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Phasor representation for generating electric entity of polyphase AC electric power system

A power system and entity technology, applied in the field of monitoring polyphase AC power systems, can solve problems such as control decision degradation and emergency deterioration, and achieve the effects of improved use, increased response time, and small phasor measurement delays

Inactive Publication Date: 2009-08-19
姚子文
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Any erroneous phasor measurements during a power system failure or emergency will degrade control decisions and may worsen the emergency

Method used

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  • Phasor representation for generating electric entity of polyphase AC electric power system
  • Phasor representation for generating electric entity of polyphase AC electric power system
  • Phasor representation for generating electric entity of polyphase AC electric power system

Examples

Experimental program
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Effect test

Embodiment Construction

[0072] refer to figure 1 , a system for monitoring electrical characteristics of a power distribution system is shown generally at 10 in accordance with a first embodiment of the present invention.

[0073] In the illustrated embodiment, the system 10 includes a plurality of measurement devices 12, 14, and 16 that can be used to measure the instantaneous phase phase of multi-phase electrical entities at various geographically separated locations in a power distribution system. quantity.

[0074] refer to figure 2 , the method performed by each measurement device is shown generally at 20 . As shown at 22, the device receives synchronization signals from a remote source, such as a satellite in geosynchronous orbit, or a ground-based source, such as a Long Range Area Navigation (LORAN) signal transmitter. In the case where the synchronization signal is received from a satellite, the synchronization signal may be a signal generated by a global positioning system, eg a signal c...

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PUM

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Abstract

A phasor representation of an electrical entity at a geographical location in a multiple phase AC electric power system is produced by receiving a synchronization signal from a remote source, producing a sampling time signal in response to the synchronization signal and a local reference time signal, and producing samples representing an amount of the entity in respective ones of the phases in the AC power system in response to the sampling time signal and the electrical entity in respective ones of the phases in the AC power system. A transformation is performed on the samples to produce a two-axis rotating reference frame representation of the electrical entity in a two-axis rotating reference frame. For each sample, a representation of a sampling time associated with the sample is produced. The two-axis rotating reference frame representation and the representation of the sampling time comprise the phasor representation.

Description

technical field [0001] The present invention relates to monitoring polyphase AC power systems, and more particularly to methods and apparatus for generating phasor representations of electrical entities in polyphase AC power systems. Background technique [0002] The global electrical industry is facing many challenges, including aging infrastructure, growing demand, and rapid changes in the market, all of which threaten to reduce the reliability of power supply. [0003] The power supply industry is deregulating and forcing power systems to be more efficient. New methods for intelligently observing and managing power supplies and grids have emerged. [0004] Growing demand from economic and demographic changes has caused the global transmission and distribution system to reach the limits of its reliable operation without additional investment in generation. Operations and safety management are becoming increasingly important. [0005] The main purpose of operations and s...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J13/00G01R25/00G01R29/16G04R20/04
CPCY02E60/728Y04S10/265G01R29/18Y02E60/00Y04S10/00Y04S10/22Y02E40/70
Inventor 姚子文
Owner 姚子文