CN218782683U - Transformer substation electronic fence fault detection system - Google Patents

Transformer substation electronic fence fault detection system Download PDF

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Publication number
CN218782683U
CN218782683U CN202222819730.7U CN202222819730U CN218782683U CN 218782683 U CN218782683 U CN 218782683U CN 202222819730 U CN202222819730 U CN 202222819730U CN 218782683 U CN218782683 U CN 218782683U
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voltage
transistor
electronic fence
electrically connected
resistor
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杨杰
李宇宽
黄家灿
陈志祥
芶高艳
农忠明
李泓羲
梁丽
李庆国
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Wenshan Power Supply Branch of Yunnan Power Grid Co Ltd
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Wenshan Power Supply Branch of Yunnan Power Grid Co Ltd
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    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y04—INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
    • Y04S—SYSTEMS INTEGRATING TECHNOLOGIES RELATED TO POWER NETWORK OPERATION, COMMUNICATION OR INFORMATION TECHNOLOGIES FOR IMPROVING THE ELECTRICAL POWER GENERATION, TRANSMISSION, DISTRIBUTION, MANAGEMENT OR USAGE, i.e. SMART GRIDS
    • Y04S10/00—Systems supporting electrical power generation, transmission or distribution
    • Y04S10/50—Systems or methods supporting the power network operation or management, involving a certain degree of interaction with the load-side end user applications
    • Y04S10/52—Outage or fault management, e.g. fault detection or location

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Abstract

The application provides a substation electronic fence fault detection system which comprises a mutual inductor, a voltage measurement circuit, a voltage comparator, a power amplifier and an acousto-optic alarm which are sequentially and electrically connected; the input end of the mutual inductor is connected to a transformer substation electronic fence line and used for acquiring a pulse current signal on the transformer substation electronic fence line and outputting the pulse current signal to the voltage measuring circuit; the voltage measurement circuit transmits a pulsed voltage signal to a voltage comparator; the voltage comparator compares the pulse voltage signal with a preset striking voltage value, and outputs a corresponding electric signal to the power amplifier when the pulse voltage signal is lower than the preset striking voltage value; and the power amplifier amplifies the electric signal and transmits the amplified electric signal to the audible and visual alarm to give an alarm. This application inserts a detecting system in the fence circuit, realizes the fault detection on the fence circuit of transformer substation, can not cause operation maintenance staff maloperation, and the security is better.

Description

Transformer substation electronic fence fault detection system
Technical Field
The application belongs to the technical field of electric power testing, and particularly relates to a substation electronic fence fault detection system.
Background
The current transformer substation safety protection mainly depends on the fence of transformer substation on install, and fence accessible host computer provides voltage on the fence wire, sends out the police dispatch newspaper when having the invasion of unusual life body. At present, most transformer substations gradually start to install novel pulse type electronic fence, can produce higher pulse voltage on the fence wire, all can receive the striking of pulse electricity when someone touches any fence wire. An alarm will be generated when an intruder attempts to cut the fence and force entry.
And the substation operation maintenance personnel need to regularly detect the electronic fence to ensure the stable operation of the electronic fence, so that the pulse voltage of the electronic fence needs to be measured and detected. The pulse voltage of the electronic fence is measured and detected by a lap joint method.
The traditional overlap joint method is to use an insulator spindle to connect two wire short circuits of fence, and the system is reported to the police and then is explained the system normally, consequently, invades or carries out the overlap joint to fence when unusual life body, all can make the fence system send the warning, causes the maloperation easily.
SUMMERY OF THE UTILITY MODEL
The embodiment of the application provides a transformer substation electronic fence fault detection system, which can send out an alarm when a voltage value in an electronic fence system is lower than a striking voltage value, so that fault detection on a transformer substation electronic fence line is realized.
The embodiment provides a substation electronic fence fault detection system, which comprises a mutual inductor, a voltage measurement circuit, a voltage comparator, a power amplifier and an acousto-optic alarm which are electrically connected in sequence;
the input end of the mutual inductor is connected to a transformer substation electronic fence circuit and used for acquiring a pulse current signal on the transformer substation electronic fence circuit and outputting the pulse current signal to the voltage measuring circuit;
the voltage measuring circuit generates a pulse voltage signal after receiving the pulse current signal and transmits the pulse voltage signal to the voltage comparator;
the voltage comparator is used for comparing the pulse voltage signal with a preset striking voltage value of the pulse voltage signal, and when the pulse voltage signal is lower than the preset striking voltage value, the voltage comparator outputs a corresponding electric signal to the power amplifier;
the power amplifier is used for amplifying the electric signal and transmitting the electric signal to the audible and visual alarm, and the audible and visual alarm gives an alarm.
In one possible implementation, the voltage measurement circuit includes a first resistor (R1), a second resistor (R2), a third resistor (R3), a fourth resistor (R4), a first transistor (VT 1), a second transistor (VT 2), a third transistor (VT 3), a first diode (VD 1), a second diode (VD 2), a first detection capacitor (C1), a second detection capacitor (C2), and a filter capacitor (C0), where:
one end of the first resistor (R1) is electrically connected with a first output end of the mutual inductor and one end of the filter capacitor (C0);
the other end of the first resistor (R1) is electrically connected with a second output end of the mutual inductor, one end of the second resistor (R2), one end of the first detection capacitor (C1), one end of the third resistor (R3), one end of the second detection capacitor (C2), one end of the fourth resistor (R4) and the first input end of the voltage comparator and is grounded;
the other end of the filter capacitor (C0) is electrically connected with the base electrode of the first transistor (VT 1);
the emitter of the first transistor (VT 1) is electrically connected with the other end of the second resistor (R2) and the input end of the first diode (VD 1);
the output end of the first diode (VD 1) is electrically connected with the other end of the first detection capacitor (C1) and the base electrode of the second transistor (VT 2);
the emitter of the second transistor (VT 2) is electrically connected with the other end of the third resistor (R3) and the input end of the second diode (VD 2);
the output end of the second diode (VD 2) is electrically connected with the other end of the second detection capacitor (C2) and the base electrode of the third transistor (VT 3);
the emitter of the third transistor (VT 3) is electrically connected with the other end of the fourth resistor (R4) and the second input end of the voltage comparator;
the collector electrode of the first transistor (VT 1), the collector electrode of the second transistor (VT 2) and the collector electrode of the third transistor (VT 3) are all electrically connected with a direct current power supply.
In one possible implementation, the second diode (VD 2) is provided with a switch in parallel.
In one possible implementation, the first resistor (R1) is provided as an adjustable resistor.
In a feasible implementation mode, the output end of the voltage measuring circuit is also electrically connected with an upper computer.
In a feasible implementation manner, the upper computer is electrically connected with an output device, and the output device comprises a voice broadcaster and a display screen.
In one possible implementation, the transformer is a coil current transformer.
The embodiment of the application provides a substation electronic fence fault detection system, which comprises a detection system, wherein a mutual inductor, a voltage measurement circuit, a voltage comparator, a power amplifier and an audible and visual alarm which are sequentially and electrically connected, the mutual inductor is connected into a substation electronic fence circuit, the mutual inductor transmits signals to the mutual inductor, the voltage measurement circuit and the voltage comparator which are sequentially connected, when the voltage value passing through the voltage comparator is lower than the preset striking voltage value, the voltage comparator outputs corresponding electric signals to the power amplifier, the power amplifier amplifies the electric signals and then transmits the electric signals to the audible and visual alarm, and the audible and visual alarm gives an alarm to indicate that the electronic fence circuit has faults, so that fault detection on the substation electronic fence circuit is realized; when the detection system is used, operation and maintenance personnel do not need to contact with the lead of the electronic fence, so that the safety is better; and through the striking voltage value of adjustment voltage comparator settlement, can realize carrying out fault detection to the fence of different voltage grades, the suitability is better.
Drawings
Fig. 1 is a schematic circuit block diagram of a substation electronic fence fault detection system according to an embodiment of the present application;
FIG. 2 is a circuit schematic of the voltage measurement circuit of FIG. 1;
fig. 3 is a graph of voltage waveforms in the voltage measurement circuit of fig. 2.
Description of reference numerals:
1. a transformer; 2. a voltage measurement circuit; 3. a voltage comparator; 4. a power amplifier; 5. an audible and visual alarm; 6. an upper computer; 7. and (6) an output device.
Detailed Description
In order to make those skilled in the art better understand the technical solutions in the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
In the description of the embodiments of the present application, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implying any number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present application, "plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.
In the related art, in order to ensure stable operation of the electronic fence, substation operation maintenance personnel need to perform periodic detection on the electronic fence, which requires measurement and detection on the pulse voltage of the electronic fence. The pulse voltage of the electronic fence is measured and detected by a lap joint method.
However, the traditional overlapping method is to short-circuit two wires of the electronic fence by using an insulating rod, and the system alarm indicates that the system is normal, so that when an abnormal life body invades or the electronic fence is subjected to overlapping detection, the electronic fence system can send an alarm, the electronic fence system cannot be easily distinguished to be normal or abnormal life body invaded, and misoperation is easily caused.
Therefore, it is required to provide a substation electronic fence fault detection system, which can perform fault detection on an electronic fence system without the need of an operation maintenance worker to contact an electronic fence wire, and send an alarm when a voltage value in the electronic fence system is lower than a striking voltage value, so as to realize fault detection on a substation electronic fence line, and solve the problem that a misoperation alarm is easily caused when an electronic fence function test and check are performed in an existing substation.
The transformer substation electronic fence fault detection system according to the embodiment of the present application is described in detail below with reference to the accompanying drawings.
Fig. 1 is a schematic circuit block diagram of a substation electronic fence fault detection system according to an embodiment of the present application. Referring to fig. 1, the embodiment of the application provides a substation electronic fence fault detection system, which includes a transformer 1, a voltage measurement circuit 2, a voltage comparator 3, a power amplifier 4 and an audible and visual alarm 5 that are electrically connected in sequence.
The input end of the mutual inductor 1 is connected to a transformer substation electronic fence circuit and used for acquiring a pulse current signal on the transformer substation electronic fence circuit and outputting the pulse current signal to the voltage measuring circuit 2; the voltage measuring circuit 2 generates a pulse voltage signal after receiving the pulse current signal and transmits the pulse voltage signal to the voltage comparator 3; the voltage comparator 3 is used for comparing the pulse voltage signal with a preset striking voltage value, and when the pulse voltage signal is lower than the preset striking voltage value, the voltage comparator 3 outputs a corresponding electric signal to the power amplifier 4; the power amplifier 4 is used for amplifying the electric signal and transmitting the electric signal to the audible and visual alarm 5, and the audible and visual alarm 5 gives an alarm.
The striking voltage is the highest voltage that is not sufficient to strike an invading abnormal living body.
The transformer 1 is connected into a transformer substation electronic fence circuit, the transformer 1 transmits signals to the transformer 1, the voltage measuring circuit 2 and the voltage comparator 3 which are connected in sequence, when the voltage value of the transformer 1 is lower than a preset striking voltage value of the transformer 3, the voltage comparator 3 outputs corresponding electric signals to the power amplifier 4, the power amplifier 4 amplifies the electric signals and then transmits the electric signals to the audible and visual alarm 5, and the audible and visual alarm 5 gives an alarm to indicate that the electronic fence circuit has faults so as to detect the faults on the transformer substation electronic fence circuit; when the detection system is used, maintenance personnel do not need to contact the lead of the electronic fence, and the safety is better; and through the striking voltage value of adjustment voltage comparator 3 settlement, can realize carrying out fault detection to the fence of different voltage grades, the suitability is better.
Fig. 2 is a circuit schematic of the voltage measurement circuit of fig. 1. Referring to fig. 2, in some examples, the voltage measurement circuit 2 includes a first resistor (R1), a second resistor (R2), a third resistor (R3), a fourth resistor (R4), a first transistor (VT 1), a second transistor (VT 2), a third transistor (VT 3), a first diode (VD 1), a second diode (VD 2), a first detection capacitor (C1), a second detection capacitor (C2), and a filter capacitor (C0), wherein one end of the first resistor (R1) is electrically connected to the first output terminal of the transformer 1 and one end of the filter capacitor (C0); the other end of the first resistor (R1) is electrically connected with the second output end of the mutual inductor 1, one end of the second resistor (R2), one end of the first detection capacitor (C1), one end of the third resistor (R3), one end of the second detection capacitor (C2), one end of the fourth resistor (R4) and the first input end of the voltage comparator 3 and is grounded; the other end of the filter capacitor (C0) is electrically connected with the base electrode of the first transistor (VT 1); the emitter of the first transistor (VT 1) is electrically connected with the other end of the second resistor (R2) and the input end of the first diode (VD 1); the output end of the first diode (VD 1) is electrically connected with the other end of the first detection capacitor (C1) and the base electrode of the second transistor (VT 2); the emitter of the second transistor (VT 2) is electrically connected with the other end of the third resistor (R3) and the input end of the second diode (VD 2); the output end of the second diode (VD 2) is electrically connected with the other end of the second detection capacitor (C2) and the base electrode of the third transistor (VT 3); the emitter of the third transistor (VT 3) is electrically connected with the other end of the fourth resistor (R4) and the second input end of the voltage comparator 3; the collector electrode of the first transistor (VT 1), the collector electrode of the second transistor (VT 2) and the collector electrode of the third transistor (VT 3) are all electrically connected with a direct current power supply Ucc.
In the embodiment of the application, the voltage measurement circuit 2 adopts a pulse holding sampling circuit, the sampling holding circuit is composed of a first transistor (VT 1), a second transistor (VT 2), a third transistor (VT 3), a first diode (VD 1), a second diode (VD 2), a first detection capacitor (C1), a second detection capacitor (C2), a filter capacitor (C0) and a coupling resistor, and the pulse voltage amplitude is measured by increasing the charging time and decreasing the discharging time of the detection capacitor.
Fig. 3 is a graph of voltage waveforms in the voltage measurement circuit of fig. 2. Referring to fig. 3, in the specific measurement, the transformer 1 measures the pulse current i (t) on the electronic fence line, and a pulse voltage signal can be obtained through the first resistor (R1):
u(t)＝i(t)·R 1
the pulse voltage signal u (t) passes through an emitter follower formed by a first transistor (VT 1) and then charges a first detection capacitor (C1), when the pulse voltage signal is 0, the first detection capacitor (C1) discharges to a source follower formed by a second transistor (VT 2), because the output resistance of the first transistor (VT 1) is small, the input resistance of the second transistor (VT 2) is large, the charging time constant of the first detection capacitor (C1) is small, and the discharging time constant is large, the charging time of the first detection capacitor (C1) is short, the discharging time is long, and the input voltage u (t) of the second transistor (VT 2) can be obtained C1 (t); input voltage u of the second transistor (VT 2) C1 (t) the second detection capacitor (C2) is charged, and when the pulse voltage signal is 0, the second detection capacitor (C2) discharges to the source follower constituted by the third transistor (VT 3), and since the output resistance of the second transistor (VT 2) is small, the input resistance of the third transistor (VT 3) is large, the charging time constant of the second detection capacitor (C2) is small, and the discharging time constant is large, an approximately constant voltage U can be obtained 0 At this time, U can be measured 0 The value of (1) is that the voltage value U on the electronic fence line is approximately equal to U 0 . The detection method has the advantage that the precision of the detected pulse voltage value is high through two times of charging and discharging of the detection capacitor.
In some examples, the second diode (VD 2) is provided in parallel with a switch S 1 。
In the embodiment of the application, a switch S is arranged in parallel at the second diode (VD 2) 1 When the switch S is on 1 When the detector is closed, the second detection capacitor (C2) can be rapidly discharged, so that the next measurement is facilitated, and the effect of rapid reset is achieved.
In some examples, the first resistance (R1) is provided as an adjustable resistance.
Wherein, the resistance value of the second resistor (R2) is equal to that of the third resistor (R3).
In the embodiment of the application, the first resistor (R1) is an adjustable resistor, and the voltage on the voltage measuring circuit 2 can be adjusted by changing the resistance value of the first resistor (R1), so as to adjust the voltage level of the detection system.
In some examples, the output end of the voltage measuring circuit 2 is also electrically connected with an upper computer 6, and the upper computer 6 is electrically connected with an output device 7.
In the embodiment of the present application, the upper computer 6 analyzes and processes the received voltage signal, and transmits the detection result to the output device 7.
In some examples, the output device 7 includes a voice announcer and a display screen.
Illustratively, the output device 7 also includes a printer.
According to the embodiment of the application, the upper computer 6 broadcasts the testing result through the pronunciation, display screen and printer output are for the operation maintainer of transformer substation, make the operation maintainer of transformer substation need not contact the transformer substation fence circuit and can carry out fault detection to it, and can be real-time accurate demonstration, report and take notes the pulse voltage value in the fence circuit, great guarantee the personal safety of operation maintainer of transformer substation, moreover, still print out the testing result through the printer, be convenient for preserve and follow-up looking up.
In some examples, the transformer 1 is a coil current transformer, one end of a first resistor (R1) is connected with one pin of the coil current transformer, and the first resistor R 1 And the other end of the first pin is connected with the other pin of the coil current transformer.
According to the detection system, the mutual inductor 1, the voltage measuring circuit 2, the voltage comparator 3, the power amplifier 4 and the audible and visual alarm 5 which are sequentially and electrically connected form the detection system, so that the voltage in the electronic fence line can be detected in real time, operation and maintenance personnel can detect the electronic fence line under the condition of not contacting with a lead of the electronic fence, and the safety is good; and through the striking voltage value of adjustment voltage comparator 3 settlement, can realize carrying out fault detection to the fence of different voltage grades, the suitability is better.
The reader should understand that in the description of this specification, reference to the description of the terms "one embodiment," "some embodiments," "in some examples," "specific examples," or "some examples," etc., means that a particular feature, structure, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.
The above embodiments, objects, technical solutions and advantages of the embodiments of the present application are described in further detail, and it should be understood that the above embodiments are only specific embodiments of the present application and are not intended to limit the scope of the embodiments of the present application, and any modifications, equivalent substitutions, improvements and the like made on the basis of the technical solutions of the embodiments of the present application should be included in the scope of the embodiments of the present application.

Claims (7)

1. A transformer substation electronic fence fault detection system is characterized by comprising a transformer, a voltage measurement circuit, a voltage comparator, a power amplifier and an acousto-optic alarm which are electrically connected in sequence;
the input end of the mutual inductor is connected to a transformer substation electronic fence line and used for acquiring a pulse current signal on the transformer substation electronic fence line and outputting the pulse current signal to the voltage measuring circuit;
the voltage measuring circuit generates a pulse voltage signal after receiving the pulse current signal and transmits the pulse voltage signal to the voltage comparator;
the voltage comparator is used for comparing the pulse voltage signal with a preset striking voltage value, and when the pulse voltage signal is lower than the preset striking voltage value, the voltage comparator outputs a corresponding electric signal to the power amplifier;
the power amplifier is used for amplifying the electric signal and transmitting the electric signal to the audible and visual alarm, and the audible and visual alarm gives an alarm.
2. Substation electronic fence fault detection system according to claim 1, characterized in that the voltage measurement circuit comprises a first resistance (R |) 1 ) A second resistor (R) 2 ) A third resistor (R) 3 ) A fourth resistor (R) 4 ) A first transistor (VT) 1 ) A second transistor (VT) 2 ) A third transistor (VT) 3 ) A first diode (VD) 1 ) A second diode (VD) 2 ) A first detection capacitor (C) 1 ) A second detection capacitor (C) 2 ) And a filter capacitor (C) 0 ) Wherein:
the first resistor (R) 1 ) Is electrically connected to the first output terminal of the transformer and the filter capacitor (C) 0 ) One end of (a);
the first resistor (R) 1 ) Is electrically connected with the second output end of the mutual inductor and the second resistor (R) 2 ) One terminal of (a), the first detection capacitor (C) 1 ) One terminal of (d), the third resistance (R) 3 ) One terminal of (a), the second detection capacitor (C) 2 ) One terminal of (d), the fourth resistance (R) 4 ) And a first input terminal of the voltage comparator and to ground;
the filter capacitor (C) 0 ) Is electrically connected to the first transistor (VT) 1 ) A base electrode of (1);
the first transistor (VT) 1 ) Is electrically connected to the second resistor (R) 2 ) And said first diode (VD) 1 ) An input terminal of (1);
the first diode (VD) 1 ) Is electrically connected to the first detection capacitor (C) 1 ) And the other end of the second transistor (VT) 2 ) A base electrode of (1);
the second transistor (VT) 2 ) Is electrically connected to the third resistor (R) 3 ) And said second diode (VD) 2 ) An input terminal of (1);
the second diode (VD) 2 ) Is electrically connected to the second detection capacitor (C) 2 ) And the other end of the third transistor (VT) 3 ) A base electrode of (1);
the third transistor (VT) 3 ) Is electrically connected to the fourth resistor (R) 4 ) And a second input terminal of said voltage comparator;
the first transistor (VT) 1 ) Collector, second transistor (VT) 2 ) Collector and third transistor (VT) 3 ) The collector electrodes of the two-stage converter are all electrically connected with a direct current power supply (Ucc).
3. Substation electronic fence fault detection system according to claim 2, characterized in that said second diode (VD) 2 ) A switch is arranged in parallel.
4. Substation electronic fence fault detection system according to claim 2, characterized in that the first resistance (R) is 1 ) An adjustable resistor is set.
5. The substation electronic fence fault detection system of claim 1, wherein the output end of the voltage measurement circuit is further electrically connected with an upper computer.
6. The substation electronic fence fault detection system of claim 5, wherein the upper computer is electrically connected with an output device, and the output device comprises a voice broadcaster and a display screen.
7. The substation electronic fence fault detection system of claim 1, wherein the transformer is a coil current transformer.
CN202222819730.7U 2022-10-25 2022-10-25 Transformer substation electronic fence fault detection system Active CN218782683U (en)

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Application Number Priority Date Filing Date Title
CN202222819730.7U CN218782683U (en) 2022-10-25 2022-10-25 Transformer substation electronic fence fault detection system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202222819730.7U CN218782683U (en) 2022-10-25 2022-10-25 Transformer substation electronic fence fault detection system

Publications (1)

Publication Number Publication Date
CN218782683U true CN218782683U (en) 2023-03-31

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