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Smart grid-oriented power quality monitoring system and method

A power quality monitoring and smart grid technology, applied in the measurement of electrical variables, signal transmission systems, measurement of electricity and other directions, can solve problems such as insufficient high-speed, high-performance real-time data transmission and processing capabilities, improve the analog-to-digital conversion rate, and facilitate upgrades and expansions , the effect of meeting the monitoring needs

Active Publication Date: 2011-05-11
PONOVO POWER
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] In order to make up for the shortcomings of the existing technology, the present invention provides a smart grid-oriented power quality monitoring system and method to solve the defects of high-speed, high-performance, real-time data transmission and insufficient processing capabilities in the prior art

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  • Smart grid-oriented power quality monitoring system and method

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Embodiment 1

[0044] This embodiment specifically describes a smart grid-oriented power quality monitoring system proposed by the present invention.

[0045] Such as figure 1 As shown, the system includes a distributed power quality online / offline node detection module, a network communication module, a distributed database integrated management module, and a power quality monitoring system integrated management module;

[0046] In terms of hardware design, the distributed power quality online / offline node monitoring module not only meets the basic performance index requirements for the measurement of complex power quality signals, but also considers the safety, reliability and low failure requirements of the detection device. The devices will not affect each other and can work together. This module is used to realize the basic distributed measurement function of the smart grid at the bottom of the power signal.

[0047] Such as figure 2 As shown, the distributed power quality online / off...

Embodiment 2

[0066] This embodiment specifically describes a smart grid-oriented power quality monitoring method proposed by the present invention.

[0067] Such as Figure 5 As shown, the method includes the following steps:

[0068] Step 1: Initialize the distributed power quality monitoring system;

[0069] Configure the basic functions of each node of the distributed power quality monitoring system through the main control management module, such as continuous tracking and monitoring of indicators such as voltage deviation, frequency deviation, harmonics, voltage fluctuations and flicker, and three-phase unbalance; and then The configuration command is sent to each monitoring node through the distributed communication network; after receiving the configuration command, each monitoring node starts the corresponding self-calibration program, and enters the corresponding monitoring state according to the monitoring mode described in the command after the self-calibration is successful. ...

Embodiment 3

[0083] Such as Figure 6 As shown, this embodiment specifically describes the parallel analog-to-digital conversion in the technical solution proposed by the present invention. Through the analog acquisition terminal module, the actual power signal is converted into a standard electrical input interface, and divided into four channels for the analog-to-digital conversion chip, and the analog-to-digital conversion chip is driven by the clock distribution module and the clock module to collect the incoming input in turn The signal is then transmitted to the parallel processing module through the programmable logic interface for power quality signal processing and data compression; through self-calibration, the accuracy of the analog acquisition terminal module is calibrated to realize the self-calibration function of the detection terminal module.

[0084] The clock distribution module divides a clock cycle evenly into 4 phases: 0-90 degrees, 90-180 degrees, 180-270 degrees, 270...

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Abstract

The invention provides a smart grid-oriented power quality monitoring system and a smart grid-oriented power quality monitoring method, which relate to the field of monitoring of power quality. The system comprises a distributed online / offline node detection module, a network communication module, a distributed database module and a comprehensive management module of the power quality monitoring system, wherein the distributed online / offline node detection module comprises a parallel analog-to-digital conversion module and a signal processing module so as to realize distributed detection of asmart grid. In the technical scheme provided by the invention, a plurality of analog-to-digital conversion chips are connected in parallel and an analog signal is sampled, so that high-accuracy sampling rate of signals is increased and the detection requirement on transient power quality signals is met; based on a programmable logic chip, online analysis and data compression are realized by a parallel signal processing algorithm; a distributed database is adopted, so that system reliability is enhanced and system upgrade is promoted; and a global positioning system (GPS) and a communication network module are adopted, so that a distributed network system is realized, and power quality monitoring of the smart gird is supported powerfully.

Description

technical field [0001] The invention relates to the field of power quality monitoring, and specifically proposes a smart grid-oriented power quality monitoring system and method. Background technique [0002] The content of the concept of power quality in modern power systems is becoming more and more abundant and complex. On the one hand, the working conditions of the actual power system have become more complex. Modern high-power power electronic equipment has been widely used in various fields of society, such as industry and household appliances. They are nonlinear loads for the power system. There will be an impulsive response and continuous injection of harmonics into the grid. Non-linear operating characteristics such as impulse response will deteriorate the normal operating performance of the grid, and even destroy the stable operation of the grid; while harmonics reduce the effective capacity of the grid and increase additional useless power consumption. On the ot...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R31/00G08C17/00
Inventor 陈卫胡志琳
Owner PONOVO POWER
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