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Method and system for improving estimated values of lines of SCADA (supervisory control and data acquisition) system

A technology of estimated value and circuit, applied in the direction of calculation, data processing application, special data processing application, etc., can solve problems such as undiscussed distinction, achieve the effect of reducing redundancy, overcoming mutual influence, and high engineering practical value

Active Publication Date: 2017-06-13
SHENZHEN POWER SUPPLY BUREAU
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  • Application Information

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Problems solved by technology

Moreover, previous related studies have not discussed and differentiated according to different voltage levels

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  • Method and system for improving estimated values of lines of SCADA (supervisory control and data acquisition) system
  • Method and system for improving estimated values of lines of SCADA (supervisory control and data acquisition) system
  • Method and system for improving estimated values of lines of SCADA (supervisory control and data acquisition) system

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Embodiment Construction

[0034] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings.

[0035] Such as figure 1 As shown, in the embodiment of the present invention, a kind of method for improving the estimated value of the line on the SCADA system is provided, and the method includes:

[0036] Step S1. Obtain the SCADA measured data under the current power grid topology, and obtain the line impedances in the current power grid topology according to the obtained SCADA measured data, and further use the obtained line impedances as estimation parameters Estimating each line, calculating each line estimated value; wherein, the SCADA measured data is obtained by SCADA measuring the voltage and phase of each node and the power of each line in the current power grid topology;

[0037] The specific process is to determine the nodes and lines of the current...

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Abstract

The invention provides a method for improving estimated values of lines of an SCADA (supervisory control and data acquisition) system. The method comprises steps as follows: actually measured data of the SCADA system under a current power grid topological structure are acquired, line impedance is acquired and taken as estimation parameters for estimation of the lines, and estimated values of the lines are calculated, wherein the actually measured data of the SCADA system are acquired by actually measuring voltages and phases of nodes and line power through the SCADA system; voltage classes of the lines are determined, voltage per-unit values at the head end and the tail end of each line are adjusted, the line impedance is corrected according to the line estimated values and the adjusted voltage per-unit values at the head end and the tail end of each line and set as estimation parameters for re-estimation of the lines, and the re-estimated values of the lines are obtained. With the adoption of the method, network topology mistakes and parameter mistakes can be corrected simultaneously to improve the estimated values of the SCADA system and can be distinguished according to different voltage classes, and the method has a higher theoretical basis and higher engineering value.

Description

technical field [0001] The invention relates to the technical field of grid parameter estimation, in particular to a method and system for improving line estimation values ​​in a SCADA system. Background technique [0002] The modern energy management system (Energy Management System, referred to as EMS) is to use the grid parameters and the collected real-time information of the grid to analyze, evaluate and make decisions, and one of its important functions includes state estimation. Due to the lack of measured data, EMS usually uses the theoretical or empirical values ​​of power grid parameters for calculation, but there are various reasons why these parameters are often not maintained in a timely and correct manner, resulting in parameter errors that have long plagued the practical use of EMS. , seriously reduce the calculation accuracy of state estimation in local areas, and cause the follow-up advanced analysis and decision-making results of EMS to be inconsistent with...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F19/00G06Q50/06
CPCG06Q50/06G16Z99/00
Inventor 张宗包黄颖祺李艳江伟郝蛟刘岩杜进桥赵晶玲
Owner SHENZHEN POWER SUPPLY BUREAU
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