CN106990304A - Power capacitor running status on-line monitoring method based on capacitance - Google Patents
Power capacitor running status on-line monitoring method based on capacitance Download PDFInfo
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- CN106990304A CN106990304A CN201710240043.0A CN201710240043A CN106990304A CN 106990304 A CN106990304 A CN 106990304A CN 201710240043 A CN201710240043 A CN 201710240043A CN 106990304 A CN106990304 A CN 106990304A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R27/00—Arrangements for measuring resistance, reactance, impedance, or electric characteristics derived therefrom
- G01R27/02—Measuring real or complex resistance, reactance, impedance, or other two-pole characteristics derived therefrom, e.g. time constant
- G01R27/26—Measuring inductance or capacitance; Measuring quality factor, e.g. by using the resonance method; Measuring loss factor; Measuring dielectric constants ; Measuring impedance or related variables
- G01R27/2605—Measuring capacitance
Abstract
Power capacitor running status on-line monitoring method based on capacitance, belongs to substation equipment on-line monitoring technique field.Including parameter measurement unit and step：Step 1001, start；Step 1002, bus voltage signal is obtained；Step 1003, power capacitor working voltage is obtained；Step 1004 ~ 1005, obtain and decompose current signal I；Step 1006 ~ 1008, obtain dielectric dissipation factor, power parameter and capacitance.Step 1009, step 1010 is performed in severe conditions, is not at performing step 1011；Step 1010, trip command is sent；Step 1011, step 1012 is performed in abnormality, is not at performing step 1013；Step 1012, alarm；Step 1013, continue to run with.Monitoring to the working condition of power capacitor is realized by the real-time monitoring of the capacitance to power capacitor, it is ensured that the trouble free service of power capacitor and high-voltage power capacitor complexes.
Description
Technical field
Power capacitor running status on-line monitoring method based on capacitance, belongs to substation equipment on-line monitoring technique
Field.
Background technology
High-voltage power capacitor complexes are power systems using most traditional, the most extensive and most reactive-load compensation of quantity
Equipment, mostly nearly 1,000,000,000 kilovars of the reactive-load compensation equipment capacity of China, parallel capacitor complete equipment, is being conducive to electricity
Force system safe and stable operation, can improve the quality of power supply, the biography of reduction electric energy loss, increase transmission line and power transformer
Fine effect has been played in terms of defeated capacity.The availability of capacitance reactive compensation equipment one as power production management is important
Technical indicator.
Reactive power compensator individually arranges installation in transformer station, is typically connected in parallel on transformer station's low pressure by special switch device
On bus, according to the power factor of power transformer or busbar voltage height determine whether input, due to its whether put into it is not straight
Connect and cause user to have a power failure, and influence power supply can reliability, generally existing to power capacitor safe and reliable operation attention degree not
Enough the problem of, there is many administrative vulnerabilities from installation, operation, detection, defect elimination, maintenance etc., operation actually shows：Capacitor accident
First of Shuai Ju transformer stations all devices, many power capacitor complexes perform practically no function, due to a variety of causes even throughout the year not
It can put into operation, its effect fails to be played, have impact on systematic economy operation and quality of voltage.
Capacitance is an important indicator for indicating power capacitor medium basic performance and state, can reflect manufacture work
The quality and the state and level of safe operation of skill and raw material, wherein being embodied in：（1）There is leakage of oil in capacitor,
Moisture moisture in air enters capacitor internal, capacity cell insulation reduction, oil level decline, or even makes capacitor lead wire or member
Part upper end spills pasta, causes, extremely to shell electric discharge or component breakdown, to damage capacitor.（2）The active loss of capacitor and fortune
Row voltage is directly proportional, and working voltage rise causes caloric value to dramatically increase, and insulation ag(e)ing is accelerated, or even causes thermal breakdown to damage electricity
Container.Capacitor overcurrent is run in the presence of overvoltage or harmonic wave, is equally caused element heating and is damaged capacitor.（3）
Power capacitor is because of high field intensity, the service condition of high-temperature, and power capacitor insulation ag(e)ing acceleration, Dielectric Disruptive Discharge are caused
Thermal breakdown.（4）There is insulation defect, inside has partial discharge phenomenon, damages element and causes electric capacitance change, is likely to result in electric capacity
Quantitative change is big, illustrates that the capacity cell of internal series-connection section is reduced, causes other inner member overvoltage to run.（5）In capacitor bank
Lacking platform operation, the improper fusing of single capacitor fuse can also cause the apparent capacity amount of capacitor bank to change.
From the foregoing, it is most important by monitoring judgement of the change of power capacitor capacitance to its running status,
In the prior art, also without can be online to power capacitor the method that effectively monitors of capacitance, therefore be difficult by electricity
Capacity is evaluated the working condition of power capacitor, so it is difficult to obtaining work shape of the power capacitor in real work
State, therefore form larger potential safety hazard.
The content of the invention
The technical problem to be solved in the present invention is：The deficiencies in the prior art are overcome to pass through there is provided one kind to power capacitor
The real-time monitoring of capacitance realize the monitoring to the working condition of power capacitor, it is ensured that power capacitor and high pressure
The power capacitor running status on-line monitoring method based on capacitance of power capacitor complexes trouble free service.
The technical solution adopted for the present invention to solve the technical problems is：The power capacitor operation shape based on capacitance
State on-line monitoring method, it is characterised in that：It is provided with the current parameters and voltage parameter to high-voltage power capacitor complete set of equipments
The parameter measurement unit for measuring and handling, also comprises the following steps：
Step 1001, start to evaluate high-voltage parallel capacitor complete set of equipments state；
Step 1002, substation bus bar mutual induction of voltage where obtaining high-voltage parallel capacitor complete set of equipments by parameter measurement unit
The secondary side voltage signal U of device；
Step 1003, the operation for obtaining power capacitor in high-voltage parallel capacitor complete set of equipments is calculated by parameter measurement unit
Voltage Uc；
Step 1004, high-voltage parallel capacitor complexes outlet switch cabinet current transformer two is obtained by parameter measurement unit
The current signal I of secondary side；
Step 1005, the current signal I of high-voltage parallel capacitor complete set of equipments is decomposed；
Parameter measurement unit carries out Fourier transformation to the current signal I of high-voltage parallel capacitor complete set of equipments and obtains wherein resistive
Current component Ir and capacitive current component Ic；
Step 1006, parameter measurement unit calculates the power parameter for obtaining power capacitor；
Step 1007, parameter measurement unit calculates the dielectric dissipation factor for obtaining power capacitor；
Step 1008, parameter measurement unit calculates the capacitance for obtaining power capacitor；
Step 1009, parameter measurement unit judges whether power capacitor is located according to the severe conditions judgment rule of power capacitor
In severe conditions, if in severe conditions, performing step 1010, if being not in severe conditions, step 1011 is performed；
Step 1010, power capacitor is in severe conditions, and parameter measurement unit sends tripping operation to the breaker of outlet switch cabinet
Instruction；
Step 1011, parameter measurement unit judges whether power capacitor is located according to the abnormality judgment rule of power capacitor
In abnormality, if in abnormality, performing step 1012, if being not in abnormality, step 1013 is performed；
Step 1012, parameter measurement unit is alarmed the state of reactor；
Step 1013, power capacitor is in normal operating conditions, and high-voltage power capacitor complexes are continued to run with.
It is preferred that, the severe conditions judgment rule described in step 1009 is：Parameter measurement unit falls into a trap step 1008
The rated value of obtained capacitance and power capacitor capacitance is compared and obtains its deviation ratio, if deviation ratio is more than
10% is in severe conditions.
It is preferred that, the abnormality judgment rule described in step 1011 is：Parameter measurement unit falls into a trap step 1008
The rated value of obtained capacitance and power capacitor capacitance is compared and obtains its deviation ratio, if deviation ratio is 5%
~ 10%, then in abnormality.
It is preferred that, the power parameter described in step 1006 includes：Consumed in high-voltage parallel capacitor complete set of equipments loop
Active power value, high-voltage parallel capacitor complete set of equipments loop output reactive power and high-voltage parallel capacitor complete set of equipments
The active power of middle power capacitor consumption.
It is preferred that, described parameter measurement unit, including current acquisition module, voltage acquisition module, signal processing module,
The output end of logic analysis module and sound and light alarm module, current acquisition module and voltage acquisition module is while and signal transacting
The input of module is connected, and the output end of signal processing module is connected with the input of logic analysis module, logic analysis module
Output end connection sound and light alarm module.
It is preferred that, described voltage acquisition module connection is arranged on high-voltage parallel capacitor complete set of equipments substation bus bar
The secondary side of voltage transformer.
It is preferred that, the electric current of described current acquisition module connection high-voltage parallel capacitor complexes outlet switch cabinet is mutual
The secondary side of sensor.
Compared with prior art, the present invention is had an advantageous effect in that：
In this power capacitor running status on-line monitoring method based on capacitance, by power capacitor capacitance
Calculating in real time realizes the monitoring to power capacitor and high-voltage power capacitor complexes working condition, it is ensured that electric power
The trouble free service of capacitor and high-voltage power capacitor complexes.
This power capacitor running status on-line monitoring method based on capacitance is in power capacitor actual motion work
Measured under condition, in the case where not increasing any primary equipment, realize and the capacitance of power capacitor is detected in real time, Neng Gouzhen
Reflect its state of insulation in fact, the medium wasting factor tgδ of three-phase high-voltage capacitor, measurement results reliability can be monitored simultaneously online
It is higher with comparability, and not detectable insulation defect under some low-voltages can be found.Go out in high-voltage power capacitor
Alarm is sent during existing insulation fault immediately, that reminds operation maintenance personnel carries out follow-up inspection or replacing to capacitor.
Alarm signal is sent when capacitance tolerance is excessive immediately, or tripping operation is sent to the lead-in circuit breaker of its switch cubicle and is referred to
Order, extractor operation, prevents the insulation damages accident of power capacitor.And the communication interface by standard and transformer station
Complex automatic system is mutually got in touch with, and is facilitated the safety running control of Reactive Power Compensation Eqyuipment in Substation, is improved power capacitor
The intelligent level of group.
Brief description of the drawings
Fig. 1 is the power capacitor running status on-line monitoring method flow chart based on capacitance.
Fig. 2 is the power capacitor running status on-line monitoring method parameter measurement unit principle square frame based on capacitance
Figure.
Embodiment
Fig. 1 ~ 2 are highly preferred embodiment of the present invention, and 1 ~ 2 the present invention will be further described below in conjunction with the accompanying drawings.
As shown in figure 1, the power capacitor running status on-line monitoring method based on capacitance, comprises the following steps：
Step 1001, start；
Proceed by power capacitor method for monitoring operation states in high-voltage power capacitor complexes；
Step 1002, measurement obtains the voltage signal of substation bus bar；
In this high-voltage power capacitor complexes in power capacitor method for monitoring operation states, it is provided with to high-voltage parallel
The parameter measurement unit that the operational factor of capacitor set equipment is measured and handled.As shown in Fig. 2 parameter measurement unit bag
Include：Current acquisition module, voltage acquisition module, signal processing module, logic analysis module and sound and light alarm module.Electric current is adopted
Collection module and the output end of voltage acquisition module are connected with the input of signal processing module simultaneously, the output of signal processing module
End is connected with the input of logic analysis module, the output end connection sound and light alarm module of logic analysis module.
Voltage acquisition module connection is arranged on the voltage transformer of high-voltage parallel capacitor complete set of equipments substation bus bar
Secondary side, the secondary side of the current transformer of current acquisition module connection high-voltage parallel capacitor complexes outlet switch cabinet,
It is respectively used to gather voltage signal and the operation of high-voltage parallel capacitor complexes of substation bus bar voltage transformer secondary side
Current signal in loop.The parameter that signal processing module is used to collect current acquisition module and voltage acquisition module is carried out
Handle and send into logic analysis module, the current signal that logic analysis module sends into voltage acquisition module and current acquisition module
Further computing is carried out with voltage signal, if necessary to be alarmed, then logic analysis module driving sound and light alarm module is carried out
Sound and light alarm.
In this step, substation bus bar electricity where obtaining high-voltage parallel capacitor complete set of equipments by voltage acquisition unit
The secondary side of transformer is pressed to obtain voltage signal U.
Step 1003, the working voltage signal for obtaining power capacitor is calculated；
Logic analysis module is according to formula：Uc=U/（1 ﹣ β）Calculating obtains power capacitor in high-voltage parallel capacitor complete set of equipments
Working voltage Uc, wherein U is substation bus bar voltage where obtained high-voltage parallel capacitor complete set of equipments in step 1002
The voltage signal of transformer secondary side, β is the reactance Rate of high-voltage parallel capacitor complexes.
Step 1004, the current signal I of high-voltage parallel capacitor complete set of equipments is obtained；
The electricity of high-voltage parallel capacitor complexes outlet switch cabinet Current Transformer Secondary side is obtained by current acquisition module
Flow signal I.
Step 1005, the current signal I of high-voltage parallel capacitor complete set of equipments is decomposed；
Logic analysis module carries out Fourier transformation to the current signal I of high-voltage parallel capacitor complete set of equipments and obtains wherein resistive
Current component Ir and capacitive current component Ic.
Step 1006, the power parameter for obtaining power capacitor is calculated；
Logic analysis unit calculates the following power parameter for obtaining high-voltage parallel capacitor complete set of equipments：
（1）According to formula：P=IrU calculates the active power value for obtaining consuming in high-voltage parallel capacitor complete set of equipments loop,
Wherein U is the voltage signal of substation bus bar voltage transformer secondary side where high-voltage parallel capacitor complete set of equipments, and Ir is electricity
Stream acquisition module is obtained in the current signal I of high-voltage parallel capacitor complexes outlet switch cabinet Current Transformer Secondary side
Resistive current component.
（2）The reactive power Q for obtaining the output of high-voltage parallel capacitor complete set of equipments loop is calculated according to formula Q=IcU,
Wherein U is the voltage signal of substation bus bar voltage transformer secondary side where high-voltage parallel capacitor complete set of equipments, Ic electric currents
Acquisition module obtains the appearance in the current signal I of high-voltage parallel capacitor complexes outlet switch cabinet Current Transformer Secondary side
Property current component.
（3）According to having that formula Pc=IrUc calculates that power capacitor in high-voltage parallel capacitor complete set of equipments consumes
Work(power P c, wherein Uc are the working voltage of power capacitor in high-voltage parallel capacitor complete set of equipments, Ir current acquisition modules
Obtain the current in resistance property point in the current signal I of high-voltage parallel capacitor complexes outlet switch cabinet Current Transformer Secondary side
Amount.
Step 1007, the dielectric dissipation factor for obtaining power capacitor is calculated；
Logic analysis module is according to formula：Tg δ=P/Q, calculate the medium wasting factor tgδ of power capacitor, and wherein P is high pressure
The active power value consumed in shunt capacitor complete set of equipments loop；Q is what high-voltage parallel capacitor complete set of equipments loop was exported
Reactive power.
Step 1008, the capacitance for obtaining power capacitor is calculated；
Logic analysis module is according to formula：P=ω·C·Uc2Tg δ obtain the capacitance of power capacitor：C=P/(ω·
Uc2Tg δ), wherein：P is the active power value that consumes in high-voltage parallel capacitor complete set of equipments loop；Wherein Uc be high pressure simultaneously
Join the working voltage of power capacitor in capacitor set equipment；Tg δ are the dielectric dissipation factor of power capacitor；ω is angular frequency
Rate.
Step 1009, logic analysis module judges whether power capacitor belongs to severe conditions；
The capacitance for the power capacitor that logic analysis module is obtained according to the calculating in step 1008 is specified with its capacitance
Value is compared and draws its rate of change, if whether rate of change is more than 10%, power capacitor is in severe conditions, performs
Step 1010, if deviation is less than or equal to 10%, step 1011 is performed.
Step 1010, trip command is sent：
Logic analysis unit judges power capacitor is in abnormality, and logic analysis unit is sent out to the breaker of outlet switch cabinet
Go out trip command.
Step 1011, logic analysis module judges whether the dielectric dissipation factor of power capacitor is in abnormality；
The capacitance for the power capacitor that logic analysis module is obtained according to the calculating in step 1008 is specified with its capacitance
Value is compared and draws its rate of change, if rate of change is 5% ~ 10%, power capacitor is in abnormality, performs step
1012, if not less than setting, performing step 1013.
Step 1012, step sound and light alarm；
The dielectric dissipation factor of power capacitor exceedes setting, and logic analysis module driving sound and light alarm module carries out acousto-optic report
It is alert.
Step 1013, continue to run with：
Power capacitor is in normal operating conditions, and logic analysis unit does not perform other operations, and high-voltage power capacitor is complete
Device is continued to run with.
Specific work process and operation principle are as follows：
Utilizing work of the power capacitor method for monitoring operation states in high-voltage power capacitor complexes to power capacitor
When being monitored as state, high-voltage parallel capacitor is obtained into being arranged by voltage acquisition module in parameter acquisition unit first
The secondary side of standby place substation bus bar voltage transformer obtains voltage signal U, while obtaining high pressure by current acquisition module
Signal in the current signal I of parallel capacitor complete equipment outlet switch cabinet Current Transformer Secondary side, parameter acquisition unit
The parameter that current acquisition module and voltage acquisition module are collected is handled and sends into logic analysis module by processing module, by
The current signal and voltage signal that logic analysis module sends into voltage acquisition module and current acquisition module are further transported
Calculate.
Logic analysis module carries out Fourier transformation to current signal I and obtains resistive current component Ir therein and capacitive electricity
Flow component Ic, calculates active power value, the high-voltage parallel capacitor for obtaining consuming in high-voltage parallel capacitor complete set of equipments loop
The reactive power Q of complete set of equipments loop output and the active-power P c of power capacitor consumption, then further calculate and obtain
The dielectric dissipation factor of power capacitor and the capacitance of power capacitor.
The rated value for calculating obtained capacitance and power capacitor capacitance is compared and asked by logic analysis module
Deviate rate, if deviation ratio is more than 10%, logic analysis unit judges power capacitor is in severe conditions, logic analysis
The breaker of unit to outlet switch cabinet sends trip command；If deviation ratio is 5% ~ 10%, power capacitor is in abnormal
State, logic analysis module driving sound and light alarm module carries out sound and light alarm, if the deviation of the capacitance of power capacitor
Less than 5%, then power capacitor working condition is normal, and high-voltage parallel capacitor complete set of equipments continues to run with current state.
The above described is only a preferred embodiment of the present invention, being not the limitation for making other forms to the present invention, appoint
What those skilled in the art changed or be modified as possibly also with the technology contents of the disclosure above equivalent variations etc.
Imitate embodiment.But it is every without departing from technical solution of the present invention content, the technical spirit according to the present invention is to above example institute
Any simple modification, equivalent variations and the remodeling made, still fall within the protection domain of technical solution of the present invention.
Claims (7)
1. the power capacitor running status on-line monitoring method based on capacitance, it is characterised in that：It is provided with to high-tension electricity
The parameter measurement unit that the current parameters and voltage parameter of capacitor set equipment are measured and handled, in addition to following step
Suddenly：
Step 1001, start to evaluate high-voltage parallel capacitor complete set of equipments state；
Step 1002, substation bus bar mutual induction of voltage where obtaining high-voltage parallel capacitor complete set of equipments by parameter measurement unit
The secondary side voltage signal U of device；
Step 1003, the operation for obtaining power capacitor in high-voltage parallel capacitor complete set of equipments is calculated by parameter measurement unit
Voltage Uc；
Step 1004, high-voltage parallel capacitor complexes outlet switch cabinet current transformer two is obtained by parameter measurement unit
The current signal I of secondary side；
Step 1005, the current signal I of high-voltage parallel capacitor complete set of equipments is decomposed；
Parameter measurement unit carries out Fourier transformation to the current signal I of high-voltage parallel capacitor complete set of equipments and obtains wherein resistive
Current component Ir and capacitive current component Ic；
Step 1006, parameter measurement unit calculates the power parameter for obtaining power capacitor；
Step 1007, parameter measurement unit calculates the dielectric dissipation factor for obtaining power capacitor；
Step 1008, parameter measurement unit calculates the capacitance for obtaining power capacitor；
Step 1009, parameter measurement unit judges whether power capacitor is located according to the severe conditions judgment rule of power capacitor
In severe conditions, if in severe conditions, performing step 1010, if being not in severe conditions, step 1011 is performed；
Step 1010, power capacitor is in severe conditions, and parameter measurement unit sends tripping operation to the breaker of outlet switch cabinet
Instruction；
Step 1011, parameter measurement unit judges whether power capacitor is located according to the abnormality judgment rule of power capacitor
In abnormality, if in abnormality, performing step 1012, if being not in abnormality, step 1013 is performed；
Step 1012, parameter measurement unit is alarmed the state of reactor；
Step 1013, power capacitor is in normal operating conditions, and high-voltage power capacitor complexes are continued to run with.
2. the power capacitor running status on-line monitoring method according to claim 1 based on capacitance, its feature exists
In：Severe conditions judgment rule described in step 1009 is：Parameter measurement unit will calculate obtained electric capacity in step 1008
The rated value of amount and power capacitor capacitance is compared and obtains its deviation ratio, in tight if deviation ratio is more than 10%
Weight state.
3. the power capacitor running status on-line monitoring method according to claim 1 based on capacitance, its feature exists
In：Abnormality judgment rule described in step 1011 is：Parameter measurement unit will calculate obtained electric capacity in step 1008
The rated value of amount and power capacitor capacitance is compared and obtains its deviation ratio, if deviation ratio is 5% ~ 10%, is in
Abnormality.
4. the power capacitor running status on-line monitoring method according to claim 1 based on capacitance, its feature exists
In：Power parameter described in step 1006 includes：The active power value consumed in high-voltage parallel capacitor complete set of equipments loop,
Power capacitor in the reactive power and high-voltage parallel capacitor complete set of equipments of the output of high-voltage parallel capacitor complete set of equipments loop
The active power of consumption.
5. the power capacitor running status on-line monitoring method according to claim 1 based on capacitance, its feature exists
In：Described parameter measurement unit, including current acquisition module, voltage acquisition module, signal processing module, logic analysis module
And sound and light alarm module, the input of the output end of current acquisition module and voltage acquisition module simultaneously with signal processing module
It is connected, the output end of signal processing module is connected with the input of logic analysis module, the output end connection of logic analysis module
Sound and light alarm module.
6. the power capacitor running status on-line monitoring method according to claim 5 based on capacitance, its feature exists
In：Described voltage acquisition module connection is arranged on the voltage transformer of high-voltage parallel capacitor complete set of equipments substation bus bar
Secondary side.
7. the power capacitor running status on-line monitoring method according to claim 5 based on capacitance, its feature exists
In：Described current acquisition module connects the secondary of the current transformer of high-voltage parallel capacitor complexes outlet switch cabinet
Side.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201710240043.0A CN106990304A (en) | 2017-04-13 | 2017-04-13 | Power capacitor running status on-line monitoring method based on capacitance |
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| CN201710240043.0A CN106990304A (en) | 2017-04-13 | 2017-04-13 | Power capacitor running status on-line monitoring method based on capacitance |
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Cited By (9)
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| CN107884645A (en) * | 2017-11-03 | 2018-04-06 | 山东理工大学 | Based on voltage ratio compared with power capacitor method for monitoring operation states |
| CN110208606A (en) * | 2019-06-03 | 2019-09-06 | 河北旭辉电气股份有限公司 | A kind of on-line monitoring method of SVG device DC support capacitance fade situation |
| CN110556789A (en) * | 2018-05-31 | 2019-12-10 | 株洲中车时代电气股份有限公司 | Fault protection method and system for output filter capacitor of vehicle-mounted inverter |
| CN111638401A (en) * | 2020-06-11 | 2020-09-08 | 广东电网有限责任公司 | Capacitor online monitoring system and method |
| CN112083232A (en) * | 2020-08-31 | 2020-12-15 | 东南大学 | Capacitance value monitoring method for capacitor of modular multilevel converter |
| CN112327076A (en) * | 2020-10-26 | 2021-02-05 | 国网山东省电力公司淄博供电公司 | Method for diagnosing running state of series dry type reactor based on tan delta difference |
| CN112666415A (en) * | 2020-12-18 | 2021-04-16 | 安徽链众电气科技有限公司 | Power capacitor on-line monitoring device |
| CN113358939A (en) * | 2021-05-20 | 2021-09-07 | 西安交通大学 | Method for calculating polymer insulation dielectric loss under high field and high frequency |
| CN116298538A (en) * | 2023-05-17 | 2023-06-23 | 新乡市万新电气有限公司 | On-line monitoring method of intelligent capacitance compensation device |
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Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107884645A (en) * | 2017-11-03 | 2018-04-06 | 山东理工大学 | Based on voltage ratio compared with power capacitor method for monitoring operation states |
| CN110556789B (en) * | 2018-05-31 | 2021-11-19 | 株洲中车时代电气股份有限公司 | Fault protection method and system for output filter capacitor of vehicle-mounted inverter |
| CN110556789A (en) * | 2018-05-31 | 2019-12-10 | 株洲中车时代电气股份有限公司 | Fault protection method and system for output filter capacitor of vehicle-mounted inverter |
| CN110208606B (en) * | 2019-06-03 | 2021-03-19 | 河北旭辉电气股份有限公司 | Online monitoring method for attenuation condition of direct-current support capacitor of SVG device |
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| CN111638401A (en) * | 2020-06-11 | 2020-09-08 | 广东电网有限责任公司 | Capacitor online monitoring system and method |
| CN112083232A (en) * | 2020-08-31 | 2020-12-15 | 东南大学 | Capacitance value monitoring method for capacitor of modular multilevel converter |
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| CN112666415A (en) * | 2020-12-18 | 2021-04-16 | 安徽链众电气科技有限公司 | Power capacitor on-line monitoring device |
| CN113358939A (en) * | 2021-05-20 | 2021-09-07 | 西安交通大学 | Method for calculating polymer insulation dielectric loss under high field and high frequency |
| CN113358939B (en) * | 2021-05-20 | 2022-10-25 | 西安交通大学 | Method for calculating polymer insulation dielectric loss under high field and high frequency |
| CN116298538A (en) * | 2023-05-17 | 2023-06-23 | 新乡市万新电气有限公司 | On-line monitoring method of intelligent capacitance compensation device |
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Application publication date: 20170728 |