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- The positive sequence and negative sequence currents of the fault phase are analyzed , the mathematical model of stable fault character of stator winding's inter-tttm short circuit are built. 基于复合序网对一台大型汽轮发电机并列运行时匝间短路的故障量进行计算,将特征数据输入神经网络进行识别。
- positive sequence current 正序电流
- The resulting current reference equals to the difference between the instantaneous current of nonlinear load and its fundamental positive sequence active component. 所求得的补偿电流指令为非线性负载电流中除了基波正序有功分量之外的全部电流分量。
- The voltage regulation characteristic of autotransformer,external compensation of zero sequence current for three Y au . 论证自耦变压器的电压调整性能、三Y型自耦变压器的零序电流外补偿、自耦变压器继电保护整定的特殊问题。
- This work successfully develops a new intelligent HIF detector that adopts 3I0 zero sequence current to solve HIF problems in aerial lines. 本论文成功地开发一种新的智慧型高阻抗故障侦测器,它利用3I0零序电流侦测架空线的高阻抗故障。
- The pulse steering circuit so designed solves fairly well the transition between positive sequence and negative sequence. 所设计的脉冲导向电路较好地解决顺序与逆序互相之间的过渡问题。
- The zero sequence current transformer is full enclosed type. The secondary windings and iron core are insulated by epoxy resin. The middle hole is used for cable going through. 本型零序电流互感器为全封闭式。二次绕组及铁芯均浇注在聚脂树脂内。中间窗孔供三相电缆穿过。
- Aiming at false wiring of negative sequence current relay, analyzes the reason, treatment and second loop grounding unreasonable of maloperation from practice and theory. 针对一起负序过电流继电器误解线的典型事故,对保护误动作的原因、处理方法及二次回路接地不合理等问题,从实践和理论方面进行了深入地分析。
- The zero sequence impedance of the cable changes with the zero sequence current as the zero sequence current flows in the ground and the sheathing simultaneously. 电力电缆的零序阻抗随零序电流的大小而改变,如果采用恒定值的零序阻抗来进行零序电流保护的整定,容易导致保护的不正确动作。
- Using centralized control mode, the method centralizes zero sequence current (ZSC) of each branch switch to a device.The device controls each branch switch and main switch. 它采用集中控制模式,把各支路开关的零序电流集中到一个设备内,设备同时控制各支路开关和总开关。
- A phase A fundamental positive sequence voltage selected unit based on LPF substitutes for the original ip-iq PLL to ensure exact voltage of A phase is selected even in case of imbalance three phase voltage. 并采用一种新颖的基于低通滤波的A相正序电压提取单元来代替原始的ip-iq检测法的PLL锁相环,在三相电压畸变情况下仍可以正确提取A相正序电压,以精确检测出谐波和无功电流。
- Considering the imbalance of three phase voltages,a new arithmetic which verifies the generator paralleling based on the synthetic phasor of positive sequence fundamental voltage is proposed. 考虑到三相电压或多或少有些不平衡,提出了一种新的基于正序基波电压合成相量的发电机并网条件核算法。
- Yueqing Zhengda Soft Magnetic Alloy Co.,Ltd is a high-tech company that mainly produces ultra-crystallite (nanometer cryst-allite) material,ultra-crystallite magnetic core,current transformer,Zero sequence current transformer,toroidal transformer. 乐清市正大软磁合金有限公司,是一家专业生产超微晶(纳米晶)带材,超微晶磁芯,电流互感器,零序互感器,环型电感的高科技、软磁公司。
- Analysis and simulation are carried out with the four-arm inverter, the simulation results verify that the APF with one-cycle control can dynamically and effectually compensate the harmonics, reactive current and zero sequence current. 在对四桥臂变换器的三相四线制有源滤波器进行分析、建模的基础上,进行了仿真研究,仿真结果表明单周控制三相四线制有源滤波器能有效地补偿系统谐波、零序和无功电流,而且响应快、补偿性能好。
- There is positive proof that he did it. 有确切的证据证明他做了此事。
- The results of experiment and simulation indicate that harmonics,negative and zero sequence current in three phase and f our wire system could be compensated by two types of main power circuits. 实验和仿真结果表明,这两种不同形式的主电路有着各自的特点,均可对三相四线制系统中的谐波、负序及零序电流进行补偿。
- Used the six-sequence fault component,the action of some phase selectors,including the phase current difference suddenly-change and the sequence current were analyzed in this paper. 本文利用六序故障分量法分析了零序负序电流选相元件和相电流差突变量选相元件在同杆双回线跨线故障下的动作行为。
- AR models are built up for positioning sequence based on "sliding window" method.Measuring variance is evaluated through RLS method based on forgetting factor. 基于“滑动窗”处理方法对定位序列建立AR模型,采用遗忘因子递推最小二乘法估计出测量方差。
- additional positive sequence network 正序附加网络
- Absolute Positive Sequence Phase Angle 绝对正序相角