柔性直流系统中变速抽蓄机组与风电的协调控制策略研究  

Research on coordinated control strategy of variable speed pumping unit and wind power in flexible DC system

作　　者：李偲[1] 郗文康 张德隆 张妍[1] 张浩[1] 李美成[1] LI Cai;XI Wen-kang;ZHANG De-long;ZHANG Yan;ZHANG Hao;LI Mei-cheng(North China Electric Power University,Beijing 102206,China)

机构地区：[1]华北电力大学,北京102206

出　　处：《天津理工大学学报》2020年第4期16-21,32,共7页Journal of Tianjin University of Technology

基　　金：国家自然科学基金(71974055);北京节能与电力技术开发基金会项目(J2019001);国网公司科技项目(52010118000M).

摘　　要：柔性直流输电逐渐成为当前输送新能源最具优势的输电方式之一,同时也对电力系统的稳定运行提出了更高的要求.为了解决柔直系统中新能源固有的波动性带来并网冲击的问题,考虑接入变速抽蓄机组平抑风电出力波动,保证柔性直流输电送出功率的稳定性.为此,本文首先介绍了变速抽水蓄能机组的基本原理;其次构建了风电机组、变速抽蓄机组与柔性直流联合系统的模型,并提出了利用变速抽水蓄能机组平抑风电波动的协调控制策略,最后,对变速抽蓄机组的响应能力及其与风电系统的协调控制能力进行了仿真分析.结果表明变速抽蓄机组具有较高的灵活性和可靠性,是保障电网安全、稳定运行的可靠工具,也验证了本文所提协调控制策略的有效性.Flexible DC transmission has gradually become one of the most advantageous transmission methods for delivering new energy,and it also puts forward higher requirements for the stable operation of the power system.In order to solve the problem of grid-connected impact caused by the inherent volatility of new energy in the flexible system,consider shifting the variable-speed pumping unit into the system to stabilize the wind power output fluctuation and ensure the stability of the flexible DC transmission power.Based on the above problems,this paper first introduces the basic principle of the variable speed pumped storage unit;Secondly,this paper constructs a model of wind turbine,variable speed pumping unit and flexible DC combined system,and proposes a coordinated control strategy to stabilize wind power fluctuations by using variable speed pumped storage units;Finally,the responsiveness of the variable speed pumping unit and its coordinated control with the wind power system are simulated and analyzed.Research shows that the variable speed pumping unit has high flexibility and reliability,and is an effective tool to ensure safe and stable operation of the power grid.The results show that the variable speed pumping unit has high flexibility and reliability,and is a reliable tool to ensure the safe and stable operation of the power grid.It also verifies the effectiveness of the coordinated control strategy proposed in this paper.

关 键 词：变速抽水蓄能机组 风电 柔性直流 协调控制策略 平抑波动 

分 类 号：TM612[电气工程—电力系统及自动化]