Multi-dimensional voltage deviation index method based on statistic analysis of historical information of power grid

A technology of statistical analysis and historical information, applied in the field of multi-dimensional voltage deviation index based on the statistical analysis of historical information of the power grid, which can solve the problems such as the lag in the application value of historical data of the power grid.

Active Publication Date: 2013-05-01
EAST CHINA GRID +1
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Problems solved by technology

[0004] During the long-term operation of the power grid, a large amount of historical data has been accumulated. These data describe the long-term operation status and change trend of the power system, and contain the trend characteristics of the power grid operation. The development of

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  • Multi-dimensional voltage deviation index method based on statistic analysis of historical information of power grid
  • Multi-dimensional voltage deviation index method based on statistic analysis of historical information of power grid
  • Multi-dimensional voltage deviation index method based on statistic analysis of historical information of power grid

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Embodiment Construction

[0040] see Figure 1 to Figure 3 , the present invention provides a multi-dimensional voltage deviation index method based on statistical analysis of power grid historical information, comprising the following steps:

[0041] A. Preprocessing of voltage information: take out the voltage information of the plant and station within the undetermined time interval from the database, the voltage information includes time attributes, space attributes and equipment set attributes; firstly divide the voltage level into layers, with 0.5kV as a grade, Then the voltage information is counted according to different grades, such as figure 2 As shown, the basis for the statistical calculation of the subsequent voltage deviation index is established.

[0042] figure 2 It shows the subroutine flow of voltage offset statistics. Firstly, count the occurrence times of different bus voltages, and the voltage level interval is 0.5kV; take the upper and lower limits of the factory station asses...

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Abstract

The invention relates to a multi-dimensional voltage deviation index method based on the statistic analysis of the historical information of a power grid. The method comprises the following steps of: preprocessing voltage information: acquiring the station voltage information including time attributes, space attributes and equipment set attributes in an undetermined time interval from a database; calculating an early warning median value: reading the upper limit and the lower limit of a voltage early warning value, and calculating a median of the voltage early warning value so as to enable voltage deviation indexes (VDI) to have the capability of out-of-limit early warning; and carrying out sorting calculation on multi-dimensional voltage deviation indexes: carrying out statistic analysis and calculation on voltage data within a period of time T to obtain important voltage indexes VDI of a single station and the power grid. According to the invention, a VDI curve is drawn according to statistic calculation results, a reference basis is provided for the regulation of the voltage, the regulation of a reactive power control strategy and the basis planning, configuration and switching of reactive-load compensation equipment so as to assist a dispatcher in learning the current running health degree and the variation trend of the power grid, and a reliable auxiliary strategy can be provided for the running mode adjustment and the risk preventive control of the power grid .

Description

technical field [0001] The invention relates to a statistical analysis type multi-dimensional voltage deviation index, based on the historical data of the voltage of the power grid plant and station, through the statistical analysis of the bus voltage information, the evaluation index representing the distribution of the voltage level is calculated, and particularly relates to a statistical analysis based on the historical information of the power grid The multi-dimensional voltage deviation index method reflects the health and change trend of the current power grid (plant) voltage and reactive power level, provides a basis for voltage regulation and reactive power control strategy adjustment, and also provides a basis for the configuration of reactive power compensation devices And switching to provide information support. Background technique [0002] The grid voltage and reactive power level are one of the direct reflections of the operating state of the power system. Wh...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06Q50/06
CPCY04S10/545Y04S10/60Y02E40/76Y02E40/70Y04S10/50
Inventor 许凌李维周毅秦康平周良才申屠刚徐尧强吴超周晓苏米向宾郭佳姚新苗裘天亮
Owner EAST CHINA GRID
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