Study on impacts of large-scale photovoltaic power station on power grid voltage profile

2008 ◽  
Author(s):  
Wang Yi-bo ◽  
Wu Chun-sheng ◽  
Liao Hua ◽  
Xu Hong-hua
Keyword(s):  
Large Scale ◽  
Power Grid ◽  
Voltage Profile ◽  
Power Station ◽  
Grid Voltage ◽  
Photovoltaic Power

scholarly journals LS-Solar-PV System Impact on Line Protection

Electronics ◽  
2019 ◽  
Vol 8 (2) ◽  
pp. 226 ◽  
Author(s):  
Qais Alsafasfeh ◽  
Omar Saraereh ◽  
Imran Khan ◽  
Sunghwan Kim
Keyword(s):  
Large Scale ◽  
Fault Current ◽  
Power Station ◽  
Power Fluctuation ◽  
Phase Selection ◽  
Phase Current ◽  
Photovoltaic Power ◽  
Current Characteristics ◽  
Current Difference ◽  
Component Phase

Large-scale photovoltaic power station access to the grid will profoundly change the fault current characteristics of the power station’s outgoing lines. This change results in adaptive problems in traditional protection phase selection components, which may cause incorrect actions in reclosing, protection ranging, and distance protection. Based on the fault current characteristics of the large-scale photovoltaic power station transmission line, this paper analyzes the adaptability of the phase current difference mutation and the sequence component phase selection component in protecting the Photovoltaic (PV) power plant side of the transmission line. Based on the fault current analytical formula, the phase relationship between the phase current difference and the current sequence component under different control targets, such as suppressing negative sequence current, suppressing the active power fluctuation, and suppressing the reactive power fluctuation, is derived. The operational performances of the phase–phase current difference of the abrupt phase selection component and the sequence component phase selection component of the power station side are degraded, which may cause incorrect operation of the phase selection component. Based on the actual engineering parameters of a PV power plant, a simulation model was built in Power System Computer Aided Design (PSCAD) to verify the correctness of the theoretical analysis.

Comparative Study on Low Voltage Ride-Through Test Methods for Grid-Connected Photovoltaic Inverter

2014 ◽  
Vol 590 ◽  
pp. 495-499
Author(s):  
Wen Jin Wu ◽  
Jian Hui Su ◽  
Hai Ning Wang
Keyword(s):  
Large Scale ◽  
Low Voltage ◽  
Voltage Drop ◽  
Power Grid ◽  
Design For Test ◽  
Grid Voltage ◽  
Low Voltage Ride Through ◽  
Technical Requirements ◽  
Test Platform ◽  
The Stability

The large scale photovoltaic plants have more effects on the stability of regional power grid with the rapid increase of photovoltaic generation ratio in some areas. According to the grid guideline, the photovoltaic inverter is required to maintain the running status even the grid voltage drops and needs to have the capability to contribute towards the stability of power grid voltage and to support the grid voltage ride through. To test the ability of photovoltaic inverter low voltage ride through (LVRT), the test platform to simulate all kinds of fault for voltage drop needs to be set up. By the low voltage through technical requirements, this paper puts forward three kinds of design for test platform and analyzes respective work principle and characteristics, in order to provide optimization solution for the low voltage ride through test work.

Analysis of Output Characteristics of Photovoltaic System

2012 ◽  
Vol 512-515 ◽  
pp. 17-22 ◽  
Author(s):  
Xue Li Zhang ◽  
Qi Hui Liu ◽  
Bei Li ◽  
Hui Meng Ma
Keyword(s):  
Energy Storage ◽  
Large Scale ◽  
Storage System ◽  
Photovoltaic System ◽  
Generation System ◽  
Power Station ◽  
Energy Storage Devices ◽  
Photovoltaic Generation ◽  
Photovoltaic Power ◽  
Output Characteristics

The output of photovoltaic generation system is influenced by the factors such as solar radiation, temperature and so on. So the change of photovoltaic generation power is a non-stationary random process that will impact on the grid. In order to promote large-scale photovoltaic generation connected to the grid, we need to configure energy storage devices for photovoltaic power station and in order to coordinate the allocation of photovoltaic system with energy storage system, we requires a thorough understanding of output characteristics of the photovoltaic system. This paper firstly analyzes the influence brought by the large-scale photovoltaic generation system connected to the grid and then introduces the effect factors of photovoltaic output. Based on the history data of the 100 kWp photovoltaic power station and the statistical method, the paper qualitatively and quantitatively analyzes the photovoltaic output performance; finally puts forward the PV output power evaluation index. The conclusions of this study will provide powerful data references for follow-up studies and have practical value.

scholarly journals Studi Dampak Level Penetrasi Pembangkit Listrik Fotovoltaik pada Jaringan Distribusi

2019 ◽  
Vol 11 (1) ◽  
pp. 1-8
Author(s):  
Septianissa Azzahra ◽  
Agus Yogianto ◽  
Ibnu Hajar
Keyword(s):  
Power Plant ◽  
Modeling And Simulation ◽  
Voltage Drop ◽  
Distribution Network ◽  
Voltage Profile ◽  
Distribution Grid ◽  
Grid Voltage ◽  
Photovoltaic Power ◽  
Power Injection ◽  
Voltage Wave

Recently distribution network have connected with power plant unit also with photovoltaic power plant. Therefore voltage profile of distribution grid not any more distance from source there is voltage drop but connected with photovoltaic power plant would be increase grid voltage in this connected point also in the grid line. In this study, the distribution grid with connected with photovoltaic power plant is modelled. By using through MATHLAB / SIMULINK,  modeling and simulation can be done ondistribution grid with two point connected to the photovoltaic power plant.   From the simulation and analysis obtained, that power injection to grid by photovoltaic power plant can affect voltage grid condition, but not affect grid frequency relatively. The grid voltage will increase if there is power injection to the connected point in grid. Increase the power penetration to the grid would be increase the rise voltage in the grid. The constraint in this case, that power   penetration must be considered the condition of quality voltage because any trend for voltage wave become distorted.

scholarly journals Frequency regulation strategy of photovoltaic system based on system identification

2021 ◽  
Vol 252 ◽  
pp. 02082
Author(s):  
Li Zhenjie ◽  
Hou Guangsong ◽  
Cheng Zhaolong ◽  
Niu Wenhui ◽  
Hu Guohua
Keyword(s):  
Power Generation ◽  
System Identification ◽  
Large Scale ◽  
Control Method ◽  
Power Grid ◽  
Frequency Deviation ◽  
Photovoltaic System ◽  
Frequency Regulation ◽  
Photovoltaic Power ◽  
System Frequency

The large-scale grid connection of photovoltaic power generation results in the power system frequency fluctuation and frequency regulation capacity decline, which endangers the dynamic security of power grid frequency. In order to reduce the frequency deviation of power grid and tap the potential of photovoltaic power generation participating in frequency regulation, a control method of photovoltaic power participating in frequency regulation of power grid is proposed in this paper. The maximum allowable power of photovoltaic power is predicted through system identification, and the load shedding rate is determined based on this, and the output power is corrected according to the system frequency deviation to participate in frequency regulation of power grid. The model based on MATLAB Simulation results shows the effectiveness of the proposed method.

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