Research on Configuration of Distributed Synchronous Condenser in UHV AC / DC Hybrid Power Grid

doi:10.3969/j.issn.1008-0198.2022.03.007

Abstract

Abstract: After the operation of 1 000 kV Xiaoxiang-Ganjiang UHV AC double circuit line, the transient voltage stability characteristics of Hunan power grid have been significantly improved. However, due to the mismatch between power supply construction and load growth, there are still voltage stability problems in Hunan power grid in wet and heavy load periods.Distributed synchronous condenser can provide strong moment of inertia and fast reactive power support for the system, and it is an important technical means to solve the problem of voltage stability of the receiving end power grid. Firstly, this paper compares the transient voltage support effects of different voltage levels in different substations in central and southern Hunan, and obtains the optimal configuration scheme of the condenser in Hunan power grid. Then it is proved that after the central China UHV AC loop network is put into operation, the new condenser can improve the transient voltage stability level of the power grid, release the standby of thermal power units and replace the startup of thermal power units, so as to play a great role in improving the Qi-Shao DC power transmission capacity, the overall power supply capacity of the whole province, the clean energy consumption capacity and the flexibility of power grid operation mode.

Key words: ultra-high voltage alternating current(UHV AC), transient voltage stability, distributed synchronous condenser, clean energy consumption, grid operation mode

CLC Number:

TM712

GAN Wangwei, CHEN Daojun, CUI Ting, PU Xi, ZUO Jian, LIU Yongyan. Research on Configuration of Distributed Synchronous Condenser in UHV AC / DC Hybrid Power Grid[J]. Hunan Electric Power, 2022, 42(3): 35-42.

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