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- A better tradeoff betw een the harmonics current detecting precision and dyn amic response of the instantaneous dectecting method ca n be achieved by carefully choosing the parameter of the low -pass fil-ter. 适当选择低通滤波器的参数,可以使谐波电流的检测既有较高的精度,又有较快的动态响应特性。
- WANG Zhi-hong,ZHENG Yu-ping,HE Jia-li.Calculating the ratio of the harmonics current to recognize the CT's saturation in numeric busbar protection [J].Proceedings of the EPSA,2000 ,12( 5 ) : 19-24. [2]王志鸿;郑玉平;贺家李.;通过计算谐波比确定母线保护中电流互感器的饱和[J]
- The first is a limitation in the harmonic current that a user can transmit into the utility system. 第一个准则是限制用户可送入用电系统的谐波电流。
- Keywords :shunt active power filter, harmonic current, iterative learning controller (ILC), nonlinear load. 关键词: 并联式有源滤波器;谐波电流;迭代学习控制;
- In HVDC system, It is meaningful to search for a new way to mearsure the harmonic current. 在高压直流输电系统中,研究运用新的测量谐波电流的方法和技术有着重要的意义。
- The parallel APF compensates the remained harmonic current and fundamental current losses. 进入电网的残余谐波电流以及由于参数波动引起的基波电流损失由并联型APF补偿。
- Especially in electrical railway, because of tractor locomotives' to and fro and particularity of electrical load, it is always hard to superpose multi-tractors' harmonics currents. 具体到电气化铁路运输方面,由于牵引机车的往复和电气负荷的特殊性,对多机车负荷系统谐波电流的叠加一直是一个难以确定的课题。大量的专家和学者在这方面做出了长期的努力。
- It is found that the electron beam may approach ideal bunching, each harmonic current of thebeam may reach about 5. 发现在二极管与共振腔结合的系统里,电子束可实现理想群聚,各次谐波电流在非相对论条件下可达到初始电流的5。
- With the analysis of the harmonic current and power factor of Rectification set of Mine Hoist,the way of filter design is introduced. 分析国内某矿井提升机整流供电系统网侧谐波电流和功率因数情况,介绍滤波器设计的方法。
- With the analysis of the harmonic current and power factor of Rectification set of Mine Hoist, the way of filter design is introduced. 摘要分析国内某矿井提升机整流供电系统网侧谐波电流和功率因数情况,介绍滤波器设计的方法。
- Detecting the harmonic current and reactive current (pq method) based on the instantaneous reactive theory is suitable in the APF device. 本文采用基于瞬时无功理论的pq法检测谐波电流和无功电流,克服了传统谐波电流检测方法实时性能差的缺点,并且容易实现。
- The computation of harmonics superposition becomes more complicated when harmonic currents are caused by multi-harmonic sources at random phase angel. 大量的非线性负荷应用在农村配电网中,在农网中出现了多谐波源的现象。
- A method which detects harmonic current of three-phase system with DSP based on theory of instantaneous reactive power is presented in this paper. 根据瞬时无功理论,提出基于DSP的谐波电流检测方法,实现了谐波电流和无功电流的实时、快速检测。
- K.A.Buckle and J.W.Luce, “Battery vehicle charger design eliminates harmonic current generation,” Proceedings of the IEEE,1996, pp. 561-564. 沈里和;“数位化正负脉冲急速充电器之研制;”国立成功大学电机工程学系硕士论文,2002年.
- In addition, the inverter can also reduce the harmonic current and torque pulsation for PMSM in the fully adjustable speed range. 在永磁式同步电动机侧不仅达到调速的控制,亦能降低电动机电流谐波含量,以减少脉动转矩。
- Zhao, Q., F.C.Lee and F.S.Tsai,“Design Optimization of an Off-Line Input Harmonic Current Corrected Flyback Converter, IEEE APEC, pp. 91-97, 1999. 刘智豪,“单级隔离式高功因电力转换器之模式分析及控制器设计”,硕士论文,国立成功大学工程科学系,2000。
- Passive Filter is used to suppress the harmonic current of the power system, and it has become a primary method for the arc furnaces. 作为一种重要的谐波源,电弧炉严重影响着电力网络和电气设备以及通信和电子设备的安全和经济运行。
- Demand is outstripping current production. 现在需求逐渐超过了生产能力。
- She broadcasts on current affairs. 她发表时事广播演说。