Accurate flow calculation method for distributed wind power integration distribution networks

Abstract

The invention provides an accurate flow calculation method for distributed wind power integration distribution networks. The method comprises the following steps of: S1, acquiring power grid data, wind turbine generator data, wind power plant wind direction and wind speed data; S2, determining a determination relationship among the wind direction, a wind speed and a temperature according to an FPIatmospheric wind speed and temperature basic principle, so as to correct resistance; S3, importing probability density models of the wind direction and the wind speed; and S4, carrying out accurate flow calculation by utilizing the corrected resistance value and applying the probability density models of the wind direction and the wind speed to flow distribution calculation. The method is capableof providing accurate probability flow calculation for distributed wind power integration distribution networks, considering the integration characteristics of distributed wind power, and realizing an accurate probability flow algorithm for the distributed wind power integration distribution networks through obtaining data of the wind power plant wind speed and wind direction and the probabilitydensity models. The method is capable of solving the problem that the wind speed is uncertain in the prior art, realizing accurate calculation of flow distribution and improving the calculation accuracy.

Description

technical field [0001] The invention relates to the technical field of power system new energy power generation, in particular to an accurate power flow calculation method for decentralized wind power connected to a distribution network. Background technique [0002] In 2009, my country formulated the development strategy of "Strong Smart Grid", and developed and constructed wind energy according to the idea of ​​"integrating large-scale wind power bases into large power grids". Decentralized wind power is in contrast to centralized wind power. It is mainly aimed at areas with low wind speed and high load. It refers to small wind farms connected to the distribution network in a decentralized manner. Its capacity is relatively small, ranging from tens of kilowatts to tens of kilowatts. The power generated by distributed wind power is generally not large-scale and long-distance transmission. At present, distributed wind power is mostly distributed in remote areas, islands, and...

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Problems solved by technology

At the same time, large-scale centralized wind power generation has the characteristics of a large amount of supporting grid construction, multiple points and areas, and heavy tasks, requiring a large amount of capital investment. Difficulties, coupled with the limited capacity of grid companies to access wind power and fully purchase wind power, overheated investment, and overcapacity, have resulted in the coexistence of "big wind power" and "big wind abandonment", and the transformation of the wind power industry is imperative

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