Distribution Network Automation System Research Articles

Research on Quantitative Security Protection Technology of Distribution Automation Nodes based on Attack Tree

In order to improve the security of distribution automation system nodes and ensure the safe operation of distribution network, a quantitative security protection technology for distribution automation nodes based on attack tree is proposed. This paper analyzes the factors of node risk assessment of the distribution automation system, and through the evaluation and analysis of node vulnerabilities; it discovers the faulty nodes in the distribution automation system in advance. Based on the node vulnerability evaluation results of the distribution automation system, the risk of the distribution automation system is comprehensively evaluated using the attack tree. Establish the distribution network control model under network attack, locate the fault node, and use trusted computing technology to design trusted distribution terminals. When the amount of data is large, more effective symmetric encryption algorithm SM4 is required to achieve node security protection in the distribution network automation system. The experimental results show that the method has high fault node location accuracy, low reliability calculation time, and the distribution automation system network has certain robustness, which fully verifies the application effect of the method.

Research on Key Technologies of Power System Automation in Smart Grid

The paper summarizes the construction mode of distribution network automation system, and sorts out the operating characteristics of centralized intelligent mode and distributed intelligent mode. In view of the construction and operation of China’s distribution network automation system, point out common problems in system construction, operation and management in most regions. At the same time, the paper proposes the optimization of distribution network automation technology based on the gravity search algorithm, and improves the algorithm. Finally, the improved gravity search algorithm is applied to the IEEE 6-node power system. The calculation results show that the active power loss and voltage obtained by the algorithm are Compared with the original state, the level has been greatly improved, which greatly improves the automation efficiency of the power system. In this paper, the gravity search algorithm is used to calculate the optimization of power system automation technology, and the algorithm is improved, which overcomes the shortcoming of easy convergence to the local optimum.

Research and implementation of information security for intelligent distribution network

The intelligent distribution network is an important hub for connecting power generation and users, and the security of its information is closely related to the stable operation of the power grid. In order to solve the contradiction between the security and real-time of information in intelligent distribution network according to Supplementary Provisions for Safety Protection of Medium and Low Voltage Distribution Network Automation System, an information security model of intelligent distribution network is proposed, after deeply studying AES encryption algorithm and SHA-256 authentication algorithm, using OPNET as simulation software for smart distribution network information to carryout transmission delay curve. FPGA is used as information security processing platform. We obtain the total delay, analyze the integrity and availability. The experiment proves that the intelligent distribution network information security processing solution satisfies the three elements of CIA information security, and has good confidentiality, integrity and availability.

配网自动化系统在胜利油田区域电网的应用与实践

配网自动化系统在胜利油田区域电网的应用与实践

A Physical Probabilistic Network Model for Distribution Network Topology Recognition Using Smart Meter Data

Given the considerable scale of distribution networks in urban and rural areas, as well as the lack of management records, adjustments of switches during the distribution system operation are poorly documented. Such deficiency results in the inaccuracy of models stored in the distribution network automation system, and thus misleads the state estimation. With the emergence of information and communication technology, a large number of the feeder and residential smart meter data are accumulated. Such data can help recognize the operation modes of distribution networks by analyzing the relationships between the on/off states of switches and the voltage correlations among buses. However, the limited quantity and quality of the sampling data restrict the implementation of data-driven recognition. In this paper, a physical-probabilistic-network (PPN) model applied for inferring overall operation mode of distribution networks is proposed. Based on which, a belief propagation-based algorithm is proposed for the inference even under situations when there are only partial bus voltages data available. Meanwhile, the required variable for inference can be reduced from the active trail analysis. Experiment results are used to compare its performance with classic methods and to prove its effectiveness and advantages.

Distributed Topology Identification Information Model of Distribution Network Based on IEC61850

This paper proposes a distributed topology information model based on IEC61850 to support the distributed topology processing function of the distribution network automation system. The information model expands the new logical nodes and common data classes for storing local topology information of local subgraphs and communication information of adjacent intelligent electronic devices. By using the distributed adaptation of graph connectivity algorithm and the extended IEC61850 information model, the dynamic topology identification function of the distribution network structure is realized. The extended information model and topology recognition algorithm are verified by the cyber-physical simulation system.

Study of Information Fusion of Distribution Network Automation and Digital Substation Automation

Information fusion of distribution network automation and digital substation automation can improve the efficient use of the digital substation’s distribution network data and strengthen the distribution network. The scheme adds a distribution network area controller for information interaction and integrally models distribution network and digital substation equipment based on the IEC 61850 protocol. This paper details the information fusion scheme of regional distribution network and substation automation system as well as the main function of the controller. The case study demonstrates that the fusion strategy can make the information collection more direct and the fault elimination more intelligent when dealing with the defects and faults of the distribution network.

中山配网故障定位分析快速复电系统的设计与实现

快速复电系统对低压故障定位一直以来缺乏足够的技术手段支撑，本文基于营配信息集成平台的电网模型数据、配网自动化系统故障信息和配变终端实时信息设计并实现配网故障定位分析快速复电系统。根据用户报障信息、电网故障信息和配变数据实现低压故障自动定位，为客户服务人员掌握第一手停电范围信息提供技术支持，有效指导抢修人员快速复电。研究成果在中山供电局进行示范应用，效果良好。 Rapid restoration system has lacked adequate technical support to low voltage fault location ever since. This paper designs and realizes a fault location technology analysis and rapid restoration system, based on data which are provided by grid model of information integration platform and fault information from distribution network automation system, and variable terminal real-time information. According to the user alarm information, fault information and terminal data, this system can automatically find out low-voltage fault location, offer technical support to customer service’s first-hand blackout range information, and also support effective guide to salvage crews restoring electricity. Research results set an example and are applied in Zhongshan power supply bureau, having a good effect.

Research on the Distribution Automation System Based on IEC61850

In order to solve interoperability of the distribution automation devices and Plug and Play issues, propose intelligent power distribution model based on IEC61850, Stratifie according to the method of information: Master level,feeder layer,the terminal layer,device layer, layer monitoring. Use the face of the object model of the distribution automation IED, at the same time, use abstract communication service independent of the specific communication technology model ACSI, Establish distribution network automation system communication system Follow the IEC61850 standard.