Name: delta-wye source and load connections
Uploaded: 2024-07-08T13:19:57.000Z
Duration: 1 min 16 s
Channel: JoVE

Un sistema equilibrado de delta a Y cuenta con una fuente conectada en delta balanceada que alimenta una carga equilibrada conectada en Y.
En este circuito delta-Y, se supone que una secuencia abc positiva expresa los voltajes de fase, que también sirven como voltajes de línea de la fuente conectada en triángulo.
La ley de voltaje de Kirchhoff se puede aplicar a un bucle en el circuito para derivar una relación entre dos de las corrientes de línea.
Dado que se supone una secuencia positiva, estas corrientes de línea tienen una diferencia de fase de 120 grados, que se utiliza para determinar una de ellas.
Las otras dos corrientes de línea se obtienen utilizando la secuencia de fase positiva.
Las corrientes de fase del circuito delta-Y son aproximadamente iguales a las corrientes de línea.
Alternativamente, la fuente conectada en delta se puede reemplazar por su fuente conectada en Y equivalente.
El circuito Y-Y obtenido se analiza considerando un circuito monofásico equivalente y determinando las corrientes de tres líneas.
Este circuito también se puede transformar en un sistema delta-delta para fines de análisis, ya que a menudo se prefiere la carga conectada en delta debido a la facilidad de alterar las cargas individuales.

el circuito Δ a y

En el circuito triángulo-estrella, la fuente está conectada en triángulo, mientras que la carga está en una configuración de estrella. Esto significa que el voltaje de fase de la fuente conectada en triángulo es igual al voltaje de línea de la carga conectada en estrella. La conexión entre corrientes de dos líneas se origina en la fuente conectada en triángulo. La diferencia de fase en el sistema equilibrado permite calcular la corriente de una línea dada la otra, utilizando la secuencia positiva de fases. En el sistema triángulo-estrella, las corrientes de fase en la carga conectada en estrella son directamente iguales a las corrientes de línea de la fuente triángulo, debido a que la configuración en estrella de la carga simplifica el flujo desde la fuente triángulo. La relación entre las corrientes de línea y de fase en una configuración en estrella muestra que la corriente de fase en la carga conectada en estrella es igual a la corriente de línea de la fuente conectada en triángulo.
Otra forma de obtener las corrientes de línea es reemplazar la fuente conectada en triángulo por su fuente equivalente conectada en estrella. Los voltajes línea a línea de una fuente conectada en estrella se adelantan a sus voltajes de fase correspondientes en 30 grados. Esto significa que cada voltaje de fase de la fuente equivalente conectada en estrella se obtiene dividiendo el voltaje de línea correspondiente de la fuente conectada en triángulo por la raíz cuadrada de tres y cambiando su fase en -30 grados. Como resultado, la fuente equivalente conectada en estrella tiene voltajes de fase desplazados 120 grados en consecuencia.
Al convertir una configuración triángulo a una configuración en estrella, el sistema puede lograr una mejor regulación de voltaje y permitir el uso de un cable neutro. Este cable neutro permite la conexión a tierra del sistema, mejorando la seguridad y la estabilidad.
La configuración equilibrada triángulo a triángulo se utiliza para transmitir electricidad a largas distancias, donde los niveles de alto voltaje deben reducirse a niveles utilizables para uso industrial, comercial y residencial.

El circuito Δ a Y

Un sistema equilibrado de delta a Y cuenta con una fuente conectada en delta balanceada que alimenta una carga equilibrada conectada en Y.
En este circuito delta-Y, un abc ...

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The Delta-to-Y Circuit

delta-wye source and load connections

A balanced delta-wye circuit connects a delta-connected source to a wye-connected load. In this setup, the phase voltage of the delta source equals the line voltage of the wye load. The source also sets the line currents that flow into the load.

For a balanced system, the phase difference between currents makes it possible to find one line current from the other by using the positive sequence of phases. In the wye-connected load, each phase current equals the line current from the delta source. That relationship makes current analysis simpler in the load section.

The line currents can also be found by replacing the delta source with an equivalent wye source. In that conversion, each phase voltage is the matching line voltage divided by the square root of three and shifted by -30 degrees. The line-to-line voltages of a wye source lead the phase voltages by 30 degrees, so the equivalent wye source keeps the phases spaced 120 degrees apart.

Changing a delta connection to a star, or wye, connection can improve voltage regulation. It also allows the use of a neutral wire. That neutral wire supports grounding, which improves safety and stability. Balanced delta systems are also used for long-distance power transmission, where high voltage must later be stepped down for industrial, commercial, and residential use.

Delta-Wye Source and Load Connections

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A balanced delta-wye circuit connects a delta-connected source to a wye-connected load. In this setup, the phase voltage of the delta source equals the line voltage of the wye load. The source also sets the line currents that flow into the load. For a balanced system, the phase difference between currents makes it possible to find one line current from the other by using the positive sequence of phases. In the wye-connected load, each phase current equals the line current from the delta source.

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Learn how a balanced delta source powers a wye load, how line and phase currents relate, and how a delta source can be converted to an equivalent wye source.

Delta-Wye Source and Load Connections | JoVE K12

JoVE Core Electrical Engineering offers easy-to-understand animated videos that cover fundamental concepts of electric circuits along with circuit analysis techniques. It incorporates first-order and second-order circuits using operational amplifiers and circuit transformation concepts. The inclusion of practical design examples and real-world applications through scientist-in-action videos adds significant educational value, making complex concepts accessible.

electrical engineering

Delta-Wye Source and Load Connections

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