CN104155559A - Insulating on-line monitoring system for high-voltage electrical equipment - Google Patents
Insulating on-line monitoring system for high-voltage electrical equipment Download PDFInfo
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- CN104155559A CN104155559A CN201410313813.6A CN201410313813A CN104155559A CN 104155559 A CN104155559 A CN 104155559A CN 201410313813 A CN201410313813 A CN 201410313813A CN 104155559 A CN104155559 A CN 104155559A
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Abstract
The invention discloses an insulating on-line monitoring system for a plurality of pieces of high-voltage electrical equipment. The insulating on-line monitoring system comprises on-site monitoring units and a station side control host, wherein each on-site monitoring unit comprises a CPU, a wireless communication module and a GPS clock receiving module, wherein each CPU is connected with each wireless communication module and each GPS clock receiving module; the wireless communication modules of the on-site monitoring units are connected with the station side control host through a wireless network; each on-site monitoring unit comprises a probe T1, a probe T2, a current acquisition circuit connected with the probe T1 and the probe T2, a voltage acquisition circuit connected with the current acquisition circuit, a power amplification circuit connected with the voltage acquisition circuit, and a drive circuit connected with the power amplification circuit. The insulating on-line monitoring system for the high-voltage electrical equipment, provided by the invention, is high in sensitivity and precision.
Description
Technical field
The present invention relates to a kind of monitoring system, specifically refer to a kind of high voltage electric equipment insulated on-line monitoring system.
Background technology
The net capacity of China continues to increase, electric pressure also significantly promotes thereupon, this safe operation to electrical network is had higher requirement, if its inner existence because of deficient manufacturing procedure, the insulation defect that aging and outside destroy causes, the insulation fault of can make a difference equipment and electric power netting safe running when high voltage electric equipment moves in electrical network.So, the insulating monitoring of old equipment is just seemed to particularly important.But, in actual insulating monitoring process, often run into because the defect of type insulation monitoring system cannot monitor electric leakage situation in the very first time, maybe cannot monitor micro-electric leakage, thereby impact the insulation fault of equipment and electric power netting safe running.Designing a kind of high voltage electric equipment insulated on-line monitoring system highly sensitive, that precision is high is the pressing issues that now face.
Summary of the invention
The object of the invention is to overcome often run in actual insulating monitoring process and cannot monitor electric leakage situation in the very first time because of the defect of type insulation monitoring system, maybe cannot monitor micro-electric leakage, thereby the problem that impacts the insulation fault of equipment and electric power netting safe running provides a kind of high voltage electric equipment insulated on-line monitoring system
Object of the present invention is achieved through the following technical solutions: a kind of high voltage electric equipment insulated on-line monitoring system, comprise monitoring means on the spot, stand and hold main control system, described monitoring means on the spot comprises CPU, wireless communication module, gps clock receiver module, CPU and wireless communication module, gps clock receiver module is connected, the wireless communication module of monitoring means is connected by wireless network with station end main control system on the spot, described monitoring means on the spot comprises probe T1, probe T2, the current collection circuit being connected with probe T2 with probe T1, voltage collection circuit is connected with current collection circuit, the power amplification circuit being connected with voltage collection circuit, and the driving circuit being connected with power amplification circuit composition.
Described current collection circuit is by sensor U; one end and the capacitor C 1 that probe T1 is connected, the other end is connected with probe T2; the N utmost point is connected with probe T1 after resistance R 1, the P utmost point after capacitor C 2 with the diode D1 that is connected of probe T2; the N utmost point and the diode D2 that the P utmost point of diode D1 is connected, the P utmost point is connected with the OUT utmost point of sensor U after capacitor C 3, the diode D3 composition that the N utmost point is connected with the P utmost point of diode D2, the P utmost point is connected with probe T2; Gnd electrode ground connection, the IN utmost point of described sensor U are connected with the tie point of resistance R 1 and diode D1, and the OUT utmost point of sensor U is connected with voltage collection circuit, and the P utmost point of diode D3 is connected with voltage collection circuit.
Described voltage acquisition road comprises: sensor U1, resistance R 2, resistance R 3, capacitor C 4, capacitor C 5; The IN utmost point of described sensor U1 is connected with power amplification circuit after capacitor C 5, the OUT utmost point is connected with power amplification circuit after capacitor C 4, gnd electrode ground connection after resistance R 2, and one end of resistance R 3 is connected with power amplification circuit, the other end is also connected with power amplification circuit when being connected with the P utmost point of diode D3.The IN utmost point of described sensor U1 is also connected with the OUT utmost point of sensor U.
Described power amplification circuit comprises: resistance R 5, power amplifier PA2, resistance R 4, power amplifier PA1, inductance L 1; The negative pole of described power amplifier PA2 is connected with capacitor C 5, positive pole is connected with the output terminal of merit end rate amplifier PA1 after resistance R 4, output terminal is connected with driving circuit, the negative pole of power amplifier PA1 is connected with resistance R 3, positive pole is connected with capacitor C 4, resistance R 5 is serially connected with between the negative pole and output terminal of power amplifier PA2, and inductance L 1 is serially connected with between the positive pole and output terminal of power amplifier PA1.
Described driving circuit comprises: drive chip U2, diode D4, transistor VT1, resistance R 6, capacitor C 6, capacitor C 7; The N utmost point of diode D4 is connected with the output terminal of power amplifier PA2, the P utmost point is connected with the VIN pin that drives chip U2, the base stage of transistor VT1 is connected with the output terminal of power amplifier PA2, collector through resistance R 6 be connected with probe T2 after capacitor C 7, emitter is connected with probe T2 after capacitor C 6, drive the RT pin of chip U2 to be connected with the tie point of capacitor C 7 with resistance R 6, CS pin and LD pin respectively with pop one's head in that T2 is connected, GND pin ground connection.
The present invention compares compared with prior art, has the following advantages and beneficial effect:
(1) the present invention is very easy to use, and stability is high.
(2) the present invention compares with traditional insulated on-line monitoring system, and sensitivity is higher, monitoring accuracy is higher, safer.
(3) sensitivity of the present invention is higher, monitoring accuracy is higher, monitoring effect is better, prevents the insulation fault of equipment and electrical network generation safe operation, reduces maintenance of equipment, operating cost.
Brief description of the drawings
Fig. 1 is the structural principle schematic diagram of system of the present invention.
Fig. 2 is the circuit theory diagrams of monitoring means on the spot in system of the present invention.
Embodiment
Below in conjunction with embodiment, the present invention is described in further detail, but embodiments of the present invention are not limited to this.
Embodiment
As shown in Figure 1, high voltage electric equipment insulated on-line monitoring system of the present invention comprises monitoring means, the end main control system of standing on the spot, described monitoring means on the spot comprises CPU, wireless communication module, gps clock receiver module, CPU is connected with wireless communication module, gps clock receiver module, and the wireless communication module of monitoring means is connected by wireless network with station end main control system on the spot.As shown in Figure 2, the quantity of monitoring means on the spot of the present invention is more than one, and its concrete quantity is configured according to actual conditions.Each monitoring means on the spot includes probe T1, probe T2, with the current collection circuit that probe T1 is connected with probe T2, voltage collection circuit is connected with current collection circuit, the power amplification circuit being connected with voltage collection circuit, and the driving circuit being connected with power amplification circuit.
When connection, probe T1 and the T2 that pops one's head in are connected with any two circuits of the high voltage electric equipment on bus respectively, and by current collection circuit with its circuit is carried out to current value to voltage collection circuit and magnitude of voltage gathers.
Described current collection circuit is by sensor U; one end and the capacitor C 1 that probe T1 is connected, the other end is connected with probe T2; the N utmost point is connected with probe T1 after resistance R 1, the P utmost point after capacitor C 2 with the diode D1 that is connected of probe T2; the N utmost point and the diode D2 that the P utmost point of diode D1 is connected, the P utmost point is connected with the OUT utmost point of sensor U after capacitor C 3, the diode D3 composition that the N utmost point is connected with the P utmost point of diode D2, the P utmost point is connected with probe T2; Gnd electrode ground connection, the IN utmost point of described sensor U are connected with the tie point of resistance R 1 and diode D1, and the OUT utmost point of sensor U is connected with voltage collection circuit, the P utmost point of diode D3 is connected with voltage collection circuit.Described probe T1 is connected with tested high voltage electric equipment with the other end of probe T2, and current collection circuit is for gathering the current signal of equipment under test.
Described voltage acquisition road comprises: sensor U1, resistance R 2, resistance R 3, capacitor C 4, capacitor C 5; The IN utmost point of sensor U1 is connected with power amplification circuit after capacitor C 5, the OUT utmost point is connected with power amplification circuit after capacitor C 4, gnd electrode ground connection after resistance R 2, and one end of resistance R 3 is connected with power amplification circuit, the other end is also connected with power amplification circuit when being connected with the P utmost point of diode D3.The IN utmost point of described sensor U1 is also connected with the OUT utmost point of sensor U.Voltage collection circuit is for gathering the voltage signal of equipment under test.
Described power amplification circuit is by amplifier PA2, rate amplifier PA1, the resistance R 4 that one end is connected with the positive pole of power amplifier PA2, the other end is connected with the output terminal of power amplifier PA1, be serially connected with the negative pole of power amplifier PA2 and the resistance R of output terminal 5, and be serially connected with the positive pole of power amplifier PA1 and the inductance L of output terminal 1 forms.The negative pole of described power amplifier PA2 is connected with capacitor C 5, output terminal is connected with driving circuit, and the negative pole of power amplifier PA1 is connected with resistance R 3, positive pole is connected with capacitor C 4.Power amplification circuit is exported gathering after the current signal, the voltage signal that come amplify.
Described driving circuit comprises: drive chip U2, diode D4, transistor VT1, resistance R 6, capacitor C 6, capacitor C 7; The N utmost point of diode D4 is connected with the output terminal of power amplifier PA2, the P utmost point is connected with the VIN pin that drives chip U2, the base stage of transistor VT1 is connected with the output terminal of power amplifier PA2, collector through resistance R 6 be connected with probe T2 after capacitor C 7, emitter is connected with probe T2 after capacitor C 6, drive the RT pin of chip U2 to be connected with the tie point of capacitor C 7 with resistance R 6, CS pin and LD pin respectively with pop one's head in that T2 is connected, GND pin ground connection.
After the described sampling of monitoring means on the spot, signal is carried out to digital signal processing, the end main control system of standing is analyzed signal, also can deposit data in database and be used as historical analysis; Can be used for and calculatings of comparing of the historical data of prerun data, continuously monitoring, if error exceeds the warning value of setting, described station end main control system sends some warning information, and on statistical basis, forms preliminary Strategies of Maintenance confession operations staff reference.
As mentioned above, just can well realize the present invention.
Claims (5)
1. a high voltage electric equipment insulated on-line monitoring system, comprise monitoring means on the spot, stand and hold main control system, described monitoring means on the spot comprises CPU, wireless communication module, gps clock receiver module, CPU and wireless communication module, gps clock receiver module is connected, the wireless communication module of monitoring means is connected by wireless network with station end main control system on the spot, it is characterized in that: described monitoring means on the spot comprises probe T1, probe T2, the current collection circuit being connected with probe T2 with probe T1, voltage collection circuit is connected with current collection circuit, the power amplification circuit being connected with voltage collection circuit, and the driving circuit being connected with power amplification circuit.
2. a kind of high voltage electric equipment insulated on-line monitoring system according to claim 1; it is characterized in that: described current collection circuit is by sensor U; one end and the capacitor C 1 that probe T1 is connected, the other end is connected with probe T2; the N utmost point is connected with probe T1 after resistance R 1, the P utmost point after capacitor C 2 with the diode D1 that is connected of probe T2; the N utmost point and the diode D2 that the P utmost point of diode D1 is connected, the P utmost point is connected with the OUT utmost point of sensor U after capacitor C 3, the diode D3 composition that the N utmost point is connected with the P utmost point of diode D2, the P utmost point is connected with probe T2; Gnd electrode ground connection, the IN utmost point of described sensor U are connected with the tie point of resistance R 1 and diode D1, and the OUT utmost point of sensor U is also connected with voltage collection circuit, and the P utmost point of diode D3 is connected with voltage collection circuit.
3. a kind of high voltage electric equipment insulated on-line monitoring system according to claim 2, is characterized in that: described voltage acquisition road comprises: sensor U1, resistance R 2, resistance R 3, capacitor C 4, capacitor C 5; The IN utmost point of described sensor U1 is connected with power amplification circuit after capacitor C 5, the OUT utmost point is connected with power amplification circuit after capacitor C 4, gnd electrode ground connection after resistance R 2, and one end of resistance R 3 is connected with power amplification circuit, the other end is also connected with power amplification circuit when being connected with the P utmost point of diode D3; The IN utmost point of described sensor U1 is also connected with the OUT utmost point of sensor U.
4. a kind of high voltage electric equipment insulated on-line monitoring system according to claim 3, is characterized in that: described power amplification circuit comprises: resistance R 5, power amplifier PA2, resistance R 4, power amplifier PA1, inductance L 1; The negative pole of described power amplifier PA2 is connected with capacitor C 5, positive pole is connected with the output terminal of merit end rate amplifier PA1 after resistance R 4, output terminal is connected with driving circuit, the negative pole of power amplifier PA1 is connected with resistance R 3, positive pole is connected with capacitor C 4, resistance R 5 is serially connected with between the negative pole and output terminal of power amplifier PA2, and inductance L 1 is serially connected with between the positive pole and output terminal of power amplifier PA1.
5. a kind of high voltage electric equipment insulated on-line monitoring system according to claim 4, is characterized in that: described driving circuit comprises: drive chip U2, diode D4, transistor VT1, resistance R 6, capacitor C 6, capacitor C 7; The N utmost point of diode D4 is connected with the output terminal of power amplifier PA2, the P utmost point is connected with the VIN pin that drives chip U2, the base stage of transistor VT1 is connected with the output terminal of power amplifier PA2, collector through resistance R 6 be connected with probe T2 after capacitor C 7, emitter is connected with probe T2 after capacitor C 6, drive the RT pin of chip U2 to be connected with the tie point of capacitor C 7 with resistance R 6, CS pin and LD pin respectively with pop one's head in that T2 is connected, GND pin ground connection.
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| CN201410313813.6A CN104155559B (en) | 2014-07-03 | 2014-07-03 | Insulating on-line monitoring system for high-voltage electrical equipment |
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| CN201410313813.6A CN104155559B (en) | 2014-07-03 | 2014-07-03 | Insulating on-line monitoring system for high-voltage electrical equipment |
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| CN104155559A true CN104155559A (en) | 2014-11-19 |
| CN104155559B CN104155559B (en) | 2017-04-26 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104614629A (en) * | 2015-01-19 | 2015-05-13 | 国家电网公司 | Grounding detection discrimination circuit |
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| CN101359022A (en) * | 2008-08-20 | 2009-02-04 | 东南大学 | Ultra-high pressure circuit monitoring system for solar power generation |
| CN101419263A (en) * | 2008-12-11 | 2009-04-29 | 嘉兴市大桥电力电器厂 | Insulation property on-line monitoring instrument for composite insulator of powerline |
| KR20110094811A (en) * | 2010-02-18 | 2011-08-24 | (주)세오전자 | Power monitoring system using photo-sensor for rfid type |
| CN203178397U (en) * | 2013-04-08 | 2013-09-04 | 吴刚 | Electric leakage detecting system |
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| CN1553206A (en) * | 2003-12-18 | 2004-12-08 | 西安交通大学 | Electric power apparatus external insulative leakage current on-line monitoring system in converting station |
| CN101055302A (en) * | 2007-05-30 | 2007-10-17 | 上海龙源智光电力技术有限公司 | GPS clock signal based high voltage capacitive apparatus insulated on-line monitoring system and its implement method |
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Effective date of registration: 20201217 Address after: 400000 23-15, 169 Hongyuan Road, Jiangbei District, Chongqing Patentee after: Chongqing Zerui Electric Power Technology Co.,Ltd. Address before: Room 505 and 510, No. 298, bachelor Road, Yinzhou District, Ningbo City, Zhejiang Province Patentee before: NINGBO MOMI INNOVATION WORKS ELECTRONIC TECHNOLOGY Co.,Ltd. |
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