Amirullah Ubhara Surabaya
Amirullah Ubhara Surabaya
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Amirullah Ubhara Surabaya
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INTRODUCTION
A three-phase load is applied in remote locations, it requires a single-phase to three-phase switch. Single phase load is connected to a single phase grid using an ACDCAC UPQC (single phase to three phase). A full-bridge three-phase inverter, also known as a three-leg. Because of the three-phase expansion costs, switching from a single-phase to a three-phase power supply is generally expensive [1, 2].
Due to lower cost, smaller volume, redundancy and other factors, three-phase induction motors are preferred in rural regions over single-phase induction motors. The third section presents the operation of the proposed 1ph-to-3ph UPQC in a distribution system with PV integration. The fourth section discusses the simulation results and performance analysis of the proposed UPQC 1ph-to-3ph system.
In [4], the author developed a single-phase to three-phase UPQC to supply three-phase power to rural areas, and this topology suppressed harmonics and sag. In [12] it was proposed to use parallel rectifiers and series inverters to address the single-phase to three-phase imbalance. Instead, the input current of the rectifier circuit will be reduced, and the output voltage of the inverter circuit will be reduced [13]. The double compensation technique also allows simpler algorithms to obtain the desired result [14-16].
The coordinates of the unit are sinθ and cosθ, which use SRF-based controllers, of the three-phase phase-locked loop (PLL) system [19-21]. Researchers built a local three-phase four-wire (3P4W) single-phase power distribution system EPDS from [23] with UPQC capabilities using the 1Phto-3PH converter.
PROPOSED SYSTEM
- PHOTOVOLTAIC MODELLING AND MPPT CONTROL
- DC-DC BOOST CONVERTER
- Fractional current feedback (FCF) MPPT Method
- Reference Signal generation of SAPF
- PARALLEL ACTIVE POWER FILTER (PAPF) CONTROL STRATEGY
- Reference Signal generation of PAPF
- DC LINK VOLTAGE CONTROL – BPNN
According to the authors [8-9], in order to improve energy efficiency and power quality (PQ), they recommended the use of an open unified power quality controller (UPQC-O) in combination with a photovoltaic (PV) array in radial distribution. networks. The proposed 1- to 3-phase UPQC is configured with a single-phase distribution system and PV to combat quality issues and provides power to single-phase and three-phase loads. According to the proposed 1Ph-to-3Ph-UPQC layout shown in Figure 1, the architecture is as follows: single-phase distribution, PV, series active power filter (SAPF), parallel active power filter (PAPF), single-phase filter phase load and three-phase load they are part of this design.
The average voltage across the inductor over a full period is zero in steady-state operation, as shown in equations (2), (3), and (4). 4) The expressions for the inductor and the capacitor are: At the point where the source resistance is equal to the load resistance, the maximum power is transferred to the load, according to the maximum power transfer. The source impedance is currently equal to the load impedance. The Maximum Power Maximum Power Transfer Theory is used to transfer the load.
For SAPF pulses, the reference signal is multiplied by the predicted load voltage compared to the load voltage in the PCC. Using the synchronous reference frame theory, the priority load current is transformed into the dq0 frame by the park transformation. The DC-link voltage function is controlled using a back-propagation neural network in this work.
The measured DC voltage must be subtracted from the reference rating, the error must be bounded to zero using a transfer function, and the control signal must be added to the ID current. The network takes the estimated output as target data from the BPPN, i.e., the current loss component (I*dc) and the associated error as input data.
SIMULATION RESULTS AND DISCUSSION
A single-phase distribution system plus a PV system is connected to linear and non-linear loads and three-phase linear and non-linear loads through the proposed UPQC structure. Droop and swell power quality issues and mitigation responses for linear loads in 1Φ and 3Φ. Droop and swell power quality issues and mitigation responses for nonlinear loading in 1Φ and linear loading in 3Φ.
The simulation response of Sag and Swell Power Quality issues and its damping responses under nonlinear load at 1Φ and linear load at 3Φ are shown in Figure 16. The voltage response at PCC is shown in Figure 16a, 1Φ The load voltage is shown in Figure 16b, 1Φ Load current response is shown in Figure 16c, 3Φ Load voltage is shown in Figure 16d and 1Φ Load current response is shown in Figure 16e. Power quality issues of Sag and Swell and its damping responses under nonlinear load at 3Φ and linear load at 1Φ.
The sag and surge power quality problems and the mitigation responses for the non-linear load in 3Φ and the linear load in 1Φ are shown in Figure 17. The simulation results of the THD response in single-phase load current for the linear and non-linear load circumstances are shown in Figures 18 and 19. The THD response is 1.57% in the linear load condition and in the non-linear load scenario the THD response is 4.20%.
The THD response is 3.80% under linear load condition and the THD response is 4.54% under non-linear load condition. The THD response of the proposed UPQC with BPNN-based DC voltage control and the PI-based THD response are discussed in Table 2.
CONCLUSION
This lowers the overall harmonic content in load voltages to ensure power quality and reliability. Single-phase to three-phase unified power quality conditioner applied in single-wire earth-return electric power distribution grids. An online operation optimization approach for open unified power quality provider for energy loss minimization of distribution networks.
Modeling and distribution of PV generation system integrated with UPQC to improve energy efficiency and power quality of radial distribution networks. Renewable Energy Production. Three-Phase Four-Wire Distribution Systems Based on Dual Control Strategy Venkateswarlu in Unified Power Quality Conditioner for Power Factor Improvement, International Research Journal, Vol 5, No 15 (2018). A versatile unified power quality conditioner applied to three-phase four-wire distribution systems using a dual control strategy.
Nonlinear variable fuzzy gain with improved reference frame synchronous control strategy for performance improvement of unified power quality conditioner. Design and modeling of single-phase PV-UPQC scheme for power quality improvement using a novel filter-based control algorithm:. Power quality improvement by unified power quality conditioner based on CSC topology using synchronous reference frame theory.
Self-sufficient solar power for energy efficiency and improving power quality in a grid-connected system. Power quality improvement in PV integrated single phase distribution system using 1ph to 3ph Upqc supporting single phase and three phase load. Title (line 1) change the title to Improving Power Quality in a PV Integrated Single-Phase Distribution System Using Single-Phase to Three-Phase UPQC Supporting Single-Phase and Three-Phase Loads.
Explain in detail the advantages of partial current reversal MPPT method compared to other MPPT methods like P and O MPPT or Incremental Conductance MPPT in PV modeling.
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