| TV开口三角绕组配置25n消谐电阻 |
| 添加时间：2019/1/25 8:39:29 浏览次数： |
| 随着系统对地电容的增大,电压互感器磁饱和后将依次发生高频、基频和分频谐振。TV的开口三角绕组上,用于消除分频谐振的阻尼电阻r值最小,只要按此来选择电阻就可同时消除另外2种谐振。 With the increase of system capacitance to ground, high frequency, fundamental frequency and frequency division resonance will occur successively after voltage transformer saturation. On the open trchengdu.89ix.com guizhou.89ix.comkunming.89ix.com hangzhou.89ix.comnanchang.89ix.comguangzhou.89ix.comiangle winding of TV, the R value of the damping resistance used to eliminate the frequency division resonance is the smallest, so the other two resonances can be eliminated at the same time if the resistance is selected according to this value. 对于在开口三角绕组配置了25欧消谐电阻的TV,当系统中中性点直接接地的普通电磁式TV不超过2台时还可以消除基频谐振,但若要消除分频谐振则阻值偏大,失去消谐作用。为此,应加装微机消谐装置,同时宜保留原消谐电阻,以利于限制空母线合闸时工频位移电压。 For TV equipped with 25 Euro harmonic elimination resistance in open triangle winding, the fundamental frequency resonance can be eliminated when the neutral point of the system is directly grounded by no more than 2 ordinary electromagnetic TV, but if the frequency division resonance is eliminated, the resistance value is too large and the harmonic elimination effect is lost. Therefore, it is necessary to install a micro-computer harmonic eliminating device and keep the original harmonic eliminating resistor in order to restrict the power frequency displacement voltage when the empty bus closes. |
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