【摘要】 为充分利用构网控制的电压源特性，协同场站内多无功源进一步提升新能源场站对高比例新能源电力系统的暂态电压主动支撑能力，提出了基于构网变流器的新能源场站暂态电压分散协同控制策略，包括多无功源暂态电压控制改进策略和容量配置方法两方面。首先，对场站无功源的基本特性进行分析。然后，构网变流器增加了基于无功补偿的暂态控制，提高暂态内电势电压。跟网变流器和静止同步补偿器(static var generator, SVG)分别通过暂态有功/无功自适应变化控制策略、暂态参考值变化策略，增大两者的暂态无功出力。静止无功补偿器(static var compensator, SVC)采用暂稳态切换控制策略，由稳态的无功控制切换为电压控制，以进一步提高电压调节水平。同时基于最大暂态电流和补偿容量需求提出多无功源的容量配置方法。最后，构建弱电网下暂态电压主动支撑典型场景，验证了所提分散协同控制策略提高了场站的暂态电压支撑能力，挖掘了构网控制在场站主动暂态电压支撑方面的作用。更多还原

【Abstract】 To fully utilize the voltage source characteristics of grid forming control and coordinate multiple reactive power sources within renewable energy power plants to enhance their transient voltage support capability in power systems with high renewable penetration, a decentralized coordinated transient voltage control strategy is proposed for renewable energy plants based on grid forming converters. This strategy includes an improved transient voltage control strategy for multiple reactive power sources and a method for capacity allocation. First, the basic characteristics of reactive power sources in the power plant are analyzed. Then, a transient control based on reactive power compensation is introduced into grid forming converters to increase the transient internal potential voltage. Grid following converter and static var generator(SVG) respectively adopt adaptive transient active/reactive control and reference value adjustment strategies to increase their transient reactive power outputs. For static var compensator(SVC), a transient switching strategy is employed to switch from steady-state reactive power control to voltage control to further improve voltage regulation performance. Meanwhile, a capacity allocation method for multiple reactive power sources is proposed based on maximum transient current and reactive compensation requirement. Finally, a typical scenario of active transient voltage support is built under weak network conditions to validate that the proposed decentralized collaborative control strategy improves the transient voltage support capability of the plant, highlighting the role of grid forming control in active transient voltage support.更多还原