CN103823144A - High-voltage shunt power capacitor operational monitoring system and method - Google Patents

High-voltage shunt power capacitor operational monitoring system and method Download PDF

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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
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capacitor
resonance
value
current
voltage
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CN201410097179.7A
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CN103823144B (en
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郭成
阴艳超
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云南电力试验研究院(集团)有限公司电力研究院
云南电网公司技术分公司
昆明理工大学
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Abstract

The invention discloses a high-voltage 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

A kind of high-voltage bridging capacitor operation monitoring system and method
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
High-voltage parallel capacitor is electrical equipment common in electric system, drops into shnt capacitor, can bucking-out system reactive power, improve busbar voltage and power factor; Otherwise excision shnt capacitor, can reduce busbar voltage and power factor.
It is high that high-voltage parallel capacitor has failure rate, is difficult for finding the feature of failure cause, therefore carries out the operational monitoring of high-voltage 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 high-voltage 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 high-voltage 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 low-voltage bus bar PT of 3 minutes cycle continuous acquisition step down side CT1; (2) by voltage waveform and the current waveform in jump-value 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 2-13 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 2-13 subharmonic voltage of the steady-state current/voltage before and after capacitor switching, the 2-13 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 anti-rate, 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 on-line 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 steady-state 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 drepresent the busbar short-circuit capacity of parallel capacitor device installation place; N represents overtone order; K---reactance Rate.
The computing formula of parallel resonant point is:
X in formula cfor the capacitor value of capacitor group; X lfor 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) cT1harmonic current I with CT2 place cT2there is the amplified harmonic current of homogeneous simultaneously; (2) U/I cT1with U/I cT2the 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 tuning-points 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 on-line 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 high-voltage 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 high-voltage 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 low-voltage bus bar PT of 3 minutes cycle continuous acquisition step down side CT1; (2) by voltage waveform and the current waveform in jump-value 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 2-13 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 2-13 subharmonic voltage of the steady-state current/voltage before and after capacitor switching, the 2-13 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 anti-rate, 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 on-line 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 steady-state 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 drepresent the busbar short-circuit capacity of parallel capacitor device installation place; N represents overtone order; K---reactance Rate.
The computing formula of parallel resonant point is:
X in formula cfor the capacitor value of capacitor group; X lfor 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) cT1harmonic current I with CT2 place cT2there is the amplified harmonic current of homogeneous simultaneously; (2) U/I cT1with U/I cT2the 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 tuning-points 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 2-13 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 2-13 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 steady-state 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, steady-state 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) cT1harmonic current I with CT2 place cT2there is the amplified harmonic current of homogeneous simultaneously; (2) U/I cT1with U/I cT2the 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 high-voltage 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 high-voltage 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 low-voltage bus bar PT of 3 minutes cycle continuous acquisition step down side CT1; (2) by voltage waveform and the current waveform in jump-value 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 2-13 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 2-13 subharmonic voltage of the steady-state current/voltage before and after capacitor switching, the 2-13 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 anti-rate, 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 on-line 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 steady-state 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 drepresent the busbar short-circuit capacity of parallel capacitor device installation place; N represents overtone order; K---reactance Rate;
The computing formula of parallel resonant point is:
X in formula cfor the capacitor value of capacitor group; X lfor 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) cT1harmonic current I with CT2 place cT2there is the amplified harmonic current of homogeneous simultaneously; (2) U/I cT1with U/I cT2the 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 tuning-points calculating is this subharmonic resonance.
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Cited By (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104007321A (en) * 2014-06-17 2014-08-27 华北电力大学(保定) Method for online identification of parameters of reactive compensation capacitor bank
CN105467195A (en) * 2016-01-30 2016-04-06 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) * 2016-02-15 2016-05-04 新疆金风科技股份有限公司 Bus short-circuit capacity testing method, device and system
CN105911403A (en) * 2016-07-06 2016-08-31 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) * 2016-08-25 2017-03-22 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) * 2017-04-13 2017-06-13 山东汇能电气有限公司 Reactor method for monitoring operation states in high-voltage power capacitor complexes
CN106872833A (en) * 2017-04-13 2017-06-20 山东汇能电气有限公司 High-voltage parallel capacitor complete set of equipments method for evaluating state based on power detection
CN107478911A (en) * 2017-09-05 2017-12-15 国网河南省电力公司检修公司 A kind of method and system based on harmonic measure high-voltage capacitor capacitance
CN108445300A (en) * 2018-03-21 2018-08-24 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) * 2018-05-28 2018-10-26 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) * 2018-12-29 2019-05-10 浙江南德电气有限公司 A kind of capacitor capacitance decaying detection method
CN109738705A (en) * 2018-12-29 2019-05-10 浙江南德电气有限公司 A kind of capacitor capacitance decaying detection method
CN111127802A (en) * 2019-12-03 2020-05-08 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)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102830310A (en) * 2012-08-27 2012-12-19 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) * 2012-10-16 2013-02-13 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) * 2013-05-27 2013-09-25 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 parallel-connection power capacitor
TW201350870A (en) * 2012-06-14 2013-12-16 Univ Chienkuo Technology Power quality analyzer system

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
TW201350870A (en) * 2012-06-14 2013-12-16 Univ Chienkuo Technology Power quality analyzer system
CN102830310A (en) * 2012-08-27 2012-12-19 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) * 2012-10-16 2013-02-13 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) * 2013-05-27 2013-09-25 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 parallel-connection power capacitor

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
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)

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Publication number Priority date Publication date Assignee Title
CN104007321A (en) * 2014-06-17 2014-08-27 华北电力大学(保定) Method for online identification of parameters of reactive compensation capacitor bank
CN104007321B (en) * 2014-06-17 2016-06-08 华北电力大学(保定) A kind of on-line parameter identification method of compensation capacitors
CN105467195A (en) * 2016-01-30 2016-04-06 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) * 2016-02-15 2016-05-04 新疆金风科技股份有限公司 Bus short-circuit capacity testing method, device and system
CN105911403A (en) * 2016-07-06 2016-08-31 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) * 2016-08-25 2017-03-22 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) * 2017-04-13 2017-06-13 山东汇能电气有限公司 Reactor method for monitoring operation states in high-voltage power capacitor complexes
CN106872833A (en) * 2017-04-13 2017-06-20 山东汇能电气有限公司 High-voltage parallel capacitor complete set of equipments method for evaluating state based on power detection
CN107478911B (en) * 2017-09-05 2020-08-11 国网河南省电力公司检修公司 Method and system for measuring capacitance value of high-voltage capacitor based on harmonic waves
CN107478911A (en) * 2017-09-05 2017-12-15 国网河南省电力公司检修公司 A kind of method and system based on harmonic measure high-voltage capacitor capacitance
CN108445300A (en) * 2018-03-21 2018-08-24 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) * 2018-05-28 2018-10-26 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) * 2018-12-29 2019-05-10 浙江南德电气有限公司 A kind of capacitor capacitance decaying detection method
CN109738705A (en) * 2018-12-29 2019-05-10 浙江南德电气有限公司 A kind of capacitor capacitance decaying detection method
CN109738705B (en) * 2018-12-29 2021-04-06 浙江南德电气有限公司 Capacitor capacitance attenuation detection method
CN111127802A (en) * 2019-12-03 2020-05-08 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

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