摘要
交直流混合配电网的无功电压控制是保证其高效可靠运行的关键。为此,提出一种基于有限时间控制的分布式无功电压互动控制策略,在无集中控制器的架构下实现交流子网与直流子网间的无功电压互动支撑。该方法构建了分布式去中心化协同控制架构,利用有限时间控制实现多逆变器间的分布式一致性协同,同时保障无功功率增量的精确均分,避免多个下垂控制逆变器间的无功环流问题,进一步提高电压质量。相对于传统的一致性策略,所提出的策略收敛速度更快,且可适应系统各种扰动。为了验证该控制策略的控制效果,在PSCAD/EMTDC中建立了交直流混合配电网仿真模型,在多种工况下验证了系统分布式互动支撑及无功均分策略的有效性和适应性。
The reactive voltage control of AC/DC hybrid distribution network is the key problem to be solved to ensure its efficient and reliable operation. For this reason, a distributed reactive power and voltage interactive control strategy based on limited time control is proposed, which realizes the interactive reactive power and voltage support between AC subnet and DC subnet under the framework of no centralized controller. This method constructs a distributed decentralized cooperative control architecture. Achieve distributed consistency cooperation between multiple inverters with limited time control. At the same time, it can ensure the accurate division of reactive power increment, avoid the reactive power circulation problem between multiple drooping control inverters, and further improve the voltage quality. Compared with the traditional consistency strategy, the proposed strategy has faster convergence speed, and can adapt to various disturbances in system. In order to verify the cooperative interactive control effect of the control strategy, a simulation model of AC/DC hybrid distribution network is established in PSCAD/EMTDC. The effectiveness and adaptability of distributed interactive support and reactive power sharing strategy between AC subnet and DC subnet are verified under various operating conditions.
作者
耿少博
顾乔根
常风然
孙利强
王强
张海宁
GENG Shaobo;GU Qiaogen;CHANG Fengran;SUN Liqiang;WANG Qiang;ZHANG Haining(State Grid Hebei Electric Power Co., Ltd.,Shijiazhuang 050021,China;NR Electric Co., Ltd.,Nanjing 211102,China;NARI Group Cooperation(State Grid Electric Power Research Institute) Co.,Ltd.,Nanjing 211106,China)
出处
《电力工程技术》
2019年第4期26-33,共8页
Electric Power Engineering Technology
基金
国家重点研发计划资助项目(SGNR0000GZJS1808118)
关键词
交直流混合配电网
无功电压控制
互动支撑
下垂控制
AC/DC hybrid distribution network
reactive power and voltage control
interactive support
droop control
