“Power system analysis accurately predicts accidents and risks.
And it applies prevention and protection systems”
A power system delivers electricity generated from a generator to each load by transporting and distributing.
Such power system has risk of unexpected accidents due to short circuit and breakdown of equipment and instability due to harmonic wave and transients. Therefore, it is especially important to establish a system for minimizing damage in any situation by accurately predicting accidents and risk factors expected from power system analysis and applying preparatory and protective systems from the design.
ETAP software solution for-
electric power system
ETAP supports designing a stable power system through diverse analysis using the representative power system analysis program that is being used all over the world.
It is the most recognized program with around 75% market share in the power industry in Korea.
As of May 2018, ETAP version 16.2 is being used, which is continuously managed and upgraded via domestic agents.
Conducted over 50 projects including major projects as follows
BGT LNG CARRIER
GASLOG LNG CARRIER
SK-TOTAL LNG CARRIER
KOGAS LNG CARRIER
CMA CGM CONTAINER
Major Analysis Applied to Power System
Short Circuit Analysis
Simulates accidents in various forms at each point in the system to analyze short circuit
Based on the analysis result, the capacity of distribution board and protective equipment is determined and grounding method and protective relay are set
* Overall Single Line Diagram – Short Circuit Result
* Short Circuit Summary Report
Load Flow Analysis
Checks electricity flow in each operation mode and reviews voltage of bus bar
Based on analysis result, capacity and tab of transformer are set and generation capacity is confirmed
* Overall Single Line Diagram - Load Flow Result
* Load Flow Report
Motor Starting Analysis
Evaluates the influence on entire system of voltage drop due to startup current from starting up the motor
Analysis results are used to set startup method of a motor and transformer tab
* Motor Starting Analysis - Bus Voltage Plot
* Motor Starting Analysis - Motor CKT Model
Evaluate the influence of voltage and current wave from harmonic load such as VFD and UPS
Based on the analysis result, international standards are confirmed and filter for reducing harmonic wave is designed
* Harmonic Analysis - Line to Neutral Voltage Waveform
* Harmonic Analysis - Voltage Spectrum
Transient Stability Analysis
Evaluate system stability to electric disturbance such as failure, breaker opening and closing, and disconnection of load and generator
Based on the analysis result, protective relays are set, generator operation plans are set and load breaking method is determined
* Transient Stability - Bus Voltage Plot
* Transient Stability - Bus Frequency Plot
Transient Stability Analysis
Protective sections of relays and breakers are reviewed to review protective cooperation and design so that only the failing section can be promptly separated
Characteristic curves of equipment such as generators, transformers and motors are analyzed to adjust breaker and relay setting.