Abstract: A pixel includes an organic light emitting diode (OLED), a pixel circuit, and first and second transistors. The OLD includes a cathode electrode connected to a second power source. The pixel circuit includes a driving transistor having a gate electrode initialized by a third power source. The driving transistor controls the amount of current flowing from a first power source to the second power source via the OLED. The first transistor is connected between a fourth power source and the second power source and an anode electrode of the OLED. The first transistor is turned on based on a scan signal is supplied to a scan line. The second transistor is connected between a data line and the pixel circuit. The second transistor is turned on when the scan signal is supplied to the ith scan line.

Abstract: Provided is an optimized system voltage control method through coordinated control of reactive power source, which analyzes the location for reactive power compensation and the effect of applying compensation equipment by calculating the reactive power and voltage sensitivity of a power system, thus improving the voltage quality of the power system.

Abstract: A monitoring system using a real-time simulator, providing a simulation environment of a real electric power system that enables testing of a new electric power system control facility. The operation of the new electric power system control facility and effects thereof on a real electric power system can be evaluated before actual installation. The monitoring system includes a test piece installed in an electric power system; a simulator connected to the test piece, and deriving electric power system simulation data by simulating the electric power system with respect to the test piece; a multimedia interface (MMI) platform interworking with the simulator, providing the simulator with electric power system status data for simulating the electric power system, and receiving the electric power system simulation data from the simulator; and an MMI client interworking with the MMI platform to display the electric power system simulation data from the MMI platform.

Abstract: A monitoring system using a real-time simulator, providing a simulation environment of a real electric power system that enables testing of a new electric power system control facility. The operation of the new electric power system control facility and effects thereof on a real electric power system can be evaluated before actual installation. The monitoring system includes a test piece installed in an electric power system; a simulator connected to the test piece, and deriving electric power system simulation data by simulating the electric power system with respect to the test piece; a multimedia interface (MMI) platform interworking with the simulator, providing the simulator with electric power system status data for simulating the electric power system, and receiving the electric power system simulation data from the simulator; and an MMI client interworking with the MMI platform to display the electric power system simulation data from the MMI platform.

Abstract: Provided is an optimized system voltage control method through coordinated control of reactive power source, which analyzes the location for reactive power compensation and the effect of applying compensation equipment by calculating the reactive power and voltage sensitivity of a power system, thus improving the voltage quality of the power system.