Electric power system protection strategy constant value issuing method and system

A technology for power system protection and system protection, which is applied to emergency protection circuit devices, information technology support systems, electrical components, etc., can solve the problems that system protection actions cannot guarantee safe and stable operation, and insufficient consideration of correlation, so as to improve automation management level, the effect of increasing reliability

Active Publication Date: 2021-03-16
JIANGSU ELECTRIC POWER CO +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In order to ensure the stable operation of the power grid, the policy setting value set in the system protection strategy usually considers to retain a large margin. However, in some special operating scenarios, due to the mismatch between the power grid operation mode and the offline typical mode, there are system protection actions that still cannot To ensure the risk of safe and stable operation, it is necessary to adjust the system protection setting value online based on the power grid operating conditions and the online strategy of system protection
In order to realize the timely and reliable effect of online setting on the system protection device, it is necessary to study a method for automatically and reliably sending the online strategy setting of the system protection. Insufficient consideration is given to the correlation of operating conditions, and all verification work is carried out at the plant station

Method used

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  • Electric power system protection strategy constant value issuing method and system
  • Electric power system protection strategy constant value issuing method and system
  • Electric power system protection strategy constant value issuing method and system

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Embodiment 1

[0032] The data interaction block diagram of the dispatching end where the system protection device is located and the plant station end in the process of sending the fixed value in the present invention is as follows figure 1 As shown, the dispatching terminal is composed of data collection, operation mode comparison, setting value online setting, online setting value checking, and online setting value sending function. The dispatcher performs online setting calculation of the fixed value based on the collected data, and after generating the result, sends it to the station device through online setting interaction.

[0033] The specific process of issuing the present invention is as follows: figure 2 shown, including the following steps:

[0034] Step 1. The dispatching end obtains the operating mode data (including component switching and section power data), DC control mode, pressure plate switching status and controllable quantity actual measurement information from the ...

Embodiment 2

[0052] The present invention also provides a power system protection strategy value confirmation system, including:

[0053] Acquisition module: used for dispatching end to obtain real-time operation mode data (element switching, section power), DC control mode, pressure plate switching status and controllable quantity actual measurement information from the system protection device in real time;

[0054] Fixed value calculation module: It is used to splice the information related to the fixed value from the actual measurement information obtained by the dispatching end into a real-time operation mode word, and perform online setting calculation of the fixed value according to the power grid model and the actual measurement data sent by the device, and obtain the attached operation mode word online value setting;

[0055] Fixed value confirmation module: used to check the online fixed value based on the real-time operation mode data and ultra-short-term forecast data of the po...

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Abstract

The invention discloses an electric power system protection strategy constant value issuing method. The method comprises the following steps: 1) acquiring operation mode data (element on-off and section power), a direct current control mode, a pressing plate on-off state and actual measurement information of a controllable quantity from a system protection device in real time by a scheduling end;2) splicing related information in the actual measurement information obtained by the scheduling end into a real-time operation mode word, and performing constant value online setting calculation according to the actual measurement data uploaded by the power grid model and the device to obtain an online constant value with the operation mode word; 3) checking the online constant value based on thereal-time operation mode data and the ultra-short-term prediction data of the power grid, if the check is passed, submitting the online constant value to a constant value issuing module, and otherwise, returning to the step 2); and 4) making the online constant value issuing module and the plant station end take effect after interactive confirmation. According to the invention, reliable issuing of the system protection online strategy constant value is realized through triple confirmation of comparison of operation mode words, checking of the online constant value and an online constant valueissuing process.

Description

technical field [0001] The invention belongs to the technical field of electric power systems and automation thereof, and in particular relates to a method and system for confirming value determination of electric power system protection strategies. Background technique [0002] The system protection device involves many strategic settings. For the receiving end power grid system protection, it includes such as raising the action threshold power of DC and pumped-storage cut-off pumps, boosting the action threshold power of DC and pumped-storage cut-off pumps, cutting the interruptible load action threshold power, The strategic settings such as interruptible load action, undercut power, etc., such settings on the device are generally written into the device before the system leaves the factory or trial operation, and are manually modified according to the operation needs in actual operation. In order to ensure the stable operation of the power grid, the policy setting value s...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02H7/26H02J3/00
CPCH02H7/26H02J3/00H02J2203/20Y04S10/20
Inventor 刘林徐健罗建裕王阳罗凯明徐雄峰周挺王健王雄飞谢丹丹
Owner JIANGSU ELECTRIC POWER CO
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