| 摘要 |
FIELD: electric engineering, possible use for protection of electric devices and electricity transfer lines in high voltage networks with isolated neutral. ^ SUBSTANCE: device for compensation of one-phased capacity closing currents and for limiting internal overvoltages in high-voltage networks, contains three-phased force transformer, primary winding of which is connected in accordance to "star" circuit to external neutral and by means of commutator is connected to powering system of buses, while secondary one - in accordance to circuit "open triangle", one-phased voltage transformer and reactor between neutral and grounding device, current transformer, resistors, main and bridging commutation devices, each one with individual control circuit. Device additionally contains second reactor, connected serially to first one with simultaneous parallel connection to clamps of secondary winding and bridging commutation device, while reactors are connected by means of main commutation device to the neutral, and through current transformer to grounding device, and are bridged by resistors connected in parallel, one resistor has linear characteristic, another one - nonlinear characteristic, circuit for controlling main commutation device contains current relay and intermediary relay in secondary circuit of current transformer, control circuit of bridging commutation device contains voltage relay and intermediate relay in secondary circuit of one-phased voltage transformer. ^ EFFECT: increased efficiency of operation of protective device, provision of magnetic compatibility with previously installed electric equipment on sub-stations and electricity transfer lines. ^ 4 cl, 1 dwg |
