DISTRIBUTED POWER SUPPLY SYSTEM

To provide a technique that can more reliably control an output power in a distributed power supply system to a higher output power within a range where a reverse flow toward a system does not occur.SOLUTION: A distributed power supply system (1) comprises: a power generator (20); a power conditioner (10); and output terminals (17, 18, 19) that are connected with loads (2, 3) being power supply targets and a commercial power system (1a), and outputs a predetermined output power to supply the power to the loads (2, 3). The distributed power supply system comprises: detection means (6a, 6b) that detect the output power in a past predetermined period; output changing means (13) that changes the output power; and a control unit (12) that detects the maximum value of a system power in the past predetermined period detected by the detection means (6a, 6b), and when the maximum value of the system power is smaller than a threshold at which a reverse flow to the commercial power system (1a) can occur, causes the output changing means (13) to increase the output power by a predetermined amount.SELECTED DRAWING: Figure 2 【課題】散型電源システムにおける出力電力を、系統側への逆潮流が発生しない範囲でより高い出力電力に、より確実に制御できる技術を提供する。【解決手段】発電装置（２０）と、パワーコンディショナ（１０）と、電力供給対象である負荷（２、３）と商用電力系統（１ａ）とに接続された出力端（１７、１８、１９）とを備え、所定の出力電力を出力することで前記負荷（２、３）に電力を供給する分散型電源システム（１）であって、過去の所定期間における前記出力電力を検知する検知手段（６ａ、６ｂ）と、出力電力を変更する出力変更手段（１３）と、検知手段（６ａ、６ｂ）が検知した過去の所定期間における系統電力の最大値を検出し、系統電力の最大値が、商用電力系統（１ａ）への逆潮流が生じ得る閾値より小さい場合には、出力変更手段（１３）に出力電力を所定量だけ増加させる制御部（１２）と、を備える。【選択図】図２