CN108930912B - Automatic nitrogen charging method, device and system for stator - Google Patents

Automatic nitrogen charging method, device and system for stator Download PDF

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Publication number
CN108930912B
CN108930912B CN201810798926.8A CN201810798926A CN108930912B CN 108930912 B CN108930912 B CN 108930912B CN 201810798926 A CN201810798926 A CN 201810798926A CN 108930912 B CN108930912 B CN 108930912B
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China
Prior art keywords
nitrogen
stator
value
pressure value
purity
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CN201810798926.8A
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CN108930912A (en
Inventor
王珂
赵世斌
王威
刘桂川
于洋
赵子成
任德江
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Shenhua Fuzhou Luoyuan Bay Electric Co ltd
China Shenhua Energy Co Ltd
Shenhua Fujian Energy Co Ltd
Original Assignee
Shenhua Fuzhou Luoyuan Bay Electric Co ltd
China Shenhua Energy Co Ltd
Shenhua Fujian Energy Co Ltd
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Priority to CN201810798926.8A priority Critical patent/CN108930912B/en
Publication of CN108930912A publication Critical patent/CN108930912A/en
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C5/00—Methods or apparatus for filling containers with liquefied, solidified, or compressed gases under pressures
    • F17C5/06—Methods or apparatus for filling containers with liquefied, solidified, or compressed gases under pressures for filling with compressed gases
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C13/00—Details of vessels or of the filling or discharging of vessels
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C13/00—Details of vessels or of the filling or discharging of vessels
    • F17C13/02—Special adaptations of indicating, measuring, or monitoring equipment
    • F17C13/025—Special adaptations of indicating, measuring, or monitoring equipment having the pressure as the parameter
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C13/00—Details of vessels or of the filling or discharging of vessels
    • F17C13/02—Special adaptations of indicating, measuring, or monitoring equipment
    • F17C13/026—Special adaptations of indicating, measuring, or monitoring equipment having the temperature as the parameter
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2201/00—Vessel construction, in particular geometry, arrangement or size
    • F17C2201/05—Size
    • F17C2201/056—Small (<1 m3)
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2221/00—Handled fluid, in particular type of fluid
    • F17C2221/01—Pure fluids
    • F17C2221/014—Nitrogen
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2223/00—Handled fluid before transfer, i.e. state of fluid when stored in the vessel or before transfer from the vessel
    • F17C2223/01—Handled fluid before transfer, i.e. state of fluid when stored in the vessel or before transfer from the vessel characterised by the phase
    • F17C2223/0107—Single phase
    • F17C2223/0123—Single phase gaseous, e.g. CNG, GNC
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2250/00—Accessories; Control means; Indicating, measuring or monitoring of parameters
    • F17C2250/04—Indicating or measuring of parameters as input values
    • F17C2250/0404—Parameters indicated or measured
    • F17C2250/043—Pressure
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2250/00—Accessories; Control means; Indicating, measuring or monitoring of parameters
    • F17C2250/04—Indicating or measuring of parameters as input values
    • F17C2250/0404—Parameters indicated or measured
    • F17C2250/0439—Temperature
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2250/00—Accessories; Control means; Indicating, measuring or monitoring of parameters
    • F17C2250/07—Actions triggered by measured parameters
    • F17C2250/072—Action when predefined value is reached
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2270/00—Applications
    • F17C2270/05—Applications for industrial use

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Manufacture Of Motors, Generators (AREA)

Abstract

The invention discloses an automatic nitrogen charging method, device and system for a stator. Wherein, this system includes: a stator; monitoring equipment, be connected with above-mentioned stator for monitor the target parameter of nitrogen gas in above-mentioned stator, wherein, above-mentioned target parameter includes: a nitrogen purity value; and the controller is connected with the monitoring equipment and is used for determining whether the stator is filled with the nitrogen according to the nitrogen purity value, wherein the stator is determined to be filled with the nitrogen under the condition that the nitrogen purity value is smaller than a nitrogen purity threshold value. The invention solves the technical problems of large workload and difficulty in stator maintenance caused by manually collecting the maintenance parameters of the stator and manually filling nitrogen into the stator in the prior art.

Description

Automatic nitrogen charging method, device and system for stator
Technical Field
The invention relates to the field of maintenance of a generator stator, in particular to an automatic nitrogen charging method, device and system for a stator.
Background
The stator of the generator (stator for short) has a long-term maintenance requirement in the production field to ensure that the equipment is not corroded and damped. In the prior art, the stator maintenance mainly adopts methods of filling nitrogen in a stator winding water channel and drying in a stator chamber, namely, draining water stored in the stator winding water channel, blowing out residual water in the winding water channel for many times by using compressed air, pumping out the water still accumulated in the stator winding water channel which is difficult to blow out by using a vacuumizing method, and finally sealing a water inlet and outlet flange of the stator winding water channel and then filling nitrogen for maintenance; nitrogen is filled in the stator chamber, and a drying agent is placed in the stator chamber, so that the winding is prevented from being damped due to dewing in the chamber.
However, in the above maintenance method in the prior art, a specially-assigned person needs to patrol the maintenance parameters of the stator every day, and record the change of the nitrogen pressure inside the stator, for example, the nitrogen pressure is too low and the nitrogen needs to be manually filled. If the humidity in the stator exceeds the standard, nitrogen is required to be emptied, the drying agent is replaced, and then nitrogen is charged again, so that the workload and the difficulty of maintenance are increased.
Aiming at the problems that the maintenance parameters of the stator need to be manually collected and the stator is manually filled with nitrogen to cause the workload and difficulty of stator maintenance are large in the prior art, an effective solution is not provided at present.
Disclosure of Invention
The embodiment of the invention provides an automatic nitrogen filling method, device and system for a stator, which are used for at least solving the technical problems that in the prior art, the maintenance parameters of the stator need to be manually collected, and the stator needs to be manually filled with nitrogen, so that the workload and difficulty for maintaining the stator are high.
According to an aspect of an embodiment of the present invention, there is provided an automatic nitrogen charging system for a stator, including: a stator; monitoring equipment, be connected with above-mentioned stator for monitor the target parameter of nitrogen gas in above-mentioned stator, wherein, above-mentioned target parameter includes: a nitrogen purity value; and the controller is connected with the monitoring equipment and is used for determining whether the stator is filled with the nitrogen according to the nitrogen purity value, wherein the stator is determined to be filled with the nitrogen under the condition that the nitrogen purity value is smaller than a nitrogen purity threshold value.
Further, the target parameters further include: a first nitrogen pressure value in the stator; the above system further comprises: the first pressure transmitter is connected with the stator and used for acquiring a first nitrogen pressure value in the stator and outputting the first nitrogen pressure value to the controller; the controller is further connected with the first pressure transmitter, and is configured to determine that the stator is filled with the nitrogen gas when the first nitrogen gas pressure value is smaller than a first predetermined pressure value.
Further, the above system further comprises: the second pressure transmitter is connected with the nitrogen cylinder and used for acquiring a second nitrogen pressure value in the nitrogen cylinder and outputting the second nitrogen pressure value to the controller; and the controller is also connected with the second pressure transmitter and is used for outputting prompt information for prompting a user to replace the nitrogen cylinder under the condition that the second nitrogen pressure value is smaller than a second preset pressure value.
Further, the above system further comprises: the temperature transmitter is connected with the stator and used for detecting the temperature value of the nitrogen in the stator and outputting the temperature value to the controller; a heater connected to the stator for heating the nitrogen gas in the stator; the controller is also connected with the temperature transmitter and the heater and is used for controlling the heater to carry out temperature rise processing on the nitrogen in the stator under the condition that the temperature value is smaller than a temperature threshold value.
Further, the above system further comprises: the humidity detector is connected with the stator and used for detecting the humidity value of the nitrogen in the stator; a dryer connected to the stator for drying the nitrogen gas; the controller is also connected with the humidity detector and is used for controlling the dryer to dry the nitrogen under the condition that the humidity value is greater than the humidity threshold value.
Further, the above system further comprises: a megohmmeter connected to the stator for detecting the insulation resistance of the stator winding; the controller is further connected to the megohmmeter, and is configured to control the dryer to dry the nitrogen gas when the insulation resistance value is smaller than a resistance threshold value.
Further, the above system further comprises: the display equipment is connected with the controller and used for displaying the parameter data of the stator; and the memory is connected with the controller and is used for storing the parameter data of the stator.
Further, the above system further comprises: the nitrogen cylinder is used for storing nitrogen; the stator further includes: and the nitrogen filling port is connected with a nitrogen cylinder and is used for transmitting the nitrogen in the nitrogen cylinder to the interior of the stator.
According to another aspect of the embodiments of the present invention, there is also provided an automatic nitrogen charging method for a stator, including: monitoring a target parameter of nitrogen in the stator; and determining whether to fill the stator with nitrogen according to the target parameter.
Further, the target parameters include: a nitrogen purity value; determining whether to fill the stator with nitrogen according to the target parameter includes: receiving the nitrogen purity value sent by monitoring equipment; comparing the nitrogen purity value with the nitrogen purity threshold value; and determining that the stator is filled with the nitrogen gas when the nitrogen gas purity value is smaller than the nitrogen gas purity threshold value.
Further, the target parameters include: a first nitrogen pressure value in the stator; determining whether to fill the stator with nitrogen according to the target parameter includes: receiving the first nitrogen pressure value sent by the first pressure transmitter; comparing the first nitrogen pressure value with a first preset pressure value; and determining that the stator is filled with the nitrogen gas when the first nitrogen gas pressure value is smaller than the first preset pressure value.
Further, prior to or while monitoring the target parameter of the nitrogen gas in the stator, the method further comprises: monitoring a second nitrogen pressure value in the nitrogen cylinder; comparing the second nitrogen pressure value with a second preset pressure value; and outputting prompt information for prompting a user to replace the nitrogen cylinder under the condition that the second nitrogen pressure value is smaller than the second preset pressure value.
Further, before determining whether to fill the stator with nitrogen gas according to the target parameter, the method further includes: carrying out an air tightness test on the stator; and performing a pressure maintaining test on the stator when the airtight test of the stator is qualified.
According to another aspect of the embodiments of the present invention, there is also provided an automatic nitrogen charging apparatus for a stator, including: the monitoring module is used for monitoring target parameters of nitrogen in the stator; and the determining module is used for determining whether to fill the stator with nitrogen according to the target parameters.
According to another aspect of the embodiments of the present invention, there is also provided a storage medium, where the storage medium includes a stored program, and when the program runs, the apparatus where the storage medium is located is controlled to perform the following steps: monitoring a target parameter of nitrogen in the stator; and determining whether to fill the stator with nitrogen according to the target parameter.
According to another aspect of the embodiments of the present invention, there is also provided a processor, configured to execute a program, where the program executes the following steps: monitoring a target parameter of nitrogen in the stator; and determining whether to fill the stator with nitrogen according to the target parameter.
In an embodiment of the invention, the stator is used; monitoring equipment, be connected with above-mentioned stator for monitor the target parameter of nitrogen gas in above-mentioned stator, wherein, above-mentioned target parameter includes: a nitrogen purity value; and the controller is connected with the monitoring equipment and is used for determining whether the stator is filled with the nitrogen according to the nitrogen purity value, wherein the stator is determined to be filled with the nitrogen under the condition that the nitrogen purity value is smaller than a nitrogen purity threshold value.
Based on the above-mentioned embodiment of this application, reached the maintenance parameter of automatic acquisition stator to whether confirm the purpose of filling nitrogen gas for the stator according to the maintenance parameter automatically, thereby realized alleviateing the technical effect of the maintenance work load and the maintenance degree of difficulty of stator, and then solved the maintenance parameter that needs artifical collection stator among the prior art, and artifical filling nitrogen gas for the stator, lead to the work load and the great technical problem of the degree of difficulty of maintenance stator.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the invention and together with the description serve to explain the invention without limiting the invention. In the drawings:
fig. 1 is a schematic structural diagram of an automatic nitrogen charging system for a stator according to an embodiment of the invention;
FIG. 2 is a schematic diagram of an alternative stator automatic nitrogen charging system according to an embodiment of the present invention;
FIG. 3 is a flow chart of a method of automatically charging a stator with nitrogen in accordance with an embodiment of the present invention; and
fig. 4 is a schematic structural diagram of an automatic nitrogen charging device of a stator according to an embodiment of the invention.
Detailed Description
In order to make the technical solutions of the present invention better understood, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
It should be noted that the terms "first," "second," and the like in the description and claims of the present invention and in the drawings described above are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used is interchangeable under appropriate circumstances such that the embodiments of the invention described herein are capable of operation in sequences other than those illustrated or described herein. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed, but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.
First, in order to facilitate understanding of the embodiments of the present invention, some terms or nouns referred to in the present invention will be explained as follows:
a stator: is one of the key parts of the generator, is the stationary part of the generator, and comprises: iron core, base, coil, etc.; the rotor rotates inside or around the stator, generating a rotating magnetic field.
The pressure transmitter: it refers to a pressure sensor with output as standard signal, and can also be understood as a meter which receives pressure variable and converts it proportionally into standard output signal.
A temperature transmitter: the instrument for converting temperature variable into standard output signal is mainly used for measuring and controlling temperature parameter in industrial process, and mainly converts signal of temperature sensor into current signal and inputs it into instrument to display temperature.
Example 1
According to an embodiment of the present invention, there is provided a system embodiment for implementing an automatic nitrogen charging method for a stator, and fig. 1 is a schematic structural diagram of an automatic nitrogen charging system for a stator according to an embodiment of the present invention, as shown in fig. 1, the automatic nitrogen charging system for a stator includes: a stator 10, a monitoring device 12, and a controller 14, wherein:
a stator 10; a monitoring device 12 connected to the stator 10 for monitoring a target parameter of nitrogen in the stator, wherein the target parameter includes: a nitrogen purity value; and a controller 14 connected to the monitoring device 12, for determining whether to fill the stator with nitrogen gas according to the nitrogen gas purity value, wherein if the nitrogen gas purity value is smaller than a nitrogen gas purity threshold, it is determined that the stator is filled with nitrogen gas.
In an alternative embodiment, the stator 10 is a stationary part of the machine, with the rotor rotating inside or around the stator, in this embodiment the stator 10 may preferably be the stator in a generator.
In the embodiment of the present application, in the case that the target parameter is a nitrogen purity value, the monitoring device 12 may be a nitrogen purity detector for monitoring the nitrogen purity value of the nitrogen in the stator.
It should be noted that the nitrogen purity mainly refers to the content of non-nitriding gas, and the nitrogen purity value can be expressed in unit% (volume content of nitrogen) or unit ppm (parts per million), ppb (parts per billion) of oxygen, and in the embodiment of the present application, the unit% can be used as an example for illustration.
In order to better maintain the stator and alleviate the maintenance requirement affected by too low nitrogen purity, in this embodiment of the present application, the threshold value of nitrogen purity may be 99.9%, when the value of nitrogen purity is less than (or understood to be lower than) the threshold value of nitrogen purity of 99.9%, it indicates that the current value of nitrogen purity is not qualified, and it is difficult to meet the maintenance requirement of the stator, it is determined that the stator needs to be filled with the nitrogen gas, and in an optional embodiment, the user may be prompted to increase the value of nitrogen purity of the nitrogen gas to the threshold value of nitrogen purity of 99.9% by outputting an alarm message or a prompt message to prompt the user to fill and discharge the nitrogen gas.
In an embodiment of the invention, the stator is used; monitoring equipment, be connected with above-mentioned stator for monitor the target parameter of nitrogen gas in above-mentioned stator, wherein, above-mentioned target parameter includes: a nitrogen purity value; and the controller is connected with the monitoring equipment and is used for determining whether the stator is filled with the nitrogen according to the nitrogen purity value, wherein the stator is determined to be filled with the nitrogen under the condition that the nitrogen purity value is smaller than a nitrogen purity threshold value.
Based on the above-mentioned embodiment of this application, reached the maintenance parameter of automatic acquisition stator to whether confirm the purpose of filling nitrogen gas for the stator according to the maintenance parameter automatically, thereby realized alleviateing the technical effect of the maintenance work load and the maintenance degree of difficulty of stator, and then solved the maintenance parameter that needs artifical collection stator among the prior art, and artifical filling nitrogen gas for the stator, lead to the work load and the great technical problem of the degree of difficulty of maintenance stator.
In an alternative embodiment, fig. 2 is a schematic structural diagram of an alternative stator automatic nitrogen charging system according to an embodiment of the present invention, as shown in fig. 2, the system includes: besides the stator 10 and the controller 14, wherein the stator 10 and the controller 14 are connected to each other, the method may further include: the following description of the above alternative embodiments is made by using various specific embodiments of a first pressure transmitter 20, a second pressure transmitter 22, a temperature transmitter 24, a moisture detector 26, a megger 28, a display device 30, and a nitrogen gas cylinder 32, and it should be noted that the above system further includes: the nitrogen purity detector, the storage, the heater, the dryer and the stator further comprise a nitrogen charging port and the like, and the attached drawings 1 and 2 are only used as alternative embodiments and are not drawn in the attached drawings 1 and 2, and the connection relationship recorded in the specification shall be subject to the standard.
In an optional embodiment, the target parameter further includes: a first nitrogen pressure value in the stator; the above system further comprises: the first pressure transmitter is connected with the stator and used for acquiring a first nitrogen pressure value in the stator and outputting the first nitrogen pressure value to the controller; the controller is further connected with the first pressure transmitter, and is configured to determine that the stator is filled with the nitrogen gas when the first nitrogen gas pressure value is smaller than a first predetermined pressure value.
In an alternative embodiment, the first pressure transmitter may be an online pressure transmitter, connected to the stator, for monitoring a first nitrogen pressure value in the stator, which may be, but is not limited to, characterizing a nitrogen charging pressure in the stator, and the first predetermined pressure value may be, but is not limited to, set to 2 kPa. When the first nitrogen pressure value is reduced to be lower than a first preset pressure value of 2kPa, namely under the condition that the first nitrogen pressure value is smaller than the first preset pressure value, the controller controls the automatic control nitrogen filling system to timely supplement nitrogen for the stator, so that the first nitrogen pressure value in the stator reaches the first preset pressure value of 2 kPa.
As an alternative embodiment, a voltage transformer may be used to replace the first pressure transmitter, so as to implement the functions implemented by the first pressure transmitter.
In an optional embodiment, the system further includes: the second pressure transmitter is connected with the nitrogen cylinder and used for acquiring a second nitrogen pressure value in the nitrogen cylinder and outputting the second nitrogen pressure value to the controller; and the controller is also connected with the second pressure transmitter and is used for outputting prompt information for prompting a user to replace the nitrogen cylinder under the condition that the second nitrogen pressure value is smaller than a second preset pressure value.
In an alternative embodiment, the second pressure transmitter may be an online pressure transmitter connected to the nitrogen cylinder for monitoring a second pressure value of nitrogen gas in the nitrogen cylinder, the second pressure value may be, but is not limited to being, indicative of the pressure of nitrogen gas in the nitrogen cylinder, and the second predetermined pressure value may be, but is not limited to being, set to 10 kPa. When the second nitrogen pressure value is reduced to be lower than a second preset pressure value of 10kPa, namely under the condition that the second nitrogen pressure value is smaller than the second preset pressure value, the controller controls the automatic control nitrogen charging system to alarm and output prompt information for prompting a user to replace the nitrogen cylinder with sufficient nitrogen, so that the second nitrogen pressure value in the nitrogen cylinder reaches the second preset pressure value of 10 kPa.
As an alternative embodiment, a voltage transformer may be used to replace the second pressure transmitter, so as to implement the functions implemented by the second pressure transmitter.
In an optional embodiment, the system further includes: the temperature transmitter is connected with the stator and used for detecting the temperature value of the nitrogen in the stator and outputting the temperature value to the controller; a heater connected to the stator for heating the nitrogen gas in the stator; the controller is also connected with the temperature transmitter and the heater and is used for controlling the heater to carry out temperature rise processing on the nitrogen in the stator under the condition that the temperature value is smaller than a temperature threshold value.
In an alternative embodiment of the present application, the temperature transmitter can be a thermocouple, a thermal resistor, or the like, and the output signal from the temperature measuring element is sent to the transmitter module and converted into a voltage signal of 0-5V/0-10V, which is a 4-20MA current signal in linear relation to the temperature.
In an alternative embodiment, the temperature threshold may be 5 ℃, and in a case that the temperature value is less than the temperature threshold, the heater is controlled to perform the temperature raising process on the nitrogen gas in the stator, and the temperature may be raised to 5 ℃ at the lowest.
Since the maintenance temperature value of the stator is generally required to be not lower than (higher than) 5 ℃ in the process of maintaining the stator, in the embodiment of the application, the maintenance temperature of the stator is maintained to be not lower than 5 ℃ by arranging the online temperature transmitter and controlling the nitrogen heater connected with the stator.
In an optional embodiment, the system further includes: the humidity detector is connected with the stator and used for detecting the humidity value of the nitrogen in the stator; a dryer connected to the stator for drying the nitrogen gas; the controller is also connected with the humidity detector and is used for controlling the dryer to dry the nitrogen under the condition that the humidity value is greater than the humidity threshold value.
In an alternative embodiment, but not limited to, the drying process of the nitrogen gas by the dryer can be realized by the following method: the dryer extracts the nitrogen gas in the stator for drying treatment, and fills the dried nitrogen gas into the stator.
In the embodiment of the present application, the humidity detector may be, but not limited to, an online humidity detector, connected to the stator, and configured to detect a humidity value of nitrogen in the stator; when the humidity value of the nitrogen (the dew point level of the nitrogen is 3, namely the pressure dew point is not higher than-20 ℃) is detected to be larger than the humidity threshold value, the controller can control the dryer of the automatic control nitrogen charging system to start, pump out the nitrogen in the stator, dry the pumped nitrogen and then send the nitrogen back to the stator, and in the embodiment of the application, after the humidity value reaches the humidity threshold value, the dryer stops running.
In an optional embodiment, the system further includes: a megohmmeter connected to the stator for detecting the insulation resistance of the stator winding; the controller is further connected to the megohmmeter, and is configured to control the dryer to dry the nitrogen gas when the insulation resistance value is smaller than a resistance threshold value.
In the above optional embodiment, the megohmmeter is a measuring instrument, and is used for detecting insulation resistance of electrical equipment, household appliances or electrical lines to the ground and between phases, so as to ensure that the equipment, the appliances or the lines are tracked in a normal state, and avoid accidents such as electric shock casualties and equipment damage.
In an embodiment of the present invention, the megohmmeter is connected to the stator and configured to detect an insulation resistance of the stator winding. Optionally, the resistance threshold may be 80M Ω, and when the insulation resistance value is smaller than the resistance threshold 80M Ω (converted to room temperature), it indicates that the stator is damp, the dryer of the nitrogen-filled protection system is automatically controlled to start, and nitrogen gas in the stator is pumped out and dried, and then is returned to the stator, so as to ensure that the stator is dried.
In an optional embodiment, the system further includes: the display equipment is connected with the controller and used for displaying the parameter data of the stator; and the memory is connected with the controller and is used for storing the parameter data of the stator.
In the above optional embodiment, the display device may be, but not limited to, an electronic device such as a smart phone, a notebook computer, an iPAD, or a device such as a display and a display screen, and is configured to display the parameter data. The memory may be any memory. In an alternative embodiment, the parameter data may include, but is not limited to: the nitrogen charging purity value, the first nitrogen pressure value, the second nitrogen pressure value, the nitrogen temperature value, the nitrogen humidity value, the insulation resistance value, the residual reserve capacity of the nitrogen cylinder and the like.
In an optional embodiment, the system further includes: the nitrogen cylinder is used for storing nitrogen; the stator further includes: and the nitrogen filling port is connected with a nitrogen cylinder and is used for transmitting the nitrogen in the nitrogen cylinder to the interior of the stator.
In the above optional embodiment, the nitrogen gas cylinder may be connected to the stator through a nitrogen charging port on the stator, and the nitrogen gas stored in the nitrogen gas cylinder may be transmitted to the inside of the stator through the nitrogen charging port, so as to fill or replace the stator with the nitrogen gas.
As an alternative embodiment, the nitrogen charging port may be a steam end cover plate charging port, an excitation end fixed cold water header pipe discharging port, and the like, and it is necessary to configure equipment such as a charging connector, a pressure gauge, an isolation valve, and the like on site when the excitation end fixed cold water header pipe discharging port is used as the nitrogen charging port.
In an alternative embodiment, before determining whether to fill the stator with nitrogen, the tightness test can be performed, but not limited to, with compressed air in a dryer (the compressed air is required to satisfy the condition of a dew point level of 3, i.e. a pressure dew point not higher than-20 ℃), and maintained for 1 hour after the nitrogen filling pressure in the stator reaches 20kPa, and if there is no significant pressure drop, the tightness test is considered to be qualified.
And under the condition that the air tightness test of the stator is qualified, vacuumizing the interior of the stator, slowly filling nitrogen (adopting pure nitrogen and nitrogen with the quality higher than that of the pure nitrogen according to GBT 8979 plus 2008 pure nitrogen, high-purity nitrogen and ultrapure nitrogen) to 20kPa at a constant speed, standing for 2 hours, slowly discharging the nitrogen to 2kPa in the interior of the stator, slowly filling the nitrogen to 20kPa at a constant speed, performing a nitrogen filling and pressure maintaining test for 12 hours, and regarding the condition that the pressure maintaining test is qualified if the leakage rate is less than 5%.
It should be noted that the specific structure of the automatic nitrogen charging system of the stator shown in fig. 1 to 2 in this application is only schematic, and the automatic nitrogen charging system of the stator in this application may have more or less structures than the automatic nitrogen charging system of the stator shown in fig. 1 to 2 in a specific application.
Example 2
In accordance with an embodiment of the present invention, there is provided an embodiment of a method for automatic nitrogen charging of a stator, it being noted that the steps illustrated in the flowchart of the drawings may be performed in a computer system such as a set of computer-executable instructions and that, although a logical order is illustrated in the flowchart, in some cases the steps illustrated or described may be performed in an order different than presented herein.
Fig. 3 is a flowchart of an automatic nitrogen charging method for a stator according to an embodiment of the present invention, as shown in fig. 3, the method including the steps of:
step S102, a target parameter of nitrogen in the stator is monitored.
And step S104, determining whether to fill nitrogen gas into the stator according to the target parameters.
In an alternative embodiment, the main execution subject of the above steps S102 to S104 may be an automatic nitrogen charging system of a stator, and may be, but is not limited to, any one of the alternative or preferred automatic nitrogen charging systems of the stator in embodiment 1.
Alternatively, the stator is a stationary part of the machine, with the rotor rotating inside or around the stator, which in the present embodiment may preferably be the stator in a generator.
As an alternative embodiment, the target parameter may be a maintenance parameter of the stator, and the stator may be protected from corrosion and moisture by performing long-term maintenance on the stator. The target parameters may include, but are not limited to: the nitrogen charging purity value, the first nitrogen pressure value, the second nitrogen pressure value, the nitrogen temperature value, the nitrogen humidity value, the insulation resistance value, the residual reserve capacity of the nitrogen cylinder and the like.
In the embodiment of the present application, the stator is determined to be filled with nitrogen gas when the target parameter does not satisfy a preset condition, for example, when the target parameter is a nitrogen gas purity value, the preset condition is that the nitrogen gas purity value is equal to or greater than a nitrogen gas purity threshold value, and when the nitrogen gas purity value is less than the nitrogen gas purity threshold value, the stator is determined to be filled with nitrogen gas.
In the embodiment of the invention, the target parameter of the nitrogen in the stator is monitored; and determining whether to fill the stator with nitrogen according to the target parameter. Based on the above-mentioned embodiment of this application, reached the maintenance parameter of automatic acquisition stator to whether confirm the purpose of filling nitrogen gas for the stator according to the maintenance parameter automatically, thereby realized alleviateing the technical effect of the maintenance work load and the maintenance degree of difficulty of stator, and then solved the maintenance parameter that needs artifical collection stator among the prior art, and artifical filling nitrogen gas for the stator, lead to the work load and the great technical problem of the degree of difficulty of maintenance stator.
In an alternative embodiment, the target parameters include: a nitrogen purity value; the step S104, determining whether to fill the stator with nitrogen according to the target parameter, includes:
step S202, receiving the nitrogen purity value sent by the monitoring equipment;
step S204, comparing the nitrogen purity value with the nitrogen purity threshold value;
and a step S206 of determining that the stator is filled with the nitrogen gas when the nitrogen gas purity value is smaller than the nitrogen gas purity threshold value.
In an embodiment of the present application, the target parameters include: a nitrogen purity value; in the case where the target parameter is a nitrogen purity value, a nitrogen purity detector may be used to monitor the nitrogen purity value of the nitrogen in the stator, and a controller may determine whether to fill the stator with nitrogen according to the nitrogen purity value, wherein in the case where the nitrogen purity value is smaller than a nitrogen purity threshold, it is determined that the stator is filled with the nitrogen.
It should be noted that the nitrogen purity mainly refers to the content of non-nitriding gas, and the nitrogen purity value can be expressed in unit% (volume content of nitrogen) or unit ppm (parts per million), ppb (parts per billion) of oxygen, and in the embodiment of the present application, the unit% can be used as an example for illustration.
In order to better maintain the stator and alleviate the maintenance requirement affected by too low nitrogen purity, in this embodiment of the present application, the threshold value of nitrogen purity may be 99.9%, when the value of nitrogen purity is less than (or understood to be lower than) the threshold value of nitrogen purity of 99.9%, it indicates that the current value of nitrogen purity is not qualified, and it is difficult to meet the maintenance requirement of the stator, it is determined that the stator needs to be filled with the nitrogen gas, and in an optional embodiment, the user may be prompted to increase the value of nitrogen purity of the nitrogen gas to the threshold value of nitrogen purity of 99.9% by outputting an alarm message or a prompt message to prompt the user to fill and discharge the nitrogen gas.
In an optional embodiment, the target parameter further includes: a first nitrogen pressure value in the stator; the step S104, determining whether to fill the stator with nitrogen according to the target parameter, includes:
step S302, receiving the first nitrogen pressure value sent by the first pressure transmitter;
step S304, comparing the first nitrogen pressure value with a first preset pressure value;
step S306, determining that the stator is filled with the nitrogen gas when the first nitrogen gas pressure value is smaller than the first predetermined pressure value.
In an alternative embodiment, the first pressure transmitter may be an online pressure transmitter, connected to the stator, for monitoring a first nitrogen pressure value in the stator, which may be, but is not limited to, characterizing a nitrogen charging pressure in the stator, and the first predetermined pressure value may be, but is not limited to, set to 2 kPa. When the first nitrogen pressure value is reduced to be lower than a first preset pressure value of 2kPa, namely under the condition that the first nitrogen pressure value is smaller than the first preset pressure value, the controller controls the automatic control nitrogen filling system to timely supplement nitrogen for the stator, so that the first nitrogen pressure value in the stator reaches the first preset pressure value of 2 kPa.
As an alternative embodiment, a voltage transformer may be used to replace the first pressure transmitter, so as to implement the functions implemented by the first pressure transmitter.
In an alternative embodiment, prior to or while monitoring the target parameter of the nitrogen gas in the stator, the method further comprises:
step S402, monitoring a second nitrogen pressure value in the nitrogen bottle;
step S404, comparing the second nitrogen pressure value with a second preset pressure value;
and step S406, outputting prompt information for prompting a user to replace the nitrogen cylinder under the condition that the second nitrogen pressure value is smaller than the second preset pressure value.
In an alternative embodiment, the second pressure transmitter may be used to monitor the second pressure value of the nitrogen gas in the nitrogen cylinder, but not limited to, as an alternative embodiment, a voltage transformer may be used to replace the second pressure transmitter, so as to implement the function implemented by the second pressure transmitter.
The second pressure transmitter may be an online pressure transmitter connected to the nitrogen cylinder for monitoring a second nitrogen pressure value in the nitrogen cylinder, the second nitrogen pressure value may be, but is not limited to being, used for characterizing the nitrogen pressure in the nitrogen cylinder, and the second predetermined pressure value may be, but is not limited to being, set to 10 kPa. When the second nitrogen pressure value is reduced to be lower than a second preset pressure value of 10kPa, namely under the condition that the second nitrogen pressure value is smaller than the second preset pressure value, the controller controls the automatic control nitrogen charging system to alarm and output prompt information for prompting a user to replace the nitrogen cylinder with sufficient nitrogen, so that the second nitrogen pressure value in the nitrogen cylinder reaches the second preset pressure value of 10 kPa.
In an alternative embodiment, before determining whether to fill the stator with nitrogen based on the target parameter, the method further comprises:
step S502, an air tightness test is performed on the stator.
In the above alternative embodiment, before determining whether to fill the stator with nitrogen, the air-tight test can be performed, but not limited to, with compressed air in a dryer (the compressed air should satisfy the condition of a dew point level of 3, i.e., a pressure dew point of not higher than-20 ℃), and the air-tight test is qualified if there is no significant pressure drop after the nitrogen filling pressure in the stator reaches 20kPa for 1 hour.
And step S504, when the airtight test of the stator is qualified, performing a pressure maintaining test on the stator.
And under the condition that the air tightness test of the stator is qualified, vacuumizing the interior of the stator, slowly filling nitrogen (adopting pure nitrogen and nitrogen with the quality higher than that of the pure nitrogen according to GBT 8979 plus 2008 pure nitrogen, high-purity nitrogen and ultrapure nitrogen) to 20kPa at a constant speed, standing for 2 hours, slowly discharging the nitrogen to 2kPa in the interior of the stator, slowly filling the nitrogen to 20kPa at a constant speed, performing a nitrogen filling and pressure maintaining test for 12 hours, and regarding the condition that the pressure maintaining test is qualified if the leakage rate is less than 5%.
It should be noted that any optional or preferred stator automatic nitrogen charging method in embodiment 2 of the present application may be implemented or realized in the stator automatic nitrogen charging system provided in embodiment 1 of the present application.
In addition, it should be noted that, for alternative or preferred embodiments of the present embodiment, reference may be made to the relevant description in embodiment 1, and details are not described herein again.
Example 3
According to an embodiment of the present invention, there is also provided an embodiment of an apparatus for implementing the automatic nitrogen charging method for a stator, fig. 4 is a schematic structural diagram of an automatic nitrogen charging apparatus for a stator according to an embodiment of the present invention, and as shown in fig. 4, the automatic nitrogen charging apparatus for a stator includes: a monitoring module 40 and a determination module 42, wherein:
a monitoring module 40 for monitoring a target parameter of nitrogen in the stator; and a determining module 42, configured to determine whether to fill the stator with nitrogen according to the target parameter.
It should be noted that the above modules may be implemented by software or hardware, for example, for the latter, the following may be implemented: the modules can be located in the same processor; alternatively, the modules may be located in different processors in any combination.
It should be noted here that the monitoring module 40 and the determining module 42 correspond to steps S102 to S104 in embodiment 2, and the modules are the same as the examples and application scenarios realized by the corresponding steps, but are not limited to the disclosure of embodiment 1. It should be noted that the modules described above may be implemented in a computer terminal as part of an apparatus.
It should be noted that, reference may be made to the relevant description in embodiment 1 for alternative or preferred embodiments of this embodiment, and details are not described here again.
The automatic nitrogen charging device for the stator may further include a processor and a memory, where the monitoring module 40, the determining module 42, and the like are stored in the memory as program units, and the processor executes the program units stored in the memory to implement corresponding functions.
The processor comprises a kernel, and the kernel calls a corresponding program unit from the memory, wherein one or more than one kernel can be arranged. The memory may include volatile memory in a computer readable medium, Random Access Memory (RAM) and/or nonvolatile memory such as Read Only Memory (ROM) or flash memory (flash RAM), and the memory includes at least one memory chip.
According to the embodiment of the application, the embodiment of the storage medium is also provided. Optionally, in this embodiment, the storage medium includes a stored program, and when the program runs, the apparatus in which the storage medium is located is controlled to execute the automatic nitrogen charging method for any stator.
Optionally, in this embodiment, the storage medium may be located in any one of a group of computer terminals in a computer network, or in any one of a group of mobile terminals, and the storage medium includes a stored program.
Optionally, the program controls the device on which the storage medium is located to perform the following functions when running: monitoring a target parameter of nitrogen in the stator; and determining whether to fill the stator with nitrogen according to the target parameter.
Optionally, the program controls the device on which the storage medium is located to perform the following functions when running: receiving the nitrogen purity value sent by monitoring equipment; comparing the nitrogen purity value with the nitrogen purity threshold value; and determining that the stator is filled with the nitrogen gas when the nitrogen gas purity value is smaller than the nitrogen gas purity threshold value.
Optionally, the program controls the device on which the storage medium is located to perform the following functions when running: receiving the first nitrogen pressure value sent by the first pressure transmitter; comparing the first nitrogen pressure value with a first preset pressure value; and determining that the stator is filled with the nitrogen gas when the first nitrogen gas pressure value is smaller than the first preset pressure value.
Optionally, the program controls the device on which the storage medium is located to perform the following functions when running: monitoring a second nitrogen pressure value in the nitrogen cylinder; comparing the second nitrogen pressure value with a second preset pressure value; and outputting prompt information for prompting a user to replace the nitrogen cylinder under the condition that the second nitrogen pressure value is smaller than the second preset pressure value.
Optionally, the program controls the device on which the storage medium is located to perform the following functions when running: carrying out an air tightness test on the stator; and performing a pressure maintaining test on the stator when the airtight test of the stator is qualified.
According to the embodiment of the application, the embodiment of the processor is also provided. Optionally, in this embodiment, the processor is configured to execute a program, where the program is executed to perform any one of the automatic nitrogen charging methods for a stator.
The embodiment of the application provides equipment, the equipment comprises a processor, a memory and a program which is stored on the memory and can run on the processor, and the following steps are realized when the processor executes the program: monitoring a target parameter of nitrogen in the stator; and determining whether to fill the stator with nitrogen according to the target parameter.
Optionally, when the processor executes a program, the processor may further receive the nitrogen purity value sent by the monitoring device; comparing the nitrogen purity value with the nitrogen purity threshold value; and determining that the stator is filled with the nitrogen gas when the nitrogen gas purity value is smaller than the nitrogen gas purity threshold value.
Optionally, when the processor executes a program, the processor may further receive the first nitrogen pressure value sent by the first pressure transmitter; comparing the first nitrogen pressure value with a first preset pressure value; and determining that the stator is filled with the nitrogen gas when the first nitrogen gas pressure value is smaller than the first preset pressure value.
Optionally, when the processor executes the program, the processor may further monitor a second nitrogen pressure value in the nitrogen cylinder; comparing the second nitrogen pressure value with a second preset pressure value; and outputting prompt information for prompting a user to replace the nitrogen cylinder under the condition that the second nitrogen pressure value is smaller than the second preset pressure value.
Optionally, when the processor executes a program, the processor may further perform an air tightness test on the stator; and performing a pressure maintaining test on the stator when the airtight test of the stator is qualified.
The present application further provides a computer program product adapted to perform a program for initializing the following method steps when executed on a data processing device: monitoring a target parameter of nitrogen in the stator; and determining whether to fill the stator with nitrogen according to the target parameter.
Optionally, when the computer program product executes a program, the nitrogen purity value sent by the monitoring device may also be received; comparing the nitrogen purity value with the nitrogen purity threshold value; and determining that the stator is filled with the nitrogen gas when the nitrogen gas purity value is smaller than the nitrogen gas purity threshold value.
Optionally, when the computer program product executes a program, the computer program product may further receive the first nitrogen pressure value sent by the first pressure transmitter; comparing the first nitrogen pressure value with a first preset pressure value; and determining that the stator is filled with the nitrogen gas when the first nitrogen gas pressure value is smaller than the first preset pressure value.
Optionally, when the computer program product executes the program, the second nitrogen pressure value in the nitrogen cylinder may be monitored; comparing the second nitrogen pressure value with a second preset pressure value; and outputting prompt information for prompting a user to replace the nitrogen cylinder under the condition that the second nitrogen pressure value is smaller than the second preset pressure value.
Optionally, when the computer program product executes a program, the air tightness test of the stator may be performed; and performing a pressure maintaining test on the stator when the airtight test of the stator is qualified.
The above-mentioned serial numbers of the embodiments of the present invention are merely for description and do not represent the merits of the embodiments.
In the above embodiments of the present invention, the descriptions of the respective embodiments have respective emphasis, and for parts that are not described in detail in a certain embodiment, reference may be made to related descriptions of other embodiments.
In the embodiments provided in the present application, it should be understood that the disclosed technology can be implemented in other ways. The above-described embodiments of the apparatus are merely illustrative, and for example, the division of the units may be a logical division, and in actual implementation, there may be another division, for example, multiple 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, units or modules, and may be in an electrical or other form.
The 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 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 unit, if implemented in the form of a software functional unit and sold or used as a stand-alone product, may be stored in a computer readable storage medium. Based on such understanding, the technical solution of the present invention may be embodied in the form of a software product, which is stored in a storage medium and includes instructions for causing a computer device (which may be a personal computer, a server, or a network device) to execute all or part of the steps of the method according to the embodiments of the present invention. And the aforementioned storage medium includes: a U-disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a removable hard disk, a magnetic or optical disk, and other various media capable of storing program codes.
The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, various modifications and decorations can be made without departing from the principle of the present invention, and these modifications and decorations should also be regarded as the protection scope of the present invention.

Claims (10)

1. An automatic nitrogen charging system for a stator, comprising:
a stator;
monitoring equipment, with the stator is connected for monitor the target parameter of nitrogen in the stator, wherein, the target parameter includes: a nitrogen purity value;
the controller is connected with the monitoring equipment and used for determining whether the stator is filled with nitrogen or not according to the nitrogen purity value, wherein the stator is determined to be filled with the nitrogen under the condition that the nitrogen purity value is smaller than a nitrogen purity threshold value;
wherein the system further comprises: the second pressure transmitter is connected with the nitrogen cylinder and used for acquiring a second nitrogen pressure value in the nitrogen cylinder and outputting the second nitrogen pressure value to the controller; the controller is also connected with the second pressure transmitter and is used for outputting prompt information for prompting a user to replace the nitrogen cylinder under the condition that the second nitrogen pressure value is smaller than a second preset pressure value;
wherein the system further comprises: the humidity detector is connected with the stator and used for detecting the humidity value of the nitrogen in the stator; the dryer is connected with the stator and is used for drying the nitrogen;
the controller is also connected with the humidity detector and is used for controlling the dryer to dry the nitrogen under the condition that the humidity value is greater than the humidity threshold value;
wherein the system further comprises: the megohmmeter is connected with the stator and used for detecting the insulation resistance value of the stator winding;
the controller is also connected with the megohmmeter and used for controlling the dryer to dry the nitrogen under the condition that the insulation resistance value is smaller than the resistance threshold value.
2. The system of claim 1,
the target parameters further include: a first nitrogen pressure value in the stator; the system further comprises: the first pressure transmitter is connected with the stator and used for acquiring a first nitrogen pressure value in the stator and outputting the first nitrogen pressure value to the controller;
the controller is further connected with the first pressure transmitter and used for determining that the stator is filled with the nitrogen under the condition that the first nitrogen pressure value is smaller than a first preset pressure value.
3. The system of claim 1,
the system further comprises: the temperature transmitter is connected with the stator and used for detecting the temperature value of the nitrogen in the stator and outputting the temperature value to the controller; the heater is connected with the stator and used for heating the nitrogen in the stator;
the controller is further connected with the temperature transmitter and the heater and is used for controlling the heater to carry out temperature rise treatment on the nitrogen in the stator under the condition that the temperature value is smaller than the temperature threshold value.
4. The system of claim 1, further comprising:
the display equipment is connected with the controller and used for displaying the parameter data of the stator;
and the memory is connected with the controller and used for storing the parameter data of the stator.
5. The system according to any one of claims 1 to 4,
the system further comprises: the nitrogen cylinder is used for storing nitrogen;
the stator further includes: and the nitrogen filling port is connected with a nitrogen cylinder and used for transmitting the nitrogen in the nitrogen cylinder to the inside of the stator.
6. An automatic nitrogen charging method for a stator, comprising:
monitoring a target parameter of nitrogen in the stator;
determining whether to fill nitrogen for the stator according to the target parameter;
wherein prior to or while monitoring the target parameter of the nitrogen gas in the stator, the method further comprises:
monitoring a second nitrogen pressure value in the nitrogen cylinder;
comparing the second nitrogen pressure value with a second preset pressure value;
under the condition that the second nitrogen pressure value is smaller than the second preset pressure value, outputting prompt information for prompting a user to replace the nitrogen cylinder;
wherein the method further comprises: detecting the humidity value of the nitrogen in the stator; controlling a dryer to dry the nitrogen under the condition that the humidity value is greater than a humidity threshold value;
wherein the method further comprises: detecting an insulation resistance value of the stator winding; and controlling the dryer to dry the nitrogen gas under the condition that the insulation resistance value is smaller than the resistance threshold value.
7. The method of claim 6, wherein the target parameters comprise: a nitrogen purity value; determining whether to fill the stator with nitrogen according to the target parameter includes:
receiving the nitrogen purity value sent by monitoring equipment;
comparing the nitrogen purity value with a nitrogen purity threshold value;
determining to fill the stator with the nitrogen gas if the nitrogen purity value is less than the nitrogen purity threshold.
8. The method of claim 6, wherein the target parameters further comprise: a first nitrogen pressure value in the stator; determining whether to fill the stator with nitrogen according to the target parameter includes:
receiving the first nitrogen pressure value sent by a first pressure transmitter;
comparing the first nitrogen pressure value with a first preset pressure value;
determining that the stator is filled with the nitrogen gas when the first nitrogen gas pressure value is less than the first predetermined pressure value.
9. The method of claim 6, wherein prior to determining whether to charge the stator with nitrogen based on the target parameter, the method further comprises:
carrying out an air tightness test on the stator;
and carrying out a pressure maintaining test on the stator under the condition that the airtight test of the stator is qualified.
10. An automatic nitrogen charging device for a stator, comprising:
the monitoring module is used for monitoring target parameters of nitrogen in the stator;
the determining module is used for determining whether the stator is filled with nitrogen or not according to the target parameters;
wherein the device is also used for monitoring a second nitrogen pressure value in the nitrogen cylinder; comparing the second nitrogen pressure value with a second preset pressure value; under the condition that the second nitrogen pressure value is smaller than the second preset pressure value, outputting prompt information for prompting a user to replace the nitrogen cylinder;
wherein the device is also used for detecting the humidity value of the nitrogen in the stator; controlling a dryer to dry the nitrogen under the condition that the humidity value is greater than a humidity threshold value;
wherein the device is also used for detecting the insulation resistance value of the stator winding; and controlling the dryer to dry the nitrogen gas under the condition that the insulation resistance value is smaller than the resistance threshold value.
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