Planning simulation method for estimating adaptability of wind power grid-connection scale and power grid net rack

Abstract

The invention provides a planning simulation method for estimating the adaptability of a wind power grid-connection scale and a power grid net rack, comprising the following steps of: (1) carrying out steady-state analysis on a planning scheme; adjusting a power grid planning scheme according to a steady-state analysis result; (2) carrying out dynamic analysis on the planning scheme and adjusting the power grid planning scheme according to a dynamic analysis result; (3) carrying out mutual influence analysis on a wind power scale and a grid-connection near-region net rack and adjusting the power grid planning scheme according to a mutual influence analysis result; and (4) revising and identifying the power grid planning scheme to obtain a revised wind-power power supply and power grid coordination planning scheme. According to the planning simulation method for estimating the adaptability of the wind power grid-connection scale and the power grid net rack disclosed by the invention, after the comprehensive and large-scale wind power grid-connection is carried out, influences on dynamic properties of a plurality of fan types, a responding property difference and a wind source property on an electric power system are good for promoting coordinated development of wind power grid-connection and power grid planning.

Description

technical field [0001] The invention belongs to the field of grid-connected planning for renewable energy power generation, in particular to a planning simulation method for evaluating the grid-connected scale of wind power and the adaptability of grid grids. Background technique [0002] After the large-scale integration of intermittent wind power and renewable energy into the grid, due to its randomness and volatility, the operation mode of the power system will change greatly. Such as spinning reserve ratio, system peak shaving, frequency modulation service arrangement, etc. On the other hand, due to the power production characteristics of renewable energy itself, large-scale access will also affect system characteristics. Therefore, it is necessary to deeply analyze the changes in dynamic characteristics of the system such as active power, reactive power, frequency, and voltage after large-scale access to renewable energy. [0003] In the wind power industry of all cou...

AI Technical Summary

Problems solved by technology

[0004] (1) In terms of wind resource characteristics, wind power has random and intermittent characteristics, making it difficult for wind power to formulate and implement accurate power generation plans in advance like conventional power sources

(2) In terms of fan characteristics, the impact of wind turbines on the safety and stability of the power grid is different from that of conventional synchronous generators. Wind turbines using asynchronous machines emit active power while absorbing reactive power, and voltage control is more difficult

(3) In countries with vast populations, the geographic location of wind farms is generally relatively remote, the grid structure at the grid connection point is generally not strong enough, the power supply structure is relatively simple, the system is relatively weak, and the large-scale access of wind power affects these areas. There are problems that have a great influence on the planning of grid structures

However, relatively complete and clear ideas, strategies and frameworks have not yet been formed

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