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This paper discusses the design considerations of High Frequency (HF) magnetics to be used in Linear Level Control (LLC) converters. Most of LLC converter design starts with LLC parameters calculation. The magnetics are then designed to match the requirements. However, this is not always the most optimized result as the implemented magnetics does not operate at maximum efficiency. Therefore, this...
This paper discusses design methodologies for implementing Smart-MicroGrid testing facility. A Smart- MicroGrid testing facility provides a test-bench environment to develop and analyse new technologies, topologies and control systems for MicroGrid and SmartGrid architectures. These different systems can be analysed with varying levels and types of communication, control, energy storage, distributed...
The approach to optimal control for distributed energy storage systems has been an issue of interest in recent years. In this regard, the performance of power sharing between Energy Storage Units (ESUs) with different States of Charge (SoC) can be enhanced. In this paper, the SoC of each ESU is balanced using the proposed control method, which is decentralized and based on the adaptive droop control...
Energy storages (ESs) are widely used in DC distribution system to compensate power imbalance. Hybrid energy storage system (HESS), which combines various ESs, can optimize energy density, power density and dynamic response. Hierarchical control of HESS is shown able to achieve dynamic power sharing among ESs with improved system reliability. However, system stability of HESS under hierarchical control,...
As the penetration of wind energy increases in the utility grid, the intermittent nature of wind invariably imposes stress to the utility and creates chaos in scheduling energy dispatch. This situation can be improved to a greater extent by introducing energy storage systems along with the wind generation. The addition of energy storage ensures levelised energy output, supports the grid under fault,...
Photovoltaic (PV) panels and electric domestic water heater with storage (DWH) are widely used in households in many countries. However, DWH should be explored as an energy storage mechanism before batteries when households have excess PV energy. Through a residential case study in Queensland, Australia, this paper presents a new optimized design and control solution to reduce water heating costs...
As is well known, the anti-peaking characteristic of wind generation leads to evident curtailments of wind farms. With high energy density and flexible installation position, the battery energy storage system (BESS) can provide a new routine to relax the bottleneck of the peak-load regulation, conducive to the absorption of wind power and the economy of system operation. Therefore, with taking account...
There is an opportunity for commercial customers to use energy storage to charge during low load periods and discharge during peak load periods to reduce demand charges. Energy storage control systems that incorporate load forecasts have an economic relationship with forecast error. The less the forecast error is, the more economically feasible energy storage will be. A range of time series forecast...
Demand response (DR), is one of attractive options for the end-users such as commercial buildings (COBUs), residences, and industrial facilities. In a COBU, the most popular adjustable demand is a chiller system used in heating, ventilation and/or air conditioning loads, which can achieve load reduction in a specified duration by means of pre-cooling (time- shift of chiller operation). On the other...
This paper presented an approach to place single and multiple Energy Storage (ES) units in a distribution network with photovoltaic (PV) units considering energy losses. The approach is based on ALSFmax, which is defined as a difference between the minimum and maximum Loss Sensitivity Factor (LSF) values. The GridLAB-D simulation software is used to model test systems under the study and to validate...
Distributed renewable energy has become a significant contender in the supply of power in the distribution network in Queensland and throughout the world. As the cost of battery storage falls, distribution utilities turn their attention to the impacts of battery storage and other storage technologies on the low voltage (LV) network. With access to detailed residential energy usage data, Energex's...
Because of the constant increase of photovoltaic(PV) permeability, it is needed to configure the energy storage(ES) to reduce the instability caused by PV access of the power distribution network. So that how to configure PV and ES has become an important issue. According to timing characteristics of load and PV output under different seasons and weather conditions, the configuration model of PV and...
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