FIELD: electricity.
SUBSTANCE: invention relates to electrical equipment. Result is achieved by device (1) and a method for controlling the stability of local network (3). Local network (3) comprises a plurality of outgoing circuits (41, 42,..., 4m), each outgoing circuit (41, 42,..., 4m) has at least one load (5) and/or at least one decentralised energy generation system (6). By using on-load tap-changer (14), an output voltage of local network transformer (10) is adjusted. Unit (16) for measuring current, connected to at least one of the plurality of outgoing circuits (41, 42,..., 4m), and a unit (18) for measuring voltage, connected to busbar (8) of local network (3), are arranged in transformer housing (20). From the plurality of outgoing circuits (4, 41, 42,..., 4m) only critical outgoing circuits (42, 43) are connected to unit (16) for measuring current.
EFFECT: increased efficiency and reliability of maintaining the overall stability of the local network within specified limits.
11 cl, 6 dwg
