The Analysis of Distribution System with Photovoltaic System Generation Based on Probabilistic Power Flow

2011 ◽  
Author(s):  
Rui-xiang Fan ◽  
Su-nong Wu ◽  
Yan Wang ◽  
Min-xiao Han
Keyword(s):  
Distribution System ◽  
Power Flow ◽  
Photovoltaic System ◽  
System Generation ◽  
Probabilistic Power Flow

The Calculation of Photovoltaic System Generation Access Capacity in Distribution Network Based on Probabilistic Power Flow and the PSO Optimization

2012 ◽  
Vol 529 ◽  
pp. 371-375
Author(s):  
Lu Yao Ma ◽  
Shu Jun Yao ◽  
Yan Wang ◽  
Jing Yang ◽  
Long Hui Liu
Keyword(s):  
Distributed Generation ◽  
Power Flow ◽  
Optimization Problem ◽  
Flow Model ◽  
Expansion Method ◽  
Pso Algorithm ◽  
Photovoltaic System ◽  
System Generation ◽  
Probabilistic Power Flow ◽  
The Cost

With the distributed generation such as photovoltaic power system (PVS) is largely introduced into power grid, some significant problems such as system instability problem increase seriously. In order to make full use of PVS and make sure the voltage exceeding probability is limited within a certain range to ensure the power quality, as well as consider the cost of access device, the suitable PVS access node and capacity is important. Based on this problem, this paper establishes the probabilistic power flow model of PVS by introducing the combined Cumulants and the Gram-Charlier expansion method. Also, to solve the nonlinear combinatorial optimization problem, this paper uses PSO algorithm. Finally to get the suitable PVS access node and capacity, also calculate the solution of voltage exceeding probability.

scholarly journals Voltage Regulation For Residential Prosumers Using a Set of Scalable Power Storage

Energies ◽  
2021 ◽  
Vol 14 (11) ◽  
pp. 3288
Author(s):  
Igor Torres ◽  
Daniel Farias ◽  
Andre Aquino ◽  
Chigueru Tiba
Keyword(s):  
Solar Radiation ◽  
Distribution System ◽  
Power Flow ◽  
Power Grid ◽  
Voltage Regulation ◽  
Photovoltaic System ◽  
Solar Irradiation ◽  
Storage Device ◽  
Clear Sky ◽  
Calculation Step

Among the electrical problems observed from the solar irradiation variability, the electrical energy quality and the energetic dispatch guarantee stand out. The great revolution in batteries technologies has fostered its usage with the installation of photovoltaic system (PVS). This work presents a proposition for voltage regulation for residential prosumers using a set of scalable power batteries in passive mode, operating as a consumer device. The mitigation strategy makes decisions acting directly on the demand, for a storage bank, and the power of the storage element is selected in consequence of the results obtained from the power flow calculation step combined with the prediction of the solar radiation calculated by a recurrent neural network Long Short-Term Memory (LSTM) type. The results from the solar radiation predictions are used as subsidies to estimate, the state of the power grid, solving the power flow and evidencing the values of the electrical voltages 1-min enabling the entry of the storage device. In this stage, the OpenDSS (Open distribution system simulator) software is used, to perform the complete modeling of the power grid where the study will be developed, as well as simulating the effect of the overvoltages mitigation system. The clear sky day stored 9111 Wh/day of electricity to mitigate overvoltages at the supply point; when compared to other days, the clear sky day needed to store less electricity. On days of high variability, the energy stored to regulate overvoltages was 84% more compared to a clear day. In order to maintain a constant state of charge (SoC), it is necessary that the capacity of the battery bank be increased to meet the condition of maximum accumulated energy. Regarding the total loading of the storage system, the days of low variability consumed approximately 12% of the available capacity of the battery, considering the SoC of 70% of the capacity of each power level.

scholarly journals Performance of Bidirectional Converter Based On Grid Application

2018 ◽  
Vol 12 (3) ◽  
pp. 1203 ◽  
Author(s):  
D. Vidhyalakshmi ◽  
K. Balaji
Keyword(s):  
Distribution System ◽  
Power Flow ◽  
Control Method ◽  
Photovoltaic System ◽  
Reverse Direction ◽  
Power Flow Control ◽  
Bidirectional Converter ◽  
Regulation Method ◽  
And Function ◽  
Cycle Regulation

<p>A transformer less bidirectional inverter fed grid-connected system has implemented and function as both forward and reverse power flow by battery and photovoltaic system. In dc distributed system has utilized the renewable energy such as PV, wind, battery and fuel system. In conventional method the dc bus regulation by using the one line cycle regulation method and one-sixth line cycle regulation. In proposed method utilize both converter and inverter operates bidirectional direction and utilize both solar and PV source. The solar energy had less cost, pollution less energy generation and fed into the bidirectional converter. The PI-based control method is used to operate both forward and reverse direction. The model predictive control method is used in the bidirectional inverter for control the current and voltage of the grid-connected system. The power flow control in the distribution system by the constant power loads such as dc/dc converter because conduct the negative dynamic impedance. The three-phase bidirectional inverter is designed and implemented in MATLAB/Simulink environment.</p>

scholarly journals Improvement of Power Quality in Distribution System using Photovoltaic based DPFC

2021 ◽  
Vol 9 (VI) ◽  
pp. 1038-1042
Author(s):  
Mahesh Shende
Keyword(s):  
Power Quality ◽  
Distribution System ◽  
Power Flow ◽  
High Reliability ◽  
Photovoltaic System ◽  
Unified Power Flow Controller ◽  
Distributed Power ◽  
Flow Controller ◽  
Distributed Power Flow ◽  
Power Flow Controller

In Modern Power System power quality is the main issue of the power companies. Improvement of power quality in distribution system using photovoltaic based DPFC is declared in this paper. Flexible AC Transmission System (FACTS) device which is known as distributed power flow controller (DPFC)is used. DPFC is derived from UPFC by eliminating common dc link between series and shunt converter. Unified power flow controller (UPFC) is widely used and control all parameters of the system. The UPFC handle the current and voltage with high rating; therefore, the cost of system is high. Therefore, distributed power flow controller (DPFC) is used due to high control capability, high Reliability & low cost. DPFC also measures the transmission angle, line impedance and bus voltage. In distribution system problems occur like voltage sag/swell, Harmonics etc. Photovoltaic system is used as source for DPFC.

scholarly journals Power Quality Issues on Distribution System : A Survey

2020 ◽  
Vol 6 (9) ◽  
pp. 11-14
Author(s):  
MD Shahabuddin Alam ◽  
Jyoti Bansal
Keyword(s):  
Power Quality ◽  
Distributed Generation ◽  
Distribution System ◽  
Power Flow ◽  
Reactive Power ◽  
Quality Parameters ◽  
Active Filters ◽  
Photovoltaic System ◽  
Dynamic Voltage Restorer ◽  
Wide Range

Improving the quality of energy in distributed generation is a rapidly growing, challenging, and interesting area of modern times. In recent decades, a large number of techniques have been developed to improve energy quality. This article attempts to comprehensively examine a wide range of methods for improving power quality in distributed generation. This includes the use of active filters, Dynamic Voltage Restorer, DSTATCOM, reactive power compensation techniques, and an unmodified power quality conditioner. In this test, all of these methods are examined with power quality parameters such as reverse power flow, voltage stability, and current harmonics. This document describes energy quality problems and possible effects on the distribution system due to a grid-connected photovoltaic system.

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