CN203312805U - Direct-current power generation system based on frequency-variable oil machine - Google Patents
Direct-current power generation system based on frequency-variable oil machine Download PDFInfo
- Publication number
- CN203312805U CN203312805U CN2013202870289U CN201320287028U CN203312805U CN 203312805 U CN203312805 U CN 203312805U CN 2013202870289 U CN2013202870289 U CN 2013202870289U CN 201320287028 U CN201320287028 U CN 201320287028U CN 203312805 U CN203312805 U CN 203312805U
- Authority
- CN
- China
- Prior art keywords
- oil machine
- frequency
- direct current
- output
- frequency conversion
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Images
Abstract
A direct-current power generation system based on a frequency-variable oil machine includes a storage battery, a direct current bus, a frequency-variable oil machine, an intermediate frequency direct current permanent magnet generator, a load detector and an oil machine frequency-variable controller, wherein the storage battery is connected to the direct current bus, the frequency-variable oil machine is mechanically connected to the intermediate frequency direct current permanent magnet generator, a direct current output end of the intermediate frequency direct current permanent magnet generator is connected to the direct current bus, an input end of the load detector is connected the direct current bus, an output end of the load detector is connected to an input end of the oil machine frequency-variable controller, and an output end of the oil machine frequency-variable controller is connected to a control end of the frequency-variable oil machine. The direct-current power generation system adjusts the rotation speed of the frequency-variable oil machine to adjust the output voltage of a generator so as to finally achieve an object of adjusting the charging current of the storage battery and the load current. As the oil machine is operated at a frequency-variable state, the oil machine rotates at a high speed with a heavy load and operates at a low speed with a light load, and thus the system efficiency can be raised greatly, the system fuel consumption rate is raised, the whole discharge is reduced, and an object of green environmental protection and energy conservation is achieved.
Description
Technical field
The utility model relates to technical field of power generation, is a kind of DC power generation system based on the frequency conversion oil machine specifically.
Background technology
Due to a lot of communication base station remotenesses, without commercial power supply, thereby generally adopt diesel-electric set electric supply.The whole world comprises that the Middle East, north African, Southeast Asia and western China have about 500,000 base stations to adopt diesel-electric set electric supply at present.These greatest problem that adopt the diesel generating set of conventional art are that energy consumption and discharge are higher, do not meet the world trends of modern energy conservation and emission reduction.
The conventional diesel generator unit structure as shown in Figure 1, after the fixed motor alternator of oil machine band frequently output AC voltage, is transformed to the charging of 48V DC-voltage supply pond and load use through AC/DC power rectification module.Through repeatedly conversion and the work of oil machine constant speed, electricity generation system efficiency is low, cost is high, and system reliability is low due to electric energy.
Recently there is again the excitation-type DC low-voltage generator of scheme utilization output 48V directly to charge and reach the effect that reduces system cost batteries, but this scheme is still used traditional excitation-type generator, needs excitation winding to produce excitation field by exciting current.And exciting current need consume extra exciting power, this has reduced the efficiency of generator, and its generating efficiency is generally lower than 85%.In addition because traditional low frequency excitation generator is operated in power frequency 50Hz, thereby the volume of generator, weight are larger.And in this scheme, system is frequently work surely, oil machine can't frequency control, thereby the system oil consumption is large, discharges high.
The utility model content
The purpose of this utility model is to provide a kind of DC power generation system based on the frequency conversion oil machine, and to solve in existing electricity generation system, oil machine can't variable frequency work and efficiency is low, oil consumption large, discharge is high problem.
Realize that the technical solution of the utility model is as follows: a kind of DC power generation system based on the frequency conversion oil machine, comprise storage battery and DC bus, storage battery is connected to DC bus, also comprises frequency conversion oil machine, intermediate frequency DC permanent magnetic generator, load sensor and oil machine frequency-variable controller; The frequency conversion oil machine is mechanically connected to the intermediate frequency DC permanent magnetic generator, the DC output end of intermediate frequency DC permanent magnetic generator is connected to DC bus, the input of load sensor is connected to DC bus, the output of load sensor is connected to the input of oil machine frequency-variable controller, and the output of oil machine frequency-variable controller is connected to the control end of frequency conversion oil machine.
The intermediate frequency DC permanent magnetic generator comprises intermediate frequency permanent magnet generator and three-phase chopper circuit; The three-phase chopper circuit comprises the chopper circuit of three brachium pontis and direct current output cathode, direct current output negative pole, the chopper circuit of each brachium pontis consists of an ac input end and the first thyristor, the second thyristor, the anodic bonding of the first thyristor is to ac input end, the negative electrode of the second thyristor is connected to ac input end, the negative electrode of the first thyristor is connected to described direct current output cathode, and the anodic bonding of the second thyristor is to described direct current output negative pole; Three live wires (A, B, C) of described intermediate frequency permanent magnet generator are connected respectively to the ac input end (a, b, c) of three-phase chopper circuit, and the direct current output cathode of described three-phase chopper circuit, direct current output negative pole form the DC output end of described intermediate frequency DC permanent magnetic generator.
The oil machine frequency-variable controller comprises analog input module, single-chip microcomputer, analog output module and motor speed controller, and analog input module and analog output module are connected respectively to described single-chip microcomputer; The input of analog input module forms the input of described oil machine frequency-variable controller, the output of analog output module is connected to the input of motor speed controller, and the output of motor speed controller forms the output of described oil machine frequency-variable controller.
In the technical program, the frequency conversion oil machine refers to petrol engine or the Diesel engine of variable speed at work.The rotating speed of frequency conversion oil machine and the pass of its frequency are: n=60f.In following formula, n be engine rotating speed (rev/min), 60 seconds per minute, f was engine frequency (hertz).
The mode of operation of electricity generation system is as follows:
1, frequency conversion oil machine drives the intermediate frequency direct accumulators group of DC permanent magnetic generator output dc voltage and load supplying.
2, when load increases, according to the load characteristic of generator, its output voltage will descend.After load sensor detects this voltage drop, feed back this load condition oil feeder frequency-variable controller, control the frequency conversion oil machine and improve rotating speed, increase input power, to improve generator output voltage, and provide larger charging current accumulators group.
3, when load reduces, based on identical principle, generator output voltage rises, load sensor feeds back this load condition oil feeder frequency-variable controller equally, control the frequency conversion oil machine and reduce rotating speed, reduce input power, reduce the direct current machine output voltage simultaneously, and reduce charging current.
4, frequency conversion oil machine is operated in minimum speed when zero load, full load works in maximum speed.
Native system carrys out the output voltage of regulator generator by the rotating speed of regulating the frequency conversion oil machine, and finally reaches the purpose of regulating battery charging electric current and load current.Because oil machine is operated in the frequency conversion state, i.e. high speed rotating during heavy duty, low cruise during underloading, therefore can greatly improve system effectiveness, improve the system fuel consumption, reduces whole discharge, reaches the purpose of environment protecting and power-saving.Native system adopts 48V direct current intermediate frequency permanent magnet generator, and this intermediate frequency permanent magnet generator adopts the permanent magnet excitation material, does not need excitation winding, does not need to consume extra exciting power; Permanent magnet generator does not need the parts such as shaft coupling, bearing, axle, has reduced wearing and tearing and loss.Thereby high 5% left and right of the more traditional excitation generator of permanent magnet generator engine efficiency of using in native system.Because generator is operated in intermediate frequency 400Hz left and right, more traditional 50Hz excitation electromotor frequency is high, thereby the generator volume is little, weight alleviates 30% left and right on year-on-year basis.Native system is used DC generator, cancelled the required AC/DC Switching Power Supply rectification module of traditional alternating current power-generating system, DC generator voltage is directly supplied with to battery pack and load, improve system effectiveness, reduce system cost, eliminated more comprehensively the high-frequency noise that former Switching Power Supply rectification module brings simultaneously.Native system can be widely used in communication base station, military generator group and mobile pharos etc., can significantly reduce fuel consume, exhaust emission and maintenance cost, possesses higher Social benefit and economic benefit.
The accompanying drawing explanation
Fig. 1 is the structural representation that the frequency generator group is determined in traditional interchange.
Fig. 2 is the structural representation of DC frequency-changing electricity generation system.
Fig. 3 is the electrical schematic diagram of intermediate frequency mag-dynamo.
Fig. 4 is the structural representation of oil machine frequency-variable controller.
Fig. 5 is the output voltage characteristic curve of DC generator under load variations.
Fig. 6 is the output voltage characteristic curve of DC generator under rotation speed change.
Embodiment
As shown in Figure 2, frequency conversion oil machine is by bearing or terminal pad and intermediate frequency mag-dynamo mechanical connection; Oil machine drives generator by mechanical force after rotating and rotates; Thereby oil machine is converted into fuel kinetic energy and reaches generator.Generator, according to Faradic electricity magnetic induction principle cutting magnetic line in rotation, produces electric current and voltage, and its function is electric energy for transforming kinetic energy.The outlet terminal of generator and the both positive and negative polarity of batteries are electrically connected, to battery charging.The input signal of oil machine frequency-variable controller is for meaning the voltage detection signal of load voltage and load current.Detecting the load current method is: at load end, add Hall element, Hall element can detect load current signal and induce the voltage signal of a transformation of scale, and this voltage signal feedback can be detected to the load current size; The load voltage size can be passed through the electric resistance partial pressure direct-detection.The output signal of oil machine frequency-variable controller is voltage signal, is connected with the Throttle Opening Control of frequency conversion oil machine, by changing the output voltage signal size, changes the throttle size of frequency conversion oil machine, how many with the amount of fuel that changes the frequency conversion oil machine, thereby changes the rotating speed of oil machine.
As Fig. 3, the intermediate frequency DC permanent magnetic generator comprises intermediate frequency permanent magnet generator and three-phase chopper circuit, but direct output of DC current is pressed.Usually the low-frequency voltage ripple that all contains 50Hz in DC generator, the voltage ripple of this low frequency needs the energy storage devices such as jumbo electric capacity, or after connect the DC/DC Switching Power Supply and can eliminate.And the generator of this programme is operated in intermediate frequency 400Hz, thereby can greatly reduce voltage ripple, reduce the use of filter capacitor.The three-phase chopper circuit is usually operated under the all-pass state, is equivalent to three-phase bridge rectification circuit, does not produce any switch noise; Work as load dump, generator output voltage rises and while surpassing stop voltage, the ON time of every phase is dwindled in chopper circuit work, therefore can reduce rapidly output voltage to rated value.Batteries has the inhibitory action natural to the intermediate frequency voltage ripple, eliminates this voltage of intermediate frequency ripple, the direct voltage of output smoothing.Pulsating voltage and electric current due to lead-acid batteries intermediate frequency when charging is of value to the battery charge efficiency and improves battery life simultaneously, and the combination of employing DC generator and storage battery is conducive to the work of system.
The oil machine frequency-variable controller as shown in Figure 4, its course of work is: after the signals such as the smog that the sensor signal input detected, water enchroachment (invasion), battery temperature, ambient temperature, ambient humidity, can with outer monitoring PC, communicate by letter with the feed back on-site state by RS485 bus or TCP/IP mouth.After the oil machine frequency-variable controller obtains load detection signal (generator voltage electric current, cell voltage current signal etc.) by load sensor, this detection signal input single-chip microcomputer is processed.Single-chip microcomputer is the power curve of load detection signal to ratio engine thus, calculates the rotating speed that engine should move, and exports this tach signal to motor speed controller, regulates engine speed for it.For example: suppose frequency conversion oil machine rated output power 6KW when rotating speed is 1500rpm, rated output power 12KW under 3000rpm.For the DC load of 48V, when load current was 100A, bearing power was 4.8KW, and supposing the system efficiency is 80%, needs the input power of 4.8KW/80%=6KW; When same load current was 200A, bearing power was 9.6KW, and supposing the system efficiency is 80%, needs the input power of 9.6KW/80%=12KW.When single-chip microcomputer detects load current, be 100A(48V) time, by calculating, find that now the power output of engine is at least 6KW, the corresponding rotating speed of oil machine is 1500rpm, and just exporting relevant voltage signal notice oil machine frequency-variable controller is 1500rpm by the oil machine adjustment of rotational speed.Same increase to 200A(48V when load current) time single-chip microcomputer to calculate now required engine speed be 3000rpm, therefore output relevant voltage signal is notified the oil machine frequency-variable controller, be 3000rpm by the oil machine adjustment of rotational speed.Wherein, motor speed controller selects Shanghai to permit an automatically controlled ESC9800 rotational speed governor.For guaranteeing necessary fuel-economizing, energy-saving effect, it is 20% to the slewing range that is fully loaded with rotating speed that engine no-load speed can be set, as shown in Figure 5; For this frequency conversion scope of coupling, by the optimal design to generator and choose reasonable permanent magnetism magnetic material, generator being set unloaded is also 20% left and right to fully loaded voltage drop, as shown in Figure 6 simultaneously.
Claims (6)
1. the DC power generation system based on the frequency conversion oil machine, comprise storage battery and DC bus, and storage battery is connected to DC bus, it is characterized in that, also comprises frequency conversion oil machine, intermediate frequency DC permanent magnetic generator, load sensor and oil machine frequency-variable controller; The frequency conversion oil machine is mechanically connected to the intermediate frequency DC permanent magnetic generator, the DC output end of intermediate frequency DC permanent magnetic generator is connected to DC bus, the input of load sensor is connected to DC bus, the output of load sensor is connected to the input of oil machine frequency-variable controller, and the output of oil machine frequency-variable controller is connected to the control end of frequency conversion oil machine.
2. the DC power generation system based on the frequency conversion oil machine according to claim 1, is characterized in that, described intermediate frequency DC permanent magnetic generator comprises intermediate frequency permanent magnet generator and three-phase chopper circuit; The three-phase chopper circuit comprises the chopper circuit of three brachium pontis and direct current output cathode, direct current output negative pole, the chopper circuit of each brachium pontis consists of an ac input end and the first thyristor, the second thyristor, the anodic bonding of the first thyristor is to ac input end, the negative electrode of the second thyristor is connected to ac input end, the negative electrode of the first thyristor is connected to described direct current output cathode, and the anodic bonding of the second thyristor is to described direct current output negative pole; Three live wires (A, B, C) of described intermediate frequency permanent magnet generator are connected respectively to the ac input end (a, b, c) of three-phase chopper circuit, and the direct current output cathode of described three-phase chopper circuit, direct current output negative pole form the DC output end of described intermediate frequency DC permanent magnetic generator.
3. the DC power generation system based on the frequency conversion oil machine according to claim 1, it is characterized in that, described oil machine frequency-variable controller comprises analog input module, single-chip microcomputer, analog output module and motor speed controller, and analog input module and analog output module are connected respectively to described single-chip microcomputer; The input of analog input module forms the input of described oil machine frequency-variable controller, the output of analog output module is connected to the input of motor speed controller, and the output of motor speed controller forms the output of described oil machine frequency-variable controller.
4. the DC power generation system based on the frequency conversion oil machine according to claim 3, is characterized in that, the model of described motor speed controller is ESC9800.
5. according to described any one DC power generation system based on the frequency conversion oil machine of claim 1 to 4, it is characterized in that, described frequency conversion oil machine is the frequency conversion petrol engine.
6. according to described any one DC power generation system based on the frequency conversion oil machine of claim 1 to 4, it is characterized in that, described frequency conversion oil machine is the frequency conversion Diesel engine.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013202870289U CN203312805U (en) | 2013-05-23 | 2013-05-23 | Direct-current power generation system based on frequency-variable oil machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013202870289U CN203312805U (en) | 2013-05-23 | 2013-05-23 | Direct-current power generation system based on frequency-variable oil machine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203312805U true CN203312805U (en) | 2013-11-27 |
Family
ID=49618980
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2013202870289U Expired - Fee Related CN203312805U (en) | 2013-05-23 | 2013-05-23 | Direct-current power generation system based on frequency-variable oil machine |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203312805U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103311918A (en) * | 2013-05-23 | 2013-09-18 | 成都乾威科技有限公司 | Variable frequency oil engine-based direct current (DC) power generation system |
| CN103997118A (en) * | 2014-05-23 | 2014-08-20 | 广州市乾威能源技术有限公司 | Man-portable hybrid energy power supply module |
| US11242044B2 (en) | 2018-07-18 | 2022-02-08 | Kohler Co. | Motor generator control for fixed fuel source engine |
| US11264918B2 (en) | 2017-12-14 | 2022-03-01 | Kohler Co. | Isolated inverters |
-
2013
- 2013-05-23 CN CN2013202870289U patent/CN203312805U/en not_active Expired - Fee Related
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103311918A (en) * | 2013-05-23 | 2013-09-18 | 成都乾威科技有限公司 | Variable frequency oil engine-based direct current (DC) power generation system |
| CN103997118A (en) * | 2014-05-23 | 2014-08-20 | 广州市乾威能源技术有限公司 | Man-portable hybrid energy power supply module |
| CN103997118B (en) * | 2014-05-23 | 2016-01-20 | 广州市乾威能源技术有限公司 | The energy mix supply module that individual soldier carries |
| US11264918B2 (en) | 2017-12-14 | 2022-03-01 | Kohler Co. | Isolated inverters |
| US11923787B2 (en) | 2017-12-14 | 2024-03-05 | Kohler Co. | Isolated inverters |
| US11242044B2 (en) | 2018-07-18 | 2022-02-08 | Kohler Co. | Motor generator control for fixed fuel source engine |
| US11667273B2 (en) | 2018-07-18 | 2023-06-06 | Kohler Co. | Motor generator control for fixed fuel source engine |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103311918A (en) | Variable frequency oil engine-based direct current (DC) power generation system | |
| CN202889279U (en) | Brushless doubly fed motor excitation control device | |
| WO2010108342A1 (en) | Excitation control system for marine diesel brushless doubly fed shaft generator and control method thereof | |
| CN102868346A (en) | Brushless doubly-fed motor excitation control system and control method using same | |
| CN112886718B (en) | Resonance compensation type current transformer induction power taking system | |
| CN203312805U (en) | Direct-current power generation system based on frequency-variable oil machine | |
| CN104467583B (en) | Permanent DC bus-bar voltage permanent magnet generator unit based on prime mover speed governing | |
| CN101604865B (en) | Wind power generation system for low-voltage DC power supply | |
| CN211377693U (en) | Power transmission line hybrid power supply based on solar energy and induction energy obtaining | |
| CN103683435B (en) | The voltage stabilization and frequency stabilization UPS of portable power supply and intelligent charge integral method | |
| CN203057040U (en) | Discrete frequency-conversion soft starting device with no speed sensor | |
| CN204068408U (en) | Be applied to the novel power taking supply unit of cable work well array water | |
| CN104539023B (en) | Wind power generation and power supply system based on grid power complementation | |
| CN201570894U (en) | Small-sized emergency power supply | |
| CN203707864U (en) | Novel hybrid-energy 48V direct-current frequency-conversion power generation system | |
| CN103956948A (en) | Intelligent alternating-current speed change diesel generating set | |
| CN201440646U (en) | Excitation control system structure for marine brushless doubly-fed shaft generator of diesel engine | |
| CN204089334U (en) | From net type micro-capacitance sensor automatic switching control circuit | |
| CN204597597U (en) | A kind of domestic solar electric power system | |
| CN204391850U (en) | Portable movable maintenance power supply | |
| CN200944574Y (en) | Rectifying regulator for motorcycle | |
| CN102780258B (en) | The vehicle-mounted formula magneto smart charge control system of electric automobile | |
| CN102709999B (en) | Energy-saving charger | |
| CN107968606A (en) | A kind of diesel-driven generator electricity generation system and control method based on brushless dual-feed motor | |
| CN204928326U (en) | Battery becomes electricity charging device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20131127 Termination date: 20190523 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |