您要查找的是不是:
- Based on wavelet transform and multiresolution analysis, a new method to distinguish transformer inrush current from its internal fault current is proposed. 提出一种基于小波变换和多分辨分析识别变压器励磁涌流和内部故障电流的新方法。
- Discrimination of transformer inrush current and inner short circuit current with wavelet energy spectrum diagrammatic method 识别变压器励磁涌流和内部短路电流的小波能量谱图解法
- transformer inrush current 变压器励磁涌流
- The calculation result shows that this method is able to detect transformer internal fault and magnetizing inrush current correctly. 计算结果表明该方法能可靠识别内部故障和励磁涌流,效果明显。
- So precise description of ferromagnetic elements" magnetization characteristic is the base of setting up accurate inrush current model of transformer. 因此,对铁心材料磁化特性的准确描述,是建立精确的变压器励磁涌流模型的基础。
- How to discriminate between internal fault and magnetizing inrush current is the difficulty of transformer protection when apply differential relay. 变压器主保护选择差动在原理上存在不足,带来的问题就是如何准确鉴别励磁涌流与内部故障,这也是目前变压器保护的难点。
- Because of ferromagnetic elements, magnetic induction B and magnetic field H is non-linear, which is the main cause that high inrush current occur during the transformer energisation. 由于变压器铁磁材料的作用,磁感应强度B和磁场强度H呈非线性关系,这也是变压器空载合闸时产生较大励磁涌流的主要原因。
- For the transformer protection, the inrush current simulations and characteristic analysis are done. The new differential protection principle based ratio-restraint character is explained. 变压器保护重点介绍不同励磁涌流波形的仿真、特性分析及其比率制动差动保护的新原理和新判据。
- The extending techniques such as vector transform, excitation inrush current , TA saturation and so on are analyzed, which resolves the question that the traditional optical differential protection can not satisfy the request of line-transformer unit. 同时对光纤差动保护运用于线路变压器组时涉及的矢量变换、励磁涌流、TA饱和等延伸技术进行了分析,解决了传统的线路光纤差动保护不能满足线路变压器组保护的要求。
- As a result, voltage sag compensator will suffer from the significant the inrush current. 瞬间的涌浪电流对于电压骤降补偿器造成很大的负担。
- As the inrush current and the precision of the equipments,protection misoperation occurs frequently. 但由于励磁涌流及保护装置精度地影响,差动保护装置容易产生误动。
- The expenriment shows that this equipment is fast response, highprecision and without inrush current input. 试验表明:该设备响应快,精度高,实现了无涌流投入。
- NTC1 is a negative temperature coefficient (NTC) resistance, used here for limiting the inrush current at cold start. NTC1(NTC)抵抗负温度系数,用这里在冷开始时候限制那些合闸电流。
- Inrush current is about with the theory of differential protection ,but research exotericas of it is used difficulty in fact. 励磁涌流涉及到差动保护的原理问题,是当前研究地热点之一,但多停留在理论层面。
- Digital simulation shows that the proposed method can distinguish internal fault from external fault, magnetizing inrush current, normal operation. 经仿真计算验证,该方法能有效地区分内部故障和励磁涌流、外部故障及正常运行状态。
- An inrush current limiter circuit (20) includes a detection circuit (30) that produces a control signal (VDRIVE) from a sense current (ISENSE). 一种浪涌电流限制器电路(20)包括检测电路(30),其根据感测电流(ISENSE)产生控制信号(VDRIVE)。
- Zhang Xuesong,He Benteng.A new method to identify inrush current by phasor comparison[J].Proceedings of the CSEE,2005,25(19):43-47(in Chinese). [3]张雪松;何奔腾.;变压器励磁涌流的相移比较鉴别方法[J]
- It is found that the two parameters aren"t influenced by external fault and magnetizing inrush current, which ensures good selectivity. 理论上分析可以得到,这两个参数不受外部故障和励磁涌流的影响,因此具有很好的选择性。
- A new method, based on the analysis of frequency spectrum of instantaneous power, for the discrimination between internal fault currents and inrush currents in transformer is proposed. 在分析瞬时功率频谱特性的基础上,提出了一种基于瞬时功率的变压器励磁涌流和内部故障电流识别新方法。