虞城站特高压直流输电工程换流阀水冷系统节流孔板设计计算  

Design and Calculation of Throttle Orifice Plate in Converter Valve Cooling System of Yucheng Station UHVDC Transmission Project

作　　者：宗斌 严鹏航 任海莹[2,3] 李冬 Zong Bin;Yan Penghang;Ren Haiying;Li Dong(State Grid Jiangsu Electric Power Co.Ltd EHV Branch Company,Nanjing,211106;Beijing Guodian Futong Science,and Technology Development Co.,Beijing,100070;NARI Group Corporation(State Grid Electric Power Research Institute),Nanjing,211106)

机构地区：[1]国网江苏省电力有限公司超高压分公司,南京211106 [2]北京国电富通科技发展有限责任公司,北京100070 [3]南瑞集团(国网电力科学研究院)有限公司,南京211106

出　　处：《制冷与空调（四川）》2023年第1期148-152,共5页Refrigeration and Air Conditioning

基　　金：海上柔直平台海水综合冷却技术研发及应用。

摘　　要：换流阀水冷系统因其固有的结构设计和散热需求,系统容易发生因压降波动,流量陡变等参数变化导致装置误动作的现象。以新建白鹤滩-江苏±800kV特高压直流输电工程虞城站换流阀水冷系统各项参数指标为基准,基于孔板计算公式进行理论计算,同时利用一维软件Flowmaster建立模型进行仿真分析,并将二者结果对比得出孔径推荐值。按照规范设计多孔节流孔板,最后通过该水冷系统等比例装置进行试验分析,绘制不同节流孔板结构下,系统进阀总流量随着三通阀阀门开度的波动曲线图。试验结果表明,加装多孔节流孔板(12孔,孔径40mm)后的进阀总流量波动相较未加装节流孔板状态,波动比值降低为6.01%,下降幅度超过一半,效果显著。最终取节流孔板最优设计应用于虞城站,为后续新建工程及工程改造提供理论和运行依据。Due to the inherent structural design and heat dissipation requirements of the converter valve cooling system, The system is prone to misoperation caused by parameter changes such as pressure drop fluctuation and sudden flow change. The parameters of the converter valve cooling system of the Yucheng Station of the newly built Baihetan-Jiangsu ±800kV UHVDC transmission project are used as the benchmark. Theoretical calculation based on the orifice calculation formula, and the one-dimensional software Flowmaster is used to establish a model for simulation analysis, The results of the two are compared to obtain the recommended orifice size. The multi-hole orifice plate is designed according to the specification, and finally the test analysis is carried out through the proportional device of the water cooling system, Draw the fluctuation curve of the total flow of the system inlet valve with the valve opening of the three-way valve under different throttling orifice plate structures. The test results show that the fluctuation ratio of the total flow rate of the inlet valve after adding the orifice plate(12 holes 40mm) is reduced to 6.01% compared with the state without the orifice plate installed, and the reduction range is more than half, and the effect is remarkable. Finally, the optimal design of the throttling orifice plate is applied to the actual project, which provides the theoretical and operational basis for the subsequent new construction and engineering transformation.

关 键 词：换流阀水冷系统 节流孔板 三通阀 Flowmaster 

分 类 号：TH137.5[机械工程—机械制造及自动化]