PQvar™ Presentation

PQvar is a new approach to power factor correction and load balancing. The modular design and compact structure make it the ideal solution for active stepless PFC and load balancing in industrial applications and commercial buildings. Compared to conventional PFC systems, PQvar offers a response time of less than 15 ms and a dynamic reaction time of less than 50 µs. It can compensate both inductive and capacitive loads and achieve a power factor of 0.99.

By means of the Advanced Multi Controller (AMC), PQvar can be combined with conventional passive LV-compensation stages. The MV-level is covered by systems for 6 kV, 10 kV and 35 kV, with outputs of between 2000 kvar and 12,000 kvar. All modules are available for 3-phase grids with or without neutral conductors. Depending on customer requirements for output and size, the modules are designed as slide-in units for control cabinets, as wall-mounted units for LV-systems or as control cabinets for MV-systems.

Compensation of reactive power with SVG PQvar Series

SVG PQvar Series load balancing for 3P3W and 3P4W

The 3P3W (three phase three wire) PQvar can balance load currents between phases, the 3P4W (three phase four wire) type may additionally reduce neutral conductor currents. Therefore, PQvar is perfect solution at applications having reactive power requirements along with unbalanced loads, which is the case at e.g electricity distribution lines in rural areas, or different industrial applications.

PQvar at a glance:

Features

• Controllable reactive current source
• Extremely rapid dynamic compensation reaction time of less than 50 µs and a state response time of less than 15 ms
• Active compensation device for usage without capacitors or reactors to avoid resonance conditions
• Compensation of both inductive and capacitive reactive power
• Provides load balancing
• Installation with conventional capacitor banks possible
• Available for low-voltage and medium-voltage levels
• Wide range of compensation outputs from 30 kvar to 12,000 kvar

Typical applications

Applications with the need for rapid reactive power compensation, e.g.:

• Data centers
• UPS systems
• Renewable power generation (e.g. photovoltaics and wind turbines)
• Industrial production machines
• Electrical welding systems
• Plastic industry machinery (e.g. extruders, injection molders)

Safety features

• Highest safety and reliability
• Overload protection
• Internal short-circuit protection
• Overheating protection
• Overvoltage and undervoltage protection
• Inverter bridge protection
• Fan fault alarm