Search

The improvement energy conservation system has been challenging and interesting for small and medium enterprises (SME) of Thailand. This paper presents energy conservation in the knife industry used energy management and brainstorming workshop. Methodology applied energy matrix management and collaboration with community. The results show that this research can be reduce the energy consumption and enhancement of machinery. Moreover, the participant community induced to sustainable development.

In the last few years there has been an increasing incorporation of solar photovoltaic generation in the Uruguayan energy matrix. This paper focuses on the subject of photovoltaic microgeneration connected in the low-voltage network. The aim of this work is to establish an adequate methodology to estimate microgeneration potential in Uruguay. Towards that end, simulations were carried out in softwares Power Factory and SimSEE in order to evaluate the impact this form of generation has on the Uruguayan Electrical System, regarding both technical and economical aspects.

Wireless sensor networks have become ubiquitous in the present world of smart technology. With increasing popularity of WSNs in a number of applications brings the major responsibility of making these networks secure. Thus, providing energy efficient security solutions is the need of the hour. In this paper, we propose an energy efficient key pre distribution approach to establish trust among the nodes. This approach takes into account the energy of the nodes and their relative distances from each other while establishing the keys. Moreover, the existing key pre distribution techniques provide very limited or negligible protection against node compromise attack. The proposed scheme can detect node compromise attack without having the need to share a key ring.

In this last decade, the wind energy has achieved a great expansion in the Brazilian energy matrix. Hence, the study and technology development in this area has become essential for academic community and industry. The aim of this paper is to describe the design, construction and commissioning of a 10(kVA) wind energy system (WECS) prototype converter, using permanent magnet synchronous machine. The design of the main components will be described. The first experimental results are shown and briefly analyzed.

At present, the planning agencies define the percentage objectives of renewable generation with the sense of diversifying the energy matrix and achieving technical and economic sustainability. The objectives in the background may pursue different approaches when determining the optimum or mostly recommended percentage. In this sense, the work is focused on determining relevant technical and economic criteria that allow the definition of adequate percentages of large-scale wind generation. In the work, a methodology is developed that considers the construction of electrical studies scenario, including static, dynamic, voltage stability and contingency analysis, and future scenarios of economic operation. The methodology considers different degrees of wind energy input that allows in each case to assess the degree of technical vulnerability of the system and the cost of planning the long-term operation. In particular, to determine the degree of admissibility of wind power input, relevant operational factors of the operation of power systems are identified and valued. Finally, it recognizes the percentage of wind generation that locates the recommended percentage of additional income. The present article is the first of two papers that analyze the “Criteria for determining the percentage of large-scale wind energy to interconnected systems — Part I: Proposal of Methodology”. Additionally, a second article is presented, which uses the methodology applying it for a real case, Part II: Analysis of the Argentine case.

One way to minimize the problem of energy deficit is to diversify the Brazilian energy matrix, mainly through connecting distributed generation (DG) that uses renewable energy sources — such as biogas from swine manure. This paper aims to estimate the energy potential of power generation from biogas derived from swine manure for a particular study case, also analyzing the impact of DG connection in a distribution network.

Due to the high penetration of renewable energy into the energy matrix of today's power networks, the design of generating systems based only on static reserve assessment does not seem to be enough to guarantee the security of power system operation. From the wind power integration perspective, this energy source imposes additional requirements, mainly due to the inherent unpredictable characteristic of the wind. Besides the uncertainties in load and generating unit availabilities, the operating reserve needs also to deal with the fluctuation characteristic of the wind power. Therefore, more flexibility of the conventional generators (hydro and thermal) is required to provide system support services. This paper discusses a new methodology based on chronological Monte Carlo simulation to evaluate the operating reserve requirements of generating systems with large amounts of renewable energy sources, in particular, wind power.

Based on the different discharge processes of lightning striking, lightning overvoltage can be divided into two types: induced lightning overvoltage and direct lightning striking overvoltage (including back-flash and shielding failure). The characteristics of these overvoltages are investigated in this paper and it is concluded that induced lightning overvoltage exists simultaneously in three phases of the transmission line and similarity of its inter-phase is more significant than that of direct striking lightning overvoltage. Therefore the energy matrix similarity dependent method with the implement of wavelet transform can be applied to identify them. Mass simulation with consideration for many different fault conditions has been computed to prove its effectiveness based on ATP.