An accurate power flow calculation method for distributed wind power connected to distribution network

Abstract

The invention provides an accurate power flow calculation method for decentralized wind power access to distribution network, including: S1, collecting grid data, wind turbine data, and wind farm wind direction and wind speed data; S2, inverting atmospheric wind speed and temperature based on FPI The principle determines the relationship between wind direction and wind speed and temperature to correct the resistance; S3, introduces the probability density model of wind direction and wind speed; S4, uses the corrected resistance value to carry out accurate power flow calculation, and applies the probability density model of wind direction and wind speed to the power flow Distributed computing. The present invention provides accurate probabilistic power flow calculation for distributed wind power access to distribution network, considers the access characteristics of distributed wind power, and realizes distributed wind power access to distribution network by obtaining wind speed and wind direction data and probability density models of wind farms The exact probabilistic power flow algorithm. The problem of wind speed uncertainty in the prior art is solved, the accurate calculation of power flow distribution is realized, and the calculation accuracy is improved.

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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