The invention relates to a coordinated
voltage control method for an alternating-current and direct-current
hybrid power
system, and belongs to the technical field of
automatic voltage control for power systems. The coordinated
voltage control method includes acquiring key operating measured values of a direct-current
system and a near-field alternating-current
system of the direct-current system; judging a current coordinated control state of the power system according to the operating measured values; performing
tertiary optimal control computation and coordinated secondary
optimal control computation on an integral
power grid according to the coordinated control state; issuing computation results to systems of substations. The coordinated
voltage control method has the advantages that an AVC (
automatic voltage control) system can assuredly instantly perform the
tertiary optimal control computation and the coordinated secondary optimal control computation on the integral
power grid under the condition that operating
modes of the direct-current system and the near-field alternating-current system are changed greatly, so that computation control strategies of the AVC system are assuredly coordinated with a current working condition of the alternating-current and direct-current
hybrid power system, and unreasonable reactive flow in the power system can be prevented; the coordinated
voltage control method can be integrated in the AVC system which is operated in fields, so that the voltage safety level of the alternating-current and direct-current
hybrid power system can be enhanced.