CN108196135A - A kind of high direct voltage electrified display interlock apparatus - Google Patents

Abstract

The invention relates to the technical field of UHV power transmission equipment protection, in particular, it is a DC high-voltage live display locking device, including a sensor and a display, and a working circuit is packaged in the display, and the lower lead of the sensor is connected to the compensation module and then connected to the input protection module Connected, the signal of the input protection module is input to the signal processing module, 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 then transmitted to the wave pick-up module. The working circuit also includes a programmable control circuit, the signal of the self-inspection module and the signal of the wave detection module are transmitted to the programmable control circuit, and then transmitted to the equipment self-inspection unit, voice unit, flash unit and locking circuit after being processed by the programmable control circuit , the DC high-voltage live display locking device also includes a power supply module, and the power supply module provides power supply for the entire device.

Description

A DC high voltage live display locking device

technical field

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

Background technique

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

The existing high-voltage live display blocking devices are all high-voltage AC live display blocking devices, and the input signal is easily affected by the gradual aging of cables and changes in natural space conditions, resulting in monitoring errors, and the high-voltage live display blocking device is under the interference of the external environment. For example, in thunderstorm weather, the current of the high-voltage live display locking device will leak, which will affect 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 DC UHV substations in power systems. It monitors the high-voltage incoming lines on the DC incoming line side in real time and ensures the safe operation of power production.

Contents of the invention

The purpose of the present invention is to provide a DC high-voltage live display locking device, which can monitor the high-voltage incoming line on the DC incoming line side in real time and on-line, so as to ensure the safe operation of electric power production.

The technical scheme that the present invention adopts is as follows:

A DC high-voltage live display locking device, including a sensor and a display, a working circuit is packaged in the display, and the working circuit includes a compensation module, an input containing module, a signal processing module, a self-test module, a self-setting module, a wave detection module, and a sensor. The lower lead is connected to the compensation module and then connected to the input protection module. The signal of the input protection module is input to the signal processing module, 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 processing module The processed signal is then transmitted to the wave pickup module. The working circuit also 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 transmitted to the equipment self-control circuit after being processed by the programmable control circuit. The detection unit, the voice unit, the flash unit and the locking circuit, the DC high voltage live display locking device also includes a power module, and the power module provides power supply for the whole device.

As a further improvement of the present invention, the power supply module adopts AC/DC: 110/220V.

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

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

The further improvement of the present invention also includes a voice alarm, the voice alarm is packaged in the display, and the voice alarm is connected with the voice unit.

As a further improvement of the present invention, a casing is arranged outside the display, a waterproof layer is sprayed on the casing, and an insulating layer is sprayed on the waterproof layer.

Beneficial effects of the present invention: the present invention is a new type of inductive high-voltage live monitoring device, which does not directly contact with the charged body, and is easy to install, low in maintenance costs and long in service life; the device is advanced in design, reasonable in structure, complete in function, safe and reliable , has the functions of flashing display, sound alarm, self-test and starting the forced locking circuit, etc., and has obvious directionality, high sensitivity and reliability; the invention is suitable for DC UHV lines with DC rated voltage of 10-10000kV It is an ideal safety device to prevent electrical misoperation on DC electrical networks or equipment by reflecting live conditions.

Description of drawings

Fig. 1 is a working circuit diagram of the present invention.

Fig. 2 is a schematic diagram of the structure of the display of the present invention.

Fig. 3 is a schematic structural diagram of the sensor of the present invention.

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

Detailed ways

In order to deepen the understanding of the present invention, the present invention will be described in further detail below in conjunction with the accompanying drawings and embodiments, which are only used to explain the present invention and do not limit the protection scope of the present invention.

Embodiment: As shown in Fig. 1, Fig. 2 and Fig. 3, a DC high-voltage live display locking 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, a signal processing module, Self-inspection module, self-setting module, wave detection module, the lower lead of the sensor is connected to the compensation module and then connected to the input protection module, the signal of the input protection module is input to the signal processing module, the signal of the self-inspection module is input to the signal processing module, The signal from the self-setting module is input to the signal processing module, and the signal processed by the signal processing module is then transmitted to the wave picking module. The control circuit is processed by the programmable control circuit and then transmitted to the equipment self-inspection unit, voice unit, flash unit and locking circuit. The DC high-voltage live display locking device also includes a power module, which provides power for the entire device. The power module Use AC/DC: 110/220V.

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

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

There is a casing outside the display, and a waterproof layer is sprayed on the casing, and an insulating layer is sprayed on the waterproof layer, which plays the role of waterproof and dustproof, increases safety performance, and prolongs life. When the display is installed outdoors, it can also be installed outside the display. Install a rainproof box.

The specific working method of this embodiment: the device is composed of a sensor and a display. The sensor has no direct contact with the high-voltage charged body and keeps 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 electrified, the charging indicator light is on, the operation indicator light is off, and a mandatory blocking signal is output; when the device under test or the network is not charged, the charging indicator light is off, the operation indicator light is green, and the locking signal is released at the same time , you can perform device operations. There is a "self-test" function on the display. When the equipment is installed, it can automatically detect the functions of the various modules of the display. If everything is normal, when you press "self-test", you can see the live indicator light flickering, and the locking relay jumps. The buzzer is loud.

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

After the display and sensor probes are installed, the display can work normally when it is powered on. The DC high-voltage live display locking device can also be used in conjunction with the microcomputer anti-misoperation locking device: to cooperate with the microcomputer anti-misoperation locking computer key, the line grounding switch is installed with a coded lock, and a passive electric inspection coded lock is installed in the live display, taking 2A The relay node is fine. When the line is charged, the passive code lock cannot get the node signal, and the next step of connecting the switch knife cannot be operated. Only when the charged display has no high voltage, the passive node signal can be obtained for the next step. ; The DC high-voltage live display locking device can also be used in conjunction with GIS primary equipment: when cooperating with GIS combined electrical appliances and electrical locking, the live display is equipped with a pair of passive locking relay 5A nodes. When any one of the three phases is charged, it is In the locked state, the node is closed only when the three phases are completely de-energized, and the product is also disconnected when there is no power.

The basic principles, main features and advantages of the present invention have been shown and described above. Those skilled in the industry should understand that the present invention is not limited by the above-mentioned embodiments. What are described in the above-mentioned embodiments and the description only illustrate the principle of the present invention. Without departing from the spirit and scope of the present invention, the present invention will also have Variations and improvements are possible, which fall within the scope of the claimed invention. The protection scope of the present invention is defined by the appended claims and their equivalents.

Claims (6)

1. A DC high-voltage charged display locking device, characterized in that it includes a sensor and a display, and the display is packaged with a working circuit, and the working circuit includes a compensation module, an input containing module, a signal processing module, a self-test module, and a self-checking module. A setting module and a wave detection module, the lower lead of the sensor is connected to the compensation module and then connected to the input protection module, the signal of the input protection module is input to the signal processing module, and the self-test module The signal is input to the signal processing module, the signal from the self-setting module is input to the signal processing module, the signal processed by the signal processing module is then transmitted to the wave picking module, and the working circuit also includes a programmable control circuit, the signal of the self-inspection module and the signal of the wave detection module are transmitted to the programmable control circuit, and then transmitted to the equipment self-inspection unit, the voice unit, the flash unit and the locking circuit after being processed by the programmable control circuit, The DC high-voltage electrified display locking device also includes a power supply module, which provides power supply for the entire device. 2. The DC high voltage live display locking device according to claim 1, wherein the power supply module adopts AC/DC: 110/220V. 3. The DC high voltage live display locking device according to claim 2, characterized in that the display has 19 connection ports: wherein, connection ports 1, 2 and 3 are the sensor lead-in signal lines; connection ports 4, 5 and 6 are Port 1 is the fault alarm input node; 7, 8, and 9 are live signal output nodes; 10, 11, 12, 13, 14, 15, 16, 17, and 18 are three pairs of blocking nodes; 19 is grounded; When the line under test is electrified, the 7, 8, and 9 wiring ports are closed, and the 17, 18 wiring ports are closed; when the tested line is not electrified, the three pairs of blocking nodes 10-18 are closed. 4. The DC high-voltage live display locking 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 charged indicator lights , working power indicator light and operation indicator light. 5 . The DC high voltage live display locking device according to claim 4 , further comprising a voice alarm packaged in the display, and the voice alarm is connected to the voice unit. 6 . 6. The DC high-voltage charged display locking device according to any one of claims 1-5, wherein a housing is arranged outside the display, and a waterproof layer is sprayed on the housing, and an insulating layer is sprayed on the waterproof layer. Floor.