CN108716988A - A kind of high-tension switch gear machine performance monitoring method and device - Google Patents
A kind of high-tension switch gear machine performance monitoring method and device Download PDFInfo
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- CN108716988A CN108716988A CN201810532708.XA CN201810532708A CN108716988A CN 108716988 A CN108716988 A CN 108716988A CN 201810532708 A CN201810532708 A CN 201810532708A CN 108716988 A CN108716988 A CN 108716988A
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Abstract
The present invention provides a kind of high-tension switch gear machine performance monitoring method and devices, obtain high-tension switch gear driving torque characteristic in real time；The high-tension switch gear driving torque characteristic of acquisition match comparing with the standard torque characteristic of high-tension switch gear normal condition；If the difference of the high-tension switch gear driving torque characteristic obtained and the standard torque characteristic of high-tension switch gear normal condition is less than the range of setting, it is judged as that high-tension switch gear state is normal；If the difference of the high-tension switch gear driving torque characteristic obtained and the standard torque characteristic of high-tension switch gear normal condition is more than the range of setting, it is judged as that high-tension switch gear machine performance is abnormal.The right judging rate for improving high-tension switch gear machine performance is capable of detecting when the various failures that may occur of high-tension switch gear.The method of the present invention realizes that the parts that the monitoring of high-tension switch gear uses are less therefore simple in structure, easy to operate, reduces the probability of malfunction of high-tension switch gear.
Description
Technical field
The invention belongs to the technical field of high-voltage intelligent circuit breaker, more particularly to a kind of high-tension switch gear machine performance prison
Survey method and device.
Background technology
Breaker plays very important role in the power system, protective effect is played to electric system, all kinds of
In breaker, mechanical breakdown is always to influence one of main problem of its power supply reliability.Accident in terms of operating mechanism is occupied
Relatively high ratio, various countries researcher have poured into great effort to the vibration diagnosis of Mechanical Failure of HV Circuit Breaker, have achieved
Some achievements in research, but do not have breakthrough always, it is also necessary to deepen continuously research.In particular, current, national smart grid construction pair
Practical intelligent electric appliance has a urgent demand, high reliability, high right judging rate High-Voltage Electrical Appliances mechanical fault diagnosis research
With important social effect and economic value.
Include at present mainly three aspects to the monitoring of the high-tension switch gear machine performance of high-voltage circuitbreaker etc.：It is pair first
The monitoring of carrier state information signal amount during switchgear actuating, mainly by electromagnet coil current, energy storage motor electric current
With the signals such as vibration of specific location during position, auxiliary switch position or stroke and actuating；Secondly, from various monitorings
Extraction characterization machine performance or the characteristic quantity or Feature Mapping of machine performance variation in signal, as stroke curve, coil current are bent
Line, vibration envelope and time-frequency, energy feature etc.；Again, it is carried out using mathematical logic integrated approach switching devices operating status
Identification finds fault signature or degradation trend, and state-maintenance strategy is arranged according to trend.
It is entitled " a kind of method for diagnosing faults of mechanical state of high-voltage circuit breaker " such as Publication No. " CN107179502A "
Chinese patent, which makes full use of the current sample curve of circuit-breaker switching on-off process, quickly and accurately to high pressure open circuit
The failure of device is identified, but due to can only during the switching on and off of monitoring breaker signal, and high-tension switch gear
It is usually very low to act the frequency, it is difficult to realize the anticipation requirement of State-Inspect of High-Voltage Circuit；Certain position is moved to due to working as contact
When, mechanism overcomes resistance, and the acceleration capacity to contact is fixed, therefore it has been proposed that using stroke characteristic (instant m- position
Curve) or stroke curve in apparent case point be monitored, by moving target deviation calibration facility machine performance, but work as
Resistance (is influenced) when changing by environment, deformation or other factors, and touching cephalomotor speed, position and acceleration capacity all can be by shadow
It rings, so that high-tension switch gear acting characteristic deviates standard requirement.But this monitoring method is difficult to reflect equipment comprehensively
Operating status, and the directive property of characteristic quantity and indefinite.Later, high-tension switch gear machine performance was assessed by vibration signal
Method becomes the hot spot studied recently, but mechanical vibration wave transmission path in switchgear is complicated, rolls over, returns and penetrates serious, signal
Confidence level is not high, and state right judging rate is still to be improved, currently, such method still cannot be introduced into practical sizable application, and mechanism is grasped
Dynamic process is uncontrolled, and in addition current state monitoring sensors configured can only measure, increase system cost, cause parts increasing
It is more, increase system fault probability.Therefore, research direction is tended to pass through driving torque during high-tension switch gear actuating
Change to monitor on its machine performance.
Invention content
The purpose of the present invention is to provide a kind of high-tension switch gear machine performance monitoring method and devices, existing for solving
The problem for having technology high-voltage switch plant machinery status monitoring result right judging rate low.
To achieve the above object, the present invention provides a kind of high-tension switch gear machine performance monitoring method, including it is as follows
Step：
1) high-tension switch gear driving torque characteristic is obtained in real time；
2) standard torque of the high-tension switch gear driving torque characteristic of acquisition and high-tension switch gear normal condition is special
Property carries out matching comparison；
3) if the standard torque of the high-tension switch gear driving torque characteristic obtained and high-tension switch gear normal condition is special
The difference of property is less than the range of setting, then is judged as that high-tension switch gear machine performance is normal；If the high-voltage switch gear obtained is set
The difference of standby driving torque characteristic and the standard torque characteristic of high-tension switch gear normal condition is more than the range of setting, then judges
It is abnormal for high-tension switch gear machine performance.
Further, the high-tension switch gear driving torque characteristic is high-tension switch gear driving torque curve, described
The standard torque characteristic of high-tension switch gear normal condition is the standard torque curve of high-tension switch gear normal condition.
Further, high-tension switch gear driving torque is obtained by measuring or is indicated by the q shaft currents of servo motor.
Realize the further flexibility of the measurement method of high-tension switch gear driving torque.
In order to which whether the machine performance for judging high-tension switch gear promptly and accurately is normal, in step 3), by by high pressure
Switchgear driving torque curve and the standard torque curve of high-tension switch gear normal condition are compared, and torque exception is obtained
High-tension switch gear driving torque departure degree is put and calculates, by judging the high-tension switch gear driving torque departure degree
To determine high-tension switch gear machine performance.
In order to reduce high-tension switch gear machine performance monitoring condition requirement, to high-tension switch gear normal condition
Positive negative bias is arranged according to the perunit value range of setting in standard torque curve, the first curve and the second curve is obtained, if height presses off
When pass device drives torque curve is fallen in the envelope region that first curve and second curve are formed, then high pressure is judged
Switchgear driving torque is normal, further judges that high-tension switch gear machine performance is normal；If high-tension switch gear drives
When torque curve is fallen outside the envelope region that first curve and second curve are formed, then judge that high-tension switch gear drives
Dynamic torque is abnormal, further judges that high-tension switch gear machine performance is abnormal.
In order to improve the monitoring efficiency of high-tension switch gear machine performance, to high-tension switch gear driving torque curve and height
The standard torque curve of voltage switching station normal condition is carried out smooth and/or is filtered.
Further, the standard torque curve negotiating modeling and simulating of high-tension switch gear normal condition obtains.
The present invention also provides a kind of high-tension switch gear machine performance monitoring devices, including are used to that high-voltage switch gear to be driven to set
The standby torque drivers for generating torque, the torque drivers obtain high pressure in real time for being connect with high-tension switch gear
Switchgear driving torque characteristic；By the high-tension switch gear driving torque characteristic of acquisition and high-tension switch gear normal condition
Standard torque characteristic carries out matching comparison；If the high-tension switch gear driving torque characteristic obtained and the normal shape of high-tension switch gear
The difference of the standard torque characteristic of state is less than the range of setting, then is judged as that high-tension switch gear machine performance is normal；If obtaining
The difference of the high-tension switch gear driving torque characteristic taken and the standard torque characteristic of high-tension switch gear normal condition is more than to set
Fixed range is then judged as that high-tension switch gear machine performance is abnormal.
Further, the high-tension switch gear driving torque characteristic is high-tension switch gear driving torque curve, described
The standard torque characteristic of high-tension switch gear normal condition is the standard torque curve of high-tension switch gear normal condition.
Further, high-tension switch gear driving torque is obtained by measuring or is indicated by the q shaft currents of servo motor.
Realize the further flexibility of the measurement method of high-tension switch gear driving torque.
In order to which whether the machine performance for judging high-tension switch gear promptly and accurately is normal, high-tension switch gear drive is being judged
When whether dynamic torque characteristic and the difference of the standard torque characteristic of high-tension switch gear normal condition are more than the range of setting, pass through
High-tension switch gear driving torque curve and the standard torque curve of high-tension switch gear normal condition are compared, turned
Square abnormal point simultaneously calculates high-tension switch gear driving torque departure degree, by judging that the high-tension switch gear driving torque is inclined
High-tension switch gear machine performance is determined from degree.
In order to reduce high-tension switch gear machine performance monitoring condition requirement, to high-tension switch gear normal condition
Positive negative bias is arranged according to the perunit value range of setting in standard torque curve, the first curve and the second curve is obtained, if height presses off
When pass device drives torque curve is fallen in the envelope region that first curve and second curve are formed, then high pressure is judged
Switchgear driving torque is normal, further judges that high-tension switch gear machine performance is normal；If high-tension switch gear drives
When torque curve is fallen outside the envelope region that first curve and second curve are formed, then judge that high-tension switch gear drives
Dynamic torque is abnormal, further judges that high-tension switch gear machine performance is abnormal.
In order to improve the monitoring efficiency of high-tension switch gear machine performance, to high-tension switch gear driving torque curve and height
The standard torque curve of voltage switching station normal condition is carried out smooth and/or is filtered.
Further, the standard torque curve negotiating modeling and simulating of high-tension switch gear normal condition obtains.
The beneficial effects of the invention are as follows：
The present invention can monitor the various states ginseng of high-tension switch gear by the torque characteristics of acquisition high-tension switch gear
Number, realizes the whole monitoring to high-tension switch gear machine performance, is comprehensively reflected high-tension switch gear motion state
Key element meets the anticipation requirement of high-tension switch gear status monitoring, describes machine performance and state ginseng in all directions
Incidence relation between amount improves the right judging rate of high-tension switch gear machine performance monitoring result, is capable of detecting when high-voltage switch gear
The various failures that may occur of equipment.The method of the present invention realizes that the parts that the monitoring of high-tension switch gear uses are less,
Therefore simple in structure, it is easy to operate, reduce the probability of malfunction of high-tension switch gear.
Description of the drawings
Fig. 1 is that 126kv motors drive high-voltage circuitbreaker to be driven schematic diagram；
Fig. 2 is high-tension switch gear driving torque stroke curve schematic diagram；
Fig. 3 is the standard torque curve synoptic diagram for indicating high-tension switch gear normal condition；
Fig. 4 is the standard torque envelope of curve schematic diagram for indicating high-tension switch gear normal condition；
Fig. 5 is the contrast schematic diagram of practical q shaft currents curve and envelope.
Specific implementation mode
The specific implementation mode of the present invention is further described below in conjunction with the accompanying drawings：
High-tension switch gear in use can mechanical breakdown frequent occurrence, since mechanical breakdown is always to influence its confession
Therefore one of the main problem of electric reliability is very important to the monitoring of high-tension switch gear machine performance.The present invention carries
A kind of high-tension switch gear machine performance monitoring device is gone out, which includes for driving high-tension switch gear to generate torque
Torque drivers, torque drivers obtain high-tension switch gear driving torque in real time for being connect with high-tension switch gear
Characteristic；The standard torque characteristic of the high-tension switch gear driving torque characteristic of acquisition and high-tension switch gear normal condition is carried out
Matching compares；If the standard torque characteristic of the high-tension switch gear driving torque characteristic and high-tension switch gear normal condition obtained
Difference be less than the range of setting, then be judged as that high-tension switch gear machine performance is normal；If the high-tension switch gear obtained
The difference of driving torque characteristic and the standard torque characteristic of high-tension switch gear normal condition is more than the range of setting, then is judged as
High-tension switch gear machine performance is abnormal.
A kind of high-tension switch gear driving torque driving device as shown in Figure 1, using the permanent magnet synchronous servo electricity of 126kv
Machine 7 drives high-tension switch gear, the torque drivers to use jointed gear unit.Drive shaft is connected directly with rotor
Or be connected by the retarder of certain reduction ratio, position is fixed；Horizontal connecting lever 6 and 5 rigidity of drive shaft are ratcheting, and phase does not occur
To rotation；One end of insulated tension pole 3 is connected by connecting plate 4 with horizontal connecting lever 6, motion parts, the other end of insulated tension pole with touch
Head spring 2 connects, and touch spring belongs to motion parts, and motion parts have further included the component of connection function, for motion process
For calculating, it is believed that be exactly moving contact, because being limited by 1 mechanical structure of arc-chutes, movement locus is vertical line, forever
Magnetic-synchro motor is also associated with control system 8, and the state of permanent magnet synchronous motor is controlled by control system.When permanent magnet synchronous motor connects
When receiving separating brake order, rotor together with shaft make counterclockwise rotation, horizontal connecting lever, connecting rod gearing under, moving contact
It moves downward, separating brake starts.
The method that high-tension switch gear machine performance is monitored using above-mentioned high-tension switch gear machine performance monitoring device
The step of be：
1) high-tension switch gear driving torque characteristic is obtained in real time；
2) standard torque of the high-tension switch gear driving torque characteristic of acquisition and high-tension switch gear normal condition is special
Property carries out matching comparison；
3) if the standard torque of the high-tension switch gear driving torque characteristic obtained and high-tension switch gear normal condition is special
The difference of property is less than the range of setting, then is judged as that high-tension switch gear state is normal；If the high-tension switch gear obtained drives
The difference of dynamic torque characteristic and the standard torque characteristic of high-tension switch gear normal condition is more than the range of setting, then is judged as height
Voltage switching station abnormal state.
In the present embodiment, high-tension switch gear driving torque characteristic is high-tension switch gear driving torque curve, and height presses off
The standard torque characteristic for closing equipment normal condition is the standard torque curve of high-tension switch gear normal condition.
Further, high-tension switch gear driving torque is obtained by measuring or is indicated by the q shaft currents of servo motor.
Specifically, the driving torque of voltage switching station can directly measure turn during high-tension switch gear divide-shut brake by driving torque
Square change curve.But there are some defects for torque sensor：Torque sensor range of dynamic measurement, follows speed all at precision
There are higher requirement, cost higher, it is difficult to commercial application.
Driving torque can be indicated by the other parameters of servo-drive system, for example, being driven using permanent magnet synchronous servo motor high
When voltage switching station, the driving current i of servo motor is obtained by samplinga、ib、icWith position analog quantity, carry out PARK and
CLARKE converts to obtain d shaft currents IdWith q shaft currents Iq, the value and driving torque are proportional, IqDirectly reflect high-voltage switch gear
The driving torque of each point exports situation on stroke curve during equipment actuating.D shaft currents IdWith q shaft currents IqExpression formula be：
It is deformed into：
Wherein, angles of the θ between two-phase rotary axis d, q and two-phase static axial system α, β (a, b, c are equivalent), ia、ib、ic
Respectively A phases driving current, B phases driving current, the C phase driving currents of servo motor, IdFor the d shaft currents of servo motor, IqFor
The q shaft currents of servo motor.
When using durface mounted permanent magnet synchronous motor, I is enableddEqual to 0, then IqIt is directly proportional to driving torque, IqInstantaneous value direct ratio
It is used to drive the torque instantaneous value of load in current time.
Further, high-tension switch gear operating mechanism have servo ability, high-tension switch gear contact (or transmission output
Part) it is moved according to preset stroke curve, in motion process, when load resistance square changes, driving moment passes through position
Ring, speed ring and/or electric current loop closed loop is set to adjust.(or the characterization torque of high-tension switch gear driving torque curve is obtained in real time
Physical parameter curve), and with characterization high-tension switch gear normal condition standard torque curve (or characterization torque-demand physics
Parametric line) comparison, it obtains high-tension switch gear driving torque abnormal point and estimates torque departure degree, and then assess height and press off
Mechanical Reliability and the mechanical life of equipment are closed, and configures corresponding O&M strategy.Wherein, high-tension switch gear driving torque row
Journey curve is as shown in Fig. 2, the standard torque curve of high-tension switch gear normal condition is as shown in Figure 3.
The standard torque curve and high-tension switch gear driving torque driving curve of high-tension switch gear normal condition can roots
It carries out smoothly and/or is filtered according to needing, to promote the robustness of status assessment under high-energy or frequent sudden change conditions.
The standard torque curve of high-tension switch gear normal condition can directly be measured by the torque to high-tension switch gear
Obtain, can also by characterize torque other parameters measurement or be derived by, alternatively, it is also possible to be obtained by modeling and simulating
Arrive, due in real process, by correlation means obtain standard torque curve may there is also errors, therefore, with high pressure
Based on the standard torque curve of switchgear normal condition, positive negative bias is set according to perunit value 0.05-0.5, such as Fig. 4 institutes
Show, it is perunit value to choose 0.2, forms two new curves, respectively the first curve and the second curve.As shown in figure 5, working as high pressure
Switchgear driving torque driving curve is fallen in the envelope region of the first curve and the formation of the second curve, judges that high-voltage switch gear is set
This standby actuating torque is normal, when high-tension switch gear driving torque driving curve is fallen in the first curve and the formation of the second curve
When outside envelope region, it is judged as that this actuating torque is abnormal, to the Mechanical Reliability for assessing high-tension switch gear and mechanical longevity
Life.
The present invention can monitor the signal during the switching on and off of high-tension switch gear, and can also monitor high-voltage switch gear
Other state parameters of equipment, realize the whole monitoring to high-tension switch gear, are comprehensively reflected high-tension switch gear fortune
The key element of dynamic state meets the anticipation requirement of high-tension switch gear status monitoring, describes machine performance in all directions
And the incidence relation between state parameter, the right judging rate of high-tension switch gear machine performance monitoring result is improved, is capable of detecting when
The various failures that may occur of high-tension switch gear.The method of the present invention realizes zero that the monitoring of high-tension switch gear uses
Part is less, therefore simple in structure, easy to operate, reduces the probability of malfunction of high-tension switch gear.
Specific embodiment is presented above, but the present invention is not limited to embodiment described above.The present invention
Basic ideas be above-mentioned basic scheme, for those of ordinary skill in the art, introduction according to the present invention is designed each
The model of kind deformation, formula, parameter do not need to spend creative work.The case where not departing from the principle and spirit of the invention
Under to embodiment carry out variation, modification, replacement and deformation still fall in protection scope of the present invention.
Claims (10)
1. a kind of high-tension switch gear machine performance monitoring method, which is characterized in that include the following steps：
1) high-tension switch gear driving torque characteristic is obtained in real time；
2) by the standard torque characteristic of the high-tension switch gear driving torque characteristic of acquisition and high-tension switch gear normal condition into
Row matching compares；
If 3) the high-tension switch gear driving torque characteristic obtained and the standard torque characteristic of high-tension switch gear normal condition
Difference is less than the range of setting, then is judged as that high-tension switch gear machine performance is normal；If the high-tension switch gear obtained drives
The difference of dynamic torque characteristic and the standard torque characteristic of high-tension switch gear normal condition is more than the range of setting, then is judged as height
Voltage switching station machine performance is abnormal.
2. high-tension switch gear machine performance monitoring method according to claim 1, which is characterized in that the high-voltage switch gear
Device drives torque characteristics is high-tension switch gear driving torque curve, the standard torque of the high-tension switch gear normal condition
Characteristic is the standard torque curve of high-tension switch gear normal condition.
3. high-tension switch gear machine performance monitoring method according to claim 2, which is characterized in that high-tension switch gear
Driving torque is obtained by measuring or is indicated by the q shaft currents of servo motor.
4. high-tension switch gear machine performance monitoring method according to claim 2, which is characterized in that in step 3), lead to
It crosses and compares high-tension switch gear driving torque curve and the standard torque curve of high-tension switch gear normal condition, obtain
Torque abnormal point simultaneously calculates high-tension switch gear driving torque departure degree, by judging the high-tension switch gear driving torque
Departure degree determines high-tension switch gear machine performance.
5. high-tension switch gear machine performance monitoring method according to claim 4, which is characterized in that set to high-voltage switch gear
Positive negative bias is arranged according to the perunit value range of setting in the standard torque curve of standby normal condition, obtains the first curve and the second song
Line, if high-tension switch gear driving torque curve is fallen in the envelope region that first curve and second curve are formed
When, then judge that high-tension switch gear driving torque is normal, further judges that high-tension switch gear machine performance is normal；If high pressure
When switchgear driving torque curve is fallen outside the envelope region that first curve and second curve are formed, then height is judged
Voltage switching station driving torque is abnormal, further judges that high-tension switch gear machine performance is abnormal.
6. high-tension switch gear machine performance monitoring method according to claim 5, which is characterized in that set to high-voltage switch gear
Standby driving torque curve and the standard torque curve of high-tension switch gear normal condition are carried out smooth and/or are filtered.
7. high-tension switch gear machine performance monitoring method according to claim 2, which is characterized in that high-tension switch gear
The standard torque curve negotiating modeling and simulating of normal condition obtains.
8. a kind of high-tension switch gear machine performance monitoring device, which is characterized in that including being used to that high-tension switch gear to be driven to produce
The torque drivers of raw torque, the torque drivers obtain high-voltage switch gear in real time for being connect with high-tension switch gear
Device drives torque characteristics；By the standard of the high-tension switch gear driving torque characteristic and high-tension switch gear normal condition of acquisition
Torque characteristics carries out matching comparison；If the high-tension switch gear driving torque characteristic obtained and high-tension switch gear normal condition
The difference of standard torque characteristic is less than the range of setting, then is judged as that high-tension switch gear machine performance is normal；If obtaining
The difference of high-tension switch gear driving torque characteristic and the standard torque characteristic of high-tension switch gear normal condition is more than setting
Range is then judged as that high-tension switch gear machine performance is abnormal.
9. high-tension switch gear machine performance monitoring device according to claim 8, which is characterized in that the high-voltage switch gear
Device drives torque characteristics is high-tension switch gear driving torque curve, the standard torque of the high-tension switch gear normal condition
Characteristic is the standard torque curve of high-tension switch gear normal condition.
10. high-tension switch gear machine performance monitoring device according to claim 9, which is characterized in that high-voltage switch gear is set
Standby driving torque is obtained by measuring or is indicated by the q shaft currents of servo motor.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111337829A (en) * | 2020-04-03 | 2020-06-26 | 清华大学 | Motor detection method and device |
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