1、 TM77 2002 11 60 TI MSP430 1.8 3.6V RS-485 MAX1480B RS-485 MAX1480 MSP430 MAX1480 MSP430 2On-line Monitoring of HVCB Abstract HVCB on-line monitoring is essential for predicting maintenance and as a supplement to the traditional off-line preventive maintenance is the key factor of its reliable opera
2、tion. In fact, the faults on HVCB account for over 60 percent both in number and duration of all the faults occurring in a substation. Therefore, on-line monitoring of HVCB could significantly improve power supply reliability and greatly reduce the expense for regular overhaul. In this thesis, the i
3、nspecting methods of HVCB mechanical characteristics are discussed. According the shut-off times of HVCB at rated short circuit given by manufacturer, the contacts life loss can be calculated for each operation, and the remaining life can be forecast. In this thesis, an indirect method is proposed f
4、or determining the main contact temperature based on the breaker shell temperature, air circumference temperature and breakers heat resistance, and furthermore, determining the main contact resistance provided the load current is know. The on-line monitoring is implemented with MSP430, a new Single
5、Chip Microcomputer by Texas Instrument, with its lower supply voltage range of this chip 1.8 3.6V is well treated. In the design of communication module, interfacing problem caused by different voltage supply levels (MAX1480 and MSP430) is carefully solved, and a connection scheme is devised in this
6、 paper as well. keywords: HVCB On-line Monitoring Mechanical Characteristic Touch Electricity Endurance Touch Temperature 1 1 1 1.1 . 1 1.1.1 1 1.1.2 2 1.1.3 2 1.2 . 3 1.2.1 3 1.2.2 . 4 1.3 . 4 2 6 2.1 . 6 2.1.1 6 2.1.2 7 2.1.3 . 10 2.1.4 . 12 2.1.5 . 13 2.2 14 2.2.1 . 14 2.2.2 . 21 2.3 24 2.3.1 . 2
7、4 2.3.2 29 3 . 31 3.1 31 3.2 MSP430 . 33 3.3 34 4 . 41 4.1 41 4.1.1 WTD 41 4.1.2 A/D 42 4.1.3 . 43 2 4.1.4 TA TB . 43 4.1.5 DS1820 . 44 4.2 45 4.2.1 . 45 4.2.2 . 46 4.3 47 5 49 5.1 RS-485 . 49 5.2 MSP430 . 49 5.3 RS-485 MAX1480B. 50 5.4 51 5.4.1 . 51 5.4.2 . 51 5.4.3 . 51 5.5 52 6 53 54 . 55 1 1 60
8、1 24 GIS GAS INSULATED METAL ENCLOSED SWITHGEAR GIS (1) (2) GIS 1.1 1.1.1 1951 John S.Johnson 5 60 1 2 70 1975 70 80 2 80 1985 ” 1.1.2 1 2 3 4 1.1.3 1 2 3 4 5 6 7 3 1.2 1.2.1 GIS 90 1 4 6 SF6 GIS 60 GIS 110KV GIS 1971 1973 GIS GIS 90 4 1992 GIS 1995 CBA-1 GIS 1.2.2 1 2 3 4 5 SF6 6 7 IMS ION MOBILITY SPECTROMETER 6 9 1.3 1 2 5 3 4 TI MSP430 10 11 1.8-3.6V 5 RS-485 MAX1480B 12 13 MAX1480 MSP430 MAX1480 MSP430 6 2 2.1 80% 14 2.1.1 80 90 90 DOBLE TR-3000 -80 MCS-51 MCS-96 -80 MCS-51 90 8031 2 7 0.1ms 1mm 0.01m/s 14
