Introduction

The multiphase line can represent either a 1, 2, or 3-phase line. The impedance parameters of these lines can be presented as positive and zero sequence data or with full matrices. Note that to model the 1 or 2-phase line, only the full matrix presentation is acceptable. Thus, there are four types of multiphase line components in ePHASORSIM native library.

Single Phase Line
Two Phase Line
Three Phase Line with Full Data
Three Phase Line with Sequential Data

Single Phase Line

Symbol	Description	Unit
ID	Line name	a unique name
Status	Connect/Disconnect status	Initial value 1 (0 for disconnected)
Length	Length of the line (non-zero)	Any unit
From1	First sending bus	a unique name
To1	First receiving bus	a unique name
r11 (Ohm/length_unit)	see (*)	ohm/length_unit
x11 (Ohm/length_unit)	see (*)	ohm/length_unit
b11 (uS/length_unit)	see (**)	uS/length_unit

Two Phase Line

Symbol	Description	Unit
ID	Line name	a unique name
Status	Connect/Disconnect status	Initial value 1 (0 for disconnected)
Length	Length of the line (non-zero)	Any unit
From1	First sending bus	a unique name
From2	Second sending bus
To1	First receiving bus
To2	Second receiving bus
r11 (Ohm/length_unit)	see (*)	ohm/length_unit
x11 (Ohm/length_unit)	see (*)
r21 (Ohm/length_unit)	see (*)
x21 (Ohm/length_unit)	see (*)
r22 (Ohm/length_unit)	see (*)
x22 (Ohm/length_unit)	see (*)
b11 (uS/length_unit)	see (**)	uS/length_unit
b21 (uS/length_unit)	see (**)
b22 (uS/length_unit)	see (**)

Three Phase Line With Full Data

Symbol	Description	Unit
ID	Line name	a unique name
Status	Connect/Disconnect status	Initial value 1 (0 for disconnected)
Length	Length of the line (non-zero)	Any unit
From1	First sending bus	a unique name
From2	Second sending bus
From3	Third sending bus
To1	First receiving bus
To2	Second receiving bus
To3	Third receiving bus
r11 (Ohm/length_unit)	see (*)	ohm/length_unit
x11 (Ohm/length_unit)	see (*)
r21 (Ohm/length_unit)	see (*)
x21 (Ohm/length_unit)	see (*)
r22 (Ohm/length_unit)	see (*)
x22 (Ohm/length_unit)	see (*)
r31 (Ohm/length_unit)	see (*)
x31 (Ohm/length_unit)	see (*)
r32 (Ohm/length_unit)	see (*)
x32 (Ohm/length_unit)	see (*)
r33 (Ohm/length_unit)	see (*)
x33 (Ohm/length_unit)	see (*)
b11 (uS/length_unit)	see (**)	uS/length_unit
b21 (uS/length_unit)	see (**)
b22 (uS/length_unit)	see (**)
b31 (uS/length_unit)	see (**)
b32 (uS/length_unit)	see (**)
b33 (uS/length_unit)	see (**)

Three Phase Line With Sequential Data

Symbol	Description	Unit
ID	Line name	a unique name
Status	Connect/Disconnect status	Initial value 1 (0 for disconnected)
Length	Length of the line (non-zero)	Any unit
From1	First sending bus	a unique name
From2	Second sending bus
From3	Third sending bus
To1	First receiving bus
To2	Second receiving bus
To3	Third receiving bus
R0 (Ohm/length_unit)	Zero-sequence resistance, see (x)	ohm/length_unit
X0 (Ohm/length_unit)	Zero-sequence reactance, see (x)
R1 (Ohm/length_unit)	Positive-sequence resistance, see (x)
X1 (Ohm/length_unit)	Positive-sequence reactance, see (x)
B0 (uS/length_unit)	Zero-sequence capacitive charge, see (x)	uS/length_unit
B1 (uS/length_unit)	Positive-sequence capacitive charge, see (x)	uS/length_unit

(x) If the impedance format is chosen to be sequence data, then Z0 and Z1 must be non-zero.

(*) Configuration of Z matrix (R + j X)

(**) Configuration of B matrix

Available I/O Pins

No	Pin Description	Pin Type	Value/Unit	Instruction
1	Set/Get service status	I/O	1: In-service 0: Out-of-service	lineID/status
2	Get sending end current magnitude of wire j	O	A (RMS)	lineID/ImagFromj where j is 1, 2 or 3
3	Get receiving end current magnitude of wire j	O	A (RMS)	lineID/ImagToj where j is 1, 2 or 3
4	Get sending end current angle of wire j	O	Degree	lineID/IangFromj where j is 1, 2 or 3
5	Get receiving end current angle of wire j	O	Degree	lineID/IangToj where j is 1, 2 or 3
6	Get sending end active and reactive power of wire j	O	kW kVAr	lineID/PFromj lineID/QFromj where j is 1, 2 or 3
7	Get receiving end active and reactive power of wire j	O	kW kVAr	lineID/PToj lineID/QToj where j is 1, 2 or 3
8	Get active and reactive power loss of wire j	O	kW kVAr	lineID/PLj lineID/QLj where j is 1, 2 or 3

Example

See the Line page in phasor08_IEEE13.xls file in demo PHASOR-08.

Multiphase Line