A5044890760- Power System Optimization and Stability
- Microgrid Control and Optimization
- Optimal Power Flow Distribution
- Smart Grid Energy Management
- Smart Grid Security and Resilience
- HVDC Systems and Fault Protection
- Power Systems Fault Detection
- Frequency Control in Power Systems
- Real-time simulation and control systems
- Hybrid Renewable Energy Systems
- Energy Load and Power Forecasting
- Electric Vehicles and Infrastructure
- Integrated Energy Systems Optimization
- Numerical methods for differential equations
- Power Systems and Renewable Energy
- Power System Reliability and Maintenance
- Power Systems and Technologies
- Advanced Battery Technologies Research
- Vibration and Dynamic Analysis
- Tensor decomposition and applications
- Stability and Control of Uncertain Systems
- Renewable Energy and Sustainability
- Electric and Hybrid Vehicle Technologies
- Power Quality and Harmonics
- Islanding Detection in Power Systems
ZHAW Zurich University of Applied Sciences
2015-2024
University of Zurich
2012-2015
ABB (Switzerland)
2003-2012
Imperial College London
2007
General Electric (India)
2007
University of Duisburg-Essen
2000
This paper discusses the basic design and special applications of wide-area monitoring control systems, which complement classical protection systems Supervisory Control Data Acquisition/Energy Management System applications. Systemwide installed phasor measurement units send their measured data to a central computer, where snapshots dynamic system behavior are made available online. new quality information opens up wide range assess actively maintain system's stability in case voltage,...
This paper addresses online estimation of electromechanical oscillatory modes in power systems using dynamic data such as currents, voltages and angle differences measured on-line across transmission lines. These measurements are provided by newly installed phasor measurement units (PMUs). Here, the collected evaluated with main objective to detect dominant frequency damping oscillations during normal operation system. The goal is give operator qualitative quantitative information about...
In this paper, robust design and tuning of power system stabilizers is considered. A new approach presented that utilizes recently developed techniques based on linear matrix inequalities (LMIs) for mixed H/sub 2//H/sub /spl infin//-design under pole region constraints. Uncertainty about plant parameters - due to variations in generation load patterns expressed the form a fractional transformation, systematic procedure constructing uncertainty representation proposed. The easily carried out...
An application of a normalized H/sub /spl infin// loop-shaping technique for design and simplification damping controllers in the liner matrix inequalities (LMI) framework is illustrated this paper. The solution sought numerically using LMIs with additional pole-placement constraints. This ensures that time-domain specifications are met besides robust stabilization. designed control algorithm implemented rapid prototyping controller. performance controller validated real time detailed model...
This brief presents results on a robust linear quadratic Gaussian (LQG) damping control scheme for improving the inter-area mode oscillations of power systems. A technique is also proposed to guarantee minimum-phase/well-damped transmission zeros by appropriately "squaring" design plant, purposes efficient recovery. 7th-order multiple-input single-output (MISO) centralized controller designed 16-machine, 5-area system (138th order) reinforced with thyristor-controlled series capacitor (TCSC)...
Addresses model-based fuzzy control. A constructive and automated method for the design of a gain-scheduling controller is presented. Based on given Takagi-Sugeno model plant, designed such that stability prescribed performance closed loop are guaranteed. These properties valid in wide working range around an equilibrium without restrictions to slowly varying trajectories. The synthesis based linear matrix inequalities convex optimization techniques. If required, state estimator extended can...
This paper describes an adaptive tuning of parameters a power oscillation damping (POD) controller for FACTS devices. The devices considered here are the thyristor controlled series compensator (TCSC) and unified flow (UPFC). A residue method is applied to linearized system model determine best siting as well selection measured signals. Information available from higher control level, e.g. wide-area monitoring platform, used fine POD in case changing operating conditions.
Oscillations have been observed in power systems from the moment networks comprising multiple generators were interconnected order to provide more capacity and reliability. They are typically poorly damped, however, not dangerous as long they do become unstable. An algorithm for fast real-time detection stability assessment of dominant electromechanical oscillations utilising Kalman filtering techniques, is presented. First results its successful implementation on a recently developed...
A study is presented on power oscillation damping (POD) control using wide area measurements applied to a single static var compensator (SVC). An equivalent system model representing key characteristics of the Nordic used. Feedback signals from remote phasor measurement units (PMUs) in Norway and Finland are used damp critical inter-area modes through large SVC unit located south-east Norway. comparison between two design approaches: (i) model-based POD (MBPOD) – dependant accurate (ii)...
Static security assessment (SSA) is fundamental in electrical network analysis. However, the growing complexity and variability of grid's operating conditions can make it tedious, slow, computationally intensive, limited or impractical for on-line applications when traditional approaches are considered. Since this may hinder emerging analytical duties system operators, data-driven alternatives required faster sophisticated decision-making. Although different machine learning algorithms...
In this paper, a wide area monitoring system (WAMS) for the 420 kV Norwegian bulk transmission grid has been evaluated. The robustness of PMU measurements demonstrated by direct comparison phasor information from PMUs and state estimator (EMS). paper highlights benefits both off-line on-line WAMS applications: method real-time detection power oscillations, as well use input to stabilizers (PSS), is presented
Since 2005, Statnett (the Norwegian transmission system operator), ABB and Sintef Energy Research, have worked together on designing, implementing deploying a Wide Area Monitoring System (WAMS) completely integrated with Statnettpsilas SCADA system. This paper focuses the application for on-line monitoring of amplitude, frequency damping power oscillations as implemented in WAMS.The transfer capability Nordic is at times limited by risk instability due to inter- area oscillations. With WAMS...
Identification of coherent generators and the determination stability system condition in large interconnected power is one key steps to carry out different control strategies avoid a partial or complete blackout system. However, oscillatory trends, larger amount data available non-linear dynamic behaviour frequency measurements often mislead appropriate knowledge actual groups, making wide-area coherency monitoring challenging task. This paper presents novel online unsupervised mining...
Short-term electricity demand forecasting is one of the best ways to understand changing characteristics that helps make important decisions regarding load flow analysis, preventing imbalance in generation planning, management, and scheduling, all which are actions for reliability quality power system. The variation depends upon various parameters, such as effect temperature, social activities, holidays, working environment, so on. selection improper methods data can lead huge variations...
Nowadays, transmission system operators require higher degree of observability in real-time to gain situational awareness and improve the decision-making process guarantee a safe reliable operation. Digitalization energy systems allows utilities monitor dynamic performance at fast time scales. The use such technologies has unlocked new opportunities introduce data driven algorithms for improving stability assessment control system. Motivated by these challenges, group experts have worked...
Abstract This paper describes a design of power oscillation damping (POD) as an add-on feature for flow control. The developed controller has been applied to two FACTS devices: Thyristor Control Series Capacitor (TCSC) and Unified Power Flow Controller (UPFC). supplementary POD control is based on the residue method. Nonlineaz simulations show that proposed method can significantly improve dynamic performance system.
An important feature of an oscillation is the damping characterization. For a system, characteristic that occurs on its states or outputs gives information stability system. There are various techniques to compute ratio linear model but tools apply nonlinear systems scarce. In this paper, we utilize Hilbert transform and nonstationary oscillatory signals instantaneous signals. The technique applied computation power contain inter area oscillations. This for system monitoring.