摘要:A solution of problems concerning optimisation of power distributions consists in investigating the curves of grid losses as the function of system operating parameters.The solution of a specific group of problems in system stability consists in investigating the curves (characteristics) of active and reactive power transmissions as the function of the same system operating parameters.The node powers and the power losses are equal physical categories,in total,they form the power balance of a system.The authors of this paper attempt to demonstrate that the methods and tools for testing the courses of loss curves and power transmission characteristics can be approximated.