Mitigating Overvoltage in Power Grids with Photovoltaic Systems by Energy Storage

Abstract

The rise of photovoltaic (PV) penetration is contributing to the increasing incidence of overvoltage detection in the electrical grid during times of high-power generation. Overvoltage can cause disturbances or (partial) failures in the electrical supply network, since the components used are designed for a certain voltage band. One option to counteract too high voltage levels and thus ensure power quality, grid stability and resilience is the absorption of active power by means of a battery energy storage system (BESS). In this paper, we first built a suitable simulation setup for a typical European network section, including a large-scale PV system connected to the 10 kV level and a BESS model. A suitable charging and discharging algorithm for the BESS with the aim to realize peak shaving for the grid voltage was developed and implemented. Simulations, performed in MATLAB/Simulink®, show the dependence of the battery capacity and power on the grid-serving effect of BESS. By determining appropriate values for these two factors a significant reduction of the voltage level could be achieved.

System Dynamics Model of Decentralized Household Electricity Storage Implementation: Case Study of Latvia

“…On the other hand, the parameter "Total funds requested" depends on the requested support for the installation of the PV system, which is affected by the intensity of the support, the amount of installation and investment costs and the requested support for the installation of the storage system, which depends on the investment costs of the battery, system installation and the intensity of the support as well as the total available support. The parameter of the requested total funds is determined according to Equation (9).…”

“…On one hand, recent technology advancements have promoted significant deployment of renewable energy technologies; for example, with an increase in photovoltaic (PV) module production, the prices have reduced significantly [5], and, consequentially, PV cost reduction is said to be one of the most important reasons for an increase in global installed capacity [6]. On the other hand, the practical concerns are frequently related to the fluctuating nature of solar resources and PV power intermittency [7,8] and subsequent overvoltage incidents [9]. Hence, the transition toward sustainable power generation from renewable sources is not viable without sufficient energy storage [10].…”

“…ESSs can be deployed at various scales. Landl and Kirchsteiger [9] use Matlab/Simulink to analyze a large-scale PV farm and battery energy storage system (BESS) in the European network context. Research on renewable energy source (RES) and ESS integrated use at the single-dwelling, multi-house and even village levels is currently progressing.…”

Avoiding PV-Induced Overvoltage through Grid-Connected Batteries Using Model Predictive Control

“…In this paper, a previously published work of the authors [24] is significantly extended by developing a predictive control algorithm for the BESS. The contribution of the paper is to propose an algorithm which allows to uniformly reduce the occurring overvoltage, where the uniform reduction depends on the BESS capacity.…”

Evaluation of LVRT capability and stability analysis of VSC based advanced control approach for grid connected PV system under grid fault conditions

“…In [ 32 ] an appropriate charging and discharging algorithm for the battery energy storage was presented for mitigation of over voltages caused by connected PV systems. However, voltage sags are considered the most repeated abnormal condition occurring in GCPV systems.…”