变频调速装置在电力系统中的应用调查

为在电力系统中推广应用交流变频调速技术，笔者调查了变频调速装置在电力系统中的应用。本文汇总了调查结果，包括应用变频调速装置的目的、变频调速装置在电厂中的应用范围、电气接线、设备布置、采用变频调速装置后对工艺系统和控制系统的影响、变频调速装置投资及产生的效益等。调查结果显示，变频调速装置已在电厂的各个系统中得到广泛应用，提高了控制水平，节能效果显著。     

异步机变频调速系统的同步並网与脱网研究

本文研究了交流变频调速系统同步并网与脱网的条件,并成功地实现了电流型变频调速系统与电网之间的可逆无冲击切换,从而扩大了交流变频调速系统的应用范围,使其不但可用于交流电动机的变速运行,而且可用于大型异步机的变频起动和动力制动,即使其成为一种交流电机的起制动装置。交直交变频系统由于采用了同步切换装置而使交(定电压,定频率)→直→交(变压,变频)系统具有了可逆性。文中给出了该装置的设计思想、工作原理及实验结果。     

基于DSP的异步电机VVVF调速系统仿真与实现研究

给出了VVVF交流变频调速基本原理和SVPWM控制算法,详细介绍了用TMS320LF2407A实现的三相异步电机变频调速系统,最后对所提出的SVPWM算法及所设计的调速系统进行了仿真和实验验证。结果表明,该交流调速系统结构简单、性能可靠,可广泛应用于电气传动装置中。     

交流变频调速装置在火电厂热工系统中的应用

论述应用交流变频调速装置对火电厂热工系统原设计调速方案进行改造的必要性并介绍具体的改造方法。     

恒压频比型交流变频装置的研制

根据恒压频比交流调速原理,利用一种专为数字电机控制而生产的TMS320F240数字信号处理器,设计了交流变频调速装置。介绍了其硬件组成和软件编程。     

变速调速器在排风机控制系统中的应用

章叙述本厂的一次技术改造。由绕线型三相交流异步电机转子串电阻调速方式改为变频调速，介绍变频调速装置技术原理及实际生产中调试过程。     

交流电机变频调速技术的发展前景

本文着重介绍了国内外交流变频调速技术的发展和工业应用的广阔前景，定性地分析了变频调速电机的设计特点。     

国外及台湾地区交流变频调速装置发展状况

本文概述了美国、日本、韩国、俄罗斯等国家以及欧洲、台湾地区交流变频调速装置的产量、市场、容量、功能和交流变频调速技术的发展方向。     

交流变频调速电机设计

从交流变频调速电机原理入手,具体分析了交流变频调速电机的设计特点。     

引黄工程平鲁泵站接入系统及干线扩机后谐波分析计算

阐述了随着变频调速技术的日益成熟,变频器驱动交流电动机的变频调速系统已成为交流调速的主流,变频调速系统作为供电网的主要谐波源之一,对其进行谐波分析是必要的。针对万家寨引黄工程平鲁泵站及各干线的变频调速机组进行谐波分析计算,结果表明泵机投运后会对电网造成谐波污染,建议控制变频机组同时投运数量,并且在变频装置中装设滤波器。     

调速电气传动系统能效标准的现状及发展趋势

901部分对调速电气传动系统能效标准相关基本概念进行了定义,规范了扩展产品及其部件的功耗计算方法.902部分主要说明了变频器(CDM)、电气传动系统(PDS)和电机系统(MS)的损耗确定方法.同时定义了电机系统(主要是CDM/PDS)的IE(CDM的能效)/IES(PDS的能效)和它们的损耗限值,并提供了相应的测试方法...     

发电厂电气部分培训仿真系统数据库的设计及其特点

介绍了应用于发电厂电气部分培训仿真系统数据库设计及其特点,结合甘肃西固热电厂电气部分培训仿真系统数据库设计实例,对仿真系统数据库的实时性与快速性等特点作了分析,提出并实现了图形数据一体化和数据预处理在数据库中的应用。     

Investigations of the frequency and voltage dependence of load partsystems using a digital self-acting measuring and identification system

Automatic equipment has been developed for the investigation of the static and dynamic behavior of load part systems. Two of these microcomputer-based measuring systems have been installed: one at a 150 MW load part system in Heidelberg, West Germany, and the other at a 80 MW load part system in West Berlin. The measuring equipment and the evaluation procedures are described as well as the load parameters obtained by identifying the strongly disturbed and therefore ensemble-averaged input/output signals recorded inside the load part systems     

水电机组水导支撑系统的横向刚度研究

水电机组水导支撑系统模向刚度的计算分析是机组轴系振动分析的关键技术问题。本文将水导支撑系统分为导支撑组合结构及轴承油膜两部分,系统地阐述了这一问题的理论分析方法,并给出了计算实例。     

Flexible network integrated supervisory control for power systems based on distributed objects

This paper introduces the flexibility of SCOPE (System Configuration Of PowEr control system) which is a new architecture to realize flexible and reliable supervisory control for power systems. Energy Management Systems/Supervisory Control and Data Acquisition (EMS/SCADA) systems are usually geographically distributed and have hierarchical operational organizations. They are continuously changing in accordance with various requirements and varying environments. Therefore, they should be flexible enough to adapt to those changes quickly. SCOPE classifies programs in conventional electric power systems into three hierarchical layers: application‐dependent part, power system‐dependent part, and computer system‐dependent part. The power system‐dependent part realizes flexibility for changing of power system equipment and operational organization, by introducing an enhanced abstract function of object‐oriented technology. Therefore, SCOPE architecture enables EMS/SCADA systems to be flexible, and also enables development efficiently and economically. Through developing and evaluating a SCOPE prototype system, it has been confirmed that the flexibility of EMS/SCADA systems had been improved. © 2001 Scripta Technica, Electr Eng Jpn, 136(4): 34–46, 2001     

数字式工频交流电参数多用表

本文介绍了数字式工频交流电参数多用表的作用，描述了系统的设计过程，给出了系统的组成框图及各部分的连续图；说明核心部件数字式电位器AD5242的结构、性能特点；简述了交流的原理及实现过程；对系统的软件设计也进行了叙述，给出部分软件模块。     

数字式工频交流电参数多用表

介绍了数字式工频交流电参数多用表的作用,描述了系统的设计过程,给出了系统的组成框图及各部分的连线图;说明了核心部件数字式电位器AD5242的结构、性能特点;简述了交流采样法的原理及实现过程;对系统的软件设计也进行了叙述,给出了部分软件模块.     

Identification of a continuous time nonlinear state space model for the external power system dynamic equivalent by neural networks

Based on the concept of the external power system dynamic equivalent obtained for the study system, in this paper a reduced-order artificial neural network is proposed, to construct a model for the external part. The mastermind behind the proposed method is to identify the external part as a dynamic–algebraic ANN, and this separation between dynamic equations in the state space and algebraic equations is useful to solve the prediction problem. Moreover, using similarity transformations, the state space model can be simplified, such that all the nonlinearities are embedded in the algebraic part. Since usually the study system equations are available in the continuous time domain, the external part is converted to the continuous time domain by a novel method. To obtain this model, the system should be excited first by a sort of random disturbances, and then data measured on the boundary nodes is used to identify the model. Identification process is accomplished by training the proposed network which can be used to predict behavior of the external system with a high degree of accuracy. Such an equivalent has wide applications for dynamic stability studies.     

SPD暂态过电压测试系统设计

讲述了SPD暂态过电压测试的相关要求,并依此设计测试系统的主回路.为了按照测试标准所要求的时序加载电压,采用了PLC等现代控制技术实现测试系统的控制过程,并采用虚拟仪器技术构建测试系统的测量部分.经工程实践证明,该系统运行良好.     

矿井3．3kV电网电压故障特征研究

分析了矿井3．3kV电网电压暂态过电压与稳态电压故障特征的特点,计算了矿用3．3kV电动机的绝缘承受能力,确定了阻容吸收和压敏电阻的额定参数,设计了由暂态过电压保护和稳态电压保护组成的电压故障保护系统。试验结果表明系统运行稳定、可靠,实现了电压故障保护功能。