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On December 9th, the State Grid Tianjin 500kV lined up in the first line and applied for PRTV. In the past few days, there has been a wide range of hazy weather in Tianjin. The State Grid Tianjin Inspection and Repair Company has comprehensively strengthened special inspections of the main equipment of the power grid, and at the same time prepared for the emergency repair of power grid accidents in inclement weather, it actively applied PRTV. Ensure that Tianjin's main power grid is safe and reliable.
It is understood that the impact of haze weather on the power system is reflected in two aspects: First, the impact of fog, that is, the influence of humidity, the impact of which is reflected in the external insulation surface of the power system equipment caused by moisture, the outer insulation level dropped, resulting in pollution flash Phenomenon; the second is the influence of helium, that is, the influence of pollutants in the atmosphere, the impact of which is reflected in the increase of pollution degree on the external insulation surface of the power system equipment. After being superposed with a high-humidity environment, it may also cause pollution flash. In order to prevent hazy weather from adversely affecting power grid equipment, State Grid Tianjin Maintenance Co., Ltd. has advanced preparations and actively carried out clean-up work on insulators of power equipment, and scheduled 73 cycles of 220 kV and above in the main power grid of Tianjin. Substations and more than 3,000 kilometers of high-voltage transmission lines applied PRTV coatings and other measures. Immediately after the occurrence of haze weather, a special inspection responsibility system under bad weather was implemented. In combination with the emergency treatment plan for pollution flashover accidents of power grid equipment, a comprehensive inspection of the insulator and anti-fouling paints of substation equipment and the sound of corona discharge was conducted to ensure the electrical equipment and Grid security.
State Grid Tianjin Maintenance Co., Ltd. will adopt active and effective measures to effectively reduce the possibility of pollution flashover accidents in power grid equipment, minimize the impact of hazy weather on the main power grid in Tianjin, and ensure the safe and reliable power supply of the Tianjin main power grid.
Background material: Pollution flash refers to the contamination attached to the insulating surface of electrical equipment. In wet conditions, soluble substances gradually dissolve in water, forming a conductive film on the insulation surface, which greatly reduces the insulation level of the insulator and acts on the power field. There is an intense discharge underneath.
PRTV anti-pollution flash coating is a durable, in-situ formed anti-fouling flash composite coating for external insulation of power equipment. It is a new type of electrical functional material that can effectively eliminate the hidden dangers of external insulation and pollution flashover in electrical equipment such as substations and transmission line insulators.
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