CN103823144A  Highvoltage shunt power capacitor operational monitoring system and method  Google Patents
Highvoltage shunt power capacitor operational monitoring system and method Download PDFInfo
 Publication number
 CN103823144A CN103823144A CN201410097179.7A CN201410097179A CN103823144A CN 103823144 A CN103823144 A CN 103823144A CN 201410097179 A CN201410097179 A CN 201410097179A CN 103823144 A CN103823144 A CN 103823144A
 Authority
 CN
 China
 Prior art keywords
 capacitor
 resonance
 value
 current
 voltage
 Prior art date
Links
 239000003990 capacitor Substances 0.000 title claims abstract description 142
 238000004458 analytical method Methods 0.000 claims abstract description 51
 230000001052 transient Effects 0.000 claims description 13
 210000000352 storage cell Anatomy 0.000 claims description 8
 238000004082 amperometric method Methods 0.000 claims description 3
 230000001143 conditioned Effects 0.000 claims description 3
 238000011156 evaluation Methods 0.000 claims description 3
 238000009434 installation Methods 0.000 claims description 3
 238000005070 sampling Methods 0.000 claims description 3
 230000000694 effects Effects 0.000 abstract description 2
 238000000034 method Methods 0.000 description 11
 238000005516 engineering process Methods 0.000 description 2
 238000004364 calculation method Methods 0.000 description 1
 238000010586 diagram Methods 0.000 description 1
 238000009413 insulation Methods 0.000 description 1
Abstract
The invention discloses a highvoltage shunt power capacitor operational monitoring system and a monitoring method thereof. The system is characterized in that an electric energy quality data acquisition unit is respectively connected with a capacitor switching monitoring module, a capacitor resonance early warning module and a parallel resonance auxiliary analysis module through a data storage unit; the capacitor switching monitoring module and the capacitor resonance early warning module are respectively connected to a switching data summarization and resonance early warning module; the parallel resonance auxiliary analysis module is connected with the capacitor resonance early warning module. The system has the beneficial effects that the provided operational monitoring scheme is systematic and comprehensive, the analysis result is closer to the actual requirement, the investment is low, and excessive special instruments are not needed to be increased.
Description
Technical field
The present invention relates to a kind of operation monitoring system and monitoring method of the parallel power condenser, particularly the switching process monitoring of the parallel power condenser and online resonance early warning technology field.
Background technology
Highvoltage parallel capacitor is electrical equipment common in electric system, drops into shnt capacitor, can buckingout system reactive power, improve busbar voltage and power factor; Otherwise excision shnt capacitor, can reduce busbar voltage and power factor.
It is high that highvoltage parallel capacitor has failure rate, is difficult for finding the feature of failure cause, therefore carries out the operational monitoring of highvoltage parallel electric capacity significant for the safe and reliable operation of fault analysis timely and assurance electric system.From statistics, capacitor faults mainly comprises three major types: the one, and capacitor resonance; The 2nd, other electrical equipment defect causes capacitor operational defect, as the breaker apparatus defect of control capacitor switching and restriking of producing, or reactor arrangement defect and produce electric capacity and shove; The 3rd, the inherent equipment deficiency of capacitor, the electric parameters being characterized by switching process changes.Thus, the present invention, emphatically from the early warning of capacitor resonance and two angles of capacitor switching process monitoring, carries out capacitor operational monitoring is studied.By the switching process monitoring to capacitor, whether normally can objectively respond capacitor running status, whether exist restrike, switching overvoltage, electric capacity shove and the variation of electric parameters whether normal etc.; Can judge by the resonance early warning analysis to capacitor whether capacitor exists resonance operation risk, and the type of resonance.
Summary of the invention
The technical problem to be solved in the present invention is: propose a kind of the parallel power condenser switching process monitoring system in parallel, to meet monitoring and the analysis demand to capacitor switching process.
What the present invention will solve is achieved by the following technical solution.
A kind of highvoltage bridging capacitor operation monitoring system, is characterized in that, is connected respectively by data storage cell by power quality data collecting unit with capacitor switching monitoring modular, capacitor resonance warning module, parallel resonance assistant analysis module; Wherein: capacitor switching monitoring modular, capacitor resonance warning module are connected respectively to that switching data gather and resonance warning module; Parallel resonance assistant analysis module is also connected with capacitor resonance warning module.
A monitoring method for highvoltage bridging capacitor operation monitoring system, is characterized in that, the use of each unit and module:
Power quality data collecting unit is in order to realize: (1) is by the voltage effective value of current effective value, shnt capacitor branch road CT2 current effective value and the lowvoltage bus bar PT of 3 minutes cycle continuous acquisition step down side CT1; (2) by voltage waveform and the current waveform in jumpvalue of current trigger recording capacitor switching moment are set, data sampling rate is not less than 64 points/cycle; (3) possess harmonic wave record and analytic function, realize the harmonic voltage/amperometry of 213 time;
Data storage cell is in order to realize the storage of power quality data collecting unit and device parameter data; The data type of storing comprises: the 213 subharmonic voltage of the steadystate current/voltage before and after capacitor switching, the 213 subharmonic current of voltage/current waveform, CT1 and the CT2 in capacitor switching moment, PT, the capacity of short circuit at capacitor bus place, go here and there antirate, capacitor compensation capacity;
Capacitor switching monitoring modular, capacitor resonance warning module and parallel resonance assistant analysis module are that data are carried out respectively to capacitor switching analysis and resonance early warning analysis, and final analysis result is sent to switching data gather and resonance warning module, carry out the online operation monitoring and evaluation of capacitor;
Monitoring method:
Capacitor switching monitoring modular
(1) by transferring the transient current waveform of throwing the capacitor moment, analyze electric capacity and shove, judge whether its value is greater than 20 times of fundamental current; (2) by transferring the transient current waveform of cutting the capacitor moment, there is afterflow phenomenon after judging whether to exist waveform zero passage, there is capacitor and restrike; (3) judge by transferring the voltage waveform in capacitor switching moment whether maximum transient overvoltage value is greater than 1.1 times of rated voltage; (4) by transferring the steady state voltage value before and after capacitor switching, judge whether its value is greater than 1.05 times of load voltage value; (5) by transferring the steadystate current value before and after capacitor switching, judge whether its value is greater than 1.37 times of load current value;
Capacitor resonance warning module: (1) exceeds standard limited value by judging that the harmonic current of single judges whether to exist, and judges whether to have occurred amplified harmonic current with this; (2) calculate respectively parallel resonant point and series resonance point according to following formula:
Series resonance computing formula is:
In formula, Qcx represents to occur the condenser capacity of nth harmonic resonance; S
_{d}represent the busbar shortcircuit capacity of parallel capacitor device installation place; N represents overtone order; Kreactance Rate.
The computing formula of parallel resonant point is:
X in formula
_{c}for the capacitor value of capacitor group; X
_{l}for the reactance value of capacitor group series reactance;
If exist harmonic current to exceed standard, and the parallel resonant point calculating or series resonance point are less than 0.1 judgement with the absolute value of the difference of adjacent integral frequency harmonizing wave and meet parallel resonance conditioned disjunction series resonance condition; If all do not meet, only generate the harmonic current early warning that exceeds standard;
Directly send out series resonance early warning signal if meet series resonance condition; If meet parallel resonance condition, also need to start parallel resonance assistant analysis module and do further assistant analysis;
Parallel resonance assistant analysis module, foundation: the harmonic current I at the CT1 place that record (1)
_{cT1}harmonic current I with CT2 place
_{cT2}there is the amplified harmonic current of homogeneous simultaneously; (2) U/I
_{cT1}with U/I
_{cT2}the imaginary part of symbol of the vector that obtains is contrary; Meet these two condition judgment and meet parallel resonance assistant analysis condition;
Switching data gather and resonance warning module: (1) stores the data of capacitor switching monitoring modular each time, carry out data and gather; (2) analysis result of integrated capacitor resonance warning module and parallel resonance assistant analysis module judges whether to occur resonance and resonant type,, if meet parallel resonance condition and parallel resonance assistant analysis condition, send out parallel resonance early warning signal simultaneously; Meet series resonance condition and directly send out series resonance early warning signal; The most close which integral frequency harmonizing wave of tuningpoints calculating is this subharmonic resonance.
The invention has the beneficial effects as follows, provide a kind of by capacitor switching process monitoring, parallel resonance assistant analysis and resonance early warning, the method for online monitoring capacitor running status.Capacitor switching is the capacitor operation that often can produce in service; also be the operating weak link of capacitor; capacitor resonance is the common culprit of capacitor and type; by the monitoring to these two aspects and analysis, can find in time potential risk and operation troubles that capacitor is in operation.Current existing capacitor operational monitoring method or the insulation dissipation factor of monitoring capacitor, or the volume change of monitoring capacitor, by comparison, operational monitoring scheme provided in this article is more adding system and comprehensive of system more, the analysis result demand that more corresponds to reality, and invest very littlely, do not need to increase too much specialized equipment.
Accompanying drawing explanation
Fig. 1 is system framework figure of the present invention;
Fig. 2 is switching process monitoring embodiment schematic diagram of the present invention.
Embodiment
Below in conjunction with accompanying drawing, content of the present invention is described in further detail.
See Fig. 1, Fig. 2, a kind of highvoltage bridging capacitor operation monitoring system, the present invention is characterised in that, is connected respectively by data storage cell by power quality data collecting unit with capacitor switching monitoring modular, capacitor resonance warning module, parallel resonance assistant analysis module; Wherein: capacitor switching monitoring modular, capacitor resonance warning module are connected respectively to that switching data gather and resonance warning module; Parallel resonance assistant analysis module is also connected with capacitor resonance warning module.
A monitoring method for highvoltage bridging capacitor operation monitoring system, is characterized in that, the use of each unit and module:
Power quality data collecting unit is in order to realize: (1) is by the voltage effective value of current effective value, shnt capacitor branch road CT2 current effective value and the lowvoltage bus bar PT of 3 minutes cycle continuous acquisition step down side CT1; (2) by voltage waveform and the current waveform in jumpvalue of current trigger recording capacitor switching moment are set, data sampling rate is not less than 64 points/cycle; (3) possess harmonic wave record and analytic function, realize the harmonic voltage/amperometry of 213 time;
Data storage cell is in order to realize the storage of power quality data collecting unit and device parameter data; The data type of storing comprises: the 213 subharmonic voltage of the steadystate current/voltage before and after capacitor switching, the 213 subharmonic current of voltage/current waveform, CT1 and the CT2 in capacitor switching moment, PT, the capacity of short circuit at capacitor bus place, go here and there antirate, capacitor compensation capacity;
Capacitor switching monitoring modular, capacitor resonance warning module and parallel resonance assistant analysis module are that data are carried out respectively to capacitor switching analysis and resonance early warning analysis, and final analysis result is sent to switching data gather and resonance warning module, carry out the online operation monitoring and evaluation of capacitor;
Monitoring method:
Capacitor switching monitoring modular
(1) by transferring the transient current waveform of throwing the capacitor moment, analyze electric capacity and shove, judge whether its value is greater than 20 times of fundamental current; (2) by transferring the transient current waveform of cutting the capacitor moment, there is afterflow phenomenon after judging whether to exist waveform zero passage, there is capacitor and restrike; (3) judge by transferring the voltage waveform in capacitor switching moment whether maximum transient overvoltage value is greater than 1.1 times of rated voltage; (4) by transferring the steady state voltage value before and after capacitor switching, judge whether its value is greater than 1.05 times of load voltage value; (5) by transferring the steadystate current value before and after capacitor switching, judge whether its value is greater than 1.37 times of load current value;
Capacitor resonance warning module: (1) exceeds standard limited value by judging that the harmonic current of single judges whether to exist, and judges whether to have occurred amplified harmonic current with this; (2) calculate respectively parallel resonant point and series resonance point according to following formula:
Series resonance computing formula is:
In formula, Qcx represents to occur the condenser capacity of nth harmonic resonance; S
_{d}represent the busbar shortcircuit capacity of parallel capacitor device installation place; N represents overtone order; Kreactance Rate.
The computing formula of parallel resonant point is:
X in formula
_{c}for the capacitor value of capacitor group; X
_{l}for the reactance value of capacitor group series reactance;
If exist harmonic current to exceed standard, and the parallel resonant point calculating or series resonance point are less than 0.1 judgement with the absolute value of the difference of adjacent integral frequency harmonizing wave and meet parallel resonance conditioned disjunction series resonance condition; If all do not meet, only generate the harmonic current early warning that exceeds standard;
Directly send out series resonance early warning signal if meet series resonance condition; If meet parallel resonance condition, also need to start parallel resonance assistant analysis module and do further assistant analysis;
Parallel resonance assistant analysis module, foundation: the harmonic current I at the CT1 place that record (1)
_{cT1}harmonic current I with CT2 place
_{cT2}there is the amplified harmonic current of homogeneous simultaneously; (2) U/I
_{cT1}with U/I
_{cT2}the imaginary part of symbol of the vector that obtains is contrary; Meet these two condition judgment and meet parallel resonance assistant analysis condition;
Switching data gather and resonance warning module: (1) stores the data of capacitor switching monitoring modular each time, carry out data and gather; (2) analysis result of integrated capacitor resonance warning module and parallel resonance assistant analysis module judges whether to occur resonance and resonant type,, if meet parallel resonance condition and parallel resonance assistant analysis condition, send out parallel resonance early warning signal simultaneously; Meet series resonance condition and directly send out series resonance early warning signal; The most close which integral frequency harmonizing wave of tuningpoints calculating is this subharmonic resonance.
Be illustrated in figure 1 system framework figure of the present invention.Capacitor switching process monitoring system is made up of electric energy quality monitoring terminal, data storage cell and capacitor switching process monitoring module.
Be illustrated in figure 2 calculation procedure of the present invention.
The 213 subharmonic current data of current effective value, CT1 and the CT2 of CT2 are read in timings in every 3 minutes from data storage cell;
Step 1: read the current effective value of CT2, judge whether to exist current break, judge whether to have occurred capacitor switching operation with this;
Step 2: read the 213 subharmonic current amplitude of CT2, judge whether to exist the harmonic current situation that exceeds standard;
Step 3: if there is capacitor switching operation, judgement is to drop into also excision operation of operation, that is, current effective value is excision operation from ratings to zero, operates for dropping into from zero to ratings;
Step 4: by transferring the transient current waveform of throwing the capacitor moment, analyze maximum capacitor and shove, judge whether its value is greater than 20 times of fundamental current;
Step 5: by transferring the transient current waveform of cutting the capacitor moment, have afterflow phenomenon after judging whether to exist waveform zero passage, capacitor occurs and restrike;
Step 6: judge by transferring the voltage waveform in capacitor switching moment whether maximum transient overvoltage value is greater than 1.1 times of rated voltage;
Step 7: by transferring the steady state voltage value before and after capacitor switching, judge whether its value is greater than 1.05 times of load voltage value;
Step 8: by transferring the steadystate current value before and after capacitor switching, judge whether its value is greater than 1.37 times of load current value;
Step 9: by switching operation, the value of shoving, whether restrike, steadystate current, transient voltage, steady state voltage value be sent to that switching data gather and resonance warning module;
Step 10: if exist harmonic current to exceed GB limit value, according to formula
with
calculate respectively parallel resonant point and series resonance point;
Step 11: judgement is series resonance or parallel resonance; Directly judge and meet series resonance condition if the series resonance point calculating is less than 0.1 with the absolute value of the difference of adjacent integer; If the absolute value of the difference of the parallel resonant point calculating and adjacent integer is less than 0.1, judgement meets parallel resonance condition and starts parallel resonance assistant analysis module; If all do not met, only generate the harmonic current early warning that exceeds standard;
Step 12: parallel resonance assistant analysis module, foundation: the harmonic current I at the CT1 place that record (1)
_{cT1}harmonic current I with CT2 place
_{cT2}there is the amplified harmonic current of homogeneous simultaneously; (2) U/I
_{cT1}with U/I
_{cT2}the imaginary part of symbol of the vector that obtains is contrary; Meeting these two conditions judges and meets parallel resonance assistant analysis condition
Step 13: be sent to by calculating or analyze the resonant type that obtains and resonance early warning number of times information that switching data gather and resonance warning module, carry out the storage of data;
Step 14: the gathering and the generation of capacitor resonance early warning record of capacitor switching data.
Claims (2)
1. a highvoltage bridging capacitor operation monitoring system, is characterized in that, is connected respectively by data storage cell by power quality data collecting unit with capacitor switching monitoring modular, capacitor resonance warning module, parallel resonance assistant analysis module; Wherein: capacitor switching monitoring modular, capacitor resonance warning module are connected respectively to that switching data gather and resonance warning module; Parallel resonance assistant analysis module is also connected with capacitor resonance warning module.
2. the monitoring method of a kind of highvoltage bridging capacitor operation monitoring system according to claim 1, is characterized in that, the use of each unit and module:
Power quality data collecting unit is in order to realize: (1) is by the voltage effective value of current effective value, shnt capacitor branch road CT2 current effective value and the lowvoltage bus bar PT of 3 minutes cycle continuous acquisition step down side CT1; (2) by voltage waveform and the current waveform in jumpvalue of current trigger recording capacitor switching moment are set, data sampling rate is not less than 64 points/cycle; (3) possess harmonic wave record and analytic function, realize the harmonic voltage/amperometry of 213 time;
Data storage cell is in order to realize the storage of power quality data collecting unit and device parameter data; The data type of storing comprises: the 213 subharmonic voltage of the steadystate current/voltage before and after capacitor switching, the 213 subharmonic current of voltage/current waveform, CT1 and the CT2 in capacitor switching moment, PT, the capacity of short circuit at capacitor bus place, go here and there antirate, capacitor compensation capacity;
Capacitor switching monitoring modular, capacitor resonance warning module and parallel resonance assistant analysis module are that data are carried out respectively to capacitor switching analysis and resonance early warning analysis, and final analysis result is sent to switching data gather and resonance warning module, carry out the online operation monitoring and evaluation of capacitor;
Monitoring method:
Capacitor switching monitoring modular
(1) by transferring the transient current waveform of throwing the capacitor moment, analyze electric capacity and shove, judge whether its value is greater than 20 times of fundamental current; (2) by transferring the transient current waveform of cutting the capacitor moment, there is afterflow phenomenon after judging whether to exist waveform zero passage, there is capacitor and restrike; (3) judge by transferring the voltage waveform in capacitor switching moment whether maximum transient overvoltage value is greater than 1.1 times of rated voltage; (4) by transferring the steady state voltage value before and after capacitor switching, judge whether its value is greater than 1.05 times of load voltage value; (5) by transferring the steadystate current value before and after capacitor switching, judge whether its value is greater than 1.37 times of load current value;
Capacitor resonance warning module: (1) exceeds standard limited value by judging that the harmonic current of single judges whether to exist, and judges whether to have occurred amplified harmonic current with this; (2) calculate respectively parallel resonant point and series resonance point according to following formula:
Series resonance computing formula is:
In formula, Qcx represents to occur the condenser capacity of nth harmonic resonance; S
_{d}represent the busbar shortcircuit capacity of parallel capacitor device installation place; N represents overtone order; Kreactance Rate;
The computing formula of parallel resonant point is:
X in formula
_{c}for the capacitor value of capacitor group; X
_{l}for the reactance value of capacitor group series reactance;
If exist harmonic current to exceed standard, and the parallel resonant point calculating or series resonance point are less than 0.1 judgement with the absolute value of the difference of adjacent integral frequency harmonizing wave and meet parallel resonance conditioned disjunction series resonance condition; If all do not meet, only generate the harmonic current early warning that exceeds standard;
Directly send out series resonance early warning signal if meet series resonance condition; If meet parallel resonance condition, also need to start parallel resonance assistant analysis module and do further assistant analysis;
Parallel resonance assistant analysis module, foundation: the harmonic current I at the CT1 place that record (1)
_{cT1}harmonic current I with CT2 place
_{cT2}there is the amplified harmonic current of homogeneous simultaneously; (2) U/I
_{cT1}with U/I
_{cT2}the imaginary part of symbol of the vector that obtains is contrary; Meet these two condition judgment and meet parallel resonance assistant analysis condition;
Switching data gather and resonance warning module: (1) stores the data of capacitor switching monitoring modular each time, carry out data and gather; (2) analysis result of integrated capacitor resonance warning module and parallel resonance assistant analysis module judges whether to occur resonance and resonant type,, if meet parallel resonance condition and parallel resonance assistant analysis condition, send out parallel resonance early warning signal simultaneously; Meet series resonance condition and directly send out series resonance early warning signal; The most close which integral frequency harmonizing wave of tuningpoints calculating is this subharmonic resonance.
Priority Applications (1)
Application Number  Priority Date  Filing Date  Title 

CN201410097179.7A CN103823144B (en)  20140314  20140314  Highvoltage shunt power capacitor operational monitoring system and method 
Applications Claiming Priority (1)
Application Number  Priority Date  Filing Date  Title 

CN201410097179.7A CN103823144B (en)  20140314  20140314  Highvoltage shunt power capacitor operational monitoring system and method 
Publications (2)
Publication Number  Publication Date 

CN103823144A true CN103823144A (en)  20140528 
CN103823144B CN103823144B (en)  20170517 
Family
ID=50758301
Family Applications (1)
Application Number  Title  Priority Date  Filing Date 

CN201410097179.7A Active CN103823144B (en)  20140314  20140314  Highvoltage shunt power capacitor operational monitoring system and method 
Country Status (1)
Country  Link 

CN (1)  CN103823144B (en) 
Cited By (13)
Publication number  Priority date  Publication date  Assignee  Title 

CN104007321A (en) *  20140617  20140827  华北电力大学（保定）  Method for online identification of parameters of reactive compensation capacitor bank 
CN105467195A (en) *  20160130  20160406  山东汇能电气有限公司  Comprehensive measuring device for operation voltage of buses and capacitors of transformer substation and measuring method of comprehensive measuring device 
CN105548781A (en) *  20160215  20160504  新疆金风科技股份有限公司  Bus shortcircuit capacity testing method, device and system 
CN105911403A (en) *  20160706  20160831  贵州电网有限责任公司电力科学研究院  Electric power quality detection system of power electronic transformer 
CN106526280A (en) *  20160825  20170322  北京电力经济技术研究院  Testing method and separating method for railway power load impact transient process 
CN106841883A (en) *  20170413  20170613  山东汇能电气有限公司  Reactor method for monitoring operation states in highvoltage power capacitor complexes 
CN106872833A (en) *  20170413  20170620  山东汇能电气有限公司  Highvoltage parallel capacitor complete set of equipments method for evaluating state based on power detection 
CN107478911A (en) *  20170905  20171215  国网河南省电力公司检修公司  A kind of method and system based on harmonic measure highvoltage capacitor capacitance 
CN108445300A (en) *  20180321  20180824  广东电网有限责任公司电力科学研究院  A kind of method and apparatus for measuring transformer running parameter 
CN108710040A (en) *  20180528  20181026  国网河北省电力有限公司衡水供电分公司  Shunt capacitor is protected and monitoring integration method 
CN109738706A (en) *  20181229  20190510  浙江南德电气有限公司  A kind of capacitor capacitance decaying detection method 
CN109738705A (en) *  20181229  20190510  浙江南德电气有限公司  A kind of capacitor capacitance decaying detection method 
CN111127802A (en) *  20191203  20200508  安徽北斗易通信息技术有限公司  Power distribution electrical fire early warning method and device based on series resonance mechanism 
Citations (4)
Publication number  Priority date  Publication date  Assignee  Title 

CN102830310A (en) *  20120827  20121219  云南电力试验研究院（集团）有限公司电力研究院  Method for estimating residual life of power capacitor based on operating data 
CN102928693A (en) *  20121016  20130213  云南电力试验研究院（集团）有限公司电力研究院  Monitoring system and monitoring method for switching process of shunt power capacitor 
CN103323672A (en) *  20130527  20130925  云南电力试验研究院（集团）有限公司电力研究院  Online resonant early warning device and method for parallelconnection power capacitor 
TW201350870A (en) *  20120614  20131216  Univ Chienkuo Technology  Power quality analyzer system 

2014
 20140314 CN CN201410097179.7A patent/CN103823144B/en active Active
Patent Citations (4)
Publication number  Priority date  Publication date  Assignee  Title 

TW201350870A (en) *  20120614  20131216  Univ Chienkuo Technology  Power quality analyzer system 
CN102830310A (en) *  20120827  20121219  云南电力试验研究院（集团）有限公司电力研究院  Method for estimating residual life of power capacitor based on operating data 
CN102928693A (en) *  20121016  20130213  云南电力试验研究院（集团）有限公司电力研究院  Monitoring system and monitoring method for switching process of shunt power capacitor 
CN103323672A (en) *  20130527  20130925  云南电力试验研究院（集团）有限公司电力研究院  Online resonant early warning device and method for parallelconnection power capacitor 
NonPatent Citations (2)
Title 

张凯等: "抑制10 kV 电容器组投切操作过电压及涌流的新方法", 《电子技术应用》 * 
郭成等: "并联电容器谐振的动态特性研究", 《云南电力技术》 * 
Cited By (16)
Publication number  Priority date  Publication date  Assignee  Title 

CN104007321A (en) *  20140617  20140827  华北电力大学（保定）  Method for online identification of parameters of reactive compensation capacitor bank 
CN104007321B (en) *  20140617  20160608  华北电力大学（保定）  A kind of online parameter identification method of compensation capacitors 
CN105467195A (en) *  20160130  20160406  山东汇能电气有限公司  Comprehensive measuring device for operation voltage of buses and capacitors of transformer substation and measuring method of comprehensive measuring device 
CN105548781A (en) *  20160215  20160504  新疆金风科技股份有限公司  Bus shortcircuit capacity testing method, device and system 
CN105911403A (en) *  20160706  20160831  贵州电网有限责任公司电力科学研究院  Electric power quality detection system of power electronic transformer 
CN106526280A (en) *  20160825  20170322  北京电力经济技术研究院  Testing method and separating method for railway power load impact transient process 
CN106841883A (en) *  20170413  20170613  山东汇能电气有限公司  Reactor method for monitoring operation states in highvoltage power capacitor complexes 
CN106872833A (en) *  20170413  20170620  山东汇能电气有限公司  Highvoltage parallel capacitor complete set of equipments method for evaluating state based on power detection 
CN107478911B (en) *  20170905  20200811  国网河南省电力公司检修公司  Method and system for measuring capacitance value of highvoltage capacitor based on harmonic waves 
CN107478911A (en) *  20170905  20171215  国网河南省电力公司检修公司  A kind of method and system based on harmonic measure highvoltage capacitor capacitance 
CN108445300A (en) *  20180321  20180824  广东电网有限责任公司电力科学研究院  A kind of method and apparatus for measuring transformer running parameter 
CN108710040A (en) *  20180528  20181026  国网河北省电力有限公司衡水供电分公司  Shunt capacitor is protected and monitoring integration method 
CN109738706A (en) *  20181229  20190510  浙江南德电气有限公司  A kind of capacitor capacitance decaying detection method 
CN109738705A (en) *  20181229  20190510  浙江南德电气有限公司  A kind of capacitor capacitance decaying detection method 
CN109738705B (en) *  20181229  20210406  浙江南德电气有限公司  Capacitor capacitance attenuation detection method 
CN111127802A (en) *  20191203  20200508  安徽北斗易通信息技术有限公司  Power distribution electrical fire early warning method and device based on series resonance mechanism 
Also Published As
Publication number  Publication date 

CN103823144B (en)  20170517 
Similar Documents
Publication  Publication Date  Title 

CN103036238B (en)  Control structure and method of chaintype active power filter (FAPF) linkage unit bypass  
CN103490511B (en)  A kind of power distribution network communication terminal detection system and method  
CA2736459C (en)  Apparatus and method for adaptive fault detection in mv distribution circuits  
CN103116107B (en)  A kind of highvoltage DC power supply insulating monitor  
CN102170124B (en)  Early warning method of stablestate index of power quality  
CN104995812A (en)  A method of operating a wind turbine plant  
CN101938130B (en)  High voltage filter and dynamic reactive power compensation control system combining PPF with TSC and control method thereof  
WO2015176687A1 (en)  Integrated high and low voltage ride through test system  
CN102621457B (en)  Online detection method of metal oxide arrester insulating property influencing factor  
CN101895155B (en)  Energy storage device with failure detection and automatic reconstruction function and reconstructing method  
CN103454517B (en)  Capacitance type potential transformer online monitoring method  
CN101777755A (en)  Highvoltage capacitor imbalance protecting method for highvoltage DC transmission system  
CN203690938U (en)  Lowvoltage reactivepower automatic compensation device  
CN103412217A (en)  Boxtype substation intelligent online failure diagnosis system  
CN103605015A (en)  Device and method for highprecision electric parameter measurement drytype reactor online monitoring  
CN102982230B (en)  A kind of short circuit current based on node impedance sensitivity exceeds standard aid decisionmaking method  
CN102121966B (en)  Measuring method and analytical system for lowvoltage ride through capability of wind driven generator  
CN103217579B (en)  Transformer Winding online monitoring system  
CN203691057U (en)  Arc online monitoring and protecting system  
CN102497021A (en)  Realtime monitoring and analysis system for distribution circuit  
CN201637791U (en)  Online monitoring system for highvoltage shunt capacitor  
CN201984120U (en)  Electrical energy quality monitoring system  
CN1560645A (en)  Small Current earthing line selecting method based on model parametric recognition  
CN1320718C (en)  Serial electric energy quality controller  
CN103499753B (en)  Intelligent system for rapidly identifying transient fault of highvoltage directcurrent power transmission 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  
GR01  Patent grant  
GR01  Patent grant 