CN102386636B - 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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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 to mix new forms of energy from net electricity generation system and control method thereof.
Background technology
Civil power is our said alternating current (AC), and the composition of alternating current comprises: three kinds of voltages, electric current, frequency, its frequency can be divided into 50HZ(hertz) with 60HZ(hertz) two kinds, voltage distributes by 100VA to 240VA.Be generally 220V(volt).
Traditional energy refers to that people are widely used, the energy of technical comparative maturity, as coal, oil, natural gas, water energy, timber etc. under present stage scientific and technological level condition.Traditional energy also claims conventional energy resource.Coal in traditional energy, oil and natural gas are all to be developed and formed by the Skeletal in time immemorial, therefore be referred to as fossil fuel.
New forms of energy (new energy sources) refer to the various energy forms outside traditional energy.Its various forms is mostly to come from directly or indirectly the heat energy (tidal energy exception) that the sun or earth interior depths produce.Comprised the energy that solar energy, wind energy, biomass energy, geothermal energy, water energy and oceanic energy and the bio-fuel being derived by regenerative resource and hydrogen produce.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, feature that reserves are large, for solving, the world today serious problem of environmental pollution and the exhausted problem of resource (particularly fossil energy) are significant.
Along with constantly bringing forth new ideas of new energy technology, increasing new forms of energy mix use with the combination of traditional energy, to reduce and alternative traditional energy, particularly fossil energy, are the development trends of current countries in the world.
From net generating (off-grid power generation) refer to adopt region Independent Power Generation, minute family Independent Power Generation from net powering mode.Type from net generating comprises: wind power generation, photovoltaic generation, wind light mutual complementing, wind-solar-diesel complementary, the complementation of water light, the complementation of water wind, the complementation of light bavin, diesel generation, natural gas power, micro-water power etc.
Range of application and purposes from net generating, comprise the 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.; Spaceflight apparatus satellite, spacecraft, Wireless power transmission etc.; Communication/communications field solar energy unattended operation microwave relay station, optical cable maintenance station, broadcast/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 defect of himself in the utilization of resources, and some area hours of daylight is short or wind-force is not enough, uses separately wind power generation or solar power generation can not meet the needs of power supply.But the complementarity of wind energy and solar energy is very strong, when calm, may have the sun, may have wind without the solar time, may wind when sunshine on daytime is sufficient little, may wind when have sunshine night not large.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 made up the defect 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, from net electric power system, has solved the difficult problem that remote districts cannot power, and has solved traditional this high difficult problem of power supply line loss great achievement.Not only alleviate power tense situation, also realized green energy resource simultaneously, developed the renewable energy resources, promoted the development of recycling economy.
Current being blended in the use procedure of net generating at new forms of energy and traditional energy, for example take wind energy, solar energy is example, the energy mix system forming with wind-driven generator and solar generator is by the control of blower fan, solar energy mixture control, to storage battery accumulation of energy, the frequency conversion that soon generator will send, the AC rectification of transformation become direct current, by this direct current to storage battery accumulation of energy, thereby to load, regularly provide power of alterating and direct current.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 meets the needs of actual loading by charge and discharge frequently, and the cycle-index of the complete charge and discharge of lead acid accumulator is greatly about 400 times, the higher system of cycle-index every day, the life-span of storage battery is very short.Charge-discharge characteristic due to storage battery, conventionally require to control between the 5%-30% that charging current is battery capacity, also be that 0.05C-0.3C(C is battery capacity), therefore battery capacity not only will meet the requirement of load, also to meet blower fan, the requirement of solar cell power output plate, therefore at above-mentioned new forms of energy and energy mix, mix in the range of application of using, to load, be to have certain condition restriction, for example, can not be too large for the general power of the load of selecting, the excessive load of power will be used the great storage battery of capacity, therefore at present the about 1 kilowatt of left and right of actual load of selecting or be less than 1 kilowatt.
Summary of the invention
The present invention, by setting from floating charge in net electricity generation system, even charging voltage point value, controls new forms of energy and is preferentially utilized, and extend the life-span of storage battery.
Concrete technical scheme is:
New forms of energy from a net electricity generation system, comprise new forms of energy X1, X2, X3 ... Xn(is n≤1 wherein); Traditional energy C1, C2, C3 ... Cn(is n≤1 wherein); Storage battery and load; The controller of each new forms of energy and traditional energy respectively bus is connected, and storage battery and load are connected respectively to bus.
The control method from net electricity generation system of new forms of energy, comprises new forms of energy X1, X2, X3 ... Xn(is n≤1 wherein); Traditional energy C1, C2, C3 ... Cn(is n≤1 wherein); 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 ... Cn(is n≤1 wherein) float charge voltage point value be UAC1, UAC2, UAC3 ... UACn(is n≤1 wherein); Traditional energy C1, C2, C3 ... Cn(is n≤1 wherein) even charging voltage point value be UBC1, UBC2, UBC3 ... UBCn(is n≤1 wherein); New forms of energy X1, X2, X3 ... Xn(is n≤1 wherein) float charge voltage point value be UAX1, UAX2, UAX3 ... UAXn(is n≤1 wherein); New forms of energy X1, X2, X3 ... Xn(is n≤1 wherein) even charging voltage point value be 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(is n≤1 wherein).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 are one or more of the energy that produces of solar energy, wind energy, biomass energy, geothermal energy, water energy and oceanic energy and the bio-fuel being derived by regenerative resource and hydrogen.
Above-mentioned traditional energy is as one or more of coal, oil, natural gas, timber.
Beneficial effect of the present invention:
The present invention, by setting from floating charge in net electricity generation system, even charging voltage point value, controls new forms of energy and is preferentially utilized.Adopt mixing new forms of energy of the present invention from net electricity generation system and control method thereof, can make new forms of energy preferentially power to the load, and extend the life-span of storage battery.
Accompanying drawing explanation
The existing mixing new forms of energy of Fig. 1 from net electricity generation system.
Fig. 2 the present invention mixing new forms of energy from net electricity generation system.
Embodiment
Embodiment 1
As Fig. 1 be traditional wind, light, commercial power integrated streetlamp existing mixing new forms of energy from net electricity generation system.Street lamp is 50 watts of LED lamp holders, within the longest day, lighting time is 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, the every daily power consumption of load (50/24) * 12=25 ampere-hour, because battery efficiency is generally in 75% left and right, and storage battery can not discharge completely, thus storage battery once the cycle of charge and discharge is approximately 2.5 days completely.
Embodiment 2
Take wind energy, solar energy, traditional energy (civil power) is example, mixing new forms of energy as of the present invention in Fig. 2 from net electricity generation system.The alternating current that by controller independently, the frequency conversion of generator output, transformation is become to power from wind energy in net electricity generation system that mixes new forms of energy is transformed into direct current and is connected to system busbar; Solar energy is connected to system busbar by controller independently; Traditional energy (civil power or diesel engine generator) is connected to system busbar by charger, and storage battery and load are connected respectively to bus.
Mix new forms of energy in the control method of net electricity generation system, priority level is set and is followed successively by wind energy, solar energy, civil power (also can set arbitrarily as required the service rating of new forms of energy).
Setting storage battery float charge voltage is that UA volt, even charging voltage are 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 are respectively UAX1=UA+(0.1 ~ 0.3 simultaneously) 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 comprised of 10 kilowatts of solar cells of blower fan, rated power of 3 kilowatts of rated power, the commercial power charged machine of 7 kilowatts, the complementation of 48 volt of 1000 ampere-hour storage battery, approximately 7 kilowatts of maximum loads, 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.
Due to wind energy output voltage higher than solar energy output voltage also higher than external charging machine output voltage, wind energy will be preferentially used in system load, after can not meeting system load requirement, wind energy continues again to use solar energy, only has the wind energy of working as, when solar energy all can not meet load request, commercial power charged machine powers to the load again, in this system, only has the wind energy of working as, when all can not meeting load needs, solar energy and external charging machine just by storage battery, powered to the load, therefore in this system storage battery as stand-by power supply, selecting without considering for a long time for load supplying is selected large-capacity battery of storage battery, the scope of selecting load simultaneously also greatly expanding, the power of load can increase to several kilowatts even tens kilowatts.
Embodiment 2 solar energy and wind power generation measurer body numerical value are as following table (unit: kilowatt):
Upper table be this adopt mixing new forms of energy of the present invention from the net operation of electric power system actual measurement data of a day, this system wind energy and sun the subject of knowledge and the object of knowledge electricity are all by load consumption, insufficient section is directly supplemented by civil power, storage battery carries out charge and discharge hardly, therefore as long as manually storage battery is carried out to once charge and discharge completely at some cycles (such as 1, February), therefore prolonging service life of battery greatly.
Claims (6)
1. mix new forms of energy from a 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; The controller of each new forms of energy and traditional energy respectively bus 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 ... Cn, wherein the float charge voltage point value of n≤1 is UAC1, UAC2, UAC3 ... UACn, wherein n≤1; Traditional energy C1, C2, C3 ... Cn, wherein the even charging voltage point value of n≤1 is UBC1, UBC2, UBC3 ... UBCn, wherein n≤1; New forms of energy X1, X2, X3 ... Xn, wherein the float charge voltage point value of n≤1 is UAX1, UAX2, UAX3 ... UAXn, wherein n≤1; New forms of energy X1, X2, X3 ... Xn, wherein the even charging voltage point value of 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; The magnitude of voltage of the control system of the described all kinds of form energy is set according to required priority level, and the voltage of override level setting is the highest.
2. the control method from 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 respectively bus 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 ... Cn, wherein the float charge voltage point value of n≤1 is UAC1, UAC2, UAC3 ... UACn, wherein n≤1; Traditional energy C1, C2, C3 ... Cn, wherein the even charging voltage point value of n≤1 is UBC1, UBC2, UBC3 ... UBCn, wherein n≤1; New forms of energy X1, X2, X3 ... Xn, wherein the float charge voltage point value of n≤1 is UAX1, UAX2, UAX3 ... UAXn, wherein n≤1; New forms of energy X1, X2, X3 ... Xn, wherein the even charging voltage point value of 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; The magnitude of voltage of the control system of the described all kinds of form energy is set according to required priority level, and the voltage of override level setting is the highest.
3. mixing new forms of energy according to claim 1 from net electricity generation system, it is characterized in that, described new forms of energy are one or more of the energy that produces of solar energy, wind energy, biomass energy, geothermal energy, water energy and oceanic energy and the bio-fuel being derived by regenerative resource and hydrogen.
Mixing new forms of energy according to claim 1 from net electricity generation system, it is characterized in that, described traditional energy is as one or more of coal, oil, natural gas, timber.
5. the control method from net electricity generation system of mixing new forms of energy according to claim 2, it is characterized in that, described new forms of energy are one or more of the energy that produces of solar energy, wind energy, biomass energy, geothermal energy, water energy and oceanic energy and the bio-fuel being derived by regenerative resource and hydrogen.
6. the control method from net electricity generation system of mixing new forms of energy according to claim 2, is characterized in that, described traditional energy is as one or more of coal, oil, natural gas, timber.
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| CN103023127B (en) * | 2012-12-28 | 2014-12-31 | 劲达技术(河源)有限公司 | Solar air conditioner and power supply method thereof |
| 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 |
| CN103208838B (en) * | 2013-03-28 | 2015-06-17 | 华为技术有限公司 | Power supply control method and device |
| CN104518563B (en) * | 2014-11-24 | 2017-11-14 | 武汉经开能源科技发展有限公司 | The control method of charging system for electric automobile based on new energy application |
| 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 |
| CN111953062B (en) * | 2020-07-30 | 2022-03-22 | 安徽信息工程学院 | Multi-energy complementary intelligent power supply system based on PWM control |
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| CN101309017B (en) * | 2008-07-11 | 2012-05-30 | 中国科学院电工研究所 | Wind power and photovoltaic power complementary power supply system based on mixed energy accumulation of super capacitor accumulator |
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