OpenIPSL.Electrical.Branches.PSAT

Branch models from PSAT

Information

Extends from Modelica.Icons.Package (Icon for standard packages).

Package Content

Name	Description
TwoWindingTransformer	Modeled as series reactances without iron losses
ThreeWindingTransformer	Three winding transformer model from PSAT
PhaseShiftingTransformer	Phase Shifting Transformer (PST)
ULTC_VoltageControl	Under Load Tap Changer, continuous model, secondary voltage control

OpenIPSL.Electrical.Branches.PSAT.TwoWindingTransformer

Modeled as series reactances without iron losses

Parameters

Name	Description
Power flow
S_b	System base power [V.A]
V_b	Sending end bus voltage [V]
Transformer parameters
Sn	Power rating [V.A]
Vn	Voltage rating [V]
rT	Resistance(transformer base) [1]
xT	Reactance(transformer base) [1]
m	Optional fixed tap ratio
Visualisation
displayPF	Display power flow results:

Connectors

Name	Description
p
n

OpenIPSL.Electrical.Branches.PSAT.ThreeWindingTransformer

Three winding transformer model from PSAT

Parameters

Name	Description
Power flow
S_b	System base power [V.A]
V_b	Sending end bus voltage [V]
Transformer parameters
Sn	Power rating [V.A]
Vn	Voltage rating for transformer [V]
r12	Resistance of the branch 1-2 (transformer base) [1]
r13	Resistance of the branch 1-3 (transformer base) [1]
r23	Resistance of the branch 2-3 (transformer base) [1]
x12	Reactance of the branch 1-2 (transformer base) [1]
x13	Reactance of the branch 1-3 (transformer base) [1]
x23	Reactance of the branch 2-3 (transformer base) [1]
m	Fixed tap ratio [1]

Connectors

Name	Description
b1
b2
b3

OpenIPSL.Electrical.Branches.PSAT.PhaseShiftingTransformer

Phase Shifting Transformer (PST)

Information

The following documentation is adapted from [Milano2010], chapter 11.2.3:

Phase Shifting Transformers (PhSTs) are able to vary the phase shifting angle φ to control the active power flow. These devices are used in meshed networks for reducing the congestion on some transmission lines and/or properly redis- tributing active power flows in transmission lines. A fairly complete review of PhST technologies can be found in [Verboomen2005].

[...]

The measured pmes of the real power flow pk is compared with the desired power flow pref and a PI controller is used for varying the phase angle φ.

[...]

The phase angle φ is subjected to an windup limiter. [...] It is relevant to note that connecting two areas of a network only by means of PhSTs can lead to unsolvable cases, as PhSTs impose the total real power transfer between the two areas.

Parameters

Name	Description
Power flow
S_b	System base power [V.A]
V_b	Sending end bus voltage [V]
Transformer parameters
Sn	Power rating [V.A]
Vn	Voltage rating [V]
rT	Resistance (transformer base) [1]
xT	Reactance (transformer base) [1]
m	Optional fixed tap ratio
Phase controller
pref	Desired power flow [1]
Kp	Proportional gain
Ki	Integral gain
Tm	Measurement time constant [s]
alpha_max	Maximum phase angle [rad]
alpha_min	Minimum phase angle [rad]
Initialization
pmes0	Initial measured power flow [1]
alpha0	Initial phase shifting angle [rad]

Connectors

Name	Description
n
p

OpenIPSL.Electrical.Branches.PSAT.ULTC_VoltageControl

Under Load Tap Changer, continuous model, secondary voltage control

Parameters

Name	Description
Power flow data
S_b	System base power [V.A]
Vbus1	Sending end Bus nominal voltage [V]
Vbus2	Receiving end Bus nominal voltage [V]
Transformer data
Sn	Power rating [V.A]
Vn	Voltage rating [V]
rT	Transformer resistance(transformer base) [1]
xT	Transformer reactance(transformer base) [1]
Voltage control
v_ref	Reference voltage [1]
v_0	Initial voltage magnitude of the controlled bus [1]
kT	Nominal tap ratio (V1/V2)
m0	Initial tap ratio [pu/pu]
m_max	Maximum tap ratio [pu/pu]
m_min	Minimum tap ratio [pu/pu]
H	Integral deviation [1]
K	Inverse time constant [1/s]

Connectors

Name	Description
p
n

Automatically generated Mon Oct 10 14:35:55 2022.