Abstract: A simulation apparatus includes a database configured to a set line parameter for a system line configuring a power system; a parameter error detector configured to compare surveyed data measured in the system line and the line parameter to detect error of the line parameter; a system analysis simulator configured to perform a system analysis simulation based on the surveyed data and the line parameter; and a monitor configured to display an error detection result of the line parameter from the parameter error detector and a system analysis simulation result performed in the system analysis simulator.

Abstract: The present invention relates to a micro-grid system including a load. The load includes: a distributed power source including one or more elements which generate power; and a controller configured to derive a first load pattern by measuring load data of the load when the load is added to the micro-grid system established in advance, compare the first load pattern with a preset load pattern for each load type, and operate the distributed power source based on a result of the comparison.

Abstract: The present invention relates to a tap switch control method, which comprises the steps of: measuring data of a distribution system; calculating a second dead band and a reference voltage using the measured data; comparing the difference between the measured actual voltage and the reference voltage with a first dead band; comparing the difference between the actual voltage and the reference voltage with the second dead band, when the difference between the actual voltage and the reference voltage is outside the first dead band as a result of the comparison with the first dead band; and controlling the tap of the transformer, when the difference between the actual voltage and the reference voltage is outside the second dead band as a result of the comparison with the second dead band. Accordingly, it is possible to suppress a frequent operation of tap switching due to the fluctuations of the system and distributed power supply by applying the double dead band and to ensure the transformer's lifespan.

Abstract: A simulation apparatus includes a database configured to a set line parameter for a system line configuring a power system; a parameter error detector configured to compare surveyed data measured in the system line and the line parameter to detect error of the line parameter; a system analysis simulator configured to perform a system analysis simulation based on the surveyed data and the line parameter; and a monitor configured to display an error detection result of the line parameter from the parameter error detector and a system analysis simulation result performed in the system analysis simulator.

Abstract: The present invention relates to a micro-grid system including a load. The load includes: a distributed power source including one or more elements which generate power; and a controller configured to derive a first load pattern by measuring load data of the load when the load is added to the micro-grid system established in advance, compare the first load pattern with a preset load pattern for each load type, and operate the distributed power source based on a result of the comparison.

Abstract: The present invention relates to a tap switch control method, which comprises the steps of: measuring data of a distribution system; calculating a second dead band and a reference voltage using the measured data; comparing the difference between the measured actual voltage and the reference voltage with a first dead band; comparing the difference between the actual voltage and the reference voltage with the second dead band, when the difference between the actual voltage and the reference voltage is outside the first dead band as a result of the comparison with the first dead band; and controlling the tap of the transformer, when the difference between the actual voltage and the reference voltage is outside the second dead band as a result of the comparison with the second dead band. Accordingly, it is possible to suppress a frequent operation of tap switching due to the fluctuations of the system and distributed power supply by applying the double dead band and to ensure the transformer's lifespan.