Power Grid Automation Research Articles

Power Grid Resource Integration of Enterprise Middle Station based on Analytic Hierarchy Process

With the transformation from smart grid to power Internet of Things, new power businesses such as power grid automation and power quality monitoring are constantly emerging. The load environment of power grid is changeable. In order to meet the needs of multi-service, the integrated access scheme for power grid resources in power enterprises is gradually diversified, which brings challenges to the unified management and control of power grid communication network. In this paper, SDN technology is used to improve the operation and maintenance management and control of power communication network, which aims at the integration scheme of power grid resources in power enterprises. Based on the controller cluster technology, combined with the new power business requirements, this paper designs a software-defined network centralized control architecture of the new business of power communication network. The architecture realizes the operation and maintenance management of network resources under the centralized control architecture of typical enterprise scenarios, such as power grid enterprises. The convergence speed is improved by 27%. The minimum value of iterative convergence is 31% better than that of other methods. The system requirement is reduced by 13.5%, which is helpful to improve the efficiency of node dynamic allocation and ensure the need of large-capacity data transmission of smart grid. The research in this paper can realize the two-way interaction, real-time expansion and unified deployment of power business in the future, and promote the intensive and lean development of power communication network.

Analysis of the Power Grid Automation System Architecture Based on Distributed Scheduling

As the core content of urban power dispatching operation in the new era, power grid automation can ensure the safety and stability of urban power consumption on the basis of reducing resource consumption. Using the distributed scheduling method in the system can not only improve the quality of power transmission, but also improve the speed of system operation. Therefore, on the basis of understanding the distributed task scheduling method, this paper analyzes the independent task dynamic optimization level scheduling algorithm based on MPSoC, and carries on the in-depth understanding of the practical application effect, so as to prove the positive role of distributed scheduling in the application of power grid automation system.

Research and application of graphic software architecture for power grid dispatching control system

Currently, the independent design and development of power grid automation system cannot meet the urgent requirements of integrated system for electric dispatching, monitoring and synthetic analysis and decision-masking. In accordance with this situation, a general power grid dispatching control graphics software architecture based on the modular hierarchical theory is proposed. The architecture extracts and abstracts the common modules of different system graphics software architectures to build an integrated basic development platform. Based on this platform, an integrated graphical interactive software for power grid dispatching, power distribution network or substation supervision can be quickly developed. In this paper, the overall architecture, modular hierarchical theory, graphics general API and the key technologies for this architecture are described in detail. This architecture has been applied to the development of multiple power grid control graphics software, and the engineering application is performing well in reality. In a word, the architecture proposed in this paper satisfies the needs of power grid control integration, and effectively reducing system

A Multi-Layer Security Scheme for Mitigating Smart Grid Vulnerability against Faults and Cyber-Attacks

To comply with electric power grid automation strategies, new cyber-security protocols and protection are required. What we now experience is a new type of protection against new disturbances namely cyber-attacks. In the same vein, the impact of disturbances arising from faults or cyber-attacks should be surveyed by network vulnerability criteria alone. It is clear that the diagnosis of vulnerable points protects the power grid against disturbances that would inhibit outages such as blackouts. So, the first step is determining the network vulnerable points, and then proposing a support method to deal with these outages. This research proposes a comprehensive approach to deal with outages by determining network vulnerable points due to physical faults and cyber-attacks. The first point, the network vulnerable points against network faults are covered by microgrids. As the second one, a new cyber-security protocol named multi-layer security is proposed in order to prevent targeted cyber-attacks. The first layer is a cyber-security-based blockchain method that plays a general role. The second layer is a cyber-security-based reinforcement-learning method, which supports the vulnerable points by monitoring data. On the other hand, the trend of solving problems becomes routine when no ambiguity arises in different sections of the smart grid, while it is far from a big network’s realities. Hence, the impact of uncertainty parameters on the proposed framework needs to be considered. Accordingly, the unscented transform method is modeled in this research. The simulation results illustrate that applying such a comprehensive approach can greatly pull down the probability of blackouts.

Hierarchical Information Fault Diagnosis Method for Power System Based on Fireworks Algorithm

Power system fault diagnosis is an important means to ensure the safe andstable operation of power system. According to the specific situation ofChina’s current power grid automation level, a hierarchical fault diagnosismethod based on switch trip signal, protection information and fault record-ing information is proposed. This method can not only diagnose simple faultand complex fault, but also judge fault type and phase, and complete faultlocation, which provides reliable guarantee for operators to quickly removefault and resume operation. The diagnosis method based on this principle hasgood application effect in simulation test.

SDN-based cross layer resilience approach for secondary distribution power grid automation: Review and recommendation

SDN-based cross layer resilience approach for secondary distribution power grid automation: Review and recommendation

Research on Integrated Construction Mode and Key Technologies of Regional Power Grid Dispatching System

This paper proposes a technical solution for the construction of an integrated system based on regional power grid dispatching system. The program is based on the principle of “economical application, resource reuse, information sharing, safety and reliability”. the scheme utilizes the software and hardware platform resources in the main network dispatching automation system in operation, and uses the modular construction method to construct the function of the distribution network automation master station. The key technologies used in the construction of the integrated system are described. The regional power grid deployment integration system is the trend and direction of power grid dispatching and distribution network dispatching system construction in small and medium-sized regions, and it is an effective way to rapidly promote power grid automation construction in small and medium-sized regions. A new scheme for the construction of the main distribution network integrated dispatch control system was explored.

Reliability Based Genetic Algorithm Applied to Allocation of Fiber Optics Links for Power Grid Automation

In this work, we address the problem of allocating optical links for connecting automatic circuit breakers in a utility power grid. We consider the application of multi-objective optimization for improving costs and power network reliability. To this end, we propose a novel heuristic for attributing reliability values to the optical links, which makes the optimization converge to network topologies in which nodes with higher power outage indexes receive greater communication resources. We combine our heuristic with a genetic algorithm in order to solve the optimization problem. In order to validate the proposed method, simulations are carried out with real data from the local utility. The obtained results validate the allocation heuristic and show that the proposed algorithm outperforms gradient descent optimization in terms of the provided Pareto front.

«Methodologies of forming constituents of vocational competence of future power grid automation engineers

«Methodologies of forming constituents of vocational competence of future power grid automation engineers

Lifetime analysis of wireless sensor nodes in different smart grid environments

Wireless sensor networks (WSNs) can help the realization of low-cost power grid automation systems where multi-functional sensor nodes can be used to monitor the critical parameters of smart grid components. The WSN-based smart grid applications include but not limited to load control, power system monitoring and control, fault diagnostics, power fraud detection, demand response, and distribution automation. However, the design and implementation of WSNs are constrained by energy resources. Sensor nodes have limited battery energy supply and accordingly, power aware communication protocols have been developed in order to address the energy consumption and prolong their lifetime. In this paper, the lifetime of wireless sensor nodes has been analyzed under different smart grid radio propagation environments, such as 500 kV substation, main power control room, and underground network transformer vaults. In particular, the effects of smart grid channel characteristics and radio parameters, such as path loss, shadowing, frame length and distance, on a wireless sensor node lifetime have been evaluated. Overall, the main objective of this paper is to help network designers quantifying the impact of the smart grid propagation environment and sensor radio characteristics on node lifetime in harsh smart grid environments.

Smart grid automation using IEC 61850 and CIM standards

An overview of basic IEC standards for smart grid applications is given and some examples of feasible information and communication technology for smart energy systems are shown. As ICT key standards for power grid automation, the two core standards IEC 61850 and IEC 61970 are presented in the paper. Protection automation relying on smart grid ICT technology is shown, and the hurdles to be overcome for the realization of smart grid automation are discussed. Practical examples for are demonstrated. One approach of making different standards work together is presented, which today is still not sufficiently solved and is a main hurdle on the way towards a seamless smart grid automation system.

Study on Classification of Information to Realize Grid Intelligent

The accsess of large numbers of new energy and the difference of application requirements make information more huge and complex, different application system and different grid link has also a different protocol standards,All these make the visual display of information, unified modeling for power grid automation become complicated and trival. This article according to analysis the power grid stability and control theory, from the power grid stability and controlling ,the needed information and IEC61968 / IEC61970 / IEC61850 and other international standards are analyzed, and propose a power network information classification method, and get a power information classification, accord with smart grid construction and new energy access requirements. It can effectively direct building of power automation control model, control information interaction. Provide foundation support for grid unified modeling and the method of unified describe model.

Protecting Smart Grid Automation Systems Against Cyberattacks

The smart grid moves new power grid automation systems from being proprietary and closed to the current state of information technology (IT) which is highly interconnected and open. But open and interconnected automation platforms bring about major security challenges. The power grid automation network has inherent security risks due to the fact that the systems and applications for the power grid were originally designed without much consideration of cybersecurity. This paper first introduces scope and functionalities of power grid, its automation and control system, and communications. Potential cyberattacks and their adverse impacts on power grid operation are discussed, a general SCADA cyberattack process is presented. This paper discusses the major challenges and strategies to protect smart grid against cyberattacks and finally proposes a conceptual layered framework for protecting power grid automation systems against cyberattacks without compromising timely availability of control and signal data. The proposed “bump-in-the-wire” approach also provides security protection for legacy systems which do not have enough computational power or memory space to perform security functionalities. The on-site system test of the developed prototype security system is briefly presented as well.