ABSTRACT:
Distribution STATCOM (D-STATCOM) is a custom power
device connected in parallel to power system. In this paper, Neuro-Fuzzy
Controller (NFC) which has robust structure is proposed for control of
D-STATCOM’s dq-axis currents. Designed NFC is first order Mamdani type NFC structure
and has two inputs, one output and six layers. DSTATCOM is based on three-level
cascaded inverter and this inverter is controlled with Sinusoidal Pulse Width
Modulation (SPWM) technique. dSPACE’s DS1103 control card is used for real-time
implementation of D-STATCOM’s control algorithm. The performance of D-STATCOM
using NFC is evaluated by changing of reference reactive current (iqref) as
on-line. Under this condition, some experimental results obtained from experimental
setup are given.
KEYWORDS:
1. D-STATCOM
2. Neuro-Fuzzy Current Controller
3. SPWM
4. Three-Level
Cascade Inverter
SOFTWARE: MATLAB/SIMULINK
Fig.1. Three-level cascaded
inverter based D-STATCOM
EXPECTED SIMULATION RESULTS:
Fig.3. iqref tracking performance of iq
Fig.4. Phase-a current and voltage waveforms of
D-STATCOM
Fig.5. Changing of modulation index
Fig.6. Changing of phase angle
CONCLUSION:
In
this paper, NFC is developed to synthesize the current control loop of
D-STATCOM. NFC which is a combination of ANN and FLC gives the D-STATCOM a good
dynamic response and excellent tracking ability in changing of iqref. Experimental
results show that Neuro-Fuzzy current controlled D-STATCOM can provide the
desired reactive power exact and fast within own rated power limits even in the
worst operating condition.
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