An electromagnetic field is generated through the accelerating movement of two equal but opposite charges of a single dipole. An electromagnetic field can also be generated by a time-varying infinitesimal point charge...An electromagnetic field is generated through the accelerating movement of two equal but opposite charges of a single dipole. An electromagnetic field can also be generated by a time-varying infinitesimal point charge. In this study, a comparison between the electromagnetic fields of an infinitesimal point charge and a dipole has been presented. First, the time-domain potential function of a point source in a 3D conductive medium is derived. Then the electric and magnetic fields in a 3D homogeneous lossless space are derived via the relation between the potential and field. The field differences between the infinitesimal point charge and the dipole in the step-off time, far-source, and near-source zones are analyzed, and the accuracy of the solutions from these sources is investigated. It is also shown that the field of the infinitesimal point charge in the near-source zone is different from that of the dipole, whereas the far-source zone fields of these two sources are identical. The comparison of real and simulated data shows that the infinitesimal point charge represents the real source better than the divole source.展开更多
Formation of a quasi-stationary discharge or quasi-stationary emission mode in the explosive-emission electron sources is related to the current limitation resulting from the emissive ability saturation of cathode pla...Formation of a quasi-stationary discharge or quasi-stationary emission mode in the explosive-emission electron sources is related to the current limitation resulting from the emissive ability saturation of cathode plasma with its expansion. The paper shows that in the process of the discharge current stabilization in the explosive-emission sources with the point- or blade-type emitters the essential role belongs to the electron beam space charge. Availability of the space charge results in limitation of the current growth velocity at the initial discharge phase and, hence, restricts the emissive ability of the cathode plasma and contributes to its saturation. In the vacuum diodes with multiemitter cathodes, the space charge availability increases the cathode operation stability and can provide obtaining of quasi-stationary beam current values or close to them resulting in formation of a plasma emission surface at the cathode close to the continuous one.展开更多
A new 14.5 GHz Electron Cyclotron Resonance (ECR) ion source has been constructed over the last two years. The source was designed and tested by making use of the latest results from ECR ion source development, such a...A new 14.5 GHz Electron Cyclotron Resonance (ECR) ion source has been constructed over the last two years. The source was designed and tested by making use of the latest results from ECR ion source development, such as high mirror magnetic field, large plasma volume, and biased probe. 140uA of O^7+, 185uA of Ar^11+ and 50uA of Xe^26+ could be produced with a RF power of 800 W. The intense beams of highly charged metallic ions are produced by means of the method of a metal evaporation oven and volatile compound through axial access. The test results are 130uA of Ca^11+, 70uA of Ca^12+ and 65uA of Fe^lo+. The ion source has been put into operation for the cyclotron at the institute of Modern Physics (IMP).展开更多
The Lukeqin structural belt is the main heavy oil accumulation zone in the Turpan-Hami Basin. The recent discovery of light oil in the Triassic indicates that there may be multiple source kitchens contributing to the ...The Lukeqin structural belt is the main heavy oil accumulation zone in the Turpan-Hami Basin. The recent discovery of light oil in the Triassic indicates that there may be multiple source kitchens contributing to the oil accumulation. According to oil geochemical analysis and oil-source correlation, the oil in deep and shallow reservoirs of the Lukeqin Oilfield presents different physical and saturated hydrocarbon mass spectrum characteristics. The Triassic heavy oil is from the northern Upper Permian lacustrine source rocks, and the light oil represented by the Yudong-9 Well is from the northwestern Lower Jurassic coal-measure source rocks. The timing of oil charging was determined by K/Ar isotope dating, reservoir fluid inclusion analysis and the evolution history of different source rocks. In summary, the accumulation process consists of two stages. From the end of Triassic to early Jurassic, the northern Permian source kitchen generated a considerable amount of oil, which was finally degraded to heavy oil, migrated to the south and then accumulated. The northwestern Jurassic coal-measure source kitchen began to generate oil at the end of Cretaceous, while the northern source kitchen could only generate a little hydrocarbon. The heavy oil and the light oil have different source rock locations, migration directions and accumulation times. The migration of hydrocarbon source kitchens affects the distribution of heavy oil and light oil reservoirs at the present time.展开更多
This paper presents a conceptual design for the first tentative surface muon source based on the proton beam provided by China Spallation Neutron Source （CSNS）. We have calcu- lated the optimal parameters of solid m...This paper presents a conceptual design for the first tentative surface muon source based on the proton beam provided by China Spallation Neutron Source （CSNS）. We have calcu- lated the optimal parameters of solid muon target, in which the method of Monte Carlo simula- tion is used to obtain the optimal muon beam parameters, such as beam fiuence rate, momentum spread and phase space distribution. A simple muon transport beamline system was also designed, which could transport the muons emitted from the muon target into the experimental area, where positrons from muon decay in a test sample are detected by a spectrometer. The beam optics of this new beam line is also described.展开更多
Parameters of the power source used to control PV-10 piezoelectric crystal valve are following DC output voltage： 0 - 120 V, continuously controllable, linear enlargement factor of input direct current voltage： appr...Parameters of the power source used to control PV-10 piezoelectric crystal valve are following DC output voltage： 0 - 120 V, continuously controllable, linear enlargement factor of input direct current voltage： approximate 25 times, the accuracy of DC output voltage： ±5%, manual control and automatic control.展开更多
Charge breeding technique is used for RIB （radioactive ion beam） production in order of optimizing the re-acceleration of the radioactive isotopes produced by a primary beam in a thick target. Charge breeding is ach...Charge breeding technique is used for RIB （radioactive ion beam） production in order of optimizing the re-acceleration of the radioactive isotopes produced by a primary beam in a thick target. Charge breeding is achieved by means of a device capable of increasing the ion charge state from 1＋ to a desired value n＋. In some experiments, a continuous RIB of a given energy may be required. To reach this goal, a charge breeding device based on a hollow gun EBIS （electron beam ion source） has been proposed by the author recently. That EBIS, in principle, can be capable to realize a CW （continuous wave） operation. A sufficiently high focusing magnetic field could reduce to zero the hole radius in the EBIS electron beam. However, a smaller efficiency in the ion charge state increase should be expected. A code developed for studying the ion selective containment in a EBIS has been modified and used to simulate the ion charge state breeding. The effects of the hollow electron beam on the breeding rate have been studied.展开更多
A control strategy of repetitive control without inductorance decoupling was proposed to address the problem of high total harmonic distortion(THD)rate of the network-side current caused by the reduced stability of th...A control strategy of repetitive control without inductorance decoupling was proposed to address the problem of high total harmonic distortion(THD)rate of the network-side current caused by the reduced stability of the rectifier module of the DC charging pile under weak grid as well as the dead zone and nonlinearity of switching devices during charging.Firstly,the parallel repetitive control was constructed in the inner current loop,and the proportional-integral(PI)+repetitive controller based on parallel structure was designed.For system compensation,a second-order low-pass filter was selected to correct the system,and the network-side current harmonics were actively suppressed without increasing the filtering device,which effectively improves the quality of grid-connected current.Secondly,based on the synthetic vector method,the controller parameters were designed to realize the elimination of main pole by establishing two synchronous rotation coordinate system vector differential equations,so as to realize the inductanceless decoupling to cope with the influence of network-side inductance fluctuation on the stability of the control system under weak grid.By theoretical analysis and simulation,the proposed control strategy was embedded into the self-developed digital signal processor for the rectifier module of DC charging pile,simulated dynamic and steady-state operation experiments were conducted,and comparative analysis was performed to prove the feasibility of the proposed control strategy.展开更多
This paper proposes a design and control approach to parallel resonant converter(PRC) based battery chargers.The proposed approach is particularly suitable for the constant-current constant-voltage(CC-CV)charging meth...This paper proposes a design and control approach to parallel resonant converter(PRC) based battery chargers.The proposed approach is particularly suitable for the constant-current constant-voltage(CC-CV)charging method, which is the most commonly utilized one.Since the PRC is operated at two different frequencies for each CC and CV charging modes, this approach eliminates the need for complicated control techniques such as the frequency-control and phase-shift-control.The proposed method not only simplifies the design and implementation processes of the converter unit but also simplifies the design of output filter configuration and decreases the number of the required components for the control of the charger.The proposed method is confirmed by two experimental setups.The results show that the designed charger circuit ensured a very stable constant current in CC charging phase, where the charging current is fixed to 1.75 A.Although a voltage increase in CV phase is observed, the charger circuit is able to decrease the charging current to 0.5 A in CV phase, as depicted in battery data-sheet.The efficiency of the charger is figured out to be in the range of 86%-93% in the first setup, while it is found to be in the range of 78%-88% in the second setup,where a high frequency transformer is employed.展开更多
This paper discusses origin and charging histories of the Bozhong （渤中） 25-1 field （BZ25-1） in the Bozhong sub-basin, Bohai （渤海） Bay basin. Petroleum is contained in both Paleogene and Neogene reservoirs in t...This paper discusses origin and charging histories of the Bozhong （渤中） 25-1 field （BZ25-1） in the Bozhong sub-basin, Bohai （渤海） Bay basin. Petroleum is contained in both Paleogene and Neogene reservoirs in the BZ25-1 field. The origin of the field was studied using biomarker distri-butions for 61 source rock samples and 34 oil samples. Oil in the Paleogene reservoirs was derived from the third member （Es3, 43.0-38.0 Ma in age） of the Eocene Shahejie （沙河街） Formation, whereas oil in the Neogene reservoirs was a mixtures of oil generated from the third member and the first member （Es1, 35.8-32.8 Ma） of the Eocene Shahejie Formation. Charging of the shallow Neogene reservoirs was dynamic, probably ongoing, which was a combined result of the existence of active source rocks, the development of overpressure and the fault reactivation since about 5.1 Ma. On the contrary, the deep Paleogene reservoirs experienced intensive oil leakage as indicated by the high GOI （grains-containing-oil-inclusions） values （up to 30%） for samples below the present-day oil-water con-tact. Part of the oil that leaked from the Paleogene reservoirs re-accumulated in the shallow Neogene reservoirs. The variation of oil origins within the BZ25-1 field, and the dynamic petroleum charging into the shallow Neogene reservoirs and leakage from the deep Paleogene reservoirs have important implications for petroleum exploration.展开更多
A new radioactive beam facility for ATLAS,the Californium Rare Ion Breeder Upgrade (CARIBU), is under construction.The facility will use fission fragments from a 1 Ci ^(252)Cf source;thermalized and collected into a l...A new radioactive beam facility for ATLAS,the Californium Rare Ion Breeder Upgrade (CARIBU), is under construction.The facility will use fission fragments from a 1 Ci ^(252)Cf source;thermalized and collected into a low-energy beam by a helium gas catcher.In order to reaccelerate these beams,the existing ATLAS ECR-I ion source is being redesigned to function as a charge breeder source.The design and features of this charge breeder configuration is discussed and the project status described.展开更多
Minfeng sub-sag in the Bohai Bay Basin was taken as an example.The Wells Yanxie 233,Yongxie 932 and Yan 22 were selected for on-site carbon isotope detection.Then,based on sufficient carbon isotope datawhich were acqu...Minfeng sub-sag in the Bohai Bay Basin was taken as an example.The Wells Yanxie 233,Yongxie 932 and Yan 22 were selected for on-site carbon isotope detection.Then,based on sufficient carbon isotope datawhich were acquired on the drilling site using the brand-new carbon isotopic measuring instrument,the carbon i sotope dataand composition data of natural gas produced in this areawerecompared.Andcombined with the evolution of source rocks,the geochemical characteristics of crude oil,the depositional environment of reservoirs and the physical properties,single-well charging characteristics and regional charging area ofnatural gas wereanalyzed.Finally,the feasibility of on-sitecarbon isotope detection method to discriminate hydrocarbon charging was discussed.And the following research results were obtained.First,deep hy drocarbon charging happened in thePurely Purely Lower Sha 4 Member in Well Yanxie 233,and its natural gas is the mixture of the oil cracking gas of deep layers and the thernal cracking gas of autochthonous source rocks.Second,the natural gas in the third and fourth Members ofShahejieFormation in Well Yongxie 932 is the thermale racking gas of autochthonous source rocks,but deep gas charging occurred in particularhole sections.Third,the carbon isotope of associated gas in Well block Yan 22 is high in the central area and low in both sides and high in the south and low in the north,which is accordant with the distributi on characteristics ofreservoir physicalproperties,indicating thatthe charging ofhigh-maturity natural gas is under the control of reservoir physical properties.Fourth,the oil in Well block Yan 22 is the product of autochthonous source rocks in the mature stage while the natural gas is the autochthonous oil-associated gas combined with the charging of deep high-maturity product.It is concluded that there is a high-maturity hydrocarbon charging area in the northwest of the northern slope of the Minfeng sub-sag,and it is a favorable hydrocarbon exploration target.What's more,the on-site carbon isotope rapid detection technology can provide a large number of continuous three-dimensional carbon isotope data,and it can be used to quickly analyze the characteristics of Studying hydrocarbon charging isquite important for searchingexploration targets and confirming well locations.In thispaper,the north slope of the hydrocarbon charging and determine the source and ori gin of hydrocarbon,so as to provide reference for hydrocarbon development deployment.展开更多
针对可再生能源、电解槽和储能设备集成的孤岛直流微电网制氢系统,提出了1种考虑储能荷电状态(state of charge,SoC)的优化控制策略.首先,对碱性电解槽的制氢效率特性进行分析,提出了1种制氢效率随母线电压变化而自适应调整的优化控制方...针对可再生能源、电解槽和储能设备集成的孤岛直流微电网制氢系统,提出了1种考虑储能荷电状态(state of charge,SoC)的优化控制策略.首先,对碱性电解槽的制氢效率特性进行分析,提出了1种制氢效率随母线电压变化而自适应调整的优化控制方法,通过与储能系统协调互补,将制氢效率保持在较高的范围内.当储能SoC越过上下限时,设计了1种不依赖通信的SoC主动恢复控制策略,确保储能系统的安全运行.其次,设计了1种考虑极端工况下的功率协调控制策略,通过各个运行模式之间的灵活切换来保证直流微电网的稳定运行.最后,通过MATLAB/Simulink仿真平台对所提控制策略的有效性进行了验证.展开更多
基金supported by Chinese National Programs for Fundamental Research and Development(No.2012CB416605)the National Natural Science Foundation of China(No.41174090)Development Project of National Key Scientific Equipment(No.ZDYZ2012-1-05-04)
文摘An electromagnetic field is generated through the accelerating movement of two equal but opposite charges of a single dipole. An electromagnetic field can also be generated by a time-varying infinitesimal point charge. In this study, a comparison between the electromagnetic fields of an infinitesimal point charge and a dipole has been presented. First, the time-domain potential function of a point source in a 3D conductive medium is derived. Then the electric and magnetic fields in a 3D homogeneous lossless space are derived via the relation between the potential and field. The field differences between the infinitesimal point charge and the dipole in the step-off time, far-source, and near-source zones are analyzed, and the accuracy of the solutions from these sources is investigated. It is also shown that the field of the infinitesimal point charge in the near-source zone is different from that of the dipole, whereas the far-source zone fields of these two sources are identical. The comparison of real and simulated data shows that the infinitesimal point charge represents the real source better than the divole source.
文摘Formation of a quasi-stationary discharge or quasi-stationary emission mode in the explosive-emission electron sources is related to the current limitation resulting from the emissive ability saturation of cathode plasma with its expansion. The paper shows that in the process of the discharge current stabilization in the explosive-emission sources with the point- or blade-type emitters the essential role belongs to the electron beam space charge. Availability of the space charge results in limitation of the current growth velocity at the initial discharge phase and, hence, restricts the emissive ability of the cathode plasma and contributes to its saturation. In the vacuum diodes with multiemitter cathodes, the space charge availability increases the cathode operation stability and can provide obtaining of quasi-stationary beam current values or close to them resulting in formation of a plasma emission surface at the cathode close to the continuous one.
基金Equipment Upgrading Fund and '9.5' Fund for Fundamental Research from the Chinese Academy of Sciences
文摘A new 14.5 GHz Electron Cyclotron Resonance (ECR) ion source has been constructed over the last two years. The source was designed and tested by making use of the latest results from ECR ion source development, such as high mirror magnetic field, large plasma volume, and biased probe. 140uA of O^7+, 185uA of Ar^11+ and 50uA of Xe^26+ could be produced with a RF power of 800 W. The intense beams of highly charged metallic ions are produced by means of the method of a metal evaporation oven and volatile compound through axial access. The test results are 130uA of Ca^11+, 70uA of Ca^12+ and 65uA of Fe^lo+. The ion source has been put into operation for the cyclotron at the institute of Modern Physics (IMP).
基金supported by the Basic Research Development Program of China "Accumulation mechanisms and distribution patterns of hydrocarbon intypical superimposed basins of west China" (973 Program,No.2006CB202303)
文摘The Lukeqin structural belt is the main heavy oil accumulation zone in the Turpan-Hami Basin. The recent discovery of light oil in the Triassic indicates that there may be multiple source kitchens contributing to the oil accumulation. According to oil geochemical analysis and oil-source correlation, the oil in deep and shallow reservoirs of the Lukeqin Oilfield presents different physical and saturated hydrocarbon mass spectrum characteristics. The Triassic heavy oil is from the northern Upper Permian lacustrine source rocks, and the light oil represented by the Yudong-9 Well is from the northwestern Lower Jurassic coal-measure source rocks. The timing of oil charging was determined by K/Ar isotope dating, reservoir fluid inclusion analysis and the evolution history of different source rocks. In summary, the accumulation process consists of two stages. From the end of Triassic to early Jurassic, the northern Permian source kitchen generated a considerable amount of oil, which was finally degraded to heavy oil, migrated to the south and then accumulated. The northwestern Jurassic coal-measure source kitchen began to generate oil at the end of Cretaceous, while the northern source kitchen could only generate a little hydrocarbon. The heavy oil and the light oil have different source rock locations, migration directions and accumulation times. The migration of hydrocarbon source kitchens affects the distribution of heavy oil and light oil reservoirs at the present time.
基金supported by National Natural Science Foundation of China (No. 11075154)
文摘This paper presents a conceptual design for the first tentative surface muon source based on the proton beam provided by China Spallation Neutron Source （CSNS）. We have calcu- lated the optimal parameters of solid muon target, in which the method of Monte Carlo simula- tion is used to obtain the optimal muon beam parameters, such as beam fiuence rate, momentum spread and phase space distribution. A simple muon transport beamline system was also designed, which could transport the muons emitted from the muon target into the experimental area, where positrons from muon decay in a test sample are detected by a spectrometer. The beam optics of this new beam line is also described.
文摘Parameters of the power source used to control PV-10 piezoelectric crystal valve are following DC output voltage： 0 - 120 V, continuously controllable, linear enlargement factor of input direct current voltage： approximate 25 times, the accuracy of DC output voltage： ±5%, manual control and automatic control.
文摘Charge breeding technique is used for RIB （radioactive ion beam） production in order of optimizing the re-acceleration of the radioactive isotopes produced by a primary beam in a thick target. Charge breeding is achieved by means of a device capable of increasing the ion charge state from 1＋ to a desired value n＋. In some experiments, a continuous RIB of a given energy may be required. To reach this goal, a charge breeding device based on a hollow gun EBIS （electron beam ion source） has been proposed by the author recently. That EBIS, in principle, can be capable to realize a CW （continuous wave） operation. A sufficiently high focusing magnetic field could reduce to zero the hole radius in the EBIS electron beam. However, a smaller efficiency in the ion charge state increase should be expected. A code developed for studying the ion selective containment in a EBIS has been modified and used to simulate the ion charge state breeding. The effects of the hollow electron beam on the breeding rate have been studied.
基金supported by National Natural Science Foundation of China(No.61903291)Shaanxi Province Key R&D Program(No.2022GY-134)。
文摘A control strategy of repetitive control without inductorance decoupling was proposed to address the problem of high total harmonic distortion(THD)rate of the network-side current caused by the reduced stability of the rectifier module of the DC charging pile under weak grid as well as the dead zone and nonlinearity of switching devices during charging.Firstly,the parallel repetitive control was constructed in the inner current loop,and the proportional-integral(PI)+repetitive controller based on parallel structure was designed.For system compensation,a second-order low-pass filter was selected to correct the system,and the network-side current harmonics were actively suppressed without increasing the filtering device,which effectively improves the quality of grid-connected current.Secondly,based on the synthetic vector method,the controller parameters were designed to realize the elimination of main pole by establishing two synchronous rotation coordinate system vector differential equations,so as to realize the inductanceless decoupling to cope with the influence of network-side inductance fluctuation on the stability of the control system under weak grid.By theoretical analysis and simulation,the proposed control strategy was embedded into the self-developed digital signal processor for the rectifier module of DC charging pile,simulated dynamic and steady-state operation experiments were conducted,and comparative analysis was performed to prove the feasibility of the proposed control strategy.
文摘This paper proposes a design and control approach to parallel resonant converter(PRC) based battery chargers.The proposed approach is particularly suitable for the constant-current constant-voltage(CC-CV)charging method, which is the most commonly utilized one.Since the PRC is operated at two different frequencies for each CC and CV charging modes, this approach eliminates the need for complicated control techniques such as the frequency-control and phase-shift-control.The proposed method not only simplifies the design and implementation processes of the converter unit but also simplifies the design of output filter configuration and decreases the number of the required components for the control of the charger.The proposed method is confirmed by two experimental setups.The results show that the designed charger circuit ensured a very stable constant current in CC charging phase, where the charging current is fixed to 1.75 A.Although a voltage increase in CV phase is observed, the charger circuit is able to decrease the charging current to 0.5 A in CV phase, as depicted in battery data-sheet.The efficiency of the charger is figured out to be in the range of 86%-93% in the first setup, while it is found to be in the range of 78%-88% in the second setup,where a high frequency transformer is employed.
基金supported by the National Natural Science Foundation of China (No. 90914006)the Program for Changjiang Scholars and Innovative Research Team in the University (No. IRT0658)
文摘This paper discusses origin and charging histories of the Bozhong （渤中） 25-1 field （BZ25-1） in the Bozhong sub-basin, Bohai （渤海） Bay basin. Petroleum is contained in both Paleogene and Neogene reservoirs in the BZ25-1 field. The origin of the field was studied using biomarker distri-butions for 61 source rock samples and 34 oil samples. Oil in the Paleogene reservoirs was derived from the third member （Es3, 43.0-38.0 Ma in age） of the Eocene Shahejie （沙河街） Formation, whereas oil in the Neogene reservoirs was a mixtures of oil generated from the third member and the first member （Es1, 35.8-32.8 Ma） of the Eocene Shahejie Formation. Charging of the shallow Neogene reservoirs was dynamic, probably ongoing, which was a combined result of the existence of active source rocks, the development of overpressure and the fault reactivation since about 5.1 Ma. On the contrary, the deep Paleogene reservoirs experienced intensive oil leakage as indicated by the high GOI （grains-containing-oil-inclusions） values （up to 30%） for samples below the present-day oil-water con-tact. Part of the oil that leaked from the Paleogene reservoirs re-accumulated in the shallow Neogene reservoirs. The variation of oil origins within the BZ25-1 field, and the dynamic petroleum charging into the shallow Neogene reservoirs and leakage from the deep Paleogene reservoirs have important implications for petroleum exploration.
基金Supported by the U.S.Department of Energy,Office of Nuclear Physics,under contract W-31-109-ENG-38
文摘A new radioactive beam facility for ATLAS,the Californium Rare Ion Breeder Upgrade (CARIBU), is under construction.The facility will use fission fragments from a 1 Ci ^(252)Cf source;thermalized and collected into a low-energy beam by a helium gas catcher.In order to reaccelerate these beams,the existing ATLAS ECR-I ion source is being redesigned to function as a charge breeder source.The design and features of this charge breeder configuration is discussed and the project status described.
基金Project supported by the National Major Science and Technology Project"Key Technologies for Seismic and Wellbore Fine Exploration"(No.2016ZX05006-002)the RIPED Scientific Reseach and Technology Development Project"Real-time Carbon Isotope Detection and Gas-bearing Model"(No.2018ycq01).
文摘Minfeng sub-sag in the Bohai Bay Basin was taken as an example.The Wells Yanxie 233,Yongxie 932 and Yan 22 were selected for on-site carbon isotope detection.Then,based on sufficient carbon isotope datawhich were acquired on the drilling site using the brand-new carbon isotopic measuring instrument,the carbon i sotope dataand composition data of natural gas produced in this areawerecompared.Andcombined with the evolution of source rocks,the geochemical characteristics of crude oil,the depositional environment of reservoirs and the physical properties,single-well charging characteristics and regional charging area ofnatural gas wereanalyzed.Finally,the feasibility of on-sitecarbon isotope detection method to discriminate hydrocarbon charging was discussed.And the following research results were obtained.First,deep hy drocarbon charging happened in thePurely Purely Lower Sha 4 Member in Well Yanxie 233,and its natural gas is the mixture of the oil cracking gas of deep layers and the thernal cracking gas of autochthonous source rocks.Second,the natural gas in the third and fourth Members ofShahejieFormation in Well Yongxie 932 is the thermale racking gas of autochthonous source rocks,but deep gas charging occurred in particularhole sections.Third,the carbon isotope of associated gas in Well block Yan 22 is high in the central area and low in both sides and high in the south and low in the north,which is accordant with the distributi on characteristics ofreservoir physicalproperties,indicating thatthe charging ofhigh-maturity natural gas is under the control of reservoir physical properties.Fourth,the oil in Well block Yan 22 is the product of autochthonous source rocks in the mature stage while the natural gas is the autochthonous oil-associated gas combined with the charging of deep high-maturity product.It is concluded that there is a high-maturity hydrocarbon charging area in the northwest of the northern slope of the Minfeng sub-sag,and it is a favorable hydrocarbon exploration target.What's more,the on-site carbon isotope rapid detection technology can provide a large number of continuous three-dimensional carbon isotope data,and it can be used to quickly analyze the characteristics of Studying hydrocarbon charging isquite important for searchingexploration targets and confirming well locations.In thispaper,the north slope of the hydrocarbon charging and determine the source and ori gin of hydrocarbon,so as to provide reference for hydrocarbon development deployment.
文摘针对可再生能源、电解槽和储能设备集成的孤岛直流微电网制氢系统,提出了1种考虑储能荷电状态(state of charge,SoC)的优化控制策略.首先,对碱性电解槽的制氢效率特性进行分析,提出了1种制氢效率随母线电压变化而自适应调整的优化控制方法,通过与储能系统协调互补,将制氢效率保持在较高的范围内.当储能SoC越过上下限时,设计了1种不依赖通信的SoC主动恢复控制策略,确保储能系统的安全运行.其次,设计了1种考虑极端工况下的功率协调控制策略,通过各个运行模式之间的灵活切换来保证直流微电网的稳定运行.最后,通过MATLAB/Simulink仿真平台对所提控制策略的有效性进行了验证.
