DISTRIBUTED POWER GENERATION SYSTEM

• Main Authors: MASUMOTO YUKITSUGU, TANAKA MASASHI, WATANABE SHINGO, KOYAMA YOSHIHIKO, HAMASO MASAMI, SASHIHARA KAZUHIDE
• Format: Patent
• Language: English; Japanese
• Published: 19.03.2020
• 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; BASIC ELECTRIC ELEMENTS; 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; PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSIONOF CHEMICAL INTO ELECTRICAL ENERGY; SYSTEMS FOR STORING ELECTRIC ENERGY

To provide a distributed power generation system capable of handling surplus power, even without a large capacity electric heater.SOLUTION: A power conversion unit 11 includes a switching circuit part having switching elements constituted of semiconductor elements, and a smoothing circuit part having a coil. When a determination is made that excess power conditions are not satisfied, i.e., the power generated from a power generation part 12 is not excessive, a control arrangement C controls the power conversion unit 11 to perform normal loss operation by switching multiple switching elements at a prescribed timing, and when a determination is made that excess power conditions are satisfied, decreasing the number of ON/OFF times of the switching elements compared with that when normal loss operation is performed, thereby switching the multiple switching elements at such a timing the loss increases in the smoothing circuit part of the power conversion unit 11, thus performing large loss operation where the power conversion unit 11 performs power conversion.SELECTED DRAWING: Figure 1 【課題】大容量の電気ヒーターを備えなくても、余剰電力の処理を行うことができる分散型発電システムを提供する。【解決手段】電力変換部１１は半導体素子で構成されるスイッチング素子を有するスイッチング回路部とコイルを有する平滑化回路部とを備え、制御装置Ｃは、発電部１２の発電電力が過剰になる電力過剰条件が満たされないと判定したとき、所定のタイミングで複数のスイッチング素子のスイッチングを行うことで、電力変換部１１による電力変換を行わせる通常損失運転を行わせ、電力過剰条件が満たされると判定したとき、スイッチング素子のオンオフ回数が通常損失運転が行われるときよりも少なくなることで電力変換部１１の平滑化回路部での損失が大きくなるタイミングで複数のスイッチング素子のスイッチングを行うことで、電力変換部１１による電力変換を行わせる大損失運転を行わせる。【選択図】図１