电网

But the filtering performance is sensitive to the detuning caused by the change of system frequency and filter' s parameters.

但是，调谐滤波器的滤波效果对电网和滤波器参数的变化比较敏感，随着运行频率的变化和设备老化，滤波器的滤波性能变差。

The article synopsis introduced the characteristics of the conjecture instrument and it is soft, the hardware system structure, the point introduced a virtual instrument technique in the diagraph in the charged barbed wire net parameter, the software mold piece included electric voltage, the electric current measure, the power diagraph and phase shift diagraphs.

文章简要介绍了虚拟仪器的特点及其软、硬件系统结构，重点介绍了虚拟仪器技术在电网参数中的测量，软件模块包括电压、电流测量、功率测量及相位差测量。

With smart grids there should be no need to send out lorries and ring doorbells when the power fails.

有了智能电网，停电事故发生时，就没有必要派出维休车辆，敲别人门铃。

With smart grids, there should be no need to send out lorries and ring doorbells when the power fails.

有了智能电网，停电事故发生时，就没有必要派出维修车辆，敲别人门铃。

Investigation on tower collapses of 500 kV Renshang 5237 transmission line caused by downburst .

华东电网500 kV任上5237线飑线风致倒塔事故调查分析。

Research on the status of the applications of superconductor current limiter and solid current limiter based on FACTS techniques was followed by various application schemes proposed for applying series resonant current limiter in extra high voltage grid.

对超导型和基于FACTS技术的固态故障限流器的应用状况进行了研究，提出了在超高压电网中串联谐振式限流器的几种应用方案。

The series resonant type fault current limiter is a new technology to limit the excessive short-circuit current of the extra high voltage power grid.

采用串联谐振型故障电流限制器(fault current limiter，FCL)是解决超高压电网短路电流超标问题的一种新技术手段。

With the power load s rapid growth,the urban power grid construction scale s continual extension,the urban transformer has to provide cable feeder,and 10kV system single-phase ground capacitance-current increases.

本文对城市电网10 kV系统中曲折变容量选择问题进行了分析，并系统地介绍了三种不同用途的曲折变容量选取方法。

In order to deal with complex tree-type structure of feeders, a smart reliability calculation method is developed.

在配电网可靠性计算中，实现了一种非常灵活的可靠性算法，能够处理结构任意复杂的树型馈线。

Lightened on the turbine valve controller designed with feedback linearization theory and introduced nonlinear tracking-differentiator, a novel nonlinear PID valve controller was proposed. This controller can fit not only to plant with some model error and random disturbance in variable, but also to the variety of the structure and operating conditions of power system. The transient and dynamic characters of the controller are both satisfactory when big and small disturbances added. The good performance, wide stable margin and heavy robustness of the valve controller proved that it is a great practical application to enhance the stability of power system.

结合反馈线性化法汽轮发电机组的汽门控制研究成果，引入非线性跟踪微分器和非线性度变换控制，进行了发电机组的非线性PID汽门控制器设计，该控制器不仅能适应一定的系统模型误差与变量的不确定性干扰，而且对于电网结构和运行工况的变化有着较强的适应能力，在受大、小扰动的情况下，呈现了较好的暂态特性和动态品质，具有较好的控制品质、较高的稳定裕度和较强的鲁棒性能，有利于进一步改善电力系统的稳定性，显示了其较强的实用性。

According to the clear water experiment, aeration performance of the new equipment is good with high total oxygen transfer coefficient and oxygen utilization ratio.

曝气设备的动力效率在叶轮转速为120rpm～150rpm时取得最大值，此时氧利用率和充氧能力也具有较高值。

The environmental stability of that world - including its crushing pressures and icy darkness - means that some of its most famous inhabitants have survived for eons as evolutionary throwbacks, their bodies undergoing little change.

稳定的海底环境─包括能把人压扁的压力和冰冷的黑暗─意谓海底某些最知名的栖居生物已以演化返祖的样态活了万世，形体几无变化。