Qualitrol provides information required by power system operators to understand the dynamic behavior of the power network when there is a sudden change in generation or load, when power swings are present, when stability limits are being reached due to excessive loading or should the system split and form islands.
Sudden Large Change of Generation or Load
The Dynamic Disturbance Recording (DDR) function in Fault Recorders provides information when step changes in generation or load due to unexpected system events cause frequency, power and voltage fluctuations.
Risk of Instability on Heavily Loaded Power Corridors
Two factors can affect stable operation of heavily loaded power corridors, the first is excessive phase angle difference between each end possibly risking breach of the power limit especially if an adjacent circuit trips. The second is the advent of power swinging that can grow in magnitude and cause circuits to trip.
Detection of Islands
Under difficult storm conditions it is possible for part of the network to break away and form an island with its own generation and load. In islands where generation cannot match the load there will be an eventual blackout.
Fault Recorders Sold Globally
Substations Monitored by Qualitrol
Dollars Saved by Customers by Utilizing Qualitrol in the Last Two Years
A specialized user defined detection logic for each channel, monitors permanently the criteria defining a fault and the status triggering the record of an incident. Qualitrol’s extreme digital fault recorders contains a whole library of triggers, each one having its own detection algorithm. The user can choose whichever combination of triggers best suits his needs. For each of these, the triggering levels are remotely programmable.
All input signals are sampled synchronously at a programmable frequency
Each analog input has its own anti-aliasing filter to eliminate undesirable frequencies
As soon as triggering occurs, the recording cycle contained in the pre-fault memory is stored with post-fault recording
Qualitrol’s solutions continue to record during the very harshest events (lightening strikes, power surges, swells and sags, etc) and is the only digital fault recorders with the IEC 61000-6-5 Criteria 1 certification.
Won’t reset during harsh events
Advanced optical isolation, current input isolation and hardware shielding
Increased distances are achieved between electrical inputs to avoid ‘domino’ failure events
Designed specifically for LANs to lower life cycle cost to use a device from installation to product life maintenance, Qualitrol’s solution offers one flexible, upgradeable device with master – slave control.
Complies with IEC 61850 protocol
Scalable architecture that can monitor substation equipment in real time
Peer-to-peer communication reduces wiring costs and provides higher flexibility
Continues to record even during the harshest environmental events
QUALITROL manufactures monitoring and protection devices for high value electrical assets and OEM manufacturing companies. Established in 1945, QUALITROL produces thousands of different types of products on demand, customized to meet unique requirements.