CN111679184A - Method for evaluating performance of isolating switch through motor current - Google Patents
Method for evaluating performance of isolating switch through motor current Download PDFInfo
- Publication number
- CN111679184A CN111679184A CN202010640900.8A CN202010640900A CN111679184A CN 111679184 A CN111679184 A CN 111679184A CN 202010640900 A CN202010640900 A CN 202010640900A CN 111679184 A CN111679184 A CN 111679184A
- Authority
- CN
- China
- Prior art keywords
- current
- isolating switch
- performance
- evaluating
- motor
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 238000000034 method Methods 0.000 title claims abstract description 50
- 230000007246 mechanism Effects 0.000 claims abstract description 29
- 238000011156 evaluation Methods 0.000 claims abstract description 26
- 230000007547 defect Effects 0.000 claims abstract description 17
- 230000005540 biological transmission Effects 0.000 claims description 12
- 230000008569 process Effects 0.000 claims description 12
- 230000008439 repair process Effects 0.000 claims description 5
- 230000002159 abnormal effect Effects 0.000 claims description 4
- 238000012360 testing method Methods 0.000 abstract description 6
- 230000008859 change Effects 0.000 abstract description 5
- 230000000875 corresponding effect Effects 0.000 description 13
- 230000009471 action Effects 0.000 description 9
- 238000004590 computer program Methods 0.000 description 6
- 238000013461 design Methods 0.000 description 4
- 238000012423 maintenance Methods 0.000 description 4
- 230000008878 coupling Effects 0.000 description 3
- 238000010168 coupling process Methods 0.000 description 3
- 238000005859 coupling reaction Methods 0.000 description 3
- 238000001514 detection method Methods 0.000 description 3
- 238000012545 processing Methods 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000004891 communication Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000005284 excitation Effects 0.000 description 2
- 230000006870 function Effects 0.000 description 2
- 238000009413 insulation Methods 0.000 description 2
- 230000033001 locomotion Effects 0.000 description 2
- 238000003491 array Methods 0.000 description 1
- 230000002596 correlated effect Effects 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 230000009977 dual effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 230000014509 gene expression Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000016507 interphase Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 230000004044 response Effects 0.000 description 1
- 230000002441 reversible effect Effects 0.000 description 1
- 238000005070 sampling Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 208000024891 symptom Diseases 0.000 description 1
- 230000001360 synchronised effect Effects 0.000 description 1
- 238000010998 test method Methods 0.000 description 1
Images
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/327—Testing of circuit interrupters, switches or circuit-breakers
- G01R31/3271—Testing of circuit interrupters, switches or circuit-breakers of high voltage or medium voltage devices
- G01R31/3272—Apparatus, systems or circuits therefor
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Arc-Extinguishing Devices That Are Switches (AREA)
Abstract
The invention provides a method for evaluating the performance of an isolating switch through motor current, and belongs to the field of testing and evaluating of the performance of the isolating switch. When the isolating switch is in a first running state, a first current waveform of the isolating switch operating mechanism in one time period is continuously acquired and used as a performance evaluation reference; when the isolating switch is in a second running state, acquiring a whole sequence or a partial sequence of a second current waveform of an isolating switch operating mechanism in real time in a period corresponding to the first current waveform; evaluating a second operating state of the disconnector on the basis of the full sequence or partial sequence. The invention can truly and comprehensively reflect the load condition of the isolating switch, judge the change trend of the equipment defects, effectively avoid the expansion of the defects and avoid the occurrence of faults.
Description
Technical Field
The invention belongs to the field of testing and evaluating of the performance of an isolating switch. And more particularly to testing of disconnector operating forces.
Background
The isolating switch is one of the most used high-voltage switch electric appliances and plays an isolating role in a circuit. Because the use amount is large, the requirement on the working reliability is high, and the influences on the design, the establishment and the safe operation of a substation and a power plant are large. When the isolating switch is in the separated position, the contacts have insulation distance meeting the specified requirements and obvious disconnection marks; switching devices capable of carrying current in normal loop conditions and current in abnormal conditions for a specified period of time, such as short-circuit current, when in the closed position. The isolating switch is generally used as a high-voltage isolating switch, namely an isolating switch with rated voltage of more than 1kV, the operating principle and the structure of the isolating switch are simple, but the isolating switch has large use amount and high requirement on working reliability, and has great influence on the design, the establishment and the safe operation of a substation and a power plant. The main characteristic of the isolating switch is that it has no arc-extinguishing capability, and can only open and close the circuit under the condition of no load current.
Generally, a group of isolating switches are respectively arranged on the front face and the rear face of the circuit breaker, and the purpose is to isolate the circuit breaker from a power supply to form an obvious breaking point; because the original circuit breaker adopts an oil circuit breaker which needs to be maintained frequently, two sides of the circuit breaker need to be provided with obvious breaking points so as to be beneficial to maintenance; in general, the outlet cabinet supplies power from the upper bus downwards through the switch cabinet, and a group of isolating switches are needed in front of the breaker to be isolated from a power supply.
The isolating switch is mainly used for reliably isolating a part needing power failure from a live part in the high-voltage distribution device so as to ensure the safety of maintenance work. The contacts of the isolating switch are completely exposed in the air and have obvious disconnection points, the isolating switch is not provided with an arc extinguishing device, and therefore the isolating switch cannot be used for cutting off load current or short-circuit current, otherwise, under the action of high voltage, the disconnection points generate strong electric arcs and are difficult to extinguish by themselves, even flashover (relative ground or interphase short circuit) can be caused, equipment is burnt, and personal safety is endangered, namely, a serious accident of pulling the isolating switch with load is caused. The isolating switch can also be used for carrying out switching operation of certain circuits so as to change the operation mode of the system. For example: in a dual bus circuit, a disconnector may be used to switch the circuit in operation from one bus to the other. And meanwhile, the circuit can be used for operating a circuit with small current.
In high-voltage switchgear, the quantity of Disconnecting Switches (DS) used is the largest, which in high-voltage networks serve to isolate lines and establish reliable insulation gaps, DS also being used for changing lines and changing bus wiring. The performance of the DS directly affects the safe operation of the power grid, and is one of the most important devices in the high-voltage power grid.
In the process of opening and closing the high-voltage isolating switch, faults such as opening and closing refusing, incomplete opening and closing, damage and deformation of a transmission component and the like are often caused by the high or low speed of an operating mechanism, and the operating mechanism of the high-voltage isolating switch adopts a spring, hydraulic or pneumatic technology and has the defects of more connecting rods and complex structure. In order to enable a switch contact to have good controllability in the motion process, improve the opening and closing reliability of the switch contact and reduce operation faults, a novel technology provides a direct current motor (BLDCM) operating mechanism of a high-voltage isolating switch on the basis of the research of a motor operating mechanism of a high-voltage circuit breaker. And according to the control signal, the movement of the contact in the switching-on and switching-off process is driven and controlled by the direct current motor.
The main defects of the isolating switch in the current operation process are that the operation is not flexible and the conductive loop generates heat. The data show that the mechanical fault accounts for more than 30 percent, the main performance of the mechanical fault is firstly transmission jamming, then opening and closing are not in place, the most serious is deformation and breakage of transmission parts, and the early symptoms of the faults are increased operating force. Therefore, the operating force of the isolating switch is tested at regular intervals, whether the isolating switch has defects or not can be diagnosed as soon as possible, and the defects are processed in a targeted mode, so that accidents are avoided.
There is a clear specification for the disconnector operating force in the national standard GB1985-2014 "high voltage ac disconnector and earthing switch", if more than one revolution (e.g. operating handle) is required to operate the disconnector or earthing switch, the force required should not be more than 60N, and the maximum value of the operating force is allowed to be 120N within a revolution of at most 10% of the total number of revolutions required. However, in actual work, an effective and simple test method capable of truly and comprehensively reflecting the load condition of the isolating switch is not available.
Disclosure of Invention
The invention aims to provide a method for evaluating the mechanical performance of an isolating switch through motor current, which can truly and comprehensively reflect the load condition of the isolating switch.
The invention provides a method for evaluating the performance of an isolating switch through motor current, which comprises the following steps of continuously acquiring a first current waveform of an isolating switch operating mechanism in a period of time when the isolating switch is in a first running state, and using the first current waveform as a performance evaluation reference; when the isolating switch is in a second running state, acquiring a whole sequence or a partial sequence of a second current waveform of an isolating switch operating mechanism in real time in a period corresponding to the first current waveform; evaluating a second operating state of the disconnector on the basis of the full sequence or partial sequence.
An embodiment of an aspect of the present invention includes the following steps S101 to S104.
S101, acquiring a first current waveform of the isolating switch operating mechanism in a first operating state of the isolating switch, and using the first current waveform as a performance evaluation reference of the isolating switch in other operating states.
And S102, extracting a standard parameter from the first current waveform. Preferably, in some embodiments, the standard parameters include one or more of a starting current, an average current, and a charging period.
And S103, acquiring a second current waveform of the isolating switch operating mechanism in a second operating state of the isolating switch, and extracting a real-time value of an evaluation parameter corresponding to the standard parameter in the S102 from the second current waveform.
And S104, comparing the real-time values of the evaluation parameters with the corresponding standard parameters, and outputting defect repair prompt information of the isolating switch if the difference value between the real-time value of one evaluation parameter and the corresponding standard parameter exceeds a preset threshold value. In some embodiments, the defect repair prompt includes a motor failure prompt, a drive train jam prompt, or a drive chain disconnection prompt.
Preferably, in some embodiments, the current sensor providing current information in the first current waveform and the second current waveform is an open hall current sensor measuring a motor drive current in the actuator.
In some embodiments, the first operating state is a state before the disconnector is put into operation, and the second operating state is a state after the disconnector is put into operation.
In some embodiments, the starting current is a peak value of a current at the moment of electrifying the driving motor in the operating mechanism.
In some embodiments, the average current is an effective value of current during operation of a drive motor in the actuator.
In some embodiments, the charging period is the entire time period from power-up to power-down of the motor.
In some embodiments, the current sensor providing current information in the first current waveform and the second current waveform is an open hall current sensor measuring a motor drive current in the actuator.
In some embodiments, when acquiring one real-time data in the second current waveform, if the second operation state of the isolating switch is evaluated to be abnormal, the acquisition of other real-time data in the second current waveform is stopped.
The technical scheme of the invention has the beneficial effects that:
in the devices of some implementation method embodiments, only the working current signals of the driving motor in the operating mechanism need to be acquired, and no complex sensor or synchronous signal is needed, so that the installation is convenient, the device can be arranged and installed in the operation process of the circuit breaker, particularly, the power failure is not needed, and the normal operation of a power grid cannot be influenced by the maintenance and evaluation.
In the devices of some implementation method embodiments, because the method provided by the invention has concise state evaluation such as motor fault prompt, transmission system jam prompt or transmission chain disconnection prompt, the state of the device is judged through current change without disassembling components on the isolating switch, and the devices can realize remote evaluation on the specific isolating switch performance through network connection.
In the devices of some implementation method embodiments, the working current signals of the driving motor are acquired online in real time, so that information loss in an offline state is avoided.
In some implementation method embodiments, the occurrence of the fault can be avoided by performing trend prejudgment on comparison of a plurality of second operation states, and the traditional detection means only detects the current equipment state and cannot predict the change trend of the equipment defect.
Drawings
FIG. 1 is a schematic diagram of a motor current test according to an embodiment of the present invention;
FIG. 2 is a flow chart of the evaluation step in one embodiment of the present invention;
FIG. 3 is a diagram illustrating a plurality of current waveforms in accordance with an embodiment of the present invention.
Detailed Description
Firstly, it should be noted that the driving motor of the present invention drives the contact of the disconnecting switch to move in the opening and closing processes through the transmission mechanism, and generally, the driving motor which operates according to the opening signal or the closing signal provided by the system may be integrated with the disconnecting switch or may be additionally installed in the later stage.
In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present application, but the present application may be practiced in other ways than those described herein, and it will be apparent to those of ordinary skill in the art that the present application is not limited to the specific embodiments disclosed below.
It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments according to the present application. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, and it should be understood that when the terms "comprises" and/or "comprising" are used in this specification, they specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof, unless the context clearly indicates otherwise.
The relative arrangement of the components and steps, the numerical expressions, and numerical values set forth in these embodiments do not limit the scope of the present application unless specifically stated otherwise. Meanwhile, it should be understood that the sizes of the respective portions shown in the drawings are not drawn in an actual proportional relationship for the convenience of description. Techniques, methods, and apparatus known to those of ordinary skill in the relevant art may not be discussed in detail but are intended to be part of the specification where appropriate. In all examples shown and discussed herein, any particular value should be construed as merely illustrative, and not limiting. Thus, other examples of the exemplary embodiments may have different values. It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, further discussion thereof is not required in subsequent figures.
In the description of the present application, it is to be understood that the orientation or positional relationship indicated by the directional terms such as "front, rear, upper, lower, left, right", "lateral, vertical, horizontal" and "top, bottom", etc., are generally based on the orientation or positional relationship shown in the drawings, and are used for convenience of description and simplicity of description only, and in the case of not making a reverse description, these directional terms do not indicate and imply that the device or element being referred to must have a particular orientation or be constructed and operated in a particular orientation, and therefore, should not be considered as limiting the scope of the present application; the terms "inner and outer" refer to the inner and outer relative to the profile of the respective component itself.
Spatially relative terms, such as "above … …," "above … …," "above … …," "above," and the like, may be used herein for ease of description to describe one device or feature's spatial relationship to another device or feature as illustrated in the figures. It will be understood that the spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if a device in the figures is turned over, devices described as "above" or "on" other devices or configurations would then be oriented "below" or "under" the other devices or configurations. Thus, the exemplary term "above … …" can include both an orientation of "above … …" and "below … …". The device may be otherwise variously oriented (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.
It should be noted that the terms "first", "second", and the like are used to define a concept, and are used only for convenience of distinguishing the corresponding concepts, and the terms have no special meanings unless otherwise stated, and therefore, should not be construed as limiting the scope of the present application.
In the following description, for purposes of explanation and not limitation, specific details are set forth, such as particular system structures, techniques, etc. in order to provide a thorough understanding of the embodiments of the invention. It will be apparent, however, to one skilled in the art that the present invention may be practiced in other embodiments that depart from these specific details. In other instances, detailed descriptions of well-known systems, devices, circuits, and methods are omitted so as not to obscure the description of the present invention with unnecessary detail.
In order to explain the technical means of the present invention, the following description will be given by way of specific examples.
In various embodiments of the present invention, a method for evaluating the performance of an isolator by a motor current is included, wherein when the isolator is in a first operation state, a first current waveform of an isolator operating mechanism in a period of time is continuously obtained and used as a performance evaluation reference; when the isolating switch is in a second running state, acquiring a whole sequence or a partial sequence of a second current waveform of an isolating switch operating mechanism in real time in a period corresponding to the first current waveform; evaluating a second operating state of the disconnector on the basis of the full sequence or partial sequence. In the invention, the operation state refers to that in the whole life cycle of an isolating switch, all indexes of the switch performance of the isolating switch are considered to be a continuously changing process before a fault occurs, and basically no sudden change exists, so that all indexes of the switch performance of the isolating switch are basically unchanged in a short time period, such as a plurality of switching action periods, days, weeks, months and the like, and all indexes of the switch performance are basically unchanged, so that the state that all indexes of the switch performance are basically unchanged is an operation state of the isolating switch. The invention takes into account that a small time series of current waveforms of the actuator, for example, a time series of current magnitudes in 30s, which are collected at any given point in time, are correlated with the current operating state of the disconnector, in particular when the time series of time periods completely covers an operating action. In different embodiments, the operation action can be a mechanical action such as a switching-off action, a switching-on action, a protection trip and the like. The correspondence of the first current waveform with one second current waveform in the present invention means that the time lengths are the same, and in the respective time series, the start points of the same drive motor performing the operation action based on the same drive signal are aligned at the same time points from the start time span thereof, that is, based on the timing of the drive signal as the excitation.
In the first aspect, as shown in fig. 1, a possible implementation basis of the method embodiment of the present invention is that, for a driving motor in the disconnecting switch operating mechanism, a current sensor for collecting a response current of the driving motor based on a specified driving signal is provided in a driving loop of the driving motor, in one embodiment, a power supply of the driving motor actually uses a control voltage of the driving motor as an excitation, and the current sensor obtains a real-time current to form different current waveforms according to an operating state of the driving motor under different operating conditions. One working condition of the driving motor can be that the driving transmission mechanism carries out switching-on operation on the isolating switch, and can also be that the driving transmission mechanism carries out switching-off operation on the isolating switch. Those skilled in the art can design other electrical structures and mechanical structures as the implementation basis of the embodiment of the method according to the present invention according to the description of the embodiment of the present invention, and these electrical structures and mechanical structures as the implementation basis are also considered as a specific embodiment of the present invention when they are used for implementing the method according to the present invention to achieve the effect of the method according to the present invention.
In the second aspect, based on the first aspect, an embodiment of the present invention includes the following steps S101 to S104.
S101, acquiring a first current waveform of the isolating switch operating mechanism in a first operating state of the isolating switch, and using the first current waveform as a performance evaluation reference of the isolating switch in other operating states.
And S102, extracting a standard parameter from the first current waveform. Preferably, in some embodiments, the standard parameters include one or more of a starting current, an average current, and a charging period.
And S103, acquiring a second current waveform of the isolating switch operating mechanism in a second operating state of the isolating switch, and extracting a real-time value of an evaluation parameter corresponding to the standard parameter in the S102 from the second current waveform.
And S104, comparing the real-time values of the evaluation parameters with the corresponding standard parameters, and outputting defect repair prompt information of the isolating switch if the difference value between the real-time value of one evaluation parameter and the corresponding standard parameter exceeds a preset threshold value. In some embodiments, the defect repair prompt includes a motor failure prompt, a drive train jam prompt, or a drive chain disconnection prompt.
In this embodiment, the current sensor providing the current information in the first current waveform and the second current waveform is an open hall current sensor measuring the driving current of the motor in the actuator.
Third aspect, according to the first aspect, as shown in fig. 2, an embodiment of the present invention includes the following steps S201 to S207.
S201, before operation, the isolating switch is operated to obtain a standard current waveform.
The embodiment is firstly tested before the equipment is put into operation, and the current standard waveform is obtained. This standard waveform serves as a comparison waveform for the current in the later run phase. (or other stages that identify criteria that may be used as a reference).
S202, acquiring a reference value through a standard waveform: starting current I0Average current IwAnd a charging time period T0。
From the standard waveform, a standard reference value is extracted: starting current I0Average current IwTime length of electrification T0. The starting current is the peak value of the current at the moment of electrifying the motor, the average current is the effective value of the current in the running process of the motor, and the electrification time is the whole time period from electrifying to powering off of the motor.
S203, setting a threshold value delta I0、ΔIwAnd Δ T0。
Setting threshold values of starting current, average current and electrified duration according to different types of isolating switches: delta I0、ΔIw、ΔT0。
And S204, acquiring a current waveform in the commissioning period.
S205, acquiring a real-time value: starting current i0Average current iwAnd a charging time period t0。
Acquiring a current waveform of equipment in operation, and extracting a real-time value according to a standard reference value extraction method: starting current i0Average current iwTime period t of charging0。
S206, calculating the real-time variation and judging whether | i is satisfied0-I0|>ΔI0、|iw-Iw|>ΔIwOr | t0-T0|>ΔT0。
S207, if the judgment condition in the S206 is met, outputting defect overhaul prompt information to prompt overhaul; otherwise, S204 is continuously executed to obtain a new current waveform for the commissioning period.
And comparing the real-time values of all the parameters with the standard values, and if the difference value exceeds the set threshold range, indicating that the isolating switch is abnormal in the action process and needs to be overhauled. Otherwise, testing and sampling are continued to ensure that problems are found early.
If the starting current exceeds the threshold value, the problem of the motor is indicated; if the average current exceeds the threshold value, the load of the motor is increased, and whether the transmission system has the defects of jamming and the like is checked; and if the charged time exceeds the threshold value, checking whether the transmission chain has the defects of disjointing and the like.
In a fourth aspect, based on the embodiments of the second aspect or the third aspect, the invention specifically describes how the invention evaluates a second operating state of the disconnector according to the full sequence or the partial sequence.
In this embodiment, as shown in fig. 3, a sequence a is two first current waveforms stored in the apparatus, that is, standard current waveforms, a first current waveform corresponding to a switching-off operation is arranged above the apparatus, a first current waveform corresponding to a switching-on operation is arranged below the apparatus, and a sequence B is a second current waveform obtained by the apparatus in the same second operation state or two second operation states, that is, a real-time current waveform in operation of the apparatus.
In one embodiment of the invention, the invention provides a high-voltage circuit breaker stroke detection device, which carries out switch performance evaluation on a high-voltage circuit breaker and isolating switches matched with the two sides of the high-voltage circuit breaker by using the method. The stroke detection device is provided with three current signal input ends respectively connected with current sensors A1, A2 and A3 of a first disconnecting switch operating mechanism motor driving circuit, a high-voltage breaker operating mechanism motor driving circuit and the first disconnecting switch operating mechanism motor driving circuit respectively, and a processor is configured to implement the following method steps on the current sensors A1, A2 and A3 respectively so as to realize the respective switch performance evaluation of three switch devices: the current standard waveform is acquired before the device is put into operation (or other stages deemed to be reference standards). The standard waveform is used as a reference object of the later-stage operation equipment; extracting standard parameters from the standard waveform, wherein the standard parameters comprise starting current, average current and charged time; extracting standard parameters from the standard waveform, wherein the standard parameters comprise starting current, average current and charged time; and acquiring a real-time current waveform during the operation of the equipment, and extracting a real-time value of the evaluation parameter. And 8, comparing the real-time value of the evaluation parameter with the standard value, and if the difference value exceeds the threshold value, judging that the tested disconnecting switch has defects and performing maintenance. In the embodiment, the mechanical performance of the corresponding switch of the current sensor is evaluated through the motor current, and the provided device for measuring the motor current is used for online testing and real-time acquisition. The current sensor for collecting current waveforms is a Hall sensor, and the structural form is open type. The evaluation standard related in the embodiment is formulated according to the isolating switches of different models and different operation stages, and different switch standards are not unique.
The method of the present invention may be used as a configuration method of a Processor, where the Processor may be a Central Processing Unit (CPU), or may be other general purpose processors, Digital Signal Processors (DSP), Application Specific Integrated Circuits (ASIC), Field Programmable Gate Arrays (FPGA) or other Programmable logic devices, discrete Gate or transistor logic devices, discrete hardware components, and so on. A general purpose processor may be a microprocessor or the processor may be any conventional processor or the like.
The storage or saving referred to in the method of the present invention refers to the storage of the data in a serialized or digitized manner in a storage, which may be an internal storage unit of the terminal device, such as a hard disk or a memory of the terminal device. The memory may also be an external storage device of the terminal device, such as a plug-in hard disk, a Smart Media Card (SMC), a Secure Digital (SD) Card, a Flash memory Card (Flash Card), and the like, which are equipped on the bidding terminal device for multi-party comprehensive evaluation. Further, the memory may also include both an internal storage unit and an external storage device of the terminal device. The memory is used for storing the computer program and other programs and data required by the terminal device. The memory may also be used to temporarily store data that has been output or is to be output.
It is obvious to those skilled in the art that for convenience and simplicity of description, the foregoing steps and modules are merely illustrated for convenience and simplicity, and in practical applications, the foregoing function distribution may be performed by different functional units and modules according to needs, that is, the internal structure of the apparatus is divided into different functional units or modules to perform all or part of the functions described above. Each functional unit and module in the embodiments may be integrated in one processing unit, or each unit may exist alone physically, or two or more units are integrated in one unit, and the integrated unit may be implemented in a form of hardware, or in a form of software functional unit. In addition, specific names of the functional units and modules are only for convenience of distinguishing from each other, and are not used for limiting the protection scope of the present application. The specific working processes of the units and modules in the system may refer to the corresponding processes in the foregoing method embodiments, and are not described herein again.
Those of ordinary skill in the art will appreciate that the various illustrative elements and algorithm steps described in connection with the embodiments disclosed herein may be implemented as electronic hardware or combinations of computer software and electronic hardware. Whether such functionality is implemented as hardware or software depends upon the particular application and design constraints imposed on the implementation. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present invention.
In the embodiments provided in the present invention, it should be understood that the disclosed apparatus and method may be implemented in other ways. For example, the above-described system embodiments are merely illustrative, and for example, the division of the modules or units is only one logical division, and there may be other divisions when actually implemented, for example, a plurality of units or components may be combined or may be integrated into another system, or some features may be omitted, or not executed. In addition, the shown or discussed mutual coupling or direct coupling or communication connection may be an indirect coupling or communication connection through some interfaces, devices or units, and may be in an electrical, mechanical or other form.
The implementation units as separate steps may or may not be physically separate, and components displayed as units may or may not be physical units, may be located in one place, or may also be distributed on a plurality of network units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of the embodiment.
In addition, functional units in the embodiments of the present invention may be integrated into one processing unit, or each unit may exist alone physically, or two or more units are integrated into one unit. The integrated unit can be realized in a form of hardware, and can also be realized in a form of a software functional unit.
The integrated modules/units, if implemented in the form of software functional units and sold or used as separate products, may be stored in a computer readable storage medium. Based on such understanding, all or part of the flow of the method according to the embodiments of the present invention may also be implemented by a computer program, which may be stored in a computer-readable storage medium, and when the computer program is executed by a processor, the steps of the method embodiments may be implemented. Wherein the computer program comprises computer program code, which may be in the form of source code, object code, an executable file or some intermediate form, etc. The computer-readable medium may include: any entity or device capable of carrying the computer program code, recording medium, usb disk, removable hard disk, magnetic disk, optical disk, computer Memory, Read-Only Memory (ROM), Random Access Memory (RAM), electrical carrier wave signals, telecommunications signals, software distribution medium, and the like. It should be noted that the computer readable medium may contain other components which may be suitably increased or decreased as required by legislation and patent practice in jurisdictions, for example, in some jurisdictions, computer readable media which may not include electrical carrier signals and telecommunications signals in accordance with legislation and patent practice.
The above-mentioned embodiments are only used for illustrating the technical solutions of the present invention, and not for limiting the same; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; such modifications and substitutions do not substantially depart from the spirit and scope of the embodiments of the present invention, and are intended to be included within the scope of the present invention.
Claims (10)
1. A method for evaluating the performance of a disconnector by means of the motor current, characterized in that: when the isolating switch is in a first running state, continuously acquiring a first current waveform of the isolating switch operating mechanism in a period of time as a performance evaluation reference; when the isolating switch is in a second running state, acquiring a whole sequence or a partial sequence of a second current waveform of an isolating switch operating mechanism in real time in a period corresponding to the first current waveform; evaluating a second operating state of the disconnector on the basis of the full sequence or partial sequence.
2. The method for evaluating the performance of a disconnector by means of motor current according to claim 1, characterized in that it comprises the following steps S101 to S104:
s101, acquiring a first current waveform of an operating mechanism of the isolating switch in a first operating state of the isolating switch, and using the first current waveform as a performance evaluation reference of the isolating switch in other operating states;
s102, extracting a standard parameter from the first current waveform;
s103, acquiring a second current waveform of the isolating switch operating mechanism in a second operating state of the isolating switch, and extracting a real-time value of an evaluation parameter corresponding to the standard parameter in the S102 from the second current waveform;
and S104, comparing the real-time values of the evaluation parameters with the corresponding standard parameters, and outputting defect repair prompt information of the isolating switch if the difference value between the real-time value of one evaluation parameter and the corresponding standard parameter exceeds a preset threshold value.
3. The method of evaluating the performance of a disconnector by motor current according to claim 2, characterized in that: step S102 includes one or more of starting current, average current and charging time.
4. Method for evaluating the performance of a disconnector by means of motor current according to claim 3, characterized in that: and step S104, the defect overhaul prompt message comprises a motor fault prompt, a transmission system jam prompt or a transmission chain disjointing prompt.
5. The method of evaluating the performance of a disconnector by motor current according to claim 1, characterized in that: the first operation state is a state before the disconnecting switch is put into operation, and the second operation state is a state after the disconnecting switch is put into operation.
6. Method for evaluating the performance of a disconnector by means of motor current according to claim 3, characterized in that: the starting current is the peak value of the current at the moment of electrifying the driving motor in the operating mechanism.
7. Method for evaluating the performance of a disconnector by means of motor current according to claim 3, characterized in that: the average current is an effective value of the current in the operation process of a driving motor in the operating mechanism.
8. Method for evaluating the performance of a disconnector by means of motor current according to claim 3, characterized in that: the charging time is the whole time period from power-on to power-off of the motor.
9. The method of evaluating the performance of a disconnector by motor current according to claim 1, characterized in that: the current sensor providing current information in the first current waveform and the second current waveform is an open hall current sensor measuring motor drive current in the actuator.
10. The method of evaluating the performance of a disconnector by motor current according to claim 1, characterized in that: and when one real-time data in the second current waveform is acquired, if the second operation state of the isolating switch is evaluated to be abnormal, stopping acquiring other real-time data in the second current waveform.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010640900.8A CN111679184A (en) | 2020-07-06 | 2020-07-06 | Method for evaluating performance of isolating switch through motor current |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010640900.8A CN111679184A (en) | 2020-07-06 | 2020-07-06 | Method for evaluating performance of isolating switch through motor current |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111679184A true CN111679184A (en) | 2020-09-18 |
Family
ID=72457303
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010640900.8A Pending CN111679184A (en) | 2020-07-06 | 2020-07-06 | Method for evaluating performance of isolating switch through motor current |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111679184A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113341308A (en) * | 2021-04-19 | 2021-09-03 | 云南电网有限责任公司临沧供电局 | Method and system for judging action characteristics of isolating switch |
| CN113358348A (en) * | 2021-06-25 | 2021-09-07 | 西安西电高压开关操动机构有限责任公司 | Clutch failure detection method, system, equipment and medium based on current characteristics |
| CN113533841A (en) * | 2021-06-08 | 2021-10-22 | 云南电网有限责任公司红河供电局 | Non-invasive detection method for power of high-voltage isolating switch driving motor |
| CN114325365A (en) * | 2021-11-26 | 2022-04-12 | 国网辽宁省电力有限公司电力科学研究院 | Method for evaluating dynamic characteristics of isolating switch in GIS |
Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201440110U (en) * | 2009-06-30 | 2010-04-21 | 河南省电力公司商丘供电公司 | Mechanical property test system of integrative breaker |
| CN104407286A (en) * | 2014-11-21 | 2015-03-11 | 国家电网公司 | Method for monitoring mechanical states of high-voltage isolating switches and emitting warning |
| CN106680700A (en) * | 2016-11-25 | 2017-05-17 | 云南电网有限责任公司电力科学研究院 | Isolation switch intelligence diagnosis system and method thereof |
| CN108318810A (en) * | 2017-12-27 | 2018-07-24 | 国网北京市电力公司 | High voltage isolator fault determination method and device |
| CN108535649A (en) * | 2018-04-19 | 2018-09-14 | 国家电网公司 | A kind of disconnecting switch jam faults diagnostic method and device based on driving motor electric current |
| CN109814005A (en) * | 2017-11-20 | 2019-05-28 | 云南电网有限责任公司玉溪供电局 | A kind of cable insulation defect recognition and localization method and system |
| CN110174613A (en) * | 2019-06-21 | 2019-08-27 | 国网西藏电力有限公司拉萨供电公司 | A kind of state monitoring apparatus and method of disconnecting switch |
| CN110456299A (en) * | 2019-08-21 | 2019-11-15 | 三峡大学 | A kind of secondary winding in current transformer inter-turn short circuit failure on-line detecting method |
| CN110780192A (en) * | 2019-10-31 | 2020-02-11 | 国网河北省电力有限公司电力科学研究院 | Method for evaluating health state of energy storage device of high-voltage circuit breaker based on energy storage current analysis |
-
2020
- 2020-07-06 CN CN202010640900.8A patent/CN111679184A/en active Pending
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201440110U (en) * | 2009-06-30 | 2010-04-21 | 河南省电力公司商丘供电公司 | Mechanical property test system of integrative breaker |
| CN104407286A (en) * | 2014-11-21 | 2015-03-11 | 国家电网公司 | Method for monitoring mechanical states of high-voltage isolating switches and emitting warning |
| CN106680700A (en) * | 2016-11-25 | 2017-05-17 | 云南电网有限责任公司电力科学研究院 | Isolation switch intelligence diagnosis system and method thereof |
| CN109814005A (en) * | 2017-11-20 | 2019-05-28 | 云南电网有限责任公司玉溪供电局 | A kind of cable insulation defect recognition and localization method and system |
| CN108318810A (en) * | 2017-12-27 | 2018-07-24 | 国网北京市电力公司 | High voltage isolator fault determination method and device |
| CN108535649A (en) * | 2018-04-19 | 2018-09-14 | 国家电网公司 | A kind of disconnecting switch jam faults diagnostic method and device based on driving motor electric current |
| CN110174613A (en) * | 2019-06-21 | 2019-08-27 | 国网西藏电力有限公司拉萨供电公司 | A kind of state monitoring apparatus and method of disconnecting switch |
| CN110456299A (en) * | 2019-08-21 | 2019-11-15 | 三峡大学 | A kind of secondary winding in current transformer inter-turn short circuit failure on-line detecting method |
| CN110780192A (en) * | 2019-10-31 | 2020-02-11 | 国网河北省电力有限公司电力科学研究院 | Method for evaluating health state of energy storage device of high-voltage circuit breaker based on energy storage current analysis |
Non-Patent Citations (1)
| Title |
|---|
| 保定天威保变电气股份有限公司: "《变压器试验技术》", 机械工业出版社, pages: 714 * |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113341308A (en) * | 2021-04-19 | 2021-09-03 | 云南电网有限责任公司临沧供电局 | Method and system for judging action characteristics of isolating switch |
| CN113341308B (en) * | 2021-04-19 | 2023-04-18 | 云南电网有限责任公司临沧供电局 | Method and system for judging action characteristics of isolating switch |
| CN113533841A (en) * | 2021-06-08 | 2021-10-22 | 云南电网有限责任公司红河供电局 | Non-invasive detection method for power of high-voltage isolating switch driving motor |
| CN113358348A (en) * | 2021-06-25 | 2021-09-07 | 西安西电高压开关操动机构有限责任公司 | Clutch failure detection method, system, equipment and medium based on current characteristics |
| CN113358348B (en) * | 2021-06-25 | 2023-09-19 | 西安西电高压开关操动机构有限责任公司 | Clutch failure detection method, system, equipment and medium based on current characteristics |
| CN114325365A (en) * | 2021-11-26 | 2022-04-12 | 国网辽宁省电力有限公司电力科学研究院 | Method for evaluating dynamic characteristics of isolating switch in GIS |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN111679184A (en) | Method for evaluating performance of isolating switch through motor current | |
| CN107843800B (en) | Power supply network monitoring method, device and system | |
| CN107171431B (en) | Uninterrupted power regulating equipment, uninterrupted power regulating system and uninterrupted power regulating control method | |
| CN203825164U (en) | Detection platform for DC circuit breaker | |
| CN202513561U (en) | Arc light protection system of high-voltage switch cabinet | |
| CN103457247A (en) | Multi-level full-range selective coordination and protection technology of low-voltage system | |
| JP2010233322A (en) | Device and method for switch batch-monitoring, and program | |
| CN115308589A (en) | Circuit breaker fault monitoring system, monitoring method and device | |
| CN111880083A (en) | Uninterrupted residual current test method and device and residual current protection device | |
| CN211785955U (en) | Mechanical characteristic monitoring system for switch cabinet circuit breaker | |
| CN105261530B (en) | A kind of more strokes of breaker realize circuit and control method | |
| CN202794462U (en) | Intelligent fault diagnosis device for opening and closing coils | |
| CN106877274B (en) | A kind of guard method of the control circuit of high-voltage circuit breaker intelligence burn-out-proof module based on DSP | |
| CN102169769A (en) | Conductive contact surface performance online diagnosing and repairing system and using method thereof | |
| CN110849611B (en) | Method for on-line detection of mechanical characteristics of circuit breaker by using switch radiation field | |
| CN114498914A (en) | Intelligent substation synthesizes monitored control system | |
| Pan et al. | Summarize on application of arc protection device in substation | |
| CN204166079U (en) | Secondary loop of breaker wiring testing device | |
| CN2879407Y (en) | Fast exit module having hardware self-holding function | |
| CN104505823A (en) | Method for power maintenance through transient power stop and transient stop selective reclosing circuit | |
| Kaiser et al. | A Comprehensive Approach for Safety in DC-Microgrids | |
| Grattan et al. | Integrating switchgear breakers and contactors into a safety instrumented function | |
| CN111443281A (en) | Electrical blocking device and circuit breaker or isolating switch | |
| CN202204671U (en) | High-voltage circuit breaker mechanical feature detection device | |
| CN203025325U (en) | Auxiliary circuit for rapidly finding motor faults |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20200918 |
|
| RJ01 | Rejection of invention patent application after publication |