CN116047280A

CN116047280A - Intelligent gas density relay device

Info

Publication number: CN116047280A
Application number: CN202210259738.4A
Authority: CN
Inventors: 季严松; 袁帅; 毕建刚; 王承玉; 于浩; 弓艳朋; 许渊; 杜非; 是艳杰; 王广真; 付德慧; 杨圆
Original assignee: China Electric Power Research Institute Co Ltd CEPRI
Current assignee: China Electric Power Research Institute Co Ltd CEPRI
Priority date: 2022-03-16
Filing date: 2022-03-16
Publication date: 2023-05-02

Abstract

The invention discloses an intelligent gas density relay device, which comprises: the gas relay body is used for monitoring the gas density of the target electrical equipment and outputting an alarm and/or locking contact signal to external primary side equipment when the monitored gas density exceeds a preset gas density range; a relay connector for transmitting gas in the target electrical device to an intelligent gas density relay device; the sensor measuring unit is used for acquiring pressure data and temperature data; the wiring fault diagnosis unit is used for diagnosing the wiring state of the alarm contact and/or the locking contact of the gas density relay device, and sending an abnormal signal to the intelligent control unit when the wiring state is abnormal; the intelligent control unit is used for acquiring a gas density value according to the pressure data and the temperature data so as to monitor the gas density of the target electrical equipment; and the device is used for outputting junction wiring fault information to external equipment according to the abnormal signal.

Description

Intelligent gas density relay device

Technical Field

The invention relates to the technical field of electric power, and in particular relates to an intelligent gas density relay device.

Background

SF6 switching equipment has been widely used and reliable operation thereof has become one of the important guarantees for stable power supply of power systems. SF6 density relay is an important device installed on SF6 switch to monitor gas density change, and ensure switch insulation performance. If the gas density is reduced to a corresponding threshold value, an alarm or lock is generated to prevent a severe explosion accident from occurring during the switching operation. The quality of the density relay is therefore directly related to whether the switch can operate normally.

The periodic inspection or diagnosis of the SF6 gas density relay on the SF6 electrical equipment is a necessary measure for preventing the accident and guaranteeing the safe and reliable operation of the SF6 electrical equipment. Therefore, the existing gas density relay is very necessary to be innovated and modified, so that the gas density relay can automatically complete an on-line diagnosis function, further complete periodic diagnosis work of the mechanical density relay, and no maintenance personnel is required to go to the site.

Disclosure of Invention

The invention provides an intelligent gas density relay device, which aims to solve the problem of how to realize on-line monitoring of gas density.

In order to solve the above problems, according to an aspect of the present invention, there is provided an intelligent gas density relay apparatus comprising: the gas density relay comprises a gas density relay body arranged in a first space in a relay shell, and a relay connector, a multi-way connector, a sensor measuring unit, an intelligent control unit and at least one wiring fault diagnosis unit which are arranged in a second space in the relay shell, wherein the first space and the second space are communicated through the multi-way connector; wherein,

The gas relay body is connected with target electrical equipment through the relay connector and is used for monitoring the gas density of the target electrical equipment and outputting an alarm and/or locking contact signal to external primary side equipment when the monitored gas density exceeds a preset gas density range;

the relay connector is arranged on the relay shell, connected with the target electrical equipment and communicated with the multi-way connector and used for transmitting gas in the target electrical equipment to the intelligent gas density relay device;

the sensor measuring unit is connected with the intelligent control unit through the multi-way joint and is used for collecting pressure and temperature and acquiring pressure data and temperature data;

each wiring fault diagnosis unit in the at least one wiring fault diagnosis unit is connected with the intelligent control unit and is used for diagnosing the wiring state of the alarm contact and/or the locking contact of the gas density relay device and sending an abnormal signal to the intelligent control unit when the wiring state is determined to be abnormal;

the intelligent control unit is used for acquiring a gas density value according to the pressure data and the temperature data so as to monitor the gas density of the target electrical equipment; and the device is used for outputting junction wiring fault information to external equipment according to the abnormal signal.

Preferably, wherein the gas density relay body comprises: the device comprises an air bag, a sealing shell, a first corrugated pipe, a second corrugated pipe, a plurality of micro switches and a signal adjusting mechanism;

the first opening end of the first corrugated pipe is fixed on one wall of the sealing shell in a sealing way, and the second opening end of the first corrugated pipe is connected with the first sealing element in a sealing way; an inner wall of the first bellows, the first seal, one wall of the seal housing together define a first sealed cavity; the first sealed cavity is communicated with insulating gas in the gas insulating equipment; the first opening end of the second corrugated pipe is in sealing connection with the first sealing element, the second opening end of the second corrugated pipe is in sealing connection with the second sealing element, and the outer wall of the first corrugated pipe, the first sealing element, the outer wall of the second corrugated pipe, the second sealing element and the inner wall of the sealing shell jointly define a second sealing cavity, and the second sealing cavity is filled with compensation gas to form a temperature compensation element; the signal adjusting mechanism is connected with the first sealing piece, and the micro switch is arranged corresponding to the signal adjusting mechanism.

Preferably, wherein the signal conditioning mechanism comprises: the device comprises an adjusting screw, an adjusting rod, a disc and a fixing nut;

the adjusting screw is arranged on the disc, and the alarm and locking contact action value of the gas density relay is set by adjusting the adjusting screw; when gas leakage occurs, the gas pressure of the first sealing cavity is reduced, the pressure difference between the pressure of the compensating gas filled in the second sealing cavity and the gas pressure of the first sealing cavity is reduced, the signal adjusting mechanism moves downwards, and when the signal adjusting mechanism reaches a preset position, the adjusting screw triggers the corresponding micro switch to send out a corresponding alarm contact or locking contact signal.

Preferably, wherein the sensor measurement unit comprises: at least one pair of pressure and temperature sensors; the intelligent control unit is used for automatically converting the pressure data acquired by the pressure sensor and the temperature data acquired by the temperature sensor into a gas density value corresponding to a preset temperature based on gas pressure-temperature characteristics, and completing on-line monitoring of the gas density of the target electrical equipment by the gas relay device.

Preferably, the intelligent control unit is further configured to: when the sensor measuring unit comprises at least two pairs of pressure sensors and temperature sensors, the working state of the intelligent gas density relay device is determined, and when the working state is abnormal, abnormal working state alarming information is output;

The intelligent control unit compares the acquired first pressure data with the second pressure data to acquire a first comparison result, and determines the working state of the intelligent gas density relay device according to the first comparison result;

comparing the acquired first temperature data with second temperature data to acquire a second comparison result, and determining the working state of the intelligent gas density relay device according to the second comparison result; and/or

And comparing the acquired first gas density value with the second gas density value, acquiring a third comparison result, and determining the working state of the intelligent gas density relay device according to the third comparison result.

Preferably, the intelligent control unit automatically converts the acquired pressure data and temperature data into a gas density value corresponding to a preset temperature based on the gas pressure-temperature characteristic.

Preferably, each of the wiring fault diagnosis units includes: the first resistor R6, the rectifier bridge K, the second resistor R1, the third resistor R3, the fourth resistor R7, the fifth resistor R0, the field effect transistor Q, the optocoupler U, the first capacitor C3, the second capacitor C1 and the third capacitor C2; one end of the first resistor R6 and one end of the fifth resistor R0 are respectively connected with an alarm or locking joint PJ; the output end of the optical coupler U is connected with the intelligent control unit; when the wiring of the alarm contact or the locking contact is correct, the field effect transistor Q is conducted, so that the optocoupler U is driven, the optocoupler U outputs a logic low level, and the intelligent control unit acquires the logic low level in real time; if the connection of the alarm contact or the locking contact is broken, no power is connected and/or the connection is incorrect, the optical coupler U outputs a logic high level, the intelligent control unit acquires the logic high level in real time, and the intelligent control unit outputs and/or uploads contact connection fault information.

Preferably, each of the junction wiring fault diagnosis units further includes: a TVS tube D1 and a voltage stabilizing tube D2; the TVS tube is connected to the output end of the rectifier bridge K and is used for absorbing transient high voltage input by an alarm or locking contact port caused by external reasons; the voltage stabilizing tube D2 is connected in parallel with two ends of the third resistor R3 and is used for ensuring that the driving voltage of the field effect tube Q is within a safe range.

Preferably, the device further comprises a micro control valve, a micro pressure controller and a contact signal sampling unit; wherein,

one end of the micro control valve is provided with an interface communicated with a relay connector, and the other end of the micro control valve is communicated with the gas density relay body; the closing micro control valve is used for realizing the separation or conduction of the gas density relay and the electrical equipment on the gas path according to the control command of the intelligent control unit;

the gas circuit of the miniature pressure controller is communicated with the gas density relay body; the miniature pressure controller is used for adjusting the pressure rise and fall of the gas density relay body so that the gas density relay body generates contact signal action;

the contact signal sampling unit is directly or indirectly connected with the alarm contact and/or the locking contact of the gas density relay body and is used for sampling contact signals of the alarm node and/or the locking contact of the gas density relay body and transmitting the contact signals to the intelligent control unit, so that the intelligent control unit detects contact signal action values and/or return values of the gas density relay body according to the contact signal action or switching of the gas density relay body, and the on-line diagnosis of the gas density relay body is completed.

Preferably, the contact signal sampling unit is relatively isolated from the gas density relay alarm or locking contact signal in a circuit when in a non-verification state; when in a verification state, the contact signal control loop of the density relay can be cut off, so that the contact action signal of the gas density relay can not be uploaded during verification, and the safe operation of a power grid can not be affected.

Preferably, the micro control valve is a solenoid valve, and is sealed in a cavity or a housing.

Preferably, the intelligent control unit is further configured to:

calculating a temperature decrease value DeltaT and a pressure decrease value DeltaP according to the acquired temperature data and pressure data, and sending out a liquefaction notification signal, a time for notifying occurrence of gas liquefaction and/or a duration for notifying occurrence of gas liquefaction when the I delta P/DeltaTI is not less than a first preset threshold value; or (b)

When the temperature is higher than a set value Ts, K1 delta P/[ delta ] T is calculated, and when the temperature is lower than the set value Ts, if meeting delta P/[ delta ] T is determined to be equal to or greater than M K1 according to the current pressure data and the temperature data, wherein M is a preset coefficient, the intelligent control unit sends out a liquefaction notification signal, a notification time for gas liquefaction and/or a notification duration time for gas liquefaction.

Preferably, the intelligent control unit is further configured to: automatically distributing gas relay communication address codes, and sending addressing broadcast to each gas relay device by a background terminal; after receiving the addressing broadcast, the gas relay device without the equipment address judges whether the input level of the current self arrangement sequence identification signal is in a suspended state or a preset level state; if yes, the gas relay device identifies the address in the addressing broadcast as the address of the self equipment; if not, the gas relay waits for the background to send the addressing broadcast of the next address; or (b)

At the same time, the gas relay devices are all used as Modbus slave stations, the address range is 1-247, the gas relay devices respond to requests initiated by the master station and must accept write commands in a broadcasting mode, and the address 0 is used as a broadcasting address.

Preferably, wherein the apparatus further comprises:

the state indicator lamp is connected with the intelligent control unit and used for indicating the working state of the gas density relay;

the micro water sensor is used for monitoring the gas micro water value on line;

the nitrogen content sensor is arranged at the bottom of the relay shell, is connected with the intelligent control unit and is used for diagnosing the leakage condition of SF6 gas, and when SF6 gas leakage occurs in the gas density relay, the intelligent control unit outputs and/or uploads SF6 gas leakage information;

The wireless communication unit is connected with the intelligent control unit and is used for realizing the link with the portable wireless reader so that the portable wireless reader can read the data and/or information monitored by the intelligent gas density relay device;

the clock is connected with the intelligent control unit and is used for enabling the intelligent control unit to control the display equipment to enter a non-display state at night according to the clock;

the photoelectric sensor is connected with the intelligent control unit so that the intelligent control unit can control the display equipment to enter a non-display state at night according to the photoelectric sensor;

the miniature alarm bell is connected with the intelligent control unit and is used for controlling the miniature alarm bell to send an alarm signal when the intelligent control unit monitors that the pressure data and/or the temperature data in the air chamber of the electrical equipment are/is higher than the corresponding preset pressure threshold value or temperature threshold value;

the communication module is connected with the intelligent control unit and is used for uploading the data or information monitored by the intelligent control unit to the background monitoring terminal or the target equipment.

Preferably, wherein the apparatus further comprises:

a display device, comprising: the display device is connected with the intelligent control unit and is used for displaying gas density values, temperature data, pressure data and working state instructions; the display device is arranged on the relay shell of the intelligent gas density relay device or is arranged at a place outside the relay shell of the gas density relay; the display device is connected with the intelligent control unit in a wireless or wired mode.

Preferably, wherein the apparatus further comprises:

and the heat insulation piece is arranged between the first space and the second space formed by the relay shell and is used for heat insulation so as to reduce the influence of the intelligent control unit on the monitoring precision of the density relay body.

The invention provides an intelligent gas density relay device, which comprises: the device can realize the real-time monitoring of the gas density of the gas-insulated electrical equipment, realize the monitoring of the gas density of the electrical equipment without manual maintenance, improve the reliability of a power grid, improve the efficiency and reduce the cost; the device can be applied to a gas density monitoring system based on the intelligent ubiquitous electric power internet of things, can realize the mutual verification of a mechanical part and an electronic part of the gas density relay, realize maintenance-free or less maintenance, improve the efficiency, reduce the operation and maintenance cost, improve the reliability of a power grid and ensure the safe operation of the power grid.

Drawings

Exemplary embodiments of the present invention may be more completely understood in consideration of the following drawings:

fig. 1 is a schematic structural view of an intelligent gas density relay apparatus 100 according to an embodiment of the present invention;

FIG. 2 is an exemplary diagram of an intelligent gas density relay apparatus in accordance with an embodiment of the present invention;

FIG. 3 is a control circuit of an intelligent gas density relay apparatus in accordance with an embodiment of the present invention;

fig. 4 is an address assignment schematic diagram of automatic assignment of relay communication address codes according to an embodiment of the present invention.

Detailed Description

The exemplary embodiments of the present invention will now be described with reference to the accompanying drawings, however, the present invention may be embodied in many different forms and is not limited to the examples described herein, which are provided to fully and completely disclose the present invention and fully convey the scope of the invention to those skilled in the art. The terminology used in the exemplary embodiments illustrated in the accompanying drawings is not intended to be limiting of the invention. In the drawings, like elements/components are referred to by like reference numerals.

Unless otherwise indicated, terms (including technical and scientific terms) used herein have the same meaning as commonly understood by one of ordinary skill in the art. In addition, it will be understood that terms defined in commonly used dictionaries should be interpreted as having a meaning that is consistent with their meaning in the context of the relevant art and will not be interpreted in an idealized or overly formal sense.

Fig. 1 is a schematic structural view of an intelligent gas density relay apparatus 100 according to an embodiment of the present invention. As shown in fig. 1, the intelligent gas density relay device provided by the embodiment of the invention can realize the real-time monitoring of the gas density of the gas insulation electrical equipment, realize the monitoring of the gas density of the electrical equipment without manual maintenance, improve the reliability of a power grid, improve the efficiency and reduce the cost; the device can be applied to a gas density monitoring system based on the intelligent ubiquitous electric power internet of things, can realize the mutual verification of a mechanical part and an electronic part of the gas density relay, realize maintenance-free or less maintenance, improve the efficiency, reduce the operation and maintenance cost, improve the reliability of a power grid and ensure the safe operation of the power grid. The intelligent gas density relay device 100 provided in the embodiment of the invention comprises: the gas density relay comprises a gas density relay body 101 arranged in a first space in a relay shell, and a relay joint 102, a multi-way joint 103, a sensor measuring unit 104, an intelligent control unit 106 and at least one wiring fault diagnosis unit 105 arranged in a second space in the relay shell, wherein the first space and the second space are communicated with each other through the multi-way joint 103.

Preferably, the gas relay body 101 is connected to a target electrical device through the relay connector, and is configured to monitor a gas density of the target electrical device, and output an alarm and/or locking contact signal to an external primary side device when the monitored gas density exceeds a preset gas density range.

Preferably, the relay connector 102 is disposed on the relay housing, connected to the target electrical device, and in communication with the multi-way connector 103, for transmitting the gas in the target electrical device to the intelligent gas density relay device.

Preferably, the sensor measurement unit 104 is connected to the intelligent control unit through the multi-way connector, and is used for collecting pressure and temperature, and acquiring pressure data and temperature data.

Preferably, each of the at least one wiring fault diagnosis units 105 is connected to the intelligent control unit, and is configured to diagnose a wiring state of the alarm contact and/or the latch contact of the gas density relay device, and send an abnormality signal to the intelligent control unit when it is determined that the wiring state is abnormal.

Preferably, each of the wiring fault diagnosis units 105 includes: the first resistor R6, the rectifier bridge K, the second resistor R1, the third resistor R3, the fourth resistor R7, the fifth resistor R0, the field effect transistor Q, the optocoupler U, the first capacitor C3, the second capacitor C1 and the third capacitor C2; one end of the first resistor R6 and one end of the fifth resistor R0 are respectively connected with an alarm or locking joint PJ; the output end of the optical coupler U is connected with the intelligent control unit; when the wiring of the alarm contact or the locking contact is correct, the field effect transistor Q is conducted, so that the optocoupler U is driven, the optocoupler U outputs a logic low level, and the intelligent control unit acquires the logic low level in real time; if the connection of the alarm contact or the locking contact is broken, no power is connected and/or the connection is incorrect, the optical coupler U outputs a logic high level, the intelligent control unit acquires the logic high level in real time, and the intelligent control unit outputs and/or uploads contact connection fault information.

Preferably, each of the junction wiring fault diagnosis units 105 further includes: a TVS tube D1 and a voltage stabilizing tube D2; the TVS tube is connected to the output end of the rectifier bridge K and is used for absorbing transient high voltage input by an alarm or locking contact port caused by external reasons; the voltage stabilizing tube D2 is connected in parallel with two ends of the third resistor R3 and is used for ensuring that the driving voltage of the field effect tube Q is within a safe range.

Preferably, the intelligent control unit 106 is configured to obtain a gas density value according to the pressure data and the temperature data, so as to monitor the gas density of the target electrical device; and the device is used for outputting junction wiring fault information to external equipment according to the abnormal signal.

Preferably, the intelligent control unit 106 is further configured to: when the sensor measuring unit comprises at least two pairs of pressure sensors and temperature sensors, the working state of the intelligent gas density relay device is determined, and when the working state is abnormal, abnormal working state alarming information is output;

Preferably, the intelligent control unit 106 automatically converts the acquired pressure data and temperature data into a gas density value corresponding to a preset temperature based on the gas pressure-temperature characteristic.

Preferably, the apparatus further comprises: the micro control valve, the micro pressure controller and the contact signal sampling unit; wherein,

Preferably, the intelligent control unit is further configured to:

Preferably, wherein the apparatus further comprises:

The intelligent gas density relay for the high-voltage electrical equipment can be used for monitoring the gas density of the electrical equipment with gas insulation or arc extinction, meanwhile, the on-line diagnosis of the gas density relay is finished, and coded data and/or information is uploaded to an internet terminal through a communication module so that the internet terminal can safely manage the current operating state of the gas density relay and the electrical equipment, the efficiency is improved, the operating maintenance cost is reduced, and the safe operation of a power grid is ensured.

Fig. 2 is an exemplary diagram of an intelligent gas density relay device according to an embodiment of the present invention. As shown in fig. 2, the intelligent gas density relay device provided in the embodiment of the present invention includes: relay case 14, gas density relay body 8, relay connector 6, multi-way connector 7, first pressure sensor 1A, second pressure sensor 1B, first temperature sensor 2A, second temperature sensor 2B, data display 11, at least one wiring fault diagnosis unit 9, intelligent control unit 5, micro control valve 3, micro pressure controller 4, contact signal sampling unit 10, status indicator lamp 12, wireless communication unit 13, nitrogen content sensor 15, clock 16, photoelectric sensor 17, heater 18, and heat insulator 19.

The left side part is a first space, the right side part is a second space, and the middle of the shell of the first space and the shell of the second space are isolated by a heat insulating piece; the relay connector 6, the multi-way connector 7, the first pressure sensor 1A, the second pressure sensor 1B, the first temperature sensor 2A, the second temperature sensor 2B, the data display 11, the at least one wiring fault diagnosis unit 9, the intelligent control unit 5, the miniature pressure controller 4, the contact signal sampling unit 10, the status indicator lamp 12, the clock 16, the photoelectric sensor 17 and the heater 18 are all located in a first space and arranged in a relay shell 1401, the gas density relay body 8, the miniature control valve 3 and the nitrogen content sensor 15 are all located in a second space and arranged in a relay shell 1402, and the wireless communication unit 13 is arranged outside the shell; the multi-way joint 7 is communicated with the relay joint 6; the gas density relay body 8, the first pressure sensor 1A, the second pressure sensor 1B, the first temperature sensor 2A and the second temperature sensor 2B are respectively arranged on the multi-way joint 7; the relay connector 6 is provided on the relay housing.

The gas relay body 8 is configured to monitor a gas density of the target electrical device, and output an alarm and/or a locking contact signal to an external primary side device when the monitored gas density exceeds a preset gas density range.

The gas density relay body 8 mainly includes a gas bladder 801, a seal housing 802, a first bellows 803, a second bellows 804, a plurality of micro switches 805, and a signal conditioning mechanism 806. Specifically, the air bag 801 of the intelligent indication remote transmission type gas density relay is mainly composed of a corrugated pipe and a sealing member, the gas density relay body 8 mainly comprises, wherein a first opening end of the first corrugated pipe 803 is sealed and fixed on one wall of the sealing shell 802, and a second opening end of the first corrugated pipe 803 is connected with the first sealing member 807 in a sealing manner; the inner wall of the first bellows 803, the first seal 807, one wall of the seal housing 802 together define a first seal cavity 808; the first sealed cavity 808 is in communication with the insulating gas in the gas-insulated device; the first opening end of the second bellows 804 is in sealing connection with the first sealing member 807, the second opening end of the second bellows 804 is in sealing connection with the second sealing member 809, and the outer wall of the first bellows 803, the first sealing member 807, the outer wall of the second bellows 804, the second sealing member 809 and the inner wall of the sealing housing 802 together define a second sealing cavity 810, and the second sealing cavity 810 is filled with compensation gas to form a temperature compensation element; the signal adjustment mechanism 806 is connected to the first sealing member 807, and the plurality of micro switches 805 are disposed corresponding to the signal adjustment mechanism 806. The signal adjusting mechanism 806 mainly includes an adjusting screw 8061, an adjusting rod 8063, a disk 8062, and a fixing nut 8064, wherein the adjusting screw 8061 is disposed on the disk 8062. The alarm and lockout contact actuation values of the gas density relay may be set by adjusting the set screw 8061. When the air leakage occurs, the air pressure of the first sealing cavity 808 is reduced, the pressure difference between the pressure of the compensating air filled in the second sealing cavity 801 and the air pressure of the first sealing cavity 808 is reduced, so that the signal adjusting mechanism 806 moves downwards, and to a certain extent, the adjusting screw 8061 triggers the corresponding micro switch 805 to send out a corresponding alarm contact or locking contact signal.

As shown in fig. 2, the first pressure sensor 1A, the second pressure sensor 1B, the first temperature sensor 2A, the second temperature sensor 2B, the data display 11, and the plurality of wiring fault diagnosis units 9 are respectively connected with the intelligent control unit 5. The intelligent control unit 5 obtains the gas density value P1 and the temperature value T1 acquired by the first pressure sensor 1A and the first temperature sensor 2A, and automatically converts the gas density value P1 into a corresponding gas density value P1 at 20 ℃ according to the gas pressure-temperature characteristics ₂₀ Completing the on-line monitoring of the gas density of the electrical equipment monitored by the gas relay; or the intelligent control unit acquires the gas density value P2 and the temperature value T2 acquired by the second pressure sensor 1B and the second temperature sensor 2B, and automatically converts the gas density value P2 into the corresponding gas density value P2 at 20 ℃ according to the gas pressure-temperature characteristics ₂₀ Completing the on-line monitoring of the gas density of the electrical equipment monitored by the gas relay; the communication module monitors data or information including, but not limited to, P1 ₂₀ 、P2 ₂₀ And the running condition information is alternately uploaded to a background monitoring terminal or target equipment.

The working principle or working process of the gas density relay on-line self-diagnosis is as follows: the intelligent control unit 5 performs comparison diagnosis on a first gas density value P1 acquired by the first pressure sensor 1A and a second gas density value P2 acquired by the second pressure sensor 1B under the same gas pressure. The intelligent control unit 5 compares the first gas density value P1 with the second gas density value P2 to obtain an error value |P1-P2|; if the error value |p1-p2| exceeds the preset threshold, the intelligent control unit 5 outputs and/or uploads the abnormal alarm information, which indicates that the operation condition of the first pressure sensor or the second pressure sensor of the gas density relay is problematic at this time, and the operation and maintenance personnel is required to go to the site for processing. If the error value |P1-P2| does not exceed the preset threshold value, the first pressure sensor or the first pressure sensor of the gas density relay is indicated within the preset threshold value The two pressure sensors are normal in operation. And/or, the intelligent control unit 5 performs comparison diagnosis on the first temperature value T1 acquired by the first temperature sensor 2A and the second temperature value T2 acquired by the second temperature sensor 2B at the same gas temperature. The intelligent control unit 5 compares the first temperature value T1 with the second temperature value T2 to obtain an error value |T1-T2|; if the error value |t1-t2| exceeds the preset threshold, the intelligent control unit 5 outputs and/or uploads an abnormal alarm message, which indicates that the operation condition of the first temperature sensor or the second temperature sensor of the gas density relay is problematic at this time, and an operation and maintenance person is required to go to the site for processing. If the error value |T1-T2| does not exceed the preset threshold, the operation condition of the first temperature sensor or the second temperature sensor of the gas density relay is normal within the preset threshold range. Alternatively, the intelligent control unit 5 calculates a first density value P1 obtained by the first pressure sensor 1A and the first temperature sensor 2A at the same gas density ₂₀ And a second density value P2 obtained by the second pressure sensor 1B and the second temperature sensor 2B ₂₀ Performing comparison diagnosis; the intelligent control unit 5 controls the first density value P1 ₂₀ And a second density value P2 ₂₀ Comparing to obtain error value |P1 ₂₀ -P2 ₂₀ I (I); if the error value |P1 ₂₀ -P2 ₂₀ The intelligent control unit 5 outputs and/or uploads abnormal alarm information when the I exceeds the preset threshold value, which indicates that the running condition of the pressure sensor or the temperature sensor of the gas density relay is problematic at the moment, and operation and maintenance personnel are required to go to the site for processing. And if the error value |P1 ₂₀ -P2 ₂₀ And I does not exceed the preset threshold, and the operation conditions of all the pressure sensors and the temperature sensors of the gas density relay are normal at the moment within the preset threshold range.

The data display 11 mainly comprises liquid crystal or nixie tubes, and the data display 11 is connected with the intelligent control unit 5; the data display 11 can display on site including, but not limited to, gas density values, temperature values, gas density values, operating status indications. The intelligent control unit is provided with a communication module, and the communication module uploads the monitored data and/or information to the background monitoring terminal. The gas density relay further comprises a wireless communication unit 13, the wireless communication unit 13 is connected with the intelligent control unit 5, and the wireless communication unit 5 can be connected with a portable wireless reader to enable the portable wireless reader to read data and/or information monitored by the gas density relay. The intelligent control unit 5 further comprises a status indicator lamp 12; the status indicator light 12 is connected to the intelligent control unit 5 to indicate the working status of the intelligent control unit 12.

In the embodiment of the present invention, each wiring fault diagnosis unit 9 is configured to diagnose the wiring state of the alarm contact and/or the latch contact of the gas density relay. If the connection state of the alarm contact and/or the locking contact of the gas density relay is abnormal, the connection fault diagnosis unit 9 outputs a signal to the intelligent control unit, and the intelligent control unit 5 outputs and/or uploads connection fault information of the contact.

As shown in fig. 3, the junction connection fault diagnosis unit 9 mainly includes a first resistor R6 (10 mΩ), a rectifier bridge K, a second resistor R1 (1 mΩ), a third resistor R3 (1 mΩ), a fourth resistor R7 (1 mΩ), a fifth resistor R0 (10 mΩ), a field-effect transistor Q, an optocoupler U, a first capacitor C3, a second capacitor C1, and a third capacitor C2, where the first resistor R6 (10 mΩ), the rectifier bridge K, the second resistor R1 (1 mΩ), the third resistor R3 (1 mΩ), the fourth resistor R7 (1 mΩ), the fifth resistor R0 (10 mΩ), the field-effect transistor Q, the optocoupler U, the first capacitor C3, the second capacitor C1, and the third capacitor C2 form a loop; wherein one end of the first resistor R6 (10 MΩ) and one end of the fifth resistor R0 (10 MΩ) are respectively connected with the alarm or locking contact P _J Is connected with each other; the output end of the optical coupler U is connected with the intelligent control unit; when the alarm or locking contact is correctly wired, the voltage (about 4.7V) at two ends of the third resistor R3 can be obtained according to the resistor voltage division principle, so that the field effect transistor Q is conducted, the optocoupler U is driven to output a logic low level, and the intelligent control unit acquires the logic low level in real time; conversely, if the alarm or locking contact is disconnected, or no power is connected, or the connection is incorrect, the optical coupler U outputs logic high level, and the logic high level is outputted by The intelligent control unit acquires the logic high level in real time, and the intelligent control unit outputs and/or uploads junction wiring fault information. The junction wiring fault diagnosis unit 9 further comprises a TVS tube D1 and a voltage stabilizing tube D2, wherein the TVS tube is connected to the output end of the rectifier bridge K and has the main function of absorbing transient high voltage input by an alarm or locking junction port caused by external reasons; the voltage stabilizing tube D2 is connected in parallel with two ends of the third resistor R3, and the voltage stabilizing tube D2 is used for ensuring that the driving voltage of the field effect tube Q is within a safe range. The circuit is added with a D1TVS tube to absorb transient high voltage input by a contact port due to external reasons, and a D2 (5.6V) voltage stabilizing tube to ensure that the driving voltage of the Q field effect tube is within a safe range.

In the invention, in order to improve more diagnostic functions of the intelligent registration remote-transmission type gas density relay, the gas density relay further comprises: a micro control valve 3, a micro pressure controller 4 and a contact signal sampling unit 10. Wherein, one end of the micro control valve 3 is provided with an interface communicated with the relay connector 6, and the other end of the micro control valve 3 is communicated with the gas density relay body 8; the gas path of the micro pressure controller 4 is communicated with the gas density relay body 8. The micro pressure controller 4 is configured to adjust the pressure rise and fall of the gas density relay body, so that the gas density relay body 8 generates a contact signal action. The contact signal sampling unit 10 is directly or indirectly connected with the alarm/lock contact of the gas density relay body 8, and is configured to sample the alarm/lock contact signal of the gas density relay body 8. The intelligent control unit 5 closes the micro control valve 3, so that the gas density relay is separated from the electrical equipment on the gas path; the micro pressure controller 4 is used for adjusting the gas pressure to rise and fall, so that the gas density relay generates an alarm and/or locks a contact signal action, the contact signal action is transmitted to the intelligent control unit 5 through the contact signal sampling unit, and the intelligent control unit 5 acquires the gas density collected by the first pressure sensor 1A and the first temperature sensor 2A when the contact signal action or switching occurs in the gas density relay body 8 The value and the temperature value are converted into a gas density value corresponding to 20 ℃ according to the gas pressure-temperature characteristic, namely the gas density value, and the contact signal (alarm or locking contact) action value P of the gas density relay body is detected _1J20 And/or returning a value to complete the on-line diagnosis of the gas density relay body; or, the intelligent control unit 5 obtains the gas density value and the temperature value collected by the second pressure sensor 1B and the second temperature sensor 2B when the contact signal action or switching occurs in the gas density relay body, converts the gas density value and the temperature value into the gas density value corresponding to 20 ℃ according to the gas pressure-temperature characteristic, namely the gas density value, and detects the contact signal (alarm or locking contact) action value P of the gas density relay body _2J20 And/or returning a value to complete the on-line diagnosis of the gas density relay body. The contact signal sampling unit 10 is relatively isolated from the gas density relay alarm or locking contact signal in the circuit in the non-checking state. When in a verification state, the contact signal control loop of the density relay can be cut off, so that the contact action signal of the gas density relay can not be uploaded during verification, and the safe operation of a power grid can not be affected. The micro control valve 3 is an electromagnetic valve, and is sealed in a cavity or a shell, so that the sealing performance of the micro control valve is further improved. A contact signal sampling unit 10, the contact signal sampling unit 10 being directly or indirectly connected to the alarm/lock contact of the gas density relay body 8 and configured to sample the alarm/lock contact P of the gas density relay body 8 _J A signal; the working process is as follows: the intelligent control unit 5 closes the micro control valve 3, so that the gas density relay body 8 is separated from the electrical equipment on the gas path; the miniature control valve 3 is an electric miniature control valve, and the miniature control valve 3 is sealed in a cavity or a shell, so that the sealing performance of the miniature control valve is further improved. The micro pressure controller 4 regulates the gas pressure to rise and fall so that the gas density relay body 8 generates an alarm and/or locks the contact P _J Signal action, contact P _J The signal motion is transmitted to the intelligent control unit 5 through the contact signal sampling unit 10, and the intelligent control unit 5 acquires the gasContact P is generated in bulk density relay body 8 _J The gas density value P and the temperature value T acquired by the pressure sensor 1 and the temperature sensor 2 during signal operation or switching are converted into the gas density value corresponding to 20 ℃ according to the gas pressure-temperature characteristic, namely the gas density value P ₂₀ Detecting the contact signal (alarm or locking contact) action value P of the gas density relay body 8 _J20 And/or return values, completing the on-line diagnostics of the gas density relay body 8. The micro pressure controller 4 is a closed air chamber 401, a semiconductor 402 is arranged outside or inside the closed air chamber 401, the micro pressure controller 4 is further provided with a heat preservation member 403, and the heat preservation member 403 is arranged outside the closed air chamber 401, so that the working efficiency is improved. The intelligent control unit 5 controls the refrigerating or heating operation mode of the semiconductor 402, so that the temperature of the gas in the closed air chamber 401 is changed, and the lifting of the gas pressure is further completed. The contact signal sampling unit 10 is relatively isolated from the alarm or locking contact signal of the gas density relay body 8 in the circuit in the non-checking state. When in a verification state, the contact signal control loop of the density relay body 8 can be cut off, so that the contact action signal of the gas density relay can not be uploaded during verification, and the safe operation of a power grid can not be affected. The contact signal sampling unit 10 mainly completes the contact signal sampling of the gas density relay body 8. I.e. the basic requirements or functions of the contact signal sampling unit 10 are: 1. the safety operation of the electrical equipment is not affected during verification. When the gas density relay body 8 contacts signals act during verification, the safe operation of the electrical equipment is not affected; 2. the gas density relay body 8 contact signal control loop does not influence the performance of the relay, particularly the performance of the intelligent control unit, and the relay is not damaged or the testing work is not influenced.

The specific working principle of the intelligent gas density relay is as follows: the intelligent control unit 5 of the relay monitors the electrical equipment according to the pressure sensor 1 and the temperature sensor 2The gas pressure P and the temperature T of the gas to obtain the corresponding pressure value P of 20 DEG C ₂₀ (i.e., gas density values). In the case of permitting diagnostic verification, i.e. at this time if the gas density value P ₂₀ The safety diagnosis check density value P is not less than the set value _S The method comprises the steps of carrying out a first treatment on the surface of the The relay sends out an instruction, namely, the semiconductor 402 of the micro pressure controller 4 is put into a heating working mode through the intelligent control unit 5, and when the temperature value of the temperature controller of the micro pressure controller 4 reaches a set value, the relay sends out an instruction, namely, the micro control valve 3 is closed through the intelligent control unit 5, so that the gas density relay body 8 is separated from electrical equipment on a gas path. As shown in fig. 3, the relay then issues an instruction to disconnect the control loop of the gas density relay body 8 through the intelligent control unit 5, that is, the contacts JK11 and JK12 of the electromagnetic relay JK1 of the contact signal sampling unit 10 are disconnected, so that the safety operation of the electrical equipment is not affected when the gas density relay body 8 is checked on line, and an alarm signal is not sent out by mistake or the control loop is blocked when the gas density relay body 8 is checked. Because the relay has already performed the gas density value P before starting the verification diagnosis ₂₀ The set security check density value P is not less than _S Because the gas of the electrical equipment is within safe operating range, moreover, gas leakage is a slow process and is safe when verified. At the same time, the contacts JK21 and JK22 of the electromagnetic relay JK2 are closed, so that the contact P of the gas density relay body 8 _J Is connected with the intelligent control unit 5. Then immediately turning off the semiconductor 402 of the micro pressure controller 4, stopping the heating operation mode of the semiconductor 402, or entering the cooling operation mode, the temperature of the gas in the closed air chamber 401 of the micro pressure controller 4 is reduced, the pressure of the gas in the closed air chamber 401 is gradually reduced, the density relay body 8 generates alarm and/or locking contact points to act respectively, the intelligent control unit 5 detects the alarm and/or locking contact point signals through the contact points JK21 and JK22, the intelligent control unit 5 immediately acquires the gas density value P and the temperature value T acquired by the pressure sensor 1 and the temperature sensor 2, and converts the gas density value P and the temperature value T into the gas density value corresponding to 20 ℃ according to the gas pressure-temperature characteristics, namely the gas density value P ₂₀ Detecting the density of gasContact signal (alarm or lock contact) operation value P of relay body 8 _J20 And completing the on-line checking and diagnosing of the action value of the gas density relay body 8. Then, the semiconductor 402 connected with the micro pressure controller 4 enters into a heating operation mode, namely, the semiconductor 402 is started to enter into the heating operation mode, the temperature of the gas in the closed air chamber 401 of the micro pressure controller 4 is increased, and the pressure of the gas in the closed air chamber 401 is gradually increased, so that the alarm and/or locking contact points of the density relay body 8 are respectively returned, and the intelligent control unit 5 immediately acquires the gas density value P and the temperature value T acquired by the pressure sensor 1 and the temperature sensor 2 through the contact points JK21 and JK22 respectively at the moment when the alarm and/or locking contact points return, and converts the gas density value P and the temperature value T into the gas density value corresponding to 20 ℃ according to the gas pressure-temperature characteristics, namely, the gas density value P ₂₀ Detecting a contact signal (alarm or latch contact) return value P of the gas density relay body 8 _F20 And (5) completing the on-line checking and diagnosis of the return value of the gas density relay body 8. The relay body 8 may thus be repeatedly checked and diagnosed a number of times (e.g., 2 to 3 times), and then its average value calculated. After the corresponding requirements are completed, the verification and diagnosis work of the gas density relay body 8 is completed. Then the relay sends out an instruction, and the micro control valve 3 is opened, so that the gas density relay body 8 is communicated with the electrical equipment on the gas path; and turns off the operating circuit of the semiconductor 402 of the micro pressure controller 4 to stop cooling or heating the semiconductor 402; then, the instruction is sent out, a control loop of the gas density relay body 8 is communicated through the intelligent control unit 5, namely, the contacts JK11 and JK12 of the electromagnetic relay JK1 of the contact signal sampling unit 10 are closed, and meanwhile, the contacts JK21 and JK22 of the JK2 are opened, so that a density monitoring loop of the gas density relay body 8 works normally, the gas density of the electrical equipment is safely monitored by the gas density relay body 8, and the electrical equipment works safely and reliably. Thus, the on-line checking and diagnosing work of the gas density relay body 8 is conveniently completed, and the safety operation of the electrical equipment is not influenced when the gas density relay body 8 is checked on line.

When the gas density relay is completedAfter the verification and diagnosis of the body 8, the intelligent control unit 5 is preset with a standard contact signal value P of the gas density relay _B20 The intelligent control unit controls the action value P of the gas density relay body 8 _J20 And standard contact signal value P _B20 Comparing to obtain a contact signal difference value |P _J20 -P _B20 I (I); if the contact signal is of the difference |P _J20 -P _B20 And if the I is within the preset threshold, the current working state of the monitoring part of the gas density relay body 8 is a normal working state, and if the I is within the preset threshold, the current working state is an abnormal working state. Meanwhile, the intelligent control unit 5 further acquires the gas density value P and the temperature value T acquired by the pressure sensor 1 and the temperature sensor 2, and automatically converts the gas density value P into the corresponding gas density value P at 20 ℃ according to the gas pressure-temperature characteristics ₂₀ And (3) completing the on-line monitoring of the gas density of the electrical equipment monitored by the relay. Namely, the intelligent control unit 5 timely collects the contact action signal value P of the gas density relay body 8 at the moment _J20 The detected contact signal value P of the gas density relay body 8 _J20 Standard (rated parameter) demand contact signal value P for density relay _B20 And comparing, wherein if the consistency is good, the gas density relay works normally without maintenance. I.e., -P _J20 -P _B20 And if the value is within the allowable set value, the gas density relay works normally without maintenance. The relay may be repeatedly checked a plurality of times (e.g., 2 to 3 times), and the average value thereof is calculated based on the result of each check.

In this embodiment, the intelligent control unit 5 receives the gas density value P monitored by the first pressure sensor 1A or the second pressure sensor 1B, the temperature value T monitored by the first temperature sensor 2A or the first temperature sensor 22, and the corresponding pressure drop value is Δp assuming that the temperature drop value is Δt; if the delta P/DELTAT I is equal to or greater than a preset threshold value, the intelligent control unit 5 sends out a liquefaction notification signal and/or information, and/or notifies the time of gas liquefaction and/or notifies the duration of gas liquefaction; or when the temperature is higher than the set value Ts, the intelligent control unit 5 receives the gas density value P monitored by the first pressure sensor 1A or the second pressure sensor 1B, the temperature value T monitored by the first temperature sensor 2A or the first temperature sensor 22, and if the temperature decrease value is Δt, the corresponding pressure decrease value is Δp, so as to obtain k1= - Δp/- Δt, and the intelligent control unit 5 stores the K1 value; when the temperature is lower than the set value Ts, the intelligent control unit 5 receives the gas density value P monitored by the first pressure sensor 1A or the second pressure sensor 1B, the temperature value T monitored by the first temperature sensor 2A or the first temperature sensor 22, and if the temperature decrease value is Δt, the corresponding pressure decrease value is Δp, such as Δp/Δt+.gtoreq.m×k1, where M is a preset coefficient, the intelligent control unit 5 sends out a liquefaction notification signal and/or information, and/or notifies the time when the gas liquefaction occurs, and/or notifies the duration of the gas liquefaction. Providing basis for liquefaction treatment of SF6 gas and data support.

In the present invention, the intelligent control unit 5 further includes: status indicator lights 12; the status indicator lamp 12 is connected with the intelligent control unit 5 to indicate the working status of the gas density relay, so that the observation is convenient. The gas density relay also comprises a micro water sensor which can monitor the gas micro water value on line; or, the gas density relay also comprises a micro water sensor and a gas circulation mechanism, so that the micro water value in the gas can be monitored on line.

In addition, the gas density relay further includes: the wireless communication unit 13, the wireless communication unit 13 is connected with the intelligent control unit 5, and the wireless communication unit 13 can be linked with a portable wireless reader, so that the portable wireless reader can read data and/or information monitored by the gas density relay.

In this embodiment, the gas density relay further includes: a nitrogen content sensor 15, the nitrogen content sensor 15 is arranged at the bottom of the relay shell 1402, the nitrogen content sensor 15 is connected with the intelligent control unit 5, the nitrogen content sensor 15 is configured to diagnose the leakage condition of SF6 gas, and when SF6 gas leaks from the gas density relay, the SF6 gas is leaked Due to the high specific gravity, the SF6 gas is accumulated at the bottom of the relay case 1402, the concentration of the SF6 gas at the bottom of the relay case 1402 is high, and the nitrogen content is reduced, when the intelligent control unit 5 detects that the nitrogen content is lower than the preset threshold value N2 through the nitrogen content sensor 15 _HL At this time, the intelligent control unit 5 outputs and/or uploads SF6 gas leakage information.

The data display 11 may be provided on the relay housing 14 of the gas density relay; alternatively, the data display 11 may be disposed outside the relay housing 14 of the gas density relay, and the data display 11 may be connected to the intelligent control unit 5 by wireless or wired means.

The gas density relay is also provided with a clock 16, the clock is connected with the intelligent control unit 5, and the intelligent control unit can enable the data display 11 to enter a non-display state in the evening according to the clock; alternatively, the gas density relay is further provided with a photoelectric sensor 17, the photoelectric sensor 17 is connected with the intelligent control unit 5, and the intelligent control unit 5 can enable the data display 11 to enter a non-display state in the evening according to the photoelectric sensor 17. The purpose of this is to extend the life of the data display 11 while at the same time saving electrical energy.

In order to improve the performance, the gas density relay further comprises a heat insulating member 19, wherein the heat insulating member 19 is arranged between the front portion 1401 and the rear portion 1402 of the housing 14, and the heat insulating member 19 is configured to reduce the influence of the heat generated by electronic components in the intelligent control unit 5 and the like on the monitoring precision of the density relay body 8, and improve the monitoring precision of the density relay body 8.

The gas density relay also has protection to the temperature of the electronic environment, prevents the operation at too low or too high temperature, and enables the operation within the allowable temperature range. A heater 18 and/or a radiator (fan) may be provided, the heater 18 being turned on at low temperature and the radiator (fan) being turned on at high temperature, so that the electronic components such as the pressure sensor and/or the intelligent control unit may operate reliably in low temperature or high temperature environments.

In addition, the intelligent indication remote transmission type gas density relay can further comprise a miniature alarm bell, wherein the miniature alarm bell is connected with the intelligent control unit 5 and is configured to send out an alarm signal when the gas density relay monitors that the gas density value and/or the temperature value inside the gas chamber of the electrical equipment are higher than corresponding preset thresholds. Specifically, when the intelligent control unit 5 collects the gas density value P of the pressure sensor 1 and/or the temperature sensor 2 or the preset threshold value corresponding to the ultrahigh temperature value T, the phenomenon that the gas density value is too high and/or the temperature value is too high is indicated to occur in the electric equipment, which indicates that serious problems exist in the electric equipment, the alarm is sent out through the miniature alarm bell, corresponding measures are taken to ensure the safety of on-site operation and maintenance personnel, and the expansion of accidents is avoided.

The intelligent control unit can automatically distribute gas relay communication address codes, and the background terminal sends addressing broadcast to each gas relay; after the gas relay not assigned with the equipment address receives the addressing broadcast, judging whether the input level of the current self arrangement sequence identification signal is in a suspended state or a preset level state; if yes, the gas relay identifies the address in the addressing broadcast as the address of the self equipment; if not, the gas relay waits for the background to send the addressing broadcast of the next address; or,

at the same time, the gas relay is used as a Modbus slave station, the address range is 1-247, the gas relay responds to a request initiated by a master station and must accept a write command in a broadcasting mode, and the address 0 is used as a broadcasting address. Referring to fig. 4, the intelligent control unit 5 is provided with a communication module, and the communication module uploads the monitored data and/or information to an internet background terminal, so that the internet background terminal can perform security management on the current gas density relay and the electrical equipment. The intelligent control unit can automatically allocate relay communication address codes, and the background terminal sends addressing broadcast to each relay; after receiving the addressing broadcast, the relay which is not allocated with the equipment address judges whether the input level of the current self arrangement sequence identification signal is in a suspended state or a preset level state; if yes, the relay identifies the address in the addressing broadcast as the address of the self equipment; if not, the relay waits for the background to send the addressing broadcast of the next address. As shown in fig. 4. The sequence identification signal may be generated by the internet background terminal or by the relay itself, where TX represents the upload data and RX represents the receive data. And (3) based on the input level being in a floating state, assigning addresses (equipment addresses) to the relays which are ranked first, respectively generating ranking sequence identification signals by the relays before the internet background terminal initiates a relay address addressing flow, namely before the internet background terminal sends first frame addressing broadcast to the relays, and setting the input level of the ranking sequence identification signals to be in a floating state. After receiving a first frame addressing broadcast sent by an internet background terminal, each relay changes the output level of an own arrangement sequence identification signal into a low level or a high level before identifying the address (equipment address) of the relay, and further changes the input level of other relays after the relay of the first order is ordered into the low level or the high level correspondingly. When the relay for ordering the first bit recognizes the address in the first frame addressing broadcast as the address of the relay itself based on the input level of the self-ordering recognition signal being in a floating state, the output level of the self-ordering recognition signal is changed from low level or high level to high level or low level correspondingly, so that the input level of the relay for ordering the second bit is changed to high level or low level correspondingly, and the input level of other relays after ordering the second bit is still kept to be low level or high level. This is very versatile and convenient to use.

When the diagnosis of the gas density relay body is completed by the relay, mutual comparison judgment can be automatically carried out, and if the error phase difference is large, an abnormal prompt can be sent out: the gas density relay body or the pressure sensor and the temperature sensor have problems. The relay can complete the mutual diagnosis function of the gas density relay body, the pressure sensor and the temperature sensor. Thus, a check gas density relay is not needed, and maintenance is avoided or reduced.

The intelligent gas density relay comprises a relay shell, a gas density relay body 8, a relay connector 6, a multi-way connector 7, a first pressure sensor 1A, a second pressure sensor 1B, a first temperature sensor 2A, a second temperature sensor 2B, a data display 11, a plurality of wiring fault diagnosis units 9 and an intelligent control unit 5. The intelligent control unit compares and diagnoses a first gas density value P1 acquired by a first pressure sensor 1A and a second gas density value P2 acquired by a second pressure sensor 1B under the same gas pressure; and/or the intelligent control unit compares and diagnoses a first temperature value T1 acquired by the first temperature sensor 2A and a second temperature value T2 acquired by the second temperature sensor 2B under the same gas temperature; or the intelligent control unit compares and diagnoses a first density value obtained by the first pressure sensor 1A and the first temperature sensor 2A and a second density value obtained by the second pressure sensor 1B and the second temperature sensor 2B under the same gas density; acquiring the current working state of the gas density relay monitoring part, and outputting an alarm signal or/and alarm information when the working state is abnormal; and the wiring fault diagnosis units are configured to diagnose the wiring states of the alarm or/and locking joints of the gas density relay, and if the wiring states of the alarm or/and locking joints of the gas density relay are abnormal, the wiring fault diagnosis units output a signal to the intelligent control unit, and the intelligent control unit outputs or/and uploads the wiring fault information of the joints. In addition, the micro control valve can be closed through the intelligent control unit, so that the gas density relay body is separated from the gas insulation electrical equipment on the gas path; pressure is adjusted through the miniature pressure controller, so that the density relay body is subjected to contact action, the contact action is transmitted to the intelligent control unit through the contact signal sampling unit, the intelligent control unit detects an alarm and/or locking contact action value and/or a return value of the gas density relay body according to a density value during contact action, online verification of the gas density relay body is completed, and the intelligent control unit uploads monitored data or/and information to an internet background terminal so that the internet background terminal can safely manage the current gas density relay body and electrical equipment. The operation condition of the gas density relay can be diagnosed without the need of an maintainer to the site, the reliability of a power grid is improved, the efficiency is improved, the cost is reduced, and the maintenance-free or less maintenance of the gas density relay can be realized. Meanwhile, the gas density of the gas-insulated or arc-extinguishing electrical equipment is monitored, meanwhile, the mutual verification of the mechanical part and the electronic part of the gas density relay can be realized, the maintenance-free or less maintenance is realized, the operation and maintenance cost is greatly reduced, and the safe operation of a power grid is ensured. In summary, the invention has the following meanings and characteristics: the operation and maintenance cost of a power supply company can be effectively reduced; (2) effectively improving the reliability and safety performance of the power grid; (3) effectively improving the management level of the power grid company; (4) the power grid is more intelligent and stronger.

The invention has been described with reference to a few embodiments. However, as is well known to those skilled in the art, other embodiments than the above disclosed invention are equally possible within the scope of the invention, as defined by the appended patent claims.

Generally, all terms used in the claims are to be interpreted according to their ordinary meaning in the technical field, unless explicitly defined otherwise therein. All references to "a/an/the [ means, component, etc. ]" are to be interpreted openly as referring to at least one instance of said means, component, etc., unless explicitly stated otherwise. The steps of any method disclosed herein do not have to be performed in the exact order disclosed, unless explicitly stated.

It will be appreciated by those skilled in the art that embodiments of the present application may be provided as a method, system, or computer program product. Accordingly, the present application may take the form of an entirely hardware embodiment, an entirely software embodiment, or an embodiment combining software and hardware aspects. Furthermore, the present application may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, and the like) having computer-usable program code embodied therein.

The present application is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems) and computer program products according to embodiments of the application. It will be understood that each flow and/or block of the flowchart illustrations and/or block diagrams, and combinations of flows and/or blocks in the flowchart illustrations and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.

These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.

These computer program instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.

Finally, it should be noted that: the above embodiments are only for illustrating the technical aspects of the present invention and not for limiting the same, and although the present invention has been described in detail with reference to the above embodiments, it should be understood by those of ordinary skill in the art that: modifications and equivalents may be made to the specific embodiments of the invention without departing from the spirit and scope of the invention, which is intended to be covered by the claims.

Claims

1. An intelligent gas density relay device, the device comprising: the gas density relay comprises a gas density relay body arranged in a first space in a relay shell, and a relay connector, a multi-way connector, a sensor measuring unit, an intelligent control unit and at least one wiring fault diagnosis unit which are arranged in a second space in the relay shell, wherein the first space and the second space are communicated through the multi-way connector; wherein,

2. The apparatus of claim 1, wherein the gas density relay body comprises: the device comprises an air bag, a sealing shell, a first corrugated pipe, a second corrugated pipe, a plurality of micro switches and a signal adjusting mechanism;

3. The apparatus of claim 2, wherein the signal conditioning mechanism comprises: the device comprises an adjusting screw, an adjusting rod, a disc and a fixing nut;

4. The apparatus of claim 1, wherein the sensor measurement unit comprises: at least one pair of pressure and temperature sensors; the intelligent control unit is used for automatically converting the pressure data acquired by the pressure sensor and the temperature data acquired by the temperature sensor into a gas density value corresponding to a preset temperature based on gas pressure-temperature characteristics, and completing on-line monitoring of the gas density of the target electrical equipment by the gas relay device.

5. The apparatus of claim 4, wherein the intelligent control unit is further configured to: when the sensor measuring unit comprises at least two pairs of pressure sensors and temperature sensors, the working state of the intelligent gas density relay device is determined, and when the working state is abnormal, abnormal working state alarming information is output;

6. The apparatus according to claim 1 or 5, wherein the intelligent control unit automatically converts the acquired pressure data and temperature data into a gas density value corresponding to a preset temperature based on a gas pressure-temperature characteristic.

7. The apparatus of claim 1, wherein each wiring fault diagnosis unit comprises: the first resistor R6, the rectifier bridge K, the second resistor R1, the third resistor R3, the fourth resistor R7, the fifth resistor R0, the field effect transistor Q, the optocoupler U, the first capacitor C3, the second capacitor C1 and the third capacitor C2; one end of the first resistor R6 and one end of the fifth resistor R0 are respectively connected with an alarm or locking joint PJ; the output end of the optical coupler U is connected with the intelligent control unit; when the wiring of the alarm contact or the locking contact is correct, the field effect transistor Q is conducted, so that the optocoupler U is driven, the optocoupler U outputs a logic low level, and the intelligent control unit acquires the logic low level in real time; if the connection of the alarm contact or the locking contact is broken, no power is connected and/or the connection is incorrect, the optical coupler U outputs a logic high level, the intelligent control unit acquires the logic high level in real time, and the intelligent control unit outputs and/or uploads contact connection fault information.

8. The apparatus of claim 7, wherein each junction wiring fault diagnosis unit further comprises: a TVS tube D1 and a voltage stabilizing tube D2; the TVS tube is connected to the output end of the rectifier bridge K and is used for absorbing transient high voltage input by an alarm or locking contact port caused by external reasons; the voltage stabilizing tube D2 is connected in parallel with two ends of the third resistor R3 and is used for ensuring that the driving voltage of the field effect tube Q is within a safe range.

9. The device of claim 1, further comprising a micro control valve, a micro pressure controller, and a contact signal sampling unit; wherein,

10. The apparatus of claim 9, wherein the contact signal sampling unit is electrically isolated from the gas density relay alarm or lockout contact signal when in a non-verified state; when in a verification state, the contact signal control loop of the density relay can be cut off, so that the contact action signal of the gas density relay can not be uploaded during verification, and the safe operation of a power grid can not be affected.

11. The device of claim 9, wherein the micro-control valve is a solenoid valve sealed within a cavity or housing.

12. The apparatus of claim 1, wherein the intelligent control unit is further configured to:

13. The apparatus of claim 1, wherein the intelligent control unit is further configured to: automatically distributing gas relay communication address codes, and sending addressing broadcast to each gas relay device by a background terminal; after receiving the addressing broadcast, the gas relay device without the equipment address judges whether the input level of the current self arrangement sequence identification signal is in a suspended state or a preset level state; if yes, the gas relay device identifies the address in the addressing broadcast as the address of the self equipment; if not, the gas relay waits for the background to send the addressing broadcast of the next address; or (b)

14. The apparatus of claim 1, wherein the apparatus further comprises:

15. The apparatus of claim 1, wherein the apparatus further comprises:

16. The apparatus of claim 1, wherein the apparatus further comprises: