CN103094983A - Power supply system and control method with automatic power source switch function - Google Patents
Power supply system and control method with automatic power source switch function Download PDFInfo
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- CN103094983A CN103094983A CN2011103394020A CN201110339402A CN103094983A CN 103094983 A CN103094983 A CN 103094983A CN 2011103394020 A CN2011103394020 A CN 2011103394020A CN 201110339402 A CN201110339402 A CN 201110339402A CN 103094983 A CN103094983 A CN 103094983A
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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
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B70/00—Technologies for an efficient end-user side electric power management and consumption
- Y02B70/30—Systems integrating technologies related to power network operation and communication or information technologies for improving the carbon footprint of the management of residential or tertiary loads, i.e. smart grids as climate change mitigation technology in the buildings sector, including also the last stages of power distribution and the control, monitoring or operating management systems at local level
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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
- Y04—INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
- Y04S—SYSTEMS INTEGRATING TECHNOLOGIES RELATED TO POWER NETWORK OPERATION, COMMUNICATION OR INFORMATION TECHNOLOGIES FOR IMPROVING THE ELECTRICAL POWER GENERATION, TRANSMISSION, DISTRIBUTION, MANAGEMENT OR USAGE, i.e. SMART GRIDS
- Y04S20/00—Management or operation of end-user stationary applications or the last stages of power distribution; Controlling, monitoring or operating thereof
- Y04S20/20—End-user application control systems
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Abstract
A power supply system with an automatic power source switch function comprises a main power source circuit device, a standby power source circuit device and a control unit. The main power source circuit device comprises a first main relay switch and a first silicon control rectifier switch. The standby power source circuit device comprises a second main relay switch and a second silicon control rectifier switch. When a main power source can work normally, the control unit enables the first main relay switch and the first silicon control rectifier switch to be connected, so that the main power source supplies electric power to load through the main power source circuit device. When the main power source can not work normally, the control unit enables the second main relay switch and the second silicon control rectifier switch to be connected, so that a standby power source supplies the electric power to the load through the standby power source circuit device.
Description
Technical field
The present invention relates to a kind of electric power system and control method thereof, espespecially a kind of electric power system and control method thereof with power supply automatic switching function.
Background technology
Automatic power switch (Automatic Transfer Switch) referred to as ATS, is a kind of electric power loop automatic transfer switch, is used for providing the switching of main power source and stand-by power supply, and making provides single power supply output.When main power source power supply power shortage or when interrupting, automatic power switch can be automatically with electrical source exchange to stand-by power supply, the electric power that continues to provide stable makes equipment end obtain most complete electric power protection with protection equipment.
See also Fig. 1, have the circuit diagram of the electric power system of power supply automatic switching function for prior art.As shown in the figure, this electric power system has the double-power supply loop structure, and, carry out the switching of double-power supply loop by an automatic transfer switch equipment 100, to provide normal power supply to a load 74.That is this electric power system comprises a main power source V1, a stand-by power supply V2, this automatic transfer switch equipment 100, a main power circuit 71, a stand-by power supply loop 72 and a load circuit 73.
This automatic transfer switch equipment 100 comprises one first switch 81, a second switch 82, one the 3rd switch 91 and one the 4th switch 92.This first switch 81 is electrically connected these main power circuits 71, and this second switch 82 is electrically connected this stand-by power supply loop 72.The 3rd switch 91 comprises one first contact 91a, one second contact 91b and a common contact 91c, and the 4th switch 92 comprises one first contact 92a, one second contact 92b and a common contact 92c.
When this main power source V1 can normal power supply, this first switch 81 of this automatic transfer switch equipment 100 is conducting (turned-on) state, and, this common joint 91c of the 3rd switch 91 and this first contact 91a connect, this common joint 92c of the 4th switch 92 and this first contact 92a connect, make this main power source V1 by this main power circuit 71 and this load circuit 73, to these load 74 power supplies.Otherwise when this main power source V1 can't normal power supply, this first switch 81 of this automatic transfer switch equipment 100 was cut-off (turned-off) state, and this second switch 82 that automaticallyes switch is conducting (turned-on) state.Moreover, this common joint 91c of the 3rd switch 91 switches and this second contact 91b connects, this common joint 92c of the 4th switch 92 switches and this second contact 92b connects, and makes this stand-by power supply V2 by this stand-by power supply loop 72 and this load circuit 73, to these load 74 power supplies.By this, when this main power source V1 power supply power shortage or when interrupting, automatic power switch can be automatically with electrical source exchange to this stand-by power supply V2, the electric power that continues to provide stable makes equipment end obtain most complete electric power protection with protection equipment.
In the power transmission and distribution operation of electric power system, the common electric arc that produces under non-control (electric arc) causes damage to electrical power trans mission/distribution system and back end electronics to meeting.For example, in power distribution circuit, the electric arc that occurs between switch contact can melt switch contact, causes switch failure, auxiliary device fault, even because of loop switch failure between main power source and stand-by power supply, and institute causes fire alarm and the thing generation that causes casualties.
Therefore, how to design a kind of electric power system and control method thereof with automatic power switch, utilize thyristor (SCR) to have the characteristic that to bear larger immediate current ability, replace the restriction that relay (relay) has mechanical endurance, reliability and the harmony switched to improve this stand-by power supply of main power source are a large problem that overcomes and solve for institute of the present invention wish row.
Summary of the invention
A purpose of the present invention is to provide a kind of electric power system with power supply automatic switching function, to overcome the problem of known techniques.
Therefore the power supply with power supply automatic switching function of the present invention is united, a load is provided the power supply of not cutting off the power supply.This power supply turnkey with power supply automatic switching function contains a main power circuit device, a stand-by power supply loop apparatus and a control unit.
This main power circuit device and a main power source are electrically connected.This main power circuit device comprises one first main relay switch and one first thyristor switch.This first thyristor switch electrically is connected in series this first main relay switch and this load.
This stand-by power supply loop apparatus and a stand-by power supply are electrically connected, and electrically are connected in parallel with this main power circuit device.This stand-by power supply loop apparatus comprises one second main relay switch and one second thyristor switch.This second thyristor switch electrically is connected in series this second main relay switch and this load.
This control unit produces a plurality of driving signals, to control conducting or the cut-off of this first main relay switch, this first thyristor switch, this second main relay switch and this second thyristor switch.
Another object of the present invention is to provide a kind of control method with electric power system of power supply automatic switching function, to overcome the problem of known techniques.
Therefore the control method with electric power system of power supply automatic switching function of the present invention comprises the following step: (a) provide a main power circuit device, the one first thyristor switch that has one first main relay switch and electrically be connected in series with this first main relay switch; This main power circuit device is electrically connected by a main power source current supply circuit and a main power source, and is electrically connected by a load circuit and a load; (b) provide a stand-by power supply loop apparatus that electrically is connected in parallel with this main power circuit device, the one second thyristor switch that has one second main relay switch and electrically be connected in series with this second main relay switch; This stand-by power supply loop apparatus saturating one this stand-by power supply current supply circuit and a stand-by power supply are electrically connected, and are electrically connected by this load circuit and this load; (c) provide a control unit, produce a plurality of driving signals, to control conducting or the cut-off of this first main relay switch, this first thyristor switch, this second main relay switch and this second thyristor switch; (d) when this main power source can normal power supply, this first main relay switch of this control unit conducting and this first thyristor switch, make this main power source by this main power circuit device to this load supplying; (e) when this main power source can't normal power supply, this second main relay switch of this control unit conducting and this second thyristor switch, make this stand-by power supply by this stand-by power supply loop apparatus to this load supplying.
Reach in order further to understand the present invention technology, means and the effect that predetermined purpose is taked, see also following about detailed description of the present invention and accompanying drawing, believe purpose of the present invention, feature and characteristics, when getting thus one deeply and concrete understanding, yet appended graphic only provide with reference to and explanation use, be not to the present invention's limitr in addition.
Description of drawings
Fig. 1 is the circuit diagram that prior art has the electric power system of power supply automatic switching function;
Fig. 2 is the circuit diagram that the present invention has electric power system first embodiment of power supply automatic switching function;
Fig. 3 is the circuit diagram that the present invention has electric power system second embodiment of power supply automatic switching function;
Fig. 4 is the control sequential chart of electric power system when voltage low (brown-out) operates that the present invention has the power supply automatic switching function;
Fig. 5 is the control sequential chart of electric power system when voltage lost efficacy (drop-out) operation that the present invention has the power supply automatic switching function; And
Fig. 6 is the flow chart that the present invention has the control of power supply system method of power supply automatic switching function.
Wherein, description of reference numerals is as follows:
The V1 main power source
The V2 stand-by power supply
100 automatic transfer switch equipment
71 main power circuits
72 stand-by power supply loops
73 load circuits
74 loads
81 first switches
82 second switches
91 the 3rd switches
91a the first contact
91b the second contact
The 91c common joint
92 the 4th switches
92a the first contact
92b the second contact
The 92c common joint
(the present invention)
10 main power circuit devices
102 first main relay switches
104 first thyristor switches
20 stand-by power supply loop apparatus
202 second main relay switches
204 second thyristor switches
30 control units
The V1 main power source
The V2 stand-by power supply
14 main power source current supply circuits
24 stand-by power supply current supply circuits
34 load circuits
40 loads
Srs1 the first main relay switching drive signal
Sss1 the first thyristor switching drive signal
Srp1 the first auxiliary relay switching drive signal
Srs2 the second main relay switching drive signal
Sss2 the second thyristor switching drive signal
Srp2 the second auxiliary relay switching drive signal
The t1 very first time
The second time of t2
The 3rd time of t3
The 4th time of t4
The 5th time of t5
The 6th time of t6
S100～S500 step
Embodiment
Relevant the technical content and a detailed description coordinate graphic being described as follows:
See also Fig. 2, have the circuit diagram of electric power system first embodiment of power supply automatic switching function for the present invention.As shown in Figure 2, the electric power system that this has the power supply automatic switching function provides a main power source current supply circuit 14, a stand-by power supply current supply circuit 24 and a load circuit 34, is electrically connected respectively a main power source V1, a stand-by power supply V2 and a load 40.This electric power system with power supply automatic switching function comprises a main power circuit device 10, a stand-by power supply loop apparatus 20 and a control unit 30.Wherein, this main power source is an electric main (AC utility) or a rotor machine (generator); This stand-by power supply is a UPS power supply (UPS).
This main power circuit device 10 is electrically connected with this main power source V1 by this main power source current supply circuit 14.This main power circuit device 10 comprises one first main relay switch 102 and one first thyristor switch 104.This first main relay switch 102 electrically is connected in series this main power source current supply circuit 14.This first thyristor switch 104 electrically is connected in series this first main relay switch 102 and this load circuit 34.This stand-by power supply loop apparatus 20 is electrically connected with this stand-by power supply V2 by this stand-by power supply current supply circuit 24, and electrically is connected in parallel with this main power circuit device 10.This stand-by power supply loop apparatus 20 comprises one second main relay switch 202 and one second thyristor switch 204.This second main relay switch 202 electrically is connected in series this stand-by power supply current supply circuit 24.This second thyristor switch 204 electrically is connected in series this second main relay switch 202 and this load circuit 34.This control unit 30 is electrically connected this main power circuit device 10 and this stand-by power supply loop apparatus 20, and produce a plurality of driving signal Srs1, Sss1, Srs2, Sss2 (later more detailed description will be arranged) is to control respectively conducting or the cut-off of this first main relay switch 102, this first thyristor switch 104, this second main relay switch 202 and this second thyristor switch 204.
Wherein, when this main power source V1 can normal power supply, these control unit 30 conductings this first main relay switch 102 and this first thyristor switch 104 made this main power source V1 by 10 pairs of these loads of this main power circuit device, 40 power supplies; When this main power source V1 can't normal power supply, these control unit 30 conductings this second main relay switch 202 and this second thyristor switch 204 made this stand-by power supply V2 by 20 pairs of these loads of this stand-by power supply loop apparatus, 40 power supplies.
Be worth mentioning, compared to known techniques, in the first embodiment, replace relay switch with this first thyristor switch 104 with this second thyristor switch 204.(SCR) has the ability that can bear larger immediate current due to thyristor, and, if also relay (relay) does not have the restriction of mechanical endurance, therefore, can avoid relay switch when switching, if the instantaneous large-current relay switch of flowing through is arranged, the electric arc that produces under non-control (electric arc), the damage of relay switch contact will be caused, after also making repeatedly switching use, to cause relay switch to open and close the anxiety of inefficacy, and cause the thing of this main power source V1 and this stand-by power supply V2 handoff failure or misoperation to occur.
Moreover in the electric power system operation with power supply automatic switching function, the harmony (coordination) of this main power source V1 and this stand-by power supply V2 handoff procedure is especially with important.In other words, when this main power source V1 can't normal power supply, and need to switch to this stand-by power supply V2 and carry out powered operation the time, this the second main relay switch 202 need first be completed the action of closed conducting, that is, after making this stand-by power supply V2 determine incision, then this first main relay switch 102 is cut off.In addition, after this stand-by power supply V2 determines that incision and this first main relay switch 102 cut off, this the second thyristor switch 204 is gone closed conducting again, completing the switching controls of break-before-make (break before make), and realizes uninterruptedly switching between different input powers.Otherwise, when this stand-by power supply V2 powers, when this main power source V1 can recover normal power supply, that is, during changeable time this main power source V1 power supply, this first main relay switch 102 need first be completed the action of closed conducting, that is, after making this main power source V1 determine to drop into, then this second main relay switch 202 is cut off.In addition, after this main power source V1 determines that incision and this second main relay switch 202 cut off, this the first thyristor switch 104 is gone closed conducting again, completing the switching mode of break-before-make (break before make), and realizes uninterruptedly switching between different input powers.Above description will be illustrated according to the sequencing control mode later.Therefore, in the present invention, the ability that can bear larger immediate current except this first thyristor switch 104 and this second thyristor switch 204, avoid because electric arc causes outside the thing generation of this main power source V1 and this stand-by power supply V2 handoff failure or misoperation, this first main relay switch 102 more plays the part of with this second main relay switch 202 key player who keeps this main power source V1 and this stand-by power supply V2 handoff procedure harmony.
See also Fig. 3, have the circuit diagram of electric power system second embodiment of power supply automatic switching function for the present invention.The difference of this second embodiment and above-mentioned the first embodiment maximum is that this main power circuit device 10 more comprises one first auxiliary relay switch 106, and this first thyristor switch 104 electrically is connected in parallel; This stand-by power supply loop apparatus 20 more comprises one second auxiliary relay switch 206, and this second thyristor switch 204 electrically is connected in parallel.In other words, the electric power system that this has the power supply automatic switching function provides this main power source current supply circuit 14, this stand-by power supply current supply circuit 24 and this load circuit 34, is electrically connected respectively this main power source V1, this stand-by power supply V2 and this load 40.This electric power system with power supply automatic switching function comprises this main power circuit device 10, this stand-by power supply loop apparatus 20 and this control unit 30.
This main power circuit device 10 is electrically connected with this main power source V1 by this main power source current supply circuit 14.This main power circuit device 10 comprises this first main relay switch 102, this first thyristor switch 104 and this first auxiliary relay switch 106.This first main relay switch 102 electrically is connected in series this main power source current supply circuit 14.This first thyristor switch 104 electrically is connected in series this first main relay switch 102 and this load circuit 34.This stand-by power supply loop apparatus 20 is electrically connected with this stand-by power supply V2 by this stand-by power supply current supply circuit 24, and electrically is connected in parallel with this main power circuit device 10.This stand-by power supply loop apparatus 20 comprises this second main relay switch 202, this second thyristor switch 204 and this second auxiliary relay switch 206.This second main relay switch 202 electrically is connected in series this stand-by power supply current supply circuit 24.This second thyristor switch 204 electrically is connected in series this second main relay switch 202 and this load circuit 34.This control unit 30 is electrically connected this main power circuit device 10 and this stand-by power supply loop apparatus 20, and produce a plurality of driving signal Srs1, Sss1, Srp1, Srs2, Sss2, Srp2 (later more detailed description will be arranged) is to control respectively conducting or the cut-off of this first main relay switch 102, this first thyristor switch 104, this first auxiliary relay switch 106, this second main relay switch 202, this second thyristor switch 204 and this second auxiliary relay switch 206.
Wherein, when this main power source V1 can normal power supply, these control unit 30 conductings this first main relay switch 102 and this first thyristor switch 104 made this main power source V1 by 10 pairs of these loads of this main power circuit device, 40 power supplies; When this main power source V1 can't normal power supply, these control unit 30 conductings this second main relay switch 202 and this second thyristor switch 204 made this stand-by power supply V2 by 20 pairs of these loads of this stand-by power supply loop apparatus, 40 power supplies.
Be worth mentioning, in the electric power system operation with power supply automatic switching function, can reduce this first thyristor switch 104 and lose (conduction losses) with the conducting of this second thyristor switch 204, the efficient that automaticallyes switch to improve power supply is also another important problem.Therefore, when this main power source V1 normal power supply, after cutting with definite this main power source V1 by this first main relay switch 102 of closed conducting, again with these the first thyristor switch 104 conductings, this the first auxiliary relay switch 106 of conducting more afterwards, make this first auxiliary relay switch 106 can this first thyristor switch 104 of bypass (bypass), make this main power source V1 by the guiding path of this first main relay switch 102 and this first thyristor switch 104, power supply is powered by 34 pairs of these loads of this load circuit 40 again.Therefore, can utilize this first auxiliary relay switch 106 these the first thyristor switches 104 that are electrically connected in parallel, so that bypass (bypass) path to be provided, make the conducting loss that reduces widely this first thyristor switch 104.similarly, when switching to this stand-by power supply V2 power supply, after cutting with definite this stand-by power supply V2 by this second main relay switch 202 of closed conducting, again with these the second thyristor switch 204 conductings, this the second auxiliary relay switch 206 of conducting more afterwards, make this second auxiliary relay switch 206 can this second thyristor switch 204 of bypass (bypass), make this stand-by power supply V2 by the guiding path of this second main relay switch 202 and this second thyristor switch 204, power supply is powered by 34 pairs of these loads of this load circuit 40 again.Therefore, can utilize this second auxiliary relay switch 206 these the second thyristor switches 204 that are electrically connected in parallel, so that bypass (bypass) path to be provided, make the conducting loss that reduces widely this second thyristor switch 204.
Below, will be example by two kinds of abnormal powered operation, illustrate that the present invention has the sequencing control mode of the electric power system of power supply automatic switching function.See also Fig. 4, have the control sequential chart of electric power system when voltage low (brown-out) operates of power supply automatic switching function for the present invention.As shown in Figure 4, operating process is divided into three parts, ((t5～t6) for this electric power system is the normal power supply operation, (t3～t4) be that this voltage low (brown-out) operates to the second power supply process to the first power supply process for t1～t2), the 3rd process.
at the first power supply process (in t1～t2), this main power source V1 can provide normal power supply, and, this control unit 30 (coordinating referring to Fig. 3), sequentially produce the first main relay switching drive signal Srs1 of a high levle, the first auxiliary relay switching drive signal Srp1 of the first thyristor switching drive signal Sss1 of one high levle and a high levle, therefore, this the first main relay switch 102 of sequentially closed conducting, this the first thyristor switch 104 and this first auxiliary relay switch 106, make this main power source V1 by 10 pairs of these loads of this main power circuit device, 40 power supplies, to complete the normal power supply program of this main power source V1.Moreover, when this main power source V1 completed normal power supply, at this moment, this control unit 30 produced the second main relay switching drive signal Srs2 of a high levle again, this the second main relay switch 202 of first closed conducting makes this stand-by power supply of importing V2 be the power supply state of awaiting orders.
at the second power supply process (in t3～t4), this main power source V1 is due to voltage low (brown-out) situation occuring, therefore, normal power supply can't be provided, therefore, this control unit 30 sequentially produces the first auxiliary relay switching drive signal Srp1 of a low level, the first main relay switching drive signal Srs1 of the first thyristor switching drive signal Sss1 of one low level and a low level, therefore, sequentially disconnect this first auxiliary relay switch 106 of cut-off, this the first thyristor switch 104 and this first main relay switch 102, make this main power source V1 stop this load 40 power supplies, on the other hand, after this first main relay switch 102 is completed the disconnection cut-off, this control unit 30 sequentially produces this second thyristor switching drive signal Sss2 of a high levle and this second auxiliary relay switching drive signal Srp2 of a high levle, therefore, sequentially closed conducting this second thyristor switch 204 and this second auxiliary relay switch 206.So, this stand-by power supply V2 is by 20 pairs of these loads of this stand-by power supply loop apparatus, 40 power supplies, to complete the power supply program of switching this stand-by power supply V2.
At the 3rd power supply process (in t5～t6), when this main power source V1 can recover normal power supply, this control unit 30 first produces the first main relay switching drive signal Srs1 of a high levle, with this first main relay switch 102 of closed conducting, make this main power source of importing V1 be the power supply state of awaiting orders.Then, this control unit 30 sequentially produces the second auxiliary relay switching drive signal Srp2 of a low level, the second thyristor switching drive signal Sss2 of a low level and the second main relay switching drive signal Srs2 of a low level again, therefore, sequentially disconnect cut-off this second auxiliary relay switch 206, this second thyristor switch 204 and this second main relay switch 202, make this stand-by power supply V2 stop this load 40 power supplies; On the other hand, after this second main relay switch 202 is completed the disconnection cut-off, this control unit 30 sequentially produces this first thyristor switching drive signal Sss1 of a high levle and this first auxiliary relay switching drive signal Srp1 of a high levle, therefore, this first thyristor switch 104 and this first auxiliary relay switch 106 of sequentially closed conducting.So, this main power source V1 is by 10 pairs of these loads of this main power circuit device, 40 power supplies, to complete the power supply program of switching this main power source V1.
Be worth mentioning, in this main power source V1 and this stand-by power supply V2 switching power supply process, provide those to drive the sequencing control of signal by this control unit 30, reaching the switching controls of break-before-make (break before make), and realize the uninterrupted harmony of switching between different input powers.Moreover, by conducting or the cut-off order to this first thyristor switch 104 and this first auxiliary relay switch 106 (or this second thyristor switch 204 and this second auxiliary relay switch 206), make this first auxiliary relay switch 106 (or second auxiliary relay switch 206) that bypass (bypass) path is provided, to reduce widely the conducting loss of this first thyristor switch 104 (or this second thyristor switch 204).
See also Fig. 5, have the control sequential chart of electric power system when voltage lost efficacy (drop-out) operation of power supply automatic switching function for the present invention.As shown in Figure 5, operating process is divided into three parts, the first power supply process (t1～t2), the 3rd process (t5～t6) for this electric power system is the normal power supply operation, the second power supply process (t3～t4) for this voltage lost efficacy (drop-out) operate.
at the first power supply process (in t1～t2), this main power source V1 can provide normal power supply, and, this control unit 30 (coordinating referring to Fig. 3), sequentially produce the first main relay switching drive signal Srs1 of a high levle, the first auxiliary relay switching drive signal Srp1 of the first thyristor switching drive signal Sss1 of one high levle and a high levle, therefore, this the first main relay switch 102 of sequentially closed conducting, this the first thyristor switch 104 and this first auxiliary relay switch 106, make this main power source V1 by 10 pairs of these loads of this main power circuit device, 40 power supplies, to complete the normal power supply program of this main power source V1.Moreover, when this main power source V1 completed normal power supply, at this moment, this control unit 30 produced the second main relay switching drive signal Srs2 of a high levle again, this the second main relay switch 202 of first closed conducting makes this stand-by power supply of importing V2 be the power supply state of awaiting orders.
at the second power supply process (in t3～t4), this main power source V1 is due to voltage inefficacy (drop-out) situation occuring, therefore, normal power supply can't be provided, therefore, this control unit 30 produces the first auxiliary relay switching drive signal Srp1 of a low level simultaneously, the first main relay switching drive signal Srs1 of the first thyristor switching drive signal Sss1 of one low level and a low level, therefore, disconnect simultaneously this first auxiliary relay switch 106 of cut-off, this the first thyristor switch 104 and this first main relay switch 102, make this main power source V1 stop this load 40 power supplies, on the other hand, after this first main relay switch 102 is completed the disconnection cut-off, this control unit 30 sequentially produces this second thyristor switching drive signal Sss2 of a high levle and this second auxiliary relay switching drive signal Srp2 of a high levle, therefore, sequentially closed conducting this second thyristor switch 204 and this second auxiliary relay switch 206.So, this stand-by power supply V2 is by 20 pairs of these loads of this stand-by power supply loop apparatus, 40 power supplies, to complete the power supply program of switching this stand-by power supply V2.
At the 3rd power supply process (in t5～t6), when this main power source V1 can recover normal power supply, this control unit 30 first produces the first main relay switching drive signal Srs1 of a high levle, with this first main relay switch 102 of closed conducting, make this main power source of importing V1 be the power supply state of awaiting orders.Then, this control unit 30 sequentially produces the second auxiliary relay switching drive signal Srp2 of a low level, the second thyristor switching drive signal Sss2 of a low level and the second main relay switching drive signal Srs2 of a low level again, therefore, sequentially disconnect cut-off this second auxiliary relay switch 206, this second thyristor switch 204 and this second main relay switch 202, make this stand-by power supply V2 stop this load 40 power supplies; On the other hand, after this second main relay switch 202 is completed the disconnection cut-off, this control unit 30 sequentially produces this first thyristor switching drive signal Sss1 of a high levle and this first auxiliary relay switching drive signal Srp1 of a high levle, therefore, this first thyristor switch 104 and this first auxiliary relay switch 106 of sequentially closed conducting.So, this main power source V1 is by 10 pairs of these loads of this main power circuit device, 40 power supplies, to complete the power supply program of switching this main power source V1.
Be worth mentioning, in this main power source V1 and this stand-by power supply V2 switching power supply process, provide those to drive the sequencing control of signal by this control unit 30, reaching the switching controls of break-before-make (break before make), and realize the uninterrupted harmony of switching between different input powers.Moreover, by conducting or the cut-off order to this first thyristor switch 104 and this first auxiliary relay switch 106 (or this second thyristor switch 204 and this second auxiliary relay switch 206), make this first auxiliary relay switch 106 (or second auxiliary relay switch 206) that bypass (bypass) path is provided, to reduce widely the conducting loss of this first thyristor switch 104 (or this second thyristor switch 204).
See also Fig. 6, have the flow chart of the control of power supply system method of power supply automatic switching function for the present invention.This electric power system provides a main power source current supply circuit, a stand-by power supply current supply circuit and a load circuit, is electrically connected respectively a main power source, a stand-by power supply and a load.The control method of this electric power system comprises the following step: provide a main power circuit device, the one first thyristor switch (S100) that has one first main relay switch and electrically be connected in series with this first main relay switch.Wherein, this main power circuit device is electrically connected by a main power source current supply circuit and a main power source, and is electrically connected by a load circuit and a load.In addition, this main power circuit device more comprises the one first auxiliary relay switch that electrically is connected in parallel with this first thyristor switch, a bypass (bypass) path to be provided and to reduce the conducting loss of this first thyristor switch.Provide a stand-by power supply loop apparatus that electrically is connected in parallel with this main power circuit device, the one second thyristor switch (S200) that has one second main relay switch and electrically be connected in series with this second main relay switch.Wherein, this stand-by power supply loop apparatus saturating one this stand-by power supply current supply circuit and a stand-by power supply are electrically connected, and are electrically connected by this load circuit and this load.In addition, this stand-by power supply loop apparatus more comprises the one second auxiliary relay switch that electrically is connected in parallel with this second thyristor switch, a bypass (bypass) path to be provided and to reduce the conducting loss of this second thyristor switch.One control unit is provided, produces a plurality of driving signals, to control conducting or the cut-off (S300) of this first main relay switch, this first thyristor switch, this second main relay switch and this second thyristor switch.When this main power source can normal power supply, this first main relay switch of this control unit conducting and this first thyristor switch, make this main power source by this main power circuit device to this load supplying (S400).In an applicable embodiment, when this main power source can normal power supply, this controller sequentially produces the first main relay switching drive signal of a high levle and the first thyristor switching drive signal of a high levle, and this first main relay switch of sequentially closed conducting and this first thyristor switch make this main power source pass through this main power circuit device to this load supplying.And when this main power source was completed this load supplying, this control unit produced the second main relay switching drive signal of a high levle again, and this second main relay switch of closed conducting makes this stand-by power supply of importing be the power supply state of awaiting orders.In addition, in another applicable embodiment, when this main power source can normal power supply, this controller sequentially produces the first main relay switching drive signal of a high levle, the first thyristor switching drive signal of a high levle and the first auxiliary relay switching drive signal of a high levle, and this first main relay switch of sequentially closed conducting, this first thyristor switch and this first auxiliary relay switch make this main power source pass through this main power circuit device to this load supplying.And when this main power source was completed this load supplying, this control unit produced the second main relay switching drive signal of a high levle again, and this second main relay switch of closed conducting makes this stand-by power supply of importing be the power supply state of awaiting orders.
When this main power source can't normal power supply, this second main relay switch of this control unit conducting and this second thyristor switch, make this stand-by power supply by this stand-by power supply loop apparatus to this load supplying (S500).In an applicable embodiment, when this main power source can't normal power supply, this control unit sequentially produces the first thyristor switching drive signal of a low level and the first main relay switching drive signal of a low level, and sequentially disconnect this first thyristor switch of cut-off and this first main relay switch, make this main power source stop this load supplying.And, after this first main relay switch is completed the disconnection cut-off, this control unit produces this second thyristor switching drive signal of a high levle, and this second thyristor switch of closed conducting makes this stand-by power supply of switching pass through this stand-by power supply loop apparatus to this load supplying.In another applicable embodiment, when this main power source can't normal power supply, this control unit sequentially produces the first auxiliary relay switching drive signal of a low level, the first thyristor switching drive signal of a low level and the first main relay switching drive signal of a low level, and sequentially disconnect cut-off this first auxiliary relay switch, this first thyristor switch and this first main relay switch, make this main power source stop this load supplying.And, after this first main relay switch is completed the disconnection cut-off, this control unit sequentially produces this second thyristor switching drive signal of a high levle and this second auxiliary relay switching drive signal of a high levle, and this second thyristor switch of sequentially closed conducting and this second auxiliary relay switch make this stand-by power supply of switching pass through this stand-by power supply loop apparatus to this load supplying.
In sum, the present invention has advantages of following:
1, thyristor (SCR) has the ability that can bear larger immediate current, can have to replace relay (relay) restriction of mechanical endurance, can avoid relay switch when switching, if the instantaneous large-current relay switch of flowing through is arranged, the electric arc that produces under non-control (electric arc), the damage of relay switch contact will be caused, after also making repeatedly switching use, to cause relay switch to open and close the anxiety of inefficacys, and cause this main power source V1 and this stand-by power supply V2 handoff failure or the thing generation of action;
2, this first main relay switch 102 plays the part of with this second main relay switch 202 key player who keeps this main power source V1 and this stand-by power supply V2 handoff procedure harmony; And
3, can utilize this first auxiliary relay switch 106 (or this second auxiliary relay switch 206) this first thyristor switch 104 (or this first thyristor switch 204) that is electrically connected in parallel, so that bypass (bypass) path to be provided, make the conducting loss that reduces widely this first thyristor switch 104 (or this first thyristor switch 204), the efficient that automaticallyes switch to improve power supply.
The above; only for the detailed description of preferred embodiment of the present invention and graphic; feature of the present invention is not limited to this; be not to limit the present invention; all scopes of the present invention should be as the criterion with following scope; all closing in the embodiment of the spirit variation similar with it of claim protection range of the present invention; all should be contained in category of the present invention; anyly be familiar with this skill person in the field of the invention, can think easily and variation or adjust and all can be encompassed in following claim protection range of the present invention.
Claims (20)
1. the power supply with power supply automatic switching function is united, and a load is provided the power supply of not cutting off the power supply, this electric power system comprises:
One main power circuit device is electrically connected with a main power source; This main power circuit device comprises:
One first main relay switch;
One first thyristor switch electrically is connected in series this first main relay switch and this load;
One stand-by power supply loop apparatus is electrically connected with a stand-by power supply, and electrically is connected in parallel with this main power circuit device; This stand-by power supply loop apparatus comprises:
One second main relay switch;
One second thyristor switch electrically is connected in series this second main relay switch and this load; And
One control unit produces a plurality of driving signals, to control conducting or the cut-off of this first main relay switch, this first thyristor switch, this second main relay switch and this second thyristor switch.
2. electric power system as claimed in claim 1, wherein this electric power system more comprises a main power source current supply circuit, a stand-by power supply current supply circuit and a load circuit; This main power circuit device is electrically connected by this main power source current supply circuit and this main power source; This stand-by power supply loop apparatus is electrically connected by this stand-by power supply current supply circuit and this stand-by power supply; This main power circuit device and this stand-by power supply loop apparatus are electrically connected by this load circuit and this load; Wherein, when this main power source can normal power supply, this first main relay switch of this control unit conducting and this first thyristor switch, make this main power source by this main power circuit device to this load supplying; When this main power source can't normal power supply, this second main relay switch of this control unit conducting and this second thyristor switch, make this stand-by power supply by this stand-by power supply loop apparatus to this load supplying.
3. electric power system as claimed in claim 2, wherein this main power circuit device more comprises one first auxiliary relay switch, this the first auxiliary relay switch this first thyristor switch that electrically is connected in parallel is to provide a bypass path and to reduce the conducting loss of this first thyristor switch; This stand-by power supply loop apparatus more comprises one second auxiliary relay switch, and this second auxiliary relay switch this second thyristor switch that electrically is connected in parallel is to provide a bypass path and to reduce the conducting loss of this second thyristor switch.
4. electric power system as claimed in claim 2, wherein when this main power source can normal power supply, this controller sequentially produces the first main relay switching drive signal of a high levle and the first thyristor switching drive signal of a high levle, and this first main relay switch of sequentially closed conducting and this first thyristor switch make this main power source pass through this main power circuit device to this load supplying.
5. electric power system as claimed in claim 4, wherein when this main power source is completed this load supplying, this control unit produces the second main relay switching drive signal of a high levle again, and this second main relay switch of closed conducting makes this stand-by power supply of importing be the power supply state of awaiting orders.
6. electric power system as claimed in claim 2, wherein when this main power source can't normal power supply, this control unit sequentially produces the first thyristor switching drive signal of a low level and the first main relay switching drive signal of a low level, and sequentially disconnect this first thyristor switch of cut-off and this first main relay switch, make this main power source stop this load supplying.
7. electric power system as claimed in claim 6, wherein after this first main relay switch is completed the disconnection cut-off, this control unit produces this second thyristor switching drive signal of a high levle, and this second thyristor switch of closed conducting makes this stand-by power supply of switching pass through this stand-by power supply loop apparatus to this load supplying.
8. electric power system as claimed in claim 3, wherein when this main power source can normal power supply, this controller sequentially produces the first main relay switching drive signal of a high levle, the first thyristor switching drive signal of a high levle and the first auxiliary relay switching drive signal of a high levle, and this first main relay switch of sequentially closed conducting, this first thyristor switch and this first auxiliary relay switch make this main power source pass through this main power circuit device to this load supplying.
9. electric power system as claimed in claim 8, wherein when this main power source is completed this load supplying, this control unit produces the second main relay switching drive signal of a high levle again, and this second main relay switch of closed conducting makes this stand-by power supply of importing be the power supply state of awaiting orders.
10. electric power system as claimed in claim 3, wherein when this main power source can't normal power supply, this control unit sequentially produces the first auxiliary relay switching drive signal of a low level, the first thyristor switching drive signal of a low level and the first main relay switching drive signal of a low level, and sequentially disconnect cut-off this first auxiliary relay switch, this first thyristor switch and this first main relay switch, make this main power source stop this load supplying.
11. the electric power system as claim 10, wherein after this first main relay switch is completed the disconnection cut-off, this control unit sequentially produces this second thyristor switching drive signal of a high levle and this second auxiliary relay switching drive signal of a high levle, and this second thyristor switch of sequentially closed conducting and this second auxiliary relay switch make this stand-by power supply of switching pass through this stand-by power supply loop apparatus to this load supplying.
12. electric power system as claimed in claim 1, wherein this main power source is an alternating current or a rotor machine; This stand-by power supply is a UPS power supply.
13. the control method with electric power system of power supply automatic switching function comprises the following step:
(a) provide a main power circuit device, the one first thyristor switch that has one first main relay switch and electrically be connected in series with this first main relay switch; This main power circuit device is electrically connected by a main power source current supply circuit and a main power source, and is electrically connected by a load circuit and a load;
(b) provide a stand-by power supply loop apparatus that electrically is connected in parallel with this main power circuit device, the one second thyristor switch that has one second main relay switch and electrically be connected in series with this second main relay switch; This stand-by power supply loop apparatus is electrically connected by this stand-by power supply current supply circuit and a stand-by power supply, and is electrically connected by this load circuit and this load;
(c) provide a control unit, produce a plurality of driving signals, to control conducting or the cut-off of this first main relay switch, this first thyristor switch, this second main relay switch and this second thyristor switch;
(d) when this main power source can normal power supply, this first main relay switch of this control unit conducting and this first thyristor switch, make this main power source by this main power circuit device to this load supplying; And
(e) when this main power source can't normal power supply, this second main relay switch of this control unit conducting and this second thyristor switch, make this stand-by power supply by this stand-by power supply loop apparatus to this load supplying.
14. the control method as claim 13, wherein in step (a), this main power circuit device more comprises the one first auxiliary relay switch that electrically is connected in parallel with this first thyristor switch, a bypass path to be provided and to reduce the conducting loss of this first thyristor switch.
15. the control method as claim 13, wherein in step (b), this stand-by power supply loop apparatus more comprises the one second auxiliary relay switch that electrically is connected in parallel with this second thyristor switch, a bypass path to be provided and to reduce the conducting loss of this second thyristor switch.
16. the control method as claim 13, wherein when this main power source can normal power supply, this controller sequentially produces the first main relay switching drive signal of a high levle and the first thyristor switching drive signal of a high levle, and this first main relay switch of sequentially closed conducting and this first thyristor switch make this main power source pass through this main power circuit device to this load supplying; And when this main power source was completed this load supplying, this control unit produced the second main relay switching drive signal of a high levle again, and this second main relay switch of closed conducting makes this stand-by power supply of importing be the power supply state of awaiting orders.
17. the control method as claim 13, wherein when this main power source can't normal power supply, this control unit sequentially produces the first thyristor switching drive signal of a low level and the first main relay switching drive signal of a low level, and sequentially disconnect this first thyristor switch of cut-off and this first main relay switch, make this main power source stop this load supplying; And, after this first main relay switch is completed the disconnection cut-off, this control unit produces this second thyristor switching drive signal of a high levle, and this second thyristor switch of closed conducting makes this stand-by power supply of switching pass through this stand-by power supply loop apparatus to this load supplying.
18. the control method as claim 14, wherein when this main power source can normal power supply, this controller sequentially produces the first main relay switching drive signal of a high levle, the first thyristor switching drive signal of a high levle and the first auxiliary relay switching drive signal of a high levle, and this first main relay switch of sequentially closed conducting, this first thyristor switch and this first auxiliary relay switch make this main power source pass through this main power circuit device to this load supplying; And when this main power source was completed this load supplying, this control unit produced the second main relay switching drive signal of a high levle again, and this second main relay switch of closed conducting makes this stand-by power supply of importing be the power supply state of awaiting orders.
19. the control method as claim 14, when this main power source can't normal power supply, this control unit sequentially produces the first auxiliary relay switching drive signal of a low level, the first thyristor switching drive signal of a low level and the first main relay switching drive signal of a low level, and sequentially disconnect cut-off this first auxiliary relay switch, this first thyristor switch and this first main relay switch, make this main power source stop this load supplying; And, after this first main relay switch is completed the disconnection cut-off, this control unit sequentially produces this second thyristor switching drive signal of a high levle and this second auxiliary relay switching drive signal of a high levle, and this second thyristor switch of sequentially closed conducting and this second auxiliary relay switch make this stand-by power supply of switching pass through this stand-by power supply loop apparatus to this load supplying.
20. as the control method of claim 13, wherein this main power source is an alternating current or a rotor machine; This stand-by power supply is a UPS power supply.
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