Power factor sampling method and power factor compensation equipment

• Main Authors: JIANG LUJUN, CHEN ZHIWEI, WANG JIAKAI
• Format: Patent
• Language: Chinese; English
• Published: 19.10.2011
• Subjects: CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTINGELECTRIC POWER; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER; ELECTRICITY; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERATION; MEASURING; MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES; PHYSICS; REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGYGENERATION, TRANSMISSION OR DISTRIBUTION; SYSTEMS FOR STORING ELECTRIC ENERGY; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS; TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINSTCLIMATE CHANGE; TESTING

The invention relates to a power factor sampling method and power factor compensation equipment, which aims at solving the problem of larger deviation on power factor parameter detection when a larger higher harmonic component exists in a power grid. The power factor compensation equipment comprises a microprocessor as well as a signal sampling circuit, a display circuit and a drive circuit connected with the microprocessor. The invention is not interfered by harmonic waves, does not need the support of a voltage synchronizing signal, can work stably, can additionally obtain the harmonic components of voltages and currents without complex Fourier calculation, and has extremely simple hardware circuits and a low cost.