Background control system of energy storage power station

Can multi-energy storage support black-start based on dynamic power distribution?

Aiming at the problem that wind power and energy storage systems with decentralized and independent control cannot guarantee the stable operation of the black-start and making the best of power relaxation of ESSs, a coordinated control strategy of multi-energy storage supporting black-start based on dynamic power distribution is proposed.

How is energy storage power station distributed?

The energy storage power station is dynamically distributed according to the chargeable/dischargeable capacity, the critical over-charging ES 1# reversely discharges 0.1 MW, and the ES 2# multi-absorption power is 1.1 MW. The system has rich power of 0.7MW in 1.5–2.5 s.

Why does a sectional energy storage power station fail?

Due to the disordered charging/discharging of energy storage in the wind power and energy storage systems with decentralized and independent control, sectional energy storage power stations overcharge/over-discharge and the system power is unbalanced, which leads to the failure of black-start.

Can multiple energy storage power stations participate in black-start?

The multiple energy storage state has been formed. Therefore, in order to ensure the successful implementation of black-start, multiple energy storage power stations instead of one are usually adopted to participate in the black-start .

What is the control model of energy storage VSC?

The control model of energy storage VSC In order to ensure the smooth implementation of black-start, as the ESSs used in this paper is the auxiliary black-start power supply. One of the ESSs is controlled by V/f, which can keep the stable frequency and voltage.

How does the energy storage power station absorb the abundant power?

The energy storage power station absorbs the abundant power according to the ratio of chargeable/dis-chargeable capacity by 5:1. Up to 3.5 s, the ES is continuously discharged. If not corrected by Δ SOC, critical-charge ES 2 # will continue the critical discharge.