scholarly journals Stabilization of Wind Generator by Using STATCOM/SMES

2009 ◽  
Vol 1 (3) ◽  
pp. 528-538
Author(s):  
M. R. I. Sheikh ◽  
S. M. A. Razzak
Keyword(s):  
Energy Storage ◽  
Wind Speed ◽  
Output Power ◽  
Wind Farm ◽  
Reactive Power ◽  
Moving Average ◽  
Voltage Source ◽  
Storage Device ◽  
Voltage Source Converter ◽  
Wind Generator

In this work, the STATCOM/SMES system with a voltage-source IGBT converter is modeled as a controllable energy source. The objective of the proposed STATCOM/SMES topology is to provide both active and reactive power, which can significantly decrease the voltage and power fluctuations of grid connected fixed speed wind generators. One major problem in wind generator output power smoothing is setting of the reference output power. Constant output power reference is not a good choice because there can be some cases where wind speed is very low and then sufficient power cannot be obtained. In that case, energy storage device can solve the problem but large energy capacity may be needed. To generate output power reference, a Simple Moving Average (SMA) technique is used which corresponds to the energy storage capacity. Thus the capacity of SMES can be small (50% of wind farm capacity). Real wind speed data is used in the simulation analyses, which validates the effectiveness of the proposed control strategy. Keywords: STATCOM/SMES; Energy storage system (ESS); Simple moving average (SMA); Fixed speed wind generator; Voltage source converter (VSC).© 2009 JSR Publications. ISSN: 2070-0237 (Print); 2070-0245 (Online). All rights reserved.DOI: 10.3329/jsr.v1i3.2605         J. Sci. Res. 1 (3), 528-538 (2009)

Three-phase series-connected photovoltaic generator for harmonic and reactive power compensation with battery energy storage device

2016 ◽  
Vol 39 (7) ◽  
pp. 1071-1080
Author(s):  
Maheswar P Behera ◽  
Pravat K Ray
Keyword(s):  
Energy Storage ◽  
Reactive Power ◽  
Voltage Source ◽  
Storage Device ◽  
Voltage Source Converter ◽  
Radiation Level ◽  
Battery Energy Storage ◽  
Three Phase ◽  
Dc Bus ◽  
Battery Energy

This paper presents a photovoltaic (PV) generator along with a battery energy storage system connected in series with a three-phase grid. The objective of the proposed system is to provide uninterruptable compensation to the series-connected grid and non-linear load during strong sunlight as well as at night or in cloudy conditions. The interface between the grid and the PV is carried out through a voltage source converter (VSC), eliminating both the current and voltage harmonics and compensating the reactive power. The DC voltage control of the DC bus capacitor is employed in order to maintain unity power factor operation of the system, irrespective of changes in solar radiation level or due to change in load. Another control scheme is implemented to charge and discharge the connected battery whenever the sun goes out, to meet the DC bus voltage requirement of the VSC through a bidirectional DC-DC converter.

Multilevel Inverter Based DSTATCOM with Energy Storage Device

2011 ◽  
Vol 55-57 ◽  
pp. 1361-1364
Author(s):  
Jun Li Zhang ◽  
Xiao Feng Lv ◽  
Chao Li
Keyword(s):  
Energy Storage ◽  
Power Flow ◽  
Reactive Power ◽  
Power Transmission ◽  
Electronic Device ◽  
Multilevel Inverter ◽  
Voltage Source ◽  
Storage Device ◽  
Energy Storage Device ◽  
Reactive Power Flow

With the growth of industry manufacturers and population, power quality becomes more and more important issue, and is attracting significant attention due to the increase in the number of sensitive loads. A distribution static compensator (DSTATCOM) is a voltage source inverter (VS1)-based power electronic device, which is usually used to compensate reactive power and sustain the system voltage in distribution power system. Compared with the traditional STATCOM, multilevel STATCOMs exhibit faster dynamic response, smaller volume, lower cost, and higher ratings. A multilevel inverter connected to an energy storage device can control both active and reactive power flow, providing more flexible and versatile power transmission operation. SPWM is actually a kind of multi-pulse trigger mode and used to trigger the switches in DSTATCOM.

Modeling and Simulation of Superconducting Magnetic Energy Storage Systems

2015 ◽  
Vol 6 (3) ◽  
pp. 524 ◽  
Author(s):  
Ashwin Kumar Sahoo ◽  
Nalinikanta Mohanty ◽  
Anupriya M
Keyword(s):  
Energy Storage ◽  
Modeling And Simulation ◽  
Reactive Power ◽  
Magnetic Energy ◽  
Voltage Source ◽  
Voltage Source Converter ◽  
Power Conditioning ◽  
Superconducting Magnetic Energy Storage ◽  
Pulse Converter ◽  
Magnetic Energy Storage

This paper aims to model the Superconducting Magnetic Energy Storage System (SMES) using various Power Conditioning Systems (PCS) such as, Thyristor based PCS (Six-pulse converter and Twelve-pulse converter) and Voltage Source Converter (VSC) based PCS. Modeling and Simulation of Thyristor based PCS and VSC based PCS has been carried out. Comparison has also been carried out based on various criteria such as Total Harmonic Distortion (THD), active and reactive power control ability, control structure and power handling capacity. MATLAB/Simulink is used to simulate the various Power Conditioning Systems of SMES.

Stabilization of Power System Including Wind Farm by PWM Voltage Source Converter and Chopper Controlled SMES

2012 ◽  
Author(s):  
Md. Shamim Anower ◽  
Md. Rafiqul Islam Sheikh
Keyword(s):  
Energy Storage ◽  
Power System ◽  
Control Strategy ◽  
Wind Farm ◽  
Magnetic Energy ◽  
Voltage Source ◽  
Voltage Source Converter ◽  
Superconducting Magnetic Energy Storage ◽  
Terminal Voltage ◽  
Magnetic Energy Storage

This paper presents a dynamic model of Superconducting Magnetic Energy Storage (SMES) device developed, which can significantly decrease the voltage and power fluctuations of grid connected fixed speed wind generators. The SMES system with a voltage–source IGBT converter and two–quadrant DC–DC chopper is analyzed as a controllable energy source. The objective of the proposed SMES control strategy is to smooth the wind farm output by absorbing or providing real power. Moreover, its reactive power output can also be controlled to keep the wind farm terminal voltage constant. The control methodology of SMES system is suitable for the two objectives stated above. The performance of the proposed system is evaluated by dynamic simulations using a test power system. Real wind speed data is used in the simulation analyses, which validates the effectiveness of the proposed control strategy. Simulation results clearly show that the proposed control strategy can smooth well the wind generator output power and also maintain the terminal voltage at rated level. Key words: Minimization of fluctuations; superconducting magnetic energy storage (SMES); wind generator stabilization; voltage source converter (VSC); DC–DC chopper

Simulated Onshore-Fault Ride through of Offshore Wind Farms Connected through VSC HVDC

2008 ◽  
Vol 32 (2) ◽  
pp. 103-113 ◽  
Author(s):  
A. Arulampalam ◽  
G. Ramtharan ◽  
N. Caliao ◽  
J.B. Ekanayake ◽  
N. Jenkins
Keyword(s):  
Wind Farm ◽  
Reactive Power ◽  
Wind Farms ◽  
Offshore Wind ◽  
Voltage Source ◽  
Voltage Source Converter ◽  
Offshore Wind Farm ◽  
Offshore Wind Farms ◽  
Grid Connection ◽  
Fault Ride Through

Effective Onshore-Fault Ride Through was demonstrated by simulation for a Fixed Speed Induction Generator (FSIG) offshore wind farm connected through a Voltage Source Converter HVDC link. When a terrestrial grid fault occurs, power through the onshore converter reduces and the DC link voltage increases. A control system was then used to block the offshore converter. The offshore AC network voltage was reduced to achieve rapid power rejection. Reactive power at the onshore converter was controlled to support the AC network voltage according to the GB Grid Code requirements. Two cases, a 200 ms terrestrial fault and a 50% retained voltage fault of duration 710 ms, at the grid connection point were studied. The simulation results show that power blocking at the offshore converter was effective and the DC link voltage was controlled.

scholarly journals Multi-Terminal DC Grid with Wind Power Injection

Wind ◽  
2022 ◽  
Vol 2 (1) ◽  
pp. 17-36
Author(s):  
Lilantha Samaranayake ◽  
Carlos E. Ugalde-Loo ◽  
Oluwole D. Adeuyi ◽  
John Licari ◽  
Janaka B. Ekanayake
Keyword(s):  
Wind Farm ◽  
Reactive Power ◽  
Dynamic Responses ◽  
Offshore Wind ◽  
Voltage Source ◽  
Voltage Source Converter ◽  
Power Injection ◽  
Power Frequency ◽  
Cross Country ◽  
Real Time Digital Simulator

With the development of offshore wind generation, the interest in cross-country connections is also increasing, which requires models to study their complex static and dynamic behaviors. This paper presents the mathematical modeling of an offshore wind farm integrated into a cross-country HVDC network forming a multi-terminal high-voltage DC (MTDC) network. The voltage source converter models were added with the control of active power, reactive power, frequency, and DC link voltages at appropriate nodes in the MTDC, resembling a typical cross-country multi-terminal type of HVDC scenario. The mathematical model for the network together with the controllers were simulated in MATLABTM and experimentally verified using a real-time digital simulator hardware setup. The resulting static and dynamic responses from the hardware setup agreed well with those from simulations of the developed models.

Implementation of Wind Energy System Using Interleaved Boost Converter and Static Synchronous Compensator

2020 ◽  
Vol 17 (12) ◽  
pp. 5307-5314
Author(s):  
L. Sarojini ◽  
R. Supraja ◽  
V. Hamsadhwani ◽  
M. Sathiskumar
Keyword(s):  
Energy Storage ◽  
Wind Energy ◽  
Wind Power ◽  
Wind Farm ◽  
Reactive Power ◽  
Wind Farms ◽  
Energy System ◽  
Storage Device ◽  
Power Fluctuation ◽  
Static Synchronous Compensator

Limited fossil fuel resources and current environmental considerations have created wind energy as the best alternative for spotless renewable source of energy, to replace the conventional sources of energy. The Wind power production has quite a few drawbacks owing in the direction of the methods used in harnessing wind energy. This paper focuses on the method that decreases the effect of the voltage variability within the grid initiated through uncontrollable imprudent power flow and the output power fluctuation within the grid. This paper gives solution to diminish the fluctuation that creates unstable voltage across the line by installing such an energy storage device. Reactive power compensation has been mutually implemented to manage the distribution of the reactive power supply across wind farm based power networking through internal Static Synchronous Compensator (STATCOM). Here, bidirectional interleaved DC/DC-converters and double layer electrical capacitors are used. Therefore the introduction of two different systems, the energy storage systems with interleaved boost unit along with the reactive power mitigation for giant wind farms was implemented by integrating them into single system to check and review the wind power plant stability management.

scholarly journals Distribution system power quality compensation using a HSeAPF based on SRF and SMC features

2021 ◽  
Author(s):  
Akram Qashou ◽  
Sufian Yousef ◽  
Abdallah A. Smadi ◽  
Amani A. AlOmari
Keyword(s):  
Power Distribution ◽  
Distribution System ◽  
Reactive Power ◽  
Sliding Mode ◽  
Distribution Network ◽  
Harmonic Distortion ◽  
Phase Locked Loop ◽  
Voltage Source ◽  
Voltage Source Converter ◽  
Non Linear

AbstractThe purpose of this paper is to describe the design of a Hybrid Series Active Power Filter (HSeAPF) system to improve the quality of power on three-phase power distribution grids. The system controls are comprise of Pulse Width Modulation (PWM) based on the Synchronous Reference Frame (SRF) theory, and supported by Phase Locked Loop (PLL) for generating the switching pulses to control a Voltage Source Converter (VSC). The DC link voltage is controlled by Non-Linear Sliding Mode Control (SMC) for faster response and to ensure that it is maintained at a constant value. When this voltage is compared with Proportional Integral (PI), then the improvements made can be shown. The function of HSeAPF control is to eliminate voltage fluctuations, voltage swell/sag, and prevent voltage/current harmonics are produced by both non-linear loads and small inverters connected to the distribution network. A digital Phase Locked Loop that generates frequencies and an oscillating phase-locked output signal controls the voltage. The results from the simulation indicate that the HSeAPF can effectively suppress the dynamic and harmonic reactive power compensation system. Also, the distribution network has a low Total Harmonic Distortion (< 5%), demonstrating that the designed system is efficient, which is an essential requirement when it comes to the IEEE-519 and IEC 61,000–3-6 standards.

scholarly journals Nyström Minimum Kernel Risk-Sensitive Loss Based Seamless Control of Grid-Tied PV-Hybrid Energy Storage System

Energies ◽  
2021 ◽  
Vol 14 (5) ◽  
pp. 1365
Author(s):  
Mukul Chankaya ◽  
Ikhlaq Hussain ◽  
Aijaz Ahmad ◽  
Irfan Khan ◽  
S.M. Muyeen
Keyword(s):  
Energy Storage ◽  
Reactive Power ◽  
Storage System ◽  
Energy Storage System ◽  
Voltage Source ◽  
Grid Voltage ◽  
Hybrid Energy ◽  
Hybrid Energy Storage ◽  
Hybrid Energy Storage System ◽  
Risk Sensitive

This paper presents Nyström minimum kernel risk-sensitive loss (NysMKRSL) based control of a three-phase four-wire grid-tied dual-stage PV-hybrid energy storage system, under varying conditions such as irradiation variation, unbalanced load, and abnormal grid voltage. The Voltage Source Converter (VSC) control enables the system to perform multifunctional operations such as reactive power compensation, load balancing, power balancing, and harmonics elimination while maintaining Unity Power Factor (UPF). The proposed VSC control delivers more accurate weights with fewer oscillations, hence reducing overall losses and providing better stability to the system. The seamless control with the Hybrid Energy Storage System (HESS) facilitates the system’s grid-tied and isolated operation. The HESS includes the battery, fuel cell, and ultra-capacitor to accomplish the peak shaving, managing the disturbances of sudden and prolonged nature occurring due to load unbalancing and abnormal grid voltage. The DC link voltage is regulated by tuning the PI controller gains utilizing the Salp Swarm Optimization (SSO) algorithm to stabilize the system with minimum deviation from the reference voltage, during various simulated dynamic conditions. The optimized DC bus control generates the accurate loss component of current, which further enhances the performance of the proposed VSC control. The presented system was simulated in the MATLAB 2016a environment and performed satisfactorily as per IEEE 519 standards.

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