An Online Calculation Data Generation Technology for Power Grid Integrated with Large-Scale Wind Farm

Wind power penetration ratios of power grids have increased in recent years; thus, deteriorating power grid stability caused by wind power fluctuation has caused widespread concern. At present, configuring an energy storage system with corresponding capacity at the grid connection point of a large-scale wind farm is an effective solution that improves wind power dispatchability, suppresses potential fluctuations, and reduces power grid operation risks. Based on the traditional energy-storage battery dispatching scheme, in this study, a multi-objective hybrid optimization model for joint wind-farm and energy-storage operation is designed. The impact of two new aspects, the energy-storage battery output and wind-power future output, on the current energy storage operation are considered. Wind-power future output assessment is performed using a wind-power-based Markov prediction model. The particle swarm optimization algorithm is used to optimize the wind-storage grid-connected power in real time, to develop an optimal operation strategy for an energy storage battery. Simulations incorporating typical daily wind power data from a several-hundred-megawatt wind farm and rolling optimization of the energy storage output reveal that the proposed method can reduce the grid-connected wind power fluctuation, the probability of overcharge and over-discharge of the stored energy, and the energy storage dead time. For the same smoothing performance, the proposed method can reduce the energy storage capacity and improve the economic efficiency of the wind-storage joint operation.

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Study on Application of STATCOM in Dynamic Reactive Power Compensation of Wind Farm Integration

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.672-674.255 ◽

2014 ◽

Vol 672-674 ◽

pp. 255-261

Author(s):

Zhi Jian Liu ◽

Zi Qi Zhao ◽

Bo Li

Keyword(s):

Wind Power ◽

Large Scale ◽

Wind Farm ◽

Reactive Power ◽

Power Grid ◽

Reactive Power Compensation ◽

System Stability ◽

Static Synchronous Compensator ◽

Wind Power Integration ◽

Doubly Fed

As an increasing proportion of wind power in power grid, reactive power problem has become the most important problems in wind power integration. But as a result of wind power is a kind of intermittent energy sources, and put it into use in a large scale only just beginning. Many urgent problems which affect on system stability need to be resolved, such as voltage stability, reactive power compensation. This paper discussed the problems which around the reactive power compensation and angle stability issues while wind power integration. The reactive power compensation device named STATCOM instead of traditional capacitance. Establish the mathematical model of the Doubly-Fed Induction Generator (DFIG) and Static Synchronous Compensator (STATCOM) [3]. In order to meet the wind farm can transport reactive power quickly and continuously after fault. Establish the control strategy of DFIG combined with STATCOM [1]. Using the software MATLAB to simulate the wind power grid model and control system, verifies the rightness and effectiveness of model and STATCOM reactive power compensation effect for wind power integration.

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Mechanism Research about Impact of Transmission Channel Power Constraint on Grid Loss with Large-Scale Wind Power Integration

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.1070-1072.919 ◽

2014 ◽

Vol 1070-1072 ◽

pp. 919-922

Author(s):

Peng Xia ◽

Wen Ying Liu ◽

Fu Chao Liu ◽

Xi Wei Fu

Keyword(s):

Wind Power ◽

Channel Flow ◽

Large Scale ◽

Wind Farm ◽

Power Transmission ◽

Power Grid ◽

Transmission Channel ◽

Theoretical Derivation ◽

Wind Power Integration ◽

Grid Loss

With the significant development of wind power, it has been inevitable for wind farm cluster to integrate into the system from the grid end, therefore, the power grid loss problem of large-scale wind power integration is highlighted. At first, we construct a power transmission system model with large-scale wind power integration, get the power grid loss calculation formula of the system, and induce the change laws of the power grid loss by the constraints of power transmission channel flow. And then, based on the structure of Gansu power grid, we do some simulations about power grid loss distribution by the constraints of power transmission channel flow, and verify the correctness of theoretical derivation.

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Optimal Allocation Algorithm of Grid Side Energy Storage Capacity under Large Scale Wind Farm Connection

Journal of Physics Conference Series ◽

10.1088/1742-6596/2087/1/012005 ◽

2021 ◽

Vol 2087 (1) ◽

pp. 012005

Author(s):

Junpeng Ma ◽

Jianjun Sha ◽

Feiyan Liu

Keyword(s):

Energy Storage ◽

Capacity Planning ◽

Large Scale ◽

Wind Farm ◽

Optimal Allocation ◽

Storage Capacity ◽

Power Grid ◽

Allocation Algorithm ◽

Energy Storage Capacity ◽

Grid Side

Abstract For grid energy storage capacity configuration is not reasonable, problems such as instability in crossing the river power fluctuations, are proposed based on a large scale wind power grid side under the condition of energy storage capacity of the optimal allocation algorithm, through the use of large-scale wind farm access method to achieve the optimal design of power grid model, so as to quickly solve the micro grid energy storage capacity planning cost and energy consumption data, according to the results. The operation parameters, energy loss and other numerical values of the model in the power grid are controlled, and according to the calculation results. Finally, the experiment proves that the optimization configuration algorithm of the power grid side energy storage capacity under the large-scale wind farm access has higher practicability and accuracy in the practical application process, and fully meets the research requirements.

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