AbstractIn the field of protective relay, a dream which is unable to be realized by analogue technology has come true with the advance of computer technology. However, there is still room for the development of a high functional protective system, which makes the most of a merit of digital processing because the present digital relay uses the same principle as an analogous one. The points of proposed theory are that first it uses a lot of data of fault, second uses the first and second Kirchoff laws at the same time which are the starting point of electric circuit theory, and third calculates both fault location and resistance by solving nonlinear simultaneous equations.In this paper high speed calculation for protective relays is achieved by solving a compact matrix using the Newton‐Raphson method.The matrix consists of two sorts of variables (fault location, fault resistance), and the nonlinear simultaneous equation is reduced by definition of new variables.As a result of applying this theory to some real faults, we testified that the fault location error was within 0.1 percent, and the calculation time was less than 5 ms. Therefore we think that this theory has already been in a
📖 افتح في inklap 🔗 DOI 📮 اطلب بحثاً