3 results about "Thyristor switched capacitor" patented technology

The invention relates to the technical field of power system reactive compensation, and discloses an intelligent integrated hybrid dynamic reactive compensation control system which comprises an execution unit and an intelligent control unit. The execution unit comprises a static synchronous compensator unit and a thyristor switched capacitor unit; the intelligent control unit comprises a system state monitoring module, an impedance parameter feed-forward mapping table storage module and an active transient pre-suppression coordinator. A three-stage handover control process is executed through an active transient pre-suppression coordinator, a static synchronous compensator unit is controlled to output compensation power in advance before a thyristor switching capacitor unit acts, and reactive power impact at the switching moment is actively stabilized; meanwhile, according to the new system impedance state after switching, the optimal control parameter set is retrieved and loaded from the mapping table, and the problem of mismatching of the control parameters is solved. According to the invention, high-efficiency cooperation of high-capacity step compensation and rapid continuous adjustment is realized, and the voltage stability of the power grid is improved.

This application discloses a thyristor-controlled capacitor switching device and its control method and equipment, belonging to the field of power grid safety devices. The device includes: a capacitor and at least two reactors; the reactors are connected in series with each other and form a reactor branch in series with the capacitor; each reactor corresponds to a first reactance rate; at least two of the first reactors have an inductive coupling relationship; multiple first reactors with inductive coupling are combined to form a reactor group; each reactor group corresponds to a second reactance rate; each reactor is connected in parallel with a switching element, so that by controlling the conduction state of each switching element, a single reactor or a single reactor group can be connected to the reactor branch, thereby realizing the reactance rate switching of the thyristor-controlled capacitor switching device. This application can improve the reactance rate switching diversity of the TSC device without increasing the scale of the equipment.

The invention discloses a novel topology of a rotary power flow controller cascaded with a static var compensator and a control method, and belongs to the technical field of flexible interconnection configuration of a power distribution network, the novel topology comprises a rotary power flow controller RPFC and a static var compensator SVC, the RPFC is used as a flexible interconnection device and is integrally connected in series on a tie line, and the SVC is connected in parallel to a grid connection point of the RPFC; the RPFC is composed of two groups of rotating phase-shifting transformers RPST, and the two groups of RPST adopt a structure that rotors are connected in parallel and stators are connected in series; the SVC is formed by connecting a thyristor controlled reactor group TCR and three thyristor switched capacitor groups TSC in parallel; the TCR is formed by connecting a pair of antiparallel thyristors in series with a group of inductors, and the TSC is formed by connecting a pair of antiparallel thyristors in series with a group of capacitors. According to the invention, the reactive power compensation device-SVC is accessed to the flexible interconnection node to bear the effect of a reactive power supply so as to reduce the voltage deviation of the access point, the power flow regulation capability of the rotary power flow controller is fully released, and the regulation capability of the rotary power flow controller is effectively improved.