scholarly journals Fault Ride Through Capability Enhancement of Permanent Magnet Synchronous Generator-based Wind Energy Conversion System

2021 ◽  
Vol 23 (09) ◽  
pp. 1135-1154
Author(s):  
Walid S. E. Abdellatif ◽  
◽  
Noura A. Nour Aldin ◽  
Ahmed M. Azmy ◽  
Ahmed A. Salem ◽  
...  
Keyword(s):  
Wind Energy ◽  
Permanent Magnet ◽  
Low Voltage ◽  
Negative Impact ◽  
Storage System ◽  
Synchronous Generator ◽  
Energy Storage System ◽  
Electrical Network ◽  
Permanent Magnet Synchronous Generator ◽  
Wind Generators

With the speedy increase of wind energy in electric networks, many important issues could emerge, where the most important matter is to maintain the connection of wind generators during fault conditions. With different faults in the electrical network, the voltage at the point of common coupling (PCC) decreases causing unwanted transients in the stator currents. This results in substantially increased fluctuations in the DC-link voltage (Vdc). To avoid this negative impact, it is a must to maintain the capability of wind generators to continue linked to the network during faults, which is depicted as low voltage ride through (LVRT) capability. This paper investigates the LVRT enhancement by two techniques, the first is based on Braking Chopper (BC) and the second method is based on electrical double-layer capacitors (EDLC), or Supercapacitor Energy Storage System (SCESS), under abnormal conditions. The full model of the permanent magnet synchronous generator (PMSG) system and FRT technique are performed in MATLAB/Simulink platform. As a consequence of the findings, both the BC and SCESS are capable to provide satisfactory performance with superior FRT capability for the SCESS compared to the BC.

scholarly journals Coordinated LVRT Control for a Permanent Magnet Synchronous Generator Wind Turbine with Energy Storage System

2020 ◽  
Vol 10 (9) ◽  
pp. 3085 ◽  
Author(s):  
Chunghun Kim ◽  
Yonghao Gui ◽  
Haoran Zhao ◽  
Wonhee Kim
Keyword(s):  
Energy Storage ◽  
Permanent Magnet ◽  
Control Method ◽  
Storage System ◽  
Synchronous Generator ◽  
Energy Storage System ◽  
High Wind ◽  
Permanent Magnet Synchronous Generator ◽  
Wind Speeds ◽  
Additional Device

This study introduces a coordinated low-voltage ride through (LVRT) control method for permanent magnet synchronous generator (PMSG) wind turbines (WT) interconnected with an energy storage system (ESS). In the proposed method, both the WT pitch and power converters are controlled to enhance the LVRT response. Moreover, the ESS helps in regulating the dc link voltage during a grid fault. Previous LVRT methods can be categorized into strategies with or without an additional device for the LVRT. The latter scheme is advantageous from the perspective of no additional installation cost; in this case, pitch and converter controllers are used. Meanwhile, the former method uses an additional device for LVRT operation and hence, involves additional expense. However, it can effectively enhance the LVRT response by reducing the LVRT burden on the WT. Moreover, the additional device can be used for various WT power control applications and it is common that the ESS is interconnected to the WT for multiple objectives. Previous studies focused on these two aspects separately; hence, a method of coordinated control for an ESS and a WT is needed as more ESSs are required to connect to WTs for flexible wind power operation. The proposed method introduces a control method with different LVRT modes considering the ESS state of charge (SoC). When the WT does not have a sufficient inertial response operation range, the ESS reserve energy capacity is required for LVRT operation. This coordinated LVRT method employs both the WT and ESS controls when it is hard to handle the LVRT using the WT control alone at high wind speeds. In this case, power curve analysis is used to obtain the appropriate power reference during the fault period. In addition, a power reference is also used to ensure a safe operation. Using the proposed method, an ESS can be operated in a manner that is appropriate for WT operation, especially at high wind speeds. To validate the effectiveness of the proposed method, we considered two case studies. One study compares the LVRT response between the WT itself and the proposed method. The other research work compares the response of the conventional LVRT method that uses a WT and an ESS and with that of the proposed method. From these case studies, we concluded that the proposed method achieved a better performance while operating within the constraints of the WT rotor speed and ESS SoC limits.

scholarly journals Grid integration of PMSG based wind energy conversion with battery storage system

2021 ◽  
Vol 10 (1) ◽  
pp. 48
Author(s):  
Venkatachalam K M ◽  
V. Saravanan
Keyword(s):  
Wind Energy ◽  
Energy Conversion ◽  
Permanent Magnet ◽  
Single Phase ◽  
Storage System ◽  
Synchronous Generator ◽  
Voltage Source ◽  
Permanent Magnet Synchronous Generator ◽  
Wind Energy Conversion ◽  
Battery Bank

In this paper, the design and implementation of a permanent magnet synchronous generator (PMSG) based wind energy conversion system and battery bank storages are connected to utility grid. It has phase locked loop (PLL) control strategy as it provides for control single-phase grid connected inverter with constant dc-link voltage. The dc-link is interfaced to a permanent magnet synchronous generator through diode bridge rectifier (DBR) with dc-dc boost converter, battery bank and single phase voltage source inverter (VSI).The dc-link voltage is maintained constant value of 48 V by controlling dc-dc converter with help of perturb and observe (P&O) algorithm based maximum power point tracker (MPPT). The VSI output voltage and frequency values are controlled based on grid parameters using PI controller and sinusoidal pulse width modulation (SPWM) technique. In this grid connected system is simulated and performances are analyzed through MATLAB software. The prototype experimental results are verified through 1 kW PMSG, 48 V battery bank with single phase grid connected system.

scholarly journals Fault Characteristic and Low Voltage Ride-Through Requirements Applicability Analysis for a Permanent Magnet Synchronous Generator-Based Wind Farm

Energies ◽  
2019 ◽  
Vol 12 (17) ◽  
pp. 3400 ◽  
Author(s):  
Chen ◽  
Zheng ◽  
Han
Keyword(s):  
Wind Energy ◽  
Permanent Magnet ◽  
Wind Farm ◽  
Low Voltage ◽  
Synchronous Generator ◽  
Permanent Magnet Synchronous Generator ◽  
Low Voltage Ride Through ◽  
Characteristics Analysis ◽  
The Impact ◽  
Fault Characteristic

As the penetration of wind energy is being dramatically increased, the impact of wind energy on the power system should be roundly studied, especially for the fault characteristics analysis and applicability analysis of low voltage ride-through (LVRT) requirements for a whole wind farm (WF) and an individual wind turbine generator (WTG). This paper firstly describes a detailed modeling of a permanent magnet synchronous generator (PMSG)-based WF and analyzes the fault characteristics of the WF under various fault conditions. The validation of the fault characteristics analysis is carried out with the EMTP-RV generated data, with the consideration of different fault positions, fault types, and wind speeds. The relay protection and the related grid code are also taken into account. In addition, the applicability analysis of LVRT requirements for a WF and a WTG is also implemented, from the points of minimal grid-connection time and minimal dynamic reactive current support ability. The fault characteristic analysis of a PMSG-based WF could be helpful for developing new control or protection methods for a PMSG-based WF. Meanwhile, the applicability analysis of LVRT requirements could serve as a reference for WTG manufacturers, WF administrators, and grid operator.

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