Comparative analysis of domestic and feeder connected batteries for low voltage networks with high photovoltaic penetration

Abstract

Excessive voltage and power flow issues associated with domestic solar power are threatening UK distribution system operation and the use of energy storage is one method proposed to mitigate these issues. In this study a data orientated approach was taken in order to simulate the effect of the location of the energy storage on the low voltage network. A number of small (<15kWh) domestic batteries were compared to a single larger (>50kWh) feeder connected battery in terms of their ability to shave load demand peaks, fill load demand valleys and counter voltage violations on a typical radial feeder system. To achieve this MatLab was used to create dispatch strategies for each battery and introduce them into an aggregated load, and OpenDSS was then used to model this scenario on a typical UK radial feeder based on the IEEE European Low Voltage Test Case.It was found that the feeder connected battery was more successful at mitigating the thermal overload effects of distributed generation at the low voltage level. Domestic batteries offer ease of installation and consumer support, likely to make their utilisation increasingly inevitable. However, their exposure to domestic energy flows and focus on minimising grid import to the home led to a reduced network level impact. This work shows that a feeder connected battery can respond to the power flows of the aggregated load and thus provides a far more capable tool for reducing network peak loads and preventing feeder system export.

Application of Systems Thinking in Reviewing Power- Infrastructure Capital Investment in South Africa

“…Reverting back to the question above, if the battery gets exhausted or cells die, the loyal paying consumers will be as if he is a non-paying consumer as there will be no supply. Hilton, Cruden and Kent (2017) in their study in the UK, describe domestic battery technology that has to be connected to low voltage system as helpful to support both domestic and off load shaving. The load shaving is ability to reduce load from the grid by shifting it to the battery as the energy source.…”

Battery Storage Integration in Voltage Unbalance and Overvoltage Mitigation Control Strategies and Its Impact on the Power Quality

“…The positive-sequence control strategy forms the sub-case (S1). Equation (9) shows that the resistive behaviour of the three-phase damping control strategy is dependent on the damping conductance g d . Hence, four different values of the damping conductance g d = 5, g d = 10, g d = 20 and g d = 40 p.u.…”

“…To reduce the curtailed active power, a BESS can be incorporated in the DRES. BESSs have great potential to help with the power quality improvement in many aspects such as peak shaving, overvoltage mitigation and voltage unbalance mitigation [8][9][10][11][12]. BESS can have a significant advantageous impact on the load shifting caused by electric vehicles and plug-in electric vehicles [13].…”

Possible Power Quality Ancillary Services in Low-Voltage Grids Provided by the Three-Phase Damping Control Strategy

“…To reduce the curtailed active power, a battery energy storage system (BESS) can be incorporated in the DER. BESSs have a great potential to help with the power quality improvement in many aspects such as peak shaving, overvoltage mitigation, and voltage unbalance mitigation [13][14][15][16][17]. In addition to that, BESS are capable of providing fast transient response during fast solar irradiance change and dips [18].…”