Power system online monitoring system

A technology for power systems and monitoring systems, applied in the field of power systems, can solve problems such as inability to clear old data, slow data processing, and deviation of solution values.

Active Publication Date: 2019-10-29
福建睿思特科技股份有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In the prior art, with the identification of the power system, the amount of processed data is getting larger and larger, which greatly increases the computer processing power required to process the data, making the data processing speed slower or the cost of processing data increased.
In addition, in the prior art, the recursion of the least squares method is carried out by weighting the forgetting factor. On the one hand, the old data cannot be completely cleared. On the other hand, in some existing technologies, the total weighted value of the old data and the new data Greater than 1 makes the solution value offset

Method used

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Embodiment Construction

[0052] Below in conjunction with accompanying drawing and embodiment the present invention will be further described:

[0053] The power system is a complex time-varying system, such as figure 2 In the multi-source and multi-load power system shown, the total number of generators is i, and the total number of loads is j. The voltage gain matrix K and grid impedance matrix Z are introduced to represent the characteristics of the power system transmission network. Based on Kirchhoff’s voltage and current law, The power network model based on the whole network can be obtained:

[0054] V=KE-ZI(1);

[0055] The synchronized phasor measurement unit (PMU) on the power system network node continuously samples the power supply voltage phasor E on each engine node n , the load voltage V on the load node n and the current phasor I at the load node n ; The supply voltage phasor E n =[E (1,n) ,E (2,n) ,...,E (i,n) ] T , the load voltage on the load node V n =[V (1,n) ,V (2,n)...

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Abstract

The invention discloses a power system online monitoring system, which relates to the power system and comprises a data acquisition module, an identification matrix determination module, a recursion initialization module, a recursion solving module, a gain impedance splitting module, a fault quantity determination module and a fault grading module; the process comprises the following steps: firstly, obtaining a power supply voltage phasor on each engine node, a load voltage on a load node and a current phasor through sampling; and then, solving a current estimated value of an identification parameter matrix, determining a fault item of the power system, estimating an operation state of the power system, and outputting an alarm prompt. According to the online monitoring system, the previousdata is eliminated, so that the calculation processing amount is reduced; the data far away from the current moment is eliminated, and the system precision is effectively improved.

Description

technical field [0001] The invention relates to the field of power systems, in particular to an on-line monitoring system of the power system. Background technique [0002] The power system is an electric energy production and consumption system composed of power plants, power transmission and transformation lines, power supply and distribution stations, and power consumption. Its function is to convert the primary energy in nature into electric energy through the power generation device, and then supply the electric energy to various users through power transmission, transformation and distribution. In order to realize this function, the power system also has corresponding information and control systems in various links and different levels to measure, adjust, control, protect, communicate and dispatch the production process of electric energy, so as to ensure that users obtain safe and high-quality electric energy. . [0003] The main structure of the power system inclu...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R31/00G06F17/50
CPCG01R31/00G06F30/367Y04S10/22Y02E40/70Y02E60/00
Inventor 黄伟鹏廖兴旺
Owner 福建睿思特科技股份有限公司
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