POWER CONVERSION DEVICE

• Main Author: KOURA HIROYUKI
• Format: Patent
• Language: English; Japanese
• Published: 03.10.2022
• 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

To provide a power conversion device capable of suppressing a change in a power factor of an interconnection point better.SOLUTION: The power conversion device includes: a main circuit unit that converts power from a distributed power supply device to AC power corresponding to a power grid; and a control unit that controls the operation of the main circuit unit. The control unit includes a reference data storage unit and an output value setting unit. The reference data storage unit stores reference data representing a relation between a magnitude of active power of the main circuit unit, and a magnitude or power factor of reactive power of the main circuit unit to achieve a target power factor at a point of connection with the power grid. The output value setting unit controls the main circuit unit to obtain from the reference data the magnitude or power factor of the reactive power of the main circuit unit corresponding to the magnitude of the active power by referring to the reference data stored in the reference data storage unit on the basis of the magnitude of the active power of the main circuit unit, determine the magnitude of the reactive power of the main circuit unit on the basis of the magnitude or power factor of the reactive power obtained from the reference data, and output the reactive power of the determined magnitude.SELECTED DRAWING: Figure 2 【課題】連系点の力率の変化をより抑制することができる電力変換装置を提供する。【解決手段】分散型電源の電力を、電力系統に対応した交流電力に変換する主回路部と、主回路部の動作を制御する制御部と、を備え、制御部は、主回路部の有効電力の大きさと、電力系統との連系点で目標の力率とするための主回路部の無効電力の大きさ又は力率と、の関係を表す参照データを格納する参照データ格納部と、主回路部の有効電力の大きさを基に、参照データ格納部に格納された参照データを参照することにより、有効電力の大きさに対応する主回路部の無効電力の大きさ又は力率を参照データから求め、参照データから求めた無効電力の大きさ又は力率を基に、主回路部の無効電力の大きさを決定し、決定した大きさの無効電力を出力するように、主回路部を制御する出力値設定部と、を有する電力変換装置が提供される。【選択図】図２