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Simulation and analysis of temperature of aviation engine fuel system based on Flowmaster software

Hangkong Dongli Xuebao/Journal of Aerospace power 2020年第4期35卷 722-731页

作者： Kang, Sizhao Xi, Xiuzhi Li, Bo Zhang, Bo Key Laboratory of Complex Energy Conversion and Utilization School of Energy and Power Engineering Dalian University of Technology DalianLiaoning116024 China Aero Engine Control System Institute Aero Engine Corporation of China WuxiJiangsu214063 China

In order to study temperature rise of the fuel system under constant and variable speeds, based on the Flowmaster software and the Daqing RP-3, the aeroengine fuel system simulation model was established, the temperature simulation of engine was carried out, and experiment and simulation results were compared to verify the accuracy. Results showed that: the performance curve of components led to the calculation error. The maximum temperature was in the front of the main combustion chamber, up to 145℃ in some working cases, which could affect the safety of aeroengine, so the temperature of fuel must be controlled. The measure of taking fuel returning to the aircraft was useful. The temperature could not immediately achieve steady when the mass flow was instantly changed. With the rise of main combustion chamber flow, the fuel temperature declined when the returning mass flow was 0kg/s and the centrifugal pump efficiency under different working conditions was equal. The temperature also achieved steady when mass flow was at a steady state. The calculation method of fuel temperature and fuel pump is proposed for the one-dimensional simulation further research of aviation engine system level. © 2020, Editorial Department of Journal of Aerospace power. All right reserved.

关键词： Fuels

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MILP model for annual power and energy balance of hydro-thermal-wind power system considering RPS mechanism

MILP model for annual power and energy balance of hydro-ther...

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8th Renewable power Generation Conference (RPG 2019)

作者： Danyang Zhao Wei Yan Cheng Luo Tian Luo State Key Laboratory of Power Transmission Equipment & System Security and New Technology (Chongqing University) Chongqing 400043 China Chongqing Electric Power College Chongqing 400050 China Key Laboratory of Control of Power Transmission and Conversion Ministry of Education (Shanghai Jiao Tong University) Shanghai 200240 China

ISBN: (数字)9781839531248

ISBN: (纸本)9781839531255

As more mandatory policies including Renewable Energy Portfolio Standard (RPS) in China have been introduced to promote renewable generations, traditional power balancing models may become no longer applicable to economically satisfy such ambitious goals. From the perspective of Chinese provincial power grid companies, proper scheduling could increase the penetration of renewable energy sources so as to meeting the urgent RPS requirements. In order to economically schedule annual power generations with consideration of RPS requirements and safety constraints, this paper proposes an annual power and energy balancing model of hydro-thermal-wind power system. The model aims to minimize the cost of power generation under the implementation of the RPS mechanism in China. Regional power grid's power balance constraints, the RPS constraints, hydropower monthly coordination as well as safety constraints including the operational characteristic constraints of hydropower, thermal power and wind power generator units have been considered. The model is formulated as mixed integer linear programming (MILP) problem, which is solved by CPLEX. Based on the data of a certain provincial power grid, the simulation results verify the effectiveness of the model.

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Performance Comparison of Load Frequency control for power system by ADRC Approach and PID controller

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Journal of Physics: Conference Series 2020年第1期1510卷

作者： Mohammed. A. Abdalla Guotian Yang Congzhi Huang School of Control and Computer Engineering North China Electric Power University Beijing China Key Laboratory of Power Station Energy Transfer Conversion and System North China Electric Power University Beijing China

Load Frequency control (LFC) is the main problem of power networks which outcomes because of mismatch between real power generation and consumption as the power consumption changes every period. therefore, the frequency of the power system may not be at rated value resulting in power quality problems. Hence, the aim of LFC is to reduce the transient changes of area frequency and tie-line power transfer maintaining them at steady state. Moreover, the external disturbances and uncertainty factors, as well as parameters of the power system, causes a big problem for controller design in LFC. Therefore, this research describes a comparative consideration for Active Disturbance Rejection control (ADRC) based LFC as an operational control strategy, which requires few information from the plant model and being robust against disturbances and uncertainties. Two intelligent controllers Particle Swarm Optimization (PSOA) Algorithm, Bacterial Foraging Optimization (BFO) mechanism are used for tuning Proportional Integral Derivative (PID) controller based LFC to acquire optimal values, taking into consideration single-area power system. The simulation results exhibit that the ADRC can obtain better performance than PID tuned by BFO and PSO in terms of frequency deviation and settling time.

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Analysis on Application of a Current-source Based DFIG Wind Generator Model

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CSEE Journal of power and Energy systems 2018年第3期4卷 352-361页

作者： Jin Ma Dawei Zhao Liangzhong Yao Minhui Qian Koji Yamashita Lingzhi Zhu School of Electrical&Electronic Engineering North China Electric Power University(State Key Laboratory of Alternate Electrical Power System with Renewable Energy Sources)Beijing 102206China Renewable Energy Research Center China Electric Power Research Institute(State Key Laboratory of Operation and Control of Renewable Energy&Storage SystemsJiangsu Engineering Technology Research Center for Energy Storage Conversion and Application)Nanjing 210003China Power System Sector Central Research Institute of Electric Power IndustryTokyo 201-8511Japan

Models for simulation are vital for the authenticity of the *** doubly fed induction generation(DFIG)for power system stability analysis has attracted a great deal of research interests in the past few years due to the wide applications of DFIG in wind power *** models developed by the wind generator manufacturers are not only complicated,but also proprietary and very specific to their own *** simplified generic models have been *** them,the current-source based model is most widely used for power system stability *** validation work on this model so far has been based on the selected simulation scenarios or limited real ***,there has been no systematic and theoretic analysis on the validity of the current-source based model,which may cause inappropriate applications of this type of model in real engineering *** paper presents the conditions for using the current-source based model for power system stability analysis;then examines the model’s validity under symmetrical and asymmetrical fault *** practices for modeling and validating a real wind farm in North China confirm the validity analysis of this work on the current-source based DFIG model.

关键词： Applicationanalysis current-source doublyfed induction generation(DFIG) modelvalidation

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control of Nonlinear Constrained Ultra-Supercritical Boiler–Turbine Units Using Offset-Free Output-Feedback Stable MPC

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IFAC-PapersOnLine 2018年第28期51卷 155-160页

作者： Chen, Chen Pan, Lei Shen, Jiong Lee, Kwang Y. Zhang, Fan Sun, Li Wu, Xiao Zhang, Junli Xue, Wenchao Key Laboratory of Energy Thermal Conversion and Control of Ministry of Education Southeast University Nanjing210096 China Department of Electrical and Computer Engineering Baylor University One Bear Place #97356 WacoTX76798-7356 United States State Key Lab of Power System Department of Energy and Power Engineering Tsinghua University Beijing100084 China Academy of Mathematics and Systems Science Chinese Academy of Sciences Beijing China

It is extremely challenging to control ultra-supercritical boiler–turbine unit on account of its nonlinearity, coupling among multi-variables, hard input constraints, and unknown disturbances. An offset-free output-feedback stable model predictive control (MPC) (OFOF-SMPC) for nonlinear constrained ultra-supercritical boiler-turbine units is investigated. It is shown that the OFOF-SMPC is composed of a disturbance and state observer, a steady-state target calculator as well as a stable MPC, which can remove unknown disturbances from output channels and ensure the stability of the closed-loop system with input constraints. Simulation results demonstrate the effectiveness of the proposed algorithm. © 2018

关键词： Feedback

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A Data-Driven Architecture Design of Stream Computing for the Dispatch and control system of the power Grid

A Data-Driven Architecture Design of Stream Computing for th...

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IEEE Conference on Energy Internet and Energy system Integration (EI2)

作者： Zhihua Wang Jucheng Xiao Kunqi Jia Feng Gao Yuanhe Tang Guangyu He Electric Power Dispatching and Control Center State Grid Shanghai Municipal Electric Power Company Shanghai China Laboratory of Control of Power Transmission and Conversion Ministry of Education Shanghai Jiao Tong University Shanghai China System R&D Center NARI Group Corporation NARI Technology Co. Ltd Nanjing China

Physical distribution and logical unification are the crucial features of the future power grid dispatch system, which requires transmitting, processing and storing massive amounts of information. However, the traditional centralized system cannot meet these requirements. Therefore, this paper introduces the big data distribution stream processing technology, and proposes a stream computing framework suitable for the dispatch and control system of the power grid, including task definition, communication queue management, task assignment, task monitoring and task migration. Aiming at solving the problem of poor system extensibility caused by the high coupling of model data and real-time data in current SCADA system, a data decoupling method based on the separation of the dynamic date and static data is proposed, and the task decomposition of real-time data processing is adopted as a case study of the stream computing framework for the dispatch system. The stream computing framework can continuously process the borderless acquired data, and meet the requirements of real-time data distribution storage and interaction for the wide-area dispatch system of the power system.

关键词： Task analysis Real-time systems Data processing control systems Computational modeling Data models Process control

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A Closed Loop Operation Analysis Software Based on the Integrated Model of the Entire power Grid

A Closed Loop Operation Analysis Software Based on the Integ...

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IEEE Conference on Energy Internet and Energy system Integration (EI2)

作者： Kunqi Jia Qitao Yuan Zhihua Wang Hongfu Chen Xi Xu Guangyu He Laboratory of Control of Power Transmission and Conversion Ministry of Education Shanghai Jiao Tong University Shanghai China Electric Power Dispatching and Control Center State Grid Shanghai Municipal Electric Power Company Shanghai China System R&D Center NARI Group Corporation NARI Technology Co. Ltd Nanjing China

The closed loop operation is a common method to improve power supply reliability of distribution network. When a distribution network dispatcher performs a closed loop operation, a large circulating current may be triggered if a suitable operating point cannot be selected, which will cause the protection action and deteriorate the reliability of the power supply and the stability of the system's safe operation. Closed loop operation risk analysis software can provide good technical support for dispatchers. However, because the existing analysis software is always hard to obtain the complete grid model and equipment parameters, the equivalent model can only be used for approximate calculation, which makes the analysis performance discounted. Therefore, a closed loop operation analysis software based on the integrated model of the entire power grid is proposed in this paper. The software is based on the state estimation results obtained from the wide area service bus. The case studies demonstrate that it can establish an entire grid-based integrated calculation model and provide basic data analysis for the electromagnetic loop checking, so that the centralized analysis and decision making of the closed loop operation can be supported and the accuracy of the electromagnetic loop can be improved.

关键词： power grids Impedance Low voltage Electromagnetics power system stability Thermal stability Analytical models

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Erratum: “Research status of replacement gases for SF6 in power industry” [AIP Adv. 10, 050702 (2020)]

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AIP Advances 2020年第9期10卷

作者： Shuangshuang Tian Xiaoxing Zhang Yann Cressault Juntai Hu Bo Wang Song Xiao Yi Li Narjisse Kabbaj 1Hubei Key Laboratory for High-efficiency Utilization of Solar Energy and Operation Control of Energy Storage System Hubei University of Technology Wuhan 430068 China 2LAPLACE (Laboratoire Plasma et Conversion d’Energie) UPS INPT Université de Toulouse 118 route de Narbonne CO F-31062 Toulouse Cedex 9 France 3State Grid Pingdingshan Power Supply Company Pingdingshan 467001 China 4School of Electrical Engineering Wuhan University Wuhan 430072 China

The authors regret that there are two errors in Table II of their article:1

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Cascaded PI controller Tuning for power Plant Superheated Steam Temperature based on Multi-Objective Optimization

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IFAC-PapersOnLine 2017年第1期50卷 3227-3231页

作者： Fu H. Pan L. Xue Y.L. Sun L. Li D.H. Lee K.Y. Wu Z.L. He T. Zheng S. Key Laboratory of Energy Thermal Conversion and Control of Ministry of Education Southeast University Nanjing 210096 China State Key Lab of Power System Department of Thermal Engineering Tsinghua University Beijing China Department of Electrical and Computer Engineering Baylor University Waco TX 76798 United States Department of Automation Fuzhou University Fuzhou 350000 China

To improve the superheated steam temperature (SST) control performance, this paper considers the conflicting objectives in SST control, multi-objective optimization (MOO) algorithm is employed in this paper. Firstly, the inner-loop PI controller is optimized by considering the objectives of set-point tracking and disturbance rejection, with and without constraints on robustness level. It is found that robustness constraint is essential in the optimization. Secondly, the regulation performance of the outer-loop PI controller is addressed by optimizing the disturbance rejection and robustness simultaneously. The parameter are determined based on the simulation comparison between the non-dominated solutions. The simulation results demonstrate a promising prospect of promoting the proposed strategy to more industrial practices. © 2017

关键词： Disturbance rejection Pareto optimization power plant control Robustness Superheated steam temperature

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The Stabilization of Coordinated Distributed Model Predictive control *

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IFAC Proceedings Volumes 2013年第13期46卷 182-187页

作者： Y. Zheng S.Y. Li School of Electronic Information and Electrical Engineering Shanghai Jiao Tong University Key Laboratory of Control of Power Transmission and Conversion Ministry of Education Road Shanghai 200240 China Department of Automation Shanghai Jiao Tong University Key Laboratory of System Control and Information Processing Ministry of Education of China Shanghai 200240 China (Tel: 34204011 )

A stabilized Distributed MPC for large scale system is proposed and its designation is given in this paper for improving the global performance of closed-loop system. To make the performance of closed-loop system more close to that using centralized MPC, each subsystem-based MPC added the cost of the entire system into its optimization cost function. In addition, a consistency constraint and dual mode strategy are designed and adopted. Provided an initially feasible solution can be found, subsequent feasibility of the algorithm is guaranteed at every update, and the asymptotic stabilization is established.

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