Overvoltage’s stress the insulation of the equipment and often lead to equipment failure. ETA module is designed to perform the transient and dynamic overvoltage studies for the power system arising out of switching operations, faults and lightning surges.
The key features of the module are :
- Computation of highest discharge currents and energy stresses for the protective equipment
- Assessment of withstand levels of currents and voltages for protected equipment
- Supports energization of lines, transformers and shunt elements
- Computes Over voltages during fault inceptions and clearing of faults
The simulation is useful for appropriate insulation co-ordination, and design of protection schemes. Simulation studies also facilitate investigation of interference due to communication lines, hazardous coupling effect to personnel, livestock, and equipment.
Series capacitors are often used in long transmission lines, at appropriate locations, to enhance the line loadability. Sometimes these series capacitors excite low frequency oscillations due to Sub Synchronous Resonance (SSR), and damage turbine-generator shafts.
Sub Synchronous Resonance computes the oscillations in current, voltage and generator torque at Sub Synchronous frequencies. The Nyquist plot enables the interaction between the designated generators and the network under consideration and defines the stability of the power system.
The key features of the module are :
- Frequency response method
- Multiple synchronous machines
- Series compensation in transmission network
- Detailed modeling of machine shafts and control loops
- Mode shape computation for SSR/Stability evaluation
