del sistema de turbina-generador instalado. Producción. Nuestro centro de producción (Orléans, Francia) está equipado con máquinas de tecnología punta. Los generadores síncronos constituyen el equipo más costoso en un sistema de potencia. Como consecuencia de los posibles fallos que se presentan tanto. CONTROL DE FRECUENCIA EN GENERADORES SÍNCRONOS Carol Sánchez Mateo Rodríguez Fredy Salazar Luz Dary Garcia Universidad.
|Published (Last):||2 May 2005|
|PDF File Size:||20.16 Mb|
|ePub File Size:||1.88 Mb|
|Price:||Free* [*Free Regsitration Required]|
Figure 12 Equivalent circuit used to find Vt and Vn. Finally, this work may help to develop useful protective devices which detect ground faults at the synchronous generator stator windings. Methodology Method of third harmonic This method uses a comparison of the third order component of the voltage measured at the synchronous generator terminal Vt or at the neutral Vn connections.
This corresponds to a proposed improvement of the classical voltage threshold alternatives.
Select a Web Site
The first model is the equivalent scheme of the system under normal condition operation while the second one is equivalent to the system working under fault conditions. Voltage Va is obtained as it is presented in Using the classical thresholds strategy to determine the maximum fault resistance to be detected in the case of the undervoltage scheme, different fault situations were analyzed using the circuit presented in figure Figure 4 Protective scheme used to detect under voltage of the third harmonic.
This harmonic magnitude varies according to the load level, the measurement point and the fault location along the winding. Such devices have to be installed together to the classical ground fault protection for covering all of the stator winding. To obtain the proposed comparison, a real generator machine is used in tests and these parameters are the presented in table 1. Figure 5 Protective scheme using over voltage of the third harmonic.
EST3 – Generadores síncronos estáticos – Google Patents
Overvoltage of the third harmonic component Scheme 2 This scheme is based on the measurement of the third harmonic of voltage at the terminal connection of the generator, see figure 5. In the case of the scheme 3 ratio of the third harmonicthe relation presented in equations 12 and 3 were tested, as it is present in figure 15 as scheme 3 1scheme 3 2 and Scheme 3 3respectively.
The results help to validate the system behavior by a comparison of the values obtained for the third harmonic voltage measured at the ground connection Vn and these measured at the machine terminals Vt with those obtained by using equations 6714 and 15 considering the real machine parameters given by table 1.
The normal operating intervals for the third harmonic voltage measured at the neutral is [ Modulation and control of three-phase paralleled Z-source inverters for distributed generation beneradores. Theoretical analysis for genreadores non fault model The equivalent circuit developed for non fault conditions is presented in figure 7.
How to cite this article.
CONTROL DE FRECUENCIA EN GENERADORES SÍNCRONOS by Juan Camilo Valderrama on Prezi
Then, the main results and a comparative analysis are presented, and finally the main conclusions are presented. In the case of the overvoltage of the third harmonic scheme 2there is not possible to detect any ground fault because the overlapping of the normal operation range values of the third generadorse and those values measured in case of faults.
However, the value of the third harmonic at terminal is different from zero as it is shown in figure 2. Revista Tecnura – U.
Figure 6 Protective scheme of third harmonic voltage using the ratio method. All of sincroos possible variations of the third harmonic voltage due to changes on the connected load and errors in the meters are considered for this analysis. Finally, the alarm-trip logic proposed helps to deal with the variation in the magnitude of the third generadres of voltage caused by load changes as it is presented in figures 2 sinncronos, 3 and Validation of the proposed third harmonic generator models.
This scheme is based on the measurement of the third harmonic of voltage at the terminal connection of the generator, see figure 5.
Figure 4 Protective scheme used to detect under voltage of the third harmonic Figure 5 Protective scheme using over voltage of the third harmonic Ratio of the third harmonic components Scheme 3 Sincronoss method is based on the comparison of third harmonic voltages using several mathematic relations which should make the protective device more susceptible to the variation of these voltages.
Figure 2 Magnitude of the third harmonic at the stator winding considering generzdores ground fault in the neutral Figure 3 Magnitude of the generwdores harmonic at the stator winding considering a ground fault in terminals Undervoltage of the third harmonic component Scheme 1 This scheme is based on the measurement of the third harmonic component of voltage at the neutral connection of the synchronous generator, as presented in figure 4.
System and method for attenuating noise associated with a back electromotive force signal in a motor.
Method and system for rapid modeling and verification of excitation systems for synchronous generators. This method is based on the comparison of third harmonic voltages using several mathematic relations which should make the protective device more susceptible to the variation of these voltages.
The equivalent circuit developed to consider under faulted conditions is presented in figure Verfahren und Schaltungsanordnung zur sensorlosen, elektrischen Rotorlagemessung einer permanent erregten Synchronmaschine. However, the ratio based scheme helps to obtain the sincrlnos performance in high impedance fault determination.
Ciudad Universitaria Calle 67 No. From the proposed equivalent, voltages at the neutral Vn and terminal Vt under fault conditions are obtained as it is presented in 14 and Genefadores, the admittances Y 1 and Y 2 have the same meaning. In the proposed test system, the normal operating ranges were determined for both the third harmonic of voltage at the neutral Vn and at the terminals Vtby varying the load from zero to the nominal value.
Considering a ground fault at the neutral connection, the third harmonic at this node decreases to zero. English pdf Article in xml format Article references How to cite this article Automatic translation Send this article by e-mail. Solving circuit proposed in figure 9equations 6 and 7 are then obtained for the voltage at the neutral and terminals, respectively.