Short-term load forecasting using AI techniques

o Implementation of Hybrid Short-term Load Forecasting System Using Artificial Neural Networks and Fuzzy Expert Systems

o Implementation of Short-term load forecasting system in a real environment

o Short-term load forecasting for special days in anomalous load conditions using neural networks and fuzzy inference method

• developed and implemented for Online Short-term Load Forecasting System for Korea Electric Power Corporation (KEPCO).

• forecast the 24-hour total electric power system load nationwide one-day ahead

• ANN method : forecasting the work days (having similar patterns each other)

• Fuzzy relation method : foresting weekend and holidays (having specific patterns)

Fault Detection in Power Systems

o An ANN based approach to Improve the Speed of a Differential Equation Based on Distance Relaying Algorithm

• ANN are trained with many shapes of impedance loci for various fault conditions (input parameters of ANN) and their fault distances (output parameters of ANN). The proposed method improves the speed of fault detection without accuracy degradation

o Islanding Detection for Distributed Generations Using Voltage Unbalance and Total Harmonic Distortion of Current

• By using the new indicators, voltage unbalance rate and harmonic distortions of current, the proposed method overcomes the limitations of previous islanding detection methods on small variation before/after the main grid interruption

o An Adaptive Relaying for the Protection of a Wind Farm Interconnected with Distribution Networks

o An Adaptive Overcurrent Relaying Algorithm for Distribution Feeder with Wind Turbine Generators

• The proposed method changes the decision criteria for overcurrent detection and enhance the performance of overcurrent relay which are usually hindered by the variation of wind turbine generation since WT supply the fault current to the faulted circuit.

Assessment for Effects on Power Systems connected with Wind turbines

o Test and Assessment for 750kW Wind Turbine Generator made in Korea

• The 1st try in Korea for developing the Korean large-scale Wind Turbines (750kW) in 2001

• Assessment of the effect on power system operation and power quality due to interconnection of the WT

o Construction of Infra Structures and Integrated Monitoring System for Wind Turbine Test and Research Site in Korea

• developed the integrated monitoring system for WT test and research

Electrical Energy Policy

o Pricing Strategy in Distribution and Marketing Department for Direct Access and Distribution Sector in KEPCO

o Pricing Strategy for Connection Charge toward the Competitive Power Market in Korea

• The projects design the pricing and tariff structure for distribution network (under 22.9kV)

o A Study of the Decision Criteria for Suggested Load Capacity of Distribution Network

• The interconnection capacity of DG was limited with 10MW in Korea Distribution network(22.9kV), and the projects proposed increasing to 10 ~ 30MW depending on the network condition