CN102624053A - Uninterrupted power system capable of continuously supplying power - Google Patents
Uninterrupted power system capable of continuously supplying power Download PDFInfo
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- CN102624053A CN102624053A CN2012100781789A CN201210078178A CN102624053A CN 102624053 A CN102624053 A CN 102624053A CN 2012100781789 A CN2012100781789 A CN 2012100781789A CN 201210078178 A CN201210078178 A CN 201210078178A CN 102624053 A CN102624053 A CN 102624053A
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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
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B70/00—Technologies for an efficient end-user side electric power management and consumption
- Y02B70/30—Systems integrating technologies related to power network operation and communication or information technologies for improving the carbon footprint of the management of residential or tertiary loads, i.e. smart grids as climate change mitigation technology in the buildings sector, including also the last stages of power distribution and the control, monitoring or operating management systems at local level
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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
- Y04—INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
- Y04S—SYSTEMS INTEGRATING TECHNOLOGIES RELATED TO POWER NETWORK OPERATION, COMMUNICATION OR INFORMATION TECHNOLOGIES FOR IMPROVING THE ELECTRICAL POWER GENERATION, TRANSMISSION, DISTRIBUTION, MANAGEMENT OR USAGE, i.e. SMART GRIDS
- Y04S20/00—Management or operation of end-user stationary applications or the last stages of power distribution; Controlling, monitoring or operating thereof
- Y04S20/20—End-user application control systems
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Abstract
The invention discloses an uninterrupted power system (UPS) capable of continuously supplying power, which comprises a power generator set unit, a UPS unit, a selection switch (8) and a control unit (9), wherein the power generator set and the UPS unit form a standby loop which is respectively connected with loads through the selection switch (8), when a mains supply loop (11) is abnormal, the control unit (9) controls the selection switch (8) to be switched into the mains supply loop (11) for providing standby power to the loads, thus uninterrupted power supply is realized. According to the invention, under the condition of main supply failure, the UPS can be switched to a standby power generator for supplying power, so that the uninterrupted power supply for residual families is realized; and meanwhile, a duration-free sustainable energy-saving environmental-friendly power supply mode is met.
Description
Technical field
The invention belongs to the uninterrupted power supply field, be specifically related to a kind of uninterruptible power system of sustainable power supply, be specially adapted to outlying outskirts of a town scattered residential block electricity consumption (like the villa power supply).
Background technology
Along with the development of society, social life more and more be unable to do without electric power.But one to the peak of power consumption in summer, and power cuts to limit consumption is all the fashion.Simultaneously, be that the energy-saving and emission-reduction of characteristic also often sweep over the country with the power cuts to limit consumption.In addition, influenced by uncertain factors such as natural calamity extreme weather, also can make electrical network accident power-off occur.Have a power failure, brought very big inconvenience to resident living suddenly.
In order to address the above problem, basic at present UPS (Uninterruptible Power Supply the is a uninterrupted power supply) scheme that adopts.Existing UPS technology becomes civil power into direct current through over commutation during operate as normal, and is parallelly connected with battery tension, again through inversion output stable AC electricity powering load.When municipal power failure, by storage battery process inversion powering load.When inner certain module of UPS device broke down, civil power was directly through the bypass powering load.But present UPS uninterrupted power supply is because the limited often power-on time of battery capacity is shorter, and the power supply duty ratio that can support is less, can't be under the long-time powering-off state of civil power continuous firing.Then must increase the capacity of batteries if realize the power of long-time power supply of UPS or increase power supply unit.Increase if power-on time is how much multiples, equipment investment also can become how much multiples to increase, and it is limited that power-on time but remains.Along with the operation of equipment, the reduction of cell voltage, the very difficult stability that guarantees the uninterrupted power supply output voltage.And storage battery is in under-voltage condition for a long time, causes battery damage serious, shortens its life-span, needs periodic replacement, causes huge operation investment burden.In addition, this technical scheme exists also that power supplying efficiency is low, volume is big, Heavy Weight, many defectives such as difficult in maintenance.Other has some users oneself to be equipped with stand-by generator, the long-time powerup issue after the solution municipal power failure.But stand-by generator can not start when the civil power sudden power immediately.Outage still can bring influence to some important power consumption equipments interim.
At present existing numerous domestic and international experts, scholar and user explore uninterrupted generator powered technology; Like patent documentation CN102111004 a kind of uninterrupted non-firm power system has been proposed; It adopts diesel engine or gasoline engine generating set and uninterrupted power supply(ups) associated working, realizes uninterrupted power supply.No matter civil power normally whether, electric current in the UPS storage battery is all used in load, external power source is always the floating charge of storage battery trickle, storage battery plants is in the state of activation all the time.The starter-generator group is a charge in batteries when city's electrical anomaly battery tension is reduced to protection voltage.But this scheme needs the very big batteries of configuration capacity, and cost is higher, and the life-span is shorter, not easy care.And the diesel engine volume is big, starts slowly, and running noises is big, and gasoline engine has improvement than diesel engine aspect above-mentioned, but gasoline still be the diesel generation cost all than higher, generating efficiency is not high.This scheme needs long-term deposit great amount of fuel oil simultaneously, constitutes potential safety hazard.More core problem is that uninterruptible power system is installed near the residential area basically, when gasoline engine or diesel engine work long hours, can produce topmost atmosphere pollutions such as large quantity of exhaust gas and PM2.5 (diameter is less than or equal to 2.5 micron particles things) suspended particulate.Above-mentioned pollutant meeting severe contamination living area ambient air is to the huge negative effect that brings of health and atmosphere quality.
Summary of the invention
In order to overcome above-mentioned deficiency; The object of the present invention is to provide a kind of energy saving and environment friendly uninterruptible power system of sustainable power supply; It can switch to the stand-by generator power supply through UPS and realize resident family uninterrupted power supply purpose under the civil power powering-off state, satisfy the powering mode of no limit energy-conserving and environment-protective sustainably simultaneously.
For the technical scheme that solves the problems of the technologies described above the present invention's employing is:
A kind of sustainable power supply energy-saving environment-friendly type uninterruptible power system comprises unit starting device, gas fuel dual fuel engine, small generator, rectification module, inversion module, charge-discharge modules, control module, batteries and selector switch.
Unit starting device, gas fuel dual fuel engine, small generator constitute the generating set unit; Rectification module, inversion module, charge-discharge modules constitute; Generating set unit and UPS unit are electrically connected, and constitute back-up circuit together, to provide stand-by power supply to load.
Stand-by power supply loop and civil power loop are connected to load through selector switch.Generator output electric energy becomes direct current through rectification module, is transformed into alternating current through inversion module again, powers to the load behind the connection selector switch.Batteries is connected to after the rectification module through charge-discharge modules, and control module is connected to unit starting device, selector switch and charge-discharge modules respectively.The throwing that control module is controlled the UPS batteries through monitoring line electric current and voltage situation is moved back, the start and stop of stand-by generator group, and corresponding control selector switch switches different powering modes.The control module voltage condition of on-line monitoring batteries also guarantees that storage battery is in normal standby status in addition, is battery charging in case brownout will start charge function.Battery charging can adopt two kinds of patterns of alternating current-direct current, can under various operating modes, all can in time charge to guarantee battery pack.
These sustainable power supply energy-saving environment-friendly type uninterruptible power system generating set power set are the gas fuel dual fuel engine.Gaseous fuels such as natural gas/biogas with more environmental protection are main, also can lay in small quantities of gasoline fuel in support.Its air feed or fuel feeding interface are connected to the unit starting device, and coordinating under the control in control module is automatic air feed of engine or fuel feeding.
The present invention adopts the beneficial effect after the above technical scheme to be:
One, with natural gas/biogas etc. more the novel energy of energy-conserving and environment-protective be fuel; Compare with the conventional gasoline diesel fuel; Gaseous fuel is granular material discharged almost nil; The discharging of CO gas, oxynitrides gas and hydrocarbon gas also significantly reduces, so gaseous fuels such as natural gas/biogas have very big advantage aspect the air quality improving.Gaseous propellant engine efficient is higher simultaneously, and fuel cost obviously descends, and is about about 1/3 of gasoline.Use biogas fuel more to embody the requirements of the times of energy-conserving and environment-protective.
Two, continue supply gas fuel through city gas pipeline or rural biogas tank pressure and can ensure that this system does not have the limit continuous operation.Reserve the Fuel Petroleum interface, fuel in support can further improve the flexibility and the reliability of this system.
Three, civil power just often, civil power directly powers to the load through selector switch, without the two conversion of rectification module and inversion module, improves the UPS module life.Control module monitoring commercial power condition guarantees that UPS is in the best alternate state.During municipal power failure, the UPS module only is operated in generating set 10 seconds left and right sides time between the starting period, even adopt redundancy scheme to select the battery capacity of holding load work 20-30 time second, required battery capacity is also less, reduces cost.The equipment integral advantages of small volume is convenient to Operation and Maintenance.Under the ups system transition, realize zero switching uninterrupted power supply.
Description of drawings
Fig. 1 is a theory structure block diagram of the present invention.
Fig. 2 is the generating set system.
Fig. 3 is a ups system.
The accompanying drawing identifier declaration:
1. unit starting device
2. dual fuel engine
3. small generator
4. rectification module
5. inversion module
6. charge-discharge modules
7. storage battery
8. selector switch
9. control module
10. dc bus
11. line
Explain: thicker solid line partly is a supply lines among the figure, and thinner dotted portion is the secondary control line.
Embodiment
Below in conjunction with accompanying drawing and specific embodiment to further explain of the present invention.
See also shown in Figure 1; It comprises unit starting device 1, gas fuel dual fuel engine 2, small generator 3, rectification module 4, inversion module 5, charge-discharge modules 6, batteries 7, selector switch 8 and control module 9 for the theory structure sketch map of the present invention's sustainable power supply energy-saving environment-friendly type uninterruptible power system preferred embodiment.
See also shown in Figure 2; Unit starting device 1, dual fuel engine 2,3 three modules of small generator constitute the generating set unit, under the civil power abnormal conditions, start dual fuel engine 2 through unit starting device 1; Drive small generator 3 work, produce the stand-by power supply of no limit.
See also shown in Figure 3; Four modules such as rectification module 4, inversion module 5, charge-discharge modules 6, storage battery 7 are the UPS unit; The electric power that small generator 3 produces outputs to rectification module 4; Rectification module 4 is connected through dc bus 10 with inversion module 5, and this inversion module 5 is connected to selector switch 8, and 6 of charge-discharge modules are connected with batteries 7, dc bus 10 and civil power loop 11 respectively.
Generating set unit and UPS unit connect and compose back-up circuit.Back-up circuit is connected with load through selector switch 8 with civil power loop 11.
Above-mentioned sustainable power supply energy-saving environment-friendly type uninterruptible power system mode of operation is:
Civil power just often, civil power powers to the load through selector switch 8 through civil power loop 10.Storage battery 7 connects line 10 through charge-discharge modules 6.Control module 9 is through the working condition of charge-discharge modules 6 monitoring lines 10 and batteries 7.When storage battery 7 voltages reduced, control module 9 was opened charge function, through 7 chargings of line 10 accumulators, guaranteed that ups system is in normal standby status all the time.When control module 9 detects line 10 when unusual, control module 9 is switching selection switch 8 and drop into ups system immediately, and this process can be accomplished in 10 milliseconds, and the while, control module 9 was through unit starting device 1 starter-generator group system.After ups system drops into, by storage battery process inversion module 5 powering loads, wait for generating set system start-up immediately.The generating set system starting process needs about 10 seconds.After generating set system start-up finishes, power to the load through selector switch 8 through rectification module 4, inversion module 5.Behind the two conversion processes of the above-mentioned commutation inversion of generator output electric energy process, improved the stability of the quality of power supply greatly.After the generating set system operate as normal; Control module 9 withdraws from storage battery 7 from powering mode; Storage battery 7 discharges electric energy stored through the course of work of front; Voltage reduces, and control module 6 is charged through charge-discharge modules 6 accumulators 7 through dc bus 9 after detecting this information, guarantees that ups system is in normal standby status all the time.
The Fuel Petroleum mode of operation further improves system flexibility and reliability as state of emergency alternative scheme.In the generating set system starting process, when the gaseous fuel supply was out of order, the generating set system failed normal startup meeting and immediately unit starting device 1 is switched to the Fuel Petroleum mode of operation after control module 9 detected 10 seconds.Around here always by the ups system powering load.But so only need select the storage battery 7 of holding load work 20-30 capacity second promptly to satisfy system requirements according to the load size.
One, the generating set system adopts gaseous fuel and Fuel Petroleum dual fuel engine in the sustainable power supply energy-saving environment-friendly type of the present invention uninterruptible power system, is main with gas-powered pattern, realizes the sustainable uninterrupted power supply target of length in unlimited time.
Two, the generating set system can adapt to multiple gases fuel in the sustainable power supply energy-saving environment-friendly type of the present invention uninterruptible power system, and fuel-flexible is various.And can improve the gas fuel availability according to concrete gas componant adjustment fuel control strategy, and whole efficiency is high, and cost of electricity-generating is low, and not only economy but also energy-conserving and environment-protective have good economic benefit and environmental benefit.
Three, the sustainable power supply energy-saving environment-friendly type of the present invention uninterruptible power system just often directly through the selector switch powering load, without ups system rectification module and inversion module, has improved the life-span of ups system at civil power.Have only under the situation of city's electrical anomaly, just switch to the ups system power supply, the transition before starting fully as the generating set system.Can select the batteries of less capacity can satisfy system requirements.Whole ups system cost is low, volume is little, the life-span is long, easy to maintenance, use simple.After adopting this technology, can realize that under the municipal power failure situation zero switches, realize uninterrupted power supply.
Four, control module adopts embedded design in the sustainable power supply energy-saving environment-friendly type of the present invention uninterruptible power system; Monitoring civil power and ups system battery condition; And according to actual conditions adjustment selector switch; Start corresponding powering mode, accumulators group charging in time guarantees that ups system is in normal standby status simultaneously.
Claims (8)
1. the uninterruptible power system of a sustainable power supply; Comprise generating set unit, UPS unit, selector switch (8) and control unit (9); Wherein, said cluster engine unit and UPS unit constitute back-up circuit, and this back-up circuit and civil power loop (11) are electrically connected with load respectively through selector switch (8); In said civil power loop (11) when unusual; Said control unit (9) control selector switch (8) switches to back-up circuit with supply line from civil power loop (11), to provide stand-by power supply to said load, realizes uninterrupted power supply.
2. uninterruptible power system according to claim 1; It is characterized in that said stand-by power supply comprises second stand-by power supply that first stand-by power supply that the cluster engine unit provides and the storage battery (7) in the UPS unit provide, in said civil power loop (11) when unusual; Said control unit (9) the said storage battery of control (7) discharge earlier; To provide second stand-by power supply, control the cluster engine unit starting again and produce first stand-by power supply, to replace said second stand-by power supply to load.
3. uninterruptible power system according to claim 1 and 2 is characterized in that, described UPS unit comprises:
Rectification module (4), it is electrically connected with the generating set unit, and the power-supply rectifying that is used for the generating set unit is a direct current;
Inversion module (5); It is electrically connected through dc bus (10) with rectification module (4); Direct current after the rectification is an alternating current through this inversion module (5) inversion, and is transferred to the selector switch (8) that is electrically connected with it, as first stand-by power supply to offer said load;
Charge-discharge modules (6); It is electrically connected with batteries (7), dc bus (10) and civil power loop (11) respectively; Said batteries (7) discharges and recharges through this charge-discharge modules (6), wherein, and during discharge; The direct current that batteries (7) provides is transferred to selector switch (8) behind this dc bus (10) and inversion module (5), as second stand-by power supply to offer said load; During charging, the electric current on dc bus (10) or civil power loop (11) charges to said batteries (7) behind this charge-discharge modules (6).
4. according to the described uninterruptible power system of one of claim 1-3, it is characterized in that said first stand-by power supply can provide the continued power of no limit.
5. according to the described uninterruptible power system of one of claim 1-4; It is characterized in that said generating set unit comprises unit starting device (1), engine (2) and generator (3), said generator is electrically connected with said rectification module (4); Said unit starting device (1) is used for ato unit (2); To drive generator (3) work, produce power supply and output to rectification module (4), to be used to provide said first stand-by power supply.
6. uninterruptible power system according to claim 5 is characterized in that, said engine (2) is a dual fuel engine, and fuel can be gaseous fuel or Fuel Petroleum.
7. according to the described uninterruptible power system of one of claim 1-6; It is characterized in that; Said control module (9) is electrically connected with selector switch (8), charge-discharge modules (6) and unit starting device (1) respectively; It selects civil power loop or back-up circuit to the startup of the power supply of load, control unit starting drive (1) or close according to the change in voltage on civil power loop (11) to control selector switch (8) respectively, and control charge-discharge modules (6) discharges and recharges storage battery.
8. according to the described uninterruptible power system of one of claim 1-7, it is characterized in that recover just often in said civil power loop (11), said control unit (9) control selector switch (8) switches to civil power loop (11) with supply line from back-up circuit.
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| CN201210078178.9A CN102624053B (en) | 2012-03-22 | 2012-03-22 | Uninterrupted power system capable of continuously supplying power |
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| CN201210078178.9A CN102624053B (en) | 2012-03-22 | 2012-03-22 | Uninterrupted power system capable of continuously supplying power |
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| CN104898066A (en) * | 2015-06-08 | 2015-09-09 | 北京宏光星宇科技发展有限公司 | On-line testing instrument of storage battery |
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