This design requires fewer harmonic filters enabling a compact, optimized SVC layout. Model Based Design utilizes a graphical interface for the design stage and translation of control models with automatic code generation for all testing and verification stages.
Thyristor valves are used for controlling reactive power in Static Var Compensators. Thyristor Controlled Reactor TCR valves are used to control the effective fundamental frequency current in the reactors by controlling the conducting ratio through varying the firing angle of the thyristors.
Thyristor Switched Capacitors TSC bank valves are used for switching capacitor banks on or off according to the reactive power demand on a time scale of several periods or more. GE has designed, delivered and supports over Static Var Compensator Systems globally in a broad range of applications and environments. The below details are a selected representation of recent projects, a complete reference list is available upon request. GE Advantage. For the SVC solution this means an increased level of safety and availability in operation.
The SVC Classic control provides extremely fast response times of 30 to 40 ms inutility applications and down to 10 ms for industrial load compensation tasks. The simplest configuration combining a TCR with filter circuits is typical in industrial applications. But — owing to modular design and individual adaptability — the SVC Classic also offers suitable concepts for more complex requirements in grid and industry applications: a tailor-made control concept is combined with the appropriate selection of type and number of parallel branches of different characteristics.
The core functionality of an SVC Classic is the ability to dynamically adjust inductive reactive power with a thyristor controlled reactor TCR. This adjustment, performed automatically by the control system based on the dynamic grid requirements respectively the load characteristics, results in the stabilizing effect of the SVC Classic. These harmonics need to be dampened by individually tuned filter circuits.
Filters circuits enhance the capabilities of the SVC Classic. To absorb harmonics prevalent in the system or generated by the TCR, they are tuned to specific frequencies.
Number and frequency characteristics are individually selected. Where necessary, high- and low-pass filters further improve effectiveness. A thyristor switched capacitor TSC is used to inject capacitive reactive power step by step, if called for by transient phenomena during switch-on. Instead of being controlled continuously, they are switched on and off when needed.
In case of disturbances during dynamic conditions, SVC provides the necessary support to the grid. The SVC Classic is a highly dynamic, fast, and reliable alternative to conventional mechanically switched reactors and capacitors.
A sophisticated control with algorithms tailored to the respective application allow its use to either dampen power oscillations in the grid or for fast load compensation. Voltage control to stabilize a power grid or voltage stabilization to improve the efficiency of an industrial power distribution and the loads connected are tasks for which the SVC Classic is an attractive answer.
Mechanically switched capacitors MSC and mechanically switched reactors MSR the most economical power compensation devices. Ensuring safety, reliability, and availability for flexible AC transmission systems throughout the entire lifecycle. Discover our broad portfolio of innovative products, systems and solutions for efficient, reliable, and flexible power transmission.
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