SF6 / n2 mixed gas on-line monitoring and disposal device and method

Abstract

The application discloses a kind of / hybrid gas online monitoring and disposal device and method.The device includes online monitoring unit and portable gas disposal unit, online monitoring unit is installed at the gas chamber of gas insulated equipment Filling interface, for collecting pressure, temperature and density data;Portable gas disposal unit determines current component ratio according to the above data, and, gas make-up amount, and under the condition that no gas mixing tank is set, control gas and gas enter the gas chamber in the order of first and second.Supplying gas in the process, controller judges pressure abnormal drop according to each branch pressure detection value, and closes corresponding branch valve.The application can realize hybrid gas online monitoring, portable step-by-step gas supply and gas supply process safety protection.

Description

Technical Field

[0001] This invention belongs to the field of gas insulation technology for high-voltage electrical equipment, specifically relating to a... / Device and method for online monitoring and treatment of mixed gases. Background Technology

[0002] Gas-insulated equipment is widely used in gas-insulated metal-enclosed switchgear, gas-insulated transmission lines, and other high-voltage and ultra-high-voltage power equipment due to its advantages such as compact structure, small footprint, stable insulation performance, high operational reliability, and minimal impact from the external environment. Gases have excellent insulation properties, arc-quenching properties, and chemical stability, and have long been used as an important insulating medium in gas-insulated equipment.

[0003] With the increasing requirements for environmentally friendly operation of power equipment, the adoption of and Forming a mixed insulating gas in a certain proportion has become a way to reduce... This is an important technical approach that balances usage volume, insulation performance, and environmental protection requirements. For / For mixed gas insulation equipment, its operational reliability depends not only on parameters such as gas pressure, temperature, and density within the gas chamber, but also on... and The component ratios are closely related. Even after minor leaks, temperature changes, or gas replenishment operations during equipment operation, the total pressure of the mixed gas in the chamber may still be within the allowable range, but... and The component ratio may have deviated from the target range, thus affecting the gas insulation performance or causing... Inaccurate dosage control.

[0004] In order to solve / The problem of difficulty in controlling the replenishment ratio of mixed gases has been addressed by various detection and replenishment schemes proposed in existing technologies. For example, existing technologies disclose a... / The mixed gas replenishment device obtains parameters within the gas chamber through mixing ratio detection equipment and pressure detection equipment, and adjusts the gas supply according to the target pressure or target mixing ratio. Gases and Gas replenishment improves upon the difficulty in controlling the proportion of gas replenishment manually. Another existing solution allows for online monitoring of parameters such as pressure and temperature within the gas chamber of gas-insulated equipment, thus providing a data basis for judging the operating status of the gas chamber.

[0005] However, the above solutions still have the following shortcomings. First, most existing solutions focus on emergency gas replenishment, periodic testing, or gas modification operations. The gas replenishment detection structure is usually difficult to integrate with the online monitoring structure that is left at the gas chamber filling interface for a long time, thus making it difficult to continuously obtain data from the gas chamber. / State data of mixed gases. For long-term operation and maintenance scenarios involving multiple gas chambers or multiple gas-insulated devices, relying solely on temporary access detection and gas replenishment methods results in frequent on-site operations and low maintenance efficiency. Secondly, some existing solutions employ a pre-mixing method, i.e., first mixing... Gases and The gas is mixed in a mixing tank, gas storage buffer tank, or gas mixing device, and then the resulting mixture is injected into the gas chamber. While this type of solution can achieve a certain degree of mixing ratio control, the equipment typically requires a mixing storage tank, mixing pipelines, and related auxiliary components, resulting in a complex overall structure, large size and weight, making it inconvenient to move and use between substations, transmission lines, or multiple independent gas chambers. Furthermore, even if existing technologies can control gas replenishment based on parameters such as pressure and mixing ratio, they often focus more on the replenishment ratio and the control of the replenishment endpoint, while paying insufficient attention to abnormal changes in branch pressure during the replenishment process. During on-site gas replenishment... Intake branch, An abnormal pressure drop may occur in the intake or inflation branch due to factors such as a detached hose, loose connector, or pipe rupture. If the valve on the corresponding branch is not closed in time, it may cause… or Leaks and failed gas replenishment pose safety and environmental risks. Finally, gas-insulated equipment typically comprises multiple independent gas chambers, each with potentially different volumes, target pressures, and target component ratios. Configuring a separate complete gas replenishment device for each chamber would be costly; even using the same replenishment device for routine maintenance leaves room for improvement in terms of rapid connection, data matching, and on-demand gas replenishment between the replenishment device and different chambers. Summary of the Invention

[0006] To solve the problems in existing technologies / Addressing the shortcomings of long-term online monitoring of mixed gas insulation equipment, portable premixed gas replenishment without storage tanks, and the difficulty in simultaneously protecting against abnormal pressure during gas replenishment, one objective of this invention is to provide a... / Online monitoring and treatment device for mixed gases. To achieve the above objectives, the present invention adopts the following technical solution: a / An online monitoring and treatment device for mixed gases, comprising an online monitoring unit and a portable gas treatment unit; The online monitoring unit is installed at the gas chamber inflation port of the gas insulation equipment and includes an internal gas path, a pressure sensor, a temperature sensor, a density sensor, and a quick connection interface. The internal gas path connects the gas chamber to the quick connection interface. The portable gas disposal unit includes a controller, Intake branch 、 The system includes an intake branch, an inflation branch, a mass flow detection module, a pressure detection module, and a valve control module; among which: The SF6 intake branch and N2 intake branch are respectively used to connect Independent gas source and An independent air source, and the output ends of both are connected to the inflation branch via the valve control module, and the inflation branch is detachably connected to the quick connection interface; The Intake branch, No mixing tank is installed between the air intake branch and the air filling branch; The controller is signal-connected to the online monitoring unit, the mass flow monitoring module, the pressure detection module, and the valve control module. It determines the current component ratio based on the pressure, temperature, and density, and further determines the target component ratio based on the current component ratio, the gas chamber volume, the target pressure, and the target component ratio. Qi replenishment and Air replenishment volume; the controller controls the valve control module based on the cumulative flow from the mass flow detection module, so that... Gases and Gas first back The air enters the air chamber sequentially through the inflation branch; The pressure detection module includes components respectively disposed in the... Intake branch, The controller uses pressure sensors at both ends of the intake branch and the inflation branch to determine if there is an abnormal pressure drop and to close the valve of the corresponding branch based on the pressure detection values ​​at both ends of the corresponding branch.

[0007] Furthermore, the online monitoring unit also includes a check valve, which is disposed in the internal air circuit and located between the quick connection interface and the air chamber inflation interface.

[0008] Furthermore, the direction of conduction of the check valve is from the quick-connect interface to the air chamber inflation interface.

[0009] Furthermore, the controller stores... molar mass and The molar mass, the controller, based on the absolute pressure P collected by the pressure sensor, the temperature T collected by the temperature sensor, and the density ρ collected by the density sensor, according to... =ρRT / P calculates the average molar mass of the gas mixture. Where P is the pressure value converted to Pa; then according to =( - ) / ( - )calculate Volume fraction, of which for molar mass, for The molar mass.

[0010] Furthermore, the controller also stores the chamber volume, target pressure, and target component ratio. Based on the current component ratio, current chamber pressure, chamber volume, target pressure, and target component ratio, the controller determines the current volume of components in the chamber. and Current gas quantity and target state and The target gas quantity is determined based on the difference between the target gas quantity and the current gas quantity. Qi replenishment and Replenish Qi (vital energy).

[0011] Furthermore, the valve control module includes components disposed in the... Intake branch Control valve, located in Intake branch The control valve and the inflation control valve located on the inflation branch; when the controller is replenishing air, it first opens the control valve. Control valve and the inflation control valve and close the N2 control valve, in After the gas is replenished, turn off the [system / system]. Control valve, then open the Control valve and keep the inflation control valve open, in After the gas replenishment is complete, close the N2 control valve and the inflation control valve; wherein, the Control valve Both the control valve and the inflation control valve are solenoid valves.

[0012] Furthermore, the mass flow detection module includes components disposed in the... Intake branch and the above The mass flow sensor is located on the common pipeline after the intake branch lines merge; During the gas replenishment phase, the controller determines the flow rate based on the cumulative flow rate from the mass flow sensor. Has the required amount of supplemental air been reached? Qi replenishment amount; in During the gas replenishment phase, the controller determines the flow rate based on the cumulative flow rate from the mass flow sensor. Has the required amount of supplemental air been reached? Replenish Qi (vital energy).

[0013] Furthermore, when the pressure sensor readings at both ends of a pipeline drop simultaneously within 0.5 seconds, and the pressure drop exceeds 30% of the rated gas pressure, and the solenoid valve corresponding to that pipeline segment is in a state that has been opened for less than 2 seconds, the controller determines that a pipeline detachment anomaly has occurred. Alternatively, when the pressure sensor readings at both ends of a pipeline drop simultaneously within 0.5 seconds, and the pressure drop exceeds 10% of the rated gas pressure, and the solenoid valve corresponding to that pipeline segment is in a closed state or in a state that has been opened for more than 2 seconds, the controller determines that a pipeline detachment anomaly has occurred. After determining that a detachment anomaly has occurred, the controller closes all solenoid valves in the valve control module.

[0014] Furthermore, there are multiple online monitoring units, which are respectively installed in multiple gas insulation devices or multiple independent gas chambers of the same gas insulation device; the inflation branch of the portable gas handling unit is selectively connected to the quick connection interface of one of the online monitoring units, and the controller is selectively communicatively connected to one of the online monitoring units.

[0015] Furthermore, each online monitoring unit has identification information, which is stored in the non-volatile memory of the online monitoring unit. The identification information includes the online monitoring unit identification code, the scheduling number of the electrical bay where the gas chamber is located, the gas chamber number, the gas chamber volume, and the target... Volume fraction and target pressure; the identification information is transmitted to the controller via RS485 protocol.

[0016] Furthermore, the online monitoring unit also includes a micro-moisture sensor, which is connected to the internal gas path and used to detect moisture within the gas chamber. / Micro-water data for mixed gases.

[0017] One of the present inventions / Beneficial effects of online monitoring and treatment devices for mixed gases: By coordinating the online monitoring unit and the portable gas disposal unit, data can be collected from the gas chamber. / The device collects pressure, temperature, and density data of the mixed gas, and the controller determines the current component ratio and gas replenishment requirement based on the pressure, temperature, and density data. This solves the problem that existing technologies have difficulty continuously obtaining the state of the mixed gas in the gas chamber and that gas replenishment relies on manual calculation and operation. The device enables online monitoring and automatic gas replenishment control of the gas chamber of gas insulation equipment, which facilitates the long-term operation and maintenance management of power equipment.

[0018] By setting no band for premixing Gases and Gas mixing storage tank Intake branch, The coordination between the intake branch and the inflation branch, and the... Gases and Gas first back The gas is injected directly into the monitored gas chamber in sequence, which can complete the step-by-step gas replenishment without the need for a premixed storage tank. This solves the problems of large size, heavy weight, and difficult on-site transportation and deployment of existing gas mixing and replenishment equipment. It makes the portable gas handling unit compact and easy to move between multiple gas chambers, which facilitates rapid operation and maintenance at substations and transmission lines.

[0019] By cooperating with the set pressure detection module and the controller, it is possible to... Intake branch, When an abnormal pressure drop occurs in the air intake branch or the air filling branch, the valve on the corresponding branch will be automatically shut off. This solves the problem of gas leakage and air filling failure caused by hose detachment, loose joints or pipeline rupture during the on-site air filling process. The device has an abnormal shutdown protection function during the air filling process, which facilitates safe and reliable air filling operation under conditions of few or no personnel.

[0020] By selectively communicating and connecting multiple online monitoring units with the same portable gas handling unit via pipelines, the gas handling unit can be sequentially connected to the quick connection interface of different gas chambers. Based on the identification information of the currently connected gas chamber, the corresponding gas chamber volume, target pressure, and target component ratio can be retrieved. This solves the problems of high cost of configuring a complete gas replenishment device for each independent gas chamber and inconvenience of data matching during inspection and replenishment. As a result, one gas handling unit can provide on-demand gas replenishment for multiple gas-insulated devices or multiple independent gas chambers, which facilitates equipment deployment and operation and maintenance cost control.

[0021] By cooperating with the internal air circuit of the online monitoring unit, the connection between the air chamber and the external air circuit can be cut off after the air supply branch and quick connection interface are disconnected. This solves the problem of gas leakage from the air chamber during long-term installation of the online monitoring unit, allowing the online monitoring unit to remain in the gas-insulated equipment for a long time without affecting the normal operation of the equipment, and facilitating the connection between continuous status monitoring and immediate gas replenishment.

[0022] To achieve the above objectives, the present invention provides another technical solution: a... / The online monitoring and treatment method for mixed gases adopts one of the above-mentioned methods. / The online monitoring and treatment device for mixed gases shall be operated according to the following steps: The online monitoring unit installed at the gas chamber inflation port of the gas insulation equipment collects data from the gas chamber. / Pressure, temperature, and density of the gas mixture; The pressure, temperature, and density are sent to the controller of the portable gas handling unit; The controller is based on the pressure, temperature, density, and... molar mass and The molar mass calculation of the gas chamber / The current component ratio of the gas mixture; The controller determines the parameters based on the current component ratio, gas chamber volume, target pressure, and target component ratio. Qi replenishment and Qi replenishment amount; Connect the inflation branch of the portable gas handling unit to the quick-connect interface of the online monitoring unit, so that... Independent gas source and Independent gas sources are respectively passed through Intake branch and The air intake branch is connected to the inflation branch; The controller controls the valve control module, first making... Gas enters the gas chamber through the inflation branch, waiting... After replenishing Qi, then... Gas enters the gas chamber via the inflation branch; During the air replenishment process, the pressure detection module detects... Intake branch, Pressure of the intake branch and / or charging branch; when an abnormal drop in pressure is detected in the corresponding branch, close the valve on the corresponding branch.

[0023] Furthermore, first make Gas enters the gas chamber via the inflation branch, including: opening... Intake branch Control valve and inflation control valve on inflation branch, close Intake branch Control valve; the aforementioned re-use Gas enters the gas chamber via the inflation branch, including: closing the... Control valve, open the Control the valve and keep the inflation control valve open.

[0024] Furthermore, during the gas replenishment process, the mass flow rate is detected by the mass flow rate detection module. Cumulative traffic and Cumulative traffic; when The cumulative traffic has reached the preset level. When replenishing air volume, turn off the above Control valve, when The cumulative traffic has reached the preset level. When replenishing air volume, turn off the above The control valve and the inflation control valve.

[0025] Furthermore, when disassembling the portable gas handling unit, the inflation branch is disconnected from the quick-connect interface, and the check valve in the online monitoring unit is shut off to maintain the gas chamber's seal.

[0026] One of the present inventions / The beneficial effects of online monitoring and treatment methods for mixed gases and a / The beneficial effects of online monitoring and treatment devices for mixed gases are the same, and will not be elaborated here. Attached Figure Description

[0027] Figure 1 One of the inventions / A schematic diagram of the overall structure of the online monitoring and treatment device for mixed gases.

[0028] Figure 2 One of the inventions / Schematic diagram of the gas circuit connection structure of the online monitoring and treatment device for mixed gases. Detailed Implementation

[0029] To make the objectives, features and advantages of the present invention more apparent and understandable, the specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

[0030] Many specific details are set forth in the following description in order to provide a full understanding of the invention. However, the invention may also be practiced in other ways different from those described herein, and those skilled in the art can make similar extensions without departing from the spirit of the invention. Therefore, the invention is not limited to the specific embodiments disclosed below.

[0031] Secondly, the term "one embodiment" or "embodiment" as used herein refers to a specific feature, structure, or characteristic that may be included in at least one implementation of the present invention. The phrase "in one embodiment" appearing in different places in this specification does not necessarily refer to the same embodiment, nor is it a single or selective embodiment that is mutually exclusive with other embodiments.

[0032] Reference Figure 1 and Figure 2 This is the first embodiment of the present invention, which provides a / The online monitoring and handling device for mixed gases enables online monitoring of the gas chamber status of gas-insulated equipment, portable step-by-step gas replenishment, and valve shut-off protection against abnormal pressure during the gas replenishment process. It comprises an online monitoring unit and a portable gas handling unit. By installing the online monitoring unit, long-term monitoring data can be obtained from the gas chamber. / The system includes data on the pressure, temperature, and density of the mixed gas; a portable gas handling unit that connects to the online monitoring unit when gas replenishment is needed, and replenishes the gas chamber as required based on the online monitoring data; and a pressure detection module and a valve control module that detect abnormal pressure drops in the branch circuit and protect against valve closure during the gas replenishment process.

[0033] Specifically, the online monitoring unit is installed long-term at the gas chamber inflation port of gas-insulated equipment. It includes an internal gas path, pressure sensor, temperature sensor, density sensor, and quick-connect interface. The internal gas path connects the gas chamber to the quick-connect interface. The pressure sensor, temperature sensor, and density sensor are connected to or cooperate with the internal gas path to collect data from the gas chamber. / The system provides data on the pressure, temperature, and density of the mixed gas. A quick-connect interface allows the portable gas handling unit to be detachably connected to the online monitoring unit during gas replenishment. The online monitoring unit is installed in the gas chamber of the gas-insulated equipment via a gas chamber filling interface and remains in the field long-term to enable continuous monitoring of the equipment's operating status.

[0034] Furthermore, since different brands of gas-insulated equipment have different charging interfaces, the online monitoring unit is equipped with various replaceable adapters for connecting to the specified gas chamber charging interface of the gas-insulated equipment. The adapters may include at least one of DN20, DN8, and M26×1.5. The adapters can be threaded to the specified gas chamber charging interface of the gas-insulated equipment, and the piping has a tee connection to ensure that the online monitoring unit does not affect the operation and maintenance of the original equipment after long-term installation.

[0035] Furthermore, the online monitoring unit also includes a check valve, which is located in the internal air path of the online monitoring unit, between the quick-connect interface and the air chamber filling interface. The flow direction of the check valve is from the quick-connect interface to the air chamber filling interface. By setting up the check valve, during air replenishment... gas or Gas can enter the gas chamber through the quick-connect interface; when the portable gas handling unit is disconnected from the quick-connect interface, the check valve stops the gas flow from the gas chamber to the outside to keep the gas chamber sealed.

[0036] Preferably, the online monitoring unit also includes a micro-moisture sensor, which is connected to the internal gas path of the online monitoring unit and used to detect moisture within the gas chamber. / Micro-moisture data of the mixed gas. By setting up a micro-moisture sensor, the water content of the mixed gas in the gas chamber can be further obtained, providing auxiliary data for gas state assessment.

[0037] The portable gas disposal unit includes a controller, Intake branch, The system includes an intake branch, an inflation branch, a mass flow detection module, a pressure detection module, and a valve control module. The intake branch is used to connect Independent gas source The intake branch is used to connect Independent gas source Intake branch and The output end of the intake branch is connected to the inflation branch via a valve control module. The inflation branch is used for detachable connection to the quick-connect interface. (The last part, "By setting...", appears to be an unrelated instruction and is left untranslated.) Intake branch and Intake branch, Gases and Each gas is supplied by an independent gas source; by setting up inflation branches, the gas is... gas or The gas is delivered to the online monitoring unit and enters the gas chamber.

[0038] In one specific implementation, The input end of the intake branch is connected via pressure reducing valve 1. gas cylinder The input end of the intake branch is connected via pressure reducing valve 2. Gas cylinder. Gases and The gases are supplied by independent gas sources and are injected directly into the monitored gas chambers via the gas filling branch, without passing through the gas mixing tank used for pre-mixing.

[0039] Among them, the portable gas disposal unit is Intake branch, No pre-mixing is provided between the intake branch and the inflation branch. Gases and A gas mixing storage tank. Therefore, Gases and The gases do not need to be pre-mixed in the mixing tank. Instead, they enter the gas chamber through the corresponding inlet branch and the filling branch, and are mixed through gas diffusion inside the gas chamber. This reduces the size and weight of the portable gas handling unit and improves the flexibility of field deployment.

[0040] Furthermore, the valve control module includes components set in... Intake branch Control valve, set in Intake branch Control valve and inflation control valve installed on inflation branch. Control valves are used for control The opening and closing of the air branch, Control valves are used for control The air intake branch is open or closed; the inflation control valve is used to control the connection between the inflation branch and the online monitoring unit. In one specific embodiment, The control valves include solenoid valve 1 and solenoid valve 3. The control valves include solenoid valve 2 and solenoid valve 4, and the inflation control valves include solenoid valve 5 and solenoid valve 6.

[0041] Furthermore, the mass flow detection module includes components set in... Intake branch and The mass flow sensor is located on the common pipeline after the intake branch lines merge. Due to... Gases and Gas first back The air cells enter the air chamber in stages, therefore, in During the gas replenishment phase, the controller determines the flow rate based on the cumulative flow rate from the mass flow sensor. Has the required amount of supplemental air been reached? Qi replenishment amount; in During the gas replenishment phase, the controller determines the flow rate based on the cumulative flow rate from the mass flow sensor. Has the required amount of supplemental air been reached? Gas supply volume. This can be detected by setting up a mass flow rate detection module. Gases and The instantaneous and cumulative flow rates of the gas provide a data basis for determining when the valve control module will close.

[0042] Furthermore, the pressure detection module includes components respectively set at... Intake branch, Pressure sensors at both ends of the air intake branch and the air inflation branch. In one specific embodiment, during inflation, Gas enters intake hose 1 through pressure reducing valve 1. Pressure sensor 1 is installed upstream of intake hose 1, and pressure sensor 3 is installed in the common section after the intake branch. Pressure sensor 1 and pressure sensor 3 are used to monitor... Intake branch pressure; Gas enters the intake hose 2 through the pressure reducing valve 2. Pressure sensor 2 is installed upstream of the intake hose 2. At this time, pressure sensor 2 and pressure sensor 3 are used for monitoring. Intake branch pressure; pressure sensors 4 and 5 are used to monitor the inflation branch pressure. During non-inflation processes, i.e., when all solenoid valves are closed, only pressure sensor 1 is used for monitoring. The intake branch pressure is monitored only by pressure sensor 2, and only by pressure sensor 4. When the pressure in the corresponding pipeline drops suddenly, the controller controls the valve control module to shut off the corresponding solenoid valve to achieve pipeline disconnection protection.

[0043] Preferably, the controller establishes signal connections with the online monitoring unit, the mass flow detection module, the pressure detection module, and the valve control module, respectively. The online monitoring unit transmits the collected operating parameters such as pressure, temperature, and density to the controller via wired or wireless communication. The mass flow detection module transmits the accumulated flow to the controller, and the pressure detection module transmits the pressure detection values ​​of each branch to the controller. Based on the above data, the controller outputs control signals to the valve control module, providing data support for gas state assessment and automatic gas replenishment.

[0044] Working principle: The online monitoring unit is permanently installed at the gas chamber inflation port of the gas-insulated equipment. Pressure sensors, temperature sensors, and density sensors collect data from the gas chamber. / The system collects pressure, temperature, and density data of the mixed gas and sends this data to the controller of the portable gas handling unit. The controller determines the current component ratio based on the collected data and, in conjunction with the target pressure, target component ratio, and gas chamber volume, determines whether supplemental gas is needed and, if so, the amount of supplemental gas to be added.

[0045] When gas replenishment is required, connect the gas replenishment branch of the portable gas handling unit to the quick-connect interface of the online monitoring unit. The controller should be turned on first. Control valves and inflation control valves, and close them. Control valve, so that Gas from Independent gas source The air enters the air chamber through the intake branch, the charging branch, the quick-connect interface, and the check valve. The controller monitors the cumulative flow based on the mass flow detection module. Actual air replenishment volume, at The actual gas replenishment volume reached the determined target. Turn off after replenishing the gas volume Control valve. Then, the controller opens. Control valve and keep inflation control valve open, so that Gas from Independent gas source The air enters the air chamber through the intake branch, the charging branch, the quick-connect interface, and the check valve. The controller monitors the cumulative flow based on the mass flow detection module. Actual air replenishment volume, at The actual gas replenishment volume reached the determined target. Turn off after replenishing the gas volume Control valve and inflation control valve.

[0046] After gas replenishment is complete, disconnect the gas filling branch from the quick-connect interface and close the check valve in the online monitoring unit to maintain a sealed gas chamber. The online monitoring unit remains at the gas filling interface for continuous or periodic acquisition of mixed gas state data within the gas chamber.

[0047] In summary, the online monitoring unit, when used in conjunction with the portable gas handling unit, enables long-term monitoring of the gas chamber status and on-demand gas replenishment; it eliminates the need for a gas mixing storage tank. Intake branch, When the intake branch and the charging branch work together, step-by-step air replenishment can be completed without premixing; when the pressure detection module works with the valve control module, valve shut-off protection can be performed when the branch pressure drops abnormally.

[0048] Example 2 Reference Figure 1 and Figure 2 This is the second embodiment of the present invention. Unlike embodiment 1, this embodiment further provides a calculation method for the controller to determine the current component ratio and the amount of gas to be added based on pressure, temperature, and density, which is used to determine the amount of gas to be added based on online monitoring data. / The component ratios and replenishment amounts of the mixed gas.

[0049] Specifically, the controller stores molar mass and molar mass It also stores air chamber volume Target pressure The controller determines the ratio of the target components based on the absolute pressure collected by the pressure sensor. Temperature T collected by the temperature sensor and density ρ collected by the density sensor, combined with the gas constant The average molar mass of the mixed gas is calculated according to equation (1). : =ρ T / (1) in, The pressure value is converted to Pa; T is the temperature; ρ is the density of the gas mixture. Let be the gas constant. (Calculate) When the volume fraction is, , and Use consistent units of mass, such as kg / mol or g / mol. Preferably, the temperature sensor is installed in the same location as the gas chamber's operating environment so that the temperature T collected by the sensor reflects the operating temperature of the mixed gas inside the chamber.

[0050] Furthermore, the controller calculates the current... Volume fraction : =( - ) / ( - (2) in, for molar mass, for The molar mass. Currently. Volume fraction According to =1- Confirmed. Therefore, the controller can determine the location of the air chamber. / The current component ratio of the mixed gas.

[0051] The controller is based on the current calculations obtained above. Volume fraction ,current Volume fraction Current absolute pressure of the air chamber Preset air chamber volume ,Target Volume fraction and target pressure ,calculate Qi replenishment and The amount of air to be replenished. The specific calculation method is shown in equations (3) to (8): current Amount of substance: n =( ) / ( T)(3) current Amount of substance: n =( ) / ( T) (4) Target Amount of substance: n =( ) / ( T)(5) Target Amount of substance: n =( (1- )) / ( T)(6) Qi replenishment quality: m =(n - ) (7) Qi replenishment quality: m =(n - ) (8) Using equations (3) to (8) above, the controller can determine the values ​​based on the difference between the current air chamber state and the target air chamber state. Qi replenishment quality and Gas supply quality. The target pressure can be preset according to the operating requirements of the gas insulation equipment, for example, the target pressure can be 0.3MPa to 1.0MPa.

[0052] Calculation example: Given constants: The molar mass is 146 g / mol. The molar mass is 28 g / mol, and the gas constant R0 is 8.314 J / (mol·K).

[0053] The data collected by the online monitoring unit is: absolute gas pressure. The pressure is 0.45 MPa, the temperature T is 303 K, and the density ρ is 11000 g / m3.

[0054] According to equations (1) to (2), the amount of gas before replenishment can be calculated. The volume fraction is 28.457%. The volume fraction is 71.543%.

[0055] The device is preset with the following parameters: air chamber volume For 10m3, target Volume fraction The absolute pressure of the target gas is 0.3. It is 0.50 MPa.

[0056] According to equations (3) to (8), we can obtain the following results. Gas replenishment quality m It weighs 12718g. Gas replenishment quality m It weighs 3118g.

[0057] Working principle: The online monitoring unit collects data from the gas chamber. / The controller uses the pressure, temperature, and density data of the mixed gas as a basis for its operation. and Calculate the average molar mass of the gas mixture based on the molar mass, and then determine the current molar mass based on the average molar mass. Volume fraction and current Volume fraction. Subsequently, the controller determines the volume fraction based on the current absolute pressure of the gas chamber, the gas chamber volume, the target pressure, and the target component ratio. Qi replenishment and Determine the amount of air to replenish and control the subsequent step-by-step air replenishment process based on the determined amount of air to replenish.

[0058] In summary, when pressure sensors, temperature sensors, density sensors, and controllers work together, they can determine the optimal parameters based on long-term online data acquisition. / The current component ratio of the gas mixture, and further determination Qi replenishment and Replenish Qi (vital energy).

[0059] Example 3 Reference Figure 1 and Figure 2 This is the third embodiment of the present invention. Unlike embodiment 1 or embodiment 2, this embodiment further provides a pressure abnormal drop judgment, tube disconnection protection and multi-chamber reuse configuration scheme, which is used to protect the gas path abnormal during the gas replenishment process and enable the same portable gas handling unit to be adapted to multiple gas chambers.

[0060] Specifically, during the gas replenishment process, the pressure detection module detects... Intake branch, Pressure changes in the intake and inflation branches are monitored. The controller determines abnormal pressure drops based on the pressure sensor readings at both ends of the corresponding branch and closes the valves on the corresponding branch when an abnormal pressure drop is detected. By incorporating a pressure detection module, this can be achieved. Intake branch, The pressure status of the intake branch and the inflation branch is monitored in real time.

[0061] Furthermore, if the pressure sensor readings at both ends of a pipeline drop simultaneously within 0.5 seconds, and the pressure drop exceeds 30% of the rated gas pressure, and the solenoid valve corresponding to that pipeline is in the open state within 2 seconds, the controller determines that the pipeline has experienced a disconnection anomaly. Alternatively, if the pressure sensor readings at both ends of a pipeline drop simultaneously within 0.5 seconds, and the pressure drop exceeds 10% of the rated gas pressure, and the solenoid valve corresponding to that pipeline is in the closed state or in the open state after 2 seconds, the controller determines that the pipeline has experienced a disconnection anomaly.

[0062] Specifically, upon detecting a pipe disconnection anomaly in a branch, the controller will at least close the solenoid valve corresponding to that branch. Preferably, the controller will close all solenoid valves in the valve control module, specifically solenoid valves 1, 2, 3, 4, 5, and 6, and disable the gas filling function, without affecting the gas monitoring function of the online monitoring unit. This setting ensures timely disconnection of the gas path in case of dynamic anomalies during the gas replenishment process, while allowing the online monitoring unit to continue monitoring the gas chamber status.

[0063] Better, when When an intake manifold malfunctions, the controller shuts down. Control valves, namely, closing solenoid valve 1 and solenoid valve 3; when When an intake manifold malfunctions, the controller shuts down. The control valves, namely solenoid valves 2 and 4, are closed. When a pipe disconnection abnormality occurs in the inflation branch, the controller closes the inflation control valves, namely solenoid valves 5 and 6. To improve the protection level, the controller can also close all solenoid valves in the valve control module when a pipe disconnection abnormality occurs in any branch.

[0064] Furthermore, there are multiple online monitoring units, each installed in one of multiple gas-insulated devices or multiple independent gas chambers within the same gas-insulated device. Each online monitoring unit has identification information, which is stored in its non-volatile memory. The identification information includes the online monitoring unit identification code, the scheduling number of the electrical bay where the gas chamber is located, the gas chamber number, the gas chamber volume, and the target... Volume fraction and target pressure. By installing online monitoring units on different gas chambers, it is possible to collect data from each chamber separately. / Pressure, temperature, and density data of the mixed gas.

[0065] The portable gas handling unit's inflation branch selectively connects to the quick-connect interface of one of the online monitoring units, and the controller selectively communicates with one of the online monitoring units. Identification information is transmitted to the controller via the RS485 protocol, and the controller performs inflation based on the chamber parameters within the identification information.

[0066] Preferably, multiple online monitoring units can establish communication connections with the portable gas handling unit via wired or wireless communication. When the portable gas handling unit replenishes gas to a specific gas chamber, it only needs to connect the filling branch to the quick-connect interface corresponding to that gas chamber and call the parameters corresponding to that gas chamber to calculate and control the replenishment volume.

[0067] The remaining structure is the same as in Example 1 or Example 2.

[0068] Working principle: During the gas replenishment process, the controller continuously receives... Intake branch, The controller monitors the pressure sensor readings at both ends of the intake and charging branches. If the pressure readings at both ends of the pipeline simultaneously drop abnormally within a set time, and this drops to the corresponding pressure drop threshold for the solenoid valve, the controller determines that a pipe disconnection anomaly has occurred. The controller then outputs a shutdown signal to the valve control module, closing the solenoid valve on the corresponding branch or closing all solenoid valves, and disabling the charging function. The online monitoring unit remains at the gas chamber charging interface for subsequent monitoring of the mixed gas state within the gas chamber.

[0069] Multiple online monitoring units are permanently installed on multiple gas chambers, each collecting pressure, temperature, and density data within its respective chamber. When a chamber requires refilling, a portable gas handling unit is moved to that chamber, and the refill branch is connected to the quick-connect interface of the corresponding online monitoring unit. Simultaneously, a communication connection is established between the controller and the online monitoring unit. The controller retrieves the corresponding chamber parameters based on the identification information of the online monitoring unit, calculates the refill volume based on the current monitoring data, and then executes the refill procedure. back The gas is replenished in stages. After replenishment is complete, disconnect the connection between the inflation branch and the quick-connect interface, and the portable gas handling unit can be moved to the next gas chamber for continued use.

[0070] In summary, the pressure detection module and valve control module, when used together, can monitor the pressure during the gas replenishment process. Intake branch, Abnormal pressure drops in the intake and charging branches are detected, and the solenoid valves are shut off in the event of a pipe disconnection. Multiple online monitoring units, when used in conjunction with the same portable gas handling unit, allow a single portable gas handling unit to selectively connect to multiple gas-insulated devices or multiple independent gas chambers.

[0071] Example 4 Reference Figure 1 and Figure 2 This is the fourth embodiment of the present invention, which provides a / The method for online monitoring and treatment of mixed gases adopts the approach described in any one of Examples 1 to 3. / The online monitoring and treatment device for mixed gases can achieve online monitoring of the gas chamber status, calculation of component ratios, on-demand gas replenishment, and valve shut-off protection in case of abnormal pressure.

[0072] Specifically, the method includes the following steps: Step S101: Collect data from the gas chamber using an online monitoring unit that is permanently installed at the gas chamber inflation port of the gas insulation equipment. / The pressure, temperature, and density of the mixed gas are monitored. An online monitoring unit is permanently positioned at the gas chamber filling interface and continuously or periodically collects data. In some embodiments, a micro-water sensor is also used to collect data within the gas chamber. / Micro-water data for mixed gases.

[0073] Step S102: The collected pressure, temperature and density are transmitted to the controller of the portable gas handling unit via wired or wireless communication.

[0074] Step S103: The controller, based on the received absolute pressure P, temperature T, density ρ, and pre-stored... molar mass and molar mass Calculate the air chamber / The current component ratio of the gas mixture. The specific calculation method is as follows: First, based on the gas mixture density ρ, temperature T, pressure P, and gas constant... Calculate the average molar mass of the gas mixture ,Right now =ρ T / P, where P needs to be converted to Pa units; then, according to =( - ) / ( - Calculate the current Volume fraction, of which , and Adopt a consistent unit of mass; currently Volume fraction can be determined according to =1- Sure.

[0075] Step S104: The controller calculates the current... Volume fraction ,current Volume fraction Combined with the pre-stored air chamber volume Target pressure The proportions of the target components are determined separately. Qi replenishment and Air replenishment volume. Specifically, the controller can determine the current air volume in each chamber. and Current gas quantity and target state and The target gas quantity is determined based on the difference between the target gas quantity and the current gas quantity. Qi replenishment and Gas replenishment volume. The specific calculation method is as shown in equations (3) to (8) in Example 2.

[0076] Step S105: Connect the inflation branch of the portable gas handling unit to the quick-connect interface of the online monitoring unit, so that... Independent gas source and Independent gas sources are respectively passed through Intake branch and The intake branch is connected to the inflation branch.

[0077] Step S106: The controller controls the valve control module, first making... Gas enters the gas chamber through the inflation branch, waiting... After replenishing Qi, then... Gas enters the gas chamber through the inflation branch. Specifically, the controller is activated. Intake branch Control valve and inflation control valve on inflation branch, close Intake branch Control valve, so that Gas from Independent gas source The air intake branch, the air charging branch, the quick-connect interface, and the check valve enter the air chamber. When The cumulative traffic has reached the preset level. When replenishing gas, the controller is turned off. Control valve. Then, the controller opens. Control valve and keep inflation control valve open, so that Gas from Independent gas source The air intake branch, the air charging branch, the quick-connect interface, and the check valve enter the air chamber. When The cumulative traffic has reached the preset level. When replenishing gas, the controller is turned off. Control valve and inflation control valve.

[0078] Step S107: During the air replenishment process, the pressure detection module detects... Intake branch, The pressure of the intake branch and / or the charging branch. When the controller detects that the pressure sensor readings at both ends of a pipeline drop simultaneously within 0.5 seconds, and the pressure drop exceeds 30% of the rated gas pressure, and the solenoid valve corresponding to that pipeline segment is in the open state within 2 seconds, the controller determines that a pipeline segment has experienced a disconnection anomaly; or, when the pressure sensor readings at both ends of a pipeline drop simultaneously within 0.5 seconds, and the pressure drop exceeds 10% of the rated gas pressure, and the solenoid valve corresponding to that pipeline segment is in the closed state or in the open state after 2 seconds, the controller determines that a pipeline segment has experienced a disconnection anomaly; after determining that a disconnection anomaly has occurred, the controller closes at least the solenoid valves on the corresponding branch of that pipeline segment; preferably, the controller closes all solenoid valves in the valve control module.

[0079] Step S108: In Gases and After gas replenishment is complete, disconnect the inflation branch of the portable gas handling unit from the quick-connect interface of the online monitoring unit. Upon disconnection, the check valve within the online monitoring unit will shut off to maintain a sealed gas chamber. The online monitoring unit will remain permanently positioned at the gas chamber inflation interface for continuous or periodic data collection of the gas chamber's status.

[0080] Furthermore, the method also includes a post-gas replenishment verification step: after a preset time interval following gas replenishment, the gas chamber is monitored again by the online monitoring unit. / The pressure, temperature, and density of the mixed gas were determined, and the calculations were recalculated. / The component ratio of the mixed gas. If the recalculated component ratio or pressure is not within the target range, the corrected gas replenishment amount can be re-determined based on the re-collected data, and corrected gas replenishment can be performed. The preset interval can be determined based on the gas chamber volume. For example, when the gas chamber volume is no greater than 5 cubic meters, the interval should be no less than 6 hours; when the gas chamber volume is greater than 15 cubic meters but no greater than 25 cubic meters, the interval should be no less than 12 hours; when the gas chamber volume is greater than 25 cubic meters, the interval should be no less than 18 hours. After the preset time after gas replenishment is completed, monitoring and gas replenishment operations can be repeated.

[0081] Furthermore, the method also includes a multi-chamber inspection and gas replenishment step: when multiple gas chambers need to be replenished, the portable gas handling unit connects sequentially to the online monitoring unit corresponding to each gas chamber. After each connection, the controller obtains the identification information of the currently connected online monitoring unit, retrieves the gas chamber volume, target pressure, and target component ratio of the corresponding gas chamber, and then performs the gas replenishment operation for the corresponding gas chamber.

[0082] The remaining structure is the same as in Example 1, Example 2 or Example 3.

[0083] Working principle: The online monitoring unit remains stationary at the gas chamber filling interface, continuously or periodically collecting pressure, temperature, and density data. When the controller determines that gas replenishment is needed, it connects the portable gas handling unit to the online monitoring unit of the target gas chamber. The controller acquires the current gas chamber status parameters, calculates the component ratio and replenishment volume, and then proceeds according to the specified steps. back The gas replenishment process is performed automatically in sequence. During replenishment, the mass flow detection module monitors the cumulative gas flow, and the pressure detection module monitors the pressure of each branch. If an abnormal pressure drop occurs, the controller closes the valve on the corresponding branch or closes all solenoid valves. After replenishment is complete, the gas supply branch is disconnected from the quick-connect interface, and the check valve closes to maintain a sealed gas chamber.

[0084] In summary, by employing the above methods and steps, and using an online monitoring unit in conjunction with a portable gas disposal unit, it is possible to collect data from the gas chamber. / The controller monitors the pressure, temperature, and density data of the mixed gas, and calculates the current component ratio and replenishment amount based on this data. This is done by first... back The step-by-step gas replenishment sequence, without setting a pre-mixing step. Gases and The gas replenishment is completed under the premise of a mixed gas storage tank. The replenishment process involves... Intake branch, Pressure monitoring and abnormal shutdown of the intake and charging branches allow valves to be closed in case of abnormal pressure drops. A post-charge verification procedure allows for verification of the pressure and component ratios after the charge.

[0085] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit it. Although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention, and all such modifications or substitutions should be covered within the scope of the claims of the present invention.

Claims

1. A kind / The online monitoring and treatment device for mixed gases is characterized in that, Includes online monitoring units and portable gas handling units; The online monitoring unit is installed at the gas chamber inflation port of the gas insulation equipment and includes an internal gas path, a pressure sensor, a temperature sensor, a density sensor, and a quick connection interface. The internal gas path connects the gas chamber to the quick connection interface. The portable gas disposal unit includes a controller, Intake branch 、 The system includes an intake branch, an inflation branch, a mass flow detection module, a pressure detection module, and a valve control module; among which: The SF6 intake branch and N2 intake branch are respectively used to connect Independent gas source and An independent air source, and the output ends of both are connected to the inflation branch via the valve control module, and the inflation branch is detachably connected to the quick connection interface; The Intake branch, No mixing tank is installed between the air intake branch and the air filling branch; The controller is signal-connected to the online monitoring unit, the mass flow monitoring module, the pressure detection module, and the valve control module. It determines the current component ratio based on the pressure, temperature, and density, and further determines the target component ratio based on the current component ratio, the gas chamber volume, the target pressure, and the target component ratio. Qi replenishment and Air replenishment volume; the controller controls the valve control module based on the cumulative flow from the mass flow detection module, so that... Gases and Gas first back The air enters the air chamber sequentially through the inflation branch; The pressure detection module includes components respectively disposed in the... Intake branch, The controller uses pressure sensors at both ends of the intake branch and the inflation branch to determine if there is an abnormal pressure drop and to close the valve of the corresponding branch based on the pressure detection values ​​at both ends of the corresponding branch.

2. The one described in claim 1 / The online monitoring and treatment device for mixed gases is characterized by: The online monitoring unit also includes a check valve, which is installed in the internal air circuit and located between the quick connection interface and the air chamber inflation interface.

3. The one described in claim 2 / The online monitoring and treatment device for mixed gases is characterized by: The check valve is directed from the quick-connect interface to the air chamber inflation interface.

4. The one described in claim 1 / The online monitoring and treatment device for mixed gases is characterized by: The controller stores molar mass and The molar mass, the controller, based on the absolute pressure P collected by the pressure sensor, the temperature T collected by the temperature sensor, and the density ρ collected by the density sensor, according to... =ρRT / P calculates the average molar mass of the gas mixture. Where P is the pressure value converted to Pa; then according to =( - ) / ( - )calculate Volume fraction, of which for molar mass, for The molar mass.

5. The one described in claim 4 / The online monitoring and treatment device for mixed gases is characterized by: The controller also stores the chamber volume, target pressure, and target component ratio. Based on the current component ratio, current chamber pressure, chamber volume, target pressure, and target component ratio, the controller determines the current volume of components in the chamber. and Current gas quantity and target state and The target gas quantity is determined based on the difference between the target gas quantity and the current gas quantity. Qi replenishment and Replenish Qi.

6. The one described in claim 5 / The online monitoring and treatment device for mixed gases is characterized by: The valve control module includes components disposed in the... Intake branch Control valve, located in Intake branch Control valve and inflation control valve provided on the inflation branch; When the controller is replenishing air, it first activates the... Control valve and the inflation control valve and close the N2 control valve, in After the gas is replenished, turn off the [system / system]. Control valve, then open the Control valve and keep the inflation control valve open, in After the gas replenishment is complete, close the N2 control valve and the inflation control valve; wherein, the Control valve Both the control valve and the inflation control valve are solenoid valves.

7. The one described in claim 1 / The online monitoring and treatment device for mixed gases is characterized by: The mass flow detection module includes components disposed in the... Intake branch and the Mass flow sensor on the common pipeline after the intake branch lines merge; exist During the gas replenishment phase, the controller determines the flow rate based on the cumulative flow rate from the mass flow sensor. Has the required amount of supplemental air been reached? Qi replenishment amount; in During the gas replenishment phase, the controller determines the flow rate based on the cumulative flow rate from the mass flow sensor. Has the required amount of supplemental air been reached? Replenish Qi.

8. The one described in claim 6 / The online monitoring and treatment device for mixed gases is characterized by: When the pressure sensor readings at both ends of a pipeline drop simultaneously within 0.5 seconds, and the pressure drop exceeds 30% of the rated gas pressure, and the corresponding solenoid valve for that pipeline segment is in the open state for less than 2 seconds, the controller determines that a pipeline detachment anomaly has occurred. Alternatively, when the pressure sensor readings at both ends of a pipeline drop simultaneously within 0.5 seconds, and the pressure drop exceeds 10% of the rated gas pressure, and the corresponding solenoid valve for that pipeline segment is in the closed state or in the open state for more than 2 seconds, the controller determines that a pipeline detachment anomaly has occurred. Upon determining that a detachment anomaly has occurred, the controller closes all solenoid valves in the valve control module.

9. The one described in claim 1 / The online monitoring and treatment device for mixed gases is characterized by: The online monitoring unit comprises multiple units, which are respectively installed in multiple gas-insulated devices or multiple independent gas chambers of the same gas-insulated device; the inflation branch of the portable gas handling unit is selectively connected to the quick-connect interface of one of the online monitoring units, and the controller is selectively communicatively connected to one of the online monitoring units.

10. The one described in claim 9 / The online monitoring and treatment device for mixed gases is characterized by: Each online monitoring unit has identification information, which is stored in the non-volatile memory of the online monitoring unit. The identification information includes the online monitoring unit identification code, the scheduling number of the electrical bay where the gas chamber is located, the gas chamber number, the gas chamber volume, and the target. Volume fraction and target pressure; the identification information is transmitted to the controller via RS485 protocol.

11. The one described in claim 1 / The online monitoring and treatment device for mixed gases is characterized by: The online monitoring unit also includes a micro-water sensor, which is connected to the internal gas path and used to detect moisture within the gas chamber. / Micro-water data for mixed gases.

12. A kind / The method for online monitoring and treatment of mixed gases is characterized by, The method described in any one of claims 1 to 11 / The online monitoring and treatment device for mixed gases is executed, and the method includes: The online monitoring unit installed at the gas chamber inflation port of the gas insulation equipment collects data from the gas chamber. / Pressure, temperature, and density of the gas mixture; The pressure, temperature, and density are sent to the controller of the portable gas handling unit; The controller is based on the pressure, temperature, density, and... molar mass and The molar mass calculation of the gas chamber / The current component ratio of the mixed gas; The controller determines the parameters based on the current component ratio, gas chamber volume, target pressure, and target component ratio. Qi replenishment and Qi replenishment amount; Connect the inflation branch of the portable gas handling unit to the quick-connect interface of the online monitoring unit, so that... Independent gas source and Independent gas sources are respectively passed through Intake branch and The air intake branch is connected to the inflation branch; The controller controls the valve control module, first making... Gas enters the gas chamber through the inflation branch, waiting... After replenishing Qi, then... Gas enters the gas chamber via the inflation branch; During the air replenishment process, the pressure detection module detects... Intake branch, Pressure of the intake branch and / or charging branch; when an abnormal drop in pressure is detected in the corresponding branch, close the valve on the corresponding branch.

13. The one described in claim 12 / The method for online monitoring and treatment of mixed gases is characterized by: First Gas enters the gas chamber via the inflation branch, including: opening... Intake branch Control valve and inflation control valve on inflation branch, close Intake branch Control valve; the aforementioned re-use Gas enters the gas chamber via the inflation branch, including: closing the... Control valve, open the Control the valve and keep the inflation control valve open.

14. The one described in claim 13 / The method for online monitoring and treatment of mixed gases is characterized by: During the gas replenishment process, the mass flow rate is detected by the mass flow rate detection module. Cumulative traffic and Cumulative traffic; when The cumulative traffic has reached the preset level. When replenishing air volume, turn off the above Control valve, when The cumulative traffic has reached the preset level. When replenishing air volume, turn off the above The control valve and the inflation control valve.

15. The one described in claim 12 / The method for online monitoring and treatment of mixed gases is characterized by: When disassembling the portable gas handling unit, disconnect the inflation branch from the quick-connect interface and shut off the check valve in the online monitoring unit to keep the gas chamber sealed.

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