考虑分布式新能源接入的配电网安全域分析  

Analysis of Distribution Network Security Domain Considering Distributed New Energy Access

作　　者：李可欣 蔺红[1] LI Kexin;LIN Hong(School of Electrical Engineering,Xinjiang University,Urumqi 830047,China)

机构地区：[1]新疆大学电气工程学院,新疆乌鲁木齐830047

出　　处：《控制工程》2024年第11期2036-2044,共9页Control Engineering of China

基　　金：国家自然科学基金资助项目(52367012);新疆维吾尔自治区重点研发专项资助项目(2022B01020-3)。

摘　　要：分布式新能源接入对配电网稳定性带来新的挑战,为有效判断含新能源的配电网稳定运行状态,对配电网的安全情况进行分析,提出一种考虑新能源接入的配电网安全域计算方法。首先,考虑节点电压与节点功率注入之间的关系,建立新的配电网安全边界搜索模型,采用改进鲸鱼优化算法进行求解并使用超平面来近似安全域边界,计算新能源接入配电网安全域超平面系数;其次,引入安全裕度指标,衡量运行点到安全域边界的距离;最后,通过算例分析了不同新能源渗透率下的配电网安全性。算例仿真结果表明,所提方法能快速准确搜索配电网安全域临界点,安全域超平面具有近似平行的性质,且边界随着新能源渗透率变化发生改变,在合理的位置接入容量恰当的新能源可以有效提高配电网稳定性。In order to effectively judge the stable operation state of the distribution network containing new energy,the security situation of the distribution network is analyzed,and a security domain calculation method of the distribution network considering the access of new energy is proposed.Firstly,considering the relationship between node voltage and node power injection,a new safety boundary search model of distribution network is established,the improved whale algorithm is used to solve the problem,and the hyperplane is used to approximate the safety domain boundary,and the superplane coefficient of the potential safety domain of the new energy access distribution network is calculated.Secondly,the safety margin index is introduced to measure the distance from the operating point to the boundary of the security domain.Finally,the security of the distribution network under different renewable energy penetration rates is analyzed by examples.The simulation results show that the proposed method can quickly and accurately search for the critical point of the distribution network safety domain,the hyperplane safety domain has the property of approximately parallel,and the boundary changes with the change of new energy permeability,and the access to new energy with appropriate capacity at a reasonable location can effectively improve the stability of the distribution network.

关 键 词：分布式新能源 配电网安全域 超平面系数 鲸鱼优化算法 

分 类 号：TP29[自动化与计算机技术—检测技术与自动化装置]