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PCE
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IPC Subgroup
H02J 1/1

Parallel operation of DC sources

Introduced: September 1968

Last revised: January 2026

Full Title

Circuit arrangements for DC mains or DC distribution networks > Parallel operation of DC sources

Classification Context

Section:
ELECTRICITY
Class:
GENERATION, CONVERSION, OR DISTRIBUTION OF ELECTRIC POWER
Subclass:
ELECTRIC POWER NETWORKS; CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY

Additional Content

Parallel operation in networks using both storage and other DC sources, e.g. providing buffering

3 direct subcodes

Child Classifications

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  • H02J 1/102 being switching converters
  • H02J 1/108 having arrangements for blocking reverse current flow, e.g. using diodes
  • H02J 1/12 Parallel operation of DC sources having power converters with further DC sources without power converters

Top Applicants

Top 10 applicants by patent filingsfor class H02, 2013–2023, worldwide · Source: EPO PATSTAT

  1. SGCC(STATE GRID CORPORATION OF CHINA) 54,496
  2. MITSUBISHI ELECTRIC CORPORATION JP 10,495
  3. TOYOTA MOTOR CORPORATION 9,464
  4. GUANGDONG POWER GRID CORPORATION 9,339
  5. ROBERT BOSCH DE 8,226
  6. SIEMENS DE 8,218
  7. DENSO CORPORATION 7,063
  8. MITSUBISHI ELECTRIC CORPORATION 6,619
  9. SAMSUNG ELECTRONICS COMPANY KR 5,826
  10. GREE ELECTRIC APPLIANCES 5,094