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Dołączył: 29 Paź 2010
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 Wysłany: Nie 22:57, 05 Gru 2010 Temat postu: tory burch shoes Automatic generation control and |
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Automatic generation control and treatment can not work because
On both an AC voltage (30V or so volatile), and remote communication power is +24 V, all believed to be passive and remote sharing of a power supply. Remote Communication in one by one for each J Electric Safety Technology Volume 5 (2003 2) conducted a separate test, did not find about 30V AC power ground is also the host and good. RTU power output of each branch of inspection, found in the power output of +24 V when the power supply has several branches around l0V AC voltage. In addition to the letter for the remote branch power use, while a branch of the power used for the modem, the modem has received a total amount of 3, the first one is the province of downstream data transfer via modem to the local serial interface front-end functions, 2 one is RTU data transfer via modem to the provincial EMS system, the first three is the RTU to transfer data via modem to the EMS system. Modem will be separated from the host to host a separate test, the digital board interface, the output current normal point of failure found. 3-way on the modem and then the data were measured one by one,[link widoczny dla zalogowanych], found that local features of the road in front-end to the modem when the AC load and is about 80V. The serial port of the modem to the RTU-to-ground voltage to ask about a 50V, based on a front-end server and workstation between the shell and ground AC voltage measurement, the measured AC voltage up to l00V so. Then to front-end server and workstation chassis ground, and then three for the FBI, everything is normal. Analysis of the reasons, mainly the following points: (1) As much motivation before and after booster station house,[link widoczny dla zalogowanych], room above the mezzanine cables, and although anti-static floor room, but no anti-static grid, which is the computer case charged The main reason usually large static image on a computer screen shake. (2) RTU power supply +24 V power output although a few, but many roads are parallel,[link widoczny dla zalogowanych], and if the failure would affect the work of other equipment. (3) Although the total power ground, but to the computer's power is only two-phase, there is no ground in this phase. (4) RTU in the course of the CPC appeared 4a 4 telesignalling fuse, RTU 3 times the power of protective action, front-end burn 3 serial board, modem 2 times the chip temperature is too high and damage. These cases do not pay attention to. 2 preventive measures (1) RTU output power system to separate DC power supply with another one to replace the existing remote communication power. (2) phase on the computer power ground, the other will cover all the computers in the engine room ground, and carefully check the original ground, replace the failed ground. (3) between the front-end interface board and modem installation of optical isolator to prevent static burn the serial modem and front-end board. Conditions permit, to the room equipped with anti-static grid. (4) team members to enhance safety awareness education. These measures, it has been all equipment operating normally. (Received date :2002-12-12) one by one strong Kang Ho (the power company Haikou, Hainan, Haikou 570001) GIS knife operation malfunction, resulting in a negative Hela switch, great harm. Hainan power system is introduced 220kVGIS, for example,[link widoczny dla zalogowanych], to run the GIS Knife mal issues were discussed. 1als malfunction after 2001-07-13T23: 31, Hainan Ma village power plant malfunction occurred 220kVGIS knife bus short circuit caused by the accident. 220kV main wiring system (part of) On Figure 1, the electrical bus to run officers down operational task, I Ⅱ home run down the mother load, close the QL2, the pull-QL1 not open when you pull, then I intended to restore the mother in the L line running, will have been opened after the close of QL2, QL1 and automatically opened (with a negative Hela knife), causing bus short circuit accident. Figure 1220kV main wiring system (part of) 2GIS knife Misaction (1) GIS knife is mainly due to malfunction of a problem blocking logic circuits, circuit components are not reliable or damage. (2) switch, the operating power to the air knife switch operation in GIS intervals in the \Electrical safety regulations \Operation, the knife does not play a breaking normal load currents and fault short circuit current task, in the operation mode is determined, the switch has to only play the role of current path, the corresponding position should be maintained, once mistakenly pull (including human error and pull blocking logic circuit fault caused an automatic error pull together), will cause serious consequences. Knife to prevent malfunction of the operation should be opened Switch Operation power air switch for good. (3) an operating power supply switch control multiple air-knife (including a knife) the way reasonable. Shown in Figure 1,[link widoczny dla zalogowanych], L line by the mother Ⅱ I run down the mother, should be combined
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