CN102866289A - Power cable sheath grounding current fault analysis method - Google Patents
Power cable sheath grounding current fault analysis method Download PDFInfo
- Publication number
- CN102866289A CN102866289A CN2012103263298A CN201210326329A CN102866289A CN 102866289 A CN102866289 A CN 102866289A CN 2012103263298 A CN2012103263298 A CN 2012103263298A CN 201210326329 A CN201210326329 A CN 201210326329A CN 102866289 A CN102866289 A CN 102866289A
- Authority
- CN
- China
- Prior art keywords
- current
- analysis
- current value
- ground
- value
- 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.)
- Granted
Links
Images
Landscapes
- Emergency Protection Circuit Devices (AREA)
Abstract
The invention discloses a power cable sheath grounding current fault analysis method which comprises the steps of 1, setting parameter information in a monitoring platform; 2, loading number and name information of each monitoring terminal in the monitoring platform; 3, receiving a present current value and collection time collected by each monitoring terminal by the monitor platform through a network mode in real time; 4, when receiving the present current value every time, enabling the monitoring platform to respectively carry one-time jump analysis on a grounding current collected by each monitoring terminal; 5, each time receiving the present current value, enabling the monitoring platform to respectively carry out one-time zero drift analysis on the grounding current collected by each monitoring terminal; 6, regularly carrying out fluctuation analysis on a grounding current value collected by each monitoring terminal by the monitor platform; and 7, outputting an analysis result of each monitoring terminal from the monitoring platform.
Description
Technical field
The present invention relates to a kind of power cable sheath grounding current monitoring field, relate in particular to the failure analysis methods of sheath grounding current.
Background technology
Along with sustained economic growth, urban distribution network fast development, Modern Urban Living and production are increasing to the dependence of electric power, the failure-free operation that modern urban construction is carried electric power is had higher requirement, the urban aerial circuit send electricity to be replaced by underground high voltage cable, the quantity of underground high voltage cable just sharply rises, and therefore the operation monitoring of underground high-tension cable is become particularly important.Traditional on-line monitoring mode generally adopts the mode of cable grounding current monitoring that the operation conditions of underground electric power tunnel cable is carried out on-line monitoring, this mode needs experienced operator on duty regularly the ground current history curve to be analyzed summary, on the one hand, the operator on duty does not possess real-time to the analysis of ground current history curve, after often can only waiting cable fault to occur, the Changing Pattern of analyzing failure cause and fault generating process ground current; On the other hand, need experienced operator on duty to participate in the ground current analysis, caused the waste of human resources.Therefore, cable fault analysis expert system is set up in the electric system an urgent demand, and cable fault is carried out the classification model construction analysis, improves the early warning before cable fault occurs, and reduces the failure rate in the cable operational process.
Summary of the invention
Purpose of the present invention is exactly in order to address the above problem, and a kind of power cable sheath grounding current analytical approach is provided.The method is made assessment by the on-line analysis to power cable sheath grounding current to the running status of cable body, and ground current is analyzed drawn cable running status in time notify to the operator on duty.The method is on the basis of original ground current on-line monitoring, sudden change and slow variation the to ground current carry out analysis and filter, before the power cable operation unusual fluctuations occur or breaks down, can in time automatically make early warning, further improved the safe operation grade of power cable.
The present invention provides a kind of failure analysis methods of power cable sheath grounding current in order to reach above purpose, may further comprise the steps:
Current current value and acquisition time that step 3 monitor supervision platform is gathered by each monitor terminal by the real-time reception of the mode of network; This current value is used for the on-line analysis of step (4), step (5), step (6);
The every reception of step 4 is current current value once, monitor supervision platform carries out a saltus step analysis with regard to the ground current to each monitor terminal collection respectively, and the current value of described saltus step analysis and utilization collection and positive change rate threshold values, inverse change rate threshold values compare analysis;
The every reception of step 5 is current current value once, monitor supervision platform carries out a drift analysis with regard to the ground current to each monitor terminal collection respectively, and current threshold is analyzed in the current value of described drift analysis and utilization collection and drift, drift analysis times threshold values is analyzed;
Described step 4 ground current saltus step analytical procedure is as follows:
(1) judge whether it is the current value first time, if, analyze and finish, if not, forwarded for (2) step to;
(2) judge last time, whether current value was zero; If, analyze and finish, if not, forwarded for (3) step to;
(3) judge the saltus step type, if positive transition forwards step (4) to and carries out the positive transition analysis; If oppositely saltus step forwards step (5) to and carries out reverse saltus step analysis;
(4) rate of change of calculating current value judges whether rate of change surpasses positive change rate threshold values, if, send the positive transition fault warning, analyze and finish; If not, analyze end;
(5) rate of change of calculating current value judges whether rate of change surpasses inverse change rate threshold values, if, send reverse jump failure alarm, analyze and finish; If not, analyze end;
The determination methods of the described saltus step type of step (3) is: the current current value of ground current is positive transition greater than the last current value that gathers of ground current; The current current value of ground current, being less than or equal to the last current value that gathers of ground current is reverse saltus step;
The computing formula of the rate of change of step (4) or the described current value of step (5) is:
R=（|I1–I0|）/I0 （1）
In the formula, R: the rate of change of current value; I0: the last current value that gathers of ground current acquisition terminal; I1: the current value of this collection of ground current acquisition terminal;
The step that described step 5 ground current drift is analyzed is as follows:
(1) judges that whether current value analyzes current threshold less than drift, if counter adds 1, forwards step (2) to; If not, the counter zero clearing is analyzed and is finished;
(2) whether judge counter greater than drift analysis times threshold values, if, send the alarm of drift analysis of failure, analyze and finish; If not, analyze end;
The concrete step of described step 6 ground current fluction analysis is as follows:
(1) the fluction analysis timer of startup monitor supervision platform judges whether timer arrives timing, if forward step (2) to; If not, analyze end;
(2) judge whether current period current value number surpasses minimum effectively number, if, forward step (3) to, if not, analyze and finish;
(3) judge whether a upper periodic current value number surpasses minimum effectively number, if forward step (4) to; If not, analyze end;
(4) current period carries out integral operation to current value and time, and result of calculation is f(a), f(a) be the integrated value of current period;
(5) a upper cycle is carried out integral operation to current value and time, and result of calculation is f(b), f(b) be the integrated value in a upper cycle;
(6) result of calculation value a; The technology formula of described a is as shown in Equation (2):
a=(|f(a)–f(b)|)/f(b) （2）
(7) whether judged result value a is greater than the fluctuation threshold values of setting, if start the fluction analysis fault warning, the analysis end; If not, analyze end.
The described computing formula that current value and time are carried out integral operation of step (4) or step (5) is shown in (3):
f(I)=∫(I1–I0)/2*dt （3）
In the formula: f (I) is the integral operation result; I0: the last current value that gathers of ground current acquisition terminal; I1: the current value of this collection of ground current acquisition terminal; , dt is this mistiming that gathers current value and gathered current value last time of ground current acquisition terminal.
Described step 7 analysis result output refers to by behind saltus step analysis, drift analysis, the fluction analysis, if monitor ground current value ANOMALOUS VARIATIONS, can at once the fault analysis result be sent to the operator on duty.
A kind of failure analysis methods of power cable sheath grounding current is to realize in the framework that is comprised of monitor supervision platform, monitoring host computer, monitor terminal.Monitor terminal arrives monitoring host computer with the data upload that gathers, monitoring host computer is crossed network communication mode with the data communication device of receiving and is transferred to monitor supervision platform, the server that is provided with in the monitor supervision platform carries out analyzing and processing to the monitor data that gathers in real time, analysis result is presented on the monitor supervision platform, so that for managerial personnel provide effective Monitoring Data, analyzing failure cause or early warning in early stage.
Described monitor terminal is a kind of hardware device that adopts high integration and ultralow Consumption, and this equipment is installed in the electric power tunnel, various environmental datas in the electric power tunnel are gathered, then with data upload to monitoring host computer;
Described monitoring host computer is the equipment that connects monitor supervision platform and monitor terminal, and the device data that its acquisition monitoring terminal collects is sent to monitor supervision platform after the data encapsulation.Monitoring host computer is transferred to monitor supervision platform with the data received in the mode of TCP/IP Ethernet interface.
Described monitor supervision platform possesses the function that data receiver, data processing, alarm generation, real time monitoring, history are checked.Monitor supervision platform is supported the access of multiple common equipment, can control and the data response the equipment of monitoring fast, and have open framework, is convenient to the access of expanded function and third-party platform.This platform can carry out according to user's demand the increase and decrease of module, satisfies the demand of user's different levels.
Described positive transition, finger vagabond current currency is greater than the last current value that gathers of ground current; Oppositely saltus step, finger vagabond current currency is less than or equal to the last current value that gathers of ground current.
Described positive transition analysis, when ground current generation positive transition, during threshold value that rate of change surpass to be set, analysis module is thought the saltus step of forward ground current is occured.
Described reverse saltus step analysis, when reverse saltus step occured ground current, rate of change was greater than zero, and during less than the threshold value set, and analysis module is thought reverse ground current saltus step is occured.
Described step 5 ground current drift is analyzed, and on the one hand, induction current may occur on the cable sheath ground wire; On the other hand, may there be Acquisition Error in cable sheath ground current acquisition terminal.Therefore, when the cable sheath ground current is actual when being 0A, the current value that cable sheath ground current acquisition terminal collects may be OA, also may be a value of being a bit larger tham OA.So, when sheath grounding current during continuously for several times less than a certain ground current threshold value, can think that this cable sheath ground connection breaks down i.e. drift analysis.
Described step 6 ground current fluction analysis refers to that the cable sheath ground current can carry out cyclical variation along with the cyclical variation of city peak of power consumption and low power consumption every day.Therefore, if take current ground current acquisition time as the concluding time, integral operation is carried out at ground current and acquisition time interval in 24 hours, this integral operation result then, with the integral operation result's of the previous day difference, should be less than a certain threshold value.If the integral result difference is more than or equal to a certain threshold value, then larger fluctuation has occured in this cable sheath ground current, and namely the ground current fluction analysis is unusual.
Beneficial effect of the present invention:
The power cable sheath grounding current failure analysis methods can be found hidden danger and fault in the cable operational process by the on-line analysis to the electric power tunnel ground current within the very first time.This analytical approach by before cable fault is occured and the ground current Changing Pattern of fault when occuring carry out summarizes, can open circuit to imperfect earth, partial short-circuit, part, thunderbolt, the slow variation of electric current, load continue to rise, the situation of load continuous decrease in time provides early warning; Can in time provide alarm to the situation of tripping operation, short circuit.The enforcement of this analytical approach, both improve the real-time that cable hidden danger and cable fault are disposed, avoided again the waste of manpower and materials, improved to a great extent the safe operation of cable, effectively prevent the further expansion of hidden danger and fault, reduced to greatest extent loss.Native system is real-time, and is compatible good, simple to operate, realized that the intelligent analysis of cable running status is processed, for the safe operation of power cable provides guarantee.
Description of drawings
Fig. 1 is power cable sheath grounding current failure analysis methods system architecture synoptic diagram
Fig. 2 cable sheath ground current analytic process synoptic diagram;
Fig. 3 is that synoptic diagram is analyzed in the saltus step of cable sheath ground current;
Fig. 4 is that synoptic diagram is analyzed in the drift of cable sheath ground current;
Fig. 5 is cable sheath ground current fluction analysis synoptic diagram.
Among the figure, 1. setup parameter information 2. loads monitor terminal information, 3. receives the ground current currency, 4. the ground current saltus step is analyzed, and 5. the ground current drift is analyzed, 6. ground current fluction analysis, 7. ground current analysis result output, 8. monitor supervision platform, 9. monitoring host computer, 10. monitor terminal.
The invention will be further described below in conjunction with accompanying drawing and embodiment.
Such as Fig. 1, power cable sheath grounding current failure analysis methods system architecture synoptic diagram, it comprises monitor supervision platform 8, and the monitoring host computer 9 and the monitor terminal 10 that are connected successively with monitor supervision platform 8.
Monitoring host computer 9 is installed in the transformer station, as the medium between monitor supervision platform 8 and the monitor terminal 10, realizes the conversion of monitor supervision platform 8 network services and the communication protocol of monitor terminal 10, and realization is to the remote power feeding of monitor terminal 10, and communication such as patrols and examines at a series of functions.
Adopt bus to be connected between monitor terminal 10 and the monitoring host computer 9, by monitoring host computer 9 remote power feedings, communication employing polling mode.
Such as Fig. 2, cable sheath ground current analytic process, at first, ground current analysis module setup parameter information 1 and loading monitor terminal information 2; Then, analysis module receives the currency 3 of ground current in real time, and every reception primary current currency triggers ground current saltus step analysis 4 and ground current drift and analyzes 5.Analysis module regularly carries out fluction analysis to ground current; At last, the fault output after analysis module will be analyzed notifies the operator on duty to dispose.
The ground current saltus step analyzes 4, can effectively judge the sudden change of ground current; The ground current drift analyzes 5 can make effective judgement to tripping operation, disconnection fault; Ground current fluction analysis 6 can to the slow variation of ground current, the situation that load continues rising or load continuous decrease, be made analyzing preferably and judge.Ground current saltus step analysis 4 and ground current fluction analysis 6 can be accomplished the timely early warning that cable fault is front; The ground current drift analyze 5 can realize behind the cable fault and alarm.Three kinds of analytical approachs organically combine the safe operation that can greatly improve cable.
Such as Fig. 3, the saltus step of cable sheath ground current analyzes 4, and the ground current that receives the collection of cable sheath ground connection acquisition terminal triggers this analysis process.
Positive change rate threshold value and inverse change rate threshold value are manually set by the operator on duty.
When carrying out positive transition analysis and reverse saltus step analysis, calculate the rate of change of curent change according to following formula.Wherein, R: ground current rate of change; I0: the last current value that gathers of ground current acquisition terminal; I1: the current value of this collection of ground current acquisition terminal:
R=（+|I1–I0|）/I0 （1）
If receive the current value of acquisition terminal for the first time, owing to there is not the last current value that gathers, therefore, can't finish the comparison of current value, analyze and finish.
According to ground current rate of change computing formula, last current value I 0 is as divisor, if last current value is zero, then this computing formula can't be finished, and therefore, analyzes and finishes.
The saltus step type is judged, judges that namely this saltus step is positive transition or oppositely saltus step.If positive transition is then calculated rate of change, and judge whether rate of change surpasses positive change rate threshold value, and rate of change surpasses positive change rate threshold value, then sends the positive transition fault warning, notifies the operator on duty, analyzes and finishes; If rate of change is then calculated in oppositely saltus step, and judge whether rate of change surpasses inverse change rate threshold value, and rate of change surpasses inverse change rate threshold value, then sends reverse jump failure alarm, notifies the operator on duty, analyzes and finishes.
The ground current saltus step analyzes 4, can effectively judge the sudden change of ground current.The ground current sudden change, normally open circuit, be struck by lightning and cause by imperfect earth, partial short-circuit, part, analyze 4 by the ground current saltus step, can effectively find the hidden danger in the cable operational process, and in time adopt an effective measure, avoid the further diffusion of hidden danger and accident.
Such as Fig. 4, the drift of cable sheath ground current analyzes 5, and the ground current that receives the collection of cable sheath ground connection acquisition terminal triggers this analysis process.
5 current thresholds are analyzed in drift and 5 frequency threshold value are analyzed in drift, manually set by the operator on duty.5 frequency threshold value are analyzed in drift, are mainly used to filter the situation that acquisition terminal does not collect current value (when not collecting current value, reporting 0A) once in a while, reduce the wrong report of analysis module.
Counter is used for the situation that current value is analyzed 5 current thresholds less than drift is carried out accumulated counts.
If current value is analyzed 5 current thresholds more than or equal to drift, then counter O reset is analyzed and is finished.
Current value is analyzed 5 current thresholds less than drift, and then counter adds one.Analyze 5 frequency threshold value if the value of this counter is less than or equal to drift, then analyze and finish; If the value of this counter is analyzed 5 frequency threshold value greater than drift, think that then drift occurs analyzes 5 fault warnings, analysis module sends drift and analyzes 5 fault warning information, notifies the operator on duty.
Can make timely and effectively judgement because tripping operation or broken string that thunderbolt, short circuit cause, ground current drift analyze 5, and in time fault warning be notified to the operator on duty.Analyze 5 by the ground current drift and can greatly shorten the time of finding the cable operation troubles and solving the cable operation troubles, reduced the loss that outage brings.
Such as Fig. 5, cable sheath ground current fluction analysis 6 carries out the clocked flip analysis by fluction analysis 6 timers.Adopt timing mode carry out fluction analysis 6 main because: on the one hand, 6 pairs of current values of one day of fluction analysis carry out integral operation, and calculated amount is larger, and are if adopt received current value trigger mode of operation, higher to the performance requirement of computing machine; On the other hand, ground current fluction analysis 6 is mainly used to the slow variation of analysis waveform, and the unusual saltus step of a ground current can not cause the fluction analysis alarm, therefore, adopts the timer timing analysis more reasonable.
Cable sheath ground current integral operation formula is as follows, and f (I) is the integral operation result; I0: the last current value that gathers of ground current acquisition terminal; I1: the current value of this collection of ground current acquisition terminal; Dt is this mistiming that gathers current value and gathered current value last time of ground current acquisition terminal:
f(I)=∫(I1–I0)/2*dt （3）
Timer arrives timing, the beginning fluction analysis, and fluction analysis was carried out at common every interval in 1 hour one time.
Current period and upper one-period if the current value number is less than or equal to fluction analysis 6 minimum effectively numbers, is analyzed and are finished.By above judgement, can reduce because current period and a upper cyclic curve different wave shape that current value causes very little are larger, cause and analyze wrong report.
According to above-mentioned integral operation formula, calculated respectively integrated value f (a) and the integrated value f in a upper cycle (b) of current period, and according to following formula result of calculation value a:
a=(|f(a)–f(b)|)/f(b) （2）
If end value a greater than fluction analysis 6 threshold values, then sends fluction analysis 6 fault warnings, notify the operator on duty.
Although above-mentionedly by reference to the accompanying drawings the specific embodiment of the present invention is described; but be not limiting the scope of the invention; on the basis of technical scheme of the present invention, those skilled in the art do not need to pay various modifications that creative work can make still in protection scope of the present invention.
Claims (8)
1. the failure analysis methods of power cable sheath grounding current may further comprise the steps, and it is characterized in that:
Step 1 is setup parameter information in monitor supervision platform, comprises minimum effectively number and the fluctuation threshold values of positive change rate threshold values, inverse change rate threshold values, drift analysis current threshold, drift analysis times threshold values, counter initial value, timing, current value;
Step 2 loads numbering, the name information of each monitor terminal in monitor supervision platform;
Current current value and acquisition time that step 3 monitor supervision platform is gathered by each monitor terminal by the real-time reception of the mode of network; This current value is used for the on-line analysis of step (4), step (5), step (6);
The every reception of step 4 is current current value once, monitor supervision platform carries out a saltus step analysis with regard to the ground current to each monitor terminal collection respectively, and the current value of described saltus step analysis and utilization collection and positive change rate threshold values, inverse change rate threshold values compare analysis;
The every reception of step 5 is current current value once, monitor supervision platform carries out a drift analysis with regard to the ground current to each monitor terminal collection respectively, and current threshold is analyzed in the current value of described drift analysis and utilization collection and drift, drift analysis times threshold values is analyzed;
Step 6 monitor supervision platform regularly carries out fluction analysis to the ground current value of each monitor terminal collection, utilizes the ground current value after calculating to compare analysis with the fluctuation threshold values;
Step 7 is exported the analysis result of each monitor terminal in monitor supervision platform.
2. the failure analysis methods of power cable sheath grounding current as claimed in claim 1, it is characterized in that: described step 4 ground current saltus step analytical procedure is as follows:
(1) judges whether it is the current value first time, if analyze and finish; If not, forwarded for (2) step to;
(2) judge last time, whether current value was zero, if analyze and finish; If not, forwarded for (3) step to;
(3) judge the saltus step type, if positive transition forwards step (4) to and carries out the positive transition analysis; If oppositely saltus step forwards step (5) to and carries out reverse saltus step analysis;
(4) rate of change of calculating current value judges whether rate of change surpasses positive change rate threshold values, if, send the positive transition fault warning, analyze and finish; If not, analyze end;
(5) rate of change of calculating current value judges whether rate of change surpasses inverse change rate threshold values, if, send reverse jump failure alarm, analyze and finish; If not, analyze end.
3. the failure analysis methods of power cable sheath grounding current as claimed in claim 1 is characterized in that: the step that described step 5 ground current drift is analyzed is as follows:
(1) judges that whether current current value analyzes current threshold less than drift, if counter adds 1, forwards step (2) to; If not, the counter zero clearing is analyzed and is finished;
(2) whether judge counter greater than drift analysis times threshold values, if, send the alarm of drift analysis of failure, analyze and finish; If not, analyze end.
4. the failure analysis methods of power cable sheath grounding current as claimed in claim 1 is characterized in that: the concrete step of described step 6 ground current fluction analysis is as follows:
(1) the fluction analysis timer of startup monitor supervision platform judges whether timer arrives timing, if forward step (2) to; If not, analyze end;
(2) judge whether current period current value number surpasses minimum effectively number, if forward step (3) to; If not, analyze end;
(3) judge whether a upper periodic current value number surpasses minimum effectively number, if forward step (4) to; If not, analyze end;
(4) current period carries out integral operation to current value and time, and result of calculation is f(a), f(a) be the integrated value of current period;
(5) a upper cycle is carried out integral operation to current value and time, and result of calculation is f(b), f(b) be the integrated value in a upper cycle;
(6) result of calculation value a; Described a is as shown in Equation (2):
a=(|f(a)–f(b)|)/f(b) （2）
(7) whether judged result value a is greater than the fluctuation threshold values of setting, if start the fluction analysis fault warning, the analysis end; If not, analyze end.
5. the failure analysis methods of power cable sheath grounding current as claimed in claim 1, it is characterized in that: described step 7 analysis result output, finger by saltus step analysis, drift analysis, fluction analysis after, if monitor ground current value ANOMALOUS VARIATIONS, can at once the fault analysis result be sent to the operator on duty.
6. the failure analysis methods of power cable sheath grounding current as claimed in claim 2, it is characterized in that: the determination methods of the described saltus step type of step (3) is: the current current value of ground current is positive transition greater than the last current value that gathers of ground current; The current current value of ground current, being less than or equal to the last current value that gathers of ground current is reverse saltus step.
7. the failure analysis methods of power cable sheath grounding current as claimed in claim 2, it is characterized in that: the computing formula of the rate of change of step (4) or the described current value of step (5) is:
R=（|I1-I0|）/I0 （1）
In the formula, R: the rate of change of current value; I0: the last current value that gathers of ground current acquisition terminal; I1: the current value of this collection of ground current acquisition terminal.
8. the failure analysis methods of power cable sheath grounding current as claimed in claim 4 is characterized in that: the described computing formula that current value and time are carried out integral operation of step (4) or step (5) is shown in (3):
f(I)=∫(I1–I0)/2*dt （3）
In the formula: f (I) is the integral operation result; I0 is the last current value that gathers of ground current acquisition terminal; I1 is the current value of this collection of ground current acquisition terminal; Dt is this mistiming that gathers current value and gathered current value last time of ground current acquisition terminal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210326329.8A CN102866289B (en) | 2012-09-05 | 2012-09-05 | Power cable sheath grounding current fault analysis method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210326329.8A CN102866289B (en) | 2012-09-05 | 2012-09-05 | Power cable sheath grounding current fault analysis method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102866289A true CN102866289A (en) | 2013-01-09 |
| CN102866289B CN102866289B (en) | 2014-10-29 |
Family
ID=47445278
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201210326329.8A Active CN102866289B (en) | 2012-09-05 | 2012-09-05 | Power cable sheath grounding current fault analysis method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102866289B (en) |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103389437A (en) * | 2013-07-31 | 2013-11-13 | 国家电网公司 | Device and method for monitoring shielding current of secondary control cable of transformer substation in real time |
| CN103926449A (en) * | 2014-04-24 | 2014-07-16 | 江苏省电力公司常州供电公司 | Self-adaptive monitoring method for power cable grounding current |
| CN104965118A (en) * | 2015-01-14 | 2015-10-07 | 四川安普光控科技有限公司 | Antitheft type multifunctional wireless high-voltage cable sheath grounding current monitoring system |
| CN106645870A (en) * | 2016-11-30 | 2017-05-10 | 山东康威通信技术股份有限公司 | Tunnel cable grounding current safety alarm expert analysis method |
| CN113311284A (en) * | 2020-02-26 | 2021-08-27 | 南京南瑞继保电气有限公司 | High-voltage cable sheath circulating current fault discrimination method based on fault characteristic curve |
| CN113705854A (en) * | 2021-07-13 | 2021-11-26 | 上海烟草集团有限责任公司 | Fan current abnormity monitoring and early warning method |
| CN114938287A (en) * | 2022-04-02 | 2022-08-23 | 湖南大学 | Method and device for detecting abnormal behavior of power network with service features fused |
| CN115656719A (en) * | 2022-10-26 | 2023-01-31 | 徐忠林 | High-voltage cable sheath defect online diagnosis method based on sheath current abnormal motion |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1479107A (en) * | 2003-05-22 | 2004-03-03 | 华立集团有限公司 | Failure analysis monitoring method and system device used on power supply network |
| EP1505398A1 (en) * | 2003-08-08 | 2005-02-09 | Omron Corporation | Direct current detection circuit |
| JP2006148990A (en) * | 2004-11-16 | 2006-06-08 | Fuji Electric Fa Components & Systems Co Ltd | Leakage detecting circuit |
| CN201156070Y (en) * | 2007-11-30 | 2008-11-26 | 北京市电力公司 | Cable fault indicator |
| CN201583622U (en) * | 2010-01-11 | 2010-09-15 | 山东康威通信技术股份有限公司 | Grounding current state monitoring and analysis system of power cable protecting layer |
| US20110068801A1 (en) * | 2007-10-01 | 2011-03-24 | EchoStar Technologies, L.L.C. | Apparatus, system and methods for ground current detection |
| CN202305730U (en) * | 2011-10-12 | 2012-07-04 | 珠海安凯特电力科技有限公司 | Passive distribution network fault on-line monitoring device |
-
2012
- 2012-09-05 CN CN201210326329.8A patent/CN102866289B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1479107A (en) * | 2003-05-22 | 2004-03-03 | 华立集团有限公司 | Failure analysis monitoring method and system device used on power supply network |
| EP1505398A1 (en) * | 2003-08-08 | 2005-02-09 | Omron Corporation | Direct current detection circuit |
| JP2006148990A (en) * | 2004-11-16 | 2006-06-08 | Fuji Electric Fa Components & Systems Co Ltd | Leakage detecting circuit |
| US20110068801A1 (en) * | 2007-10-01 | 2011-03-24 | EchoStar Technologies, L.L.C. | Apparatus, system and methods for ground current detection |
| CN201156070Y (en) * | 2007-11-30 | 2008-11-26 | 北京市电力公司 | Cable fault indicator |
| CN201583622U (en) * | 2010-01-11 | 2010-09-15 | 山东康威通信技术股份有限公司 | Grounding current state monitoring and analysis system of power cable protecting layer |
| CN202305730U (en) * | 2011-10-12 | 2012-07-04 | 珠海安凯特电力科技有限公司 | Passive distribution network fault on-line monitoring device |
Non-Patent Citations (7)
| Title |
|---|
| 戴金源: "高压电力电缆绝缘在线监测", 《2009年全国输变电设备状态检修技术交流研讨会论文集》 * |
| 朱宇川等: "基于接地线电流法的电力电缆绝缘监测***设计", 《信息通信》 * |
| 段建东等: "用接地线电流法进行电力电缆绝缘在线监测的仿真计算", 《高压电器》 * |
| 章卫等: "直埋高压电缆故障点查找分析初探", 《河北电力技术》 * |
| 罗华煜等: "基于接地线电流法的电力电缆绝缘在线监测", 《高电压技术》 * |
| 郭大江等: "基于接地线电流法的多线路电缆绝缘在线监测***设计", 《仪表技术》 * |
| 魏书宁等: "电力电缆故障检测的方法与分析", 《计算技术与自动化》 * |
Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103389437A (en) * | 2013-07-31 | 2013-11-13 | 国家电网公司 | Device and method for monitoring shielding current of secondary control cable of transformer substation in real time |
| CN103926449A (en) * | 2014-04-24 | 2014-07-16 | 江苏省电力公司常州供电公司 | Self-adaptive monitoring method for power cable grounding current |
| CN103926449B (en) * | 2014-04-24 | 2016-11-02 | 江苏省电力公司常州供电公司 | The self-adaptive monitoring method of power cable earth current |
| CN104965118A (en) * | 2015-01-14 | 2015-10-07 | 四川安普光控科技有限公司 | Antitheft type multifunctional wireless high-voltage cable sheath grounding current monitoring system |
| CN106645870A (en) * | 2016-11-30 | 2017-05-10 | 山东康威通信技术股份有限公司 | Tunnel cable grounding current safety alarm expert analysis method |
| CN106645870B (en) * | 2016-11-30 | 2019-05-17 | 山东康威通信技术股份有限公司 | The earth current safe early warning specialist analytical method of cable in a kind of tunnel |
| CN113311284A (en) * | 2020-02-26 | 2021-08-27 | 南京南瑞继保电气有限公司 | High-voltage cable sheath circulating current fault discrimination method based on fault characteristic curve |
| CN113705854A (en) * | 2021-07-13 | 2021-11-26 | 上海烟草集团有限责任公司 | Fan current abnormity monitoring and early warning method |
| CN114938287A (en) * | 2022-04-02 | 2022-08-23 | 湖南大学 | Method and device for detecting abnormal behavior of power network with service features fused |
| CN114938287B (en) * | 2022-04-02 | 2023-09-05 | 湖南大学 | Power network abnormal behavior detection method and device integrating service characteristics |
| CN115656719A (en) * | 2022-10-26 | 2023-01-31 | 徐忠林 | High-voltage cable sheath defect online diagnosis method based on sheath current abnormal motion |
| CN115656719B (en) * | 2022-10-26 | 2023-04-07 | 徐忠林 | High-voltage cable sheath defect online diagnosis method based on sheath current transaction |
Also Published As
| Publication number | Publication date |
|---|---|
| CN102866289B (en) | 2014-10-29 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102866289B (en) | Power cable sheath grounding current fault analysis method | |
| CN102255330A (en) | Device and method for detecting island of micro power grid system | |
| CN101738565B (en) | Adaptive fault indicator | |
| CN109782060B (en) | Lean line loss analysis system | |
| CN103117602A (en) | Method for automatically reporting composite accidents in relay protection intelligence online running management system | |
| CN105116296A (en) | Special fault indicator for high-voltage power transmission network cable line | |
| CN110441655B (en) | Lightning grounding fault monitoring system for wind power plant current collecting line | |
| CN103064027A (en) | On-line monitoring and maintaining system for 750-volt wireless intelligent storage battery | |
| CN109687590B (en) | Grading outage and restoration reporting method and system | |
| CN101826754B (en) | On-line detection and operation maintenance system of transformer station | |
| CN204269739U (en) | Based on thunderbolt diagnosis and the real time warning device of leakage conductor | |
| CN103592580A (en) | Insulator haze and pollution flashover online monitoring system and method | |
| CN104201782A (en) | Transformer substation troubleshooting system | |
| CN111929634B (en) | N-line-based signal injection topology recognition device and method | |
| CN201876517U (en) | Atmosphere over-voltage intrusion wave monitoring system | |
| CN111313561A (en) | Backup power supply control system and control method thereof | |
| CN103235217B (en) | Dual protection act consistance monitoring device and monitoring method | |
| CN102707193A (en) | Ultra-low-power implementing method for fault indicator | |
| CN201742159U (en) | Online detection and operation and maintenance system for transformer station | |
| CN203324364U (en) | Leakage-current early warning system for low-voltage distribution network | |
| CN202305704U (en) | Running state monitoring device of zinc oxide arrester | |
| CN204425271U (en) | There is the photovoltaic supervising device of arc-detection function | |
| CN103795052A (en) | Data signal line RS-485 intelligent anti-lighting device and method | |
| CN205027858U (en) | Special fault indicator of high -tension transmission net cable run | |
| CN104901344A (en) | Power supply management method and system |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CP03 | Change of name, title or address |
Address after: 250101 A203, block F, entrepreneurship square, Qilu Software Park, No.1 Shunhua Road, high tech Development Zone, Jinan City, Shandong Province Patentee after: Conway Communication Technology Co., Ltd Address before: 250101 Qilu Software Park, No. 1 Shunhua Road, Jinan High-tech Development Zone, Shandong Province, A 203 Patentee before: SHANDONG KANGWEI COMMUNICATION TECHNOLOGY Co.,Ltd. |
|
| CP03 | Change of name, title or address |