報告書番号

180008

タイトル（和文）

発電機特性と負荷特性を考慮した汐流計算法

タイトル（英文）

LOAD FLOW CALCULATION WITH GENERATOR & LOAD CHARACTERISTICS

概要 （図表や脚注は「報告書全文」に掲載しております）

発電所のガバナ，ＡＶＲ，負荷の電圧周波数特性を考慮した新しい汐流計算法を開発した。（１）発電機特性，負荷特性との不整合がない。（２）周波数を可変としてスイングブスを不要としている。（３）ＬＦＣ，ＶＱＣ出力が直接指定できる。（４）ミスマッチ修正の同時性を高め，収斂性を著しく改善している。（５）発電機，負荷のみでなく，送電網の周波数特性も考慮している。擾乱発生前後の汐流変化，ＬＦＣ，ＶＱＣの動的シミュレーションへの適用などを通じて，本手法の効率性，適応性の高さが検証されている。

概要 （英文）

A NEWLY DEVELOPED LOAD FLOW CALCULATION METHOD PRESENTED IN THIS PAPER HAS REMARKABLE FEATURES AS FOLLOWS. (1)THE STATIC CHARACTERISTICS OF GENERATORS,SPEED GOVERNORS,VOLTAGE REGULATORS AND SYSTEM LOADS ARE INCLUDED IN THE FUNDAMENTAL EQUATIONS AND THE CORRECTION JACOBIAN MATRIX OF THE LOAD FLOW CALCULATION. (2)THE SYSTEM FREQUENCY IS TREATED AS AN ADDITIONAL VARIABLE TO MAKE NO USE OF THE SWING BUS WHICH HAS BEEN UNWILLINGLY INTRODUCED IN THE TRADITIONAL LOAD FLOW CALCULATION TO ABSORB THE ACTIVE- AND REACTIVE-POWER MISMATCH OF THE WHOLE SYSTEM. (3)THE OUTPUTS OF THE LOAD FREQUENCY CONTROL(LFC)AND THE VOLTEGE REACTIVE-POWER CONTROL(VQC)ARE DESIGNATED DIRECTLY AS THE BOUNDARY CONDITION INSTEAD OF P-Q OR P-V DESIGNATION,SO THAT THE LOAD FLOW SOLUTION VERY CLOSE TO THE ACTUAL OPERATION CONDITION IS OBTAINED EASILY. (4)THE LINEARITY OF THE CORRECTION JACOBIAN MATRIX IS PRESERVED AS HIGHAS POSSIBLE TO GET THE QUICK CONVERGENCE OF THE SOLUTION. (5)THE FREQUENCY DEPENDENCES NOT ONLY OF THE GENERATORS AND THE LOADS BUT ALSO OF THE TRANSMISSION LINES ARE CONSIDERED AND THEREFORE THE P-Q TRANSMISSIONLOSS IS EVALUATED WITH VERY HIGH ACCURACY. APPLICATION EXAMPLES USING THE MODEL SYSTEM SHOW THE VERY GOOD TENDENCY OF CONVERGENCE,THE SUFFICIENT ACCURACY AND THE HIGH COMPUTATIONAL EFFICIENCY OF THIS NEW LOAD FLOW CALCULATION METHOD. THE WIDE VARIETY OF THE APPLICATION OF THIS METHOD IS ALSO DISCUSSED CONCERNING WITH THE FINAL STEADY STATE STABILITY AFTER DISTURBANCE,THE VOLTAGE STABILITY AFTER DISTURBANCE,THE LONG TERM SYSTEM DYNAMICS,LFC & VQC DYNAMIC OPTIMIZATION,AND SO ON.

報告者

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