CN218415816U - Special combination formula surge protector of intelligent monitoring photovoltaic - Google Patents

Special combination formula surge protector of intelligent monitoring photovoltaic Download PDF

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Publication number
CN218415816U
CN218415816U CN202222270845.5U CN202222270845U CN218415816U CN 218415816 U CN218415816 U CN 218415816U CN 202222270845 U CN202222270845 U CN 202222270845U CN 218415816 U CN218415816 U CN 218415816U
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China
Prior art keywords
surge protector
surge
intelligent monitoring
protectors
photovoltaic
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CN202222270845.5U
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Chinese (zh)
Inventor
田博
刘森
周莹莹
张殿辉
田哲
向峥
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Tianjin Cement Industry Design and Research Institute Co Ltd
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Tianjin Cement Industry Design and Research Institute Co Ltd
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Abstract

The utility model discloses a special combined surge protector for intelligent monitoring photovoltaic, belonging to the technical field of surge protectors and characterized in that the combined surge protector comprises a surge protector group; wherein: the surge protector group comprises M surge protectors connected in parallel, wherein M is a natural number larger than 1; one ends of the M surge protectors are in short circuit connection, the other ends of the M surge protectors are respectively connected with the phase line and the ground line, and the phase line and the ground line of each path of the surge protector group are connected in series through two surge protectors; the surge protector group is connected with the intelligent monitoring terminal, and the intelligent monitoring terminal is communicated with the background through the RS485 bus. This application improves surge protector's whole turn-on voltage through increasing outside series structure to satisfy high voltage photovoltaic case and become surge protector's user demand. Meanwhile, an intelligent monitoring terminal is arranged to monitor the degradation state, the overcurrent protection state and the action times of the surge protector in real time and transmit the degradation state, the overcurrent protection state and the action times to a background through RS485 communication.

Description

Special combination formula surge protector of intelligent monitoring photovoltaic
Technical Field
The utility model belongs to the technical field of surge protector, especially, relate to a special combination formula surge protector of intelligent monitoring photovoltaic.
Background
The surge protector is used as a conventional product of an electric power system, is mature in various fields of power generation, power transmission, power distribution, power utilization and the like, is mainly of a switch type and a voltage limiting type, the switch type is a gap discharge type product, when overvoltage is lower than discharge voltage, the surge protector is completely insulated, and when the overvoltage is higher than the discharge voltage, the surge protector is completely conducted. The voltage-limiting type surge protector is a nonlinear zinc oxide resistor technology, voltage and current show a nonlinear resistance relation, and conduction voltage and resistor disc thickness show a linear proportional relation. The existing photovoltaic surge protector adopts a voltage-limiting surge protector, the realization mode of the photovoltaic system technology is increased, the maximum voltage of the photovoltaic system can reach 1500V, and the traditional surge protector is applied to 380V and 690V systems. The photovoltaic voltage is improved, the action voltage of the surge protector is correspondingly improved, the thickness of the zinc oxide resistance card is increased, but the zinc oxide resistance card adopted by a 1000V system is limited by the size of the shell of the surge protector, so that the requirement cannot be met. Simultaneously because photovoltaic system's voltage is higher and the mounted position is located positions such as roof, easily suffer the thunderbolt, surge protector exists risks such as overuse ageing, and the degradation state of traditional product, the condition such as thunderbolt number of times can not in time know and monitor.
SUMMERY OF THE UTILITY MODEL
To above technical defect, the utility model provides a special combination formula surge protector of intelligent monitoring photovoltaic adopts the zinc oxide resistance card of conventional voltage, conventional thickness, improves surge protector's whole turn-on voltage through increasing outside series structure to satisfy high-voltage photovoltaic case and become surge protector's user demand. Meanwhile, an intelligent monitoring terminal is arranged to monitor the degradation state, the overcurrent protection state and the action times of the surge protector in real time and transmit the degradation state, the overcurrent protection state and the action times to a background through RS485 communication.
In order to achieve the technical purpose, the utility model discloses a following technical scheme realizes:
a combined surge protector special for intelligent monitoring photovoltaic comprises a surge protector group; wherein: the surge protector group comprises M surge protectors connected in parallel, wherein M is a natural number larger than 1; one ends of the M surge protectors are in short circuit connection, the other ends of the M surge protectors are respectively connected with the phase line and the ground line, and the phase line and the ground line of each path of the surge protector group are connected in series through two surge protectors; the surge protector group is connected with the intelligent monitoring terminal, and the intelligent monitoring terminal is communicated with the background through the RS485 bus.
Preferably: the surge protector group comprises 4 surge protectors connected in parallel.
Preferably: the structural parameters of the 4 parallel surge protectors are the same.
Preferably: one end of M surge protectors connected in parallel is connected in a short circuit mode through a bus bar.
Preferably: the busbar is connected with the PE wire through the magnetic ring, and the intelligent monitoring is respectively connected with the busbar and the PE wire through the magnetic ring.
The utility model has the advantages and the technical effect be:
this novel surge protector is applicable to equipment and control system such as photovoltaic conflux case, dc-to-ac converter, alternating current-direct current cabinet, direct current cabinet in the photovoltaic power generation field, installs at the distribution system front end, can restrain its transient overvoltage amplitude to response thunder and operation overvoltage etc. and release surge energy, prevents that equipment from receiving overvoltage interference and lightning protection to protection system circuit and equipment.
Drawings
Fig. 1 is a schematic block diagram of the circuit of the present invention.
In the drawing, 1, a magnetic ring; 2. a surge protector group; 3. a bus bar; 4. intelligent monitoring terminal.
Detailed Description
In order to make the above objects, control system and advantages of the present invention more apparent, the present invention will be further described in detail with reference to the following embodiments. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the invention.
Please refer to fig. 1, a combined surge protection device dedicated for intelligent monitoring photovoltaic, which has an intelligent monitoring function, and still adopts a zinc oxide resistor disc with conventional voltage and conventional thickness, and improves the overall conducting voltage of the surge protection device by adding an external series structure, so as to meet the use requirement of the surge protection device dedicated for high-voltage photovoltaic box transformer substation. Meanwhile, an intelligent monitoring terminal is arranged to monitor the degradation state, the overcurrent protection state and the action times of the surge protector in real time and transmit the degradation state, the overcurrent protection state and the action times to a background through RS485 communication.
The technical scheme adopted for achieving the purpose is as follows: the combined surge protector special for intelligent monitoring photovoltaic comprises a surge protector group 2, wherein the surge protector group comprises a plurality of surge protectors connected in parallel; one ends of the plurality of surge protectors connected in parallel are in short circuit connection, the other ends of the plurality of surge protectors are respectively connected with the phase lines and the ground lines, and a series structure of the two surge protectors is arranged between each phase line and the ground line of the surge protector group. The surge protector group comprises 4 surge protectors connected in parallel. 4 parallelly connected surge protector have the same structural parameter, and 3 short circuit connection are passed through to a plurality of parallelly connected surge protector's one end, and the busbar passes through fastener and a plurality of parallelly connected surge protector's one end fixed connection. The bus bar is connected with the PE wire through a magnetic ring 1, and the intelligent monitoring is respectively connected with the bus bar and the PE wire through the magnetic ring; meanwhile, the surge protector group is connected with the intelligent monitoring terminal, the intelligent monitoring terminal 4 can judge the overcurrent protection state of the surge protector through electric signals, the lightning stroke action times are monitored in real time, the deterioration state of the protector can be judged and alarmed according to the monitoring result, a communication interface is designed, and related data can be transmitted to a background through RS485 communication, so that equipment maintenance and management are facilitated.
The working principle is as follows: compared with the prior art, this application is on the basis that does not change surge protector current structure, through a plurality of surge protector's that connect in parallel one end short-circuit connection, the other end connects a plurality of phase lines and ground wire respectively, make every path of phase line of surge protector group to the surge protector of ground convert two surge protector's series structure, the zinc oxide resistance card accords with the characteristic that the resistance is established ties the back voltage and is multiplied, the conduction voltage value half of having reduced every piece of surge protector, the mounting dimension that accords with the surge protector shell after the voltage requirement halving, thereby the unmatched problem of zinc oxide resistance card and surge protector shell mounting dimension has been solved. On the basis of not changing the shell size of the conventional surge protector, the conventional surge protector realizes the requirement of high voltage of a photovoltaic system, and simultaneously reduces the voltage value of the interphase surge protector, so that the interphase protection effect is better. In addition, through the setting of busbar safety cover, can effectually avoid the special surge protector of combination formula photovoltaic's the electrically conductive metalwork of one end that connects through the busbar exposes for a long time in the outside, and the potential safety hazard that arouses runs through and is fixed in the outside of busbar through the busbar safety cover from the side of busbar for the dismantlement of busbar safety cover is more convenient. Meanwhile, aiming at the application characteristics of the photovoltaic system, through the design of the intelligent monitoring terminal, the overvoltage problem of the induction lightning is continuously solved in the normal use of the surge protector, so that the conditions such as the product degradation state, the backup protection state, the lightning stroke frequency and the like can be monitored in real time, and the conditions can be transmitted to a specified terminal platform, and the purposes of reducing the accident risk and improving the maintenance management level are achieved.
The above description is only exemplary of the present invention and should not be construed as limiting the present invention, and any modifications, equivalents and improvements made within the spirit and principles of the present invention are intended to be included within the scope of the present invention.

Claims (5)

1. The combined surge protector special for intelligent monitoring of the photovoltaic is characterized by comprising a surge protector group; wherein: the surge protector group comprises M surge protectors connected in parallel, wherein M is a natural number larger than 1; one ends of the M surge protectors are in short circuit connection, the other ends of the M surge protectors are respectively connected with the phase line and the ground line, and the phase line and the ground line of each path of the surge protector group are connected in series through two surge protectors; the surge protector group is connected with the intelligent monitoring terminal, and the intelligent monitoring terminal is communicated with the background through the RS485 bus.
2. The intelligent monitoring special photovoltaic combined surge protector of claim 1, wherein: the surge protector group comprises 4 surge protectors connected in parallel.
3. The intelligent monitoring special photovoltaic combined surge protector of claim 2, wherein: the structural parameters of the 4 parallel surge protectors are the same.
4. The intelligent monitoring special photovoltaic combined surge protector of claim 1, wherein: one end of M surge protectors connected in parallel is connected in a short circuit mode through a bus bar.
5. The intelligent monitoring special photovoltaic combined surge protector of claim 4, wherein: the busbar is connected with the PE wire through the magnetic ring, and the intelligent monitoring is respectively connected with the busbar and the PE wire through the magnetic ring.
CN202222270845.5U 2022-08-26 2022-08-26 Special combination formula surge protector of intelligent monitoring photovoltaic Active CN218415816U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202222270845.5U CN218415816U (en) 2022-08-26 2022-08-26 Special combination formula surge protector of intelligent monitoring photovoltaic

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202222270845.5U CN218415816U (en) 2022-08-26 2022-08-26 Special combination formula surge protector of intelligent monitoring photovoltaic

Publications (1)

Publication Number Publication Date
CN218415816U true CN218415816U (en) 2023-01-31

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Family Applications (1)

Application Number Title Priority Date Filing Date
CN202222270845.5U Active CN218415816U (en) 2022-08-26 2022-08-26 Special combination formula surge protector of intelligent monitoring photovoltaic

Country Status (1)

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CN (1) CN218415816U (en)

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