CN102056380B - Distributed synchronization solar energy street lamp control system - Google Patents
Distributed synchronization solar energy street lamp control system Download PDFInfo
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- CN102056380B CN102056380B CN 201010599431 CN201010599431A CN102056380B CN 102056380 B CN102056380 B CN 102056380B CN 201010599431 CN201010599431 CN 201010599431 CN 201010599431 A CN201010599431 A CN 201010599431A CN 102056380 B CN102056380 B CN 102056380B
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Abstract
The invention discloses a distributed synchronization solar energy street lamp control system comprising a photovoltaic cell array, a centralized control system, a storage cell array and an inverter, wherein the photovoltaic cell array and the storage cell array are respectively connected with the centralized control system connected with the inverter; and the alternating current output end of the inverter is connected with a street lamp sequenced power supply installed on a road. The centralized control system comprises a sensor subsystem and a principal computer control center subsystem, wherein the sensor subsystem comprises a sunlight sensor for detecting the illumination intensity of the street lamp working condition; the principal computer control center subsystem is used for controlling the photovoltaic cell array to convert solar energy into electric energy so as to store the electric energy in the storage cell array according to a signal collected by the sensor subsystem when the illumination intensity detected by the sunlight sensor is more than a preset threshold; and otherwise, the storage cell array is controlled to discharge and supply power for the street lamp sequence by the inverter. The distributed synchronization solar energy street lamp control system can improve stability, has high utilization ratio of the photovoltaic cell and the storage cell, lowers application cost and strengthens maintainability.
Description
Technical field
The present invention relates to Solar Street Lighting System and Detection ﹠ Controling field thereof, especially relate to the street lamp control system of distributed photovoltaic microgrid.
Background technology
Along with expanding economy, energy shortage is the problem that each country of the whole world all faces.Simultaneously be faced with exhausted danger as most important available fossil energy material such as coal, oil, natural gas etc., it is more and more serious that the energy shortage problem is just becoming, and have influence on people's living standard.On the other hand, problems such as the environmental pollution that fossil energy brought, climate warming can't have been ignored, have influenced the development and the popularization of sustainable development, energy-conserving and environment-protective theory, just more and more are subjected to people's attention.In numerous novel energies, solar energy have cleanliness without any pollution, safe and reliable, restriction less, the advantages such as inexhaustible not to the utmost, sustainable use used, thereby have incomparable advantage.Distributed power generation can digest electric power on the spot, saves power transmission and transformation investment and operating cost, reduces the line loss of concentrating transmission of electricity; And complement one another with big mains supply, reduce net capacity, improve electrical network peak valley performance, improve power supply reliability.
China's solar energy resources is very abundant, not only has benefits such as real economy, society, environment in correlation techniques such as China's research solar energy, micro power networks, also has good condition.Solar energy just is being widely used in every field as cleaning new energy.Solar Street Lighting System is energy-conservation in running, economy and environmental protection, has remarkable economic efficiency and social benefit, is subjected to the attention of government and the approval of society day by day.All circles of government just actively strengthen the promotion efficiency of solar street light illumination, constantly improve system and management, realize health, the sustainable development of solar street light illumination cause, for the energy-saving and emission-reduction sustainable development contributes.Existing Solar Street Lighting System all is a system independently, as number of patent application be: 201010152706.1, Chinese invention patent applications such as 200910106054.5 openly illustrate, generally include photovoltaic battery panel, controller, storage battery, lighting, lamp stand and correlative protection device etc., as shown in Figure 1.If lighting is to use alternating current, this system also need comprise a miniature inverter.This autonomous system is fixed on the top of lamp stand with photovoltaic battery panel, and storage battery and controller are installed in the middle of the lamp stand or are embedded under the road surface.Photovoltaic battery panel transfers sunlight to electric energy and charges a battery when illuminance is strong.During the diminuendo of light degree, the automatic starting switch of controller, storage battery are the illuminating lamp power supply; During the illuminance crescendo, it is the illuminating lamp power supply that storage battery stops, and photovoltaic battery panel restarts conversion solar can be electric energy, and storage battery continues to charge.Because solar street light has environmental protection, construction need not excavated pavement, and advantages such as suitable remote districts have been subjected to the particularly favor of government department of various places.Yet in concrete implementation process, existing Solar Street Lighting System scheme exists many defectives:
1) every street lamp all independently becomes a miniature photovoltaic system, and the cost height is uneconomical.Photovoltaic cell and storage battery are the highest assemblies of cost in the whole photovoltaic system at present, and large-scale photovoltaic system can improve the utilization ratio of photovoltaic cell and storage battery, reduce application cost.
2) consider the factor of continuous rainy weather, the capacity of storage battery and the power of photovoltaic cell must be at more than 6 times of load day consumption, and initial investment also is exaggerated 6 times.Simultaneously because winter and summer intensity of illumination and the influence of time difference, there are huge waste in the energy and equipment, and storage battery usually was in the running status of putting in the winter time, have shortened the useful life of storage battery.
3) control system of every lamp is all disperseed independence, because the influence of senser element and light-operated destabilizing factor, the switching time of street lamp is inconsistent, can't unify control, and can not satisfy urban air defense or otherwise dimout requirement.
4) in the lamp stand eminence large-area photovoltaic cell and storage battery are installed,, are had potential safety hazard, and the cost of manufacture of lamp stand is higher than common lamp stand, also strengthened the initial stage input because the shear action of wind-force is very big to the stress of lamp stand.
5) because street lamp disperses, and photovoltaic cell and storage battery are aloft, the regular maintenance inconvenience, photovoltaic battery panel and storage battery are stolen serious.
6) existing scheme can only be applied in the new road lamp system, can't utilize transitional street lamps system facility to transform it as solar powered system.
In sum, existing Solar Street Lighting System scheme is not economical and practical.
Summary of the invention
For poor stability, photovoltaic cell that overcomes existing solar street light and the deficiency that the storage battery utilance is lower, application cost is higher, maintainability is relatively poor, the invention provides that a kind of stability is high, photovoltaic cell and the storage battery utilance is higher, application cost is lower, the easy to maintenance distributed control system of solar energy street lamp that is incorporated into the power networks.
The technical solution adopted for the present invention to solve the technical problems is:
A kind of distributed control system of solar energy street lamp that is incorporated into the power networks comprises photovoltaic battery array, centralized control system, accumulator array and inverter.Described photovoltaic battery array, accumulator array are connected with described centralized control system respectively, described centralized control system is connected with described inverter, the ac output end of described inverter is connected with street lamp Sequenced Power Supplys on being installed in road, described centralized control system comprises: sensor subsystem comprises the sunshine recorder in order to the intensity of illumination that detects the photovoltaic battery array operational environment; The PC control center subsystem, in order to the signal of gathering according to the receiving sensor subsystem, illuminance during when the sensor at sunshine greater than predetermined threshold value, the control photovoltaic battery array is that electrical power storage is in accumulator array with solar energy converting, when the illuminance during smaller or equal to predetermined threshold value of sensor at sunshine, the discharge of control accumulator array is also powered to the street lamp sequence by inverter.
Further, the power of described photovoltaic battery array is corresponding to power consumption on the one of street lamp sequence load, and the charging interval, computing formula was: P by local minimum solar radiation duration calculation in winter
s=W
R/ tC, wherein W
RBe street lamp load power consumption on the one, t is one day short-day duration, and C is the overall efficiency of system, P
sBe the power of required photovoltaic battery array.
Further again, described centralized control system also comprises: the accumulator array ADMINISTRATION SUBSYSTEM, and charging process adopts 3 sections charging strategy, promptly fills stage, constant voltage charge stage and floating charge stage soon, when storage battery enters the floating charge stage near being full of entirely, adopt the charging voltage V lower than charging normal
fCharge floating charge stage charging voltage V
fComputing formula be: V
f=V
0+ (T-25) C, wherein, V
0Be storage battery benchmark charging voltage, T is a Current Temperatures, and 25 ℃ is fiducial temperature, and C is a temperature compensation coefficient.
Further, described inverter connects an end of absorption-type single dpdt double-pole double-throw (DPDT) formula controlled switch, first output of described absorption-type single dpdt double-pole double-throw (DPDT) formula controlled switch is connected with described street lamp sequence, and second output of described single-pole double throw formula controlled switch is connected with utility grid;
In the described accumulator array ADMINISTRATION SUBSYSTEM, when storage battery reaches when overcharging, control subsystem is cut off charging circuit, and the scheduling inverter will unnecessary electric power be powered to utility grid with net mode also; When storage battery reached when putting, cut off the storage battery power supply circuit, the electric power of scheduling utility grid is described street lamp sequence power supply.
Described sensor subsystem also comprises: in order to detect the temperature sensor of photovoltaic battery array operating ambient temperature, in order to detect the humidity sensor of photovoltaic battery array operational environment humidity; Described centralized control system also comprises: MPPT maximum power point tracking and control subsystem, in order to intensity of sunshine, temperature, the humidity environment parameter that obtains according to sensor subsystem, adopt neural reasoning (the Adaptive Neuro-Fuzzy InferenceSystem--ANFIS) technology of adaptive fuzzy to adjust output voltage automatically.
Described photovoltaic battery array is made up of the subregion photovoltaic battery panel, described photovoltaic battery panel is installed on the governor motion of inclination angle, described centralized control system also comprises: the automatic sunlight of photovoltaic battery array is followed the trail of and control subsystem, in order to control described inclination angle governor motion by the method for difference ladder stepping (Difference Step Ladder--DSL), adjust the inclination angle of photovoltaic battery panel in real time according to local sunlight moving law.
Described centralized control system also comprises: street lamp intelligent switch subsystem, the intensity of illumination start signal that obtains after relatively in order to illuminance that the PC control center subsystem is detected sunshine recorder and predetermined threshold value, intensity of illumination start signal and time start signal are got " with " logic, open or close the street lamp sequence automatically by control circuit.
In the described street lamp intelligent switch subsystem, accept the instruction of PC control center subsystem and open or close the street lamp sequence.
Be connected on the circuit between second output of described absorption-type single dpdt double-pole double-throw (DPDT) formula controlled switch and the described utility grid in order to the ammeter of power supply in metering and the network process with the both forward and reverse directions rotation of the difference of electricity consumption; Be connected the ammeter that is rotated in the forward that uses the electric weight of civil power in order to the metering road lamp system on the circuit between first output of described absorption-type single dpdt double-pole double-throw (DPDT) formula controlled switch and the street lamp sequence; Described centralized control system also comprises: the electric quantity metering subsystem, comprise the ammeter of the positive and negative both direction metering of energy power consumption and the ammeter of a forward metering power consumption, in order to measure this street lamp sequence and network process in the value of utility grid generation energy exchange.
Described centralized control system also comprises: isolated island is surveyed and control subsystem, in order to when being in and during net mode, adopt intentional frequency offset method (Active Frequency Drift--AFD) to survey the power supply state of utility grid, when the street lamp facility system was in island state, control inverter stopped to power to utility grid.
Technical conceive of the present invention is: the present invention is incorporated into the solar street light illuminator with the control method and the power scheduling strategy of distributed microgrid, has designed a kind of control method and architecture device of the novel distributed solar street light that is incorporated into the power networks.
Form by several parts such as photovoltaic battery array, centralized control system, accumulator array, inverter, two-way electric quantity meterings, adopt distinctive control method and scheduling strategy to be the power supply of street lamp sequence, as shown in Figure 2.Wherein photovoltaic battery array and accumulator array are solar energy converting and storage device.When illuminance is strong photovoltaic battery array with solar energy converting be power storage in accumulator array, accumulator array discharge when illuminance is weak, inverter is converted to the alternating current identical with civil power for the road lamp system illumination with the direct current of storage battery output.The street lamp sequence is present existing universal street lamp illuminator, only the mains supply input of road lamp system need be joined the native system inverter output end gets final product, simultaneously the mains supply input is managed by centralized control system, can be under the prerequisite that does not change existing road lamp system facility, adopting solar energy is the road lamp system power supply.
Beneficial effect of the present invention mainly shows: beneficial effect of the present invention mainly shows:
1) realized solar powered street lighting on the transitional street lamps facility, helped environmental protection and energy-saving and emission-reduction, and need not existing system's rectification be need not to customize off-gauge lighting and strengthens lamp stand, practical, it is convenient to implement;
2) realized that the scale of photovoltaic cell and storage battery is integrated, improved the resource utilization of equipment, reduced project implementation difficulty and initial stage and dropped into;
3) by generating electricity by way of merging two or more grid systems and electricity consumption, the electric power that summer is the unnecessary utility grid of feeding on the one hand, in having realized throughout the year on the other hand under different weathers and the illumination condition road lamp system reliablely and stablely throw light on, reduce the standby surplus of photovoltaic cell and storage battery, avoided the energy waste and the wasting of resources;
4) realized concentrated enforcement of whole system and centralized management, adopted visual administrative center, strengthened systemic-function, made things convenient for system maintenance, strengthened the stability and the reliability of system, and reduced maintenance cost;
5) road lamp system adopts unified light-operated and time control, has guaranteed street lamp opening and closing time unanimity, and is reliable and stable.And realized the control as required of street lamp, with the special lighting of satisfying urban road and the requirement of dimout, control is flexibly.
Description of drawings
Fig. 1 is existing independent solar street lamp control structure figure;
Fig. 2 is the distributed Solar Street Lighting System structure chart that is incorporated into the power networks among the present invention;
Fig. 3 is this control system structural framing;
Fig. 4 is road lamp system control method and scheduling strategy
Embodiment
In conjunction with the accompanying drawings embodiments of the invention are elaborated: present embodiment is being to implement under the prerequisite with the technical solution of the present invention, provided detailed execution mode and concrete operating process, but protection scope of the present invention is not limited to following embodiment.
With reference to Fig. 2～Fig. 4, a kind of control system of the distributed solar street light that is incorporated into the power networks, form by several parts such as photovoltaic battery array, centralized control system, accumulator array, inverter, two-way electric quantity meterings, adopt distinctive control method and scheduling strategy to be the power supply of street lamp sequence, as shown in Figure 2.Wherein photovoltaic battery array and accumulator array are solar energy converting and storage device.When illuminance is strong photovoltaic battery array with solar energy converting be power storage in accumulator array, accumulator array discharge when illuminance is weak, inverter is converted to the alternating current identical with civil power for the road lamp system illumination with the direct current of storage battery output.The street lamp sequence is present existing universal street lamp illuminator, only the mains supply input of road lamp system need be joined the native system inverter output end gets final product, simultaneously the mains supply input is managed by centralized control system, can be under the prerequisite that does not change existing road lamp system facility, adopting solar energy is the road lamp system power supply.
Its power of described photovoltaic battery array is corresponding to power consumption on the one of street lamp sequence load, and the charging interval, computing formula was: P by local minimum solar radiation duration calculation in winter
s=W
R/ tC, wherein W
RBe street lamp load power consumption on the one, t is one day short-day duration, and C is the overall efficiency of system, P
sBe the power of required photovoltaic battery array.Photovoltaic battery array is judged the power of ambient light illumination simultaneously as light-sensitive element, and feeds back to control centre so that the open and close of decision-making street lamp.
Described accumulator array capacity is a power consumption on the one of street lamp load, and it discharges and recharges by control system centralized management, and integrated overcharging comparatively accurately with crossing put point protection in control module, can prolong the useful life of storage battery.
The direct current that described inverter discharges storage battery transfers the alternating current of city's electric standard to, can insert existing road lamp system confession street lighting on the one hand, can be incorporated into the power networks with civil power on the other hand, powers to city's electrical network under the abundant situation of photovoltaic battery array electric power.
Described street lamp sequence is general existing road lamp system, need not the transitional street lamps system is transformed.And accessories such as light fixture, lamp stand are ripe standard fitting, the convenient system cost that reduces of market purchasing, and then reduce initial investment
Described centralized control system is characterized in that: system is become by 6 groups of subsystems, the automatic sunlight tracking and control subsystem, street lamp intelligent switch subsystem, sensing subsystem and the isolated island that comprise PC control center subsystem, accumulator array ADMINISTRATION SUBSYSTEM, the tracking of maximum power of photovoltaic cell point and control subsystem, photovoltaic battery panel are surveyed and control subsystem, as shown in Figure 3.The control system centralized control co-ordinations such as photovoltaic battery array, accumulator array, inverter; and have a historical events record, accumulator super-charge with cross put protection, maximum power of photovoltaic cell point is followed the tracks of and functions such as automatic sunlight tracking, isolated island effect prevention and intelligent road-lamp switch.
Described its entity of PC control center subsystem is a cover intelligent monitoring software, can show the operating state of each several part equipment in real time, and according to its operating state to each several part equipment sending controling instruction.This control centre can write down the historical events of each several part equipment simultaneously, to maintain easily and the trackability inspection.
Described accumulator array ADMINISTRATION SUBSYSTEM has and overcharges and cross temperature compensation function in the defencive function put and the charging process.Electric current is to the impact of storage battery in the charging process in order to reduce, and charging process adopts 3 sections charging strategy, promptly fills stage, constant voltage charge stage and floating charge stage soon.When storage battery when being full of entirely, enter the floating charge stage for preventing to overcharge, promptly adopt the charging voltage V lower than charging normal
fCharge.Floating charge stage charging voltage V
fComputing formula be: V
f=V
0+ (T-25) C.V wherein
0Be storage battery benchmark charging voltage, T is a Current Temperatures, and 25 ℃ is fiducial temperature, and C is a temperature compensation coefficient.When storage battery reaches when overcharging, control subsystem is cut off charging circuit, and feeds back to control centre, by control centre's scheduling inverter unnecessary electric power is powered to utility grid by being incorporated into the power networks; When storage battery reached when putting, control subsystem is cut off the storage battery power supply circuit, and feeds back to control centre, is street lighting by electric power of its scheduling utility grid.
Environmental parameters such as the intensity of sunshine that described MPPT maximum power point tracking and control subsystem obtain according to sensor-based system, temperature, humidity, adopt the neural inference system of adaptive fuzzy to adjust output voltage automatically, so that photovoltaic battery array reaches maximum power output.
The automatic sunlight of described photovoltaic array is followed the trail of the inclination angle that can adjust photovoltaic battery panel with control subsystem according to local sunlight moving law by the method for difference ladder stepping automatically, to guarantee that cell panel all the time with the best angle forward sun, receives irradiation of sunlight to greatest extent.
Described street lamp intelligent switch subsystem obtains the parallel duplex sensing data according to sensing subsystem, adopt data fusion method to determine the illumination value of information, obtain the intensity of illumination start signal with the interior intensity of illumination threshold ratio of establishing, get with the time start signal then " with " logic, automatically open or close the street lamp sequence by control circuit, this subsystem can be accepted the instruction of control centre to open or to close the street lamp sequence at any time, with dimout or other the special illumination requirements of satisfying avenue simultaneously.
Described sensing subsystem adopts the topological structure of area distribution formula, temperature in the collection facility operational environment, humidity, intensity of sunshine etc., and environmental parameter is packaged as the fieldbus data bag, adopt the tcp/ip communication agreement to pass to control centre then for decision-making.
Its entity of described electric quantity metering system is the ammeter that the ammeter of the positive and negative both direction metering of an energy power consumption and can only forward metering power consumptions, in order to measure this street lamp facility and network process in the value of utility grid generation energy exchange.The ammeter that wherein is rotated in the forward is in order to the electric weight of metering road lamp system use civil power, and the ammeter of both forward and reverse directions rotation is in order to the difference of power supply and electricity consumption in metering and the network process.
Described isolated island is surveyed with control subsystem and is adopted the intentional frequency offset method to survey the power supply state of this street lamp facility system and city's electrical network in road lamp system and network process, and control centre's control inverter stops to power to utility grid when the street lamp facility system is in island state.
The described control centre scheduling strategy that is incorporated into the power networks is characterized by: the capacity of accumulator array is according to power consumption configuration on the one of street lamp sequence load, the power of photovoltaic battery panel is by short-day time configuration in winter, in summer or other illumination in season plenty of time, the photovoltaic battery array energy output is much larger than the power consumption of street lamp sequence.After the accumulator array electric weight was full, control centre will start inverter and utility grid is incorporated into the power networks, with remaining electric weight to mains supply.In the winter time or continuous many days rainy weather, when storage battery was in when putting the stage, utility grid will be dispatched to the power supply of street lamp sequence, as shown in Figure 4 by control centre.This strategy has improved utilization rate of equipment and installations on the one hand, has significantly reduced the configuration of equipment, has reduced the initial stage input, has guaranteed that on the other hand street lamp illumination system is stable at any time and works reliably.
Present embodiment is the transformation of the road lamp system of pedestrian's public transport road in the Hangzhou, long 5 kilometers of road, have 330 high-pressure sodium lamps, 250 watts in every street lamp, the longest lighting time is 10 hours under the normal weather condition, power consumption on the one is 825 kilowatt hours, and one day short-day time was to be 8 hours the photovoltaic battery array effective time.
This Solar Street Lighting System that is incorporated into the power networks is made up of photovoltaic battery array, centralized control system, inverter, accumulator array and transitional street lamps facility, as shown in Figure 3.Calculating the photovoltaic battery array gross power according to the power capacity relation is 110kW, and accumulator array is the lead-acid sealed battery of 370 12V@200Ah, and total capacity is 48V@18500Ah.The automatic sunlight tracking of control system is integrated PC control center subsystem, accumulator array ADMINISTRATION SUBSYSTEM, the tracking of maximum power of photovoltaic cell point and control subsystem, photovoltaic battery panel and control subsystem, street lamp intelligent switch subsystem, sensing subsystem and isolated island are surveyed and control subsystem.The PC control center is a cover intelligent monitoring software, adopts OO VC++ programming mode to write, and has the historical events writing function with the trackability inquiry that makes things convenient for incident with maintain easily.The accumulator array ADMINISTRATION SUBSYSTEM has accumulator super-charge and crosses puts defencive function.Battery charging process adopts 3 sections charging strategy, promptly fills stage, constant voltage charge stage and floating charge stage soon, and according to the accumulator array characteristic, float charge voltage V
fTemperature compensation coefficient C value is 0.015 in the computing formula.Maximum power of photovoltaic cell point is followed the tracks of the running parameter that adopts neural inference system (ANFIS) algorithm of adaptive fuzzy to adjust photovoltaic battery array automatically according to parameters such as temperature, illuminance, load characteristics and is exported to obtain maximum power.The automatic sunlight of photovoltaic array is followed the trail of with control subsystem and is adopted the method for difference ladder stepping (DSL) to press the inclination angle of adjusting photovoltaic battery panel automatically according to local sunlight moving law, to guarantee that cell panel all the time with the best angle forward sun, receives irradiation of sunlight to greatest extent.Isolated island survey with control subsystem adopt intentional frequency offset (AFD) method can be in road lamp system and network process the power supply state of this street lamp of active probe facility system and city's electrical network, control centre stops control inverter powering to utility grid when the street lamp facility system is in island state.The intelligent road-lamp switch subsystem adopts many group illuminance parameters to obtain illuminance switch open signal, gets with the time start signal then " with " logic obtains street lamp sequence switching signal.
Photovoltaic battery array is installed on the roof of the other factory building of road, and control centre, accumulator array and inverter etc. are placed in the andron of factory building Stall, and have the special messenger to be responsible for maintenance.At other temperature and the intensity of illumination transducer installed of the photovoltaic array on roof, other temperature, the humidity sensor installed of supervisory control system and storage battery, the environmental data that transducer is gathered is packaged as the ModBus packet, is passed to control centre with the tcp/ip communication agreement then.
Solar street light control method and power scheduling strategy are as shown in Figure 4.In the winter time or rainy weather, the enough street lamp sequences of the photovoltaic cell of this system and the power of accumulator array and capacity are at illumination work stably at night, and under the situation of continuous rainy weather, storage battery was in when putting state, control system can be cut off storage battery power supply automatically, and, power by city's electrical network with street lamp sequence connection utility grid.In summer or abundant time of spring and autumn sunlight, the photovoltaic battery array generating still has residue after being full of storage battery.When detecting storage battery, control system is in when overcharging state, can cut off charging circuit automatically, and unlatching isolated island detection subsystem, opening inverter then powers by being incorporated into the power networks unnecessary electric power to city's electrical network, and at this moment, owing to a large amount of air-conditionings that use in the city go out the situation of electric energy shortage, just in time played the effect that the utility grid peak value is regulated.
The street lamp sequence adopts the light-operated Based Intelligent Control that combines with time control, and directly uses photovoltaic battery array to discern the power of intensity of illumination as light sensor.The output current that detects photovoltaic battery array when control system is during less than setting threshold, and the time timer timing is when arriving, and control system will can be unified fitly to light street lamp, otherwise street lamp is closed in unification to the power supply of street lamp sequence.Simultaneously when urban lighting control or street lamp facility were safeguarded, road lamp system can be opened or close to control system on demand at any time neatly.
At last, it is also to be noted that what more than enumerate only is a specific embodiment of the present invention.Obviously, the invention is not restricted to above embodiment, many distortion can also be arranged.All distortion that those of ordinary skill in the art can directly derive or associate from content disclosed by the invention all should be thought protection scope of the present invention.
Claims (1)
1. distributed control system of solar energy street lamp that is incorporated into the power networks, it is characterized in that: comprise photovoltaic battery array, centralized control system, accumulator array and inverter, described photovoltaic battery array, accumulator array are connected with described centralized control system respectively, described centralized control system is connected with described inverter, the ac output end of described inverter is connected with street lamp Sequenced Power Supplys on being installed in road, and described centralized control system comprises:
Sensor subsystem comprises the sunshine recorder in order to the intensity of illumination that detects the street lamp operational environment;
The PC control center subsystem, in order to the signal of gathering according to the receiving sensor subsystem, when the illuminance during greater than predetermined threshold value of sensor at sunshine, the control photovoltaic battery array is that electrical power storage is in accumulator array with solar energy converting; When the illuminance during smaller or equal to predetermined threshold value of sensor at sunshine, the discharge of control accumulator array is also powered to the street lamp sequence by inverter;
The power of described photovoltaic battery array is corresponding to power consumption on the one of street lamp sequence load, and the charging interval, computing formula was: P by local minimum solar radiation duration calculation in winter
s=W
R/ tC, wherein W
RBe street lamp load power consumption on the one, t is one day short-day duration, and C is the overall efficiency of system, P
sBe the power of required photovoltaic battery array;
Described centralized control system also comprises:
The accumulator array ADMINISTRATION SUBSYSTEM, charging process adopts 3 sections charging strategy, promptly fills stage, constant voltage charge stage and floating charge stage soon, when storage battery enters the floating charge stage near being full of entirely, adopts the charging voltage V lower than charging normal
fCharge floating charge stage charging voltage V
fComputing formula be: V
f=V
0+ (T-25) C, wherein, V
0Be storage battery benchmark charging voltage, T is a Current Temperatures, and 25 ° of C are fiducial temperature, and C is a temperature compensation coefficient;
Described inverter connects an end of absorption-type single dpdt double-pole double-throw (DPDT) formula controlled switch, first output of described absorption-type single dpdt double-pole double-throw (DPDT) formula controlled switch is connected with described street lamp sequence, and second output of described absorption-type single dpdt double-pole double-throw (DPDT) formula controlled switch is connected with utility grid;
In the described accumulator array ADMINISTRATION SUBSYSTEM, when storage battery reaches when overcharging, control subsystem is cut off charging circuit, and the scheduling inverter will unnecessary electric power be powered to utility grid with net mode also; When storage battery reached when putting, cut off the storage battery power supply circuit, the electric power of scheduling utility grid is described street lamp sequence power supply;
Described sensor subsystem also comprises: in order to detect the temperature sensor of photovoltaic battery array operating ambient temperature, in order to detect the humidity sensor of photovoltaic battery array operational environment humidity; Described centralized control system also comprises: MPPT maximum power point tracking and control subsystem, in order to intensity of sunshine, temperature, the humidity environment parameter that obtains according to sensor subsystem, adopt the neural inference technology of adaptive fuzzy to adjust output voltage automatically;
Described photovoltaic battery array is made up of the subregion photovoltaic battery panel, described photovoltaic battery panel is integrated on the governor motion of inclination angle, described centralized control system also comprises: the automatic sunlight of photovoltaic array is followed the trail of and control subsystem, in order to control described inclination angle governor motion by the method for difference ladder stepping, adjust the inclination angle of photovoltaic battery panel in real time according to local sunlight moving law;
Described centralized control system also comprises: street lamp intelligent switch subsystem, the intensity of illumination start signal that obtains after relatively in order to illuminance that the PC control center subsystem is detected sunshine recorder and predetermined threshold value, intensity of illumination start signal and time start signal are got " with " logic, open or close the street lamp sequence automatically by control circuit;
Described street lamp intelligent switch subsystem is accepted the instruction of PC control center subsystem and is opened or close the street lamp sequence;
Be connected on the circuit between second output of described absorption-type single dpdt double-pole double-throw (DPDT) formula controlled switch and the described utility grid in order to the ammeter of power supply in metering and the network process with the both forward and reverse directions rotation of the difference of electricity consumption; Be connected the ammeter that is rotated in the forward that uses the electric weight of civil power in order to the metering road lamp system on the circuit between first output of described absorption-type single dpdt double-pole double-throw (DPDT) formula controlled switch and the street lamp sequence; Described centralized control system also comprises: the electric quantity metering subsystem, comprise the ammeter of the positive and negative both direction metering of energy power consumption and the ammeter of a forward metering power consumption, in order to measure this street lamp sequence and network process in the value of utility grid generation energy exchange;
Described centralized control system also comprises: isolated island is surveyed and control subsystem, in order to when being in and during net mode, adopt the intentional frequency offset method to survey the power supply state of utility grid, when the street lamp facility system was in island state, control inverter stopped to power to utility grid.
Priority Applications (1)
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