A DC tie line power optimization method considering the adjustment cost of reactive power equipment

Abstract

The invention discloses a DC tie line power optimization method considering the adjustment cost of reactive power equipment belonging to the technical field of power system operation and dispatching.Firstly, according to the reactive power regulation characteristics of the traditional HVDC, the feasible and infeasible intervals of the transmission power of the HVDC tie line are determined, so asto reduce the operation times of the reactive power equipment. Secondly, the cost model of reactive power equipment regulation is established to optimize the operation times of reactive power equipment to avoid the frequent operation of reactive power equipment on both sides of DC and to reduce the loss of reactive power equipment life. Finally, the power optimization model of DC tie line is established, which not only improves the proportion of wind power consumption, but also improves the comprehensive benefits of the transmission and reception power network. The DC tie line power optimization method fully excavates the coordination and optimization benefit between the flexible regulation ability of the DC tie line and the DC reactive power regulation characteristic, absorbs the wind power in a larger space range, improves the absorbing level of the wind power resources, and realizes the operation economy of the DC cross-region interconnected power network.

Description

technical field [0001] The invention belongs to the technical field of power system operation and dispatching, and in particular relates to a method for optimizing the power of a DC tie line considering the adjustment cost of reactive power equipment. Background technique [0002] At present, my country's energy distribution is extremely uneven. Large-scale energy bases are mainly distributed in the remote northwest region, where the load level of the local power grid is low and there is a large surplus of electricity. Although the economy is developed in the eastern region and the load level is high, the energy supply is relatively insufficient. Therefore, it is an important direction for the development of power grids to promote the development of large-scale energy bases and cross-regional DC interconnection of power grids to achieve large-scale, high-efficiency and optimized allocation of clean energy. [0003] Most of the traditional DC day-ahead plans are prepared acco...

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Problems solved by technology

[0004] Since the flexible active power adjustment of the DC tie-line will lead to frequent actions of the DC reactive power adjustment equipment and affect the service life of the equipment, although the above method considers the flexible operation characteristics of the DC tie-line and continues to improve the power optimization model of the DC tie-line, However, the characteristics of reactive devices on both sides of the DC tie line are not considered.

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