Modeling Of Islanding Detection Methods For Microgrid

The increase in world demand for energy as well as environmental concern over scarce and limited fossil fuels has significantly triggered the search for environmentally friendly and renewable energy resources. In Malaysia, the system maximum demand in Peninsular has increased 4.65% from the year 2012 to 16,562 MW which has been recorded in May 13, 2013. Hence, to meet future energy requirement, some proactive measures of alternatives or renewable sources of energy must be established. In this context, the Micro-Grid (MG) concept is the potential solution to the issue of scarce natural resources. However, one of the major challenges associated with implementation of MG is to design an appropriate protection scheme which can protect MG in both grid and islanded mode. Considering this, a MG microswitch-based OUV and OUF IDMs through passive, Non-Intelligent IDM techniques was modelled and simulated. Microswitch-based performance testing has been carried out on both grid-connected and island modes, and considering the active power flow between the two systems and accompanying with different faulty conditions on each case and tested it five simulation cases based on the IEEE Standard 1547.4 test systems. These models were also tested with two fault of conditions in IEEE 15-bus radial distribution test system. The investigation from both test systems shows that, the proposed microswitch-based is effectively to perform in grid-connected and islanded modes. It also could import, export and isolate the active power flow without any serious effect in feeding the Unintentional Islanding Test Load and it function effectively under different faulty. Finally, the implemented concept of microswitch-based on MG is recommended to represent actual Malaysian distribution network model and parameters

Techno-Economic Analysis Of LED Lighting: A Case Study In Utem’s Faculty Building

This paper examines the feasibility of adopting LED lamp in replacing the conventional fluorescent lamp. Analysis and comparison have been carried out on the two lighting systems in terms of electrical and photometrical performance. A case study on UTeM’s building has also been presented, which focuses on the economic evaluation. In addition, various lighting energy saving strategies have been proposed. The economic benefits of the respective energy saving measures have been successfully quantified. The study suggests that LED tubes has great potential to replace fluorescent lamps, mainly driven by the cost savings

Reactive Power Imbalance Method for Islanding Detection in Micro-Grid Operation

Micro-grids usage among consumers has become a new attraction due their several of advantage. Its major function is to ensure the stable operation during the fault and a variety of utility grid disruption. Since the utilization of micro-grid become common, the correct application and operation of micro-grid is importance and significant. One of the main challenges in micro-grids operation is islanding detection methods. There are several methods that are handles the islanding detection that each one have advantage and some disadvantage. This paper presents and investigates the Reactive Power Imbalance Method for islanding detection. The passive algorithm implements in this paper due to the low cost operation, however it got the higher non-detection zone (NDZ) and slower response time compare some active methods. The micro-grid simulation is modeled in Matlab/Simulink program and the results of the monitoring are discussed as well. As the result, the performance of the Reactive Power Imbalance method for the islanding detection state is compared with the simulation model without control algorithm. Finally, the micro-grid model capability with control algorithm is shown in order to meet the load demand

Performance Assessment of Slip Mode Frequency Shift (SMS) Islanding Detection Methods

The awareness concerning of the grid connected PV has become vital and a major concern, nowadays. Islanding detection is one of the most dominant challenges for distribution generation system connected to the main grid. Commonly, islanding is not preferable power systems, because it poses a safety hazard and may cause damage to power generation and power supply facilities as a result of unsynchronized re-closer. To ensure the safety and reliability, there are various islanding detection methods which have been proposed by researchers recently. One of the available islanding prevention methods is the Slip Mode Frequency Shift (SMS) method which is very common and has numerous advantages over others. This paper investigates the active islanding detection methods and specifically has been focused on SMS islanding method. The results show that SMS method is successfully proven to be feasible and reliable to supply the demand load during an unintentional fault. In addition, this method offer a good protection for those being implemented in Malaysia

A REVIEW ON MICRO-GRID AND DEMAND SIDE MANAGEMENT AND THEIR RELATED STANDARDS

Nowadays, the standards of industrial civilization are known as a reliable solution and consequently, comprehensive standards for power system has been developed for use in national and international networks. Malaysia’s efforts to develop power system utilization standards are still ongoing and maturing. However, in some cases it is observed that the standards are not be considered in the power system. In the results, besides reducing productivity, quality, and losing, risks and hazards are realized residents, staff, equipment and electrical installations and facilities. This paper discusses the consideration of the standards of the Micro-Grids (MGs), Islanding and Demand Side Management (DMS) that can be applied in the power system network. Aspects and standards of each role in the power system network are described in the following subsection