Start-Up Simulation of the Improved TOPAZ-II Space Power System

2016 ◽  
Author(s):  
Wenwen Zhang ◽  
Wenxi Tian ◽  
Suizheng Qiu ◽  
Guanghui Su
Keyword(s):  
Power System ◽  
Heat Pipe ◽  
System Analysis ◽  
Thermal Characteristics ◽  
Reactor Power ◽  
Analysis Model ◽  
Pipe Model ◽  
Start Up ◽  
Coolant Loop ◽  
Physics Model

An system analysis code coupled with the heat pipe model is developed to analyze the thermal-hydraulic characteristics of the improved TOPAZ-II space reactor power system with a heat pipe radiator. The core thermal-hydraulic model, neutron physics model, and the coolant loop components models (including pump, volume accumulator, pipes and plenums) are established. The designed heat pipe radiator, which replaces the original coolant loop radiator, is also modeled, including the two-dimensional heat pipe analysis model, the fin model and the coolant transport duct model. The start-up procedure of the improved TOPAZ-II system are calculated. The results show that the code can be used to obtained the thermal characteristics of the system start-up process.

Research on the 330MW Double-Extraction Steam Turbine of Dynamic and Thermal Characteristics Analysis Model

2014 ◽  
Vol 472 ◽  
pp. 1008-1016
Author(s):  
Yu Zhu ◽  
Qian Jun Li ◽  
Li Kun Zheng ◽  
Yong Xin Feng
Keyword(s):  
Steam Turbine ◽  
Dynamic Characteristics ◽  
System Analysis ◽  
Reference Conditions ◽  
Thermal Characteristics ◽  
Analysis Model ◽  
Characteristics Analysis ◽  
Extraction Unit ◽  
Pressure Extraction ◽  
Double Extraction

This paper is study on the 330MW Double-extraction unit, made by Dongfang Steam Turbine Works manufactured, and the reference conditions of the unit was calculated. Thermal system analysis and calculated of double-extraction unit based on the equivalent enthalpy drop and variable condition calculation methods, and double-extraction steam turbine dynamic characteristics analysis model is established through a series of dynamic characteristics. The result showed that the smaller error between the calculated value and the design value of this model, and it can be applied to single extraction and condensed various working conditions. In addition, four variables of the unit main steam flow, low-pressure extraction flow, medium pressure extraction flow and electric power was fitted, resulting in multi-characteristic equation, which provides a theoretical basis for the follow-up study online load distribution.

Conceptual design and analysis of a megawatt power level heat pipe cooled space reactor power system

2020 ◽  
Vol 144 ◽  
pp. 107576
Author(s):  
Wenwen Zhang ◽  
Dalin Zhang ◽  
Chenglong Wang ◽  
Wenxi Tian ◽  
Suizheng Qiu ◽  
...  
Keyword(s):  
Power System ◽  
Heat Pipe ◽  
Conceptual Design ◽  
Power Level ◽  
Reactor Power ◽  
Space Reactor

Thermal-hydraulic analysis of the thermoelectric space reactor power system with a potassium heat pipe radiator

2020 ◽  
Vol 136 ◽  
pp. 107018 ◽  
Author(s):  
Wenwen Zhang ◽  
Dalin Zhang ◽  
Xiao Liu ◽  
Wenxi Tian ◽  
Suizheng Qiu ◽  
...  
Keyword(s):  
Power System ◽  
Heat Pipe ◽  
Reactor Power ◽  
Hydraulic Analysis ◽  
Space Reactor ◽  
Thermal Hydraulic Analysis

Development of a Hybrid Simulator for Power System Analysis for a High Penetration of Distributed Generations

2016 ◽  
Vol 136 (1) ◽  
pp. 63-71
Author(s):  
Ryouhei Kitagawa ◽  
Teruo Takagi ◽  
Koichi Yokoi ◽  
Kimihiko Shimomura ◽  
Atsushi Harada ◽  
...  
Keyword(s):  
Power System ◽  
System Analysis ◽  
Distributed Generations ◽  
Power System Analysis ◽  
High Penetration ◽  
Hybrid Simulator

Markov Jump Linear System Analysis of a Microgrid Operating in Islanded and Grid Tied Modes

2020 ◽  
Author(s):  
Gilles Mpembele ◽  
Jonathan Kimball
Keyword(s):  
Monte Carlo ◽  
Power Systems ◽  
Power System ◽  
System Analysis ◽  
Differential Algebraic Equations ◽  
Algebraic Equations ◽  
Markov Jump ◽  
Numerical Application ◽  
Conditional Moments ◽  
Markov Jump Linear Systems

<div>The analysis of power system dynamics is usually conducted using traditional models based on the standard nonlinear differential algebraic equations (DAEs). In general, solutions to these equations can be obtained using numerical methods such as the Monte Carlo simulations. The use of methods based on the Stochastic Hybrid System (SHS) framework for power systems subject to stochastic behavior is relatively new. These methods have been successfully applied to power systems subjected to</div><div>stochastic inputs. This study discusses a class of SHSs referred to as Markov Jump Linear Systems (MJLSs), in which the entire dynamic system is jumping between distinct operating points, with different local small-signal dynamics. The numerical application is based on the analysis of the IEEE 37-bus power system switching between grid-tied and standalone operating modes. The Ordinary Differential Equations (ODEs) representing the evolution of the conditional moments are derived and a matrix representation of the system is developed. Results are compared to the averaged Monte Carlo simulation. The MJLS approach was found to have a key advantage of being far less computational expensive.</div>

Sign in / Sign up

Export Citation Format

Share Document