The optimal design of large transformers with combinatorial optimization and with the reactance voltage drop as the constraint is described.
本文运用组合优化方法进行大型变压器的优化设计,提出了电抗约束判别条件。
A calculation method of deriving the reactance voltage of multi-oil ducts cylindric winding is introduced by using relative magnetic leakage method. And the calculation examples are given here.
介绍了一种用相对漏磁法推导几种多油道圆筒式绕组的电抗电压的计算方法,并给出了计算实例。
Through deduction and analysis, the conclusion can be made: low reactance at the neutral point of transformer has little effect on the switching over-voltage in power systems.
通过计算和分析表明:变压器中性点接入小电抗对系统的操作过电压基本不会产生影响。
The theory of fault locating by calculating the reactance of feeder line with measured fault current and voltage is introduced.
介绍了利用故障电压和故障电流计算故障回路电抗值的电抗法故障点定位的原理。
In this paper, the effect of the neutral grounded by the low reactance on switching over-voltage in the power system is studied.
文章就中性点小电抗的接入对系统的操作过电压的影响进行了研究。
Company main products: Voltage stabilizer, high low pressure transformer, reactance implement.
公司主要产品:稳压器、高低压变压器、电抗器。
By means of the proposed algorithm the sensitivity of nodal voltage to any network parameter can be obtained, such as line reactance, variation of reactive power of power grid and so on.
通过该算法可得到节点电压对任何网络参数的灵敏度,比如线路电抗、电网无功功率的变化等。
Considering the sensitivity of virtual nodal voltage to line reactance and variation of reactive power of power grid comprehensively, the voltage instability index is put forward.
综合考虑节点电压关于线路电抗和系统无功功率变化的灵敏度,提出了电压失稳指标。
When the reactance value of current limiting reactor is selected, the short circuit current should be limited within the specified value and the voltage loss should not be too much.
限流电抗器电抗值选择时既要将短路电流限制到规定值,又不能使电压损失过大。
Based on the fundamental of electromagnetics, are summarily derived idle, load and short-circuit voltage as well as current and leakage reactance formulas.
并根据电磁基本原理推导出空载,负载和短路时的电压、电流和漏抗的计算公式。
The requirement for leakage reactance on stator of PMSM supplied by voltage type inverter is analyzed, and some parameters are selected, such as electromagnetic load, slots shape of stator and so on.
分析了电压型逆变器供电的永磁同步电动机对定子漏抗的要求,确定了电磁负荷以及定子槽形等参数的选取原则。
The variety of current can be automatic compensated caused by undulating of voltage & secondary loop inductive reactance.
对焊接电流进行反馈恒流控制,自动补偿网压波动、二次回路感抗变化对焊接电流的影响;
In addition, equivalent series reactance of excitation transformer worsens the condition of the thyristor operation, and it can bring transient over-voltage at the moment of switching thyristor.
励磁变压器的串联电抗恶化了晶闸管的换相工作条件,并在晶闸管元件导通与关断瞬间引起危及到转子励磁绕组安全运行的过电压。
In addition, equivalent series reactance of excitation transformer worsens the condition of the thyristor operation, and it can bring transient over-voltage at the moment of switching thyristor.
励磁变压器的串联电抗恶化了晶闸管的换相工作条件,并在晶闸管元件导通与关断瞬间引起危及到转子励磁绕组安全运行的过电压。
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