Design and develop a matlab simulink model of low voltage

Assignment Help Simulation in MATLAB

Reference no: EM133538564

Power Quality and Mitigation

Question:
A low voltage distribution network is facing voltage variation problem due to integration of renewable energy resources. It is required to improve operation and control of network by designing and implementing a distribution static synchronous compensator (D-STATCOM) for power quality improvement in asynchronous machine-based distributed generation as the asynchronous generator has poor voltage regulation specially, during peak load conditions.

You are required to design and develop a MATLAB Simulink model of Low voltage network for three-phase, 3-wire loads. The single line diagram of the network, D-STATCOM control design and required parameters are provided in Fig 1, Fig 2 and Table 1 respectively. Main system consists of grid, asynchronous machine with balanced /unbalanced load and D-STATCOM for voltage regulation purpose. A conversion distribution system of 25 kV; 1000 MVA, 50 Hz needs to operate along with an asynchronous generator and DSTATCOM.

443_Basic Structure of LV distribution system.jpg

Fig 1: Basic Structure of LV distribution system

587_Basic Structure of LV distribution system1.jpg

Fig 2: Control scheme of DSTATCOM

Table 1: Parameters for design of D-STATCOM based LV distribution system

Feeder System

25kV, 100MVA, 50 Hz, R= 0.625 ?, L= 0.0199 H

Induction machine

7.5kW, 415V, 50Hz, Y-connected, 4-pole

Rs = 1 Ω, Rr =0.77Ω , Xlr= Xls= 1.5Ω, J= 0.1384kg-m²

D-STATCOM

Lf = 4mH, Rf = 0.1?, and Cdc = 4000uF.

Kpa = 0.04, Kia = 0.0015. Kpd = 0.02, Kid = 0.001.

Prime Mover Characteristics

Tsh = K1-K2 Ar Where, K1 = 32000, K2 = 100

Task 1:
Check the load balancing aspect of STATCOM based voltage regulator system at 3-phase 3-wire balanced/unbalance resistive load condition. Three, single-phase load each of 2.5 kW is applied between each phase and neutral, and observe the magnitude of terminal voltage (vt) and DC link voltage (vdc).

Task 2:
Now replace the load with 3-phase 3-wire balanced/unbalance reactive load (at lagging 0.8 power factor) and check performance of network.

Reference no: EM133538564

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