CN103457294A - Grid connected wind driven generator controller and control method thereof - Google Patents

Grid connected wind driven generator controller and control method thereof Download PDF

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Publication number
CN103457294A
CN103457294A CN2013104261097A CN201310426109A CN103457294A CN 103457294 A CN103457294 A CN 103457294A CN 2013104261097 A CN2013104261097 A CN 2013104261097A CN 201310426109 A CN201310426109 A CN 201310426109A CN 103457294 A CN103457294 A CN 103457294A
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CN
China
Prior art keywords
unloader
control circuit
control
pwm
wind
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Pending
Application number
CN2013104261097A
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Chinese (zh)
Inventor
荆林峰
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JINAN DEMING POWER EQUIPMENT Co Ltd
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JINAN DEMING POWER EQUIPMENT Co Ltd
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Application filed by JINAN DEMING POWER EQUIPMENT Co Ltd filed Critical JINAN DEMING POWER EQUIPMENT Co Ltd
Priority to CN2013104261097A priority Critical patent/CN103457294A/en
Publication of CN103457294A publication Critical patent/CN103457294A/en
Pending legal-status Critical Current

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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
    • Y02E10/00Energy generation through renewable energy sources
    • Y02E10/70Wind energy
    • Y02E10/76Power conversion electric or electronic aspects

Abstract

The invention relates to a grid connected wind driven generator controller and a control method thereof. The grid connected wind driven generator controller comprises a controller body and unloading devices, the controller body comprises a sampling circuit, a control circuit and a contactor, the unloading devices comprise a PWM unloading device and a three-phase unloading device, the three-phase unloading device is connected with the contactor, and the PWM unloading device is connected with the control circuit. The controller body can stabilize the output voltage of a wind driven generator to guarantee that the other components in the circuit work in an optimal working voltage. When grid electricity is not available, the controller body can be turned off automatically, controls the unloading devices of the wind driven generator to be in a three-phase unloading state, and guarantees the safety of the whole system under a power off situation, and the accident that idle rotating and galloping occur to the wind driven generator due to strong wind under the power off situation cannot occur. The power supply unit of the controller body is connected with grid electricity, a storage battery is saved, and system cost is saved.

Description

A kind of wind power generator incorporated in power network controller and control method thereof
Technical field
The present invention relates to a kind of wind power generator incorporated in power network controller and control method thereof, belong to the wind-driven generator control field.
Background technology
Wind energy is as a kind of clean regenerative resource, its amount of accumulateing is huge, more and more be subject to the attention of countries in the world, the wind power generator incorporated in power network controller is as grid-connected wind generator system major control parts, in grid-connected wind power generation, plays a part and important, but current wind power generator incorporated in power network controller, control circuit adopts storage battery power supply, after the outage of net electricity, because storage battery is still powered to controller, discharged or defective battery, cause the storage battery permanent damages.While running into strong wind weather, wind-driven generator idle running runaway accident easily appears.Can't accurately control the output voltage of wind-driven generator in the fan operation process, thereby can't guarantee that grid-connected wind generator system all parts works under optimum voltage.
Summary of the invention
The present invention is directed to the deficiency that prior art exists, provide a kind of and can guarantee at any time high-efficiency wind-driven power generator safe operation and good wind power generator incorporated in power network controller and the control method thereof of electric supply installation.
The technical scheme that the present invention solves the problems of the technologies described above is as follows: a kind of wind power generator incorporated in power network controller, comprise controller body and unloader, and it is characterized in that: described controller body comprises sample circuit, control circuit and contactor, wherein:
Described sample circuit, for gathering the signal of telecommunication of wind-driven generator output, and be sent to control circuit;
Described control circuit, the signal of telecommunication collected for reception, and the signal of telecommunication collected is changed into to control signal be delivered to contactor;
Described contactor, for the control signal of reception control circuit output, and, according to control signal, adjust the unloading condition of unloader;
Described unloader, regulate the unloading condition of wind-driven generator by contactor.
Further, described unloader comprises PWM unloader and three-phase unloader, and described three-phase unloader is connected with described contactor, and described PWM unloader is connected with described control circuit.
Further, be provided with a gate-controlled switch between described control circuit and described PWM unloader.
Further, described gate-controlled switch is mosfet transistor, and the gate pole of described mosfet transistor is couple to described control circuit, drain electrode is couple to described PWM unloader, source electrode is couple to earth potential.
Further, described contactor also is connected with control circuit.
Further, also be connected with a manual overvide on described contactor.
The present invention also provides a kind of control method of wind power generator incorporated in power network controller, comprises the following steps:
When the power supply of net electricity, sample circuit gathers voltage signal, and the voltage signal and the reference voltage that collect are compared;
Voltage signal by after relatively, be sent to control circuit, and control circuit is according to the signal of contrast, the unloading condition of regulation and control PWM unloader;
When the net electricity is stopped power supply, sample circuit and control circuit outage, contactor work, control the three-phase unloader and carry out the three-phase off-load, controls wind-driven generator and enter braking state.
Further, between described control circuit and described PWM unloader, be equipped with gate-controlled switch, by the length of gate-controlled switch ON time, control the length of the unloading time of PWM unloader.
Preferably, between described control circuit and described PWM unloader, be equipped with mosfet transistor, by the length of mosfet transistor ON time, control the length of the unloading time of PWM unloader.
The invention has the beneficial effects as follows: the output voltage that controller body of the present invention can the constant wind power generator, guarantee that in grid-connected wind generator system, other all parts move under best operating voltage; In when electricity net not, the controller body can automatic disconnection, and controls the off-load of wind-driven generator three-phase, and wind-driven generator is in braking state.Thereby guarantee under powering-off state, the safety of whole system, run into strong wind in the time of can not cutting off the power supply, cause the accident of wind-driven generator idle running driving; The electric supply installation of controller body is electrically connected to net, and, by the power supply of net electricity, has saved storage battery, has saved system cost, has improved system operation reliability.
The accompanying drawing explanation
The principle framework figure that Fig. 1 is wind power generator incorporated in power network controller of the present invention;
The circuit theory frame diagram that Fig. 2 is an embodiment of wind power generator incorporated in power network controller of the present invention.
Wherein, 1, controller body; 101, Acquisition Circuit; 102, control circuit; 103, contactor; 104, manual overvide; 105, gate-controlled switch; 2, unloader; 201, three-phase unloader; 202, PWM unloader; 3, rectification circuit; 4, combining inverter; 5, net electricity; 6, electric supply installation; 7, wind-driven generator.
Embodiment
Below in conjunction with accompanying drawing, principle of the present invention and feature are described, example, only for explaining the present invention, is not intended to limit scope of the present invention.
A kind of wind power generator incorporated in power network controller, comprise controller body 1 and unloader 2, and described controller body 1 comprises sample circuit 101, control circuit 102 and contactor 103, wherein:
Described sample circuit 101, for gathering the signal of telecommunication of wind-driven generator 7 outputs, and be sent to control circuit 102;
Described control circuit 102, the signal of telecommunication collected for reception, and the signal of telecommunication collected is changed into to control signal be delivered to gate-controlled switch 105 and contactor 103;
Described unloader 2 comprises three-phase unloader 201 and PWM unloader 202, and described three-phase unloader 201 is connected with described contactor 103, and described PWM unloader 202 is connected with described control circuit 102.
Controller body 1 inside is provided with the comparison circuit (not shown), comparison circuit is compared sampled signal with reference voltage, contactor 103 is according to control signal, automatically control access or the disconnection of unloader 2: when sampled signal is less than reference voltage, need to reduce braking action, reduce the pulse duration of control signal, reduce to access the off-load power of PWM unloader 202; When sampled signal is greater than reference voltage, need to increase braking action, increase the pulse duration of control signal, increase the off-load power of access PWM unloader 202; When sampled signal surpasses the maximum off-load power of PWM unloader 202, three-phase unloader 201 is started working, and enters the three-phase unloading condition;
Described contactor 103 is for the control signal of reception control circuit 102 outputs, be provided with a manual overvide 104 on contactor 103, when wind-driven generator 7, controller body 1 need to safeguard or predict bad weathers such as will there will be typhoon, can make contactor 103 adhesives by manual overvide 104, wind-driven generator 7 is connected three-phase unloader 201, thereby makes wind-driven generator 7 in on-position;
Described gate-controlled switch 105 can be mosfet transistor, and grid is couple to control circuit 102 output signal ends, and for the control signal of reception control circuit 102 outputs, drain electrode is couple to an end of PWM unloader 202, and source electrode is couple to earth potential.
Described PWM unloader 202, one ends couple the mosfet transistor drain electrode, and another end is couple to the output after rectification circuit 3 rectifications;
Described three-phase unloader 201, connect wind-driven generator 7 by contactor 103;
The present invention also provides a kind of control method of wind power generator incorporated in power network controller, comprises the following steps:
When 5 power supply of net electricity, sample circuit 101 gathers voltage signal, and the voltage signal and the reference voltage that collect are compared;
Voltage signal by after relatively, be sent to control circuit 102, and control circuit 102 is according to the signal of contrast, the unloading condition of regulation and control PWM unloader 202;
When net electricity 5 is stopped power supply, sample circuit 101 and control circuit 102 outages, contactor 103 work, control three-phase unloader 201 and carry out the three-phase off-load, controls wind-driven generator 7 and enter braking state.
Be equipped with gate-controlled switch 105 between described control circuit 102 and described PWM unloader 202, by the length of gate-controlled switch 105 ON time, control the length of the unloading time of PMW unloader 202.
Be equipped with a mosfet transistor between described control circuit 102 and described PWM unloader 202, by the length of mosfet transistor ON time, control the length of the unloading time of PWM unloader 202.
The present invention wherein execution mode of an example is as follows:
Wind-driven generator 7 generatings, after rectification circuit 3, be delivered to combining inverter 4 by the electric current part after rectification, and another part flows to controller body 1, supplies with controller sample circuit 101.Controller body 1 is burning voltage by the unstable voltage transition received, and is delivered in combining inverter 4, and net electricity 5, by electric supply installation 6, provides working power to controller body 1, now, and 1 normal operation of controller body.
Described electric supply installation 6 comprises transformer, rectifier bridge and voltage stabilizing circuit.
When running into strong wind, when wind-driven generator 7 voltages approach combining inverter 4 maximum input voltage, the sample circuit 101 of controller body 1 is compared the signal collected with reference voltage, when sampled signal is greater than reference voltage, need to increase off-load, wind-driven generator 7 reduces by the voltage of controller body 1 output; When sampled signal is less than reference voltage, need to reduce off-load, wind-driven generator 7 increases by controller body 1 output voltage.Access the size of the off-load power of PWM unloader 202 by change, realize the meticulous control to wind-driven generator 7 output voltages, guarantee that combining inverter 4 moves under optimum voltage, reaches maximal efficiency.
When surpassing PWM unloader 202 voltage stabilizing power bracket, control circuit 102 sends control signal to control contactor 103, makes 201 work of three-phase unloader, wind-driven generator 7 three-phase off-loads, and wind-driven generator 7 is in braking state.
When 5 outage of net electricity, contactor 103 closures, and make 201 work of three-phase unloader by control contactor 103, and wind-driven generator 7 three-phase off-loads, wind-driven generator 7 is in braking state.
Gate-controlled switch 105 in the present embodiment is that mosfet transistor is only that schematically those skilled in the art can select any suitable gate-controlled switch 105 to be controlled PWM unloader 202, carry out voltage stabilizing output.
The foregoing is only preferred embodiment of the present invention, in order to limit the present invention, within the spirit and principles in the present invention not all, any modification of doing, be equal to replacement, improvement etc., within all should being included in protection scope of the present invention.

Claims (8)

1. a wind power generator incorporated in power network controller, comprise controller body and unloader, it is characterized in that: described controller body comprises sample circuit, control circuit and contactor, wherein:
Described sample circuit, for gathering the signal of telecommunication of wind-driven generator output, and be sent to control circuit;
Described control circuit, the signal of telecommunication collected for reception, and the signal of telecommunication collected is changed into to control signal be delivered to contactor;
Described contactor, for the control signal of reception control circuit output, and, according to control signal, control the unloading condition of three-phase unloader;
Described unloader, control the three-phase unloading condition of wind-driven generator by contactor.
2. wind power generator incorporated in power network controller according to claim 1, it is characterized in that: described unloader comprises PWM unloader and three-phase unloader, and described three-phase unloader is connected with described contactor, and described PWM unloader is connected with described control circuit.
3. wind power generator incorporated in power network controller according to claim 2, is characterized in that: between described control circuit and described PWM unloader, be provided with gate-controlled switch.
4. wind power generator incorporated in power network controller according to claim 3, it is characterized in that: described gate-controlled switch is mosfet transistor, the gate pole of described mosfet transistor is couple to described control circuit, and drain electrode is couple to described PWM unloader, and source electrode is couple to earth potential.
5. wind power generator incorporated in power network controller according to claim 1, is characterized in that: also be connected with a manual overvide on described contactor.
6. the control method of a wind power generator incorporated in power network controller, is characterized in that, comprises the following steps:
When the power supply of net electricity, sample circuit gathers voltage signal, and the voltage signal and the reference voltage that collect are compared;
Voltage signal by after relatively, be sent to control circuit, and control circuit is according to the signal of contrast, the unloading condition of regulation and control PWM unloader;
When the net electricity is stopped power supply, sample circuit and control circuit outage, contactor work, control the three-phase unloader and carry out the three-phase off-load, controls wind-driven generator and enter braking state.
7. the control method of a kind of wind power generator incorporated in power network controller according to claim 6, be equipped with gate-controlled switch between described control circuit and described PWM unloader, by the length of gate-controlled switch ON time, control the length of the unloading time of PWM unloader.
8. the control method of a kind of wind power generator incorporated in power network controller according to claim 6, be equipped with mosfet transistor between described control circuit and described PWM unloader, by the length of mosfet transistor ON time, control the length of the unloading time of PWM unloader.
CN2013104261097A 2013-09-17 2013-09-17 Grid connected wind driven generator controller and control method thereof Pending CN103457294A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN2013104261097A CN103457294A (en) 2013-09-17 2013-09-17 Grid connected wind driven generator controller and control method thereof

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Application Number Priority Date Filing Date Title
CN2013104261097A CN103457294A (en) 2013-09-17 2013-09-17 Grid connected wind driven generator controller and control method thereof

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CN103457294A true CN103457294A (en) 2013-12-18

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Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2004320972A (en) * 2003-03-28 2004-11-11 Matsushita Electric Ind Co Ltd Permanent magnet rotating electric machine and its controlling method, vehicle, wind power generator system, and engine generator
CN201674236U (en) * 2010-05-10 2010-12-15 青岛敏深风电科技有限公司 Wind generator output voltage-stabilization control system
CN202150707U (en) * 2011-07-18 2012-02-22 青岛敏深风电科技有限公司 Efficient intelligent aerogenerator grid connected system
CN202817833U (en) * 2012-09-17 2013-03-20 柯雄英 Wind and solar hybrid power generation control device applied to new energy industry

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2004320972A (en) * 2003-03-28 2004-11-11 Matsushita Electric Ind Co Ltd Permanent magnet rotating electric machine and its controlling method, vehicle, wind power generator system, and engine generator
CN201674236U (en) * 2010-05-10 2010-12-15 青岛敏深风电科技有限公司 Wind generator output voltage-stabilization control system
CN202150707U (en) * 2011-07-18 2012-02-22 青岛敏深风电科技有限公司 Efficient intelligent aerogenerator grid connected system
CN202817833U (en) * 2012-09-17 2013-03-20 柯雄英 Wind and solar hybrid power generation control device applied to new energy industry

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
彭理渊等: "中小型风力发电提水智能控制系统的设计", 《山西能源与节能》, no. 6, 31 December 2010 (2010-12-31) *

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Application publication date: 20131218