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Power grid evolution trend analysis method

A trend analysis, power grid technology, applied in the field of power system, can solve problems such as poor practicability of calibration methods

Active Publication Date: 2021-04-23
STATE GRID LIAONING ELECTRIC POWER RES INST +2
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Problems solved by technology

[0004]Current technologies and patents seldom study the verification method of the power grid operation trend. The general verification method does not combine the laws and characteristics of the actual power grid operation. The experimental method is not practical

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Embodiment Construction

[0024] The present invention will be further explained below in conjunction with the accompanying drawings and embodiments.

[0025] The present invention is a method for analyzing the evolution trend of a power grid. First, it proposes static security trend analysis, transient security trend analysis, small disturbance stability trend analysis, short-circuit current trend analysis, and voltage stability trend analysis methods that are different from traditional online stability analysis; secondly, it summarizes The dominant factors that affect the changes in the stability of the power grid are classified and summarized into an index system that can evaluate the future stability of the power grid; finally, focusing on the "quick assessment" of the future trend of the power grid, the dynamic power flow calculation method is used to meet continuous power flow calculations when power is unbalanced. Convergence, improve the robustness of the estimated step size of the existing cont...

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Abstract

A power grid evolution trend analysis method belongs to the technical field of power systems, and comprises the following steps of: 1, data check; 2, trend load flow calculation; 3, safety and stability trend analysis; 4, trend aid decision making; 5, task parallel computing; and 6, calculation process monitoring. According to the power grid evolution trend analysis method, a stability feature and a safety index of a short-term future state are evaluated online by utilizing the trend of an online power grid, and the online operation trend change conclusion of the power grid is given according to the obtained load at an equivalent network node in combination with a current operation state of the power grid.

Description

technical field [0001] The invention belongs to the technical field of power systems, and in particular relates to a method for analyzing the evolution trend of a power grid. Background technique [0002] With the increasing size and complexity of the grid structure of the power system, there are certain difficulties in the analysis of grid security and stability. Dispatchers urgently need a system that can analyze the steady-state characteristics of the system, analyze the dynamic characteristics of the system, judge the current state of the system, and give the short-term operation Guidance aids. Due to the rapid development of computer performance, network and communication technology, it is possible to construct a large-scale computer group in the field of power engineering to perform high-speed calculations and obtain measurement data in a wide range of areas, so as to apply and promote online stability monitoring and early warning systems in power systems. An importan...

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Application Information

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IPC IPC(8): H02J3/00H02J13/00
CPCH02J3/00H02J13/00001H02J13/00002H02J2203/20H02J2203/10Y04S10/50
Inventor 王顺江王爱华苏安龙赵琰王伟姜河王东来金宜放许睿超王铎
Owner STATE GRID LIAONING ELECTRIC POWER RES INST
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