CN105353792A - Reactive compensation device having capacitor temperature detection and protection functions - Google Patents
Reactive compensation device having capacitor temperature detection and protection functions Download PDFInfo
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- CN105353792A CN105353792A CN201510908142.2A CN201510908142A CN105353792A CN 105353792 A CN105353792 A CN 105353792A CN 201510908142 A CN201510908142 A CN 201510908142A CN 105353792 A CN105353792 A CN 105353792A
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- temperature
- capacitor
- control unit
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- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05D—SYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES
- G05D23/00—Control of temperature
- G05D23/19—Control of temperature characterised by the use of electric means
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H7/00—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions
- H02H7/16—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for capacitors
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J3/00—Circuit arrangements for ac mains or ac distribution networks
- H02J3/18—Arrangements for adjusting, eliminating or compensating reactive power in networks
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E40/00—Technologies for an efficient electrical power generation, transmission or distribution
- Y02E40/30—Reactive power compensation
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Control Of Electrical Variables (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Automation & Control Theory (AREA)
Abstract
The invention discloses a reactive compensation device having capacitor temperature detection and protection functions. The device includes a core control unit, an electric power parameter acquisition unit, a temperature detection unit, and an output alarm and temperature control unit, wherein the temperature detection unit detects temperature parameters of a top shell of a capacitor in real time and inputs the temperature parameters to the core control unit to be processed, and the core control unit equivalently obtains internal temperature of the capacitor according to a corresponding relation between the shell temperature and internal temperature of the capacitor, thereby judging whether the internal temperature of the capacitor exceeds a predetermined value; and when the temperature of a certain capacitor exceeds the predetermined value, the core control unit sends out a control signal to turn off the capacitor, the output alarm and temperature control unit triggers and gives a sound-light alarm, and cools the capacitor, at the same time another standby capacitor is put into operation, thus, since the capacitor adopts the temperature detection and protection functions, the life of the capacitor is effectively prolonged, and safety of an electric power system is guaranteed.
Description
Technical field
The present invention relates to the reactive power compensation technology of high-voltage electric power system, particularly a kind ofly provide the reactive power compensator of high temperature protection for capacitor.
Background technology
Along with progressively going deep into of electric network reconstruction, the high speed development of power matching network technology, reactive power compensator is adopted on a large scale.The power capacitor adopted in reactive power compensator, its Solid dielectric breakdown field intensity affects very large by capacitor internal temperature, therefore need to monitor its temperature.But because capacitor internal element is sealed in steel plate box inside, in operation, measure the more difficult realization of capacitor internal temperature, also unrealistic.And the too high capacitor life-span that easily causes of internal temperature reduces, even there is thermal breakdown and cause damaging; Meanwhile, if capacitor internal temperature is too high, insulating medium can decompose a large amount of gas, capacitor case expands, and even can produce blast time serious.Traditional technology does not have good solution at present to this.
According to research, capacitor life-span and temperature show as " octave principle ", and namely the normal prototype maximum temperature of conventional capacitor is 70 DEG C, and capacitor internal peak temperature often raises 8 DEG C, and capacitor life-span can shorten half; Applicant shows by experiment, and under room temperature condition, high-voltage capacitance is when 1.2 times of rated capacities are run, and when shell maximum temperature is than environment temperature height 8-10 DEG C, capacitor internal temperature reaches 70-90 DEG C.Therefore, to the thinking that prior art is improved be: can according to the relation of the skin temperature of capacitor in reactive power compensator and internal temperature, come equivalent go out capacitor internal temperature, realize carrying out monitoring to the capacitor in high-voltage electric power system and protecting.
Summary of the invention
The object of the invention is the weak point for above-mentioned prior art; a kind of reactive power compensator with capacitor temperature detection and defencive function is provided; capacitor internal temperature is gone out according to the equivalence of capacitor case temperature parameter; complete the detection to capacitor internal temperature; effectively can improve the life-span of capacitor; improve the security of electric system, there is rationality, feasibility.
The object of the invention is to be achieved through the following technical solutions: a kind of have capacitor temperature and detect and the reactive power compensator of defencive function, include key control unit, electric parameter acquisition unit, temperature detecting unit, output alarm and temperature control unit, it is characterized in that: the input end of key control unit is connected with temperature detecting unit with electric parameter acquisition unit respectively, wherein, electric parameter acquisition unit accesses electric system by sensor, temperature detecting unit is connected with key control unit by RS485 bus, the output termination output alarm of key control unit and temperature control unit, electric parameter acquisition unit acquisition system parameters of electric power, by accessing key control unit after AD conversion, the temperature parameter of the real-time sensing capacitor top casing of temperature detecting unit, and input key control unit and process, the skin temperature of key control unit according to capacitor and the corresponding relation of internal temperature, equivalence goes out capacitor internal temperature, thus judges whether capacitor internal temperature exceeds predetermined value, when a certain capacitor temperature exceeds predetermined value, key control unit sends control signal, cuts off this capacitor, and output alarm and temperature control unit triggering are carried out sound and light alarm, lowered the temperature to capacitor, and put into operation another spare capacitor simultaneously.
Further, described key control unit is made up of data processing module and capacitor switching module; Capacitor switching module is connected with data processing module by internal bus; The data that data processing module sends in real time according to electric parameter acquisition unit, calculate power system reactive power parameter, and when power factor does not reach specified value, capacitor switching module starts, and drops into corresponding capacitor; When the added time appearred in system, capacitor switching module cuts off corresponding capacitor, to keep power factor in specified value, data processing module is connected with temperature detecting unit by RS485 bus simultaneously, process the temperature signal from temperature detecting unit, real-time sensing capacitor skin temperature and environment temperature.
Described electric parameter acquisition unit is made up of sensor and A/D convertor circuit, and collecting sensor signal end is connected with voltage transformer secondary side in electric system, and the other end is connected with the data processing module in key control unit by A/D convertor circuit.
Described temperature detecting unit forwards/accepts module form by organizing infrared temperature sensor and temperature more, and the thermometric end of a part of infrared temperature sensor aims at capacitor top shell, for gathering capacitor case temperature; Another part infrared temperature sensor is positioned at the high-voltage board away from capacitor, for measuring cabinet environment temperature; The infrared temperature sensor other end forwards/accepts model calling by wireless transmission and temperature; Temperature is forwarded/accepts module and is connected with key control unit by RS485 bus, and key control unit is according to the corresponding relation between capacitor case and internal temperature, and equivalence goes out capacitor internal temperature.
Described output alarm and temperature control unit are made up of alarm lamp, driving circuit, heat sink, and driving circuit one end is connected with key control unit, and the other end is connected with heat sink by shielding line.
Research shows, capacitor life-span and temperature show as " octave principle ", and namely the normal prototype maximum temperature of conventional capacitor is 70 DEG C, and capacitor internal peak temperature often raises 8 DEG C, and capacitor life-span can shorten half.At ambient temperature, high-voltage capacitance is when 1.2 times of rated capacities are run, and when shell maximum temperature is than environment temperature height 8-10 DEG C, capacitor internal temperature reaches 70-90 DEG C.According to this experimental data, the skin temperature of capacitor and the corresponding relation of internal temperature can be established.
Beneficial effect of the present invention:
The present invention utilizes the skin temperature of capacitor and the corresponding relation of internal temperature, determines capacitor internal temperature, so just very accurately and timely can measure internal temperature when capacitor runs by the temperature of detection capacitor case is next equivalent.When internal temperature is too high, cuts off the too high capacitor of temperature in time, drop into spare capacitor simultaneously; The capacitor that temperature is too high is provided and protects timely, improve the operation life of high-voltage capacitor, reduce the use cost of whole reactive power compensator.
Accompanying drawing explanation
Fig. 1 is syndeton schematic diagram of the present invention.
Accompanying drawing illustrates: 1, key control unit; 2, electric parameter acquisition unit; 3, temperature detecting unit 4, output alarm and temperature control unit; 5, data processing module; 6, capacitor switching module; 7, infrared temperature sensor; 8, temperature forwards/accepts module.
Embodiment
See Fig. 1, a kind of reactive power compensator with capacitor temperature detection and defencive function of the present embodiment comprises: key control unit 1, electric parameter acquisition unit 2, temperature detecting unit 3, output alarm and temperature control unit 4, data processing module 5, capacitor switching module 6, infrared temperature detecting device 7, temperature forward/accept module 8.
Key control unit 1 is made up of data processing module 5 and capacitor switching module 6 and peripheral circuit, and data processing module 5 is primarily of Arm7 family chip and peripheral circuit composition; Capacitor switching module 6 is made up of controllable silicon and combination switch, and its one end is directly connected with core processing module 5, the other end by wire with how organize high-voltage capacitor and connects, can realize accessing electric system or cutting off with electric system the operation be connected to capacitor.
Electric parameter acquisition unit 2 is made up of high-accuracy voltage/current sensor and A/D convertor circuit, the signals collecting end of high-precision sensor is connected with voltage transformer secondary side in electric system, and the other end is connected with the data processing module 5 in described key control unit 1 by A/D convertor circuit.
Temperature detecting unit 3 forwards/accepts module 8 by infrared temperature sensor 7 and temperature and forms.Infrared temperature sensor 7 is divided into many groups, a part is positioned at capacitor case top, is used for measuring capacitor case temperature, and another group is arranged in the hyperbaric chamber away from capacitor, be used for measuring cabinet environment temperature, its infrared temperature sensor 7 other end forwards/accepts module 8 and is connected with temperature; Temperature is forwarded/accepts module 8 and is connected with key control unit 1 by RS485 bus.
Output alarm and temperature control unit 4 are made up of alarm lamp, driving circuit and heat sink;
When power factor is lower than setting, electric parameter acquisition unit 2 real-time acquisition system parameters of electric power signal, is transferred to data processing module 5 by A/D convertor circuit after being changed, calculate the required Capacitor banks number dropped into, capacitor switching module 6 sends instruction, drops into the capacitor of respective sets number; When capacitor runs with over-saturation state for extended periods, internal temperature raises, temperature monitoring unit 3 carries out Real-Time Monitoring, infrared temperature sensor more than 7 is organized and is monitored cabinet environment temperature and capacitor case temperature simultaneously, temperature signal is sent to temperature by wireless transmission and forwards/accept module 8, temperature forwards/accepts module 8, by RS485 bus, temperature data is transferred to key control unit 1; When detecting that near capacitor case, temperature is higher than cabinet environment temperature 8 DEG C, and when cabinet environment temperature is greater than 15 DEG C, capacitor switching module 6 sends instruction, the Capacitor banks that excision temperature is too high, drops into another spare capacitor simultaneously and runs; Output alarm and temperature control unit 4 send capacitor high temperature alarm, and heat sink is devoted oneself to work.When the capacitor case temperature that temperature is too high is reduced between setting district, heat sink quits work, all clear.
Should be understood that; the application of this patent is not limited to above-mentioned citing, for those of ordinary skills, can be improved according to the above description or convert; all these improve and convert the protection domain that all should belong to this patent claims, repeat no more here.
Claims (5)
1. one kind has the reactive power compensator of capacitor temperature detection and defencive function, include key control unit, electric parameter acquisition unit, temperature detecting unit, output alarm and temperature control unit, it is characterized in that: the input end of key control unit is connected with temperature detecting unit with electric parameter acquisition unit respectively, wherein, electric parameter acquisition unit accesses electric system by sensor, temperature detecting unit is connected with key control unit by RS485 bus, the output termination output alarm of key control unit and temperature control unit; Electric parameter acquisition unit acquisition system parameters of electric power, by accessing key control unit after AD conversion, the temperature parameter of the real-time sensing capacitor top casing of temperature detecting unit, and input key control unit and process, the skin temperature of key control unit according to capacitor and the corresponding relation of internal temperature, equivalence goes out capacitor internal temperature, thus judges whether capacitor internal temperature exceeds predetermined value; When a certain capacitor temperature exceeds predetermined value, key control unit sends control signal, cuts off this capacitor, and output alarm and temperature control unit triggering are carried out sound and light alarm, lowered the temperature to capacitor, and put into operation another spare capacitor simultaneously.
2. reactive power compensator according to claim 1, is characterized in that, described key control unit is made up of data processing module and capacitor switching module; Capacitor switching module is connected with data processing module by internal bus; The data that data processing module sends in real time according to electric parameter acquisition unit, calculate power system reactive power parameter, and when power factor does not reach specified value, capacitor switching module starts, and drops into corresponding capacitor; When the added time appearred in system, capacitor switching module cuts off corresponding capacitor, to keep power factor in specified value, data processing module is connected with temperature detecting unit by RS485 bus simultaneously, process the temperature signal from temperature detecting unit, the skin temperature of real-time sensing capacitor and environment temperature.
3. reactive power compensator according to claim 1 and 2, it is characterized in that, described electric parameter acquisition unit is made up of sensor and A/D convertor circuit, collecting sensor signal end is connected with voltage transformer secondary side in electric system, and the other end is connected with the data processing module in key control unit by A/D convertor circuit.
4. reactive power compensator according to claim 1 and 2, it is characterized in that, described temperature detecting unit forwards/accepts module form by organizing infrared temperature sensor and temperature more, and the thermometric end of a part of infrared temperature sensor aims at capacitor top shell, for gathering capacitor case temperature; Another part infrared temperature sensor is positioned at the high-voltage board away from capacitor, for measuring cabinet environment temperature; The infrared temperature sensor other end forwards/accepts model calling by wireless transmission and temperature; Temperature is forwarded/accepts module and is connected with key control unit by RS485 bus, and key control unit is according to the corresponding relation between capacitor case temperature and internal temperature, and equivalence goes out capacitor internal temperature.
5. reactive power compensator according to claim 1 and 2, it is characterized in that, described output alarm and temperature control unit are made up of alarm lamp, driving circuit, heat sink, and driving circuit one end is connected with key control unit, and the other end is connected with heat sink by shielding line.
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| CN201510908142.2A CN105353792B (en) | 2015-12-07 | 2015-12-07 | A kind of reactive power compensator with capacitor temperature detection and defencive function |
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| CN201510908142.2A CN105353792B (en) | 2015-12-07 | 2015-12-07 | A kind of reactive power compensator with capacitor temperature detection and defencive function |
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| CN105353792A true CN105353792A (en) | 2016-02-24 |
| CN105353792B CN105353792B (en) | 2017-07-28 |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105372513A (en) * | 2014-08-26 | 2016-03-02 | 上海思源电力电容器有限公司 | Intelligent temperature regulation analog capacitor and implementation method thereof |
| CN108110733A (en) * | 2016-11-25 | 2018-06-01 | 上海千槐电气有限公司 | The temperature protective device of low voltage power capacitor |
| CN108565871A (en) * | 2018-02-01 | 2018-09-21 | 合肥联信电源有限公司 | A kind of reactive compensation cabinet with remote monitoring function |
| CN110071511A (en) * | 2019-05-09 | 2019-07-30 | 浙江朗松智能电力设备有限公司 | A kind of reactive compensation controlling device and capacitor switching method |
| CN110808574A (en) * | 2019-10-08 | 2020-02-18 | 联合汽车电子有限公司 | Protection method and protection system of filter capacitor and motor controller |
| CN112486223A (en) * | 2020-12-10 | 2021-03-12 | 浙江天正电气股份有限公司 | Method and device for controlling temperature of capacitor |
| CN115173432A (en) * | 2022-07-20 | 2022-10-11 | 台州安耐杰电力设备有限公司 | Intelligent reactive power compensation device |
Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20020079878A1 (en) * | 2000-12-22 | 2002-06-27 | Swindler David L. | Device for controlling in rush current to power factor correcting capacitor bank |
| GB0212765D0 (en) * | 2002-05-31 | 2002-07-10 | Bowman Power Systems Ltd | High-frequency generator |
| WO2009114667A1 (en) * | 2008-03-14 | 2009-09-17 | Cooper Technologies Company | Capacitor bank monitor and method of use thereof |
| CN201570379U (en) * | 2009-11-12 | 2010-09-01 | 恒一电气有限公司 | Capacitor |
| CN202586280U (en) * | 2012-01-05 | 2012-12-05 | 北京赤那思电气技术有限公司 | An intelligent high-voltage parallel capacitor and a high-voltage automatic reactive compensator |
| CN202631641U (en) * | 2012-05-25 | 2012-12-26 | 北京中科瑞德科技发展有限公司 | On-line monitoring system for high-voltage condenser |
| CN203243049U (en) * | 2013-03-21 | 2013-10-16 | 河北南网电力节能服务有限公司 | Reactive power compensation energy-saving device |
| JP5441786B2 (en) * | 2010-03-29 | 2014-03-12 | 三菱電機株式会社 | Control device for power system stabilizer |
| CN104377707A (en) * | 2014-10-14 | 2015-02-25 | 苏州克兰兹电子科技有限公司 | Novel power grid reactive compensation device |
| CN204258318U (en) * | 2014-12-05 | 2015-04-08 | 安顺义兴电气有限公司 | Intelligent powerless compensation capacitor device |
-
2015
- 2015-12-07 CN CN201510908142.2A patent/CN105353792B/en active Active
Patent Citations (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20020079878A1 (en) * | 2000-12-22 | 2002-06-27 | Swindler David L. | Device for controlling in rush current to power factor correcting capacitor bank |
| GB0212765D0 (en) * | 2002-05-31 | 2002-07-10 | Bowman Power Systems Ltd | High-frequency generator |
| GB2389250A (en) * | 2002-05-31 | 2003-12-03 | Bowman Power Systems Ltd | Capacitor arrangement for preventing voltage drop |
| WO2009114667A1 (en) * | 2008-03-14 | 2009-09-17 | Cooper Technologies Company | Capacitor bank monitor and method of use thereof |
| CN201570379U (en) * | 2009-11-12 | 2010-09-01 | 恒一电气有限公司 | Capacitor |
| JP5441786B2 (en) * | 2010-03-29 | 2014-03-12 | 三菱電機株式会社 | Control device for power system stabilizer |
| CN202586280U (en) * | 2012-01-05 | 2012-12-05 | 北京赤那思电气技术有限公司 | An intelligent high-voltage parallel capacitor and a high-voltage automatic reactive compensator |
| CN202631641U (en) * | 2012-05-25 | 2012-12-26 | 北京中科瑞德科技发展有限公司 | On-line monitoring system for high-voltage condenser |
| CN203243049U (en) * | 2013-03-21 | 2013-10-16 | 河北南网电力节能服务有限公司 | Reactive power compensation energy-saving device |
| CN104377707A (en) * | 2014-10-14 | 2015-02-25 | 苏州克兰兹电子科技有限公司 | Novel power grid reactive compensation device |
| CN204258318U (en) * | 2014-12-05 | 2015-04-08 | 安顺义兴电气有限公司 | Intelligent powerless compensation capacitor device |
Non-Patent Citations (3)
| Title |
|---|
| 刘文泽: "高压电力电容器内部最热点温度的计算模型", 《电力自动化设备》 * |
| 张建军 等: "高压并联电容器在线监测系统的研究", 《电力电容器与无功补偿》 * |
| 李新海 等: "电容器故障在线监控系统的设计与实现", 《微计算机信息》 * |
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105372513A (en) * | 2014-08-26 | 2016-03-02 | 上海思源电力电容器有限公司 | Intelligent temperature regulation analog capacitor and implementation method thereof |
| CN105372513B (en) * | 2014-08-26 | 2019-03-15 | 上海思源电力电容器有限公司 | A kind of intelligent thermoregulating analog capacitor and its implementation |
| CN108110733A (en) * | 2016-11-25 | 2018-06-01 | 上海千槐电气有限公司 | The temperature protective device of low voltage power capacitor |
| CN108565871A (en) * | 2018-02-01 | 2018-09-21 | 合肥联信电源有限公司 | A kind of reactive compensation cabinet with remote monitoring function |
| CN110071511A (en) * | 2019-05-09 | 2019-07-30 | 浙江朗松智能电力设备有限公司 | A kind of reactive compensation controlling device and capacitor switching method |
| CN110808574A (en) * | 2019-10-08 | 2020-02-18 | 联合汽车电子有限公司 | Protection method and protection system of filter capacitor and motor controller |
| CN110808574B (en) * | 2019-10-08 | 2022-09-06 | 联合汽车电子有限公司 | Protection method and protection system of filter capacitor and motor controller |
| CN112486223A (en) * | 2020-12-10 | 2021-03-12 | 浙江天正电气股份有限公司 | Method and device for controlling temperature of capacitor |
| CN112486223B (en) * | 2020-12-10 | 2022-02-08 | 浙江天正电气股份有限公司 | Method and device for controlling temperature of capacitor |
| CN115173432A (en) * | 2022-07-20 | 2022-10-11 | 台州安耐杰电力设备有限公司 | Intelligent reactive power compensation device |
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