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

System and method for detecting islanding of electrical machines and protecting same

A power system and isolated island technology, applied in the field of motors, can solve problems such as damage to power generation equipment

Inactive Publication Date: 2015-04-29
GENERAL ELECTRIC CO
View PDF5 Cites 1 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Islanding of these motors with the generation source under heavy load due to sudden tripping of the transmission line breaker on the grid side or otherwise disconnecting these transmission lines may cause overvoltage on the transmission line which may result in damage to the generation source or with the Devices associated with power generation sources such as converters and inverters

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
  • System and method for detecting islanding of electrical machines and protecting same
  • System and method for detecting islanding of electrical machines and protecting same
  • System and method for detecting islanding of electrical machines and protecting same

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0014] Before the present methods and systems are disclosed and described, it is understood that the methods and systems are not limited to specific general methods, specific components, or specific compositions. It is also to be understood that the techniques described herein are for the purpose of describing particular embodiments only and are not intended to be limiting.

[0015] As used in the specification and the appended claims, the singular forms "a" and "the" include plural referents unless the context clearly dictates otherwise. Here, ranges can be expressed as from "about" one particular value, and / or to "about" another particular value. When expressing such a range, another embodiment includes from the one particular value and / or to the other particular value. Similarly, when values ​​are expressed as approximations, by use of the antecedent "about," it will be understood that the particular value forms another embodiment. It will also be understood that the endp...

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

In one aspect, a method for protecting one or more electrical machines during an islanding event is provided. The method includes connecting one or more electrical machines to an alternating current (AC) electric power system, wherein the AC electric power system is configured to transmit at least one phase of electrical power to the one or more electrical machines or to receive at least on phase of electrical power from the one or more electrical machines; electrically coupling at least a portion of a control system to at least a portion of the AC electric power system; coupling at least a portion of the control system in electronic data communication with at least a portion of the one or more electrical machines; and detecting an islanding of the one or more electrical machines based on one or more conditions monitored by the control system.

Description

technical field [0001] The subject matter relates generally to electric machines, and more particularly, to a system and method for detecting an islanding event of one or more power generation sources and protecting the one or more power generation sources during the islanding event. Background technique [0002] Generally, a wind turbine generator includes a turbine having a rotor including a rotatable hub assembly having a plurality of blades. The blades transform mechanical wind energy into mechanical rotational torque that drives one or more generators via the rotor. The generator is typically, but not always, rotationally coupled to the rotor through a transmission. The variator is stepped up for the inherently low rotational speed of the generator's rotor to efficiently convert rotational mechanical energy into electrical energy that is fed into the grid via at least one electrical connection. Direct drive wind turbine generators without variable speed also exist. T...

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): H02J3/38H02H7/26
CPCH02J3/386H02J3/388F03D17/00F03D9/255H02J2300/28H02J3/381Y02E10/72Y02E10/76G01R19/165G01R21/00G01R25/00H02H7/06H02J3/38
Inventor 朱慧斌A. M. 里特E. V. 拉森A. M. 克罗多夫斯基S. A. 巴克邬雪琴S. 常
Owner GENERAL ELECTRIC CO