电气设计外文翻译.docx

英文原文Quality Control Testing Of New Technologies To Analyse EnergyElectric quality control testing of new technology analysis summary : With advances in technology, modern power system electricity load structure has undergone major changes, such as the semiconductor rectifier, transistor rubber and frequency conversion adjustment devices, steel-making furnaces, electric railways and household appliances such as load rapid development, because of its nonlinear, and the uneven impact of the electricity identity the grid voltage waveform distortions occur as a flash change and the three-phase voltage fluctuations and imbalances, or even cause system frequency fluctuations, the quality of electricity supply to cause serious interference or pollution . In the face of increasing electricity grid CKS quality issues, which makes electric quality research is extremely pressing. Electric quality testing is the most direct access to relevant data conversion means, but also the quality of other follow-up High energy applied research front.Keyword : electric quality testing neural network1 electric quality research, the application of new technologies backgroundWith advances in technology, modern power system electricity load structure has undergone major changes, such as the semiconductor rectifier, transistor rubber and frequency conversion adjustment devices, steel-making furnaces, and household appliances, such as railway electrification load rapid development, because of its nonlinear, and the uneven impact of the electricity identity the grid voltage waveform distortions occur as a flash change and the three-phase voltage fluctuations and imbalances, or even cause system frequency fluctuations, the quality of electricity supply to cause serious interference or pollution . In the face of increasing electricity grid CKS quality issues, which makes electric quality research is extremely pressing.On the other hand, the quality of electricity supply is gradually enterprises and electricity consumers are of common concern. Since the 1990s into the 20th century, as the semiconductor, computer technology is developing rapidly, the number of high-tech enterprises have emerged, a large number of computer control devices and production lines. Quality of electricity put new demands; And the development of the electricity market to greater awareness of the power supply enterprises : users need is their own needs. Against this background, the result of poor quality due to electricity users of defective equipment or parking situation. Quality standards should be seen as electricity. Of course, there are many bad quality of electricity users to transfer quality sensitivity also varied. One boat, the electric power supply enterprises of different quality may be a hierarchy, respectively pricing, users can freely choose. But also because of our failure to achieve quality grain at the present. Therefore, further work is required to improve the quality of electricity users in the adjacent settlement. With the quality of electricity equipment sensitivity to changes in electricity, further expand the scope of quality electricity. demanding more detailed classification. In the new electricity market environment, the quality of electrical energy has become a power consumption characteristics of such commodities, largely reflects the quality of electricity service. Therefore, relevant departments are increasing the quality of electrical energy regulation and governance.These background, the quality of electrical energy research urgent need to promote new technologies through the application of these new technologies so that the quality of electrical energy from the testing, analysis and monitoring aspects have been improved, thus enabling discovery and rules, and improve the quality and supply of services.2.power quality testing new technologiesElectric quality testing is the most direct access to relevant data conversion means, but also the quality of other follow-up High energy applied research front.2.1 quality testing of electric currentTo monitor the quality of electrical energy to electrical energy is the quality of information of direct channels, while the instrumentation has many, but most only continuity and stability testing indicators, and traditional theories based on valid value testing technology because of the time window is too long, only valid value can not measure accurately describe the actual electricity quality, Thus the need to develop new detection technologies to meet the following requirements : First, to capture rapid (ms level even ns level) instantaneous interference waveform. It is difficult because many disturbances in an individual parameter (such as valid value) to complete description, and random nature of the strong, and therefore the need for multiple tests to initiate volume and devices, such as the worth and waveform distortions, worth rising rates. Second, the need to measure the worth of harmonics and inter-harmonics, phase, the need for adequate high sampling rate, so that they can detect the high harmonics information. Third, the establishment of an effective analysis and automatic identification systems to enable them to reflect the characteristics and electric quality indicators over time changes. With the electricity market and electricity quality of legislation, the quality of power supply will cause increasingly wide attention developed into electrical energy quality monitoring distribution of the new SCADA system is energy management system new directions of research. This area will be difficult for current and voltage measurements at the same time continuing to identify the classification of quality indicators and statistics, large amounts of data, hence the need to develop a strong database for effective management.2.2 New technology applicationsAt present, electric quality in hardware and software, digital signal processing applied mainly (DSP), and new technologies such as virtual machines Xiaobo change as new algorithms. introduced to the basic concepts of the energy and quality measurement, and given the number of measurements for change detection analysis methods and flash simulation waveform. DSP devices discussed in compensation by the power quality testing applications, the device used to highlight the achievement of physical hardware and software to control the actual development. quality testing for the electric system under the real-time nature of complex algorithms and support the special request CPU based on the plug-in a real-time system solutions. Focused on the hardware system design and equipment based on CPU system software design ideas. After debugging, and operation of the actual design, circuit normal function, demonstrated the reasonableness of the design and usability. Compared to the previous design, the real-time nature of the good, small size and low cost advantages. based on a strange sexual Xiaobo change signal detection theory and in the quality Zantai electric signal detection of a detailed study applications through based on the standard deviation estimated Xiaobo wave passed algorithms, the effective exclusion of noise interference and the failure to achieve the precise moment positioning. under Xiaobo change theory, data quality testing in conjunction with electrical characteristics, and will be based on their coefficient Xiaobo threshold power quality testing methods for data compression. Simulation calculations and analysis indicates that the approach is simple and better compression results to retain local identity compressed signals, the calculation speed, Very suitable for real-time demands strong occasions. quality testing of electrical components and operating principles of the system conducted a detailed briefing. Energy Quality Assessment System software applications MATLAB and C+ mixed programming language technologies. The system not only to achieve precise sampling data grid, the electricity grid can also analyse quality indicators, and visual graphics to show. 10 introduced virtual machines electric quality testing and analysis system formed on LabVIEW software to achieve frequency tracking technology, and introduced the use of electric network quality long-range detection and data analysis methods, and finally give some of the procedures.3 qualitative analysis of the new energy technologyElectric quality analysis of the various sources of interference and calculate the mathematical description of the electricity system, and to develop corresponding software and engineering approach to the analysis of electrical systems for the analysis of quality problems, providing guidance to improve the quality of electricity. The sources of interference are different in nature, interference spectrum GHz from 0Hz to the broad context of grid components in different interference of a different role in the performance, interference sources and the establishment of grid components (or partial grid) accurate mathematical models are sometimes difficult to calculate and analyse the accuracy depends not only on mathematical models and calculation also depends on the credibility of the information grid basis. In recent years, various analytical methods based on digital technology in the energy field quality application :First analysis of the distribution network in harmonics Second, the analysis arising from the various sources of disturbances and waveform distortions in the network transmission. Third, analysis of quality control devices in addressing energy issues related to the role; Forth，more coordination and control devices and other controls integrated control and other issues.There are three methods currently used :(1) 24-hour simulation methods qualitative analysis of the ways in which electricity most widely used, its main purpose is to use the power of 24-hour simulation procedures to the various quality studies Zantai phenomenon. 24-hour simulation is relatively common procedure mainly EMW, EMTEC, NETOMAC, BPA systems Zantai procedures and spice simulation, PSPICE, MATLAB, Saber, power electronic simulation procedures in two broad categories. These simulation procedures in constant development, its function has become increasingly strong, and can also use their electrical equipment, components of the power system harmonics analysis and modelling.(2) frequency domain analysis of the methodology of the analysis of the major issues for the harmonics, including frequency scanning, harmonics trend calculation. Taking into account the number of nonlinear dynamic load characteristics, and in recent years has also filed a mixed trend resolved calculation that, in conventional harmonics trend calculation basis, using EMTP, 24-hour simulation of nonlinear load procedures for simulating the calculation may derive the dynamics of the harmonics lost volume, thus resolved by dynamic trend Xie.(3) Based on the method used here mainly referring to Fourier transformation methods, short Fourier transformation methods and change Xiaobo (wavelet). As a classical signal analysis methods are orthogonal Fourier transformation, the complete, and many other advantages, but also such as FFT fast Fourier algorithms, and therefore the quality of analysis in the field of energy widely applied. But in the Portuguese use, the following conditions must be met : First, to meet the requirements of sampling theorem, sampling frequency must be more than twice the highest frequency signal; Second, the analysis of the waveform to be produced, the cycle of change over time. Therefore; When the sampling frequency or signal does not meet the above conditions, using FFT analysis would bring the error analysis. In addition, the FFT transformation of the whole time of scoring, time information to be underutilized; Any mutations signals, the spectrum will be scattered throughout the necktie. To resolve these issues, using the window Gabor made fast Fourier transformation method is not a steady process as a series of short between the assembly process will not be smooth for the Fourier transformation signal analysis. As the actual process of multi-criteria analysis requirements-friendly window from the adaptability of the HF frequency window, large, small, window; Low frequency, the frequency of small windows, large windows, and StFt time-frequency window is fixed. Therefore, it is appropriate to the scale analysis of the same process, not suitable for multi-scale analysis of the process and mutation process. But this method is not separated form orthogonal started elusive efficient algorithms. Xiaobo has changed since the time-frequency localized characteristics and StFt etc. overcome these shortcomings, and are particularly suited to mutations signal and not a signal analysis. Xiaobo changing as a new digital technology was the introduction of engineering, has been in image processing, data compression and signal analysis, and other areas to be widely applied. As soon fade Xiaobo function itself, but also a kind of Zantai waveform will be used in the field of electricity qualitative analysis, particularly Zantai areas will be FFT analysis process, the StFt incomparable advantages. Recently, the literature on the application of existing methods of energy conversion Xiaobo quality assessment, electromagnetic Zantai waveform analysis and modelling of electric power system disturbances quality research.4 electric quality of the artificial intelligence research of new technologiesIn recent years, an expert system, neural networks, fuzzy logic and artificial intelligence representative of the evolution of new technologies for more comprehensive application of energy has begun to qualitative research because it is a more complex workload and the large volume of data processing systems. Particularly in the electricity qualitative analysis, many artificial intelligence applications to support analysis of complex issues. And a prominent feature of these new technologies is very broad cross-application, sometimes it is difficult to say what kind of technology, but mainly to some other squads. Said it usually mixed technologies.4.1 expert systemdespite the higher costs and expert systems in the development process take too long, but there is still a lot of applications 11-22. These primarily reflected in the voltage and waveform distortions in the classification; Expert analysis using harmonics; Quality solutions to the energy in the framework of expert systems development; Measurement and analysis of electric power systems and the quality of electromagnetic compatibility; Identification of a power quality event can be expanded through the system; Energy management quality data quality of professional training electricity advisory personnel.4.2 neural networkArtificial neural networks as a more mature intelligence technology, the quality of electrical energy has been in the wider applications, they mainly contains 23-37 : from the quality of information, identification of non-electric energy quality events; To have resolved the model modelling; In the grid, estimates and the evaluation resolved distortions and other electrical quality; Xiaobo neural network integration to distinguish and identify energy conversion quality incidents; in the need to avoid noise and harmonics son of harmonics analysis; Electricity engineers for the development of a quality problem solving energy aids;4.3 fuzzy logicFuzzy logic and neural network learning with the fuzzy logic is the most popular artificial intelligence technology. In the quality of their energy has also made many new research progress : diagnostic quality of electricity; Electric utility to provide the quality of staff supporting tools; Data quality and data management power excavation to acquire relevant knowledge; development of the electricity sector and users of energy quality professional training system; to raise the quality of electric interference classification; adaptive collection of energy side has roots voltage and current; Research at the appropriate time to contact condenser for the vote is resolved to control the level of distortions; in a vague assessment by the establishment of quality indicators used electric control programmes based on fuzzy logic to develop a unified electricity quality management device; forecasting and the identification of the non-functioning system; To ensure the quality of power supply voltage based on fuzzy logic implementation without merit compensation.5 electric quality control, new technologiesIn the quality control of electrical energy, I think there are two trends : One is the section mentioned intelligent, intelligent aimed at alleviating human labor, the quality of electrical energy to the issue of automatic identification and data processing, thereby achieving a comprehensive unmanned surveillance functions.Another is long-range. With the development of the power industry and grid-scale expansion of the electricity sector and users of the urgent need for more extensive monitoring points to monitor, but the point spread, distance different monitor quality issues on the basis of electricity users and network needs are different. So long-range can be adapted to different levels of control, so that quality control points to the distribution of electricity to the grid anywhere, and have good online functions.But the inevitable result of the long-range problem is to monitor and control station point communications between data quality and large electric transmission issues are very important. 50 power line carrier-based to achieve a more simple RMON. Computer network technology, the quality of electric power supply system for different locations on the long-range monitoring and analysis provided effective means. discussed energy supply system based on the qua