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2021-01-05
How to choose the reactance rate of series reactor?
- Categories:Industry news
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- Time of issue:2021-12-31
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(Summary description)(1) The background harmonic at the connection point of the capacitor device is 3rd (when the background harmonic at the connection to the power grid is 3rd and above, it is generally 12%; 4.5% to 6% and 12% can also be used. reactance rate.)
（1）电容器装置接入处的背景谐波为3次 (当接入电网处的背景谐波为3次及以上时，一般为12%；也可采用4.5%～6%与12%两种电抗率。) 1)3次谐波含量较小，可选择0.1%～1%的串联电抗器，但应验算电容器装置投入后3次谐波放大是否超过或接近国标限值，并且有一定的裕度。 2)3次谐波含量较大，已经超过或接近国标限值，选择12%或12%与4.5%～6%的串联电抗器混合装设。 (2)电容器装置接入处的背景谐波为3次、5次 1)3次谐波含量很小， 5次谐波含量较大（包括已经超过或接近国标限值）
（1）电容器装置接入处的背景谐波为3次 (当接入电网处的背景谐波为3次及以上时，一般为12%；也可采用4.5%～6%与12%两种电抗率。)
1)3次谐波含量较小，可选择0.1%～1%的串联电抗器，但应验算电容器装置投入后3次谐波放大是否超过或接近国标限值，并且有一定的裕度。
2)3次谐波含量较大，已经超过或接近国标限值，选择12%或12%与4.5%～6%的串联电抗器混合装设。
(2)电容器装置接入处的背景谐波为3次、5次
1)3次谐波含量很小， 5次谐波含量较大（包括已经超过或接近国标限值）
How to choose the reactance rate of series reactor?
(Summary description)(1) The background harmonic at the connection point of the capacitor device is 3rd (when the background harmonic at the connection to the power grid is 3rd and above, it is generally 12%; 4.5% to 6% and 12% can also be used. reactance rate.)
- Categories:Industry news
- Author:
- Origin:
- Time of issue:2021-12-31
- Views:0
Information
(1) The background harmonic at the connection point of the capacitor device is 3rd (when the background harmonic at the connection to the power grid is 3rd and above, it is generally 12%; 4.5% to 6% and 12% can also be used. reactance rate.)
1) The 3rd harmonic content is small, and a series reactor of 0.1% to 1% can be selected, but it should be checked whether the 3rd harmonic amplification exceeds or is close to the national standard limit after the capacitor device is put into use, and there is a certain margin.
2) The 3rd harmonic content is relatively large, which has exceeded or is close to the national standard limit. Choose a series reactor of 12% or 12% and 4.5% to 6%.
(2) The background harmonics at the access point of the capacitor device are the 3rd and 5th times
1) The 3rd harmonic content is very small, and the 5th harmonic content is relatively large (including exceeding or close to the national standard limit), choose a series reactor of 4.5% to 6%, and avoid using a series reactor of 0.1% to 1% .
2) The 3rd harmonic content is slightly larger, and the 5th harmonic content is smaller. Choose a series reactor of 0.1% to 1%, but it should be checked whether the 3rd harmonic amplification exceeds or is close to the national standard limit after the capacitor device is put into operation, and There is a certain margin.
3) The 3rd harmonic content is relatively large, which has exceeded or is close to the national standard limit. Choose 12% or 12% and 4.5% to 6% series reactor mixed installation.
(3) The background harmonic at the access point of the capacitor device is the 5th order and above
1) The 5th harmonic content is small, and a series reactor of 4.5% to 6% should be selected.
2) The 5th harmonic content is relatively large, and a 4.5% series reactor should be selected.
3) For series reactors using 0.1% to 1%, it is necessary to prevent serious amplification or resonance of the 5th and 7th harmonics; for series reactors using 4.5% to 6%, it is necessary to prevent the 3rd harmonic. Severe amplification or resonance.
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