Operation voltage optimization method of extra-high voltage direct current transmission system

A technology of UHV DC and power transmission system, which is applied in the direction of AC network circuits, electrical components, circuit devices, etc., to achieve the effects of improving service life, optimizing operating voltage, and good promotion and application value

Active Publication Date: 2020-12-15
STATE GRID HUNAN ELECTRIC POWER +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in the existing technology, there is no cost-effective way to reduce the number of tap operations of the converter transformer and improve the transient voltage stability of the receiving end power grid.

Method used

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  • Operation voltage optimization method of extra-high voltage direct current transmission system
  • Operation voltage optimization method of extra-high voltage direct current transmission system
  • Operation voltage optimization method of extra-high voltage direct current transmission system

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Embodiment Construction

[0047] The present invention will be clearly and completely described below in conjunction with the accompanying drawings and embodiments, and the technical problems and beneficial effects solved by the technical solutions of the present invention are also described. It should be pointed out that the described embodiments are only intended to facilitate the implementation of the present invention understood without any limitation.

[0048] Based on the technical problems that are difficult to find, the present invention specifically provides a method for optimizing the operating voltage of the UHVDC transmission system. Based on the spinning reserve capacity of the unit, an optimal model of the operating voltage of the UHVDC transmission system is established, and the mathematical relationship between the operating voltage of the UHVDC transmission system and the variables such as the taps of the converter transformer, the trigger angle, and the DC current and the search method...

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Abstract

The invention discloses an operating voltage optimization method of an extra-high voltage direct current power transmission system. The method comprises the following steps of establishing an operating voltage optimization model of the extra-high voltage direct current power transmission system, and optimizing the operating voltage of the extra-high voltage direct current power transmission systemon the basis of mathematical relationships between the operating voltage of the extra-high voltage direct current power transmission system and variables such as converter transformer taps, trigger angles and direct currents; and solving the optimal operating voltage of the direct-current power transmission system by using a search method. The invention provides an extra-high voltage direct-current power transmission system operation voltage optimization method which takes reduction of tapping action times of a converter transformer and reserved generator set spinning reserve capacity for keeping transient voltage of a direct-current receiving-end power grid stable as a core, and the tapping action times of the converter transformer of a direct-current system are effectively reduced. Meanwhile, the transient voltage stability level of the direct-current receiving-end power grid is improved, the power supply capacity of the receiving-end power grid in the load peak period is improved,and the engineering application value is good.

Description

technical field [0001] The invention relates to the technical field of operation control of an UHV direct current transmission system, in particular to an operation voltage optimization method of an UHV direct current transmission system. Background technique [0002] With the continuous improvement of the transmission capacity of the UHV DC transmission system, the DC system participates in the peak regulation of the receiving power grid more and more frequently. During the peak and trough periods of daily load, the change of DC transmission power increases continuously, which leads to the increase of tap action times and losses of the converter transformer, and reduces the service life of the equipment. At the same time, the transmission power of the UHVDC transmission system has increased significantly, leading to increasingly serious problems of voltage stability and insufficient dynamic reactive power support of the DC receiving end grid. In order to maintain the trans...

Claims

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Application Information

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IPC IPC(8): H02J3/36H02J3/46
CPCH02J3/36H02J3/466H02J2203/20Y02E60/60
Inventor 崔挺呙虎左剑王玎胡臻孙杰懿柳永妍
Owner STATE GRID HUNAN ELECTRIC POWER
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