Power Solutions
Electric Power System Analysis
“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.
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ETAP software solution for-
electric power systemETAP 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.
- It is the most recognized program with around 75% market share in the power industry
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Reference
projectConducted over 50 projects including major projects as follows- TEEKAY FPSO
- EGINA FPSO
- BGT LNG CARRIER
- SEAJACK WTIV
- STATOIL FSU
- GASLOG LNG CARRIER
- SK-TOTAL LNG CARRIER
- KOGAS LNG CARRIER
- CMA CGM CONTAINER
- SCORPIO 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
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* Overall Single Line Diagram – Short Circuit Result
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* 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
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* Overall Single Line Diagram - Load Flow Result
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* 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
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* Motor Starting Analysis - Bus Voltage Plot
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* Motor Starting Analysis - Motor CKT Model
Harmonic Analysis
- 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
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* Harmonic Analysis - Line to Neutral Voltage Waveform
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* 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
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* Transient Stability - Bus Voltage Plot
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* 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.
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* Relay Coordination - Time Current Curves
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* Relay Coordination - Parameter Setting List