Variable frequency power source is the standard value of variable frequency power quantity (or value transfer) system is the core component, the voltage and current signals an output variable frequency generator. The device can independently adjust the amplitude of voltage and current and the phase difference of the two. The device also includes an accurate measurement of voltage, current, frequency and voltage and current synthesis of virtual power standard table, showing the value as a comparison reference standard table, to achieve a variety of measuring device / variable frequency power as the main object of measurement traceability system. As a kind of metrological standard device for measurement traceability, the metrological characteristics must meet the requirements of the relevant measurement regulations.
1Importance of calibration and verification of variable frequency power measuring instruments/systems
Electric energy is the main energy industry in our country, using frequency conversion technology is an important way to improve the operating efficiency of electrical equipment, and the correct evaluation of frequency energy efficiency evaluation system is essential for improving mining energy saving potential and part of electric energy efficiency. Therefore, the frequency of test equipment for traceability of scientific and authoritative and accurate content, determines the correctness and validity of energy efficiency evaluation system of variable frequency operation, the energy efficiency evaluation is based, and provides technical support for the realization of social key energy-saving emission reduction targets.
2The present situation of the system of variable frequency electric quantity measuring instrument/system
In the process of application, the frequency of the power supply is often characterized by nonstandard sine wave, low fundamental frequency, low power factor and high harmonic. At present, it is widely used in domestic and foreign Fluke 6100 as the standard power source for the calibration of variable frequency power measuring instruments. But with the rapid development of the high power converter / inverter, new energy power generation equipment, wind turbines and other heavy equipment manufacturing industry, the above way because the source output capability limit has been far from meeting the frequency current testing equipment / system in the full range of values for traceability. No inspection at high voltage and high current, high power frequency test system, unable to carry out the work of frequency measurement pattern evaluation, quality supervision and test equipment to conduct frequency conversion. The lack of traceability system not only affects the legal management of energy metering equipment, but also seriously restricts the healthy development of the frequency conversion measurement sensor and instrument industry.
OneOverview of ATITAN frequency conversion power standard source
ATITAN frequency conversion power source is the YINHE ELECTRIC Co. Ltd. joint National University of Defense Technology, Hunan Province Institute of measurement and testing, for many years engaged in scientific research and practice to explore the characteristics, application and measurement of variable frequency power as the main research object in the fusion theory of measurement and control of the world's most advanced, conform to the current social demand imminent the core value of a traceability system, variable frequency power to the forefront of technology and technology developed device.
ATITAN frequency power standard source won 2 national invention patents, utility model patents, design patents of 2, and passed the national scientific and technological achievements appraisal of the. National variable frequency electric power metering and measuring instrument measuring station is approved by the State Administration of quality supervision and inspection, and the product verification and manufacturing standards will be incorporated into the provincial standard and national standard system.
The birth of a number of technological breakthroughs and ATITAN oscillation frequency conversion power source so that the standard in our country to establish a complete set of variable frequency power become a reality traceability system, epoch-making milepost type, great historical significance in the field of electromagnetic measurement.
ATITAN frequency conversion power source can fully cover the standard 0 - 10kV, 0 - 1000A, 5 - 400Hz, the phase angle of 0---359.99 degrees in the range of frequency and frequency measurement instrument / system calibration and verification requirements, the accuracy is 0.05%.
1The principle of ATITAN frequency conversion power standard source
Figure 1、The principle of ATITAN frequency conversion power standard source
2Application of ATITAN series frequency conversion power standard source
ATITAN variable frequency power source is mainly used for standard traceability of variable frequency power, chart 2 is the amount of power frequency and WP4000 frequency conversion power analyzer and DT digital converter traceability system diagram, can be used for variable frequency electrical measuring instrument, variable frequency power transmitter and frequency testing system traceability:
◆ The quantity traceability system of variable frequency electric quantity measuring instrument
Variable frequency power measuring instruments (including the power frequency measurement instrument) mainly refers to: digital voltage meter, digital current meter, power meter, such as power analyzer, power meter, harmonic analyzer, etc..
◆ The quantity traceability system of variable frequency power transmitter
Variable frequency power transmitter (covering power transmitter) mainly refers to a variety of voltage and current sensors and transmitters, including digital output and analog output power of the transmitter frequency conversion power transducer, such as: AnyWay SP series inverter power sensor, pressure sensor, Holzer Holzer electric current sensor, electromagnetic voltage transformer, electromagnetic current transformer, capacitor voltage transformer, voltage divider, shunt, Rogowski coil etc..
◆ Quantity traceability system of variable frequency electric quantity testing system
The variable frequency power measurement system (including the power frequency test system) mainly refers to the system composed of a variable frequency power transmitter and a variable frequency power measuring instrument.
Figure 2、Inverter power quantity value traceability system composed of ATITAN frequency conversion power standard source
3Operation requirements of ATITAN series frequency conversion power standard source
|Working power||Working temperature||Recommended operating temperature range||Preheating time||The maximum relative humidity of safety work (non condensing)||When storing the maximum relative humidity (non condensing)||Working altitude|
ThreeTITAN frequency conversion power standard source characteristics
1Excellent voltage and current output capability and quality
ATITAN series inverter power source adopts the standard design concept in digital electronic technology as the leading, breakthrough the output ability of traditional standard source, which can provide up to 10kV and 1000A voltage and current output, the accuracy is 0.05%, and the phase between voltage and current amplitude, frequency and angle are both independent adjustable. The inverter power quantity traceability system can realize the direct measurement of the high voltage and large current variable frequency transmitter / sensor.
In addition to sine wave voltage and current, it can also provide accurate, harmonic distortion of the voltage output and current output. All the first 100 harmonics can be set by the user, and the amplitude and phase of each harmonic can be controlled separately by the user. Comparison of output power ratio between ATITAN series frequency conversion power standard and similar products:
|Output capability||Voltage||Electric current||Frequency|
2Thoughtful and safe protective measures
Thoughtful and safe protective measures
◆ Verification / calibration process in the ATITAN frequency conversion power standard source output high voltage signal, the product by the following way to ensure your safe operation: ATITAN inverter power standard housing needs strict grounding, near the high-voltage output terminal with conspicuous warning signs;
◆ The source and meter were separation, including the frequency power sensor fixed together with the signal source and the measuring signal generate high voltage and high current, meter for the operation end receives the digital signal from the frequency conversion power sensor and control board through the optical fiber, there is no electrical connection between the source and end of operation.
3Excellent voltage and current drive capability
ATITAN series frequency conversion power standard source can ensure that the output voltage and current will be given under heavy load. The output capacity of the voltage channel is up to 500VA, and the output capacity of the current channel is up to 3000VA. Can achieve the needs of various types of electric sensor / transmitter or meter traceability.
4Traceability to support single phase to multiphase systems
ATITAN series inverter power source for standard single-phase system, when the calibration channel your needs change, can use multiple ATITAN series inverter power source to increase output by standard phase synchronous master-slave control mode, can be expanded to six. The basic technical indexes will not change because of the increase of the number of output phase. It is the ideal choice to build the system of the multi - phase variable frequency power measuring instrument.
5User friendly graphical interface
ATITAN series inverter power source standard system control program based on Windows operating system, friendly man-machine interface, you can use the buttons on the instrument operation, can also use external keyboard and mouse operation.
6Excellent electromagnetic compatibility
ATITAN series inverter power source standard always implement the EMC concept, with excellent shielding and grounding technology, reasonable measures, based on the filtering effects of optical fiber transmission of digital closed-loop control to eliminate the external interference, to provide a reliable guarantee of output stability and EMC performance for the entire standard source.
ugust 12, 2012, the Hunan Provincial Institute of Metrology and testing, YINHE ELECTRIC Co., Ltd. and the national defense science and Technology University jointly assume the frequency conversion power standard source of scientific and technological achievements was held in Changsha. Vice governor Li Youzhi, the State General Administration of quality supervision, inspection and quarantine chief engineer Liu Zhuohui, China Academy of Engineering Zhang Zhonghua and other leaders and experts, established a "frequency measurement standard", build "national power frequency measuring instrument measuring station" work and listen to the report.
Science and technology achievements appraisal meeting in the morning, academician Zhang Zhonghua informed the results of identification results:
Variable frequency power measurement technology of the project is a hot topic of international metrology, technical difficulty; to solve the bottleneck problem in China's energy saving and emission reduction in areas such as variable frequency power measurement technology; the development of high voltage and large current power frequency standard source, to fill the gaps at home and abroad, the overall technology reached the international advanced level, which the range and frequency range and other technical indicators in the international leading level.
The afternoon of reporting the results of the meeting, the National Quality Inspection Bureau, the provincial government made clear support in the organization, projects, funds and policies, actively support the project to the direction of industrialization, play a huge role in this achievement as soon as possible.
A case study of AT103501-W frequency conversion power standard source:
AT is ATITAN series power standard source identifier. 103 and 501 respectively, the maximum output voltage and current standard, with reference to scientific notation, using 10 times N forms, including digital top two as the base, third digit index. 103 means that the maximum output voltage is 10kV, and the maximum output current is 501 500A.
TwoATITAN series inverter power standard source model list
ATITAN series frequency conversion power source is divided into two categories: power frequency and frequency conversion. Power frequency series output frequency range 40 ~ 65Hz, frequency conversion series output frequency range from 5 to 400Hz.
|Model||Voltage range (V)||Current range (A)||Frequency range (Hz)||Accuracy|
OneGeneral technical index
|Voltage / current setting resolution||Output fundamental range||Frequency accuracy||Frequency setting resolution||Preheat time required to achieve nominal accuracy|
|5||5Hz ~400Hz||10ppm||0.01Hz||An hour|
|The phase angle setting range||Angle accuracy||Set the resolution phase||Maximum number of voltage harmonics|
|0°~359.99°||0.02°||0.01°||100 Subharmonic||100 Subharmonic|
TwoVoltage channel technical index
|Output range||Output capacity||Accuracy||The stability of||Waveform distortion|
|100V ~10kV||500VA||0.05 level||0.02%（1 hours）||less than0.5%|
ThreeCurrent channel index
|Output range||Output capacity||Accuracy||The stability of||Waveform distortion|
|5A ~1000A||3000VA||0.05 level||0.02%（1 hours ）||小于0.5%|
ThreeSynthetic power technical index
|500VA ~10MVA||0.1 level （power factor＞0.8）|
|Product related applications ：|