PQC-HPFC Hybrid Static Var Generator
HPFC (Hybrid Var Generator or Compensator) integrate Thyristor Switched Capacitor (TSC) and Static Var Generator, modular design, with dynamic compensation functions of reactive power compensation, harmonics compensation, voltage fluctuation, load unbalance.
Also, this HPFC has high cost performance, and without overcompensation or under compensation.Comparing to traditional SVC from economic, technical and performance perspectives, YTPQC-HPFC use passive capacitor modules coarse tuning firstly, then fine tuning by active SVG module. YT Hybrid Static Var Generator has high reliability, safety and economic, TSC module can continue work when SVG module failure.
PQC-HPFC Advantages
· Single HMI Enables Simple and Visual Operation
· Independent Logic Integrated Within Each Module
· Ultra-fast reactive current compensation for transient or cyclical loads
· Infinitely variable control
· Instantaneous response for inrush support
· Independently compensates each phase
· Heavy duty dry capacitors provide no risk of fluid leakage, no environmental pollution and no need for drip pans
· Detuned iron core reactors prevent resonance
· Step less power factor correction
· IGBT based power electronic technology
· Best-in-class harmonic cancellation up to 50th harmonic and less than 3% THDi
· Energy efficient 3-level IGBT inverter technology
PQC-HPFC Work Method
Connected in parallel with the supply or load, Hybrid Active Power Factor Correction units provide a dynamic controlled current source capable of matching any waveform in real-time.
PQC-HPFC units predominantly utilise the integrated capacitor bank steps to provide the fundamental capacitive reactive power, with the dynamic compensation (capacitive or inductive) provided by the in-built SVG. The HPFC unit’s ability to address reactive power between the capacitor bank steps removes the requirement for differing capacitor bank sizes and results in a smooth output within the network.
Integration of both technologies within the HPFC unit allows the administration of harmonic filtering, voltage variation reduction, flicker mitigation and balance of supply simultaneously.
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Hybrid Static Var Generator have been designed with two distinct operational modes: Ultra-fast and PFC mode.
a. The ultra-fast operational mode has been designed to allow rapid ‘open-loop’ reactive power compensation. The ultra-fast operational mode reduces minimum step switching times from one second (as observed within PFC mode) to <0.2 seconds.
b. PFC mode provides a more traditional operational mode, allowing operators closed loop system control.
Combining the technical advantages of PQC Static VAR Generators (SVG) with the cost effectiveness of traditional contactor or thyristor switched detuned filter capacitor bank technologies ensures an economical, step-less, real-time compensator operated through a single Human Machine Interface (HMI).
End User's Benefits
· Lower energy costs
· Increase system capacity
· Improve product quality and productivity
· Increase system reliability
· Reduce operating expenses
· Lower substation equipment and bussing cost
· Reduce repair and maintenance cost
· Quick return on investment
