OPERATION ALGORITHM OF THE DEVICE FOR DIVIDING AN ELECTRICAL GRID

Abstract

The article presents the protection of 0.4 kilovolt transmission lines from distant single-phase short circuits by circuit breakers installed at the beginning of the lines on the example of one of the electrical grids. The necessity of protecting the lines from this short curcuits is justified. Based on the literature review, the article describes the means for managing the structure of electrical grids, including means of sectioning. One of these devices is a device for splitting the electrical grid. (Research purpose) The research purpose is developing an algorithm for the operation of an electrical grid sectioning device implementing a method for protecting a power line from distant single-phase short circuits and overloads. (Materials and methods) The analyzed literature sources describes the protection of power transmission lines. Authors used general scientific methods, methods of computer science in terms of algorithms of work. (Results and discussion) The article presents the method for protecting a power transmission line from distant single-phase short circuits and overloads using a grid sectioning device, and a block diagram of its structure. Authors developed an algorithm for the operation of the electric grid sectioning device implementing the proposed method. The implementation of the method with the grid sectioning device makes it possible to ensure the reliability of electrical line and power supply to consumers. (Conclusions) The implementation of the developed algorithm of the grid sectioning device with the protecting power lines from distant single-phase short circuits and overloads makes it possible to ensure protection from these modes of the entire length of the line, evaluate the reasons for disconnecting sections of the line and inform the grid dispatcher about it. The use of an electrical grid sectioning device is justified in lines where there are no critical consumers, but the lines are not protected from distant short circuits and overloads.