CN102386636A - Off-grid power generation system adopting hybrid novel energy and control method thereof - Google Patents
Off-grid power generation system adopting hybrid novel energy and control method thereof Download PDFInfo
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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
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Abstract
The invention relates to an off-grid power generation system adopting hybrid novel energy and a control method thereof. The off-grid power generation system comprises novel energy, traditional energy, a storage battery and a load; and the voltage values of the control systems of various forms of energy are set according to required priority levels, and the voltage which is set according to the top priority level is the highest. According to the invention, the novel energy is controlled to be utilized first by setting the floating charging and uniform charging voltage values in the off-grid power generation system. The off-grid power generation system adopting hybrid novel energy and the control method thereof can make the novel energy supply power to the load first and prolong the service life of the storage battery.
Description
Technical field
The present invention relates to adopt mix and net electricity generation system and control method thereof leaving of new forms of energy.
Background technology
Civil power is our said alternating current (AC), and the composition of alternating current comprises: three kinds of voltages, electric current, frequency, and its frequency can be divided into 50HZ (hertz) and two kinds of 60HZ (hertz), and voltage distributes by 100VA to 240VA.Be generally 220V (volt).
Traditional energy is meant that under present stage scientific and technological level condition people are widely used, the energy of technical comparative maturity, like coal, oil, natural gas, water ability, timber etc.Traditional energy is also claimed conventional energy resource.Coal in the traditional energy, oil and natural gas all are that the biological fossil by time immemorial develops and forms, so be referred to as fossil fuel.
New forms of energy (new energy sources) are meant the various energy forms outside the traditional energy.Its various forms mostly is to come from the heat energy (tidal energy exception) that the sun or earth interior depths are produced directly or indirectly.Solar energy, wind energy, biomass energy, geothermal energy, water ability and oceanic energy and the energy that bio-fuel and hydrogen produced of deriving have out been comprised by regenerative resource.That is, new forms of energy comprise various regenerative resources and nuclear energy.With respect to traditional energy, new forms of energy generally have pollution less, characteristics that reserves are big, world today's serious environmental pollution problem and the exhausted problem of resource (particularly fossil energy) are significant for solving.
Along with constantly bringing forth new ideas of new energy technology, increasing new forms of energy use with the mixing that combines of traditional energy, to reduce and alternative traditional energy, particularly fossil energy, are the development trends of present countries in the world.
Be meant from net generating (off-grid power generation) and adopt net powering mode leaving that the independent generating in zone, branchs family independently generate electricity.Type from the net generating comprises: wind power generation, photovoltaic generation, wind light mutual complementing, the complementation of honourable bavin, the complementation of water light, the complementation of water wind, the complementation of light bavin, diesel generation, natural gas power, little water power etc.
Range of application and purposes from the net generating comprise household electricities such as the illumination of outlying areas without electricity resident living power utility, TV, washing machine; The deep well of photovoltaic water pump, areas without electricity is drunk, is irrigated; Field of traffic lights navigation light, traffic/railway signal lamp, traffic alarm/identification light, street lamp; With automobile accessories solar telephone/electric motor car, battery charging equipment, air conditioning for automobiles, ventilation fan, refrigerator etc.; Space flight instrument satellite, spacecraft, space solar power station etc.; Communication/communications field solar energy unattended operation microwave relay station, optical cable maintenance station, broadcasting/communication/paging power-supply system; Oil, ocean, meteorological field petroleum pipeline and reservoir strobe cathodic protection solar power supply system, oil drilling platform life and emergency power supply, ocean checkout equipment, meteorology/hydrological observation equipment etc.; Portable electronics, sea water desalting equipment power supply etc.
Traditional wind power generation and solar power generation have the defective of himself in the utilization of resources, some area hours of daylight is short or wind-force is not enough, uses wind power generation or solar power generation can not satisfy the needs of power supply separately.But the complementarity of wind energy and solar energy is very strong, possibly have the sun when calm, and the no solar time possibly have wind, and possibility wind was little when sunshine on daytime was sufficient, and possibility wind was not big when had sunshine night.Wind-photovoltaic complementary power supply system utilizes this principle combination among the strong ones, mutual supplement with each other's advantages just.This system has remedied the defective of wind-powered electricity generation and photoelectricity autonomous system, and it is rational independent electric power supply, is the perfect adaptation of new forms of energy comprehensive exploitation and utilization.
Wind light mutual complementing has solved the difficult problem that remote districts can't supply power from the net electric power system, has solved traditional this high difficult problem of power supply line loss great achievement.Not only alleviate the power tense situation, also realized green energy resource simultaneously, developed the renewable energy resources, promoted the development of recycling economy.
Leave in the use of netting generating being blended in of new forms of energy and traditional energy at present; Be example for example with wind energy, solar energy; The energy mix system that forms with wind-driven generator and solar generator is the control through blower fan, solar energy mixture control, to the storage battery accumulation of energy, is about to the frequency conversion that generator sends, the AC rectification of transformation becomes direct current; With this direct current to the storage battery accumulation of energy, thereby to load power of alterating and direct current is provided regularly.In above-mentioned hybrid system, floating charge, the even charging voltage of the floating charge of storage battery, even charging voltage and blower fan, solar energy and external power source all equate.
As shown in Figure 1; Blower fan, solar energy and external power source to storage battery power supply, storage battery satisfies the needs of actual loading through frequent charge and discharge, and the cycle-index of the complete charge and discharge of lead acid accumulator is greatly about 400 times; Every day the cycle-index higher system, the life-span of storage battery is very short.Because the charging and discharging of accumulator characteristic, requiring the control charging current usually is between the 5%-30% of battery capacity, also is 0.05C-0.3C (C is a battery capacity); Therefore battery capacity not only will satisfy the requirement of load; Also will satisfy the requirement of blower fan, solar cell power output plate, therefore mix on the range of application of using at above-mentioned new forms of energy and energy mix, be that certain condition restriction is arranged to load; For example; Can not be too big for the general power of the load of selecting for use, the excessive load of power will be used the great storage battery of capacity, and therefore at present actual load of selecting for use is about about 1 kilowatt or less than 1 kilowatt.
Summary of the invention
The present invention is through setting floating charge in the net electricity generation system, even charging voltage point value, and the control new forms of energy are utilized by preferential, and prolong the life-span of storage battery.
Concrete technical scheme is:
A kind of mixing netted electricity generation system leaving of new forms of energy, comprises new forms of energy X1, X2, X3 ... Xn (wherein n ≧ 1); Traditional energy C1, C2, C3 ... Cn (wherein n ≧ 1); Storage battery and load; The controller of each new forms of energy and traditional energy bus respectively is connected, and storage battery and load are connected respectively to bus.
A kind of control method from the net electricity generation system of mixing new forms of energy comprises new forms of energy X1, X2, X3 ... Xn (wherein n ≧ 1); Traditional energy C1, C2, C3 ... Cn (wherein n ≧ 1); Storage battery and load; Wherein the float charge voltage point value of storage battery is that UA, even charging voltage point value are UB, traditional energy C1, C2, C3 ... The float charge voltage point value of Cn (wherein n ≧ 1) is UAC1, UAC2, UAC3 ... UACn (wherein n ≧ 1); Traditional energy C1, C2, C3 ... The even charging voltage point value of Cn (wherein n ≧ 1) is UBC1, UBC2, UBC3 ... UBCn (wherein n ≧ 1); New forms of energy X1, X2, X3 ... The float charge voltage point value of Xn (wherein n ≧ 1) is UAX1, UAX2, UAX3 ... UAXn (wherein n ≧ 1); New forms of energy X1, X2, X3 ... The even charging voltage point value of Xn (wherein n ≧ 1) is UBX1, UBX2, UBX3 ... UBXn (wherein n ≧ 1);
Wherein, UAX1 ﹥ UAX2 ﹥ UAX3 ﹥ ... ﹥ UAXn ﹥ UAC1 ﹥ UAC2 ﹥ UAC3 ﹥ ... ﹥ UACn ≧ UA (wherein n ≧ 1); UBX1 ﹥ UBX2 ﹥ UBX3 ﹥ ... ﹥ UBXn ﹥ UBC1 ﹥ UBC2 ﹥ UBC3 ﹥ ... ﹥ UBCn ≧ UB (wherein n ≧ 1).The magnitude of voltage of the control system of the above-mentioned all kinds of form energy is set according to required priority level, and the voltage of override level setting is the highest.
Above-mentioned new forms of energy be solar energy, wind energy, biomass energy, geothermal energy, water can and one or more of the oceanic energy and the energy that bio-fuel and hydrogen produced of deriving out by regenerative resource.
Above-mentioned traditional energy is like one or more of coal, oil, natural gas, timber.
Beneficial effect of the present invention:
The present invention is through setting floating charge in the net electricity generation system, even charging voltage point value, and the control new forms of energy are utilized by preferential.Adopt net electricity generation system and control method thereof leaving of mixing new forms of energy of the present invention, new forms of energy are preferentially powered to the load, and prolong the life-span of storage battery.
Description of drawings
The existing mixing of Fig. 1 netted electricity generation system leaving of new forms of energy.
Electricity generation system is netted in leaving of Fig. 2 the present invention mixing new forms of energy.
Embodiment
Embodiment 1
Like Fig. 1 be traditional wind, light, civil power complementary road lamp existing mixing new forms of energy from the net electricity generation system.Street lamp is 50 watts of LED lamp holders; The longest day lighting time 12 hours, storage battery is 2 groups 12 volts 100 ampere-hour lead acid accumulators, 26 volts of float charge voltages, 28 volts of even charging voltages; Load power consumption every day (50/24) * 12=25 ampere-hour; Because battery efficiency is generally about 75%, and storage battery can not discharge fully, thus storage battery once the cycle of charge and discharge is approximately 2.5 days fully.
Embodiment 2
With wind energy, solar energy, traditional energy (civil power) is example, as netting electricity generation system leaving of Fig. 2 mixing new forms of energy of the present invention.The wind energy in the net electricity generation system of mixing new forms of energy is transformed into direct current through controller independently with the frequency conversion of generator output, alternating current that transformation becomes power and is connected to system busbar; Solar energy is connected to system busbar through controller independently; Traditional energy (civil power or diesel engine generator) is connected to system busbar through charger, and storage battery and load are connected respectively to bus.
Mix in the control method that leaves the net electricity generation system of new forms of energy, priority level is set and is followed successively by wind energy, solar energy, civil power (also can set the service rating of new forms of energy as required arbitrarily).
Setting the storage battery float charge voltage is that UA volt, even charging voltage are the UB volts, and floating charge, the even charging voltage of setting commercial power charged machine are respectively UAC volt and UBC volt, wherein UAC=UA; UBC=UB; Floating charge, the even charging voltage of setting solar energy simultaneously are respectively UAX1=UA+ (0.1 ~ 0.3) volt and UBX1=UB+ (0.1 ~ 0.3) volt; Floating charge, the even charging voltage of setting wind energy are respectively UAX2=UA+ (0.4 ~ 0.5) volt and UBX2=UB+ (0.4 ~ 0.5) volt.
This system is made up of 10 kilowatts of solar cells of blower fan, rated power of 3 kilowatts of rated power, 7 kilowatts commercial power charged machine, 48 volt of 1000 ampere-hour storage battery complementation; About 7 kilowatts of maximum load, 54 volts of the commercial power charged machine float charge voltages of this system, 56 volts of even charging voltages; 54.2 volts and 56.2 volts of solar energy floating charge, even charging voltages; Blower fan floating charge, even charging voltage are respectively 54.5 volts and 56.5 volts.
Because the wind energy output voltage is higher than the solar energy output voltage and also is higher than external charging machine output voltage; Wind energy will be preferentially used in system load;, wind energy continues to use solar energy after can not satisfying the system load requirement again; Have only when wind energy, solar energy all can not satisfy load request, commercial power charged machine powers to the load again, in this system, has only when wind energy, solar energy and external charging machine all can not satisfy need of load just to be powered to the load by storage battery; Therefore in this system storage battery as stand-by power supply; Selecting for use of storage battery need not to consider to select large-capacity battery for use for electric for a long time, the scope of selecting load for use that also enlarges greatly simultaneously, and the power of load can increase to several kilowatts even tens kilowatts.
Embodiment 2 solar energy and wind power generation measuring numerical value such as following table (unit: kilowatt):
Last table be this adopt mixing new forms of energy of the present invention from one day actual measurement data of net operation of electric power system; This system's wind energy and sun the subject of knowledge and the object of knowledge electricity are all by load consumption; Insufficient section is directly replenished by civil power; Therefore storage battery carries out charge and discharge hardly, as long as storage battery is carried out once charge and discharge fully in that some cycles (such as 1, February) is artificial, therefore can prolong the life of storage battery greatly.
Claims (7)
- One kind mix new forms of energy from the net electricity generation system, comprise new forms of energy X1, X2, X3 ... Xn (wherein n ≧ 1); Traditional energy C1, C2, C3 ... Cn (wherein n ≧ 1); Storage battery and load; It is characterized in that the controller of each new forms of energy and traditional energy bus respectively is connected, storage battery and load are connected respectively to bus.
- 2. the control method from the net electricity generation system of mixing new forms of energy comprises new forms of energy X1, X2, X3 ... Xn (wherein n ≧ 1); Traditional energy C1, C2, C3 ... Cn (wherein n ≧ 1); Storage battery and load; The controller of each new forms of energy and traditional energy bus respectively is connected, and storage battery and load are connected respectively to bus; Wherein, the float charge voltage point value of storage battery is that UA, even charging voltage point value are UB, traditional energy C1, C2, C3 ... The float charge voltage point value of Cn (wherein n ≧ 1) is UAC1, UAC2, UAC3 ... UACn (wherein n ≧ 1); Traditional energy C1, C2, C3 ... The even charging voltage point value of Cn (wherein n ≧ 1) is UBC1, UBC2, UBC3 ... UBCn (wherein n ≧ 1); New forms of energy X1, X2, X3 ... The float charge voltage point value of Xn (wherein n ≧ 1) is UAX1, UAX2, UAX3 ... UAXn (wherein n ≧ 1); New forms of energy X1, X2, X3 ... The even charging voltage point value of Xn (wherein n ≧ 1) is UBX1, UBX2, UBX3 ... UBXn (wherein n ≧ 1); It is characterized in that UAX1 ﹥ UAX2 ﹥ UAX3 ﹥ ... ﹥ UAXn ﹥ UAC1 ﹥ UAC2 ﹥ UAC3 ﹥ ... ﹥ UACn ≧ UA (wherein n ≧ 1); UBX1 ﹥ UBX2 ﹥ UBX3 ﹥ ... ﹥ UBXn ﹥ UBC1 ﹥ UBC2 ﹥ UBC3 ﹥ ... ﹥ UBCn ≧ UB (wherein n ≧ 1).
- 3. the control method from the net electricity generation system of mixing new forms of energy according to claim 2 is characterized in that the magnitude of voltage of the control system of the said all kinds of form energy is set according to required priority level, and the voltage of override level setting is the highest.
- 4. electricity generation system is netted in leaving of mixing new forms of energy according to claim 1; It is characterized in that, said new forms of energy be solar energy, wind energy, biomass energy, geothermal energy, water can and one or more of the oceanic energy and the energy that bio-fuel and hydrogen produced of deriving out by regenerative resource.
- 5. mixing new forms of energy according to claim 1 from the net electricity generation system, it is characterized in that said traditional energy is like one or more of coal, oil, natural gas, timber.
- 6. the control method from the net electricity generation system of mixing new forms of energy according to claim 2; It is characterized in that, said new forms of energy be solar energy, wind energy, biomass energy, geothermal energy, water can and one or more of the oceanic energy and the energy that bio-fuel and hydrogen produced of deriving out by regenerative resource.
- 7. the control method from the net electricity generation system of mixing new forms of energy according to claim 2 is characterized in that, said traditional energy is like one or more of coal, oil, natural gas, timber.
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103023127A (en) * | 2012-12-28 | 2013-04-03 | 劲达技术(河源)有限公司 | Solar air conditioner and power supply method thereof |
| CN103208838A (en) * | 2013-03-28 | 2013-07-17 | 华为技术有限公司 | Power supply control method and device |
| CN103208837A (en) * | 2013-03-26 | 2013-07-17 | 武汉喻科电气有限公司 | Solar air conditioner and power supply method of same |
| CN104518563A (en) * | 2014-11-24 | 2015-04-15 | 武汉经开能源科技发展有限公司 | Electromobile charging system based on new energy application and control method thereof |
| CN109217447A (en) * | 2018-09-19 | 2019-01-15 | 武汉华风电子工程有限公司 | A kind of multi-energy complementation charging system and its method |
| CN109494802A (en) * | 2018-12-20 | 2019-03-19 | 中国电子科技集团公司第四十八研究所 | Anchor the uninterrupted micro power source system of floating platform off-network and floating platform power supply system for ocean |
| CN111953062A (en) * | 2020-07-30 | 2020-11-17 | 安徽信息工程学院 | Multi-energy complementary intelligent power supply system based on PWM control |
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| US20030222502A1 (en) * | 2002-05-30 | 2003-12-04 | Nec Tokin Corporation | Hybrid power supply system |
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Cited By (10)
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| CN103023127A (en) * | 2012-12-28 | 2013-04-03 | 劲达技术(河源)有限公司 | Solar air conditioner and power supply method thereof |
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| CN103208837A (en) * | 2013-03-26 | 2013-07-17 | 武汉喻科电气有限公司 | Solar air conditioner and power supply method of same |
| CN103208837B (en) * | 2013-03-26 | 2015-04-29 | 武汉喻科电气有限公司 | Solar air conditioner and power supply method of same |
| CN103208838A (en) * | 2013-03-28 | 2013-07-17 | 华为技术有限公司 | Power supply control method and device |
| CN103208838B (en) * | 2013-03-28 | 2015-06-17 | 华为技术有限公司 | Power supply control method and device |
| CN104518563A (en) * | 2014-11-24 | 2015-04-15 | 武汉经开能源科技发展有限公司 | Electromobile charging system based on new energy application and control method thereof |
| CN109217447A (en) * | 2018-09-19 | 2019-01-15 | 武汉华风电子工程有限公司 | A kind of multi-energy complementation charging system and its method |
| CN109494802A (en) * | 2018-12-20 | 2019-03-19 | 中国电子科技集团公司第四十八研究所 | Anchor the uninterrupted micro power source system of floating platform off-network and floating platform power supply system for ocean |
| CN111953062A (en) * | 2020-07-30 | 2020-11-17 | 安徽信息工程学院 | Multi-energy complementary intelligent power supply system based on PWM control |
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| CN102386636B (en) | 2014-01-29 |
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