CN108717151A - A kind of power grid fault detection system - Google Patents
A kind of power grid fault detection system Download PDFInfo
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- CN108717151A CN108717151A CN201810544404.5A CN201810544404A CN108717151A CN 108717151 A CN108717151 A CN 108717151A CN 201810544404 A CN201810544404 A CN 201810544404A CN 108717151 A CN108717151 A CN 108717151A
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- Prior art keywords
- power grid
- cable
- measuring device
- failure
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Classifications
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- 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
- G01R31/08—Locating faults in cables, transmission lines, or networks
- G01R31/081—Locating faults in cables, transmission lines, or networks according to type of conductors
- G01R31/086—Locating faults in cables, transmission lines, or networks according to type of conductors in power transmission or distribution networks, i.e. with interconnected conductors
-
- 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
- G01R31/08—Locating faults in cables, transmission lines, or networks
- G01R31/081—Locating faults in cables, transmission lines, or networks according to type of conductors
- G01R31/083—Locating faults in cables, transmission lines, or networks according to type of conductors in cables, e.g. underground
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y04—INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
- Y04S—SYSTEMS INTEGRATING TECHNOLOGIES RELATED TO POWER NETWORK OPERATION, COMMUNICATION OR INFORMATION TECHNOLOGIES FOR IMPROVING THE ELECTRICAL POWER GENERATION, TRANSMISSION, DISTRIBUTION, MANAGEMENT OR USAGE, i.e. SMART GRIDS
- Y04S10/00—Systems supporting electrical power generation, transmission or distribution
- Y04S10/50—Systems or methods supporting the power network operation or management, involving a certain degree of interaction with the load-side end user applications
- Y04S10/52—Outage or fault management, e.g. fault detection or location
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Testing Of Short-Circuits, Discontinuities, Leakage, Or Incorrect Line Connections (AREA)
Abstract
The invention discloses a kind of power grid fault detection systems, including：The multiple power grid measuring devices being distributed in the power grid, each power grid measuring device includes at least one of current metering sensor and voltage measurement sensor, and the power grid measuring device is for measuring at least one of current measurement value and voltage measuring value to form multiple measured values with each time of origin；At least one computing device is communicably coupled to the multiple power grid measuring device and is configured as receiving the multiple measured value and their own time of origin from the multiple power grid measuring device；Wherein described at least one computing device is configured as according to measured value described at least one rule analysis to detect electric network fault, wherein the rule be configured as fault type is associated at least one of the measured value.
Description
Technical field
The present invention relates to power supply and distribution fields, in particular to a kind of power grid fault detection system.
Background technology
Electric system is made of generator, transformer, busbar, electric line and electrical equipment.Each electrical equipment and it is
System is generally in normal operating condition, it is also possible to failure or abnormal operating condition.It is more next with the scale of electric system
Bigger, structure becomes increasingly complex, and failure generates inevitable.And in entire power production process, it occurs most frequently, is dangerous most tight
The failure of weight is short trouble.The reason of short trouble occurs has insulation of electrical installation material aging or mechanical damage, lightning stroke to draw
Overvoltage is played, natural calamity causes shaft tower to fall down to the ground or break, and birds and beasts bridging conducting wire causes short circuit, operations staff's maloperation etc., gives
The safe operation of electric system brings some new problems.The signal that electric power system fault feature refers to faults sign passes through
The failure mode of the reflection equipment and system of gained, position and the comprehensive of degree are measured after working process.The base of electric power system fault
Eigen has:1. electric current increases, that is, the electric current connected in the electrical equipment of short dot and power supply increases.2. voltage declines, i.e. event
Voltage on barrier point surrounding electrical equipment reduces, and the electrical distance away from fault point is closer, and voltage decline is more serious, or even drop
It is zero.3. circuit beginning voltage, the phase difference between electric current will change.4. the ratio between circuit beginning voltage and electric current, i.e.,
Measuring impedance will change.
Wherein transmission line of electricity is the element of power grid, since it has a very wide distribution, is often faced various complicated geographical
The influence of natural environment and climate environment just will have a direct impact on the safety of circuit when adverse environment condition leads to circuit operation failure
Reliability service even can cause large area blackout when serious.The failure of transmission line of electricity mainly has lightning stroke trip failure, external force
Destructive malfunction, bird pest failure, the stranded of transmission line icing and conducting wire, damage and flashover burn failure etc..
Busbar is the important equipment that electric energy collection neutralizes distribution, is one of important composition original paper of electric system.Busbar occurs
Failure will make all elements for being connected to busbar be forced to cut off, and large area user is caused to have a power failure, and electrical equipment is seriously damaged,
It even destroys power system stability operation, causes electric system to be disintegrated, consequence is extremely serious.
And in electric network fault, some failures belong to the failure of regularity, such as the shaking of cable, the corrosion of cable, allusion quotation
Type：The fixed swing of cable touches neighbouring branch, and gradually corrosion causes electric current rule to change to connector, insulation ag(e)ing
Lead to fixed Leakage Current etc..Present this field discloses the means of the research monitoring for the above failure there are no document.
Invention content
The present invention proposes a kind of power grid fault detection system, which is characterized in that the system comprises：It is distributed in the electricity
Multiple power grid measuring devices in net, each power grid measuring device includes current metering sensor and voltage measurement sensor
At least one of, the power grid measuring device is for measuring at least one of current measurement value and voltage measuring value with shape
At multiple measured values with each time of origin；At least one computing device is communicably coupled to the multiple electricity
It net measuring device and is configured as receiving the multiple measured value and their own from the multiple power grid measuring device
Time of origin；Wherein described at least one computing device is configured as according to measured value described at least one rule analysis to detect
Electric network fault, wherein the rule be configured as fault type is associated at least one of the measured value.
Further, wherein the rule includes at least one of the following：Multiple measurements of single power grid measuring device,
The measurement substantially executes in same time；It is taken multiple measurements by single power grid measuring device, the measurement is in difference
Time executes；And the multiple measurements carried out by multiple power grid measuring devices, the measurement substantially execute at the same time.
Further, wherein at least one of the multiple power grid measuring device includes additionally：At least one sensing
Device is configured as measuring cable temperature, wind speed, humidity, cable displacement, cable height and cable angle；And the wherein described rule
It then also comprises at least one of the current measurement value and the voltage measuring value and the cable temperature, wind speed, it is wet
Degree, cable displacement, cable height, cable angle store be supplied to the computing device in association.
Further, wherein the failure is at least one of the following：The cable of the power grid is contacted by object；Institute
It states and generates corrosion in cable or corrode in cable connector；The damage of the cable insulation and generate current leakage.
Further, wherein the rule further includes：Measure the difference between the measurement of at least two power grid measuring devices；
Detect the Time Dependent variation of the difference；And it is failure is associated with time correlation variation.
Further, wherein Time Dependent variation be dull either continuous cycle or the period repeat.
Further, wherein at least two power grid measuring device detects the time correlation variation respectively, and wherein
At least two power grids measuring device detects the time correlation variation of different value.
Further, if the variation of the wherein described time correlation is to repeat in the period, judge that the failure is power grid
In there is cable to be contacted with object；If the wherein described time correlation variation is dull, and the failure is cable insulation
Damage and generate current leakage；If the time correlation variation continuously recycles, judge that the failure is the electricity
Corrosion is generated in cable or is corroded in cable connector.
Further, the computing device is coupled to the multiple power grid measuring device by the communication system of power grids, and
And the computing device is located at the power grid a bit, substantially equidistant from from the multiple power grid measuring device of the described
It is uniformly distributed respectively along each branch of the power grid, each power grid measuring device can be also used for executing the measurement and incite somebody to action
Measurement result stores the power grid measuring device for passing to upstream.
Advantageous effects obtained by the present invention are：
It provides a kind of to the cable fixation means that periodic regularity failure is analyzed in other words.
Specific implementation mode
In order to enable the objectives, technical solutions, and advantages of the present invention are more clearly understood, below in conjunction with embodiment, to this
Invention is further elaborated；It should be appreciated that specific embodiment described herein is only used for explaining the present invention, and do not have to
It is of the invention in limiting.To those skilled in the art, after access is described in detail below, other systems of the present embodiment
System, method and/or feature will become obvious.All such additional systems, method, feature and advantage are intended to be included in
It in this specification, is included within the scope of the invention, and is protected by the appended claims.In description described in detail below
The other feature of the disclosed embodiments, and these characteristic roots will be apparent according to described in detail below.
Embodiment one.
The present embodiment proposes a kind of power grid fault detection system, which is characterized in that the system comprises：It is distributed in described
Multiple power grid measuring devices in power grid, each power grid measuring device include current metering sensor and voltage measurement sensing
At least one of device, the power grid measuring device be for measure at least one of current measurement value and voltage measuring value with
Form multiple measured values with each time of origin；At least one computing device is communicably coupled to the multiple
It power grid measuring device and is configured as receiving the multiple measured value and each from the multiple power grid measuring device
Time of origin；Wherein described at least one computing device is configured as according to measured value described at least one rule analysis to examine
Survey electric network fault, wherein the rule be configured as fault type is associated at least one of the measured value.Wherein
The rule includes at least one of the following：Multiple measurements of single power grid measuring device, the measurement is substantially identical
It is executed in time；It is taken multiple measurements by single power grid measuring device, described measure executes in different time；And by multiple electricity
Multiple measurements that net measuring device carries out, the measurement substantially execute at the same time.
Wherein, at least one of the multiple power grid measuring device includes additionally：At least one sensor, is configured
To measure cable temperature, wind speed, humidity, cable displacement, cable height and cable angle；And in addition the wherein described rule is wrapped
It includes at least one of the current measurement value and the voltage measuring value and the cable temperature, wind speed, humidity, cable position
It moves, cable height, cable angle stores be supplied to the computing device in association.Engineering staff can receive failure in this way
While report, the analysis of cable actual environment is carried out, to make specific report in more detail to the generation of failure.
The wherein described failure is at least one of the following：The cable of the power grid is contacted by object；In the cable
It generates corrosion or corrodes in cable connector；The damage of the cable insulation and generate current leakage.It is wherein described
Rule further includes：Measure the difference between the measurement of at least two power grid measuring devices；The Time Dependent for detecting the difference becomes
Change；And it is failure is associated with time correlation variation.
Wherein Time Dependent variation be dull either continuous cycle or the period repeat.
Further, wherein at least two power grid measuring device detects the time correlation variation respectively, and wherein
At least two power grids measuring device detects the time correlation variation of different value.If the variation of the wherein described time correlation
It is to repeat in the period, then judges that the failure is that have cable to be contacted with object in power grid；If the wherein described time correlation variation
It is dull, and the failure is the damage of cable insulation and generates current leakage；If the time correlation variation is
It continuously recycles, then judges that the failure is to generate corrosion in the cable or corrode in cable connector.The meter
It calculates device and is coupled to the multiple power grid measuring device by the communication system of power grids, and the computing device is located at the electricity
Net is a bit, substantially equidistant from equal along each branch of the power grid respectively from the multiple power grid measuring device of the described
Even distribution, each power grid measuring device can be also used for executing the measurement and measurement result storage passed to upstream
Power grid measuring device.
Embodiment two.
In the present embodiment, the system is constructed in the form of a kind of computer software comprising have processing
The hardware system of device, and include the instruction for making the processor execute operation when executed by least one processor, it is described
Operation includes：Define at least one fault type of power grid；Define at least one for detecting at least one fault type
A rule, the rule are associated with the measurement of at least one type by the fault type；Execute multiple measurements, the measurement
Executed by multiple power grid measuring devices for being distributed in the power grid, the power grid measuring device include current metering sensor and
At least one of voltage measurement sensor, the power grid measuring device are operable to measure at least one current measurement and electricity
Pressure is measured to form multiple measurements and its respective time of origin；And according to described at least one rule analysis measure with
Detect failure.Wherein described measure includes at least one of the following：Absolute value, the variation of value and the change rate of value, voltage, electricity
The transient change of stream and at least one of power, a moment, a spike and a fluctuation.The wherein described rule include with
It is at least one of lower：Multiple measurements of single power grid measuring device, the measurement substantially execute in same time；By list
A power grid measuring device takes multiple measurements, and described measure executes in different time；And it is carried out by multiple power grid measuring devices
Multiple measurements, the measurement substantially executes at the same time.
Wherein further include：Measurement cable temperature, wind speed, humidity, cable movement, cable height, cable force down and cable angle
At least one of degree；Wherein described according to being measured described at least one rule analysis to detect failure includes by the electricity
At least one of flow measurement and the voltage measurement and cable temperature, wind speed, humidity, cable movement, cable height it is described
At least one of measurement is associated, and cable forces down, cable angle and time.The failure is at least one of the following：Institute
The cable for stating power grid is contacted by object；Corrosion is generated in the cable；Corrode in fixture；The damage of the cable
Insulator；Generation and the relevant current leakage of the cable etc..
Embodiment three.
The present embodiment proposes a kind of power grid fault detection system, which is characterized in that the system comprises：It is distributed in described
Multiple power grid measuring devices in power grid, each power grid measuring device include current metering sensor and voltage measurement sensing
At least one of device, the power grid measuring device be for measure at least one of current measurement value and voltage measuring value with
Form multiple measured values with each time of origin；At least one computing device is communicably coupled to the multiple
It power grid measuring device and is configured as receiving the multiple measured value and each from the multiple power grid measuring device
Time of origin；Wherein described at least one computing device is configured as according to measured value described at least one rule analysis to examine
Survey electric network fault, wherein the rule be configured as fault type is associated at least one of the measured value.Wherein
The rule includes at least one of the following：Multiple measurements of single power grid measuring device, the measurement is substantially identical
It is executed in time；It is taken multiple measurements by single power grid measuring device, described measure executes in different time；And by multiple electricity
Multiple measurements that net measuring device carries out, the measurement substantially execute at the same time.
Wherein, at least one of the multiple power grid measuring device includes additionally：At least one sensor, is configured
To measure cable temperature, wind speed, humidity, cable displacement, cable height and cable angle；And in addition the wherein described rule is wrapped
It includes at least one of the current measurement value and the voltage measuring value and the cable temperature, wind speed, humidity, cable position
It moves, cable height, cable angle stores be supplied to the computing device in association.Engineering staff can receive failure in this way
While report, the analysis of cable actual environment is carried out, to make specific report in more detail to the generation of failure.
The wherein described failure is at least one of the following：The cable of the power grid is contacted by object；In the cable
It generates corrosion or corrodes in cable connector；The damage of the cable insulation and generate current leakage.It is wherein described
Rule further includes：Measure the difference between the measurement of at least two power grid measuring devices；The Time Dependent for detecting the difference becomes
Change；And it is failure is associated with time correlation variation.
Wherein Time Dependent variation be dull either continuous cycle or the period repeat.
Further, wherein at least two power grid measuring device detects the time correlation variation respectively, and wherein
At least two power grids measuring device detects the time correlation variation of different value.If the variation of the wherein described time correlation
It is to repeat in the period, then judges that the failure is that have cable to be contacted with object in power grid；If the wherein described time correlation variation
It is dull, and the failure is the damage of cable insulation and generates current leakage；If the time correlation variation is
It continuously recycles, then judges that the failure is to generate corrosion in the cable or corrode in cable connector.The meter
It calculates device and is coupled to the multiple power grid measuring device by the communication system of power grids, and the computing device is located at the electricity
Net is a bit, substantially equidistant from equal along each branch of the power grid respectively from the multiple power grid measuring device of the described
Even distribution, each power grid measuring device can be also used for executing the measurement and measurement result storage passed to upstream
Power grid measuring device.
In the present embodiment the wherein described request bag include time of measuring and the time of measuring with by each power grid
The time correlation connection at least one measurement that measuring device executes.The measurement result of the wherein described request with by second power grid
Period around the time at least one measurement that measuring device executes is associated.The predetermined period is not more than basis
The speed of electric signal in the cable of the power grid detects the transition and the proximal measurement device in the measuring device
Between the transition traveling time.It is wherein described that at least one of described measurement is conveyed to be surveyed including multiple low resolution
Amount；And the wherein described request bag includes the request to multiple high resolution measurements.The resolution ratio includes the multiple measurement
Time at least one of solution rate and repetitive rate again.
And it further includes the corresponding measurement for detecting the multiple transient states and the transient state that are detected by the first measuring device
Time；And at least one upper report transition in the following：Be placed on first measuring device downstream second is surveyed
The pre- timing around the time of measuring of the transition detected by first measuring device is not detected in amount device
Between transient state in section；And second measuring device in first measuring device downstream is placed on by first measuring device
The opposite transition of repetition is detected in predetermined amount of time around the time of measuring of the transition of detection.
Although describing the present invention by reference to various embodiments above, but it is to be understood that do not departing from the present invention's
In the case of range, many changes and modifications can be carried out.Therefore, be intended to foregoing detailed description be considered as it is illustrative and
It is unrestricted, and it is to be understood that following following claims (including all equivalents) is intended to limit the spirit and model of the present invention
It encloses.The above embodiment is interpreted as being merely to illustrate the present invention rather than limit the scope of the invention.It is reading
After the content of the record of the present invention, technical staff can make various changes or modifications the present invention, these equivalence changes and
Modification equally falls into the scope of the claims in the present invention.
Claims (9)
1. a kind of power grid fault detection system, which is characterized in that the system comprises：
The multiple power grid measuring devices being distributed in the power grid, each power grid measuring device includes current metering sensor
At least one of with voltage measurement sensor, the power grid measuring device is for measuring current measurement value and voltage measuring value
At least one of with formed with each time of origin multiple measured values；
At least one computing device is communicably coupled to the multiple power grid measuring device and is configured as from the multiple
Power grid measuring device receives the multiple measured value and their own time of origin；
Wherein described at least one computing device is configured as according to measured value described at least one rule analysis to detect power grid
Failure, wherein the rule be configured as fault type is associated at least one of the measured value.
2. system according to claim 1, which is characterized in that the wherein described rule includes at least one of the following：It is single
Multiple measurements of a power grid measuring device, the measurement substantially execute in same time；By single power grid measuring device into
Row repeatedly measures, and described measure executes in different time；And the multiple measurements carried out by multiple power grid measuring devices, the survey
Amount substantially executes at the same time.
3. system according to claim 2, which is characterized in that wherein, at least one in the multiple power grid measuring device
It is a to include additionally：At least one sensor, be configured as measure cable temperature, wind speed, humidity, cable displacement, cable height,
With cable angle；And the wherein described rule is also comprised at least one in the current measurement value and the voltage measuring value
A and cable temperature, wind speed, humidity, cable displacement, cable height, cable angle store be supplied to the meter in association
Calculate device.
4. system according to claim 3, which is characterized in that the wherein described failure is at least one of the following：It is described
The cable of power grid is contacted by object；Corrosion is generated in the cable or is corroded in cable connector；The cable is exhausted
The damage of edge body and generate current leakage.
5. system according to claim 4, which is characterized in that the wherein described rule further includes：Measure at least two power grids
Difference between the measurement of measuring device；Detect the Time Dependent variation of the difference；And failure and the time correlation are become
Change associated.
6. system according to claim 5, which is characterized in that the wherein described Time Dependent variation is dull or continuous
It is cycle or that the period repeats.
7. system according to claim 6, which is characterized in that wherein at least two power grid measuring device detects institute respectively
Time correlation variation is stated, and the wherein described at least two power grids measuring device detects the time correlation variation of different value.
8. system according to claim 7, which is characterized in that if the variation of the wherein described time correlation is to repeat in the period
, then judge that the failure is that have cable to be contacted with object in power grid；If the wherein described time correlation variation is dull, and
And the failure is the damage of cable insulation and generates current leakage；If the time correlation variation continuously recycles,
Then judge that the failure is to generate corrosion in the cable or corrode in cable connector.
9. system according to claim 8, which is characterized in that the computing device is coupled to by the communication system of power grids
The multiple power grid measuring device, and the computing device is located at the power grid a bit, it is the multiple from the described
Power grid measuring device is substantially equidistant from uniformly distributed along each branch of the power grid respectively, each power grid measuring device may be used also
The power grid measuring device of upstream is passed to for the execution measurement and by measurement result storage.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810544404.5A CN108717151A (en) | 2018-05-31 | 2018-05-31 | A kind of power grid fault detection system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810544404.5A CN108717151A (en) | 2018-05-31 | 2018-05-31 | A kind of power grid fault detection system |
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| CN108717151A true CN108717151A (en) | 2018-10-30 |
Family
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| CN201810544404.5A Withdrawn CN108717151A (en) | 2018-05-31 | 2018-05-31 | A kind of power grid fault detection system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110380413A (en) * | 2019-07-23 | 2019-10-25 | 广东电网有限责任公司 | PMU allocation method, system, equipment and computer media in a kind of power grid |
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| EP2533060A1 (en) * | 2011-06-07 | 2012-12-12 | Schneider Electric Industries SAS | Directional detection of resistive earth fault and medium-voltage conductor breakage |
| CN103033686A (en) * | 2011-09-29 | 2013-04-10 | 本德尔有限两合公司 | Method for insulation fault monitoring with dynamic response characteristic |
| CN106501669A (en) * | 2015-09-03 | 2017-03-15 | 本德尔有限两合公司 | For the method and apparatus that insulation fault location has the determination of adaptive testing electric current |
| WO2017216673A1 (en) * | 2016-06-13 | 2017-12-21 | Electrical Grid Monitoring Ltd. | A method and system for dynamic fault detection in an electric grid |
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2018
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| CN101023366A (en) * | 2004-06-04 | 2007-08-22 | Fmc技术有限公司 | A method of monitoring line faults in a medium voltage network |
| EP2533060A1 (en) * | 2011-06-07 | 2012-12-12 | Schneider Electric Industries SAS | Directional detection of resistive earth fault and medium-voltage conductor breakage |
| CN103033686A (en) * | 2011-09-29 | 2013-04-10 | 本德尔有限两合公司 | Method for insulation fault monitoring with dynamic response characteristic |
| CN106501669A (en) * | 2015-09-03 | 2017-03-15 | 本德尔有限两合公司 | For the method and apparatus that insulation fault location has the determination of adaptive testing electric current |
| WO2017216673A1 (en) * | 2016-06-13 | 2017-12-21 | Electrical Grid Monitoring Ltd. | A method and system for dynamic fault detection in an electric grid |
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| CN110380413A (en) * | 2019-07-23 | 2019-10-25 | 广东电网有限责任公司 | PMU allocation method, system, equipment and computer media in a kind of power grid |
| CN110380413B (en) * | 2019-07-23 | 2021-04-23 | 广东电网有限责任公司 | PMU (phasor measurement Unit) arranging method, system, equipment and computer medium in power grid |
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Application publication date: 20181030 |