UHV DC Correction Method Considering Sending and Receiving Power Grids

Abstract

The invention discloses an extra-high-voltage direct current correction method considering sending-end and receiving-end power grids. The method comprises the following steps: establishing an extra-high-voltage direct current correction model objective function considering a new energy consumption space of the sending-end power grid and a peak regulation margin of the receiving-end power grid; establishing constraint conditions of the extra-high-voltage direct current correction model objective function; calculating and determining a corrected extra-high-voltage direct current tie line power curve according to the extra-high-voltage direct current correction model objective function and the constraint conditions; and adjusting the power of an extra-high-voltage direct current tie line according to the corrected extra-high-voltage direct current tie line power curve. The method considers reduction of wind curtailment and light curtailment rates of the sending end, and meanwhile, reducespeak shaving pressure of the receiving-end power grid and ensures stable operation of the receiving-end power grid.

Description

technical field [0001] The invention relates to the field of electric power technology, in particular to an UHV DC correction method taking into account the power grids at the sending end and the receiving end. Background technique [0002] The distribution of new energy in my country is concentrated and has the characteristics of "reverse distribution" with the load center, which often leads to great difficulties in the consumption of new energy. Therefore, the construction of UHV DC lines to transmit remote clean energy to the load center and realize large-scale and long-distance transmission of electric energy has become an inevitable choice for my country to solve the imbalanced energy distribution pattern. [0003] At present, the DC projects that have been put into operation in China mainly adopt a two-stage operation mode. The electric power is constant in each period, that is, the constant power mode, and the DC operation plan curve is mainly "linear". In the consta...

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Problems solved by technology

[0005] The main purpose of the present invention is to provide a UHV DC correction method that takes into account the power grids at the sending end and the receiving end, aiming to solve the problem in the prior art that there is no UHV DC correction method that considers the needs of the sending end and the receiving end at the same time

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