CN112768268B - Night reactive power suppression control device for string-type inverter of distributed photovoltaic power station - Google Patents
Night reactive power suppression control device for string-type inverter of distributed photovoltaic power station Download PDFInfo
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- CN112768268B CN112768268B CN202110121965.6A CN202110121965A CN112768268B CN 112768268 B CN112768268 B CN 112768268B CN 202110121965 A CN202110121965 A CN 202110121965A CN 112768268 B CN112768268 B CN 112768268B
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H7/00—Devices for introducing a predetermined time delay between the initiation of the switching operation and the opening or closing of the contacts
- H01H7/02—Devices for introducing a predetermined time delay between the initiation of the switching operation and the opening or closing of the contacts with fluid timing means
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H3/00—Mechanisms for operating contacts
- H01H3/02—Operating parts, i.e. for operating driving mechanism by a mechanical force external to the switch
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02S—GENERATION OF ELECTRIC POWER BY CONVERSION OF INFRARED RADIATION, VISIBLE LIGHT OR ULTRAVIOLET LIGHT, e.g. USING PHOTOVOLTAIC [PV] MODULES
- H02S40/00—Components or accessories in combination with PV modules, not provided for in groups H02S10/00 - H02S30/00
- H02S40/30—Electrical components
- H02S40/32—Electrical components comprising DC/AC inverter means associated with the PV module itself, e.g. AC modules
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02S—GENERATION OF ELECTRIC POWER BY CONVERSION OF INFRARED RADIATION, VISIBLE LIGHT OR ULTRAVIOLET LIGHT, e.g. USING PHOTOVOLTAIC [PV] MODULES
- H02S40/00—Components or accessories in combination with PV modules, not provided for in groups H02S10/00 - H02S30/00
- H02S40/30—Electrical components
- H02S40/38—Energy storage means, e.g. batteries, structurally associated with PV modules
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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
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/50—Photovoltaic [PV] energy
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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
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E70/00—Other energy conversion or management systems reducing GHG emissions
- Y02E70/30—Systems combining energy storage with energy generation of non-fossil origin
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- Photovoltaic Devices (AREA)
Abstract
The invention belongs to the technical field of solar power generation, and particularly relates to a night reactive suppression control device for a string inverter of a distributed photovoltaic power station, which comprises a box body and a solar cell panel, wherein a delay cylinder is fixedly sleeved on the inner surface of a fixing ring, a mechanical delay device is arranged in the delay cylinder, a first initial hole is formed in the peripheral side surface of the delay cylinder, an anti-overflow device is arranged in the first initial hole, and a trigger device is arranged on the inner wall of the other side of the box body. This distributing type photovoltaic power plant group string formula dc-to-ac converter reactive suppression controlling means at night, the extrusion that the second slider received gravel and sand moves down along time delay section of thick bamboo inner wall with first slider is synchronous, the time that gravel and sand completely flows into the time of time delay piece is the time of photovoltaic power plant's solar power system and national electric wire netting for the dc-to-ac converter power supply daytime, through suppression controlling means control solar power system, the national electric wire netting is the dc-to-ac converter power supply daytime, the gravel and sand flows the back to evening, through the storage battery power supply of the other external solar cell panel of dc-to-ac converter, reduce energy consumption.
Description
Technical Field
The invention relates to the technical field of solar power generation, in particular to a night reactive power suppression control device for a string-type inverter of a distributed photovoltaic power station.
Background
Distributed photovoltaic plants generally refer to power generation systems deployed in the vicinity of users, with small installed scales, using decentralized resources, which are typically connected to a grid with voltage levels below 35 kv or lower. The distributed photovoltaic power station refers in particular to a distributed photovoltaic power station system which adopts photovoltaic components and directly converts solar energy into electric energy. The distributed photovoltaic power station system which is most widely applied is a photovoltaic power generation project built on the roof of an urban building. The project has to be accessed to the public power grid, and the project and the public power grid supply power for nearby users. If the public power grid is not supported, the distributed system cannot ensure the power utilization reliability and the power utilization quality of the user and output power is relatively small. Traditional centralized power stations often have hundreds of thousands of kilowatts, even millions of kilowatts, and the large-scale application improves the economy of the power stations. The size of the photovoltaic power generation module is determined by the modular design of the photovoltaic power generation module, and the capacity of a photovoltaic system can be adjusted according to the requirements of a site. Typically, the capacity of a distributed photovoltaic power plant project is within thousands of kilowatts. Different from a centralized power station, the size of the photovoltaic power station has little influence on the power generation efficiency, so that the economic influence is also little, and the investment yield of a small photovoltaic system is not lower than that of a large photovoltaic system. The distributed photovoltaic power station project has no noise and can not pollute air and water in the power generation process. The local power utilization tension can be relieved to a certain extent. The distributed photovoltaic power station has the highest output in the daytime, and the demand of people on electric power is the largest just in the time period. However, the energy density of the distributed photovoltaic power station is relatively low, the power of the distributed photovoltaic power station system per square meter is only about 100 watts, and the roof area of a building suitable for installing photovoltaic components is limited, so that the problem of power shortage cannot be fundamentally solved by the distributed photovoltaic power station.
The inverter is also called a power supply regulator, and can be divided into an independent power supply and a grid connection according to the application of the inverter in a photovoltaic power generation system. According to the waveform modulation mode, the inverter can be divided into a square wave inverter, a step wave inverter, a sine wave inverter and a combined three-phase inverter. As for inverters used for grid-connected systems, there are transformer type inverters and non-transformer type inverters according to the presence or absence of a transformer. Generally, a process of converting ac power into dc power is called rectification, a circuit that performs a rectification function is called a rectifier circuit, and a device that performs a rectification process is called a rectifying device or a rectifier. Correspondingly, the process of converting direct current electric energy into alternating current electric energy is called inversion, a circuit which completes the inversion function is called an inversion circuit, and a device which realizes the inversion process is called inversion equipment or an inverter. In particular, in a solar power generation system, the level of inverter efficiency is an important factor for determining the capacity of a solar cell and the capacity of a storage battery.
With the rapid increase of installed capacity of the distributed photovoltaic power station, the string-type inverter is applied on a large scale as a master model of the distributed photovoltaic power station. The generated energy of the distributed photovoltaic power station is preferentially matched with the load of a factory owner, and a grid-connected access mode of spontaneously and automatically using surplus power to surf the internet is adopted to form dual-power supply with a power supply line of a national network. In the long-term use process, the phenomenon that the photovoltaic installation power generation capacity is not matched with the power load of a factory owner appears, and the photovoltaic installation power generation capacity is far greater than the actual power consumption of the factory owner. The load of a factory in the daytime completely uses photovoltaic power generation, the load operation time is short or even the power is stopped at night, and the accumulation of the active electric quantity of the metering ammeter is mainly formed by photovoltaic and night no-load loss of an owner transformer. Photovoltaic power generation is reversely connected to the internet in the daytime, the reactive power is not brought into the reactive power total calculation of the electric charge, the photovoltaic power generation is stopped at night, the factory load/transformer loss is obtained from the national power grid, and the reactive power is brought into the reactive power total calculation of the electric charge in the stage. Therefore, the inverter supplies power through a national power grid when working at night, energy consumption of the inverter when working is removed, other devices with lower attached power also supply power through the national power grid, the whole photovoltaic module works at night for monitoring, if the photovoltaic module is loaded by the national power grid, an active power accumulation is formed by a metering ammeter at the moment, loss in the process is usually obtained from the national power grid, reactive power incorporation in the stage is realized, reactive power total calculation is carried out, however, no-load electrical equipment can be increased along with the increase of the scale of a power station after photovoltaic power station monitoring at night, the loss of the national power grid is additionally increased, the calculation is difficult, and the total energy consumption can be increased by additionally increasing additional monitoring equipment. Aiming at the problem, a night reactive power suppression control device for a string-type inverter of a distributed photovoltaic power station is designed.
Disclosure of Invention
The invention provides a distributed photovoltaic power station group string inverter night reactive power suppression control device based on the technical problems that after the existing photovoltaic power station is monitored at night, no-load electrical equipment is increased along with the increase of the scale of a power station, the loss of a national power grid is additionally increased, the calculation is difficult to obtain, and the increase of additional monitoring equipment increases the overall energy consumption.
The invention provides a night reactive power suppression control device for a string-type inverter of a distributed photovoltaic power station, which comprises a box body and a solar cell panel, wherein the solar cell panel is fixedly arranged on one surface of the box body;
the inner surface of the fixing ring is fixedly sleeved with a delay barrel, a mechanical delay device is arranged in the delay barrel and comprises a delay block, a first initial hole is formed in the peripheral side surface of the delay barrel, a trigger rope is movably sleeved in the first initial hole, an anti-overflow device is arranged in the first initial hole and comprises a limiting groove, a trigger device is arranged on the inner wall of the other side of the box body, and the trigger device comprises a supporting plate;
the overflow preventing device is located the inner wall of the time delay barrel to prevent the outflow of substances inside the overflow preventing device and prevent the driving of the mechanical time delay device through the trigger rope, the mechanical time delay device realizes the power supply of the storage battery through the solar cell panel at night by pulling out the trigger rope with one end located in the time delay block, the trigger motor is started in the starting process of the mechanical time delay device and drives the time delay barrel to rotate through the motor to realize the reset, the trigger device is started when the mechanical time delay device resets, and the energy consumption of the equipment to the power grid is reduced by the power supply of the storage battery through the trigger device located on one side of the mechanical time delay device to start the solar cell panel.
Preferably, the surface of one side of the fixing ring is fixedly provided with a fixing bolt, the fixing bolt is of an H-shaped structure, and the peripheral side face of the fixing bolt is wound with a traction rope.
Preferably, the time delay piece is the cylinder structure and cup joints with time delay section of thick bamboo inner wall intermediate position is fixed, time delay hole has been seted up on time delay piece one surface, the time delay hole is hourglass type structure, time delay piece top is provided with first slider, first slider week side is cup jointed with time delay section of thick bamboo inner wall activity, it has gravel and sand to fill between first slider and the time delay piece, first slider one end fixed mounting has the mount.
Preferably, the mount is U type structure, mount one end week side cup joints with a time delay section of thick bamboo one end surface activity, mount other end fixed mounting has first extrusion piece, fixed surface installs the second extrusion piece on the mount U type structure depressed part, second extrusion piece below is provided with first starting switch, first starting switch and box inner wall fixed connection, first starting switch's electrode respectively with the electrode of motor and the electrode electric connection of the switch that closes of solar cell panel's battery.
Preferably, a second sliding block is arranged below the delay block, the peripheral side surface of the second sliding block is movably sleeved with the inner wall of the delay cylinder, the first sliding block and the second sliding block are made of lead metal sliding blocks, and a third extrusion block is fixedly mounted at one end of the second sliding block.
Preferably, the third extrusion block is located below the second slider, a second starting switch is arranged below the third extrusion block, an electrode of the second starting switch is electrically connected with an electrode of the motor, and the second starting switch is fixedly connected with the bottom wall of the delay cylinder.
Preferably, the first starting hole is communicated with the inside of the delay cylinder, a second starting hole is formed in the opposite surface of the first starting hole, the second starting hole is formed in the inner wall of the box body, the peripheral side face of one end of the trigger rope is movably sleeved with the inner wall of the second starting hole, the horizontal plane of one end of the trigger rope is higher than the horizontal plane of one end of the second starting hole, and the other end of the trigger rope is movably sleeved with the inner wall of the delay cylinder.
Preferably, the limiting groove is opened on the inner walls of two sides of the first starting hole, the inner wall of the limiting groove is fixedly provided with a first spring, one end of the first spring is fixedly provided with a limiting plate, and the two adjacent ends of the limiting plate are in close contact with each other to form a circular shape and form a seal with the inner wall of the first starting hole.
Preferably, the supporting plate is of a concave structure, the triggering rod is movably sleeved on the bottom wall in the supporting plate, a hinged plate is arranged on the surface of one end of the supporting plate and located under the first extrusion block, one end of the hinged plate is fixedly connected with one end of the traction rope, and the horizontal plane at one end of the triggering rod is higher than the surface of one end of the supporting plate and hinged to the inner wall of the other end of the hinged plate through a pin shaft.
Preferably, the trigger bar is T type structure, the winding of trigger bar week side has the second spring, the second spring is damping spring, diapire fixed connection and the other end and trigger bar other end fixed connection in the one end of second spring and the backup pad, the positive opposite third starting switch that is provided with of trigger bar one end, the electrode of third starting switch and the electrode electric connection of the opening switch of solar cell panel's battery.
The beneficial effects of the invention are as follows:
1. by arranging the mechanical delay device, a delay hole is formed in one surface of the delay block, a first slide block is arranged above the delay block, the peripheral side surface of the first slide block is movably sleeved with the inner wall of the delay cylinder, sand and stone are filled between the first slide block and the delay block, a fixing frame is fixedly arranged at one end of the first slide block, the purpose that the first slide block loses the support of the sand and stone and moves downwards and slowly along the inner wall of the delay cylinder when the sand and stone flows down through the delay hole is achieved, the second slide block is extruded by the sand and stone and moves downwards along the inner wall of the delay cylinder synchronously with the first slide block, the time when the sand and stone completely flow into the delay block is the time when a solar power generation system of a photovoltaic power station and a national power grid supply an inverter in daytime, the night is realized after the sand and stone flow out, so that a starting switch of a storage battery of the solar panel is triggered by the trigger device, the storage battery of the solar panel supplies power to the inverter, and the mechanical delay device delays the storage battery to supply the inverter, the inverter is powered off by other power supply systems at night, and the inverter is powered by the storage battery, so that the energy consumption is reduced, and the problems that after the existing photovoltaic power station is monitored at night, no-load electrical equipment can be increased along with the increase of the scale of the power station, the loss of a national power grid is additionally increased, the calculation is difficult, and the total energy consumption is increased by adding additional monitoring equipment are solved.
2. Through setting up the anti-overflow device, spacing groove inner wall fixed mounting has first spring, first spring one end fixed mounting has the limiting plate, two adjacent limiting plate one end in close contact with constitute circular form and constitute sealedly with first initial hole inner wall, the elasticity extrusion limiting plate through first spring has been reached, two limiting plate mutual displacement just constitute sealedly with first initial hole inner wall, prevent that gravel and sand from overflowing from first initial downthehole, the leakproofness of a time delay section of thick bamboo has been guaranteed, make the more accurate purpose of mechanical time delay device, thereby solved gravel and sand in the time delay section of thick bamboo and overflowed through first initial hole easily, influence the problem of mechanical time delay device accuracy.
3. By arranging the trigger device, the peripheral side surface of the trigger rod is wound with a second spring, one end of the second spring is fixedly connected with the inner bottom wall of the support plate, the other end of the second spring is fixedly connected with the other end of the trigger rod, a third starting switch is arranged opposite to one end of the trigger rod, the electrode of the third starting switch is electrically connected with the electrode of the starting switch of the storage battery of the solar battery panel, the hinged plate is contacted with the surface of one end of the support plate by the extrusion surface, the movement of the inner bottom wall of the support plate at one end of the trigger rod is influenced by the elastic force of the second spring, the other end of the trigger rod moves towards the inner wall at one side of the box body, the third starting switch of the storage battery of the solar battery panel is extruded by one end of the trigger rod, and the starting switch of the storage battery of the solar battery panel is started by the third starting switch, so that the switch of the inverter supplied by the solar power generation system and the switch of the inverter supplied by national power grid are closed, the battery through solar cell panel is the inverter power supply, daytime, through restraining controlling means control solar power system, the national grid is the inverter power supply daytime, evening through the additional external solar cell panel's of inverter battery power supply, reduce energy consumption's purpose, thereby it can increase along with the scale increase of power station to have solved current photovoltaic power plant night monitoring back unloaded electrical equipment, additionally increase the loss of national grid and hardly calculate and draw, it can increase the problem of whole power consumption to increase extra monitoring facilities.
Drawings
Fig. 1 is a schematic diagram of a distributed photovoltaic power station string inverter night reactive power suppression control device according to the present invention;
fig. 2 is a front view of a box structure of a distributed photovoltaic power station string inverter night reactive suppression control device provided by the invention;
fig. 3 is a sectional view of a box structure of a distributed photovoltaic power station string inverter night reactive power suppression control device provided by the invention;
fig. 4 is an enlarged view of a structure at a point a in fig. 3 of the distributed photovoltaic power station string inverter night reactive power suppression control device according to the present invention;
fig. 5 is an enlarged structural view of a point B in fig. 3 of the night reactive suppression control device for the string-type inverter of the distributed photovoltaic power station group according to the present invention;
fig. 6 is a perspective view of a delay cylinder structure of a distributed photovoltaic power station string inverter night reactive suppression control device according to the present invention;
fig. 7 is a perspective view of a supporting plate structure of a distributed photovoltaic power station string inverter night reactive power suppression control device according to the present invention;
fig. 8 is a system block diagram of a distributed photovoltaic power station string inverter night reactive power suppression control device provided by the invention.
In the figure: 1. a box body; 2. a solar panel; 3. a motor; 4. a drive shaft; 5. a fixing ring; 501. a fixing bolt; 502. a hauling rope; 6. a delay cylinder; 7. a delay block; 701. a delay hole; 702. a first slider; 703. a fixed mount; 704. a first extrusion block; 705. a second extrusion block; 706. a first start switch; 707. a second slider; 708. a third extrusion block; 709. a second start switch; 8. a first start hole; 9. a trigger cord; 10. a limiting groove; 101. a second starter hole; 102. a first spring; 103. a limiting plate; 11. a support plate; 111. a trigger lever; 112. a hinge plate; 113. a second spring; 114. and a third start switch.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments.
Referring to fig. 1-8, a distributed photovoltaic power station group string inverter night reactive suppression control device comprises a box body 1 and a solar cell panel 2, wherein the solar cell panel 2 is fixedly installed on one surface of the box body 1, a storage battery of the solar cell panel 2 is arranged in the box body 1, a motor 3 is fixedly installed on the inner wall of one side of the box body 1, one end of the motor 3 is fixedly provided with a driving shaft 4 through a rotating shaft, and one end of the driving shaft 4 is fixedly provided with a fixing ring 5;
furthermore, a fixing bolt 501 is fixedly installed on one side surface of the fixing ring 5, the fixing bolt 501 is of an H-shaped structure, and a traction rope 502 is wound around the peripheral side surface of the fixing bolt 501.
A delay cylinder 6 is fixedly sleeved on the inner surface of the fixed ring 5, a mechanical delay device is arranged in the delay cylinder 6, and the mechanical delay device comprises a delay block 7;
furthermore, the delay block 7 is of a cylinder structure and is fixedly sleeved with the middle position of the inner wall of the delay cylinder 6, a delay hole 701 is formed in one surface of the delay block 7, the delay hole 701 is of a hourglass-shaped structure, a first sliding block 702 is arranged above the delay block 7, the peripheral side face of the first sliding block 702 is movably sleeved with the inner wall of the delay cylinder 6, sand and stones are filled between the first sliding block 702 and the delay block 7, and a fixing frame 703 is fixedly installed at one end of the first sliding block 702.
Further, the fixing frame 703 is of a U-shaped structure, a peripheral side surface of one end of the fixing frame 703 is movably sleeved with a surface of one end of the delay tube 6, a first extrusion block 704 is fixedly installed at the other end of the fixing frame 703, a second extrusion block 705 is fixedly installed on an upper surface of a concave portion of the U-shaped structure of the fixing frame 703, a first starting switch 706 is arranged below the second extrusion block 705, the first starting switch 706 is fixedly connected with an inner bottom wall of the box body 1, and an electrode of the first starting switch 706 is electrically connected with an electrode of the motor 3 and an electrode of a closing switch of the storage battery of the solar panel 2 respectively.
Furthermore, a second sliding block 707 is arranged below the delay block 7, the peripheral side surface of the second sliding block 707 is movably sleeved with the inner wall of the delay cylinder 6, the first sliding block 702 and the second sliding block 707 are made of lead metal sliding blocks, and a third extrusion block 708 is fixedly mounted at one end of the second sliding block 707.
Further, a third pressing block 708 is located below the second sliding block 707, a second start switch 709 is disposed below the third pressing block 708, an electrode of the second start switch 709 is electrically connected with an electrode of the motor 3, and the second start switch 709 is fixedly connected with the inner bottom wall of the delay cylinder 6.
By arranging the mechanical delay device, a delay hole 701 is arranged on one surface of the delay block 7, a first slide block 702 is arranged above the delay block 7, the peripheral side surface of the first slide block 702 is movably sleeved with the inner wall of the delay cylinder 6, sand and stone are filled between the first slide block 702 and the delay block 7, a fixing frame 703 is fixedly arranged at one end of the first slide block 702, the first slide block 702 loses the support of the sand and stone and moves downwards along the inner wall of the delay cylinder 6 when the sand and stone flows down through the delay hole 701, a second slide block 707 moves downwards along the inner wall of the delay cylinder 6 synchronously with the first slide block 702 under the extrusion of the sand and stone, the time when the sand and stone completely flow into the delay block 7 is the time when a solar power generation system of a photovoltaic power station and a national power grid supply an inverter in the daytime, the time is night after the sand and stone completely flows out, so that a trigger device triggers a starting switch of a storage battery of the solar panel 2 to supply the inverter through the storage battery of the solar panel 2, the mechanical time delay device delays the power supply of the storage battery to the inverter, closes the power supply of other power supply systems to the inverter at night, and reduces the energy consumption by supplying power to the inverter through the storage battery, so that the problems that after the existing photovoltaic power station is monitored at night, no-load electrical equipment can be increased along with the increase of the scale of the power station, the loss of a national power grid is additionally increased, the calculation is difficult, and the total energy consumption can be increased by additionally adding monitoring equipment are solved.
A first starting hole 8 is formed in the peripheral side surface of the delay tube 6, and a trigger rope 9 is movably sleeved in the first starting hole 8;
further, first originated hole 8 and the inside intercommunication of a time delay section of thick bamboo 6, the relative surface of first originated hole 8 is provided with the originated hole of second 101, and the originated hole of second 101 is seted up at 1 inner wall of box, triggers 9 one end week sides of rope and the activity of the originated hole of second 101 inner walls and cup joints and one end horizontal plane is higher than the originated hole of second 101 one end horizontal plane, triggers 9 other ends of rope and the activity of time delay hole 701 inner walls and cup joints.
An anti-overflow device is arranged in the first starting hole 8 and comprises a limiting groove 10;
further, the limiting grooves 10 are formed in inner walls of two sides of the first starting hole 8, the first springs 102 are fixedly mounted on the inner walls of the limiting grooves 10, one ends of the first springs 102 are fixedly mounted with the limiting plates 103, and one ends of the two adjacent limiting plates 103 are in close contact to form a circular shape and form a seal with the inner walls of the first starting hole 8.
Through setting up the anti-overflow device, 10 inner wall fixed mounting of spacing groove have first spring 102, first spring 102 one end fixed mounting has limiting plate 103, two adjacent limiting plate 103 one end in close contact with constitute circular form and constitute sealedly with first originated hole 8 inner wall, elastic force extrusion limiting plate 103 through first spring 102 has been reached, two limiting plate 103 mutual displacement just constitute sealedly with first originated hole 8 inner wall, prevent that gravel and sand from spilling over in the first originated hole 8, the leakproofness of a time delay section of thick bamboo 6 has been guaranteed, make the more accurate purpose of mechanical time delay device, thereby solved the gravel and sand in the time delay section of thick bamboo 6 and overflowed through first originated hole easily, influence the problem of mechanical time delay device accuracy.
The inner wall of the other side of the box body 1 is provided with a trigger device, and the trigger device comprises a supporting plate 11;
furthermore, the supporting plate 11 is of a concave structure, the inner bottom wall of the supporting plate 11 is movably sleeved with the triggering rod 111, a hinge plate 112 is arranged on the surface of one end of the supporting plate 11, the hinge plate 112 is located under the first pressing block 704, one end of the hinge plate 112 is fixedly connected with one end of the pulling rope 502, and the horizontal plane of one end of the triggering rod 111 is higher than the surface of one end of the supporting plate 11 and is hinged with the inner wall of the other end of the hinge plate 112 through a pin shaft.
Further, the trigger bar 111 is of a T-shaped structure, a second spring 113 is wound around the peripheral side surface of the trigger bar 111, the second spring 113 is a damping spring, one end of the second spring 113 is fixedly connected to the bottom wall of the support plate 11, the other end of the second spring is fixedly connected to the other end of the trigger bar 111, a third start switch 114 is arranged opposite to one end of the trigger bar 111, and an electrode of the third start switch 114 is electrically connected to an electrode of a start switch of a storage battery of the solar cell panel 2.
The anti-overflow device is located 6 inner walls of a time delay section of thick bamboo and prevents that its inside material from flowing and prevent the drive of mechanical delay device through triggering rope 9, thereby mechanical delay device is through pulling out the trigger rope 9 that one end is located delay block 7 and start the battery power supply that realizes passing through solar cell panel 2 night, thereby trigger motor 3 and drive a time delay section of thick bamboo 6 through motor 3 and rotate the realization and reset in the mechanical delay device start-up process, thereby start trigger device and start the battery power supply of solar cell panel 2 through the trigger device that is located mechanical delay device one side when mechanical delay device resets and reduce the power consumption of equipment to the electric wire netting.
By arranging the trigger device, the second spring 113 is wound on the peripheral side surface of the trigger rod 111, one end of the second spring 113 is fixedly connected with the inner bottom wall of the support plate 11, the other end of the second spring 113 is fixedly connected with the other end of the trigger rod 111, the third starting switch 114 is arranged opposite to one end of the trigger rod 111, the electrode of the third starting switch 114 is electrically connected with the electrode of the starting switch of the storage battery of the solar cell panel 2, the surface of the hinged plate 112 which is pressed by the pressing surface is contacted with one end surface of the support plate 11, the inner bottom wall of the support plate 11 at one end of the trigger rod 111 moves under the influence of the elastic force of the second spring 113, the other end of the trigger rod 111 moves towards the inner wall of one side of the box body 1, the third starting switch 114 is pressed by one end of the trigger rod 111, the starting switch of the storage battery of the solar cell panel 2 is started by the third starting switch 114, and the switch of the inverter which is supplied by the solar power generation system and the national power grid is closed, the battery through solar cell panel 2 is the dc-to-ac converter power supply, daytime, through restraining controlling means control solar electric system, the national electric wire netting is the dc-to-ac converter power supply daytime, through the other external solar cell panel 2's of dc-to-ac converter battery power supply evening, reduce energy consumption's purpose, thereby it can increase along with the increase of the scale in power station to have solved current photovoltaic power plant monitoring back no-load electrical equipment night, the loss that additionally increases the national electric wire netting just hardly calculates and draws, it can increase the problem of total power consumption to increase extra monitoring facilities.
The working principle is as follows:
the inverter supplies power to a national power grid through a solar power generation system of a photovoltaic power station in the daytime, meanwhile, a switch of the inverter, which is supplied by the solar power generation system, is electrically connected with a switch of the national power grid, which is supplied by the national power grid, and is controlled by the switch, a closing switch of the switch is electrically connected with an opening switch of a storage battery of the solar cell panel 2, and a starting switch of the switch is electrically connected with a closing switch of the storage battery of the solar cell panel 2;
one end of a trigger rope 9 exposed out of the outer wall of the box body 1 is pulled outwards, the trigger rope 9 is pulled out from a delay hole 701, a first starting hole 8 and a second starting hole 101 in sequence, meanwhile, a limit plate 103 is extruded by the elastic force of a first spring 102, the two limit plates 103 move mutually and form a seal with the inner wall of the first starting hole 8, sand and stone are prevented from overflowing from the first starting hole 8, sand and stone in the delay cylinder 6 and above a delay block 7 flows out to the lower part of the delay block 7 through the delay hole 701, the sand and stone are in contact with a second sliding block 707, the first sliding block 702 loses the support of the sand and stone and slowly moves downwards along the inner wall of the delay cylinder 6 when the sand and stone flow down, the second sliding block 707 is extruded by the sand and moves downwards along the inner wall of the delay cylinder 6 synchronously with the first sliding block 702, and the time when the sand and stone completely flow into the delay block 7 is the time for supplying power for the inverter by the photovoltaic solar power generation system and the national power grid in the daytime, the night is after the sand and stone flow out, at the moment, the first extrusion block 704 at one end of the fixing frame 703 is in contact with the hinged plate 112 and extrudes the hinged plate 112 downwards, the surface of the hinged plate 112 which is extruded is in contact with the surface of one end of the supporting plate 11, the elastic force of the second spring 113 influences the movement of the bottom wall of the supporting plate 11 at one end of the trigger rod 111, the other end of the trigger rod 111 moves towards the inner wall of one side of the box body 1, the third starting switch 114 is extruded through one end of the trigger rod 111, the starting switch of the storage battery of the solar cell panel 2 is started through the third starting switch 114, so that the switch of the inverter which is powered by the solar power generation system and the closing switch of the inverter which is powered by the national power grid are closed, and the inverter is powered by the storage battery of the solar cell panel 2;
meanwhile, the second sliding block 707 moves downwards to trigger the second starting switch 709 through the third extrusion block 708, the second starting switch 709 drives the motor 3 to rotate forwards for 180 degrees, the delay cylinder 6 is driven to rotate for 180 degrees, meanwhile, the traction rope 502 is tightened and wound through the fixing bolt 501, the other end of the traction rope 502 is pulled to pull one end of the hinged plate 112 towards the inner wall direction of the other side of the box body 1, the trigger rod 111 is reset, at the moment, the first sliding block 702 is located below the second sliding block 707, sand flows downwards through the delay hole 701, the first sliding block 702 is extruded downwards, the process is that the inverter is powered through the storage battery of the solar panel 2 at night, the second extrusion block 705 triggers the first starting switch 706 after the sand flows out, the delay cylinder 6 is driven to rotate for 180 degrees reversely by the trigger motor 3, the traction rope 502 is loosened through the rotation of the fixing bolt 501, meanwhile, the closing switch of the storage battery of the solar panel 2 is triggered, the closing switch is driven, and simultaneously, the switch driving is triggered, the solar power generation system is powered to supply power to the switch and the national power grid power supply to the inverter The starting switch of the inverter is turned off, the storage battery of the solar cell panel 2 is turned off to supply power to the inverter by the closing switch, and the switch of the solar power generation system and the national grid inverter is turned on;
after the delay cylinder 6 turns, the first sliding block 702 is positioned above the second sliding block 707 to complete resetting, and in the daytime, the suppression control device controls the solar power generation system and the national power grid to supply power to the inverter in the daytime and supplies power to the storage battery of the solar cell panel 2 externally connected with the inverter at night, so that the energy consumption is reduced.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and the technical solutions and the inventive concepts thereof according to the present invention should be equivalent or changed within the scope of the present invention.
Claims (10)
1. The utility model provides a distributing type photovoltaic power plant group string inverter reactive suppression controlling means at night, includes box (1), solar cell panel (2), its characterized in that: the solar cell panel (2) is fixedly arranged on one surface of the box body (1), a storage battery of the solar cell panel (2) is arranged in the box body (1), a motor (3) is fixedly arranged on the inner wall of one side of the box body (1), one end of the motor (3) is fixedly provided with a driving shaft (4) through a rotating shaft, and one end of the driving shaft (4) is fixedly provided with a fixing ring (5);
a delay tube (6) is fixedly sleeved on the inner surface of the fixing ring (5), a mechanical delay device is arranged in the delay tube (6) and comprises a delay block (7), a first starting hole (8) is formed in the peripheral side surface of the delay tube (6), a trigger rope (9) is movably sleeved in the first starting hole (8), an anti-overflow device is arranged in the first starting hole (8) and comprises a limiting groove (10), a trigger device is arranged on the inner wall of the other side of the box body (1), and the trigger device comprises a supporting plate (11);
the anti-overflow device is located a delay section of thick bamboo (6) inner wall and prevents that its inside material from flowing and prevent mechanical delay device drive through triggering rope (9), thereby mechanical delay device realizes the battery power supply through solar cell panel (2) night through pulling out trigger rope (9) that one end is located delay piece (7) to start, thereby trigger motor (3) and drive a delay section of thick bamboo (6) through motor (3) and rotate and realize resetting in the mechanical delay device start-up process, thereby start trigger device and start the battery power supply of solar cell panel (2) through the trigger device that is located mechanical delay device one side when mechanical delay device resets and reduce the power consumption of equipment to the electric wire netting.
2. The distributed photovoltaic power plant string inverter night reactive power suppression control device of claim 1, wherein: the surface of one side of the fixing ring (5) is fixedly provided with a fixing bolt (501), the fixing bolt (501) is of an H-shaped structure, and the peripheral side of the fixing bolt (501) is wound with a traction rope (502).
3. The distributed photovoltaic power plant string inverter night reactive power suppression control device of claim 1, wherein: the time delay piece (7) is the cylinder structure and cup joints with time delay section of thick bamboo (6) inner wall intermediate position is fixed, time delay hole (701) have been seted up on time delay piece (7) surface, time delay hole (701) are hourglass type structure, time delay piece (7) top is provided with first slider (702), first slider (702) week side is cup jointed with time delay section of thick bamboo (6) inner wall activity, it has the gravel and sand to fill between first slider (702) and time delay piece (7), first slider (702) one end fixed mounting has mount (703).
4. The distributed photovoltaic power plant string inverter night reactive power suppression control device of claim 3, wherein: the solar energy water heater is characterized in that the fixing frame (703) is of a U-shaped structure, the peripheral side face of one end of the fixing frame (703) is movably sleeved with one end surface of the delay cylinder (6), a first extrusion block (704) is fixedly mounted at the other end of the fixing frame (703), a second extrusion block (705) is fixedly mounted on the upper surface of a concave position of the U-shaped structure of the fixing frame (703), a first starting switch (706) is arranged below the second extrusion block (705), the first starting switch 706 is fixedly connected with the inner bottom wall of the box body 1, and the electrode of the first starting switch (706) is electrically connected with the electrode of the motor (3) and the electrode of the closing switch of the storage battery of the solar panel (2) respectively.
5. The distributed photovoltaic power plant string inverter night reactive power suppression control device of claim 3, wherein: a second sliding block (707) is arranged below the delay block (7), the peripheral side surface of the second sliding block (707) is movably sleeved with the inner wall of the delay barrel (6), the first sliding block (702) and the second sliding block (707) are made of lead metal sliding blocks, and a third extrusion block (708) is fixedly arranged at one end of the second sliding block (707).
6. The distributed photovoltaic power plant string inverter night reactive power suppression control device of claim 5, wherein: the third extrusion block (708) is located below the second sliding block (707), a second starting switch (709) is arranged below the third extrusion block (708), an electrode of the second starting switch (709) is electrically connected with an electrode of the motor (3), and the second starting switch (709) is fixedly connected with the inner bottom wall of the delay cylinder (6).
7. The distributed photovoltaic power plant string inverter night reactive power suppression control device of claim 3, wherein: first originated hole (8) with the inside intercommunication of a time delay section of thick bamboo (6), first originated hole (8) relative surface is provided with second originated hole (101), the box (1) inner wall is seted up in second originated hole (101), trigger rope (9) one end week side and the activity of second originated hole (101) inner wall cup joint and one end horizontal plane is higher than the activity of second originated hole (101) one end horizontal plane, trigger rope (9) other end and time delay hole (701) inner wall activity cup joint.
8. The distributed photovoltaic power plant string inverter night reactive power suppression control device of claim 1, wherein: spacing groove (10) all set up first initial hole (8) both sides inner wall, spacing groove (10) inner wall fixed mounting has first spring (102), first spring (102) one end fixed mounting has limiting plate (103), and is two adjacent limiting plate (103) one end in close contact with constitutes circular form and constitutes sealedly with first initial hole (8) inner wall.
9. The distributed photovoltaic power plant string inverter night reactive power suppression control device of claim 4, wherein: the novel plastic extruding machine is characterized in that the supporting plate (11) is of a concave structure, the triggering rod (111) is movably sleeved on the inner bottom wall of the supporting plate (11), a hinged plate (112) is arranged on the surface of one end of the supporting plate (11), the hinged plate (112) is located under the first extruding block (704), one end of the hinged plate (112) is fixedly connected with one end of the traction rope (502), and the horizontal plane of one end of the triggering rod (111) is higher than the surface of one end of the supporting plate (11) and is hinged to the inner wall of the other end of the hinged plate (112) through a pin shaft.
10. The distributed photovoltaic power plant string inverter night reactive power suppression control device of claim 9, wherein: trigger bar (111) are T type structure, the winding of trigger bar (111) week side has second spring (113), second spring (113) are damping spring, bottom wall fixed connection and the other end and trigger bar (111) other end fixed connection in the one end of second spring (113) and backup pad (11), trigger bar (111) one end is provided with third starting switch (114) just face to face, the electrode of third starting switch (114) and the electrode electric connection of the starting switch of the battery of solar cell panel (2).
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110121965.6A CN112768268B (en) | 2021-01-28 | 2021-01-28 | Night reactive power suppression control device for string-type inverter of distributed photovoltaic power station |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202110121965.6A CN112768268B (en) | 2021-01-28 | 2021-01-28 | Night reactive power suppression control device for string-type inverter of distributed photovoltaic power station |
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| CN112768268B true CN112768268B (en) | 2022-05-20 |
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| CN204497750U (en) * | 2015-04-20 | 2015-07-22 | 青岛艾迪森科技有限公司 | The energy output optimization system of photovoltaic plant |
| CN204900161U (en) * | 2015-09-02 | 2015-12-23 | 张桂臣 | Boats and ships scene stores up wave energy and uses multipurposely power generation facility |
| AU2016338999B2 (en) * | 2015-10-13 | 2021-03-18 | Premier Energy Holdings, Inc. | Variable speed maximum power point tracking, solar electric motor controller for induction and permanent magnet AC motors |
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