This paper proposed a Hybrid PI-Fuzzy based Static Var Compensator for minimizing voltage deviations as the integration of wind power generation to the distribution network. Hybrid PI-Fuzzy Logic controller constructed by the cascade-connected conventional PI controller and Fuzzy Logic controller. This algorithm combined the advantages and minimized the disadvantages of each conventional controller. The control method applied to the Static Var Compensator, which functioned as a dynamic reactive power source. The controlled dynamic reactive power source influenced the system with proper reactive power value, which resulted in the voltage regulation. Two scenarios were carried out to investigate the efficacy of the proposed method. The first scenario demonstrates the performance of the proposed system in wind speed variations and the second scenario in load variation conditions. Finally, the comparisons with Fuzzy Logic Controller-based self-tuning PI control were made to investigate the performance of the proposed control method. Simulation results verified that the proposed control algorithm outperformed the FLCbased self-tuning PI controller, in terms of the steady-state voltage deviation minimization by 1.47% and the settling time of the voltage respond decrement by 92.78%.

/pdf/voltage-deviation-minimization-of-grid-connected-wind-2rhxwok7wu.pdf

Voltage Deviation Minimization of Grid Connected Wind Generation System Using Hybrid PI-Fuzzy Logic Controller Based Static Var Compensator

Energy crisis and environmental pollution caused by conventional energy power generation make renewable energy such as wind energy and solar energy as new alternative energy sources. The complementarity of wind-solar hybrid generation technology will be the focus of future research. This paper briefly introduce the current situation of the development of wind-solar hybrid generation system, the principle and analysis method of low frequency oscillation in power system are summarized. Including modeling and simulation, system oscillation modes and damping characteristics, and improve the system damping characteristics control strategy, etc. This paper provide a reference for further study of the influence on the characteristics of low frequency oscillation in power grid.

https://dpi-proceedings.com/index.php/dtetr/article/download/10775/10325

A Review on Impacts of Wind-Solar Hybrid Generation System on Low Frequency Oscillation of Power System

The low voltage ride through(LVRT) capability is one of the most important problems in the large-scale wind generators connecting to the distribution gridSince the most voltage sags in the system are caused by faults in feeders,the voltage sags propagation characteristics is key to the design of control strategy of LVRT for wind turbinesIn order to enhance the LVRT capacity of wind farm by shortening fault duration from the point of the feeder protection,the profiles of line voltage variations at the fault point are presented with different un-balance fault situationsThe extreme voltage aberration and the occurrence conditions in different earthing resistance and residual situations are quantifiedThe uncommon extreme sags with phase-phase faults is discovered,which may cause the mis-operation of relayIt is also found that the main factors causing extreme sags with phase-ground fault is the value of residual degree factor

Analyzing Voltage Sag Propagation Characteristics of Distribution Systems with Wind Power

The unconstrained access of distributed photovoltaic or the extensive use of distributed photovoltaic grid connection leads to the change of system power flow and voltage distribution, voltage out-of-limit, and other problems. In this paper, the relationship between the distributed photovoltaic capacity ratio and the output power of the inverter AC side is analyzed. Considering the constraints between energy storage and distributed photovoltaic capacity, the energy storage control strategy is proposed. Then, the distribution photovoltaic consumption constraints, the line limit transmission capacity constraint, and voltage constraint are considered. The objective function of the maximum capacity of configurable distributed photovoltaic capacity on the inverter DC side is established. The calculation method of access capacity of distributed photovoltaic considering the capacity ratio is proposed. Finally, a distribution network example is given to verify the effectiveness and adaptability of the proposed method. 

A Method of Calculating the Accessible Capacity of Distributed Photovoltaic in a Distribution Network Considering Capacity Ratio

The unconstrained access of distributed photovoltaic or the extensive use of distributed photovoltaic grid connection leads to the change of system power flow and voltage distribution, voltage out-of-limit, and other problems. In this paper, the relationship between the distributed photovoltaic capacity ratio and the output power of the inverter AC side is analyzed. Considering the constraints between energy storage and distributed photovoltaic capacity, the energy storage control strategy is proposed. Then, the distribution photovoltaic consumption constraints, the line limit transmission capacity constraint, and voltage constraint are considered. The objective function of the maximum capacity of configurable distributed photovoltaic capacity on the inverter DC side is established. The calculation method of access capacity of distributed photovoltaic considering the capacity ratio is proposed. Finally, a distribution network example is given to verify the effectiveness and adaptability of the proposed method.

With the national energy structure adjustment accelerating the development of the scale of large grid-connected wind farm, large-scale and high degree of concentration grid-connected wind farm has a great impact on power adjustment control, power quality, and grid stability. This paper has studied the impact of large-scale and grid-connected wind farm on voltage sag propagation characteristics, voltage sag area and transient stability. The improved RX power flow model is applied to wind turbines and three typical large-scale wind farm models are built based on the IEEE 39 bus standard test system. This paper has also studied the effects of different short circuit faults on voltage sag area and propagation characteristics when the grid incorporates the wind farm. In addition, the system transient stability is simulated and analyzed on wind power, fault location and duration. The rule of the effects on power system transient stability is concluded. A series of improved measures are put forward to solve the above problems. This study provides the basis and reference for the realization of large-scale new energy power safety and efficient utilization.

Study on voltage sag area and transient stability in power system with wind farm

To avoid the calculation of limit access capacity of photovoltaic (PV) source is incorrect due to the consideration of the occurrence of a small probability event, this paper proposes a method to calculate the limit access capacity of photovoltaic (PV) source based on the chance onstraints of voltage deviation on the basis of considering the randomness of PV power and load. Maximizing limit access capacity of PV is regarded as the goal, the voltage deviation is regarded as the chance constrained condition, the calculation model of limit access capacity of PV is established. Then, using the LHS and Newton-Raphson to calculate the probabilistic load flow (PLF), the statistical properties of node voltage are obtained. Calculation results of PLF and quantum genetic algorithm are used to solve the model. By comparing the results of optimization with heuristic method, the correctness and validity of the proposed method are verified.

Calculation Method of Limit Access Capacity of Photovoltaic Source on the Basis of Chance-constrained Programming in Rural Distribution Network

A large number of photovoltaic access to the power grid will lead to new characteristics of grid harmonics due to the increase of the scale of converter equipment, and photovoltaic power stations are prone to generate harmonic interaction with the distribution network transmission lines to affect the power quality, so it is of great significance to study the harmonic distribution characteristics and resonance degradation phenomenon of photovoltaic power station. In this paper, the photovoltaic power station model is firstly established to analyze its harmonic output characteristics, and then the photovoltaic power station model is connected to different locations of the IEEE34 node test system to study the impact of different access locations on harmonic distribution. Finally, according to the resonance degradation mechanism of transmission lines, the variation of harmonic amplification coefficient and resonant deterioration degree of transmission lines with different distance and different harmonic frequency are studied. The effectiveness of the model is validated by simulation, and the harmonic distribution law and harmonic interaction factors of photovoltaic power stations are obtained, which provides a theoretical basis for harmonic control of photovoltaic power station.

Research on Harmonic Distribution Characteristics and Resonance Degradation Phenomenon of Photovoltaic Power Station

Handle everyday research tasks with reliable, citation-backed results

Your personal Research Agent to handle research tasks with citation-backed results

Popular Tasks used by Researchers

How can I help with your research?

Meet SciSpace

Get more enhanced response by uploading the PDFs you want me to reference.

No relevant PDFs in your library

SciSpace is the AI research assistant for academics. Run systematic literature reviews on 280M+ papers, and write papers with cited sources. Trusted by 1M+ students, PhDs & researchers.

SciSpace | AI for Research

Analyze PDFs

Code & Manuscripts

Funding & Grants

Literature & Patents

Medical & Clinical Data

Systematic Review

Visualize & Present

Web & Data

Build a Google Scholar-like website for your research.

Build a website

Create charts and images for your research

Create a Chart

Write a paper for submission to a journal

Draft a manuscript

Patent Search

Design eye-catching scientific posters in minutes.

Scientific Poster Generation

Systematic Literature Review

One task is running at the moment. Your messages will be shown right after.

Drag and drop or click here to browse

Loved by <highlight>1 million+</highlight> researchers

Extract a list of specific topics and their sources from unstructured text

Topics

Compare and analyze relevant papers that matches with your search

Papers

Get insights from PDFs and bookmarked papers from your library

My library

Recent searches

Try searching for:

Catch AI-generated content in scholarly and non-scholarly content

{ai} Detector

Ai Writer

Get PDF Summaries, highlighted text explanations 

Chat with PDF

Effortlessly create in-text citations and bibliographies in APA and 2,500 other formats

Citation generator

Get explanations, summaries, and answers on academic papers

Ease up your research workflow with {scispace}'s cohort of exciting AI tools

Elevate your academic writing skills and convey your ideas the way you want

Paraphraser

Explore our range of reading and writing tools

Your file is being prepared and should be ready in a few minutes. If it's a large file, it might take a bit longer. You can close this window, and we'll email you the file when it's done.

You have reached a maximum limit of <strong>{limit}</strong> columns in the table. Remove at least <strong>1</strong> column to add or create another one.

Chen Wei

Author Tools

Chat about Author

Papers

Study on voltage sag area and transient stability in power system with wind farm

Calculation Method of Limit Access Capacity of Photovoltaic Source on the Basis of Chance-constrained Programming in Rural Distribution Network

Research on Harmonic Distribution Characteristics and Resonance Degradation Phenomenon of Photovoltaic Power Station