دانلود رایگان مقاله انگلیسی کنترل هماهنگ شده برای تنظیم ولتاژ توزیع شبکه توسط سیستم های ذخیره انرژی - اشپرینگر 2018

Abstract

With more and more distributed photovoltaic (PV) plants access to the distribution system, whose structure is changing and becoming an active network. The traditional methods of voltage regulation may hardly adapt to this new situation. To address this problem, this paper presents a coordinated control method of distributed energy storage systems (DESSs) for voltage regulation in a distribution network. The influence of the voltage caused by the PV plant is analyzed in a simple distribution feeder at first. The voltage regulation areas corresponding to DESSs are divided by calculating and comparing the voltage sensitivity matrix. Then, a coordinated voltage control strategy is proposed for the DESSs. Finally, the simulation results of the IEEE 33-bus radial distribution network verify the effectiveness of the proposed coordinated control method.

Conclusions

The traditional methods of voltage regulation are not suitable for active distribution system because of the access of PV plant. This paper presents a method of voltage regulation by DESS. The main conclusions are as follows:

(1) The voltage will become more disordered if more PV stations access the distribution network.

(2) The proposed method is able to divide the voltage regulation areas. The DESSs can charge or discharge when the voltage of their own area exceed the limit.

(3) If the voltages of two or more areas exceed the limitation at the same time, the DESSs will act. The effect of two DESSs is larger than one. Taking 8:00 for instance, DESS 2 and 3 discharge respectively 60 kW to make the voltage of their own area back to the normal value, while 45 kW and 40 kW discharged by DESS2 and 3 can achieve this effect when they act both.

(4) When the voltages of some nodes exceed the limit, but the SoC of corresponding DESS is not enough, the other DESS can be coordinated to act. And it can achieve the regulation effect too.

The proposed coordinated control strategy is suitable for medium voltage distribution network or larger system. The future work will deal with adapting active and reactive power to regulate voltage and optimize the output power of multiple DESSs.