Study on Loss Reduction of Large Scale Wind Power Concentrated Integration on Power System

2013 ◽  
Vol 380-384 ◽  
pp. 3051-3056 ◽  
Author(s):  
Xiao Dan Wu ◽  
Wen Ying Liu
Keyword(s):  
Power System ◽  
Wind Power ◽  
Power Loss ◽  
Large Scale ◽  
Wind Farm ◽  
Reactive Power ◽  
Low Voltage ◽  
Main Step ◽  
Loss Reduction ◽  
Wind Generators

In this paper, starting from the active network loss formulas and wind characteristics, it is pointed out the reactive power loss and reactive flow is the major impact of wind power integration on power system loss. The reactive power loss formulas of box-type transformer, main step-up transformer, wind farm collector line and connecting grid line are analyzed. Next the reactive power loss of transformer and transmission line is described in detail. Then put forward the loss reduction measures that installing SVC on the low voltage side of the main step-up transformer and making the doubly-fed wind generators send out some reactive power at an allowed power factor. Use the case of Gansu Qiaodong wind farm to verify the effectiveness of the proposed measures.

The Impact of Large Scale Wind Power Integration on a Regional Power Grid - A Case Study

2014 ◽  
Vol 472 ◽  
pp. 219-225
Author(s):  
Hui Ren ◽  
Dan Xia Yang ◽  
David Watts ◽  
Xi Chen
Keyword(s):  
Power System ◽  
Wind Energy ◽  
Wind Power ◽  
Large Scale ◽  
Wind Farm ◽  
Reactive Power ◽  
Energy Integration ◽  
Wind Power Integration ◽  
Wind Energy Integration ◽  
The Impact

Renewable Energy especially wind energy integration has attained profound growth across the worldwide power system. Wind energy integration at large scale comes up with the challenge on voltages and reactive power management at power system level. The research work presented in this paper has analyzed the impact of wind energy on reactive power reserve with special reference to Hebei Southern Power System. The maximum wind power integration capacity is calculated, and the effect of increasing wind power integration on voltage profiles is studied. Possible controls from system sides and its effects on wind power integration are explored. Study shows that with the increase of the wind power integration capacity, the intermittency and variation will bring more serious problems to the system frequency regulation, reserve service and voltage control. These problems also become the limiting factors for further increase of large-scale wind power integration. In order to make a better use of wind power resources in Heibei province and maintain system safety at the same time, further research should be performed on exploring the reactive and active power regulation and control of the wind farm and the methods to decrease the variability of wind farm outputs.

Summary and Analysis on the Low Voltage Ride through Reformation of the Wind Power Turbine

2012 ◽  
Vol 608-609 ◽  
pp. 781-784
Author(s):  
Gui Xin Hou ◽  
Qi Hui Liu ◽  
Fang Yu ◽  
Ying Li
Keyword(s):  
Power System ◽  
Wind Power ◽  
Large Scale ◽  
Wind Farm ◽  
Low Voltage ◽  
Low Voltage Ride Through ◽  
Power Turbine ◽  
Wind Power System ◽  
The Stability ◽  
Power Capability

As the increasing of the wind power capability， in order to ensure the stability of the grid while the voltage dips， the LVRT ability of the wind power turbine has become necessary. Realizing LVRT， is not only the question the built and will build wind power system are facing, but also the challenge of the will build and operating ones. Actually, many connected operating wind power system can’t meet the LVRT, this is why the large scale wind power off-grid events happened frequently, so the reformation of the wind power system LVRT is an emergency question to be solved. This paper introduced the main methods for LVRT reformation, based on this, some LVRT reform equipment was summarized for the wind turbine; and further, some reform methods were introduced for wind farm.

The Influence on Reactive Voltage of Large Scale Wind Power Connected to Grid

2013 ◽  
Vol 380-384 ◽  
pp. 2972-2976
Author(s):  
Xiang Yu Lv ◽  
Tian Dong ◽  
Ye Yuan ◽  
De Xin Li ◽  
Xiao Juan Han
Keyword(s):  
Power System ◽  
Wind Power ◽  
Influencing Factors ◽  
Large Scale ◽  
Reactive Power ◽  
Wind Power Integration ◽  
Power Fluctuations ◽  
The Impact

Large scale wind power integration has influenced the safety of power system. Taking wind power integration in Jilin as example, the paper describes the influencing factors of large scale wind power integration on reactive power of the grid in detail firstly, then analyze the reactive voltage in four typical ways, and discuss the impact of the wind power fluctuations on the grid reactive voltage.

Preliminary Study on the Influence of Wind Power on Low-Frequency Oscillation under Outward Transmitting Thermal Generated Power Bundled with Wind Power Typical Scene

2013 ◽  
Vol 391 ◽  
pp. 271-276
Author(s):  
Peng Li ◽  
Ning Bo Wang ◽  
De Zhi Chen ◽  
Xiao Rong Zhu ◽  
Yun Ting Song
Keyword(s):  
Power Systems ◽  
Power System ◽  
Wind Power ◽  
Wind Farm ◽  
Reactive Power ◽  
Simulation Analysis ◽  
Low Frequency ◽  
Simulation Software ◽  
Frequency Oscillation ◽  
Low Frequency Oscillation

Increasing penetration level of wind power integration has a significant impact on low-frequency oscillations of power systems. Based on PSD-BPA simulation software, time domain simulation analysis and eigenvalue analysis are employed to investigate its effect on power system low-frequency oscillation characteristic in an outward transmitting thermal generated power bundled with wind power illustrative power system. System damping enhances markedly and the risk of low-frequency oscillation reduce when the generation of wind farm increase. In addition, dynamic reactive power compensations apply to wind farm, and the simulation result indicates that it can improve dynamic stability and enhance the system damping.

Study of Influence on Power System Voltage Stability of Wind Farm Power Output Fluctuation

2013 ◽  
Vol 694-697 ◽  
pp. 846-849
Author(s):  
Jian Yuan Xu ◽  
Wei Fu Qi ◽  
Yun Teng
Keyword(s):  
Power System ◽  
Wind Power ◽  
Power Output ◽  
Voltage Stability ◽  
Wind Farm ◽  
Reactive Power ◽  
Simulation Analysis ◽  
Power Grid ◽  
Reactive Power Compensation ◽  
Grid Integration

This paper mainly studies wind power fluctuations how to affect voltage stability after the wind power grid integration, and reactive power compensation equipment on improving effect. In certain parts of the wind farm, for example, firstly, analyzing the wind farm reactive power problems. Then introduce the reactive power compensation equipment that used in the wind farm. Finally, with PSCAD software, making a simulation analysis about the influence on the power grid voltage according to adopting the different reactive power compensation devices or not.

scholarly journals Improving Low Voltage Ride Through Capability of Wind Generators Using Dynamic Voltage Restorer

2014 ◽  
Vol 65 (4) ◽  
pp. 235-241 ◽  
Author(s):  
Gangatharan Sivasankar ◽  
Velu Suresh Kumar
Keyword(s):  
Wind Power ◽  
Wind Farm ◽  
Low Voltage ◽  
Stable Operation ◽  
Dynamic Voltage Restorer ◽  
Wind Power Integration ◽  
Wind Generators ◽  
Voltage Dip ◽  
Voltage Controller ◽  
Dynamic Voltage

Abstract The increasing wind power integration with power grid has forced the situation to improve the reliability of wind generators for stable operation. One important problem with induction generator based wind farm is its low ride through capability to the grid voltage disturbance. Any disturbance such as voltage dip may cause wind farm outages. Since wind power contribution is in predominant percentage, such outages may lead to stability problem. The proposed strategy is to use dynamic voltage controller (DVR) to compensate the voltage disturbance. The DVR provides the wind generator the ability to remain connected in grid and improve the reliability. The voltage dips due to symmetrical and unsymmetrical faults are considered for analysis. The vector control scheme is employed for fault compensation which uses software phase locked loop scheme and park dq0 transformation technique. Extensive simulation results are included to illustrate the control and operation of DVR.

Using Dynamic Reactive Power Compensation Equipments to Enhance Low Voltage Ride-Through Capability of Fixed Speed Asynchronous Wind Farms

2013 ◽  
Vol 291-294 ◽  
pp. 481-489 ◽  
Author(s):  
Yu Lin Hu ◽  
Lei Shi ◽  
Hao Ming Liu
Keyword(s):  
Wind Farm ◽  
Reactive Power ◽  
Low Voltage ◽  
Wind Farms ◽  
Reactive Power Compensation ◽  
Mass Model ◽  
Static Synchronous Compensator ◽  
Conversion Model ◽  
Low Voltage Ride Through ◽  
Wind Generators

This paper presents wind energy conversion model, drive shaft’s dual-mass model and generator’s transient mathematical model for the transient analysis of fixed speed asynchronous wind generators, and analyzes the transient characteristics of the wind generators under the condition of low voltage fault. The control principles of two dynamic reactive power compensation equipments as static var compensator (SVC) and static synchronous compensator (STATCOM) are introduced. Take a wind farm consists of fixed speed asynchronous wind generators as an example, the two compensation equipments are simulated in PowerFactory/DIgSILENT to compare the effort of them on enhancing the low voltage ride-through capability of the wind farm.

scholarly journals DFIG use with combined strategy in case of failure of wind farm

2020 ◽  
Vol 10 (3) ◽  
pp. 2221
Author(s):  
Azeddine Loulijat ◽  
Najib Ababssi ◽  
Mohammed Makhad
Keyword(s):  
Wind Power ◽  
Wind Turbines ◽  
Wind Farm ◽  
Reactive Power ◽  
Low Voltage ◽  
Voltage Drop ◽  
Optimal Solution ◽  
Wind Farms ◽  
Electrical Networks ◽  
Constant Frequency

In the wind power area, Doubly Fed Induction Generator (DFIG) has many advantages due to its ability to provide power to voltage and constant frequency during rotor speed changes, which provides better wind capture as compared to fixed speed wind turbines (WTs). The high sensitivity of the DFIG towards electrical faults brings up many challenges in terms of compliance with requirements imposed by the operators of electrical networks. Indeed, in case of a fault in the network, wind power stations are switched off automatically to avoid damage in wind turbines, but now the network connection requirements impose stricter regulations on wind farms in particular in terms of Low Voltage Ride through (LVRT), and network support capabilities. In order to comply with these codes, it is crucial for wind turbines to redesign advanced control, for which wind turbines must, when detecting an abnormal voltage, stay connected to provide reactive power ensuring a safe and reliable operation of the network during and after the fault. The objective of this work is to offer solutions that enable wind turbines remain connected generators, after such a significant voltage drop. We managed to make an improvement of classical control, whose effectiveness has been verified for low voltage dips. For voltage descents, we proposed protection devices as the Stator Damping Resistance (SDR) and the CROWBAR. Finally, we developed a strategy of combining the solutions, and depending on the depth of the sag, the choice of the optimal solution is performed.

scholarly journals Hybrid PSO-Optimized ANFIS-Based Model to Improve Dynamic Voltage Stability

2019 ◽  
Vol 9 (4) ◽  
pp. 4384-4388 ◽  
Author(s):  
D. N. Truong ◽  
V. T. Bui
Keyword(s):  
Power System ◽  
Wind Power ◽  
Voltage Stability ◽  
Wind Farm ◽  
Reactive Power ◽  
Voltage Response ◽  
Inference System ◽  
Dynamic Voltage ◽  
Dynamic Voltage Stability ◽  
Wind Power System

The objective of this paper is to perform a hybrid design for an Adaptive Neuro-Fuzzy Inference System (ANFIS) optimized by Particle Swarm Optimization (PSO) to improve the dynamic voltage stability of a grid-connected wind power system. An onshore 99.2MW wind farm using Doubly Fed Induction Generator (DFIG) is studied. To compensate the reactive power absorbed from the power grid of the wind farm, a Static VAR Compensator (SVC) is proposed. To demonstrate the performance of the proposed hybrid PSO–ANFIS controller, simulations of the voltage response in time-domain are performed in Matlab to evaluate the effectiveness of the designed controller. From the results, it can be concluded that the proposed hybrid PSO-optimized ANFIS-based model can be applied to enhance the dynamic voltage stability of the studied grid-connected wind power system.

Effect of Fluctuation of Wind Power Output on Power System Risk

2014 ◽  
Vol 513-517 ◽  
pp. 2971-2974
Author(s):  
Jian Liu ◽  
Ying Wei Song ◽  
Yan Liu ◽  
Hui Lan Jiang ◽  
Shuang Qi Zheng
Keyword(s):  
Power System ◽  
Wind Power ◽  
Large Scale ◽  
System Analysis ◽  
Low Voltage ◽  
Power Grid ◽  
Risk Index ◽  
Great Influence ◽  
Power Fluctuation ◽  
System Risk

With expansion of the scale of wind power used in grid, its impact on the power grid has become more and more apparent. Because of its characteristics of intermittency and randomness, it is necessary to study the effect of wind power fluctuation on power system risk. The large scale wind power farm is connected to the power grid, the influence of its output fluctuation on static security of power grids is studied in this paper, and corresponding evaluation risk index of the power grid security is built. A new type of power system analysis software (PSAT) is used for the simulation analysis, and the results show that output fluctuation of wind power has great influence on low voltage and overload risk of power system.

Sign in / Sign up

Export Citation Format

Share Document