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Power system reliability must be considered in the site planning and operation of electric power system. Referring to “Rencana Usaha Penyediaan Tenaga Listrik PLN 2016-2025” document, the annual growth of Jawa Bali System is 8.4%. The growth of the load will increase the power flow in the 500 kV Jawa Bali System in which affects the index value of composite reliability. This study calculates reliability...
In the document of RUPTL 2016–2025, PT.PLN plan to build new power plants with a total capacity of 7,220 MW as part of 35.000 MW project and new transmission lines Tanjung Jati — Cibatu Baru that will be operated in 2019. These projects are located at the northern line of Java Island. Calculation of power system reliability indices is performed at the hierarchy level II which is a combination of generation...
Conventional tubular linear permanent magnet generator (LPMG) is composed of permanent magnets which are placed in translator, and stator which is made of iron. However, this topology suffers from the relatively huge cogging force due to the interaction between the magnet and the iron, also a large core losses from hysteresis and eddy current. To reduce the force and the losses, modified design of...
Due to the significant high waves which usually occurred, the south coast of Java Island has a huge potential of ocean waves energy which can be used to generate electricity. Converting ocean waves energy using permanent magnet linear generator (PMLG) can replace linear to rotational motion converter usage which has large mechanical power losses. However, high power losses in the PMLG's winding can...
Additional intermittent PV generation and variability load profiles can cause problems in voltage regulation of power systems. Nowadays, PV does not participate in the system voltage control; it can cause a voltage increase or decrease and cause voltage fluctuation disturbance along the feeder. However, the situation can be different if PV participated in voltage control. This paper proposes an approach...
Economic dispatch determines the optimal power generation output to meet the system load at the lowest possible cost. Characteristics of each generating unit may have an impact on the effectivity of the method used in solving economic dispatch problem. Conventional gradient-based methods are inapplicable in economic dispatch problem with non-smooth cost functions and multiple fuel options. In this...
Distributed generation (DG) is a distributed generator that employs on the distribution system. The aims of DG in distribution system are to improve the voltage profile, to increase spare capacity, and to reduce the power losses. DG installation on the distribution system needs consideration of optimal capacity and optimal placement. If DG has placed in incorrect location so it can damage and interference...
During this time, the main source of electrical energy derived from fossil energy sources, which is at present the number continues to decrease and become more limited. Therefore, it is necessary to find alternative sources of energy produced by natural processes so it will not run out or quickly reversed if managed properly. In other words, alternative energy sources must be a renewable energy. Some...
Each room in a building has a certain function, for example a lecture hall for learning and teaching activities. Electrical devices in the campus building commonly will be used in accordance with the schedule of room usage. In this paper, we proposed an indoor electrical device control system, which is able to adapt to the kinds of activities and the number of people. The system consists of controller...
Power systems which consist of thermal units with or without take or pay fuel contracts need a proper unit commitment. Proper unit commitment is needed to acquire the generator scheduling plan with minimum total operating cost while also meeting the fuel contracts. Genetic algorithm based on priority list approach is used to solve unit commitment problem. Unit commitment without fuel constraint is...
The south coast of Java Island has significant wave height that allows for wave energy to electric energy conversion. Wave energy converter using permanent magnet linear generator (PMLG) attracting more attention due to its efficiency of the generator and the elimination of translational to rotational motion converter in the generator, but PMLG suffer from electric power losses in the winding. In...
With ever-increasing demand for electricity and complexity of power system, optimal power system operation issue becomes important. Optimal power flow (OPF) with optimal placement and rating of thyristor controlled series capacitor (TCSC) is a solution to determine the economic operating costs and power flow analysis with in constraint stated below. This paper mainly concerned to minimize total cost...
As revealed by the blueprint 2005–2025 of PEN/Pengelolaan Energi Nasional (National Energy Management), government has set a national target in which that all villages in Indonesia by 2025 must be provided by electricity with the electrification ratio of 95%. This is the benchmark that all areas - even the remotest areas - have to be electrified. Bunaken is an area as one of the tourist attractions...
Start-up, loading, and shut-down procedure of induction generator is different from synchronous generator. At the initial time of grid connection, induction generator's voltage is zero. Therefore, it is assumed here that synchronization procedure as normally occurred with a synchronous generator is not required. However, it is well known that in order to operate properly, an induction generator needs...
Voltage and power flow changes caused by Photovoltaic Generation (PV) source will emerge a new challenge towards a conventional distribution system. This study aims to measure the effect of PV source presence on voltage fluctuation disturbance occured in an electrical power transmission network. In this paper, 70 kV-voltage transmission systems were decreased to 10 kV-distribution feeders and modelled...
An important step in energy management especially in electricity planning is demand forecasting. A simple model is presented using LEAP (Long-range Energy Alternative Planning System) as a tool and Sumatera systems as a case study. It aims to be easy to understand and applicable. Electricity demand in household sector is calculated based on data of population, household size, electrification ratio...
Economic feasibility for the development of wind energy potential into wind farm in coastal area of South Purworejo is strategic for Indonesia. The methods used were analysis and evaluation study which involve three analyses, i.e. economic analysis based on scenarios, risk, and sensitivity. The results of the economic analysis based on Scenario 1 with net present value are USD 70 422 642.29 and internal...
This paper presents the completion of unit commitment (UC) problem using genetic algorithm based on priority list approach. In solving this UC problem, reliability constraint is also considered to increase the feasibility of the obtained solution. Reliability constraint used in this paper is loss of load probability index to evaluate the required spinning reserve. Meanwhile, the sub problem, economic...
Yogyakarta does not have any non renewable energy sources such as liquid fossil fuels, coal and natural gas. Consequently, these energy resources must be supplied from other provinces. This study purposed to evaluate the existing energy demand and supply in Yogyakarta and to predict the supply and demand by empowering the use of renewable energy which meets the objective of the energy mix and energy...
This paper presents a comparative study of various controllers for the speed control of Brushless Direct Current Motor (BLDCM) to improve a performance of control. The most commonly used controller for the speed control of BLDCM is Proportional Integral Derivative (PID) controller. However, the PID controller has advantages such as: a good response, the simple structure and robustness of method, but...
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