According to the equal area rule of the stable control in the simple power system, since the fast excitation can only act on the braking area, the effect is not as fast as the removal of the fault, and the rapid recovery of the fault reduces the acceleration area and increases the braking. The area has a double effect. Electric brake electric brake refers to short-time input of a resistor on the sending power bus on the sending power plant bus after the fault is removed, so as to absorb the acceleration energy obtained by the generator set due to the fault, so that the generator set can be quickly decelerated after the fault is removed, thereby reducing The maximum swing angle achieves the goal of increasing the level of stability. This method is typically used in large hydropower plants, and the key issue is that the brake resistor must be quickly turned on and exited on time. The use of electric brakes requires an additional device, but since it is short-lived and the braking energy can be controlled, good control can achieve better results with less adverse side effects on the system. It is a trouble to cut the machine easily for short-term disturbances. Therefore, the priority braking and cutting machine control method should be used as much as possible to ensure that only permanent disturbances are performed.
Galvanized steel sheet is carbon steel sheet coated with zinc on two sides. the process used to do this is known as the continuous hot dip process. this process results in a layer of zinc which adheres tightly to the base steel and has a spangled, or snowflake-type, appearance. The layer of zinc acts as a sacrificial coating.
Galvanised steel is mild steel with a coating of zinc The zinc protects the steel by providing cathodic protection to the exposed steel, so should the surface be damaged the zinc will corrode in preference to the steel Galvanised steel is one of the most widely used products, used extensively in the building sector, automotive, agricultural and other areas where the steel needs to be protected from corrosion. Galvanized Steel Sheet, Hot Dipped Galvanized, Galvanized Sheet Coil, Gi Sheet Shandong Guanzhou Iron and Steel Group Co., Ltd. , https://www.guanzhouiron.com
Hot-Dip Galvanizing or HDG is a process in which zinc bonds to steel at the molecular level to produce a four-layer corrosion-resistant finish. The first three layers are zinc-iron alloy layers that are actually harder than the base steel. The fourth or top layer is pure zinc.