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In order to overcome the shortcoming of the passive power filter and parallel active power filter, a new parallel hybrid active power filter on base of the conventional parallel active power filter is proposed in this thesis.

本文针对无源滤波器和单独使用的有源滤波器的缺点，对传统的并联混合有源电力滤波器进行创新性改造，提出一种适用于大功率场合的谐波和无功综合治理的新型并联混合有源电力滤波器。

Owing to its small volume, light weight, high efficiency, succinct circuitry, high reliability and great capability of self-equalizing output loads in different circuitries, the Fly-back Converter becomes the optimally topological form of designing auxiliary power supply of high frequency switching power and driving power supply of power switching.

由于反激式变换器不但具有体积小、重量轻、效率高、线路简洁、可靠性高等优点，而且还具有较强的自动均衡各路输出负载的能力，目前反激式变换器的电路拓扑形式已成为人们设计高频开关电源的辅助电源以及设计各种功率开关驱动电源的首选。

The material series include JP series—MnZn power ferrite used for switching power supplies and other power conversion applications, JV series—MnZn power ferrite used for fly-back transformers in CRT color display systems, JH series—MnZn high permeability ferrite used for digital and analog communication and EMC field, JL series—MnZn low loss ferrite used for traditional communication filters and JR series—NiZn ferrite used for radio frequency fields.

材料方面包括用于开关电源和其它功率转换领域的锰锌功率铁氧体 JP 系列，用于 CRT 彩色显示系统回扫变压器的锰锌功率铁氧体 JV 系列，用于数字和模拟通讯及电磁兼容领域的锰锌高磁导率铁氧体 JH 系列，用于传统通讯滤波器的锰锌低损耗铁氧体 JL 系列和用于射频领域的镍锌铁氧体 JR 系列。

This article discusses a single power factor correction flyback switching power supply, greatly reducing the size and weight of power supply to improve the stability of the power and efficiency.

本文讨论了功率因素校正单片反激式开关电源，大大减少电源的体积和重量，提高了电源的稳定性和效率。

Firstly, the background and the significant of the research is discussed, modern software engineering and its development is also outlined, and the present states and the reason of using the modern software engineering in power systems are also analyzed. Secondly, related theories and methods of the modern software engineering are systematically given in details, which establish the basis of the software development with the software engineering in power systems. Thirdly, the necessity of the developed power system software with the software engineering is analyzed deeply and the key techniques in carrying out the software development with the software engineering are discussed. Based on these, a concrete approach about the software development with the software engineering is proposed. And then, the software design process of 'GPS synchronous monitoring system of Hunan power grid'is given to demonstrate the utilization of the approach proposed. Subsequently, quality and efficiency of the software is analyzed, which indicates the validity of the method used. At last, the main work and fruitage of the thesis is concluded, and the further research is also pointed out.

论文首先论述了课题研究的背景和意义，概述了现代软件工程及其发展，分析了现代软件工程在电力系统中的应用现状及其原因；然后系统地阐述了现代软件工程的相关理论和方法，奠定了电力系统软件工程化开发的理论基础；接着分析了电力系统软件工程化开发的必要性，探讨了实施工程化开发涉及到的关键技术，结合现代软件工程的理论和方法，提出了一种电力系统软件工程化开发的具体方法；之后以湖南电力系统状态GPS 同步监测系统软件的开发为例，详细地阐述了该工程化方法在电力系统软件开发中的具体实践过程，并分析了软件开发的结果，指出了该方法是解决软件开发质量和效率问题的有效途径；论文最后对主要工作和成果进行了总结，并指出了有待进一步开展的工作。

Dynamic experiments of domestic sewage treated by electrocoagulation process with triangle-wave power, sine wave power and full-wave rectifier power, which had the different power waveform and waveform frequency, were studied. And the removal characteristics of organic pollutants were studied.

采用三角形波电源、正弦波电源、全波整流电源进行动态实验，研究采用不同电源波形和波形频率电源的电凝聚对处理生活污水的影响，以及对有机污染物的去除特性。

This product include many kinds of measurement,monitoring,warining,diaplay,communication function,it can measure four quadrant reactive whole fundamental wave and time-sharing fundamental waveelectric quantity;can measure forward and reverse of the active and reactive'smaximal demand and time-sharing demand;can measure each kind of power submultiple,active power,reactive power,apparent power,and so on;can measure and record each kind of pressure loss,current loss and

本产品集各种计量、监控、报警、显示、通讯功能于一身，能计量四象限无功总基波电量及分时基波电量；能计量正反向有功和无功总最大需量及分时最大需量；能测量各相功率因数、有功功率、无功功率、视在功率等；能检测并记录各相失压、失流及三相全失压等事件；能实现远程和红外抄表、编程、监测和校准；也是电力负荷管理系统的配套终端产品。

The silicon solar modules produced by our company may fall into two kinds, that is, large power modules (ranging from 10wp-165wp) and small power modules (ranging form 0.1wp-10wp). The former mainly uses reinforced glass and aluminum alloy rim. It ischaracterized by large power, high conversion efficiency and long service life. It is widely used in the off-grid solar system,on-gridsolar system, household generating and lighting system, traffic lights and solar lighting lamps; the latter chooses quality importedmonocrystalline or polycrystalline silicon solar chips, using solar resin gum for sealing and PET lamination or glass lamination sealing.It is characterized by portability, flexibility, beautiful appearance, and excellent performance. It is mainly applied to solar lawn lamps,portable power solar handicrafts, electric toys and other small electronic and electrical appliances.

我公司生产的硅太阳能电池组件可分为：大功率组件（从10wp-215wp）：主要采用钢化玻璃、铝合金边框封装，具有功率大、转换效率高、寿命长等特点，广泛应用于：独立光伏电站、通讯电源系统、户用发电照明系统、交通信号和太阳能照明灯具等；小功率组件（从0.1wp-10wp）：选用优质进口单晶或多晶硅太阳能电池芯片，采用太阳能树脂胶封装、PET层压或玻璃层压封装，具有使用轻便灵活、外形美观、电性能优良等特点，主要适用于太阳能草坪灯、便携式电源、太阳能充电器、太阳能工艺品、电动玩具和其他小型电子电器产品。

In order to guarantee the safety of power system and acquire its running status, all kinds of real time parameters in power system need to be measured. The power quality analyzer is designed for this specific use. The instrument can measure three - phase power parameters and peak value, analyzer harmonic and communicate with PC. It is characterized with the high-precision, convenient carrying and friendly interface.

为保证电网安全运行并全面了解电网的运行状况，需要对电网的各种运行参数进行实时测量，电能质量分析仪即是为此设计的专用仪器，它集三相电参数测量、峰值测量、谐波分析、上位机通信为一体，具有精度高、携带方便、界面友好的特点。

There are four types of electrical facilities in system: the elementary power, the importability power, the continuous power and the conversion power.

组成电源系统的电源设备分为4类：基础电源，引入电源，不间断电源和变换器电源。

The split between the two groups can hardly be papered over.

这两个团体间的分歧难以掩饰。

This approach not only encourages a greater number of responses, but minimizes the likelihood of stale groupthink.

这种做法不仅鼓励了更多的反应，而且减少跟风的可能性。