Power Quality Fundamentals

Power quality problems are easier to solve when you have a solid grasp of the underlying phenomena. This section covers the foundational concepts — definitions, disturbance categories, grounding principles, and electromagnetic compatibility basics — that apply across all industrial and utility environments.

Whether you are new to the field or need a structured reference, this is the right starting point before moving into more specialized topics such as harmonics, 電圧サグ, or flicker.