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Simplified Synchronous Machine Measurement

Per-unit measurement from simplified synchronous machine

Since R2020b

Libraries:
Simscape / Electrical / Electromechanical / Synchronous

Description

The Simplified Synchronous Machine Measurement block outputs a per-unit measurement associated with a connected Simplified Synchronous Machine block. The input of the Simplified Synchronous Machine Measurement block connects to the pu output port of the Simplified Synchronous Machine block.

You set the Output parameter to a per-unit measurement associated with the simplified synchronous machine. Based on the value you select, the Simplified Synchronous Machine Measurement block:

  • Directly outputs the value of an element in the input signal vector

  • Calculates the per-unit measurement by using values of elements in the input signal vector in mathematical expressions.

The Simplified Synchronous Machine Measurement block outputs a per-unit measurement from the simplified synchronous machine according to the output value expressions in the table. For example, when you set Output to Stator d-axis voltage, the block directly outputs the value of the pu_ed element in the input signal vector. However, when you set Output to Reactive power, the block calculates the value from the pu_ed, pu_eq, pu_id, and pu_iq elements.

Output Parameter SettingOutput Value Expression

EMF phase A

pu_EMFa

EMF phase B

pu_EMFb

EMF phase C

pu_EMFc

Electrical torque

pu_torque

Rotor velocity

pu_velocity

Stator d-axis voltage

pu_vd

Stator q-axis voltage

pu_vq

Stator zero-sequence voltage

pu_v0

Stator d-axis current

pu_id

Stator q-axis current

pu_iq

Stator zero-sequence current

pu_i0

Apparent power

pu_Pt2+pu_Qt2

Real power

pu_Pt = (pu_vd*pu_id) + (pu_vq*pu_iq) + 2(pu_v0*pu_i0)

Reactive power

pu_Qt = (pu_vq*pu_id) – (pu_vd*pu_iq)

Terminal voltage

(pu_vd2+pu_vq2)

Terminal current

(pu_id2+pu_iq2)

Power factor angle

power_factor_angle = atan2(pu_Qt, pu_Pt)

Power factor

cos(power_factor_angle)

Load angle

load_angle(rad) = atan2(pu_vd, pu_vq)

Rotor electrical angle

θe(t)=Nθr(t)

Ports

Input

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Physical signal associated with the per-unit measurements from a connected Simplified Synchronous Machine, specified as:

  • pu_EMFa

  • pu_EMFb

  • pu_EMFc

  • pu_torque

  • pu_velocity

  • pu_vd

  • pu_vq

  • pu_v0

  • pu_id

  • pu_iq

  • pu_i0

Output

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Physical signal output port associated with the per-unit measurement, returned as a physical signal.

Parameters

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Per-unit measurement from simplified synchronous machine. The default value is EMF phase A.

Extended Capabilities

C/C++ Code Generation
Generate C and C++ code using Simulink® Coder™.

Version History

Introduced in R2020b