CN114748975A - Online purifying device and system for insulating gas - Google Patents
Online purifying device and system for insulating gas Download PDFInfo
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- CN114748975A CN114748975A CN202210434310.9A CN202210434310A CN114748975A CN 114748975 A CN114748975 A CN 114748975A CN 202210434310 A CN202210434310 A CN 202210434310A CN 114748975 A CN114748975 A CN 114748975A
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- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/02—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by adsorption, e.g. preparative gas chromatography
- B01D53/04—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by adsorption, e.g. preparative gas chromatography with stationary adsorbents
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- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
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- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
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- B01D2257/30—Sulfur compounds
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Abstract
The invention provides an insulating gas online purification device and system, wherein the device comprises a monitoring module, an online purification treatment module, a gas storage module and a control module; the control module is used for circularly executing an inspiration process and an expiration process until the gas quality of the electrical equipment is detected to be qualified; the control module is also used for calculating the gas loss after each circulation according to the pressure of the gas storage module, and correcting a first preset rate and a second preset rate of the next circulation according to the gas loss of each circulation and a pre-stored loss-rate control curve; the loss-rate control curve represents the optimal values of the first preset rate and the second preset rate at each gas loss. Through the first preset speed and the second preset speed which are continuously corrected, the accurate control of the pressure of the insulating gas in the electrical equipment can be realized, and the pressure in the purification process is effectively prevented from exceeding an alarm limit value.
Description
Technical Field
The application belongs to the technical field of gas purification, and particularly relates to an online insulating gas purification device and system.
Background
Sulfur hexafluoride (SF6) gas has excellent electrical insulation and arc extinguishing properties, and is widely used in electrical equipment such as high-voltage switches.
In the prior art, because the uninterrupted purification treatment method is inaccurate in controlling the pressure change rate, the gas pressure in the running electrical equipment is changed, the instantaneous pressure reduction or pressure rise of the gas in the electrical equipment exceeds an alarm limit value, and the switch of the high-voltage electrical equipment is locked and powered off.
Disclosure of Invention
In view of the above, the present invention provides an online purification apparatus and system for insulating gas, and aims to solve the problem of inaccurate control of pressure change rate in the process of uninterrupted purification treatment in the prior art.
A first aspect of an embodiment of the present invention provides an online insulating gas purification apparatus for purifying an insulating gas of an operating electrical device, the apparatus including: the system comprises a monitoring module, an online purification treatment module, a gas storage module and a control module;
the monitoring module is used for monitoring the pressure of the insulating gas in the electrical equipment and reporting the pressure to the control module;
the online purification treatment module is used for purifying the insulating gas sucked from the electrical equipment in the air suction process of the device and storing the insulating gas into the gas storage module;
the gas storage module is used for recharging the stored insulating gas into the electrical equipment during the exhalation process of the device;
the control module is used for circularly executing the inspiration process and the expiration process until the gas quality of the electrical equipment is detected to be qualified;
the inspiration process comprises: sucking insulating gas from the electrical equipment at a first preset rate to reduce the pressure of the electrical equipment to a minimum value;
the exhalation process comprises: refilling insulating gas into the electrical equipment at a second preset speed so as to increase the pressure of the electrical equipment to a maximum value;
the monitoring module is also used for monitoring the pressure of the gas storage module and reporting the pressure to the control module;
the control module is also used for calculating the gas loss after each circulation according to the pressure of the gas storage module, and correcting a first preset rate and a second preset rate of the next circulation according to the gas loss of each circulation and a pre-stored loss-rate control curve;
the loss-rate control curve represents the optimal values of the first preset rate and the second preset rate for each gas loss.
In one possible implementation, the apparatus further includes: a temperature sensor; the temperature sensor is connected with the control module; the control module stores loss-rate control curves at different temperatures; the temperature sensor is used for measuring the ambient temperature; the control module is also used for selecting a loss-rate control curve according to the ambient temperature measured by the temperature sensor.
In one possible implementation, the control module includes an adjustable mass flow meter; the control device is used for adjusting the gas mass flow in the inspiration process through the adjustable mass flow meter so as to realize the control of the first preset speed, and adjusting the gas mass flow in the expiration process through the adjustable mass flow meter so as to realize the control of the second preset speed.
In one possible implementation, the apparatus further comprises a first three-way valve and a second three-way valve;
the first three-way valve is respectively connected with the electrical equipment, the output end of the gas storage module and the first end of the adjustable mass flow meter;
the second three-way valve is respectively connected with the electrical equipment, the input end of the online purification treatment module and the second end of the adjustable mass flow meter;
the output end of the online purification treatment module is connected with the input end of the gas storage module; the first and second three-way valves are controlled by the control module.
In one possible implementation, the apparatus further includes a sampling detection module;
the sampling detection module is arranged between the first three-way valve and the second three-way valve; the sampling detection module is connected with the control module; the sampling detection module is used for respectively sampling and detecting the insulating gas sucked in the air suction process so as to determine the impurity composition condition of the internal insulating gas of the electrical equipment and report the impurity composition condition to the control module;
a plurality of types of adsorbents are arranged in the online purification treatment module;
the control module is used for indicating the online purification treatment module to select corresponding adsorbents according to the impurity composition condition.
In a possible implementation manner, the sampling detection module is further configured to perform sampling detection on the insulation gas backfilled in the exhalation process respectively to determine an impurity purification condition and report the impurity purification condition to the control module;
the control module is used for determining the running state of the insulating gas online purification device according to the impurity purification condition.
In one possible implementation, the monitoring module includes a first pressure sensor, a second pressure sensor, a third pressure sensor connected to the electrical device, and a fourth pressure sensor connected to the gas storage module;
the first pressure sensor, the second pressure sensor and the third pressure sensor are all used for measuring the pressure of the insulating gas in the electrical equipment; the fourth pressure sensor is for measuring a pressure of an insulating gas within the gas storage module.
In a possible implementation manner, the device further comprises a pressure regulating valve, a fifth pressure sensor, a first electromagnetic valve and a second electromagnetic valve;
the pressure regulating valve is arranged at the output end of the gas storage module; the fifth pressure sensor is used for detecting the pressure of the gas in the pipeline after being adjusted by the pressure adjusting valve;
the first solenoid valve and the second solenoid valve are controlled by the control device; the first electromagnetic valve is disposed between the electrical equipment and the first three-way valve; the second electromagnetic valve is provided between the pressure regulating valve and the first three-way valve.
A first aspect of an embodiment of the present invention provides an online insulating gas purification system, including: at least one online insulating gas purification device and a control center as described above in the first aspect; each insulating gas online purification device is connected with one electrical device; and the control center is respectively connected with each insulating gas online purification device.
In a possible implementation manner, the control center is used for sending a purification command to any one of the insulating gas online purification devices connected with the control center;
the online insulating gas purification device is used for purifying the insulating gas in the connected electrical equipment after receiving the purification instruction;
and the control center is also used for receiving the running state sent by each insulating gas online purification device.
The embodiment of the invention provides an insulating gas online purification device and system, which comprise a monitoring module, an online purification treatment module, a gas storage module and a control module; the control module is used for circularly executing an inspiration process and an expiration process until the gas quality of the electrical equipment is detected to be qualified; the control module is also used for calculating the gas loss after each circulation according to the pressure of the gas storage module, and correcting a first preset rate and a second preset rate of the next circulation according to the gas loss of each circulation and a pre-stored loss-rate control curve; the loss-rate control curve represents the optimal values of the first preset rate and the second preset rate at each gas loss. Through the first preset speed and the second preset speed which are continuously corrected, the pressure of the insulating gas in the electrical equipment can be accurately controlled, and the pressure in the purification process is effectively prevented from exceeding an alarm limit value.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the embodiments or the prior art descriptions will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without inventive exercise.
FIG. 1 is a schematic structural diagram of an online purification device for insulating gas provided by an embodiment of the invention;
FIG. 2 is a schematic structural diagram of an online purification apparatus for insulating gas according to another embodiment of the present invention;
fig. 3 is a schematic structural diagram of an online insulating gas purification system according to an embodiment of the present invention.
Detailed Description
In the following description, for purposes of explanation and not limitation, specific details are set forth such as particular system structures, techniques, etc. in order to provide a thorough understanding of the embodiments of the invention. It will be apparent, however, to one skilled in the art that the present invention may be practiced in other embodiments that depart from these specific details. In other instances, detailed descriptions of well-known systems, devices, circuits, and methods are omitted so as not to obscure the description of the present invention with unnecessary detail.
Fig. 1 is a schematic structural diagram of an online insulating gas purification apparatus according to an embodiment of the present invention. As shown in fig. 1, in this embodiment, an insulating gas on-line purification apparatus 1 is used for purifying an insulating gas of an electrical device in operation. The device includes: the system comprises a monitoring module 11, an online purification treatment module 12, a gas storage module 13 and a control module 14;
the monitoring module 11 is used for monitoring the pressure of the insulating gas in the electrical equipment and reporting the pressure to the control module 14;
the online purification treatment module 12 is used for purifying the insulating gas sucked from the electrical equipment in the device air suction process and storing the insulating gas into the gas storage module 13;
the gas storage module 13 is used for recharging the stored insulating gas into the electrical equipment during the expiration process of the device;
the control module 14 is used for circularly executing an inspiration process and an expiration process until the gas quality of the electrical equipment is detected to be qualified;
the inspiration process comprises the following steps: absorbing insulating gas from the electrical equipment at a first preset rate so as to reduce the pressure of the electrical equipment to a minimum value;
the exhalation process comprises the following steps: refilling insulating gas into the electrical equipment according to a second preset speed so as to increase the pressure of the electrical equipment to a maximum value;
the monitoring module 11 is further configured to monitor the pressure of the gas storage module 13 and report the pressure to the control module 14;
the control module 14 is further configured to calculate a gas loss after each cycle is ended according to the pressure of the gas storage module 13, and correct a first preset rate and a second preset rate of a next cycle according to the gas loss of each cycle and a pre-stored loss-rate control curve;
the loss-rate control curve represents the optimal values of the first preset rate and the second preset rate at each gas loss.
In this embodiment, the insulating gas may be sulfur hexafluoride. The online purification treatment module 12, the gas storage module 13 and the electrical equipment are connected in pairs through vacuum pipelines. On the pipeline or one of the modules, a plurality of corresponding sensors, valves, controllers and other devices can be arranged to realize the monitoring and control of the insulating gas purification process.
In this embodiment, the initial first preset rate and the initial second preset rate may be given smaller values, and it should be preferentially ensured that the pressure does not exceed the alarm limit, and after the first cycle is completed, the optimal values of the first preset rate and the second preset rate in the second cycle process may be determined according to the gas loss of the first cycle gas storage module 13 and the loss-rate control curve stored in advance, and then the insulating gas online purification apparatus 1 is controlled according to the optimal values to complete the cycle process, and the next cycle process is entered.
In this embodiment, the loss-rate control curve may be obtained through a large number of experiments performed in advance, a fixed gas loss amount is set in each experiment, a cycle process is respectively completed according to different cycle rates on the basis that the gas loss amount does not exceed the alarm limit, and the maximum rates of the inspiration process and the expiration process are used as the optimal values of the first preset rate and the second preset rate. After a large number of experiments, a loss-rate control curve can be obtained to ensure that the maximum purification rate is always kept on the basis of not exceeding the alarm limit, thereby realizing the accurate control of the purification of the insulating gas.
In this embodiment, the online insulating gas purification device 1 includes a monitoring module 11, an online purification processing module 12, a gas storage module 13, and a control module 14; the control module 14 is used for executing an inhalation process and an exhalation process in a circulating manner until the gas quality of the electrical equipment is detected to be qualified; the control module 14 is further configured to calculate a gas loss after each cycle is ended according to the pressure of the gas storage module 13, and correct a first preset rate and a second preset rate of a next cycle according to the gas loss of each cycle and a pre-stored loss-rate control curve; the loss-rate control curve represents the optimal values of the first preset rate and the second preset rate at each gas loss. Through the first preset speed and the second preset speed which are continuously corrected, the accurate control of the pressure of the insulating gas in the electrical equipment can be realized, and the pressure in the purification process is effectively prevented from exceeding an alarm limit value.
In some embodiments, the online insulating gas purification apparatus 1 further includes: a temperature sensor; the temperature sensor is connected with the control module 14; the control module 14 stores loss-rate control curves at different temperatures; the temperature sensor is used for measuring the ambient temperature; the control module 14 is also configured to select a loss-rate control curve based on the ambient temperature measured by the temperature sensor.
Because the temperature has obvious influence on the pressure of the gas, in the embodiment, the temperature sensor is arranged to measure the ambient temperature, so that the control error caused by the change of the ambient temperature can be avoided, and the accurate control on the pressure of the insulating gas is realized.
Fig. 2 is a schematic structural diagram of an online insulating gas purification apparatus according to another embodiment of the present invention. As shown in fig. 2, in some embodiments, the control module 14 includes an adjustable mass flow meter; the control device 14 is arranged to adjust the gas mass flow rate of the inspiration process by means of the adjustable mass flow meter to achieve control of the first preset rate and to adjust the gas mass flow rate of the expiration process by means of the adjustable mass flow meter to achieve control of the second preset rate.
In this embodiment, the adjustable mass flow meter is provided with a display instrument for displaying the mass flow of the insulating gas flowing through the adjustable mass flow meter. The control module 14 stores a corresponding relationship or curve between flow rate and pressure change, so as to precisely control the pressure change by controlling the flow rate change.
In this embodiment, the monitoring module 11 may be a pressure sensor, and the gas storage module 13 may be a storage tank.
In some embodiments, the online insulating gas purification apparatus 1 further comprises a first three-way valve and a second three-way valve;
the first three-way valve is respectively connected with the electrical equipment, the output end of the gas storage module and the first end of the adjustable mass flowmeter;
the second three-way valve is respectively connected with the electrical equipment, the input end of the online purification treatment module and the second end of the adjustable mass flowmeter;
the output end of the online purification treatment module is connected with the input end of the gas storage module; the first three-way valve and the second three-way valve are controlled by the control module.
In this embodiment, the electrical device is connected to the a-end of the first three-way valve; the end c of the first three-way valve is connected with the first end of the adjustable mass flowmeter; the second end of the adjustable mass flowmeter is connected with the e end of the second three-way valve; the d end of the second three-way valve is connected with the online purification module; the online purification module is connected with the storage tank; the storage tank is connected with the end b of the first three-way valve; the f end of the second three-way valve is connected with electrical equipment; the controller is respectively connected with the first three-way valve, the second three-way valve and the adjustable mass flowmeter;
when the insulating gas flows from the electrical equipment to the storage tank, the conduction direction of the first three-way valve and the second three-way valve is ac-ed; when the insulating gas flows from the storage tank to the electrical equipment, the conduction direction of the first three-way valve and the second three-way valve is bc-ef.
In this embodiment, through two three-way valves and corresponding pipeline setting, can realize only using the flow control that an adjustable mass flowmeter realized inspiration process and expiration process, save device cost and volume.
In some embodiments, the online insulating gas purification device 1 further comprises a sampling detection module;
the sampling detection module is arranged between the first three-way valve and the second three-way valve; the sampling detection module is connected with the control module; the sampling detection module is used for respectively sampling and detecting the insulating gas sucked in the air suction process so as to determine the impurity composition condition of the internal insulating gas of the electrical equipment and report the impurity composition condition to the control module;
a plurality of types of adsorbents are arranged in the online purification treatment module 12;
the control module 14 is used for instructing the online purification treatment module 12 to select the corresponding adsorbent according to the impurity composition condition.
In this embodiment, the detection principle of the sampling detection module may include, but is not limited to, at least one of the following: gas detection tube method, gas chromatography, electrochemical sensor method, sonic densitometer method, point decomposition method, condensation dew point method, resistance capacitance method, and the like, but are not limited thereto. The adsorbent may include, but is not limited to, at least one of the following: molecular sieve, activated alumina, soda lime, and activated carbon, which are not limited herein. Each adsorbent is different to the adsorption effect of impurity, selects corresponding adsorbent to carry out purification treatment according to the testing result of sampling detection module, can effectively improve purification efficiency.
In some embodiments, the sampling detection module is further configured to perform sampling detection on the insulating gas refilled in the exhalation process respectively to determine an impurity purification condition and report the impurity purification condition to the control module;
the control module 14 is used for determining the operation state of the insulating gas online purification device 1 according to the impurity purification situation.
In this embodiment, when the online purifying apparatus 1 for insulating gas has a fault (for example, the adsorbent needs to be replaced), the insulating gas cannot be effectively purified, which results in impurities in the insulating gas refilled during the exhalation process. When the sampling detection module detects impurities in the exhalation process, the control module changes the running state of the device into a fault, reports the fault and waits for maintenance.
In some embodiments, the monitoring module includes a first pressure sensor connected to the electrical equipment, a second pressure sensor, a third pressure sensor, and a fourth pressure sensor connected to the gas storage module;
the first pressure sensor, the second pressure sensor and the third pressure sensor are all used for measuring the pressure of insulating gas in the electrical equipment; the fourth pressure sensor is used for measuring the pressure of the insulating gas in the gas storage module.
In this embodiment, the first pressure sensor, the second pressure sensor, and the third pressure sensor are P1, P2, and PG1 shown in fig. 2, which may be three different types of pressure sensors, and the three types of pressure sensors collectively measure the pressure of the insulating gas in the electrical apparatus. Through the redundant measurement, the pressure can be effectively prevented from exceeding the limit value, so that accurate control is realized. A fourth pressure sensor (not shown) may be provided at the inlet or outlet end of the storage tank.
In some embodiments, the online insulating gas purifying device 1 further comprises a pressure regulating valve, a fifth pressure sensor, a first electromagnetic valve, a second electromagnetic valve;
the pressure regulating valve is arranged at the output end of the gas storage module; the fifth pressure sensor is used for detecting the pressure of the gas in the pipeline after being adjusted by the pressure adjusting valve;
the first electromagnetic valve and the second electromagnetic valve are controlled by control equipment; the first electromagnetic valve is arranged between the electrical equipment and the first three-way valve; the second electromagnetic valve is arranged between the pressure regulating valve and the first three-way valve.
In the present embodiment, the control device controls the inhalation process and the exhalation process through the pressure regulating valve, the first electromagnetic valve, and the second electromagnetic valve (e.g., V1 and V2 shown in fig. 2). The fifth pressure sensor (PG 2 shown in fig. 2) is used to detect the pressure of the gas in the pipeline adjusted by the pressure regulating valve, and report the pressure to the control module.
The gas flow during the purification process is described below by way of an example of implementation, and is not intended to be limiting.
In the embodiment, when the non-power-off breathing type sulfur hexafluoride gas purification treatment is carried out, the electromagnetic valve V1 is opened, the online purification module executes an inspiration process (electric three-way valve ac-ed pass), the flow rate of the gas is adjusted through the adjustable mass flow meter to control the pressure in the electrical equipment during inspiration to be instantaneously reduced to an alarm limit value, when the proper rate is reduced to a set minimum limit value, the electromagnetic valve V1 is automatically closed, then an expiration process (electric three-way valve bc-ef pass) is executed, the electromagnetic valves V2 and V1 are automatically opened, sulfur hexafluoride gas is expired from the gas storage tank, the flow rate of the gas is adjusted through the adjustable mass flow meter to control the pressure in the electrical equipment during expiration to be instantaneously increased to exceed the set maximum limit value, when the proper rate is increased to the set maximum limit value, the electromagnetic valves V1 and V2 are automatically closed, and the online purification module executes the air suction flow, and the air suction flow is circulated and repeated until the quality of the gas is detected to be qualified, so that the electrified insulation pressure of sulfur hexafluoride (SF6) equipment is realized, and the sulfur hexafluoride is accurately controlled in a proper range during purification treatment.
Fig. 3 is a schematic structural diagram of an online insulating gas purification system according to an embodiment of the present invention. In this embodiment, the on-line insulation gas purification system 3 includes: at least one online insulating gas purification device 31 and a control center 32 as shown in any of the above embodiments; each insulating gas on-line purification device 31 is connected with one electrical device 30; the control center 32 is connected to each of the insulating gas on-line purification devices 31.
In this embodiment, the electrical device 30 may be a transformer, a circuit breaker, a gas insulated metal enclosed switchgear, a transformer, and the like, which are not limited herein. The control center 32 may be a computer, a notebook, a single chip, or other computing devices, or may be a physical server, a server cluster, a cloud server, or other devices, which is not limited herein. The electrical equipment 30 and the insulating gas on-line purification device 31 are connected by a pipeline, and the insulating gas on-line purification device 31 and the control center may be connected by a circuit or a network, which is not limited herein. The online insulating gas purification device 31 may periodically purify the insulating gas in the electrical equipment 30, or may purify the insulating gas in the electrical equipment 30 after receiving a command from the control center, which is not limited herein.
In some embodiments, the control center 32 is configured to send a purge command to any of the online insulating gas purging devices 31 connected thereto;
the on-line insulating gas purifying device 31 is used for performing purification treatment on the insulating gas in the connected electrical equipment 30 after receiving a purification command;
the control center 32 is also used for receiving the operation state sent by each insulating gas on-line purification device 31.
In this embodiment, the control center may monitor the electrical device through other devices, and issue a purification instruction to the corresponding online insulating gas purification device 31 when monitoring that the content of the insulating gas impurities in the electrical device exceeds the preset content. The control center 32 receives the running states sent by the insulating gas online purification devices 31 in real time to monitor the insulating gas online purification devices 31, and alarms when a certain insulating gas online purification device 31 fails to work, so that related personnel are reminded to overhaul.
It should be understood that, the sequence numbers of the steps in the foregoing embodiments do not imply an execution sequence, and the execution sequence of each process should be determined by its function and inherent logic, and should not constitute any limitation to the implementation process of the embodiments of the present invention.
It will be apparent to those skilled in the art that, for convenience and brevity of description, only the above-mentioned division of the functional units and modules is illustrated, and in practical applications, the above-mentioned function distribution may be performed by different functional units and modules according to needs, that is, the internal structure of the apparatus is divided into different functional units or modules, so as to perform all or part of the functions described above. Each functional unit and module in the embodiments may be integrated in one processing unit, or each unit may exist alone physically, or two or more units are integrated in one unit, and the integrated unit may be implemented in a form of hardware, or in a form of software functional unit. In addition, specific names of the functional units and modules are only for convenience of distinguishing from each other, and are not used for limiting the protection scope of the present application. The specific working processes of the units and modules in the system may refer to the corresponding processes in the foregoing method embodiments, and are not described herein again.
In the above embodiments, the descriptions of the respective embodiments have respective emphasis, and reference may be made to the related descriptions of other embodiments for parts that are not described or illustrated in a certain embodiment.
Those of ordinary skill in the art will appreciate that the various illustrative elements and algorithm steps described in connection with the embodiments disclosed herein may be implemented as electronic hardware or combinations of computer software and electronic hardware. Whether such functionality is implemented as hardware or software depends upon the particular application and design constraints imposed on the implementation. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present invention.
In the embodiments provided in the present invention, it should be understood that the disclosed apparatus/terminal and method may be implemented in other ways. For example, the above-described apparatus/terminal embodiments are merely illustrative, and for example, a module or a unit may be divided into only one logical function, and may be implemented in other ways, for example, a plurality of units or components may be combined or integrated into another system, or some features may be omitted or not executed. In addition, the shown or discussed mutual coupling or direct coupling or communication connection may be an indirect coupling or communication connection through some interfaces, devices or units, and may be in an electrical, mechanical or other form.
Units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of the embodiment.
In addition, functional units in the embodiments of the present invention may be integrated into one processing unit, or each unit may exist alone physically, or two or more units are integrated into one unit. The integrated unit can be realized in a form of hardware, and can also be realized in a form of a software functional unit.
The integrated modules/units, if implemented in the form of software functional units and sold or used as separate products, may be stored in a computer readable storage medium. Based on such understanding, all or part of the flow in the method according to the embodiments of the present invention may also be implemented by a computer program to instruct related hardware, where the computer program may be stored in a computer readable storage medium, and when the computer program is executed by a processor, the computer program may implement the steps of the embodiments of the method. Wherein the computer program comprises computer program code, which may be in the form of source code, object code, an executable file or some intermediate form, etc. The computer readable medium may include: any entity or device capable of carrying computer program code, recording medium, U.S. disk, removable hard disk, magnetic disk, optical disk, computer Memory, Read-Only Memory (ROM), Random Access Memory (RAM), electrical carrier wave signals, telecommunications signals, software distribution media, and the like. It should be noted that the computer readable medium may include any suitable increase or decrease as required by legislation and patent practice in the jurisdiction, for example, in some jurisdictions, computer readable media may not include electrical carrier signals and telecommunications signals in accordance with legislation and patent practice.
The above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; such modifications and substitutions do not substantially depart from the spirit and scope of the embodiments of the present invention, and are intended to be included within the scope of the present invention.
Claims (10)
1. An online insulating gas purification apparatus for purifying an insulating gas of an electrical device in operation, comprising: the system comprises a monitoring module, an online purification treatment module, a gas storage module and a control module;
the monitoring module is used for monitoring the pressure of the insulating gas in the electrical equipment and reporting the pressure to the control module;
the online purification treatment module is used for purifying the insulating gas sucked from the electrical equipment in the air suction process of the device and storing the insulating gas into the gas storage module;
the gas storage module is used for recharging the stored insulating gas into the electrical equipment during the exhalation process of the device;
the control module is used for circularly executing the inspiration process and the expiration process until the gas quality of the electrical equipment is detected to be qualified;
the inspiration process comprises: sucking insulating gas from the electrical equipment at a first preset rate to reduce the pressure of the electrical equipment to a minimum value;
the exhalation process comprises: refilling insulating gas into the electrical equipment according to a second preset speed so as to increase the pressure of the electrical equipment to a maximum value;
the monitoring module is also used for monitoring the pressure of the gas storage module and reporting the pressure to the control module;
the control module is also used for calculating the gas loss after each circulation according to the pressure of the gas storage module, and correcting a first preset rate and a second preset rate of the next circulation according to the gas loss of each circulation and a pre-stored loss-rate control curve;
the loss-rate control curve represents the optimal values of the first preset rate and the second preset rate for each gas loss.
2. The online insulating gas purifying apparatus according to claim 1, further comprising: a temperature sensor; the temperature sensor is connected with the control module; the control module stores loss-rate control curves at different temperatures; the temperature sensor is used for measuring the ambient temperature; the control module is also used for selecting a loss-rate control curve according to the ambient temperature measured by the temperature sensor.
3. The online insulating gas purification device according to claim 1, wherein the control module comprises an adjustable mass flow meter; the control equipment is used for adjusting the gas mass flow of the inspiration process through the adjustable mass flow meter so as to realize the control of the first preset speed, and adjusting the gas mass flow of the expiration process through the adjustable mass flow meter so as to realize the control of the second preset speed.
4. The on-line insulation gas purification device according to claim 3, further comprising a first three-way valve and a second three-way valve;
the first three-way valve is respectively connected with the electrical equipment, the output end of the gas storage module and the first end of the adjustable mass flow meter;
the second three-way valve is respectively connected with the electrical equipment, the input end of the online purification treatment module and the second end of the adjustable mass flowmeter;
the output end of the online purification treatment module is connected with the input end of the gas storage module; the first and second three-way valves are controlled by the control module.
5. The online insulating gas purifying device according to claim 4, further comprising a sampling detection module;
the sampling detection module is arranged between the first three-way valve and the second three-way valve; the sampling detection module is connected with the control module; the sampling detection module is used for respectively sampling and detecting the insulating gas sucked in the air suction process so as to determine the impurity composition condition of the insulating gas in the electrical equipment and report the impurity composition condition to the control module;
a plurality of types of adsorbents are arranged in the online purification treatment module;
the control module is used for indicating the online purification treatment module to select corresponding adsorbents according to the impurity composition condition.
6. The online insulating gas purifying device according to claim 5, wherein the sampling detection module is further configured to perform sampling detection on the insulating gas recharged in the expiration process respectively to determine impurity purification conditions and report the impurity purification conditions to the control module;
and the control module is used for determining the running state of the insulating gas online purification device according to the impurity purification condition.
7. The online insulating gas purification apparatus according to any one of claims 1 to 6, wherein the monitoring module comprises a first pressure sensor, a second pressure sensor, a third pressure sensor connected to the electrical equipment, and a fourth pressure sensor connected to the gas storage module;
the first pressure sensor, the second pressure sensor and the third pressure sensor are all used for measuring the pressure of the insulating gas in the electrical equipment; the fourth pressure sensor is for measuring a pressure of an insulating gas within the gas storage module.
8. The online insulating gas purifying device according to any one of claims 1 to 6, wherein the device further comprises a pressure regulating valve, a fifth pressure sensor, a first solenoid valve, a second solenoid valve;
the pressure regulating valve is arranged at the output end of the gas storage module; the fifth pressure sensor is used for detecting the pressure of the gas in the pipeline adjusted by the pressure adjusting valve;
the first solenoid valve and the second solenoid valve are controlled by the control equipment; the first electromagnetic valve is disposed between the electrical equipment and the first three-way valve; the second electromagnetic valve is provided between the pressure regulating valve and the first three-way valve.
9. An online insulating gas purification system, comprising: at least one online insulating gas cleaning device according to any one of claims 1 to 8 and a control center; each insulating gas online purification device is connected with one electrical device; and the control center is respectively connected with each insulating gas online purification device.
10. The online insulating gas purifying system according to claim 9, wherein the control center is configured to send a purifying command to any online insulating gas purifying device connected thereto;
the online insulating gas purification device is used for purifying the insulating gas in the connected electrical equipment after receiving the purification instruction;
and the control center is also used for receiving the running state sent by each insulating gas online purification device.
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