考虑多能源配套的送端电网直流集群暂态过电压优化策略研究  

STUDY ON TRANSIENT OVERVOLTAGE OPTIMIZATION STRATEGY OF DC CLUSTER IN SENDING-END GRID CONSIDERING MULTI-ENERGY MATCHING

作　　者：牛拴保 崔伟 张文朝 汪莹 黄明辉 王聪 Niu Shuanbao;Cui Wei;Zhang Wenchao;Wang Ying;Huang Minghui;Wang Cong(School of Electrical Engineering,Xi’an Jiaotong University,Xi’an 710049,China;Northwest Branch of State Grid Corporation of China,Xi’an 710050,China;Beijing Kedong Electric Power Control System Co.,Ltd.,Beijing 100192,China)

机构地区：[1]西安交通大学电气工程学院,西安710049 [2]国家电网有限公司西北分部,西安710050 [3]北京科东电力控制系统有限责任公司,北京100192

出　　处：《太阳能学报》2025年第4期103-113,共11页Acta Energiae Solaris Sinica

基　　金：国家电网有限公司西北分部(SGNW0000FGJS2310035)。

摘　　要：针对含大规模风电、光伏发电资源汇集成直流集群接入的送端电网中,系统发生直流故障时直流集群易受到暂态过电压影响的问题,提出一种考虑多能源配套的送端电网直流集群暂态过电压优化策略。首先,基于送端电网简化等效系统,分析大规模直流集群接入下送端电网暂态过电压变化特性,建立直流集群暂态过电压模型。其次,考虑多能源配套设备接入直流集群近端,对直流集群暂态过电压模型进行部分修正。然后,以直流集群近端暂态过电压、直流集群近端多能源配套设备调节成本为优化目标,建立送端电网暂态过电压优化模型,并结合神经网络算法和遗传算法,提出送端电网暂态过电压优化求解算法。最后,以西北某地区直流外送通道运行数据为基础,搭建仿真模型对直流故障下的系统暂态过电压进行分析,结果表明该文所建模型在直流集群输出母线暂态过电压的平抑方面具有明显效果。Aiming at the problem that the DC cluster is easily affected by transient overvoltage when DC fault occurs in the DC cluster access system with large-scale wind power and photovoltaic power generation resources,a transient overvoltage optimization strategy of DC cluster in sending-end grid considering multi-energy matching is studied in this paper.Firstly,based on the simplified equivalent system of the sending-end grid,the transient overvoltage variation characteristics of the sending-end grid under large-scale DC cluster access are analyzed,and the transient overvoltage model of the DC cluster is established.Secondly,the transient overvoltage model of DC cluster is partially modified considering that multi-energy equipment is connected to the near end of DC cluster.Then,taking the transient overvoltage at the proximal end of the DC cluster and the adjustment cost of multi-energy supporting equipment at the proximal end of the DC cluster as the optimization objectives,the transient overvoltage optimization model of the sending-end grid is established.Combined with neural network algorithm and genetic algorithm,the optimal solution algorithm for the transient overvoltage of the sending-end grid is proposed.Finally,based on the operation data of DC transmission channel in a certain region in northwest China,a simulation model is built to analyze the system transient overvoltage under DC fault.The results show that the model established in this paper has a significant effect on the suppression of transient overvoltage of DC cluster output bus.

关 键 词：暂态过电压 送端电网 直流集群 多能源配套 神经网络 

分 类 号：TM73[电气工程—电力系统及自动化]