CN105927399A - Digital integrated controller of small biomass gas internal combustion generator unit and method - Google Patents
Digital integrated controller of small biomass gas internal combustion generator unit and method Download PDFInfo
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- CN105927399A CN105927399A CN201610436798.3A CN201610436798A CN105927399A CN 105927399 A CN105927399 A CN 105927399A CN 201610436798 A CN201610436798 A CN 201610436798A CN 105927399 A CN105927399 A CN 105927399A
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D29/00—Controlling engines, such controlling being peculiar to the devices driven thereby, the devices being other than parts or accessories essential to engine operation, e.g. controlling of engines by signals external thereto
- F02D29/06—Controlling engines, such controlling being peculiar to the devices driven thereby, the devices being other than parts or accessories essential to engine operation, e.g. controlling of engines by signals external thereto peculiar to engines driving electric generators
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D41/00—Electrical control of supply of combustible mixture or its constituents
- F02D41/02—Circuit arrangements for generating control signals
- F02D41/14—Introducing closed-loop corrections
- F02D41/1401—Introducing closed-loop corrections characterised by the control or regulation method
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D41/00—Electrical control of supply of combustible mixture or its constituents
- F02D41/22—Safety or indicating devices for abnormal conditions
- F02D41/221—Safety or indicating devices for abnormal conditions relating to the failure of actuators or electrically driven elements
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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
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/10—Internal combustion engine [ICE] based vehicles
- Y02T10/40—Engine management systems
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- Combustion & Propulsion (AREA)
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- General Engineering & Computer Science (AREA)
- Control Of Eletrric Generators (AREA)
Abstract
The invention discloses a digital integrated controller of a small biomass gas internal combustion generator unit and a method. The controller comprises a main control unit, and a detecting unit, a speed adjusting function unit, a pressure adjusting function unit, a grid-connection function unit, a human-computer interaction unit and a communication unit separately connected with the main control unit. The controller has the following beneficial effects: the controller has functions of adjusting the speed of a biomass gas internal combustion engine and the voltage of a synchronous generator, a generator grid-connection function, an output power detecting function and various protection functions, and integrates dispersed controllers, so a control system is simplified, the cost is reduced, and the integrated controller is convenient to install.
Description
Technical field
Patent of the present invention relates to a kind of biogas internal combustion engine generator group controller, particularly relates to one and possesses tune
The biogas internal combustion engine generator group integrated controller of speed, pressure regulation, cutting-in control and complete machine monitoring function and control
Method processed.
Background technology
World energy sources development has gone through twice major transformation, and for the first time before the industrial revolution, the mankind's is main
The energy is fuel wood.The appearance of steam engine, has promoted the carrying out of the industrial revolution for the first time, has also promoted coal gradually to take
For fuel wood.In 19 century 70 second industrial revolutions, the appearance of internal combustion engine makes oil progressively substitute
Coal.And along with the exhaustion increasingly of the non-renewable energy resources such as oil, natural gas, again that biogas etc. is renewable
The energy pushes to the teeth of the storm, and energy development is in third time Reform Period.Important set as regenerative resource
Becoming part, biomass energy quantity is the hugest, is one of energy most potential in 21 century energy supply.
Because it is from nature, pollution-free, simultaneously the most again reproducible utilization and cause the attention of various countries.At a few years from now on,
The market value of biomass power generation will increase to 53,000,000,000 dollars of the year two thousand twenty from 45,000,000,000 dollars of 2010.
The biomass energy of China is the abundantest, mainly includes the plant remnants discarded object produced in agricultural production, herds
The animal class remnants discarded object that fishery produces, the remaining discarded object of agro-industrial processing generation and rural urbanization house refuse
Deng.But, biomass energy source distribution is relatively decentralized, collects, transports and store difficulty, develops centralized living beings
Using energy source difficulty is relatively big, and therefore, small-sized biomass air cooling cogeneration system becomes solution China biomass energy
One of preferred plan of Utilizing question.Small-sized biomass air cooling cogeneration system refers generally to installed capacity and is less than
The system of 500kW, for major impetus device and sharp by reclaiming with biogas internal combustion engine or gas turbine
With the high-temperature flue gas of power set, jacket water, provide a user with electric energy, refrigeration and heat supply simultaneously.
Biogas internal combustion engine generator group is the nucleus equipment of the cold and hot conversion of living beings pneumoelectric, and controller is to determine it
The critical component of performance.Biogas internal combustion engine generator group controller mainly includes speed regulator, pressure regulator, igniting
Controller and complete machine watch-dog.Currently mainly there are the following problems:
(1) speed regulator and pressure regulator mostly are analog circuitry system, its complex circuit designs, and debugging step is loaded down with trivial details,
Once breaking down, maintenance difficulty is big.
(2) control system that most biogas internal combustion engine generator groups use has multiple controller to constitute,
Speed regulator, pressure regulator, ignition controller and complete machine watch-dog are separate.Speed setting controller is merely responsible for rotating speed and adjusts
Joint, voltage regulator controllers is responsible for maintaining output voltage stabilization, function and space layout is kept completely separate, the system integration
Spend low, inconvenience is installed.
(3) independent due to each controller, it is impossible to data exchange in time, usual each controller all possesses data acquisition
, both having there is functional redundancy problem in collection, control performance element, cannot realize again whole generating set data in real time altogether
Enjoying, total tune is poor.
(4) speed regulator, pressure regulator and the freestanding structure of complete machine watch-dog, limit system response time,
Extend system response time, use integrated controller, the Whole Response speed of control system can be made to carry
High 30%～50%.
(5) controller cpu performance is powerful at present, calculates speed quickly, and peripheral resource enriches.Speed governing, tune
Pressure uses multiple independent controllers with complete machine monitoring, easily causes the wasting of resources, increases cost.
The most not yet find at present to be exclusively used in small-sized biomass gas internal combustion engine generator group, have speed governing, pressure regulation, grid-connected with
The digital integrated controller of complete machine monitoring function.
Summary of the invention
The present invention is to solve the problems referred to above, it is proposed that a kind of small-sized biomass gas internal combustion engine generator group digital
Body controller and method so that it is there is internal combustion engine speed governing, synchronous generator pressure regulation, generator connecting in parallel with system and complete machine
Monitoring function, improves the integrated level of system, shortens system response time, simplifies system architecture, reduces
Development cost.
For achieving the above object, the present invention uses following technical proposals:
A kind of small-sized biomass gas internal combustion engine generator group digital integrated controller, including: main control unit and
The detector unit that is connected respectively with main control unit, speed-regulating function unit, voltage regulation function unit, grid-connected functional unit,
Man-machine interaction unit and communication unit；
Voltage and the grid-connected busbar voltage of biogas internal combustion engine generator group are detected by detector unit in real time,
When generator output voltage meets grid-connected conditions, it is grid-connected that grid-connected functional unit controls combined floodgate, and generator enters also
Running State；When generator output voltage is unsatisfactory for grid-connected conditions, respectively by speed-regulating function unit and tune
Generator generating unit speed and voltage are adjusted by pressure functional unit, until generator voltage meets grid-connected conditions.
The data of described detector unit detection include that the voltage of biogas internal combustion engine generator group, electric current, frequency are believed
Breath, engine oil pressure, water temperature, rotary speed information and grid-connected busbar voltage, frequency information.
Further, described main control unit includes: data acquisition unit, data processing unit and alarm and protection list
Unit；
Described data acquisition unit is for carrying out at A/D conversion, signal capture the input signal of detector unit
Reason；Described data processing unit carries out digital filtering by the data obtaining data acquisition unit, data calculate,
Obtain the control output result of other functional units；Alarm and protection unit is by data acquisition unit, data
The judgement of relevant parameter in reason unit, completes the sound and light alarm to generating set fault message, stoppage protection control.
Further, described speed-regulating function unit is given as controlling target with internal combustion rotary speed of generator group, and reality turns
Speed, as feedback quantity, when actual speed and given rotating speed generation deviation, controls journey by main control unit medium speed
The PID result of calculation of sequence, carries out PWM to gaseous mixture throttle gate control voltage, to adjust mixing
The air inflow of gas, maintains stabilization of speed.
Further, described voltage regulation function unit includes: rectification unit and excitation voltage output unit；Rectification list
Unit carries out rectification, filtering to generator alternating current output voltage, obtains galvanic current source；Excitation voltage exports
Unit carries out PWM tune according to excitation con-trol program PID result of calculation, the dc source obtaining rectification unit
System, controls excitation voltage output, it is ensured that generator output voltage is stable.
Further, described grid-connected functional unit detects generator voltage and grid-connected busbar voltage in real time, works as generating
When machine output voltage meets grid-connected conditions, it is grid-connected that cutting-in control performance element controls combined floodgate, and generator enters grid-connected
Running status；When generator output voltage is unsatisfactory for grid-connected conditions, by speed-regulating function unit and voltage regulation function
Rotary speed of generator group and voltage are adjusted by unit respectively, until generator voltage meets grid-connected conditions.
Further, described speed-regulating function unit, voltage regulation function unit and grid-connected functional unit synthetic operation or
Separate operation；By speed-regulating function unit, voltage regulation function unit and the enable module of grid-connected functional unit,
Said units is carried out independent switch control.
A kind of control method of small-sized biomass gas internal combustion engine generator group digital integrated controller, including:
(1) detection of generator output voltage, frequency and internal-combustion engine rotational speed is carried out；
(2) set biogas internal combustion engine generator group and start successful condition, judge according to above-mentioned testing result
Whether generating set meets starts successful condition, if it is satisfied, excision starter motor；Otherwise, step (1) is returned；
(3) judge biogas internal combustion engine generator group the need of being incorporated into the power networks, if it is, enter step (4)；
Otherwise, unit operation control model is entered；
(4) judge whether to meet grid-connected conditions according to generator output voltage and grid-connected busbar voltage；If it is,
Control combined floodgate grid-connected, enter step (5)；Otherwise, unit operation control model is entered；
(5) grid-connected bus bar side voltage is detected in real time, with grid-connected bus bar side voltage for controlling target, by sending out
Group of motors rotating speed, output voltage are adjusted so that generating set is incorporated to bus；Generator connecting in parallel with system running
In, according to the power output of user setup, by adjusting generating set air inflow to realize generator active power
Regulation, realizes generator reactive power regulation by adjusting generator excitation voltage；
(6) in biogas internal combustion engine generator group running, in real time the detection rotating speed of generating set, voltage,
Electric current, load and frequency information, it is judged that generating set is the need of shutdown, if it is, compressor emergency shutdown；No
Then, unit is properly functioning, returns step (3).
Further, in described step (2), biogas internal combustion engine generator group starts successful condition and includes:
Set idling for internal combustion engine value, reach idle speed value and i.e. think if meeting internal-combustion engine rotational speed and start successfully；
Or, setting idling for internal combustion engine value and alternator output frequency preset value, reaching if meeting internal-combustion engine rotational speed
To idle speed value, and alternator output frequency reaches preset value and then thinks and start successfully.
Further, during generating set unit operation control model,
By regulating the gaseous mixture air inflow of internal combustion engine, it is ensured that internal-combustion engine rotational speed is stable in rated speed；
By regulator generator excitation, it is ensured that generator output voltage is stable in rated voltage；
Detection generating set running state parameter in real time, when a certain parameter exceedes unit alarm threshold value but not less than machine
During group shutdown threshold, unit is not shut down but is sent warning；When a certain parameter exceedes compressor emergency shutdown threshold value, unit
Shut down and send warning.
The invention has the beneficial effects as follows:
1. biogas internal combustion engine generator group digital integrated controller, not only has biogas internal combustion engine
Speed governing and synchronous generator voltage regulation function, also have generator connecting in parallel with system function, power output detection function and various
Defencive function, by scattered controller integration, simplifies control system, reduces cost, it is simple to install.
2. the speed governing of generating set, pressure regulation and grid-connected function have been unified by integrated controller, each function list
Unit's harmony is good, improves the dynamic property of real-time response.
3. by host computer or man-machine interaction unit, user can as required, to speed governing, pressure regulation and
Net function carries out independent switch, simple to operate, it is adaptable to generating set unit and being incorporated into the power networks.
Accompanying drawing explanation
Fig. 1 is the structured flowchart of the present invention；
Fig. 2 is the control flow chart of the present invention；
Wherein, 1, main control unit, 2, detector unit, 3, function button unit, 4, speed-regulating function unit,
5, voltage regulation function unit, 6, grid-connected functional unit, 7, liquid crystal display, 8, communication unit.
Detailed description of the invention
The invention will be further described with embodiment below in conjunction with the accompanying drawings.
Biogas internal combustion engine generator group digital integrated controller, as it is shown in figure 1, include parameter detecting system
System, master control system, speed-regulating function system, voltage regulation function system, grid-connected function system, protection system, man-machine
Interactive system and communication system.
(1) parameter detecting system is for nursing one's health external input signal, for master control system data acquisition,
Including generator parameter testing circuit, engine parameter testing circuit and grid-connected bus electrical parameter detection circuit.Generating
Machine electrical parameter detection circuit includes the modulate circuit of the signals such as generator voltage, electric current, power, frequency；Engine
Electrical parameter detection circuit includes the modulate circuit of the signals such as engine oil pressure, water temperature, rotating speed；Grid-connected bus parameter is examined
Slowdown monitoring circuit refers mainly to the modulate circuit of grid-connected bus voltage signal.
(2) master control system is used for realizing all software control code of controller, including data acquisition and procession journey
Sequence, rotation speed control program, excitation con-trol program, cutting-in control program, generating set defence program and data are logical
Letter program etc..
(3) speed-regulating function system includes that the rotation speed control program in master control system and hardware perform circuit, rotating speed
Control program, with rated speed for controlling target, is calculated spin rate control quantity by PID, performs for hardware
Circuit PWM is modulated；Hardware performs circuit and is divided into light-coupled isolation unit and metal-oxide-semiconductor driver element, optocoupler every
Use high speed photo coupling from unit, the PWM modulation signal between main control unit and metal-oxide-semiconductor driver element is entered
Row isolation, improves system rejection to disturbance ability；Metal-oxide-semiconductor driver element is constituted based on special metal-oxide-semiconductor driving chip,
To ensure metal-oxide-semiconductor working stability.
(4) excitation con-trol program and hardware during voltage regulation function system includes rectification unit, master control system perform
Circuit, rectification unit is by generator alternating current output voltage rectification, filtering, obtaining galvanic current source；
Excitation con-trol program, with rated voltage for controlling target, uses pid control mode, calculates PWM control
Amount processed；Hardware performs circuit and uses photoelectrical coupler to realize the isolation of pwm signal and the driving of metal-oxide-semiconductor,
The conversion of the DC/DC to rectifier power source gained dc source is completed by metal-oxide-semiconductor being carried out PWM, real
Time regulation exciter excitation voltage.
(5) grid-connected function system includes that the cutting-in control program in master control system and cutting-in control perform circuit,
Cutting-in control program Real-time Collection, parsing generator voltage and grid-connected busbar voltage, when generator output voltage width
When value, phase place, frequency, phase sequence meet grid-connected conditions, cutting-in control performs circuit control and closes a floodgate grid-connected, generating
Machine enters the state that is incorporated into the power networks；When generator output voltage is unsatisfactory for grid-connected conditions, controller passes through speed governing merit
System with voltage regulation function system, rotary speed of generator group and voltage can be adjusted, until generator voltage meets also
Till net condition.
During being incorporated into the power networks, adjusting generating set air inflow by speed-regulating function unit has to realize generator
Merit power adjusting, voltage regulation function unit adjusts generator excitation voltage and realizes generator reactive power regulation.
(6) protection system is for the safe operation of real-time guard biogas internal combustion engine generator group, prevents from running
During hypervelocity occur, owe speed, overvoltage, the mistake problem such as stream, overload, overclocking, under-frequency.
(7) man-machine interactive system includes liquid crystal display and function button, and liquid crystal display is in real time
Display biogas internal combustion engine generator group running in relevant parameter, by man-machine interactive system, can to rotating speed,
The isoparametric rated value of voltage, electric current and alarm threshold value are configured, it is also possible to speed governing, pressure regulation and grid-connected merit
Independent switch can be carried out.
(8) communication system includes that RS485/Modbus communication communicates with GPRS two kinds of communication modes,
RS485/Modbus communication realizes being connected with host computer, by real to generating set and grid-connected bus parameters
Time transmission to host computer, meanwhile, receive from the control instruction of host computer, complete generating set
Control；GPRS communication occurs SMS alarm during cancel closedown in generating set running.
More detailed implementation process be described below:
As it is shown in figure 1, biogas internal combustion engine generator group digital integrated controller, including main control unit 1,
Detector unit 2, function button 3, speed-regulating function unit 4, voltage regulation function unit 5, grid-connected functional unit 6,
Liquid crystal display 7, communication unit 8.
Main control unit 1, with STM32F103ZET6 as core, completes biogas internal combustion engine generator group digital
The data acquisition of integrated controller, data process and alarm and protection function, and liquid crystal display 6 is in real time
Display generating set parameters, generating set allows by liquid crystal display 6 and function in running
Rotating speed, the isoparametric rated value of voltage and alarm threshold value are modified by push-button unit 3, also can exchange meanwhile
Speed, pressure regulation, grid-connected function carry out independent switch.
Biogas internal combustion engine generator group is starting with in running, and tach signal is adjusted by detector unit 2
Reason, main control unit 1 gathers the tach signal after conditioning, and actual speed is entered by rotation speed control program with rated speed
Row contrast, according to the deviation of actual speed Yu rated speed, carries out PID calculating, adjusts speed-regulating function unit 4
In pwm signal pulse width, thus change electronic actuators control voltage, make internal-combustion engine rotational speed maintain
Rated speed；Voltage regulation function unit 5 rectification module carries out rectification to generator alternating current output voltage, filtering processes,
Obtain galvanic current source, meanwhile, the generator output electricity after the conditioning of main control unit 1 acquisition testing unit 2
Pressure signal, virtual voltage is compareed by excitation con-trol program with rated voltage, carries out PID calculating according to deviation,
By pressure regulation functional unit 5 rectification module gained dc source is carried out PWM, it is achieved to rectification unit
The DC/DC conversion of gained dc source, changes exciter excitation voltage, makes synchronous generator output voltage tie up
Hold in rated voltage.
Biogas internal combustion engine generator group is after starting grid-connected function, and detector unit 2 is to grid-connected busbar voltage and sends out
Electric moter voltage carries out being depressured, changing the process such as datum mark, completes the complete cycle to voltage signal for main control unit 1
Sampling, voltage signal after main control unit 1 sampling conditioning also carries out signals revivification to it, resolves two voltages and believe
Number actual magnitude, phase place etc., when generator output voltage and grid-connected busbar voltage amplitude, frequency, phase place,
When phase sequence meets grid-connected conditions, it is grid-connected that cutting-in control unit 6 controls combined floodgate, and generator enters the state that is incorporated into the power networks；
When generator output voltage is unsatisfactory for grid-connected conditions, right by speed-regulating function unit 4 and voltage regulation function unit 5
The rotating speed of generating set, voltage are adjusted, until it meets grid-connected conditions.
During being incorporated into the power networks, adjust generating set air inflow to realize generator by speed-regulating function unit 4
Active power regulation, voltage regulation function unit 5 adjusts generator excitation voltage and adjusts to realize generator reactive power
Joint.
In biogas internal combustion engine generator group running, once unit occur hypervelocity, owe speed, overvoltage, cross flow,
The problems such as overload, overclocking, under-frequency, main control unit 1 is produced relative alarm, and is shown by liquid crystal display 7
Showing concrete warning message, this parameter is not recovered to normal range (NR) at the appointed time, and main control unit 1 i.e. controls to send out
Group of motors carries out stoppage protection, it is ensured that unit and personal security, and meanwhile, GPRS communication module is to administrative staff
Send note report generating set outage information.
In biogas internal combustion engine generator group controller running, communication unit 8 by internal combustion engine relevant parameter,
Generator relevant parameter and grid-connected bus relevant parameter real-time Transmission are to host computer, receive from upper meanwhile
The control instruction of bit machine, makes user can complete the control to generating set by host computer.
A kind of control method of small-sized biomass gas internal combustion engine generator group digital integrated controller, including:
(1) detection of generator output voltage, frequency and internal-combustion engine rotational speed is carried out；
(2) set biogas internal combustion engine generator group and start successful condition, judge according to above-mentioned testing result
Whether generating set meets starts successful condition, if it is satisfied, excision starter motor；Otherwise, step (1) is returned；
(3) judge biogas internal combustion engine generator group the need of being incorporated into the power networks, if it is, enter step (4)；
Otherwise, unit operation control model is entered；
(4) judge whether to meet grid-connected conditions according to generator output voltage and grid-connected busbar voltage；If it is,
Control combined floodgate grid-connected, enter step (5)；Otherwise, unit operation control model is entered；
(5) grid-connected bus bar side voltage is detected in real time, with grid-connected bus bar side voltage for controlling target, by sending out
Group of motors rotating speed, output voltage are adjusted so that generating set is incorporated to bus；Generator connecting in parallel with system running
In, according to the power output of user setup, by adjusting generating set air inflow to realize generator active power
Regulation, realizes generator reactive power regulation by adjusting generator excitation voltage；
(6) in biogas internal combustion engine generator group running, in real time the detection rotating speed of generating set, voltage,
Electric current, load and frequency information, it is judged that generating set is the need of shutdown, if it is, compressor emergency shutdown；No
Then, unit is properly functioning, returns step (3).
Biogas internal combustion engine generator starts success conditions and judges, generating set of the present invention starts success conditions and includes
Internal-combustion engine rotational speed, alternator output frequency, wherein internal-combustion engine rotational speed is basic Rule of judgment, not maskable, sends out
Motor output frequency is optional Rule of judgment, can be shielded by human-computer interaction interface and enable, if shielding is sent out
Motor output frequency Rule of judgment, in generating set start-up course, as long as internal-combustion engine rotational speed reaches idling and i.e. thinks
Start successfully；If enabling alternator output frequency Rule of judgment, then generating set is in start-up course, it is necessary to
Time meet that internal-combustion engine rotational speed reaches idling, alternator output frequency reaches preset value and just can think and start successfully.
Biogas internal combustion engine generator group operational mode judges, the present invention has two kinds of mode of operations: unit operation
Pattern, be incorporated into the power networks pattern, and generating set is after starting successfully, according to the selection of user or work in unit fortune
Row mode, or work in the pattern of being incorporated into the power networks.
Generating set under unit operation pattern runs and controls, and under unit operation pattern, controller is used for generator
Group speed governing, pressure regulation, set state detection and protection, combined floodgate Generation Control.During speed regulating control, by regulation
The gaseous mixture air inflow of combustion engine, it is ensured that internal-combustion engine rotational speed is stable in rated speed；During Regulation Control, by regulation
Generator excitation, it is ensured that generator output voltage is stable in rated voltage；Set state detects, including unit oil
Pressure, water temperature, internal-combustion engine rotational speed, the parameter detecting such as generator output voltage, electric current, power, frequency, when certain
It is relatively big (reaching shutdown threshold) that item parameter exceedes normal range value, and controller is reported to the police, and compressor emergency shutdown, if exceeding
Normal range value less (not yet reaching shutdown threshold), controller warning, unit is not shut down；During unit operation,
Generating set is for powering to electrical equipment, if generator output voltage and frequency reach rated value, unit enters
Allowing "on" position, the combined floodgate power transmission upon receipt of user instructs, and controller controls generator and closes a floodgate；If sending out
Motor output voltage and frequency are relatively big with rated value deviation, even if user sends reclosing command to controller, control
Device does not the most allow generator combined floodgate power transmission.
Generating set under the pattern that is incorporated into the power networks runs and controls, and is incorporated into the power networks under pattern, and controller is not only to unit
State parameter detects, and detects grid-connected bus bar side voltage the most in real time, when generating set is not yet incorporated to bus,
Controller contrast generator output voltage and grid-connected busbar voltage, if both frequencies, phase place, phase sequence are consistent,
Amplitude differs within 5%, i.e. controls generating set and is incorporated to bus；If both frequencies, phase place, phase sequence differ
Cause or amplitude differs more than 5%, according to actual deviation situation, with busbar voltage for controlling target, by right
Rotary speed of generator group, voltage are adjusted so that the frequency of generator output voltage, phase place, phase sequence and bus
Voltage is consistent, and amplitude differs within 5%, thus is incorporated into the power networks；When generating set has been incorporated into bus,
According to the power output of user setup, adjust generating set active power by regulation air inlet, by regulation excitation
Adjust generating set reactive power.
Biogas internal combustion engine generator group is shut down and is controlled, when generating set occurs that abnormal conditions need emergency shutdown or connect
Receive the halt instruction from user, if controller works in unit operation pattern, first disconnect combined floodgate power transmission and continue
Electrical equipment, stops powering to electrical equipment, and then stops internal combustion engine biogas air inlet, it is achieved generating set is shut down；
If controller works in the pattern of being incorporated into the power networks, first disconnect grid-connected control relay so that generating set departs from also
Net bus, and then stop internal combustion engine gaseous mixture air inlet, it is achieved generating set is shut down.
Although the detailed description of the invention of the present invention is described by the above-mentioned accompanying drawing that combines, but not the present invention is protected
Protecting the restriction of scope, one of ordinary skill in the art should be understood that on the basis of technical scheme, this
Skilled person need not to pay various amendments or deformation that creative work can make still the present invention's
Within protection domain.
Claims (10)
1. a small-sized biomass gas internal combustion engine generator group digital integrated controller, is characterized in that, including:
Main control unit and the detector unit being connected respectively with main control unit, speed-regulating function unit, voltage regulation function unit,
Grid-connected functional unit, man-machine interaction unit and communication unit；
Voltage and the grid-connected busbar voltage of biogas internal combustion engine generator group are detected by detector unit in real time,
When generator output voltage meets grid-connected conditions, it is grid-connected that grid-connected functional unit controls combined floodgate, and generator enters also
Running State；When generator output voltage is unsatisfactory for grid-connected conditions, respectively by speed-regulating function unit and tune
Generator generating unit speed and voltage are adjusted by pressure functional unit, until generator voltage meets grid-connected conditions.
2. a kind of small-sized biomass gas internal combustion engine generator group digital integrated as claimed in claim 1 controls
Device, is characterized in that, the data of described detector unit detection include the voltage of biogas internal combustion engine generator group, electricity
Stream, frequency information, engine oil pressure, water temperature, rotary speed information and grid-connected busbar voltage, frequency information.
3. a kind of small-sized biomass gas internal combustion engine generator group digital integrated as claimed in claim 1 controls
Device, is characterized in that, described main control unit includes: data acquisition unit, data processing unit and alarm and protection list
Unit；
Described data acquisition unit is for carrying out at A/D conversion, signal capture the input signal of detector unit
Reason；Described data processing unit carries out digital filtering by the data obtaining data acquisition unit, data calculate,
Obtain the control output result of other functional units；Alarm and protection unit is by data acquisition unit, data
The judgement of relevant parameter in reason unit, completes the sound and light alarm to generating set fault message, stoppage protection control.
4. a kind of small-sized biomass gas internal combustion engine generator group digital integrated as claimed in claim 1 controls
Device, is characterized in that, described speed-regulating function unit is given as controlling target with internal combustion rotary speed of generator group, and reality turns
Speed, as feedback quantity, when actual speed and given rotating speed generation deviation, controls journey by main control unit medium speed
The PID result of calculation of sequence, carries out PWM to gaseous mixture throttle gate control voltage, to adjust mixing
The air inflow of gas, maintains stabilization of speed.
5. a kind of small-sized biomass gas internal combustion engine generator group digital integrated as claimed in claim 1 controls
Device, is characterized in that, described voltage regulation function unit includes: rectification unit and excitation voltage output unit；Rectification list
Unit carries out rectification, filtering to generator alternating current output voltage, obtains galvanic current source；Excitation voltage exports
Unit carries out PWM tune according to excitation con-trol program PID result of calculation, the dc source obtaining rectification unit
System, controls excitation voltage output, it is ensured that generator output voltage is stable.
6. a kind of small-sized biomass gas internal combustion engine generator group digital integrated as claimed in claim 1 controls
Device, is characterized in that, described grid-connected functional unit detects generator voltage and grid-connected busbar voltage in real time, works as generating
When machine output voltage meets grid-connected conditions, it is grid-connected that cutting-in control performance element controls combined floodgate, and generator enters grid-connected
Running status；When generator output voltage is unsatisfactory for grid-connected conditions, by speed-regulating function unit and voltage regulation function
Rotary speed of generator group and voltage are adjusted by unit respectively, until generator voltage meets grid-connected conditions.
7. a kind of small-sized biomass gas internal combustion engine generator group digital integrated as claimed in claim 1 controls
Device, is characterized in that, described speed-regulating function unit, voltage regulation function unit and grid-connected functional unit synthetic operation or
Separate operation；By speed-regulating function unit, voltage regulation function unit and the enable module of grid-connected functional unit,
Said units is carried out independent switch control.
8. a small-sized biomass gas internal combustion engine generator group digital integrated as claimed in claim 1 controls
The control method of device, is characterized in that, including:
(1) detection of generator output voltage, frequency and internal-combustion engine rotational speed is carried out；
(2) set biogas internal combustion engine generator group and start successful condition, judge according to above-mentioned testing result
Whether generating set meets starts successful condition, if it is satisfied, excision starter motor；Otherwise, step (1) is returned；
(3) judge biogas internal combustion engine generator group the need of being incorporated into the power networks, if it is, enter step (4)；
Otherwise, unit operation control model is entered；
(4) judge whether to meet grid-connected conditions according to generator output voltage and grid-connected busbar voltage；If it is,
Control combined floodgate grid-connected, enter step (5)；Otherwise, unit operation control model is entered；
(5) grid-connected bus bar side voltage is detected in real time, with grid-connected bus bar side voltage for controlling target, by sending out
Group of motors rotating speed, output voltage are adjusted so that generating set is incorporated to bus；Generator connecting in parallel with system running
In, according to the power output of user setup, by adjusting generating set air inflow to realize generator active power
Regulation, realizes generator reactive power regulation by adjusting generator excitation voltage；
(6) in biogas internal combustion engine generator group running, in real time the detection rotating speed of generating set, voltage,
Electric current, load and frequency information, it is judged that generating set is the need of shutdown, if it is, compressor emergency shutdown；No
Then, unit is properly functioning, returns step (3).
9. a kind of small-sized biomass gas internal combustion engine generator group digital integrated as claimed in claim 1 controls
The control method of device, is characterized in that, in described step (2), biogas internal combustion engine generator group starts successfully
Condition include:
Set idling for internal combustion engine value, reach idle speed value and i.e. think if meeting internal-combustion engine rotational speed and start successfully；
Or, setting idling for internal combustion engine value and alternator output frequency preset value, reaching if meeting internal-combustion engine rotational speed
To idle speed value, and alternator output frequency reaches preset value and then thinks and start successfully.
10. a kind of small-sized biomass gas internal combustion engine generator group digital integrated as claimed in claim 1 controls
The control method of device, is characterized in that, during generating set unit operation control model,
By regulating the gaseous mixture air inflow of internal combustion engine, it is ensured that internal-combustion engine rotational speed is stable in rated speed；
By regulator generator excitation, it is ensured that generator output voltage is stable in rated voltage；
Detection generating set running state parameter in real time, when a certain parameter exceedes unit alarm threshold value but not less than machine
During group shutdown threshold, unit is not shut down but is sent warning；When a certain parameter exceedes compressor emergency shutdown threshold value, unit
Shut down and send warning.
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