Modular Static VAR Generators Boost Efficiency and Ensure Load Balancing
TDK Corporation presents EPCOS PQvar™, a modular static var generator for active stepless power factor correction and load balancing in industrial grids and large commercial buildings. With a fast response time of less than 15ms and a dynamic reaction time of 50µs, PQvar offers significantly faster compensation than conventional systems.
The system is suitable for the active compensation of both inductive and capacitive loads and can achieve a power factor of 0.99. At the low-voltage level PQvar is designed for 400V and 690V supply systems. In these voltage classes individual modules with outputs of between 30kvar and 200kvar are available, as well as systems for up to 880kvar per compensation cabinet.
Through the targeted use of power factor correction systems such as PQvar, energy efficiency can be significantly improved. On the one hand, the power losses in the electrical transmission and distribution network are significantly reduced and, the CO2 emissions for generating this wasted power are avoided.
On the other hand, transformers and the power transmission and distribution networks can be used more efficiently.
Using Advanced Multi Controllers (AMC), the PQvar system can be combined with conventional passive low-voltage compensation stages. The medium-voltage level is covered by systems for 6kV, 10kV and 35kV, the modules being designed for outputs of between 2000kvar and 12,000kvar.
All modules are available for 3-phase grids with or without neutral conductors. Depending on the output and size, the modules are designed as slide-in units for control cabinets and systems for wall mounting (low-voltage) or as control cabinet systems (medium-voltage).
Main features and benefits
- Short response time of <15ms;
- Dynamic response time of 50µs
- Available for the low-voltage and medium-voltage levels
- Wide range of compensation outputs from 30kvar to 12,000kvar
