Optimal control strategy for PMSG wind power system to restrain the oscillation of dc voltage and transmission power under asymmetrical grid fault

2015 ◽  
Author(s):  
Dan Wang ◽  
Chongru Liu ◽  
Gengyin Li
Keyword(s):  
Optimal Control ◽  
Power System ◽  
Wind Power ◽  
Control Strategy ◽  
Transmission Power ◽  
Optimal Control Strategy ◽  
Dc Voltage ◽  
Wind Power System

Study on Transient Stability of Circulation Economy Power System with High Penetration of Wind Power

2014 ◽  
Vol 1008-1009 ◽  
pp. 197-201
Author(s):  
Jian Ping Liu ◽  
Chun Liu ◽  
Ting Rui Lu ◽  
Hai Yan Tang ◽  
Xin Shou Tian ◽  
...  
Keyword(s):  
Optimal Control ◽  
Power System ◽  
Wind Turbine ◽  
Wind Power ◽  
Control Strategy ◽  
Transient Stability ◽  
Power Grid ◽  
Demonstration Project ◽  
Optimal Control Strategy ◽  
High Penetration

On the basic of deeply analyzing the characteristic of circulation economy power system with high penetration of wind power, and researching the model and transient characteristics of DFIG, the problem on transient stability of circulation economy power grid was given through simulating and analyzing the huolinhe circulation economy demonstration project on wind power consumed in the local in the paper. At last, an optimal control strategy of wind turbine based on circulation economy power system with high penetration of wind power was proposed.

Research on Passivity-Based ADRC of Direct-Drive Wind Power System Back to Back PWM Converter

2013 ◽  
Vol 457-458 ◽  
pp. 1363-1370
Author(s):  
Xian Qin Ma ◽  
Jiu He Wang
Keyword(s):  
Power System ◽  
Wind Power ◽  
Hybrid Control ◽  
Direct Drive ◽  
Pwm Rectifier ◽  
Pwm Inverter ◽  
Dc Voltage ◽  
Load Disturbance ◽  
Wind Power System ◽  
Grid Side

In order to improve the performance of the converter for restrain the machine-side PWM rectifier load disturbance impact on the output DC voltage in direct-drive wind power system. A hybrid control strategy based on ADRC and the EL model was presented, using ESO to observe and compensate the load disturbances, achieving voltage outer control by ADRC method and comparing with PI control. However, as to grid-side PWM inverter, energy shaping method which based on PCHD model and the IDA-PBC control algorithm is adopted to design passivity-based controller, which is able to make the energy function have the minimum value when inverter is at the desired point, thus improving the stability and the load disturbance-rejection ability for the inverter. Simulation results show that the machine-side PWM rectifier can make the currents and voltages of AC side achieve synchronous, DC voltage can fast-track desired values; grid-side PWM inverter can achieve unity power factor and make the AC current sinusoidal.

scholarly journals Recurrence of Sub-Synchronous Oscillation Accident of Hornsea Wind Farm in UK and Its Suppression Strategy

Energies ◽  
2021 ◽  
Vol 14 (22) ◽  
pp. 7685
Author(s):  
Xiangwu Yan ◽  
Wenfei Chang ◽  
Sen Cui ◽  
Aazim Rassol ◽  
Jiaoxin Jia ◽  
...  
Keyword(s):  
Power System ◽  
Wind Power ◽  
Control Strategy ◽  
Wind Farm ◽  
Induction Generator ◽  
Doubly Fed Induction Generator ◽  
Synchronous Oscillation ◽  
Wind Power System ◽  
Doubly Fed ◽  
Grid Side

A large-scale power system breakdown in the United Kingdom caused blackouts in several important cities, losing about 3.2 percent of the load and affecting nearly 1 million power users on 9 August 2019. On the basis of the accident investigation report provided by the UK National Grid, the specific reasons for the sub-synchronous oscillation of Hornsea wind farm were analyzed. The Hornsea wind power system model was established by MATLAB simulation software to reproduce the accident. To solve this problem, based on the positive and negative sequence decomposition, the control strategy of grid-side converter of doubly-fed induction generator is improved to control the positive sequence voltage of the generator terminal, which can quickly recover the voltage by compensating the reactive power at the grid side. Consequently, the influence of the fault is weakened on the Hornsea wind farm system, and the sub-synchronous oscillation of the system is suppressed. The simulation results verify the effectiveness of the proposed control strategy in suppressing the sub-synchronous oscillation of weak AC wind power system after being applied to doubly-fed induction generator, which serves as a reference for studying similar problems of offshore wind power.

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