STATE GRID HEBEI ELECTRIC POWER RESEARCH INSTITUTE

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Patent Activity in the Last 10 Years

Technologies

Intl Class Technology Matters Rank in Class
 
  
 
H02J CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY 2118
 
  
 
G01F MEASURING VOLUME, VOLUME FLOW, MASS FLOW, OR LIQUID LEVEL; METERING BY VOLUME 158
 
  
 
G01N INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES 1205
 
  
 
G01R MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES 1158
 
  
 
H01F MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES 183
 
  
 
H02M APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF 1101

Top Patents (by citation)

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Recent Publications

Publication # Title Filing Date Pub Date Intl Class
2017/0336,461 INTERNAL TRANSFORMER COMPOSITE-DEFECT FUZZY DIAGNOSTIC METHOD BASED ON GAS DISSOLVED IN OILAug 05, 15Nov 23, 17[G01N, G01R, H01F, G01F]

Recent Patents

Patent # Title Filing Date Issue Date Intl Class
9923367 Anti-islanding method for distributed generator in direct current distribution grid and anti-islanding device thereforSep 27, 15Mar 20, 18[H02J, H02H]
9882385 System for starting large-scale power load in micro-gridJun 24, 14Jan 30, 18[H02J, H02M]

Expired/Abandoned/Withdrawn Patents

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