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1. ???? ??????? 1 2 ????????? ???????????????????????????????????????,????????????,????????????,????????????????????????????????????????

2. ???? ??????? 2 2.1 ??????? ?2.1 ??????????????

3. ???? ??????? 3 IEEE-1159???????????????

4. ???? ??????? 4 IEEE-1159???????????????

5. ???? ??????? 5 2.2 ???? ???? (Voltage dips ? sags) ?????????????????????????????????????10%?90%??,???0.5??????,??????????????????????????

6. ???? ??????? 6 2.2 ????

7. ???? ??????? 7 2.3 ???? ??????? (Interruption) ????????10%??,?????????????????????????????,?????????????????????,??????????????10%?

8. ???? ??????? 8 2.3 ????

9. ???? ??????? 9 2.4 ??????? ?????????????1?????????????????(Sustained interruptions)???????1?????????????????????????,????????????????

10. ???? ??????? 10 2.5 ???? ????(Swell)??????????????,??????0.5???1??,??????1.1?1.8???????????????????????,???????,????????1????

11. ???? ??????? 11 2.5 ????

12. ???? ??????? 12 2.6 ??????? ???(Overvoltage)????(Undervoltage, ??????????????)???????????,?????????????????????1??,?????????????????????????????,?????????????????

13. ???? ??????? 13 2.6 ??????? ????????????????????????,?????????????????,????????????????????? ?????????????,???????????????????????,??????????,????????????????

14. ???? ??????? 14 2.7 ?? ????????(Transients)?????????????? ?????,???????????????????(Impulsive transient)??????(Oscillatory transient)???

15. ???? ??????? 15 2.7.1 ????? ??????????????(Spike),????????????????,???????????????????,??????????,????????????(?????)?

16. ???? ??????? 16 ?????

17. ???? ??????? 17 2.7.2 ????? ???????????(Surge),??????????????????????,??????????????(Predominant frequency)????????? ??????????????????????2.2??,??????????????????????

18. ???? ??????? 18 ?????

19. ???? ??????? 19 ????? ????500 kHz??????????(??????????)??????????????????? ????5 kHz?500 kHz???????????????,??????????????????????,??????????????????????????,?????????????????,?????????????,???????????????????

20. ???? ??????? 20 ????? ??5 kHz??????0.3 ms?50 ms????????????,?????????????????????,???????,??????????????????? ?????300 Hz????????????????,????????????(Ferro-resonance)?????????,??????????????????????

21. ???? ??????? 21 2.8 ????? ?????(Voltage unbalance)??????????????????????????120?,??????????? ??????,????????????????,?????????????????????????V-V???????,?????????????,????????????????

22. ???? ??????? 22 ?????

23. ???? ??????? 23 2.9 ???? ???????????????????????(DC offset),???????????(Geomagnetic disturbance)???????????????,????????????,??????????????????????,????????? ??????????????????????????????????????????

24. ???? ??????? 24 2.10 ?? ????????????,?????????(Harmonics),????????????????????????,??????????,????60 Hz????????????????,??????????

25. ???? ??????? 25 ?? ?????????????????????(??????????),?????????????????(?????????????????),??????????????????????,????????????????????,?????????????

26. ???? ??????? 26 ??

27. ???? ??????? 27 2.11 ????????? ????????????????????,???????(Interharmonics),?????????????(Cyclo-converter)??????????????

28. ???? ??????? 28 ????????? ???????????Hz?25Hz???,??????????,?????????????? ??????????????????,?????????????????????,??????????50?60 Hz???????????,????????????????,????????????????????????,???????????????????(Subharmonics),????????????????

29. ???? ??????? 29 ?????????

30. ???? ??????? 30 2.12 ???? ????(Notching)?????????????????(Commutation)????????????????? ?????????????????????????????????????????,???????????;????????,??????????????????????????

31. ???? ??????? 31 ???? ??????????????????????????(Zero-crossings)???????????????????????????,??????????????????????????2.8?????????????????

32. ???? ??????? 32 ????

33. ???? ??????? 33 2.13 ????????? ??????????????,???????????0.95?1.05??,???????????(Voltage fluctuations)?????,??????????(Reactive component),??????,????????????

34. ???? ??????? 34 ????????? ????????????????????,?????????(Voltage flicker),??????????????,??????????????????????????????,???????????,?????????????????(Light flicker)? ?????????????????????,????????????????????,?????????

35. ???? ??????? 35 ?????????

36. ???? ??????? 36 ?????????

37. ???? ??????? 37 2.14 ?????? ???????????,????????????????????????????,???????????????? ??????????????????????????,???????(Governor)?????????????,????????????

38. ???? ??????? 38 ?? ??????????????????,????????????,????????????????????????????? ???????????????????????,???????????? ????????????????????????,??????????????,????????????,??????????

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