Transformer Caused(变压器引起)研究综述
Transformer Caused 变压器引起 - In this paper, considering the voltage change of the leakage inductance of the step-up transformer caused by the load switching, a mathematical model of impedance isolated medium voltage UPS in off-grid operation is established, and its double closed-loop control strategy is proposed. [1] The variation of the ground potential of the AC power grid substation and the distribution characteristics of the neutral point DC current of the transformer caused by the stray current were calculated and analyzed. [2] Among them, the problem of the user relationship between the user meter and the transformer caused by the change of the transformer area and the change of the resident address is particularly serious, which directly affects the line loss assessment of the transformer area. [3]本文考虑负载切换引起的升压变压器漏感电压变化，建立了阻抗隔离中压UPS离网运行数学模型，其双闭环控制策略为建议的。 [1] 计算分析了杂散电流引起的交流电网变电站地电位变化及变压器中性点直流电流分布特性。 [2] 其中，因变压器区变化、居民地址变化而引起的用户电表与变压器的用户关系问题尤为严重，直接影响到变压器区的线损评估。 [3]
Main Transformer Caused 主变压器引起
This paper analyses a burning accident of main transformer caused by arc grounding overvoltage in 220kV substation, obtains fault recording information, points out fault causes and puts forward corresponding preventive measures. [1] Aiming at a case of backup protection action of main transformer caused by improper implementation of voltage regulation measures, this paper analyzes the uneven load distribution and increase of reactive power loss caused by improper adjustment of tap, and the analysis results are verified by PSCAD. [2]对一起220kV变电站电弧接地过电压引起的主变压器烧毁事故进行分析，获取故障录波信息，指出故障原因并提出相应的预防措施。 [1] 针对一起调压措施实施不当导致主变后备保护动作的案例，分析了分接头调整不当导致的负载分布不均和无功损耗增加，并通过PSCAD验证了分析结果。 [2]