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 invention relates to a method and a device for judging, in particular to a method and a device for judging conversion of an electric appliance controller of an automatic transfer switch, belonging to the technical field of automatic transfer switches.
Background
The automatic transfer switching device is mainly used for some important electric equipment which is not suitable for power failure. The automatic transfer switching device is provided with two incoming lines, namely two power supplies (one is a main power supply and the other is a standby power supply), and the automatic transfer switching device is led out to the electric equipment through the other line. When the main power supply has a fault, the automatic transfer switching equipment needs to automatically switch the power supply of the electric equipment to the standby power supply.
The existing automatic transfer switch electric appliance controller only depends on judging the voltage level of a main power supply and a standby power supply to be used as the basis for automatic switch transfer, and under many conditions, the electric load adopts a frequency converter and other reasons to generate stronger harmonic interference, so that the automatic transfer switch electric appliance controller loses the accuracy of voltage parameter measurement, even has a very long difference, thereby often causing the automatic transfer switch to generate misjudgment, causing switch misoperation, seriously influencing the normal electricity utilization of important electricity utilization places such as hospitals and the like, and even harming the life and property safety of people.
Disclosure of Invention
The invention aims to overcome the defects in the prior art, and provides a method and a device for judging the conversion of an automatic transfer switch electric appliance controller, which have the advantages of convenient operation, high automation degree, improvement on the conversion precision and reliability of the automatic transfer switch and guarantee on the electricity utilization safety.
According to the technical scheme provided by the invention, the conversion judging method of the automatic transfer switch electric appliance controller comprises the following steps:
s1, collecting the current amplitude and the voltage amplitude of the main power supply during the current work and the phase difference between the voltage and the current;
s2, converting and calculating the acquired current amplitude, voltage amplitude, and phase difference between voltage and current to obtain a current value, a voltage value and harmonic content of the main power supply during current working;
s3, judging the current working state of the main power supply according to the current value, the voltage value and the harmonic content obtained by the conversion calculation, wherein the relation between the current working state of the main power supply and the current value, the voltage value and the harmonic content is as follows:
wherein,is a reference value for the working condition,is the voltage value of the main power supply when the main power supply is currently working,is the nominal voltage of the main power supply,in order to be able to determine the overpressure factor,is the current value of the main power supply when the main power supply is currently working,is the rated current value of the main power supply,in order to be the content of the harmonic wave,in order to be a voltage coefficient of the voltage,in order to be a current coefficient,is a harmonic coefficient;
s4, when the reference value is based on the working stateAnd when the standby power supply is in a normal state, switching the automatic transfer switching device to the power supply state of the standby power supply.
In the step S4, when the working condition is the reference valueWhen the main power supply is in a fault state, determining that the main power supply is in a fault state; when the standby power supply is detected, when the voltage of the standby power supply is in a normal range, the standby power supply is in a normal state.
In step S4, when the standby power supply is in a normal state, the automatic transfer switching device is switched to the power supply state of the standby power supply after a set delay time.
A conversion discriminating device of an automatic transfer switch electric appliance controller comprises an analysis processor, wherein the input end of the analysis processor is connected with a main power supply voltage acquisition circuit, a standby power supply voltage acquisition circuit and a main power supply current sampling circuit, and the output end of the analysis processor is connected with a main power supply opening and closing drive circuit and a standby power supply opening and closing drive circuit; the analysis processor acquires the current amplitude and the voltage amplitude of the main power supply in the current working state and the phase difference between the voltage and the current through the main power supply voltage acquisition circuit and the main power supply current sampling circuit; the analysis processor converts and calculates the current amplitude, the voltage amplitude and the phase difference between the voltage and the current to obtain a current value, a voltage value and harmonic content of the main power supply during current working; the analysis processor judges the working state of the main power supply according to the current value, the voltage value and the harmonic content when the main power supply works currently; when the main power supply is in a fault state and the standby power supply is in a normal state, the analysis processor switches the automatic transfer switching device to the power supply state of the standby power supply through the standby power supply switching-on and switching-off driving circuit.
The analysis processor judges the current working state of the main power supply according to the current value, the voltage value and the harmonic content obtained by conversion calculation, and the relation between the current working state of the main power supply and the current value, the voltage value and the harmonic content is as follows:
wherein,is a reference value for the working condition,is the voltage value of the main power supply when the main power supply is currently working,is the nominal voltage of the main power supply,in order to be able to determine the overpressure factor,is the current value of the main power supply when the main power supply is currently working,is the rated current value of the main power supply,in order to be the content of the harmonic wave,in order to be a voltage coefficient of the voltage,in order to be a current coefficient,is a harmonic coefficient;
the analysis processor is also connected with the delay acquisition circuit, the delay acquisition circuit sets delay time in the analysis processor, and after the set delay time, the analysis processor switches the automatic transfer switching device to the power supply state of the standby power supply through the standby power supply switching-on and switching-off driving circuit.
The input end of the analysis processor is connected with the key input circuit, and the output end of the analysis processor is connected with the indicator lamp and the liquid crystal display screen.
And the analysis processor is connected with the RS485 communication interface. The main power supply voltage acquisition circuit and the standby power supply voltage acquisition circuit are connected with a first external wiring terminal through the overvoltage protector.
The invention has the advantages that: the working state of the main power supply is determined by the current value, the voltage value and the harmonic content when the main power supply works, when the main power supply is in fault, the automatic transfer switch electric appliance can be switched to the power supply state of the standby power supply, the operation is convenient, the automation degree is high, the transfer precision and reliability of the automatic transfer switch are improved, and the power utilization safety is ensured.
Drawings
FIG. 1 is a block diagram of the present invention.
FIG. 2 is a flow chart of the present invention.
Description of reference numerals: 1-an analysis processor, 2-a delay acquisition circuit, 3-a key input circuit, 4-a second external wiring terminal, 5-a first external wiring terminal, 6-a main power supply current acquisition circuit, 7-an overvoltage protector, 8-a standby power supply voltage acquisition circuit, 9-a main power supply voltage acquisition circuit, 10-an indicator lamp, 11-a liquid crystal display screen, 12-an RS485 communication interface, 13-a main power supply switching-on and switching-off drive circuit and 14-a standby power supply switching-on and switching-off drive circuit.
Detailed Description
The invention is further illustrated by the following specific figures and examples.
As shown in fig. 2: in order to avoid the error conversion operation of the automatic transfer switching device and ensure the safety of electricity utilization, the conversion judging method of the invention comprises the following steps:
s1, collecting the current amplitude and the voltage amplitude of the main power supply during the current work and the phase difference between the voltage and the current;
in the embodiment of the present invention, the voltage amplitude of the main power supply during the current operation is obtained through the main power supply voltage sampling circuit 9, the current amplitude of the main power supply during the current operation is obtained through the main power supply current sampling circuit 6, and simultaneously, the phase difference between the voltage and the current can be obtained through the main power supply voltage sampling circuit 9 and the main power supply current sampling circuit 6, and the relationship between the phase difference between the voltage and the current can be obtained through conventional technical means in the technical field, which is not described herein again.
S2, converting and calculating the acquired current amplitude, voltage amplitude, and phase difference between voltage and current to obtain a current value, a voltage value and harmonic content of the main power supply during current working;
specifically, the acquired current amplitude, voltage amplitude, and phase difference between voltage and current are analog quantities, and the analog quantities are converted into digital quantities to perform subsequent analysis, and the current amplitude, voltage amplitude, and phase difference between voltage and current are converted into digital quantities by conventional technical means in the technical field, which are not described herein any more, and after the digital quantities are converted, the current value, voltage value, and harmonic content of the required main power supply during current operation can be obtained.
S3, judging the current working state of the main power supply according to the current value, the voltage value and the harmonic content obtained by the conversion calculation, wherein the relation between the current working state of the main power supply and the current value, the voltage value and the harmonic content is as follows:
wherein,is a reference value for the working condition,is the voltage value of the main power supply when the main power supply is currently working,is the nominal voltage of the main power supply,in order to be able to determine the overpressure factor,is the current value of the main power supply when the main power supply is currently working,is the rated current value of the main power supply,in order to be the content of the harmonic wave,in order to be a voltage coefficient of the voltage,in order to be a current coefficient,is a harmonic coefficient; when a certain measured value is smaller than the corresponding rated value, the calculated value of the part is directly replaced by 0.
Generally, the voltage coefficient Wu can be 1, mainly because the voltage level directly determines the switching action of the switch under the condition of no harmonic wave and no overcurrent. The current coefficient Wi may be 0.2, and in the case of overcurrent, a voltage drop may be caused, so that a control number drop due to a factor of current may be added, and the harmonic coefficient Wh may be-0.2, since the influence of the harmonic on the voltage is substantially opposite to the influence of overcurrent, the harmonic may cause a voltage peak to rise. In specific implementation, the voltage coefficient Wu, the current coefficient Wi and the harmonic coefficient Wh can be correspondingly adjusted as required, as long as each weight is ensured to be in accordance with the working environment of the main power supply. The invention integrates the current value, the voltage value and the harmonic content when the main power supply works to accurately judge the working state of the main power supply, thereby improving the reliability of switching the working state of the main power supply.
S4, when the reference value is based on the working stateAnd when the standby power supply is in a normal state, switching the automatic transfer switching device to the power supply state of the standby power supply.
In particular, when operating state reference valuesWhen the main power supply is in a fault state, determining that the main power supply is in a fault state; when the standby power supply is detected, when the voltage of the standby power supply is in a normal range, the standby power supply is in a normal state. And when the working state reference value Pd is less than 1, determining that the main power supply is in a normal working state. In the embodiment of the invention, as for the working state of the standby power supply, the voltage of the standby power supply can be detected, namely, when the voltage of the standby power supply is in a set range, the automatic transfer switching device can be switched to the power supply state of the standby power supply.
Further, when the standby power supply is in a normal state, the automatic transfer switching device is switched to the power supply state of the standby power supply after the set delay time. In the embodiment of the invention, the delay time is set, so that the misoperation of switching the main power supply and the standby power supply is avoided, and the working stability and reliability of the main power supply are ensured.
As shown in fig. 1, a switching determination device for an automatic transfer switch electric controller includes an analysis processor 1, an input end of the analysis processor 1 is connected with a main power supply voltage acquisition circuit 9, a standby power supply voltage acquisition circuit 8 and a main power supply current sampling circuit 6, and an output end of the analysis processor 1 is connected with a main power supply switching-on and switching-off drive circuit 13 and a standby power supply switching-on and switching-off drive circuit 14; the analysis processor 1 acquires the current amplitude and the voltage amplitude of the main power supply in the current working state and the phase difference between the voltage and the current through the main power supply voltage acquisition circuit 9 and the main power supply current sampling circuit 6; the analysis processor 1 converts and calculates the current amplitude, the voltage amplitude and the phase difference between the voltage and the current to obtain a current value, a voltage value and harmonic content of the main power supply during current working; the analysis processor 1 judges the working state of the main power supply according to the current value, the voltage value and the harmonic content when the main power supply works currently; when the main power supply is in a fault state and the standby power supply is in a normal state, the analysis processor 1 switches the automatic transfer switching device to the power supply state of the standby power supply through the standby power supply switching-on and switching-off driving circuit 14.
Specifically, the analysis processor 1 may adopt a common micro-processing chip such as a single chip microcomputer, and the basis for switching between the main power supply and the standby power supply by the analysis processor 1 is mainly whether overvoltage, undervoltage or power loss exists between the main power supply and the standby power supply. When the analysis processor 1 determines that the working state of the main power supply can not ensure the safety of power utilization, and under the condition of detecting that the standby power supply works normally, the whole circuit is switched to the working state of the standby power supply. The voltage information of the main power supply is acquired and obtained through a main power supply voltage acquisition circuit 9, the voltage information of the standby power supply is acquired and obtained through a standby power supply voltage sampling circuit 8, and the current information of the main power supply is acquired through a main power supply current sampling circuit 6. The main power current sampling circuit 6 may generally adopt a current transformer, the main power voltage sampling circuit 9 and the standby power voltage sampling circuit 8 may generally be implemented by a voltage sensor or a resistance voltage dividing circuit, and the specific implementation manner is well known to those skilled in the art and is not described in detail.
The analysis processor 1 judges the current working state of the main power supply according to the current value, the voltage value and the harmonic content obtained by the conversion calculation, and the relation between the current working state of the main power supply and the current value, the voltage value and the harmonic content is as follows:
wherein,is a reference value for the working condition,is the voltage value of the main power supply when the main power supply is currently working,is the nominal voltage of the main power supply,in order to be able to determine the overpressure factor,is the current value of the main power supply when the main power supply is currently working,is the rated current value of the main power supply,in order to be the content of the harmonic wave,in order to be a voltage coefficient of the voltage,in order to be a current coefficient,is a harmonic coefficient;
the analysis processor 1 is also connected with the delay acquisition circuit 2, delay time is set in the analysis processor 1 through the delay acquisition circuit 2, and after the set delay time, the analysis processor 1 switches the automatic transfer switch electric appliance to a power supply state of a standby power supply through the standby power supply switching-on and switching-off driving circuit 14. Generally, the delay time input in the delay acquisition circuit 2 can be adjusted, the delay time can be 0-30 seconds, and the setting of the delay time mainly prevents unsafe power utilization which may be caused when the power supply is switched from a main power supply to a standby power supply. The setting of the delay time by the delay acquisition circuit 2 is a conventional technical means in the art, and is not described herein again.
The input end of the analysis processor 1 is connected with the key input circuit 3, and the output end of the analysis processor 1 is connected with the indicator light 10 and the liquid crystal display screen 11. Other required information can be input through the key input circuit 3, the working state of the whole circuit can be indicated through the indicator lamp 10, and the relevant information can be displayed and output through the liquid crystal display screen 11.
The analysis processor 1 is connected with an RS485 communication interface 12. The analysis processor 1 is connected with the second external wiring terminal 4 through the RS485 communication interface 12, and the analysis processor 1 can exchange data with external communication equipment through the RS485 communication interface 12 and the second external wiring terminal 4. In the embodiment of the invention, the second external connection terminal 4 is further connected with a main power supply opening and closing drive circuit 13 and a standby power supply opening and closing drive circuit 14, and the main power supply opening and closing drive circuit 13 and the standby power supply opening and closing drive circuit 14 are connected with the automatic transfer switch electrical appliance through the second external connection terminal 4.
And the main power supply voltage acquisition circuit 9 and the standby power supply voltage acquisition circuit 8 are connected with the first external wiring terminal 5 through the overvoltage protector 7. In the embodiment of the invention, the first external wiring terminal 5 is mainly connected with power lines of a main power supply and a standby power supply, and the overvoltage protector 7 ensures the reliability of a main power supply voltage acquisition circuit 9 and a standby power supply voltage acquisition circuit 8, so that the damage of the whole circuit caused by overvoltage is avoided.
The working state of the main power supply is determined by the current value, the voltage value and the harmonic content when the main power supply works, and when the main power supply is in failure, the automatic transfer switch electric appliance can be switched to the power supply state of the standby power supply, so that the automatic transfer switch electric appliance is convenient to operate, has high automation degree, improves the precision and the reliability of the transfer of the automatic transfer switch, and ensures the power utilization safety.
Claims (8)
1. A method for judging the conversion of an automatic transfer switch electric appliance controller is characterized by comprising the following steps:
(S1) acquiring the current amplitude and the voltage amplitude of the main power supply during the current work and the phase difference between the voltage and the current;
(S2) converting and calculating the acquired current amplitude, voltage and phase difference between the current to obtain the current value, voltage value and harmonic content of the main power supply during current working;
(S3), judging the current working state of the main power supply according to the current value, the voltage value and the harmonic content obtained by the conversion calculation, wherein the relation between the current working state of the main power supply and the current value, the voltage value and the harmonic content is as follows:
Pd＝{[(UL-Ue)/Ue]/Urat}*Wu+[(IL-Ie)/Ie]*Wi+Ph*Wh
wherein Pd is a working state reference value, UL is a voltage value of the main power supply when working currently, Ue is a rated voltage of the main power supply, Urat is an overvoltage coefficient, IL is a current value of the main power supply when working currently, Ie is a rated current value of the main power supply, Ph is harmonic content, Wu is a voltage coefficient, Wi is a current coefficient, and Wh is a harmonic coefficient;
and (S4), detecting the working state of the standby power supply when the main power supply is determined to be in the fault state according to the working state reference value Pd, and switching the automatic transfer switching device to the power supply state of the standby power supply when the standby power supply is in the normal state.
2. The method for discriminating switching of an electric appliance controller for an automatic transfer switch according to claim 1, wherein: in the step (S4), when the operating state reference value Pd >1, it is determined that the main power supply is in a failure state; when the standby power supply is detected, when the voltage of the standby power supply is in a normal range, the standby power supply is in a normal state.
3. The method for discriminating switching of an electric appliance controller for an automatic transfer switch according to claim 1, wherein: in the step (S4), when the standby power is in a normal state, the automatic transfer switching device is switched to a power supply state of the standby power after a set delay time.
4. A switching discrimination device of an automatic transfer switch electric appliance controller comprises an analysis processor (1), and is characterized in that: the input end of the analysis processor (1) is connected with the main power supply voltage acquisition circuit (9), the standby power supply voltage acquisition circuit (8) and the main power supply current sampling circuit (6), and the output end of the analysis processor (1) is connected with the main power supply opening and closing drive circuit (13) and the standby power supply opening and closing drive circuit (14); the analysis processor (1) acquires the current amplitude and the voltage amplitude of the main power supply in the current working state and the phase difference between the voltage and the current through the main power supply voltage acquisition circuit (9) and the main power supply current sampling circuit (6); the analysis processor (1) converts and calculates the current amplitude, the voltage amplitude and the phase difference between the voltage and the current to obtain a current value, a voltage value and harmonic content of the main power supply during current working; the analysis processor (1) judges the working state of the main power supply according to the current value, the voltage value and the harmonic content when the main power supply works currently; when the main power supply is in fault and the standby power supply is in a normal state, the analysis processor (1) switches the automatic transfer switching device to the power supply state of the standby power supply through the standby power supply switching-on and switching-off driving circuit (14);
the analysis processor (1) judges the current working state of the main power supply according to the current value, the voltage value and the harmonic content obtained by conversion calculation, and the relation between the current working state of the main power supply and the current value, the voltage value and the harmonic content is as follows:
Pd＝{[(UL-Ue)/Ue]/Urat}*Wu+[(IL-Ie)/Ie]*Wi+Ph*Wh
pd is a working state reference value, UL is a voltage value of the main power supply when the main power supply works currently, Ue is a rated voltage of the main power supply, Urat is an overvoltage coefficient, IL is a current value of the main power supply when the main power supply works currently, Ie is a rated current value of the main power supply, Ph is harmonic content, Wu is a voltage coefficient, Wi is a current coefficient, and Wh is a harmonic coefficient.
5. The changeover discriminating device of the automatic changeover switch electric appliance controller as claimed in claim 4, wherein: the analysis processor (1) is also connected with the delay acquisition circuit (2), delay time is set in the analysis processor (1) through the delay acquisition circuit (2), and after the set delay time, the analysis processor (1) switches the automatic transfer switch electric appliance to the power supply state of the standby power supply through the standby power supply switching-on and switching-off driving circuit (14).
6. The changeover discriminating device of the automatic changeover switch electric appliance controller as claimed in claim 4, wherein: the input end of the analysis processor (1) is connected with the key input circuit (3), and the output end of the analysis processor (1) is connected with the indicator lamp (10) and the liquid crystal display screen (11).
7. The changeover discriminating device of the automatic changeover switch electric appliance controller as claimed in claim 4, wherein: the analysis processor (1) is connected with the RS485 communication interface (12).
8. The changeover discriminating device of the automatic changeover switch electric appliance controller as claimed in claim 4, wherein: the main power supply voltage acquisition circuit (9) and the standby power supply voltage acquisition circuit (8) are connected with the first external wiring terminal (5) through the 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 |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101656430A (en) * | 2009-07-30 | 2010-02-24 | 杭州之江开关股份有限公司 | Automatic transfer switching equipment and control method |
| CN202488207U (en) * | 2012-02-22 | 2012-10-10 | 常熟开关制造有限公司(原常熟开关厂） | Intelligent automatic changer-over switch controller |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN203119606U (en) * | 2013-01-30 | 2013-08-07 | 苏州飞腾电器有限公司 | Intelligent dual-power supply automatic change-over switch controller |
-
2014
- 2014-03-26 CN CN201410118301.4A patent/CN103872759B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101656430A (en) * | 2009-07-30 | 2010-02-24 | 杭州之江开关股份有限公司 | Automatic transfer switching equipment and control method |
| CN202488207U (en) * | 2012-02-22 | 2012-10-10 | 常熟开关制造有限公司(原常熟开关厂） | Intelligent automatic changer-over switch controller |
Non-Patent Citations (1)
| Title |
|---|
| 双电源自动转换开关电网参数同步采样技术的分析与实现;项新建;《能源工程》;20070630;第17-21页 * |
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