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System regional inertia evaluation method based on disturbance data

A sub-regional and regional technology, which is applied in the field of system sub-regional inertia evaluation based on disturbance data, can solve the problem that power unbalance is difficult to obtain, and achieve an easy-to-obtain effect

Active Publication Date: 2020-03-31
NORTH CHINA ELECTRIC POWER UNIV (BAODING)
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Problems solved by technology

[0005] The purpose of the present invention is to provide a method for evaluating the inertia of the system in different regions based on disturbance data. The method can accurately evaluate the inertia level of the power system, and the parameters required to be measured are less and easy to obtain, which solves the problem of power imbalance in actual measurement. hard to get problem

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  • System regional inertia evaluation method based on disturbance data
  • System regional inertia evaluation method based on disturbance data
  • System regional inertia evaluation method based on disturbance data

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Embodiment Construction

[0016] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0017] Embodiments of the present invention will be further described in detail below in conjunction with the accompanying drawings, as figure 1 Shown is a schematic flowchart of a method for evaluating inertia of a system based on disturbance data in an embodiment of the present invention, and the method includes:

[0018] Step 1. When the power system is disturbed and the power imbalance occurs, analyze the frequency response characteristics of t...

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Abstract

The invention discloses a system regional inertia evaluation method based on disturbance data. The method comprises the steps: analyzing the frequency response characteristics of a disturbed power system when the power system is disturbed and the power is unbalanced, and obtaining key measurement parameters needed for evaluating the inertia of the power system; dividing the disturbed power systeminto a non-fault area and a fault area, and respectively calculating the inertia of the non-fault area and the fault area based on the key measurement parameters in the step 1; and further measuring the power and the frequency of each region on the tie line of each region after the disturbance of the power system, and evaluating the inertia of each region of the power system based on the measureddata. According to the method, the inertia level of the power system can be accurately evaluated, few parameters need to be measured and are easy to obtain, and the problem that the power unbalance amount is difficult to obtain in actual measurement is solved.

Description

technical field [0001] The invention relates to the technical field of inertia evaluation of electric power systems, in particular to a method for evaluating inertia of a system sub-area based on disturbance data. Background technique [0002] With the development of new energy power generation technology, the proportion of new energy power generation in the power system continues to increase. The new energy power generation system is connected to the power system through power electronic equipment, and its power output is decoupled from the grid frequency. The system provides inertia support and frequency control. With the increase of the proportion of new energy in the power grid, the equivalent inertia of the power grid decreases, and the ability to maintain system frequency stability decreases. Relevant literature points out through statistical analysis that in the past 20 years, due to the large-scale access of new energy, Europe, Japan, The equivalent inertia of power...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J3/00
CPCH02J3/00
Inventor 毕天姝刘方蕾胥国毅
Owner NORTH CHINA ELECTRIC POWER UNIV (BAODING)
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