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Positive Sequence Voltage LG consists of balanced three-phase voltage and current phasors which are exactly at 120 degrees apart rotating counterclockwise in ABC rotation. Check FAQs
V1(lg)=Ea(lg)⋅(Z0(lg)+Z2(lg))Z0(lg)+Z1(lg)+Z2(lg)
V1(lg) - Positive Sequence Voltage LG?Ea(lg) - A Phase EMF LG?Z0(lg) - Zero Sequence Impedance LG?Z2(lg) - Negative Sequence Impedance LG?Z1(lg) - Positive Sequence Impedance LG?

Positive Sequence Voltage using A-Phase EMF and Sequence Impedances(LGF) Example

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Here is how the Positive Sequence Voltage using A-Phase EMF and Sequence Impedances(LGF) equation looks like with Values.

Here is how the Positive Sequence Voltage using A-Phase EMF and Sequence Impedances(LGF) equation looks like with Units.

Here is how the Positive Sequence Voltage using A-Phase EMF and Sequence Impedances(LGF) equation looks like.

37.5195Edit=29.38Edit⋅(8Edit+-44.6Edit)8Edit+7.94Edit+-44.6Edit
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HomeIcon Home » Category Engineering » Category Electrical » Category Power System » fx Positive Sequence Voltage using A-Phase EMF and Sequence Impedances(LGF)

Positive Sequence Voltage using A-Phase EMF and Sequence Impedances(LGF) Solution

Follow our step by step solution on how to calculate Positive Sequence Voltage using A-Phase EMF and Sequence Impedances(LGF)?

FIRST Step Consider the formula
V1(lg)=Ea(lg)⋅(Z0(lg)+Z2(lg))Z0(lg)+Z1(lg)+Z2(lg)
Next Step Substitute values of Variables
∴ V1(lg)=29.38V⋅(8Ω+-44.6Ω)8Ω+7.94Ω+-44.6Ω
Next Step Prepare to Evaluate
∴ V1(lg)=29.38⋅(8+-44.6)8+7.94+-44.6
Next Step Evaluate
∴V1(lg)=37.5194696441033V
LAST Step Rounding Answer
∴V1(lg)=37.5195V

Positive Sequence Voltage using A-Phase EMF and Sequence Impedances(LGF) Formula Elements

Variables
Positive Sequence Voltage LG
Positive Sequence Voltage LG consists of balanced three-phase voltage and current phasors which are exactly at 120 degrees apart rotating counterclockwise in ABC rotation.
Symbol: V1(lg)
Measurement: Electric PotentialUnit: V
Note: Value should be greater than 0.
Formulas to find Positive Sequence Voltage LGOpen Variable
A Phase EMF LG
A phase EMF LG is defined as the electromagnetic force of the a-phase in open conductor fault.
Symbol: Ea(lg)
Measurement: Electric PotentialUnit: V
Note: Value can be positive or negative.
Formulas to find A Phase EMF LGOpen Variable
Zero Sequence Impedance LG
Zero Sequence Impedance LG consists of a balanced three-phase voltage and current, phasors of which all have the same phase angles and rotate counter clockwise together.
Symbol: Z0(lg)
Measurement: Electric ResistanceUnit: Ω
Note: Value can be positive or negative.
Formulas to find Zero Sequence Impedance LGOpen Variable
Negative Sequence Impedance LG
Negative Sequence Impedance LG consists of balanced three-phase impedance phasors which are exactly at 120 degrees apart rotating counterclockwise in ACB rotation.
Symbol: Z2(lg)
Measurement: Electric ResistanceUnit: Ω
Note: Value can be positive or negative.
Formulas to find Negative Sequence Impedance LGOpen Variable
Positive Sequence Impedance LG
Positive Sequence Impedance LG consists of balanced three-phase voltage and current phasors which are exactly at 120 degrees apart rotating counterclockwise in ABC rotation.
Symbol: Z1(lg)
Measurement: Electric ResistanceUnit: Ω
Note: Value should be greater than 0.
Formulas to find Positive Sequence Impedance LGOpen Variable

Other Formulas to find Positive Sequence Voltage LG

​Go Positive Sequence Voltage for L-G-F
V1(lg)=E1(lg)-(Z1(lg)⋅I1(lg))
​Go Positive Sequence Voltage using Positive Sequence Current
V1(lg)=3⋅Zf(lg)⋅I1(lg)

Other formulas in Voltage and EMF category

​Go Zero Sequence Voltage using A-Phase Current (LGF)
V0(lg)=(Zf(lg)⋅Ia(lg))-(V2(lg))-(V1(lg))
​Go A-Phase Voltage(LGF)
Va(lg)=Zf(lg)⋅Ia(lg)
​Go Zero Sequence Voltage for LGF
V0(lg)=-Z0(lg)⋅I0(lg)
​Go A-Phase EMF using Positive Sequence Voltage (LGF)
Ea(lg)=V1(lg)+(Z1(lg)⋅I1(lg))

How to Evaluate Positive Sequence Voltage using A-Phase EMF and Sequence Impedances(LGF)?

Positive Sequence Voltage using A-Phase EMF and Sequence Impedances(LGF) evaluator uses Positive Sequence Voltage LG = (A Phase EMF LG*(Zero Sequence Impedance LG+Negative Sequence Impedance LG))/(Zero Sequence Impedance LG+Positive Sequence Impedance LG+Negative Sequence Impedance LG) to evaluate the Positive Sequence Voltage LG, The Positive Sequence Voltage using a-Phase EMF and Sequence Impedances(LGF) formula consists of balanced three-phase voltage and current phasors which are exactly at 120 degrees apart rotating counterclockwise in ACB rotation. Positive Sequence Voltage LG is denoted by V1(lg) symbol.

How to evaluate Positive Sequence Voltage using A-Phase EMF and Sequence Impedances(LGF) using this online evaluator? To use this online evaluator for Positive Sequence Voltage using A-Phase EMF and Sequence Impedances(LGF), enter A Phase EMF LG (Ea(lg)), Zero Sequence Impedance LG (Z0(lg)), Negative Sequence Impedance LG (Z2(lg)) & Positive Sequence Impedance LG (Z1(lg)) and hit the calculate button.

FAQs on Positive Sequence Voltage using A-Phase EMF and Sequence Impedances(LGF)

What is the formula to find Positive Sequence Voltage using A-Phase EMF and Sequence Impedances(LGF)?
The formula of Positive Sequence Voltage using A-Phase EMF and Sequence Impedances(LGF) is expressed as Positive Sequence Voltage LG = (A Phase EMF LG*(Zero Sequence Impedance LG+Negative Sequence Impedance LG))/(Zero Sequence Impedance LG+Positive Sequence Impedance LG+Negative Sequence Impedance LG). Here is an example- 37.51947 = (29.38*(8+(-44.6)))/(8+7.94+(-44.6)).
How to calculate Positive Sequence Voltage using A-Phase EMF and Sequence Impedances(LGF)?
With A Phase EMF LG (Ea(lg)), Zero Sequence Impedance LG (Z0(lg)), Negative Sequence Impedance LG (Z2(lg)) & Positive Sequence Impedance LG (Z1(lg)) we can find Positive Sequence Voltage using A-Phase EMF and Sequence Impedances(LGF) using the formula - Positive Sequence Voltage LG = (A Phase EMF LG*(Zero Sequence Impedance LG+Negative Sequence Impedance LG))/(Zero Sequence Impedance LG+Positive Sequence Impedance LG+Negative Sequence Impedance LG).
What are the other ways to Calculate Positive Sequence Voltage LG?
Here are the different ways to Calculate Positive Sequence Voltage LG-
  • Positive Sequence Voltage LG=EMF Induced in Primary Winding LG-(Positive Sequence Impedance LG*Positive Sequence Current LG)OpenImg
  • Positive Sequence Voltage LG=3*Fault Impedance LG*Positive Sequence Current LGOpenImg
Can the Positive Sequence Voltage using A-Phase EMF and Sequence Impedances(LGF) be negative?
No, the Positive Sequence Voltage using A-Phase EMF and Sequence Impedances(LGF), measured in Electric Potential cannot be negative.
Which unit is used to measure Positive Sequence Voltage using A-Phase EMF and Sequence Impedances(LGF)?
Positive Sequence Voltage using A-Phase EMF and Sequence Impedances(LGF) is usually measured using the Volt[V] for Electric Potential. Millivolt[V], Microvolt[V], Nanovolt[V] are the few other units in which Positive Sequence Voltage using A-Phase EMF and Sequence Impedances(LGF) can be measured.
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