CoDiS PQ system provides permanent electrical quantities vector monitoring and generator (motor), block transformer, switchgear and grid electrical transients recording. The system includes recorded transient waveforms analysis toolbox. It is usually deployed as part of CoDiS DM vector diagnostic monitoring (along with vibration, air gap, and hydraulic quantities).

It is used to correlate electrical conditions with mechanical.

CoDiS PQ basic electrical values are measured using Veski VC33 (multi-channel) or VC11 (single channel) voltage and current measurement transmitter blocks, which are a part of the standard system configuration.

Most relevant measurements alongside power quality is electrical load angle.

Electrical Load Angle

Electrical Load Angle (δ) is the angle between the induced EMF and terminal voltage, or the angle between the stator and rotor magnetic fields.. The generated power is directly proportional to the sine of this angle.

Load Angle (δ) is also a direct representative of magnetic field torsional stiffness inside the air gap as well as the generator stability in operation (e.g. out of step). On-line measurement of load angle (static and dynamic) is of great importance to determine the actual working parameters of the generator when combining with on line capability diagram (P-Q diagram).