculating portion 311 is increased in the case that adjusting starts threshold value in system voltage according to being
The desired value of the rising increase DC bus-bar voltage of system voltage.
Output power target value calculating portion 312 calculates the desired value of the second output power so that DC bus-bar voltage approaches
The desired value calculated by busbar voltage target value calculating portion 311.Specifically, output power target value calculating portion 312 is from busbar
Voltage sensor 55 obtain DC bus-bar voltage detected value, and from the second current output power subtract to the detected value with by
Deviation between the desired value that busbar voltage target value calculating portion 311 calculates implements scale operation or proportional integration computing etc.
Value calculates the desired value of the second output power.
Rise and inhibit the mesh that operational part 330 calculates the electric power exported as the second AC power in the case where rising suppression mode
Scale value.There is output power target value calculating portion 331 for example, rising and inhibiting operational part 330.Output power target value calculating portion
331 calculate the desired value of the second output power, to reduce system voltage.Specifically, output power target value calculating portion 331 from
System voltage sensor 58 obtains the detected value of system voltage, and from the second current output power subtract to the detected value with it is pre-
Deviation between fixed threshold value (such as aftermentioned second switching threshold) implements the value of scale operation or proportional integration computing etc., meter
Calculate the desired value of the second output power.
Second mode switching part 320 is in the case where system voltage rises by the control model of second controller 300 from logical
Normal operation mode switches to rising suppression mode, in the case where system voltage declines by the control model of second controller 300
Usual operation mode is switched to from suppression mode is risen.
As an example, second mode switching part 320 obtains the detected value of system voltage from system voltage sensor 58, at this
Detected value is more than predetermined threshold value (hereinafter referred to as " the second switching threshold ".) in the case of, by the control mould of second controller 300
Formula switches to rising suppression mode from usual operation mode, is controlled in the detected value less than in the case of the second switching threshold by second
The control model of device 300 processed switches to usual operation mode from suppression mode is risen.Second switching threshold is more than the first switching threshold
Value.
Raster data model portion 340 so that the second output power become with by output power target value calculating portion 312 or output electricity
The mode of the consistent value of desired value that power target value calculating portion 331 calculates generates gate drive signal, and exports to inverter
The multiple switch element 56 of circuit 52.
As described above, the first controller 200 and second controller 300 it is each in usually operation mode and rising inhibit
Pattern is switched, and the whole control model of controller 100 is defined as follows.If at least control mould of the first controller 200
Formula is usual operation mode, then the control model of controller 100 is also usual operation mode, if at least the first controller 200
Control model be rise suppression mode, then the control model of controller 100 be also rise suppression mode.That is, first mode is cut
Change the pattern switching portion 110 that portion 250 forms controller 100.
Fig. 3 is to exemplify the block diagram that the hardware of controller 100 is formed.As shown in figure 3, the first controller 200 has circuit
290, second controller 300 has circuit 390.
Circuit 290 have one or more processors 291, memory 292, memory 293, input/output port 294 and
Gate driving circuit 295.Input/output port 294 according to the instruction from processor 291 with input current sensor 44, defeated
Enter between voltage sensor 45, busbar voltage sensor 49 and speed probe 24 into the input and output of horizontal electrical signal.Grid drives
Dynamic circuit 295 is according to the instruction generation gate drive signal from processor 291 and exports to converter circuit 42.
Memory 293 is such as hard disk or nonvolatile memory, has recorded to perform the control of converter circuit 42
The program of system.Memory 292 is temporarily recorded from the program of recording medium loading of memory 293 and the computing of processor 291
As a result.Processor 291 cooperates with memory 292 performs above procedure, thus forms above-mentioned each functional block.
Circuit 390 also has processor 391, memory 392, memory 393, input/output port in the same manner as circuit 290
394 and gate driving circuit 395.Input/output port 394 is sensed according to the instruction from processor 391 with busbar voltage
Into the input and output of horizontal electrical signal between device 55 and system voltage sensor 58.Gate driving circuit 395 is according to from processor
391 instruction generation gate drive signal is simultaneously exported to inverter circuit 52.
In addition, the hardware composition of controller 100 is not necessarily limited to be made of the structure of each functional block program.Such as controller
100 each functional block can pass through dedicated logic circuit or the ASIC (Application of the integrated logic circuit
Specific Integrated Circuit, application-specific integrated circuit) it forms.
(electric power conversion method)
Then, an example as electric power conversion method illustrates the power converter control sequence carried out by controller 100.It should
Order includes：Control converter circuit 42 that the first AC power exported from Power Generation Section 2 is transformed to direct current power；It controls inverse
Become device circuit 52 so that direct current power to be transformed at least be exported after the second AC power to electric system PS；And it is usually operating
Converter circuit 42 is controlled under pattern so that the output current value of Power Generation Section 2 inhibits close to above-mentioned maximization current value rising
The difference that converter circuit 42 is controlled under pattern to increase the output current value of Power Generation Section 2 with maximize current value, in system electricity
It presses and usual operation mode is switched into rising suppression mode in the case of rising.
Hereinafter, the inversion being divided under the control sequence of the converter circuit 42 under usual operation mode, usual operation mode
It is inverse under the control sequence of device circuit 52, the control sequence of the converter circuit 42 under rising suppression mode, rising suppression mode
Become the control sequence of device circuit 52 and the transfer sequence of control model to show the specific example of power converter control sequence.
(control sequence of the converter circuit under usual operation mode)
First, the control sequence of the converter circuit 42 under usual operation mode is exemplified.As shown in figure 4, controller 100
Step S01 is first carried out.In step S01, power system calculation portion 211 is obtained from input current sensor 44 from Power Generation Section 2
The testing result of input current obtains the testing result of the input voltage from Power Generation Section 2 from input voltage sensor 45.
Then, controller 100 performs step S02.In step S02, power system calculation portion 211 will obtain in step S01
Input current be multiplied with input voltage and calculate the first AC power, by result of calculation write-in electric power storage part 212.
Then, controller 100 performs step S03.In step S03, electric power increase and decrease judging part 213 judges whether in electric power
More than two data are stored with to timing in storage part 212.
In the case where electric power storage part 212 does not store more than two data with having timing, controller 100 performs step
Rapid S04.In step S04, gain calculating part 214 is increasing direction or is reducing the current gain of direction change.For example, gain meter
Calculation portion 214 is for current gain plus or minus preset spacing (pitch).
In step S03, when being judged as being stored with more than two data to timing in electric power storage part 212,
Controller 100 performs step S05.In step S05, electric power increase and decrease 213 more newest first AC power of judging part and
The first previous AC power in sequential, confirms whether the first AC power increases.
In step S05, when being judged as the first AC power increase, controller 100 performs step S06.In step S06
In, gain calculating part 214 is to the change of the gain with last time (from previous gain to the change of newest gain in sequential)
Identical direction changes gain.For example, gain calculating part 214 makes last time gain increased, to newest gain phase
In addition spacing is stated, by its result write-in gain storage part 215.
In addition, gain calculating part 214 subtracts above-mentioned spacing in the case where reducing last time gain from newest gain,
By its result write-in gain storage part 215.
In step S05, when being judged as that the first AC power does not increase, controller 100 performs step S07.In step
In S07, the direction that the change of gain calculating part 214 to the gain with last time is opposite changes gain.For example, gain calculating part 214
In the case that making, last time gain is increased, and above-mentioned spacing is subtracted from newest gain, by its result write-in gain storage part 215.
In addition, gain calculating part 214 is added above-mentioned spacing in the case where reducing last time gain, to newest gain, and tied
Fruit write-in gain storage part 215.
After the either step of step S04, S06, S07 is performed, controller 100 performs step S08.In step S08
In, torque instruction calculating part 230 obtains the testing result of the rotating speed of generator 23 from speed probe 24.Torque instruction calculating part
230 can replace obtaining the detected value of the rotating speed of generator 23 from speed probe 24, and based on the first AC power estimation hair
The rotating speed of motor 23.
Then, controller 100 performs step S09.In step S09, torque instruction calculating part 230 be based on step S04,
The gain calculated in the either step of S06, S07 and the testing result calculating torque command value of the rotating speed obtained in step S09.
For example, testing result progress square of the torque instruction calculating part 230 to rotating speed, and gain calculating torque command value is multiplied by this.
Then, controller 100 performs step S10.In step slo, raster data model portion 240 is so that the output of Power Generation Section 2
The mode that current value becomes value corresponding with the torque instruction value calculated in step S09 generates gate drive signal, and exports
To the multiple switch element 47 of converter circuit 42.
Then, controller 100 performs step S11.In step s 11, usually the confirmation of operation operational part 210 is whether there is from the
The halt instruction in one pattern switching portion 250.In step s 11, when being judged as no pattern switching instruction, controller 100 will
Processing returns to step S01.
After, until halt instruction is exported from first mode switching part 250, repeat following action：When first
When AC power increases due to the change of the gain of last time, change gain on the direction identical with last time, when the first exchange
When electric power is reduced due to the change of the gain of last time, change gain to the direction opposite with last time；And with the increasing after change
The output current value of benefit control Power Generation Section 2.
In step s 11, when being judged as having halt instruction, controller 100 terminates the converter under usual operation mode
The control of circuit 42.
With reference to Fig. 5, exemplify and carried out the rotating speed of the generator 23 in the case of above-mentioned control and (hereinafter referred to as " turn
Speed ".), act on the torque (hereinafter referred to as " torque " of generator 23.) and generator 23 export the first AC power
(hereinafter referred to as " output power ".) behavior.
Fig. 5 is the graph of the relation and the relation of rotating speed and output power that schematically show rotating speed and torque.Transverse axis
Represent the size of rotating speed, the longitudinal axis represents the size of torque or output power.Data D1, D2, D3, the D4's being represented by dotted lines is each
Show to make the energy (such as energy of current) that generator 23 rotates as the rotating speed in the case of fixed and the pass of torque
System.As from data D4 sides towards data D1 sides, energy becomes larger.The data D8 represented with chain-dotted line shows identical with data D1
Under conditions of rotating speed and output power relation.Data D5, D6, the D7 represented using solid line it is each be show above-mentioned gain as
The graph of the relation of rotating speed and torque in the case of fixed.Data D1, D2, D3, D4, D5, D6, D7 are actually curve
Shape, but linearly to illustrate on illustrating.
Under conditions of data D1 in the case where setting gain corresponding with data D5, obtain and data D1 and data
The 5 corresponding output power of rotational speed omega that D5 intersects.Under conditions of data D1, the situation of gain corresponding with data D6 is being set
Under, obtain 6 corresponding output power of the rotational speed omega intersected with data D1 and data D6.Under conditions of data D1, setting with
In the case of the corresponding gains of data D7,7 corresponding output power of the rotational speed omega intersected with data D1 and data D7 is obtained.
Data D6 shows gain and above-mentioned maximization gain unanimous circumstances, therefore data D8 becomes in rotational speed omega 6
It is maximum.Data D5 shows that gain is less than the situation of above-mentioned maximization gain, and data D7 shows that gain is more than above-mentioned maximization gain
Situation.
In above-mentioned steps S04,06, the either step of S07, when the gain for making data D5 increases to the gain of data D6
When, output power increases as shown in data D8.Therefore, it is judged as that the first AC power increases in the step S05 of next time
Add, increase gain again in step S06.As a result, for example when the gain for making data D6 increases to the gain of data D7, first
AC power is reduced as shown in data D8.Therefore, it is judged as that the first AC power is reduced in the step S05 of next time,
Gain is reduced again in step S07.As a result, for example when the gain for making data D7 is reduced to the gain of data D6, first hands over
Galvanic electricity power increases again as shown in data D8.So, gain is close to above-mentioned maximization gain, Power Generation Section 2 it is defeated
Go out current value close to above-mentioned maximization current value.
(control sequence of the inverter circuit under usual operation mode)
Then, the control sequence of the inverter circuit 52 under usual operation mode is exemplified.Before the order, it is assumed that straight
The desired value of stream busbar voltage is set to predetermined value (hereinafter referred to as " a reference value ".).
As shown in fig. 6, step S21 is first carried out in controller 100.In the step s 21, busbar voltage target value calculating portion
311 obtain the detected value of system voltage from system voltage sensor 58.
Then, controller 100 performs step S22.In step S22, busbar voltage target value calculating portion 311 is confirmed in step
Whether the detected value of the system voltage obtained in rapid S21 more than above-mentioned adjusting starts threshold value.
In step S22, when the detected value for being judged as system voltage starts threshold value not less than above-mentioned adjusting, controller
100 perform step S23.In step S23, the desired value of DC bus-bar voltage is set to by busbar voltage target value calculating portion 311
Said reference value.
In step S22, when the detected value for being judged as system voltage starts threshold value more than above-mentioned adjusting, controller 100
Perform step S24.In step s 24, busbar voltage target value calculating portion 311 sets direct current mother according to the detected value of system voltage
The desired value of line voltage.For example, the detected value of 311 computing system voltage of busbar voltage target value calculating portion starts with above-mentioned adjusting
The value proportional to the difference is added to said reference value by the difference of threshold value.
Then, controller 100 performs step S25.In step s 25, output power target value calculating portion 312 is electric from busbar
Pressure sensor 55 obtains the detected value of DC bus-bar voltage.
Then, controller 100 performs step S26.In step S26, output power target value calculating portion 312 is set from inverse
Become the desired value of the second AC power of 52 output of device circuit so that the detection of the DC bus-bar voltage obtained in step s 25
The close desired value calculated in step S23 or step S24 of value.For example, output power target value calculating portion 312 is from current
The deviation that two AC powers are subtracted between detected value and desired value to DC bus-bar voltage implements scale operation or proportional integration
The value of computing etc. calculates the desired value of the second AC power.
Then, controller 100 performs step S27.
In step s 27, raster data model portion 340 so that inverter circuit 52 output power become in step s 25
The mode of the corresponding value of desired value of calculating generates gate drive signal, and exports to the multiple switch element of inverter circuit 52
56。
Then, controller 100 performs step S28.In step S28, usually run the confirmation of operational part 310 is whether there is from the
The halt instruction of two modes switching part 320.In step S28, when being judged as not having halt instruction, controller 100 makes processing
Back to step S21.
After, be repeated make DC bus-bar voltage close to fixed value or it is corresponding with system voltage be worth, until from first
Until pattern switching portion 250 exports halt instruction.
In step S28, when being judged as having halt instruction, controller 100 terminates the inverter under usual operation mode
The control of circuit 52.
(control sequence for rising the converter circuit under suppression mode)
Then, the control sequence for rising the converter circuit 42 under suppression mode is exemplified.
As shown in fig. 7, step S31 is first carried out in controller 100.In step S31, gain correction value calculating part 221 from
Busbar voltage sensor 49 obtains the detected value of DC bus-bar voltage.
Then, controller 100 performs step S32.In step s 32, gain correction value calculating part 221 is according in step
The d-c bus voltage value obtained in S32 calculates gain correction value.
Gain correction value calculating part 221 is in the d-c bus voltage value to obtaining in step s 32 and predetermined threshold value (example
First switching threshold described above) between deviation implement in the value of scale operation or proportional integration computing etc. plus 1, calculating is more than
1 gain correction value.
Then, controller 100 performs step S33.In step S33, inhibit gain calculating part 222 to above-mentioned usual gain
(the newest gain for being stored in gain storage part 215) carries out the amendment using the gain correction value calculated in step s 32, meter
Calculate the gain of torque settings.
Gain is calculated for example, inhibiting gain calculating part 222 and gain correction value being multiplied by usual gain.When usual gain with it is upper
State maximize gain it is approximate consistent when, by the multiplying of gain correction value, the difference of gain and above-mentioned maximization gain with
Usual operation mode ratio becomes larger.Inhibiting gain calculating part 222 can be removed by being stored in the newest gain of gain storage part 215
Gain is calculated with gain correction value.The difference of gain and above-mentioned maximization gain becomes larger with usual operation mode ratio as a result,.
Then, controller 100 performs step S34.In step S34, torque instruction calculating part 230 is from speed probe 24
Obtain the testing result of the rotating speed of generator 23.
Then, controller 100 performs step S35.In step s 35, torque instruction calculating part 230 is based in step S33
The gain of middle calculating and the testing result calculating torque command value of the rotating speed obtained in step s 35.For example, torque instruction calculates
Portion 230 carries out the testing result of rotating speed square, herein on be multiplied by gain calculating torque command value.
Then, controller 100 performs step S36.In step S36, raster data model portion 240 is so that the output of Power Generation Section 2
The mode that current value becomes value corresponding with the torque instruction value calculated in step s 35 generates gate drive signal, and exports
To the multiple switch element 47 of converter circuit 42.
Then, controller 100 performs step S37.In step S37, rise and inhibit the confirmation of operational part 220 is whether there is from the
The halt instruction in one pattern switching portion 250.
In step S37, when being judged as not having halt instruction, controller 100 makes processing return to step S31.
After, halt instruction position is exported to from first mode switching part 250, following action is repeated：According to direct current
Busbar voltage is calculated gain correction value and carrys out modified gain and controlled with revised gain to generate electricity using the gain correction value
The output current value in portion 2.
In step S37, when being judged as having halt instruction, controller 100 terminates to rise the converter under suppression mode
The control of circuit 42.
With reference to Fig. 8, exemplify and carried out the rotating speed of the generator 23 in the case of above-mentioned control and (hereinafter referred to as " turn
Speed ".), act on the torque (hereinafter referred to as " torque " of generator 23.) and generator 23 export the first AC power (with
Down referred to as " output power ".) behavior.
Fig. 8 is to schematically show the relation of rotating speed and torque and the relation of rotating speed and output power in the same manner as Fig. 5
Graph.In the same manner as Fig. 5, each of data D1, D2, D3, D4 being represented by dotted lines shows to revolve generator 23
The energy (such as energy of current) turned is the rotating speed and the relation of torque in the case of fixed.In the same manner as Fig. 5, with chain-dotted line
The data D8 of expression is shown in the relation with data D1 rotating speeds under the same conditions and output power.The number represented with solid line
Each according to D11, D12, D13 is to show above-mentioned gain for the rotating speed and the graph of the relation of torque in the case of fixed.
Data D11 shown a case that with the usual gain calculating torque command value consistent with above-mentioned maximization gain, because
This becomes maximum in data D11 and data D1 11 times data D8 of rotational speed omega intersected.
Data D12 shows to be multiplied by gain correction value and the feelings of modified gain calculating torque command value in usual gain
Condition.By being multiplied by gain correction value in usual gain, the slope of data D12 is more than the slope of data D11, therefore data D12
Rotational speed omega 11 is compared with the rotational speed omega 12 of the intersection point of data D1 and is located at diagram left side.Therefore, rotational speed omega 12 is compared with rotational speed omega 11,
Data D8 becomes smaller.
Data D13 is shown with from the feelings of usual gain divided by gain correction value and modified gain calculating torque command value
Condition.From usual gain divided by gain correction value, thus the slope of data D13 is less than data D11, therefore data D13 and data D1
Intersection point rotational speed omega 13 compared to rotational speed omega 11 be located at diagram right side.Therefore, compared with rotational speed omega 11, data D8 becomes rotational speed omega 13
It is small.
In this way, multiplying or division arithmetic by implementing gain correction value to usual gain in step S33, thus
Gain is away from gain is maximized, and the output current value of Power Generation Section 2 is away from above-mentioned maximization current value, so as to which output power becomes smaller.
(control sequence for rising the inverter circuit under suppression mode)
Then, the control sequence for rising the inverter circuit 52 under suppression mode is exemplified.
As shown in figure 9, step S41 is first carried out in controller 100.In step S41, output power target value calculating portion
331 obtain the detected value of system voltage from system voltage sensor 58.
Then, controller 100 performs step S42.In step S42, output power target value calculating portion 331 is to reduce
The mode of system voltage calculates the desired value of the second AC power exported from inverter circuit 52.For example, output power desired value
Calculating part 331 from the second current output power subtract to the detected value of system voltage obtained in step S41 with it is predetermined
Deviation between threshold value (such as above-mentioned second switching threshold) implements the value of scale operation or proportional integration computing etc., to calculate the
The desired value of two output powers.
Then, controller 100 performs step S43.In step S43, raster data model portion 340 is so that inverter circuit 52
The mode that output power becomes value corresponding with the desired value calculated in step S42 generates gate drive signal, and exports
To the multiple switch element 56 of inverter circuit 52.
Then, controller 100 performs step S44.In step S44, rise and inhibit the confirmation of operational part 330 is whether there is from the
The halt instruction of two modes switching part 320.In step S44, when being judged as not having halt instruction, controller 100 makes processing
Back to step S41.
After, it is repeated in a manner of reducing system voltage and adjusts the second AC power, until switching from first mode
Until portion 250 exports halt instruction.
In step S44, when being judged as having halt instruction, 100 end of controller processing.
(transfer sequence of control model)
Then, the transfer sequence of the control model in controller 100 is illustrated.Figure 10, which is shown, switches usual operation mode
To rise suppression mode arrive will rise suppression mode back to usual suppression mode order.
As shown in Figure 10, step S51 is first carried out in controller 100.In step s 51, first mode switching part 250 is from mother
Line voltage sensor 49 obtains the detected value of DC bus-bar voltage, confirms whether the detected value is more than above-mentioned first switching threshold.
Controller 100 performs step S51 repeatedly, until the detected value of DC bus-bar voltage is more than the first switching threshold.
In step s 51, when the detected value for being judged as DC bus-bar voltage is more than the first switching threshold, controller 100
Perform step S52.In step S52, first mode switching part 250 operates the control model of the first controller 200 from usual
Pattern switching is to rising suppression mode.For example, first mode switching part 250 sends out halt instruction (instruction for stopping calculating gain)
To usual operation operational part 210, sign on (instruction for starting calculating gain) is issued into rising and inhibits operational part 220.As a result,
The control sequence of step S01~S12 is switched to the control sequence of step S31~S37 by controller 100.
Then, controller 100 performs step S53.In step S53, first mode switching part 250 is sensed from busbar voltage
Whether device 49 obtains the detected value of DC bus-bar voltage, confirm the detected value less than above-mentioned first switching threshold.
In step S53, when the detected value for being judged as DC bus-bar voltage is not less than the first switching threshold, controller
100 perform step S54.In step S54, second mode switching part 320 obtains system voltage from system voltage sensor 58
Whether detected value confirms the detected value more than the second switching threshold.
In step S54, when the detected value for being judged as system voltage is not less than the second switching threshold, controller 100 will
Processing returns to step S53.
In step S54, when the detected value for being judged as system voltage is more than the second switching threshold, controller 100 performs
Step S55.In step S55, second mode switching part 320 is by the control model of second controller 300 from usual operation mode
Switch to rising suppression mode.For example, halt instruction is issued usually operation operational part 310 by second mode switching part 320, will open
Begin to instruct and issue rising inhibition operational part 330.The control sequence of step S21~S28 is switched to step by controller 100 as a result,
The control sequence of S41~S44.
Then, controller 100 performs step S56.In step S56, second mode switching part 320 is sensed from system voltage
Whether device 58 obtains the detected value of system voltage, confirm the detected value less than the second switching threshold.Controller 100 performs step repeatedly
Rapid S56, until the detected value of system voltage is less than the second switching threshold.
In step S56, when the detected value for being judged as system voltage is less than the second switching threshold, controller 100 performs
Step S57.In step S57, second mode switching part 320 by the control model of second controller 300 from rise suppression mode
Switch to usual operation mode.For example, sign on is issued usually operation operational part 310 by second mode switching part 320, will stop
Only rising inhibition operational part 330 is issued in instruction.The control sequence of step S41~44 is switched to step by controller 100 as a result,
The control sequence of S21~S28.
After step S57 is performed, controller 100 returns process to step S53.It is straight when being judged as in step S53
When flowing the detected value of busbar voltage less than the first switching threshold, controller 100 performs step S58.In step S58, the first mould
The control model of first controller 200 is switched to usual operation mode by formula switching part 250 from suppression mode is risen.For example, the
Sign on is issued usually operation operational part 210 by one pattern switching portion 250, and halt instruction is issued rising inhibits operational part
220.The control sequence of step S31~S37 is switched to the control sequence of step S01~S12 by controller 100 as a result,.
More than, usual operation mode is switched into rising suppression mode, until suppression mode will be risen back to usually inhibition
The order of pattern is completed.As illustrated in the order, second mode switching part 320 is in first mode switching part 250 by the
The control model of one controller 200 is after usual operation mode switches to rising suppression mode, by the control of second controller 300
Molding formula switches to rising suppression mode from usual operation mode.In other words, controller 100 is controlled in the case where rising suppression mode turns
Converter circuit 42 with compared with usual operation mode increase Power Generation Section 2 output current value with maximize current value difference it
Afterwards, inverter circuit 52 is controlled to reduce the second AC power compared with usual operation mode.
First mode switching part 250 presses down the control model of second controller 300 from rising in second mode switching part 320
Molding formula is switched to after usual operation mode, by the control model of the first controller 200 from rise suppression mode switch to it is logical
Normal operation mode.In other words, controller 100 terminates to hand over to reduce second compared with usual operation mode in the case where rising suppression mode
After the mode of galvanic electricity power controls inverter circuit 52, terminate to increase the output electricity of Power Generation Section 2 compared with usual operation mode
The mode of difference of the flow valuve with maximizing current value controls converter circuit 42.
(effect of present embodiment)
Electricity generation system 1 includes：Power Generation Section 2 utilizes the first AC power of energy production of liquid flow；Converter circuit 42,
First AC power is transformed to direct current power；Direct current power is transformed to after the second AC power at least by inverter circuit 52
It exports and gives electric system PS；Controller 100 is configured under usual operation mode, and control converter circuit 42 is so that Power Generation Section 2
The maximization current value that is become maximum close to the first AC power of output current value, in the case where rising suppression mode, control conversion
Device circuit 42 with compared with usual operation mode increase Power Generation Section 2 output current value with maximize current value difference, be
In the case that system voltage rises, usual operation mode is switched into rising suppression mode.
When system voltage rises, there is a situation where that requirement inhibits to supply electric power to electric system PS.In contrast, if
Only inhibit the second AC power exported from inverter circuit 52, then need converter circuit 42 and inverter circuit 52 it
Between consumption from converter circuit 42 export the first AC power remainder.Converter circuit 42 and inverter circuit 52 it
Between power consumption there is a situation where the large-scale resistor of requirement, become the principal element of device enlargement.
In contrast, controller 100 is configured to：Converter circuit 42 is controlled under usual operation mode so that Power Generation Section 2
The maximization current value that is become maximum close to the first AC power of output current value, control converter in the case where rising suppression mode
Circuit 42 compared with usual operation mode to increase difference of the output current value of Power Generation Section 2 with maximizing current value, in system
In the case that voltage rises, usual operation mode is switched into rising suppression mode.By the control for carrying out usual operation mode
System, the first AC power are maintained near maximum.In other words, the first AC power be retained as can by increase or
The state for reducing the output current value of Power Generation Section 2 and reducing.In the case where system voltage rises, pass through usual operation mode quilt
Rising suppression mode is switched to, the first AC power becomes smaller.In this way, when system voltage rises, by being carried out reduction first
The control of AC power sets the necessity of large-scale resistor to be lower for consumption electric power.Therefore, it is possible to big in restraining device
Flexible adaptation inhibits the requirement of supply of electric power while type.Therefore, be conducive to improve the adaptability to electric system PS.
In addition, in the power generation using the energy of liquid flow, by the flow path of liquid from the rotary body 21 by Power Generation Section 2
Flow path switches to the flow path (hereinafter referred to as " bypass flow path " without the rotary body 21 of Power Generation Section 2.), it thus can also reduce first
AC power.But there are the feelings that the place without bypass flow path is arranged in small water channel in rotary body 21
Condition.In this case, it is also to have by the composition for adjusting to reduce the first AC power of the output current value of Power Generation Section 2
Benefit.
Controller 100 is configured to make in the case where rising suppression mode the output current value of Power Generation Section 2 to be more than maximization electricity
Flow valuve.When reducing the output current value of Power Generation Section 2, become smaller due to acting on the torque of generator 23 of Power Generation Section 2, send out
The rotation high speed of motor 23.Further, since the rotation high speed of generator 23, high electricity is inputted to converter circuit 42
Pressure.Therefore, high durability is required both mechanical system and electric system.In contrast, when the output electricity of increase Power Generation Section 2
During flow valuve, since the torque for acting on generator 23 becomes larger, the rotation low speed of generator 23.Therefore, mechanical system and
The requirement of durability in electric system is lower.Therefore, it is possible to inhibit the importing cost of electricity generation system 1.
Controller 100 is configured to：In the case where rising suppression mode control converter circuit 42 with usual operation mode
Compared to the output current value of increase Power Generation Section 2 with after the difference of maximization current value, also controlling and performing inverter circuit 52, with
Reduce the second AC power compared with usual operation mode.In the case, the second friendship is being reduced compared with usual operation mode
Before the control (hereinafter referred to as " second inhibits control ") of galvanic electricity power, carried out reducing the first exchange compared with usual operation mode
The control (hereinafter referred to as " first inhibits control " of electric power.), the necessity for being accordingly used in the resistor of power consumption further becomes
It is low.
Controller 100 is configured to：The control of inverter circuit 52 is further performed under usual operation mode, with root
Increase DC bus-bar voltage according to the rising of system voltage, before system voltage reaches the second switching threshold (first threshold), root
Usual operation mode is switched into rising suppression mode according to the rising of DC bus-bar voltage, in the case where rising suppression mode, control turns
Converter circuit 42 with compared with usual operation mode increase Power Generation Section 2 output current value with maximize current value difference it
Afterwards, in the case where system voltage is more than the second switching threshold, inverter circuit 52 is controlled, to subtract compared with usual operation mode
Small second AC power.In the case, the letter by the way that the rising of DC bus-bar voltage to be used as representing the rising of system voltage
Number, it can realize that performing first before second inhibits control inhibits control with simple formed.In addition, according to system voltage
Rise the distortion that DC bus-bar voltage rising is made to also contribute to inhibit the second AC power.
(variation of embodiment)
Above-mentioned maximization gain also can be by being used for trial operation or the export in advance such as simulation that condition proposes.Such as in above-mentioned step
As being illustrated in rapid S01~S12, can not perform makes gain close to the control for maximizing gain, and will it is derived in advance most
Bigization gain is used as fixed value.In the case, when making the energy variation of the rotation of generator 23, the rotating speed of generator 23 occurs
Variation, correspondingly torque instruction value is changed.That is, according to make generator 23 rotate energy variation, Power Generation Section 2 it is defeated
Go out current value to be changed, close to maximization current value.
As Figure 11 is illustrated, the order wire 15 for transferring the information related with system voltage can be arranged on first
Between controller 200 and second controller 300.In the case, by using order wire 15, can be illustrated according to Figure 12 suitable
Sequence performs the switching of control model.
First, controller 100 performs step S61.In step S61, first mode switching part 250 via order wire 15 from
More than predetermined threshold value (hereinafter referred to as whether second controller 300 obtains the information related with system voltage, confirm system voltage
" the 3rd switching threshold ".).3rd switching threshold can be identical with the second switching threshold.Controller 100 is more than the in system voltage
Step S61 is performed until three switching thresholds repeatedly.
In step S61, when being judged as that system voltage is more than three switching thresholds, controller 100 performs step S62.
In step S62, in the same manner as step S52, first mode switching part 250 is by the control model of the first controller 200 from usual
Operation mode switches to rising suppression mode.
Then, controller 100 performs step S63.In step S63, second mode switching part 320 waits the predetermined time
By.
Then, controller 100 performs step S64.In step S64, second mode switching part 320 is sensed from system voltage
Device 58 obtains the information related with system voltage, confirms whether system voltage is less than the 3rd switching threshold.
In step S64, when being judged as that system voltage is not less than three switching thresholds, controller 100 performs step
S65.In step S65, in the same manner as step S55, second mode switching part 320 by the control model of second controller 300 from
Usual operation mode switches to rising suppression mode.
Then, controller 100 performs step S66.In step S66, second mode switching part 320 is sensed from system voltage
Whether device 58 obtains the detected value of system voltage, confirm the detected value less than the 3rd switching threshold.Controller 100 is in system voltage
Detected value less than performing step S66 repeatedly until the 3rd switching threshold.
In step S66, when the detected value for being judged as system voltage is less than three switching thresholds, controller 100 performs
Step S67.In step S67, in the same manner as step S57, second mode switching part 320 is by the control mould of second controller 300
Formula switches to usual operation mode from suppression mode is risen.
Then, controller 100 performs step S68.In step S64, when be judged as system voltage less than the 3rd switching threshold
During value, controller 100 does not perform step S65, S66, S67 and processing is made to proceed to step S68.In step S68, with step
Similarly, first mode switching part 250 switches to the control model of the first controller 200 usually from suppression mode is risen to S58
Operation mode.
More than, usual operation mode is switched to rising suppression mode will extremely rise suppression mode back to usually inhibition mould
The order of formula is completed.Even if in this sequence, second mode switching part 320 in first mode switching part 250 by the first controller
200 control model from usual operation mode switch to rise suppression mode after, by the control model of second controller 300 from
Usual operation mode switches to rising suppression mode.In other words, controller 100 in the case where rising suppression mode with usual operational mode
After formula controls converter circuit 42 compared to the output current value of increase Power Generation Section 2 and the mode of the difference of maximization current value,
Inverter circuit 52 is controlled, to reduce the second AC power compared with usual operation mode.
The control model of second controller 300 is switched to usually from suppression mode is risen in second mode switching part 320
After operation mode, first mode switching part 250 switches to the control model of the first controller 200 from rising suppression mode logical
Normal operation mode.In other words, controller 100 terminates to hand over to reduce second compared with usual operation mode in the case where rising suppression mode
After the mode of galvanic electricity power controls inverter circuit 52, terminate to increase the output electricity of Power Generation Section 2 compared with usual operation mode
The mode of difference of the flow valuve with maximizing current value controls converter circuit 42.
In the case where rising suppression mode, above-mentioned second can be performed before above-mentioned first inhibits control and inhibit control.For example,
First can be performed when the execution that DC bus-bar voltage inhibits control due to second rises inhibit control.
More than, embodiment is illustrated, but this invention is not necessarily limited to above-mentioned embodiment, can not taken off
From being made various changes in the range of its purport.
Symbol description
1 ... electricity generation system, 2 ... Power Generation Sections, 3 ... power conversion systems, PS ... electric system, 42 ... converter circuits (
One power converter portion), 52 ... inverter circuits (the second power converter portion), 100 ... controllers, 4 ... converter units (electric power become
Changing device).
Claims (7)
1. a kind of electricity generation system, including：
Power Generation Section, the Power Generation Section utilize the first AC power of energy production of fluid stream；
First AC power is transformed to direct current power by the first power converter portion, the first power converter portion；
The direct current power is transformed to the second AC power by the second power converter portion, the second power converter portion, and at least
It is output to electric system；And
Control unit, the control unit are configured to：The first power converter portion is controlled under usual operation mode so that described
The maximization current value that the output current value of Power Generation Section becomes maximum close to first AC power, in the case where rising suppression mode
The first power converter portion is controlled to increase output current value and the institute of the Power Generation Section compared with the usual operation mode
The difference for maximizing current value is stated, in the case where the voltage of the electric system rises, the usual operation mode is cut
Shift to the rising suppression mode.
2. electricity generation system as described in claim 1, wherein,
The control unit is configured to：Make under the rising suppression mode Power Generation Section output current value be more than it is described most
Big galvanic current value.
3. electricity generation system as claimed in claim 1 or 2, wherein,
The control unit is also configured to：The first power converter portion is controlled to lead to described under the rising suppression mode
After normal operation mode is compared to the output current value and the difference of the maximization current value for increasing the Power Generation Section, described in control
Second power converter portion, to reduce second AC power compared with the usual operation mode.
4. electricity generation system as claimed in claim 3, wherein, the control unit is configured to：
The second power converter portion is also controlled under the usual operation mode, with the upper of the voltage according to the electric system
It rises and increases and inputted from the first power converter portion to the DC voltage in the second power converter portion,
Before the voltage of the electric system reaches first threshold, according to the rising of the DC voltage by the usual fortune
Rotary-die type switches to the rising suppression mode,
Under the rising suppression mode, the first power converter portion is being controlled with the increase compared with the usual operation mode
The output current value of the Power Generation Section is with being more than institute in the voltage of the electric system after the difference of the maximization current value
In the case of stating first threshold, the second power converter portion is controlled, with reduction described the with the usual operation mode compared with
Two AC powers.
5. a kind of power conversion system, including：
The first AC power generated in Power Generation Section is transformed to direct current by the first power converter portion, the first power converter portion
Electric power；
The direct current power is transformed to the second AC power by the second power converter portion, the second power converter portion, and at least
It exports to electric system；
Control unit, the control unit are configured to：The first power converter portion is controlled under usual operation mode so that described
The maximization current value that the output current value of Power Generation Section becomes maximum close to first AC power, in the case where rising suppression mode
The first power converter portion is controlled to increase output current value and the institute of the Power Generation Section compared with the usual operation mode
The difference for maximizing current value is stated, switches the usual operation mode in the case where the voltage of the electric system rises
To the rising suppression mode.
6. a kind of power-converting device, including：
First power converter portion, the first power converter portion are arranged between Power Generation Section and electric system, will be in the hair
The first AC power generated in electric portion is transformed to direct current power；
Control unit, the control unit are configured to：The first power converter portion is controlled under usual operation mode so that described
The maximization current value that the output current value of Power Generation Section becomes maximum close to first AC power, in the case where rising suppression mode
The first power converter portion is controlled to increase output current value and the institute of the Power Generation Section compared with the usual operation mode
The difference for maximizing current value is stated, switches to the usual operation mode in the case where the voltage of the electric system rises
The rising suppression mode.
7. a kind of electric power conversion method, including：
The first power converter portion is controlled, the first AC power exported from Power Generation Section is transformed to direct current power；
The second power converter portion is controlled, is exported after the direct current power is transformed to the second AC power to electric system；With
And
The first power converter portion is controlled under usual operation mode so that the output current value of the Power Generation Section is described in
The maximization current value that first AC power becomes maximum controls the first power converter portion to increase in the case where rising suppression mode
The difference of the output current value of the big Power Generation Section and the maximization current value, rises in the voltage of the electric system
In the case of, the usual operation mode is switched into the rising suppression mode.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2016-229361 | 2016-11-25 | ||
| JP2016229361A JP6451722B2 (en) | 2016-11-25 | 2016-11-25 | Power generation system, power conversion system, power conversion device, and power conversion method |
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| Publication Number | Publication Date |
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| CN108110788A true CN108110788A (en) | 2018-06-01 |
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| CN201711183841.0A Withdrawn CN108110788A (en) | 2016-11-25 | 2017-11-23 | Electricity generation system, power conversion system, power-converting device and electric power conversion method |
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| CN (1) | CN108110788A (en) |
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| CN111239534A (en) * | 2020-03-19 | 2020-06-05 | 广东电网有限责任公司电力科学研究院 | MMC-based high-capacity wind turbine generator system power grid adaptability integrated test system |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104617584A (en) * | 2015-02-12 | 2015-05-13 | 阳光电源股份有限公司 | Full power wind power system grid fault ride-through method and device |
| CN105633999A (en) * | 2014-11-04 | 2016-06-01 | 国家电网公司 | High-voltage crossing control method and device under imbalanced sudden rise of power grid voltage |
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| JP3311424B2 (en) * | 1993-05-24 | 2002-08-05 | 三洋電機株式会社 | Power control method and power control device for photovoltaic power generation system |
| JP4220973B2 (en) * | 2005-02-28 | 2009-02-04 | 三菱重工業株式会社 | Wind power generator and control method for wind power generator |
| JP4835978B2 (en) * | 2005-03-18 | 2011-12-14 | 株式会社安川電機 | Wind turbine generator control method and apparatus |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105633999A (en) * | 2014-11-04 | 2016-06-01 | 国家电网公司 | High-voltage crossing control method and device under imbalanced sudden rise of power grid voltage |
| CN104617584A (en) * | 2015-02-12 | 2015-05-13 | 阳光电源股份有限公司 | Full power wind power system grid fault ride-through method and device |
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| Title |
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| LIU CHANGXIAN等: "High Voltage Ride-Through of Grid-side Converter for PMSG Based Directly Driven Wind Turbines", 《PROCEEDINGS OF THE 35TH CHINESE CONTROL CONFERENCE》 * |
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| Publication number | Publication date |
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| JP2018085902A (en) | 2018-05-31 |
| JP6451722B2 (en) | 2019-01-16 |
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