Method and system for evaluating safety and performance of wind power connected to power grid

Abstract

The present invention discloses a safety and effectiveness evaluation method and system for accessing wind-power into a power grid. The method comprises: after accessing wind-power into a power grid, collecting basic operation data of the power grid, and storing the data into a database; according to the collected basic operation data of the power grid, calculating a safety index, wherein the safety index comprises a power grid voltage safety index, a power grid frequency safety index, a power grid angle instability index, and a high risk event consequence index; according to the collected basic operation data of the power grid, calculating a effectiveness index, wherein the effectiveness index comprises a discarding wind volume ratio index, emission reduction amount of wind power generation, substitution amount of wind power generation, and an overall effectiveness index; and according to the overall safety index and overall effectiveness index value, calculating overall evaluation index values of safety and effectiveness of accessing wind-power into a power grid. The synthesis of safety and effectiveness indexes of accessing wind-power into a power grid can obtain an overall evaluation index system covering social benefits, environmental benefits, and safety benefits of accessing wind-power into a power grid, and has high practical value.

Description

Technical field [0001] The invention relates to a method and system for evaluating the safety and efficiency of wind power access to a power grid. Background technique [0002] Wind power has the characteristics of randomness, volatility and unschedulability. The injection of high-permeability wind power changes the power flow distribution of the system. The steady-state and transient characteristics of wind turbines that are different from traditional synchronous generators will also affect the system's performance. Voltage stability and frequency stability, etc. The integration of highly concentrated wind power into the grid is subject to many security and stability constraints, such as grid power flow constraints, static security constraints, voltage stability constraints, and short-circuit capacity constraints. Therefore, in order to ensure the safe and stable operation of the grid, when planning a wind farm, while making full use of local wind energy resources, it is necess...

AI Technical Summary

Problems solved by technology

[0006] 1. The data collection is not comprehensive enough, and the evaluation of safety or energy efficiency only for a few variables will lead to inaccurate results;

[0007] 2. The evaluation system cannot meet the real-time requirements. The existing evaluation system analyzes the collected historical data instead of evaluating real-time data

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