AVC演示文件.ppt

Power Quality （PQ电能质量） 1. The power supply has become reliable! 电力供应已经变得可靠！ 2. Long interruptions and blackouts are rare 长期的中断和停电少见 3. Hence increased focus on other problems因而更加关注其他问题 4. Equipment has become less tolerant设备已经变得容忍度更小 EPRI Has Identified Sags As The Most Important Power Quality Issue From A Financial Point Of View美国电力研究院EPRI认为从财务损失的角度来讲，短暂电压跌落是最重要的电能质量问题。 Voltage sags have been identified in many international studies as being the single most expensive power quality event costing industry and commerce many billions of dollars a year. 许多国际化研究都表明，电压跌落是造成损失最大的一种电能质量问题，其在工业和商业领域每年造成的损失高达数十亿美元。 Number Of Sags Per Year每年暂态电压跌落次数 Distribution Connected Plants Sag Warnings电压暂降警告 The most common PQ pr oblem facing industry is Sag events工业 界面临的最大电能质量问题是电压暂降事件 According to EPRI, sags account for 92% of PQ events据美国电科院，电压暂降占据了超过92%的电能质量事件 Facilities do not get advance warnings of impending sags工厂 无法事先得到即将到来的电压暂降 的警告 There is a solution解决办法在这 Types of Faults故障类型 Single phase faults 单相故障= 68% Two phase (Type not specified) 两相故障= 19% Three phase fault 三相故障= 13% Three phase faults are the most severe三相故障最严重 Transmission Faults传输线故障 Single Phase – Ground 68% of Faults 单相地故障68% 1995 - 2005 FAB Plant Actual PQ Results1995 – 2005年半导体制造工厂实际电能质量结果 Semi F47 Standard标准 Voltage Sag Data Semiconductor FAB 1995-20051995 – 2005年半导体制造工厂电压暂降数据 Scatter Plot Of Voltage Sag Event Data For MajorSemiconductor Sites主要半导体现场电压暂降事件数据分布图 AVC2 Specifications规格 ? Full correction, three-phase sags down to 70%retained voltage三相电压暂降至70%完全校正 ? Full correction, single-phase sags down to 55% retained voltage单相电压暂降至55%完全校正 ? Partial correction, three-phase sags down to 30% retained voltage三相电压暂降至30%部分校正 ? Partial correction single-phase sags down to 0% retained voltage单相电压暂降至0%部分校正 ? Continuous “ONLINE” regulation持续“在线”调节 ? Over and under voltage regulation过电压和欠电压调节 ? Correction for voltage vector phase angle error