Differential protection determination method

Number of patents in Portfolio can not be more than 2000

United States of America Patent

PATENT NO 11764568
APP PUB NO 20210344190A1
SERIAL NO

16761022

Stats

ATTORNEY / AGENT: (SPONSORED)

Importance

Loading Importance Indicators... loading....

Abstract

See full text

Provided is a determination method of differential protection suitable for an electricity transmission line with multi-terminal T-connection. The determination method includes: sampling and calculating all phase currents, and calculating a maximum fault component current Δİmax in phase current amplitudes of each phase current, a differential current Icd in the each phase current, a resistive current Ires in the each phase current and a vector sum ΔİΣ of fault component currents except Δİmax in the phase current amplitudes of the each phase current; and comparing the maximum fault component current Δİmax in phase current amplitudes of each phase current and a threshold setting value Imax0, determining a value of a resistive coefficient K corresponding to the phase current amplitudes of the each phase current according to a comparison result, and performing differential determination on the differential current Icd and the resistive current Ires in phase current amplitudes of the each phase current according to a differential determination formula: if the differential current Icd of the target phase satisfies the above differential determination formula, it is determined that a fault occurs in an area of the target phase.

Loading the Abstract Image... loading....

First Claim

See full text

Family

Loading Family data... loading....

Patent Owner(s)

Patent OwnerAddress
STATE GRID CORPORATION OF CHINANO 86 WEST CHANG'AN STREET XICHENG DISTRICT BEIJING 100031
TAIZHOU POWER SUPPLY COMPANY OF STATE GRID ZHEJIANG ELECTRIC POWERNO 809 CENTRAL STREET JIAOJIANG DISTRICT TAIZHOU ZHEJIANG 318000

International Classification(s)

Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Huang, Zhen Zhejiang, CN 185 656
Jiang, Xu Zhejiang, CN 23 212
Li, Ben Jiangsu, CN 15 24
Li, Hao Zhejiang, CN 490 4123
Qin, Zheng Zhejiang, CN 36 1397
Qiu, Yutao Zhejiang, CN 2 1
Shen, Yiping Zhejiang, CN 18 117
Tan, Hao Jiangsu, CN 17 37
Wang, Kang Zhejiang, CN 120 474
Wu, Jian Zhejiang, CN 381 2209
Xu, Hua Zhejiang, CN 521 8413
Xu, Xiaochun Jiangsu, CN 65 300
Ying, Guode Zhejiang, CN 10 1
Zhang, Chi Zhejiang, CN 378 2286
Zhao, Ping Zhejiang, CN 40 182
Zhao, Qingchun Jiangsu, CN 4 12
Zheng, Yuande Zhejiang, CN 6 1
Zhou, Chen Zhejiang, CN 65 725
Zhou, Zaibing Zhejiang, CN 3 1
Zhu, Tao Zhejiang, CN 79 215
Zhu, Xiaotong Jiangsu, CN 4 1

Cited Art Landscape

Load Citation

Patent Citation Ranking

Forward Cite Landscape

Load Citation

Maintenance Fees

Fee Large entity fee small entity fee micro entity fee due date
3.5 Year Payment $1600.00 $800.00 $400.00 Mar 19, 2027
7.5 Year Payment $3600.00 $1800.00 $900.00 Mar 19, 2031
11.5 Year Payment $7400.00 $3700.00 $1850.00 Mar 19, 2035
Fee Large entity fee small entity fee micro entity fee
Surcharge - 3.5 year - Late payment within 6 months $160.00 $80.00 $40.00
Surcharge - 7.5 year - Late payment within 6 months $160.00 $80.00 $40.00
Surcharge - 11.5 year - Late payment within 6 months $160.00 $80.00 $40.00
Surcharge after expiration - Late payment is unavoidable $700.00 $350.00 $175.00
Surcharge after expiration - Late payment is unintentional $1,640.00 $820.00 $410.00