| 摘要 |
FIELD: electrical engineering.SUBSTANCE: invention relates to electrical engineering and may be used in circuits allowing to accumulate energy of direct current to supply auxiliary systems of DC power accumulators. DC power accumulator (2) including auxiliary systems (68) operates in one or more different modes: in standalone, isolated and normal mode. In standalone mode the first controller (24) uses a voltage request signal (VACr), indicating a desired AC voltage on AC terminals of DC/AC voltage converter (4), for control of semiconductor switches of direct DC/AC voltage converter (4) to achieve the desirable level of AC voltage corresponding to the voltage request signal (VACr). Voltage request signal (VACr) is derived from comparison of voltage feedback signal (VACfb) and the second voltage request signal (VACsr) which is set to ensure the required AC voltage for auxiliary systems (68) of DC power accumulator. Second controller (46) uses a current request signal (Ior), indicating the desired value of current in DC circuit, for control of semiconductor switches of direct voltage converter/direct current (14) in order to achieve the desired value of current in DC circuit corresponding to the request signal current (Ior). Current request signal (Ior) is derived from comparison of the voltage request signal in DC circuit (VDCr), indicating the desirable voltage in DC circuit, and voltage feedback signal in DC circuit (VDCbus).EFFECT: technical result is improvement of reliability of supply of auxiliary systems of DC power accumulators.20 cl, 7 dwg |
