Derive the control transfer function

Assignment Help Electrical Engineering

Reference no: EM132358611

Advanced Electrical Machines and Drives Assignment -

Answer ALL Questions. Need help for electrical machines using Matlab.

Question 1 - A 500 V, 100 hp, 2500 r/min, separately excited DC motor has the following parameters:

Field resistance (R_f) = 109 Ω; Rated field voltage (V_f0) = 300 V; Armature resistance (R_a) = 0.084 Ω; Geometric constant (k_f) = 0.694 V/(A. rad/sec).

Assuming the field voltage to be held constant at 300 V, use MATLAB to plot the motor speed as a function of armature voltage with motor operating under no load and also under rated full load torque as the armature voltage is varied from 250 V to 500 V.

Question 2 - An inverter is connected to the utility network by a transformer. The connection transformer can be modelled by a per-phase series inductance of 0.8 mH and resistance of 0.4 Ω.

i. Derive the control transfer function for the d and q axis loops, showing your fully working.

ii. If a q-loop control with gains of k_p = 14 and k_i, = 900 are used. What is the control loop bandwidth and damping for this loop?

Note - To establish the plant model of a grid connected converter for question 2. You need to show the steps to obtained plant model.

Question 3 - A balanced positive-sequence, Y connected voltage source with E_ab = 450∠0^o V is applied to a balanced Y connected resistive load of 30 Ω. The line impedance between the source and load is Z_L =1∠82^o0 for each phase. Calculate the line currents, the load currents and voltages at the load terminals in per unit.

Reference - Impact on Power System Dynamics of PI Control Limiters of VSC-based Devices by Mohammed Ahsam Adib Murad, Alvaro Ortega and Federico Milano.

Reference no: EM132358611

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len2358611

8/19/2019 12:33:46 AM

Need assignment help for electrical machines using Mat lab. To establish the plant model of a grid connected converter for question 2. you need to show me the steps to obtained that plant model. Actually the subject is electrical machines and drives. In that you need to use MAT lab. This will be useful for question no.2.

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