scholarly journals Variable Speed DC Generator Voltage Control using a Multistage Comparator

2021 ◽  
Vol 3 (1) ◽  
pp. 18
Author(s):  
Augustinus Sujono ◽  
Feri Adriyanto ◽  
Hari Maghfiroh ◽  
Joko Slamet Saputro ◽  
Agus Ramelan
Keyword(s):  
Output Voltage ◽  
Power Plants ◽  
Analog Circuit ◽  
Voltage Control ◽  
Voltage Source ◽  
Comparison System ◽  
Voltage Level ◽  
Automotive Engines ◽  
Generator Voltage ◽  
Generator Output

DC generator with variable rotation will produce uncontrolled voltage, causing problems in its utilization. In this study, it is proposed to develop a voltage control on the generator, in order to produce a fairly controllable and reliable voltage, with an analog circuit using a multistage comparator. Control of the generator output voltage is carried out by adjusting the field current from a separate voltage source which is forwarded to the resistance which is regulated based on the generator output voltage level with a multilevel comparison system. The results obtained are the output voltage ranges from 26 to 30 Volts and the output current ranges from 3 to 20 Amperes. This provides operational safety for the generator and battery. This technology can be used in dc generator systems in automotive engines, windmills, and other power plants.

A Structural-Algorithmic and Parametric Synthesis of Single-Phase Voltage Source Inverters for Increased Power Capacity

2021 ◽  
Vol 2 (2) ◽  
pp. 44-53
Author(s):  
GENNADY S. MYTSYK ◽  
◽  
ZAW HTET HEIN ◽  
Keyword(s):  
Energy Flow ◽  
Output Voltage ◽  
Power Plants ◽  
Single Phase ◽  
Voltage Source ◽  
Phase Voltage ◽  
Power Capacity ◽  
Voltage Source Inverters ◽  
Solar Power Plants ◽  
Output Filter

The recent interest of developers of new technology in studying a structural and algorithmic synthesis (SAS) of voltage source inverters (VSI) for solar power plants (SPP) is stemming from a growing need to solve problems in connection with the revealed new possibilities of converting energy flow (from DC to AC) with better energy efficiency by reducing the depth of its pulse modulation. This problem is solved by using more rational structural and algorithmic solutions. It is shown that for SPPs for a capacity of about 1 MW and more, it is more expedient to construct inverters based on the energy flow multichannel conversion principle. Given a limited power capacity of the transistor components, the application of this principle allows the problem to be solved in fact without using an output filter. The output voltage waveform is shaped using the energy flow pulse-amplitude modulation (PAM), and its M parts are summed in the output circuit by out using M winding transfilters (M-TF). The proposed method for carrying out combined SAS of single-phase voltage source inverters with multichannel conversion is considered, which consists in using an N-level single-phase VSI (N-SPVSI) in each of the M channels with the voltage levels optimized in terms of the minimum total harmonic distortion (THD). The resulting voltage of this class of single-phase inverters, designated as MxN-SPVSI, is formed by the corresponding phase shift of the channel voltages followed by summing the channel currents by M-TF. It is shown that the resulting output voltage levels are also close to their values optimized with respect to the minimum of the THD indicator. The results from a comparative analysis of two options — a single-channel 8-level inverter and a four-channel 8-level inverter are given. For the second option, only one intermediate voltage tap in the solar battery is required (instead of seven taps in the first option) along with modern transistor components that are available for practical implementation. In both options, the THD value less than 5% is obtained with almost no need of using an output filter. The presented results provide a certain information and methodological support for system designing of single-phase voltage source inverters as applied to the specific features of solar power plants. Three-phase inverters can be built on the basis of three single-phase inverters with galvanic isolation of the power sources for each phase.

scholarly journals Hybrid synchronous generator output voltage control with energy storage

2018 ◽  
Vol 12 (7) ◽  
pp. 991-998
Author(s):  
Faycal Bensmaine ◽  
Slim Tnani ◽  
Gérard Champenois ◽  
Olivier Bachelier ◽  
Emile Mouni
Keyword(s):  
Energy Storage ◽  
Output Voltage ◽  
Voltage Control ◽  
Synchronous Generator ◽  
Generator Output

scholarly journals Sistem Pengujian Tegangan Boost Converter Pada Pembangkit ListrikTenaga Air (PLTH) Picohydro Kapasitas Rendah

2020 ◽  
Vol 3 (1) ◽  
pp. 8
Author(s):  
M Suyanto ◽  
Subandi Subandi ◽  
Syafriyudin Syafriyudin ◽  
Isa Mubarok
Keyword(s):  
Output Voltage ◽  
Power Plants ◽  
Electric Energy ◽  
Boost Converter ◽  
Voltage Source ◽  
Test Results ◽  
Dc Voltage ◽  
Hybrid Power ◽  
Long Time ◽  
Solar Power Plants

Voltage testing, on hybrid power plants (PLTH), uses two sources that are solar/solar power plants and waterwheel power plants. Supporting components to produce electric energy conversion one of them is boostconverter which is the main subject. Therefore the author is interested in making and testing the voltage, on the boost converter with the aim to maximize the performance of the DC Genertator as a pensupplay Batterai/accu on PLTH Pico Hydro. The DC-voltage source of the DC-DC converter can be obtained from a generator, or an AC voltage source that is air-conditioned to DC. While Dc-DC converter is a power electronic circuit, to convert a DC to DC voltage input into the output voltage with a greater value. The test results of the voltage from the field data can be concluded as follows. The voltage boost converter test results, on the Pico Hydro Hybrid power plant can produce a voltage of 13 volts from the output DC Generator 8.39 Volt. The output voltage generated by the boost converter is 13.4 volts, can be stable although the output voltage of the generator is variable. With the addition of the tool boost converter on PLTH Pico Hydro, can help battery charging/ACCU to charge the required voltage of the battery is 12 volts, from the boos convevter 13.4 volt long time charging ACCU 5.3 hours.

scholarly journals Evaluasi Pengaruh Tegangan Kerja Generator terhadap Kualitas Tegangan Jaringan pada PT.PLN (Persero) Area Luwuk

2021 ◽  
Vol 19 (2) ◽  
pp. 155
Author(s):  
Herman Nawir ◽  
Muhammad Yusuf Yunus ◽  
Ibnu Amir
Keyword(s):  
Service Quality ◽  
Output Voltage ◽  
Low Voltage ◽  
Voltage Drop ◽  
Quality Parameters ◽  
Operating Voltage ◽  
Medium Voltage ◽  
Generator Voltage ◽  
Generator Output ◽  
Set Value

One of the service quality parameters is that the voltage supplied to consumers is always at the set value, which is 20 kV for medium voltage and 380/220 Volt for low voltage, many factors can affect the magnitude of the voltage starting when the voltage is generated by the generator, the process distribution to consumers by using a conductor and the amount of load that is on the feeder. This study aims to determine how much influence the generator output voltage has on changes in voltage in the medium voltage network and how much voltage drop occurs at the JTM until it reaches the consumer. The results show that the generator output voltage will affect the base voltage, the greater the generator output voltage, the greater the base voltage and operating voltage of the system. The voltage drop along the industrial feeder before the generator voltage is increased is 281,856 Volts or if it is used as a percentage of 1.441% but when the generator output voltage is increased the voltage drop in the industrial feeder decreases by 277.016 Volts or if it is used as a percentage of 1.392%.

scholarly journals Contribution of Voltage Support Function to Virtual Inertia Control Performance of Inverter-Based Resource in Frequency Stability

Energies ◽  
2021 ◽  
Vol 14 (14) ◽  
pp. 4220
Author(s):  
Dai Orihara ◽  
Hiroshi Kikusato ◽  
Jun Hashimoto ◽  
Kenji Otani ◽  
Takahiro Takamatsu ◽  
...  
Keyword(s):  
Reactive Power ◽  
Control Function ◽  
Current Source ◽  
Voltage Control ◽  
Frequency Stability ◽  
Voltage Regulation ◽  
System Stability ◽  
Voltage Source ◽  
Apparent Difference ◽  
Virtual Inertia

Inertia reduction due to inverter-based resource (IBR) penetration deteriorates power system stability, which can be addressed using virtual inertia (VI) control. There are two types of implementation methods for VI control: grid-following (GFL) and grid-forming (GFM). There is an apparent difference among them for the voltage regulation capability, because the GFM controls IBR to act as a voltage source and GFL controls it to act as a current source. The difference affects the performance of the VI control function, because stable voltage conditions help the inertial response to contribute to system stability. However, GFL can provide the voltage control function with reactive power controllability, and it can be activated simultaneously with the VI control function. This study analyzes the performance of GFL-type VI control with a voltage control function for frequency stability improvement. The results show that the voltage control function decreases the voltage variation caused by the fault, improving the responsivity of the VI function. In addition, it is found that the voltage control is effective in suppressing the power swing among synchronous generators. The clarification of the contribution of the voltage control function to the performance of the VI control is novelty of this paper.

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