THD(Take Hot Drilling)是一种创新的专利技术,意为钻井取热,该专利是一种在地热开采中有效提高产水量及保持温度的多通道系统,该多通道系统有效地增加了产水量,其核心思想是将不符合温度要求的多个含水层的水资源充分利用。这一技术通...THD(Take Hot Drilling)是一种创新的专利技术,意为钻井取热,该专利是一种在地热开采中有效提高产水量及保持温度的多通道系统,该多通道系统有效地增加了产水量,其核心思想是将不符合温度要求的多个含水层的水资源充分利用。这一技术通过引导这些水资源至井底,然后借助井壁进行加热升温,并与地下高温热水混合,最终通过出水通道将其抽出,该出水通道具备隔热保温的功能,有效减少地热水向地面输送的沿程温度损失,从而实现了保持温度和提升的双重目标。首次在某地热井中应用THD专利技术证实了该系统在提高地热开采效率方面的可靠性和有效性。此外,在出水通道方面仍存在改进和优化的潜力,有待进一步深度研究与分析探讨。总的来说,THD专利技术为地热(温泉)井开采提供了一项重要的技术保障手段,值得进一步验证和广泛推广应用。展开更多
Any nonlinear behavior of the system is analyzed by a useful way of Total Harmonic Distortion(THD)technique.Reduced THD achieves lower peak current,higher efficiency and longer equipment life span.Simulated annealing(S...Any nonlinear behavior of the system is analyzed by a useful way of Total Harmonic Distortion(THD)technique.Reduced THD achieves lower peak current,higher efficiency and longer equipment life span.Simulated annealing(SA)is applied due to the effectiveness of locating solutions that are close to ideal and to challenge large-scale combinatorial optimization for Permanent Magnet Synchronous Machine(PMSM).The parameters of direct torque controllers(DTC)for the drive are automatically adjusted by the optimization algorithm.Advantages of the PI-Fuzzy-SA algorithm are retained when used together.It also improves the rate of system convergence.Speed response improvement and har-monic reduction is achieved with SA-based DTC for PMSM.This mechanism is known to be faster than other algorithms.Also,it is observed that as compared to other algorithms,the projected algorithm yields a reduced total harmonic distor-tion.As a result of the employment of Space Vector Modulation(SVM)techni-que,the system is resistant to changes in motor specifications and load torque.Through MATLAB&Simulink simulation,the experiment is done and the per-formance is calculated for the controller.展开更多
In an industrial facility,many electrical consumers can affect the quality of electricity.Therefore,the freedom from interference sources of these devices and equipment can be crucial for quality and uninterrupted ele...In an industrial facility,many electrical consumers can affect the quality of electricity.Therefore,the freedom from interference sources of these devices and equipment can be crucial for quality and uninterrupted electricity supply.Electric welding equipment is also a possible source of interference.The electrical harmonic injections created by welding equipment into the electrical network can affect the operation of other consumers connected to the given distribution points and cause unjustified overheating and shutdowns of some network components.The aim of the research is to analyse the current harmonic injection of welding equipment of different types and modes of operation connected to the internal distribution network of the industrial facility.The effectiveness of the active harmonic filter built into the welding equipment was also examined in the paper.The results showed that the built-in active harmonic filter of the DC045 laser welding equipment was ineffective because the total harmonic distortion(THD)was about three times the 8%allowed by IEEE 519−2022 standard.The current harmonic injection of MIG 320 and MM403 type welding equipment was more than five times the permissible value of 5%.The current harmonic distortion of the PLAS140 type plasma-jet cutter equipment was below the 5% value allowed in the standard,thus it complied with it.Based on the measurement results,it can be concluded that the use of protection against harmonics is also necessary for welding equipment.Finally,proposals were made in the paper to reduce the effect of harmonics.展开更多
文摘THD(Take Hot Drilling)是一种创新的专利技术,意为钻井取热,该专利是一种在地热开采中有效提高产水量及保持温度的多通道系统,该多通道系统有效地增加了产水量,其核心思想是将不符合温度要求的多个含水层的水资源充分利用。这一技术通过引导这些水资源至井底,然后借助井壁进行加热升温,并与地下高温热水混合,最终通过出水通道将其抽出,该出水通道具备隔热保温的功能,有效减少地热水向地面输送的沿程温度损失,从而实现了保持温度和提升的双重目标。首次在某地热井中应用THD专利技术证实了该系统在提高地热开采效率方面的可靠性和有效性。此外,在出水通道方面仍存在改进和优化的潜力,有待进一步深度研究与分析探讨。总的来说,THD专利技术为地热(温泉)井开采提供了一项重要的技术保障手段,值得进一步验证和广泛推广应用。
文摘Any nonlinear behavior of the system is analyzed by a useful way of Total Harmonic Distortion(THD)technique.Reduced THD achieves lower peak current,higher efficiency and longer equipment life span.Simulated annealing(SA)is applied due to the effectiveness of locating solutions that are close to ideal and to challenge large-scale combinatorial optimization for Permanent Magnet Synchronous Machine(PMSM).The parameters of direct torque controllers(DTC)for the drive are automatically adjusted by the optimization algorithm.Advantages of the PI-Fuzzy-SA algorithm are retained when used together.It also improves the rate of system convergence.Speed response improvement and har-monic reduction is achieved with SA-based DTC for PMSM.This mechanism is known to be faster than other algorithms.Also,it is observed that as compared to other algorithms,the projected algorithm yields a reduced total harmonic distor-tion.As a result of the employment of Space Vector Modulation(SVM)techni-que,the system is resistant to changes in motor specifications and load torque.Through MATLAB&Simulink simulation,the experiment is done and the per-formance is calculated for the controller.
文摘In an industrial facility,many electrical consumers can affect the quality of electricity.Therefore,the freedom from interference sources of these devices and equipment can be crucial for quality and uninterrupted electricity supply.Electric welding equipment is also a possible source of interference.The electrical harmonic injections created by welding equipment into the electrical network can affect the operation of other consumers connected to the given distribution points and cause unjustified overheating and shutdowns of some network components.The aim of the research is to analyse the current harmonic injection of welding equipment of different types and modes of operation connected to the internal distribution network of the industrial facility.The effectiveness of the active harmonic filter built into the welding equipment was also examined in the paper.The results showed that the built-in active harmonic filter of the DC045 laser welding equipment was ineffective because the total harmonic distortion(THD)was about three times the 8%allowed by IEEE 519−2022 standard.The current harmonic injection of MIG 320 and MM403 type welding equipment was more than five times the permissible value of 5%.The current harmonic distortion of the PLAS140 type plasma-jet cutter equipment was below the 5% value allowed in the standard,thus it complied with it.Based on the measurement results,it can be concluded that the use of protection against harmonics is also necessary for welding equipment.Finally,proposals were made in the paper to reduce the effect of harmonics.
