Power Flow in a Load-Current Sensorless Shunt Active Power Filter

In this paper, power flow analysis of a three-phase four-wire system with a shunt active power filter in steady state is presented. The analysis begins with a mathematical model of the power inverter and continues to find the relationship of the real and imaginary power as well as zero sequence power in the grid, loads, and the inverter (AC and DC sides) for successful compensation. The system includes mixed non-linear loads with significant unbalanced components. The filter consists of a three-phase current-controlled voltage source inverter (CC-VSI) with a filter inductance at the AC output and a DC-bus capacitor. The CC-VSI is operated to directly control the AC grid current to be sinusoidal and in phase with the grid voltage. Computer simulation results verify the concept of the filter and the power flow

Alat Uji Baterai 12V 60AH Secara Elektronis

This research discusses the implementation of electronic circuits for battery testing to replace the manual tester that is usually used in Switchyard. The equipment consists of constant-current controlled circuit to produce relatively constant current according to battery capacity so that it is able to be used as a battery tester based on a charge-and-discharge method with constant current. PC based data acquisition is used in order to have data that are more accurate. Experimental results in testing 12 V, 60 AH battery demonstrates the ability of the equipment to replace the manual one as a battery tester

OPTIMALISASI PEMBELAJARAN ELEKTRONIKA DAYA DENGAN MENGGUNAKAN SIMULASI KOMPUTER

Elektronika daya penting dipelajari oleh mahasiswa Program Studi Teknik Elektro. Namun, seringkali tidak mudah bagi mahasiswa untuk memahami kerja rangkaian elektronika daya dan membayangkan bentuk gelombang tegangan dan arus. Dosen juga seringkali kesulitan menyampaikan materi pembelajaran karena keterbatasan bahan visualisasi. Karena itu, metode alternatif yang tepat untuk pembelajaran mata kuliah Elektronika Daya adalah dengan simulasi komputer. Program simulasi yang digunakan adalah PSIM yang dikhususkan untuk simulasi rangkaian elektronika daya dan penggerak motor. Dengan simulasi komputer (PSIM), proses pembelajaran konverter menjadi lebih mudah. Hal ini terlihat dari hasil kuesioner yang menyatakan bahwa penggunaan PSIM membantu mahasiswa di Program Studi Teknik Elektro, UK Petra, Surabaya, untuk memahami konsep mata kuliah Elektronika Daya. Dari tingkat kelulusan yang tinggi, tampak bahwa penggunaan simulasi komputer mampu mengoptimalkan pembelajaran mata kuliah ini.Kata kunci: Pembelajaran Elektronika Daya, Simulasi Kompute

Application of a CC-VSI for Active Filtering and Photovoltaic Energy Conversion with a 1-to-1 MPPT Controller

This paper focuses on the implementation of a three-phase four wire current-controlled Voltage Source Inverter (CC-VSI) as both PV energy extraction and power quality improvement. For power quality improvement, the CC-VSI works as a grid current-controller shunt active power filter. Then, the PV array supported by a Look-up Table type of a MPPT controller is coupled to the DC bus of the CC-VSI. The output of MPPT controller is a DC voltage that determines the DC-bus voltage according to the PV maximum power. The computer simulation results show that the system works properly in steady state and dynamic condition

Harmonic Mitigation Using a Polarized Ramp-time Current-Controlled Inverter

 This paper describes the implementation of a shunt active power filter for a three-phase four-wire system to overcome the power quality problems generated by mixed non-linear loads which are a combination of harmonic, reactive and unbalanced components. The filter consists of a three-phase current-controlled voltage source inverter (CC-VSI) with a filter inductor at the AC output and a DC-bus capacitor. The CC-VSI is operated to directly control the grid current in order to be sinusoidal and in phase with the grid voltage without sensing the load currents. The switching is controlled by using polarized ramp-time current control, which is based on the concept of zero average current error (ZACE) with a fixed switching frequency. The laboratory experiment results indicate that the filter is able to mitigate the harmonics and the reactive power, so that the grid currents are sinusoidal, in phase with the grid voltages, and symmetric although the grid voltage contains harmonics

Simulation of Active Filtering Applied to a Computer Centre

In this paper, the implementation of a shunt active power filter with a small series reactor for a three-phase system is presented. The system consists of computer loads, which are harmonic voltage sources, with significant unbalanced components. The filter consists of a three-phase current-controlled voltage source inverter (CC-VSI) with a filter inductance at the AC output and a DC-bus capacitor. The CC-VSI is operated to directly control the AC grid current to be sinusoidal and in phase with the grid voltage. The simulation results indicate that the filter along with the series reactor is able to handle the harmonic voltage sources, as well as the unbalance, so that the grid currents are sinusoidal, in phase with the grid voltages and symmetrical

Application of a CC-VSI for Active Filtering and Photovoltaic Energy Conversion with a 1-to-1 MPPT controller

This paper focuses on the implementation of a three-phase four wire current-controlled Voltage Source Inverter (CC-VSI) as both PV energy extraction and power quality improvement. For power quality improvement, the CC-VSI works as a grid current-controller shunt active power filter. Then, the PV array supported by a Look-up Table type of a MPPT controller is coupled to the DC bus of the CC-VSI. The output of MPPT controller is a DC voltage that determines the DC-bus voltage according to the PV maximum power. The computer simulation results show that the system works properly in steady state and dynamic condition

Modeling of Energy Production of Sengguruh Hydropower Plant Using Neuro Fuzzy Network

The hydroelectric power plant needs to be operated carefully to obtain optimal results, as it is highly dependent on water availability. Factors to take into account are the water discharge and the duration of time for the operation. Decomposition analysis method is the method chosen to manage the operation of hydropower. This paper discusses the hydropower operation model using artificial intelligence with Neuro Fuzzy Takagi-Sugeno (NFTS) network technique. The Hydropower plants selected for modeling is Sengguruh Hydroelectric Power Plant with a capacity of 29 MW. This model was developed using three factors as inputs. They are the discharge of water, turbine water discharge and duration of operation time. The output is electric energy production. The data used is the operating data for one year, from January to December. The model testing shows satisfactory results as it reveals the real conditions and the errors occurred on the network was below 6.7%