CN104868584B - A kind of seamless automatic switching control equipment of dc source - Google Patents

A kind of seamless automatic switching control equipment of dc source Download PDF

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Publication number
CN104868584B
CN104868584B CN201510223163.0A CN201510223163A CN104868584B CN 104868584 B CN104868584 B CN 104868584B CN 201510223163 A CN201510223163 A CN 201510223163A CN 104868584 B CN104868584 B CN 104868584B
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voltage
power supply
contactor
voltage output
normally
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CN104868584A (en
Inventor
温才权
全杰雄
王灿胜
韦鑫
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Wuzhou Bureau of Extra High Voltage Power Transimission Co
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Wuzhou Bureau of Extra High Voltage Power Transimission Co
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Abstract

A kind of seamless automatic switching control equipment of dc source of the present invention, control element is used as using simple and reliable voltage relay, it is set directly at the two ends of main power source input, if the voltage of main power source is less than the setting value of voltage relay, closure and the disconnection of the normally-closed contact and normally opened contact that are then arranged on by voltage relay control contactor on main power source and auxiliary power supply, so as to which the power supply for controlling this loop selects switching, it is arranged on the storage capacitor at voltage output end two ends, the stability of power supply switching can be improved, it is arranged on the diode between voltage output end and voltage relay, power supply switching time can be shortened.By the application of foregoing circuit and electronic component, the seamless automatic switchover of main power source and auxiliary power supply is realized, and ensure that load constantly electricity work.

Description

A kind of seamless automatic switching control equipment of dc source
Technical field
The present invention relates to field of power distribution, and in particular to a kind of seamless automatic switching control equipment of dc source.
Background technology
In distribution system in transformer station, visual plant is typically powered using dc source, reliable and stable in order to power, Need to be equipped with two power supply sources, in order to improve the power supply reliability of the distribution system, it is necessary in currently used power supply occur different Chang Shi, such as power loss or failure are powered, it is necessary to be switched to another road power supply.
Switching time requires there is diversity, such as, and general fire emergency requires that switching time is less than 5s, but high The fire emergency requirement that danger zone is used.Switching time is less than 0.25s, is that high-voltage gas discharging light does not put out when powering Brightness, then require switching time for several milliseconds of magnitudes, and when being that blower fan, pump class, rolling screen door, elevator even load are powered, according to application It is required that different, switching time also can be at several milliseconds etc..And the power supply switching such as ground protection device, automation equipment needs in transformer station Switching free of discontinuities.Existing power supply switching device typically has following several:
K:Switching time (≤5ms), supper-fast unperturbed automatically switches
It is empty:Switching time (≤15ms), quick unperturbed automatically switches
M:Switching time (≤150ms), common unperturbed automatically switches
In order to reach that supper-fast unperturbed automatically switches, typically switched using solid switch (IGCT), with same capacity Mechanical switch switch is compared, and the cost of solid-state switch (IGCT) switching is much higher, and on-state loss also can be relatively more, can Also reduced by property, and load terminal voltage is dropped to practically zero when switching.
The content of the invention
It is above-mentioned not enough there is provided a kind of seamless switching it is an object of the invention to overcome, simple, reliable dc source without Stitch automatic switching control equipment.
To reach the purpose of foregoing invention, the present invention is achieved through the following technical solutions:
A kind of seamless automatic switching control equipment of dc source of the present invention, including main power source first voltage input port, main electricity Source second voltage input port, auxiliary power supply first voltage input port, auxiliary power supply second voltage input port, voltage relay, Contactor, first voltage output end and second voltage output end, the main power source first voltage input port are sequentially connected voltage One end of relay coil, the 3rd of contactor the pair of normally-closed contact and first voltage output end, the main power source second voltage are defeated Inbound port is sequentially connected the other end of potential relay coil, the 4th pair of normally-closed contact of contactor and second voltage output end, The auxiliary power supply first voltage input port is sequentially connected one end of first pair of normally-closed contact of voltage relay, the of contactor A pair of normally opened contacts and first voltage output end, auxiliary power supply second voltage input port be sequentially connected contactor coil one end, The second pair of normally opened contact and second voltage output end of contactor, the other end connection voltage relay of the contactor coil The other end of first pair of normally-closed contact.Using the "on" position of voltage relay control contactor, and then by contactor to main electricity The break-make of source and auxiliary power supply is controlled, and voltage relay is as the control selections element in whole loop herein, and its definite value can root The demand for connecing load according to voltage output end is adjusted, using contactor, is conducive to bearing being passed through when frequently cut-offfing contact High current, while contactor has arc extinguishing ability, can be prevented effectively from because triggering equipment fault frequently the cut-offfing of contact point.
The resistance and electric capacity being in series are parallel between the first voltage output end and second voltage output end.It is electric herein Energy storage effect is held, the stability of voltage during improving power supply switching.Resistance plays partial pressure, to protect electric capacity in order to avoid mistake Stream.Through experimental test, when switching over operation between main power source and auxiliary power supply, in the case of the electric capacity, voltage output end Voltage drop to zero, when there is the electric capacity, the voltage of voltage output end is positively retained at more than 80% rated voltage.
It is in series with diode between the first voltage output end and the 3rd pair of normally-closed contact of contactor, and diode Negative pole, one end of resistance and capacitor seriesing circuit and the connection of first voltage output end three concurrent.Diode is to avoid herein Storage capacitor produces backward voltage to voltage relay and influences its work, and can accelerate the time of power supply switching.Through experiment Test, can make power supply switching time be reduced to 30ms by 2600ms, and handoff procedure load terminal voltage is remained above 80%.
Further, also it is in series with the two or two pole between the second voltage output end and the 4th pair of normally-closed contact of contactor Pipe, and the negative pole of the second diode, the other end of resistor-capacitor series circuit and the connection of first voltage output end three concurrent, should Second diode can further prevent the voltage reversal of electric capacity and influence contactor to work.
Further, one end of the coil of the contactor is also associated with the one of second pair of normally-closed contact of voltage relay End, second pair of normally-closed contact other end is connected with auxiliary power supply first voltage input port.Increased second pair of normally-closed contact be To prevent that first pair of normally closed contact from causing handoff functionality to fail extremely, so as to increase equipment dependability.
Further, exported after first voltage output end and second voltage output end the connection filtration module, filtration module To further regulated output voltage.The filtration module uses electromagnetic interface filter, and two voltage output ends of filtration module are new Voltage output end to connect load equipment.
Brief description of the drawings
Fig. 1 is the circuit diagram of the seamless automatic switching control equipment of dc source of the present invention.
Fig. 2 is the circuit diagram of the seamless automatic switching control equipment of dc source for being connected with filtration module of the present invention.
Fig. 3 is the seamless automatic switching control equipment of dc source of the present invention and the connection diagram of load.
Embodiment
The technical scheme in the embodiment of the present invention is clearly and completely described with reference to the accompanying drawings and examples, shown So, described embodiment is only a part of embodiment of the invention, rather than whole embodiments.
Embodiment
Referring to Fig. 1, the circuit diagram of the embodiment 1 for a kind of seamless automatic switching control equipment of dc source of the present invention, this The seamless automatic switching control equipment of dc source of embodiment, including main power source first voltage input port L1, main power source second voltage Input port N1, auxiliary power supply first voltage input port L2, auxiliary power supply second voltage input port N2, voltage relay JV, connect Tentaculum J1, first voltage output end O1 and second voltage output end O2.
Main power source and auxiliary power supply use 110V DC voltage, i.e. main power source first voltage input port L1 and main power source Second voltage input port N1 two terminates 110V DC voltages, auxiliary power supply first voltage input port L2 and auxiliary power supply second voltage Input port N2 indirect 110V DC voltages.
The main power source first voltage input port L1 is sequentially connected one end 18 of voltage relay JV coils, contactor J1 The 3rd couple of normally-closed contact 21-22 and first voltage output end O1, the main power source second voltage input port N2 is sequentially connected The other end 17 of voltage relay JV coils, the 4th of contactor J1 the couple of normally-closed contact 31-32 and second voltage output end O2, institute State auxiliary power supply first voltage input port L2 be sequentially connected voltage relay JV first couple of normally-closed contact 5-6 one end, contact Device J1 first couple of normally opened contact 1-2 and first voltage output end O1, auxiliary power supply second voltage input port N2, which is sequentially connected, to be connect One end A2 of tentaculum J1 coils, second couple of normally opened contact 3-4 of contactor and second voltage output end O2, the contactor J1 lines The other end A1 connection voltage relays JV of the circle first couple of normally-closed contact 5-6 other end.
Using voltage relay JV control contactors J1 "on" position, and then by contactor J1 to main power source and auxiliary power supply Break-make be controlled, herein voltage relay JV as whole loop control selections element, its definite value can according to first electricity The demand that pressure output end O1 and second voltage output end O2 connects load is adjusted, using contactor J1, is conducive to bearing frequency It is numerous to cut-off the high current passed through during contact, while contactor J1 has arc extinguishing ability, it can be prevented effectively from frequent because of contact point Cut-off and trigger equipment fault.
The seamless automatic switching control equipment of dc source also includes diode D, resistor R0 1 and electric capacity C01, the electricity After resistance device R01 connects with electric capacity C01, the two ends of its series circuit connect first voltage output end O1 and second voltage output respectively O2 is held, the diode is also in series between first voltage output end O1 and contactor J1 the 3rd couple of normally-closed contact 21-22 D, the diode D negative pole, one end of resistance R01 electric capacity C01 series circuits and the connection of first voltage output end O1 concurrents.
Further, as another embodiment, the 4th pair of the second voltage output end O2 and contactor J1 is normally closed tactile The second diode (not shown), and the second diode D2 negative pole, resistance R01 electric capacity C01 series connection are also in series between point 31-32 The other end and first voltage output end O1 three the concurrent connection of circuit.
Further, as another embodiment, one end A1 of the contactor J1 coils is also associated with voltage relay JV Second couple of normally-closed contact 13-14 one end, second pair of normally-closed contact 13-14 other end and auxiliary power supply first voltage input Mouth L2 connections.
Further, as another embodiment, referring to Fig. 2, seamless automatic to be connected with the dc source of filtration module The circuit diagram of switching device, the first voltage output end O1 and second voltage of the present embodiment dc source is seamless automatic switching control equipment Exported after output end O2 connection filtration modules, filtration module is used to further regulated output voltage.The filtration module uses EMI Wave filter, the voltage output end O12 and O22 of filtration module are the voltage output end of the new seamless automatic switching control equipment of dc source To connect load equipment, the load equipment is that one and the above can be attempted by the voltage output end of power transfer device simultaneously On.
It is easy to become apparent from the concrete structure for understanding the present embodiment and electrical principle, dc source is seamless automatic switching control equipment Operation principle is as follows:
When main power source is normally run, voltage relay JV coil two ends are powered, its first couple of normally-closed contact 5-6 and Two couples of normally-closed contact 13-14 are off, and voltage is not present as the coil ends A 1-A2 of control end in contactor J1, then Now contactor J1 first couple of normally opened contact 1-2 and second couple of normally opened contact 3-4 is off, therefore first voltage is defeated Going out to hold O1 and second voltage output end O2 to connect load is powered using main power source, and auxiliary power supply is completely isolated does not export.
When main power circuit voltage is less than voltage relay JV setting values, voltage relay JV dead electricity, its first couple is often Closed contact 5-6 and second pair of normally-closed contact 13-14 closure, then contactor J1 coil ends A 1-A2 is powered so that the 3rd pair often Closed contact 21-22 and the 4th couple of normally-closed contact 31-32 is disconnected, and first couple of normally opened contact 1-2 and second couple of normally opened contact 3-4 are closed Close, now first voltage output end O1 and second voltage output end O2, which connect load, is powered using auxiliary power supply, and main power source is complete Full isolation is not exported.
Diode D, electric capacity C01 and resistance R01 that the seamless automatic switching control equipment of dc source is used.Electric capacity herein C01 plays energy storage, the stability of voltage during improving power supply switching.Resistance R01 plays metering function, to protect electric capacity C01 is in order to avoid excessively stream.Through experimental test, when main power source and auxiliary power supply switch over operation, in the case of electric capacity C01, electricity The voltage of pressure output end drops to zero, when there is electric capacity C01, the voltage of voltage output end be positively retained at 80% rated voltage with On.Diode D influences its work to avoid storage capacitor from producing backward voltage to voltage relay herein, and can accelerate The time of power supply switching.Through experimental test, can make after power supply seamless switching, output voltage recover completely the normal time by 2600ms is reduced in 30ms, and handoff procedure, and load terminal voltage is remained above 80%.
By a kind of seamless automatic switching control equipment of dc source of the present invention, control is used as using simple and reliable voltage relay Element processed, improves the reliability in whole loop and the convenience of installation, using storage capacitor, can improve the stabilization of power supply switching Property, using diode, then shorten power supply switching time.By the application of foregoing circuit and electronic component, main power source is realized With the seamless automatic switchover of auxiliary power supply, and ensure that load constantly electricity work.
Above-described embodiment only not limits technical scheme described in the invention to illustrate the present invention;Therefore, although This specification is with reference to each above-mentioned embodiment to present invention has been detailed description, still, the ordinary skill of this area Personnel, which should be appreciated that, still the present invention can be modified or equivalent;And all do not depart from the present invention spirit and The technical scheme of scope and its improvement, it all should cover among scope of the presently claimed invention.

Claims (4)

1. a kind of seamless automatic switching control equipment of dc source, it is characterised in that:Including main power source first voltage input port (L1), Main power source second voltage input port (N1), auxiliary power supply first voltage input port (L2), auxiliary power supply second voltage input port (N2), voltage relay (JV), contactor (J1), first voltage output end (O1) and second voltage output end (O2), the master Power supply first voltage input port (L1) is sequentially connected one end (18) of voltage relay (JV) coil, the 3rd of contactor (J1) the To normally-closed contact (21-22) and first voltage output end (O1), the main power source second voltage input port (N2) is sequentially connected The other end (17) of voltage relay (JV) coil, the 4th pair of normally-closed contact (31-32) of contactor (J1) and second voltage are defeated Go out end (O2), the auxiliary power supply first voltage input port (L2) is sequentially connected first pair of normally-closed contact of voltage relay (JV) The one end of (5-6), first pair of normally opened contact (1-2) of contactor (J1) and first voltage output end (O1), the auxiliary electricity of power supply second Pressure input port (N2) be sequentially connected one end (A2) of contactor (J1) coil, second pair of normally opened contact (3-4) of contactor and Second voltage output end (O2), the first couple of the other end (A1) the connection voltage relay (JV) of contactor (J1) coil is often The other end of closed contact (5-6), is parallel between the first voltage output end (O1) and second voltage output end (O2) and mutually goes here and there The resistance (R01) and electric capacity (C01) of connection, the first voltage output end (O1) and the 3rd pair of normally-closed contact of contactor (J1) Diode (D), and negative pole, the resistance (R01) and the one of electric capacity (C01) series circuit of diode (D) are in series between (21-22) End and the connection of first voltage output end (O1) three concurrent.
2. the seamless automatic switching control equipment of dc source according to claim 1, it is characterised in that:The second voltage output The second diode, and the second diode are also in series between end (O2) and the 4th pair of normally-closed contact (31-32) of contactor (J1) Negative pole, the other end of resistance (R01) electric capacity (C01) series circuit and first voltage output end (O1) three concurrent connection.
3. the seamless automatic switching control equipment of dc source according to claim 1, it is characterised in that:Contactor (J1) line One end (A1) of circle is also associated with one end of second pair of normally-closed contact (13-14) of voltage relay (JV), and the second couple is normally closed Contact (13-14) other end is connected with auxiliary power supply first voltage input port (L2).
4. the seamless automatic switching control equipment of dc source according to claims 1 to 3 any one, it is characterised in that:It is described Exported after first voltage output end (O1) and second voltage output end (O2) connection filtration module, filtration module is to further steady Determine output voltage.
CN201510223163.0A 2015-05-05 2015-05-05 A kind of seamless automatic switching control equipment of dc source Active CN104868584B (en)

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CN108808841A (en) * 2018-06-29 2018-11-13 南方电网科学研究院有限责任公司 A kind of Power transfer system and intelligent electric energy meter

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CN101969225A (en) * 2010-11-01 2011-02-09 河南电力试验研究院 Dual-circuit automatic mutual-switching power system without break points
CN202585275U (en) * 2012-05-14 2012-12-05 江苏大全高压开关有限公司 Novel secondary control circuit of permanent magnet structure
CN204732957U (en) * 2015-05-05 2015-10-28 中国南方电网有限责任公司超高压输电公司梧州局 The seamless automatic switching control equipment of a kind of DC power supply
EP2579425B1 (en) * 2010-05-25 2018-04-11 Hytera Communications Corp., Ltd. Smooth switching device and method for double power supplies

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP3325299B2 (en) * 1992-09-10 2002-09-17 株式会社ソキア Power supply

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2579425B1 (en) * 2010-05-25 2018-04-11 Hytera Communications Corp., Ltd. Smooth switching device and method for double power supplies
CN101969225A (en) * 2010-11-01 2011-02-09 河南电力试验研究院 Dual-circuit automatic mutual-switching power system without break points
CN202585275U (en) * 2012-05-14 2012-12-05 江苏大全高压开关有限公司 Novel secondary control circuit of permanent magnet structure
CN204732957U (en) * 2015-05-05 2015-10-28 中国南方电网有限责任公司超高压输电公司梧州局 The seamless automatic switching control equipment of a kind of DC power supply

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