CN108199416A - Digital electricity generating system with simultaneously machine synchronizing function - Google Patents
Digital electricity generating system with simultaneously machine synchronizing function Download PDFInfo
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- CN108199416A CN108199416A CN201810157728.3A CN201810157728A CN108199416A CN 108199416 A CN108199416 A CN 108199416A CN 201810157728 A CN201810157728 A CN 201810157728A CN 108199416 A CN108199416 A CN 108199416A
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- module
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- generator
- control system
- chip computer
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J3/00—Circuit arrangements for ac mains or ac distribution networks
- H02J3/38—Arrangements for parallely feeding a single network by two or more generators, converters or transformers
- H02J3/40—Synchronising a generator for connection to a network or to another generator
- H02J3/42—Synchronising a generator for connection to a network or to another generator with automatic parallel connection when synchronisation is achieved
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J3/00—Circuit arrangements for ac mains or ac distribution networks
- H02J3/38—Arrangements for parallely feeding a single network by two or more generators, converters or transformers
- H02J3/40—Synchronising a generator for connection to a network or to another generator
- H02J3/44—Synchronising a generator for connection to a network or to another generator with means for ensuring correct phase sequence
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Supply And Distribution Of Alternating Current (AREA)
- Control Of Eletrric Generators (AREA)
Abstract
The invention discloses a kind of digital electricity generating systems with simultaneously machine synchronizing function, belong to generator inverter field, the system by add single-chip computer control system, auxiliary power module and and machine synchronization module come realize generator and machine synchronizing function, wherein and machine synchronization module includes varying DC link voltage module, bus voltage measurement module, SPWM control modules and synchronous detection module, the output terminal connection auxiliary power module of the generator, the auxiliary power module are powered respectively to simultaneously machine synchronization module and single-chip computer control system.The present invention can be realized in heterogeneous networks voltage and frequency and machine synchronizing function, so as to and when machine avoid generating to generating set and load harmful high current or high-voltage impact, for different types of generator and machine versatility bring great convenience.
Description
Technical field
The invention belongs to the circuit devices of distribution network, are related to generator inverter field, are that one kind can be with specifically
It carries out and the digital frequency conversion generator inverter of machine, can avoid producing when grid-connected or in parallel in heterogeneous networks voltage and frequency
The raw high current harmful to generating set and load or high-voltage impact.
Background technology
Small movable generating set rescue and relief work, mine, military affairs, field work, mobile telecommunication base station etc. it is numerous should
There is indispensable important function with field.In recent years, improving, particularly have benefited from due to Power Electronic Technique and device
Digital technology using microcontroller as representative develops, and one kind is compared with conventional electric power generation unit, with clearly technology and economy are excellent
Mobile small generator-digital electricity generating of gesture quickly emerges, and replaces conventional electric generators rapidly.
Compared with conventional electric generators, the alternating current generator of digital electricity generating is directly combined with engine, eliminates flywheel,
So that digital electricity generating reduces 50% in size and weight, it can be applied to many entertainment places and small portable be electronic
Tool, this revolutionizes tradition image of the generating equipment in consumer's in the eyes of " big-stupid-thick ".
Furthermore the original alternating current that digital electricity generating generates passes through " purification ", and electric current passes through " cross-straight-intersection " two level conversion,
Make voltage output unrelated with engine speed, while voltage waveform distortion is minimized, be finally again converted into it is clean,
Steadily, the exchange electricity output of high quality, this electric current are very suitable for some electrical equipments and instrument very sensitive to voltage fluctuation
Device, such as：Computer, facsimile machine, printer, communication apparatus etc..However unit digital electricity generating has obtained widely should at present
With, but between the digital electricity generating group in digital electricity generating group particularly different dynamic source and machine operation control technology still in rise
Step section.
Generator parallel must meet following 5 primary conditions：, voltage it is equal；, frequency it is equal；, phase it is equal；, phase sequence it is consistent；, output characteristics it is equal；Only meet above five primary conditions just can and machine.WhereinItem is by sending out
Motor installation wiring condition meets, theItem considers when choosing generator type by user.Therefore generator inverter is simultaneously
During machine, 3 conditions before meeting mainly are considered how.
As shown in Figure 1, power station or electricity generation unit and machine, are carried out simultaneously by special large size " and cabinet "
Machine, to reach above-mentioned and machine condition, still, mobile or portable power generation unit only supplies local small-power power demand,
Economically consider, it is impossible to special parallel operation device be configured, it is necessary to from the inverter design of digital electricity generating, meet
And machine needs.
Countries in the world power network rated voltage and rated frequency regulation be different, be summed up it is as shown in the table,
Two class generators are segmented into, using voltage center's value as I class of 120V, using voltage center's value as II class of 230V.
Simultaneously the generator voltage of machine or frequency any one parameter are differed for grid-connected either, are unable to carry out
Grid-connected or simultaneously machine.Even if currently existing digital electricity generating system is under same generator power grade, generator inversion
The type of device just compares more.For example I class, II class can meet client's needs of country variant with regard to 6 kinds of inverters of each needs.
However, current digital electricity generating it is impossible to meet and it is confidential ask, widespread practice is, when and machine there is high current
Or during high-voltage impact, starting protection circuit is cut off the power immediately, to protect the load on generating set and circuit, this
Input failure, puts into again again after a period of time.So during digital electricity generating and machine, can often occur throwing repeatedly
Enter to power off the bad phenomenon of failure repeatedly.
In some application scenarios, such as mobile communication base station, computer centralized management station, even the power-off of moment is also not
Allow.Even if not interrupting communication or protection data to ensure communication in the case where feeder line fault causes to have a power failure,
The uninterruption power source of more unattended small power generation units and battery pack composition becomes standard configuration；In order to energy saving, hair
The input number of units of motor group must be adjusted according to the needs of load.Input and mistake out of service in digital electricity generating group
Cheng Zhong, it is necessary to ensure thatFor electrically continuous；2. it avoids generating the high current harmful to generating set and communication load or high electricity
Pressure impact.It is not powered off when therefore developing digital electricity generating and machine, without impact technology, there is great application value.
Invention content
The present invention is intended to provide a kind of can be in the digital electricity generating that heterogeneous networks voltage is carried out with frequency and machine is synchronous
System can avoid generating to generating set and load harmful high current or high-voltage impact.
To realize the above-mentioned technical purpose, the technical solution adopted by the present invention is as follows：
A kind of have and the digital electricity generating system of machine synchronizing function, including can by and machine controller and machine to busbar on
Several generating sets, the busbar are connected by emergency power supply automatic change-over and loaded, and each generating set includes connecting successively
Generator, rectification module and the inverter power module connect, the output terminal connection of the inverter power module and machine controller,
It further includes single-chip computer control system, auxiliary power module and simultaneously machine synchronization module, described and machine synchronization module includes busbar voltage
Adjustment module, bus voltage measurement module, SPWM control modules and synchronous detection module, the single-chip computer control system lead to respectively
Varying DC link voltage module connection rectification module is crossed, inverter power module, the inverter are connected by SPWM control modules
The output terminal of power module connects single-chip computer control system by synchronous detection module, and the output terminal of the rectification module passes through mother
Line voltage measurement module connects single-chip computer control system, the output terminal connection auxiliary power module of the generator, auxiliary electricity
Source module is powered respectively to simultaneously machine synchronization module and single-chip computer control system.
Using the digital electricity generating system of above-mentioned technical proposal, when power outage occurs, emergency power supply automatic conversion is opened
Load is switched on busbar by pass, and then and machine controller determines the input of generating set by the bearing power calculated on busbar
With exit, after generating set is put into, first by synchronous detection module to busbar carry out voltage, frequency, phase, phase sequence inspection
Survey, the network on the busbar detected and phase parameter then read in single-chip computer control system, and with local frequency and
Phase is compared, if it find that any parameter is unsatisfactory for and the condition of machine input, then by SPWM control modules to the machine phase
Related parameter is adjusted, until meeting and after machine condition, can power to the load, in power supply process, pass through busbar voltage
Measurement module and varying DC link voltage module control rectification module so that the output voltage grade of generator meets network voltage
Class requirement.
It further limits, further includes throttle adjustment module, the input terminal connection microcontroller control of the throttle adjustment module
System, output terminal connection generator, and the power supply of throttle adjustment module is powered by auxiliary power module.Pass through throttle adjustment module
It is capable of the output power of regulator generator so that the output power reasonable distribution of each generating set.
Compared with prior art, for the generator of equal-wattage grade, aforementioned I class, II class generator only respectively need the present invention
A kind of inverter is wanted just to disclosure satisfy that client's needs of country variant, the design, manufacture and use for greatly increasing inverter are general
Property, for different types of generator and machine versatility bring greatly it is easy-to-use.
Description of the drawings
Fig. 1 is existing Generator Set and machine schematic diagram；
Fig. 2 is the structure diagram of the embodiment of the present invention；
Fig. 3 is the circuit diagram of synchronous detection module.
Corresponding mark is respectively in figure：1- busbares, 11- emergency power supply automatic change-overs, 2- and machine controller, 3- inversions
Device power module, 4- rectification modules, 5- generators, 6- single-chip computer control systems, 7- accessory power supplys, 8- and machine synchronization module, 81-
Synchronous detection module, 82-SPWM control modules, 83- varying DC link voltage modules, 84- bus voltage measurement modules, 9- throttle tune
Save module.
Specific embodiment
In order to make those skilled in the art that the application may be better understood, with reference to the accompanying drawings and examples to this hair
Bright technical solution further illustrates.
As shown in Fig. 2, a kind of digital electricity generating system with simultaneously machine synchronizing function, including simultaneously machine controller can be passed through
2 and machine to busbar 1 on several generating sets, the busbar 1 by emergency power supply automatic change-over 11 connect load, work as city
When power outage occurs for electricity, emergency power supply automatic change-over 11 can be connected loads on busbar 1, and by busbar 1
Generating set be powered.
Each generating set includes sequentially connected rectification module 4, rectification module 4 and inverter power module 3, inverter
The output terminal of power module 3 is connected to and on machine controller 2, can control whether generating set accesses by simultaneously machine controller 2
Onto busbar 1.
In order to realize present invention purpose, each generating set is additionally provided with single-chip computer control system 6 and machine synchronizes mould
7 module of block 8 and accessory power supply, wherein simultaneously machine synchronization module 8 includes varying DC link voltage module 83, bus voltage measurement module
84th, SPWM control modules 82 and synchronous detection module 81, single-chip computer control system 6 are connected respectively by varying DC link voltage module 83
Rectification module 4 is connect, inverter power module 3 is connected by SPWM control modules 82.
The output terminal of inverter power module 3 connects single-chip computer control system 6, rectification module by synchronous detection module 81
4 output terminal connects single-chip computer control system 6, the output terminal connection accessory power supply of generator 5 by 1 voltage measurement module of busbar
7 modules, 7 module of accessory power supply are powered respectively to simultaneously machine synchronization module 8 and single-chip computer control system 6.
In order to make the distribution of the output power of generating set more reasonable, the application is also additionally arranged throttle adjustment module 9, throttle
The input terminal connection single-chip computer control system 6 of adjustment module 9, output terminal connection generator 5, and the power supply of throttle adjustment module 9
It is provided by 7 module of accessory power supply.It is capable of the output power of regulator generator 5 by throttle adjustment module 9, makes its control 75%
~85% at full capacity in the range of work.
The operation principle of the digital electricity generating system under brief description：When power outage occurs for alternating current, emergency power supply is certainly
Load is switched on busbar 1 by dynamic change-over switch 11, and in general, on busbar 1 should at least provide one group can be directly to negative
The generating set of power supply is carried, if the generating set that simultaneously machine controller 2 has been put by calculating the discovery of the bearing power on busbar 1
When being insufficient for load, it is necessary to put into new generating set, at this time just need to consider new generating set with having thrown
Whether meet between the generating set entered and machine condition, only meet voltage is equal, frequency is equal, phase is equal, phase sequence is consistent,
Equal five primary conditions of output characteristics can just carry out and machine, wherein phase sequence consistency can be protected by generator type selecting
Card, output characteristics can then be installed to ensure by correct wiring.
After new generating set input, do not power to the load immediately, but first by synchronous detection module 81（Such as
Shown in Fig. 3）The detection of voltage, frequency, phase, phase sequence is carried out to busbar 1, if phase sequence is inconsistent, more commutation can be passed through
With generator mark solve, network on the busbar 1 detected and phase parameter are then read in microcontroller control
System 6, and be compared with local frequency and phase, if it find that any parameter is unsatisfactory for and the condition of machine input, then pass through
SPWM control modules 82 are adjusted the difference on the frequency and phase difference of the machine, can be to load until meeting and after machine condition
Power supply, in power supply process, rectification module 4 is controlled by bus voltage measurement module 84 and varying DC link voltage module 83,
So that the output voltage grade of generator 5 meets the class requirement of network voltage.
The digital electricity generating system with simultaneously machine synchronizing function provided by the invention is described in detail above.Specifically
The explanation of embodiment is merely used to help understand the method and its core concept of the present invention.It should be pointed out that for the art
Those of ordinary skill for, without departing from the principle of the present invention, can also to the present invention carry out it is several improvement and repair
Decorations, these improvement and modification are also fallen within the protection scope of the claims of the present invention.
Claims (2)
1. with and machine synchronizing function digital electricity generating system, if including can by and machine controller and machine to busbar on
Dry generating set, the busbar are connected by emergency power supply automatic change-over and loaded, which is characterized in that each generating set packet
Sequentially connected generator, rectification module and inverter power module are included, the output terminal connection of the inverter power module is simultaneously
Machine controller further includes single-chip computer control system, auxiliary power module and simultaneously machine synchronization module, described and machine synchronization module includes
Varying DC link voltage module, bus voltage measurement module, SPWM control modules and synchronous detection module, the microcontroller control system
System connects rectification module by varying DC link voltage module respectively, and inverter power module, institute are connected by SPWM control modules
The output terminal for stating inverter power module connects single-chip computer control system, the output of the rectification module by synchronous detection module
End connects single-chip computer control system by bus voltage measurement module, and the output terminal of the generator connects auxiliary power module,
The auxiliary power module is powered respectively to simultaneously machine synchronization module and single-chip computer control system.
2. the digital electricity generating system according to claim 1 for having simultaneously machine synchronizing function, which is characterized in that further include throttle
Adjustment module, the input terminal connection single-chip computer control system of the throttle adjustment module, output terminal connection generator, and throttle tune
The power supply of section module is powered by auxiliary power module.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810157728.3A CN108199416A (en) | 2018-02-24 | 2018-02-24 | Digital electricity generating system with simultaneously machine synchronizing function |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810157728.3A CN108199416A (en) | 2018-02-24 | 2018-02-24 | Digital electricity generating system with simultaneously machine synchronizing function |
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| Publication Number | Publication Date |
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| CN108199416A true CN108199416A (en) | 2018-06-22 |
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ID=62593597
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| Application Number | Title | Priority Date | Filing Date |
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| CN201810157728.3A Pending CN108199416A (en) | 2018-02-24 | 2018-02-24 | Digital electricity generating system with simultaneously machine synchronizing function |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109980696A (en) * | 2019-04-04 | 2019-07-05 | 重庆吉力芸峰实业(集团)有限公司 | The method for controlling power balance of inverter controller parallel running for generating set |
| CN110401388A (en) * | 2019-08-27 | 2019-11-01 | 宝鸡中车时代工程机械有限公司 | Generating set parallel connection control system and rail engineering automobile |
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| CN103378607A (en) * | 2012-04-30 | 2013-10-30 | 冠军电力设备公司 | Parallel linkage for generators |
| CN207835082U (en) * | 2018-02-24 | 2018-09-07 | 李卫东 | Digital electricity generating system with simultaneously machine synchronizing function |
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Patent Citations (6)
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| CN102307036A (en) * | 2011-03-15 | 2012-01-04 | 隆鑫通用动力股份有限公司 | Control method and device for parallel running of internal combustion engine-driven generating sets |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109980696A (en) * | 2019-04-04 | 2019-07-05 | 重庆吉力芸峰实业(集团)有限公司 | The method for controlling power balance of inverter controller parallel running for generating set |
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