System simulation method for connecting large-scale wind power into power grid in centralization way

Abstract

The invention proposes a system simulation method for connecting large-scale wind power into a power grid in a centralization way and an effective equivalent mode of a high-capacity wind power station. Based on the synchronization operating characteristics of the large-scale wind power, the invention makes the large-scale wind power synchronization simulation analysis principle under the comprehensive consideration of the influences of the wind resource characteristics of wind power generation, the dynamic response characteristics of a wind driven generator and the differentiation characteristics of different types and different control modes of various wind driven generators and the like; therefore, the invention constructs the complete analytical framework and flows of the system simulation assessment with the large-scale wind power being connected into the power grid. The simulation analysis result shows that the system simulation method can comprehensively, objectively and accurately assess the impact and the safety bottleneck to the stable running of a power system caused by wind power synchronization after the base synchronization of the large-scale wind power due to the affection to the dynamic response characteristics of the power system by the differentiation of the types and the response characteristics of various wind driven generators and the wind resource characteristics. Therefore, the method is beneficial for the scheduling and operating staff to accurately grasp the affection to the system characteristics by the connection of the large-scale wind power and the law of the connection of the large-scale wind power, and has significant meaning for instructing and making the corresponding precautionary and improved measure and ensuring the normal running of the system after the connection of wind power.

Description

technical field [0001] The invention belongs to the field of simulation and calculation of power systems and the field of renewable energy power generation, and in particular relates to a system simulation method for centralized access of large-scale wind power to a power grid. Background technique [0002] Some foreign power system analysis tools have realized the simulation of wind turbines earlier, such as PSS / E, DigSIlent and so on. For a long time, there has been a lack of computing tools with corresponding functions in China. Through the research on wind turbine modeling during the "Eleventh Five-Year Plan", a practical wind turbine model has basically been formed in China and realized in software. However, due to the large number of types of wind turbines, the large number of manufacturers, and the large differences in control logic, the current modeling work of wind turbines in domestic and foreign software is not comprehensive enough to cover all types of wind turbi...

AI Technical Summary

Problems solved by technology

As an environmentally friendly energy source, the governments of most European countries have legislated to ensure that wind power is connected to the grid for power generation. However, due to the unpredictability of wind power output, the grid of the European Transmission Union (UCTE) is suffering from increasing output fluctuations brought about by wind power access.

Before the accident, wind power surged due to the weather, resulting in aggravated power flow in important sections of the system

After the accident, a large number of wind turbines in the low cycle area tripped, which further exacerbated the power shortage of the system, while a large number of wind turbines in the high cycle area were automatically connected to the grid during the system frequency recovery stage, which delayed the frequency recovery process and caused the system power flow to be redistributed and part of the cross-section power limit

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