Perunit measurement from simplified synchronous machine
Simscape / Electrical / Electromechanical / Synchronous
The Simplified Synchronous Machine Measurement block outputs
a perunit 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 perunit 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 perunit measurement by using values of elements in the input signal vector in mathematical expressions.
The Simplified Synchronous Machine Measurement block
outputs a perunit measurement from the simplified synchronous machine according to the
output value expressions in the table. For example, when you set
Output to Stator daxis 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 Setting  Output Value Expression 

 pu_EMFa 
 pu_EMFb 
 pu_EMFc 

pu_torque


pu_velocity


pu_vd


pu_vq


pu_v0


pu_id


pu_iq


pu_i0

 $$\sqrt{pu\_P{t}^{2}+pu\_Q{t}^{2}}$$ 

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


pu_Qt = (pu_vq*pu_id) – (pu_vd*pu_iq)

 $$\sqrt{(pu\_v{d}^{2}+\text{}pu\_v{q}^{2})}$$ 
 $$\sqrt{(pu\_i{d}^{2}+pu\_i{q}^{2})}$$ 

power_factor_angle = atan2(pu_Qt, pu_Pt)


cos(power_factor_angle)


load_angle(rad) = atan2(pu_vd, pu_vq)

 $${\theta}_{e}(t)=N{\theta}_{r}(t)$$ 