Abstract: Provided is an apparatus and method for measuring a concentration level of particulates in water, by measuring a sound generated upon decomposition of particulates in a water sample which is irradiated by a laser beam.

Abstract: Disclosed herein is a dry regenerable sorbent for carbon dioxide capture from flue gas produced by fossil fuel-fired power plants including industrial boilers before being released to atmosphere or from fuel gas stream such as syngas produced by conversion of fossil fuel (e.g. gasification), by dry regenerable sorbent technology. The dry regenerable sorbent comprises: 70 wt % or less of an active component selected from solid compounds capable of being converted to metal carbonates; 70 wt % or less of a support selected from solid porous non-metallic materials capable of imparting a required specific surface area to the sorbent; and 70 wt % or less of an inorganic binder selected from cement-like, clay-like, and ceramic-like binders capable of imparting mechanical strength to the sorbent, the total weight of the solid raw materials being 100 wt %.

Abstract: A robot mechanism adopts a dry cleaning method to clean the surface of live-line insulators without using water and can perform cleaning and inspection of the surface of the live-line insulators while automatically moving along an insulator string. The robot mechanism includes a main unit having upper and lower wing frames connected with each other by a connecting bracket to surround the insulator string, a cleaning unit disposed between the upper and lower wing frames and including a base frame to perform dry cleaning with a rotational brush and a CM guide, a lift unit including a clamp and a ball-bearing screw to move the main unit up or down, and an inspection unit to electrically inspect the insulators; and a coupling unit to couple a pair of the main units to allow the pair of main units to move along a tension insulator string or a suspension insulator string.

Abstract: A creep tester for a precise and accurate creep test includes a movable actuator capable of loading corresponding to change in length of a specimen, a cam actuator operated in association with the movable actuator, and a self weight actuator. The movable actuator includes upper and lower spherical adjusting seats to hold upper and lower portions of the specimen, a spring disposed on the upper spherical adjusting seat to correspond to a minute deformation of the specimen, upper and lower movable tables respectively contacting the spring and the lower spherical adjusting seat, a load cell and a stationary table disposed on the upper movable table, and a movable loading table disposed below the lower movable table to apply a predetermined load to the specimen. The creep tester can perform a precise creep test by continuously applying a constant load without supplementation of hydraulic pressure.

Abstract: Provided is a submerged-type, electrosorption-based desalination apparatus for water purification and method, comprising applying a DC voltage of 0.1 to 2.0 volts to a carbon electrode of the reactor to thereby adsorb inorganic ions on the carbon electrode, and reversely applying the same DC voltage having opposite polarity to recycle regeneration solution to the outside of the apparatus or into the treatment tank, thereby enhancing a recovery rate. In addition, in order to improve desalination efficiency, the reactor used in the desalination apparatus may be embodied in various forms of T-shaped, linear type, single, composite, and ion exchange membrane electrodes. Therefore, the present invention may be applied to remove inorganic ions from industrial wastewater, sea water, and brackish water, which contain large amounts of inorganic ions.

Abstract: Disclosed is an absorbent for separation of carbon dioxide from mixed gases, comprising a mixture of i) a compound of the chemical formula 1 having one or more groups of three functional groups consisting of amino group attached to a tertiary carbon atom; carboxylate group; and hydroxyl group respectively, in a molecule, or a compound of the chemical formula 2 having one or more groups of two functional groups consisting of amino group attached to a quarternary carbon atom; and carboxylate group respectively in a molecule, and ii) an amine compound which promotes the reaction. The absorbent for separation of carbon dioxide of the present invention is advantageous economically, since its efficiency is excellent due to larger unit absorption amount of carbon dioxide, and the energy required for regeneration can be reduced due to the relatively wider difference of absorption amounts with temperature.

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 voltage-sourced High-Voltage Direct Current (HVDC) apparatus, which converts 3-phase AC voltage from a 3-phase AC power source into high voltage DC through a rectifier including switching elements, is provided. In the apparatus, a rectifier controller receives detected 3-phase currents, apparent power, and active power and generates D and Q-axis signals. A D/Q controller receives the signals and generates active power D-axis signal and apparent power Q-axis signal. A PWM unit generates PWM on/off signals for turning on/off the switching elements based on output signals from the D/Q controller. The D/Q controller includes a rotary converter to convert the D and Q-axis signals into AC signals and D and Q-axis order units coupled thereto, and generates the D and Q-axis signals through the order units. The PWM unit converts the D and Q-axis signals into 3-phase AC signals and compares them with 3-phase triangular waves to generate on/off signals for turning on/off the switching elements.

Abstract: Disclosed is provided a hybrid-type superconducting fault current limiter for rapidly limiting a fault current, the fault current limiter having a first circuit and a second circuit which are connected in parallel with each other, wherein the first circuit includes a superconductor and a circuit breaker which are connected in series with each other, and wherein the second circuit includes a driver having a driving coil and an electromagnetic repeller, a short contact connected in parallel with the driver, and a current limiting unit connected in series with a third circuit including the driver and the short contact. The hybrid-type superconducting fault current limiter comprises a power semiconductor element switch connected in series with the first circuit, the power semiconductor element switch normally maintaining an ON state and being activated and changed into an OFF state by a fault sensing signal generated according to an inflow of the fault current.

Abstract: An installation structure of a ground rod for driving the rod deep into the ground comprising an overhead earth wire installed to protect transformers, power-transmission lines, etc. from lightning; a ground wire that is extended from a lightning arrester to a ground; a multi-stage ground rod elongated by a thread type connection and connected with the end of the ground wire that it is buried into the ground; and a connecting sleeve for connecting the ground rod to the ground wire, the electric conductive compound preventing corrosion in the thread connection including a lead terminal side junction of the and a ground wire side junction of the connecting sleeve. Corrosion of the gap between junctions is inhibited by inserting electric conductive compound into the junctions of the lead terminal side and of the ground wire side of the ground wire connecting sleeve, increasing ground rod lifetimes and decreasing maintenance costs.

Abstract: Disclosed herein is an apparatus and method for measuring a specific soil resistance for distribution grounding by a three-electrode method. The apparatus uses three electrodes to measure a specific soil resistance as well as an earth resistance based on a three-electrode method in specific soil resistance measurement that is the most basic but likely to be overlooked in a practical distribution work.

Abstract: The ultra-high frequency partial discharge array sensor apparatus for a high-voltage power apparatus includes: a sensing unit which detects an electromagnetic wave partial discharge signal generated due to an internal defect of a high-voltage power apparatus and includes a plurality of sensors installed to detect information related to the position where the defect occurs; an anti-surge filter unit which prevents a surge input from the sensing unit; a signal delay time adjusting unit which equally adjusts delay times of signals input from the anti-surge filter unit; a signal switching unit which selectively transmits or blocks signals input from the signal delay time adjusting unit; a connector unit which connects a signal transmitted from the signal switching unit to the outside; and a sensor body which has a receiving space.

Abstract: A line commutation type fault current limiter which can reduce manufacturing and maintenance costs, carry out line commutation by operating a cutoff switch by fault current energy, respond rapidly to a fault, be immediately restored to an original state, and perform either an active or a passive operation. The line commutation type fault current limiter includes a coupled inductor having a primary side connected to a main circuit and a secondary side matched with the primary side, a Zener diode switch electrically connected to the secondary side of the coupled inductor, a line commutation switch connected to the Zener diode switch as well as the primary side of the coupled inductor to form a bypass path in parallel with the primary side of the coupled inductor and to cut off the main circuit, when the Zener diode switch is turned on, and a current limiting unit electrically connected in parallel with the line commutation switch to limit a current flowing into the main circuit.

Abstract: A system for power facility navigation is disclosed. For rapid dispatch in the field service including power failure recovery and maintenance, the destination location can be set using various items such as pole numbers, computerization codes, customer names, trade names, equipment numbers and GIS coordinates. Destination location setting and path finding can be performed in order of priorities assigned to these items and in consideration of characteristics of field service activities. Location coordinates are received through a GPS receiver, coordinate conversion is performed according to a facility GIS coordinate system, and map matching is processed when GPS coordinates do not match facility GIS coordinates. The road network database is composed of linear array structures and the structure of a link is configured to include information regarding all other links connected to the start node and end node in a manner that link information and node attributes are integrated together.

Abstract: Disclosed is a triple swirl gas turbine combustor using various fuels such as coal gas, DiMethyl Ether, and waste gas generated in an ironworks in a gas turbine. The triple swirl gas turbine combustor combusts three different fuels simultaneously or individually and various fuels such as LCV gas and HCV gas so that fuel flexibility can be improved. Swirl generated in a second swirler of the triple swirler is reversely jetted to increase a mixing degree of a fuel-air mixture and an intensity of a turbulent flow so that combustion efficiency can be increased, harmful exhaust gas can be reduced and vibration can be reduced.

Abstract: Provided is a high-temperature fuel cell separator. The fuel cell separator includes a fuel gas flow path containing hydrogen, an oxidant gas flow path containing mainly an oxygen component being supplied from an oxygen/nitrogen separator of a system and participating in electrochemical reactions, and a cooling gas flow path containing a nitrogen component to remove heat produced upon power generation of a fuel cell. Such a configuration provides a high-temperature fuel cell separator which is capable of improving efficiency of an overall fuel cell system through improved performance of a fuel cell stack due to increased oxygen partial pressure and which is also capable of improving reliability of the fuel cell stack through inhibition of the occurrence of a high-temperature region resulting from heat produced upon power generation of a fuel cell, by means of a flow of cooling gas containing a nitrogen component.

Abstract: Disclosed is a calibration method of an excore detector used in core power monitoring of a nuclear power plant, in which a spatial weighting function (SWF), used to theoretically predict a signal of the excore detector is multiplied by a designated calibration factor to reflect characteristics of the excore detector in a calibration process. It is assumed that the SWF is the multiplication of a one-dimensional shape annealing function (SAF) and a two-dimensional SWF, and the SAF is multiplied by the calibration factor.

Abstract: Provided is an apparatus and method for preventing reverse power flow of an over current relay. When a neutral line current is greater than a phase current, it is determined that a reverse power flow occurs, and thus a protection relay is prevented from malfunctioning. The apparatus for preventing reverse power flow of an over current relay includes: a detecting unit which detects a phase current and a neutral line current; a reverse power flow determining unit which is electrically connected to the detecting unit and compares the phase current and the neutral line current which are detected by the detecting unit to determine whether or not a reverse power flow occurs; a setting unit which is electrically connected to the reverse power flow determining unit and sets an operation time and the number of operation times of a protection relay; and an operation unit which is electrically connected to the setting unit and operates the protection relay in a manner set by the setting unit.

Abstract: Provided is a flywheel structure of an apparatus for storing energy (particularly electric power), and more particularly, to a flywheel structure of an energy storage apparatus, which allows stable operation since upper and lower thrust collars are installed on an upper and lower faces of a rotor or a hub of the flywheel, respectively and the system thus can be balanced after assembly is completed in a state that all parts including the thrust collars are assembled and which can control vibration effectively since axial displacement is controlled at upper and lower sides of the center of gravity.

Abstract: Provided is a day-ahead load reduction system based on a customer baseline load for inducing a user to efficiently manage energy consumption by applying an incentive (user compensation according to load reduction) to achieve load reduction and load decentralization.