Enum TransformerConnection 

pub enum TransformerConnection {
    WyeGWyeG,
    WyeGDelta,
    DeltaWyeG,
    DeltaDelta,
    WyeGWye,
}

Zero-sequence winding connection type for transformers.

Determines how zero-sequence current propagates (or is blocked) through a transformer. Standard ANSI/IEEE notation: G = grounded neutral.

Zero-sequence rules (IEC 60909 / IEEE Std 1110)

Connection	Zero-sequence path
WyeGWyeG	Passes freely through transformer (both sides grounded)
WyeGDelta	Blocked on delta (secondary) side; grounded-wye primary sees zero-seq
DeltaWyeG	Blocked on delta (primary) side; grounded-wye secondary sees zero-seq
DeltaDelta	Blocked completely — no zero-sequence path through the transformer
WyeGWye	Blocked — ungrounded wye presents no zero-seq return path

Variants

WyeGWyeG

Both sides grounded wye — passes zero-sequence freely (default).

Use for transformers where both neutrals are solidly grounded. Zero-sequence admittance is modeled identically to positive-sequence.

WyeGDelta

Primary grounded wye, secondary delta — blocks zero-sequence on secondary.

The grounded-wye primary can carry zero-sequence current, but the delta secondary circulates it internally (no path to the secondary bus). In the zero-sequence Y-bus, only the primary-side shunt admittance appears as a self-admittance at the primary bus; the off-diagonal entries are zero.

DeltaWyeG

Primary delta, secondary grounded wye — blocks zero-sequence on primary.

Symmetric to WyeGDelta: the grounded-wye secondary bus sees a shunt to ground but no coupling to the primary bus in the zero-sequence network.

DeltaDelta

Both sides delta — blocks zero-sequence completely.

No zero-sequence current can pass through or terminate at either winding. The transformer is omitted entirely from the zero-sequence Y-bus.

WyeGWye

Grounded wye, ungrounded wye — blocks zero-sequence.

The ungrounded wye presents no return path for zero-sequence current. Treated the same as DeltaDelta in the zero-sequence network.

Trait Implementations

impl Clone for TransformerConnection

fn clone(&self) -> TransformerConnection

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Debug for TransformerConnection

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl Default for TransformerConnection

fn default() -> TransformerConnection

Returns the “default value” for a type.

impl<'de> Deserialize<'de> for TransformerConnection

fn deserialize<__D>(__deserializer: __D) -> Result<Self, __D::Error>

where __D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer.

impl PartialEq for TransformerConnection

fn eq(&self, other: &TransformerConnection) -> bool

Tests for self and other values to be equal, and is used by ==.

fn ne(&self, other: &Rhs) -> bool

Tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.

impl Serialize for TransformerConnection

fn serialize<__S>(&self, __serializer: __S) -> Result<__S::Ok, __S::Error>

where __S: Serializer,

Serialize this value into the given Serde serializer.

impl Copy for TransformerConnection

impl StructuralPartialEq for TransformerConnection