加热炉助燃风机的变频调速与节能

本文介绍了变频调速器在风机中的具体应用,给出了变频调速在锅炉及加热炉燃烧控制过程中的应用实例,阐明了变频调速的原理。     

抽油机节能方法与变频技术合理应用研究

为了充分发挥变频技术在抽油机节能方面的潜能,大范围地推广变频技术在油田上的应用。本文从多角度阐述了变频技术在抽油机节能方面的巨大优势以及一些常用油田节能方法的局限性,结合交流调速理论总结出变频技术应用存在的一些缺陷。最后,提出一种合理可靠易实行的抽油机变频节能技术。通过理论分析、现场试验表明上述技术可以有效地解决变频技术应用中出现的不足。     

浅谈离心泵变频调速节能

本文叙述了离心泵调节方法;从理论上详细分析了离心泵变频调速节能的原理;通过调节方法的比较和变频调速的实际应用说明了变频调速的优点,得出了变频调节可以大幅度节能的结论.     

高压变频技术在城市排污泵站中的应用

根据城市排污现状,提出了城市排污对高压变频设备的要求;以上海市排水管理处吴闵一号泵站的变频设备为例,在分析变频设备的工作原理基础上,阐述了变频技术在排污泵站应用的控制原理以及变频技术对排污系统的影响,最后分析了采用变频技术后的节能效果。     

变频调速在污水提升泵上的节能应用

概述变频调速控制原理 ,介绍了污水处理厂在污水提升泵上应用变频调速 ,分析了采用变频调速可达到的显著的节能效果。     

浅谈变频调速器的基本原理及其应用

变频调速传动是现代电力传动的发展方向。介绍了交流变频调速器 (简称变频调速器 )的基本原理、特点、适用范转及应用实例 ,以推动变频调速技术在我国进一步推广应用。     

变频器在中央空调循环水泵节能控制中的应用

介绍了变频变水量节能分析,变频节能在中央空调循环水泵中应用因素,变频调节与阀阻调节的比较,并阐述了ＴＣ－Ⅱ变频节能控制系统的特点。列举了方案。     

变频技术在煤矿机电设备中的应用

简单介绍了变频技术的定义、原理等相关内容,然后重点分析了它在风机、提升机、空压机等煤矿机电设备中的应用,以便扩大变频技术在煤矿机电设备中的应用范围.变频技术的应用使机电设备进一步改造,不仅提高了设备的寿命而且节约了大量电能,对煤矿企业来说有着重要的意义.     

变频调速技术在锅炉风机上的应用

简述实际生产中锅炉风机运行情况及发现的主要问题,锅炉风机采用变频调速的原因,介绍了锅炉风机变频调速节能原理.通过变频改造后的实际应用效果及节能分析论证了采用变频调速达到了节能的目的和效果.     

广西推广应用变频调速技术势在必行

本文重点介绍分析了变频调速的发展、成长、完善、成熟的过程及与其它调速方案的比较,并介绍了我国变频调速技术的应用情况,结合广西应用变频调速技术的历史与现状,进一步阐述了在广西几千个企业中,特别是在糖厂中推广应用变频调速技术的必要性和可以取得的经济效益与社会效益。     

光伏电站快速频率响应技术研究及应用

随着大容量高比例的新能源集中接入电网,电源结构发生较大变化,电网可用的快速频率响应资源逐步减少,同时大规模新能源基地通过特高压直流外送规模不断扩大,若出现大功率直流闭锁将对电网频率安全造成严重威胁,电网的调频压力及安全运行风险不断增大,亟需新能源参与电网快速频率响应,提升大电网频率风险防控水平。介绍了新能源电站快速频率响应性能要求,面向已有或新建的光伏电站,提出了快速频率响应典型方案,开发了新能源电站一体化控制系统,并在光伏电站开展了示范应用,实现了电站AGC/AVC和快速频率响应功能的集成,达到了光伏电站对电网频率和电压主动支撑的目的。     

Frequency deviation control by coordination control of FC and double-layer capacitor in an autonomous hybrid renewable energy power generation system

In this paper, a novel control strategy for frequency control in stand-alone application based on coordination control of fuel cells (FCs) and double-layer capacitor (DLC) bank in an autonomous hybrid renewable energy power generation system is implemented. The proposed renewable energy power generation subsystems include wind turbine generator (WTG), photovoltaic system (PV), FC system and DLC bank as energy storage system. The system performance under different condition has been verified by using real weather data. Simulation results demonstrate the validity of proposed studied hybrid power generation system feeding isolated loads in power frequency balance condition.     

中小型风力发电提水智能控制系统的设计

叙述了1种风光互补抽水智能控制系统设计方案,指出通过智能芯片对太阳能光电板和风力发电机发出来的能量进行合理的管理和分配,可有效地最大化地利用风能和太阳能,提出了1种新型抽水控制方法,试验表明,该方案取得了很好的效果。     

Dynamic participation of doubly fed induction generator in automatic generation control

Increasing levels of wind generation have resulted in an urgent need for the assessment of their impact on frequency control of power systems. The displacement of conventional generation with wind generation will result in erosion of system frequency. The paper analyzed the dynamic participation of doubly fed induction generator (DFIG) to system frequency responses of two-area interconnected power system having variety of conventional generating units. Frequency control support function responding proportionally to frequency deviation is proposed to take out the kinetic energy of turbine blades in order to improve the frequency response of the system. Impacts of different wind penetrations in the system and varying active power support from wind farm on frequency control have been investigated. Integral gains of AGC loop are optimized through craziness-based particle swarm optimization (CRPSO) in order to have optimal transient responses of area frequencies, tie-line power deviation and DFIG parameters.     

LCL filter design and robust converter side current feedback control for grid-connected Proton Exchange Membrane Fuel Cell system

Proton Exchange Membrane Fuel Cell (PEMFC) systems are environment-friendly systems that can be used as distributed power generation (DPG) system. As DPG units are usually utilized in weak power distribution systems, the grid inductance variations should be investigated during the control design stage of the grid-tied fuel cell systems. In recent years, LCL filter is broadly utilized to grid connection of DPG units, and the proper design of this filter is an important issue. In this paper, converter side current feedback (CSCF) method has been applied due to its innate damping feature to integrate PEMFC fuel cell system through LCL filter into weak power distribution system. The impact of delay should be considered as it limits the stability region of the resonance frequency of the CSCF control method especially, in the presence of wide variations of the grid inductance. Precise-tuned LCL filter design and consequently, the proper choice of the resonance frequency can remarkably affect the performance of the CSCF control. An adequate-tuned design procedure for LCL filter parameters has been proposed in this paper. Step-by-step tuning of the PR controller parameters has also been included to enhance the power quality. The grid-tied fuel cell system with modified-Y-Source inverter and LCL filter as an interface between inverter and grid has been simulated to analyze the quality of the injected power. Simulation results in MATLAB/Simulink environment verify the suitable performance of the proposed power conditioning system as well as its stable operation versus wide variation of weak grid inductance.     

风电高渗透率下中长期时间尺度系统频率波动仿真研究

随着风电渗透率地不断提高,风电并网对电力系统频率稳定的影响越来越大。鉴于已有的电力系统仿真软件对仿真互联电网短期和中长期频率控制不能很好地满足要求,且各种类型发电机组的数学模型也是根据需要建立,因此提出了建立基于准稳态法利用MATLAB编程实现的中长期时间尺度频率波动仿真系统。该系统能够提供风电场、水电机组和火电机组参与系统频率控制数学模型,区域电网联合频率控制数学模型,并且能够进行系统备用调整容量分析和AGC性能监视。     

变频技术在电厂循环水泵中的应用

针对目前主要采用阀门调节管路流量而造成能源浪费的问题,介绍了变频调速技术的主要原理、汽轮机最佳真空的计算方法,指出在电厂循环水系统中应用变频调速技术具有较大的节能潜力。     

Stability investigation of a longitudinal power system and itsstabilization by a coordinated application of power system stabilizers

This paper presents the results of a stability investigation of a power system with longitudinal structure and its stabilization by coordinated power system stabilizers (PSSs). The effects of the existing controllers on system stability are studied. If no PSSs are present, the damping of various swing modes in the system will be very poor and low frequency oscillations present. Eigenvalue analysis shows that the undamped modes are sensitive to excitation control while speed governors have little influence on damping. In order to enhance the overall system stability through excitation control, a coordinated design procedure for power system stabilizers has been developed based on generation coherency, total coupling factor and nonlinear simulation. A PSS designed using this procedure is robust to different operating conditions and very effective for damping oscillations. Comprehensive simulation studies were conducted and results are presented     

变偏置双交叉限幅燃烧控制系统设计及应用研究

在双交叉限幅燃烧控制系统的基础上,针对船用蒸汽动力装置主锅炉负荷变化频繁及幅度大的运行特点,设计了一种变偏置双交叉限幅燃烧控制系统,并对所设计的变偏置双交叉限幅燃烧控制系统在船用主锅炉燃烧控制系统中的应用进行了仿真实验研究,给出了变偏置函数的最佳取值范围。     

The energy storage system output control strategy to improve theshort term windpower forecastingaccuracy rate

目前对于储能系统应用于平抑新能源发电的波动性、移峰填谷等场景的控制策略已有文献研究,但对于风功率预测准确率影响风电场效益的机制下储能系统应用的可行性尚未见研究。本文提出了一种以减小风电场短期功率预测偏差为目标的储能系统出力控制策略,控制策略以风电场实时出力数据（秒级）为数据源,采用线性外推加以移动平均优化的方法预测下一时刻风电场出力,通过比较风电场短期功率预测值与实时预测值,计算储能系统期望出力,并根据储能系统不同SOC区间内的出力能力进行约束,输出储能系统出力指令,最后进行了仿真验证。结果表明,本文提出的储能系统出力控制策略,能够使风电场通过配置储能系统,减少短期功率预测准确度考核,对风电场的精益化运行具有指导意义。