The solution of optimisation problems in the operation control of the electric power system

Deregulation and opening of the market with electric energy increases the interest of all subject involved in the market, thus also of the operators of the electric power system (EPS), in the highest efficacy of their activities. While optimising the operation of the EPS, selected quantities (e.g. active and reactive powers of power plants, transformer tap positions, voltage values in nodes and so on) are adjusted either in the process of preparing the operation or directly in real time with intention to optimise the goal function (consumption of fuel during electricity production, power losses and so on). During solution of optimisation of electric power system operation it is important to formulate the optimisation problem correctly and also to choose a suitable mathematical method (classical eventually alternative) to solve problem. The article presents the mathematical formulation and demonstrations of the solution to the problem of Economic dispatching control of power plants and the problem of Active power losses minimisation in electric power system.