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Power system inertia estimation method and device based on new energy output proportion

A power system and new energy technology, applied in the field of inertia estimation, to achieve the effect of speeding up the construction

Active Publication Date: 2021-08-20
NORTH CHINA ELECTRIC POWER UNIV (BAODING)
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Problems solved by technology

[0004] Aiming at the problems in the prior art, the present invention provides a method and device for estimating the inertia of a power system based on the output ratio of new energy sources, so as to solve the problem of estimating the range of inertia under any output ratio of new energy sources in any system

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  • Power system inertia estimation method and device based on new energy output proportion
  • Power system inertia estimation method and device based on new energy output proportion
  • Power system inertia estimation method and device based on new energy output proportion

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Embodiment Construction

[0044] Now refer to the attached Figure 1 to Figure 3 Introducing exemplary embodiments of the invention, figure 1 It is a flow chart of a method for estimating the inertia of a power system based on the proportion of new energy output according to an embodiment of the present invention.

[0045] refer to figure 1 , the method for estimating the power system inertia based on the new energy output ratio provided by the embodiment of the present invention includes the following steps:

[0046] S101: Obtain the parameters of each unit in the power grid and the historical data of system power flow, and determine the key parameters and key historical data of power flow according to the parameters of the units and the historical data of system power flow;

[0047] S103: Perform statistical processing on the key parameters, and obtain the correlation coefficient in combination with the historical data of the power flow;

[0048] S105: Obtain the inertia range of the pre-started new...

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Abstract

The invention relates to a power system inertia estimation method and device based on a new energy output proportion. The method comprises the following steps: acquiring parameters and system power flow historical data of each unit of a power grid, and determining key parameters and power flow key historical data of each unit of the power grid according to the parameters and the system power flow historical data; carrying out statistical processing on the key parameters, and acquiring correlation coefficients in combination with the power flow key historical data; obtaining an inertia range of a pre-started new energy unit containing virtual inertia; and according to the key parameters, the correlation coefficient and the virtual inertia range, estimating a system inertia range under different new energy output proportions by using the new energy output proportions and the total power generation amount. The method solves the problem that inertia is unknown when the system is in different new energy output proportions, and can realize the perspectiveness of inertia estimation when making a start-up mode decision for improving the overall new energy output proportion in the system or performing new energy installation planning on a certain region.

Description

technical field [0001] The present invention relates to the technical field of inertia estimation, in particular to a method and device for estimating the inertia of a power system based on the proportion of new energy output. Background technique [0002] In recent years, with the increasing proportion of my country's new energy in the power grid, the system inertia level has been decreasing. Since the reduction of the inertia level will have a series of negative effects on the system frequency when a power shortage occurs, inertia has become a key issue affecting the increase in the proportion of new energy in the process of my country's power grid moving towards a new power system with new energy as the main body. [0003] The current inertia estimation method usually estimates the inertia and the minimum inertia under the real-time output ratio with the help of frequency or power change measurement data, and the emphasis is on real-time performance. However, when making...

Claims

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Application Information

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IPC IPC(8): H02J3/46H02J3/48
CPCH02J3/46H02J3/48H02J2300/24H02J2300/28Y02E10/56
Inventor 张东英任凯奇张永旭李笑宇梁贵莉田一淳崔舵
Owner NORTH CHINA ELECTRIC POWER UNIV (BAODING)
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