供配电系统通常接有并联补偿电容器,配电网中的高次谐波对电容的影响很大。
Power Supply System is often placed with shunt compensation capacitors and the upper harmonic waves in the distribution network have much influence on the capacity.
以无功电流差补值作为控制参量,并以高次谐波电流作为谐振保护信号,由专家系统给出投切无功补偿电容的控制指令。
Then, adopting reactive current margin and harmonics as control and protection variable, an expert system was formed to control thyristor switched capacitor.
讨论了第一临界情形下的平面三次系统高次奇点的局部拓朴结构,并给出利用多项式系数的判断准则。
This paper discuss the locally topological structure of higher order singular point for the plane cubic system in the first critical case and give a criterion by the coefficients of polynomials.
通过对轨道交通供电系统高次谐波产生原因及危害的分析,着重探讨对供电系统谐波抑制的措施。
Through reason and harm analysis which produces to the rail transit power supply system higher harmonic, discusses emphatically to the power supply system harmonic suppression measure.
通过计算机仿真及试验证明,该有源电力滤波系统能很好地同时抑制电网中的高次谐波及无功电流。
Computer simulation and experiments show that the active power filter system can effectively suppress the high frequency harmonics and reactive currents at the same time.
电网中的高次谐波对电网有污染,抑制高次谐波是电力系统运行中的重要研究课题。
High frequency harmonic in electric power network can pollute the network, control high frequency harmonic is an important research problem in electrical system function.
因而,系统不但出现高次谐波,而且还将出现亚谐波及。
So not only super-harmonic, also subharmonic and stochastical oscillation will appear.
本文应用直线法理论严格推导了在极坐标系统中分析任意截面形状同轴线高次模的公式。
A set of formulas for analyzing high order modes of coaxial lines with arbitrary section in polar coordinate by the method of lines are rigorously derived in this paper.
求解高次实系数代数方程的根,对于控制系统的分析和综合设计有着重要意义。
Solving the algebra equation with real-coefficients of nth degree is of great importance for analysis and synthesis of a control system.
该仪器体积小、功能强、精度高,可以广泛适用于电力系统及相关行业继电保护和计量专业、工矿企业、石油化工、冶金企业的二次回路检查。
It is very convenient for the field operators and can be used as a secondary meter in mining industry, the petroleum chemical industry, the metallurgical industry.
本文研究了高次谐波产生及非谐振子模型两种非线性光学系统中存在光场振幅立方压缩的条件。
The conditions for the production of amplitude-cubed squeezing in higher-order harmonic generation and an anharmonic oscillator are studied.
受潜水面阶段性上浮,相对高的古地貌上发育多期次岩溶洞穴系统。
Phased by diving surface rise, relatively high paleogeomorphology developed karst cave system in many times.
在一次性高值耗材管理流程中,我院采取了“使用明细表”与HIS系统相配合的办法。
In the process of the management of the high value medical disposable materials, our hospital adopts the method of the combination of the use bill and HIS.
电力系统中网络结点千百个交织密布,有功潮流、无功潮流、高次谐波、负序电流等以光速在全系统范围传播。
Power system Network Node thousands of mixed clouds, active power, reactive power flow, high harmonics, negative sequence current of the speed of light in the system-wide communication.
煤矿安全监控系统通信实时要求高,单次通信量小,非常适合采用CAN总线。
In coal mine, the real-time requirement of communication of safety monitoring system is critical and each communication traffic is little, so the system is suited for CAN Bus.
萃取、分离一次完成,系统采用全自动化设计,生产效率高;
Extraction and separation once completed, the system adopts the whole design automation, high production efficiency;
基于有限衍射波束的高帧率超声成像系统能实现快速成像,但由于仅通过一次发射事件成像,信噪比较低,本研究针对该问题提出一种改进方案。
The poor image quality in the high frame rate (HFR) ultrasonic imaging system is due to the fact that only one transmission event is used for constructing images.
讨论了第一临界情形下的平面三次系统高次奇点的局部拓朴结构,并给出利用多项式系数的判断准则。
The locally topological structure of higher order singular point for the plane quartic system in the first critical case is discussed, and a criteria by the coefficients of polynomials is given.
第一个是,用户可以发送到的公用设施系统中的高次谐波电流限制。
The first is a limitation in the harmonic current that a user can transmit into the utility system.
本发明有益效果为:成本较低、对高硬度、高硅含量的水阻垢处理效果好、对膜系统不会造成二次污染。
The invention has the advantages of lower cost, good treatment effect to water obstruction scales with high hardness and high silicon content and no secondary pollution to a film system.
本系统采用一步一步法制备微丸,操作简便,一次性合格率高,本机特别适合大生产选用。
This system adopts one step by one step method to make micro pellets. Its operation is flexible and convenient and high rate of quality in one-time, so it is suitable for big production.
除此之外,该系统可以承受一次百年一遇的大浪,承受超过30米的浪高、不高于60%的压力许可值以及小范围的最大加速度。
The system will also withstand a single maximum 100-year wave height of above 30m with stress levels below 60% of permissible and with small maximum accelerations.
除此之外,该系统可以承受一次百年一遇的大浪,承受超过30米的浪高、不高于60%的压力许可值以及小范围的最大加速度。
The system will also withstand a single maximum 100-year wave height of above 30m with stress levels below 60% of permissible and with small maximum accelerations.
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