System Configuration Description Research Articles

Three-phase power transformer protection, automation and control specification using IEC 61850 system configuration description language

Three-phase power transformer protection, automation and control specification using IEC 61850 system configuration description language

A Novel SCL Configuration Method for Modeling Microgrids With IEC 61850

IEC 61850 is poised to be the communication standard of the future power networks. Due to its historical evolution, it focuses on substation automation and modeling its entities. There have been recent extensions in the standard's modeling to include other grid equipment as well as distributed generators. However, the configuration of the communication network, as it is outlined in IEC 61850-6, is very substation-focused and cannot be used for microgrids. The microgrid network is a wide-area network with multiple distributed generations (DGs) cannot be configured in a manner similar to a substation communication network detailed in IEC 61850-6. This is because the enhanced system configuration description language (SCL) files cannot be exchanged with each DG while this is not an issue for substation modeling. Also, this would result in multiple copies of enhanced SCL files and is not feasible to implement. Thus, there is a need to develop a process for configuring IEC 61850 based communication networks at the microgrid level. This paper proposes a central configurator and a step-by-step configuration procedure for modeling microgrids according to IEC 61850. Such a configurator assists in connecting IEDs in different locations and updates the system with the new deployment. The process is shown with a centralized microgrid protection scheme by employing a microgrid-level system configurator.

IEC 61850 as backbone for smart PAC systems

This paper discusses a working definition of smartness in protection, automation and control systems (PACS) in substations. A summary is given about the standard IEC 61850 features that support smartness, i.e., the data model, the multiple communication services, and the system configuration description language (SCL). With help of known examples of application functions for control, supervision, and protection, the building of smart systems out of the modules of IEC 61850 is demonstrated. From the possible architectures, the standardized redundancy is explained. The process bus is exploited in detail since it is seen by users as the core of a smart substation. In this context, attention is given also to the time synchronization in the μs range over the communication network, a rather new part of the standard. In the last part, all features are summarized and it is concluded that IEC 61850 may really be named the backbone for smart PAC systems.

Auto-Mapping and Configuration Method of IEC 61850 Information Model Based on OPC UA

The open-platform communication (OPC) unified architecture (UA) (IEC62541) is introduced as a key technology for realizing a variety of smart grid (SG) use cases enabling relevant automation and control tasks. The OPC UA can expand interoperability between power systems. The top-level SG management platform needs independent middleware to transparently manage the power information technology (IT) systems, including the IEC 61850. To expand interoperability between the power system for a large number of stakeholders and various standards, this paper focuses on the IEC 61850 for the digital substation. In this paper, we propose the interconnection method to integrate communication with OPC UA and convert OPC UA AddressSpace using system configuration description language (SCL) of IEC 61850. We implemented the mapping process for the verification of the interconnection method. The interconnection method in this paper can expand interoperability between power systems for OPC UA integration for various data structures in the smart grid.

Experimental Study on Gas Temperature Control for a High-Speed Heat-Airflow Wind Tunnel

AbstractIn this article, a practical temperature control issue of gas for a high-speed heat-airflow wind tunnel (HSHAWT) is solved. Based on the principal analysis and the system configuration description, the mathematical models to describe the dynamic characteristics of the fuel delivery system and the fuel combustion system are established. Two control frameworks of gas temperature for HSHAWT are proposed. One is to realize the gas temperature control by using the method that regulates the fuel flow rate on the basis of the air flow rate being a constant; the other is the two-loop cascade control framework that takes gas temperature as a controlled objective, fuel flow rate as a controlled object in the secondary control loop, and gas temperature as the controlled object in the main control loop. Furthermore, experimental comparative studies on the flow rate of fuel and temperature of gas are carried out by using a variety of control algorithms, and a satisfactory control effect on the gas temperature ...

Enabling Efficient Engineering Processes and Automated Analysis for Power Protection Systems

The reliable operation of power networks depends on the correct configuration of protection systems. These systems involve the coordination of devices across a wide area, each with numerous setting parameters. Presently, protection settings data are typically stored in various vendor-specific proprietary formats, which are difficult to access, interchange, and manipulate automatically. Consequently, the engineering processes for implementing modern protection systems are extremely complex, involving multiple software tools from different vendors. This paper presents a novel solution to these challenges, through the use of the data model provided by the IEC 61850 standard, with the System Configuration description Language (SCL) format to represent protection settings data. The design of a Protection Setting Conversion Tool (PSCT) that can automatically convert existing settings data between proprietary formats and the SCL-based format is presented. A case study of its implementation demonstrates the benefits of the common representation of protection settings for network operators and other stakeholders. This paper also addresses the challenges that network operators face in migrating to the new approach from existing legacy protection devices and data formats. Adoption of these recommendations and design approaches would shift protection systems from being largely single-vendor solutions to becoming efficient and truly open platforms, capable of supporting future intelligent applications and tools such as automated protection settings validation, diagnostics, and system simulation.

An Open Platform for Rapid-Prototyping Protection and Control Schemes With IEC 61850

Communications is becoming increasingly important to the operation of protection and control schemes. Although offering many benefits, using standards-based communications, particularly IEC 61850, in the course of the research and development of novel schemes can be complex. This paper describes an open-source platform which enables the rapid prototyping of communications-enhanced schemes. The platform automatically generates the data model and communications code required for an intelligent electronic device to implement a publisher-subscriber generic object-oriented substation event and sampled-value messaging. The generated code is tailored to a particular system configuration description (SCD) file, and is therefore extremely efficient at runtime. It is shown here how a model-centric tool, such as the open-source Eclipse Modeling Framework, can be used to manage the complexity of the IEC 61850 standard, by providing a framework for validating SCD files and by automating parts of the code generation process. The flexibility and convenience of the platform are demonstrated through a prototype of a real-time, fast-acting load-shedding scheme for a low-voltage microgrid network. The platform is the first open-source implementation of IEC 61850 which is suitable for real-time applications, such as protection, and is therefore readily available for research and education.

An Analytic Model of the VM/370 System

This paper describes an analytic model of an interactive multiprogrammed computer system. The model accepts a multiple-user-class, transaction-oriented workload description and a system configuration description, and it produces predictions of resource utilizations, transaction rates, and average transaction response times. The solution method involves nearly complete decomposition, with a closed queuing network representing the multiprogrammed set. Asymptotic formulas are used to generate good initial guesses for an overall iterative scheme. Extensive validation results are presented.