周波数偏差

ドイツの送電システムの電力品質 — 大規模モニタリング, 相関分析, と長期予測

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85 IEC 61000-4-30 Class A monitoring sites across 50 substations in the German transmission system — 38 に 110 kVの, 21 に 220 kVの, 26 に 380 kVの. Hierarchical clustering reveals which sites are redundant and which are uniquely informative. Ensemble forecasting of weekly 95th-percentile PQ parameters outperforms any individual model. The first dataset to demonstrate systematic, recurring PQ correlation structures at transmission level driven by inverter-based generation.

AI データセンターと電力品質 — 系統障害の新しいカテゴリー

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AI training clusters create a load type that did not exist when power quality standards were written: synchronised GPU operation producing oscillatory load signatures with 10+ MW/second ramps, harmonic THD exceeding 5%, and simultaneous UPS disconnection risk of 2+ GW in dense data centre corridors. A real Dominion Energy grid event was triggered by a data centre producing a voltage sag at precisely once per second. Three open-access papers from 2025–2026 document the scale of the problem and the mitigation approaches now being required by grid operators.

アメージングインターナショナル – 発電機から供給されるモーター制御センターの高調波緩和: 天然ガス甘味プラント

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Natural gas sweetening plant with a generator-fed motor control centre: the generator’s high source impedance amplified harmonic voltage distortion from VFD loads to levels that caused control system malfunctions. Mirus filter selection had to account for the generator impedance characteristics rather than infinite bus assumptions — a common oversight in generator-fed harmonic filter design.

風力発電 (日置)

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Wind power generation creates unique PQ challenges: output voltage fluctuates with wind speed, frequency deviates from nominal, transient overvoltages occur from lightning and grid switching, and inrush current and harmonics accompany inverter operation. Simultaneous measurement of all parameters is essential for grid interconnection compliance assessment.

風力発電の電力品質 & 相互接続の問題 (Dranetz)

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Wind generation plant interconnection requires assessment of harmonics, ちらつき, voltage fluctuation, frequency deviation, and fault ride-through capability. Dranetz monitoring solutions cover both temporary commissioning assessment and permanent 24/7 monitoring for continuous interconnection compliance verification on wind farms of any size.

電子のガラス工場の失敗は、ケーススタディを制御します (Dranetz)

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A glass factory imported from a 60 Hz country to a 50 Hz country suffered repeated electronic control failures, reducing production capacity by 50%. Voltmeters and simple monitors failed to capture the cause. Full PQ monitoring eventually revealed voltage transients and harmonic distortion incompatible with the 60 Hz-designed electronics — a frequency migration problem compounded by poor power quality.

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