CN202189108U - On-line monitoring device for high voltage shunt capacitor - Google Patents
On-line monitoring device for high voltage shunt capacitor Download PDFInfo
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- CN202189108U CN202189108U CN2011203297420U CN201120329742U CN202189108U CN 202189108 U CN202189108 U CN 202189108U CN 2011203297420 U CN2011203297420 U CN 2011203297420U CN 201120329742 U CN201120329742 U CN 201120329742U CN 202189108 U CN202189108 U CN 202189108U
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Abstract
The utility model relates to an on-line monitoring device for a high voltage shunt capacitor, which comprises a plurality of capacitors, an indoor portion and an outdoor portion. The outdoor portion comprises a plurality of signal transducers, a plurality of data acquisition units used for collecting voltage signals set out by the signal transducers, an isolation transformer used for supplying power for the data acquisition units and a data merging unit. The indoor portion comprises a switch machine and a data-processing system, the data merging unit is connected with the switch machine, and the data-processing system comprises a signal analysis unit and a storage unit. The on-line monitoring device enables the photoelectric technology to be introduced in a high voltage shunt capacitor running status detection device through optical fiber, thoroughly solves problem that existing monitoring device for the high voltage shunt capacitor cannot conduct high and low potential isolation, adopts a plurality of data acquisition units to concurrent work, and improves efficiency of high voltage shunt capacitor running status detection device.
Description
Technical field
The utility model relates to the capacitor monitoring device, refers in particular to a kind of high-voltage parallel capacitor on-Line Monitor Device.
Background technology
High-voltage parallel capacitor group fault basically all is that wherein single capacitor breaks down earlier and in time finds to handle, and causes other capacitor fault then.But the capacitor group generally only can be monitored the busbar voltage and the bus current of whole group at present, is difficult to effectively each single capacitor running status monitored, and accomplishes in time to find in time to handle.
As shown in Figure 1; It has illustrated the fundamental diagram of prior art high-voltage parallel capacitor device on-line monitoring system; Realized the operational factor of every capacitor is monitored in real time, analyzed and reports to the police through sensor installation on every capacitor, can be used for real time on-line monitoring high-voltage parallel capacitor group running status.But the high-voltage parallel capacitor device that moves in the electric system mainly contains 10kV, 35kV, three electric pressures of 66kV, and wherein capacitor case is in earth potential in the capacitor device of 10kV, and installed capacity is little; Capacitor platform number generally is no more than 60; And 35kV and 66kV capacitor device are installed on the stand of insulation against ground, and capacitor case is in noble potential, and the sensor body of settling on it also is in noble potential; Installed capacity is bigger, maximum nearly 200 of capacitor platform number.Not enough below the technical scheme of conventional online monitoring system exists: (1) signal transducer and background process device are connect by signal cable; The cable transmission mode can't realize the potential isolation of first and second equipment room, so only can on the capacitor device of 10kV electric pressure, use; The capacitor maximum of (2) being monitored can not surpass 60, therefore exists very big use limitation.
Summary of the invention
The goal of the invention of the utility model provides a kind of high-voltage parallel capacitor on-Line Monitor Device; It overcomes the defective of prior art; Enlarge the scope of application of high-voltage parallel capacitor group running status on-Line Monitor Device, can monitor simultaneously the voltage and the electric current of many capacitors.
The utility model is achieved in that
A kind of high-voltage parallel capacitor on-Line Monitor Device; It is used to detect the running status of many capacitors; It comprises: indoor section and outdoor section, and a plurality of said capacitors are divided into three-phase, and three-phase condenser bank is installed on respectively on the capacitor platform; Said capacitor is connected with said outdoor section through optical fiber, and said outdoor section is connected with said indoor section through optical fiber;
Said outdoor section comprises:
A plurality of signal transducers, a plurality of said signal transducers are installed on respectively on the said capacitor;
Be used to collect a plurality of data acquisition units of the voltage signal that said signal transducer sends, said data acquisition unit is installed on the said capacitor platform, and said data acquisition unit is connected with said signal transducer through signal cable;
Be used for the isolating transformer to said data acquisition unit power supply, civil power is connected with said data acquisition unit through said isolating transformer;
The data merge cells, said data merge cells is connected with said data acquisition unit through optical fiber;
Said indoor section comprises:
Switch, said data merge cells is connected with said switch through optical fiber; And
Data handling system, said data handling system includes signal analysis unit, storage unit and query unit, and said signal analysis unit is connected with said switch, and said signal analysis unit is connected with said query unit and said storage unit;
Wherein, the external packets of said optical fiber is wrapped with insulating sheath, has strengthened the photoelectricity isolation effect of optical fiber.
Preferably; Said signal transducer includes current sensor and voltage sensor; Said current sensor is installed on the ferrule boot of each said capacitor; Said voltage sensor is installed on the support stand of capacitor platform of every phase capacitor group, respectively the electric current and the voltage of said capacitor is monitored in real time through said current sensor and said voltage sensor.
Alternative is that said voltage sensor is voltage transformer (VT) or voltage divider.
In order to improve the stability that said signal transducer transmits signal, said signal transducer is connected with said data acquisition unit with the mode that shielding inserts through aviation plug.
In order to ensure the reliability of said outdoor section, the data merge cells of said outdoor section is installed in the outdoor screen cabinet, and said outdoor screen cabinet places the outside of capacitor group fence.
Preferably, the outside of said isolating transformer is undertaken hermetically sealed by insulator; The class of insulation of said isolating transformer is higher than the class of insulation that is used for current potential, guarantees the security of said isolating transformer.
Preferably, said data handling system also comprises warning device, and said signal analysis unit is connected with said warning device, and the electric current that monitors capacitor when said signal analysis unit is or/and voltage signal when unusual, through said warning device to User Alarms.
Preferably, said data handling system also comprises display unit, and said display unit is connected with said signal analysis unit.
Preferably, said data acquisition unit is installed on the below of said capacitor platform.
The utility model high-voltage parallel capacitor on-Line Monitor Device compared with prior art has following beneficial effect:
1. through optical fiber photoelectric technology is incorporated in the high-voltage parallel capacitor monitoring running state device; Mode through opto-electronic conversion is gathered, the transmission of monitoring data, has thoroughly solved the existing defective that can't carry out the height potential isolation of existing high-voltage parallel capacitor monitoring device;
2. adopt the mode of a plurality of data acquisition unit concurrent workings, improved the capacitors count that to monitor greatly, improved the efficient of high-voltage parallel capacitor monitoring running state device;
3. can monitor in real time a plurality of capacitors simultaneously, in time find the capacitor fault, avoid taking place sudden accident; Simultaneously, effectively the reason and the process of electrolysis condenser fault, have to ground and adopt an effective measure, improve the capacitor operational reliability, avoid that the crowd hinders, the generation of group quick-fried accident.
Description of drawings
Fig. 1 is the fundamental diagram of the shnt capacitor On-line Fault monitoring system of prior art;
Fig. 2 is the structured flowchart of the utility model high-voltage parallel capacitor on-Line Monitor Device;
Fig. 3 is the electric hookup of every phase capacitor group;
Fig. 4 is the elementary diagram of isolating transformer.
Embodiment
Embodiment to the utility model is elaborated below in conjunction with accompanying drawing:
The utility model high-voltage parallel capacitor on-Line Monitor Device; It is used to detect the running status of many capacitors 1; Comprise: indoor section and outdoor section, said capacitor 1 is connected with said outdoor section through optical fiber, and said outdoor section is connected with said indoor section through optical fiber.
This present embodiment is an example with 35kV capacitor in the 500kV transformer station:
Many said capacitors 1 are divided into three-phase, and are installed on respectively on the capacitor platform 2.The capacitor 1 of the utility model adopts neutral point unbalance protection mode, and every phase capacitor 1 is installed on respectively on two capacitor platforms 2, and it is two-layer that every capacitor platform 2 has, and every layer each place half the capacitor 1, and three-phase condenser bank is totally 6 capacitor platforms.As shown in Figure 2, it has illustrated the wherein modes of emplacement of a phase capacitor, and the quantity of the capacitor 1 of present embodiment is 180, and every phase capacitor group is totally 60 capacitors 1, and therefore, two said capacitor platforms 2 are placed 1,28 capacitors 1 of 32 capacitors respectively.
As shown in Figure 3, said outdoor section comprises:
A plurality of signal transducers 3, a plurality of said signal transducers 3 are installed on respectively on the said capacitor 1;
Be used to collect a plurality of data acquisition units 4 of the voltage signal that said signal transducer 1 sends, said data acquisition unit 4 is installed on the said capacitor platform 2, and said data acquisition unit 4 is connected with said signal transducer 3 through signal cable;
Be used for the isolating transformer 5 to said data acquisition unit 4 power supplies, civil power is connected with said data acquisition unit 4 through said isolating transformer 5;
Data merge cells 6, said data merge cells 6 is connected with said data acquisition unit 5 through optical fiber.
Wherein, Said signal transducer 3 includes current sensor and voltage sensor; Said current sensor is installed on the ferrule boot of each said capacitor 1; Said voltage sensor is installed on the support stand of capacitor platform 2 of every phase capacitor 1, respectively the electric current and the voltage of said capacitor 1 is monitored in real time through said current sensor and said voltage sensor.
In the present embodiment; 180 capacitors 1 need 180 current sensors respectively every capacitor 1 to be monitored; Said current sensor is the design of hard opening core-theaded type; Each current sensor is transferred to said data acquisition unit 4 through signal cable with the signal of exporting, and signal cable can be laid along ferrule boot, case shell, joint hinge and the framework of said capacitor 1.
180 capacitors 1 are installed on 6 capacitor platforms 2, therefore, need 6 voltage sensors.Said voltage sensor can be voltage transformer (VT) or voltage divider.Present embodiment preferred voltage sensor is a voltage divider; Voltage divider high-voltage arm electric capacity is 500pF; Transmission voltage is 5V; The concrete structure type can adopt following mode: each of the branch pressure arm of voltage divider 1/2 is encapsulated in respectively in two compound insulating sleeves 31, and compound insulating sleeve 31 is installed on the support stand of the capacitor platform 2 that 28 capacitors 1 are installed, and receives the inlet wire and the neutral line of every phase capacitor group respectively; The secondary outlet is drawn from the small casing 32 of casing flange respectively, is connected with said data acquisition unit 4.
Because every phase capacitor 1 is placed on 2 platforms respectively; Be the authenticity of assurance signal and the ease for operation of field wiring; Scheme is followed the principle of gathering nearby; Data collecting unit 4 of capacitor signal independent installation of preferred every the capacitor platform 2 of present embodiment; Three-phase condenser bank is provided with 6 said data acquisition units 4 altogether, and each said data acquisition unit 4 can be gathered 36 tunnel simulating signals at most, and current sensor and voltage divider simulating signal are provided with through the mode that aviation plug, shielding insert.
The effect of said data acquisition unit 4 is voltage and current signals of collecting said signal transducer; Carry out signal Processing then; Mould/number conversion; The conversion of electricity/light, the signal that sensor signal is collected is a light signal by electrical signal conversion, is transferred to low-pressure side through optical fiber from the high-pressure side of capacitor 1 with the form of packet.Because optical fiber has good electrical insulation properties, just fundamentally solved the deficiency that to carry out the height potential isolation of high-voltage parallel capacitor on-line monitoring system in the past.
As shown in Figure 4; Because capacitor platform 2 is in 1/2 phase-to-ground voltage, for guaranteeing safe operation, it is the 35kV dielectric level that said isolating transformer 5 adopts a high grade; To guarantee the security of said isolating transformer 5; The outside of said isolating transformer 5 is undertaken hermetically sealed by insulator 51, input voltage and output voltage are alternating current 220V, and capacity is 10VA.
The electric power incoming line of said isolating transformer 5 and be used for passing down the optical fiber of the data of said data acquisition unit 4 need be laid penetration pipe in advance, and wherein optical cable need be laid to outdoor screen cabinet, and electric power incoming line leads to said isolating transformer 5 by power supply box.
In order to ensure the reliability of said indoor section, the said data merge cells 6 of said outdoor section is installed in the outdoor screen cabinet, and said outdoor screen cabinet places the outside of said capacitor group fence.
Said indoor section comprises:
Switch 7, said switch 7 is connected with said data merge cells 6 through optical fiber; And
Data handling system 8; Said data handling system includes signal analysis unit, storage unit, query unit and display unit; Said signal analysis unit is connected with said switch, and said signal analysis unit is connected with said query unit, said display unit and said storage unit.The preferred said data merge cells 6 of present embodiment is connected with the mode of said switch 7 through Ethernet, and said switch 7 also is connected through the mode of Ethernet with said data handling system 8.Said switch 7 converts its signal of receiving into electric signal from light signal, is convenient to said data handling system 8 and carries out the data analysis processing.
Receive the packet of current signal that includes said capacitor 1 that said data merge cells 6 sends and voltage signal when said data handling system 8 after; Through said signal analysis unit (monitoring software system) operational factor (the each switching situation of effective value, peak value, harmonic wave and capacitor that comprises the voltage and the electric current of capacitor) of each said transformer 1 is monitored and spectrum analysis in real time; And timing will be monitored and analysis result is stored in said storage unit; Be convenient to carry out historical query, know the problem such as fault type and reason of fault capacitor.
Preferably; Said data handling system 8 also comprises warning device, and said signal analysis unit is connected with said warning device, and the electric current that monitors capacitor 1 when said signal analysis unit is or/and voltage signal when unusual; Report to the police through said warning device, cause that the user notes.Said warning device can be alarm lamp and/or hummer.
In the utility model, in order to increase the photoelectricity isolation effect of optical fiber, the external packets of said optical fiber is wrapped with insulating sheath.
More than be merely the specific embodiment of the utility model, do not limit the protection domain of the utility model with this; Do not violate any replacement and the improvement of being done on the basis of the utility model design, all belonging to the protection domain of the utility model.
Claims (10)
1. high-voltage parallel capacitor on-Line Monitor Device; The running status that it is used to detect many capacitors is characterized in that, it comprises: indoor section and outdoor section; Capacitor is divided into three-phase; Three-phase condenser bank is installed on respectively on the capacitor platform, and said capacitor is connected with said outdoor section through optical fiber, and said outdoor section is connected with said indoor section through optical fiber;
Said outdoor section comprises:
A plurality of signal transducers, a plurality of said signal transducers are installed on respectively on the said capacitor;
Be used to collect a plurality of data acquisition units of the signal that said signal transducer sends, said data acquisition unit is installed on the said capacitor platform, and said data acquisition unit is connected with said signal transducer through signal cable;
Be used for the isolating transformer to said data acquisition unit power supply, civil power is connected with said data acquisition unit through said isolating transformer;
The data merge cells, said data merge cells is connected with said data acquisition unit through optical fiber;
Said indoor section comprises:
Switch, said data merge cells is connected with said switch through optical fiber; And
Data handling system, said data handling system includes signal analysis unit, storage unit and query unit, and said signal analysis unit is connected with said switch, and said signal analysis unit is connected with said query unit and said storage unit;
Wherein, the external packets of said optical fiber is wrapped with insulating sheath.
2. high-voltage parallel capacitor on-Line Monitor Device as claimed in claim 1; It is characterized in that; Said signal transducer includes current sensor and voltage sensor; Said current sensor is installed on the ferrule boot of each said capacitor, and said voltage sensor is installed on the support stand of capacitor platform of every phase capacitor group.
3. high-voltage parallel capacitor on-Line Monitor Device as claimed in claim 2 is characterized in that, said voltage sensor is voltage transformer (VT) or voltage divider.
4. high-voltage parallel capacitor on-Line Monitor Device as claimed in claim 1 is characterized in that, said signal transducer is connected with said data acquisition unit with the mode that shielding inserts through aviation plug.
5. high-voltage parallel capacitor on-Line Monitor Device as claimed in claim 1 is characterized in that, said data merge cells is installed in the outdoor screen cabinet, and said outdoor screen cabinet places the outside of capacitor group fence.
6. high-voltage parallel capacitor on-Line Monitor Device as claimed in claim 1 is characterized in that the outside of said isolating transformer is undertaken hermetically sealed by cotton up to.
7. high-voltage parallel capacitor on-Line Monitor Device as claimed in claim 1 is characterized in that the class of insulation of said isolating transformer is higher than the class of insulation that is used for current potential.
8. high-voltage parallel capacitor on-Line Monitor Device as claimed in claim 1 is characterized in that said data handling system also comprises warning device, and said signal analysis unit is connected with said warning device.
9. high-voltage parallel capacitor on-Line Monitor Device as claimed in claim 1 is characterized in that said data handling system also comprises display unit, and said display unit is connected with said signal analysis unit.
10. high-voltage parallel capacitor on-Line Monitor Device as claimed in claim 1 is characterized in that said data acquisition unit is installed on the below of said capacitor platform.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011203297420U CN202189108U (en) | 2011-09-05 | 2011-09-05 | On-line monitoring device for high voltage shunt capacitor |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011203297420U CN202189108U (en) | 2011-09-05 | 2011-09-05 | On-line monitoring device for high voltage shunt capacitor |
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| Publication Number | Publication Date |
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| CN202189108U true CN202189108U (en) | 2012-04-11 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2011203297420U Expired - Lifetime CN202189108U (en) | 2011-09-05 | 2011-09-05 | On-line monitoring device for high voltage shunt capacitor |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102928709A (en) * | 2012-10-31 | 2013-02-13 | 广东电网公司东莞供电局 | Three-phase harmonic wave-based method and system for detecting reactive compensation capacitor faults |
| CN103344852A (en) * | 2013-06-24 | 2013-10-09 | 国家电网公司 | On-line monitoring device of high-voltage parallel capacitor |
| CN103376375A (en) * | 2012-04-27 | 2013-10-30 | 上海三菱电梯有限公司 | Capacitor set internal connection mode identification and parameter setting method |
| CN103592554A (en) * | 2013-12-03 | 2014-02-19 | 武汉大学 | On-line monitoring system and method of 35kV high voltage shunt capacitor |
| CN103760431A (en) * | 2013-11-29 | 2014-04-30 | 国家电网公司 | Integrated online monitoring device of parallel capacitor |
| CN103926495A (en) * | 2014-05-05 | 2014-07-16 | 国家电网公司 | Zero-from raising voltage test system |
| CN104135359A (en) * | 2014-07-22 | 2014-11-05 | 南京磐能电力科技股份有限公司 | Hard real-time cascading multi-node synchronous sampling and data transmission method |
| CN108702309A (en) * | 2016-02-19 | 2018-10-23 | 赛峰电子与防务公司 | Communication network |
-
2011
- 2011-09-05 CN CN2011203297420U patent/CN202189108U/en not_active Expired - Lifetime
Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103376375B (en) * | 2012-04-27 | 2015-10-28 | 上海三菱电梯有限公司 | Capacitor set internal connection mode identification and parameter setting method |
| CN103376375A (en) * | 2012-04-27 | 2013-10-30 | 上海三菱电梯有限公司 | Capacitor set internal connection mode identification and parameter setting method |
| CN102928709A (en) * | 2012-10-31 | 2013-02-13 | 广东电网公司东莞供电局 | Three-phase harmonic wave-based method and system for detecting reactive compensation capacitor faults |
| CN103344852A (en) * | 2013-06-24 | 2013-10-09 | 国家电网公司 | On-line monitoring device of high-voltage parallel capacitor |
| CN103760431A (en) * | 2013-11-29 | 2014-04-30 | 国家电网公司 | Integrated online monitoring device of parallel capacitor |
| CN103592554A (en) * | 2013-12-03 | 2014-02-19 | 武汉大学 | On-line monitoring system and method of 35kV high voltage shunt capacitor |
| CN103592554B (en) * | 2013-12-03 | 2016-01-27 | 武汉大学 | A kind of 35kV high-voltage parallel capacitor on-line monitoring system and method |
| CN103926495B (en) * | 2014-05-05 | 2017-03-29 | 国家电网公司 | Stepping up from zero test system |
| CN103926495A (en) * | 2014-05-05 | 2014-07-16 | 国家电网公司 | Zero-from raising voltage test system |
| CN104135359A (en) * | 2014-07-22 | 2014-11-05 | 南京磐能电力科技股份有限公司 | Hard real-time cascading multi-node synchronous sampling and data transmission method |
| CN104135359B (en) * | 2014-07-22 | 2017-12-12 | 南京磐能电力科技股份有限公司 | Tandem type multi-node synchronization sampling and data transmission method when a kind of strong |
| CN108702309A (en) * | 2016-02-19 | 2018-10-23 | 赛峰电子与防务公司 | Communication network |
| CN108702309B (en) * | 2016-02-19 | 2022-06-03 | 赛峰电子与防务公司 | Communication network |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20120411 |