CN106645870B - The earth current safe early warning specialist analytical method of cable in a kind of tunnel - Google Patents
The earth current safe early warning specialist analytical method of cable in a kind of tunnel Download PDFInfo
- Publication number
- CN106645870B CN106645870B CN201611082788.0A CN201611082788A CN106645870B CN 106645870 B CN106645870 B CN 106645870B CN 201611082788 A CN201611082788 A CN 201611082788A CN 106645870 B CN106645870 B CN 106645870B
- Authority
- CN
- China
- Prior art keywords
- current
- abnormal
- value
- threshold value
- earth
- 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.)
- Active
Links
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R19/00—Arrangements for measuring currents or voltages or for indicating presence or sign thereof
- G01R19/0046—Arrangements for measuring currents or voltages or for indicating presence or sign thereof characterised by a specific application or detail not covered by any other subgroup of G01R19/00
Landscapes
- 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 earth current safe early warning specialist analytical methods of cable in tunnel, comprising: alarm threshold value and filter condition are set in monitor supervision platform；Number, the name information of each monitor terminal are loaded in monitor supervision platform；Earth current is anomaly divided into three classes: jump is abnormal, absolute value is abnormal and alternate comparison is abnormal；Successively judge the earth current of each monitor terminal acquisition with the presence or absence of above-mentioned exception；Current anomaly analysis result is filtered, when filter condition is all satisfied, generates alarm；Filtered earth current anomaly analysis result is exported in monitor supervision platform.The invention has the advantages that: may be implemented effectively to detect abnormal current situation to the early warning analysis of tunnel grounding electric current.The threshold value of the filter condition of abnormal current is concurrently set, can be alarmed the abnormal current after filter condition is met, be prevented from reporting by mistake, improve accuracy.
Description
Technical field
The present invention relates to the abnormal discriminatory analysis method that whether there is of earth current, cable in especially a kind of tunnel
Earth current safe early warning specialist analytical method.
Background technique
The high-tension cable laid in electric power tunnel is the lifeblood in city.Once undesirable's illegal invasion and to earth cable
Implement destruction or larceny, will lead to temperature of cable junction raising, and then may cause cable connector explosion, gives state's family property
Production brings heavy losses, or even threatens construction or the life of maintenance personnel.
Therefore, electric power enterprise is highly desirable when earth cable is destroyed, theft or when anomalous variation (mutation), monitoring system
System can issue alarm signal to operator on duty in time by the on line real time to earth current and connector temperature, remind
Operator on duty and maintenance personnel start relevant treatment prediction scheme, avoid life and property loss.
When in the prior art for earth current accident analysis, peak period and low-valley interval are used to normal electric current
Situation considers deficiency, is easy to produce wrong report；And anomaly analysis is not comprehensive not to be judged to the abnormal conditions of three-phase current.
Whether existing earth current failure analysis methods reach threshold value simply by record fault current frequency of abnormity
It prevents from reporting by mistake, Rule of judgment is simple, and misinformation probability is high.
Summary of the invention
To solve the above-mentioned problems, the present invention provides a kind of earth current safe early warning analysis expert side of cable in tunnel
Method can effectively detect abnormal current situation, carry out analysis and early warning simultaneously for the current anomaly of lasting generation；And it can
Reject current noise and accidental current fluctuation influences caused by analysis result, reduces the generation of early warning result wrong report.
To achieve the goals above, the present invention adopts the following technical scheme:
The earth current safe early warning specialist analytical method of cable in a kind of tunnel, comprising the following steps:
Step 1: alarm threshold value and filter condition are set in monitor supervision platform；Wherein, alarm threshold value includes that jump is abnormal
The abnormal threshold value of threshold value, the threshold value of absolute value exception, alternate comparison, filter condition exist three include: continuously generate it is extremely secondary
Number, the comparison of abnormal current duration, period；
Step 2: number, the name information of each monitor terminal are loaded in monitor supervision platform；
Step 3: the current value of cable and when acquisition in the tunnel that monitor supervision platform real-time reception is acquired by each monitor terminal
Between；
Step 4: earth current is anomaly divided into three classes: jump is abnormal, absolute value is abnormal and alternate comparison is abnormal；Successively
Judge the earth current of each monitor terminal acquisition with the presence or absence of above-mentioned exception；
Step 5: the current anomaly analysis result in step 4 being filtered, specifically include: continuously generating frequency of abnormity is
It is no reach given threshold, whether the abnormal current duration reaches given threshold, with the presence or absence of current value phase in same time period
Together；When above-mentioned filter condition is all satisfied, alarm is generated；
Step 6: filtered earth current anomaly analysis result is exported in monitor supervision platform.
Further, in the step 4, earth current is anomaly divided into three classes: jump exception, absolute value exception and phase
Between compare it is abnormal；
(1) jump is abnormal: judging the current value variation within the setting time received, adjacent electric current electricity received twice
Flow valuve change rate has exceeded the positive change rate threshold value of setting or has exceeded inverse change rate threshold value, then is judged as that jump is different
Often；
(2) absolute value is abnormal: whether the current value that judgement receives every time has exceeded the threshold value of setting, if exceeding threshold value
Then it is judged as absolute value exception；
(3) alternate comparison is abnormal: the ratio of maximum current and minimum current in received three-phase current is judged, if described
Threshold value is more than the threshold value of setting, then is judged as that alternate comparison is abnormal.
Further, in the step 5,
(1) it continuously generates whether frequency of abnormity reaches given threshold: judging whether abnormal current value meets continuous appearance, and
And continuously there is the number that frequency of abnormity reaches setting；If conditions are not met, then current anomaly is filtered；
(2) whether the abnormal current duration reaches given threshold: judging whether the time that abnormal current persistently occurs reaches
The duration threshold for having arrived setting, if conditions are not met, then current anomaly is filtered；
(3) identical with the presence or absence of current value in same time period: judge in the number of days of setting in the past in the identical period whether
It is identical as present current value that there are current values, and if there is identical current value, then current anomaly is filtered.
Beneficial effects of the present invention:
1, implementation through the invention, may be implemented the early warning analysis to tunnel grounding electric current, and it is different effectively to detect electric current
Reason condition.The current anomaly for being directed to lasting generation simultaneously carries out analysis and early warning.
2, by the judgement of " continuous frequency of occurrence " and " continue time of origin " condition, current noise and accidentally can be rejected
Current fluctuation is influenced caused by analysis result, reduces the generation of early warning result wrong report.
3, judged by " comparison of period " condition, it can't the peak of daily normal electricity consumption, low-valley interval is this
The variation of normality is mistaken for current anomaly variation.
Detailed description of the invention
Fig. 1 is earth current security early-warning analysis overall flow figure of the invention；
It is illustrated in Fig. 2 to whether electric current the schematic diagram judged extremely continuously occurs.
Specific embodiment
The invention will be further described with embodiment with reference to the accompanying drawing.
The earth current safe early warning specialist analytical method of cable is realized in monitor supervision platform in tunnel of the invention, monitoring
Platform is communicated with each monitor terminal, and monitor terminal can acquire the earth current value of tunnel cable and record acquisition time.
The invention discloses a kind of earth current safe early warning specialist analytical methods of cable in tunnel, as shown in Figure 1, packet
It includes:
Step 1: alarm threshold value and filter condition are set in monitor supervision platform；Wherein, alarm threshold value includes that jump is abnormal
The abnormal threshold value of threshold value, the threshold value of absolute value exception, alternate comparison, filter condition exist three include continuously generate it is extremely secondary
Number, the comparison of abnormal current duration, period；
Step 2: number, the name information of each monitor terminal are loaded in monitor supervision platform；
Step 3: the current value of cable and when acquisition in the tunnel that monitor supervision platform real-time reception is acquired by each monitor terminal
Between；
Step 4: earth current is anomaly divided into three classes: jump is abnormal, absolute value is abnormal and alternate comparison is abnormal；Successively
Judge the earth current of each monitor terminal acquisition with the presence or absence of above-mentioned exception；
Step 5: the current anomaly analysis result in step 4 being filtered, specifically include: continuously generating frequency of abnormity is
It is no reach given threshold, whether the abnormal current duration reaches given threshold, with the presence or absence of identical in passing setting number of days
Current value is identical with present current value in period；When above-mentioned filter condition is all satisfied, alarm is generated；
Step 6: filtered earth current anomaly analysis result is exported in monitor supervision platform.
In the present invention, the earth current safe early warning specialist analytical method of cable includes two parts:
First part is the detection judgement to current anomaly, including current-jump judgement, absolute value judgement, phase extremely extremely
Between compare abnormal judgement.Detect that any one current anomaly will enter second part.
Second part is filtered to current anomaly analysis result, and real alarm condition is enable to be detected after filtering
Processing, prevents from reporting by mistake.Second part includes abnormal continuous frequency of occurrence, continues time of origin, period comparison.Simultaneously meet with
Upper three filter conditions analysis result is alarm, and it is normal for otherwise analyzing result.
1, it is the current anomaly judgement of first part below:
(1) jump is abnormal: variation is beyond rising change rate (S) or decline change rate (X).Judge present current value and upper
Whether the current value change rate of primary current value comparison is more than change rate.
(2) absolute value is abnormal: judging whether current value is more than maximum value (Max) or is lower than minimum value (Min).
(3) alternate comparison is abnormal: the ratio of maximum current and minimum current in received three-phase current is judged, if A phase
Electric current is maximum, and B electric currents are minimum, then the ratio of A and B electric currents with regard to and threshold value comparison, it is alternate right to be taken as beyond threshold value
Than exception.
2, it is the filtering screening to abnormal current of second part below:
(1) continuous frequency of occurrence: judging whether abnormal current value meets continuous appearance, and continuously occurs reaching setting
Number.It is filtered if being unsatisfactory for.
(2) continue time of origin: the time that abnormal current persistently occurs.The duration of setting is not met just by mistake
Filter.
(3) period compares: judging in the same time in the number of days of setting with the presence or absence of current value and current flow
It is worth identical, is filtered if identical.
Current fluctuation once in a while may be that the current noise of acquisition causes.This will not run cable and impact, we
It can be a kind of failure certainly because this is not that the current noise of acquisition causes more concerned with the continuous abnormal fluctuation of lasting generation
Cause current anomaly.
But if only focusing on the lasting time of origin of unusual fluctuations, it is possible it be merely creating abnormal current twice, only
It is that interval time twice is long；If only focusing on the continuous frequency of occurrence of unusual fluctuations, it is possible it only when of short duration
It is interior to have occurred repeatedly.
The present invention measures continuous frequency of occurrence and lasting time of origin simultaneously, is different within the scope of certain time in order to focus on
The number that normal electric current generates, it may be assumed that the density that abnormal current occurs.If density has exceeded our expection (threshold value), just this
Kind abnormal current is judged as alarm status.The generation that wrong report can be reduced in this way, improves the accuracy of judging result.
By the screening of the above filter condition, accidental current anomaly situation can be filtered away.But normality (continues
Occur) current anomaly operating status can be monitored, and judged by " comparison of period " condition, can't be
The variation on the peak, this normality of low-valley interval of daily normal electricity consumption is mistaken for current anomaly variation.
It is illustrated in Fig. 2 to whether electric current the abnormal sliding window schematic diagram judged continuously occurs.
(1) continuous frequency of occurrence condition judgement
If continuous frequency of occurrence is m, then sliding window length is m+1.When receiving new current value A, sliding window
Then mouth is compared judgement to the current value of window ranges toward one lattice of front slide.
(a) abnormal for current break:
Adjacent current in window ranges is compared, if continuously m adjacent current value forward direction compares (or reversed ratio
Compared with) ratio both greater than be mutated threshold value, then meeting continuous frequency of occurrence condition.
(b) it transfinites exception for electric current:
Electric current in window ranges and the threshold value that transfinites are compared, the threshold value if continuous m primary current value both greater than transfinites, that
Meet continuous frequency of occurrence condition.
(c) abnormal for the alternate comparison of electric current: to be respectively compared any two of three-phase current.
The ratio of the maximum current and minimum current in three-phase current is calculated, if occurring maximum current and most for continuous m times
The ratio of low current just meets continuous frequency of occurrence condition beyond the case where threshold value.
The adjacent time interval of current receiv twice cannot exceed 1 hour, otherwise empty to the current value in window ranges, directly
Judge again to being filled up after window again.
(2) continue time of origin judgement
Analysis expert software records sliding window is T1, timer initiation meter in the time for detecting abnormal current for the first time
When, if sliding window still detects that abnormal current exists after the T2 time, and meets T2-T1 and be greater than continuing for setting
Cumulative time, then just meeting the condition that abnormal current persistently occurs.
(3) period comparison judgement
Analysis expert software records sliding window is T1 in the time for detecting abnormal current for the first time, is then checked previous
It T1 period changes record either with or without the abnormal current of same type.If there is record, when continuing T1 with the previous day again
Section comparison, if having anomalous variation record in N days of setting, this anomalous variation for being judged as electric current belongs to normality variation
Process.
Above-mentioned, although the foregoing specific embodiments of the present invention is described with reference to the accompanying drawings, not protects model to the present invention
The limitation enclosed, those skilled in the art should understand that, based on the technical solutions of the present invention, those skilled in the art are not
Need to make the creative labor the various modifications or changes that can be made still within protection scope of the present invention.
Claims (3)
1. the earth current safe early warning specialist analytical method of cable in a kind of tunnel, characterized in that the following steps are included:
Step 1: alarm threshold value and filter condition are set in monitor supervision platform；Wherein, alarm threshold value include the abnormal threshold value of jump,
The abnormal threshold value of the threshold value of absolute value exception, alternate comparison, filter condition includes continuously generating frequency of abnormity, exception there are three
Current duration, the comparison of period；
Step 2: number, the name information of each monitor terminal are loaded in monitor supervision platform；
Step 3: the current value and acquisition time of cable in the tunnel that monitor supervision platform real-time reception is acquired by each monitor terminal；
Step 4: earth current is anomaly divided into three classes: jump is abnormal, absolute value is abnormal and alternate comparison is abnormal；Successively judge
The earth current of each monitor terminal acquisition whether there is above-mentioned exception；
Step 5: the current anomaly analysis result in step 4 being filtered, specifically includes: continuously generating whether frequency of abnormity reaches
Whether reach given threshold, with the presence or absence of in the identical period in passing setting number of days to given threshold, abnormal current duration
Current value is identical with present current value；When above-mentioned filter condition is all satisfied, alarm is generated；
Step 6: filtered earth current anomaly analysis result is exported in monitor supervision platform.
2. the earth current safe early warning specialist analytical method of cable in a kind of tunnel as described in claim 1, characterized in that
In the step 4, earth current is anomaly divided into three classes: jump is abnormal, absolute value is abnormal and alternate comparison is abnormal；
(1) jump is abnormal: judging the current value change rate within the setting time received, the adjacent electric current for receiving electric current twice
Value change rate has exceeded the positive change rate threshold value of setting or has exceeded inverse change rate threshold value, then is judged as that jump is abnormal；
(2) absolute value is abnormal: whether the current value that judgement receives every time has exceeded the threshold value of setting, sentences if beyond threshold value
Break as absolute value exception；
(3) alternate comparison is abnormal: the ratio of maximum current and minimum current in received three-phase current is judged, if the threshold value
More than the threshold value of setting, then it is judged as that alternate comparison is abnormal.
3. the earth current safe early warning specialist analytical method of cable in a kind of tunnel as described in claim 1, characterized in that
In the step 5,
(1) it continuously generates whether frequency of abnormity reaches given threshold: judging whether abnormal current value meets continuous appearance, and even
It is continuous the number that frequency of abnormity reaches setting occur；If conditions are not met, then current anomaly is filtered；
(2) whether the abnormal current duration reaches given threshold: judging whether the time that abnormal current persistently occurs reaches
The duration threshold of setting, if conditions are not met, then current anomaly is filtered；
(3) identical with the presence or absence of current value in same time period: to judge whether deposit in the same time in the period of setting
Identical as present current value in current value, if there is identical current value, then current anomaly is filtered.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611082788.0A CN106645870B (en) | 2016-11-30 | 2016-11-30 | The earth current safe early warning specialist analytical method of cable in a kind of tunnel |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611082788.0A CN106645870B (en) | 2016-11-30 | 2016-11-30 | The earth current safe early warning specialist analytical method of cable in a kind of tunnel |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106645870A CN106645870A (en) | 2017-05-10 |
| CN106645870B true CN106645870B (en) | 2019-05-17 |
Family
ID=58813401
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201611082788.0A Active CN106645870B (en) | 2016-11-30 | 2016-11-30 | The earth current safe early warning specialist analytical method of cable in a kind of tunnel |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106645870B (en) |
Families Citing this family (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109309376A (en) * | 2017-07-26 | 2019-02-05 | 新特能源股份有限公司 | Reduction furnace power ground protective device and method |
| CN108318779A (en) * | 2017-12-26 | 2018-07-24 | 国网河北省电力有限公司景县供电分公司 | Line fault monitoring method, device, computer readable storage medium and equipment |
| KR102103147B1 (en) * | 2018-03-14 | 2020-04-22 | (주)아이티공간 | Predictive maintenance method of driving device |
| KR102103150B1 (en) | 2018-03-14 | 2020-04-22 | (주)아이티공간 | Predictive maintenance method of driving device |
| KR102103145B1 (en) | 2018-03-14 | 2020-04-22 | (주)아이티공간 | Predictive maintenance method of driving device |
| KR102103143B1 (en) | 2018-03-14 | 2020-04-22 | (주)아이티공간 | Predictive maintenance method of driving device |
| KR102103144B1 (en) * | 2018-03-14 | 2020-04-22 | (주)아이티공간 | Predictive maintenance method of driving device |
| CN111383427B (en) * | 2018-12-29 | 2021-11-09 | 大富科技(安徽)股份有限公司 | LNA (Low noise amplifier) equipment and alarm method thereof |
| CN109959862A (en) * | 2019-03-12 | 2019-07-02 | 杭州长川科技股份有限公司 | A kind of integrated circuit test device real time temperature monitoring system and method |
| CN112448861B (en) * | 2019-08-30 | 2022-07-29 | 北京国双科技有限公司 | Edge device processing method and device, storage medium and processor |
| CN110647093B (en) * | 2019-11-13 | 2021-01-08 | 上海迈内能源科技有限公司 | Intelligent monitoring system and monitoring method for power system based on big data analysis |
| CN113189503A (en) * | 2021-01-28 | 2021-07-30 | 南斗六星系统集成有限公司 | Multi-stage fault early warning method and system for battery of electric vehicle |
| CN114566878B (en) * | 2022-03-08 | 2022-11-04 | 东营金丰正阳科技发展有限公司 | Control method of intelligent fire-fighting electrical control equipment for oil field |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4716487A (en) * | 1986-05-05 | 1987-12-29 | Automeg, Inc. | Apparatus for monitoring motor winding leakage |
| CN102866289A (en) * | 2012-09-05 | 2013-01-09 | 山东康威通信技术股份有限公司 | Power cable sheath grounding current fault analysis method |
| CN102928728A (en) * | 2012-10-30 | 2013-02-13 | 清华大学 | High-resistance grounding fault detection method based on zero-sequence current waveform distortion convexity and concavity |
| CN105807126A (en) * | 2016-04-28 | 2016-07-27 | 四川瑞霆电力科技有限公司 | Overhead distribution line zero-sequence current acquisition terminal and method based on clock synchronization |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US9541596B2 (en) * | 2013-08-29 | 2017-01-10 | Intermountain Electronics, Inc. | Multi-frequency ground monitor current sensing without a DC component |
-
2016
- 2016-11-30 CN CN201611082788.0A patent/CN106645870B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4716487A (en) * | 1986-05-05 | 1987-12-29 | Automeg, Inc. | Apparatus for monitoring motor winding leakage |
| CN102866289A (en) * | 2012-09-05 | 2013-01-09 | 山东康威通信技术股份有限公司 | Power cable sheath grounding current fault analysis method |
| CN102866289B (en) * | 2012-09-05 | 2014-10-29 | 山东康威通信技术股份有限公司 | Power cable sheath grounding current fault analysis method |
| CN102928728A (en) * | 2012-10-30 | 2013-02-13 | 清华大学 | High-resistance grounding fault detection method based on zero-sequence current waveform distortion convexity and concavity |
| CN105807126A (en) * | 2016-04-28 | 2016-07-27 | 四川瑞霆电力科技有限公司 | Overhead distribution line zero-sequence current acquisition terminal and method based on clock synchronization |
Non-Patent Citations (1)
| Title |
|---|
| 电缆接地线电流在线监测技术的应用;付炳哲;《莱钢科技》;20140413(第2期);第13页 * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN106645870A (en) | 2017-05-10 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN106645870B (en) | The earth current safe early warning specialist analytical method of cable in a kind of tunnel | |
| CN103744389B (en) | Early warning method for running state of oil and gas production equipment | |
| CN107831422B (en) | GIS equipment partial discharge diagnosis method and system | |
| CN104569683B (en) | A kind of detection method of fault electric arc | |
| CN108429348A (en) | A kind of wisdom Electrical Safety system | |
| CN108520187A (en) | Industrial control system physics Network Intrusion detection method based on the analysis of serial communication bus signal | |
| CN107632234B (en) | A kind of deformation of transformer winding appraisal procedure based on recorder data | |
| CN204269739U (en) | Based on thunderbolt diagnosis and the real time warning device of leakage conductor | |
| CN113505241B (en) | Intelligent diagnosis method for potential safety hazards of electricity consumption based on knowledge graph | |
| CN110866616A (en) | Fault early warning method and device for secondary equipment of transformer substation | |
| CN105510760A (en) | Method for detecting short circuit fault data based on wavelet analysis | |
| CN108196170A (en) | A kind of fault electric arc detecting system and method | |
| CN104063987A (en) | Nuclear power station master control room back-up disk alarm method, and nuclear power station master control room back-up disk alarm system | |
| CN105306439A (en) | Feature rule detection method based on decision tree self-repairing | |
| CN207926282U (en) | A kind of wisdom Electrical Safety system | |
| CN109888729A (en) | A kind of early warning type transformer protection method and device | |
| CN109298700B (en) | Method and system for judging abnormal change of operation parameters of thermal power generating unit in real time | |
| CN115656812A (en) | Motor real-time state multi-dimensional monitoring method and system | |
| CN204086977U (en) | A kind of interlock alarm system based on sensor fault diagnosis technology | |
| CN104020758B (en) | Gateway communication abnormality self-diagnosing method and system in Nuclear power plants dcs | |
| CN102231222A (en) | Electric fire monitoring method | |
| CN105486982A (en) | Power grid device distributed fault diagnosis method | |
| CN108683639A (en) | A kind of computer network abnormality detection and automatic repair system, method and mobile terminal | |
| CN114942364A (en) | Substation fault diagnosis method and system based on knowledge graph technology | |
| CN209070534U (en) | A kind of information security of computer network system |
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 | ||
| GR01 | Patent grant | ||
| 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 |