CN104316869A - Action air pressure detection method and system for pressure switch of vacuum main circuit breaker - Google Patents

Action air pressure detection method and system for pressure switch of vacuum main circuit breaker Download PDF

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Publication number
CN104316869A
CN104316869A CN201410529609.8A CN201410529609A CN104316869A CN 104316869 A CN104316869 A CN 104316869A CN 201410529609 A CN201410529609 A CN 201410529609A CN 104316869 A CN104316869 A CN 104316869A
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China
Prior art keywords
circuit breaker
vacuum circuit
line vacuum
pressure switch
air pressure
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CN201410529609.8A
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Chinese (zh)
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CN104316869B (en
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黎莎
谭斌
黄伟
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WUHAN LISAI TECHNOLOGY Co Ltd
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WUHAN LISAI TECHNOLOGY Co Ltd
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Abstract

The invention discloses an action air pressure detection method and a detection system for a pressure switch of a vacuum main circuit breaker. The method comprises steps: pulse voltage is applied to a control interface of the vacuum main circuit breaker, and whether current exists in a control circuit of the vacuum main circuit breaker is detected; values of air pressure applied to the pressure switch of the vacuum main circuit breaker are raised sequentially; and when current is detected to exist in the control circuit, the applied air pressure value is recorded to serve as an action air pressure value of the pressure switch. A bottom cover of the vacuum main circuit breaker does not need to be opened, the operation process is simple, the vacuum main circuit breaker has no action during the test process, mechanical loss of the vacuum main circuit breaker is reduced, and the working service life of the vacuum main circuit breaker is improved.

Description

A kind of action air pressure detection method of pressure switch of line vacuum circuit breaker and system
Technical field
The present invention relates to line vacuum circuit breaker detection field, particularly relate to a kind of action air pressure detection method and system of pressure switch of line vacuum circuit breaker.
Background technology
Railway electric locomotive, motor train unit generally use line vacuum circuit breaker at present, and line vacuum circuit breaker needs certain operating air pressure normally to work.Therefore a pressure switch is set in line vacuum circuit breaker, when only having the air pressure when the pressure switch being applied to line vacuum circuit breaker to reach the action atmospheric pressure value of pressure switch, the control circuit of line vacuum circuit breaker could connect work.Therefore, when regularly carrying out detection adjustment to line vacuum circuit breaker performance, the action atmospheric pressure value of test pressure switch is extremely important.
Fig. 1 is the control circuit schematic diagram of line vacuum circuit breaker in prior art, as shown in Figure 1, the control procedure of line vacuum circuit breaker is as follows: when the air pressure of the pressure switch being applied to line vacuum circuit breaker reaches the operating air pressure of line vacuum circuit breaker, pressure switch S1 adhesive.When applying control voltage V+ to control circuit, pressure switch S1 and resistance R2 of leading up to is added to triode Q1, makes triode Q1 conducting, thus loop G1-R1-K1-Q1 conducting, field effect transistor G1 conducting, holding coil L1 obtains electric, line vacuum circuit breaker action.Separately lead up to time relay J1, when to enter the electricity time be about 0.5 second, K switch 1 disconnects, and loop G1-R1-K1-Q1 disconnects, field effect transistor G1 closedown, holding coil L1 dead electricity.When the operating air pressure of the air pressure of pressure switch being applied to line vacuum circuit breaker lower than line vacuum circuit breaker, pressure switch S1 not conducting, triode Q1 can not conducting, loop G1-R1-K1-Q1 can not conducting, thus field effect transistor G1 can not conducting, holding coil L1 must not be electric, line vacuum circuit breaker akinesia.Detect the working value of the pressure switch of line vacuum circuit breaker, adopt the method progressively improving the air pressure of the pressure switch of line vacuum circuit breaker, when pressure switch adhesive being detected, air pressure is now the action atmospheric pressure value of pressure switch.Be in pressure switch, add a voltage to the detection method of pressure switch whether adhesive, when pressure switch adhesive, loss of voltage detected, thus determine pressure switch adhesive.In pressure switch, alive mode has two kinds: one is directly added in pressure switch two ends, this is the method used at present, but this method needs the bottom opening line vacuum circuit breaker, adds workload, be separated with other content measurement of line vacuum circuit breaker.Another kind method is the control interface making alive at line vacuum circuit breaker, no current is had to judge pressure switch whether adhesive by detecting the control circuit of line vacuum circuit breaker, but due to the existence of time relay J1, when the air pressure being applied to the pressure switch of line vacuum circuit breaker is not also raised to the action air pressure of pressure switch, control circuit disconnects, no matter pressure switch whether adhesive, the equal no current of control circuit, so kind method cannot directly use.
Summary of the invention
In view of this, the embodiment of the present invention provides a kind of action air pressure detection method and detection system of pressure switch of line vacuum circuit breaker, for the detection not needing the bottom opening line vacuum circuit breaker just can complete the action atmospheric pressure value to pressure switch.
On the one hand, a kind of action air pressure detection method of pressure switch of line vacuum circuit breaker, the control interface comprised to described line vacuum circuit breaker applies pulse voltage, and detects in the control circuit of line vacuum circuit breaker whether have electric current;
Raise the atmospheric pressure value that the pressure switch to described line vacuum circuit breaker applies successively;
Detect in described control circuit have electric current time, record the action atmospheric pressure value of atmospheric pressure value as described pressure switch of described applying.
Further, also comprised before the described control interface to line vacuum circuit breaker applies pulse voltage:
The atmospheric pressure value of the pressure switch being applied to described line vacuum circuit breaker is risen to starting value;
Describedly raise the atmospheric pressure value that the pressure switch to described vacuum circuit breaker applies successively and comprise:
When in the control circuit described line vacuum circuit breaker being detected during no current, raise the atmospheric pressure value that the pressure switch to described vacuum circuit breaker applies;
Repeat above-mentioned steps until detect in described control circuit have electric current.
Further, the air pressure at every turn raised to the pressure switch of described line vacuum circuit breaker is 1 kPa.
Further, the width of described pulse voltage is less than the delay time of the time relay of line vacuum circuit breaker.
Further, the width of described pulse voltage is 50 ~ 200ms.
Further, the amplitude of described pulse voltage is lower than the minimum voltage action of the solenoid valve of described line vacuum circuit breaker.
On the other hand, a kind of action Measurement System of Air Pressure of pressure switch of line vacuum circuit breaker, comprises pulse voltage applying unit, current detecting unit, record cell and air pressure applying unit:
The described output terminal of pulse voltage applying unit is connected with the input end of current detecting unit, and described pulse applying unit is used for applying pulse voltage to the control interface of line vacuum circuit breaker;
First output terminal of described current detecting unit is connected with the input end of record cell, and the second output terminal is connected with air pressure unit input end, described current detecting unit for detect line vacuum circuit breaker control circuit in have no current;
The output terminal of described air pressure applying unit is connected with the input end of described pulse voltage applying unit and is used for when current detecting unit detects no current in the control circuit of line vacuum circuit breaker, raises the atmospheric pressure value that the pressure switch to described vacuum circuit breaker applies successively;
When described record cell has electric current for detecting in the control circuit of line vacuum circuit breaker when current detecting unit, record the action atmospheric pressure value of atmospheric pressure value as described pressure switch of described applying.
Further, apply before pulse voltage at the control interface of described pulse voltage applying unit to line vacuum circuit breaker, described air pressure applying unit also for
The atmospheric pressure value of the pressure switch being applied to described line vacuum circuit breaker is risen to starting value;
Described air pressure applying unit concrete also for described line vacuum circuit breaker detected when current detecting unit control circuit in no current time, the atmospheric pressure value that the rising of air pressure applying unit applies to the pressure switch of described vacuum circuit breaker;
Repeat aforesaid operations until current detecting unit detects in described control circuit have electric current.
The action air pressure detection method of the pressure switch of a kind of line vacuum circuit breaker that the embodiment of the present invention provides and detection system, pulse voltage is applied and the electric current detected in the control circuit of line vacuum circuit breaker by the control interface at line vacuum circuit breaker, judge whether have electric current in control circuit, if there is electric current, then test, the action atmospheric pressure value of record pressure switch.If there is no electric current, then air pressure is raised successively, then carry out the detection of a new round.The present invention directly at the control interface place making alive of line vacuum circuit breaker, avoids the bottom opening line vacuum circuit breaker, makes easy and simple to handle and decrease workload.Adopt and apply the mode of pulse voltage, the voltage at every turn outputting to line vacuum circuit breaker, extremely short time, makes the time relay be failure to actuate.Simultaneously the amplitude of pulse voltage controls below the operation voltage of the solenoid valve of line vacuum circuit breaker, after making pressure switch action main disconnected can not action, decrease the mechanical loss of line vacuum circuit breaker, improve the mission life of line vacuum circuit breaker.
Accompanying drawing explanation
By reading the detailed description done non-limiting example done with reference to the following drawings, other features, objects and advantages of the present invention will become more obvious:
Fig. 1 is the control circuit schematic diagram of line vacuum circuit breaker in prior art;
Fig. 2 is the process flow diagram one of the action air pressure detection method of the pressure switch of a kind of line vacuum circuit breaker that the embodiment of the present invention one provides;
Fig. 3 is the flowchart 2 of the action air pressure detection method of the pressure switch of a kind of line vacuum circuit breaker that the embodiment of the present invention two provides;
The module map of the action Measurement System of Air Pressure of the pressure switch of a kind of line vacuum circuit breaker that Fig. 4 embodiment of the present invention three provides.
The technical characteristic referred in accompanying drawing is:
1, pulse voltage applying unit; 2, current detecting unit; 3, record cell;
4, air pressure applying unit.
Embodiment
Below in conjunction with drawings and Examples, the present invention is described in further detail.Be understandable that, specific embodiment described herein is only for explaining the present invention, but not limitation of the invention.It also should be noted that, for convenience of description, illustrate only part related to the present invention in accompanying drawing but not full content.
Specific embodiment one
Fig. 2 is the process flow diagram one of the action air pressure detection method of the pressure switch of a kind of line vacuum circuit breaker that the embodiment of the present invention one provides.Comprise the steps: as shown in Figure 2
Step S11: the control interface to line vacuum circuit breaker applies pulse voltage, and detects in the control circuit of line vacuum circuit breaker whether have electric current.
Before this step, the atmospheric pressure value of the pressure switch being applied to line vacuum circuit breaker is risen to starting value.
Step S12: raise the atmospheric pressure value that the pressure switch to described line vacuum circuit breaker applies successively.
In this step, when in the control circuit described line vacuum circuit breaker being detected during no current, raise the atmospheric pressure value that the pressure switch to vacuum circuit breaker applies.Repeated execution of steps S11 is until detect in control circuit have electric current.
Step S13: detect in control circuit have electric current time, the atmospheric pressure value that record applies is as the action atmospheric pressure value of pressure switch.
Specific embodiment two
The embodiment of the present invention two provides a kind of action air pressure detection method of pressure switch of line vacuum circuit breaker.Fig. 3 is the flowchart 2 of the action air pressure detection method of the pressure switch of a kind of line vacuum circuit breaker that the embodiment of the present invention two provides.As shown in Figure 3, comprise the following steps:
Step S21: the atmospheric pressure value of the pressure switch being applied to described line vacuum circuit breaker is risen to starting value.
In this step, when the action air pressure of detected pressures switch, apply an air pressure first to the pressure switch of line vacuum circuit breaker (hereinafter referred to as " main disconnected "), the value of this air pressure is called starting value, the size of starting value is determined according to operating air pressure when ensureing main disconnected normal work, in general, the starting value of air pressure is less than the value of operating air pressure.Concrete, starting value is 200 kPas.
Step S22: the control interface to described line vacuum circuit breaker applies pulse voltage, and detects in the control circuit of line vacuum circuit breaker whether have electric current.
In this step, apply a pulse voltage to line vacuum circuit breaker control interface, the width of pulse voltage is preferred, and between 50 ~ 200ms, the amplitude of pulse voltage is lower than the minimum voltage action leading disconnected solenoid valve.Have two-way voltage signal when main disconnected control interface applies pulse voltage, a road voltage signal delivers to the main disconnected solenoid starting solenoid valve, and solenoid valve obtains electricity and opens gas circuit.Pressure switch of simultaneously separately leading up to delivers to holding coil, and holding coil obtains electric, produces a lasting combined floodgate electromagnetic force.When the amplitude of pulse voltage is lower than when starting the minimum voltage of solenoid valve, because solenoid valve is not opened, main disconnected akinesia.
Detect in main disconnected control circuit and whether have electric current, if pressure switch now adhesive, then can detect in control circuit and have electric current to flow through.If no current occurs, then prove that now pressure switch does not have adhesive, the atmospheric pressure value being now applied to the pressure switch of line vacuum circuit breaker is not the action atmospheric pressure value of pressure switch, the action atmospheric pressure value of pressure switch refer to can allow pressure switch just adhesive atmospheric pressure value.Adopting pulse voltage to be applied to main disconnected control interface is because the time of pulse voltage is significantly smaller than actuation time of the time relay, the time relay is failure to actuate, as long as ensure that control circuit is in pressure switch and connects the state just connected.After every subpulse completes, when pulse next time arrives, the time relay is timing from newly, not to trip time with regard to control circuit with regard to dead electricity, the time relay can not arrive trip time all the time, ensure that normally carrying out of detection.
Step S23: judge whether electric current detected in the control circuit of line vacuum circuit breaker, if no current, then performs step S24, otherwise performs step S25.
Step S4: raise the atmospheric pressure value that the pressure switch to described vacuum circuit breaker applies, then performs step S22.
In this step, when detect in control circuit do not have electric current to flow through time, then now pressure switch does not have adhesive, so, by repeating the step of above-mentioned steps S22 to S24, raise the atmospheric pressure value that the pressure switch to line vacuum circuit breaker applies successively, and the air pressure at every turn raised to the pressure switch of line vacuum circuit breaker preferably, is 1 kPa.The atmospheric pressure value of each rising is not easily too large, and this contributes to the critical value determining to make the air pressure just having electric current to flow through in control circuit.Until pressure switch adhesive detected, till there is electric current in control circuit.
Step S25: detect in described control circuit have electric current time, record the action atmospheric pressure value of atmospheric pressure value as described pressure switch of described applying.
In this step, when detect in control circuit have electric current to flow through time, then now pressure switch adhesive.Test completes, and the atmospheric pressure value be now applied in pressure switch is exactly the action atmospheric pressure value of pressure switch.It should be noted that, detect that control circuit refers in control circuit just have electric current to flow through when having electric current to flow through.Described just have electric current to flow through to refer in previous moment control circuit do not have electric current to flow through, have electric current to flow through in a rear moment control circuit.
Specific embodiment three
The module map of the action Measurement System of Air Pressure of the pressure switch of a kind of line vacuum circuit breaker that Fig. 4 embodiment of the present invention three provides.As shown in Figure 4, the action Measurement System of Air Pressure of pressure switch comprises pulse voltage applying unit 1, current detecting unit 2, record cell 3 and air pressure applying unit 4: the output terminal of pulse voltage applying unit 1 is connected with the input end of current detecting unit 2, and pulse voltage applying unit 1 applies pulse voltage for the control interface to line vacuum circuit breaker; First output terminal of current detecting unit 2 is connected with the input end of record cell 3, and the second output terminal is connected with the input end of air pressure unit 3, current detecting unit 2 for detect line vacuum circuit breaker control circuit in have no current; The output terminal of air pressure applying unit 4 is connected with the input end of pulse voltage applying unit 1 and is used for when current detecting unit 2 detects no current in the control circuit of line vacuum circuit breaker, raises the atmospheric pressure value that the pressure switch to described vacuum circuit breaker applies successively; When record cell 3 has electric current for detecting in the control circuit of line vacuum circuit breaker when current detecting unit 2, the atmospheric pressure value that record applies is as the action atmospheric pressure value of pressure switch.
Concrete, before pulse voltage applying unit 1 applies pulse voltage to main disconnected control interface: air pressure applying unit 4 is also for rising to starting value by the atmospheric pressure value of the pressure switch being applied to line vacuum circuit breaker; Air pressure applying unit 4 is concrete also for when current detecting unit 2 detects no current in the control circuit of line vacuum circuit breaker, and air pressure applying unit 4 raises the atmospheric pressure value that the pressure switch to vacuum circuit breaker applies; Repeat aforesaid operations until current detecting unit 2 detects in control circuit have electric current.
It should be noted that, the action Measurement System of Air Pressure of the pressure switch of line vacuum circuit breaker adopts control and testing by computer, and automatic decision goes out the working value of pressure switch.Namely, on the existing testing table of line vacuum circuit breaker, change control software, increases pressure switch action air pressure test function by above-mentioned method flow diagram and system module figure.
The action air pressure detection method of the pressure switch of a kind of line vacuum circuit breaker that the embodiment of the present invention provides and detection system, by applying the action atmospheric pressure value that pulse voltage judges to have no current to pass through in main disconnected control circuit and then determine pressure switch at main disconnected interface, the scope raised due to each air pressure is very little, and the atmospheric pressure value just having electric current to pass through in the control circuit so making master break is exactly the action atmospheric pressure value of pressure switch.The present invention is easy and simple to handle, in the process of operation, does not need to open main disconnected bottom, only need in main disconnected proper testing process, increases a pressure switch action air pressure test command and in test process, main disconnected attonity, extends main serviceable life of breaking.
Note, above are only preferred embodiment of the present invention and institute's application technology principle.Skilled person in the art will appreciate that and the invention is not restricted to specific embodiment described here, various obvious change can be carried out for a person skilled in the art, readjust and substitute and can not protection scope of the present invention be departed from.Therefore, although be described in further detail invention has been by above embodiment, the present invention is not limited only to above embodiment, when not departing from the present invention's design, can also comprise other Equivalent embodiments more, and scope of the present invention is determined by appended right.

Claims (8)

1. an action air pressure detection method for the pressure switch of line vacuum circuit breaker, is characterized in that,
Control interface to described line vacuum circuit breaker applies pulse voltage, and detects in the control circuit of line vacuum circuit breaker whether have electric current;
Raise the atmospheric pressure value that the pressure switch to described line vacuum circuit breaker applies successively;
Detect in described control circuit have electric current time, record the action atmospheric pressure value of atmospheric pressure value as described pressure switch of described applying.
2. method according to claim 1, is characterized in that, also comprises before the described control interface to line vacuum circuit breaker applies pulse voltage:
The atmospheric pressure value of the pressure switch being applied to described line vacuum circuit breaker is risen to starting value;
Describedly raise the atmospheric pressure value that the pressure switch to described vacuum circuit breaker applies successively and comprise:
When in the control circuit described line vacuum circuit breaker being detected during no current, raise the atmospheric pressure value that the pressure switch to described vacuum circuit breaker applies;
Repeat above-mentioned steps until detect in described control circuit have electric current.
3. method according to claim 2, is characterized in that, the air pressure at every turn raised to the pressure switch of described line vacuum circuit breaker is 1 kPa.
4., according to the arbitrary described method of claim 1-3, it is characterized in that, the width of described pulse voltage is less than the delay time of the time relay of line vacuum circuit breaker.
5. method according to claim 4, is characterized in that, the width of described pulse voltage is 50 ~ 200ms.
6. according to the arbitrary described method of claim 1-3, the described vacuum master device that breaks comprises solenoid valve, it is characterized in that, the amplitude of described pulse voltage is lower than the minimum voltage action of the solenoid valve of described line vacuum circuit breaker.
7. an action Measurement System of Air Pressure for the pressure switch of line vacuum circuit breaker, is characterized in that, comprises pulse voltage applying unit, current detecting unit, record cell and air pressure applying unit:
The described output terminal of pulse voltage applying unit is connected with the input end of current detecting unit, and described pulse applying unit is used for applying pulse voltage to the control interface of line vacuum circuit breaker;
First output terminal of described current detecting unit is connected with the input end of record cell, and the second output terminal is connected with the input end of air pressure applying unit, described current detecting unit for detect line vacuum circuit breaker control circuit in have no current;
The output terminal of described air pressure applying unit is connected with the input end of described pulse voltage applying unit and is used for when current detecting unit detects no current in the control circuit of line vacuum circuit breaker, raises the atmospheric pressure value that the pressure switch to described vacuum circuit breaker applies successively;
When described record cell has electric current for detecting in the control circuit of line vacuum circuit breaker when current detecting unit, record the action atmospheric pressure value of atmospheric pressure value as described pressure switch of described applying.
8. the action Measurement System of Air Pressure of the pressure switch of line vacuum circuit breaker according to claim 7, is characterized in that, applies before pulse voltage at the control interface of described pulse voltage applying unit to line vacuum circuit breaker, described air pressure applying unit also for
The atmospheric pressure value of the pressure switch being applied to described line vacuum circuit breaker is risen to starting value;
Described air pressure applying unit concrete also for described line vacuum circuit breaker detected when current detecting unit control circuit in no current time, the atmospheric pressure value that the rising of air pressure applying unit applies to the pressure switch of described vacuum circuit breaker;
Repeat aforesaid operations until current detecting unit detects in described control circuit have electric current.
CN201410529609.8A 2014-10-10 2014-10-10 The action air pressure detection method and system of a kind of pressure switch of line vacuum circuit breaker Active CN104316869B (en)

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Publication number Priority date Publication date Assignee Title
CN108051735A (en) * 2017-11-22 2018-05-18 国网湖南省电力有限公司 A kind of high-voltage circuitbreaker fills air pressure transient amount detection systems and its application process
CN110339872A (en) * 2019-06-24 2019-10-18 国家电网有限公司 A kind of altitude environment simulator stand

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CN108051735A (en) * 2017-11-22 2018-05-18 国网湖南省电力有限公司 A kind of high-voltage circuitbreaker fills air pressure transient amount detection systems and its application process
CN110339872A (en) * 2019-06-24 2019-10-18 国家电网有限公司 A kind of altitude environment simulator stand

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