A Novel Integrating Configuration and A Power Distribution Method for MMC-Based Grid-Connected PV System with Integrated Batteries

2020 ◽  
Author(s):  
Jie Yu ◽  
Zhao Liu ◽  
Jianshou Kong ◽  
Jian Gong ◽  
Li Ding ◽  
...  
Keyword(s):  
Power Distribution ◽  
Pv System ◽  
Distribution Method

scholarly journals Soft-Switching Full-Bridge Converter with Multiple-Input Sources for DC Distribution Applications

Symmetry ◽  
2021 ◽  
Vol 13 (5) ◽  
pp. 775
Author(s):  
Sheng-Yu Tseng ◽  
Jun-Hao Fan
Keyword(s):  
Conversion Efficiency ◽  
Power Distribution ◽  
Distribution System ◽  
Distribution Systems ◽  
Soft Switching ◽  
Maximum Output ◽  
Power Distribution Systems ◽  
Distribution Method ◽  
Dc Distribution ◽  
Multiple Input

Due to the advantages of power supply systems using the DC distribution method, such as a conversion efficiency increase of about 5–10%, a cost reduction of about 15–20%, etc., AC power distribution systems will be replaced by DC power distribution systems in the future. This paper adopts different converters to generate DC distribution system: DC/DC converter with PV arrays, power factor correction with utility line and full-bridge converter with multiple input sources. With this approach, the proposed full-bridge converter with soft-switching features for generating a desired voltage level in order to transfer energy to the proposed DC distribution system. In addition, the proposed soft-switching full-bridge converter is used to generate the DC voltage and is applied to balance power between the PV arrays and the utility line. Due to soft-switching features, the proposed full-bridge converter can be operated with zero-voltage switching (ZVS) at the turn-on transition to increase conversion efficiency. Finally, a prototype of the proposed full-bridge converter under an input voltage of DC 48 V, an output voltage of 24 V, a maximum output current of 21 A and a maximum output power of 500 W was implemented to prove its feasibility. From experimental results, it can be found that its maximum conversion efficiency is 92% under 50% of full-load conditions. It was shown to be suitable for DC distribution applications.

scholarly journals Line-End Voltage and Voltage Profile along Power Distribution Line with Large-Power Photovoltaic Generation System

2019 ◽  
Vol 2019 ◽  
pp. 1-8 ◽  
Author(s):  
Toshiro Matsumura ◽  
Masumi Tsukamoto ◽  
Akihiro Tsusaka ◽  
Kazuto Yukita ◽  
Yasuyuki Goto ◽  
...  
Keyword(s):  
Power Distribution ◽  
Distribution System ◽  
Reverse Current ◽  
Generation System ◽  
Pv System ◽  
Photovoltaic Generation ◽  
Voltage Rise ◽  
Power Distribution System ◽  
Line Current ◽  
Distribution Line

In recent years, the introduction of the photovoltaic generation system (PV system) has been increasing by promoting the use of renewable energy. It has been feared that the reverse current from the PV system may cause an unacceptable level of voltage rise at the interconnection node in the power distribution system. This paper discusses the effects of the reverse current on the voltage rise and fall characteristics of the interconnection node and the voltage profiles along the power distribution line. When the line current on the circuit is small, the voltage on the line monotonically increases from the sending end to the receiving end. When a relatively large current flows, it causes a voltage reduction near the distribution substation. Furthermore, on the basis of the voltage aspects in the power distribution system with a large PV system, the allowable limits of the line current and the output power from PV system are investigated.

Research on Electric Power Distribution Method

2013 ◽  
Vol 373-375 ◽  
pp. 2288-2291
Author(s):  
Hua Ren Zhou ◽  
Yue Hong Qian ◽  
Ze Qing Yao ◽  
Zi Sen Mao
Keyword(s):  
Electric Power ◽  
Electricity Market ◽  
Power Distribution ◽  
Unit Price ◽  
Search Model ◽  
Ramp Rate ◽  
Optimal Search ◽  
Distribution Method ◽  
Electric Power Distribution ◽  
Market Rules

According to the unit price, the section capacity section and the data of ramp rate, in accordance with the electricity market rules, the pushing method and optimal search model of the next time the output of the unit distribution plan are established.

scholarly journals Incorporation of Microgrid Technology Solutions to Reduce Power Loss in a Distribution Network with Elimination of Inefficient Power Conversion Strategies

2021 ◽  
Vol 13 (24) ◽  
pp. 13882
Author(s):  
Mageswaran Rengasamy ◽  
Sivasankar Gangatharan ◽  
Rajvikram Madurai Elavarasan ◽  
Lucian Mihet-Popa
Keyword(s):  
Power Distribution ◽  
Power Loss ◽  
Distribution Systems ◽  
Storage System ◽  
Power Conversion ◽  
Energy Storage System ◽  
Prototype Model ◽  
Solar Pv ◽  
Pv System ◽  
Low Efficiency

The increase in energy-efficient DC appliances and electronic gadgets has led to an upheaval in the usage of AC–DC power convertors; hence, power loss in converter devices is cumulatively increasing. Evolving microgrid technology has also become deeply integrated with the conversion process due to increased power converters in its infrastructure, significantly worsening the power loss situation. One of the practical solutions to this disturbance is to reduce conversion losses in domestic distribution systems through the optimal deployment of the battery storage system and solar PV power using microgrid technology. In this paper, a novel energy management system is developed that uses a new control algorithm, termed Inefficient Power Conversion Elimination Algorithm (IPCEA). The proposed algorithm compares the Net Transferable Power (NTP) available on the DC side with the loss rate across the converter. The converter is switched off (or disconnected from the grid and load) if the NTP is less than 20% of the converter rating to avoid low-efficiency power conversion. The solar PV system is connected to the DC bus to supply the DC loads while the AC loads are supplied from the AC source (utility power). An auxiliary battery pack is integrated to the DC side to feed DC loads during the absence of solar energy. A battery energy storage system (BESS) is deployed to manage energy distribution effectively. The power distribution is managed using a centralized microgrid controller, and the load demand is met accordingly. Thereby, the power generated by the solar PV can be utilized effectively. Microgrid technology’s effectiveness is emphasized by comparative analysis, and the achievements are discussed in detail and highlighted using a prototype model.

scholarly journals Investigating the Impact of Shading Effect on the Characteristics of a Large-Scale Grid-Connected PV Power Plant in Northwest China

2014 ◽  
Vol 2014 ◽  
pp. 1-9 ◽  
Author(s):  
Yunlin Sun ◽  
Siming Chen ◽  
Liying Xie ◽  
Ruijiang Hong ◽  
Hui Shen
Keyword(s):  
Power Distribution ◽  
Large Scale ◽  
Northwest China ◽  
Pv System ◽  
Shading Effect ◽  
Pv Systems ◽  
Large Scale Grid ◽  
Feasible Solutions ◽  
The Impact ◽  
Scale Grid

Northwest China is an ideal region for large-scale grid-connected PV system installation due to its abundant solar radiation and vast areas. For grid-connected PV systems in this region, one of the key issues is how to reduce the shading effect as much as possible to maximize their power generation. In this paper, a shading simulation model for PV modules is established and its reliability is verified under the standard testing condition (STC) in laboratory. Based on the investigation result of a 20 MWp grid-connected PV plant in northwest China, the typical shading phenomena are classified and analyzed individually, such as power distribution buildings shading and wire poles shading, plants and birds droppings shading, and front-row PV arrays shading. A series of experiments is also conducted on-site to evaluate and compare the impacts of different typical shading forms. Finally, some feasible solutions are proposed to avoid or reduce the shading effect of PV system during operation in such region.

scholarly journals Simulation of Grid-Tied Photovoltaic System Based on Solar Irradiance and Temperature Data in Semarang

2019 ◽  
Vol 125 ◽  
pp. 14006
Author(s):  
Ahmed Jumui Sumoi Fomba ◽  
Hermawan Hermawan ◽  
Trias Andromeda ◽  
Mochammad Facta ◽  
Iwan Setiawan
Keyword(s):  
Power Distribution ◽  
Solar Irradiance ◽  
Distribution System ◽  
Photovoltaic System ◽  
Weather Data ◽  
Voltage Source ◽  
Pv System ◽  
Matlab Simulink ◽  
Power Distribution System ◽  
Current Voltage

This paper presents a simulation of a grid-connected photovoltaic power system. A complex model of power distribution system is developed in MATLAB Simulink, then it will be simulated to determine an amount of power delivered to the grid based on irradiance and temperature. Solar irradiance data collection is conducted using a solar irradiance meter. These weather data (solar irradiances and temperatures) are transformed into signal inputs and model through a grid-tied Photovoltaic (PV) model system which consists of PV, incremental conductance Maximum Power Point Tracking (MPPT) method, DC-DC boost converter, inverter, voltage source converter (VSC) control algorithms, and grid equipment. The output variables can be related to current, voltage or power. However, tracing of the current-voltage (I-V) characteristics or power-voltage (P-V) characteristics are the vital need to grid-tied PV system operation. Changes in solar irradiance and temperature imply changes in output variables. Detailed modelling of the effect of irradiance and temperature, on the parameters of the PV module and the output parameters will be discussed. With the aid of this model, one can have a feasible idea about the solar energy generation potential at given locations. This comprehensive model is simulated using MATLAB/Simulink software.

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