CN205982433U - High -pressure shunt capacitance ware overload protection device who possesses on -line monitoring function - Google Patents
High -pressure shunt capacitance ware overload protection device who possesses on -line monitoring function Download PDFInfo
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- CN205982433U CN205982433U CN201620998983.7U CN201620998983U CN205982433U CN 205982433 U CN205982433 U CN 205982433U CN 201620998983 U CN201620998983 U CN 201620998983U CN 205982433 U CN205982433 U CN 205982433U
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- 238000012544 monitoring process Methods 0.000 title claims abstract description 56
- 238000004891 communication Methods 0.000 claims abstract description 21
- 230000003993 interaction Effects 0.000 claims abstract description 16
- 239000003990 capacitor Substances 0.000 claims description 77
- 230000001681 protective effect Effects 0.000 claims description 19
- 230000003862 health status Effects 0.000 abstract description 16
- 230000006870 function Effects 0.000 description 34
- 238000005259 measurement Methods 0.000 description 8
- 230000005611 electricity Effects 0.000 description 7
- 238000000034 method Methods 0.000 description 6
- 238000012360 testing method Methods 0.000 description 6
- 230000002159 abnormal effect Effects 0.000 description 4
- 230000002452 interceptive effect Effects 0.000 description 4
- 230000008859 change Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 230000036541 health Effects 0.000 description 3
- 230000002411 adverse Effects 0.000 description 2
- 238000001514 detection method Methods 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 230000008901 benefit Effects 0.000 description 1
- 238000003745 diagnosis Methods 0.000 description 1
- 230000005684 electric field Effects 0.000 description 1
- 238000011156 evaluation Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 230000009993 protective function Effects 0.000 description 1
Abstract
The utility model relates to a high -pressure shunt capacitance ware overload protection device who possesses on -line monitoring function belongs to electric power system high pressure shunt capacitance ware operational monitoring and relay protection field. Technical scheme is: relay protection functional module (3) and on -line monitoring functional module (4) are connected respectively to the output of current -voltage collection module (2), and man -machine interaction module (5) and communication module (6) are connected respectively to the output of relay protection functional module (3), and man -machine interaction module (5) and communication module (6) are connected respectively to the output of on -line monitoring functional module (4). The utility model discloses the health status of high -pressure shunt capacitance ware is appraised in real time to the capacitance of real -time calculation high pressure shunt capacitance ware, can promote high -pressure shunt capacitance ware on -line monitoring's technical merit effectively, can extend high -pressure shunt capacitance ware overload protection device's function simultaneously effectively.
Description
Technical field
This utility model is related to a kind of high-voltage parallel capacitor protective relaying device possessing on-line monitoring function, for right
High-voltage parallel capacitor carries out relay protection and on-line monitoring, belongs to power system high-voltage parallel capacitor operational monitoring and relay
Protection field.
Background technology
High-voltage parallel capacitor, as a kind of important reactive power source, for improving NETWORK STRUCTURE PRESERVING POWER SYSTEM, improves electric energy matter
Amount plays the role of important.High-voltage parallel capacitor is mainly made up of capacitance core and shell.Capacitance core presses rule by dozens of element
Fixed series and parallel mode forms a complete entirety, and shell is welded into by sheet metal is curved, and two ends are equipped with propping up of installing for handling
Frame, equipped with the binding post of collar supports on cap.Inside the shell is full of the iknsulating liquid of function admirable in addition to fuse.
High-voltage parallel capacitor runs in rated condition for a long time, and the factor such as harmonic wave, overvoltage has bright to its health status
Aobvious infringement.Simultaneously with the use of Powerless voltage automatic control system, the switching of high-voltage parallel capacitor is more frequent.Badly
Running environment cause high-voltage parallel capacitor fault rate higher.Due to high-voltage parallel capacitor be typically located at low in transformator
Pressure side bus, are equivalent to transformator mesolow terminal short-circuit during its fault, transformator can be caused greater impact affect, be unfavorable for
The safe operation of transformator.Therefore in real time, the health status of accurate assurance high-voltage parallel capacitor, it is to avoid accident has non-
Often urgent necessity.
The fault of high-voltage parallel capacitor be usually from internal connection in series-parallel element abnormal, the fault of Individual elements start by
Step develops.When inside high-voltage parallel capacitor, single element occurs exception, fault, the change of its external electrical tolerance is often not
Greatly, the voltage that the other elements being healthy inside it bear can increase.With the growth of run time, other health
Connection in series-parallel element may occur exception and fault successively due to the impact of bad service condition, finally causes high-voltage parallel capacitor
Fault.
The detection method of the high-voltage parallel capacitor commonly used at present mainly has infrared diagnostics and capacitance test.Infrared measurement of temperature
Diagnosis cannot effective discovering device internal flaw.Capacitance detection belongs to the test that periodically has a power failure.Its test environment and equipment
Actual motion condition variant it is impossible to accurately reflect potential internal flaw.Simultaneously the test interval cycle longer it is impossible to real-time slap
Hold high-voltage parallel capacitor health status.
With the development of technology, the method occurring in that high-voltage parallel capacitor on-line monitoring.High by Real-time measuring and analyzing
Pressure shnt capacitor capacitance, to grasp high-voltage parallel capacitor health status, and sends out in shnt capacitor inner member
Raw abnormal, fault, but send alarm in time when shnt capacitor does not integrally break down, prevent from being finally evolved into shnt capacitor
Fault, it is to avoid high-voltage parallel capacitor equipment itself damages, reduces and power system and miscellaneous equipment is impacted.Its realization side
Method is usually to install core through type current transformer on capacitor connecting sleeve, in order to measure the electric current flowing through capacitor.In height
Voltage transformer or discharge coil are installed, in order to measure the voltage of capacitor two interpolar between the terminal of pressure shnt capacitor the two poles of the earth.Electricity
Pressure and electric current pass to calculation control unit by way of wired or wireless.Calculation control unit using measurement gained voltage and
Electric current is calculating capacitance, and according to electric capacitance change situation, high-voltage parallel capacitor health status is estimated.This side
Method primary disadvantage is that and increased other adnexaes in shunt reactor body.Adnexa operates in the adverse circumstances of high field intensity, high temperature
In easily break down, the overall maintenance of the equipment that increases, and Electric Field Distribution can be caused to change, to high-voltage parallel capacitor this
The normal operation of body brings adverse effect.Still an alternative is that the high-voltage parallel using measurement in power scheduling SCACD system
Condenser current, voltage data, calculate high-voltage parallel capacitor capacitance, thus judging its health status.The master of this method
Shortcoming is wanted to be that the data in power scheduling SCACD system is not real time data, same period etc. does not ask also to there is electric current, voltage sample
Topic.
High-voltage parallel capacitor protective relaying device, is when high-voltage parallel capacitor there occurs that fault jeopardizes power system peace
During row for the national games, can send warning signal in time to operator, or directly send tripping operation to the chopper being controlled
Order is to terminate a kind of measure of automatization and the equipment of the development of these events.Existing high-voltage parallel capacitor relay protection dress
Put, be all to cross the electric current of high-voltage parallel capacitor using the real-time measurement stream of current transformer installed, using being arranged on bus
Voltage transformer or being connected in parallel on the discharge coil of high-voltage parallel capacitor two interpolar measures high-voltage parallel capacitor two in real time
The voltage of interpolar.The feature that can be changed using electric current, voltage during high-voltage parallel capacitor fault, is surpassed by comparing electric current
Cross the method that setting valve or differential pressure, unbalance voltage exceed setting valve, judge that high-voltage parallel capacitor breaks down, thus to
The chopper being controlled sends trip signal excision fault.The high-voltage parallel capacitor protective relaying device using both at home and abroad at present
All do not possess the function of on-line monitoring.
Utility model content
The purpose of this utility model is to provide a kind of high-voltage parallel capacitor relay protection dress possessing on-line monitoring function
Put, complete the state estimation of high-voltage parallel capacitor, so that high-voltage parallel capacitor protective relaying device is possessed simple, efficient, complete
Kind high-voltage parallel capacitor on-line monitoring function, finds high-voltage parallel capacitor fault trend in time, solves in background technology
There are the problems referred to above.
This utility model purpose is realized by techniques below scheme：
A kind of high-voltage parallel capacitor protective relaying device possessing on-line monitoring function, comprises：Current/voltage gathers mould
Block, relay protection function module, on-line monitoring functional module, human-computer interaction module, communication module；Current/voltage acquisition module
Outfan connects relay protection function module and on-line monitoring functional module respectively, and the outfan of relay protection function module is respectively
Connect human-computer interaction module and communication module, the outfan of on-line monitoring functional module connects human-computer interaction module and communication respectively
Module.
Described on-line monitoring functional module and relay protection function module common current voltage acquisition module, man-machine interaction
Module and communication module.
Described current/voltage acquisition module, its input connects current transformer and voltage acquisition equipment, input electricity respectively
Stream, the analogue signal of voltage；Outfan connects relay protection function module and on-line monitoring functional module respectively；Realize high pressure simultaneously
The Real-time Collection of connection condenser current and voltage and calculating.
Described voltage acquisition equipment, is discharge coil or voltage transformer.
Described relay protection function module, accepts the signal from current/voltage acquisition module, carries out current/voltage value
Calculate, and complete relay protection function.
Described on-line monitoring functional module, accepts the signal from current/voltage acquisition module, carries out current/voltage value
Calculate, and then calculate the capacitance of shnt capacitor, by comparing with predetermined capacitive amount setting valve, judge high-voltage parallel capacitor
Health status.
Good effect of the present utility model is：Calculate the capacitance of high-voltage parallel capacitor in real time, Real-Time Evaluation high pressure is simultaneously
The health status of connection capacitor, whether on cost, still functionally all have obvious advantage than prior art, Ke Yiyou
The technical merit of effect ground lifting high-voltage parallel capacitor on-line monitoring, can simultaneously be effectively expands high-voltage parallel capacitor relay
The function of protection device.
Brief description
Fig. 1 is this utility model example structure schematic diagram.
In figure：Protective relaying device 1, current/voltage acquisition module 2, relay protection function module 3, on-line monitoring function mould
Block 4, human-computer interaction module 5, communication module 6, voltage transformer 7, discharge coil 8, current transformer 9, monitoring system 10；
Fig. 2 is this utility model embodiment one mode of connection schematic diagram；
In figure：Discharge coil 8, current transformer 9, high-voltage parallel capacitor 11, current-limiting reactor 12；
Fig. 3 is this utility model embodiment two mode of connection schematic diagram；
In figure：Voltage transformer 7, current transformer 9, high-voltage parallel capacitor 11, current-limiting reactor 12.
Specific embodiment
Below in conjunction with accompanying drawing, by embodiment, the utility model is described in further detail.
A kind of high-voltage parallel capacitor protective relaying device possessing on-line monitoring function, comprises：Current/voltage gathers mould
Block, relay protection function module, on-line monitoring functional module, human-computer interaction module, communication module；Current/voltage acquisition module
Outfan connects relay protection function module and on-line monitoring functional module respectively, and the outfan of relay protection function module is respectively
Connect human-computer interaction module and communication module, the outfan of on-line monitoring functional module connects human-computer interaction module and communication respectively
Module.
Described on-line monitoring functional module 4 and relay protection function module 3 common current voltage acquisition module 2, man-machine
Interactive module 5 and communication module 6.
Described current/voltage acquisition module 2, its input connects current transformer and voltage acquisition equipment, input electricity respectively
Stream, the analogue signal of voltage；Outfan connects relay protection function module 3 and on-line monitoring functional module 4 respectively；Realize high pressure
The Real-time Collection of shnt capacitor electric current and voltage and calculating.
Described voltage acquisition equipment, is discharge coil or voltage transformer.
Described relay protection function module, accepts the signal from current/voltage acquisition module, carries out current/voltage value
Calculate, and complete relay protection function.
Described on-line monitoring functional module, accepts the signal from current/voltage acquisition module, carries out current/voltage value
Calculate, and then calculate the capacitance of shnt capacitor, by comparing with predetermined capacitive amount setting valve, judge high-voltage parallel capacitor
Health status.
Embodiment one, referring to the drawings 1,2.
A kind of high-voltage parallel capacitor protective relaying device possessing on-line monitoring function, comprises：Current/voltage gathers mould
Block 2, relay protection function module 3, on-line monitoring functional module 4, human-computer interaction module 5, communication module 6；Current/voltage gathers
The outfan of module 2 connects relay protection function module 3 and on-line monitoring functional module 4 respectively, relay protection function module 3
Outfan connects human-computer interaction module 5 and communication module 6 respectively, and the outfan of on-line monitoring functional module 4 connects man-machine respectively
Interactive module 5 and communication module 6.The outfan of communication module 6 connects monitoring system 10.
Discharge coil 8 is connected in parallel on the two ends of high-voltage parallel capacitor 11, and the outfan of discharge coil 8 connects current/voltage and adopts
The voltage input end of collection module 2, as voltage input signal；The outfan of current transformer 9 connects current/voltage acquisition module 2
Current input terminal, as current input signal.Current and voltage signals are transferred to relay and protect by current/voltage acquisition module 2 respectively
Protective function module 3 and on-line monitoring functional module 4.Relay protection function module 3 calculates corresponding current/voltage, and completes relay
Defencive function.On-line monitoring functional module 4 calculates the electric current of corresponding high-voltage parallel capacitor, magnitude of voltage, and and then calculates high
The capacitance of pressure shnt capacitor.
For the mode of connection shown in accompanying drawing 2, its voltage takes from discharge coil 8.The formula that capacitance calculates is shown in formula（1）,
In formula, f is frequency, and I is electric current, and U is voltage.
On-line monitoring functional module 4, according to calculated capacitance value, by comparing with default setting valve, judges high
The health status of pressure shnt capacitor.In on-line monitoring functional module 4, preset in advance high-voltage parallel capacitor 11 capacitance is whole
Definite value and tolerance value.Capacitance presets setting valve typically using the electric capacitance measurement value having a power failure when testing, deviation allowable value
The certainty of measurement factor of protective relaying device need to be considered and retain adequate allowance.When the capacitance value calculating gained and electricity
When deviation between capacity setting valve is less than deviation allowable value, judge that high-voltage parallel capacitor health status are normal.When calculating institute
When deviation between the capacitance value obtaining and capacitance setting valve is more than deviation allowable value, judge high-voltage parallel capacitor health
Situation is abnormal.
The high-voltage parallel capacitor health status that on-line monitoring functional module 4 draws, man-machine by protective relaying device
Interactive module 5 is shown, and delivers to monitoring system 10 by the communication module 6 of protective relaying device.
Embodiment two, referring to the drawings 1,3.
Voltage transformer 7 is arranged on the bus that high-voltage parallel capacitor is connected, and the outfan of voltage transformer 7 connects
The voltage input end of current/voltage acquisition module 2, as voltage input signal；The outfan of current transformer 9 connects electric current electricity
The current input terminal of pressure acquisition module 2, as current input signal.Current/voltage acquisition module 2 is by current and voltage signals respectively
It is transferred to relay protection function module 3 and on-line monitoring functional module 4.Relay protection function module 3 gathers according to current/voltage
The input of module 2 calculates corresponding current/voltage, and completes relay protection function.On-line monitoring functional module 4 is according to electric current electricity
The input of pressure acquisition module 2, calculates electric current, the magnitude of voltage of corresponding high-voltage parallel capacitor, and and then calculates high-voltage parallel electricity
Capacity of condenser.
For the mode of connection shown in accompanying drawing 3, its voltage takes from voltage transformer 7.Capacitance computing formula is shown in formula（2）,
In formula, f is frequency, and I is electric current, and U is voltage, and L is current-limiting reactor inductance.
On-line monitoring functional module 4, according to calculated capacitance value, by comparing with default setting valve, judges high
The health status of pressure shnt capacitor.In on-line monitoring functional module 4, preset in advance high-voltage parallel capacitor capacitance is adjusted
Value and tolerance value.Capacitance presets setting valve typically using the electric capacitance measurement value having a power failure when testing, and deviation allowable value needs
Consider the certainty of measurement factor of protective relaying device and retain adequate allowance.When the capacitance value calculating gained and electric capacity
When deviation between amount setting valve is less than deviation allowable value, judge that high-voltage parallel capacitor health status are normal.When calculating gained
Capacitance value and capacitance setting valve between deviation be more than deviation allowable value when, judge high-voltage parallel capacitor health shape
Condition is abnormal.
The high-voltage parallel capacitor health status that on-line monitoring functional module 4 draws, man-machine by protective relaying device
Interactive module 5 is shown, and delivers to monitoring system 10 by the communication module 6 of protective relaying device.
Claims (4)
1. a kind of high-voltage parallel capacitor protective relaying device possessing on-line monitoring function, comprises：Current/voltage acquisition module
（2）, relay protection function module（3）, on-line monitoring functional module（4）, human-computer interaction module（5）, communication module（6）；Electric current
Voltage acquisition module（2）Outfan connect relay protection function module respectively（3）With on-line monitoring functional module（4）, relay
Defencive function module（3）Outfan connect human-computer interaction module respectively（5）And communication module（6）, on-line monitoring functional module
（4）Outfan connect human-computer interaction module respectively（5）And communication module（6）.
2. a kind of high-voltage parallel capacitor protective relaying device possessing on-line monitoring function according to claim 1, its
It is characterised by：Described on-line monitoring functional module（4）With relay protection function module（3）Common current voltage acquisition module
（2）, human-computer interaction module（5）And communication module（6）.
3. a kind of high-voltage parallel capacitor protective relaying device possessing on-line monitoring function according to claim 1, its
It is characterised by：Described current/voltage acquisition module（2）, its input connects current transformer and voltage acquisition equipment respectively.
4. a kind of high-voltage parallel capacitor protective relaying device possessing on-line monitoring function according to claim 3, its
It is characterised by：Described voltage acquisition equipment, is discharge coil or voltage transformer.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620998983.7U CN205982433U (en) | 2016-08-31 | 2016-08-31 | High -pressure shunt capacitance ware overload protection device who possesses on -line monitoring function |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201620998983.7U CN205982433U (en) | 2016-08-31 | 2016-08-31 | High -pressure shunt capacitance ware overload protection device who possesses on -line monitoring function |
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| CN205982433U true CN205982433U (en) | 2017-02-22 |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106896287A (en) * | 2017-04-13 | 2017-06-27 | 山东汇能电气有限公司 | The on-line monitoring method of power capacitor working condition in reactive power compensator |
| CN106990304A (en) * | 2017-04-13 | 2017-07-28 | 山东汇能电气有限公司 | Power capacitor running status on-line monitoring method based on capacitance |
| CN106990305A (en) * | 2017-04-13 | 2017-07-28 | 山东汇能电气有限公司 | The dry-type air-core reactor on-line monitoring method of high-voltage power capacitor complexes |
| CN109406883A (en) * | 2018-12-27 | 2019-03-01 | 日新电机（无锡）有限公司 | A kind of Assembled high-voltage shunted capacitor device and power equipment |
-
2016
- 2016-08-31 CN CN201620998983.7U patent/CN205982433U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106896287A (en) * | 2017-04-13 | 2017-06-27 | 山东汇能电气有限公司 | The on-line monitoring method of power capacitor working condition in reactive power compensator |
| CN106990304A (en) * | 2017-04-13 | 2017-07-28 | 山东汇能电气有限公司 | Power capacitor running status on-line monitoring method based on capacitance |
| CN106990305A (en) * | 2017-04-13 | 2017-07-28 | 山东汇能电气有限公司 | The dry-type air-core reactor on-line monitoring method of high-voltage power capacitor complexes |
| CN109406883A (en) * | 2018-12-27 | 2019-03-01 | 日新电机（无锡）有限公司 | A kind of Assembled high-voltage shunted capacitor device and power equipment |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CB03 | Change of inventor or designer information |
Inventor after: Gan Jingfu Inventor after: Yao Yuyong Inventor after: Mu Yong Inventor after: Lin Yifeng Inventor after: Gan Shuyu Inventor after: Xu Zigang Inventor after: Zhang Xuefeng Inventor after: Zhao Fuwang Inventor after: Wang Zengping Inventor after: Ma Jing Inventor after: Xiao Zhiguo Inventor after: Zhu Changrong Inventor after: Yao Qinghua Inventor after: Dan Qingyuan Inventor after: Li Aimin Inventor after: Zhang Xishu Inventor before: Gan Jingfu Inventor before: Yao Yuyong Inventor before: Mu Yong Inventor before: Lin Yifeng Inventor before: Gan Shuyu Inventor before: Xu Zigang Inventor before: Zhang Xuefeng Inventor before: Zhao Fuwang Inventor before: Wang Zengping Inventor before: Ma Jing Inventor before: Xiao Zhiguo Inventor before: Zhu Changrong Inventor before: Yao Qinghua Inventor before: Dan Qingyuan Inventor before: Li Aimin Inventor before: Zhang Xishu |
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| CB03 | Change of inventor or designer information |