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Summary form only given. Recently, renewable wind energy is enjoying a rapid growth globally to become an important green electricity source to replace polluting and exhausting fossil fuel. However, with wind being an uncontrollable resource and the nature of distributed wind induction generators, integrating a large-scale wind-farm into a power system poses challenges, particularly in a weak power...
Summary form only given. This paper presents a novel nonlinear optimal controller for a static compensator (STATCOM) connected to a power system, using artificial neural networks and fuzzy logic. The action dependent heuristic dynamic programming (ADHDP), a member of the adaptive critic designs (ACD) family, is used for the design of the STATCOM neuro-fuzzy controller. This neuro-fuzzy controller...
This paper presents a space vector modulation (SVM) based switching strategy for a three-level neutral point clamped (NPC) converter that is adapted as a STATCOM. The main feature of the proposed SVM switching strategy is that it enables balancing voltages of the DC capacitors, with no requirement of additional controls or auxiliary devices. The proposed SVM strategy also improves the STATCOM AC-side...
This paper deals with a new HVDC interaction which was observed in the Jeju-Haenam HVDC system. The interaction is not from a system malfunction or controller loop problem but from the change of AC network scheme and the network operating condition. We have found that the interaction is caused by the voltage oscillation between the synchronous compensator and HVDC shunt reactor. We analyzed the cause...
In today's utility environment, financial and market forces are, and will continue to, demand a more optimal and profitable operation of the power system. Now, more than ever, advanced technologies are needed for the reliable and secure operation of power systems. To achieve both operational reliability and financial profitability, it has become clear that more efficient utilization and control of...
A unique solar technology is entering the competitive utility-scale power plant market. This solar dish-Stirling technology combines a mirrored concentrator dish with a high-efficiency Stirling engine specially designed to convert sunlight to electricity. In the next a few years, two large-scale power plants will be constructed in California using this innovative technology with a potential total...
This paper describes an IEEE Special Publication. It was prepared for a Panel session on power system planning and FACTS applications. The special publication discusses system planning issues and requirements for applications of FACTS controllers into electric transmission networks. It lists applications and discusses differences between traditional equipment and FACTS controllers. Characteristics...
The proposed voltage source converter is composed of a series double bridge converter with an auxiliary circuit. The auxiliary circuit injects DC voltage via the mid point of the double bridge converter. The injection ratio and frequency are chosen to convert the standard 12-pulse into 60-pulse configuration without PWM or increasing the number of bridges, thus the voltage and current harmonic can...
The problem of finding out which positions are the most effective and how many flexible AC transmission system (FACTS) devices have to be installed and controlled in a deregulated environment on economic basis is a question of great significance for the dispatcher. This paper presents a flexible approach based in practical reasoning rules from fuzzy logic theory capable of governing multiple static...
In this paper a nonlinear multi-objective optimization problem is formulated to maximize social welfare and the maximum distance to collapse point in an open power market using reactive support like static VAr compensator (SVC). The production and consumption costs of reactive power are included in the multi-objective OPF which are intended to provide proper market signals to the electricity market...
Time and space harmonics can cause variations on synchronous generator steady state operating conditions and the small-signal stability of power system. Static synchronous series compensator (SSSC) is a FACTS device which is widely used in transmission lines. In this paper eigen-value analysis method is used to investigate the impact of time and space harmonics on small signal stability of single...
It has been reported that the simplest and most practical mode of operation of a unified power flow controller (UPFC) is the perpendicular voltage control mode. This paper investigates the improvement of transient stability limit of a simple power system with the help of a UPFC operated in perpendicular voltage control mode. All the equations required for this purpose are systematically derived. The...
This paper analyzes both dynamic and steady-state characteristics of a commercial wind power generation system (WPGS) containing four wind-turbine induction generators (WTIGs) connected to a utility grid using Matlab/Simulink. The simulated power-flow results are validated by comparing with the field measured results of the studied WPGS. Various steady-state results of the studied WPGS under different...
This paper is aimed to the control of the voltage magnitude of a static synchronous compensator (STATCOM's) prototype at lab-scale. This is based on the pulse width modulation (PWM) technique. A B-Spline neural network (B-SNN) control strategy is proposed for such purposes, and has been selected due to its robustness, simple structure, adaptability, and fast response. This neuro-controller possesses...
As NASA readies itself for new space exploration initiatives starting with a human return to the Moon by the year 2020 eventually leading to human exploration of Mars, the requirements for a safe and reliable power system will become important issues. A preliminary study of a proposed hybrid AC/DC distribution system with a power electronic interface is investigated. A static synchronous compensator...
The paper proposes a control scheme to mitigate inter area oscillations in large power systems. Our control strategy consists of an online determination of critical oscillation's frequency and phase, and a synthesis of the modulation signal for a SVC that uses a bang-bang controller. The algorithm to determine the controller's exact switching times is provided. Simulation results show that the controller's...
This paper presents practical solutions to mitigate the adverse effects on distance protection schemes when they are used to protect transmission networks that are compensated by shunt connected flexible AC transmission system (FACTS) controllers/devices. Two types of shunt-FACTS devices, static var compensator (SVC) and static synchronous compensator (STATCOM), are considered and designed to regulate...
This paper discusses the results of preliminary studies conducted to evaluate the potential for application of static VAR compensators (SVCs) and thryristor controlled series capacitors (TCSCs) on the Mexican interconnected system. The work synthesizes the progress in a research effort to study means to remove power transfer limitations in the 400/230 kV transmission system. The study compares the...
This paper explores the inclusion of dynamic reactive power devices such as synchronous condensers, static VAr compensators (SVC), static synchronous compensators (STATCOM), and other flexible AC transmission system (FACTS) controllers, in a restructured setting. The operators of such devices may need to offer reactive power at a cost to be adequately compensated. It is assumed in this paper that...
This paper proposes an active current shaper for a 12-pulse thyristor converter, termed a load compensator (LSTATCOM). The LSTATCOM injects compensation current through a split winding interphase reactor connected on DC bus of the 12-pulse AC-DC converter. It is desired that the LSTATCOM provides sinusoidal shaping of the source currents for variations in the output load as well as changes in the...
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