Unlock instant, AI-driven research and patent intelligence for your innovation.

Differential protection mal-operation control method and system

A technology of differential protection and control method, applied in the field of electric power, can solve problems such as malfunction

Inactive Publication Date: 2015-09-09
CHINA PETROLEUM & CHEM CORP +1
View PDF2 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In order to solve the above-mentioned problem of differential protection misoperation, the present invention provides a differential protection misoperation control method and system, so that the water injection motor can be started and put into operation normally

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Differential protection mal-operation control method and system
  • Differential protection mal-operation control method and system
  • Differential protection mal-operation control method and system

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0017] In order to make the purpose, technical solutions and advantages of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are the Some, but not all, embodiments are invented. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.

[0018] In the actual oil field substation, such as figure 2 The differential protection device shown is generally installed in the high-voltage motor switch cabinet. The two sets of current sensors in the differential protection use two sets of current transformers with the same capacity, one set is installed in the high-voltage switch cabinet, and the other set is installed A...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention discloses a differential protection mal-operation control method and system. According to the differential protection mal-operation control method, secondary load impedance of two groups of current transformers is balanced, so that unbalanced current can be decreased. Through balancing the secondary load impedance, mal-operation of a differential protection device when a motor is started can be avoided, and therefore, the water injection motor can be started normally and put into operation.

Description

technical field [0001] The invention relates to the field of electric power technology, in particular to a differential protection maloperation control method and system. Background technique [0002] The high-pressure water injection motor is the power device of the oilfield pumping station, and its safe and normal start-up plays an important role in the normal production of the oilfield. [0003] In oilfield crude oil production, in order to ensure the safe operation of water injection motors, differential protection devices and two sets of current transformers (Current Transformer, CT for short) connected to the differential protection devices are installed in the motor circuit with a capacity of more than 2000kW. figure 1 is a schematic diagram of motor differential protection in the prior art, figure 2 It is the secondary wiring diagram of motor differential protection in the prior art. The motor M in the figure is installed at the water injection station, which is re...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(China)
IPC IPC(8): H02H7/08H02H3/26
Inventor 杜正旺刘明明许红燕张丽王殿臣黄志宏邵立群荣伟吕书栋范玉斌王亮李波
Owner CHINA PETROLEUM & CHEM CORP