Point distribution method and system of reactive power compensation device in multi-infeed system

Abstract

The invention relates to a point distribution method and system of a reactive power compensation device in a multi-infeed system, and belongs to the technical field of high-voltage direct current transmission. According to the interaction effect factors between every two converter stations before and after the reactive power compensation device is added, the sensitivity of each node to the converter station interaction effect factors is calculated, the sensitivity of all the nodes to the interaction effect factors is ranked, and therefore the priority of installation positions of the reactive power compensation device is determined. According to the method and the system, the sensitivity of the nodes is made use of for point distribution of the reactive power compensation device, the influence of an alternating current side network structure on the current commutating bus interaction effect factor is considered, the influence of the compensation characteristic of the reactive power compensation device on the current commutating bus interaction effect is also considered, and therefore the coupling relationship between every two current commutating buses is optimally improved in the whole.

Description

Technical field [0001] The invention relates to a method and a system for arranging reactive power compensation devices in a multi-feed system, and belongs to the technical field of high-voltage direct current transmission. Background technique [0002] East China and South China are the two regions with the largest demand for electricity in the country, and they are also the location of multiple DC transmission lines, which also makes these two regions have formed a multi-feed DC transmission pattern. In the future, with the further development of the economy, the construction of more conventional UHV DC transmission lines and the multi-feed DC transmission pattern will become the new normal. However, when the power grid in the multi-infeed DC area is weak and the electrical coupling relationship between the multi-infeed points is strong, (continuous) commutation failures and secondary commutation failures between stations are prone to occur, resulting in unstable power supply s...

AI Technical Summary

Problems solved by technology

However, when the power grid in the multi-infeed DC area is weak and the electrical coupling relationship between the multi-infeed points is strong, (continuous) commutation failures and secondary commutation failures between stations are prone to occur, resulting in instability of the power supply system , which has seriously affected the healthy and rapid economic development of the receiving regions

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