Soc energy storage unit ttp

What is a SoC balancing control strategy for energy storage units?

A SOC balancing control strategy for energy storage units with a voltage balance function is proposed. An analysis of SOC trends is carried out in response to the power changing of loads and micro-source. An adaptive virtual resistances algorithm is coordinated with the control strategy of VB to accelerate the balance process.

How to improve the carrying capacity of a distributed energy storage system?

To improve the carrying capacity of the distributed energy storage system, fast state of charge (SOC) balancing control strategies based on reference voltage scheduling (RVSF) function and power command iterative calculation (PIC) are proposed in this paper, respectively.

Which SOC unit keeps a maximum charging power during SoC balancing?

More specifically, it shows that the maximum-SOC unit (i.e., unit 1) keeps a maximum discharging power during most of the SOC balancing process. At the end of the SOC balancing process, the minimum-SOC unit (i.e., unit 3) keeps a maximum charging power for a short time.

What is SOC during VB energy transfer state?

The Δ SOC during VB energy transfer state is compared with the Δ SOC during VB blocked transfer state to clarify the Δ SOC changes caused by VB during the dynamic adjustment of the positive and negative bus voltages. In Fig. 3, Fig. 4, the effects of Psource and PL on Δ SOC show opposite changes.

What are the SOC proportion coefficients of storage units?

The SOC of the storage units are 0.12, 0.28, and 0.8, and the corresponding SOC proportion coefficients are 0.3, 0.7, and 2, respectively. Corresponding to the RVSF curve modified in Fig. 3 (b), the power command curves before and after adding voltage compensation control are shown in Fig. 5.

Why is SOC equilibrium not achieved in light-load conditions?

Although the output power has been adjusted according to the SOC of each energy storage unit, there is no negative power flow in any unit, which means there is no energy interaction among the storage units, leading to a slow balancing process. Consequently, with the given light-load condition, the SOC equilibrium is not achieved until t = 200 s.