CN201607492U - Fault pre-alarm system for 10-kV power capacitor - Google Patents
Fault pre-alarm system for 10-kV power capacitor Download PDFInfo
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- CN201607492U CN201607492U CN2010201294226U CN201020129422U CN201607492U CN 201607492 U CN201607492 U CN 201607492U CN 2010201294226 U CN2010201294226 U CN 2010201294226U CN 201020129422 U CN201020129422 U CN 201020129422U CN 201607492 U CN201607492 U CN 201607492U
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Abstract
The utility model discloses a fault pre-alarm system for a 10-kV power capacitor, which comprises an electric measuring unit, a station end management unit, an intelligent temperature measuring unit connected with the surface of a capacitor shell, and a current transformer sheathed on a capacitor insulating sleeve. The first end of the electric measuring unit is respectively connected with the current transformer and a discharge voltage transformer which is connected on the capacitor, the second end of the electric measuring unit is connected with the station end management unit, and the intelligent temperature measuring unit is connected with the station end management unit. As the discharge voltage transformer is utilized and the current transformer for measuring current of the capacitor is provided, the fault pre-alarm system realizes on-line electrified collection of electric parameters of the capacitor without power-off; moreover, the fault pre-alarm system can send out alarm signals according to the temperature raise value and the capacitance value, so as to exert the pre-alarm function on faults of the capacitor.
Description
Technical field
The utility model relates to transformer station, relates in particular to a kind of 10KV power capacitor fault early warning system.
Background technology
10KV capacitor operation life in the transformer station remove with the quality of product own mutually outside the Pass, also closely bound up with factors such as system voltage quality (excessive), environment temperature, maintenance qualitys as overtension or voltage harmonic content, when single capacitor damage in the capacitor group causes whole group capacitor to trip, other capacitors will be impacted, the partition capacitance device can damage because of being hit, the quick-fried fault of capacitor cohort can take place in severe patient, has enlarged the scope and the influence of accident.In general the phenomenon that the capacitor temperature obviously raises under capacitance substantial deviation ratings, the normal voltage can appear before the capacitor fault.
Power supply department is the method that adopts prophylactic repair to capacitor at present, promptly under power down mode, come the capacitance of Measurement of capacitor with measurement instrument, if exceeding standard, then this capacitor is replaced capacitance, but this method can only be during interruption maintenance energy measurement capacitance, the capacitor fault is not had the effect of reporting to the police with early warning.
Summary of the invention
The utility model provides a kind of 10KV power capacitor fault early warning system, and it can play forewarning function.
10KV power capacitor fault early warning system of the present utility model comprises:
Electrical measurement unit, the end administrative unit of standing, with the surperficial intelligent temperature measurement unit that is connected of capacitor case and be enclosed within current transformer on the capacitor insulation sleeve pipe;
First end of described electrical measurement unit is connected with sparking voltage mutual inductor on being connected capacitor with described current transformer respectively, and second end is connected with described station end administrative unit; Described intelligent temperature measurement unit is connected with described station end administrative unit;
The magnitude of voltage of capacitor is gathered in described electrical measurement unit by described sparking voltage mutual inductor, gather the current value of capacitor by described current transformer, and the magnitude of voltage of described collection and current value are carried out frequency spectrum calculate condenser voltage first-harmonic and condenser current first-harmonic, and this condenser voltage first-harmonic that calculates and condenser current first-harmonic are sent to described station end administrative unit; Described intelligent temperature measurement unit is gathered the temperature rise value of capacitor and is sent to described station end administrative unit; Described station end administrative unit calculates capacitance according to the described condenser voltage first-harmonic and the condenser current first-harmonic that receive, sends early warning signal according to described capacitance and described temperature rise value.
Fault early warning system of the present utility model can be gathered the condenser voltage value, gather current value by current transformer by the sparking voltage mutual inductor, calculate condenser voltage first-harmonic and condenser current first-harmonic again, draw the capacitance of capacitor at last, can send early warning signal according to this temperature rise value and capacitance, owing to utilized the sparking voltage mutual inductor, the current transformer of Measurement of capacitor electric current has been installed, has been realized the charged online acquisition of the electric parameter of capacitor, need not have a power failure and to carry out; Send alerting signal according to temperature rise value and capacitance in addition, can play forewarning function the capacitor fault.
Description of drawings
Fig. 1 is the utility model early warning system structured flowchart in one embodiment;
Fig. 2 is the utility model early warning system structured flowchart in another embodiment.
Embodiment
Below in conjunction with accompanying drawing specific embodiment of the utility model is done a detailed elaboration.
The utility model 10KV power capacitor fault early warning system is used for the 10KV power capacitor of transformer station is carried out fault pre-alarming, and as Fig. 1, it comprises:
Electrical measurement unit, the end administrative unit of standing, with the surperficial intelligent temperature measurement unit (when specifically implementing, the probe of intelligent temperature measurement unit can be fixed on the capacitor case surface) that is connected of capacitor case and be enclosed within current transformer on the capacitor insulation sleeve pipe;
First end of described electrical measurement unit is connected with sparking voltage mutual inductor on being connected capacitor with described current transformer respectively, and second end is connected with described station end administrative unit; Described intelligent temperature measurement unit is connected with described station end administrative unit;
The magnitude of voltage of capacitor is gathered in described electrical measurement unit by described sparking voltage mutual inductor, gather the current value of capacitor by described current transformer, and the magnitude of voltage of described collection and current value are carried out frequency spectrum calculate (it can be that FFT calculates that this frequency spectrum calculates) and draw condenser voltage first-harmonic and condenser current first-harmonic, and this condenser voltage first-harmonic that calculates and condenser current first-harmonic are sent to described station end administrative unit; Described intelligent temperature measurement unit is gathered the temperature rise value of capacitor and is sent to described station end administrative unit; Described station end administrative unit calculates capacitance according to the described condenser voltage first-harmonic and the condenser current first-harmonic that receive, sends early warning signal according to described capacitance and described temperature rise value.
The end administrative unit of standing can be provided with predetermined value, sends early warning signal when described capacitance surpasses when predetermined value and/or temperature rise value surpass predetermined value, and this station end administrative unit can provide soft message and hard contact early warning, and alarm window alarm mode also can be provided simultaneously.
This shows that fault early warning system of the present utility model has been installed the current transformer of Measurement of capacitor electric current owing to utilized the sparking voltage mutual inductor, has realized the charged online acquisition of the electric parameter of capacitor, need not have a power failure and can carry out; Send alerting signal according to temperature rise value and capacitance in addition, can play forewarning function the capacitor fault.
Wherein, the intelligent temperature measurement unit can be the practical networking module that cooperates U.S. DALLAS one line field bus technique, realizes low-cost state of temperature on-line monitoring scheme, can be widely used in the various application scenarios of real time temperature data acquisition and monitoring.This intelligent temperature measurement unit can carry out temperature data acquisition to DS1820 digital temperature sensor series of products, makes the temperature data logger system obtain high reliability, low cost and the simplest wire structures.As the ideal substitute of traditional temp measuring system, characteristics such as volume is little, measuring point is many, networking flexibility that it has.Use this intelligent temperature measurement unit, can satisfy the temperature data acquisition of 64 points, use surface-pasted temperature sensor probe, can be fixed on the capacitor case surface temperature measurement.This intelligent temperature measurement unit uses the RS485 networking mode.
Because station end administrative unit is positioned at transformer station, inconvenient remote monitoring management, in the specific implementation, the utility model can also comprise distant place main website administrative unit, as Fig. 2, be connected with described station end administrative unit, described station end administrative unit sends to described distant place main website administrative unit with described temperature rise value, capacitance.Can make things convenient for distant place central manage-ment unit that the status data of capacitor is monitored or early warning like this, formulate corresponding the maintenance and the maintenance strategy.This distant place main website administrative unit can be connected by wide area network, electric power LAN (Local Area Network) or dedicated network with station end administrative unit.
In the specific implementation, as Fig. 2, first end of described electrical measurement unit can also connect with bus-bar potential transformer (this bus-bar potential transformer is connected with bus), bus voltage value is gathered by described bus-bar potential transformer in this electrical measurement unit, this bus voltage value is carried out frequency spectrum calculating (can be that FFT calculates) draw busbar voltage first-harmonic and harmonic wave, and send to station end administrative unit; The electrical measurement unit is used for that also the magnitude of voltage of the capacitor of described collection and current value are carried out frequency spectrum and calculates condenser voltage harmonic wave and condenser current harmonic wave, and sends to station end administrative unit; Stand the end administrative unit according to the busbar voltage first-harmonic that receives and the running environment of harmonic wave, condenser voltage harmonic wave and condenser current harmonic monitoring capacitor.End administrative unit in station can be judged the duty that capacitor is present by receiving busbar voltage first-harmonic and harmonic wave, condenser voltage first-harmonic and harmonic wave and condenser current first-harmonic and harmonic wave like this, when breaking down, also make things convenient for the failure cause of capacitor is analyzed, great role is played in maintenance and maintenance.
In addition, described station end administrative unit also can send to described busbar voltage first-harmonic and harmonic wave, condenser voltage harmonic wave and condenser current harmonic wave described distant place main website administrative unit.Make things convenient for the present duty of distant place main website administrative unit monitoring capacitor, the reason that capacitor breaks down is analyzed.Main website administrative unit in a distant place can involve capacitance and temperature rise value is preserved to the busbar voltage harmonic wave, condenser voltage harmonic wave and the condenser current that receive are humorous, checks after convenient and manages, and these data can periodically be preserved.
Because the data volume that the electrical measurement unit is gathered is big, require very high for data rate, an Ethernet interface can be set on the electrical measurement unit for this reason, the electrical measurement unit is connected with station end administrative unit by this Ethernet interface, this Ethernet interface message transmission rate is 100Mbps, can satisfy the transmission of high-speed data.
As Fig. 2, early warning system of the present utility model can also comprise switch, and described Ethernet interface is connected with described station end administrative unit by switch with described intelligent temperature measurement unit.Switch can transmit the end administrative unit of arriving at a station again with the data sink General Logistics Department of electrical measurement unit and the output of intelligent temperature measurement unit like this, and convenient station end administrative unit is put in order and analyzed the data that receive, and also can improve data rate simultaneously.
Above-described the utility model embodiment does not constitute the qualification to the utility model protection domain.Any modification of within spirit of the present utility model and principle, being done, be equal to and replace and improvement etc., all should be included within the claim protection domain of the present utility model.
Claims (6)
1. a 10kV power capacitor fault early warning system is characterized in that, comprising:
Electrical measurement unit, the end administrative unit of standing, with the surperficial intelligent temperature measurement unit that is connected of capacitor case and be enclosed within current transformer on the capacitor insulation sleeve pipe;
First end of described electrical measurement unit is connected with sparking voltage mutual inductor on being connected capacitor with described current transformer respectively, and second end is connected with described station end administrative unit; Described intelligent temperature measurement unit is connected with described station end administrative unit;
The magnitude of voltage of capacitor is gathered in described electrical measurement unit by described sparking voltage mutual inductor, gather the current value of capacitor by described current transformer, and the magnitude of voltage of described collection capacitor and current value are carried out frequency spectrum calculate condenser voltage first-harmonic and condenser current first-harmonic, and this condenser voltage first-harmonic that calculates and condenser current first-harmonic are sent to described station end administrative unit; Described intelligent temperature measurement unit is gathered the temperature rise value of capacitor and is sent to described station end administrative unit; Described station end administrative unit calculates capacitance according to the described condenser voltage first-harmonic and the condenser current first-harmonic that receive, sends early warning signal according to described capacitance and described temperature rise value.
2. 10KV power capacitor fault early warning system according to claim 1, it is characterized in that: also comprise distant place main website administrative unit, be connected with described station end administrative unit, described station end administrative unit sends to described distant place main website administrative unit with described temperature rise value and capacitance.
3. 10KV power capacitor fault early warning system according to claim 1, it is characterized in that: first end of described electrical measurement unit also be connected bus on bus-bar potential transformer be connected, bus voltage value is gathered by described bus-bar potential transformer in this electrical measurement unit, this bus voltage value is carried out frequency spectrum calculate busbar voltage first-harmonic and harmonic wave, and send to station end administrative unit; Described electrical measurement unit is used for that also the magnitude of voltage of the capacitor of described collection and current value are carried out frequency spectrum and calculates condenser voltage harmonic wave and condenser current harmonic wave, and sends to station end administrative unit; Described station end administrative unit is according to the busbar voltage first-harmonic that receives and the running environment of harmonic wave, condenser voltage harmonic wave and condenser current harmonic monitoring capacitor.
4. 10KV power capacitor fault early warning system according to claim 2, it is characterized in that: first end of described electrical measurement unit also be connected bus on bus-bar potential transformer be connected, bus voltage value is gathered by described bus-bar potential transformer in this electrical measurement unit, this bus voltage value is carried out frequency spectrum calculate busbar voltage first-harmonic and harmonic wave, and send to station end administrative unit; Described electrical measurement unit is used for that also the magnitude of voltage of the capacitor of described collection and current value are carried out frequency spectrum and calculates condenser voltage harmonic wave and condenser current harmonic wave, and sends to station end administrative unit; Stand the end administrative unit according to the busbar voltage first-harmonic that receives and the running environment of harmonic wave, condenser voltage harmonic wave and condenser current harmonic monitoring capacitor, and described busbar voltage harmonic wave, condenser voltage harmonic wave and condenser current harmonic wave are sent to described distant place main website administrative unit.
5. according to the described 10KV power capacitor of the arbitrary claim of claim 1 to 4 fault early warning system, it is characterized in that: described electrical measurement unit is provided with Ethernet interface, and described electrical measurement unit is connected with described station end administrative unit by Ethernet interface.
6. 10KV power capacitor fault early warning system according to claim 5 is characterized in that: also comprise switch, described Ethernet interface is connected with described station end administrative unit by switch with the intelligent temperature measurement unit.
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| Application Number | Priority Date | Filing Date | Title |
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| CN2010201294226U CN201607492U (en) | 2010-03-08 | 2010-03-08 | Fault pre-alarm system for 10-kV power capacitor |
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| CN2010201294226U CN201607492U (en) | 2010-03-08 | 2010-03-08 | Fault pre-alarm system for 10-kV power capacitor |
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| CN201607492U true CN201607492U (en) | 2010-10-13 |
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| CN2010201294226U Expired - Lifetime CN201607492U (en) | 2010-03-08 | 2010-03-08 | Fault pre-alarm system for 10-kV power capacitor |
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Cited By (9)
| 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 |
| CN103454517A (en) * | 2013-06-26 | 2013-12-18 | 广东电网公司佛山供电局 | Method for online monitoring capacitive voltage transformers |
| CN104569615A (en) * | 2015-01-20 | 2015-04-29 | 国家电网公司 | Capacitor bank fault detection system |
| CN104597341A (en) * | 2015-01-04 | 2015-05-06 | 贵阳供电局 | Method for diagnosing faults inside capacitor in distribution network series compensation |
| CN107505511A (en) * | 2016-06-14 | 2017-12-22 | 北京天诚同创电气有限公司 | life cycle prediction method, device and system of direct current support capacitor |
| CN109884436A (en) * | 2019-03-19 | 2019-06-14 | 国网山东省电力公司淄博供电公司 | Power capacitor complexes on-line monitoring method |
| CN112345865A (en) * | 2020-11-10 | 2021-02-09 | 内蒙古科技大学 | Power capacitor running state online evaluation early warning device and method |
| CN114122996A (en) * | 2021-11-25 | 2022-03-01 | 广东电网有限责任公司 | Capacitor maintenance method and device and transformer voltage regulation early warning method and device |
| CN114527331A (en) * | 2022-02-10 | 2022-05-24 | 天纳能源科技（上海）有限公司 | Capacitor analysis method and system |
-
2010
- 2010-03-08 CN CN2010201294226U patent/CN201607492U/en not_active Expired - Lifetime
Cited By (13)
| 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 |
| CN103454517A (en) * | 2013-06-26 | 2013-12-18 | 广东电网公司佛山供电局 | Method for online monitoring capacitive voltage transformers |
| CN103454517B (en) * | 2013-06-26 | 2016-05-11 | 广东电网公司佛山供电局 | Capacitance type potential transformer on-line monitoring method |
| CN104597341A (en) * | 2015-01-04 | 2015-05-06 | 贵阳供电局 | Method for diagnosing faults inside capacitor in distribution network series compensation |
| CN104597341B (en) * | 2015-01-04 | 2017-05-31 | 贵阳供电局 | Capacitor internal method for diagnosing faults in a kind of distribution series compensation |
| CN104569615A (en) * | 2015-01-20 | 2015-04-29 | 国家电网公司 | Capacitor bank fault detection system |
| CN107505511A (en) * | 2016-06-14 | 2017-12-22 | 北京天诚同创电气有限公司 | life cycle prediction method, device and system of direct current support capacitor |
| CN109884436A (en) * | 2019-03-19 | 2019-06-14 | 国网山东省电力公司淄博供电公司 | Power capacitor complexes on-line monitoring method |
| CN109884436B (en) * | 2019-03-19 | 2021-07-06 | 国网山东省电力公司淄博供电公司 | Online monitoring method for power capacitor complete equipment |
| CN112345865A (en) * | 2020-11-10 | 2021-02-09 | 内蒙古科技大学 | Power capacitor running state online evaluation early warning device and method |
| CN114122996A (en) * | 2021-11-25 | 2022-03-01 | 广东电网有限责任公司 | Capacitor maintenance method and device and transformer voltage regulation early warning method and device |
| CN114527331A (en) * | 2022-02-10 | 2022-05-24 | 天纳能源科技（上海）有限公司 | Capacitor analysis method and system |
| CN114527331B (en) * | 2022-02-10 | 2023-02-10 | 天纳能源科技（上海）有限公司 | Capacitor analysis method and system |
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Granted publication date: 20101013 |
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| CX01 | Expiry of patent term |