Research on Coordinated Control of Reactive Power and Voltage in Large Scale Wind Farm Groups

2013 ◽  
Vol 433-435 ◽  
pp. 1330-1335 ◽  
Author(s):  
Zhen Yu Xu ◽  
Bin Meng ◽  
Jian He ◽  
Shao Hua Jiao
Keyword(s):  
Power Flow ◽  
Large Scale ◽  
Wind Farm ◽  
Reactive Power ◽  
Wind Farms ◽  
Voltage Sensitivity ◽  
Voltage Level ◽  
Grid Voltage ◽  
Power Resources ◽  
Reactive Power Flow

Under the influence of the view that reactive power compensation on-spot, the study on control of reactive power and voltage in wind farms focused on a single wind farm optimal reactive voltage control. China's wind power resources are relatively concentrated and a region often have several or even a dozen wind farms. Wind farm thought as a unit to adjust often leads to irrational reactive power flow. Wind farm groups and collection substations must be thought together as a whole to manage. This paper makes use of collection substations to support area voltage, coordinates reactive power output of the wind farm groups based on the voltage sensitivity and improves the overall grid voltage level of the wind farm groups areas. Simulation results proved that the program can improve the regional power grid voltage level.

Improving Active Output Capacity of Large-Scale Wind Farm by Installation STATCOM

2012 ◽  
Vol 588-589 ◽  
pp. 574-577 ◽  
Author(s):  
Yan Juan Wu ◽  
Lin Chuan Li
Keyword(s):  
Control Strategy ◽  
Large Scale ◽  
Wind Farm ◽  
Transient Stability ◽  
Reactive Power ◽  
Feedforward Control ◽  
Wind Farms ◽  
Active Power ◽  
Utilization Efficiency ◽  
Grid Voltage

Some faults will result wind turbine generators off-grid due to low grid voltage , furthermore, large-scale wind farms tripping can result in severe system oscillation and aggravate system transient instability . In view of this, static compensator (STATCOM) is installed in the grid containing large-scale wind farm. A voltage feedforward control strategy is proposed to adjust the reactive power of STATCOM compensation and ensure that the grid voltage is quickly restored to a safe range. The mathematical model of the doubly-fed induction wind generator (DFIG) is proposed. The control strategy of DFIG uses PI control for rotor angular velocity and active power. 4-machine system simulation results show that the STATCOM reactive power compensation significantly improve output active power of large-scale wind farm satisfying transient stability, reduce the probability of the tripping, and improve the utilization efficiency of wind farms.

scholarly journals Reactive Power Optimal Control of a Wind Farm for Minimizing Collector System Losses

Energies ◽  
2018 ◽  
Vol 11 (11) ◽  
pp. 3177 ◽  
Author(s):  
Yunqi Xiao ◽  
Yi Wang ◽  
Yanping Sun
Keyword(s):  
Large Scale ◽  
Wind Farm ◽  
Energy Savings ◽  
Reactive Power ◽  
Voltage Control ◽  
Wind Farms ◽  
Voltage Sensitivity ◽  
Voltage Control Strategy ◽  
Power Sources ◽  
Collector System

A reactive power/voltage control strategy is proposed that uses wind turbines as distributed reactive power sources to optimize the power flow in large-scale wind farms and reduce the overall losses of the collector system. A mathematical model of loss optimization for the wind farm collector systems is proposed based on a reactive power/voltage sensitivity analysis; a genetic algorithm (GA) and particle swarm optimization (PSO) algorithm are used to validate the optimization performances. The simulation model is established based on a large-scale wind farm. The results of multiple scenarios show that the proposed strategy is superior to the traditional methods with regard to the reactive power/voltage control of the wind farm and the loss reduction of the collector system. Furthermore, the advantages in terms of annual energy savings and environmental protection are also estimated.

Effect of unified power flow controller installation in dual feed induction generator (DFIG) wind turbines

2021 ◽  
Vol 0 (0) ◽  
Author(s):  
Asaad Shemshadi ◽  
Pourya Khorampour
Keyword(s):  
Power Flow ◽  
Wind Farm ◽  
Reactive Power ◽  
Wind Farms ◽  
Transient Behavior ◽  
Unified Power Flow Controller ◽  
Voltage Fluctuations ◽  
Flow Controller ◽  
Power Flow Controller ◽  
Sudden Load

Abstract In recent years, the use of wind energy to generate electricity in the world has been accelerating and growing. Wind farms are unstable when dynamic voltage fluctuations occur, especially sudden and sudden changes in load, and show oscillating performance at their output. In this paper, the Unified Power Flow Controller (UPFC) has been simulated and studied by Matlab software to improve the dynamic stability and transient behavior of the wind power plant in the event of sudden load changes. The simulation results show that by controlling the UPFC series inverter, voltage fluctuations in the PCC bus are prevented and the UPFC parallel inverter injects power after changing the load for faster recovery and stability of the PCC bus voltage and thus the stability of the wind farm. The UPFC can control the active and reactive power at the transmission line, and in fact, controls the output of the wind turbine with the generator from both sides to the fluctuations caused by sudden load changes that play a role such as sudden disturbances and oscillating errors. Also, the presence of UPFC in the system reduces power fluctuations.

scholarly journals Behaviour of Distribution Grids with the Highest PV Share Using the Volt/Var Control Chain Strategy

Energies ◽  
2019 ◽  
Vol 12 (20) ◽  
pp. 3865 ◽  
Author(s):  
Daniel-Leon Schultis ◽  
Albana Ilo
Keyword(s):  
Power Flow ◽  
Large Scale ◽  
Reactive Power ◽  
Low Voltage ◽  
Information And Communications Technology ◽  
Optimal Arrangement ◽  
Reactive Power Flow ◽  
Voltage Limit ◽  
Scale Integration ◽  
Distribution Grids

The large-scale integration of rooftop PVs stalls due to the voltage limit violations they provoke, the uncontrolled reactive power flow in the superordinate grids and the information and communications technology (ICT) related challenges that arise in solving the voltage limit violation problem. This paper attempts to solve these issues using the LINK-based holistic architecture, which takes into account the behaviour of the entire power system, including customer plants. It focuses on the analysis of the behaviour of distribution grids with the highest PV share, leading to the determination of the structure of the Volt/var control chain. The voltage limit violations in low voltage grid and the ICT challenge are solved by using concentrated reactive devices at the end of low voltage feeders. Q-Autarkic customer plants relieve grids from the load-related reactive power. The optimal arrangement of the compensation devices is determined by a series of simulations. They are conducted in a common model of medium and low voltage grids. Results show that the best performance is achieved by placing compensation devices at the secondary side of the supplying transformer. The Volt/var control chain consists of two Volt/var secondary controls; one at medium voltage level (which also controls the TSO-DSO reactive power exchange), the other at the customer plant level.

scholarly journals Probabilistic Approach to Optimizing Active and Reactive Power Flow in Wind Farms Considering Wake Effects

Energies ◽  
2013 ◽  
Vol 6 (11) ◽  
pp. 5717-5737 ◽  
Author(s):  
Jae-Kun Lyu ◽  
Jae-Haeng Heo ◽  
Jong-Keun Park ◽  
Yong-Cheol Kang
Keyword(s):  
Power Flow ◽  
Reactive Power ◽  
Probabilistic Approach ◽  
Wind Farms ◽  
Active And Reactive Power ◽  
Reactive Power Flow ◽  
Wake Effects

Research on MCR Type Static Var Power Compensator Device in Wind Farms

2013 ◽  
Vol 433-435 ◽  
pp. 1325-1329
Author(s):  
Wei Zheng ◽  
Li Guang Shi ◽  
Shi Qun Li ◽  
Yong Zhi ◽  
Run Qing Bai ◽  
...  
Keyword(s):  
Large Scale ◽  
Wind Farm ◽  
Reactive Power ◽  
Power Transmission ◽  
Field Tests ◽  
Wind Farms ◽  
Facts Devices ◽  
Reactive Compensation ◽  
New Energy ◽  
Controllable Reactor

With the application of FACTS devices in large-scale new energy base, in the light of FACTS devices installed in each wind farm in Gansu Jiuquan, which can supply reactive compensation for the power transmission system and stable the grid voltage, in this paper the magnetic controllable reactor (MCR) type static var compensator (SVC) is studied deeply. The paper introduces the working principle and characteristics of the MCR-SVC. In connection with MCR equivalent circuit, the simulation model is built in MATLAB/SPS, the simulation results and field tests verify the reactive power compensation effect of MCR-SVC during wind farms.

scholarly journals Renewable Generation and Transmission Expansion Planning Coordination with Energy Storage System: A Flexibility Point of View

2021 ◽  
Vol 11 (8) ◽  
pp. 3303
Author(s):  
Mohammad Reza Ansari ◽  
Sasan Pirouzi ◽  
Mostafa Kazemi ◽  
Amirreza Naderipour ◽  
Mohamed Benbouzid
Keyword(s):  
Energy Storage ◽  
Power Flow ◽  
Wind Farm ◽  
Reactive Power ◽  
Wind Farms ◽  
Expansion Planning ◽  
Transmission Expansion Planning ◽  
Transmission Expansion ◽  
Ac Power ◽  
The Impact

This paper presents a method for coordinated network expansion planning (CNEP) in which the difference between the total cost and the flexibility benefit is minimized. In the proposed method, the generation expansion planning (GEP) of wind farms is coordinated with the transmission expansion planning (TEP) problem by using energy storage systems (ESSs) to improve network flexibility. To consider the impact of the reactive power in the CNEP problem, the AC power flow model is used. The CNEP constraints include the AC power flow equations, planning constraints of the different equipment, and the system operating limits. Therefore, this model imposes hard nonlinearity onto the problem, which is linearized by the use of first-order Taylor’s series and the big-M method as well as the linearization of the circular plane. The uncertainty of loads, the energy price, and the wind farm generation are modeled by scenario-based stochastic programming (SBSP). To determine the effectiveness of the proposed solution approach, it is tested on the IEEE 6-bus and 24-bus test systems using GAMS software.

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