CN103872759A - Change-over judging method and device of automatic change-over switch electric appliance controller - Google Patents
Change-over judging method and device of automatic change-over switch electric appliance controller Download PDFInfo
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Abstract
The invention relates to a change-over judging method and device of an automatic change-over switch electric appliance controller. The change-over judging method includes the following steps: (1) collecting the current amplitude, the voltage amplitude and the phase difference between the voltage and the current of a main power source during current working, (2) carrying out conversion computing on the collected current amplitude, the collected voltage amplitude and the collected phase difference between the voltage and the current to obtain the current value, the voltage value and the harmonic content of the main power source during current working, (3) judging the current working state of the main power source according to the current value, the voltage value and the harmonic content which are obtained through conversion computing, and (4) detecting the working state of an emergency power source when it is determined that the main power source is in the fault state according to a working state reference value (please see the specifications for the formula), and switching an automatic change-over switch electric appliance to be in the emergency power source power supply state when the emergency power source is in the normal state. The change-over judging method and device are convenient to operate and high in automation degree, the automatic change-over switch change-over accuracy and the automatic change-over switch change-over reliability are improved, and the power use safety is guaranteed.
Description
Technical field
The present invention relates to a kind of method of discrimination and device, especially a kind of conversion method of discrimination and device of automatic transfer switching electric appliance controller, belong to the technical field of automatic change-over.
Background technology
Automatic transfer switching electric appliance is mainly used in the power consumption equipment of some important, unsuitable power-off.Automatic transfer switching electric appliance has two-way inlet wire, i.e. two-way power supply (road is main power source, and a road is stand-by power supply), and automatic transfer switching electric appliance arrives power consumption equipment by a road outlet.In the time that main power source exists fault, automatic transfer switching electric appliance need to automatically switch to stand-by power supply by the power supply of power consumption equipment.
Existing automatic transfer switching electric appliance controller only relies on the voltage height of differentiating main power source, stand-by power supply as the switch foundation of conversion automatically, and under many circumstances, because adopt the reasons such as frequency converter can produce stronger humorous wave interference by electric loading, make automatic transfer switching electric appliance controller lose accuracy to the measurement of voltage parameter, even differ greatly, thereby often cause automatic change-over to judge by accident, cause switch misoperation, have a strong impact on the normal electricity consumption in some important electricity consumption places such as hospital, even endanger people life property safety.
Summary of the invention
The object of the invention is to overcome the deficiencies in the prior art, conversion method of discrimination and device that a kind of automatic transfer switching electric appliance controller is provided, it is easy to operate, and automaticity is high, improve precision and the reliability of automatic change-over conversion, guarantee Electrical Safety.
According to technical scheme provided by the invention, a kind of conversion method of discrimination of automatic transfer switching electric appliance controller, described conversion method of discrimination comprises the steps:
Phase difference between S1, current amplitude, voltage magnitude and voltage, the electric current of collection main power source in the time of work at present;
S2, current value, magnitude of voltage and harmonic content when the phase difference conversion between the above-mentioned current amplitude collecting, voltage magnitude and voltage, electric current is calculated to main power source work at present;
S3, the current value, magnitude of voltage and the harmonic content that calculate according to above-mentioned conversion judge the operating state that main power source is current, and the pass of the operating state that main power source is current and current value, magnitude of voltage and harmonic content is:
Pd＝{[(UL-Ue)/U3]/Urat}*Wu+[(IL-Ie)/Ie]*Wi+Ph*Wh
Wherein, Pd is operating state reference value, magnitude of voltage when UL is main power source work at present, the rated voltage that Ue is main power source, Urat is overvoltage coefficient, current value when IL is main power source work at present, Ie is the load current value of main power source, and Ph is harmonic content, and Wu is voltage coefficient, Wi is current coefficient, and Wh is harmonic constant;
S4, in the time determining main power source in malfunction according to operating state reference value Pd, detect the operating state of stand-by power supply, when stand-by power supply is during in normal condition, automatic transfer switching electric appliance is switched to the power supply state of stand-by power supply.
In described step S4, in the time of operating state reference value Pd > 1, determine that main power source is in malfunction; Detect when stand-by power supply, when the voltage of stand-by power supply is during in normal range (NR), stand-by power supply is in normal condition.
In described step S4, when stand-by power supply is during in normal condition, after the delay time of setting, automatic transfer switching electric appliance is switched to the power supply state of stand-by power supply.
A kind of conversion discriminating gear of automatic transfer switching electric appliance controller, comprise analysis processor, the input of described analysis processor is connected with main power voltage Acquisition Circuit, backup power source voltage Acquisition Circuit and mains current sample circuit, and the output of analysis processor is connected with main power source divide-shut brake drive circuit and stand-by power supply divide-shut brake drive circuit; Analysis processor obtains the phase difference between current amplitude, voltage magnitude and voltage, the electric current of main power source under work at present state by main power voltage Acquisition Circuit, mains current sample circuit; Current value, magnitude of voltage and harmonic content when the phase difference conversion between above-mentioned current amplitude, voltage magnitude and voltage, electric current is calculated main power source work at present by analysis processor; Current value, magnitude of voltage and the harmonic content of analysis processor during according to main power source work at present, judges the operating state of main power source; When main power source is in fault and stand-by power supply during in normal condition, analysis processor switches to automatic transfer switching electric appliance by stand-by power supply divide-shut brake drive circuit the power supply state of stand-by power supply.
Current value, magnitude of voltage and harmonic content that described analysis processor calculates according to above-mentioned conversion judge the operating state that main power source is current, and the pass of the operating state that main power source is current and current value, magnitude of voltage and harmonic content is:
Pd＝{[(UL-Ue)/U3]/Urat}*Wu+[(IL-Ie)/Ie]*Wi+Ph*Wh
Wherein, Pd is operating state reference value, magnitude of voltage when UL is main power source work at present, the rated voltage that Ue is main power source, Urat is overvoltage coefficient, current value when IL is main power source work at present, Ie is the load current value of main power source, and Ph is harmonic content, and Wu is voltage coefficient, Wi is current coefficient, and Wh is harmonic constant;
Described analysis processor is also connected with time delay Acquisition Circuit, in analysis processor, set delay time by time delay Acquisition Circuit, after the delay time of setting, analysis processor switches to automatic transfer switching electric appliance by stand-by power supply divide-shut brake drive circuit the power supply state of stand-by power supply.
The input of described analysis processor is connected with button inputting circuits, and the output of analysis processor is connected with indicator light and LCDs.
Described analysis processor is connected with RS485 communication interface.Described main power voltage Acquisition Circuit, backup power source voltage Acquisition Circuit are by overvoltage protector and the first external terminal sub-connection.
Advantage of the present invention: current value, magnitude of voltage and the harmonic content when main power source is worked determined the operating state of main power source, when main power source is during in fault, automatic transfer switching electric appliance can be switched to the power supply state of stand-by power supply, easy to operate, automaticity is high, improve precision and the reliability of automatic change-over conversion, guarantee Electrical Safety.
Accompanying drawing explanation
Fig. 1 is structured flowchart of the present invention.
Fig. 2 is flow chart of the present invention.
Description of reference numerals: 1-analysis processor, 2-time delay Acquisition Circuit, 3-button inputting circuits, 4-the second external cabling terminal, 5-the first external cabling terminal, 6-mains current Acquisition Circuit, 7-overvoltage protector, 8-backup power source voltage Acquisition Circuit, 9-main power voltage Acquisition Circuit, 10-indicator light, 11-LCDs, 12-RS485 communication interface, 13-main power source divide-shut brake drive circuit and 14-stand-by power supply divide-shut brake drive circuit.
Embodiment
Below in conjunction with concrete drawings and Examples, the invention will be further described.
As shown in Figure 2: in order to avoid the mistake conversion operations of automatic transfer switching electric appliance, guarantee Electrical Safety, the present invention changes method of discrimination and comprises the steps:
Phase difference between S1, current amplitude, voltage magnitude and voltage, the electric current of collection main power source in the time of work at present;
In the embodiment of the present invention, voltage magnitude while obtaining main power source work at present by main power voltage sample circuit 9, current amplitude while obtaining main power source work at present by mains current sample circuit 6, can collect the phase difference of voltage, electric current by described main power voltage sample circuit 9 and mains current sample circuit 6 simultaneously, between voltage, electric current, the relation of phase difference can acquire by the technological means of the art routine, repeats no more herein.
S2, current value, magnitude of voltage and harmonic content when the phase difference conversion between the above-mentioned current amplitude collecting, voltage magnitude and voltage, electric current is calculated to main power source work at present;
Particularly, phase difference between current amplitude, voltage magnitude and voltage, the electric current of above-mentioned collection is analog quantity, above-mentioned analog quantity need to be converted to digital quantity and just can carry out follow-up analyzing and processing, phase difference between current amplitude, voltage magnitude and voltage, electric current is converted to digital quantity and can adopts the technological means of the art routine, repeat no more herein, after converting digital amount, current value, magnitude of voltage and harmonic content can obtain required main power source work at present time.
S3, the current value, magnitude of voltage and the harmonic content that calculate according to above-mentioned conversion judge the operating state that main power source is current, and the pass of the operating state that main power source is current and current value, magnitude of voltage and harmonic content is:
Pd＝{[(UL-Ue)/U3]/Urat}*Wu+[(IL-Ie)/Ie]*Wi+Ph*Wh
Wherein, Pd is operating state reference value, magnitude of voltage when UL is main power source work at present, the rated voltage that Ue is main power source, Urat is overvoltage coefficient, current value when IL is main power source work at present, Ie is the load current value of main power source, and Ph is harmonic content, and Wu is voltage coefficient, Wi is current coefficient, and Wh is harmonic constant; In the time calculating, in the time that certain measured value is less than corresponding rated value, the calculated value of this part is directly replaced with 0.
Usually, voltage coefficient Wu can be taken as 1, is mainly due to without harmonic wave, and in the situation without overcurrent, voltage height is the switching action of determine switch directly.Current coefficient Wi can be taken as 0.2, the in the situation that of overcurrent, can cause voltage drop, therefore need add that the control number causing because of the factor of electric current declines, harmonic constant Wh can be taken as-0.2, and because harmonic wave is substantially contrary with the impact of overcurrent on the impact of voltage, harmonic wave can cause that voltage peak raises.In the specific implementation, voltage coefficient Wu, current coefficient Wi and harmonic constant Wh can carry out correspondence adjustment as required, as long as guarantee that each weight meets the operational environment of main power source.Current value, magnitude of voltage and the harmonic content of the present invention when main power source is worked carried out comprehensively, accurately to judge the operating state of main power source, thereby improves the reliability that main power source operating state is switched.
S4, in the time determining main power source in malfunction according to operating state reference value Pd, detect the operating state of stand-by power supply, when stand-by power supply is during in normal condition, automatic transfer switching electric appliance is switched to the power supply state of stand-by power supply.
Particularly, in the time of operating state reference value Pd > 1, determine that main power source is in malfunction; Detect when stand-by power supply, when the voltage of stand-by power supply is during in normal range (NR), stand-by power supply is in normal condition.Operating state reference value Pd is less than at 1 o'clock, can determine that main power source is in normal operating conditions.In the embodiment of the present invention, for the operating state of stand-by power supply, can, only by detecting the voltage of stand-by power supply, when the voltage of stand-by power supply is in the scope of setting, automatic transfer switching electric appliance can be switched to the power supply state of stand-by power supply.
Further, when stand-by power supply is during in normal condition, after the delay time of setting, automatic transfer switching electric appliance is switched to the power supply state of stand-by power supply.In the embodiment of the present invention, setting delay time, is mainly for fear of the misoperation to main power source and stand-by power supply switching, guarantees stability and the reliability of main power source work.
As shown in Figure 1, a kind of conversion discriminating gear of automatic transfer switching electric appliance controller, comprise analysis processor 1, the input of described analysis processor 1 is connected with main power voltage Acquisition Circuit 9, backup power source voltage Acquisition Circuit 8 and mains current sample circuit 6, and the output of analysis processor 1 is connected with main power source divide-shut brake drive circuit 13 and stand-by power supply divide-shut brake drive circuit 14; Analysis processor 1 obtains the phase difference between current amplitude, voltage magnitude and voltage, the electric current of main power source under work at present state by main power voltage Acquisition Circuit 9, mains current sample circuit 6; Current value, magnitude of voltage and harmonic content when the phase difference conversion between above-mentioned current amplitude, voltage magnitude and voltage, electric current is calculated main power source work at present by analysis processor 1; Current value, magnitude of voltage and the harmonic content of analysis processor 1 during according to main power source work at present, judges the operating state of main power source; When main power source is in fault and stand-by power supply during in normal condition, analysis processor 1 switches to automatic transfer switching electric appliance by stand-by power supply divide-shut brake drive circuit 14 power supply state of stand-by power supply.
Particularly, analysis processor 1 can adopt the conventional micro-chip processors such as single-chip microcomputer, analysis processor 1 between main power source, stand-by power supply, switch according to being mainly whether to have the situations such as overvoltage, under-voltage or dead electricity between main power source, stand-by power supply.In the time that analysis processor 1 determines that the operating state of main power source can not guarantee Electrical Safety, and in the situation that detection stand-by power supply is working properly, whole circuit is switched to the operating state of stand-by power supply.Gather the information of voltage that obtains main power source by main power voltage Acquisition Circuit 9, gather the information of voltage that obtains stand-by power supply by backup power source voltage sample circuit 8, obtain the current information of main power source by mains current sample circuit 6.Mains current sample circuit 6 generally can adopt current transformer, main power voltage Acquisition Circuit 9, backup power source voltage sample circuit 8 generally can be realized by voltage sensor or resistor voltage divider circuit, embodiment, by those skilled in the art of the present technique are known, specifically repeats no more.
Current value, magnitude of voltage and harmonic content that described analysis processor 1 calculates according to above-mentioned conversion judge the operating state that main power source is current, and the pass of the operating state that main power source is current and current value, magnitude of voltage and harmonic content is:
Pd＝{[(UL-Ue)/U3]/Urat}*Wu+[(IL-Ie)/Ie]*Wi+Ph*Wh
Wherein, Pd is operating state reference value, magnitude of voltage when UL is main power source work at present, the rated voltage that Ue is main power source, Urat is overvoltage coefficient, current value when IL is main power source work at present, Ie is the load current value of main power source, and Ph is harmonic content, and Wu is voltage coefficient, Wi is current coefficient, and Wh is harmonic constant;
Described analysis processor 1 is also connected with time delay Acquisition Circuit 2, by time delay Acquisition Circuit 2 to the interior setting delay time of analysis processor 1, after the delay time of setting, analysis processor 1 switches to automatic transfer switching electric appliance by stand-by power supply divide-shut brake drive circuit 14 power supply state of stand-by power supply.Usually, the delay time of time delay Acquisition Circuit 2 interior inputs is adjustable, and delay time can be 0～30 second, delay time is set and mainly prevents from may causing the dangerous of electricity consumption when power supply is switched to the state of stand-by power supply by main power source.Set by time delay Acquisition Circuit 2 technological means that delay time is the art routine, repeat no more herein.
The input of described analysis processor 1 is connected with button inputting circuits 3, and the output of analysis processor 1 is connected with indicator light 10 and LCDs 11.Can input other required information by button inputting circuits 3, can indicate the operating state of whole circuit by indicator light 10, can show by LCDs 11 information that output is relevant.
Described analysis processor 1 is connected with RS485 communication interface 12.Analysis processor 1 is connected with the second external cabling terminal 4 by RS485 communication interface 12, and analysis processor 1 can carry out exchanges data with outside communication apparatus by RS485 communication interface 12 and the second external cabling terminal 4.In the embodiment of the present invention, the second external cabling terminal 4 is also connected with main power source divide-shut brake drive circuit 13 and stand-by power supply divide-shut brake drive circuit 14, and main power source divide-shut brake drive circuit 13 and stand-by power supply divide-shut brake drive circuit 14 are connected with automatic transfer switching electric appliance by the second external cabling terminal 4.
Described main power voltage Acquisition Circuit 9, backup power source voltage Acquisition Circuit 8 are connected with the first external cabling terminal 5 by overvoltage protector 7.In the embodiment of the present invention; mainly be connected with the power line of main power source, stand-by power supply by the first external cabling terminal 5; guarantee the reliability of main power voltage Acquisition Circuit 9, backup power source voltage Acquisition Circuit 8 by overvoltage protector 7, avoid overvoltage to cause the damage of whole circuit.
Current value, magnitude of voltage and the harmonic content of the present invention when main power source is worked determined the operating state of main power source, when main power source is during in fault, automatic transfer switching electric appliance can be switched to the power supply state of stand-by power supply, easy to operate, automaticity is high, improve precision and the reliability of automatic change-over conversion, guarantee Electrical Safety.
Claims (9)
1. a conversion method of discrimination for automatic transfer switching electric appliance controller, is characterized in that, described conversion method of discrimination comprises the steps:
(S1), gather the phase difference between current amplitude, voltage magnitude and voltage, the electric current of main power source in the time of work at present;
(S2) current value, magnitude of voltage and harmonic content while, the phase difference conversion between the above-mentioned current amplitude collecting, voltage magnitude and voltage, electric current being calculated to main power source work at present;
(S3), the current value, magnitude of voltage and the harmonic content that calculate according to above-mentioned conversion judge the operating state that main power source is current, the pass of the operating state that main power source is current and current value, magnitude of voltage and harmonic content is:
Pd＝{[(UL-Ue)/U3]/Urat}*Wu+[(IL-Ie)/Ie]*Wi+Ph*Wh
Wherein, Pd is operating state reference value, magnitude of voltage when UL is main power source work at present, the rated voltage that Ue is main power source, Urat is overvoltage coefficient, current value when IL is main power source work at present, Ie is the load current value of main power source, and Ph is harmonic content, and Wu is voltage coefficient, Wi is current coefficient, and Wh is harmonic constant;
(S4), in the time determining main power source in malfunction according to operating state reference value Pd, detect the operating state of stand-by power supply, when stand-by power supply is during in normal condition, automatic transfer switching electric appliance is switched to the power supply state of stand-by power supply.
2. the conversion method of discrimination of automatic transfer switching electric appliance controller according to claim 1, is characterized in that: in described step (S4), in the time of operating state reference value Pd > 1, determine that main power source is in malfunction; Detect when stand-by power supply, when the voltage of stand-by power supply is during in normal range (NR), stand-by power supply is in normal condition.
3. the conversion method of discrimination of automatic transfer switching electric appliance controller according to claim 1, it is characterized in that: in described step (S4), when stand-by power supply is during in normal condition, after the delay time of setting, automatic transfer switching electric appliance is switched to the power supply state of stand-by power supply.
4. the conversion discriminating gear of an automatic transfer switching electric appliance controller, comprise analysis processor (1), it is characterized in that: the input of described analysis processor (1) is connected with main power voltage Acquisition Circuit (9), backup power source voltage Acquisition Circuit (8) and mains current sample circuit (6), and the output of analysis processor (1) is connected with main power source divide-shut brake drive circuit (13) and stand-by power supply divide-shut brake drive circuit (14); Analysis processor (1) obtains the phase difference between current amplitude, voltage magnitude and voltage, the electric current of main power source under work at present state by main power voltage Acquisition Circuit (9), mains current sample circuit (6); Current value, magnitude of voltage and harmonic content when the phase difference conversion between above-mentioned current amplitude, voltage magnitude and voltage, electric current is calculated main power source work at present by analysis processor (1); Current value, magnitude of voltage and the harmonic content of analysis processor (1) during according to main power source work at present, judges the operating state of main power source; When main power source is in fault and stand-by power supply during in normal condition, analysis processor (1) switches to automatic transfer switching electric appliance by stand-by power supply divide-shut brake drive circuit (14) power supply state of stand-by power supply.
5. the conversion discriminating gear of automatic transfer switching electric appliance controller according to claim 4, it is characterized in that: current value, magnitude of voltage and harmonic content that described analysis processor (1) calculates according to above-mentioned conversion judge the operating state that main power source is current, and the pass of the operating state that main power source is current and current value, magnitude of voltage and harmonic content is:
Pd＝{[(UL-Ue)/U3]/Urat}*Wu+[(IL-Ie)/Ie]*Wi+Ph*Wh
Wherein, Pd is operating state reference value, magnitude of voltage when UL is main power source work at present, the rated voltage that Ue is main power source, Urat is overvoltage coefficient, current value when IL is main power source work at present, Ie is the load current value of main power source, and Ph is harmonic content, and Wu is voltage coefficient, Wi is current coefficient, and Wh is harmonic constant.
6. the conversion discriminating gear of automatic transfer switching electric appliance controller according to claim 4, it is characterized in that: described analysis processor (1) is also connected with time delay Acquisition Circuit (2), in analysis processor (1), set delay time by time delay Acquisition Circuit (2), after the delay time of setting, analysis processor (1) switches to automatic transfer switching electric appliance by stand-by power supply divide-shut brake drive circuit (14) power supply state of stand-by power supply.
7. the conversion discriminating gear of automatic transfer switching electric appliance controller according to claim 4, it is characterized in that: the input of described analysis processor (1) is connected with button inputting circuits (3), the output of analysis processor (1) is connected with indicator light (10) and LCDs (11).
8. the conversion discriminating gear of automatic transfer switching electric appliance controller according to claim 4, is characterized in that: described analysis processor (1) is connected with RS485 communication interface (12).
9. the conversion discriminating gear of automatic transfer switching electric appliance controller according to claim 4, is characterized in that: described main power voltage Acquisition Circuit (9), backup power source voltage Acquisition Circuit (8) are connected with the first external cabling terminal (5) by overvoltage protector (7).
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| CN108631289A (en) * | 2018-08-24 | 2018-10-09 | 广东好太太科技集团股份有限公司 | A kind of power input protection circuit of intelligent door lock |
| CN108828984A (en) * | 2018-06-12 | 2018-11-16 | 国核电力规划设计研究院有限公司 | Control device |
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| CN113586364A (en) * | 2021-08-27 | 2021-11-02 | 西安热工研究院有限公司 | Device, method and system for detecting yaw speed fault of fan yaw system |
| CN116780914A (en) * | 2023-06-19 | 2023-09-19 | 深圳市安科讯实业有限公司 | Hybrid switch mode power supply conversion method and device |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105305597A (en) * | 2014-07-01 | 2016-02-03 | 同济汽车设计研究院有限公司 | Power supply system and method thereof |
| CN107487214A (en) * | 2017-07-29 | 2017-12-19 | 友邦电气（平湖）股份有限公司 | New-energy automobile charging pile at a slow speed |
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| CN108631289A (en) * | 2018-08-24 | 2018-10-09 | 广东好太太科技集团股份有限公司 | A kind of power input protection circuit of intelligent door lock |
| CN112216173A (en) * | 2020-09-30 | 2021-01-12 | 国网冀北电力有限公司管理培训中心 | Alternating current-direct current power supply simulation system |
| CN112216173B (en) * | 2020-09-30 | 2022-08-02 | 国网冀北电力有限公司管理培训中心 | Alternating current-direct current power supply simulation system |
| CN113586364A (en) * | 2021-08-27 | 2021-11-02 | 西安热工研究院有限公司 | Device, method and system for detecting yaw speed fault of fan yaw system |
| CN116780914A (en) * | 2023-06-19 | 2023-09-19 | 深圳市安科讯实业有限公司 | Hybrid switch mode power supply conversion method and device |
| CN116780914B (en) * | 2023-06-19 | 2024-02-27 | 深圳市安科讯实业有限公司 | Hybrid switch mode power supply conversion method and device |
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| CN103872759B (en) | 2016-01-20 |
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