報告書番号

T93080

タイトル（和文）

太陽電池接続に対応できるロードコンディショナーの性能実証（その２）

タイトル（英文）

FIELD OPERATION TEST OF UTILITY-INTERACTIVE LOAD CONDITIONER WITH PHOTOVOLTAIC CELLS AT DEMONSTRATION HOUS: PART 2

概要 （図表や脚注は「報告書全文」に掲載しております）

「省エネ型電力有効利用住宅システム」実証棟に設置した家庭用ロードコンディショナーの動作実証試験を実施した。約２年間の連続運転の結果，さらなる高性能化のためには，低負荷時の電力変換器の効率向上，太陽電池余剰電力出力時の電圧制御の改良，蓄電池の残存容量判定機能の精度向上などの改善課題が明らかとなった。また，組電池内の各蓄電池電圧挙動に蓄電池の温度分布が大きく影響し，組電池全体の性能低下要因となっている可能性を示唆した結果となった。

概要 （英文）

A LOAD CONDITIONER IS A STORAGE SYSTEM WITH BATTERIES ON THE DEMAND SIDE. IT HAS SOME MERITS FOR BOTH UTILITIES ANDCUSTOMERS. IN APRIL 1992,WE INSTALLED A LOAD CONDITIONER IN A HOUSE WITH SOME NEW TECHNOLOGIES,SUCH AS A PHOTOVOLTAIC POWER GENERATION SYSTEM. WE HAVE BEEN RUNNING THE LOAD CONDITIONER WITH OTHER EQUIPMENT IN THIS HOUSE FOR ABOUT 2 YEARS. WE HAVE OBTAINED A GOOD RESULTS WITH EVIDENCE OF SOME LOAD-CONDITIONER PROBLEMS AS FOLLOWS: (1)THE LOAD CONDITIONERCOULD SHIFT POWER SUPPLY FROM THE COMMERCIAL LINE FROM DAY TO NIGHT. ALOAD CONDITIONER WITH A 4.6 KWP PV ARRAY WORKS VERY WELL WHEN THE DAY TIME LOAD CAPACITY IS LESS THAN ABOUT 12 KWH/DAY. (2)THE POWER CONDITIONER IN THE LOAD CONDITIONER MAINTAINED GOOD OPERATION. THE AVERAGE EFFICIENCY FOR BOTH AC/DC AND DC/AC POWER CONVERSION WAS MORE THAN 85%. BUT,THE TOTAL EFFICIENCY,DEFINED AS THE PRODUCT OF THE CHARGE/DISCHARGE EFFICIENCY OF THE BATTERY AND THESE TWO EFFICIENCIES,WAS NOT ALWAYS MORE THAN 70%. (3)THE CHARGE PATTERN DURING THE NIGHT (23:00 TO 7:00) WAS NOT CONSTANT BECAUSE OF THE RESIDUAL BATTERY CAPACITY OF THE LOAD CONDITIONER,BECAUSE THE DISCHARGE CAPACITY DECREASED 6 MONTHS AFTER STARTING THE TEST. THE VOLTAGE PROFILE OF EACH BATTERY IN A MULTICELL CONNECTION SHOWED DETERIORATION IN SOME BATTERIES.

報告者

キーワード