Inventor

LI YOUYI

SE22 patents

⚠️ This page may combine multiple inventors who share the name “LI YOUYI”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.

LI YOUYI

HITACHI ENERGY SWITZERLAND AG

Zero sequence current based line differential protection solution

High sensitive phase selection method

Time domain distance protection based on polarity comparison for power transmission lines

Method, system and apparatus for fault detection in line protection for power transmission system

Method for detecting fault in power transmission line and protection system using the same

Determining of a power line fault

ABB SCHWEIZ AG

Fault detection of a transmission line

Travelling wave protection of a transmission line

Method and apparatus for detecting fault in a mixed configuration power transmission line

Method for detecting fault and current differential protection system thereof

Method and apparatus for detection of power system disturbance within a digital substation

ABB POWER GRIDS SWITZERLAND AG

Method and control system for fault direction detection

Method and control system for faulted phase detection

Travelling wave pilot protection of a transmission line based on time synchronization

Travelling wave protection of a transmission line based on high-pass filtering

LI YOUYI

Method for identifying the fault by current differential protection and device thereof

Synchronization method for current differential protection

Method for detecting network asymmetrical status and asymmetrical communication channels for power system

YANG YING

Voltage based method for fault identification in a transmission line apparatus thereof

SU BIN

Method and apparatus for detecting communication channel delay asymmetry

HITACHI ENERGY LTD

Differential protection of a transmission line

HOU TIEXIN

Integrated device suspended at high voltage potential for power energy metering and protection of distribution network