| When charged the closed electrical circuit tripping moment, if the gate circuit in the current or voltage reaches a certain value, an arc is generated at the loop is disconnected.The arc is a physical phenomenon in the electrical switch, particularly the high pressure, high current power supply device, the generation of the arc, but having a lower operating voltage, the two aspects of the role of electrical damage caused by delay circuit breaking.When the transmission line will cause the insulator strings Flashover arcing being struck by lightning, the powerful arc triggered insulator string of explosions and the tripping of the transmission line, as soon as possible to extinguish the gap arc cut off the power frequency freewheeling can effectively protect the power system many electrical equipment to improve the reliability of the power supply as well as reduce the line rate of lightning trip has a very important significance.The thesis tries characteristics of the arc, the the arc arc construction process to start and combined with the explosion of high-speed air flow on the arc of the overhead power line subjected to lightning discharges cause arcing, explosion airflow to strengthen accelerate the interrupter effective lightning feasibility study. The full text can be divided into four parts:The first part is the characteristic of the arc and the construction model of the arc;The second part of the establishment of an explosion arc model;he third part of the arc by the possibility of high-speed explosion airflow blown rear reignition, the feasibility of the interrupter.The fourth part is the practical application of the test report.Overhead power line explosion airflow interrupter law against lightning mastered the principles of gas blowing interrupter arc model as well as the calculation of the explosion interrupter model, summed analyzed the feasibility of deep understanding of effective lightning protection safe operation of the power systemimportant and realistic significance. |
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