POSITION OF THE DISTRIBUTION NETWORK IN THE EES AND BASIC CHARACTERISTICS OF THE DISTRIBUTION NETWORK, STRUCTURE AND CONFIGURATION OF DISTRIBUTION NETWORKS AND SUBSTATIONS, ELEMENTS OF THE DISTRIBUTION NETWORK, ELECTRICAL PARAMETERS AND SUBSTITUTE SCHEMES OF THE ELEMENTS OF THE DISTRIBUTION NETWORK, CALCULATION OF STATIONARY STATES, LOW VOLTAGE NETWORKS, COMP ENERGY OF REACTIVE POWER , VOLTAGE REGULATION IN THE DISTRIBUTION NETWORK