水利学报2019，Vol.50Issue(4)：475-487,13.DOI:10.13243/j.cnki.slxb.20181130
抽水蓄能机组电路等效实时精细化模型研究及应用
Study on the real-time accurate model of pumped storage unit based on equivalent circuit
摘要
Abstract
A real-time accurate equivalent circuit model (RAECM) of pumped storage unit (PSU) is proposed to solve the conundrums that the traditional linear model is difficult to accurately describe the hydraulic transient behavior of large fluctuating conditions, and the nonlinear model based on method of characteristic (MOC) cannot ensure the real-time of simulation and the existing models of PSU for control optimization match the actual operations in power station hardly. According to the layout of pipe system, the topological network of equivalent circuit is constructed. The interpolation model of pump turbine based on improved Suter transformation and BP neural network has been put forward to improve the accuracy in the S characteristic area. The formula of water head for compensating error is derived using the discrete analysis of variable-scale space-time. The implicit RadauⅡA is introduced to solve implicit ordinary differential equations, which can improve the model stability owing to the wider stability domain. Finally, the time complexity and simulation efficiency of RAECM are analyzed. The simulations indicate that RAECM can not only satisfy the calculation precision of the overall performance, but also guarantee the real-time in operations, which can serve as the basis for the various engineering applications.关键词
电路等效理论/抽水蓄能机组/在线仿真/过渡过程/全特性曲线Key words
equivalent circuit theory/pumped storage unit/the real-time simulation/transient process/complete characteristic curves分类
建筑与水利引用本文复制引用
赵志高,杨建东,杨威嘉,陈满,彭煜民..抽水蓄能机组电路等效实时精细化模型研究及应用[J].水利学报,2019,50(4):475-487,13.基金项目
国家自然科学基金项目(51879200,51809197,51839008) （51879200,51809197,51839008）
国家重点研发计划(2017YFB0903700) （2017YFB0903700）
