电车自燃是因为“劣质电”？我被这个说法给逗乐了

Core Viewpoint - The article discusses the misconceptions surrounding the quality of electricity, particularly in relation to electric vehicle (EV) fires, and clarifies that the term "poor quality electricity" is not accurately defined in the way it is commonly understood [5][15]. Group 1: Electricity Quality - Electricity quality is evaluated based on three main indicators: voltage, frequency, and waveform, with the ideal standard being 220V/50Hz in China [16][19]. - National standards allow for certain deviations in electricity quality, such as a frequency deviation limit of ±0.2Hz under normal conditions [19][20]. - If electricity exceeds these deviation limits, it can be classified as "poor quality electricity" [20]. Group 2: Harmonics and Their Effects - Non-linear devices, such as diodes, can create harmonics that disrupt the stable waveform of electricity, leading to issues like flickering lights or overheating circuits [21][27]. - Harmonics are considered a byproduct of the electrical grid, and while they can be problematic, modern electrical systems are equipped with devices to mitigate these issues [30][31]. Group 3: Electric Vehicle Charging - Electric vehicles are designed to diagnose and suppress harmonics, making it nearly impossible for them to be charged with "poor quality electricity" [33]. - The notion of using "high-quality" electricity at a premium price is challenged, as the article suggests that the cheapest electricity can be just as effective for charging [37].