Power Quality, in a general sense, refers to quality power, including voltage quality, current quality, power quality, and power quality.
LCT-FB602 portable power quality analysis, the analyzer uses a management background (currently popular portable tablet or laptop) + acquisition front-end mode (similar to Fluke 1760 mode). The front end of the acquisition front adopts the high-speed DSP digital processor's black box design, which does not require too much operation and complicated display. Therefore, the operation speed is fast, the reliability is good, the anti-interference is strong, the wiring does not need to be disassembled, and the operation is convenient and quick.
The management background can use the open source android operating system tablet for measurement and data management, and the operation is more convenient; or configure the notebook computer with wifi module, use the WINDOWS-based platform to directly perform measurement and data management, complete data statistics and analysis. And printing and other operations. The high-performance wifi wireless high-speed connection between the front-end and the back-end (tablet or laptop) enables long-distance observation and control, and is safe and free, reflecting the people-oriented design concept.
It can be defined as: the deviation of voltage, current or frequency that causes the malfunction of the electrical equipment or does not work properly, including frequency deviation, voltage deviation, voltage fluctuation and flicker, three-phase unbalance, temporary or transient over-voltage, Waveform distortion (harmonics), voltage dips, interruptions, transients, and continuity of power supply. In modern power systems, voltage sag and interruption have become the most important power quality issues.
The power quality analyzer is a special portable product for detecting and analyzing the quality of power grid operation. It can provide harmonic analysis and power quality analysis in power operation, and can perform long-term data acquisition and monitoring on grid operation. At the same time, it is equipped with power quality data analysis software to perform various analysis on the measurement data uploaded to the computer.
In the general sense of LinkedIn, power quality refers to quality power supply. However, because people look at the different angles of the problem, so far, there is still a different understanding of the technical meaning of power quality, and can not give an accurate and unified definition.
For a long time, the concept of power quality and the reliability of power supply are almost identical. How to describe the interaction and influence of power supply and power consumption, and give the corresponding technical definition is still a problem that people are constantly exploring. Regardless of the definition of power quality, the connotation of power quality should include the following aspects, and a common consensus has been reached to solve power quality test equipment.
Voltage quality: gives the deviation between the actual voltage and the ideal voltage to reflect whether the power allocated by the power supply department to the user is qualified. Voltage quality usually includes voltage deviation, voltage frequency deviation, voltage imbalance, electromagnetic transient phenomenon, voltage fluctuation and flicker, short-time voltage variation, voltage harmonic, voltage-to-voltage harmonic, voltage gap, undervoltage, overvoltage, and so on.
Current quality: Current quality is closely related to voltage quality. In order to improve the transmission efficiency of electric energy, in addition to requiring the user to draw a current of a single frequency sine wave, the current waveform should be kept as high as the supply voltage. Current quality usually includes current harmonics, interharmonics, current phase lead and lag, noise, and so on. Studying current quality can help improve the power quality of the grid and reduce line losses, but it cannot summarize most of the quality problems caused by voltage, which is often not always caused by electricity.
Three-phase power quality analyzer FLUKE434
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Power Quality Analyzer 6310
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Topas2000 Power Quality Analyzer
Power Quality Analyzer 6830+6801 (100A)
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Three-phase power analyzer TES-3600
Power Quality Analyzer Fluke430 Series
Three-phase power quality recorder Fluke1760
Power quality: It includes two parts: technical meaning and non-technical meaning. The technical meaning is voltage quality and power supply reliability; the non-technical meaning refers to the quality of service, including the speed of response of the technical power supply department to user complaints and complaints, and the transparency of power price objectives.
Quality of electricity: The quality of electricity reflects the responsibility and obligation of the interaction and influence of both parties. It includes technical and non-technical implications. Technical implications include the impact and requirements of power system power quality specifications. Non-technical meaning refers to the quality of performance of electricity liability and obligation, such as whether the user pays the electricity fee on time and in full.
At present, although there is a consensus on the terminology and its connotation of using power quality at home and abroad, the exact definition of power quality has not yet formed a unified consensus. A few of the more widely used definitions are as follows:
(1) The concept of qualified power quality means that the grounding system that supplies power to the sensitive equipment and the settings is suitable for the normal operation of the equipment. This definition comes from the technical definition of power quality given by the IEEE Standardization Coordination Committee.
(2) Power quality refers to the physical characteristics of the power supply device that does not interrupt or interfere with the user's use of power under normal operating conditions. This definition comes from the IEC (1000-2-2/4) standard. According to this definition, in addition to the sinusoidal waveform at rated voltage and rated power, modern power quality also includes frequency deviation, voltage deviation, voltage fluctuation and flicker, three-phase balance, waveform distortion, and all voltage transients, such as Shock pulse, voltage drop, momentary interruption and power supply continuity. This definition includes the causes and consequences of power quality problems, as well as the issue of reliable power supply.
(3) Power quality definition refers to the characteristics of voltage at a specified point in the power system. These characteristics can be evaluated according to predetermined benchmarks and technical parameters. This definition is given by the International Electrotechnical Commission (IEC). According to this definition, the power quality can be considered as the voltage quality, and the qualified power quality should be a sinusoidal waveform voltage of constant frequency and constant amplitude and continuous power supply.
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