POWER SYSTEM AND INVERTER DEVICE

• Main Authors: OHORI AKIHIRO, KITAMURA TAKATSUGU
• Format: Patent
• Language: English; Japanese
• Published: 03.03.2023
• 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 system that excellently performs control of an autonomous operation, when parallelly operating a plurality of distributed power supplies.SOLUTION: A power system S1 comprises a plurality of inverter devices A each for supplying power to a load. The inverter devices A each comprise a measurement part 1, a first calculation part 31, a second calculation part 32, a first setting part 41, a second setting part 42, a control part 5, and a communication part 2. The first calculation part 31 produces an active power internal value and calculates an average value of an active power output measured by each of the inverter devices A. The second calculation part 32 produces a reactive power internal value and calculates an average value of a reactive power output measured by each of the inverter devices A. The first calculation part 31 produces a new active power internal value, using a calculation result based on a produced active power internal value and a received active power internal value. The second calculation part 32 produces a new reactive power internal value, using a calculation result based on a produced reactive power internal value and a received reactive power internal value.SELECTED DRAWING: Figure 3 【課題】複数の分散電源を並列運転させる場合において、自立運転の制御を良好に行う電力システムを提供する。【解決手段】電力システムＳ１は、負荷に電力を供給する複数のインバータ装置Ａを備える。各インバータ装置Ａは、計測部１、第１演算部３１、第２演算部３２、第１設定部４１、第２設定部４２、制御部５および通信部２を備える。第１演算部３１は、有効電力内部値を生成し、各インバータ装置Ａで計測された有効電力出力の平均値を演算する。第２演算部３２は、無効電力内部値を生成し、各インバータ装置Ａで計測された無効電力出力の平均値を演算する。第１演算部３１は、生成した有効電力内部値と受信した有効電力内部値とに基づく演算結果を用いて、新たな有効電力内部値を生成する。第２演算部３２は、生成した無効電力内部値と受信した無効電力内部値とに基づく演算結果を用いて、新たな無効電力内部値を生成する。【選択図】図３