CN217115719U - Low-voltage seamless uninterrupted power switching device - Google Patents
Low-voltage seamless uninterrupted power switching device Download PDFInfo
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- CN217115719U CN217115719U CN202123070819.XU CN202123070819U CN217115719U CN 217115719 U CN217115719 U CN 217115719U CN 202123070819 U CN202123070819 U CN 202123070819U CN 217115719 U CN217115719 U CN 217115719U
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Abstract
The utility model provides a seamless uninterrupted power switching device of low pressure, it includes multichannel low pressure alternating current branch road, multichannel inlet wire voltage electric current collection module, analog revolution digital circuit, CPU control circuit, multichannel remote signalling input circuit, multichannel remote control output circuit and warning output circuit, inlet wire voltage electric current collection module is used for gathering the voltage electric current signal of low pressure alternating current branch road, inlet wire voltage electric current collection module includes voltage acquisition module and current acquisition module, CPU control circuit is used for receiving the voltage electric current signal that voltage acquisition module gathered and current acquisition module gathered, multichannel remote signalling input circuit, multichannel remote control output circuit is connected with CPU control circuit respectively, CPU control circuit is connected with warning output circuit. Use the utility model discloses a multichannel current-voltage gathers, decides the output state of every remote control, can realize not having the power failure and change the operational mode to guarantee the power supply continuity, guaranteed the reliability of power supply and operating personnel's personal safety.
Description
Technical Field
The utility model relates to an electronic circuit technical field especially relates to a seamless uninterrupted power switching device of two transformer low pressures.
Background
In the prior art, with the development of economic society, two or more transformer stations in a transformer substation or a cell or a factory run simultaneously, and the independent operation or fault switching among a plurality of transformer stations makes the uninterrupted power state of a power supply system more important.
In terms of the prior art, the number of the low-voltage transformers is large under the condition that two or more low-voltage transformers supply power, when one low-voltage transformer fails, the other low-voltage transformer cannot be switched to a low-voltage line, and part of the low-voltage lines are in a power-off state. And if the low voltage is connected in parallel under the low voltage non-detection state, the low voltage side returns high voltage through the switch, and larger circulation current is caused to directly influence an alternating current power supply system in the station and even threaten the safety of the grounding transformer high voltage side. Which is a disadvantage of the prior art.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a realize not having a power failure and change the operational mode to guarantee the seamless uninterrupted power switching device of low pressure of power supply continuity.
In order to achieve the main purpose, the utility model provides a low-voltage seamless uninterrupted power switching device, which comprises a multi-path incoming line voltage and current collection module, an analog-to-digital circuit, a CPU control circuit, a multi-path remote signaling input circuit, a multi-path remote control output circuit and an alarm output circuit, wherein the incoming line voltage and current collection module is used for collecting the voltage and current signals of the low-voltage alternating current branch, the incoming line voltage and current collection module comprises a voltage collection module and a current collection module, the voltage collection module and the current collection module are respectively connected with the CPU control circuit, the CPU control circuit is used for receiving the voltage signals collected by the voltage collection module and the current signals collected by the current collection module, the multi-path remote signaling input circuit and the multi-path remote control output circuit are respectively connected with the CPU control circuit, the multi-channel remote signaling input circuit is used for receiving remote signaling signals, the CPU control circuit outputs remote control signals to the remote control output circuit, and the CPU control circuit is connected with the alarm output circuit and used for outputting alarm output signals to the alarm output circuit; the multi-channel remote control output circuit comprises 8 remote control outputs, each remote control output comprises a first resistor, a second resistor, a first capacitor, a first triode, a first diode and a relay, the first end of the first resistor is connected with OUT1, the second end of the first resistor is connected with the base of the first triode, the first end of the first capacitor is connected with the first end of the second resistor in series and then connected between the second end of the first resistor and the base of the first triode, the second end of the first capacitor is connected with the second end of the second resistor in series and then connected with the emitter of the first triode, the collector of the first triode is connected with the coil end of the relay, and the two ends of the first diode are connected with the coil end of the relay in parallel.
In a further scheme, the current collection module is a current transformer arranged on the low-voltage alternating current branch, and the voltage collection module is a voltage transformer arranged on the low-voltage alternating current branch.
In a further aspect, the low-voltage seamless uninterruptible power switching device further includes a trip switch, where the trip switch includes multiple sets of contacts and only one set of contacts is in a connected state at a time.
In a further scheme, the relay comprises a coil end and a plurality of normally open contacts, the normally open contacts of the relay are respectively connected with input contacts in the contacts of the selective tripping switch, and output contacts in the contacts of the selective tripping switch are respectively connected with the opening coils of the opening loops of the corresponding air switches.
In a further scheme, the relay is a multi-contact alternating current intermediate relay with an electromagnetic solenoid structure, and the rated voltage of the alternating current intermediate relay is AC 220V.
In a further scheme, the analog-to-digital conversion circuit comprises an AD7606 sampling chip, collected analog signals are subjected to two-stage RC filtering and then are connected to 8 analog quantity input pins of the AD7606 sampling chip, the 8 analog signals are synchronously converted into digital quantity signals with 16-bit resolution through the chip, and then the digital quantity signals are transmitted to the CPU control circuit.
In a further scheme, the CPU control circuit is a stm32 series single chip microcomputer.
In a further embodiment, the alarm output circuit includes a first amplifier IC1 and a second amplifier IC2, an inverting terminal of the first amplifier IC1 is connected to the CPU control circuit through a resistor R8, an inverting terminal of the first amplifier IC1 is connected to a seventh pin of the first amplifier IC1 through a resistor R1, a non-inverting terminal of the first amplifier IC1 is connected to ground through a second resistor R2 and a third resistor R3, a non-inverting terminal of the first amplifier IC1 is connected to a power supply through a resistor R9, a fourth pin of the first amplifier IC1 is connected to ground, a seventh pin of the first amplifier IC1 is connected to a sixth pin of the first amplifier IC1 through a sliding rheostat RB, a sixth pin of the first amplifier IC1 is connected to a non-inverting terminal of the second amplifier IC2 through a capacitor C1 and a diode D1, an inverting terminal of the second amplifier IC2 is connected to ground through a third resistor R3, and a non-inverting terminal of the second amplifier IC 3872 is connected to ground through a resistor R3646, the in-phase terminal of second amplifier IC2 is through first diode D1, fifth resistance R5 ground connection, second amplifier IC 2's fourth pin ground connection, second amplifier IC 2's seventh pin is connected with + VCC, second amplifier IC 2's sixth pin is connected with a triode VT's base through sixth resistance, triode VT's projecting pole ground connection, triode VT's collecting electrode passes through buzzer B power connection.
In a further scheme, the low-voltage seamless uninterrupted power switching device further comprises a liquid crystal interface display circuit and a key circuit, wherein the liquid crystal interface display circuit and the key circuit are respectively connected with the CPU control circuit.
Therefore, the utility model can acquire current and voltage in multiple paths, completely electrically isolate the high current and voltage, and detect the current and voltage condition of the line in time; the high-precision sampling chip is used for realizing the assembly and exchange of analog quantity and digital quantity; judging the state of each switch through multi-channel remote signaling input, and judging the logic state of the switch according to remote signaling definition input; through 8-channel remote control, the output state of each remote control is determined according to the analog input and remote signaling states; and the alarm can be controlled to give an alarm by monitoring the condition of the line in real time, and the abnormal condition of the line can be reflected to related workers in time.
Furthermore, the utility model discloses a low pressure closes the switching operation mode that closes a switch in the many switches that the ring will be selected after the ring is closed in the start-up, automatic jump and open and close, has not only avoided the emergence of instantaneous power failure's voltage flicker, has still guaranteed the reliability of power supply and operating personnel's personal safety.
Drawings
Fig. 1 is a schematic diagram of an embodiment of the low-voltage seamless uninterruptible power switching device of the present invention.
Fig. 2 is a schematic circuit diagram of a remote control output circuit in an embodiment of the low-voltage seamless uninterruptible power switching device of the present invention.
Fig. 3 is a schematic circuit diagram of a remote signaling input circuit in an embodiment of the low-voltage seamless uninterruptible power switching apparatus of the present invention.
Fig. 4 is a schematic circuit diagram of an analog-to-digital circuit in an embodiment of the low-voltage seamless uninterruptible power switching device of the present invention.
Fig. 5 is a schematic circuit diagram of a CPU control circuit in an embodiment of the low-voltage seamless uninterruptible power switching device of the present invention.
Fig. 6 is a schematic circuit diagram of an alarm output circuit in an embodiment of the low-voltage seamless uninterruptible power switching device of the present invention.
The present invention will be further explained with reference to the drawings and examples.
Detailed Description
In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the drawings of the embodiments of the present invention are combined below to clearly and completely describe the technical solution of the embodiments of the present invention. It is to be understood that the embodiments described are some, not all embodiments of the invention. All other embodiments, which can be obtained by a person skilled in the art without any inventive work based on the described embodiments of the present invention, belong to the protection scope of the present invention.
Referring to fig. 1, the utility model provides a low-voltage seamless uninterrupted power switching device, including the multichannel low-voltage ac branch 1 for load power supply, multichannel inlet wire voltage current collection module 2, analog digital circuit 3, CPU control circuit 4, multichannel remote signaling input circuit 5, multichannel remote control output circuit 6 and alarm output circuit 7, inlet wire voltage current collection module 2 is used for collecting the voltage current signal of low-voltage ac branch 1, inlet wire voltage current collection module 2 includes voltage collection module and current collection module, voltage collection module, current collection module are connected with CPU control circuit 4 respectively, CPU control circuit 4 is used for receiving the voltage signal that voltage collection module collected and the current signal that current collection module collected, multichannel remote signaling input circuit 5, multichannel remote control output circuit 6 are connected with CPU control circuit 4 respectively, the multi-channel remote signaling input circuit 5 is used for receiving remote signaling signals, the CPU control circuit 4 outputs remote control signals to the remote control output circuit, and the CPU control circuit 4 is connected with the alarm output circuit 7 and used for outputting alarm output signals to the alarm output circuit 7.
As shown in fig. 2, the multi-channel remote control output circuit 6 is 8 remote control outputs, each remote control output includes a first resistor R11, a second resistor R21, a first capacitor C11, a first triode Q11, a first diode D11 and a relay J1, a first end of the first resistor R11 is connected to the OUT1, a second end of the first resistor R11 is connected to a base of the first triode Q11, a first end of the first capacitor C11 is connected to a first end of the second resistor R21 in series and then connected between a second end of the first resistor R11 and a base of the first triode Q11, a second end of the first capacitor C11 is connected to a second end of the second resistor R21 in series and then connected to an emitter of the first triode Q11, a collector of the first triode Q11 is connected to a coil end of the relay J1, and two ends of the first diode D11 are connected to a coil end of the relay J1 in parallel.
As shown in fig. 3, the remote signaling input circuit includes an optical isolator and a remote signaling collector, the remote signaling collector includes U4 and U5, the optical isolator includes G11-G22, and the remote signaling input determines the state of each switch, and may determine the logic state of the switch according to the remote signaling definition input.
In this embodiment, the current collection module is a current transformer disposed on the low-voltage ac branch 1, and the voltage collection module is a voltage transformer disposed on the low-voltage ac branch 1.
For example, in the two low-voltage ac branches 1, when only one of the two current transformers detects current, it indicates that no loop closing is formed, and if both current transformers detect current, it indicates that loop closing is formed, and the CPU control circuit 4 may alarm by controlling the alarm output circuit 7, thereby avoiding an accident. Wherein, the two low-voltage AC branches 1 are both AC 220V.
In this embodiment, the low-voltage seamless uninterruptible power switching device further includes a trip switch 8, where the trip switch 8 includes a plurality of sets of contacts and only one set of contacts is in a turned-on state at a time.
In the present embodiment, the relay J1 includes a coil terminal and a plurality of normally open contacts, the normally open contacts of the relay J1 are respectively connected to the input contacts of the selector switch 8, and the output contacts of the selector switch 8 are respectively connected to the opening coil of the opening circuit of the corresponding air switch.
Preferably, the relay J1 is a multi-contact alternating current intermediate relay with an electromagnetic solenoid structure, the rated voltage of the relay J1 is AC220V, the action time under the rated voltage is not more than 50 milliseconds, and the action time range of actually measuring the closing of the opening circuit is 31-33 milliseconds.
As shown in fig. 4, the analog-to-digital conversion circuit 3 includes an analog-to-digital conversion interface J1 and an AD7606 sampling chip (e.g., U8 and U9), receives the acquired analog signal through two-stage RC filtering and then connects the analog signal to 8 analog input pins of the AD7606 sampling chip, synchronously converts the analog signal of 8 channels into a digital signal with 16-bit resolution through the chip, and then transmits the digital signal to the CPU control circuit 4.
As shown in fig. 5, the CPU control circuit 4 is a stm32 series single chip microcomputer, such as U1.
As shown in fig. 6, the alarm output circuit 7 includes a first amplifier IC1 and a second amplifier IC2, an inverting terminal of the first amplifier IC1 is connected to the CPU control circuit 4 through a resistor R8, an inverting terminal of the first amplifier IC1 is connected to a seventh pin of the first amplifier IC1 through a resistor R1, a non-inverting terminal of the first amplifier IC1 is connected to ground through a second resistor R21R2 and a third resistor R3, a non-inverting terminal of the first amplifier IC1 is connected to a power supply through a resistor R9, a fourth pin of the first amplifier IC1 is connected to ground, a seventh pin of the first amplifier IC1 is connected to a sixth pin of the first amplifier IC1 through a sliding resistor RB, a sixth pin of the first amplifier IC1 is connected to a non-inverting terminal of the second amplifier IC2 through a capacitor C1 and a diode D1, a non-inverting terminal of the second amplifier IC2 is connected to ground through a third resistor R3, a non-inverting terminal of the second amplifier IC 8 is connected to ground through a resistor R4 and a diode 1, and a non-inverting terminal of the second amplifier IC 6474 is connected to ground through a resistor R6855, The fifth resistor R5 is grounded, the fourth pin of the second amplifier IC2 is grounded, the seventh pin of the second amplifier IC2 is connected with + VCC, the sixth pin of the second amplifier IC2 is connected with the base electrode of a triode VT through a sixth resistor, the emitter electrode of the triode VT is grounded, and the collector electrode of the triode VT is connected with a power supply through a buzzer B.
In this embodiment, the low-voltage seamless uninterruptible power switching device further includes a liquid crystal interface display circuit 10 and a key circuit 9, and the liquid crystal interface display circuit 10 and the key circuit 9 are respectively connected to the CPU control circuit 4.
Therefore, the utility model can acquire current and voltage in multiple paths, completely electrically isolate the high current and voltage, and detect the current and voltage condition of the line in time; the high-precision sampling chip is used for realizing the assembly and exchange of analog quantity and digital quantity; judging the state of each switch through multi-channel remote signaling input, and judging the logic state of the switch according to remote signaling definition input; through 8-channel remote control, the output state of each remote control is determined according to the analog input and remote signaling states; and the alarm can be controlled to give an alarm by monitoring the condition of the line in real time, and the abnormal condition of the line can be reflected to related workers in time.
Furthermore, the utility model discloses a low pressure closes the switching operation mode that closes a switch in the many switches that the ring will be selected after the ring is closed in the start-up, automatic jump and open and close, has not only avoided the emergence of instantaneous power failure's voltage flicker, has still guaranteed the reliability of power supply and operating personnel's personal safety.
It should be noted that the above is only the preferred embodiment of the present invention, but the design concept of the present invention is not limited thereto, and all the insubstantial modifications made by using the design concept of the present invention also fall within the protection scope of the present invention.
Claims (8)
1. A low voltage seamless uninterruptible power switching device, comprising:
the load power supply system comprises three low-voltage alternating current branches, a multi-path incoming line voltage and current acquisition module, an analog digital circuit, a CPU control circuit, a multi-path remote control input circuit, a multi-path remote control output circuit and an alarm output circuit, wherein the incoming line voltage and current acquisition module is used for acquiring voltage and current signals of the low-voltage alternating current branches, the incoming line voltage and current acquisition module comprises a voltage acquisition module and a current acquisition module, the voltage acquisition module and the current acquisition module are respectively connected with the CPU control circuit, the CPU control circuit is used for receiving the voltage signals acquired by the voltage acquisition module and the current signals acquired by the current acquisition module, the multi-path remote control input circuit and the multi-path remote control output circuit are respectively connected with the CPU control circuit, the multi-path remote control input circuit is used for receiving remote control signals, and the CPU control circuit outputs remote control signals to the remote control output circuit, the CPU control circuit is connected with the alarm output circuit and is used for outputting an alarm output signal to the alarm output circuit;
the multi-channel remote control output circuit comprises 8 remote control outputs, each remote control output comprises a first resistor, a second resistor, a first capacitor, a first triode, a first diode and a relay, the first end of the first resistor is connected with OUT1, the second end of the first resistor is connected with the base of the first triode, the first end of the first capacitor is connected with the first end of the second resistor in series and then connected between the second end of the first resistor and the base of the first triode, the second end of the first capacitor is connected with the second end of the second resistor in series and then connected with the emitter of the first triode, the collector of the first triode is connected with the coil end of the relay, and the two ends of the first diode are connected with the coil end of the relay in parallel.
2. The low-voltage seamless uninterruptible power switching device according to claim 1, wherein:
the current acquisition module is arranged on a current transformer on the low-voltage alternating current branch, and the voltage acquisition module is arranged on a voltage transformer on the low-voltage alternating current branch.
3. The low-voltage seamless uninterruptible power switching device according to claim 1, wherein:
the low-voltage seamless uninterrupted power switching device further comprises a selector switch, wherein the selector switch comprises a plurality of groups of contacts, and only one group of contacts is in a connection state each time.
4. The low-voltage seamless uninterruptible power switching device according to claim 3, wherein:
the relay comprises a coil end and a plurality of normally open contacts, the normally open contacts of the relay are respectively connected with input contacts in the contacts of the selector switch, and output contacts in the contacts of the selector switch are respectively connected with the opening coils of the opening loops of the corresponding air switches.
5. The low-voltage seamless uninterruptible power switching device according to claim 4, wherein:
the relay is a multi-contact alternating current intermediate relay with an electromagnetic solenoid structure, and the rated voltage of the alternating current intermediate relay is AC 220V.
6. The low-voltage seamless uninterruptible power switching device according to any one of claims 1 to 5, wherein:
the analog-to-digital conversion circuit comprises an AD7606 sampling chip, collected analog signals are subjected to two-stage RC filtering and then are connected to 8 paths of analog quantity input pins of the AD7606 sampling chip, 8 paths of analog signals are synchronously converted into digital quantity signals with 16-bit resolution through the chip, and then the digital quantity signals are transmitted to the CPU control circuit.
7. The low-voltage seamless uninterruptible power switching device according to any one of claims 1 to 5, wherein:
the CPU control circuit is a stm32 series single chip microcomputer.
8. The low-voltage seamless uninterruptible power switching device according to any one of claims 1 to 5, wherein:
the low-voltage seamless uninterrupted power switching device further comprises a liquid crystal interface display circuit and a key circuit, wherein the liquid crystal interface display circuit and the key circuit are respectively connected with the CPU control circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202123070819.XU CN217115719U (en) | 2021-12-08 | 2021-12-08 | Low-voltage seamless uninterrupted power switching device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202123070819.XU CN217115719U (en) | 2021-12-08 | 2021-12-08 | Low-voltage seamless uninterrupted power switching device |
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| Publication Number | Publication Date |
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| CN217115719U true CN217115719U (en) | 2022-08-02 |
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| CN202123070819.XU Active CN217115719U (en) | 2021-12-08 | 2021-12-08 | Low-voltage seamless uninterrupted power switching device |
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- 2021-12-08 CN CN202123070819.XU patent/CN217115719U/en active Active
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