Accurately grasp the damage of direct grounding of the power system, and adopt practical preventive measures to ensure the normal operation of the power system is of great significance. Copper-plated flat steel grounding electrode in the lightning protection grounding network plays an important role. The popularity of general knowledge of lightning protection: when encountering sudden thunderstorms in the construction process, whether the construction workers take refuge in the buildings, garages, carports adjacent to no lightning protection equipment. Whether to take refuge in the stay in the iron gate, iron fence, metal clothesline, overhead metal body and railway track neighbourhood. Whether to hide in the big trees, poles, billboards, all kinds of pylons under the rain.
Power system direct grounding overview: because the communication power supply is a non-polar power supply, power system communication power supply has a real "ground", the ground is also an important concept of the power system an all. In order to system integrity, substations, power plants, all the equipment shell will be firmly connected to the "ground", and expect its impedance is as low as possible. DC power supply "ground" for the DC circuit is only a neutral concept, the ground and communication "earth" is a world of difference. If the DC power system positive or negative pole to the ground between the insulation resistance value reduced to a certain value, or below a certain rule value, then we say that the DC system has a positive grounding fault or negative grounding fault.
Power plant, substation DC system connected to the equipment, circuit messy, in the long-term operation of the process will be due to environmental changes, climate change, cable and connector aging, equipment itself, etc., and the inevitable occurrence of DC system grounding. Especially in the power plant, substation construction preparation or expansion process, because the construction and installation of various problems, it is difficult to avoid leaving the danger of power system problems, DC system is a weak link. The longer the system is in operation, the greater the probability of grounding problems.
DC system grounding of the primary damage: DC system grounding problems, not only on the equipment is unfavourable, and the whole power system an all constitute a threat. Therefore, the regulations on the rules of DC grounding to reach the following conditions, should be suspended on the DC network operations, and to choose to find the address to prevent the formation of two-point grounding. The importance of high-voltage transmission line lightning protection in terms of high-voltage transmission lines, its wider distribution, it is not only the bridge between the substation and the important users, and is also the entire power system in the aorta, it runs an all or not directly related to the reliability of power supply. Copper-plated flat steel grounding electrode transmission lines in the power grid occupies a very important position, want to complete the strong power network can not be separated from the copper-plated flat steel grounding electrode safety and stability.
