Dinesh Rangana Gurusinghe

RTDS Technologies Inc., Winnipeg, Canada · Protection & Automation

This paper presents the implementation of a generic load shedding relay model in a digital real-time simulator (DRTS) that comprises both frequency and voltage based load shedding schemes. The relay model offers three frequency estimation methods, supports multiple load shedding stages and provides a variety of monitoring signals in addition to rel...

IEC 61850 standard series offers, among other things, convenient and flexible methods of carrying out testing in SASs. Logically isolating IEDs using the simulation feature and monitoring the status of subscriptions for GOOSE and SV communication via dedicated LN classes are two of the most useful features introduced in Edition 2 of IEC 61850 stand...

Protection systems are increasingly relying on devices that require IEC 61850-9-2/ IEC 61869-9 sampled value (SV) protocol. Non-genuine and non-ideal SV streams could cause protection systems to malfunction and result in serious damage to power system apparatus and lead to cascading failures. SV-based protection functions must be evaluated against...

Over the last few decades, power and energy systems have undergone an evolution that demands advanced system analysis and testing in order to ensure security and reliability. Modern digital real-time simulators are capable of performing highly detailed Electro-Magnetic Transient (EMT) type simulations of complex power and energy systems, where the...

The current standard for synchrophasors, i.e. IEC/IEEE 60255-118-1:2018, specifies error limits to evaluate electrical performances of phasor measurement units (PMUs). However, the standard specifies neither test plans nor error calculation methods; leading to ambiguities in PMU testing as different test procedures and calculations may produce diff...

Synchrophasors produced by phasor measurement units (PMUs) are widely used in modern power systems for wide-area monitoring, protection and control applications. Contemporary technology allows a PMU to acquire its instantaneous voltage and current inputs digitally from sampled values (SV). This work investigates the electrical performance of two co...

With digital communication technologies continuing to grow in performance and reliability, a fully digital substation automation system (SAS) with a sampled values based process bus has become a realizable prospect in the foreseeable future. This, however, demands additional work in engineering configurations and tightens the existing constraints o...

In recent years, microgrids have become increasingly common in power systems around the world. Microgrids have complex control and operational requirements, thus, a dedicated communication network is often a requisite for its functionality. Due to economic and logistical concerns, it is also desirable to keep the communication system as simple as p...

IEC 61850 has become the preferred standard for substation automation for many utilities around the world. However, its provisions to automate control systems in a substation remain a lesser-discussed topic of the IEC 61850 standard series. Testing and validation of control systems in an electrical substation such as high voltage switchgear control...

Presently, synchrophasor measurement technology is primarily used for monitoring applications; however, its potential for closed loop automatic control is not fully utilized. Synchrophasor measurements, when combined with advanced telecommunication infrastructure, enables real-time observation of the dynamics of an interconnected power system sprea...

With digital communication technologies continuing to grow in performance and reliability, a fully digital substation automation system (SAS) with a sampled values based process bus has become a realizable prospect in the foreseeable future. This, however, demands additional work in engineering configurations and tightens the existing constraints o...

High voltage switchgear in an electrical substation can operate in response to either a trip or a switch (opening and closing) command. Typically, protection and control intelligent electronic devices (IEDs) at bay level possess the authority to issue trip commands to circuit breakers, which are directly communicated and often carried out without d...

A microgrid is a portion of a distribution network and is commonly designed to operate in parallel with the power grid or autonomously as a power island. Therefore, islanding detection is one of the key aspects of grid connected microgrids. In literature, performances of islanding detection methods are largely tested with offline simulation tools a...

Many commercial phasor measurement units (PMUs) extract phasors using the standard discrete Fourier transform (DFT) that has some inherent drawbacks such as leakage and picket fence effects. The standard DFT based PMUs employ additional filtering to overcome these effects, but the smart DFT (SDFT) algorithm is capable achieving the required accurac...

Accurate transmission line parameters are important for many applications that ensure reliable operation of a power system. The traditional theoretical calculations and offline measurements are widely used approaches obtaining line parameters, but they do not allow tracking of the parameters that change with the environmental factors and load condi...

The rapid advance of synchrophasor technology and the growth of phasor measurement unit (PMU) installations in the recent years have substantially increased the feasibility of deploying practical synchrophasor applications. These novel applications need to be thoroughly evaluated before their actual implementations on real power systems. The most f...

This thesis investigates novel ways to utilize the potential of wide area synchrophasors for improved real-time monitoring and control of power systems. The performance of phasor measurement units (PMUs) was examined at the outset, since the accuracy and consistency of synchrophasor applications heavily rely on the input measurements. Two performan...

This paper presents a novel method to early predict the transient stability status of a power system after being subjected to a severe disturbance. The proposed technique is based on rate of change of voltage vs. voltage deviation (ROCOV-ΔV) characteristics of the post-disturbance voltage magnitudes obtained from synchrophasor measurements. Converg...

This paper presents a novel method to early predict the transient stability status of a power system after being subjected to a severe disturbance. The proposed technique is based on rate of change of voltage vs. voltage deviation (ROCOV-ΔV) characteristics of the post-disturbance voltage magnitudes obtained from synchrophasor measurements. Converg...

Steady-state and dynamic performances of phasor measurement units (PMUs) are critically important to ensure reliable and secure operation of the synchrophasor based wide area monitoring, protection, and control (WAMPaC) systems. Therefore, it is essential to assess PMU performances in the different stages of PMU life cycle; from research and develo...

The rapid growth of synchrophasor technology, especially increment of phasor measurement unit (PMU) installations in recent years, demands to develop novel synchrophasor applications for improving real-time operation and control in power system. In [1], [2], authors proposed a novel algorithm to classify the transient swings in the post-disturbance...

Analysis of the impact of communication network infrastructure performance on critical power system applications that rely on wide area synchrophasor measurements can be realistically achieved only through co-simulation of the power system and the synchrophasor communication network. In this paper, a single simulation platform, an electromagnetic t...

This research present a novel method for prediction and control of transient instability of power system using wide area synchrophasors. The proposed approach is two fold; a transient stability status prediction algorithm followed by a transient instability mitigation scheme. The earlier classifies the transient swings in the post-disturbance stage...

Phasor measurement units (PMUs) provide the basis for synchrophasor measurements, which are good data sources for capturing power system dynamic behavior. The recently published IEEE Standard C37.118.1-2011 characterizes the dynamic performance of synchrophasor measurements with two performance class filters: P-class and M-class. Practical implemen...

Reliable operation of power systems requires detailed models of the network during system studies. Transmission line parameters are essential for accurate simulation results as many of power system studies depend upon the precision of transmission line parameters. In this paper, a noise adaptable synchrophasor based real-time parameters monitoring...

Currently, synchrophasor measurement technology is primarily used for monitoring applications; however, its potential for use in stability enhancement, especially transient stability status prediction is not fully utilized. Synchrophasor measurements, when combined with advanced telecommunication infrastructure, enables real-time observation of the...

Phasor measurement units (PMUs) provide the basis for synchrophasor measurements, which are good data sources for capturing power system dynamic behavior. The recently published IEEE Standard C37.118.1-2011 characterizes the dynamic performance of synchrophasor measurements with two performance class filters: P-class and M-class. Practical implemen...

The process of development of synchrophasor based wide area control applications heavily rely on simulations. When using synchrophasors for applications that involve fast phenomena, it is important to accurately model the phasor measurement unit (PMU). The accuracy and the consistency of PMU performance during transient conditions is achieved by us...

It is critically important to understand steady-state and dynamic performance of phasor measurement units (PMUs) to ensure reliable and secure operation of the synchrophasor based wide area monitoring, control, and protection systems. The recently published IEEE Standard C37.118.1 provides necessary guidelines to characterize both steady-state and...

An efficient approach to determine the voltage collapse point greatly assists planning and operation of power system, but most of existing methods are engaged with several power flow computations and they do not provide the optimal operating condition, which is the maximum loading point of a system without exceeding the power limits of generators....

The recently published IEEE C37.118.1 standard describes the requirements and performance evaluation criteria for the phasor measurement units (PMUs) under steady-state and dynamic conditions. It specifies two performance class filters: P class and M class, preferred for applications demanding fast and more accurate applications respectively. The s...

In electrical power systems, saddle node bifurcation (SNB) is the voltage stability margin at which voltage collapse takes place. It plays an important role in power system planning and operation as economic and environmental pressures force to operate always closer to the limit of stability. Voltage collapse is associated with the reactive power d...

The purpose of this research is study of long-term generation expansion plan (2010-2020) of power system - Sri Lanka, analysis of technical & economical constraints of existing, committed, and candidate plants of the system and formulation of a suitable mathematical model for the optimization problem for the basecase (Year 2012). In this research,...

In electric power systems, Saddle Node Bifurcation (SNB) is the voltage stability margin at which voltage collapse takes place. It plays an important role in power system planning and operation as economic and environmental pressures force to operate always closer to the limit of stability. Voltage collapse is associated with the reactive power dem...

Unit Commitment is a term used for the strategic choice in which of the available power plants have to be online at every time. Most unit commitment models described in the literature are specially designed for the power utilities. They are typical short-term models for relatively small power systems. Apart from practical use in the utilities thems...