Grid stability judging method based on grid PMU big data

A discrimination method and stability technology, applied in the direction of electrical components, circuit devices, etc., to achieve the effects of high robustness, safety and reliability, and a wide range of applications

Active Publication Date: 2017-01-25
SHANGHAI JIAO TONG UNIV
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  • Claims
  • Application Information

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Problems solved by technology

Huge power grid status data brings possibilities to the analysis of smart grid, but also faces challenges

Method used

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  • Grid stability judging method based on grid PMU big data
  • Grid stability judging method based on grid PMU big data
  • Grid stability judging method based on grid PMU big data

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Embodiment Construction

[0027] The present invention will be further described below in conjunction with specific embodiments and accompanying drawings.

[0028] Such as figure 1 As shown, a power grid stability judgment method based on power grid PMU big data includes the following steps:

[0029] 1) According to the power grid PMU data, the random matrix is ​​used for modeling, and the power grid stability analysis is transformed into a random matrix analysis problem, including the following sub-steps:

[0030] 1.1) According to the operating status of the grid, the grid is divided into four types, namely: the topology of the grid remains unchanged, the topology of the grid changes, the power supply of the grid remains unchanged, and the power supply of the grid increases or decreases;

[0031] 1.2) Observe and record the PMU data of nodes at all levels of the power grid in four operating states;

[0032] 1.3) Starting from the grid power flow equation, establish the relationship between the obse...

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Abstract

The invention relates to a grid stability judging method based on grid PMU big data, and belongs to two fields of grid big data analysis and grid stability analysis. The method comprises the following steps: firstly, performing modeling according to grid PMU data through a random matrix; secondly, analyzing grid PMU historical data, and establishing a distribution up and down boundary map of the PMU historical data; thirdly, analyzing grid PMU real-time data, and establishing a characteristic value distribution map of the PMU real-time data; fourthly, displaying and comparing the characteristic value distribution map of the PMU real-time data and the distribution up and down boundary map of the PMU historical data on the same interface, so as to judge whether a grid is stable or not. According to the method, the grid stability is cognized according to statistic characteristics, such as the PMU historical data and the PMU real-time data, and the requirements of the grid, and can be displayed through a human-computer interface, so that the grid is convenient for a grid operation and maintenance administrator to use.

Description

technical field [0001] The invention relates to two fields of power grid big data analysis and power grid stability analysis, in particular to a power grid stability judgment method based on power grid PMU big data. Background technique [0002] The development of smart grid is changing with each passing day, and its corresponding smart grid new technologies are also emerging. The topological structure of the power grid is also becoming more and more complex. The stable operation of the smart grid needs to meet the following conditions: the basic system of the power grid and related supporting technologies can sufficiently resist unpredictable external disturbances; The impact on the power grid, so that the power grid can quickly identify and isolate faults; the compatibility of the power grid is better, and it can adapt to the connection and withdrawal of a large number of distributed micro-grids and other charging and discharging facilities; the operation and maintenance c...

Claims

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Application Information

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IPC IPC(8): H02J13/00
CPCH02J13/0017
Inventor 罗伯特.才明.邱储磊贺兴林泽南刘海春
Owner SHANGHAI JIAO TONG UNIV
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