Research on Security Rectification Strategy of the Generators of Electrical Power Systems Based on Lattice Order Rough Sets Theory

摘要

In electrical power systems, due to the uncertainties of loads and corresponding power varieties, power systems tide currents will exceed over the allowed boundaries. As a result, power systems security suffers threat. Conventionally, the methods to solve the problem are single circuit/section security rectification based on sensitivity principle, whose process is quite complicated and low efficient, and is not easy to be understood. Therefore, the paper proposes a novel security rectification strategy based on partial/lattice order rough sets theory. The methods firstly establish the positive, the negative and the boundary universe of generators modulation schemes in accordance with sensitivity principles, then, in the upper approximation space of the adjustable generators, through applying partial order relation of rough sets, maximal ideal set of adjustable generators is achieved. Maximal ideal set is constantly modulated according to sensitivity varieties of the generators, and therefore can better adapt to dynamic variety environment. Being used to security rectifying strategy of power system generators, the practical results show that the method is very effective.