WO2019174075A1

WO2019174075A1 - Direct current high-voltage live display locking device

Info

Publication number: WO2019174075A1
Application number: PCT/CN2018/081665
Authority: WO
Inventors: 丁海荣; 王炜; 汤永春
Original assignee: 镇江华源晋昌电器有限公司
Priority date: 2018-03-16
Filing date: 2018-04-03
Publication date: 2019-09-19
Also published as: CN108196135A

Abstract

A direct current high-voltage live display locking device, comprising a sensor and a display. A working circuit is packaged in the display; a lower lead of the sensor is connected to a compensation module and then connected to an input protection module; a signal of the input protection module is input to a signal processing module; a signal of a self-detection module is input to the signal processing module; a signal of a self-setting module is input to the signal processing module; the signal processed by the signal processing module is then transmitted to a detection module; the working circuit further comprises a programmable control circuit; and the signal of the self-detection module and the signal of the detection module are transmitted to the programmable control circuit, processed by the programmable control circuit, and then transmitted to a device self-detection unit, a voice unit, a flash unit, and a locking circuit. The direct current high-voltage live display locking device further comprises a power supply module, and the power supply module provides power for the whole device.

Description

DC high voltage live display locking device

Technical field

The invention relates to the technical field of protection of UHV transmission equipment, in particular to a DC high voltage charging display locking device.

Background technique

In China, high-voltage AC transmission and distribution lines and equipment, high-voltage live display devices have been widely used. With the construction of UHV DC transmission and distribution lines and the use of switchgear in China, the high-voltage DC live display locking device used with it is an indispensable product configuration.

The existing high-voltage live display locking devices are high-voltage AC live display blocking devices, and the input signals are susceptible to monitoring errors caused by gradual aging of cables and changes in natural space conditions, and the high-voltage live display locking device is interfered by an external environment. In the case of thunderstorms, the high-voltage charging shows that the current of the locking device will drain, affecting the normal operation of other equipment.

The DXW-ZL high-voltage live display locking device developed by our company is mainly an online high-voltage live monitoring device designed for power system DC UHV substation. It can monitor the DC incoming line high-voltage incoming line in real time to ensure safe operation of power production.

Summary of the invention

The object of the present invention is to provide a DC high voltage live display blocking device capable of real-time online monitoring of the DC incoming line high voltage incoming line to ensure safe operation of power production.

The technical solution adopted by the present invention is as follows:

A DC high-voltage live display locking device, comprising a sensor and a display, the working circuit is packaged in the display, the working circuit comprises a compensation module, an input containing module, a signal processing module, a self-test module, a self-setting module, a wave detecting module, and a sensor The lower lead is connected to the compensation module and connected to the input protection module. The signal input to the protection module is input to the signal processing module, the signal of the self-test module is input to the signal processing module, and the signal of the self-setting module is input to the signal processing module, and the signal processing module The processed signal is transmitted to the wave module, and the working circuit further includes a programmable control circuit. The signal of the self-test module and the signal of the wave detection module are transmitted to the programmable control circuit, and then processed by the programmable control circuit and then transmitted to the device. The detecting unit, the voice unit, the flash unit and the latching circuit further comprise a power module, and the power module provides power supply for the entire device.

According to a further improvement of the invention, the power module adopts AC/DC: 110/220V.

According to a further improvement of the present invention, the display has a total of 19 wiring ports: wherein the 1, 2, and 3 wiring ports are sensor introduction signal lines; the 4, 5, and 6 wiring ports are fault alarm input nodes; and the 7, 8, and 9 wiring ports are charged. Signal output node; 10, 11, 12, 13, 14, 15, 16, 17, 18 wiring ports are three pairs of blocking nodes; 19 wiring ports are grounded; when the measured line is charged, the 7, 8, and 9 wiring ports are closed. 17, 18 wiring is closed; when the line under test is not charged, 10-18 three pairs of blocking nodes are closed.

According to a further improvement of the present invention, an indicator light is arranged outside the display, and the indicator light is connected to the flash unit, and the indicator light is divided into a live indicator light, a working power indicator light and an operation indicator light.

A further improvement of the present invention also includes a voice alarm, the voice alarm is packaged in the display, and the voice alarm is coupled to the voice unit.

According to a further improvement of the present invention, an outer casing is disposed outside the display, the outer casing is sprayed with a waterproof layer, and the waterproof layer is sprayed with an insulating layer.

The invention has the advantages that the invention is a novel inductive high-voltage electrification monitoring device, which is not in direct contact with a charged body, has convenient installation, low maintenance cost and long service life; the device has advanced design, reasonable structure, complete functions, safety and reliability. The utility model has the functions of flash display, audible alarm, self-checking and starting forced locking circuit, and has obvious directionality, high sensitivity and reliability; the invention is applicable to a DC UHV line with a DC rated voltage of 10-10000 kV, Reflecting the state of charge is an ideal safety device to prevent electrical misoperation on DC electrical networks or equipment.

DRAWINGS

BRIEF DESCRIPTION OF THE DRAWINGS Figure 1 is a circuit diagram of the operation of the present invention.

2 is a schematic structural view of a display of the present invention.

Figure 3 is a schematic view showing the structure of the sensor of the present invention.

Figure 4 is a wiring diagram of the display of the present invention.

detailed description

The present invention will be further described in detail with reference to the accompanying drawings and the accompanying drawings.

Embodiments: As shown in FIG. 1 , FIG. 2 and FIG. 3 , a DC high-voltage live display blocking device includes a sensor and a display, and a working circuit is packaged in the display, and the working circuit includes a compensation module, an input containing module, and a signal processing module. The self-test module, the self-setting module, the wave check module, the lower lead of the sensor is connected with the compensation module, and is connected to the input protection module, the signal input to the protection module is input to the signal processing module, and the signal of the self-test module is input to the signal processing module. The signal of the self-setting module is input to the signal processing module, and the signal processed by the signal processing module is transmitted to the wave module, and the working circuit further includes a programmable control circuit, and the signal of the self-checking module and the signal of the wave detecting module are transmitted to the programmable The control circuit is processed by the programmable control circuit and then transmitted to the device self-test unit, the voice unit, the flash unit and the latching circuit. The DC high-voltage live display latching device further includes a power module, and the power module provides power supply for the entire device, and the power module AC/DC: 110/220V.

In this embodiment, the DC high voltage live display blocking device utilizes the electric field coupling principle between the high voltage electric field and the sensor to perform inductive measurement outside the safety distance. The device is composed of a sensor and a display, wherein the length of the sensor is 300mm, diameter is 35mm, the installation size of the display is 300*430*150mm, and the display has 19 wiring ports: among them, 1, 2, 3 wiring ports are sensor input signal lines; 4, 5, 6 wiring ports are fault alarm input Node; 7, 8, 9 wiring ports are charged signal output nodes; 10, 11, 12, 13, 14, 15, 16, 17, 18 wiring ports are three pairs of blocking nodes; 19 wiring ports are grounded; when the measured line is charged When the 7, 8, and 9 terminals are closed, the 17 and 18 terminals are closed; when the line under test is not charged, the 10-18 three pairs of latching nodes are closed, and the indicator is externally provided with an indicator light, and the indicator light is connected to the flash unit. The indicator light is divided into a live indicator light, a working power indicator light, and an operation indicator light.

In order to function as a good alarm, the device also includes a voice alarm, the voice alarm is packaged in the display, and the voice alarm is connected to the voice unit.

The outer surface of the display is provided with a waterproof layer coated with an insulating layer, and the waterproof layer is sprayed with an insulating layer to protect against water and dust, increase safety performance and prolong life. When the display is installed outdoors, it may be external to the display. Install a rainproof box.

The specific working mode of the embodiment: the device is composed of a sensor and a display. The sensor has no direct contact with the high-voltage charged body and maintains a certain safe distance. It receives the electric field signal of the high-voltage charged body and transmits it to the display for comparison and judgment: When the device under test or the network is powered, the live indicator light is on, the operation indicator is off, and the forced lockout signal is output. When the device under test or the network is not powered, the live indicator light is off, the operation indicator green light is on, and the lockout signal is released. , can operate the device. The display has a "self-test" function. When the device is installed, it can automatically detect the function of each module of the display. If everything is normal, when the "self-test" is pressed, you can see that the live indicator flashes and the latching relay jumps. The buzzer is loud.

When the detected circuit has a positive bus and the negative bus is grounded, the probe shield of the 1 connector of the display is connected to the negative bus, and the sensor probe is installed at a safe distance below the positive bus; when the center of the positive and negative bus is grounded, the display 1 The probe shield wire of the wiring port is connected to the center point. The sensor probe is installed under the positive and negative bus bars. The installation distance is half of the standard voltage. The sensor probe is installed at the installation distance of half of the standard voltage below the positive and negative bus bars.

After the display and sensor probe are installed, the monitor will work normally when it is powered on. The DC high-voltage live display locking device can also be used together with the microcomputer anti-misoperation locking device: in cooperation with the microcomputer anti-misoperation locking computer key, the line grounding knife is equipped with a code lock, and the passive electroscope code lock is installed in the live display, taking 2A The relay node can be used. When the line is energized, the passive code lock can't take the node signal. The next time the connected knife can't operate, only when the live display has no high voltage, the passive node signal can be taken for the next step. The DC high-voltage live display locking device can also be used with the GIS primary device: when combined with the GIS combination electrical device and the electrical lock, the live display is equipped with a pair of passive blocking relay 5A nodes, when any one of the three phases is charged, In the locked state, the node is closed only when the three phases are completely dead, and the product is also disconnected when the product is not powered.

The basic principles, main features and advantages of the present invention have been shown and described above. It should be understood by those skilled in the art that the present invention is not limited by the foregoing embodiments, and that the present invention is only described in the foregoing description and the description of the present invention, without departing from the spirit and scope of the invention. Various changes and modifications are intended to be included within the scope of the invention as claimed. The scope of the invention is defined by the appended claims and their equivalents.

Claims

A DC high voltage live display locking device, comprising: a sensor and a display, wherein the display comprises a working circuit, the working circuit comprises a compensation module, an input containing module, a signal processing module, a self-test module, and a self-setting a module, a wave detecting module, wherein a lower lead of the sensor is connected to the compensation module, and is connected to the input protection module, wherein a signal of the input protection module is input to the signal processing module, and a signal input of the self-test module To the signal processing module, the signal of the self-setting module is input to the signal processing module, and the signal processed by the signal processing module is transmitted to the wave module, and the working circuit further includes a programmable control circuit. The signal of the self-test module and the signal of the wave detection module are transmitted to the programmable control circuit, processed by the programmable control circuit, and then transmitted to the device self-test unit, the voice unit, the flash unit and the latch circuit, the DC The high voltage live display latching device further includes a power module that provides power to the entire device
The DC high voltage live display blocking device according to claim 1, wherein the power module adopts AC/DC: 110/220V.
The DC high voltage live display latching device according to claim 2, wherein the display has a total of 19 wiring ports: wherein the 1, 2, and 3 wiring ports are sensor introduction signal lines; and the 4, 5, and 6 wiring ports are Fault alarm input node; 7, 8, 9 wiring ports are charged signal output nodes; 10, 11, 12, 13, 14, 15, 16, 17, 18 wiring ports are three pairs of blocking nodes; 19 wiring ports are grounded; When the test line is energized, the 7, 8, and 9 terminals are closed, and the 17 and 18 terminals are closed. When the line under test is not charged, the 10-18 pairs of latching nodes are closed.
The DC high voltage live display latching device according to claim 3, wherein an indicator light is arranged outside the display, the indicator light is connected to the flash unit, and the indicator light is divided into a live indicator light and works. Power indicator and operation indicator.
The DC high voltage live display latching device of claim 4, further comprising a voice alarm, said voice alarm being packaged in said display, said voice alarm being coupled to said voice unit.
The DC high voltage live display latching device according to any one of claims 1 to 5, characterized in that the display is provided with a casing, the casing is sprayed with a waterproof layer, and the waterproof layer is sprayed with an insulating layer.