CN110988579B - Power grid fault real-time monitoring system - Google Patents
Power grid fault real-time monitoring system Download PDFInfo
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- CN110988579B CN110988579B CN201911420379.0A CN201911420379A CN110988579B CN 110988579 B CN110988579 B CN 110988579B CN 201911420379 A CN201911420379 A CN 201911420379A CN 110988579 B CN110988579 B CN 110988579B
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R1/00—Details of instruments or arrangements of the types included in groups G01R5/00 - G01R13/00 and G01R31/00
- G01R1/30—Structural combination of electric measuring instruments with basic electronic circuits, e.g. with amplifier
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Abstract
The invention discloses a power grid fault real-time monitoring system, which comprises a detection circuit and a calibration transmitting circuit, wherein the detection circuit uses a detector J1 with the model number of AD 8313 to detect the signal waveform of a power grid signal transmitter, the calibration transmitting circuit uses an operational amplifier AR1, a triode Q1 and a capacitor C7 to form a noise reduction circuit to reduce the signal-to-noise ratio, simultaneously uses a diode D4 and a diode D5 to output a signal amplitude limit to an operational amplifier AR1, uses an operational amplifier AR2 and a diode D6 to form a pulse width adjusting circuit to expand the signal pulse width, simultaneously uses a triode Q3 to detect the potential difference between the input and the output of the noise reduction circuit, uses a triode Q2 to detect the abnormal output signal of the operational amplifier AR2, the operational amplifier AR3 to compare the signal, finally uses a triode Q4 and a capacitor C4 to form a level conversion circuit to convert the output signal of the operational amplifier AR3 into a high-low level signal, and triggers a signal transmitter E1 to transmit the signal to a power grid terminal controller, the fault trigger signal is a fault trigger signal of a power grid terminal controller.
Description
Technical Field
The invention relates to the technical field of circuits, in particular to a power grid fault real-time monitoring system.
Background
At present, a power grid fault real-time monitoring system bears an important role in work, and mainly transmits power grid information to a power grid signal receiver through a wireless network by a power grid signal transmitter, in practice, when the power grid signal transmitter fails in transmission, a signal received by a power grid terminal controller does not stop receiving immediately, but is delayed for a period of time, and at the moment, the information received by delaying for a period of time is easy to generate a distortion signal, so that the power grid terminal controller sends out an error analysis result.
Disclosure of Invention
In view of the above situation, in order to overcome the defects of the prior art, the present invention provides a power grid fault real-time monitoring system, which can transmit the signal waveform transmitted by a power grid signal transmitter to a power grid terminal controller in real time to trigger a fault signal of the power grid terminal controller.
The technical scheme includes that the power grid fault real-time monitoring system comprises a power grid signal transmitter, a power grid signal receiver, a controller and a signal detection module, wherein the power grid signal transmitter transmits power grid information into the power grid signal receiver through a wireless network, the power grid signal receiver receives signals and inputs the signals into a power grid terminal controller, the signal detection module detects signal waveforms transmitted by the power grid signal transmitter, the signal detection module comprises a detection circuit and a calibration transmitting circuit, the detection circuit detects the signal waveforms of the power grid signal transmitter by using a detector J1 with the model of AD 8313, an amplitude limiting circuit is formed by using a diode D1 and a diode D2 to limit the signals, the calibration transmitting circuit uses an operational amplifier AR1, a triode Q1 and a capacitor C7 to form a noise reduction circuit to reduce the signal-to-noise ratio, and simultaneously uses a diode D4 and a diode D5 to limit the output signals of the operational amplifier AR1, and a pulse width adjusting circuit consisting of an operational amplifier AR2 and a diode D6 is used for expanding the pulse width of a signal, a triode Q3 is used for detecting the potential difference of input and output signals of the noise reduction circuit, a feedback signal is fed back to the pulse width adjusting circuit to adjust the pulse width adjusting range of the output signal of the pulse width adjusting circuit, a triode Q2 is used for detecting the abnormality of the output signal of the operational amplifier AR2, the feedback signal is fed back to the inverting input end of an operational amplifier AR3, the operational amplifier AR3 compares the signals, finally, a level conversion circuit consisting of a triode Q4 and a capacitor C4 is used for converting the output signal of the operational amplifier AR3 into a high-low level signal, and a trigger signal emitter E1 sends the signal to a power grid terminal controller.
Due to the adoption of the technical scheme, compared with the prior art, the invention has the following advantages;
1, a noise reduction circuit consisting of an operational amplifier AR1, a triode Q1 and a capacitor C7 is used for reducing the signal-to-noise ratio, meanwhile, a diode D4 and a diode D5 are used for limiting the amplitude of an output signal of the operational amplifier AR1, the signal potential is prevented from being overlarge, the integrated circuit is protected, a pulse width adjusting circuit consisting of an operational amplifier AR2 and a diode D6 is used for expanding the pulse width of the signal, the higher the potential of the non-inverting input end of the operational amplifier AR2 is, the larger the pulse width of the output signal is, the larger and more stable the emission distance of a trigger signal is at the moment, and the accuracy of signal transmission is ensured;
2. the noise reduction circuit input and output signal potential difference is detected by using a triode Q3, a signal is fed back to a pulse width adjusting circuit, the pulse width adjusting range of the output signal of the pulse width adjusting circuit is adjusted, the output signal of an operational amplifier AR2 is detected by using a triode Q2, the signal is fed back to the inverting input end of the operational amplifier AR3, finally, the output signal of the operational amplifier AR3 is converted into a high-low level signal by using a level conversion circuit formed by a triode Q4 and a capacitor C4, a trigger signal transmitter E1 sends a signal to a power grid terminal controller, distortion signals can be removed in time by the power grid terminal controller, and the situation that the power grid terminal controller sends an error analysis result is prevented.
Drawings
Fig. 1 is a calibration transmitting circuit diagram of a real-time monitoring system for power grid faults.
Fig. 2 is a detection circuit diagram of a real-time monitoring system for power grid faults.
Detailed Description
The foregoing and other aspects, features and advantages of the invention will be apparent from the following more particular description of embodiments of the invention, as illustrated in the accompanying drawings in which reference is made to figures 1-2. The structural contents mentioned in the following embodiments are all referred to the attached drawings of the specification.
A real-time monitoring system for power grid faults comprises a detection circuit and a calibration transmitting circuit, wherein the detection circuit uses a detector J1 with the model number of AD 8313 to detect the signal waveform of a power grid signal transmitter, uses a diode D1 and a diode D2 to form a limiting circuit to limit the signal amplitude, the calibration transmitting circuit uses an operational amplifier AR1, a triode Q1 and a capacitor C7 to form a noise reduction circuit to reduce the signal-to-noise ratio, uses a diode D4 and a diode D5 to limit the output signal of the operational amplifier AR1, uses an operational amplifier AR2 and a diode D6 to form a pulse width adjusting circuit to enlarge the signal pulse width, uses a triode Q3 to detect the potential difference of the input signal and the output signal of the noise reduction circuit, feeds back a signal to the pulse width adjusting circuit to adjust the pulse width adjusting range of the output signal of the pulse width adjusting circuit, uses a triode Q2 to detect the abnormality of the output signal of an operational amplifier AR2, and feeds back the signal to the inverting input end of the operational amplifier AR3, the operational amplifier AR3 compares the signals, and finally, a level conversion circuit consisting of a triode Q4 and a capacitor C4 is used for converting the output signal of the operational amplifier AR3 into a high-low level signal, and a trigger signal emitter E1 sends the signal to a power grid terminal controller;
the calibration transmitting circuit uses an operational amplifier AR1, a triode Q1 and a capacitor C7 to form a noise reduction circuit to reduce the signal-to-noise ratio, uses the triode Q1 to filter a peak signal, uses a diode D4 and a diode D5 to limit the amplitude of an output signal of an operational amplifier AR1 so as to prevent the signal potential from being overlarge and play a role in protecting an integrated circuit, uses the operational amplifier AR2 and the diode D6 to form a pulse width adjusting circuit to enlarge the signal pulse width, uses a diode D6 to limit the potential of the output end of the operational amplifier AR2, when the amplitude of a signal at the inverting input end of the operational amplifier AR2 is higher than the non-inverting input end of the operational amplifier AR2, the operational amplifier AR2 outputs a position which is equivalent to removing the upper half part of the positive electrode signal waveform of the diode D6, therefore, the higher the potential of the non-inverting input end of the operational amplifier AR2, the larger the pulse width of the output signal, the larger the distance of the trigger signal at this time is more stable, and the accuracy of signal transmission is ensured, meanwhile, a triode Q3 is used for detecting the potential difference of input and output signals of the noise reduction circuit, a signal is fed back to a pulse width adjusting circuit, the pulse width adjusting range of the output signal of the pulse width adjusting circuit is adjusted, a triode Q2 is used for detecting the abnormality of the output signal of an operational amplifier AR2, the signal is fed back to the inverting input end of the operational amplifier AR3, the operational amplifier AR3 compares the signal and further adjusts the amplitude of the signal, the detection accuracy of a waveform signal is ensured, finally, a level conversion circuit consisting of a triode Q4 and a capacitor C4 is used for converting the output signal of the operational amplifier AR3 into a high-low level signal, and a trigger signal emitter E1 sends the signal to a power grid terminal controller, so that the power grid terminal controller can timely remove distortion signals;
the calibration transmitting circuit structure comprises an operational amplifier AR, a resistor R and a capacitor C, wherein the same-phase input end of the operational amplifier AR is connected with one end of the resistor R, the resistor R and the capacitor C, the reverse-phase input end of the operational amplifier AR is connected with one end of the resistor R and one end of the resistor R, the other end of the resistor R is connected with the other end of the resistor R, the output end of the operational amplifier AR is connected with the collector of a triode Q, the base of the triode Q, the anode of a diode D and the other end of the capacitor C, the base of the triode Q is connected with the other end of the resistor R, the emitter of the triode Q is connected with one end of the resistor R and one end of the resistor R, the collector of the triode Q is connected with the anode of the diode D, the cathode of the diode D, one end of the resistor R, the base of the triode Q, the collector of the triode Q is connected with the other end of the resistor R, the emitter of the triode Q is connected with one end of the resistor R and the output end of the operational amplifier AR, The negative electrode of the diode D6, one end of the resistor R7, the other end of the resistor R5 are grounded, the other end of the resistor R14 is connected with the non-inverting input end of the amplifier AR2 and one end of the resistor R10, the inverting input end of the amplifier AR2 is connected with one end of the resistor R6 and the other end of the resistor R7, and the power supply +5V, the other end of the resistor R6 is grounded, the other end of the resistor R10 is connected with the non-inverting input end of the amplifier AR3 and the positive electrode of the diode D6, the inverting input end of the amplifier AR3 is connected with the other end of the resistor R9, the output end of the amplifier AR3 is connected with the base of the triode Q3, one end of the resistor R3 and one end of the capacitor C3, the collector of the triode Q3 is connected with one end of the resistor R3, the other end of the emitter R3 is connected with the power supply +5V, and the other end of the resistor R3 is connected with the signal emitter E3.
On the basis of the scheme, the wave detection circuit adopts a wave collector J1 with the model number of AD 8313 to detect the signal wave of a power grid signal emitter, a limiting circuit consisting of a diode D1 and a diode D2 is used for limiting the amplitude of a signal, the power supply end of the wave collector J1 is connected with +5V, the grounding end of the wave collector J1 is grounded, the output end of the wave collector J1 is connected with the cathode of a diode D1 and the anode of a diode D2, the anode of a diode D1 is connected with the cathode of a diode D2, the cathode of a voltage regulator tube D3 and the other end of a resistor R1, and the anode of the voltage regulator tube D3 is grounded.
When the system is used specifically, the system comprises a power grid signal transmitter, a power grid signal receiver, a controller and a signal detection module, wherein the power grid signal transmitter transmits power grid information into the power grid signal receiver through a wireless network, the power grid signal receiver receives signals and inputs the signals into a power grid terminal controller, the signal detection module detects signal waveforms transmitted by the power grid signal transmitter, the signal detection module comprises a detection circuit and a calibration transmitting circuit, the detection circuit detects the signal waveforms of the power grid signal transmitter by using a wave detector J1 with the model of AD 8313, a limiting circuit consisting of a diode D1 and a diode D2 is used for limiting the signals, the calibration transmitting circuit reduces the signal-to-noise ratio by using an operational amplifier AR1, a triode Q1 and a capacitor C7, the triode Q1 is used for filtering peak signals, and meanwhile, the diode D4 and the diode D4 are used for reducing the signal-to-noise ratio, The diode D5 limits the amplitude of the output signal of the operational amplifier AR1, prevents the signal potential from being too large, and plays a role in protecting an integrated circuit, the operational amplifier AR2 and the diode D6 are used to form a pulse width adjusting circuit to expand the signal pulse width, the diode D6 is used to limit the potential of the output end of the operational amplifier AR2, when the amplitude of the signal at the inverting input end of the operational amplifier AR2 is higher than the non-inverting input end of the operational amplifier AR2, the operational amplifier AR2 outputs a position which is equivalent to removing the upper half part of the positive electrode signal waveform of the diode D6, therefore, the higher the potential of the non-inverting input end of the operational amplifier AR2 is, the larger and more stable the transmission distance of the trigger signal is, the accuracy of the signal transmission is ensured, meanwhile, the triode Q3 is used to detect the potential difference between the input signal and the output signal of the noise reduction circuit, feed back the signal to the pulse width adjusting circuit to adjust the pulse width adjusting range of the output signal of the pulse width adjusting circuit, the triode Q2 detects that the output signal of the operational amplifier AR2 is abnormal, and the feedback signal is sent to the inverting input end of the operational amplifier AR3, the operational amplifier AR3 compares the signals, further adjusts the signal amplitude, the detection accuracy of the waveform signal is ensured, finally, the triode Q4 and the capacitor C4 are used for forming a level conversion circuit to convert the output signal of the operational amplifier AR3 into a high-low level signal, and the trigger signal transmitter E1 sends a signal to the power grid terminal controller, so that the power grid terminal controller can remove distortion signals in time.
While the invention has been described in further detail with reference to specific embodiments thereof, it is not intended that the invention be limited to the specific embodiments thereof; for those skilled in the art to which the present invention pertains and related technologies, the extension, operation method and data replacement should fall within the protection scope of the present invention based on the technical solution of the present invention.
Claims (2)
1. A power grid fault real-time monitoring system comprises a power grid signal transmitter, a power grid signal receiver, a controller and a signal detection module, wherein the power grid signal transmitter transmits power grid information into the power grid signal receiver through a wireless network, the power grid signal receiver receives signals and inputs the signals into a power grid terminal controller, and the signal detection module detects signal waveforms transmitted by the power grid signal transmitter, and is characterized in that the signal detection module comprises a detection circuit and a calibration transmitting circuit, the detection circuit detects the signal waveforms of the power grid signal transmitter by using a wave detector J1 with the model of AD 8313, a limiting circuit consisting of a diode D1 and a diode D2 is used for limiting the signals, the calibration transmitting circuit uses an operational amplifier AR1, a triode Q1 and a capacitor C7 to form a noise reduction circuit for reducing the signal noise ratio, and simultaneously, the diode D4 and the diode D5 are used for outputting signals to the operational amplifier AR1, the operational amplifier AR2 and the diode D6 are used for forming a pulse width adjusting circuit to expand the pulse width of a signal, meanwhile, the triode Q3 is used for detecting the potential difference of input and output signals of the noise reduction circuit, a feedback signal is fed back to the pulse width adjusting circuit to adjust the pulse width adjusting range of the output signal of the pulse width adjusting circuit, the triode Q2 is used for detecting the abnormality of the output signal of the operational amplifier AR2, the feedback signal is fed back to the inverting input end of the operational amplifier AR3, the operational amplifier AR3 compares the signals, finally, the triode Q4 and the capacitor C4 are used for forming a level switching circuit to convert the output signal of the operational amplifier AR3 into high and low level signals, and the trigger signal emitter E1 is used for sending the signals to the power grid terminal controller;
the calibration transmitting circuit comprises an operational amplifier AR1, wherein the non-inverting input end of the operational amplifier AR1 is connected with one end of a resistor R1, a resistor R4 and a capacitor C4, the inverting input end of the operational amplifier AR 4 is connected with one end of the resistor R4 and one end of the resistor R4, the other end of the resistor R4 is connected with the other end of the resistor R4, the output end of the operational amplifier AR 4 is connected with the collector of a transistor Q4, the base of the transistor Q4 and the anode of a diode D4, the cathode of the diode D4 and the other end of the capacitor C4 are connected with the ground, the base of the transistor Q4 is connected with the anode of the diode D4, the cathode of the diode D4 and one end of the resistor R4, the base of the transistor Q4 and the collector of the transistor Q4 are connected with the collector of the transistor R4. The emitter of the triode Q3 is connected with one end of a resistor R5, the output end of an operational amplifier AR2, the cathode of a diode D6 and one end of a resistor R7, the other end of the resistor R5 is grounded, the other end of the resistor R14 is connected with the non-inverting input end of the operational amplifier AR2 and one end of the resistor R10, the inverting input end of the operational amplifier AR2 is connected with one end of the resistor R6 and the other end of the resistor R7, the power supply is +5V, the other end of the resistor R6 is grounded, the other end of the resistor R10 is connected with the non-inverting input end of the amplifier AR3 and the anode of the diode D6, the inverting input end of the amplifier AR3 is connected with the other end of the resistor R9, the output end of the amplifier AR3 is connected with the base of the triode Q4, one end of the resistor R11 and one end of the capacitor C4, the collector of the triode Q4 is connected with one end of the resistor R13, the other ends of the resistor R13 and the capacitor C4 are grounded, the emitter of the triode Q4 is connected with one end of the resistor R12, the other end of the resistor R11 and the power supply is +5V, and the other end of the resistor R12 is connected with the signal emitter E1.
2. The system for monitoring the power grid faults in real time as claimed in claim 1, wherein the detection circuit comprises a waveform collector J1 with the model number of AD 8313, the power supply end of the waveform collector J1 is connected with +5V, the grounding end of the waveform collector J1 is grounded, the output end of the waveform collector J1 is connected with the cathode of a diode D1 and the anode of a diode D2, the anode of a diode D1 is connected with the cathode of a diode D2, the cathode of a voltage regulator tube D3 and the other end of a resistor R1, and the anode of the voltage regulator tube D3 is grounded.
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| CN201911420379.0A CN110988579B (en) | 2019-12-31 | 2019-12-31 | Power grid fault real-time monitoring system |
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| CN201911420379.0A CN110988579B (en) | 2019-12-31 | 2019-12-31 | Power grid fault real-time monitoring system |
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| CN111464174A (en) * | 2020-04-16 | 2020-07-28 | 蔡波 | Sewage treatment monitoring system |
| CN111458600A (en) * | 2020-05-06 | 2020-07-28 | 白有华 | 5G communication cable fault detection system |
| CN111537851B (en) * | 2020-05-22 | 2020-12-08 | 国网江苏省电力有限公司苏州供电分公司 | Cable monitoring system based on Internet of things |
| CN112331044B (en) * | 2020-11-14 | 2021-07-13 | 廊坊师范学院 | Photovoltaic power generation system for teaching |
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| CN207817110U (en) * | 2017-12-30 | 2018-09-04 | 南京华博供用电工程有限公司 | Feeder line fault detection control apparatus |
| CN109561299B (en) * | 2018-11-27 | 2020-05-01 | 河南亿秒电子科技有限公司 | Intelligent fault analysis equipment for monitoring camera |
| CN209570865U (en) * | 2019-04-02 | 2019-11-01 | 深圳市乐瑞达科技有限公司 | A kind of supply voltage driving adjusting circuit |
| CN110176851A (en) * | 2019-05-14 | 2019-08-27 | 郑州工业应用技术学院 | A kind of electric power regulation device |
| CN110412427A (en) * | 2019-08-21 | 2019-11-05 | 成都信息工程大学 | A kind of low-voltage power fault detection positioning system and fault detection method |
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