CN103872759B - The conversion method of discrimination of automatic transfer switching electric appliance controller and device - Google Patents
The conversion method of discrimination of automatic transfer switching electric appliance controller and device Download PDFInfo
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Abstract
The present invention relates to a kind of conversion method of discrimination and device of automatic transfer switching electric appliance controller, it comprises the steps: the phase difference between S1, the current amplitude of collection main power source when work at present, voltage magnitude and voltage, electric current; Phase difference conversion between S2, the current amplitude, voltage magnitude and the voltage that collect above-mentioned, electric current calculates current value, magnitude of voltage and harmonic content during 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, S4, when according to operating state reference value
when determining that main power source is in malfunction, detect the operating state of stand-by power supply, when stand-by power supply is in normal condition, automatic transfer switching electric appliance is switched to the power supply state of stand-by power supply.The present invention is easy to operate, and automaticity is high, improves precision and the reliability of automatic change-over conversion, guarantees Electrical Safety.
Description
Technical field
The present invention relates to a kind of method of discrimination and device, especially a kind of conversion method of discrimination of automatic transfer switching electric appliance controller and device, 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 passes through a road outlet to power consumption equipment.When main power source exists fault, automatic transfer switching electric appliance needs the power supply of power consumption equipment to automatically switch to stand-by power supply.
The foundation that existing automatic transfer switching electric appliance controller only relies on differentiation main power source, the voltage levels of stand-by power supply is changed automatically as switch, and under many circumstances, stronger humorous wave interference can be produced because adopting the reasons such as frequency converter by electric loading, the measurement of automatic transfer switching electric appliance controller to voltage parameter is made to lose accuracy, even differ greatly, thus 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, there is provided a kind of conversion method of discrimination and device of automatic transfer switching electric appliance controller, 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, the current amplitude of collection main power source when work at present, voltage magnitude and voltage, electric current;
Phase difference conversion between S2, the current amplitude, voltage magnitude and the voltage that collect above-mentioned, electric current calculates current value, magnitude of voltage and harmonic content during 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:
Wherein,
for operating state reference value,
for magnitude of voltage during main power source work at present,
for the rated voltage of main power source,
for overvoltage coefficient,
for current value during main power source work at present,
for the load current value of main power source,
for harmonic content,
for voltage coefficient,
for current coefficient,
for harmonic constant;
S4, when according to operating state reference value
when determining that main power source is in malfunction, detect the operating state of stand-by power supply, when stand-by power supply is in normal condition, automatic transfer switching electric appliance is switched to the power supply state of stand-by power supply.
In described step S4, when operating state reference value
time, determine that main power source is in malfunction; When detecting stand-by power supply, when the voltage of stand-by power supply is in normal range (NR), then stand-by power supply is in normal condition.
In described step S4, when stand-by power supply is 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 the current amplitude of main power source under current operating state, voltage magnitude and voltage, electric current by main power voltage Acquisition Circuit, mains current sample circuit; Phase difference conversion between above-mentioned current amplitude, voltage magnitude and voltage, electric current is calculated current value, magnitude of voltage and harmonic content during main power source work at present by analysis processor; Analysis processor, according to current value, magnitude of voltage and harmonic content during 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 is in normal condition, automatic transfer switching electric appliance is switched to the power supply state of stand-by power supply by analysis processor by stand-by power supply divide-shut brake drive circuit.
The current value that described analysis processor calculates according to above-mentioned conversion, magnitude of voltage and harmonic content 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:
Wherein,
for operating state reference value,
for magnitude of voltage during main power source work at present,
for the rated voltage of main power source,
for overvoltage coefficient,
for current value during main power source work at present,
for the load current value of main power source,
for harmonic content,
for voltage coefficient,
for current coefficient,
for harmonic constant;
Described analysis processor is also connected with time delay Acquisition Circuit, in analysis processor, delay time is set by time delay Acquisition Circuit, after the delay time through setting, automatic transfer switching electric appliance is switched to the power supply state of stand-by power supply by analysis processor by stand-by power supply divide-shut brake drive circuit.
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 during by working to main power source, magnitude of voltage and harmonic content determine the operating state of main power source, when main power source is 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-second external cabling terminal, 5-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, the current amplitude of collection main power source when work at present, voltage magnitude and voltage, electric current;
In the embodiment of the present invention, voltage magnitude when obtaining main power source work at present by main power voltage sample circuit 9, current amplitude when obtaining main power source work at present by mains current sample circuit 6, the phase difference of voltage, electric current can be collected 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 be acquired by the technological means of the art routine, repeats no more herein.
Phase difference conversion between S2, the current amplitude, voltage magnitude and the voltage that collect above-mentioned, electric current calculates current value, magnitude of voltage and harmonic content during main power source work at present;
Particularly, phase difference between the current amplitude of above-mentioned collection, voltage magnitude and voltage, electric current is analog quantity, need above-mentioned analog quantity 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 the technological means that digital quantity can adopt the art routine, repeat no more herein, after converting digital amount, current value, magnitude of voltage and harmonic content during required main power source work at present can be obtained.
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:
Wherein,
for operating state reference value,
for magnitude of voltage during main power source work at present,
for the rated voltage of main power source,
for overvoltage coefficient,
for current value during main power source work at present,
for the load current value of main power source,
for harmonic content,
for voltage coefficient,
for current coefficient,
for harmonic constant; When calculating, when 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, mainly due to without harmonic wave, when without overcurrent, and the switching action of the direct determine switch of voltage levels.Current coefficient Wi can be taken as 0.2, when overcurrent, can cause voltage drop, therefore the domination number that the factor because of electric current that need add causes 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 voltage peak to raise.In the specific implementation, voltage coefficient Wu, current coefficient Wi and harmonic constant Wh can carry out correspondence adjustment as required, as long as ensure that each weight meets the operational environment of main power source.Current value when the present invention is by working to main power source, magnitude of voltage and harmonic content are carried out comprehensively, accurately to judge the operating state of main power source, thus improve the reliability switched main power source operating state.
S4, when according to operating state reference value
when determining that main power source is in malfunction, detect the operating state of stand-by power supply, when stand-by power supply is in normal condition, automatic transfer switching electric appliance is switched to the power supply state of stand-by power supply.
Particularly, when operating state reference value
time, determine that main power source is in malfunction; When detecting stand-by power supply, when the voltage of stand-by power supply is in normal range (NR), then stand-by power supply is in normal condition.When operating state reference value Pd is less than 1, then 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, only by detecting the voltage of stand-by power supply, when namely the voltage of stand-by power supply is in the scope set, 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 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, the misoperation mainly in order to avoid switching main power source and stand-by power supply, 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 the current amplitude of main power source under current operating state, voltage magnitude and voltage, electric current by main power voltage Acquisition Circuit 9, mains current sample circuit 6; Phase difference conversion between above-mentioned current amplitude, voltage magnitude and voltage, electric current is calculated current value, magnitude of voltage and harmonic content during main power source work at present by analysis processor 1; Analysis processor 1, according to current value, magnitude of voltage and harmonic content during 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 is in normal condition, automatic transfer switching electric appliance is switched to the power supply state of stand-by power supply by analysis processor 1 by stand-by power supply divide-shut brake drive circuit 14.
Particularly, analysis processor 1 can adopt the micro-chip processor that single-chip microcomputer etc. is conventional, switch between analysis processor 1 pair of main power source, stand-by power supply according to mainly whether there is the situations such as overvoltage, under-voltage or dead electricity between main power source, stand-by power supply.When analysis processor 1 determines that the operating state of main power source can not ensure Electrical Safety, and when detecting stand-by power supply and being working properly, whole circuit is switched to the operating state of stand-by power supply.Gathered the information of voltage obtaining main power source by main power voltage Acquisition Circuit 9, gathered the information of voltage obtaining stand-by power supply by backup power source voltage sample circuit 8, obtained 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, known by those skilled in the art of the present technique, 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:
Wherein,
for operating state reference value,
for magnitude of voltage during main power source work at present,
for the rated voltage of main power source,
for overvoltage coefficient,
for current value during main power source work at present,
for the load current value of main power source,
for harmonic content,
for voltage coefficient,
for current coefficient,
for harmonic constant;
Described analysis processor 1 is also connected with time delay Acquisition Circuit 2, in analysis processor 1, delay time is set by time delay Acquisition Circuit 2, after the delay time through setting, automatic transfer switching electric appliance is switched to the power supply state of stand-by power supply by analysis processor 1 by stand-by power supply divide-shut brake drive circuit 14.Usually, in time delay Acquisition Circuit 2, the delay time of input is adjustable, and delay time can be 0 ~ 30 second, arranges delay time and mainly prevents from may causing the dangerous of electricity consumption during state power supply being switched to 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.The information needed for other can be inputted by button inputting circuits 3, the operating state of whole circuit can be indicated by indicator light 10, by the information that LCDs 11 energy display translation 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 the communication apparatus of outside by RS485 communication interface 12 and the second external cabling terminal 4.In the embodiment of the present invention, 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; guaranteed 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 when the present invention is by working to main power source, magnitude of voltage and harmonic content determine the operating state of main power source, when main power source is 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 (8)
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) phase difference between the current amplitude of main power source when work at present, voltage magnitude and voltage, electric current, is gathered;
(S2) the phase difference conversion between the current amplitude, voltage magnitude and the voltage that, collect above-mentioned, electric current calculates current value, magnitude of voltage and harmonic content during main power source work at present;
(S3) current value, magnitude of voltage and the harmonic content that, according to above-mentioned conversion calculate 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)/Ue]/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, Ue is the rated voltage of main power source, and 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), when determining that main power source is in malfunction according to operating state reference value Pd, detecting the operating state of stand-by power supply, when stand-by power supply is in normal condition, automatic transfer switching electric appliance being 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), as operating state reference value Pd>1, determines that main power source is in malfunction; When detecting stand-by power supply, when the voltage of stand-by power supply is in normal range (NR), then 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 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 the current amplitude of main power source under current operating state, voltage magnitude and voltage, electric current by main power voltage Acquisition Circuit (9), mains current sample circuit (6); Phase difference conversion between above-mentioned current amplitude, voltage magnitude and voltage, electric current is calculated current value, magnitude of voltage and harmonic content during main power source work at present by analysis processor (1); Analysis processor (1), according to current value, magnitude of voltage and harmonic content during 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 is in normal condition, automatic transfer switching electric appliance is switched to the power supply state of stand-by power supply by analysis processor (1) by stand-by power supply divide-shut brake drive circuit (14);
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)/Ue]/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, Ue is the rated voltage of main power source, and 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.
5. 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), by time delay Acquisition Circuit (2) setting delay time in analysis processor (1), after the delay time through setting, automatic transfer switching electric appliance is switched to the power supply state of stand-by power supply by analysis processor (1) by stand-by power supply divide-shut brake drive circuit (14).
6. 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).
7. 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).
8. 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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| 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 |
| CN108828984B (en) * | 2018-06-12 | 2020-03-03 | 国核电力规划设计研究院有限公司 | Control device |
| 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 |
| 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 |
| CN113586364B (en) * | 2021-08-27 | 2023-03-21 | 西安热工研究院有限公司 | Device, method and system for detecting yaw speed fault of fan yaw system |
| 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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