查询词典 instantaneous power

The simulation results show that the vector control system based on this improved scheme has better dynamic and static performance. It solves a lot of problems such as larger error in the MRAS based on the back electromotive force when the motor runs across the zero speed and the instability based on the instantaneous reactive power in the regenerating mode and has high estimating precision.

仿真表明基于该方法的矢量控制系统动静态性能好，能有效解决反电动势模型参考自适应方法在速度过零点辨识误差大以及瞬时无功功率模型参考自适应方法在转速给定为负阶跃时转速不稳定问题，转速估计精度高。

It analyzes the principles of technology which consists of ip-iq harmonic current detecting method based on the instantaneous reactive power theory and the hysteretic control of compensating current method.

分析了基于瞬时无功功率理论的ip-iq谐波电流检测技术和电流滞环比较控制的补偿电流技术。

During the auto-control mixing,the parameters of the mixing process,such as rotor speed,filling factor,ram pressure and mix temperature have effect on the mix quality;and the effect of some parameters can be decreased by using instantaneous power control.

瞬时功率控制实质上是对混炼物料粘度的控制。1 瞬时功率控制分析粒状填料能否均匀分散在橡胶中虽然与填料粒子的大小、形状和表面状态有很大关系，但起决定作用的仍然是橡胶的粘度。橡胶粘度太大或太小对粒状填料在橡胶中的分散都不利。

From the perspective of minimum transmission losses, an instantaneous reactive power theory for systems with any number of phases and with or without neutral line is developed. Under the new definition, each quantity has its own physical meaning, and the zero sequence current can be decomposed into active and reactive components. Furthermore, a generalized compensation method for zero sequence current is developed.

从输电损耗最小的角度出发，提出了任意相无中性线或有中性线系统的瞬时无功功率理论，在新的理论下，每个量都有清晰的物理意义，且能分解出零序电流的有功分量和无功分量，并给出了通用的零序电流补偿方法，揭示了瞬时无功功率理论与传统平均意义下的无功功率理论的联系及本质区别，从而为研究HVDC-VSC及各种FACTS装置的无功功率控制奠定了理论基础。

P-q, d-q, unify power factor and instantaneous active current methods are analyzed and compared with each other.

并对p-q法，d-q法，UPF法和瞬时有功电流法进行了分析和比较。

Harmonic current; reactive current; instantaneous reactive power theory; matlab simulation

谐波电流；无功电流；瞬时无功功率理论；Matlab仿真

The instantaneous reactive current theory is suitable for harmonics detection. Finally, this equipment was successful applied in power substation.

本文最终研制完成了这套煤矿电网谐波综合治理装置，并成功实现了该装置在黑龙江省某煤矿电网的挂网运行。

Active power filter ; instantaneous harmonic current detection ; harmonic measuring ; virtual instrument ; LabVIEW

有源滤波器；瞬时谐波电流检测；谐波测量；虚拟仪器； LabVIEW

The paper introduces an improved harmonic and reactive current detecting method based on there-phase reactive current using instantaneous reactive power theory. By using matlab, simulation model is built, and the results show that this model can exactly detect harmonic and reactive current in time and it is feasible in DSP system.

本文在三相瞬时无功功率理论的基础提出了一种改进的单相无功电流检测算法，并建立了仿真模型，仿真结果表明：该算法可以及时、准确地检测出三相电路中的谐波电流和无功电流，同时也验证了此算法在DSP系统中的可行性。

Finally,this paper discusses the problems of neutral point control that exists in the three-level inverter, and adopts two methods to control neutral voltage balance namely judging power direction and detecting instantaneous current value.

最后论文还对多电平逆变器存在的中点电位漂移问题进行了讨论，并采用两种方法来实现中点电压平衡，即判别逆变器功率流向法和检测瞬时电流值方法。

Alternatively, the con- trollers can use the synchronous rectifier itself or loss- less inductor current-sensing methods to provide overload protection with lower power dissipation.

另外，康威特罗勒斯可以使用同步整流器本身或亏损减少电感电流检测方法，以提供低功耗过载保护。

Mr. Dauber's other Schatz hangs in his home movie studio.

多伯把沙兹的另一件作品挂在家里的电影室。