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Efficiency analysis method for accessing of ultrahigh voltage grid to receiving end grid

A receiving-end power grid and analysis method technology, applied to load forecasting, electrical components, circuit devices, etc. in the AC network, to achieve the effect of enhancing foresight and improving safety and stability

Active Publication Date: 2018-03-23
STATE GRID TIANJIN ELECTRIC POWER +1
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  • Abstract
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  • Application Information

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Problems solved by technology

However, there is currently no general efficiency analysis method for connecting UHV power grids to receiving power grids

Method used

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  • Efficiency analysis method for accessing of ultrahigh voltage grid to receiving end grid

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Embodiment Construction

[0024] The method for analyzing the performance of the UHV power grid connected to the receiving end power grid provided by the present invention will be described in detail below with reference to the accompanying drawings and specific embodiments.

[0025] Such as figure 1 As shown, the efficiency analysis method for connecting the UHV power grid to the receiving end power grid provided by the present invention includes the following steps executed in sequence:

[0026] Step 1) Use the power system calculation tool BPA to calculate the V of each node in the receiving end grid before the UHV grid is connected i The short circuit current C 0 (i), main grid line L i trend S 0 (i), tie line LL i The trend of SS 0 (i);

[0027] Step 2) Use the power system calculation tool BPA to calculate the V of each node in the receiving end grid after the UHV grid is connected. i The short circuit current C 1 (i), and judge each node V i The short circuit current C 1 (i) Whether it...

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Abstract

The invention provides an efficiency analysis method for accessing of an ultrahigh voltage grid to a receiving end grid. The indicators of the aspects of the grid safety and stability level, the energy supply safety and the energy saving and emission reduction benefit are calculated to omnibearingly analyze the influence of accessing of the ultrahigh voltage grid from multiple perspectives so as to enhance the operation safety and stability of the grid. The influence on the short circuit current level, the network frame power flow distribution and the contact line safety margin is mainly considered for the influence of the access efficiency of the ultrahigh voltage grid in the aspect of grid safety and stability level; the influence of ultrahigh voltage power on the power supply and demandbalance is mainly considered for the influence of the access efficiency of the ultrahigh voltage grid in the aspect of energy supply safety; and the influence of ultrahigh voltage power on saving standard coal and reducing carbon dioxide, sulfur dioxide and nitrogen oxide emission is mainly considered for the influence of the access efficiency of the ultrahigh voltage grid in the aspect of the energy saving and emission reduction benefit.

Description

technical field [0001] The invention belongs to the technical field of power grid operation, and in particular relates to an efficiency analysis method for an ultra-high voltage power grid connected to a receiving end power grid. Background technique [0002] The development of UHV power grid will be conducive to the implementation of large-scale, long-distance, high-efficiency power transmission, thereby promoting the intensive development of renewable energy bases such as large coal power, large hydropower, large nuclear power, and large wind power, and meeting the rapidly growing power of the receiving end grid. need. However, after the UHV power grid is connected, it will bring changes to the structure and form of the receiving power grid, and at the same time, it will have a certain impact on ensuring energy supply security and promoting energy conservation and emission reduction. The connection of the UHV power grid to the receiving-end power grid is not only in line ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J3/00H02J3/06
CPCH02J3/00H02J3/003H02J3/06H02J2203/20
Inventor 李媛媛宣文博丁承第王魁闫大威雷铮周进崔广胜宋佳刘忠义王建磊
Owner STATE GRID TIANJIN ELECTRIC POWER
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