Hybrid Flow Controller
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Joined: Oct 2010
16-10-2010, 12:23 AM
Here, a hybrid flow controller (HFC) is introduced as a part of the of flexible ac transmission system (FACTS) controllers for steady-state and power-flow control of power transmission lines. The HFC is a hybrid compensator that provides series and/or shunt compensation. The major mechanical components of the HFC are:
-a mechanically switched phase-shifting transformer
- a mechanically switched shunt capacitor
-multimodule, series-connected, thyristor-switched capacitors and inductors
This article describes the steady-state operation, single-phase equivalent circuit, power-flow model, V vs I and P vs Q characteristics of the HFC.
for an interconnected power system, steady state and dynamic power-flow control, particularly under heavily loaded system conditions is a prerequisite. Various FACTS controllers are available in the documentation. The new HFC is discused in the following details:
-steady-state principles of operations
-single-line equivalent circuit and power-flow model is developed
-steady-state power-flow control characteristics is investigated
PRINCIPLES OF OPERATIONS OF HFC
An HFC is comprised of:
-a PST capable of injecting a lead/lag, quadrature-phase voltage
-multimodule TSSC system which can insert a variable series capacitive reactance, in discrete steps.
-multimodule TSSR system which is capable of inserting a variable series
inductive reactance, in discrete steps.
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