Yanuarsyah Haroen

Output ripple analysis of multiphase DC-DC converters

This paper presents an output ripple analysis of multiphase DC-DC power converters having an output LC filter. Analytical expressions for the output voltage ripple of two- and three-phase DC-DC power converters are derived. Influence of the coupling coefficient of the output filter inductor on the output ripple is investigated. Because the unique parameters of the LC filter cannot be determined solely based on the specified maximum output ripple, an additional criterion based on minimum energy storage is introduced. A comparative evaluation of single-phase, two-phase, and three-phase DC-DC power converters is presented. The validity of the proposed analysis method is verified by experimental results.

Hybrid direct power control using p-q-r power theory applied on 3-phase 4-wire active power filter

An hybrid control approach of the p-q-r power theory applied to a 3 phase 4 wire active power filter is proposed. The mathematical model developed is based on the direct power control theory. This technique inherits not only the simplicity of the conventional direct power control but also offers a good dynamic response in active filtering. The analysis is verified using the PSIM simulation software.

Prototype development of a Low Cost data logger for PV based LED Street Lighting System

The data logger is an electronic device that records data over time or in relation to location with a built in sensor. The need of data logger is to accomplish monitoring task of street lighting system based on PV Solar Cell in Jakarta province, especially in Thousand Island Regency. Existing PV LED street lighting has not equipped by data logger, therefore monitoring task is done by manually. Prototype developed based on a microcontroller, battery powered, and equipped with internal memory for data storage, and sensors. The system developed should be “Low Power Consumption”, “Low Cost”, portable and easily embedded inside the PV LED Street Lighting controller.

A new type of DC-DC converter for rolling stock auxiliary power supply

Conventionally, the static converter used for rolling stock auxiliary power supply has power circuit topology as well as half bridge converter, resonant half bridge converter and its variant, and buck converter. To solve the problem of requirements for high voltage static switch rating, serially connected flyback converter, and serially connected 3-phase inverter are commonly used. Thyristors and GTO thyristors are widely used for the static switch, thus the switching frequency can not be too high. In this paper, a new method DC to DC converter based on standard half bridge DC to AC converter is presented. This kind of converter can be used in high voltage applications such as auxiliary power supply for rolling stock. This converter has a significant advantage compared to the half and full bridge converter. The proposed converter is verified by experimental results.

Comparison of direct power control with hybrid approach on 3-Phase 4-wire active power filter between p-q-0 and p-q-r power theory

New hybrid control approach of the pq control theory applied to the 3 phase 4 wire active power filter is proposed. This technique inherits not only the simplicity of the conventional direct power control but also offers a good dynamic response in active filtering. In this paper, the proposed control method is implemented for two different instantaneous power theories, i.e. p-q-0 and p-q-r power theory. The comparison between them is oriented around the harmonic contain of the source current for each method and the unbalanced current index. The analysis is verified using the PSIM simulation software.

A new control strategy for three-phase shunt active power filter that based on source instantaneous power

This paper proposes a new control strategy for three-phase shunt active power filter that is capable to operate under three-wire or four-wire systems. It is based on source instantaneous power. The principle of this control method is to eliminate undesired source currents. Calculation of source instantaneous power is needed to determine instantaneous power component that may not be created by the source. This calculation only needs source currents and phase information so the amount of sensors can be minimized. This control method can force source currents nearly sinusoidal and have unity power factor. Application in four-wire system will reduce neutral current at source side. Simulation is done to verify analysis

Study of hybrid PV-diesel power generation system at Sebira Island-Kepulauan Seribu

Sebira Islands is one of the islands in Kepulauan Seribu, Jakarta. This island located at the the north end of the Kepulauan Seribu and not connected to submarine power cable network so that the electricity on this island is limited and only rely on diesel generator set. The government of Jakarta in cooperation with PT. CNOOC and LAPI-ITB are planning to revitalize the system by rebuilding hybrid power system between Photovoltaic panel and Diesel generator set on Sebira Island. This paper aims to make an analytical study for determining the appropriate design. The design was simulated with Homer software and then analyzed technically and economically. In this paper, some design system has been proposed on different scheme. The design has been simulated and the sensitivity analysis has been made on changing of load and fuel cost. The analysis showed that the most feasible scheme to be applied on Sebira Island is the scheme with the percentage fraction of PV and Diesel between 50-70%.

Indirect AC-AC converter 115 V 50/60 Hz-115 V, 400 Hz with modulated accumulated energy chopper and bridge inverter by using MOSFET

This paper presents the implementation and analysis of single phase indirect AC-AC converter 115 Volt, 50/60 Hz to 115 Volt, 400 Hz. To obtain desired output voltage, the input voltage is stepped up to 185 Volt 50/60 Hz and rectified by bridge diode converter. By using modulated DC-DC converter switch plus output filter with carrier frequency 40 kHz and reference frequency 800 Hz, we get the same form signal at DC power output. With the bridge inverter switched at 400 Hz we get sinusoidal voltage 115 V, 400 Hz at the load side. Although we have resistive load, output voltage still has sinusoidal form. Using design implementation with power MOSFET, makes the control circuit simpler. Voltage regulation is done by buck regulator because it is very simple and has high efficiency. The converter is tested under 200 VA load capacity. In certain inductive load condition, the voltage waveform could be disturbed.

Wind speed calculation by using electrical output and wind turbine power curve

Measurements of wind speed usually done by using anemometer, these data can be used as a reference signal to the wind turbine control, or it can be used also for mapping the wind energy potential. Recently, the use of anemometer on wind turbines are often eliminated because of technical and cost reasons. This paper describes an alternative method to determine the upstream wind at the wind turbine without using the anemometer, but using only the electrical output (current and voltage) and the power curve data provided by the wind turbine manufacture. Further, the power curve is mathematically modeled by polynomial interpolation method so that the wind speed equation as a function of power can be determined.

Analysis of Instantaneous Representative Active Power Equality based Control Method for Three Phase Shunt Active Power Filter

This paper proposes a new control strategy for three-phase shunt active power filter that is capable for three-wire or four-wire systems. It is based on instantaneous representative active power equality. The principle of this control method is to equalize the dc component of instantaneous representative active power of the source and load that include zero-sequence power and losses compensation. This control method is capable to operate under nonideal main voltages and can force source currents nearly sinusoidal with unity power factor. Application in four-wire systems will reduce neutral current at source side. Simulations are done to verify analysis