Three-Level SOC Equalization Control Strategy for MMC-BESS Based on Feedforward Sliding Window Integral Method

Table 4

Capacitor voltage distortion rate of c-phase submodule using one-third average method and sliding window integral method.

Harmonic distortion rate of capacitor voltage of submodule
One-third average method:
	5 s	5.2 s	5.4 s	5.6 s	5.8 s
Upper bridge arm of phase C (sm1 ∼ sm4)	13.18%	13.95%	13.94%	15.81%	14.34%
Lower bridge arm of phase C (sm5 ∼ sm8)	12.51%	13.76%	13.35%	14.72%	13.34%
Sliding window integral method:
	5 s	5.2 s	5.4 s	5.6 s	5.8 s
Upper bridge arm of phase C (sm1 ∼ sm4)	13.07%	13.39%	13.49%	13.62%	14.01%
Lower bridge arm of phase C (sm5 ∼ sm8)	12.26%	12.80%	13.24%	12.81%	13.26%