CN211554214U

CN211554214U - Wireless control system of impulse voltage generator

Info

Publication number: CN211554214U
Application number: CN201921956235.2U
Authority: CN
Inventors: 王黎明; 李腾飞; 黄锋; 陈坚; 杨来斌
Original assignee: Shanghai Gaolsee Electrical Technology Co ltd; Shanghai Hengnengtai Enterprise Management Co ltd Puneng Power Technology Engineering Branch; State Grid Shanghai Electric Power Co Ltd
Current assignee: Shanghai Gaolsee Electrical Technology Co ltd; Shanghai Hengnengtai Enterprise Management Co ltd Puneng Power Technology Engineering Branch; State Grid Shanghai Electric Power Co Ltd
Priority date: 2019-11-13
Filing date: 2019-11-13
Publication date: 2020-09-22
Anticipated expiration: 2029-11-13

Abstract

The utility model relates to a wireless control system of impulse voltage generator, including host computer and impulse voltage generator, impulse voltage generator connects the quilt sample, still includes control end wireless transceiver module and action end wireless transceiver module, and control end wireless transceiver module is connected with the host computer, and action end wireless transceiver module is connected with impulse voltage generator, and the host computer loops through control end wireless transceiver module and action end wireless transceiver module and connects impulse voltage generator. Compared with the prior art, the utility model has the advantages of reduce in the test process high pressure and electromagnetic signal to the control area in the influence of electrical equipment.

Description

Wireless control system of impulse voltage generator

Technical Field

The invention relates to the field of high voltage tests, in particular to a wireless control system of an impulse voltage generator.

Background

The surge voltage generator is a high voltage generating device which generates pulse waves and is used for researching the insulation performance of electric equipment when the electric equipment is subjected to overvoltage. When various tests such as impact tests are carried out, a PLC (programmable logic controller) is often used for realizing automatic control of the test process, and the reliability and the working efficiency of a control system can be improved by effectively connecting a control program and a control terminal (an upper computer).

At present, cables or optical fibers are generally used as transmission media between a control program and an upper computer, and the transmission media have the advantages that transmission signals are relatively stable and are not easily interfered by external signals. However, the limitation is large because the signal is transmitted by adopting a solid medium, and the transmission distance is influenced by the length of a line; the expansibility is poor, and the wiring work is complicated. And when the line encounters a fault, the difficulty of maintenance is high, and the cost is high.

Disclosure of Invention

The present invention is directed to overcome the above-mentioned drawbacks of the prior art, and provides a wireless control system for a surge voltage generator, which can expand the distance between a control area and a test area, reduce the influence of high voltage and electromagnetic signals on electrical equipment in the control area during a test, facilitate application in a field test, and reduce the wiring cost and the subsequent operation and maintenance cost.

The purpose of the invention can be realized by the following technical scheme:

the utility model provides a wireless control system of impulse voltage generator, includes host computer and impulse voltage generator, impulse voltage generator connects the testee, still includes control end wireless transceiver module and action end wireless transceiver module, control end wireless transceiver module and host computer connection, action end wireless transceiver module is connected with impulse voltage generator, the host computer loops through control end wireless transceiver module and action end wireless transceiver module and connects impulse voltage generator.

The impulse voltage generator comprises a generator body and a control processing unit, wherein one end of the control processing unit is connected with the action end wireless transceiver module, and the other end of the control processing unit is connected with the generator body.

The action end wireless transceiver module is connected with the impulse voltage generator through a serial port.

The wireless transceiver module comprises a power module, a wireless transceiver circuit and a low-power-consumption microcontroller, wherein the output end of the power module is respectively connected with the wireless transceiver circuit and the low-power-consumption microcontroller, and the wireless transceiver circuit is connected with the low-power-consumption microcontroller.

The power module comprises a lithium battery pack and a power detection and protection circuit, and the lithium battery pack is connected with the wireless transceiver circuit and the low-power-consumption microcontroller through the power detection and protection circuit.

The output voltage of the lithium battery pack is 9V.

The power supply detection and protection circuit comprises a battery interface, a first inductor, a first diode, a voltage regulator tube, a gas discharge tube and a first resistor,

the output of battery interface is connected to the one end of first inductance, and the other end connects the positive pole of first diode, the negative pole of stabilivolt and the one end of first resistance respectively, the positive pole ground connection of stabilivolt, the lithium cell group is connected to the negative pole of first diode and the input of battery interface, the other end ground connection of first resistance, the output of battery interface is connected to gas discharge tube's one end, and the other end ground connection.

The generator body comprises a ball distance control end, a switch control end, a charging detection end, a discharging trigger end and a protection control end;

the control processing unit comprises a PLC, a ball distance adjusting module, a switching processing module, a charging processing module, a discharging processing module and a protection processing module.

Compared with the prior art, the invention has the following beneficial effects: the impulse voltage generator is controlled based on a wireless communication mode, physical connection between an upper computer control end and an impulse generator body can be reduced as far as possible, the distance between a control area and a test area can be enlarged, the influence of high voltage and electromagnetic signals on electrical equipment in the control area in the test process is reduced, the application in a field test is facilitated, and meanwhile, the wiring cost and the subsequent operation and maintenance cost are reduced.

Drawings

FIG. 1 is a block diagram of the present invention;

FIG. 2 is a schematic diagram of a power module input power detection and protection circuit;

FIG. 3 is a power module power generation circuit diagram;

FIG. 4 is a circuit diagram of a wireless transceiver;

FIG. 5 is a low power microcontroller circuit diagram;

FIG. 6 is a flow chart of the surge voltage generator operation;

wherein: 1. an upper computer, 2, a control end wireless transceiver module, 3, an action end wireless transceiver module, 4, a control processing unit, 5, a generator body, 6, a tested article, 21, a wireless transceiver circuit of the control end wireless transceiver module, 22, a low-power-consumption microcontroller of the control end wireless transceiver module, 23, a power module of the control end wireless transceiver module, 31, a wireless transceiver circuit of the action end wireless transceiver module, 32, a low-power-consumption microcontroller of the action end wireless transceiver module, 33, the wireless transceiver module of action end's power module, 41, ball distance adjusting module, 42, switching processing module, 43, processing module that charges, 44, processing module that discharges, 45, protection processing module, 51, ball distance control end, 52, switch control end, 53, charge control end, 54, charge detection end, 55, discharge trigger end, 56, protection control end.

Detailed Description

The invention is described in detail below with reference to the figures and specific embodiments. The present embodiment is implemented on the premise of the technical solution of the present invention, and a detailed implementation manner and a specific operation process are given, but the scope of the present invention is not limited to the following embodiments.

The utility model provides a wireless control system of impulse voltage generator, it realizes the communication between control terminal and the control processing unit through wireless transmission's mode, as shown in figure 1, including host computer 1 and impulse voltage generator, impulse voltage generator connects by the examination article 6, still include control end wireless transceiver module 2 and action end wireless transceiver module 3, control end wireless transceiver module 2 is connected with host computer 1, action end wireless transceiver module 3 is connected with impulse voltage generator, host computer 1 loops through control end wireless transceiver module 2 and action end wireless transceiver module 3 and connects impulse voltage generator.

The impulse voltage generator comprises a generator body 5 and a control processing unit 4, one end of the control processing unit 4 is connected with the action end wireless transceiver module 3, and the other end of the control processing unit is connected with the generator body 5. The communication data of the upper computer 1 and the control processing unit 4 are transmitted through the control end wireless transceiving module 2 and the action end wireless transceiving module 3.

The generator body 5 comprises a ball distance control end 51, a switch control end 52, a charging control end 53, a charging detection end 54, a discharging trigger end 55 and a protection control end 56; the control processing unit 4 includes a PLC, a ball distance adjusting module 41, a switching processing module 42, a charging processing module 43, a discharging processing module 44, and a protection processing module 45.

The action end wireless transceiver module 3 is connected with the impulse voltage generator 5 through a serial port.

The control terminal (i.e., the upper computer) in the embodiment is designed into a control working interface convenient for operation by applying professional software VB programming, the running parameters and the measurement results of the system are displayed on the operating interface in a digital quantity form in real time, all the settings of the impulse voltage system, i.e., the charging voltage, the charging time, the triggering mode and the like, can be completed on the operating interface, and the functions of monitoring and measuring the running state and the like are realized, and the functions are relatively independent and are mutually supplemented.

The wireless transceiver module adopts Radio Frequency (RF for short) technology, and comprises a power module, a wireless transceiver circuit and a low-power-consumption microcontroller, wherein the output end of the power module is respectively connected with the wireless transceiver circuit and the low-power-consumption microcontroller, and the wireless transceiver circuit is connected with the low-power-consumption microcontroller.

The power module includes that lithium cell group and power detect and protection circuit, lithium cell group passes through power detect and protection circuit and connects wireless transceiver circuit and low-power consumption microcontroller, the output voltage of lithium cell group is 9V, power detect and protection circuit includes the battery interface, first inductance, first diode, the stabilivolt, gas discharge tube and first resistance, the output of battery interface is connected to the one end of first inductance, the other end is connected the positive pole of first diode respectively, the negative pole of stabilivolt and the one end of first resistance, the anodal ground connection of stabilivolt, lithium cell group is connected to the negative pole of first diode and the input of battery interface, the other end ground connection of first resistance, the output of battery interface is connected to the one end of gas discharge tube, the other end ground connection.

Specifically, the power supply detection and protection circuit can effectively prevent the circuit and the chip from being damaged by accidental transient high voltage. The input power detection and protection circuit is shown in fig. 2. In the circuit, P5 is a battery interface, wherein pin 1 of P5 is connected with pin 1 of a first inductor L3 and pin 1 of a gas discharge tube GDT 1; a pin 2 in the first inductor L3 is connected with a pin 2 in the resistor R34, a pin 1 in the first diode D4 and a pin 1 in the voltage regulator tube D6; the 2 pin in the first diode D4 is output 3.3V; the 2 pin in the stabilivolt D6 is connected to ground. The subsequent voltage generation circuit is shown in fig. 3. Wherein, U5 is a power supply chip (MF 2374). 2 pins in U5 are connected with 2 pins in an inductor L1 and 1 pin in a connecting resistor R36; a pin 7 in U5 is connected with a pin 2 in the resistor R36, a pin 2 in the resistor R37 and a pin 2 in the capacitor C18; pin 1 of the capacitor C18 is connected to pin 1 of the resistor R37, which is in turn connected to ground. 2 pins in the inductor L1 are connected with 2 pins in the capacitor C11 and 1 pin in the capacitor C12; pin 1 of U5 is connected with pin 1 of capacitor C14; the pin 3 in the U5 is connected with the pin 2 in the capacitor C14, the pin 1 in the diode D7 and the pin 1 in the inductor L2; a pin 5 in U5 is connected with a pin 1 in R46 and a pin 1 in R47; a pin 2 in the inductor L2 is connected with a pin 1 in the diode D5, a pin 1 in the capacitor C19, a pin 2 in the resistor R46 and a pin 1 in the resistor R130; a pin 1 in the triode Q7 is connected with a pin 1 in the resistor R67, a pin 1 in the resistor R99 and a pin 2 in the diode D5; the pin 3 in the Q7 is connected with the pin 2 in the resistor R99; the pin 2 in the Q7 is connected with the pin 1 in the resistor R66 and the pin 2 in the resistor R67; a pin 1 in the chip VR1 is connected with a pin 1 in the capacitor C35 and a pin 1 in the capacitor C36; the pin 3 in the chip VR1 is connected with the pin 1 in the capacitor C37 and the pin 1 in the resistor R89.

The wireless transceiver circuit adopts a wireless transceiver chip CC1101 based on the frequency band of 430 MHz-510 MHz. When data is transmitted, for external data from a serial interface, after the external data is received, the CC1101 stores the data in a buffer, then transmits the data to a processor for processing, the processed data is transmitted to a modulator, a signal after passing through the modulator passes through a mixer to adjust the frequency to a proper channel, and finally the signal is transmitted to a differential pin through a power amplifier for data transmission. When the CC1101 receives data, external data is first input from a differential signal pin, processed by a low noise amplifier, and then sent to a mixer, and after a signal generated by the mixer is subjected to AD conversion, gain automatic control and filtering, the signal is sent to a demodulator for error correction and interleaving encoding, and finally a received wireless signal is converted into numerical data and stored in a buffer, and then sent to a microcontroller through a signal pin. The circuit diagram is shown in fig. 4. CC1101 is configured by 4-wire SPI compatible interfaces (SI, SO, SCLK and CSn). This interface serves as both write and read cache data. All processing on the SPI interface works with the same header byte containing a read/write bit, a burst access bit and a 6-bit address. During address and data transitions, the CSn pin (chip select, active low) must remain low. If CSn goes high during the process, the transition is cancelled. When CSn goes low, the MCU must wait until the SO pin goes low before beginning to switch the header byte. This indicates that the voltage modulator has stabilized and the crystal is operating. Unless the chip is in the SLEEP or XOFF state, the SO pin will always go low immediately after CSn goes low.

The main pin of the CC1101 has the following functions that a pin 1 is a VCC pin, needs to be connected with an external power supply and is connected with a pin 1 in JP 1;

pins

16 and 19 are GND pins and are connected with pin 8 in JP 1; pin 2 is a GDO1 pin connected with a JP16 pin; the pin 3 is a pin GDO2 connected with the pin 7 in JP 1; the pin 4 is a VCC pin; pin 5 is connected with pin 1 in the capacitor C51; pin 6 is GDIO0 pin; the pin 7 is a CSN pin connected with a total pin 3 of JP 1; the pin 8 is connected with the pin 1 in the crystal oscillator X1 and the pin 151 in the capacitor; the pin 9 is connected with VCC; the pin 10 is connected with the pin 3 in the crystal oscillator X1 and the pin 151 in the capacitor; 2 pins in the capacitor C15, 2 pins in the capacitor C16 and 2 pins in the capacitor C51 are connected to the ground; the

pins

4 and 2 in the crystal oscillator X1 are connected to the ground. A pin 11 in the chip CC1101 is connected with VCC; the 12 pins are connected with the 1 pin in the inductor L5 and the 1 pin in the capacitor C11; the pin 13 is connected with the pin 1 in the capacitor C6 and the pin 1 in the inductor L2;

pins

14 and 15 are connected with VCC; pin 17 is connected with pin 1 in the capacitor R12; 20 pins are connected with 5 pins in JI 1; the pin 2 of the capacitor R12 is connected to the ground; 2 pins in the inductor L5 are connected with 1 pin in the capacitor C14, and 2 pins in the capacitor C14 are connected with the ground; 2 pins in the capacitor C11 and 2 pins in the inductor L2 are connected with 1 pin in the inductor L3; the pin 2 in the L3 is connected with the pin 1 in the capacitor C13 and the pin 1 in the inductor L4; pin 2 of the capacitor C13 is connected to ground; 2 pins in the inductor L4 are connected with 1 pin in the capacitor C12 and 1 pin in the capacitor C10; pin 2 of the capacitor C12 is connected to ground; the 2 pin of the capacitor C10 is connected with the antenna.

The low power microcontroller employs AT89S 51. The controller has the characteristics of high speed, low power consumption and ultra-strong anti-interference performance, and has abundant on-chip resources, and the circuit of the controller is shown in figure 5. 2 pins in the MCU controller are connected with the MOSI; the pin 3 is connected with the pin 2 in the resistor R2; the pin 5 is connected with the pin 2 in the capacitor C1; the 6 pin is connected with MISO; the pin 7 is connected with the pin 1 in the resistor R1, the pin 1 in the capacitor C3, the pin 1 in the capacitor C2 and the pin 1 in the capacitor C4; the pin 8 is connected with the pin 2 in the resistor R1; the pin 11 is connected with the SCK; pin 12 is connected with pin R4; pin 13 is connected with pin R3; the 14 pin is connected with the CSN; 2 pins of the resistor R2 are connected with 1 pin of the capacitor C1; the 2 pins of the capacitor C4 are connected with the 2 pins of the capacitor C2 and the 2 pins of the capacitor C3. A pin 2 in the resistor R4 is connected with a pin 1 in the D2; a pin 2 in the resistor R3 is connected with a pin 1 in the D1; the 2 pin in D1 is connected with the 2 pin in D2; the 1 pin of the resistor R2 is connected with the power supply.

Control processing unit (i.e. lower computer) and surge voltage generator body:

the ball distance adjusting module is connected with the ball distance control end in the embodiment and used for adjusting the ball distance. The switching processing module is connected with the switch controller and used for switching the power supply. The charging processing module is connected with the charging control end and the charging detection end, the charging processing module sends a charging command to the charging control end, the charging detection end detects voltage in real time and returns the voltage to the charging processing module, and when the charging voltage reaches a preset value, the charging processing module stops charging the impulse voltage generator body. The discharging processing module is connected with the discharging triggering end and used for triggering the ignition ball gap to enable the impulse voltage generator to act. And the protection processing module is connected with the protection control end and is used for controlling the grounding, the emergency stop and the like of the system.

The control flow of the impulse voltage generator in this embodiment is as follows: an operator inputs parameters such as test voltage amplitude, waveform polarity and voltage stabilization time required by the test through the upper computer control end, an upper computer program automatically calculates parameters such as charging speed and required ball gap distance, and the calculated parameters are transmitted to a PLC in the control processing unit through the wireless transmission module. And then the ball distance adjusting module acts to control the ball gap distance, the switching processing module acts to switch on a power supply, the charging processing module acts to enable the impulse voltage generator to start charging, the charging detection end of the impulse voltage generator returns the current voltage value to the charging processing module in real time, the charging is stopped when the voltage reaches the preset voltage value, and the voltage stabilization is carried out for a certain time. After the charging is finished, the discharging processing module sends a trigger signal to the discharging trigger end to cause the ignition ball gap to discharge. After the discharging is finished, the protection control module sends a grounding signal to enable the impulse voltage generator to be grounded and the like. The flow chart is shown in fig. 6.

The embodiment realizes the control of the impulse voltage generator based on wireless communication according to the method, and the control end of the upper computer and the impulse generator body transmit signals in a radio frequency mode, so that the action of the impulse voltage generator is controlled.

Claims

1. The utility model provides a wireless control system of impulse voltage generator, includes host computer and impulse voltage generator, impulse voltage generator connects the testee, its characterized in that still includes control end wireless transceiver module and action end wireless transceiver module, control end wireless transceiver module and host computer connection, action end wireless transceiver module is connected with impulse voltage generator, the host computer loops through control end wireless transceiver module and action end wireless transceiver module and connects impulse voltage generator.

2. The wireless control system of claim 1, wherein the impulse voltage generator comprises a generator body and a control processing unit, one end of the control processing unit is connected to the action end wireless transceiver module, and the other end of the control processing unit is connected to the generator body.

3. The wireless control system of claim 1, wherein the action end wireless transceiver module is connected to the impulse voltage generator via a serial port.

4. The wireless control system of claim 1, wherein the wireless transceiver module comprises a power module, a wireless transceiver circuit and a low power consumption microcontroller, the output terminal of the power module is connected to the wireless transceiver circuit and the low power consumption microcontroller respectively, and the wireless transceiver circuit is connected to the low power consumption microcontroller.

5. The wireless control system of claim 4, wherein the power module comprises a lithium battery pack and a power detection and protection circuit, and the lithium battery pack is connected with the wireless transceiver circuit and the low power consumption microcontroller through the power detection and protection circuit.

6. The wireless control system of claim 5, wherein the output voltage of the lithium battery pack is 9V.

7. The wireless control system of claim 5, wherein the power detection and protection circuit comprises a battery interface, a first inductor, a first diode, a voltage regulator tube, a gas discharge tube and a first resistor,

8. The wireless control system of claim 2, wherein the generator body comprises a ball distance control end, a switch control end, a charging detection end, a discharging trigger end, and a protection control end;