功

When the electricity power system runs correctly, the excitation control system maintains the voltage of the generator and the whole system, distributes the wattless loads equitably over the generators, improves the steady-state stability and the dynamic stability of the electricity power system.

在电力系统正常运行的情况下，维持发电机或系统的电压水平；合理分配发电机间的无功负荷；提高电力系统的静态稳定性和动态稳定性[1]。

In the field of measurement and display, it ranges from ampere meter, Voltage Meter and fault current state directives to power factor, wattful power, wattless power, frequency, and even harmonics, the fault condition wave acquisition, and so on.

在测量、显示这块，如电流表、电压表、故障电流及状态指示，以及功率因数、有功功率、无功功率、频率，甚至谐波，故障状态的波形捕捉等等。

What's more, when the transformers in ringed networks are not matching, it will cause the ringed network a loop potential, then the circulating power is existed which also produce wattless circumfluence.

造成无功环流的原因各不相同，有的源于规划，有的是由于管理体制，有的由于运行方式，有的只是环网中各变压器的变比不匹配引起环网中存在环路电势，进而引起循环功率。

With operating the excitation control system with PLC, this design maintains the terminal voltage of the generator and the whole system, distributes the wattless loads equitably over the generators, makes sure that the generator works normally and the electricity power system functions savely.

本设计通过用可编程控制器控制发电机的励磁系统，来稳定发电机的机端电压，并稳定地分配机组的无功功率，来满足发电机正常发电及电力系统安全运行的需要。

The author did the tracking test to four kinds of exist using energy-saving motors of sucker rod pumps,compared and analysed the tested data on the wattless losses,wattful power,single consume to output of fluid,energy-saving rate and average system efficiency of pump units.

跟踪测试了孤东油田目前在用的4种有杆抽油机节能电机，利用科学、准确的实测数据，从无功损耗、有功功率和产液量单耗、节电率、抽油机平均系统效率等方面进行了对比分析。

The energy-saving tug unit of the pump unit,its wattless loss is the least,it has the largest energy-saving rate,it has the best applying result,compared with the former ordinary motor its energy-saving rate reaches 36.8%.

而抽油机节能拖动装置其无功损耗最小，节电率最大，产液量单耗降低率最高，应用效果最佳，与原普通电机对比其节电率可达36.8%。

Electric motor wattless compensation energy-saving

电动机；无功补偿；节能

This paper advances the idea of measuring power of three-phase load,by using one Wattmeter,and draws circuit.

系统研究、总结了通过使用一只瓦特表测量得出三相负载的总有功功率和无功功率的思路，并给出接线电路图。

Being one of the earliest certified software enterprises,quite a few of Waygoing's products acquired software copyright and software copyright and software product registered certifications.

伟功自主开发的产品有："HCA软交换系统"、"IP网守系统"、"VoIP电话系统"和"MG媒体网关"、"waygoing网络电话"、"IP多媒体软电话"等，经信息产业部电信研究院等相关权威机构专家的评定，系统及产品已达到国际同类项目的先进水平；一些项目2002年即被上海市科委认定为上海市高新技术成果转化项目，以及获得科技成果认定证书并被纳入上海市政府信息技术创新计划；多项产品获得了软件著作权和软件产品登记证书，是上海市早期认定的软件企业之一。

Shanghai Waygoing Communication Technology Co.Ltd,invested by Shanghai ITVC and Shanghai VC Co.Ltd,is a promising new high-techenterprise,specialized in researching and developing NGN application products involving SoftSwitch,IP phone,IP Video phone,Instant Message and other value-added Application Services and technologies.

公司简介：上海伟功网络通信技术有限公司是一家新兴的高新技术企业，专门致力于开发下一代网络技术应用产品，注册于上海张江高科技园区，投资主体为上海市信息技术基金何上海市创业投资基金。

Cynanchum Lingtai apricot production in the average weight 65 grams, the brightly-colored fruit, juicy rich, sweet-sour taste, sweet from the nucleolus, when the late Qing Dynasty famous Shaanxi, Gansu provinces, the Qing imperial court Tongzhi tribute for years.

灵台生产的牛心杏平均单果重65克，果实色泽鲜艳，汁多味浓，甜酸适口，离核仁甜，清末时就驰名陕、甘两省，清同治年间曾为朝廷贡品。

Chenopodium album,Solanum nigrum, and Amaranthus retroflexus were very susceptible to the herbicides. Polygonum persicaria and Abutilon theophrasti were relatively less susceptible to the herbicides, and Lycopersicon esculentum was not susceptible to it. The relationship between reduction rates of weed biomass and PPM values of weed leaves 2,4, and 6 days after treatment was established.

供试的6种杂草对该混剂的敏感性存在显著差异：红心藜Chenopodium album、龙葵Solanum nigrum和反枝苋Amaranthus retroflexus对该混剂最敏感，ED90值分别为47.65、71.67和29.17g/hm2；春蓼Polygonum persicaria和苘麻Abutilon theophrasti敏感，ED90值分别为96.91、114.20g/hm2；而番茄不敏感。