INDIVIDUAL OPERATION DETECTION CIRCUIT, INDIVIDUAL OPERATION DETECTION METHOD, AND SYSTEM INTERCONNECTION INVERTER DEVICE INCLUDING INDIVIDUAL OPERATION DETECTION CIRCUIT

• Main Authors: TAMURA TORU, OHORI AKIHIRO
• Format: Patent
• Language: English
• Published: 05.12.2013
• Subjects: APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC,OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWERSUPPLY SYSTEMS; CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTINGELECTRIC POWER; CONTROL OR REGULATION THEREOF; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUTPOWER; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER; ELECTRICITY; GENERATION; SYSTEMS FOR STORING ELECTRIC ENERGY

PROBLEM TO BE SOLVED: To provide an individual operation detection circuit capable of detecting individual operation in an easy way.SOLUTION: The individual operation detection circuit includes a target value change instruction unit 61 which instructs to vary the reactive power at an interconnection point of a system interconnection inverter system A, and an individual operation determination unit 62 for determining whether or not the system interconnection inverter system A is in the individual operation state, on the basis of a reactive power value Q detected at the interconnection point. For example, the individual operation determination unit 62 determines that the reactive power value Q has not changed if the variation Q of reactive power value Q is smaller than a predetermined value, and determines that the system interconnection inverter system A is in the individual operation state when determination is made that the reactive power value Q has not changed repeatedly a predetermined number of times.