新能源并网系统的功率传输极限分析研究  

Power transfer limits analysis of renewable energy grid-connected system

作　　者：黄海荣 张旭[2] 翁华 何勇玲 李宇骏 朱维骏 郭雨涵 HUANG Hairong;ZHANG Xu;WENG Hua;HE Yongling;LI Yujun;ZHU Weijun;GUO Yuhan(Zhejiang Huayun Electric Power Engineering Design Consulting Co.,Ltd.,Hangzhou 310006,China;School of Electrical Engineering,Xi’an Jiaotong University,Xi’an 710049,China)

机构地区：[1]浙江华云电力工程设计咨询有限公司,浙江杭州310006 [2]西安交通大学电气工程学院,陕西西安710049

出　　处：《电工电能新技术》2023年第7期23-30,共8页Advanced Technology of Electrical Engineering and Energy

基　　金：国家自然科学基金项目(51807150);浙江华云电力工程设计有限公司科技项目(2021C1D08P02)。

摘　　要：功率传输极限作为评估新能源并网系统输送功率能力的重要指标,其受到诸多因素的影响,并在一定程度上制约了新能源系统的发电水平。本文首先推导出新能源并网系统的功率传输极限分析模型,并指出当换流器处于单位功率因数控制下时,其功率传输极限仅为输电线路功率传输极限的一半。其次,提出了一种在公共连接点处配置无功补偿装置的方法以提高并网换流器功率传输能力。然后,研究了含无功补偿装置的新能源并网系统的功率传输极限以及静态稳定边界。最后,提出提升功率传输极限的无功控制规律并通过仿真验证其正确性。As a significant index for evaluating power transmission capacity of renewable energy grid-connected system,the power transfer limits(PTLs) are affected by many factors and,to a certain extent restrict the power generation level of the renewable energy systems.PTLs of the renewable energy grid-connected system influenced by the transmission line and voltage source converter(VSC) control are firstly derived in this paper,and it is concluded that PTL of VSC is only half of PTL of the line under the classical unit power factor control.To enlarge PTLs of VSC,a novel configuration method for the shunt capacitors installed at PCC is further proposed.Moreover,PTLs and the static stability margins of the renewable energy grid-connected system with the installed shunt capacitors are analytically deduced considering the limits of PCC voltage,VSC capacity,as well as the system voltage variations.Finally,reactive power control laws of VSC for attaining these PTLs are also presented,and its correctness is verified by numerical simulation.

关 键 词：新能源并网系统 功率传输极限 电压源型换流器 公共连接点电压限制 系统电压波动 

分 类 号：TM711[电气工程—电力系统及自动化]