CN201774272U - Double-fed wind power converter pwm controller - Google Patents

Double-fed wind power converter pwm controller Download PDF

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Publication number
CN201774272U
CN201774272U CN2010205048678U CN201020504867U CN201774272U CN 201774272 U CN201774272 U CN 201774272U CN 2010205048678 U CN2010205048678 U CN 2010205048678U CN 201020504867 U CN201020504867 U CN 201020504867U CN 201774272 U CN201774272 U CN 201774272U
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unit
interface unit
power supply
double
power
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Expired - Fee Related
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CN2010205048678U
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Chinese (zh)
Inventor
裴景斌
周维来
孙敬华
张哲�
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Harbin Jiuzhou Electrical Technology Co.,Ltd.
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Harbin Jiuzhou Electric Co Ltd
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    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02EREDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E40/00Technologies for an efficient electrical power generation, transmission or distribution
    • Y02E40/30Reactive power compensation

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Abstract

A double-fed wind power converter PWM controller comprises an analog signal conditioning unit, a DSP unit, a CPLD interface unit, an optical fiber interface unit, a system power supplying and power detecting unit, a direct-current bus over-voltage detection unit and a CANBUS interface unit. The analog signal conditioning unit is in electric signal connection with the DSP unit, the DSP unit is respectively in electric signal connection with the CANBUS interface unit and the CPLD interface unit, the CPLD interface unit is respectively in electric signal connection with the direct-current bus over-voltage detection unit and the optical fiber interface unit, and the system power supplying and power detecting unit supplies power to the controller. The controller adopts space vector PWM control with directional voltage of a power grid, realizes four-quadrant running of a converter on the power grid side, adopts a feed-forward control decoupling strategy, realizes respective control with and without power, and realizes synchronization of double-fed motor stator electronic voltage and power grid voltage before grid connection, and generation power control of a generator after grid connection.

Description

Double-fed fan motor current transformer PWM controller
(1) technical field
The utility model belongs to technical field of wind power generation, is specifically related to a kind of double-fed fan motor current transformer PWM controller.
(2) background technology
The double-fed wind power generator group is by wind wheel, gear box, braking mechanism, generator, pylon, control system and current transformer are formed, the double-fed fan motor current transformer is the energy conversion link of wind turbine generator, its main effect be under the situation of metasynchronism for rotor provides frequency, amplitude, the alternating current that phase place is all variable, the frequency of under supersynchronous situation rotor being sent, all variable alternating current of amplitude, phase place become and electrical network frequency together, the same width of cloth, the alternating current of homophase is connected to the grid.The PWM controller is the core of double-fed fan motor current transformer, and the stable operation of current transformer is played decisive role.
(3) summary of the invention
Current transformer is the important component part of double-fed wind power generator group, and current transformer PWM controller is the very important control of current transformer core.For satisfying the requirement of wind turbine generator long-time steady operation under the unattended operation situation, the major function of net side PWM controller is exactly surely hold dc bus stable, the major function of pusher side PWM controller videlicet time response controller of fan order, to greatest extent to the electrical network conveying capacity.This wind electric converter PWM controller is for satisfying above-mentioned requirements design.
In order to achieve the above object, the technical scheme of the utility model patent is as follows: a kind of double-fed fan motor current transformer PWM controller, comprise the analog signal conditioner unit, the DSP unit, the CPLD interface unit, the optical fiber interface unit, system's power supply and power supply detecting unit, dc bus overvoltage detecting unit and CANBUS interface unit, the analog signal conditioner unit is connected with the DSP unit signal of telecommunication, the DSP unit respectively with the CANBUS interface unit, the CPLD interface unit signal of telecommunication connects, the CPLD interface unit is connected with the dc bus overvoltage detecting unit signal of telecommunication, the CPLD interface unit is connected with the optical fiber interface unit signal of telecommunication, and system's power supply and power supply detecting unit are the power supply of this controller.
The utility model also has following feature:
1, described DSP unit employing is the TMS320F2812 chip;
2, described analog signal conditioner unit connects the INA157 circuit by the high-accuracy differential amplifier INA128 circuit signal of telecommunication and forms;
What 3, described CPLD interface unit adopted is the EPM570 chip;
What 4, power supply of described system and power supply detecting unit adopted is the TPS70351 power supply chip;
5, described dc bus overvoltage detecting unit alarm threshold is that pusher side is set 1225V, and the net side is set 1250V, adopts LM339 as voltage comparator.
The utlity model has following advantage:
Adopt the space vector PWM control of line voltage orientation, realize the four quadrant running of grid side current transformer, adopt feedfoward control decoupling zero strategy, realize meritorious idle control respectively; Double feedback electric engine stator electronic voltage and line voltage are synchronously and the generated output control of the back generator that is incorporated into the power networks before realizing being incorporated into the power networks by rotor-side converter; Supply voltage monitoring function and DC bus-bar voltage monitoring function have been realized.
(4) description of drawings:
Fig. 1 is the former road of a double-fed fan motor current transformer PWM controller block diagram; Wherein 1, the analog signal conditioner unit, 2, the DSP unit, 3, the CPLD interface unit, 4, the optical fiber interface unit, 5, system's power supply and power supply detecting unit, 6, dc bus overvoltage detecting unit, 7, the CANBUS interface unit;
Fig. 2 is analog signal conditioner element circuit figure;
Fig. 3 is system's power supply and power supply detection cell circuit figure;
Fig. 4 is dc bus overvoltage detection cell circuit figure;
Fig. 5 is a CANBUS interface unit circuit diagram.
(5) embodiment
For a more detailed description below in conjunction with Fig. 1 to Fig. 5 to the utility model:
A kind of double-fed fan motor current transformer PWM controller, comprise the analog signal conditioner unit, the DSP unit, the CPLD interface unit, the optical fiber interface unit, system's power supply and power supply detecting unit, dc bus overvoltage detecting unit and CANBUS interface unit, the analog signal conditioner unit is connected with the DSP unit signal of telecommunication, the DSP unit respectively with the CANBUS interface unit, the CPLD interface unit signal of telecommunication connects, the CPLD interface unit is connected with the dc bus overvoltage detecting unit signal of telecommunication, the CPLD interface unit is connected with the optical fiber interface unit signal of telecommunication, and system's power supply and power supply detecting unit are the power supply of this controller.
The analog signal of adopting by instrument transformer or Hall element arrives the analog signal conditioner unit of PWM controller through signal regulating panel, and signal becomes DSP unit acceptable 0~3V voltage signal after through the analog signal conditioner unit, and this signal is a feedback signal.The DSP unit goes out the pwm signal of corresponding duty ratio according to given signal and feedback signal by the calculated with mathematical model of controlled device.This pwm signal arrives the driving circuit section of IGBT, the turn-on and turn-off of control IBGT through CPLD interface unit and optical fiber interface unit.System power supply and power supply detecting unit are responsible for the whether detection in normal range (NR) of the power supply of entire controller and power supply.Dc bus overvoltage detecting unit is responsible for detecting dc bus whether in normal range (NR).The CANBUS interface unit is responsible for the communication of controller and other parts of current transformer.This controller both can also can be used as double-feed current transformer pusher side PWM controller as double-feed current transformer net side PWM controller by the different program of programming.
As shown in Figure 1, the utility model is to be the core dsp processor with TMS320F2812, and this processor inside carries 12 16 road high-speed ADCs, can satisfy the needs that this controller data is gathered fully.The analog signal of returning through sensor acquisition is given the AD collecting part of processor through signal conditioning circuit, processor is gathered by the timer down trigger AD in the task manager, is used to the vector control computing after the analog data process Q format conversion that collects.The vector control calculated result is to produce the PWM waveform, gives the optical fiber interface unit after this waveform process CPLD interface unit handles, is used to drive IPM.IPM itself is from the tape error inverse signal; the excess-current excess-temperature fault appears in IPM in the undesired or running of back IPM state if power on; will return a rub-out signal by optical fiber; behind this signal process CPLD interface unit; deliver to the power protection interrupt pin of DSP, this pin senses is blocked IPM automatically after rub-out signal.The kernel of TMS320F2812 and IO mouth need 1.8V and two power supplys of 3.3V respectively, what power unit adopted is the TPS70351 power supply chip, this chip can be exported 1.8V and two kinds of power supplys of 3.3V, can satisfy the requirement of processor to electric sequence simultaneously, can also export one tunnel reset signal simultaneously.TMS320F2812 carries the CAN2.0B bus, and the speed of this bus can satisfy PWM control and remove the needs of communication between device and the main DSP up to 1M.For preventing that the IPM that causes owing to the dc bus overvoltage behind the DSP program fleet from damaging; this PWM controller also is provided with dc bus hardware over-voltage testing circuit; after DC bus-bar voltage reached the hardware protection value, the signal that this testing circuit is sent blocked pwm signal automatically after the CPLD interface unit handles.
As shown in Figure 2, AC signal behind instrument transformer collection and resistance sampling, be converted to-3V~+ the 3V voltage signal.This signal through first order amplifier INA128 circuit conversion be-3V~+ the 3V voltage signal, through second level amplifier INA157 circuit, 1 pin of INA157 adds+the 1.5V benchmark again, and input voltage is added the ADC passage of exporting to TMS320F2812 behind the 1.5V divided by 2.Direct current signal behind instrument transformer collection and resistance sampling, be converted to 0V~+ the 3V voltage signal, this signal through first order amplifier INA128 circuit conversion be 0V~+ the 3V voltage signal directly gives the ADC passage of TMS320F2812.1.5V reference voltage is by the 1V of TMS320F2812 output, 2V voltage obtains after the amplifier computing.
As shown in Figure 3, because the kernel of TMS320F2812 and IO need 1.8V and two kinds of voltages of 3.3V respectively, so power unit adopts the TPS70351 power supply chip, this chip has input of two-way power supply and the output of two-way power supply, after the 5V power supply arrives the PWM controller, receive the 5V input of TPS70351, produce DSP and the needed 3.3V power supply of other chips.Receive the 5V input of TPS70351 after the 5V power supply process LDO step-down simultaneously, produce the needed 1.8V power supply of DSP.In order to satisfy the needs that AD gathers, the 3.3V power supply that the 5V power supply produces after another one LDO step-down is given the AD collecting part power supply of DSP specially.Control system ± 5V power sense circuit, circuit adopt LM339 as voltage comparator, and input adopts electric resistance partial pressure and 2V reference voltage relatively, this circuit setting voltage error range ± 10%.When power supply exceeds error range, output is high level (the ERROR_P5_N5 end is for high), i.e. power supply alarming signal.
Dc bus over voltage alarm circuit as shown in Figure 4, the circuit alarm thresholding, pusher side is set 1225V, and the net side is set 1250V.Circuit adopts LM339 as voltage comparator, input adopts electric resistance partial pressure, AD4, AD15 are all the DC bus-bar voltage signal, AD4 channel signal and 1.5V reference voltage are relatively, AD15 channel signal and 2V reference voltage compare, and two paths of signals is through exporting at last with a gate logic, promptly when AD4, the overvoltage simultaneously of AD15 two-way measurement result, whole warning circuit output high level (the 2DCOV end is for high), i.e. dc bus over voltage alarm signal.
The CAN interface of TMS320F2812 becomes the CAN signal of difference after CAN transceiver PCA82C250 conversion as shown in Figure 5.

Claims (6)

1. double-fed fan motor current transformer PWM controller, comprise the analog signal conditioner unit, the DSP unit, the CPLD interface unit, the optical fiber interface unit, system's power supply and power supply detecting unit, dc bus overvoltage detecting unit and CANBUS interface unit, it is characterized in that: the analog signal conditioner unit is connected with the DSP unit signal of telecommunication, the DSP unit respectively with the CANBUS interface unit, the CPLD interface unit signal of telecommunication connects, the CPLD interface unit is connected with the dc bus overvoltage detecting unit signal of telecommunication, the CPLD interface unit is connected with the optical fiber interface unit signal of telecommunication, and system's power supply and power supply detecting unit are the power supply of this controller.
2. a kind of double-fed fan motor current transformer PWM controller according to claim 1 is characterized in that: what described DSP unit adopted is the TMS320F2812 chip.
3. a kind of double-fed fan motor current transformer PWM controller according to claim 1 is characterized in that: described analog signal conditioner unit connects the INA157 circuit by the high-accuracy differential amplifier INA128 circuit signal of telecommunication and forms.
4. a kind of double-fed fan motor current transformer PWM controller according to claim 1 is characterized in that: what described CPLD interface unit adopted is the EPM570 chip.
5. a kind of double-fed fan motor current transformer PWM controller according to claim 1 is characterized in that: what power supply of described system and power supply detecting unit adopted is the TPS70351 power supply chip.
6. a kind of double-fed fan motor current transformer PWM controller according to claim 1 is characterized in that: described dc bus overvoltage detecting unit alarm threshold is that pusher side is set 1225V, and the net side is set 1250V, adopts LM339 as voltage comparator.
CN2010205048678U 2010-08-26 2010-08-26 Double-fed wind power converter pwm controller Expired - Fee Related CN201774272U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN2010205048678U CN201774272U (en) 2010-08-26 2010-08-26 Double-fed wind power converter pwm controller

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN2010205048678U CN201774272U (en) 2010-08-26 2010-08-26 Double-fed wind power converter pwm controller

Publications (1)

Publication Number Publication Date
CN201774272U true CN201774272U (en) 2011-03-23

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Application Number Title Priority Date Filing Date
CN2010205048678U Expired - Fee Related CN201774272U (en) 2010-08-26 2010-08-26 Double-fed wind power converter pwm controller

Country Status (1)

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CN (1) CN201774272U (en)

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Owner name: HARBIN JIUZHOU ELECTRICAL TECHNOLOGY CO., LTD.

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Effective date: 20120808

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Effective date of registration: 20120808

Address after: 150028, No. 1, unit D43, building -29, phase three, Shimao new town, Songbei, Harbin, Heilongjiang, Binjiang

Patentee after: Harbin Jiuzhou Electrical Technology Co.,Ltd.

Address before: 150081 Heilongjiang Province, Harbin city Nangang District haping Road No. 162

Patentee before: Jiuzhou Electric Co., Ltd., Harbin

CF01 Termination of patent right due to non-payment of annual fee
CF01 Termination of patent right due to non-payment of annual fee

Granted publication date: 20110323

Termination date: 20190826