CN107171599B - Skilled hand's behaviour's type emergency bearing oil pump control device and method - Google Patents
Skilled hand's behaviour's type emergency bearing oil pump control device and method Download PDFInfo
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- CN107171599B CN107171599B CN201710401443.5A CN201710401443A CN107171599B CN 107171599 B CN107171599 B CN 107171599B CN 201710401443 A CN201710401443 A CN 201710401443A CN 107171599 B CN107171599 B CN 107171599B
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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
- H02P1/00—Arrangements for starting electric motors or dynamo-electric converters
- H02P1/16—Arrangements for starting electric motors or dynamo-electric converters for starting dynamo-electric motors or dynamo-electric converters
- H02P1/18—Arrangements for starting electric motors or dynamo-electric converters for starting dynamo-electric motors or dynamo-electric converters for starting an individual dc motor
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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
- H02P7/00—Arrangements for regulating or controlling the speed or torque of electric DC motors
- H02P7/06—Arrangements for regulating or controlling the speed or torque of electric DC motors for regulating or controlling an individual dc dynamo-electric motor by varying field or armature current
- H02P7/18—Arrangements for regulating or controlling the speed or torque of electric DC motors for regulating or controlling an individual dc dynamo-electric motor by varying field or armature current by master control with auxiliary power
- H02P7/24—Arrangements for regulating or controlling the speed or torque of electric DC motors for regulating or controlling an individual dc dynamo-electric motor by varying field or armature current by master control with auxiliary power using discharge tubes or semiconductor devices
- H02P7/28—Arrangements for regulating or controlling the speed or torque of electric DC motors for regulating or controlling an individual dc dynamo-electric motor by varying field or armature current by master control with auxiliary power using discharge tubes or semiconductor devices using semiconductor devices
- H02P7/285—Arrangements for regulating or controlling the speed or torque of electric DC motors for regulating or controlling an individual dc dynamo-electric motor by varying field or armature current by master control with auxiliary power using discharge tubes or semiconductor devices using semiconductor devices controlling armature supply only
- H02P7/29—Arrangements for regulating or controlling the speed or torque of electric DC motors for regulating or controlling an individual dc dynamo-electric motor by varying field or armature current by master control with auxiliary power using discharge tubes or semiconductor devices using semiconductor devices controlling armature supply only using pulse modulation
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Abstract
A kind of skilled hand behaviour type emergency bearing oil pump control device and method, it is related to the control field of emergency bearing oil pump in heat power generating system, including hard manual control device and the intelligent controlling device being connected in parallel on oil pump direct current generator, and hard manual control device and the common by-pass unit of intelligent controlling device；The hard manual control device receives the emergency instruction of thermal operating platform, for carrying out decompression current limliting emergency start control to direct current generator under emergency conditions；The intelligent controlling device receives the control instruction of electric control system, for carrying out starting control to direct current generator under normal circumstances；When executing DC MOTOR CONTROL, the intelligent controlling device of the hard manual control device locking low rights of high permission；When the starting current of direct current generator or revolving speed reach the setting percentage of rated value, the armature coil positive terminal X3 of hard manual control device or intelligent controlling device control by-pass unit connection electrical source of power electrode input end X1 and direct current generator.
Description
Technical field
The present invention relates to the controls of emergency bearing oil pump in heat power generating system, specially skilled hand behaviour type emergency bearing oil pump control device
And method.
Background technique
With the continuous improvement of domestic heat power generating system service requirement and the continuous development of power electronic technique, to heating power
Reliability, design technology, the technological innovation etc. of the direct current lubrication control of electricity generation system require it is higher and higher, currently, domestic heating power
The direct current oil pump control majority applied in electricity generation system is all made of the control design case of traditional type, utilizes D.C. contactor convert resistance
Mode seals in high-power resistance in the armature circuit of direct current generator, when the motor is energized, limit electricity by resistance decompression
The starting current of motivation, is allowed to electric current or when revolving speed reaches the certain percentage of rated value, will be by resistance by D.C. contactor
Road.It will cause the voltage decline abruptly of direct current system in this way to start dc motor usually, influence relay protection
Phenomena such as working normally, D.C. contactor contact adhesion and carbonization frequent occurrence, shortening dc motor service life, is difficult to reach
To the requirement of heat power generating system operation process.And the utilization rate of electrical of traditional Starting mode is low, and electric energy loss is big and heat
It generates more；DC grid system is impacted or is polluted when long-term starting, commutate contracting under commutator for electric motor current state
Short service life, the other on-line equipments malfunction for causing common network to work.
Summary of the invention
Aiming at the problems existing in the prior art, the present invention provides a kind of skilled hand behaviour type emergency bearing oil pump control device and side
Method can be realized the smooth starting of dc motor, and starting current is not mutated, and not influence other direct current system work, meanwhile,
Skilled hand's operation truly can be achieved, so that emergency flight control or special process control.
The present invention is to be achieved through the following technical solutions:
Skilled hand's behaviour's type emergency bearing oil pump control device, including hard manual control device and the intelligence being connected in parallel on oil pump direct current generator
It can control device, and hard manual control device and the common by-pass unit of intelligent controlling device；
The hard manual control device receives the emergency instruction of thermal operating platform, under emergency conditions to direct current
Motor carries out decompression current limliting emergency start control；
The intelligent controlling device receives the control instruction of electric control system, under normal circumstances to direct current
Motor carries out starting control；
When executing DC MOTOR CONTROL, the intelligent controlling device of the hard manual control device locking low rights of high permission；
When the starting current of direct current generator or revolving speed reach the setting percentage of rated value, hard manual control device or intelligent control dress
Set the armature coil positive terminal X3 that control by-pass unit connects electrical source of power electrode input end X1 and direct current generator.
Preferably, the intelligent controlling device includes PWM processing module, IGBT and Current Transmit；The leakage of IGBT
Pole connects electrical source of power electrode input end X1, and emitter-base bandgap grading connects the armature coil positive terminal X3 of direct current generator, and base stage connects PWM processing
The pwm pulse of module；Current Transmit is used to acquire the input current of electrical source of power；PWM processing module is used for according to electric current
The acquisition signal control IGBT output conducting of mutual inductor CT carries out DC voltage by negative voltage feedback closed loop linear regulation
High frequency chopping processing, starts direct current generator.
Preferably, intelligent controlling device further includes the first excitation contactor KMS being arranged on excitation of direct current generator access；
First excitation contactor KMS is controlled by PWM processing module.
Preferably, the hard manual control device includes hard manual control unit and definite value power resistor；Definite value function
Rate resistor is connected between electrical source of power electrode input end X1 and the armature coil positive terminal X3 of direct current generator；Hard manual control
Unit starts direct current generator for being latched intelligent controlling device, by control definite value power resistor.
Preferably, hard manual control device further includes the second excitation contactor being arranged on excitation of direct current generator access
KM3；Second excitation contactor KM3 is controlled by hard manual control unit.
Preferably, by locking contact device KM is arranged on the starting path of intelligent controlling device control on direct current generator；Direct current
By main power source switching control contactor KM1 is arranged on the starting path of hard manual control device control on motor；Locking contact device
KM and main power source switching control contactor KM1 are controlled by hard manual control device；
When working properly, locking contact device KM is normally closed, and main power source switching control contactor KM1 is normally opened；
When under emergency conditions, locking contact device KM is normally opened, and main power source switching control contactor KM1 is normally closed.
Skilled hand's behaviour's type emergency bearing oil pump control method, skilled hand's behaviour's type emergency bearing oil pump based on any one provided by the invention
Control device includes the following steps,
Step 1, when direct current generator needs to start, judge whether to start skilled hand behaviour, if so then execute step 2, otherwise judge
Whether start intelligent operation, if it is thening follow the steps 3, is waited for if not the then described skilled hand's behaviour's type emergency bearing oil pump control device
Machine repeats step 1；
Step 2, hard manual control device investment, is closed main power source switching control contactor KM1, connects main power source, pass through
Definite value power resistor is depressured current limliting, starts direct current generator, until investment by-pass unit is shorted definite value power electricity after starting successfully
Hinder device；The skilled hand for completing direct current generator grasps starting；
Step 3, intelligent controlling device is put into, and is closed locking contact device KM, is connected main power source, is passed through PWM processing module control
IGBT output conducting processed, carries out high frequency chopping processing to DC voltage, starts direct current generator, until putting into bypass after starting successfully
Unit is shorted IGBT；Complete the intelligent starting of direct current generator.
Preferably, in step 2, when hard manual control device is put into, locking contact device is opened in hard manual control device control
KM is latched intelligent controlling device.
Preferably, in step 2 and step 3, before connecting main power source, hard manual control device and intelligent controlling device lead to respectively
Closure the second excitation contactor KM3 and the first excitation contactor KMS is crossed, excitation of direct current generator voltage is connected.
Preferably, in step 1, judge whether that starting is hard by detecting whether to receive the emergency instruction from thermal operating platform
Hand behaviour；By detecting whether that receiving the control instruction from electric control system judges whether to start intelligent control operation.
Compared with prior art, the invention has the following beneficial technical effects:
The present invention collects Modern Power Electronic Devices IGBT, PWM technology, the skill in conjunction with armature initial voltage definite value limited way
Art Yu Yiti.By the way that comprehensive designs are realized in two kinds of starting control parallel connections, to direct current generator co- controlling, public by-pass unit,
So that direct current generator can be ensured sufficiently, safe and reliable operation is realized.Direct current oil pump is when system breaks down, thing
Therefore oil pump is reliably linked with electric control system (DCS system) by hard manual control device.Under normal condition, intelligent starting
Control uses the novel pulse modulation technology of PWM, controls the conducting and shutdown of power electronics master devices high power semi-conductor IGBT,
By negative voltage feedback closed loop linear regulation, high frequency chopping processing is carried out to DC voltage, thus can linear regulation DC voltage
Size, reach the size of Linear Control electric current, thus, it is possible to make there is no dash current when motor start-up, reach and smoothly open
Dynamic effect.Simultaneously because Parallel Control, a distant place or local operation can be selected arbitrarily in equipment operation, not influence present load operation
State realizes a distant place or on the spot mutually investment and mutually control.And it can directly switching skilled hand be grasped in intelligent control operational process,
Non-impact current does not influence present load operating status.
Detailed description of the invention
Fig. 1 is the theory structure block diagram of control device described in present example.
Fig. 2 is the flow diagram of control method described in present example.
Fig. 3 is the governor circuit connection figure of intelligent controlling device described in present example.
Fig. 4 is the control principle block diagram of intelligent controlling device described in present example.
Fig. 5 is that intelligent controlling device described in present example controls lower direct current generator starting current characteristic schematic diagram.
Fig. 6 is the governor circuit connection figure of hard manual control device described in present example.
Fig. 7 is the control principle block diagram of hard manual control device described in present example.
Fig. 8 is that hard manual control device described in present example controls lower direct current generator starting current characteristic schematic diagram.
Specific embodiment
Below with reference to specific embodiment, the present invention is described in further detail, it is described be explanation of the invention and
It is not to limit.
The present invention uses two-way linkage control mode, is used as normal use all the way, is controlled by intelligent controlling device, uses
PWM pulse modulation technology, to the processing of DC voltage high frequency chopping, control power electronic power device IGBT conducting and shutdown are led to
Overvoltage negative feedback closed loop linear regulation realizes the intelligent control of smooth starting emergency bearing oil pump.Another way is led to as Emergency use
Manual control device control really up to the mark, uses Electromagnetic Control to play initial voltage definite value limited way with armature, realizes decompression current limliting emergency
Starting control.When normal work, mainly based on intelligent control.
Skilled hand behaviour type emergency bearing oil pump control device of the present invention is merged by two different control structure modes, is designed as
Having intelligent control function again has hard manual control function, between the two high permission control locking low rights control, such as Fig. 1 principle frame
Figure, both have it is independent exported on the spot with remote operation instruction input and independent teletransmission contact point signal, share same
Operating status is shown on the spot.
Wherein, intelligent controlling device is the control model enabled when operating normally, and remote operation instruction is from master control electricity
Force control system (DCS system) issues, and local operation instruction is that the Intelligent operation button being arranged on control device ontology issues, and two
A operational order connects by-pass unit by artificial selection operation, intelligent controlling device automatically, controls for low rights；Hard manual control
For the control model enabled when emergency or special test, remote operation instruction is from thermal technology's master operation platform emergency order button
It issues, local operation instruction is that skilled hand's behaviour's button of control device ontology setting issues, and two operational orders are equality cross complaint, no
It is controlled by intelligent controlling device and artificial selection operation, and automatic blocking intelligent controlling device, connects by-pass unit automatically, be
High permission control.
Skilled hand behaviour type emergency bearing oil pump control device is merged by two different control structure modes, is designed as having intelligence
Can control function again has hard manual control function, between the two high permission control locking low rights control, such as Fig. 2 control flow frame
Figure starts to be judged as input enabled instruction classification, is judged as preferential always with skilled hand behaviour, has hard manual control to put at once, drop
It presses current limliting to start to work, while bypassing delay 10S and automatically engaging, the decompression current limliting 3S that prescribes a time limit is automatically performed starting；When no skilled hand grasps
Judge that intelligent control starts again, there is intelligent control to put at once, DC chopped-wave is started to work, while being bypassed with starting situation, i.e.,
Automatic time delay 3S is put into after starting successfully, and two-way control output drive motor is not necessarily to artificial handover operation.
When intelligent controlling device is put into, when being controlled, as shown in Figure 3 and Figure 4, electrical source of power input terminal is X1 (+)
With X2 (-), after receiving enabled instruction, locking contact device KM, the second excitation contactor KMS adhesive action at once, same to time lag
100mS modulate and control impulse PWM is issued afterwards, and DC power supply is sent to IGBT, by controlling the conducting size of IGBT, realizes that direct current is cut
Wave, the linear change of control DC voltage from low to high, also limits the linear change of motor starting current from low to high,
Reach motor non-impacting start effect；Intelligent control is set to adjust its control output in time and protect by current/voltage acquisition feedback
Shield, measurement, realize closed-loop control, and operating condition realizes man-machine information alert by status display.Control output is connected to direct current by X3
Motor armature coil electrode, primary given excitation voltage are exported by X5 to the magnet exciting coil anode of dc motor, motor
Two coil cathode are directly connected with power cathode.Under normal condition, when directly initiating dc motor, starting current is about big
In 10 times of rated current or more, DC motor commutator is set to generate very big heat and loss, as frequent starting can aggravate directly
Heat and the loss for flowing commutator for electric motor, reduce the service life of motor；By the operation of intelligent controlling device, reduce
The starting current of motor also just reduces heat and loss on DC motor commutator, extends the use of motor
Service life.
As shown in figure 5, when directly initiating dc motor, starting current is approximately more than characteristic when intelligent control starting current
10 times of rated current or more, DC motor commutator is set to generate very big heat and loss, as frequent starting can aggravate direct current
The heat of commutator for electric motor and loss reduce the service life of motor, be easy to cause pollution to DC grid, power supply holds
Amount, cabling etc. are intended to put many times greater, increase cost of idleness unnecessary.It is controlled using intelligent starting, can be prevented completely
The generation of the above problem, intelligent control use PWM pulse modulation technology, control power electronics master devices high power semi-conductor
The conducting and shutdown of IGBT carries out high frequency chopping processing to DC voltage by negative voltage feedback closed loop linear regulation, thus can
The size of linear regulation DC voltage, reaches the size of Linear Control electric current, thus, it is possible to make not impact when motor start-up
Electric current reaches smooth starting effect.Design reduces the starting current of motor, also just reduces on DC motor commutator
Heat and loss, extend the service life etc. of motor.
Generally speaking, intelligent controlling device controls the transmitting of PWM pulsewidth by PWM processing module and is modulated, controls electric power
The conducting and shutdown of electron master control device high power semi-conductor IGBT；By negative voltage feedback closed loop linear regulation, to direct current
Press high frequency chopping processing；It is adjusted according to proportional integration and realizes astatic velocity modulation effect, realize the reliable soft start effect of direct current generator
Fruit；Reach the intelligent control purpose of smooth starting emergency bearing oil pump.
When normal work, mainly based on intelligent control, starting current controllably at 1.5 times of rated current, started
The 10S that is delayed after journey automatically engages bypass, and intelligent control starter is transferred to online hot standby state automatically；In the present invention,
, can on the spot or a distant place starts hard manual control when occurring abnormal such as intelligent control, operation is the first permission, not by intelligent control
Locking starts immediate current controllably at 2.5-3 times of rated current.Two kinds of control operations and teletransmission status signal are independently to set
Meter all has on the spot with distant place start stop operation, realizes active and standby cooperation operation truly, it is ensured that the live safety used,
Reliability service requirement.
Wherein, the basic principle of intelligent control is that PWM is switched on and off power supply by a fixed frequency, and as needed
Change the time ratio (duty ratio) that switches on and off in a cycle to change " duty ratio " of voltage on armature of direct current motor, from
And change average voltage, control the revolving speed of motor.In pwm speed control system, when electrical power, its speed increases, and motor is disconnected
Its speed lowers when electric.As long as changing the time of switching electricity according to certain rule, i.e., controllable motor speed.And it uses
To direct current system without impact when the continuous speed regulation system start and stop of PWM technological maheup, and there is starting small power consumption, stable
The characteristics of.
Large power semiconductor device IGBT has operating switch frequency high, and saturation pressure reduces, and leakage current is small, input impedance
The features such as height, voltage drives.In speed-regulating system, using the armature power supply by control amplifier control dc motor.
The average value of armature voltage are as follows:
Uav=Ton/T.Us=ρ Us, wherein ρ=ton/ T is known as duty ratio.
By formula it is found that when changing duty ratio, so that it may obtain flat on different motor average speed Vd and armature
Equal voltage Uav, to achieve the purpose that speed regulating control.In direct current generator drive control circuit, pwm signal is by PWM processing module
In PLC control circuit provide, and through high speed optoelectronic therein be isolated PWM processing circuit, motor driven logical AND amplifying circuit
Afterwards, the switch of driving power device IGBT changes average voltage on armature of direct current motor, to control the revolving speed of motor, realizes
Direct current generator PWM speed-adjusting start.
With soft throwing control design case, realization is powered on to be put into KM without impact in circuit, and power transmission moment impact is avoided to control higher level
The work influence of switch, reliably puts into electrical source of power.After intelligent control receives enabled instruction, total pressure once gives KMS immediately,
It ensures that excitation is established, according to logic judgment and administrative analysis, generates PWM modulation signal, by PWM processing module output driving electricity
Power electronic large power device IGBT, PWM modulation signal, according to motor start-up property interval, are adopted with determining frequency modulation than control output
Take different starting control modes, reach motor smooth non-impacting start operation, make dc motor intrinsic mechanical property and
The good curve work of the holdings such as artificial influence, the electric drive system stable operation of mechanical property, armature-reaction to mechanical property.
After task to be launched, intelligent control exports bypass run signal automatically, controls delay investment, loaded work piece by external bypass
Electric current provides operation by bypass, and intelligent control is in online hot standby state, completes intelligent control starting control.
In this preferred embodiment, power device IGBT switching frequency fs=20kHz, VCEs minimum voltage is working power voltage
3 times, VGEs is not more than 20V, and IC minimum current calculates as follows:
Wherein, PD is motor nominal power, and φ is direct current drive engine efficiency.
When hard manual control device investment, as shown in Figure 6 and Figure 7, using electromagnetism master devices to DC electric motor
Pivot plays initial voltage definite value limited way and starts, and starts voltage or the bypass operation of time automatic switching according to it, realizes decompression current limliting
Control effect is quick started, the hard manual control purpose of emergency start emergency bearing oil pump is reached.Specifically, passing through definite value power resistor
The control method of decompression limitation load current realizes the operation of emergency flight control or test run, is calculated not according to motor power (output)
The revolving speed of motor is controlled to change motor start-up voltage with fixed value resistance and execution main device.When electrical power speed increases
When adding a timing or 10S, hard manual control exports by-passing signal automatically, and intelligent control exports bypass run signal automatically, by outer
Portion's by-pass unit control investment, loaded work piece electric current provide operation by by-pass unit, and skilled hand grasps starting control and automatically exits from, completes
Skilled hand grasps starting control.Characteristic when hard manual control starting current is as shown in Figure 8.
In the present invention, intelligent control bypass is a public by-pass unit with the bypass of hard manual control, each other independent fortune
Capable not to be affected, two control outputs directly in parallel can access dc motor, no longer need to add switching control.
On the basis of described above, the present invention can be realized following function.
1. lock operation indicates: locking any operational order, make the clear command source of operations staff.
2. fault self-diagnosis: can control device can voluntarily diagnose and currently work normally before operation or in starting operation,
Instruction and teletransmission status information in time, it is ensured that equipment safety operation.
3. being latched switching: it can directly switching skilled hand be grasped in intelligent control normal course of operation, non-impact current generates at this time,
Intelligent control automatic blocking stops simultaneously, and locking is only limitted to skilled hand and grasps locking intelligent control.
4. skilled hand operates: be mainly used in emergency starting, when intelligent control is abnormal or operates normally, not by a distant place or
Position limitation directly operates, and realizes skilled hand behaviour truly.
5. analog output: realizing that the master die analog quantity of load motor armature coil starting running current value is defeated by CT
Out, 4-20mA can access DCS system.
6. power monitoring: control device can to electrical source of power and control power supply real-time monitoring, in time warning on the spot and
Distant place DC power supply it is normal whether, while design display supply voltage and running current monitor value on the spot.
7. temperature alarm: when electric start or normal time run, when device internal power device temperature is more than 65-75 DEG C,
It alarms at once, but is not automatically stopped current operation, need artificial skilled hand behaviour.
8. status display: control cabinet door design point instruction display current working status be it is out of service, starting operation,
The status displays such as error protection and a distant place or Work in Place.
9. synchronous remote signalling output: shutting down, protection, operation, operational mode selection, be no source contact output, contact rating
For AC250V/5A.
10. distant place control input: startup-shutdown control, main-piping pressure booting control are grasped in the control of DCS system startup-shutdown, skilled hand,
It is instantaneous contact point signal.
11. main-piping pressure controls: when occur main-piping pressure it is too low when, can automatic linkage starting control, control is not by " remote
Side " or " on the spot " state limit.
12. a distant place or state is arranged online on the spot: such as after " on the spot " state starts normal operation, can arbitrarily set state
It is set in " distant place ", equipment keeps working normally unaffected；It, can be arbitrarily by state such as after " distant place " state starts normal operation
It is set as " on the spot ", equipment keeps working normally unaffected.
Claims (9)
1. skilled hand's behaviour's type emergency bearing oil pump control device, which is characterized in that including the skilled hand's manipulation being connected in parallel on oil pump direct current generator
Device and intelligent controlling device processed, and hard manual control device and the common by-pass unit of intelligent controlling device；
The hard manual control device receives the emergency instruction of thermal operating platform, under emergency conditions to direct current generator
Carry out decompression current limliting emergency start control；
The intelligent controlling device receives the control instruction of electric control system, under normal circumstances to direct current generator
Carry out starting control；
When executing DC MOTOR CONTROL, the intelligent controlling device of the hard manual control device locking low rights of high permission；When straight
When the starting current or revolving speed of galvanic electricity machine reach the setting percentage of rated value, hard manual control device or intelligent controlling device control
By-pass unit processed connects the armature coil positive terminal X3 of electrical source of power electrode input end X1 and direct current generator；
By locking contact device KM is arranged on the starting path of intelligent controlling device control on direct current generator；By skilled hand on direct current generator
It grasps and main power source switching control contactor KM1 is set on the starting path of control device control；Locking contact device KM and main power source are thrown
Control contactor KM1 is cut to be controlled by hard manual control device；
When working properly, locking contact device KM is normally closed, and main power source switching control contactor KM1 is normally opened；
When under emergency conditions, locking contact device KM is normally opened, and main power source switching control contactor KM1 is normally closed.
2. skilled hand behaviour type emergency bearing oil pump control device according to claim 1, which is characterized in that the intelligent control dress
It sets including PWM processing module, IGBT and Current Transmit；The drain electrode of IGBT connects electrical source of power electrode input end X1, emitter-base bandgap grading
The armature coil positive terminal X3 of direct current generator is connected, base stage connects the pwm pulse of PWM processing module；Current Transmit is used for
Acquire the input current of electrical source of power；PWM processing module is used to control IGBT output according to the acquisition signal of Current Transmit
Conducting carries out high frequency chopping processing to DC voltage, starts direct current generator by negative voltage feedback closed loop linear regulation.
3. skilled hand behaviour type emergency bearing oil pump control device according to claim 2, which is characterized in that intelligent controlling device also wraps
Include the first excitation contactor KMS being arranged on excitation of direct current generator access；First excitation contactor KMS is by PWM processing module
Control.
4. skilled hand behaviour type emergency bearing oil pump control device according to claim 1, which is characterized in that the hard manual control
Device includes hard manual control unit and definite value power resistor；Definite value power resistor is connected to electrical source of power electrode input end
Between X1 and the armature coil positive terminal X3 of direct current generator；Hard manual control unit passes through control for being latched intelligent controlling device
Formulation value power resistor starts direct current generator.
5. skilled hand behaviour type emergency bearing oil pump control device according to claim 4, which is characterized in that hard manual control device is also
Including the second excitation contactor KM3 being arranged on excitation of direct current generator access；Second excitation contactor KM3 is by hard manual control
Unit control.
6. skilled hand's behaviour's type emergency bearing oil pump control method, which is characterized in that grasped based on skilled hand described in claim 1-5 any one
Type emergency bearing oil pump control device, includes the following steps,
Step 1, when direct current generator needs to start, judge whether to start skilled hand behaviour, if so then execute step 2, otherwise judge whether
Start intelligent operation, it is standby if not the then described skilled hand's behaviour's type emergency bearing oil pump control device if it is thening follow the steps 3,
Repeat step 1；
Step 2, hard manual control device investment, is closed main power source switching control contactor KM1, connects main power source, pass through definite value
Power resistor is depressured current limliting, starts direct current generator, until investment by-pass unit is shorted definite value power resistor after starting successfully；
The skilled hand for completing direct current generator grasps starting；
Step 3, intelligent controlling device is put into, and is closed locking contact device KM, is connected main power source, is controlled by PWM processing module
IGBT output conducting, carries out high frequency chopping processing to DC voltage, starts direct current generator, until investment bypass is single after starting successfully
Member is shorted IGBT；Complete the intelligent starting of direct current generator.
7. skilled hand behaviour type emergency bearing oil pump control method according to claim 6, which is characterized in that in step 2, skilled hand's manipulation
When device processed is put into, locking contact device KM is opened in hard manual control device control, is latched intelligent controlling device.
8. skilled hand behaviour type emergency bearing oil pump control method according to claim 6, which is characterized in that in step 2 and step 3,
Before connecting main power source, hard manual control device and intelligent controlling device pass through closure the second excitation contactor KM3 and first respectively
Excitation contactor KMS connects excitation of direct current generator voltage.
9. skilled hand behaviour type emergency bearing oil pump control method according to claim 6, which is characterized in that in step 1, pass through detection
The emergency instruction from thermal operating platform whether is received to judge whether to start skilled hand behaviour；By detecting whether to receive from electric power control
The control instruction of system processed judges whether to start intelligent control operation.
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| CN114105026A (en) * | 2021-10-13 | 2022-03-01 | 华能汕头海门发电有限责任公司 | Oil pump control system with double IGBTs connected in parallel and double segmented resistors |
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| CN107171599A (en) | 2017-09-15 |
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