Method for determining voltage-power relationship of voltage droop control converter station

Abstract

The invention relates to a method for determining a voltage power relationship of a voltage droop control converter station. The invention aims to provide a method for determining a voltage power relationship of a voltage droop control converter station, which is suitable for a multi-terminal flexible direct current system and comprises the following steps of: S01, determining a node voltage equation of a whole direct current network by taking a converter station direct current voltage as a variable according to a topological structure of the direct current system and a direct current line parameter; based on the node voltage equation, determining the direct current of any direct current line and the direct current of the converter station so as to determine an analytical formula of the loss of the whole direct current system; S02, selecting various typical operation conditions of the multi-terminal flexible DC system, and calculating the voltage and power level of each converter station under the condition that the loss of the DC system is minimum for each condition; and S03, calculating and fitting a DC voltage power characteristic curve of the converter station based on the voltage and power levels of the converter station under various typical operation conditions. The invention is applicable to the technical field of power system power transmission and distribution.

Description

technical field [0001] The invention relates to a method for determining the voltage-power relationship of a voltage drooping control converter station. It is applicable to the technical field of power transmission and distribution in power systems. Background technique [0002] The depletion of fossil energy and the deterioration of the environment and climate have made new energy, as a strategic resource, attract the attention of countries all over the world and gradually develop and apply it on a large scale. my country is rich in new energy reserves. In recent years, wind power and photovoltaics in the west and north have been vigorously developed. If the flexible consumption capacity of new energy can be further improved, the use of fossil energy can be reduced, carbon dioxide emissions can be avoided, and at the same time, the waste of light, wind and wind can be eliminated. Water issues provide important flexible DC transmission equipment support for my country to acc...

AI Technical Summary

Problems solved by technology

A problem that may be caused by the non-adjustability of the active power of the converter station is that it will cause a large loss in the entire DC system, resulting in uneconomical operation of the DC system

In addition, new energy also has a certain degree of randomness and volatility. Although the DC voltage droop control strategy can be used to share the power fluctuations at the sending end to each converter station at the receiving end, the power fluctuations at the receiving end It is difficult to reduce the loss of the DC system

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