報告書番号

U94015

タイトル（和文）

地震時における電力基幹系統の信頼性評価法

タイトル（英文）

SEISMIC RELIABILITY ANALYSIS OF ELECTRIC POWER PRIMARY SYSTEM

概要 （図表や脚注は「報告書全文」に掲載しております）

基幹系統を対象とした電力流通システムの地震時における供給信頼度を現実の復旧作業の過程に則して定量評価するための手法を開発し，その有効性を検証した。まず，地震時に行われる電力潮流の調整を模擬したアルゴリズムを提案した。つぎに，米国電気電子学会の２２ノードモデルを用い，本手法が既存の手法に比べ，より現実的に供給信頼度を評価できることを明らかにした。最後に，米国メンフィス市の実システムに適用し，リスクカーブ（供給支障電力に対する超過確率のカーブ）を用いて，実務における設備計画等に本手法が有効であることを示した。

概要 （英文）

TO EVALUATE THE FUNCTIONAL LOSS OF ELECTRIC POWER SYSTEMS IN EARTHQUAKES,EXISTING METHODS FOCUS MAINLY PHYSICAL CONNECTIVITY CALLED CONNECTIVITY ANALYSIS. HOWEVER,IT IS NECESSARY TO CONSIDER THE PROPERTY OF ELECTRICITY AND EFFECTS OF FLOW CONTROL TO EVALUATE THE FUNCTIONAL LOSS CORRECTLY. THESE CONDITIONS ARE SCARCELY CONSIDERED IN EXISTING METHODS FOR ESTIMATING FUNCTIONAL LOSS. THE OBJECTIVE OFTHIS STUDY IS TO PROPOSE A METHOD FOR ESTIMATING FUNCTIONAL LOSS OF ELECTRIC POWER SYSTEMS CONSISTING MAINLY OF PRIMARY SYSTEMS TAKING THE ABOVE THREE CONDITIONS INTO ACCOUNT. THE PROPOSED ANALYSIS HAS TWO STEPS.1.TO EVALUATE FUNCTIONAL LOSS OF POWER FACILITIES AND RECONSTRUCT THE POWER SYSTEM BASED ON CONNECTIVITY ANALYSIS AND MONTE-CARLO SIMULATION.2.TO CHECK AND CONTROL POWER FLOW THROUGH THE RECONSTRUCTED POWER SYSTEM BASED ON THREE CRITERIA. (1)SYSTEM FREQUENCY (2)VOLTAGE (3)TRANSMISSION LINE CURRENT FINALLY,WE TREATED TOTAL CONTROLLED POWER AS FUNCTIONAL LOSS OF THE POWER SYSTEM AND CALCULATED THE OCCURRENCE PROBABILITIES USING MONTE-CARLO SIMULATION. WE APPLIED THE PROPOSED ANALYSIS TO A SMALL MODEL POWER SYSTEM AND A REAL POWER SYSTEM IN MEMPHIS,USA,AND GOT THE FOLLOWING RESULTS. (1)THE METHOD ESTIMATED THE RELIABILITY OF ELECTRIC POWER TRANSMISSION SYSTEMS IN EARTHQUAKES BASED ON SYSTEM FREQUENCY,VOLTAGE,AND TRANSMISSION LINE CURRENT AND FLOW CONTROL. (2)THE METHOD PROVIDED QUANTITATIVE DATA FOR PLANNING ELECTRIC POWER TRANSMISSION SYSTEMS USING RISK CURVES SHOWING THE RELATIONSHIP BETWEEN POWER SUPPLY LOSSAND OCCURRENCE PROBABILITY.

報告者

キーワード