CN101651358A - Three-way power supply automatic switching line for improving service life of EPS system - Google Patents

Three-way power supply automatic switching line for improving service life of EPS system Download PDF

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Publication number
CN101651358A
CN101651358A CN200910144942A CN200910144942A CN101651358A CN 101651358 A CN101651358 A CN 101651358A CN 200910144942 A CN200910144942 A CN 200910144942A CN 200910144942 A CN200910144942 A CN 200910144942A CN 101651358 A CN101651358 A CN 101651358A
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China
Prior art keywords
eps
loop
contactor
power supply
automatic
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CN200910144942A
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CN101651358B (en
Inventor
陈国良
徐苏民
蔡芳
商长军
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Anhui Fangxing Science & Technology Co Ltd
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Anhui Fangxing Science & Technology Co Ltd
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Abstract

The invention belongs to the field of power supply of factories and relates to a three-way automatic switching line for prolonging the service life of an EPS system. The switching line comprises a control circuit, a common loop (1) switching control circuit, a standby loop (2) switching control circuit and an EPS switching control circuit, wherein the main loop of the control circuit comprises electrical elements, such as a three-connecting automatic breaker, a single-connecting automatic breaker, a middle relay, an AC contactor, a time relay, and the like. When any one or two ways of the commercial power of the common loop (1) and the standby loop (2) generate failure, the switching line can control the automatic switch between the two ways of the commercial power and an EPS according totime set by the preset time relay, prevents the frequent switch of the EPS and provides a reliable and stable uninterrupted power supply for the important electrical equipment of the factories. The invention has the advantages of high direct switching speed of a three-way power supply, simple operation, reliable performance and easy realization and generalization of technology and effectively prolongs the service life of the EPS.

Description

Improve the EPS system three-way power automatic switching line in useful life
Affiliated technical field
The invention belongs to the Factory Electricity Supply field, relate to a kind of EPS of the raising system three-way power automatic switching line in useful life.It can be applicable to the running environment of various complexity, satisfies importantly in the requirement of high power load electric equipment to uninterrupted power supply, reliable and stable uninterrupted power supply is provided can also for important computer, accurate control appliances such as PLC, DCS.
Background technology
In the Factory Electricity Supply field,, adopt the mode of power supply usually by complete independent civil power of two-way and EPS system interleaved power in order to guarantee the non-stop run of important electric equipment.Because the frequent unplanned power failure of civil power (or fault trip), make the EPS action not have rule and switching frequently, thereby the useful life of EPS and stable operating state have greatly been influenced, the activation meeting point that well-known EPS the best discharges and recharges be about three months once, keeping normal operating conditions can reach 12 to 15 years following useful life; For several times stop transmission process and can reach in one week of top in the reality, storage battery is among the frequent charging and discharging state, and like this, the trouble free service life-span of EPS system can only maintain about three to five years; Moreover, in the civil power outage in a flash, some control of conversion device of load end is in the state that frequency slowly descends, because EPS conversion comparatively slow (about 0.25 second), almost synchronous with the civil power contact of electric substation, very likely do not finish handoff procedure as yet at it, the civil power contact of electric substation is promptly closed a floodgate and (is annotated: after the civil power outage, the EPS action, electric substation's contact back civil power puts into operation, cut off EPS), thereby cause the continuous switching (even forming the switching conflict) of EPS and civil power contact, brought very big hidden danger for the normal operation of load, very easily cause frequency converter delay time electric after, the current peak that rises surpasses the protection upper limit (peak value be rated current the 200%) shutdown of reporting to the police suddenly; Simultaneously, also may cause the process data of computer to be lost, cause to produce to be subjected to very big influence, also can suffer greater loss economically simultaneously.
Summary of the invention
The present invention overcomes the shortcoming of prior art, and a kind of three-way power automatic switching line of safe and effective protection EPS power-supply system is provided.
Three-way power in the three-way power automatic switching line in raising of the present invention EPS system useful life be two-way fully independently voltage be that 380 volts three-phase alternating current is used loop 1# always, standing loop 2# and EPS power supply, automatic switch-over circuit is by the control circuit and the loop commonly used 1# control switching circuit of major loop, standing loop 2# control switching circuit and EPS control switching circuit are formed, the control circuit of major loop is by the first to the 33 automatic circuit breaker QL11, QL21, QL31, first to the 3rd A.C. contactor KM11, KM21, KM31 constitutes, loop wherein commonly used 1# control switching circuit is by being connected on first on the 1# three-phase of loop commonly used respectively, second, the 3rd simply connected automatic circuit breaker QL13, QL14, QL15, first, the second auxiliary relay KA11, the KA12 coil, first, the second auxiliary relay KA11, the KA12 normally opened contact, the first A.C. contactor KM11 coil, the second A.C. contactor KM21 normally-closed contact, loop 1# signal lamp LD11 commonly used forms; The switching controls loop of standing loop 2# is by being connected on 2# arbitrary the 4th simply connected automatic circuit breaker QL23 that goes up mutually in loop commonly used, the 3rd, the 4th auxiliary relay KA21, the KA22 coil, first, the second auxiliary relay KA11, KA12, the 4th auxiliary relay KA22 normally-closed contact, the 3rd, the 4th auxiliary relay KA21, the KA22 normally opened contact, the second A.C. contactor KM21 coil, switch pre-bell HA21, standing loop 2# indicator light HG21, the bell button SF21 that disappears forms, be characterized in that the EPS control switching circuit is by the 5th simply connected automatic circuit breaker QL32, the 3rd auxiliary relay KA21 and the second A.C. contactor KM21 normally-closed contact in parallel, the first A.C. contactor KM11 normally-closed contact, the 3rd A.C. contactor KM31 coil, time relay KT31, the KT13 of time relay related organization, EPS power supply indicator HG31 forms, the 5th simply connected automatic circuit breaker QL32 one terminates at that the EPS power supply is arbitrary to be gone up mutually, the other end connects the 3rd auxiliary relay KA21 and the second A.C. contactor KM21 normally-closed contact in parallel successively, the first A.C. contactor KM11 normally-closed contact, time relay KT31, the KT13 of time relay related organization meet the 3rd A.C. contactor KM31 coil and EPS power supply indicator HG31 in parallel.
The present invention meets a fictitious load M1 in EPS output place by the fictitious load combined floodgate circuit breaker Q L33 in parallel with the three or three automatic circuit breaker QL31.
The present invention adds direct sending switch-Di four, the five or three circuit breaker Q L12, the QL22 of two-way civil power in addition on the control circuit of major loop, in parallel with standing loop 2# work circuit breaker-first, second three auto-cutout QL11, QL21 with loop 1# commonly used respectively; In three tunnel output branch roads, be connected in series first-Di, three single-throw switch HK11, HK21, HK31 respectively; Three groups of zero lines are directly introduced from bus respectively, and three road control units are independent each other.
The present invention adopts the automatic switchover between the devices realization three-way powers such as circuit breaker, A.C. contactor, the time relay, can realize the following course of work by commutation circuit:
(1) under the conventional state, two-way civil power 1#, 2# freely change, and 1# is standing loop for loop commonly used, 2#.When the equal unexpected power down of two-way civil power, EPS puts into operation, under the prerequisite of EPS work, when the arbitrary road of two-way civil power restores electricity, the EPS automatic disconnection, civil power puts into operation, at three-way power all just often, two auxiliary relays on the 1# power supply get electronic work, cut off the normally-closed contact be connected in parallel on the auxiliary relay on the 2# power supply simultaneously and disconnect standing electric power loop, at this moment, again by the auxiliary relay on the electric power loop commonly used often open auxiliary magnet and contactor cuts off the EPS system, at this moment, be electric by the 1# power supply in the three-way power.
When 1# power supply dead electricity, by being connected in parallel on the normally-closed contact action auxiliary relay coil of the auxiliary relay on the standing loop, contactor coil is ON Action by the normally opened contact of auxiliary relay, simultaneously disconnecting the EPS control loop because of the normally-closed contact that is connected in parallel on the contactor on the EPS loop and the normally-closed contact action of auxiliary relay, is electric by the 2# power supply at this moment.
Under 1# power supply dead electricity, 2# power supply can not the situations of normal power supply, the EPS system is by contactor relay coil turn-on time, and delay time in real time, make the EPS system devote oneself to work, under the prerequisite of EPS work, when the arbitrary road of two-way civil power restores electricity, the EPS automatic disconnection, civil power puts into operation, and any one tunnel change-over time is all less than 0.1 second, to the almost not influence of major loop, control loop and running load.
(2) the present invention is in EPS output place in EPS output, meet a fictitious load M1 (daily disconnection) by the fictitious load combined floodgate circuit breaker Q L33 in parallel with the three or three automatic circuit breaker QL31, guarantee that three months EPS accumulator cell charging and dischargings once activate, and to keep its optimum state, delay useful life.
The invention has the beneficial effects as follows: 1. switch speed is fast between the three-way power, for important electric equipment provides reliable uninterrupted power supply.2. effectively protect the EPS system, prolonged EPS system useful life greatly, saved the funds of purchasing the EPS system in a large number for enterprise.3. avoid between EPS system and the civil power frequent switch cause in the EPS system frequency converter delay time electric after, the current peak that rises surpasses the protection upper limit and the shutdown of reporting to the police suddenly.4. the adverse effect of avoiding the switching of power supply that important electric equipment is caused makes to produce to avoid loss.5. adopt three-way power automatic switch-over circuit provided by the present invention, simple to operate, dependable performance, simultaneously, this technology is easy to realize, promote.
Description of drawings
Fig. 1 is the electrical schematic diagram of an embodiment of three-way power automatic switching line in raising provided by the present invention EPS system useful life.
Embodiment
Below in conjunction with accompanying drawing enforcement of the present invention is described.Fig. 1 is the electrical schematic diagram of an embodiment of three-way power automatic switching line in raising provided by the present invention EPS system useful life.
Specifically the three-way power automatic switchover course of work is described further below in conjunction with accompanying drawing, at three-way power all just often, two auxiliary relays on the 1# power supply get electronic work, cut off the normally-closed contact that is connected in parallel on the auxiliary relay on the 2# power supply simultaneously and disconnect standing electric power loop, at this moment, again by the auxiliary relay on the electric power loop commonly used often open auxiliary magnet and contactor cuts off the EPS system, at this moment, be electric by the 1# power supply in the three-way power.
When 1# power supply dead electricity, by being connected in parallel on the normally-closed contact action auxiliary relay coil of the auxiliary relay on the standing loop, contactor coil is ON Action by the normally opened contact of auxiliary relay, simultaneously disconnecting the EPS control loop because of the normally-closed contact that is connected in parallel on the contactor on the EPS loop and the normally-closed contact action of auxiliary relay, is electric by the 2# power supply at this moment.
Under 1# power supply dead electricity, 2# power supply can not the situations of normal power supply, the EPS system is by contactor relay coil turn-on time, and delay time in real time, make the EPS system devote oneself to work, under the prerequisite of EPS work, when the arbitrary road of two-way civil power restores electricity, the EPS automatic disconnection, civil power puts into operation, and any one tunnel change-over time is all less than 0.1 second, to the almost not influence of major loop, control loop and running load.
In EPS output place, it is in parallel with commutation circuit to connect one fictitious load-motor M 1 (daily disconnection) by fictitious load combined floodgate circuit breaker Q L33, guarantees that three months EPS accumulator cell charging and dischargings once activate, and to keep its optimum state, delay useful life.
The present invention adds the direct sending switch (respectively with loop 1# commonly used and standing loop 2# work circuit breaker-three auto-cutout QL11, QL21 direct sending circuit breaker-three auto-cutout QL12, QL22 in parallel) of two-way civil power in addition on the control circuit of major loop, to guarantee the work continuity of load in case of emergency; In three tunnel output branch roads, be connected in series single-throw switch HK11, HK21, HK31 respectively, be used for the isolated fault circuit, thereby be convenient to the maintenance and the element replacement of fault loop, the damage of arbitrary element or replacing do not influence the operate as normal in other loop in the circuit, three groups of zero lines are directly introduced from bus respectively, and three road control units are independent each other.
(1) the three-way power state all just often, first, second auxiliary relay coil KA11, KA12 on the 1# electric power loop simultaneously electronic work, first, second auxiliary relay KA11, the KA12 normally-closed contact that are connected in parallel on the 2# electric power loop by cut-out disconnect the 2# electric power loop; At this moment, 1# control power supply is connected the first contactor KM11 coil by the normally-closed contact that is connected on first, second auxiliary relay KA11, KA12 on the 1# electric power loop and often opens the auxiliary magnet and the second contactor KM21, cut off the EPS control loop because of the normally-closed contact action that is connected on the first contactor KM11 on the EPS loop simultaneously, this moment, the 1# power supply was an electric.
(2) 1# power supply dead electricity, move the 3rd auxiliary relay KA21 coil by the normally-closed contact that is connected in parallel on first, second auxiliary relay KA11 on the 2# loop or KA12, the second contactor KM21 coil is ON Action by the normally opened contact of the 3rd auxiliary relay KA21, simultaneously disconnecting the EPS control loop because of the normally-closed contact that is connected in parallel on the second contactor KM21 on the EPS loop and the normally-closed contact action of the 3rd auxiliary relay KA21, is electric by the 2# power supply at this moment.
(3) in 1# power supply dead electricity, and the 2# power supply can not the situation of operate as normal under, EPS control power supply is by the normally closed auxiliary contact relay K turn-on time T31 coil of the first contactor KM11 and the second contactor KM21, delay time after 0.1 second, the KT13 of time relay related organization action, thereby connect the 3rd contactor KM31 coil, at this moment, EPS is an electric.(to set 0.1 second and be in order to guarantee behind the 1# power cut-off, EPS be unlikely to try to be the first the 2# power supply and electronic work).
(4) the incoming call operate condition is opposite with the program of the operate condition that cuts off the power supply before this, and action order successively is always 1# power supply → 2# power supply → EPS.
(5) when normal and the 3rd air circuit QL15 of 1# power supply status disconnects, two control loops of 1# power supply and 2# power supply condition of all losing the job, this moment, load power source was directly provided by EPS.
(6) in the EPS control loop, the effect of the three auxiliary relay KA21 normally-closed contact in parallel with the second contactor KM21 normally closed auxiliary contact is, needs repairing when changing when the second contactor KM21 hinders for some reason, can guarantee that at least the EPS loop can operate as normal.
(7) under the normal condition, work circuit breaker-three automatic circuit breaker QL11, QL21, QL31, simply connected automatic circuit breaker QL13, QL14, QL15, QL23, QL32, single-throw switch HK11, HK21, HK31 all are in closing position; And direct sending circuit breaker-three auto-cutout QL12, QL22 and fictitious load combined floodgate circuit breaker Q L33 are in off-state.

Claims (3)

1, a kind of EPS system three-way power automatic switching line in useful life that improves, this three-way power be two-way fully independently voltage be 380 volts three-phase alternating current loop (1#) commonly used, standing loop (2#) and EPS power supply, automatic switching line is by the control circuit and loop (1#) the commonly used control switching circuit of major loop, standing loop (2#) control switching circuit and EPS control switching circuit are formed, the control circuit of major loop is by the first to the 33 automatic circuit breaker (QL11, QL21, QL31), first to the 3rd A.C. contactor (KM11, KM21, KM31) constitute, loop (1#) wherein commonly used control switching circuit is by being connected on first on the three-phase of loop commonly used (1#) respectively, second, the 3rd simply connected automatic circuit breaker (QL13, QL14, QL15), first, second auxiliary relay (the KA11, KA12) coil, first, second auxiliary relay (the KA11, KA12) normally opened contact, first A.C. contactor (KM11) coil, second A.C. contactor (KM21) normally-closed contact, loop (1#) signal lamp (LD11) commonly used is formed; The switching controls loop in standing loop (2#) is by being connected on arbitrary the 4th simply connected automatic circuit breaker of going up mutually (QL23) in loop commonly used (2#), the 3rd, the 4th auxiliary relay (KA21, KA22) coil, first, second auxiliary relay (the KA11, KA12), the 4th auxiliary relay (KA22) normally-closed contact, the 3rd, the 4th auxiliary relay (KA21, KA22) normally opened contact, second A.C. contactor (KM21) coil, switch pre-bell (HA21), standing loop (2#) indicator light (HG21), the bell button (SF21) that disappears is formed, it is characterized in that: the EPS control switching circuit is by the 5th simply connected automatic circuit breaker (QL32), the 3rd auxiliary relay (KA21) in parallel and second A.C. contactor (KM21) normally-closed contact, first A.C. contactor (KM11) normally-closed contact, the 3rd A.C. contactor (KM31) coil, the time relay (KT31), time relay related organization (KT13), EPS power supply indicator (HG31) is formed, described the 5th simply connected automatic circuit breaker (QL32) terminates at that the EPS power supply is arbitrary to be gone up mutually, the other end connects the 3rd auxiliary relay (KA21) in parallel and second A.C. contactor (KM21) normally-closed contact successively, first A.C. contactor (KM11) normally-closed contact, the time relay (KT31), time relay related organization (KT13) connects the 3rd A.C. contactor (KM31) coil and EPS power supply indicator (HG31) in parallel.
2, the EPS system three-way power automatic switching line in useful life that improves according to claim 1 is characterized in that: connect a fictitious load (M1) in EPS output place by the fictitious load combined floodgate circuit breaker (QL33) in parallel with the three or three automatic circuit breaker (QL31).
3, the EPS system three-way power automatic switching line in useful life that improves according to claim 1 and 2, it is characterized in that: add direct sending switch-Di four, the five or three automatic circuit breaker (QL12, QL22) of two-way civil power on the control circuit of major loop in addition, (QL11, QL21) is in parallel with standing loop (2#) work circuit breaker-first, second three auto-cutout with loop commonly used (1#) respectively; In three tunnel output branch roads, be connected in series the first-the three single-throw switch (HK11, HK21, HK31) respectively; Three groups of zero lines are directly introduced from bus respectively, and three road control units are independent each other.
CN2009101449426A 2009-09-10 2009-09-10 Three-way power supply automatic switching line for improving service life of EPS system Expired - Fee Related CN101651358B (en)

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CN103326457A (en) * 2013-06-02 2013-09-25 深圳市广前电力有限公司 Control method and control device based on gas-steam integral unit security segment interlock automatic switch
CN104201763A (en) * 2014-09-19 2014-12-10 国家电网公司 Alternating-current distribution panel emergency power device
CN106487091A (en) * 2016-08-26 2017-03-08 国家电网公司客户服务中心南方分中心 A kind of double loop power supply device of WMG
CN107302218A (en) * 2017-08-08 2017-10-27 内蒙古鄂尔多斯联合化工有限公司 It is a kind of to control switchgear house with PLC
CN108832622A (en) * 2018-06-21 2018-11-16 衢州杭氧气体有限公司 A kind of three power transfer device of industrial light

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CN1365173A (en) * 2001-12-07 2002-08-21 汕头经济特区自动化电器设备总厂有限公司 Three phase emergency power source
JP2004104851A (en) * 2002-09-05 2004-04-02 Meidensha Corp Linkage system provided with generator-linkage function
CN201528221U (en) * 2009-09-10 2010-07-14 安徽方兴科技股份有限公司 Three-path power automatic-switching circuit for improving service life of EPS system

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103326457A (en) * 2013-06-02 2013-09-25 深圳市广前电力有限公司 Control method and control device based on gas-steam integral unit security segment interlock automatic switch
CN104201763A (en) * 2014-09-19 2014-12-10 国家电网公司 Alternating-current distribution panel emergency power device
CN104201763B (en) * 2014-09-19 2016-02-10 国家电网公司 AC distribution panel emergency power supply unit
CN106487091A (en) * 2016-08-26 2017-03-08 国家电网公司客户服务中心南方分中心 A kind of double loop power supply device of WMG
CN107302218A (en) * 2017-08-08 2017-10-27 内蒙古鄂尔多斯联合化工有限公司 It is a kind of to control switchgear house with PLC
CN108832622A (en) * 2018-06-21 2018-11-16 衢州杭氧气体有限公司 A kind of three power transfer device of industrial light

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