Abstract：Aiming at the voltage fluctuation problem in the integrated electricity-gas system（IEGS）and

considering the reactive power support capability of new energy units and coupling elements，a reactive power and

voltage optimization control method for the IEGS was proposed. First，based on the analysis of the composition and

structure of the IEGS，a model of the IEGS was established. Then，taking into account the constraints of the power

grid，gas network，and coupling elements，with the comprehensive system cost and voltage deviation as

optimization objectives，a reactive power and voltage optimization model for the IEGS was developed. The secondorder cone relaxation technique was used to transform the established reactive power and voltage optimization model into a mixed-integer convex optimization problem for solution. Finally，simulations were conducted on the IEGS33-7 system，formed by coupling the IEEE33-node power grid with a 7-node natural gas network. The results show that considering the reactive power support capability of new energy units and coupling elements can significantly reduce the comprehensive system cost and improve voltage fluctuations.

        Key words：integrated electricity-gas system（IEGS）；photovoltaic power generation；reactive power support of gas turbines；reactive power and voltage optimization

     Format Citation:王雨薇，王静，王勇,等. 电-气互联综合能源系统无功电压优化控制方法[J].电气传动,2026,56(07):29-38. WANG Yuwei，WANG Jing，WANG Yong,et al. Reactive power and voltage optimization control method for integrated Electricity-Gas system [J].Electric Drive, 2026,56(07):29-38