CN102278277B - Safe logic control device for wind-powered hub - Google Patents
Safe logic control device for wind-powered hub Download PDFInfo
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- CN102278277B CN102278277B CN2011101718129A CN201110171812A CN102278277B CN 102278277 B CN102278277 B CN 102278277B CN 2011101718129 A CN2011101718129 A CN 2011101718129A CN 201110171812 A CN201110171812 A CN 201110171812A CN 102278277 B CN102278277 B CN 102278277B
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- Y—GENERAL 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
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/70—Wind energy
- Y02E10/72—Wind turbines with rotation axis in wind direction
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Abstract
The invention discloses an integrated and miniaturization safe logic control device for controlling a wind power generation direct-current variable pitch motor, in particular to the safe logic control device for the wind-powered hub. The safe logic control device comprises a normal work condition direct-current variable pitch motor safe logic control circuit, an emergency work condition direct-current variable pitch motor safe logic control circuit and a PLC (Programmable Logic Controller) output watchdog pulse monitoring circuit. The invention has main benefits that: by carrying out integrated and miniaturization safe logic, mounting spaced and the cost of products are saved; a status indicator lamp is arranged on the logic box and enables the system state to be more visualized and convenient to debug and check; and an intermediate relay easily generating faults is simplified and the reliability of the system is improved on the basis of not reducing the logic safety of the system.
Description
Technical field
The present invention relates to a kind of wind power plant, relate in particular to a kind of wind-power electricity generation direct current and become oar motor safety logic control device.
Technical background
Along with non-renewable energy resources face exhausted awkward situation at world wide, for satisfying suitability for industrialized production and the human lives is required, people are to the concern of sun power, wind-force, these regenerative resources of waterpower and utilize day by day and promote.Wherein, wind-power electricity generation is a kind of relatively ripe energy development technology that developed.Especially in recent years, wind-power electricity generation has obtained global attention, along with the continuous maturation of Wind Power Utilization technology, the single-machine capacity of blower fan constantly increases, Megawatt fan has become the main flow blower fan, and in Megawatt fan, feather control is widely used.
In the modern wind electricity generation system, variable-pitch control system is the blower fan safe operation, stablizes the key of output power, is the core cell of wind power control system.Because wind speed is constantly to change in the Nature, in order to utilize as much as possible wind energy, and require not only steadily safety but also generate electricity efficiently of blower fan, that will have very high reliability and security by the changes persuing pitch control system.Simultaneously, consider narrow space in the axial fan hub, control system should be convenient for installation and maintenance, and existing wheel hub control system relay logic is numerous and diverse, and relay is the device that easily breaks down.Therefore, for further improving system security reliability, solve simultaneously installing space little, the problem such as components and parts are crowded, the present invention is with the logical circuit integrated micro.
Summary of the invention
The object of the invention is to solve the above-mentioned technical matters that prior art exists, provide a kind of with low cost, installing space economic and convenient in check and debugging, guarantee simultaneously to improve on the basis of not lowering security logic the safety logic control system of the reliability of system.
The objective of the invention is to realize by following approach:
A kind of safe logic control device for wind-powered hub, it is comprised of control enclosure and external urgent excitation armature circuit, and the control enclosure internal circuit board is connected and composed by nominal situation security logic control circuit, emergency work condition security logic control circuit and PLC output watchdog pulse supervisory circuit.
Further, described control enclosure is provided with status indicator lamp and several interfaces.
Further, described nominal situation logic control circuit is connected and composed by main control loop, normal armature control loop and normal braking control loop;
Described main control loop is connected to form by urgent armature contactor 18K4 normally closed contact, midget relay K4;
Described normal armature control loop by external threephase switch power supply+24V end articulates tentaculum 20K1 normally closed contact with master relay K4 normally opened contact, brake relay K2 normally opened contact, external field current relay KI1 normally opened contact and external normal electrical and is connected to form;
Described normal braking control loop is comprised of brake input circuit and output loop: input circuit is connected to form by urgent armature contactor 18K4 normally closed contact and brake pilot relay K2; Output loop by the threephase switch power supply+24V end is formed by connecting with parallel circuit by brake transfer relay K1 normally closed contact and K2 normally opened contact.
Further, described emergency work condition logic control circuit is connected and composed by external urgent excitation armature circuit and emergency brake control loop, time-delay control loop;
Described external urgent excitation armature circuit by external single-phase switch power supply+24V end, operating mode transfer relay K9 normally closed contact, 90 °, 95 ° limit switches, normal electrical articulate tentaculum 20K1 normally closed contact and urgent excitation contactor 18K5 are connected to form, urgent armature contactor 18K4 is connected with the 18K5 normally opened contact and is in parallel with urgent excitation contactor 18K5;
Described emergency brake control loop is comprised of brake input circuit, output loop and timing circuit: input circuit is comprised of external urgent excitation armature circuit and emergency brake relay K 5; Output loop by the single-phase switch power supply+24V end is formed by connecting with the K5 normally opened contact; Described time-delay control loop is formed by connecting by delay circuit and armature current limliting contactor 18K1.
Further, described watchdog pulse supervisory circuit is comprised of pulse input circuit, phase inverter, monostalbe trigger, MOS switching tube, midget relay KW and three-terminal voltage-stabilizing power supply; The three-terminal voltage-stabilizing power input connects threephase switch power supply+24V, and output terminal connects the power input of phase inverter and monostalbe trigger chip; Pulse input circuit connects the phase inverter input end, and output terminal connects the monostalbe trigger input end, monostalbe trigger output terminal driven MOS FET switching tube, and the switching tube drain electrode connects midget relay KW coil, and source electrode connects ground.
Further, this safe logic control device for wind-powered hub is powered simultaneously by the two-way power supply: a routing network electricity is through the threephase switch Power supply, and three battery pack of another route are through the single-phase switch Power supply.
Further, described delay circuit is connected and composed by simple gate voltage limit comparer and two MOSFET driving circuits of two different thresholdings, two simple gate voltage limit comparers have identical positive input terminal, output terminal drives respectively two switch mosfet pipes, and drain electrode and the source electrode of two switching tubes are connected in parallel respectively.
Further, described simple gate voltage limit comparer is 5.1K by RC delay circuit, two operational amplifiers, two resistances adjustable resistance connects and composes; The adjustable resistance that the positive input terminal of RC delay circuit concatenation operation amplifier, two resistances are 5.1K is the negative input end of concatenation operation amplifier respectively.
Further, described pulse input circuit is comprised of RC parallel circuit and the stabilivolt that is added in its two ends.
The present invention has avoided auxiliary reclay too much and easily to break down, and logic relay too much causes installing space crowded, and logic control circuit disperses and is unfavorable for the problems such as check and debugging having strengthened the security of system reliability.Take simultaneously modular design, make whole logical circuit compact succinct, it is convenient to change.
Description of drawings
Below in conjunction with accompanying drawing the present invention is described in further detail:
Fig. 1 is surface structure schematic diagram of the present invention;
Fig. 2 circuit board pie graph of the present invention;
The connection layout of Fig. 3 the present invention in wind power hub;
Fig. 4 board circuit figure of the present invention;
Among the figure, control enclosure 1, status indicator lamp 2, circuit board 3, interface 4, external urgent logic control circuit 5, logic control device 51, PLC controller 52, threephase switch power supply 53, single-phase switch power supply 54, battery pack 55, hypervelocity sensor 56, overspeed monitor 57, security logic relay 58, armature current limliting contactor 59, normal electrical articulates tentaculum 60, main control loop 91, watchdog pulse supervisory circuit 92, normal armature control loop 93, normal braking control loop 94, time-delay control loop 95, emergency brake control loop 96, urgent excitation armature circuit 97, nominal situation security logic control circuit 98, emergency work condition security logic control circuit 99.
Embodiment
A kind of safe logic control device for wind-powered hub of the present invention, it is comprised of control enclosure 1 and external urgent excitation armature circuit 5, described control enclosure 1 is provided with status indicator lamp 2 and several interfaces 4, and control enclosure 1 internal circuit board 3 is connected and composed by nominal situation security logic control circuit, emergency work condition security logic control circuit and PLC output watchdog pulse supervisory circuit 92.This safe logic control device for wind-powered hub is powered simultaneously by the two-way power supply: a routing network electricity is through 53 power supplies of threephase switch power supply, three battery pack 55 of another route are through single-phase switch power supply 54 power supply, and three battery racks are that the accumulator of 12V forms by 24 joint rated voltages respectively.
Interface 4 comprises the J1-J4 interface, as shown in Figure 4.
The J1 Interface Terminal comprises that the J1:1 that connects armature reserve power supply 18K4 normally closed auxiliary contact is connected connection safety relay J1:3 with J1:2, the J1:4 that connects PLC bypass bypass input signal is connected with output signal J1:5 and is connected reserve 24V power supply input J1:6;
The J2 Interface Terminal comprises the J2:1 that connects ground, connect the reserve of armature power supply for the J2:2 of electric contactor 18K4 coil, the J2:3 that connects armature normal power supply 20K1 coil be connected with J2:4 connection 24V normal power supply J2:5, connect the J2:6 of limit switch;
The J3 Interface Terminal comprise the J3:1 that connects ground be connected with J3:4 the connection overspeed monitor J3:2, connect the J3:3 of PLC theft-resistant link chain ready signal output port, the J3:6 that connects the J3:5 of normal 24V power supply and connect PLC rotating speed normal signal input port;
The J4 Interface Terminal comprise the J4:1, the J4:2 that connects ground that connect to connect brake output and become oar motor brake relay coil, the J4:3 that connects armature current limliting time-delay bypass contactor 18K1 be connected with J4:6 connection PLC brake drive signal output port J4:4, connect the J4:5 of the WDOG watchdog pulse signal output port of PLC;
Described nominal situation logic control circuit is connected and composed by main control loop 91, normal armature control loop 93 and normal braking control loop 94; Described main control loop 91 is connected to form by urgent armature contactor 18K4 normally closed contact, midget relay K4; Described normal armature control loop 93 by external threephase switch power supply 53+24V end articulates tentaculum 6020K1 normally closed contact with master relay K4 normally opened contact, brake relay K2 normally opened contact, external field current relay KI1 normally opened contact and external normal electrical and is connected to form; Described normal braking control loop 94 is comprised of brake input circuit and output loop: input circuit is connected to form by urgent armature contactor 18K4 normally closed contact and brake pilot relay K2; Output loop by threephase switch power supply 53+24V end is formed by connecting with parallel circuit by brake transfer relay K1 normally closed contact and K2 normally opened contact.
Described emergency work condition logic control circuit is connected and composed by external urgent excitation armature circuit 97 and emergency brake control loop 96, time-delay control loop 95; Described external urgent excitation armature circuit 97 by external single-phase switch power supply 54+24V end, operating mode transfer relay K9 normally closed contact, 90 °, 95 ° limit switches, normal electrical articulate tentaculum 6020K1 normally closed contact and urgent excitation contactor 18K5 are connected to form, urgent armature contactor 18K4 is connected with the 18K5 normally opened contact and is in parallel with urgent excitation contactor 18K5; Described emergency brake control loop 96 is comprised of brake input circuit, output loop and timing circuit: input circuit is comprised of with emergency brake relay K 5 external urgent excitation armature circuit 97; Output loop by single-phase switch power supply 54+24V end is formed by connecting with the K5 normally opened contact; Described time-delay control loop 95 is formed by connecting by delay circuit and armature current limliting contactor 5918K1.Described delay circuit is connected and composed by simple gate voltage limit comparer and two MOSFET driving circuits of two different thresholdings, two simple gate voltage limit comparers have identical positive input terminal, output terminal drives respectively two switch mosfet pipes, and drain electrode and the source electrode of two switching tubes are connected in parallel respectively.The adjustable resistance that described simple gate voltage limit comparer is 5.1K by RC delay circuit, two operational amplifiers, two resistances connects and composes; The adjustable resistance that the positive input terminal of RC delay circuit concatenation operation amplifier, two resistances are 5.1K is the negative input end of concatenation operation amplifier respectively.
Described watchdog pulse supervisory circuit 92 is comprised of pulse input circuit, phase inverter, monostalbe trigger, MOS switching tube, midget relay KW and three-terminal voltage-stabilizing power supply; The three-terminal voltage-stabilizing power input connects threephase switch power supply+24V, and output terminal connects the power input of phase inverter and monostalbe trigger chip; Pulse input circuit connects the phase inverter input end, and output terminal connects the monostalbe trigger input end, monostalbe trigger output terminal driven MOS FET switching tube, and the switching tube drain electrode connects midget relay KW coil, and source electrode connects ground.Described pulse input circuit is comprised of RC parallel circuit and the stabilivolt that is added in its two ends.
A kind of safe logic control device for wind-powered hub comprises that nominal situation security logic control circuit, emergency work condition security logic control circuit and PLC output watchdog pulse supervisory circuit connect and compose.When being applied in the control of wind power hub, take the array mode of three logic control boxes, any two can be exchanged on function.Fig. 4 is that this direct current becomes a kind of connected mode of oar motor safety logic control device in variable-pitch control system.Three security logic control enclosurees can exchange, and have good replaceability and maintainability.The wind power hub safety logic control system is become by three change oar groups, and each becomes a cover logic control device for safety 51 in the oar cabinet.
Under the nominal situation, limit switch is normal.When hub rotation speed was normal, rotation speed monitoring device 57 was normal, when watchdog pulse is normal, and 92 normal operations of watchdog pulse supervisory circuit, the KW adhesive, theft-resistant link chain is communicated with.Direct current becomes the oar motor and is in normal change oar state, the motor excitation that powers on, field current relay KI1 adhesive.PLC52 provides the theft-resistant link chain ready signal, and security logic relay 58 is given to three logic control device for safeties 51 simultaneously with the theft-resistant link chain ready signal, and master relay K4 gets electric, and main control loop 91 is connected, and normal electrical armature relay 2,0K1 60 gets electric adhesive.Simultaneously, PLC provides the brake release signal, and brake pilot relay K2 gets electric, and normal braking control loop 94 is connected, and three direct currents become the oar motor and begin starting, implement to become oar.
Under the emergency work condition, 90 ° of limit switches do not move, when hub rotation speed or watchdog pulse unusual, theft-resistant link chain disconnects, maybe when net electricity power unsuccessfully, variable blade control system fault, the disconnection of nominal situation security logic control circuit, emergency work condition security logic control circuit is connected, urgent excitation contactor 18K5 energising becomes the oar motor and continues excitation, and normally opened contact is closed, urgent armature contactor 18K4 gets electric, and conducting is continued in the armature loop.Simultaneously emergency brake pilot relay K5 gets electric, and emergency brake control loop 96 is connected, and brake continues to discharge.95 energisings of time-delay control loop, the 18K1 time-delay of armature current limliting contactor 59 is connected.Motor comes into effect urgent change oar, when the blade angle arrives 90 °, touches 90 ° of limit switches, and the limit switch normally closed contact disconnects, and urgent logic control circuit 5 disconnects, and brake resets, and motor stalling is finished emergency feathering.
When 90 ° of limit switches triggerings, midget relay K7 gets electric, and normally opened contact is closed, and bypass is connected, and blade is in feather position.Return the oar signal when PLC provides, the nominal situation logic control circuit is communicated with, and motor reversal comes into effect and returns oar, and the blade angle is gone to position less than 90 °.
Delay circuit adopts Redundancy Design, is comprised of simple gate voltage limit comparer and two switch mosfet tube drive circuits of two different thresholdings.The adjustable resistance that described simple gate voltage limit comparer is 5.1K by RC delay circuit, two operational amplifiers, two resistances forms.The RC delay circuit connects the anode input of operational amplifier, the negative terminal of the adjustable resistance concatenation operation amplifier that two resistances are 5.1K.Under the emergency work condition, the RC delay circuit powers on, and by regulating two adjustable resistances, pre-determines the negative terminal voltage of two operational amplifiers, make two simple gate voltage limit comparers delay time respectively 2.1s, 3s output.Under emergency, direct current becomes the oar motor power to be provided by the accumulators of 24 joint series connection, and delay circuit is used for reliable excision and is connected on direct current and becomes oar armature loop and be used for the starting resistance of current limliting.
PLC output watchdog pulse supervisory circuit 92 is ingredients of variable blade control system theft-resistant link chain, watchdog pulse supervisory circuit 92, hypervelocity sensor 56, overspeed monitor 57 and security logic relay 58 form the security of system link, when normal the and watchdog pulse signal of and if only if hub rotation speed was normal, theft-resistant link chain could ready connection.But watchdog pulse supervisory circuit 92 is comprised of the monostalbe trigger of three-terminal voltage-stabilizing power supply, phase inverter, two repeated trigger, two metal-oxide-semiconductors, pulse input circuit and midget relay KW.Pulse input circuit is reached by the RC parallel circuit and forms at the stabilivolt that is added in its two ends, is used for making input pulse satisfy the waveform requirement, and by phase inverter, the driven MOS pipe is controlled its break-make.When watchdog pulse was normal, monostalbe trigger was subject to repeating constantly to trigger, and kept the output high level signal, and midget relay KW gets electric.Otherwise KW is with dead electricity.
Claims (6)
1. safe logic control device for wind-powered hub, it is characterized in that: it is comprised of control enclosure (1) and external urgent excitation armature circuit (5), and control enclosure (1) internal circuit board (3) is connected and composed by nominal situation security logic control circuit (98), emergency work condition security logic control circuit (99) and PLC output watchdog pulse supervisory circuit (92);
Described nominal situation logic control circuit (98) is connected and composed by main control loop (91), normal armature control loop (93) and normal braking control loop (94);
Described main control loop (91) is connected to form by urgent armature contactor 18K4 normally closed contact, midget relay K4;
Described normal armature control loop (93) by external threephase switch power supply (53)+24V end articulates tentaculum (60) 20K1 normally closed contact with master relay K4 normally opened contact, brake relay K2 normally opened contact, external field current relay KI1 normally opened contact and external normal electrical and is connected to form;
Described normal braking control loop (94) is comprised of brake input circuit and output loop: input circuit is connected to form by urgent armature contactor 18K4 normally closed contact and brake pilot relay K2; Output loop by threephase switch power supply (53)+24V end is formed by connecting with parallel circuit by brake transfer relay K1 normally closed contact and K2 normally opened contact.
Described emergency work condition logic control circuit (99) is connected and composed by external urgent excitation armature circuit (97) and emergency brake control loop (96), time-delay control loop (95);
Described external urgent excitation armature circuit (97) by external single-phase switch power supply (54)+24V end, operating mode transfer relay K9 normally closed contact, 90 °, 95 ° limit switches, normal electrical articulate tentaculum (60) 20K1 normally closed contact and urgent excitation contactor 18K5 are connected to form, urgent armature contactor 18K4 is connected with the 18K5 normally opened contact and is in parallel with urgent excitation contactor 18K5;
Described emergency brake control loop (96) is comprised of brake input circuit, output loop and timing circuit: input circuit is comprised of external urgent excitation armature circuit (97) and emergency brake relay K 5; Output loop by single-phase switch power supply (54)+24V end is formed by connecting with the K5 normally opened contact; Described time-delay control loop (95) is formed by connecting by delay circuit and armature current limliting contactor (59) 18K1;
Described watchdog pulse supervisory circuit (92) is comprised of pulse input circuit, phase inverter, monostalbe trigger, MOS switching tube, midget relay KW and three-terminal voltage-stabilizing power supply; The three-terminal voltage-stabilizing power input connects threephase switch power supply+24V, and output terminal connects the power input of phase inverter and monostalbe trigger chip; Pulse input circuit connects the phase inverter input end, and output terminal connects the monostalbe trigger input end, monostalbe trigger output terminal driven MOS FET switching tube, and the switching tube drain electrode connects midget relay KW coil, and source electrode connects ground.
2. a kind of safe logic control device for wind-powered hub as claimed in claim 1, it is characterized in that: described control enclosure (1) is provided with status indicator lamp (2) and several interfaces (4).
3. a kind of safe logic control device for wind-powered hub as claimed in claim 1, it is characterized in that: this safe logic control device for wind-powered hub is powered simultaneously by the two-way power supply: a routing network electricity is through threephase switch power supply (53) power supply, and three battery pack of another route (55) are powered through single-phase switch power supply (54).
4. a kind of safe logic control device for wind-powered hub as claimed in claim 1, it is characterized in that: described delay circuit is connected and composed by simple gate voltage limit comparer and two MOSFET driving circuits of two different thresholdings, two simple gate voltage limit comparers have identical positive input terminal, output terminal drives respectively two switch mosfet pipes, and drain electrode and the source electrode of two switching tubes are connected in parallel respectively.
5. a kind of safe logic control device for wind-powered hub as claimed in claim 4 is characterized in that: the adjustable resistance that described simple gate voltage limit comparer is 5.1K by RC delay circuit, two operational amplifiers, two resistances connects and composes; The adjustable resistance that the positive input terminal of RC delay circuit concatenation operation amplifier, two resistances are 5.1K is the negative input end of concatenation operation amplifier respectively.
6. a kind of safe logic control device for wind-powered hub as claimed in claim 1 is characterized in that: described pulse input circuit is comprised of RC parallel circuit and the stabilivolt that is added in its two ends.
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| CN2011101718129A CN102278277B (en) | 2011-06-24 | 2011-06-24 | Safe logic control device for wind-powered hub |
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| CN2011101718129A CN102278277B (en) | 2011-06-24 | 2011-06-24 | Safe logic control device for wind-powered hub |
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| CN102278277B true CN102278277B (en) | 2013-04-17 |
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| CN104656512A (en) * | 2015-01-14 | 2015-05-27 | 风脉（武汉）可再生能源技术有限责任公司 | Fan hub environmental control system and control method thereof |
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| FR2717016B1 (en) * | 1994-03-02 | 1996-05-15 | Somfy | Electric motor drive device comprising means for measuring the displacement of the driven body. |
| CN101311527B (en) * | 2007-05-23 | 2012-10-03 | 连云港杰瑞电子有限公司 | Pitch control system of wind mill generator |
| CN201402394Y (en) * | 2009-04-02 | 2010-02-10 | 保定天威集团有限公司 | Fan variable-pitch controller |
| CN202177802U (en) * | 2011-06-24 | 2012-03-28 | 湘潭世通电气有限公司 | Safety logic control device of wind-power hub |
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