新型ACEG变速恒频发电励磁模糊控制策略

交流励磁发电机(ACEG)能实现有功功率、无功功率和转速的解耦控制,实现变速恒频发电.交流励磁系统具有多变量、非线性、强耦合和参数不确定性的特点.传统的PID控制难以解决系统非线性问题,矢量控制方法能实现控制变量解耦却依赖具体数学模型.提出一种基于模糊神经网络的解耦控制方法.实验证明该方法能够实现交流励磁发电机变速恒频发电,且方法简单、灵活、方便、有效、鲁棒性强.     

基于FPGA的64 kbit/s通信误码生成仪

介绍了利用FPGA实现64 kbit/s通信误码生成仪的具体实现方法,即为减轻CPU的工作负担,利用FPGA和SDRAM芯片IS61LV5128实现64 kbit/s信号的时延、在64 kbit/s信号中添加随机误码、连续误码的实现方法,利用FPGA实现从信号中提取时钟的锁相环电路的设计方法。利用ARM7的数据处理能力和FPGA并行处理能力相结合,适用于实时性要求高的场合,是一种实时信号处理新的实现方法的探索。     

AT89C2051单片机在发电机转速监控装置中的应用

介绍了利用AT89C2051单片机组成水轮发电机转速监控装置的实现方法。重点介绍了发电机的残压测频、单片机串行显示和频率计数实现方法。利用该方法实现的转速监控装置 ,成本低、可靠性高     

一种新的光伏发电系统中最大功率跟踪方法的实现与应用

分析了目前采用的最大功率跟踪的方法及缺陷,提出了一种新的最大功率跟踪方法。推导了此跟踪方法的工作原理,并给出了跟踪方法的实现算法、控制策略、实现的流程图以及实现的具体步骤。介绍了该最大功率跟踪方法在并网光伏逆变中的具体应用。通过新方法仿真结果与牛顿插值法仿真结果的对比,以及光伏并网逆变器的输出波形,证实所采用控制策略和实现方法是完全正确的。     

配电管理地理信息系统(GIS)和配网DA系统的一体化

文中就配电管理地理信息系统 (GIS)和配网 DA系统实现一体化的一些基本概念、设计原则和实现方法作了一定的论述,并着重对用连接式实现一体化提出自己的一些解决方法.     

蓄电池远程容量测试系统的设计和应用

阐述了蓄电池远程容量测试系统的设计实现方法、组成结构及功能特点,并对其总体构架、实现原理,以及蓄电池远程容量测试系统在单组电池环境下容量测试时防止负载失电的实现方法进行了描述。     

实时专家控制在自动浇铸系统中的应用

分析了一个浇铸实时控制专家系统RESC的设计与实现 ,在开发系统中采用专家系统技术、实时控制技术。从工艺生产实用要求出发 ,提出适合于连续过程实时控制系统的专家控制方法 ,从而实现了自动浇铸。着重讨论了系统结构、实时控制技术、专家控制方法及系统的实现     

运用系统工程方法实施企业目标管理的实践与分析

电网建设是县供电企业实现科学化、规范化、精益化管理,实现创一流供电企业的目标必不可少的硬件基础,系统的管理思想、管理制度、管理措施和管理方法就是保证目标实现的软件基础,二者相辅相成、缺一不可。本文着重就运用系统工程方法实施企业目标管理加以探讨。     

高速动车组大功率多重化四象限整流器控制方法

以虚拟d-q电流解耦控制方法为基础,介绍了单牵引变流器内两重化四象限脉冲整流器控制方法、同一控制器中载波移相的实现方法、不同控制器之间多重化四象限脉冲整流器载波移相的实现方式、四象限脉冲整流器开关频率较低时（小于500 Hz）的调制补偿方法。在实际大功率变流器上验证了该控制方法。证明该方法可以实现网侧电流谐波低、网侧单位功率因数高及直流侧电压恒定的控制目标。     

先进控制策略在分散控制系统中的实现

介绍了在分散控制系统中实现先进控制策略的基本方法、选择依据、实现过程和应注意的问题。     

温度、电压、谐波、涌流等对电容器寿命的影响

对温度、电压、谐波、涌流等影响电力电容器实际使用寿命的因素作了分析，提出了相应的解决办法。     

温度、电压、谐波、涌流等对电容器寿命的影响

对温度、电压、谐波、涌流等影响电力电容器实际使用寿命的因素作了分析,提出了相应的解决办法。     

Computer Wiring System-Raceways, Circuits, and Wire Terminations

This paper introduces a computerized wiring system that is new to the industry. It begins with the reasons for the development of the computer program to process the wiring system data in favor of conventional drafted schedules and diagrams. A brief explanation of the computer program is given, and the common terms associated with wiring methods are redefined for use by the computer. The program operates by itemizing the input data of raceways, circuits, and wire terminations; processing these data to create maintenance files and print various schedules. Sample schedules included in the paper show how some of the schedules are intended for use by the designers, some for contract documentation, and others for construction or maintenance. Methods for updating, revising, and maintaining the computer file are also included, and a general guide for planning and controlling a project via computer wiring system methods is offered. Finally the merits of the computerized system are discussed with possible future improvements projected.     

Unbalance protection of fuseless, split-wye, grounded, shunt capacitor banks

In recent years, a large number of electric utilities have been implementing fuseless split-wye grounded capacitor banks in lieu of the traditional externally fused bank. This change in philosophy has forced many protection engineers to research new methods of calculating the quantities needed to apply unbalance protection. This paper presents a novel method of calculating the unbalance current produced by fuseless capacitor unit failures as well as some general background information regarding fuseless split-wye grounded capacitor bank technology and unbalanced protection.     

Locked-rotor and acceleration testing of large inductionmachines-methods, problems, and interpretation of the results

The measurement of locked-rotor current, torque, and power factor has been a standard test for induction machines for many years. Measurement of torque has evolved from using a brake, a dynamometer, a torque arm, and scale, through strain gauges and load cells to acceleration tests. The test must be of short duration to prevent damage to the machine and large machines present problems because of facility limitations in either kilovoltampere or torque measurement. A single test at reduced voltage when prorated to operating voltage by the square of the ratio of rated voltage to test voltage neglects the impact of saturation and results in significantly lower values of predicted torque and current. This paper discusses several methods for performing the locked-rotor and the speed-torque tests on large machines. It also discusses some of the problems associated with the test methods and shows how the tests can be performed and the results evaluated to account for saturation effects. Finally, the paper shows how to extract some machine circuit parameters from the test data     

电力企业人才管理选用育留的思考

从分析现状问题出发,从核心层面探讨了人才管理中“选才、用才、育才、留才”四个关键环节的作用,并提出一些工作思路和方法,以保持企业在市场中的竞争优势。     

The possibilities of fracture mechanics as applied to problems of strength, service life, and substantiation of safe operation of heat-generating and mechanical equipment

The fundamentals of fracture mechanics are briefly outlined, and its possibilities as a tool for estimating the longevity and bearing capacity of equipment components the metal of which contains cracklike flaws are pointed out. Experimentally obtained kinetic crack resistance diagrams lying at the heart of methods for determining the survivability of structures are given for some steels. Practical application of the methods of fracture mechanics is demonstrated on a particular example of substantiating temporary operability of a boiler drum having cracklike flaws near the holes for water downtake pipes.     

直流110V、220V蓄电池瓶爆炸的原因分析

针对发电厂一次蓄电池爆炸的原因进行了分析研究,提出了防范此类事件的措施和对策。     

新能源与电能变换：系统集成、技术融合及应用展望

本文讨论了对于新能源供电系统与电能变换装置应用具有重要作用的问题，着重探讨电力电子变换、系统集成和技术融合。论文首先论述了风力发电、太阳能电池和燃料电池等几种新能源的供电方式，并提出电源变换在新能源电力系统中的核心作用是值得注意的共性问题和关键技术。为此，电能变换装置特别是直流变换器和交流逆变器被广泛地用于新能源电力系统，以组成集成供电系统。论文进一步提出了技术融合的思想，将现代电源技术、功率变换技术、控制方法、安全保护及智能管理等结合成一种综合方法来解决目前面临的问题，并展望了新能源电力系统的在混合供电、分布式电力系统和便携式电源等方面的应用前景。     

配电网故障检测、隔离与恢复设计方案

简要分析当前几种配电网故障恢复模式,提出配电网故障检测、隔离与恢复的几种方法。给出针对配电网故障检测、隔离与恢复方案的软件设计思想,和利用VC＋＋6．0进行编程的流程框图。