CN203101482U - Metallic oxide arrester leakage current detection device and system - Google Patents
Metallic oxide arrester leakage current detection device and system Download PDFInfo
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Abstract
The utility model discloses a metallic oxide arrester leakage current detection device. The metallic oxide arrester leakage current detection device comprises the following components of: an input end which is connected with a lightning counter of a metallic oxide arrester and receives leakage total current signals of the metallic oxide arrester; a self-adjusting zero-phase difference amplification module which is connected with the input end and receives the leakage total current signals from the input end and performs self-adjusting zero-phase difference amplification on the leakage total current signals; an MCU which is provided with an A/D converter and is connected with the self-adjusting zero-phase difference amplification module and receives signals outputted from the self-adjusting zero-phase difference amplification module, and controls the operation of each module connected with the MCU and processes data; a GPS module which is connected with the MCU and provides synchronous time scale for detection; a memory module which is connected with the MCU and is used for storing data transmitted by the MCU; and a wireless communication module which is connected with the MCU and is used for realizing the data transmission between the MCU and the outside. Correspondingly, the utility model also discloses a metallic oxide arrester leakage current detection system.
Description
Technical field
The utility model relates to a kind of current detecting equipment, relates in particular to a kind of leakage current checkout equipment.
Background technology
Existing MOA(Metal Oxide Arrester, metal oxide arrester) the leakage current detection system mostly is a single equipment, secondary side from voltage transformer (VT) (voltage transformer pt or capacitance type potential transformer CVT) takes out voltage signal respectively, take out current signal from the counter two ends of MOA lower end, simultaneously the voltage signal of the voltage transformer secondary side of homophase and the leakage current signal that flows through MOA are sampled then, use the phase angle difference that certain method calculates voltage and electric current, utilize phase angle difference and circuital effective value to calculate the effective value of current in resistance property.
Present metering system no matter adopt which kind of principle all needs from the voltage transformer secondary side wiring in measuring process.In transformer station, because being carried out wiring, voltage transformer secondary side has certain risk, misoperation can cause problems such as protection would trip, so wiring needs complicated process, causes the measuring process complicated and time consumption.
The utility model content
The purpose of this utility model provides a kind of metal oxide arrester leakage current checkout equipment, it can constitute metal oxide arrester leakage current detection system jointly with the voltage transformer (VT) on-Line Monitor Device, metal oxide arrester leakage current checkout equipment carries out online detection by the voltage signal of wireless receiving voltage transformer (VT) on-Line Monitor Device and the timing signal of leaking full current signal and GPS from the metal oxide arrester that metal oxide arrester leakage current counter end obtains to the metal oxide arrester leakage current.
Another purpose of the present utility model provides a kind of metal oxide arrester leakage current detection system, and it can simplify the testing process of metal oxide arrester leakage current greatly.
The design of the technical program is, based on GPS(Global Positioning System, GPS) and wireless communication technique, the voltage transformer (VT) on-Line Monitor Device is installed near the voltage transformer (VT), on the one hand the voltage transformer secondary side three-phase voltage is carried out on-line monitoring, voltage data when detecting, metal oxide arrester (hereinafter referred MOA) leakage current is provided on the other hand, GPS provides synchronizing signal to make the degree of accuracy of measuring be guaranteed, and the timing signal of data is provided.In measuring process, need not like this from the voltage transformer secondary side wiring, simplified the process of measuring greatly, shortened and measured the required time.Consider that voltage transformer (VT) on-Line Voltage monitoring part is for monitoring CVT (Capacitive Voltage Transformer, capacitance type potential transformer) variation of electric capacity has great importance, for the on-line monitoring object is described, but the adaptable scope of the utility model comprises with any voltage transformer (VT) being the situation of on-line monitoring object to the utility model with CVT.
According to above-mentioned utility model purpose, the utility model proposes a kind of metal oxide arrester leakage current checkout equipment, it comprises:
One input end, it is connected with the lightning stroke counter of metal oxide arrester, receives the leakage full current signal of metal oxide arrester;
One self-adjusting does not have the amplification module of differing, and it is connected with described input end, the leakage full current signal that is received from input end is carried out self-adjusting do not have the amplification of differing;
One MCU is provided with an A/D converter in it, described MCU does not have the amplification module of differing with self-adjusting and is connected, and being received to adjust does not have the signal that differs amplification module output, and controls each module work and the deal with data that is attached thereto;
One GPS module, it is connected with described MCU, and described GPS module provides synchronous time mark for detection;
One memory module, it is connected with described MCU, is used for the data of store M CU transmission;
One wireless communication module, it is connected with described MCU, in order to realize MCU and extraneous data transmission.
In the above-mentioned metal oxide arrester leakage current checkout equipment, self-adjusting does not have and differs amplification module and the leakage full current signal that receives is carried out self-adjusting do not have the amplification of differing, because what this equipment need be measured is accurate angle values, and filtering circuit can produce different phase shifts to the signal of different frequency, and identical circuit structure is because the distributivity influence of component parameters, can make phase shift that certain difference is arranged, this makes troubles for the debugging in later stage, therefore self-adjusting does not have filter structure is not set in the amplification module of differing, but does not have harmonic interference and the white noise that differs the amplification module output signal by the algorithm process self-adjusting by MCU.Wireless communication module is used for the measurement result of store M OA total current, current in resistance property, capacity current and phase differential.
Further; described metal oxide arrester leakage current checkout equipment also comprises: a protection module, and it is connected in described input end and self-adjusting does not have between the amplification module of differing, and one when preventing to detect; the big electric current of the last appearance of MOA causes device damage and injury to personnel.
Further, described metal oxide arrester leakage current checkout equipment also comprises: a host computer interface, it is connected with described memory module.Metal oxide arrester leakage current checkout equipment can be connected with host computer by the host computer interface, and data transmission is analyzed further to host computer.
Further, described metal oxide arrester leakage current checkout equipment also comprises: an input media, it is connected with described MCU, instructs in order to input operation.
Further, described metal oxide arrester leakage current checkout equipment also comprises: a display device, it is connected with described MCU, detects data in order to show testing result and each.
Further, described metal oxide arrester leakage current checkout equipment is a portable handheld terminal.
Alternatively, described self-adjusting does not have the amplification module of differing and comprises:
3 pin of 1 the 11 amplification module connect an end of described protection module output signal, 2 pin connect the other end of described protection module output signal, 8 pin link to each other by one the 24 resistance with 1 pin, 7 pin and 4 pin connect power supply, 5 pin link to each other with an end of one the 33 resistance, and 6 pin link to each other with an end of one the 21 resistance;
1 pin of 1 the 12 voltage follower links to each other with the other end of described the 21 resistance, 5 pin link to each other with power supply, 2 pin ground connection, 3 pin link to each other with 4 pin and are connected respectively to 13,14,15,12 pin of 1 the 16 analog switch by one the 28 resistance, one the 29 resistance, one the 30 resistance, one the 31 resistance, 16 pin and 7 pin of described the 16 analog switch connect power supply, 3 pin connect an end of one the 32 resistance, 11 pin, 10 pin, 6 pin connect gain and select signal, 9 pin, 8 pin ground connection;
1 pin of described the 18 voltage follower connects the other end of described the 33 resistance, 5 pin connect power supply, 2 pin ground connection, 3 pin connect the other end of described the 32 resistance, and receive an end of one the 27 resistance, 4 pin are received the other end of described the 27 resistance and are not had the output signal end that differs amplification module as described self-adjusting.
Alternatively, described self-adjusting does not have the amplification module of differing and comprises:
4 pin of 1 the 13 amplification module connect an input end of full current signal, 1 pin connects another input end of full current signal, 3 pin are by 1 the 18 resistance, 1 the 19 resistance, one the 20 resistance, one the 25 resistance respectively with 13 pin of 1 the 14 analog switch, 14 pin, 15 pin link to each other with 12 pin, 2 pin link to each other with 3 pin of described the 14 analog switch, 8 pin and 5 pin connect power supply, 6 pin connect 7 pin of one the 9th amplification module B, 7 pin link to each other with an end of one the 22 resistance, and the other end of described the 22 resistance does not have the output signal end that differs amplification module as described self-adjusting;
16 pin and 7 pin of described the 14 analog switch connect power supply, and 11 pin, 10 pin, 6 pin connect gain and select signal, 9 pin, 8 pin ground connection;
One termination power of 1 the 11 resistance, the negative pole of its another termination 1 the tenth voltage stabilizing diode, and link to each other with an end of 1 the 12 resistance, the plus earth of described the tenth voltage stabilizing diode, the other end of described the 12 resistance links to each other with the positive pole of one the 5th electrochemical capacitor, and, be connected to 3 pin of one the 9th amplification module and 5 pin of described the 9th amplification module simultaneously by described the 5th electrochemical capacitor, 1 the 16 electric capacity, 1 the 15 resistance and one the 22 capacity earth;
2 pin of described the 9th amplification module are connected to 1 pin by one the 8th resistance simultaneously and export for described MCU use as the reference level by 1 the tenth resistance eutral grounding, and 8 pin connect power supply, 4 pin ground connection;
6 pin of described the 9th amplification module are connected to 7 pin by 1 the 16 resistance simultaneously by 1 the 13 resistance eutral grounding.
Further, the interface circuit of described GPS module adds a phase inverter at GPS pps pulse per second signal end.
Further, the interface circuit of described wireless communication module connects a reverse and door on matching addresses end and data ready end.
In addition, the utility model also provides a kind of metal oxide arrester leakage current detection system, it comprises: above-mentioned metal oxide arrester leakage current checkout equipment, this metal oxide arrester leakage current checkout equipment is connected with at least one voltage transformer (VT) on-Line Monitor Device by its wireless communication module.
Metal oxide arrester leakage current checkout equipment described in the utility model has the following advantages and good effect owing to adopted above technical scheme:
(1) MOA leakage current checkout equipment can be used as the main frame of the current in resistance property measuring system of a plurality of transformer stations, promptly adopts a portable checkout equipment of MOA just can carry out the MOA testing current in resistance property to a plurality of transformer stations that the especially online CVT pick-up unit of on-Line Voltage mutual inductor testing apparatus has been installed.
(2) in measuring process, need not from the voltage transformer secondary side wiring, simplified the process of measuring greatly, shortened and measured the required time.
(3) in optimized technical scheme, portable handheld terminal is easy to use.
In addition, metal oxide arrester leakage current detection system described in the utility model also has above-mentioned beneficial effect.
Description of drawings
Fig. 1 is the structural representation of MOA leakage current checkout equipment described in the utility model under a kind of embodiment.
Fig. 2 is the circuit structure diagram of protection module described in the utility model under a kind of embodiment.
Fig. 3 and Fig. 4 are that self-adjusting described in the utility model does not have the circuit structure diagram under a kind of embodiment that differs amplification module.
Fig. 5 and Fig. 6 are that self-adjusting described in the utility model does not have the circuit structure diagram under the another kind of embodiment that differs amplification module.
Fig. 7 is the circuit structure diagram under a kind of embodiment of memory module described in the utility model.
Fig. 8 is the circuit structure diagram under a kind of embodiment of interface circuit of GPS module described in the utility model.
Fig. 9 is the circuit structure diagram under a kind of embodiment of interface circuit of wireless communication module described in the utility model.
Figure 10 is the circuit structure diagram under a kind of embodiment of interface circuit of input media described in the utility model.
Figure 11 is the circuit structure diagram under a kind of embodiment of interface circuit of display device described in the utility model.
Figure 12 is the circuit structure diagram under a kind of embodiment of first order power circuit described in the utility model.
Figure 13 is the circuit structure diagram under a kind of embodiment of the second level described in the utility model power circuit.
Figure 14 is the circuit structure diagram under a kind of embodiment of third level power circuit described in the utility model.
Embodiment
Below in conjunction with Figure of description and specific embodiment MOA leakage current checkout equipment described in the utility model is described in further detail.
MOA leakage current checkout equipment as described in Figure 1 comprises: input end, and it is connected with the lightning stroke counter of metal oxide arrester, receives the leakage full current signal of metal oxide arrester; Protection module 1 is connected with input end, carries out overcurrent protection; Self-adjusting does not have the amplification module of differing 2 and is connected with protection module, the signal that receives is carried out self-adjusting do not have the amplification of differing; MCU3 does not have the amplification module of differing 2 with self-adjusting and is connected, and also is connected respectively with memory module 4, GPS module 6, wireless communication module 7, keyboard 8 and display screen 9, and host computer interface 5 is connected with memory module.Wherein, MCU3 does not have the signal that differs amplification module 2 and handles being received from self-adjusting, and each module work of being attached thereto of control; Memory module 4 store M OA leakage current and related datas thereof; GPS module 6 provides accurate synchronous time mark for measurement; The power module 10 that links to each other with each module, for each module provides power supply, comprise the first order of 12V power supply power circuit is provided, provides+5V and-second level power circuit of 5V power supply and provide 4.5V and the third level power circuit of 3.3V power supply.
Figure 12 has shown in one embodiment, the circuit structure of first order power supply.As shown in figure 12: 4 pin of rectifier bridge U15 and 2 pin connect the output of prime transformer, 3 pin ground connection, and 1 pin is by electrochemical capacitor E9, electrochemical capacitor E8, capacitor C 30 ground connection, and 1 pin connects 1 pin of Voltage stabilizing module U17 simultaneously; 3 pin of Voltage stabilizing module U17 connect the anodal of diode D7 and connect 1 pin by diode D7,2 pin ground connection, and 3 pin are by capacitor C 31 ground connection, and 3 pin are as power supply+12VE output.
Figure 13 has shown in one embodiment, the circuit structure of second level power supply, as shown in Figure 2: 1 pin of DC/DC modular converter U19 is connected with power supply+12VE by inductance L 4,2 pin ground connection also are connected with power supply+12VE by an electrochemical capacitor E12,3 pin link to each other with 5 pin with electrochemical capacitor E10 by parallel resistor R34,4 pin link to each other with 5 pin with an electrochemical capacitor E13 by parallel resistor R36,3 pin connect 1 pin of inductor L3,5 pin connect 2 pin of inductor L3 and 1 pin of inductor L5, and 4 pin connect 2 pin of inductor L5; 4 pin of inductor L3 pass through electrochemical capacitor E11 ground connection, 3 pin ground connection, and 4 pin are as power supply+5V output; 3 pin of inductor L5 pass through electrochemical capacitor E14 ground connection, 4 pin ground connection, and 3 pin are as power supply-5V output; 1 pin of voltage stabilizer U20 meets power supply+12VE, and by voltage stabilizing diode D9, electrochemical capacitor E15 and capacitor C 39 ground connection in parallel, 5 pin ground connection, 4 pin are by electrochemical capacitor E16 and capacitor C 40 ground connection in parallel, 4 pin are received 2 pin by inductor L6,2 pin pass through voltage stabilizing diode D10 ground connection, 3 pin and 6 pin ground connection, and 4 pin are as power supply+5VDC output.
Figure 14 has shown in one embodiment, the circuit structure of third level power supply.As shown in figure 14: 3 pin of power module U22 and 4 pin are by electrochemical capacitor E17 and capacitor C 42 ground connection in parallel, 3 pin and 4 pin meet power supply+5VDC, 2 pin and 1 pin ground connection, 6 pin and 5 pin are by electrochemical capacitor E19 ground connection, connect 7 pin by resistance R 39 simultaneously, 7 pin are by resistance R 41 ground connection, and 6 pin and 5 pin are as power supply+4V5D output; 3 pin of power module U23 and 4 pin are by electrochemical capacitor E18 and capacitor C 43 ground connection in parallel, 3 pin and 4 pin meet power supply+5VDC, 2 pin and 1 pin ground connection, and 6 pin and 5 pin are by electrochemical capacitor E20 ground connection, connect 7 pin by resistance R 40 simultaneously, 6 pin and 5 pin are as power supply+3V3D output.
The 4.5V voltage of wireless communication module is that TPS76801 provides.TPS76801 is the power supply chip of an Adjustable Output Voltage, and its other parameter is similar to TPS76833, and the calculating formula of output voltage is:
V wherein
REFBe the internal reference level, equal 1.1834V, R39 is the 39 resistance, and R41 is the 41 resistance.Choosing R39 is 45K Ω, and R41 is 16 Ω, and Shu Chu voltage can get according to formula 6-1 like this
R39 and R41 use 1% resistance, and like this, in the problem of considering the drift of TPS76801 output voltage, output voltage under worst condition is:
The voltage range of output voltage is: 4.359V＜V
O＜4.671V can satisfy the needs of wireless communication module.
Fig. 2 has shown the circuit structure of the protection module 1 under a kind of embodiment.As shown in Figure 2, one input end of one termination full current signal of resistance R 23, and link to each other with the parallel resistor R17 of an end ground connection and the other end of capacitor C 27, and link to each other with the end of a two-way breakdown diode D5, and link to each other an end of protection module 1 output signal with the end of the diac D4 that holds ground connection one by one; Another input end of another termination full current signal of resistance R 23; and link to each other with the other end of capacitor C 28 with the parallel resistor R26 that holds ground connection one by one; and link to each other with the other end of diac D5; and link to each other with the end of the diac D6 that holds ground connection one by one, as the other end of protection module 1 output signal.
Fig. 3 and Fig. 4 have shown that the self-adjusting under a kind of embodiment do not have the circuit structure that differs amplification module 2.As shown in Figure 3 and Figure 4: 3 pin of amplification module U11 connect an end of protection module 1 output signal, 2 pin connect the other end of protection module 1 output signal, 8 pin link to each other by resistance R 24 with 1 pin, 7 pin meet power supply+5V, 4 pin meet power supply-5V, 5 pin link to each other with an end of resistance R 33, and 6 pin link to each other with an end of resistance R 21; 1 pin of voltage follower U12 links to each other with the other end of resistance R 21,5 pin link to each other with power supply+3V3A, 2 pin ground connection, 3 pin link to each other with 4 pin and are connected respectively to 13,14,15,12 pin of analog switch U16 by resistance R 28, resistance R 29, resistance R 30, resistance R 31,16 pin of analog switch U16 meet power supply+5V, and 7 pin meet power supply-5V, the end of 3 pin connecting resistance R32,11 pin, 10 pin, 6 pin connect gain and select signal, 9 pin, 8 pin ground connection; The other end of the 1 pin connecting resistance R33 of voltage follower U18,5 pin meet power supply+3V3A, 2 pin ground connection, the other end of 3 pin connecting resistance R32, and receive an end of resistance R 27,4 pin are received the other end of resistance R 27 and are not had the output signal end that differs amplification module 2 as self-adjusting.Resistance R 28, resistance R 29, resistance R 30, resistance R 31 are amplified figure place for corresponding respectively four kinds.Be taken as 5.1k Ω, 10k Ω, 20k Ω and 100k Ω respectively, resistance R 27 is taken as 100k Ω, so enlargement factor is respectively:
Add 10 times of amplifications of prime, altogether the voltage on the measuring resistance has been amplified 200 times, 100 times, 50 times and 10 times respectively.
In another embodiment, self-adjusting do not have differ amplification module 2 circuit structure as shown in Figure 5 and Figure 6:
4 pin of amplification module U13 connect an input end of full current signal, 1 pin connects another input end of full current signal, 3 pin link to each other with 13 pin, 14 pin, 15 pin and 12 pin of analog switch U14 respectively by resistance R 18, resistance R 19, resistance R 20, resistance R 25,2 pin link to each other with 3 pin of analog switch U14,8 pin meet power supply+5V, 5 pin meet power supply-5V, 6 pin connect 7 pin of amplification module U9B, 7 pin link to each other with an end of resistance R 22, and the other end of resistance R 22 does not have the output signal end that differs amplification module 2 as self-adjusting; 16 pin of analog switch U14 meet power supply+5V, and 7 pin meet power supply-5V, and 11 pin, 10 pin, 6 pin connect gain and select signal, 9 pin, 8 pin ground connection; One termination power of resistance R 11+3V3A, the negative pole of its another termination voltage stabilizing diode U10, and link to each other with an end of resistance R 12, the plus earth of voltage stabilizing diode U10, the other end of resistance R 12 links to each other with the positive pole of electrochemical capacitor E5, and, be connected to 3 pin of amplification module U9A and 5 pin of amplification module U9B simultaneously by electrochemical capacitor E5, capacitor C 16, resistance R 15 and capacitor C 22 ground connection; 2 pin of amplification module U9A are connected to 1 pin by resistance R 8 simultaneously and export the use for MCU as reference level Vref by resistance R 10 ground connection, and 8 pin meet power supply+3V3A, 4 pin ground connection; 6 pin of amplification module U9B are connected to 7 pin by resistance R 16 simultaneously by resistance R 13 ground connection.Voltage stabilizing diode U10 voltage stabilizing value is 1.25V, branch hydraulic circuit input datum loop of forming by resistance R 12 and resistance R 15 and the positive input terminal of lifting hydraulic circuit, so datum with lift voltage level and be respectively:
Get R12=1k Ω, R15=1k Ω, R8=3k Ω, R10=1k Ω, R16=1k Ω and R13=1k Ω, the datum that calculates and to lift hydraulic circuit as follows.
Fig. 7 has shown memory module 4 circuit structure in one embodiment.As shown in Figure 7: 2 pin of EPROM (Erasable Programmable Read Only Memory) U6,5 pin and 6 pin connect the serial sync cap respective signal of MCU3 and described host computer interface module 5,3 pin connect 8 pin by resistance R 4,8 pin connect 7 pin by resistance R 5,8 pin link to each other with the negative pole of diode D2 with diode D1, the positive pole of diode D1 and diode D2 meets the USB power supply+3V3D and the power supply+3V3D of described host computer respectively, 4 pin ground connection.The AT25640 capacity is 64K, with the 3.3V power supply, uses serial sync cap (SPI) and master controller C8051F040, USB controller C8051F320 communication.SCK, MOSI and MISO SPI interface among the figure for picking out from C8051F040; Flash_SCK, Flash_MOSI and Flash_MISO SPI interface for picking out from C8051F320.Two controllers all can be read and write AT25640, but can not read while write.
As shown in Figure 8, the interface circuit of GPS module 6 adds a phase inverter at GPS pps pulse per second signal end.The interface circuit of GPS module 6 has added a reverser SN74AHC1G00 at the PPS of GPS end, with the external interrupt electricity consumption drops that solves C8051F040 along the problem that triggers.TX end and RX end are the communication port of universal asynchronous receiving-transmitting (UART).
As shown in Figure 9, the interface circuit of wireless communication module 7 connects a reverse and door on AM end and DR end.The interface circuit of wireless communication module is at AM(Address Match) end and DR(Data Ready) connect on the end one oppositely with.The sign that wireless communication module receives data is exactly that AM and DR put height simultaneously, adds an external interrupt that oppositely and behind the door just can be used for triggering C8051F040.
As shown in figure 10, load module 8 is a keyboard, and 1 pin of the interface circuit of keyboard meets power supply+3V3D, 6 pin ground connection, and the 2-5 pin connects the external input signal of S1-S4.
As shown in figure 11, display module 9 is a LCD, 1 pin of the interface circuit of LCD, 18 pin and 20 pin ground connection, 2 pin meet power supply+3V3D, 3 pin connect the adjustable end of one the 9th adjustable resistance R9, and 17 pin are received an end of one the 7th resistance R 7, the other end ground connection of R7 by the 9th adjustable resistance R9,19 pin meet power supply+5VDC by 1 the 14 resistance, and the 4-16 pin connects the data and the control signal of LCD.
Be noted that above enumerate only for specific embodiment of the utility model, obviously the utility model is not limited to above embodiment, and many similar variations are arranged thereupon.If those skilled in the art all should belong to protection domain of the present utility model from all distortion that the disclosed content of the utility model directly derives or associates.
Claims (11)
1. a metal oxide arrester leakage current checkout equipment is characterized in that, comprising:
One input end, it is connected with the lightning stroke counter of metal oxide arrester, receives the leakage full current signal of metal oxide arrester;
One self-adjusting does not have the amplification module of differing, and it is connected with described input end, the leakage full current signal that is received from input end is carried out self-adjusting do not have the amplification of differing;
One MCU is provided with an A/D converter in it, described MCU does not have the amplification module of differing with self-adjusting and is connected, and being received to adjust does not have the signal that differs amplification module output, and controls each module work and the deal with data that is attached thereto;
One GPS module, it is connected with described MCU, and described GPS module provides synchronous time mark for detection;
One memory module, it is connected with described MCU, is used for the data of store M CU transmission;
One wireless communication module, it is connected with described MCU, in order to realize MCU and extraneous data transmission.
2. metal oxide arrester leakage current checkout equipment according to claim 1 is characterized in that, also comprises: a protection module, it is connected in described input end and self-adjusting does not have between the amplification module of differing.
3. metal oxide arrester leakage current checkout equipment according to claim 1 is characterized in that, also comprises: a host computer interface, it is connected with described memory module.
4. metal oxide arrester leakage current checkout equipment according to claim 1 is characterized in that, also comprises: an input media, it is connected with described MCU.
5. metal oxide arrester leakage current checkout equipment according to claim 1 is characterized in that, also comprises: a display device, it is connected with described MCU.
6. according to arbitrary described metal oxide arrester leakage current checkout equipment among the claim 1-5, it is characterized in that described metal oxide arrester leakage current checkout equipment is a portable handheld terminal.
7. metal oxide arrester leakage current checkout equipment according to claim 2 is characterized in that, described self-adjusting does not have the amplification module of differing and comprises:
3 pin of 1 the 11 amplification module (U11) connect an end of described protection module output signal, 2 pin connect the other end of described protection module output signal, 8 pin link to each other by one the 24 resistance (R24) with 1 pin, 7 pin and 4 pin connect power supply, 5 pin link to each other with an end of one the 33 resistance (R33), and 6 pin link to each other with an end of one the 21 resistance (R21);
1 pin of 1 the 12 voltage follower (U12) links to each other with the other end of described the 21 resistance (R21), 5 pin link to each other with power supply, 2 pin ground connection, 3 pin link to each other with 4 pin and pass through one the 28 resistance (R28), one the 29 resistance (R29), one the 30 resistance (R30), one the 31 resistance (R31) is connected respectively to 13 of 1 the 16 analog switch (U16), 14,15,12 pin, 16 pin and 7 pin of described the 16 analog switch (U16) connect power supply, 3 pin connect an end of one the 32 resistance (R32), 11 pin, 10 pin, 6 pin connect gain and select signal, 9 pin, 8 pin ground connection;
1 pin of the 18 voltage follower (U18) connects the other end of described the 33 resistance (R33), 5 pin connect power supply, 2 pin ground connection, 3 pin connect the other end of described the 32 resistance (R32), and receive an end of one the 27 resistance (R27), 4 pin are received the other end of described the 27 resistance (R27) and are not had the output signal end that differs amplification module as described self-adjusting.
8. metal oxide arrester leakage current checkout equipment according to claim 2 is characterized in that, described self-adjusting does not have the amplification module of differing and comprises:
4 pin of 1 the 13 amplification module (U13) connect an input end of full current signal, 1 pin connects another input end of full current signal, 3 pin are by 1 the 18 resistance (R18), 1 the 19 resistance (R19), one the 20 resistance (R20), one the 25 resistance (R25) respectively with 13 pin of 1 the 14 analog switch (U14), 14 pin, 15 pin link to each other with 12 pin, 2 pin link to each other with 3 pin of described the 14 analog switch (U14), 8 pin and 5 pin connect power supply, 6 pin meet one the 9th amplification module B(U9B) 7 pin, 7 pin link to each other with an end of one the 22 resistance (R22), and the other end of described the 22 resistance (R22) does not have the output signal end that differs amplification module as described self-adjusting;
16 pin and 7 pin of described the 14 analog switch (U14) connect power supply, and 11 pin, 10 pin, 6 pin connect gain and select signal, 9 pin, 8 pin ground connection;
One termination power of 1 the 11 resistance (R11), the negative pole of its another termination 1 the tenth voltage stabilizing diode (U10), and link to each other with an end of 1 the 12 resistance (R12), the plus earth of described the tenth voltage stabilizing diode (U10), the other end of described the 12 resistance (R12) links to each other with the positive pole of one the 5th electrochemical capacitor (E5), and by described the 5th electrochemical capacitor (E5), 1 the 16 electric capacity (C16), 1 the 15 resistance (R15) and one the 22 electric capacity (C22) ground connection are connected to 3 pin of one the 9th amplification module and 5 pin of described the 9th amplification module simultaneously;
2 pin of described the 9th amplification module are connected to 1 pin by one the 8th resistance (R8) simultaneously and export for described MCU use as reference level (Vref) by 1 the tenth resistance (R10) ground connection, and 8 pin connect power supply, 4 pin ground connection;
6 pin of described the 9th amplification module are connected to 7 pin by 1 the 16 resistance (R16) simultaneously by 1 the 13 resistance (R13) ground connection.
9. metal oxide arrester leakage current checkout equipment according to claim 1 is characterized in that the interface circuit of described GPS module adds a phase inverter at GPS pps pulse per second signal end.
10. metal oxide arrester leakage current checkout equipment according to claim 1 is characterized in that, the interface circuit of wireless communication module connects a reverse and door on matching addresses end and data ready end.
11. metal oxide arrester leakage current detection system, it comprises: metal oxide arrester leakage current checkout equipment as claimed in claim 6, described metal oxide arrester leakage current checkout equipment is connected with at least one voltage transformer (VT) on-Line Monitor Device by its wireless communication module.
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| CN 201320016618 CN203101482U (en) | 2013-01-11 | 2013-01-11 | Metallic oxide arrester leakage current detection device and system |
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| CN 201320016618 CN203101482U (en) | 2013-01-11 | 2013-01-11 | Metallic oxide arrester leakage current detection device and system |
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| CN203101482U true CN203101482U (en) | 2013-07-31 |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103454560A (en) * | 2013-09-03 | 2013-12-18 | 辽宁工程技术大学 | Pollution flashover monitoring device |
| CN103675593A (en) * | 2013-12-11 | 2014-03-26 | 国家电网公司 | Electrification testing system and method for zinc oxide arrester in armored cabinet |
| CN103792415A (en) * | 2014-02-13 | 2014-05-14 | 国家电网公司 | Anti-interference device for lightning arrester leakage current detection |
| CN106645825A (en) * | 2017-01-20 | 2017-05-10 | 国网河南省电力公司电力科学研究院 | Lightning arrester live-line test overvoltage protection special test wire |
| CN106908646A (en) * | 2015-12-22 | 2017-06-30 | 国网辽宁省电力有限公司沈阳供电公司 | Portable arrester live detection instrument based on wireless synchronization technology |
| CN107167698A (en) * | 2017-07-20 | 2017-09-15 | 云南电网有限责任公司电力科学研究院 | A kind of leakage current of an arrester live testing device and method |
| CN115932648A (en) * | 2022-12-30 | 2023-04-07 | 西安远测电力科技有限公司 | Wireless intelligent sensor device for monitoring resistive current of lightning arrester |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103454560A (en) * | 2013-09-03 | 2013-12-18 | 辽宁工程技术大学 | Pollution flashover monitoring device |
| CN103454560B (en) * | 2013-09-03 | 2017-06-23 | 辽宁工程技术大学 | Pollution flashover monitoring device |
| CN103675593A (en) * | 2013-12-11 | 2014-03-26 | 国家电网公司 | Electrification testing system and method for zinc oxide arrester in armored cabinet |
| CN103792415A (en) * | 2014-02-13 | 2014-05-14 | 国家电网公司 | Anti-interference device for lightning arrester leakage current detection |
| CN106908646A (en) * | 2015-12-22 | 2017-06-30 | 国网辽宁省电力有限公司沈阳供电公司 | Portable arrester live detection instrument based on wireless synchronization technology |
| CN106908646B (en) * | 2015-12-22 | 2018-11-02 | 国网辽宁省电力有限公司沈阳供电公司 | Portable arrester live detection instrument based on wireless synchronization technology |
| CN106645825A (en) * | 2017-01-20 | 2017-05-10 | 国网河南省电力公司电力科学研究院 | Lightning arrester live-line test overvoltage protection special test wire |
| CN107167698A (en) * | 2017-07-20 | 2017-09-15 | 云南电网有限责任公司电力科学研究院 | A kind of leakage current of an arrester live testing device and method |
| CN107167698B (en) * | 2017-07-20 | 2020-02-07 | 云南电网有限责任公司电力科学研究院 | Lightning arrester leakage current live-line test device and method |
| CN115932648A (en) * | 2022-12-30 | 2023-04-07 | 西安远测电力科技有限公司 | Wireless intelligent sensor device for monitoring resistive current of lightning arrester |
| CN115932648B (en) * | 2022-12-30 | 2024-02-02 | 西安远测电力科技有限公司 | Wireless intelligent sensor device for monitoring resistive current of lightning arrester |
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