CN212009326U - Power station machine room power supply monitoring and early warning system - Google Patents
Power station machine room power supply monitoring and early warning system Download PDFInfo
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- CN212009326U CN212009326U CN202020397714.1U CN202020397714U CN212009326U CN 212009326 U CN212009326 U CN 212009326U CN 202020397714 U CN202020397714 U CN 202020397714U CN 212009326 U CN212009326 U CN 212009326U
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Abstract
The utility model provides a power station machine room power supply monitoring and early warning system, which comprises a current detection unit, a power supply unit, a processing chip U1, a storage battery BAT, a voltage conversion circuit and a battery switching unit; the current detection unit is used for detecting the current of a power supply live wire L of a power station machine room and outputting a control signal to the switch control circuit and the processing chip when the current is increased, the positive input end and the negative input end of the rectifying circuit Z2 are respectively connected to the power supply live wire L and the power supply zero line N, the positive output end of the rectifying circuit is connected with the input end of the switch control circuit, the negative output end of the rectifying circuit is grounded, the second output end of the switch control circuit is connected with the input end of the voltage conversion circuit, the voltage conversion circuit supplies power to the processing chip, and the processing chip is connected with the host; through above-mentioned structure, can monitor the voltage and the electric current of the power supply live wire of power station computer lab.
Description
Technical Field
The utility model relates to a power station power supply monitoring system especially relates to a power station computer lab power supply monitoring early warning system.
Background
The power station computer lab is the necessary equipment in electric power places such as transformer substation, be provided with various communication equipment in the power station computer lab, a monitoring information for inciting somebody to action places such as transformer substation collects, storage and upload, power station computer lab equipment generally adopts the 220V power supply in the course of the work, in the power supply process in the power station computer lab, because the state of various equipment differs, therefore, in case trouble such as short circuit appears in certain equipment when these equipment during operation, can make the current increase on the power supply live wire, thereby cause the impact to other consumer, in the prior art, there is not an effectual means to monitor and the early warning to the power supply state of power station computer lab yet.
Therefore, a new technical solution is needed to solve the above technical problems.
SUMMERY OF THE UTILITY MODEL
In view of this, the utility model provides a pair of power station computer lab power supply monitoring and early warning system can monitor the voltage and the electric current of the power supply live wire of power station computer lab to in time export corresponding detected signal when electric current overflows and voltage excessive pressure, thereby can in time early warning, entire system job stabilization moreover.
The utility model provides a power station machine room power supply monitoring and early warning system, which comprises a current detection unit, a power supply unit, a processing chip U1, a storage battery BAT, a voltage conversion circuit and a battery switching unit;
the power supply unit comprises a rectifying circuit Z2 and a switch control circuit;
the current detection unit is used for detecting the current of a power supply live wire L of a power station machine room and outputting a control signal to the switch control circuit and the processing chip when the current is increased, the positive input end and the negative input end of the rectifying circuit Z2 are respectively connected to the power supply live wire L and the power supply zero line N, the positive output end of the rectifying circuit is connected with the input end of the switch control circuit, the negative output end of the rectifying circuit is grounded, the second output end of the switch control circuit is connected with the input end of the voltage conversion circuit, the voltage conversion circuit supplies power to the processing chip, and the processing chip is connected with the host;
the positive pole of the storage battery BAT is connected with the input end of the battery switching unit, the output end of the battery switching unit is connected with the input end of the voltage conversion circuit, the control output end of the battery switching unit is connected with the input end of the processing chip, the control end of the battery switching unit is connected with the first output end of the switch control circuit, and the control input unit of the switch control circuit is connected with the output end of the current detection unit.
Further, the current detection unit comprises a current transformer T1, a rectifying circuit Z1, a resistor R1, a resistor R2, a resistor R3, a resistor R4, a matching resistor RL, a resistor R14, a resistor R15, a triode Q4, a triode Q5, an inductor L1, a capacitor C3 and a voltage regulator DW 3;
the primary winding of the current transformer T1 is connected in series with a power supply live wire L, the positive end of the secondary winding of the current transformer T1 is connected with the certificate input end of a rectifying circuit Z1, the negative input end of the rectifying circuit Z1 and the negative output end of the secondary winding of the current transformer T1 are grounded, one end of a resistor R1 is connected with the positive output end of a rectifying circuit Z1, the negative output end of the rectifying circuit is grounded, the other end of the resistor R1 is connected with one end of an inductor L1, and the other end of the inductor L1 is grounded through a matched load RL;
the common connection point of an inductor L1 and a resistor R1 is connected with an emitter of a triode Q4 through a resistor R2, a collector of a triode Q4 is grounded through a resistor R15, a collector of a triode Q4 is grounded through a capacitor C3, a collector of a triode Q4 is connected with a cathode of a voltage regulator DW3, an anode of a voltage regulator DW3 is grounded, a collector of a triode Q4 is connected with one end of a resistor R14, the other end of the resistor R14 serves as an output end of a current detection unit, a base of a triode Q4 is connected with a collector of a triode Q5, a base of the triode Q5 is connected with the common connection point between the inductor L1 and a matching load RL through a resistor R4, and an emitter of a triode Q5 is connected with the common connection point between the inductor L1 and the matching load.
Further, the switch control circuit comprises a resistor R6, a resistor R7, a resistor R8, a resistor R9, a resistor R10, a resistor R11, a resistor R12, a resistor R13, a resistor R16, a capacitor C1, a capacitor C2, a voltage regulator DW1, a voltage regulator DW2, a triode Q2, a triode Q3, a PMOS tube M1 and a diode D1;
one end of a resistor R is connected with the positive output end of the rectifying circuit Z, the other end of the resistor R is connected with the source electrode of a PMOS tube M through the resistor R, the common connection point between the resistor R and the resistor R is grounded through a capacitor C, the common connection point between the resistor R and the resistor R is grounded after being connected in series through the resistor R and the resistor R, the common connection point between the resistor R and the resistor R is connected with the negative electrode of a voltage stabilizing tube DW, the positive electrode of the voltage stabilizing tube DW is connected with the base electrode of a triode Q through the resistor R, the emitting electrode of the triode Q is grounded, the collector electrode of the triode Q is connected with the base electrode of the triode Q, the base electrode of the triode Q is connected with the source electrode of the PMOS tube M through the resistor R, the source electrode of the PMOS tube M is connected with the grid electrode of the PMOS tube M through the resistor R, the grid electrode of the PMOS tube M is connected with the collector, the negative electrode of the diode D1 is used as the second output end of the switch control circuit, the positive electrode of the diode D1 is used as the first output end of the switch control circuit, the drain electrode of the PMOS tube M1 is grounded through a capacitor C2, the drain electrode of the PMOS tube M1 is connected with the negative electrode of a voltage-stabilizing tube DW2, and the positive electrode of the voltage-stabilizing tube DW2 is grounded; the base of transistor Q2 serves as the control input of the switch control circuit.
Further, the battery switching unit comprises a resistor R17, a resistor R18, a resistor R19, a resistor R5, a triode Q1 and a diode D2;
one end of a resistor R17 is used as a control input end of the battery switching unit, the other end of the resistor R17 is connected with a base of a triode Q1, an emitter of a triode Q1 is connected with one end of a resistor R5, the other end of a resistor R5 is used as an input end of the battery switching unit, a collector of a triode Q1 is connected with an anode of a diode D2 through a resistor R8, a cathode of a diode D2 is used as an output end of the battery switching unit, a collector of a triode Q1 is connected with one end of a resistor R19, and the other end of a resistor R19 is used as a control output end of the battery switching unit, wherein a triode Q1 is a P-.
Further, the voltage conversion circuit is an LM7805 chip.
Further, the processing chip is an AT89C2051 chip.
Further, the storage battery is a lithium battery.
The utility model has the advantages that: through the utility model discloses, can monitor the voltage and the electric current of the power supply live wire of power station computer lab to in time export corresponding detected signal when the electric current overflows and voltage is excessive pressure, thereby can in time early warning, entire system job stabilization moreover.
Drawings
The invention will be further described with reference to the following figures and examples:
fig. 1 is a schematic block diagram of the present invention.
Fig. 2 is a schematic circuit diagram of the present invention.
Detailed Description
The invention is described in further detail below with reference to the drawings in the specification:
the utility model provides a power station machine room power supply monitoring and early warning system, which comprises a current detection unit, a power supply unit, a processing chip U1, a storage battery BAT, a voltage conversion circuit and a battery switching unit;
the power supply unit comprises a rectifying circuit Z2 and a switch control circuit;
the current detection unit is used for detecting the current of a power supply live wire L of a power station machine room and outputting a control signal to the switch control circuit and the processing chip when the current is increased, the positive input end and the negative input end of the rectifying circuit Z2 are respectively connected to the power supply live wire L and the power supply zero line N, the positive output end of the rectifying circuit is connected with the input end of the switch control circuit, the negative output end of the rectifying circuit is grounded, the second output end of the switch control circuit is connected with the input end of the voltage conversion circuit, the voltage conversion circuit supplies power to the processing chip, and the processing chip is connected with the host; the processing chip and the upper host CAN be in communication connection through the existing wireless communication module, such as a 4G communication module, a Bluetooth module and the like, and CAN also be connected through a CAN bus; the voltage conversion circuit is an LM7805 chip, the processing chip is an AT89C2051 chip, and the storage battery is a lithium battery.
The positive electrode of the storage battery BAT is connected with the input end of the battery switching unit, the output end of the battery switching unit is connected with the input end of the voltage conversion circuit, the control output end of the battery switching unit is connected with the input end of the processing chip, the control end of the battery switching unit is connected with the first output end of the switch control circuit, and the control input unit of the switch control circuit is connected with the output end of the current detection unit; through the structure, the voltage and the current of the power supply live wire of the power station machine room can be monitored, and corresponding detection signals are timely output when the current is over-current and the voltage is over-voltage, so that early warning can be timely achieved, and the whole system is stable in work.
In this embodiment, the current detection unit includes a current transformer T1, a rectifier circuit Z1, a resistor R1, a resistor R2, a resistor R3, a resistor R4, a matching resistor RL, a resistor R14, a resistor R15, a triode Q4, a triode Q5, an inductor L1, a capacitor C3, and a voltage regulator DW 3;
the primary winding of the current transformer T1 is connected in series with a power supply live wire L, the positive end of the secondary winding of the current transformer T1 is connected with the certificate input end of a rectifying circuit Z1, the negative input end of the rectifying circuit Z1 and the negative output end of the secondary winding of the current transformer T1 are grounded, one end of a resistor R1 is connected with the positive output end of a rectifying circuit Z1, the negative output end of the rectifying circuit is grounded, the other end of the resistor R1 is connected with one end of an inductor L1, and the other end of the inductor L1 is grounded through a matched load RL;
the common connection point of an inductor L1 and a resistor R1 is connected with the emitter of a triode Q4 through a resistor R2, the collector of a triode Q4 is grounded through a resistor R15, the collector of a triode Q4 is grounded through a capacitor C3, the collector of a triode Q4 is connected with the cathode of a voltage regulator DW3, the anode of a voltage regulator DW3 is grounded, the collector of a triode Q4 is connected with one end of a resistor R14, the other end of a resistor R14 serves as the output end of the current detection unit, the base of a triode Q4 is connected with the collector of a triode Q5, the base of the triode Q5 is connected with the common connection point between the inductor L5 and a matched load RL through a resistor R5, the emitter of the triode Q5 is connected with the common connection point between the inductor L5 and the matched load RL through a resistor R5, wherein the transistors Q5 and the triode Q5 are both P-type triodes, the resistor R5 and the resistor R5 are equal in resistance or, in general, the resistors R2 are all larger than the resistor R3, the resistance difference between the resistor R2 and the resistor R3 can be adjusted according to actual needs, the resistance is also a current fluctuation amplitude adjustment point, the resistance of the resistor R3 is smaller than the resistance of the resistor R4, wherein, the current transformer T1 is used for collecting the current of the live line L, after being rectified by the rectifying circuit Z1, a loop is formed by the resistor R1, the inductor L1 and the matching load RL, the inductor L1 is equivalent to a conducting wire for a stable direct current, therefore, both ends of the inductor L1 do not have an induced electromotive voltage, at this time, the transistor Q5 is turned on, the transistor Q4 is turned off, after the current suddenly increases, a high voltage is induced at the left end of the inductor L1, the left end voltage of the inductor L1 is larger than the right end voltage, at this time, the emitter voltage of the transistor Q4 is larger than the base voltage, the transistor Q4 is turned on, form a detected signal, this detected signal is carried to processing chip on the one hand, is uploaded to upper host computer by processing chip, and upper host computer reports an emergency and asks for help or increased vigilance through modes such as alarm, display, etc. and tells the staff to overhaul the investigation, and this detected signal on the other hand transmits to on-off control circuit for cut off online power supply, the battery supplies power again.
In this embodiment, the switch control circuit includes a resistor R6, a resistor R7, a resistor R8, a resistor R9, a resistor R10, a resistor R11, a resistor R12, a resistor R13, a resistor R16, a capacitor C1, a capacitor C2, a voltage regulator DW1, a voltage regulator DW2, a transistor Q2, a transistor Q3, a PMOS transistor M1, and a diode D1;
one end of a resistor R is connected with the positive output end of the rectifying circuit Z, the other end of the resistor R is connected with the source electrode of a PMOS tube M through the resistor R, the common connection point between the resistor R and the resistor R is grounded through a capacitor C, the common connection point between the resistor R and the resistor R is grounded after being connected in series through the resistor R and the resistor R, the common connection point between the resistor R and the resistor R is connected with the negative electrode of a voltage stabilizing tube DW, the positive electrode of the voltage stabilizing tube DW is connected with the base electrode of a triode Q through the resistor R, the emitting electrode of the triode Q is grounded, the collector electrode of the triode Q is connected with the base electrode of the triode Q, the base electrode of the triode Q is connected with the source electrode of the PMOS tube M through the resistor R, the source electrode of the PMOS tube M is connected with the grid electrode of the PMOS tube M through the resistor R, the grid electrode of the PMOS tube M is connected with the collector, the negative electrode of the diode D1 is used as the second output end of the switch control circuit, the positive electrode of the diode D1 is used as the first output end of the switch control circuit, the drain electrode of the PMOS tube M1 is grounded through a capacitor C2, the drain electrode of the PMOS tube M1 is connected with the negative electrode of a voltage-stabilizing tube DW2, and the positive electrode of the voltage-stabilizing tube DW2 is grounded; the base electrode of the triode Q2 is used as the control input end of the switch control circuit; with the structure, the PMOS transistor M1 is a switch transistor, which is conducted by the conduction of the transistor Q3, when the power is just powered on, the direct current output by the rectifying circuit is filtered by the capacitor, the triode Q3 is conducted through the resistors R6, R7 and R11, the grid voltage of the PMOS transistor M1 is pulled low due to the conduction of Q3, the source voltage is larger than the grid voltage and is conducted, thereby supplying power to the subsequent circuit, when the voltage fluctuates and exceeds the safe voltage, the voltage regulator DW1 is conducted, thereby leading the triode Q2 to be conducted, further controlling the transistor Q3 to be cut off, and the PMOS tube M1 to be cut off accordingly, thereby playing the role of overvoltage protection, when the voltage returns to normal, the voltage regulator DW1 is cut off again, the triode Q2 is also cut off, the triode Q3 is conducted, the PMOS tube is further conducted for power supply, when the current detection circuit outputs a detection signal, the transistor Q2 is also turned on, so that the PMOS transistor is turned off to form a protection mechanism.
In this embodiment, the battery switching unit includes a resistor R17, a resistor R18, a resistor R19, a resistor R5, a transistor Q1, and a diode D2;
one end of a resistor R17 is used as a control input end of the battery switching unit, the other end of the resistor R17 is connected with a base electrode of a triode Q1, an emitting electrode of a triode Q1 is connected with one end of a resistor R5, the other end of a resistor R5 is used as an input end of the battery switching unit, a collector electrode of a triode Q1 is connected with an anode of a diode D2 through a resistor R8, a cathode of a diode D2 is used as an output end of the battery switching unit, a collector electrode of a triode Q1 is connected with one end of a resistor R19, and the other end of a resistor R19 is used as a control output end of the battery switching unit, wherein the triode Q1 is a P-type triode, when a current detection circuit and a voltage regulator DW1 are both normal, the triode Q1 is higher than the voltage of the emitting electrode, the triode Q1 is cut off, and when the PMOS tube is cut off, the triode Q1, the processing chip U1 judges whether overcurrent or overvoltage is output according to the output signal of the resistor R19 and the output signal of the resistor R14, when the resistor R14 has no output, but the resistor R19 has output, at the moment, the power supply overvoltage of the machine room is judged, when the resistor R14 and the resistor R19 both have output, the overcurrent is judged, although the overcurrent and the overvoltage occur simultaneously, at the moment, the overcurrent state is also concluded, and the processing chip uploads alarm information (including the number or the detection position of the machine room, the alarm content (overcurrent or overvoltage), and the like) to the upper host.
Finally, although the present invention has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that the present invention can be modified or replaced by other means without departing from the spirit and scope of the present invention, which should be construed as limited only by the appended claims.
Claims (7)
1. The utility model provides a power station computer lab power supply monitoring early warning system which characterized in that: the device comprises a current detection unit, a power supply unit, a processing chip U1, a storage battery BAT, a voltage conversion circuit and a battery switching unit;
the power supply unit comprises a rectifying circuit Z2 and a switch control circuit;
the current detection unit is used for detecting the current of a power supply live wire L of a power station machine room and outputting a control signal to the switch control circuit and the processing chip when the current is increased, the positive input end and the negative input end of the rectifying circuit Z2 are respectively connected to the power supply live wire L and the power supply zero line N, the positive output end of the rectifying circuit is connected with the input end of the switch control circuit, the negative output end of the rectifying circuit is grounded, the second output end of the switch control circuit is connected with the input end of the voltage conversion circuit, the voltage conversion circuit supplies power to the processing chip, and the processing chip is connected with an upper host;
the positive pole of the storage battery BAT is connected with the input end of the battery switching unit, the output end of the battery switching unit is connected with the input end of the voltage conversion circuit, the control output end of the battery switching unit is connected with the input end of the processing chip, the control end of the battery switching unit is connected with the first output end of the switch control circuit, and the control input unit of the switch control circuit is connected with the output end of the current detection unit.
2. The power station room power supply monitoring and early warning system of claim 1, characterized in that: the current detection unit comprises a current transformer T1, a rectifying circuit Z1, a resistor R1, a resistor R2, a resistor R3, a resistor R4, a matching resistor RL, a resistor R14, a resistor R15, a triode Q4, a triode Q5, an inductor L1, a capacitor C3 and a voltage regulator DW 3;
the primary winding of the current transformer T1 is connected in series with a power supply live wire L, the positive end of the secondary winding of the current transformer T1 is connected with the certificate input end of a rectifying circuit Z1, the negative input end of the rectifying circuit Z1 and the negative output end of the secondary winding of the current transformer T1 are grounded, one end of a resistor R1 is connected with the positive output end of a rectifying circuit Z1, the negative output end of the rectifying circuit is grounded, the other end of the resistor R1 is connected with one end of an inductor L1, and the other end of the inductor L1 is grounded through a matched load RL;
the common connection point of an inductor L1 and a resistor R1 is connected with an emitter of a triode Q4 through a resistor R2, a collector of a triode Q4 is grounded through a resistor R15, a collector of a triode Q4 is grounded through a capacitor C3, a collector of a triode Q4 is connected with a cathode of a voltage regulator DW3, an anode of a voltage regulator DW3 is grounded, a collector of a triode Q4 is connected with one end of a resistor R14, the other end of the resistor R14 serves as an output end of a current detection unit, a base of a triode Q4 is connected with a collector of a triode Q5, a base of the triode Q5 is connected with the common connection point between the inductor L1 and a matching load RL through a resistor R4, and an emitter of a triode Q5 is connected with the common connection point between the inductor L1 and the matching load.
3. The power station room power supply monitoring and early warning system of claim 1, characterized in that: the switch control circuit comprises a resistor R6, a resistor R7, a resistor R8, a resistor R9, a resistor R10, a resistor R11, a resistor R12, a resistor R13, a resistor R16, a capacitor C1, a capacitor C2, a voltage-regulator tube DW1, a voltage-regulator tube DW2, a triode Q2, a triode Q3, a PMOS tube M1 and a diode D1;
one end of a resistor R is connected with the positive output end of the rectifying circuit Z, the other end of the resistor R is connected with the source electrode of a PMOS tube M through the resistor R, the common connection point between the resistor R and the resistor R is grounded through a capacitor C, the common connection point between the resistor R and the resistor R is grounded after being connected in series through the resistor R and the resistor R, the common connection point between the resistor R and the resistor R is connected with the negative electrode of a voltage stabilizing tube DW, the positive electrode of the voltage stabilizing tube DW is connected with the base electrode of a triode Q through the resistor R, the emitting electrode of the triode Q is grounded, the collector electrode of the triode Q is connected with the base electrode of the triode Q, the base electrode of the triode Q is connected with the source electrode of the PMOS tube M through the resistor R, the source electrode of the PMOS tube M is connected with the grid electrode of the PMOS tube M through the resistor R, the grid electrode of the PMOS tube M is connected with the collector, the negative electrode of the diode D1 is used as the second output end of the switch control circuit, the positive electrode of the diode D1 is used as the first output end of the switch control circuit, the drain electrode of the PMOS tube M1 is grounded through a capacitor C2, the drain electrode of the PMOS tube M1 is connected with the negative electrode of a voltage-stabilizing tube DW2, and the positive electrode of the voltage-stabilizing tube DW2 is grounded; the base of transistor Q2 serves as the control input of the switch control circuit.
4. The power station room power supply monitoring and early warning system of claim 1, characterized in that: the battery switching unit comprises a resistor R17, a resistor R18, a resistor R19, a resistor R5, a triode Q1 and a diode D2;
one end of a resistor R17 is used as a control input end of the battery switching unit, the other end of the resistor R17 is connected with a base of a triode Q1, an emitter of a triode Q1 is connected with one end of a resistor R5, the other end of a resistor R5 is used as an input end of the battery switching unit, a collector of a triode Q1 is connected with an anode of a diode D2 through a resistor R8, a cathode of a diode D2 is used as an output end of the battery switching unit, a collector of a triode Q1 is connected with one end of a resistor R19, and the other end of a resistor R19 is used as a control output end of the battery switching unit, wherein a triode Q1 is a P-.
5. The power station room power supply monitoring and early warning system of claim 1, characterized in that: the voltage conversion circuit is an LM7805 chip.
6. The power station room power supply monitoring and early warning system of claim 1, characterized in that: the processing chip is an AT89C2051 chip.
7. The power station room power supply monitoring and early warning system of claim 1, characterized in that: the storage battery is a lithium battery.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN202020397714.1U CN212009326U (en) | 2020-03-25 | 2020-03-25 | Power station machine room power supply monitoring and early warning system |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202020397714.1U CN212009326U (en) | 2020-03-25 | 2020-03-25 | Power station machine room power supply monitoring and early warning system |
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| CN212009326U true CN212009326U (en) | 2020-11-24 |
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| CN202020397714.1U Active CN212009326U (en) | 2020-03-25 | 2020-03-25 | Power station machine room power supply monitoring and early warning system |
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