Journey of Power System Operation

  Monitoring of Angular Separation in Power system : Basic concepts In an AC power system, power angle can be monitored by measuring voltage phasor or specifically say then its positive sequence voltage angle measurements. Positive sequence components represent the balanced power system.  In view of that, its angle is used for angular separation monitoring purposes as even during disturbance it provides a good overview of the angular separation between two nodes of the system. Now let us learn about the methods for angular separation (power angle) monitoring in an AC power system.  Grid operator across the world uses in general five ways for power angle monitoring. These methods have come over time and are being utilised by system operator based on technological advancement in area of instrumentation, computing and communication. When we are talking about usage by the system operator then it means that angle of power system measured from a substation located far acros...

Importance of angle in Power system Operation Angle is one of the important quantities that determine the various aspects of the power system. Different types of angles provide vital information ranging from the power factor, direction of power flow, stress and stability of power system, generating plant stability etc. In general, power system engineers come across three kinds of angles : Phase Angle Torque Angle (Load Angle) Power Angle Each of these angles have their own roles in providing input to power system engineers and operators in controlling and managing the grid. Better the control is in hand, more safe is power system. During disturbance, these angles vary significantly and automated/manual action are utilized to ensure that they recover back within safe operating limit. Other angles in power system are related to DC system which are firing angle, commutation angle, advance angle, extinction angle and margin angle. Source : EPRI Power system Dynamic T...