电力系统风险研究现状

电力系统风险近些年已成为电力系统的研究新热点,它不但体现了电力系统研究的新思路,而且也完成了在追求电力运行生产安全性和经济性过程中获得新平衡点的目标。结合国内外相关文献,分别对电力系统风险研究现状4大领域（电力系统运行风险、电力系统设备风险、电力市场风险、电力系统安全风险）进行分析,指出更多关于电力系统风险的研究成果将为电力系统提供必要的技术支持。     

分布式发电及其在电力系统中的应用研究综述

随着能源危机和环保意识的增强,分布式发电越来越受到重视。对分布式发电（DG）的概念和分类进行了归纳总结,分析了分布式发电对配电网规划、网损、线路上潮流和系统保护的影响．并对未来分布式发电需要进一步研究的问题作了展望。     

基于分布式供能技术的能源系统

由于2003年美国和加拿大大面积停电事故的发生,人们对电网安全的要求越来越高,分布式供能技术引起了世界能源界的广泛关注。能源工业亟待解决的四大问题：合理调整能源结构,进一步提高能源利用效率,改善能源产业的安全性,解决环境污染。而分布式能源系统恰好在这些方面能给以补充,因此大电网与分布式能源系统的合理结合,被认为是21世纪电力工业的发展方向。详细介绍了基于分布式能源系统的概念、特点及发展状况和前景展望。还通过对几种主要的分布式供能技术的技术特点、国内外发展状况及前景展望的介绍,进一步说明了分布式供能技术的发展状况,阐释了分布式供能技术的优势。     

电动汽车的辅助动力及其显示系统

由于能源紧缺和环境污染严重，电动汽车是未来汽车的发展方向。我们研究的辅助动力电动汽车是通过辅助动力给电池充电，从而延长续驶里程。由于现在技术要求的限制和公共充电设施的缺乏，使辅助动力电动汽车的研究具有实际意义。     

内河干线船舶混合动力系统匹配设计

针对内河船舶动力系统匹配设计粗糙,且河道工况复杂,对动力系统的功率需求多变等情况,提出一种并联式混合动力系统匹配设计方法。根据任务剖面分析、混动模式功率划分、动力系统指标分解、关键设备选型等环节实现系统设计。在航行试验阶段验证各模式的航速性能,全模式螺旋桨转速误差在5%以内,全模式航速误差在3%以内,可以满足实际的工程使用需求。     

Simulation Analysis for Massive Deployment of Variable Renewables Employing an Optimal Power Generation Mix Model

This paper develops a high time-resolution optimal power generation mix model in its time resolution of 10 minutes on 365 days by linear programming technique. The model allows us to analyse the massive deployment of photovoltaic system and wind power generation in power system explicitly considering those short-term output variation. PV （photovoltaic） and wind output are estimated, employing meteorological database. Simulation results reveal that variable fluctuation derived from a high penetration level of those renewables is controlled by quick load following operation of natural gas combined cycle power plant, pumped-storage hydro power, stationary NAS （sodium and sulfur） battery and the output suppression control of PV and wind. It additionally turns out that the operational configuration of those technologies for the renewable variability differs significantly depending on those renewable output variations in each season and solving the seasonal electricity imbalance as well as the daily imbalance is important if variable renewables are massively deployed.     

电力系统的新计算模式--网格计算

介绍了网格计算这种新的计算模式，它可以大幅度提高计算性能而且不需要增加任何额外硬件成本。分析了网格计算的特点，指出应用网格计算的关键在于将电力系统固有特点与网格计算特点相结合，并提出电力系统应用网格的体系结构，最后分析了应用网格计算所涉及的关键问题及技术。     

浅谈电力电子技术在节能环节的应用和谐波控制

介绍了电力电子技术,及其在节能环节中的应用,并就节能环节使用中的问题给出实例分析以及图标演示。同时对电力电子装置中的谐波和电磁干扰现象提出了相关的的控制手段,希望能为行业发展提供帮助。     

Current situation and development of wind power in China

The current development of wind power in China was presented in this paper. Many regions such as Xinjiang Uygur Autonomous Region, Inner Mongolia Autonomous Region and southeast coastal region, etc. in China have abundant wind energy resource. At the same time, the utilization of wind power in China has been developing quickly and its prospect is promising in spite of many some obstacles. With the implementation of the Renewable Energy Law, some previous obstacles have been or are being eliminated. Much investment and many enterprises start to enter this field. In spite of this, there still exist some financial and technological obstacles. One of the technological obstacles is the stability of local power grid owing to the increasing proportion of the wind power capacity. Because the centralized development mode of wind power was adopted, the quick fluctuation of wind speed will influence the voltage and frequency stability of local power grid. In addition, large wind farm has little dispatching ability because of the uncontrollability, randomness and fluctuation of natural incoming wind. To erase these obstacles, a novel hybrid power system combining wind farm and small gas turbine power plants is discussed.     

以大型风电场为核心的多能源互补发电系统

针对在集中进行大规模风电开发时,由于来流风速的随机性、间歇性与不可控性所带来的风电场出力波动和不可调度性,本文论述了在当前的技术条件下,国内外已经运行或提出的几种多能源互补发电系统的特点以及它们适合发展的范围。依据大型风电场出力负荷波动的特点,提出了与大型风电场组成互补系统的其他发电设备所要求具备的基本条件,给出了为解决风电大规模开发所带来的技术瓶颈所要研究的互补发电系统关键技术。     

遗传算法在电力系统无功优化中的应用综述

遗传算法是近10年来发展的基于自然选择规律的一种优化方法,算法能成功的解决无功变量中的离散问题,避免常规数学优化方法的局部最优现象。本文阐述了简单遗传算法以及遗传算法与其它算法相结合的算法在电力系统无功优化中的应用和今后的发展方向。     

新疆光伏发电发展前景展望

太阳能是人类取之不尽用之不竭的可再生能源,具有充分的清洁性、绝对的安全性、相对的广泛性、确实的长寿命和免维护性、资源的充足性及潜在的经济性等优点,在长期的能源战略中具有重要地位。详述了新疆光伏发电发展现状,进行了新疆发展光伏发电的可行性分析和发展前景展望。     

Optimization of a combined wind and solar power plant

The paper is concerned with determining the optimized active areas of a photovoltaic conversion system, of a group of electricity generating wind machines and the optimal capacity of a battery storage system for a combined power plant. Minimization of the total life-cycle cost of the system is the criterion to obtaining the optimized parameters of the system. The algorithm consists of generating the system costs corresponding to various values of the parameters and to use these costs in a search procedure to determine the minimum. Each point is generated by a simulation program describing the system behaviour.     

Stochastic approach in the optimization of A nuclear power system

The paper deals with a CANDU-CANDU (Th/Pu)-LMFBR (PuO₂) nuclear power system which evolves in a finite time interval. Its initial evolution is only in the CANDU variant, and subsequently in the variants CANDU (Th/Pu) and LMFBR (PuO₂) by the use of Pu produced in the system. It is assumed that the fuel burn-up in the LMFBR (PuO₂) reactors is a random value, as it is governed by an a priori determined field of probability. The resources of natural uranium and Pu which severely influence the development of the system are also random, as they cannot be definitely known, and moreover they are actually governed by another field of probability already known. Under these conditions, the set of optimal solutions and associated optimal values represented by the nuclear electric powers released in the system at the end of the considered time interval have to be derived. Concomitantly, the distribution of the optimal value, its average value and standard deviation can be evaluated. This type of stochastic approach to nuclear power system optimization is much more valid than the deterministic approach, as it supplies information of interest for the decision-makers engaged in the solution of a nuclear power policy.     

影响煤矿供电系统功率因数的原因与补偿措施

文章浅析一般企业供电系统影响功率因数降低的原因、补偿类型和方法,以及人工补偿的电容器容量确定.     

风光互补发电系统功率输出的自适应控制

针对风光互补发电系统在运行过程中出现的供电功率空缺以及直流母线电压不稳定问题,依据光伏为主力发电源,风为辅助发电源的发电方式,提出了以风力发电的输出功率补偿光伏发电的输出功率的自适应控制方案。鉴于发电系统中固有的非线性特征和运行中的参数变化,对风力发电系统采用自适应控制实现对互补发电系统中所需功率的差额实时补偿,保证直流母线电压的平稳。为实现蓄电池充电稳定性,结合蓄电池非线性充电模型设计了充电电流跟踪控制器,确保对期望充电电流的跟踪。理论分析和仿真结果均表明,在互补发电系统运行中采取的控制策略的可行性。     

最大功率点跟踪原理及实现方法的研究

对最大功率跟踪控制中DC-DC变换器的原理和控制方法进行了实验研究,利用DC-DC转换电路测量和单片机控制系统实现最大功率点跟踪,使太阳电池始终保持最大功率输出;同时提出了实现最大功率跟踪的控制方法,并通过实测结果说明最大功率跟踪系统的效果。     

电力系统继电保护专家系统的构建

针对电力系统继电保护故障诊断中存在的信息不完备和不确定性等问题,构建了电力系统继电保护专家系统。着重论述了该系统的构建,对结构、推理规则和数据采集等进行了分析,结果表明能很好地解决电力系统继电保护中的一些故障问题,提高了故障诊断的准确度,从而确保电力系统的可靠运行。     

机器智能在电力运检全过程中的应用研究

运维检修业务是保障电网安全运行的核心环节.面对电网规模不断扩大、运检任务难度不断加大,传统的运检模式难以适应时代发展及电网发展要求.机器智能在信息识别、模拟仿生、深度学习等方面的发展和突破,给传统电力运检带来了新的分析理念和技术途径.在当前智能运检体系建设的背景下,从机器智能的概念出发,介绍了现阶段机器智能技术的研究和...     

西北电力系统如何应对大规模风电开发与利用

分析了我国风电大规模开发面临的主要问题,并指出要解决风电并网的调峰和电力系统稳定等难题,必须依靠和建设统一坚强智能电网,坚定不移的实施“一特四大”战略,在坚持电网电源统一规划的基础上,实施风电与火电配套建设和打捆外送,实现区域问能源资源优化配置,建立风能全国消纳平台,促进新能源、常规电源与电网科学有序协调发展。