长兴电厂水处理系统集中监控实施方案

介绍了长兴电厂水处理系统的设计理念 ,采用 PLC和工控机组成的监控系统对水处理系统进行了集中监控并对系统的组成、特点作了阐述和分析。水处理系统包括锅炉补给水系统、原水补给水系统、净水站系统及废水处理系统 ,此外还有取样系统、加药系统等。并对系统控制方式、I/ O配置 ,控制要求及功能作了描述     

泄洪告警及指令广播通信系统在龙滩电厂的应用

阐述了为满足龙滩电厂对泄洪告警和广播寻呼等的需求，采用了无线泄洪告警及有线指令广播通信系统，介绍了该系统的设计方案、报警点和广播点的设置、设备配置及系统功能，针对该系统在调试及运行过程中存在的问题提出了改进措施。     

自然光导入照明系统

阐述了主动式及被动式自然光导入照明系统的基本结构和原理：并从照明系统的设计要点、设计照度标准及系统布置三方面介绍了自然光导入照明系统的设计方法。同时从光导系统的密封、保温及光导系统导光管预留孔的施工三个角度介绍了被动式自然光导入照明系统的施工安装。     

ZJ90/6750DB钻机自动送钻控制系统设计方案

论述了ZJ90/6750DB钻机自动送钻系统的设计思路和研制方法,提出了系统的工作原理、工作过程及控制方法。初步完成了该系统的工艺、硬件及软件的设计方案。特别是针对自动送钻这个时变、时滞和非线性系统及双电机送钻装置,提出了采用模糊控制方法及变频器主从控制方案,有效地解决了系统难以建立准确数学模型和双电机送钻装置的同步性及负荷均匀性等问题,在一定程度上改善了控制效果,对系统的快速性、精确性和稳定性等都有一定程度的提高。     

直接空冷机组乏汽吸收式热泵系统调试技术探讨

分析了热泵工作基本原理及热泵系统调试过程中主要包含的内容及流程,总结了直接空冷系统乏汽利用吸收式热泵工程项目在热网循环水系统、驱动蒸汽系统、乏汽系统、减温水系统、驱动蒸汽疏水泵系统、真空系统等调试过程中遇到的问题和解决办法,有利于乏汽吸收式热泵技术的推广应用。     

汽轮机组状态实时监测及故障诊断系统的研究与实现

论述了火电厂汽轮机组状态监控及故障诊断的重要性和必要性。针对电厂具体需求,利用SQL Server 2000数据库和Hibernate、Spring、JFreeChart等开源技术,设计并实现了基于J2EE架构的"汽轮机组的实时监测及故障诊断系统"。详细介绍了系统功能,给出了系统的物理结构及逻辑结构,论述了系统的数据采集方式及软件实现技术。最后通过客户端数据展示界面,证明了该系统的有效性及其优越的性能。     

180MW混流式水轮机及引水系统仿真模型构建与应用

结合混流式水轮机及引水系统结构和工作特点,构建了更接近于真实系统的水轮机及引水系统仿真模型。将新模型应用于某180 MW水轮机调速系统参数测试工作中,辨识了水轮机及引水系统模型及调速系统参数,并进行了频率扰动下的仿真校核,验证了新模型参数的精确性、可靠性。     

华中–川渝联网稳定计算用发电机励磁和调速系统的数学模型及参数

现场调查了华中、川渝系统典型的200 MW及以上汽轮发电机、100 MW及以上水轮发电机励磁系统模型及参数、调速系统(包括原动机)模型及参数；总结了现场进行发电机励磁系统参数测试的经验；根据现场实测结果和调查结果确定发电机励磁控制系统、调速系统可用于电力系统稳定计算的数学模型及参数；提出了评判、校核基于现场测试得出的数学模型和参数正确性的方法，并将其应用到指导生产的仿真计算之中取得了一定的成果。     

高效电动机及节电器智能测试系统

文章介绍了高效电动机及节电器测试系统,该系统可以对轻载调压节电器及变频调速系统进行节能效果测试;系统采用了IEEE 488总线和PLC控制,大大提高了系统的自动化程度。实践证明该系统具有结构先进、配置合理、设备可靠、精度高、操作简便、测量结果处理快速等特点。     

光储联合并网发电系统的设计与研究

结合实际工程,介绍了小型光储联合并网发电系统的设计方案。该工程以示范性和试验性为主要目的,在设备选型上囊括了目前典型的几种电池组件、跟踪系统及逆变器。整个设计包括系统集成、并网方案、电池组件及支架、监控系统、储能系统等部分。重点介绍了储能系统在光伏并网发电系统中的配置和应用前景,对铁锂电池、全钒液硫电池的特性和在分布式新能源发电领域的应用进行了研究。     

电力系统随机动力学研究展望

随机性广泛存在于自然、工程和社会系统中,电力系统也不例外。20世纪70年代左右,电力系统研究逐渐考虑随机性,但偏重于稳态随机问题,而动态问题研究仍然是确定性的。近年来,新能源发电与电动汽车等的广泛接入,给电力系统动态带来不可忽视的随机性。为此,文中提出电力系统随机动力学的研究框架,聚焦电力系统在随机因素作用下的动态问题,包括电力系统的随机动力学模型、随机动态响应、随机稳定性、随机安全性、随机优化控制,并给出研究建议。     

基于稀疏技术的原对偶内点法电压无功功率优化

文章结合电力系统的稀疏特性,提出了一种基于稀疏技术的原对偶内点法电压无功优化控制数学模型,并给出了提高原对偶内点法计算速度的措施。     

Evaluating the impact of uncertain parameters in power system dynamic simulations

There are typically uncertain parameters in power system models. This paper presents a computational method for evaluating the effect of parameter uncertainty on the dynamic behaviors of power systems. The effect of parameter uncertainty is represented by system trajectory or performance bounds around nominal values. Based on the notion of optimal power flow with transient stability constraints, a set of nonlinear optimization problems is formulated to determine the upper and lower bounds of system trajectories. A successive linear programming approach is suggested to solve these nonlinear optimization problems. The proposed method is evaluated by several test systems. The results show that the proposed method is valid and potentially useful in quantifying the effect of parameter uncertainty in power system dynamic simulations.     

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。     

Robust decentralized control of multiterminal DC/AC power systems

A multiterminal DC system embedded in a conventional AC power system can be used as a control element for damping inter-area oscillation. Three methods for decnetralized control of multiterminal DC/AC power systems are proposed. The robustness problems associated with DC control systems are discussed and the sufficient stability criteria are introduced. A power system example, which employs five DC terminals to damp out inter-area oscillations due to the AC power system dynamics, indicates that the proposed methods are realistic for robust decentralized control system design of DC/AC power systems.     

智能系统在电力系统中应用国际会议述评

智能系统在系统中的应用是一个全新的快速发展的研究领域。在近１５年来得到了很大的发展,为解决电力系统中的一些所困难提供了可能折新途径。最近叶开的ＩＳＡＰ‘９７国际会议化比较全面地反映了这一研究领域所取得的最新进展和研究动向。文中对这次会议发表的全部论文作了述评。     

Heirarchical power system control

The present status and future problems of hierarchical power system control are reviewed. Special emphasis is placed on the hierarchical structure of power system control. Power system control has been developed in close association with the progress of the power system itself. The hierarchical structure of the control system is closely connected, therefore, with that of the power system, and this structural relationship is reviewed. Motivations of using a hierarchical structure of power system control are reviewed in terms of power system control and planning. Required performances of computers installed at respective levels of hierarchical control system are discussed. Benefits resulting from the introduction of such control systems are summarized, and future problems associated with the further development of hierarchical power system control are considered.     

Loop power system control by high-speed phase shifter

Recently, power systems have become larger and more complex. Particularly, the looping of power systems is becoming highly desirable to improve the stability. The main features of such looped power systems are: (i) comparatively fewer losses; and (ii) improved angle stability as well as voltage stability. However, these systems have demerits, such as, in case of route off fault in a loop power system, power disturbances increase more and more, etc. If these demerits are overcome, the loop power systems are going to be more beneficial. In an attempt to obtain a solution to such problems, this paper describes several results of applying a high-speed phase shifter in the control system of a loop power system.     

Transient Stability Analysis for Sohio Prudhoe Bay Emergency Power System

Small isolated automatic power systems of the types similar to the emergency power system at Prudhoe Bay are susceptible to stability problems. These power systems, having two or more generator sets operating in parallel with remarkably different mechanical and control characteristics, require transient stability analysis. The design of the Prudhoe Bay emergency power system is discussed, as are stability problems such as severe transient overload, voltage drop, and frequency drop, which are likely to occur and can cause catastrophic shutdowns during the emergency conditions. The conclusions drawn are that 1) a load sequencing and load blocking control scheme must be provided to control the automatic loads at Prudhoe Bay, and 2) stability analysis should be considered essential in the planning and design phases of similar power systems so that compatible generator units and appropriate load control schemes can be selected.     

Decision making in fuzzy environment and multicriteria power engineering problems

This paper presents results of research into the use of the Bellman-Zadeh approach to decision making in a fuzzy environment for solving multicriteria power engineering problems. The application of the approach conforms to the principle of guaranteed result and provides constructive lines in computationally effective obtaining harmonious solutions on the basis of solving associated maxmin problems. The presented results are universally applicable and are already being used to solve diverse classes of power engineering problems. It is illustrated by considering problems of power and energy shortage allocation, power system operation, optimization of network configuration in distribution systems, and energetically effective voltage control in distribution systems.