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EPE 2009 - Subtopic 08-4 - DS: 'Measurement and Estimation Techniques (in power electronic systems and drives) (II)'
You are here: EPE Documents > 01 - EPE & EPE ECCE Conference Proceedings > EPE 2009 - Conference > EPE 2009 - Topic 08: 'Measurements and Sensors' > EPE 2009 - Subtopic 08-4 - DS: 'Measurement and Estimation Techniques (in power electronic systems and drives) (II)'
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	A Signal-Based Approach for Detection and Isolation of Current Sensor Faults in Induction Motors   By Manuel Ricardo GÁLVEZ CARRILLO, Michel KINNAERT	[View]   [Download]
Abstract: Incipient fault detection and isolation (FDI) in the current sensors of a controlled induction motor is addressed by an original diagnosis system based exclusively on the three-phase signals model. In this way we avoid a reduction in the performance of the FDI system due to the uncertainty in the machine model. Assuming that the three current signals are measured, the proposed FDI system is made of a combination of Kalman filters and statistical change detection and isolation algorithms (CUSUM or Cumulative Sum). The approach is validated by a closed-loop simulation using a squirrel cage induction motor. The latter is controlled by a linear quadratic regulator combined with an extended Kalman filter.
	Development of Inspection Robot System for Live-line Suspension Insulator Strings in 345kV Power Transmission Lines   By Joon-Young PARK, Jae-Kyung LEE, Byung-Hak CHO, Ki-Yong OH	[View]   [Download]
Abstract: A new inspection robot system is presented for live-line suspension insulator strings to prevent an insulator failure that can have severe effects on national industry, economy and security. This robot system is small-sized, lightweight and more superior in insulation and reliability by adopting a new wheel-leg moving mechanism and a new insulation resistance measurement method. We confirmed its effectiveness through experiments including a live-line test.
	Development of Inspection Tool for Live-line Insulator Strings in 154kV Power Transmission Lines   By Jae-Kyung LEE, Joon-Young PARK, Byung-Hak CHO, Ki-Yong OH	[View]   [Download]
Abstract: The insulators in power transmission lines should be inspected periodically to prevent power failure. By measuring their insulation resistance and distribution voltage with a high resistance resistor at each probe, the developed inspection tool can reliably and safely detect faulty insulators in an insulator string. We confirmed its effectiveness through live-line performance tests.
	FPGA design of a Robust Phase Locked Loop Algorithm for a Three Phase PWM Grid Connected Converter   By Mouna BEJAOUI, Ilhem SLAMA-BELKHODJA, Eric MONMASSON, Bogdan MARINESCU, Lotfi CHARAABI	[View]   [Download]
Abstract: The FPGA-design of a so-called rPLL for grid-connected renewable energy systems is developed. The design methodology leads to reduced consumed resources and time execution (1.14 µs with an XC3s400 FPGA device from Xilinx). Experimental results under healthy and faulty grid conditions illustrate the design effectiveness.
	FPGA Implementation of Harmonics Detection Methods using Neural Networks    By Serge Raoul DZONDE NAOUSSI, Hervé BERVILLER, Jean-Philippe BLONDE, Charles Hubert KOM, Martin KOM, Francis BRAUN	[View]   [Download]
Abstract: This work presents a Neural Networks based intelligent Active Power Filter control unit for harmonics current elimination. The paper is centered on an Improved Three-Monophase (ITM) method and a novel one called Two-Phase Flow (TPF) method for detecting harmonics from disturbed currents due to non linear loads in electric power systems. The TPF method introduces new currents decomposition in the DQ-space that results in separating AC from DC components. The DC terms are estimated by an Adaline Neural Network because of its learning capabilities with respect to real-time applications. Then the resulting AC terms from this approach are transformed to obtain the reference currents. After analyzing those two methods with respect to their performance and hardware resources consumption by means of Altera Dsp Builder®, a comparative study with the direct method is reported and some FPGA implementation results are also shown. From there, one can notice that the direct method is the simplest and offers the best performance whereas the TPF is the fastest and consumes less material resources.
	FPGA-Based Sensorless Controller for Synchronous Machine using an Extended Kalman Filter    By Lahoucine IDKHAJINE, Eric MONMASSON, Amira MAALOUF	[View]   [Download]
Abstract: This paper presents a Field Programmable Gate Array (FPGA) based Sensorless current controller for a Salient Synchronous Machine (SSM). The implemented algorithm uses an Extended Kalman Filter (EKF) to estimate the rotor position. The used FPGA design methodology has been presented including functional simulations, development of the FPGA architecture and hardware in the loop tests. Some experimental results are provided so as to illustrate the efficiency and the interest of using FPGAs in such Sensorless application.
	Low-cost Three-phase Load Protector Using FPGA   By Gerardo CEGLIA, Ender LEONES, Victor GUZMAN, Maribel GIMENEZ , Julio WALTER	[View]   [Download]
Abstract: This work presents a versatile and low cost prototype of a three-phase load protector circuit, controlled using a FPGA, which allows load protection against over-voltage, under-voltage, line unbalance and phase loss and loss of phase sequence. Load is connected using an electromechanical contactor. The prototype circuit was tested in the laboratory with good results.
	ON LINE PARAMETER ESTIMATION OF ELECTRIC SYSTEMS USING THE BACTERIAL FORAGING ALGORITHM   By Gabriel NORIEGA, José RESTREPO, Víctor Manuel GUZMÁN ARGUIS, María Isabel GIMÉNEZ, José Manuel ALLER	[View]   [Download]
Abstract: In this work the “Bacterial Foraging” strategy is used to identify in real time a three-phase load. The optimization process uses the instantaneous current and voltage values as inputs, and estimates the values of the resistive and inductive parameters in the system. Simulations are used to verify the proposed strategy
	Online Monitoring Method and Electrical Parameter Ageing Laws of Aluminium Electrolytic Capacitors Used in UPS   By Karim ABDENNADHER, Pascal VENET, Gérard ROJAT, Jean-Marie RETIF, Christophe ROSSET	[View]   [Download]
Abstract: This paper presents a work used for a low cost method to create a real time condition monitoring and a predictive maintenance system of an electrolytic capacitor in Uninterrupted Power Supplies (UPS). It consists of evaluating the evolution laws for equivalent series resistance (ESR) and the capacitance C values of the electrolytic capacitors versus operating time. Experimental results of parameter evolutions and the law estimations are presented. The laws funded are used in UPS where waveforms are continuously varying in amplitude, frequency and versus temperature. The estimated laws are used for the on line failure prediction method which has the merits of using only the existent resources in UPS.
	Real time parameter and models determination in saturated inductors submitted to non-sinusoidal excitations   By Ramon BARGALLO, Guillermo VELASCO, Alfonso CONESA, Manuel ROMAN	[View]   [Download]
Abstract: Parameter’s determination on saturated systems is a complex task. Sometimes you can determine these parameters by calculation but building errors must be checked to verify the final values of them. In this paper we describe a recursive algorithm to calculate the parameters for different models of an inductor in real time and buried in a generic measurement system made to test three phase inductors.
	Sliding Mode Flux Observer and Rotor Speed Estimation for DTC-Controlled Induction Motor Drive   By Zdenek SUTNAR, Zdenek PEROUTKA, Miran RODIC	[View]   [Download]
Abstract: This contribution deals with design of sliding mode based stator flux observer for direct torque and flux controlled induction machine drives. Proposed flux observer is completed by simple estimation of rotor speed in order to achieve a sensorless drive control. Proper function of presented sensorless control is verified by both simulations and experiments made on designed laboratory prototype of induction machine drive of rated power of 250W.
	Synchronization Techniques Comparison for Sensorless Control applied to Wind Energy Conversion Systems (WECS)   By Luis GONZALEZ	[View]   [Download]
Abstract: This paper encompasses a comparative study of techniques for position and speed estimation applied to Wind Energy Conversion Systems (WECS), connected to a distribution grid by means of a back to back converter. In the context of low and medium power wind energy conversion systems, the robustness of several sensorless techniques are studied taking into account the tolerance of the PMSG parameters.