CN209191727U - Contact net protection against lightning strikes device - Google Patents

Contact net protection against lightning strikes device Download PDF

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Publication number
CN209191727U
CN209191727U CN201821359157.3U CN201821359157U CN209191727U CN 209191727 U CN209191727 U CN 209191727U CN 201821359157 U CN201821359157 U CN 201821359157U CN 209191727 U CN209191727 U CN 209191727U
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China
Prior art keywords
contact net
voltage
super capacitor
transformer
inverter
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CN201821359157.3U
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Chinese (zh)
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潘政强
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潘政强
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Abstract

The utility model discloses a kind of contact net protection against lightning strikes devices, belong to power electronics field.PC application or industrial control computer COM control system are carried out detection super capacitor C both end voltage by voltage transmitter XT signal acquisition, the control signal of D.C. contactor KM1, inverter M are issued after processing operation;The investment current limliting and over-voltage energy release feedback contact net for realizing device eliminate the various overvoltage such as Lightning Over-voltage to reach device stable operation, and stable power-supplying system protects equipment and locomotive, the purpose for enhancing system reliability.

Description

Contact net protection against lightning strikes device
Technical field
The present invention relates to a kind of contact net protection against lightning strikes devices, belong to power electronics field.It is electrical for eliminating The Lightning Over-voltage and internal overvoltage for changing railway high-voltage contact net reach stable power-supplying system, protection locomotive and equipment, enhancing System reliability and other effects.
Background technique
High speed and heavy haul railway had obtained extensive development in China in recent years, and conevying efficiency has obtained greatly mentioning It is high.China's electric railway stretches from the north to the south across thing, and institute is multifarious through regional geography and climate, and situation is complicated, especially high Fast railway uses overpass form, and contact net becomes the opposite high point in zonule, so that its probability to suffer from mines increases Add, once easily causing the accidents such as insulation flashover fracture, line tripping by lightning stroke, will lead to withdrawal of train when serious, to railway Transport causes tremendous influence.Therefore, the lightning protection of contact net is to realize that electric railway is safe and stable, one uninterrupted power supply Important link.Statistics shows lightning protection measures to contact net route domestic at present and not perfect, because contact net due to lightning stroke by causing Damage to crops caused by thunder phenomenon happen occasionally, the especially section of damage to crops caused by thunder frequent activity.
At the same time, the traction power that locomotive needs is increasing, and impact and voltage fluctuation are also even more serious.And due to Tractive power supply system itself is three-phase asymmetric load, and electric locomotive is the load of mobile single-phase rectifier band impact, is generated big Harmonic wave, negative phase-sequence and the reactive power of amount, inject electric system, cause electric power quality to decline, can lead to when serious after Electrical protective device malfunction causes the accidents such as system resonance, overvoltage damage electrical equipment even large-area power-cuts.So electric energy Oneself warp of the decline of quality becomes China's Developing High-speed heavy haul railway and has to the problem of paying attention to.Electric railway overvoltage, electric power Continually to pass through non-Electric region in locomotive driving, by cut, close a floodgate in the locomotive of front and back, make the main transformer of locomotive every time It generates switching overvoltage and shoves.And the traction power that locomotive needs is increasing, impact and voltage fluctuation are also more Seriously.Again since tractive power supply system itself is three-phase asymmetric load, electric locomotive is that mobile single-phase rectifier band impacts Load generates a large amount of harmonic wave, negative phase-sequence and reactive power, injects electric system, causes electric power quality to decline, seriously When can lead to protective relaying device malfunction, cause system resonance, the overvoltage damage electrical equipment even accidents such as large-area power-cuts.
Summary of the invention
The technical problem to be solved in the present invention is to provide a kind of uninterrupted power supply Intelligent over voltage protective devices.It can supply The overvoltage protection installed on goddess of lightning's line, eliminating bus various types overvoltage makes Network Voltage Stability, can be to avoid confession The various failures such as electric equipment damage.
The technical problem to be solved in the present invention is to provide a kind of contact net protection against lightning strikes devices.It can power in contact net The overvoltage protection installed on route, eliminating contact net Lightning Over-voltage and other various types overvoltage keeps contact net electric Pressure is stablized, can be to avoid various failures such as power supply system failure, locomotive damages.
In order to solve the above-mentioned technical problem, contact net protection against lightning strikes that the present invention is achieved by the following technical solutions dress It sets, including high-voltage switch gear QF, transformer TK, rectifier diode D1, rectifier diode D2, current-limiting resistance R1, ac capacitor C1, super Grade capacitor C, D.C. contactor KM1, PC application, voltage transmitter XT, inverter M;The transformer TK primary side Winding accesses contact net by high-voltage switch gear QF;One group of winding both ends tap of transformer secondary meets rectifier diode D1, whole respectively Flow diode D2;Another group of winding access inverter M of transformer secondary exchanges end;Rectifier diode D1, rectifier diode D2 Negative terminal parallel connection is followed by current-limiting resistance R1;The contact D.C. contactor KM1 is connected to the both ends current-limiting resistance R1;Current-limiting resistance R1's is another One termination super capacitor C;The negative terminal of super capacitor C connects transformer TK vice-side winding centre cap;Ac capacitor C1 is connected to super The both ends of grade capacitor C;Inverter M DC terminal is connected to the both ends of super capacitor C;Voltage transmitter XT primary side is connected to super electricity Hold the both ends of C, secondary side signal accesses PC application;PC application control line is separately connected direct current and connects Tentaculum KM1, inverter M.The control system of the contact net protection against lightning strikes device uses PC application or work Control computer COM control system.
PC application or industrial control computer COM control system, by voltage transmitter XT signal acquisition come into Row detection super capacitor C both end voltage, issues the control signal of D.C. contactor KM1, inverter M after processing operation;It realizes Investment current limliting and over-voltage energy the release feedback contact net of device eliminate Lightning Over-voltage etc. to reach device stable operation Various overvoltage, stable power-supplying system, protection equipment and locomotive, the purpose for enhancing system reliability.
Detailed description of the invention
Attached drawing 1 is the main circuit diagram of contact net protection against lightning strikes device.
Specific embodiment
A kind of contact net protection against lightning strikes device as shown in Figure 1:, including high-voltage switch gear QF, transformer TK, rectifier diode D1, rectifier diode D2, current-limiting resistance R1, ac capacitor C1, super capacitor C, D.C. contactor KM1, programmable controller PLC, voltage transmitter XT, inverter M;The transformer TK primary side winding accesses contact net by high-voltage switch gear QF;Transformer One group of secondary side winding both ends tap meets rectifier diode D1, rectifier diode D2 respectively;Another group of winding access of transformer secondary Inverter M exchanges end;The negative terminal parallel connection of rectifier diode D1, rectifier diode D2 are followed by current-limiting resistance R1;D.C. contactor KM1 Contact is connected to the both ends current-limiting resistance R1;Another termination super capacitor C of current-limiting resistance R1;The negative terminal of super capacitor C connects transformation Device TK vice-side winding centre cap;Ac capacitor C1 is connected to the both ends of super capacitor C;Inverter M DC terminal is connected to super The both ends of capacitor C;Voltage transmitter XT primary side is connected to the both ends of super capacitor C, and secondary side signal accesses programmable controller PLC;PC application control line is separately connected D.C. contactor KM1, inverter M.
When device starts, first high-voltage switch gear QF is closed a floodgate, D.C. contactor KM1 disconnection, is super by current-limiting resistance R1 Capacitor C charges to system burning voltage;PC application reaches system by voltage transmitter XT monitoring voltage and stablizes D.C. contactor KM1 is closed a floodgate after voltage, the starting state of device completion at this time enters operating status and starts to carry out thunder to contact net Hit the various overvoltage protections such as overvoltage;Quickly overvoltage energy is inhaled when contact net has overvoltage that super capacitor C occurs It receives to eliminate overvoltage;PC application is by voltage transmitter XT monitoring voltage according to set value calculation inversion Feeding back to contact net for the energy of super capacitor C is realized in device M operation, makes super capacitor C have enough capacity to absorb next time excessively electric Pressure energy amount.

Claims (2)

1. contact net protection against lightning strikes device, including high-voltage switch gear QF, transformer TK, rectifier diode D1, rectifier diode D2, Current-limiting resistance R1, ac capacitor C1, super capacitor C, D.C. contactor KM1, PC application, voltage transmitter XT, Inverter M;Transformer TK primary side winding accesses contact net by high-voltage switch gear QF;One group of transformer TK pair side winding both ends tap Rectifier diode D1, rectifier diode D2 are met respectively;Another group of transformer TK pair side winding access inverter M exchanges end;Rectification The negative terminal parallel connection of diode D1, rectifier diode D2 are followed by current-limiting resistance R1;The contact D.C. contactor KM1 is connected to current-limiting resistance The both ends R1;Another termination super capacitor C of current-limiting resistance R1;The negative terminal of super capacitor C connects transformer TK vice-side winding center pumping Head;Ac capacitor C1 is connected to the both ends of super capacitor C;Inverter M DC terminal is connected to the both ends of super capacitor C;Voltage becomes The both ends for sending device XT primary side to be connected to super capacitor C, secondary side signal access PC application;Programmable controller PLC control line is separately connected D.C. contactor KM1, inverter M.
2. contact net protection against lightning strikes device according to claim 1, which is characterized in that control system uses programmable Controller PLC or industrial control computer COM control system.
CN201821359157.3U 2018-08-23 2018-08-23 Contact net protection against lightning strikes device Active CN209191727U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201821359157.3U CN209191727U (en) 2018-08-23 2018-08-23 Contact net protection against lightning strikes device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201821359157.3U CN209191727U (en) 2018-08-23 2018-08-23 Contact net protection against lightning strikes device

Publications (1)

Publication Number Publication Date
CN209191727U true CN209191727U (en) 2019-08-02

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
CN201821359157.3U Active CN209191727U (en) 2018-08-23 2018-08-23 Contact net protection against lightning strikes device

Country Status (1)

Country Link
CN (1) CN209191727U (en)

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