CN101174759A - Integrated monitoring apparatus for electrical power distribution - Google Patents
Integrated monitoring apparatus for electrical power distribution Download PDFInfo
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- CN101174759A CN101174759A CNA2007101568587A CN200710156858A CN101174759A CN 101174759 A CN101174759 A CN 101174759A CN A2007101568587 A CNA2007101568587 A CN A2007101568587A CN 200710156858 A CN200710156858 A CN 200710156858A CN 101174759 A CN101174759 A CN 101174759A
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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
Abstract
The present invention provides a power distribution comprehensive monitoring device for the power system. The device includes a central processing unit, an alternating sample module, a temperature measuring module, a moist measuring module, a reactive-load compensation output module, a relay output module, a communication module, a storage module and a man-machine interface module. The alternating sample module, the storage module and the man-machine interface module are respectively connected with the data bus of the central processing unit and controlled by the central processing unit; the temperature measuring module and the moist measuring module are connected with the input terminal of the central processing unit; the reactive-load compensation output and the relay output module are connected with the output terminal of the central processing unit; the communication module is connected with the communication terminal of the central processing unit. Besides the conventional electric parameter collection and reactive-load compensation, the device has the temperature and humidity measuring and controlling function.
Description
Technical field
The present invention relates to a kind of distribution monitor device that is used for electric power system, particularly a kind of have the measurement of temperature, humidity and a distribution monitor device of controlled function.
Background technology
Characteristics such as box-type substation has compact conformation, complete property is strong, floor space is little, convenient for installation and maintenance, handsome in appearance are subjected to the attention of countries in the world power department, have also obtained at home extensively installing and using.Box-type substation generally is placed in the open air, and its surrounding environment is comparatively abominable, and it is bigger that its temperature inside the box, humidity are influenced by the case external environment.If hyperbaric chamber and low-pressure chamber generation condensation then will jeopardize electrical apparatus insulation and cause cut-offfing failure.And if the transformer temperature surpasses scope once, then can influence power output, weight person can cause the transformer operation irregularity, causes the transformer internal pressure to increase, so need to monitor the oily temperature of transformer and the state of pressure relief valve in real time, guarantees the normal operation of equipment.In addition, transformer station's indoor temperature external environment temperature of standing wants high, when the attendant enters transformer station and carries out operation and maintenance, should take a breath support personnel's safety to room air.
The integrated monitoring apparatus for electrical power distribution of installing in the box-type substation generally all only has electric parameter collection or reactive power compensation controlled function such as conventional voltage, electric current, power, electric weight at present.Need in the transformer station temperature and humidity supervising device is installed in addition, cause instrument numerous, not only increased input, and, increased the workload of safeguarding because the box-type substation compact conformation has also strengthened the workload of wiring.And present distribution terminal does not realize that all the real-time monitoring of transformer pressure relief valve state and switch door detect and change wind control.
Summary of the invention
Primary and foremost purpose of the present invention is to overcome the deficiencies in the prior art, a kind of integrated monitoring apparatus for electrical power distribution that is applicable to electric power system is provided, this device is except that having conventional electric parameter collection and no-power compensation function, and the measurement and control, the real-time monitoring of transformer pressure relief valve state, the switch door that also have temperature, humidity detect and change the wind controlled function.
For this reason, the technical solution used in the present invention is as follows:
A kind of integrated monitoring apparatus for electrical power distribution comprises central processing unit, AC sampling module, switch door and pressure relief valve detection module, temperature-measuring module, condensation measurement module, reactive power compensation output module, 4 road relay output modules, communication module, power module, memory module, human-computer interface module.Described AC sampling module, switch door and pressure relief valve detection module, memory module, human-computer interface module are connected with the data/address bus of central processing unit respectively, and are controlled by central processing unit; Described temperature-measuring module, condensation measurement module connect the input port of central processing unit; Described reactive power compensation output module, relay output module connect the output port of central processing unit; Described communication module connects the PORT COM of central processing unit; Power module 8 provides the working power of whole device.
The input of described AC sampling module links to each other with voltage transformer, current transformer, and module comprises AC signal amplifying circuit, anti-aliasing filter circuit, frequency measurement circuit, synchronized sampling circuit.
Described temperature-measuring module has temperature sensor interface, and temperature sensor interface connects the Pt100 platinum resistance, and module also comprises signaling conversion circuit, signal amplification circuit, 4 ~ 20mA signal output conversion circuit.
Described condensation measurement module comprises condensation transducer, signaling conversion circuit, signal amplification circuit, 4 ~ 20mA signal output conversion circuit.
Have 1 the tunnel to be used to control the blower fan that ventilation is used in the described relay output module, the 1 tunnel is used to control heating plate.
Described switch door and pressure relief valve detection module and central processing unit electrical isolation, and under the control of central processing unit the in real time state of sense switch door and the state of pressure relief valve.
Compared with prior art, the invention has the beneficial effects as follows:
1, this installs real-time measuring transformer oil temperature and room temperature, and when temperature surpassed setting range, the control apparatus output module of giving an order output started blower fan and forces the air draft cooling.
2, this installs real-time measures ambient humidity, and is excessive when the case internal-external temperature difference, reaches to set humidity or during near condensation, the control apparatus output module of giving an order output starts heating plate work, eliminates condensation.
When 3, the transformer station gate was opened, illumination and blower fan were opened in device control, and room air is taken a breath, and ensure operation and maintenance personnel's health.
4, monitor the state of transformer pressure relief valve in real time, when abnormal state, report to the police immediately.
Description of drawings
Fig. 1 is the present embodiment system block diagram.
Fig. 2 is an AC sampling modular circuit schematic diagram.
Fig. 3 is switch door and pressure relief valve testing circuit modular circuit schematic diagram.
Fig. 4 is the temperature-measuring module circuit diagram.
Fig. 5 is a condensation measurement module circuit diagram.
Embodiment
Below, the present invention will be further described with accompanying drawing in conjunction with the embodiments.
As shown in Figure 1, the integrated monitoring apparatus for electrical power distribution of the embodiment of the invention comprises with lower member:
Central processor CPU 1, AC sampling module 2, switch door and pressure relief valve testing circuit module 3, temperature-measuring module 4, condensation measurement module 5, reactive power compensation output module 6, relay output module 7, communication module 8, power module 9, memory module 10 and human-computer interface module 11.Wherein, AC sampling module, switch door and pressure relief valve detection module, memory module, human-computer interface module are connected with the data/address bus of central processing unit respectively, and are controlled by central processing unit; Temperature-measuring module, condensation measurement module connect the input port of central processing unit; Reactive power compensation output module, 4 road relay output modules connect the output port of central processing unit; Communication module connects the PORT COM of central processing unit; Power module provides the working power of whole device.
Described AC sampling module 2 is accepted the signal of voltage transformer summation current transformer, carries out the high precision analogue conversion, and transformation result is sent to described central processor CPU 1; Central processor CPU 1 control switch door and pressure relief valve testing circuit module 3 are with the sampling period sampling real-time status value of 1s; Temperature-measuring module 4 is converted to the variation of temperature sensor actual resistance value and is sent to central processor CPU 1; Condensation measurement module 5 is converted to the variation of humidity sensor corresponding humidity value and is sent to central processor CPU 1, described reactive power compensation output module 6 is opened Lou (OC) output for the transistor collector of isolating, be used to drive switching elements such as combination switch, realize reactive power compensation control output; Described relay output module 7 has 1 the tunnel to be used to control the blower fan that ventilation is used, and 1 the tunnel is used to control heating plate, can realize the control of temperature and condensation; Described communication module 8 is used for scene and telecommunication; Described memory module 10 is carried out the exchange of ephemeral data and the storage of historical data; Human-computer interface module 11 adopts touches button and extensive dot matrix demonstration liquid crystal display screen, is used for data and shows and the parameter setting.
As Fig. 2, AC sampling module in the present embodiment has 6 tunnel analog input channels, connect No. 3 voltage transformers and No. 3 current transformers, voltage transformer is used to measure 3 cross streams input voltages, current transformer is used to measure 3 phase input currents, their signal amplifies by the AC signal amplifying circuit of being made up of operational amplifier OP297 and precision resistance, and carry out low-pass filtering by the anti-aliasing filter circuit that operational amplifier OP297 forms, wherein filtered A phase voltage signal also is sent to the frequency measurement circuit of being made up of operational amplifier LM324 simultaneously, with conversion of signals is the square wave of same frequency, sends into central processor CPU 1 and carries out grid frequency measurement.Central processor CPU 1 is according to the mains frequency of measuring in real time, and control synchronized sampling circuit exchanges input variable to filtered 6 the tunnel and carries out synchronized sampling, and the ripple equal interval sampling is 128 times weekly.The data of sampling obtain the first-harmonic of electric current and voltage and the component of each harmonic through after Fourier (FFT) conversion, and by calculate power factor, power arranged, parameters such as reactive power, electric weight.
In the present embodiment, the transducer of temperature-measuring module 4 is selected the PT100 platinum resistance for use, has that temperature response is fast, precision is high, the advantage of good reliability.Because the response of Pt100 transducer is sensitive, if it is excessive to detect electric current, will causes the sensor internal temperature rise, thereby influence temperature measurement accuracy.Therefore the signaling conversion circuit of inside modules adopts the constant-current source excitation of 0.25mA, the resistance value of platinum sensor is converted to faint voltage signal, by the signal amplification circuit amplification of being made up of operational amplifier OPA335.Because field condition is different, temperature survey point might be far away from main frame, if adopt voltage signal to transmit, signal accuracy is subjected to the influence of transmission line impedance bigger, if select the mode of digital communication for use, then need to increase CPU, increase the cost of product, make whole apparatus structure complicated, and the electric current loop signal of employing 4-20mA then can effectively address this problem, even temperature survey point is far away from the distance of main frame, signal drives by 4 ~ 20mA signal output conversion circuit, also can guarantee the precision of transmitting.
The signaling conversion circuit of moisture measurement transmitting module 5 is converted to faint voltage signal with the resistance value of condensation transducer, amplify by the signal amplification circuit of forming by operational amplifier LM324, the same with temperature-measuring module 4, amplifying signal is sent to the input port of central processor CPU 1 by 4 ~ 20mA signal output conversion circuit.
Switch door and pressure relief valve testing circuit module and other circuit electrical isolation, detected state quantity signal are carried out electrical isolation by optocoupler PS2701 and are sent to central processor CPU 1.
The current signal of 1 pair of temperature survey transmitting module 4 of central processor CPU carries out the high precision analogue conversion.The linearized algorithm of the built-in PT100 of processor by the corresponding relation formula (I) of the temperature of Pt100 and resistance value as can be known, as long as obtain the resistance value of platinum resistance, can accurately be reduced to corresponding temperature value by calculating.
RTD(T)＝RTD
0(1+AT+BT
2-(100CT
3+CT
4)) (I)
Parameter at this device is provided with in the interface, and every temperature control parameter is arranged: room temperature upper limit TH1, room temperature lower limit TL1, oily temperature upper limit TH2, oily temperature lower limit TL2.If the room temperature of transformer room surpasses capping value TH1, perhaps temperature of oil in transformer surpasses upper limit TH2, and the then relay contact conducting of blower fan correspondence in central processor CPU 1 control 4 road relay output modules 7 makes exhaust system work, carry out the air blast cooling heat radiation, reduce the temperature inside the box; When the temperature of transformer room is lower than room temperature lower limit TL1 and temperature of oil in transformer is lower than oily temperature lower limit TL2, then central processor CPU 1 is closed the relay of blower fan correspondence, and exhaust system quits work.Like this, not only effectively prolonged the working life of blower fan, and reduced noise.Central processor CPU 1 is saved to information described memory cell simultaneously, is used for inquiring about and data statistics in the future.
The electric current loop signal of 1 pair of condensation measurement module 5 of central processor CPU carries out the high precision analogue conversion, obtains current humidity value.Parameter at device is provided with in the interface, the humidity Control Parameter is arranged: humidity upper limit NLH and humidity lower limit NLL.If ambient humidity reaches when setting humidity NLH or condensation, the then relay contact conducting of heating system correspondence in central processor CPU 1 control 4 road relay output modules 7 makes heating plate work, and water evaporation is also taken away by exhaust system; Set lower limit NLL when the humidity of environment is lower than, then central processor CPU 1 is closed the relay output of heating system correspondence, stops heating plate work, and relevant information is saved to described memory cell, is used for inquiring about and data statistics in the future.
Central processor CPU 1 is with the interval sampling switch door of setting and the signal of pressure relief valve testing circuit module, be in abnormality if detect the transformer pressure relief valve, then excise all reactive-load compensation capacitors of switching rapidly, warning message is presented on the liquid crystal display screen simultaneously, information pass is preserved described memory cell, and by described communication module with the alert data teletransmission to control centre.Open if detect the transformer station gate, then central processing unit controls 4 road relay output modules 7 are opened illumination and blower fan, and room air is taken a breath, and ensure operation and maintenance personnel's health.
Central processor CPU 1 is tasks such as control data communication, man-machine interface, auto power-factor compensating simultaneously.
Claims (9)
1. integrated monitoring apparatus for electrical power distribution is characterized in that comprising:
Central processing unit, AC sampling module, temperature-measuring module, condensation measurement module, reactive power compensation output module, relay output module, communication module, power module, memory module, human-computer interface module;
Described AC sampling module, memory module, human-computer interface module are connected with the data/address bus of central processing unit respectively, and are controlled by central processing unit; Described temperature-measuring module, condensation measurement module connect the input port of central processing unit; Described reactive power compensation output module, relay output module connect the output port of central processing unit; Described communication module connects the PORT COM of central processing unit; Power module provides the working power of whole device.
2. integrated monitoring apparatus for electrical power distribution according to claim 1, it is characterized in that: also comprise the switch door and the pressure relief valve detection module that link to each other with central processing unit, the state of real-time sense switch door and the state of pressure relief valve under the control of central processing unit.
3. integrated monitoring apparatus for electrical power distribution according to claim 1, it is characterized in that: described AC sampling module comprises AC signal amplifying circuit, anti-aliasing filter circuit, frequency measurement circuit and synchronized sampling circuit, and the input of AC sampling module connects the voltage transformer summation current transformer.
4. integrated monitoring apparatus for electrical power distribution according to claim 2, it is characterized in that: described AC sampling module comprises AC signal amplifying circuit, anti-aliasing filter circuit, frequency measurement circuit and synchronized sampling circuit, and the input of AC sampling module connects the voltage transformer summation current transformer.
5. according to each described integrated monitoring apparatus for electrical power distribution of claim 1-4, it is characterized in that: described temperature-measuring module comprises temperature sensor interface, this interface connects the Pt100 platinum resistance, and this temperature-measuring module also comprises signaling conversion circuit, signal amplification circuit and 4 ~ 20mA signal output conversion circuit.
6. according to each described integrated monitoring apparatus for electrical power distribution of claim 1-4, it is characterized in that: described condensation measurement module comprises condensation transducer, signaling conversion circuit, signal amplification circuit and 4 ~ 20mA signal output conversion circuit.
7. integrated monitoring apparatus for electrical power distribution according to claim 5 is characterized in that: described condensation measurement module comprises condensation transducer, signaling conversion circuit, signal amplification circuit and 4 ~ 20mA signal output conversion circuit.
8. according to each described integrated monitoring apparatus for electrical power distribution of claim 1-4, it is characterized in that: described relay output module is provided with two-way at least, and one the tunnel is used to control the blower fan that ventilation is used, and one the tunnel is used to control heating plate.
9. integrated monitoring apparatus for electrical power distribution according to claim 7 is characterized in that: described relay output module is four the tunnel, the one tunnel to be used to control the blower fan that ventilation is used, and one the tunnel is used to control heating plate, and other 2 the tunnel are used for Long-distance Control output.
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| CN2007101568587A CN101174759B (en) | 2007-11-15 | 2007-11-15 | Integrated monitoring apparatus for electrical power distribution |
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|---|---|---|---|
| CN2007101568587A CN101174759B (en) | 2007-11-15 | 2007-11-15 | Integrated monitoring apparatus for electrical power distribution |
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| CN101174759A true CN101174759A (en) | 2008-05-07 |
| CN101174759B CN101174759B (en) | 2011-05-25 |
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Cited By (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101902076A (en) * | 2010-07-08 | 2010-12-01 | 南京康尼科技实业有限公司 | Switch cabinet status display controller |
| CN101968522A (en) * | 2010-08-27 | 2011-02-09 | 杭州远方光电信息股份有限公司 | Electrical property measuring apparatus |
| CN102801174A (en) * | 2012-08-31 | 2012-11-28 | 长沙威胜能源产业技术有限公司 | Main control module for low-voltage dynamic reactive harmonic comprehensive compensation device |
| CN102904180A (en) * | 2012-10-24 | 2013-01-30 | 四川省电力公司绵阳电业局 | Heat dissipation control device of switch cabinet |
| CN103219656A (en) * | 2013-05-08 | 2013-07-24 | 株洲南车机电科技有限公司 | Power distribution cabinet for wind power tower barrel |
| CN103336544A (en) * | 2013-05-30 | 2013-10-02 | 成都众山科技有限公司 | Multifunctional telemetry system having temperature telemetering function |
| CN103368267A (en) * | 2013-08-08 | 2013-10-23 | 重庆樱花电气开关有限公司 | Low-voltage distribution integrated management system |
| CN103390863A (en) * | 2013-08-08 | 2013-11-13 | 安徽集黎电气技术有限公司 | Intelligent control device for switch cabinet |
| CN104701762A (en) * | 2015-03-12 | 2015-06-10 | 中国工商银行股份有限公司 | Machine-room power distribution cabinet |
| CN105226679A (en) * | 2015-09-29 | 2016-01-06 | 特变电工新疆新能源股份有限公司 | A kind of online control method dynamically suppressing electricity grid oscillating and sub-synchronous oscillation |
| CN105790136A (en) * | 2016-04-08 | 2016-07-20 | 中科电力装备科技有限公司 | Automatic temperature-control dehumidifying distribution box |
| CN105811583A (en) * | 2016-05-09 | 2016-07-27 | 孙文兵 | Intelligent power supply and distribution monitoring apparatus |
| CN107293946A (en) * | 2017-08-03 | 2017-10-24 | 重庆水利电力职业技术学院 | Terminal box of transformer substation monitoring system |
| CN110071429A (en) * | 2019-05-29 | 2019-07-30 | 湖北中巽泰科技有限公司 | A kind of passive multi-compartment anti-condensation control system and its control method |
| CN115236428A (en) * | 2022-06-17 | 2022-10-25 | 山东电工电气集团新能科技有限公司 | Detection device and detection method for DTU power distribution terminal |
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| US7062359B2 (en) * | 2000-12-29 | 2006-06-13 | Abb Ab | Substation control system |
| CN2531357Y (en) * | 2002-02-09 | 2003-01-15 | 淄博中瑞电气有限公司 | Unattended substation malfunction comprehensive early warning apparatus |
| CN2687912Y (en) * | 2004-02-26 | 2005-03-23 | 武汉江北开关有限责任公司 | Intelligent low-voltage box type converting station |
| CN1632996A (en) * | 2004-12-22 | 2005-06-29 | 刘建南 | An intelligent transformer operating and controlling device and its use |
| CN101059692B (en) * | 2007-04-30 | 2011-06-01 | 深圳日海通讯技术有限公司 | Integrated monitoring system integration |
| CN201118104Y (en) * | 2007-11-15 | 2008-09-17 | 杭州大有科技发展有限公司 | Electrical distribution integrated monitoring apparatus |
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Cited By (18)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101902076A (en) * | 2010-07-08 | 2010-12-01 | 南京康尼科技实业有限公司 | Switch cabinet status display controller |
| CN101968522A (en) * | 2010-08-27 | 2011-02-09 | 杭州远方光电信息股份有限公司 | Electrical property measuring apparatus |
| CN101968522B (en) * | 2010-08-27 | 2013-07-17 | 杭州远方光电信息股份有限公司 | Electrical property measuring apparatus |
| CN102801174A (en) * | 2012-08-31 | 2012-11-28 | 长沙威胜能源产业技术有限公司 | Main control module for low-voltage dynamic reactive harmonic comprehensive compensation device |
| CN102904180A (en) * | 2012-10-24 | 2013-01-30 | 四川省电力公司绵阳电业局 | Heat dissipation control device of switch cabinet |
| CN102904180B (en) * | 2012-10-24 | 2016-09-21 | 国网四川省电力公司绵阳供电公司 | Heat dissipation control device of switch cabinet |
| CN103219656A (en) * | 2013-05-08 | 2013-07-24 | 株洲南车机电科技有限公司 | Power distribution cabinet for wind power tower barrel |
| CN103336544A (en) * | 2013-05-30 | 2013-10-02 | 成都众山科技有限公司 | Multifunctional telemetry system having temperature telemetering function |
| CN103390863A (en) * | 2013-08-08 | 2013-11-13 | 安徽集黎电气技术有限公司 | Intelligent control device for switch cabinet |
| CN103368267A (en) * | 2013-08-08 | 2013-10-23 | 重庆樱花电气开关有限公司 | Low-voltage distribution integrated management system |
| CN104701762A (en) * | 2015-03-12 | 2015-06-10 | 中国工商银行股份有限公司 | Machine-room power distribution cabinet |
| CN105226679A (en) * | 2015-09-29 | 2016-01-06 | 特变电工新疆新能源股份有限公司 | A kind of online control method dynamically suppressing electricity grid oscillating and sub-synchronous oscillation |
| CN105790136A (en) * | 2016-04-08 | 2016-07-20 | 中科电力装备科技有限公司 | Automatic temperature-control dehumidifying distribution box |
| CN105811583A (en) * | 2016-05-09 | 2016-07-27 | 孙文兵 | Intelligent power supply and distribution monitoring apparatus |
| CN107293946A (en) * | 2017-08-03 | 2017-10-24 | 重庆水利电力职业技术学院 | Terminal box of transformer substation monitoring system |
| CN110071429A (en) * | 2019-05-29 | 2019-07-30 | 湖北中巽泰科技有限公司 | A kind of passive multi-compartment anti-condensation control system and its control method |
| CN110071429B (en) * | 2019-05-29 | 2023-07-28 | 湖北中巽泰科技有限公司 | Passive multi-interval condensation prevention control system and control method thereof |
| CN115236428A (en) * | 2022-06-17 | 2022-10-25 | 山东电工电气集团新能科技有限公司 | Detection device and detection method for DTU power distribution terminal |
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Effective date of registration: 20180814 Address after: 310009 158 Jianguo South Road, Hangzhou, Zhejiang Co-patentee after: Zhejiang da you Industrial Co., Ltd. Hangzhou science and technology development branch Patentee after: ZHEJIANG DAYOU INDUSTRIAL CO., LTD. Address before: 310012 78 GUCUI Road, Hangzhou, Zhejiang Patentee before: Hangzhou Dayou Technology Development Co., Ltd. |
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