查询词典 influence power

In this way, the precision and the real time of calculation of the aberrance will influence the effect of the compensation. However, it is puzzle to calculate aberrance of instantaneous voltage and current on power net in real time.

这种模式下，畸变量的实时检测是一个问题，特别是对于事先未知扰动量的电网来说，无延时地检测计算出畸变量是一个难以解决的问题。

In China, websites of C2C E-commerce abound, but few of them have the power to influence the market.

在中国，C2C电子商务的网站众多，但真正具有市场影响力的网站不多。

In addition, by count of vibration power the influence of the vibration frequency on driving power is analysed.

通过振动装置的功率计算，分析了振动频率对驱动功率的影响。

Because the variations of wind speed and direction are random, with more and more proportion of wind power in power system, the influence of electric energy quality caused by voltage fluctuation, distortion ratio and flickering become more and more bigger.

中文摘要：由于风速和风向变化具有随机性，随着风电容量在系统的中的比例越来越大，风电并网后引起的电压波动、畸变率和闪变对系统电能质量造成的影响也会越来越大。

But recent years, after the widely use of power electronics equipment and influence of special loads such as electric arc stove and electrized railroad, the pollution in power system became much serious than before.

但是，由于近年来电力电子设备的大量使用，以及电弧炉、电气化铁路等负荷的影响，使得电力系统中的污染不断加重。

Because sheet of the known that the leakage will bring the environment problems in early days the power station constructed, generally not adopt technical measure of defending seeping, the groundwater environment changed obvious influence by the ash water leakage, the paper take the ash field of JiNing Power Station as an example, through the data contrast of the plain ash field water level and water quality in the time and on the apace, expresses that the groundwater of ash field district has already suffered pollution, generally, the scope of the pollution is in 1 kilometer.

由于早期电厂建设时对灰场渗漏引起的环境问题缺乏认识，一般不采以专门的防渗措施，灰水渗漏对地下水环境产生了明显的影响。论文以济宁某电厂灰场为例，通过对平原灰场水位、水质在时间和空间上的数据对比表明灰场区地下水已遭受污染，其污染影响范围一般小于1km。

ABSTRACT:In order to raise the power factor of distribution system with 1140V for oil-pumping units based on the analyzing the load performance , operation state ,existing problem and influence factor of oil-pumping units ,a reactor controlled reactive power compensation equipment has been developed .And The technology character ,using method and applying example have been introduced in detail

为提高油田采油系统1140V供电系统的功率因数，在对油田抽油机负荷特点和运行状态，以及抽油机电动机无功补偿的存在问题，影响因素等进行详细分析基础上，研制了一种用电抗器控制无功的无功功率动态补偿箱，并详细介绍了补偿箱的技术特点，使用方法和实际应用情况。

The principle of the novel single-phase hybrid active power filter is described in detail. Based on the above analysis, Kalman filtering approach for estimation of harmonics is presented to improve the speed and precision of harmonic detection, and it also can avoid the influence made by voltage distortion on harmonic detection. A new current control strategy based on energy balance is presented to regulate the active part absorbing or releasing active power and control the inverter to produce current opposite to the harmonic current reflowing in injection branch, the above method combined with harmonic current tracking control that keeps the stabilization of dc-side voltage and improve the reliability of the system.

并详细分析了系统的滤波原理，提出了基于卡尔曼增益自调整的改进型动态谐波含量估计方法，能够快速准确的跟踪检测电网谐波电流，并且克服了电力机车等冲击性负荷引起的电网电压畸变对谐波检测精度的影响；提出了基于逆变器两侧能量平衡的电流控制方法使有源部分吸收或释放一定有功或无功功率及产生与注入支路回灌谐波电流相反的抑制电流，然后联合电网谐波电流跟踪控制以获得系统参考信号，保证了直流侧电压的稳定，提高了装置可靠性，增强了系统滤波性能。

Power transformer has a very significant influence to power system, enterprise's production and people's life.

变压器作为电力系统中非常复杂而且非常重要的设备，其工作状态对电力系统、企事业单位生产及居民生活具有十分重要的影响。

Power transformer, one of the most important devices, has a very significant influence to the security and stability of power system.

变压器是电力系统的重要元件之一，其工作状态对电力系统能否正常安全可靠地运行具有十分重要的影响。

The absorption and distribution of chromium were studied in ryeusing nutrient culture technique and pot experiment.

采用不同浓度K2CrO4(0，0.4，0.8和1.2 mmol/L)的Hoagland营养液处理黑麦幼苗，测定铬在黑麦体内的亚细胞分布、铬化学形态及不同部位的积累。

By analyzing theory foundation of mathematical morphology in the digital image processing, researching morphology arithmetic of the binary Image, discussing two basic forms for the least structure element: dilation and erosion.

通过分析数学形态学在图像中的理论基础，研究二值图像的形态分析算法，探讨最小结构元素的两种基本形态：膨胀和腐蚀；分析了数学形态学复杂算法的基本原理，把数学形态学的部分并行处理理念引入到家实际应用中。