Optimal Cooperative Management of Energy Storage Systems to Deal with Over- and Under-Voltages

Ghassem Mokhtari,Aminmohammad Saberian,Ghavameddin Nourbakhsh,Negareh Ghasemi,Amjad Anvari-Moghadam

doi:10.3390/en10030293

Abstract

This paper presents an optimal cooperative voltage control approach, which coordinates storage units in a distribution network. This technique is developed for storage systems’ active power management with a local strategy to provide robust voltage control and a distributed strategy to deliver optimal storage utilization. Accordingly, three control criteria based on predefined node voltage limits are used for network operation including normal, over-voltage, and under-voltage control modes. The contribution of storage units for voltage support is determined using the control modes and the coordination strategies proposed in this paper. This technique is evaluated in two case studies to assess its capability.

Highlights

Due to their significant benefit for customers and utilities, renewable energy resources are increasingly utilized in power systems around the world
The results showed that the communication failure has no effect on the voltage control robustness, and still would optimize the storage units with available communication links
This paper proposed a new optimal cooperative voltage support approach for coordination of storage units in a distribution network

Summary

Introduction

Due to their significant benefit for customers and utilities, renewable energy resources are increasingly utilized in power systems around the world. The traditional distribution networks are not designed to accommodate renewable energy resources [1]. Power quality issues gradually are becoming the main concern for future grids with high utilization of these sources [2]. With the high integration of renewable energy generation in distribution networks, voltage violations may occur during high generation and peak load periods, as these events do not happen at the same time [3]. Over-voltage occurs during peak generation times, while under-voltage is experienced during peak load demand periods. National standards usually specify that all node voltages in a network must be kept within a range (usually between 0.94 and 1.06 per unit (pu))

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Discussion

Conclusion