API 670 Machinery Protection Systems was updated in 2014. After the upgrade, higher requirements are put forward for the compressor control system. The compressor control system and interlock control are introduced. I...API 670 Machinery Protection Systems was updated in 2014. After the upgrade, higher requirements are put forward for the compressor control system. The compressor control system and interlock control are introduced. Including compressor anti surge control, performance control, turbine speed regulation control and control oil, lubricating oil, condensate control, the control of period between gas and liquid separator liquid level control, sealing gas control and overspeed protection, and some craft interlock protection system, and combined with the requirements of API 670 -- 2014 gives the solution in the practical engineering.展开更多
A large-scale compressor set of a 2 kW helium cryoplant, as one of the subsystems of EAST （the experimental advanced superconducting tokamak）, is arranged in a two-stage seriesparallel structure. A fully automatic c...A large-scale compressor set of a 2 kW helium cryoplant, as one of the subsystems of EAST （the experimental advanced superconducting tokamak）, is arranged in a two-stage seriesparallel structure. A fully automatic control system used to handle the compressors＇ on/off/ scheduling and the pressures＇ adjustment was developed. To reduce the long time lag and the uncertainty with the energy slide valves effectively, expert rules in combination with proportional- integral-derivative （PID） algorithms were applied nisms were built up to reinforce its stability and to the EAST operations and is operated stably. system, such as the big overshoot of pressure and Safety protection and status analysis mecha- robustness. The new system has been applied The problems in the previous semi-automatic complexity of the operations, were solved.展开更多
The dynamic research of aircraft environmental control system (ECS) is an important step in the advanced ECS design process. Based on the thermodynamics theory, mathematical models for the dynamic performance simulati...The dynamic research of aircraft environmental control system (ECS) is an important step in the advanced ECS design process. Based on the thermodynamics theory, mathematical models for the dynamic performance simulating of aircraft ECS were set up and an ECS simulation toolbox (ECS_1.0) was created with MATLAB language. It consists of main component modules (ducts, valves, heat exchangers, compressor, turbine, etc.). An aircraft environmental control system computer model was developed to assist engineers with the design and development of ECS dynamic optimization. An example simulating an existing ECS was given which shows the satisfactory effects.展开更多
The use of PLC in centrifugal compressor can greatly eliminate the impact of surge, improve the reliability of compressor equipment operation. The application of this technology makes the maintenance of centrifugal co...The use of PLC in centrifugal compressor can greatly eliminate the impact of surge, improve the reliability of compressor equipment operation. The application of this technology makes the maintenance of centrifugal compressor easier and more economical. This paper introduces the surge of centrifugal compressor and analyzes the method of removing the surge of equipment. The characteristics and advantages of GEFANUC90 -30PLC system are studied.展开更多
In this paper, the design of the centrifugal compressor, how scientific and rational design can effectively avoid the happening of compressor surge, combined with the current centrifugal compression pant of vibration ...In this paper, the design of the centrifugal compressor, how scientific and rational design can effectively avoid the happening of compressor surge, combined with the current centrifugal compression pant of vibration control main method and the scientific method, the system shows that the causes of the formation of compressor surge, the surge design the main principle, how to efficiently control the difficulty of implementing compression pant of vibration technology, and proposes the corresponding improvement measures are the main purpose is to improve the normal operation of the centrifugal compressor.展开更多
To prevent the oxygen starvation and improve the system output performance, an adaptive inverse control （AIC） strategy is developed to regulate the air supply flow of a proton exchange membrane fuel cell （PEMFC） s...To prevent the oxygen starvation and improve the system output performance, an adaptive inverse control （AIC） strategy is developed to regulate the air supply flow of a proton exchange membrane fuel cell （PEMFC） system in this paper. The PEMFC stack and the air supply system including a compressor and a supply manifold are modeled for the purpose of performance analysis and controller design. A recurrent fuzzy neural network （RFNN） is utilized to identify the inverse model of the controlled system and generates a suitable control input during the abrupt step change of external disturbances. Compared with the PI controller, numerical simulations are performed to validate the effectiveness and advantages of the proposed AIC strategy.展开更多
A numerical methodology for investigating compressor instabilities in a multistage environment is presented. The method is based on a stage-by-stage dynamic compression model and considers air compressibility explicit...A numerical methodology for investigating compressor instabilities in a multistage environment is presented. The method is based on a stage-by-stage dynamic compression model and considers air compressibility explicitly throughout the compressor. It involves discretizing the compression system into distinct elements and a use of the local elemental characteristic of mean performance. The models are presented in both nonlinear and linearized forms. The linearised form permits well surge condition prediction for multistage axial compressors, while the non-linear form is able to investigate the growth of local flow disturbances, and helps to develop practical control strategy. Validations were carried out using the data from several aircraft engine compressors. A good experiment-model consistency is achieved.展开更多
[目的]压缩机和空气透平是压缩空气储能电站两大关键设备,其控制通常由设备自带控制系统实现,控制较为分散,调节过程复杂。随着分布式控制系统(Distributed Control System,DCS)一体化技术的提出,开展压缩空气储能电站DCS一体化技术具...[目的]压缩机和空气透平是压缩空气储能电站两大关键设备,其控制通常由设备自带控制系统实现,控制较为分散,调节过程复杂。随着分布式控制系统(Distributed Control System,DCS)一体化技术的提出,开展压缩空气储能电站DCS一体化技术具有重要意义。[方法]文章从DCS系统、压缩机控制系统、空气透平控制系统分析了压缩空气储能电站当前研究情况,提出了3种DCS一体化思路,分析了压缩空气储能电站实现DCS一体化的可行性及DCS一体化的优势,并探究了DCS一体化配置方案。[结果]通过压缩空气储能电站分析,电站实现一体化的难点在于压缩机和空气透平控制系统,分析结果表明,两大设备实现DCS一体化在技术上是完全可行的。[结论]通过介绍压缩空气储能电站全厂DCS一体化设计分析,为后续压缩空气储能电站DCS一体化方案设计提供了思路和方向,对压缩空气储能电站实现集中控制提供了方法。展开更多
文摘API 670 Machinery Protection Systems was updated in 2014. After the upgrade, higher requirements are put forward for the compressor control system. The compressor control system and interlock control are introduced. Including compressor anti surge control, performance control, turbine speed regulation control and control oil, lubricating oil, condensate control, the control of period between gas and liquid separator liquid level control, sealing gas control and overspeed protection, and some craft interlock protection system, and combined with the requirements of API 670 -- 2014 gives the solution in the practical engineering.
基金supported by National Meg-science Engineering Project of the Chinese Government,[1998]1303
文摘A large-scale compressor set of a 2 kW helium cryoplant, as one of the subsystems of EAST （the experimental advanced superconducting tokamak）, is arranged in a two-stage seriesparallel structure. A fully automatic control system used to handle the compressors＇ on/off/ scheduling and the pressures＇ adjustment was developed. To reduce the long time lag and the uncertainty with the energy slide valves effectively, expert rules in combination with proportional- integral-derivative （PID） algorithms were applied nisms were built up to reinforce its stability and to the EAST operations and is operated stably. system, such as the big overshoot of pressure and Safety protection and status analysis mecha- robustness. The new system has been applied The problems in the previous semi-automatic complexity of the operations, were solved.
文摘The dynamic research of aircraft environmental control system (ECS) is an important step in the advanced ECS design process. Based on the thermodynamics theory, mathematical models for the dynamic performance simulating of aircraft ECS were set up and an ECS simulation toolbox (ECS_1.0) was created with MATLAB language. It consists of main component modules (ducts, valves, heat exchangers, compressor, turbine, etc.). An aircraft environmental control system computer model was developed to assist engineers with the design and development of ECS dynamic optimization. An example simulating an existing ECS was given which shows the satisfactory effects.
文摘The use of PLC in centrifugal compressor can greatly eliminate the impact of surge, improve the reliability of compressor equipment operation. The application of this technology makes the maintenance of centrifugal compressor easier and more economical. This paper introduces the surge of centrifugal compressor and analyzes the method of removing the surge of equipment. The characteristics and advantages of GEFANUC90 -30PLC system are studied.
文摘In this paper, the design of the centrifugal compressor, how scientific and rational design can effectively avoid the happening of compressor surge, combined with the current centrifugal compression pant of vibration control main method and the scientific method, the system shows that the causes of the formation of compressor surge, the surge design the main principle, how to efficiently control the difficulty of implementing compression pant of vibration technology, and proposes the corresponding improvement measures are the main purpose is to improve the normal operation of the centrifugal compressor.
基金Project supported by the National Natural Science Foundation of China (Grant No.20576071)the Natural Science Foundation of Shanghai Municipality (Grant No.08ZR1409800)
文摘To prevent the oxygen starvation and improve the system output performance, an adaptive inverse control （AIC） strategy is developed to regulate the air supply flow of a proton exchange membrane fuel cell （PEMFC） system in this paper. The PEMFC stack and the air supply system including a compressor and a supply manifold are modeled for the purpose of performance analysis and controller design. A recurrent fuzzy neural network （RFNN） is utilized to identify the inverse model of the controlled system and generates a suitable control input during the abrupt step change of external disturbances. Compared with the PI controller, numerical simulations are performed to validate the effectiveness and advantages of the proposed AIC strategy.
基金This project is supported by National Natural Science Foundation of China (No.50146014) National Natural Science Foundation of Xi'an Jiaotong University, China (No.573023).
文摘A numerical methodology for investigating compressor instabilities in a multistage environment is presented. The method is based on a stage-by-stage dynamic compression model and considers air compressibility explicitly throughout the compressor. It involves discretizing the compression system into distinct elements and a use of the local elemental characteristic of mean performance. The models are presented in both nonlinear and linearized forms. The linearised form permits well surge condition prediction for multistage axial compressors, while the non-linear form is able to investigate the growth of local flow disturbances, and helps to develop practical control strategy. Validations were carried out using the data from several aircraft engine compressors. A good experiment-model consistency is achieved.
文摘[目的]压缩机和空气透平是压缩空气储能电站两大关键设备,其控制通常由设备自带控制系统实现,控制较为分散,调节过程复杂。随着分布式控制系统(Distributed Control System,DCS)一体化技术的提出,开展压缩空气储能电站DCS一体化技术具有重要意义。[方法]文章从DCS系统、压缩机控制系统、空气透平控制系统分析了压缩空气储能电站当前研究情况,提出了3种DCS一体化思路,分析了压缩空气储能电站实现DCS一体化的可行性及DCS一体化的优势,并探究了DCS一体化配置方案。[结果]通过压缩空气储能电站分析,电站实现一体化的难点在于压缩机和空气透平控制系统,分析结果表明,两大设备实现DCS一体化在技术上是完全可行的。[结论]通过介绍压缩空气储能电站全厂DCS一体化设计分析,为后续压缩空气储能电站DCS一体化方案设计提供了思路和方向,对压缩空气储能电站实现集中控制提供了方法。
