In recent years, due to the rapid development of the national economy, the country has invested heavily in the distribution network, resulting in many new problems in the planning of urban distribution networks. The distribution network auxiliary decision-making system was adopted to improve and expand the existing public information mode, enabling various systems in the distribution network to effectively transmit information, thereby better achieving information fusion of various systems in the distribution network. In the auxiliary decision-making system, intelligent perception and big data technology were integrated to proactively discover and solve problems. In the 10 node tests selected in this article, the power supply safety score was 8.9 and the system reliability score was 8.1. The distribution network fault diagnosis and auxiliary decision-making plan provided in this article is for the power company to develop maintenance plans and improve the reliability and stability of power supply.

At the present time, Distribution automation FA deployed at the outgoing intervals of the substation, In the event of a fault on the line, the fault is isolated by tripping the outgoing switch at the substation,But, Easily expanding the scope of fault when complex lines are involved, At the same time, the substation outgoing interval data can not be effectively direct mining led to distribution network,so, FA can not be put into normal operation, further resulting in an increase in the number of power outage users, In order to address the above issues, Deployment of FA on smart 5G switches with three-remote function for 10kV lines in distribution networks, And redesign the launch strategy of the FA, The occurrence of 5G switch tripping necessitates the implementation of protective measures on the line as the FA start condition. When faults accurt, Isolation of faults in close proximity by the 5G switch on the line, Reducing the scope of power outages. The program has been put into use in one of the Chinese districts with remarkable results

Due to the characteristics of volatility, intermittence and uncertainty of distributed photovoltaic, when large-scale distributed photovoltaic is connected to the power grid, it will cause photovoltaic power curtailed. Therefore, a multi-level consumption strategy for access to distributed photovoltaic distribution network is proposed. Firstly, this paper studies the topology of a new energy router, and proposes a new AC/DC hybrid distribution network architecture based on it. Then, according to the operation characteristics of AC/DC hybrid distribution network, the coordinated control strategy of four-level consumption including bus consumption, cross-bus consumption, cross-area consumption and energy return to the grid is studied in detail, which avoids the direct injection of photovoltaic power into the distribution network and reduces the energy exchange between the station areas and the grid. Finally, in the Matlab/Simulink simulation environment, the distributed photovoltaic four-level consumption is simulated and verified, and the results prove the effectiveness of the proposed multi-level consumption strategy.

A fault protection method is proposed for flexible direct-current (DC) power systems based on the cosine similarity of currents in current-limiting reactors. The typical characteristics of external and internal faults in a flexible DC power system were analyzed. The principles of cosine similarity and the fault current characteristics of current-limiting reactors were used to distinguish between internal and external faults. The ratio of the average positive and negative voltages of the current-limiting reactor was then used to distinguish the fault types and fault line. Finally, a simulation model of a circular flexible DC power system was constructed using MATLAB/Simulink software (2018b). The simulation results show that the proposed protection scheme can quickly and accurately identify the location and type of faults, and has a strong ability to withstand fault resistance and is less affected by distributed capacitance, noise, and communication delay.

In order to improve the friendly interaction and control ability of "source network load and storage" in distribution network, an AC-DC hybrid distribution network architectture based on multi-port energy router is proposed. The interface information is obtained by establishing the information physical model of each unit in the proposed architecture, and the system energy management scheme is designed. According to the designed energy management scheme, the coordinated control strategy of energy balance among distributed generation, energy storage system, distribution network and load is studied. The working mode and switching of the system are determined only by the interface information, without additional centralized controller, which improves the reliability of the system. Finally, MATLAB software was used to build a simulation platform to verify the effectiveness of the proposed DC hybrid distribution network energy router topology and energy management scheme.

The total supply capacity of the distribution system can intuitively reflect the power supply capacity of the existing distribution network SCDN (Substation Centralized Distribution Network) is a kind of 10 kV network centered on the 10 kV bus of a high-voltage substation and covering all its power supply through a large number of interconnected generalized switches. Studying the total supply capacity of SCDN is helpful to understand the characteristics of medium voltage network obtained by SCDN which is a new distribution network segmentation method. Firstly, the large and complex urban distribution network is formed into several power supply networks centering on high-voltage substations, and then the total supply capacity of each substation is calculated from the perspective of substations, so as to obtain the total supply potential of the whole network. The case shows that the solution method of total supply capacity of SCDN supply area effectively mines the power supply capacity of SCDN supply area effectively mines the power supply potential of the network. Compared with the solution model of total supply capacity based on feeder interconnection, it mines about 72.44

在智能操作票系统的研发中,调电操作票的设计需要对配网故障或者检修的停电范围及线路转供路径进行评估,考虑到电网超大规模的实际因素,常规的关系型数据库难以支撑电网的实时划分和转供电方案的决策.为解决这个问题,通过结合Dijkstra、深/广度优先搜索等图论算法,提出了一种基于图数据库的大规模电网故障影响区域划分和转供电决策方案,实现了调电过程中的最优路径规划,并将其应用在调电操作票的设计当中,实现开票快、准的设计要求.该方案除了应用在操作票系统当中,还可以应用到其他场景中,如电网因故障或检修需要调电时,可以直接给出最优调电方案供调控员使用,能够节省电网调度的经济成本,降低电力传输过程中的电能损耗,避免人为因素导致的电力调度决策失误问题,与目前我国电力行业的"碳中和"目标相符合.为超大规模电网转供电方案的自动规划和选择提供了一种可行的参考案例.

This research introduces a novel and promising approach to optimize the deployment of drone nests for transmission line inspection by enhancing the Particle Swarm Optimization (PSO) algorithm with penalty functions and dynamic inertia. By effectively utilizing penalty functions, the study addresses the constraints of the optimization problem, transforming it into an unconstrained optimization task and allowing for more effective exploration of the search space. Additionally, the dynamic inertia strategy enables the algorithm to strike a balance between global exploration and local exploitation, leading to improved convergence rates and enhanced solution quality. Through a comprehensive comparison with both static inertial weight PSO and genetic algorithm (GA), the enhanced PSO algorithm exhibited superior performance, highlighting its ability to efficiently overcome the limitations of traditional algorithms and optimize the placement of drone nests effectively. The proposed approach demonstrates encouraging results in minimizing flight costs and generating near-optimal solutions for large-scale drone nest placement problems. The study's modest yet significant contribution lies in its potential to advance intelligent drone-based inspection platforms, offering the promise of increased inspection efficiency and potential cost savings for power grid inspections.

In terms of urban medium voltage distribution network interconnected by many Generic Switching stations (GSs), the Supply Region of Substation Centralized Distribution Network (S-SCDN) forms the largest stable and closed interconnected power supply region, and the feeder cluster (FC) is an interconnected feeder group outside substations, which is the smallest independently operational subnet of S-SCDN. To do further S-SCDN analysis, identifications of FCs and GSs become fundamental. Based on the introduction of related S-SCDN concepts and graph calculation, this paper presents the methodologies of FC identification as well as GS type identification based on graph calculation. Method verification is carried out on the S-SCDN data of a central urban distribution network in a real application.

针对主网110 kV、35 kV变电站全停,如何快速实现负荷的全停全转,本文提出了主配网智能联动的概念,设计了主配网智能联动装置,开发了主配网智能联动调度应用模块,将变电站的保护和配电自动化主站控制策略相结合,当主网变电站全停时,主配网智能联动装置自动判断10 kV母线是否故障,并上传至主配网智能联动调度应用模块,主站分析判断后启动配网线路倒送或全停全转模式,秒级恢复供电,实现电网故障时主配网快速治愈.

Substation centralized medium voltage distribution network (SCDN), makes the large-scale complex medium voltage network into a dynamic radial network with a fixed static topology and a central substation as a unique power supply source. A novel concept of "Supply Region of substation centralized medium voltage distribution network (S-SCDN)" is proposed to generate a "one map" as the core technology of the "urban distribution network brain". The prototype of SCDN and S-SCDN and single line diagram prototype are proposed, and their basic characteristics are studied. Then, the application scenario analysis based on S-SCDN single line diagram including a situation awareness dynamic visualization platform under SCDN/S-SCDN concepts is also proposed, which indicates that S-SCDN single line diagram provides a new analysis tool for urban complex distribution network with a wide application.

When the single-phase ground occurs in the power system with neutral point non-effectively grounding, the real-time awareness of magnitude and direction of the zero-sequence current is a difficult problem in engineering practice. In this paper, a zero-sequence fault diagnosis and wave recording system based on the transient components analysis is proposed. The proposed system can record the zero-sequence fault process completely, including the steady state before the fault, the transient state during the fault and both of the transient and steady state after the fault. In addition, the proposed system can analyze the fault data and process the transient components in pre-fault, mid-fault and post-fault. Through application analysis for waveform under various fault conditions and comparisons of line selection accuracy, the effectiveness of the method is verified. And the application result indicates that the proposed system can identify various type of faults effectively and improve the accuracy of faulty line selection.

<正>不断上涨的能源成本、日益堪忧的供应瓶颈和气候变化及其引发的经济后果,都不断促使世界各国实施能效的变革,这也为创新型企业提供了提高能源效率和改善竞争状态的机会。工业企业是中国能源消费大户,其能源消费量占中国能源消费总量的70%以上。作为在能效网络建设应用较为成熟的国家之一,德国在能效网络组建、运作以及活动组织等方面已积累了丰富的经验,对当

The work of ensuring power supply is the key ser?vice of electric power enterprises. A command system for the work of ensuring power supply based on visual interactive technology is introduced here. The design requirement,the main function and the key technical details of the system are introduced here . And the features of the system are analysised based on the pilot application of the system in the site work of ensuring power supply for 21th China Golden Rooster and Full Blossom Film Festival in Shaoxing.

<正>1用户专线线损计算存在的问题在电力系统中,计算线损的方法有很多,有均方根电流法、最大负荷损耗时间法、等效功率法等。但对于电力用户专线线损的计算,目前却五花八门,标准不一。目前在用户专线线损计算中,主要存在以下问题:

<正>用户用电设备指按照产权分界点的界定,由用电人承担运行维护责任的线路、变配电设备。由于用户自身缺乏电气设备运行维护的力量,对用电设备很少进行维护甚至不维护。一些用户从设备投产后,不

<正>1事故的经过2009年12月的一天,某施工单位在建造生产车间时,为赶进度,违章在高压线路下起吊楼板,导致与上方带电的110kV线路相碰,造成该线路跳闸。供电企业迅速派员赶到现场,经查,该110kV线路是供电企业的一条充电备

<正>如果你是一名抄表员,当发现某一用户电能表示数为零,你是否会熟视无睹,你是否意识到"零电量"背后复杂的原因?事实上,大量"零电量"用户对营销管理造成了不小的冲击。

Cogeneration is one of the important ways for energy conservation and emissions reduction.In the same way,the low-temperature waste-heat of glass industry can be used to generate electricity by the equipment based on the technology of low-temperature waste-heat recycle.By the technology application,we can greatly reclaim the waste gas and heat from glass furnace.It can not only economize energy resources and reduce heat waste,but also bring great economy benefit and social benefit.