Multi-objective planning of multi-type distributed generation considering timing characteristics and environmental benefits

This paper presents a novel approach to multi-type distributed generation (DG) planning based on the analysis of investment and income brought by grid-connected DG. Firstly, the timing characteristics of loads and DG outputs, as well as the environmental benefits of DG are analyzed. Then, on the basis of the classification of daily load sequences, the typical daily load sequence and the typical daily output sequence of DG per unit capacity can be computed. The proposed planning model takes the location, capacity and types of DG into account as optimization variables. An improved adaptive genetic algorithm is proposed to solve the model. Case studies have been carried out on the IEEE 14-node distribution system to verify the feasibility and effectiveness of the proposed method and model

Energy and Economic Analysis of Tropical Building Envelope Material in Compliance with Thailand’s Building Energy Code

The building envelope has a direct impact on the overall energy consumption of a building. Thus, an improvement in the building envelope using energy-efficient material can yield the desired energy performance. This study is based on the materials and compositions used in building envelopes in compliance with the building energy code of Thailand. The building under study is an educational building located in Bangkok, Thailand. Both the energy and the economic aspects of retrofitted building envelopes are discussed in this study. The energy performance was evaluated by calculating the thermal transfer value and whole building energy consumption using the building energy code (BEC) software. The simulation was done under the assumption that the building envelope in the case study building was retrofitted with different materials and compositions. The study determines the feasibility of retrofitting buildings using energy-efficient material by utilizing the discounted payback period and internal rate of return (IRR) as indicators. The results show that retrofitted building envelopes in every case can reduce the whole building energy consumption. In the best envelope configuration, energy consumption can decrease by 65%. In addition, the economic potential is also high, with an IRR value of approximately 15% and a payback period of 23 less than nine years. These finding indicate that a building envelope made with energy-efficient material can achieve good results for both energy performance and economic feasibility

การพัฒนาพลังงานหมุนเวียนเพื่อการผลิตไฟฟ้าในประเทศไทย (THE DEVELOPMENT OF RENEWABLE ENERGY FOR GENERATING ELECTRICITY IN THAILAND)

จากความต้องการใช้พลังงานไฟฟ้าที่เพิ่มสูงขึ้นตามการขยายตัวของเศรษฐกิจและสภาพการดำรงชีวิตที่ดีขึ้นของประชาชน ทำให้ประเทศไทยต้องใช้เชื้อเพลิงเป็นจำนวนมากเพื่อตอบสนองต่อความต้องการดังกล่าว เชื้อเพลิงส่วนใหญ่ที่ใช้ในการผลิตกระแสไฟฟ้าในประเทศไทยมาจากเชื้อเพลิงฟอสซิล เช่น ถ่านหิน น้ำมัน และก๊าซธรรมชาติ เป็นต้น เชื้อเพลิงฟอสซิลเป็นเชื้อเพลิงที่มีจำนวนจำกัด ใช้แล้วหมดไปไม่สามารถสร้างขึ้นมาทดแทนได้ในเวลาอันสั้น ประกอบกับการใช้เชื้อเพลิงฟอสซิลก่อให้เกิดสภาวะโลกร้อนและอาจส่งผลให้เกิดการเปลี่ยนแปลงในชีวิตและความเป็นอยู่ของประชาชน ตลอดจนอาจทำให้เกิดภาวะสูญพันธ์ของพืชและสัตว์บางชนิดได้ในอนาคตพลังงานหมุนเวียนสามารถนำมาใช้เพื่อการผลิตไฟฟ้าได้เป็นอย่างดี เทคโนโลยีพลังงานหมุนเวียนบางประเภทได้รับการพิสูจน์และยอมรับว่าสามารถนำไปผลิตไฟฟ้าในเชิงพาณิชย์ได้อย่างมีประสิทธิภาพ เช่น พลังงานแสงอาทิตย์ และพลังงานลม เป็นต้น อย่างไรก็ตามด้วยข้อจำกัดบางประการของพลังงานหมุนเวียนทำให้ต้องมีการกำหนดมาตรการเพื่อส่งเสริมและพัฒนาการใช้พลังงานหมุนเวียน บทความนี้นำเสนอเทคโนโลยีพลังงานหมุนเวียนที่มีศักยภาพในการผลิตไฟฟ้าในประเทศไทย รวมทั้งแนวทางและมาตรการเพื่อที่จะสนับสนุน และส่งเสริมการใช้พลังงานหมุนเวียนเพื่อผลิตไฟฟ้าในเชิงพาณิชย์คำสำคัญ: พลังงานหมุนเวียน พลังงานลม พลังงานแสงอาทิตย์ พลังงานชีวมวล ก๊าซชีวภาพThe demand of electrical consumption is rising due to the improvement of economics and the improvement of living conditions. Thailand has to use and burn a lot of fuels, mostly fossil fuels such as coal, oil, and natural gas, in order to generate electricity. Fossil fuels have limited supply and can not reproduce in a short period of time. In addition, by burning fossil fuel, it can create the global warming which caused species extinction and changes in agricultural yields.Renewable energy can be used to generate electricity. Some renewable technologies have been proved to generate electricity as efficient as conventional technologies but with environmental friendly. This paper presents the renewable technologies that suitable and have high potential to generate electricity in commercial fashion. This paper also discusses the measurements in order to encourage the employment of renewable energy in Thailand.Keywords: Renewable energy, Wind energy, Solar energy, Biomass, Bioga

Analysis of power quality and economic worthiness of electric motorcycle charging in a residential electrical system

Abstract In the urban society of Thailand, most people use motorcycles for travelling because they can meet the manoeuvrability of travelling in short distances and save energy compared to using a car. Many people are switching to electric motorcycles (EMCs), which install EMC chargers in their residential buildings. EMC chargers are power electronic devices that may produce electrical and electromagnetic interference; therefore, it is critical to evaluate the potential influence of an EMC charger on a household electrical system and other electrical equipment before installing one. Therefore, this study examined the effects of an EMC charger on residential electrical systems with and without a photovoltaic system connection as well as on individual load types in terms of power quality. The investigation revealed that EMC charging has a direct impact on the grid system's reactive power, power factor, and current harmonics. However, when the electrical load in the system has sufficient power, it is possible to reduce the reactive power and current harmonics of the grid. The cost of electricity when an EMC is connected to a residential electrical system was also analysed to determine the metre type and charging interval suitable for Thailand

Feasibility Study on Installation of Rooftop Photovoltaic System in Complied with Thailand Energy Building Code

Renewable energy especially solar energy has become a significant part in electrical power generation with its advantage in the environmentally friendly and current trend of decrease in installation cost. The photovoltaic (PV) system on a rooftop is one of the power generating system based on renewable energy that can fit building to utilize space efficiently. This paper is analyzing the feasibility of installing a solar PV rooftop on the building using a case study building located in Bangkok, Thailand. The performance will be evaluated in term of both energy and economic perspective. The comparison with Thailand building energy code also been done to show that overall energy consumption with PV system complies with the law. The result has shown that with rooftop photovoltaic system installation, annual energy consumption in the building can be reduced significantly and it can achieve feasibility in term of economic perspective

Development of public lighting system with smart lighting control systems and internet of thing (IoT) technologies for smart city

This study proposes the design and development of public light systems integrated with Internet of Things (IoT) applications for smart cities. Smart public lighting systems are designed using LED light sources in combination with a controller based on light intensity and motion sensors to control the brightness in working areas as per standard requirements. The control of smart public lighting systems is designed to operate in three modes: manual, scheduled, and auto modes, which are tested and compared in terms of lighting and power quality. Other functions of IoT, such as air pollution detection, security system-based video surveillance, and warning systems for flood disasters, are integrated into smart public lighting systems. A prototype of the designed smart public lighting system is presented in this paper. The parameters of average illuminance, overall uniformity, and threshold increment were implemented using DIALux software to optimise the luminaire spacing. The results showed that the goal of energy saving could be achieved using the auto mode. Although the automatic mode caused current harmonic distortion to the electrical grid, the harmonic value was less than the specified standard. Furthermore, the precision of IoT system operation was dependent on environmental variations and the reliability of wireless network technology