Enhanced Instantaneous Power Theory with Average Algorithm for Indirect Current Controlled Three-Level Inverter-Based Shunt Active Power Filter under Dynamic State Conditions

Table 2

THDs of mitigated source current obtained from each harmonics extraction algorithm for capacitive (RC) and inductive (RL) loads.

Harmonics extraction algorithm	Total Harmonic Distortion, THD (%)
	Phase A		Phase B		Phase C
	RC	RL	RC	RL	RC	RL
Before connecting SAPF
N/A	62.30	26.07	62.30	26.07	62.30	26.07
After connecting SAPF
Conventional Theory	2.10	1.24	2.08	1.25	2.12	1.24
Enhanced with average	1.56	1.01	1.52	0.96	1.60	1.02