Investigation of Using IEC 61850-Sampled Values for Implementing a Transient-Based Protection Scheme for Series-Compensated Transmission Lines (original) (raw)
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A Review on Protection of Transmission Lines
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The term digital substation refers to the process of managing operations between intelligent primary devices and distributed Intelligent Electric Devices (IEDs) interfaced with a highly secure communications network. The process bus is the first part of the interface between the primary instruments (such as the current and voltage transformers and protection devices) and is an important part of digitalization. This paper describes a method for constructing an interface between measurement instruments and protection devices based on the IEC 61850 standard. Two scenarios are considered to examine the performance of the power system protection in a transmission line between two substations. Both a conventional and an IEC 61850-9-2 (sampled values) approach are implemented to feed the measured values to the protection devices. Trip signals are then also sent to the circuit breakers using IEC 61850-8-1 (GOOSE message). Comparing this method with conventional technology, the outcomes for the digital substation are more accurate and reliable thanks to the rapid reaction of protection devices and the speed at which the trip signal is received. The new process bus method has been tested by implementing a hardware-in-the-loop platform, consisting of a real-time simulator (OPAL-RT eMEGAsim), StandAlone Merging Units (SAMUs), and line differential protection.
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This paper describes a protective relay for fast and reliable transmission line protection that combines elements that respond only to transient conditions with elements that respond to transient and steady state conditions. In this paper, we also present an algorithm that prevents Zone 1 distance element overreach in series-compensated line applications and show how to prevent corruption of the distance element polarization during pole-open conditions. We also introduce an efficient frequency estimation logic for single-pole-tripping (SPT) applications with line-side potentials. This logic prevents distance element misoperation during a system frequency excursion when one pole is open. We also discuss an algorithm and logic to prevent single-pole reclosing while the fault is present, avoiding additional power system damage and minimizing system disturbance. Applying these algorithms and logics results in a protective system suitable for increasing power system requirements such as heavy loading, SPT, series line compensation, and shunt line compensation.
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The chapter includes protection power systems based on the IEC 61850 protocol for data communication systems between substations. The IEC 61850 is adequate for real time communication between IED based on GOOSE messages. The chapter includes the case study from the Romanian power systems: implementation of protection and remote control system in transformer station 110 kV/20 kV Laminor, using IEC 61850. Keywords IEC 61850 • Protection • IED • SBO • GOOSE 29.1 Introduction The protection and automation system of a station depends on the development and availability of microprocessor-based systems. Thus, the equipment from the power station transformation have been evolved from simple electromechanical devices to the digital robust terminals namely intelligent electronic devices (IED-Intelligent Equipment Device) used to perform specific required functions (for example, protection, monitoring and local/remote control). Until now, the specific proprietary communication protocols have been used, developed by each manufacturer in particular manner, requiring complex protocol converters and expensive when IEDs are used from different suppliers. Therefore, there was need to develop an effective protocol for communication between the IEDs, in order to ensure the interoperability. IEC 61850 is a standard protocol for the automation, design of the transformer power stations developed by the International Electrotechnical Commission (IEC), M. Gaiceanu (B) • I.
IJERT-An Overview-Protection Of Transmission Line Using Artificial Intelligence Techniques
International Journal of Engineering Research and Technology (IJERT), 2013
https://www.ijert.org/an-overview-protection-of-transmission-line-using-artificial-intelligence-techniques https://www.ijert.org/research/an-overview-protection-of-transmission-line-using-artificial-intelligence-techniques-IJERTV2IS1511.pdf This article presents a survey of the developments in digital relays for protection of transmission lines. For a modern power system, selective high speed clearance of faults on high voltage transmission lines is critical and this survey indicates the efficient and promising implementations for fault detection, classification and fault location in power transmission line protection. The work done in this area favor computerized relays, digital communication technologies and other technical developments, to avoid cascading failures and facilitate safer, secure and reliable power systems. Efforts have been made to include almost all the techniques and philosophies of transmission line protection reported in the literature up to 2012. The focus of this article is on the most recent techniques, like artificial neural network, fuzzy logic, fuzzy-neuro, fuzzy logic-wavelet based and phasor measurement unit-based concepts as well as other conventional methods used in transmission line protection.
—This paper describes a protective relay for fast and reliable transmission line protection that combines elements that respond only to transient conditions with elements that respond to transient and steady state conditions. In this paper, we also present an algorithm that prevents Zone 1 distance element overreach in series-compensated line applications and show how to prevent corruption of the distance element polarization during pole-open conditions. We also introduce an efficient frequency estimation logic for single-pole-tripping (SPT) applications with line-side potentials. This logic prevents distance element misoperation during a system frequency excursion when one pole is open. We also discuss an algorithm and logic to prevent single-pole reclosing while the fault is present, avoiding additional power system damage and minimizing system disturbance. Applying these algorithms and logics results in a protective system suitable for increasing power system requirements such as heavy loading, SPT, series line compensation, and shunt line compensation.