本文利用移动互联网、云计算和大数据技术,提出一种多系统融合的移动电力巡检系统.该系统通过云服务平台整合多个电力巡检关联系统,实现关联系统之间的实时数据交互,并依据变异系数对多系统融合的稳定性进行控制,以便实现系统资源的分配和调度,从而提供决策分析和预警.基于本框架的系统实现和实际应用测试结果表明,该系统能有效提高电力企业巡检的准确性和效率.

通过关注新一代智能站二次系统技术,构建全站集成联调仿真环境。该环境包括仿真测试激励源、配套的检测工具、以及相应的后台系统。总结二次设备集成测试技术和二次设备集成测试流程,对仿真测试配套技术、配置数据参数的智能化处理、仿真测试系统开发等新智能站就地层集成测试技术进行分析,将结果应用于变电站现场以实现快速、高效检测,提高联调效率和现场分析解决问题的能力。结合智能变电站工程中的故障仿真形式,通过母线保护装置性能和电子式互感器校验证明该测试方案科学有效。

电力系统谐波检测为谐波治理提供了方向,同时也是谐波监测系统的核心.本文首先阐述了电力系统谐波的诸多危害;其次对一些传统检测方法和近期新方法展开讨论和分析,比如瞬时无功功率法、快速傅里叶变换法、小波变换法、希尔伯特-黄变换法等;最后阐述了将来谐波检测领域的发展趋势.

In order to realize the comprehensive monitoring of DC side harmonics of Xiamen MMC-HVDC transmission project, this paper proposes a convenient and feasible harmonic monitoring scheme based on actual engineering conditions. According to this scheme, a DC side harmonic monitoring system is constructed. The system can not only perform harmonic analysis and over-limit alarm on the DC side harmonics of the whole station, but also has the function of fault recording, the degree of integration is high. Through this system, the distribution of the harmonics of the DC side of the whole station can be clearly understood. It provides guarantee for the safe and stable operation of the MMC-HVDC transmission project. The FFT and artificial neural network algorithm are used to analyze the harmonic signals within 50 times. The calculation is small and the real-time performance is high, which can meet the needs of actual engineering.

为了适应日益苛刻及复杂场景下的保供电需求,研发了多模式在线保供电移动储能装置,能够根据实际情况提供串联、并联及双回路3种保供电模式.针对3种保供电方案介绍了接入方式,提出了储能系统的供电方法及控制程序.深入分析了储能装置的控制策略及无缝切换技术,提出了重复控制与PID控制相结合的储能变流器复合控制方法,该方法能够有效提升非线性负荷接入时供电系统的电能质量.分别搭建实验平台,针对阻性、阻感和阻容3种性质的负荷进行了多模式保供电实验,实验证明该装置串联模式保供电性能最好、并联模式实现了无缝切换、双回路模式实现了多回路供电.总体上3种模式各有优缺点,该装置可以根据不同场景提供多模式的保供电方案,能够较好地实现在线保供电等目标.

With the increasingly opening in electricity market, the maturing of distributed generation (DG) technology and the proposing and completing of related policies and regulations, regional energy supplier is stimulated to build distributed generation. This paper proposes a bi-level programming model of active distribution network considering the benefit of regional energy supplier. The maximization of comprehensive benefit of regional energy supplier is taken as the objective of upper level, and the lower level is optimized for each scene, which considered the uncertainties of distributed generation output and load, as well as four active management measures including regulating reactive power compensation capacity, curtailing the output power of DG, regulating the on-load tap changer and demand-side management. A hybrid strategy combining harmony search strategy and particle swarm optimization is proposed to solve the model. The model and algorithm is tested with IEEE-33 node system. The simulation results show that the model and algorithm in this paper can increase the capacity of DG and comprehensive benefit of regional energy supplier.

In order to adapt to active distribution network which will have large-scale distributed generation (DG) and high level of automation in the future,active management measures must be considered in the planning stage to optimize system operation.And the existing research of distribution network reactive compensation planning ignores the uncertainty of DG and load.Aiming to solve the problems,this paper proposes reactive compensation optimal allocation model in active distribution network based on the uncertainties of intermittent DG and load power.The lowest reactive compensation capacitors investment cost and network loss cost are taken as the objective of upper level.And considering two active management measures including regulating reactive power compensation capacity and regulating the on-load tap changer,the lower level optimizes for each scene.This paper uses K-means clustering method to reduce the scene,and combines with the harmonic search algorithm and particle swarm algorithm to solve the model.And simulative results of IEEE-33 distribution system verify the effectiveness of the model and solution methods.

The revolution in social production technology in Internet era has brought increasingly important influence. This paper analyzes the automatic discovery and topology rendering of network device, which are important target technology in the current and future network device development and application and attract extensive attention from various fields because of the superiority. Therefore, research on the relevant content has some positive significance.

The evolution of optical fiber communication technology is driven by the ceaseless growth of capacity demand of Internet.Space division multiplexing (SDM) based on multi-core fiber,few-mode fiber,few-mode multi-core fibers and orbital angular momentum has become the focus of academy and industry.Key technologies and latest research progress were reviewed,including novel fiber design,spatial mode conversion,spatial channel de/multiplexing and optical amplification.Based on the comparison and analysis of four kinds of SDM technologies,their bottlenecks and potential future application were also discussed.

电力信息物理融合系统（CPS）是电力系统的一个全新领域,并对国民经济和社会发展影响重大。本文首先介绍了电力CPS的概念、特征和结构模型,接着从基础理论和应用研究两方面综述了电力CPS的研究现状,包括建模理论、系统框架、仿真技术、安全性与可靠性及能源互联网等方面,最后,总结了电力CPS的几点发展趋势,并提出了发展建议。

In the network environment, the significance of log monitoring lies in collecting resources and maintaining network security. This paper enumerates the log types in the network environment. Based on the illustration of flume structure, the design and implementation of log monitoring technology based on flume are further studied, hoping to provide a guarantee for the improvement of the network log monitoring level.

研究基于CIM_SVG的电网数据模型基础上的配电线路单线图自动布局算法,给出了一种辐射状单线图自动绘图的完整方案。提出一种馈线分级分支的干线-支路模型,结合CIM_SVG数据模型垂直、水平逐级交叉布置馈线各支线;应用面向对象思想建立一种支线图元区域模型,通过模型数据判别图形中的极不对称支线以及重叠或交叉区域,进而根据判别的结果对图形的整体对称化处理以及重叠或交叉区域的消除,最终完成整条馈线的绘制。最后以10 k V辐射状配电馈线为例对算法进行验证,结果表明算法能在数秒内完成典型配电网络布局,适用于更广泛的配电网可视化分析应用。

Insulation coordination design is one of the key technologies for the design of the voltage sourced converter based HVDC (VSC-HVDC) projects. The principles of the insulation coordination for the VSC-HVDC converter station were summarized in the paper. Based on the main wiring design and the parameters of the primary equipment for a±350kV/1200MWVSC-HVDC project, two different insulation coordination schemes were introduced for the VSC-HVDC converter stations in the paper. And the parameters of the MOA in the VSC stations were determined considering the temporary overvoltage levels. The margins for insulation coordination of the VSC stations were presented. According to the protective levels of the MOA, the insulation levels of the main circuit equipmentin the station were determined. The results benefit the application of the±350kV/1200MWVSC-HVDC technology.

As more and more distributed generation access to distribution network, the active distribution network has become the future development trend of the distribution network. This paper introduces the difference of planning between the active distribution network and the traditional distribution network, and proposes the basic process of the planning in active distribution network; Through the introduction of the deficiency of the planning in traditional distribution network, and then discusses the key elements of the planning in active distribution network, including planning objectives, active management measures, power prediction, comprehensive assessment of planning scheme.

为深入研究油纸绝缘老化状态与介质内部弛豫响应的内在联系,首先对去极化电流(DC)内部弛豫特性进行研究,引入弛豫谱线和弛豫谱线能量这2个新特征量,其次应用二次微分法确定去极化电流弛豫谱线个数,并探讨弛豫谱线个数及弛豫谱线能量与绝缘老化状况间的关系,从而得到油纸绝缘老化的判别方法.研究结果表明,随着绝缘系统老化程度加重,去极化电流所含的弛豫谱线个数增加,且弛豫谱线能量对老化变化灵敏,它随绝缘水平的降低而显著增加.因此,弛豫谱线个数和弛豫谱线能量可作为绝缘诊断的判据,其为准确评估油纸绝缘老化状态提供一种可靠有力的分析手段,具有一定的参考价值.更多还原

In order to suppress the circulating current from the energy storage device, using the average power sharing control. get the outer ring of power output by the PI control, Superimposed on the converter output AC voltage command as a correction, By Matlab/Simulink software for off-grid simulation analysis to verify the control strategy. Results of this study indicate that adding power balance control in multi-parallel system, which can effectively pre-inverter circulation to ensure that each storage device load sharing to work.

移动式储能装置可用于电力系统移动应急供电,具有良好的适应性、经济性及环保性;可调节变压器的输出功率,稳定节点电压水平以及削峰填谷,主要介绍了移动式储能装置的充放电控制策略,包括电池组的能量均衡控制和PCS双向变流器的控制.

配电网故障恢复是指在故障定位和隔离的基础上使无故障的停电区域恢复供电,其目标是在允许的操作条件和电气约束下,通过网络重构尽可能多地将停电区域的负荷转供到正常的馈线上,其最终得到的解是一系列开关组合.

In order to quantify the investment risk of UHVDC system, take into account both input costs and output efficiency of this transmission project. Base on the theory of LCC, the model is established by taking into consideration the investment cost, operation cost which contained the running wear of line and transformer, maintenance cost, fault cost and put forward an estimation equation for disposal cost, on the basis the cost structurally decompose into the device layer, the system layer and the cost of the surroundings, the concept of regional layer costs is presented by considering of the influence on UHVDC system, like DC bias and commutation failures caused by accidents of AC system, so as to build more comprehensive LCC model. And then calculate integrated benefit from the angle of brand value, sales revenue, cutting down carbon intensity and estimate the yield rate in 60 years. By using of CVaR, combining with the Monte Carlo method so as to quantify the risk of UHVDC system and predict the maximum loss with 95% and 99% confidence level aiming at further deepening the investment management of UHVDC system. Put some advice on the plan of time and space for it to connect to Fujian province.

Depolarization current analysis is a better method for reflecting characteristics of the polarization process of dielectric response. The inner relaxation characteristics of depolarization current are studied in this paper. Two new characteristic quantities including sub-lines and its energy are introduced so as to further analyze the relationship between sub-lines energy and aging condition of oil-paper insulation, and the correspondence between sub-lines and the compositions of oil-paper insulation. And then a method to distinguish aging condition of oil-paper insulation is derived. Results show that, the sensitivity of sub-lines energy is sensitive to aging condition, sub-lines energy increases with the lower insulation level .The state of insulating oil is closely related to sub-lines of small time constant. The state of insulating paper is closely related to sub-lines of big time constant. So, depolarization current sub-lines and its energy can be accepted as the criterion of insulation diagnosis. The research will be one of effective means in the assessment of oil-paper insulation aging status.