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A thyristor switched capacitor (TSC) is a type of equipment used for compensating reactive power in electrical power systems. It consists of a power capacitor connected in series with a bidirectional thyristor valve and, usually, a current limiting reactor (inductor). The thyristor switched capacitor is an important component of a Static VAR Compensator (SVC), where it is often used in conjunction with a thyristor controlled reactor (TCR). Static VAR compensators are a member of the Flexible AC transmission system (FACTS) family.
A thyristor switched capacitor device and a control method and apparatus thereof
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.
Owner:GUANGZHOU POWER SUPPLY BUREAU GUANGDONG POWER GRID CO LTD