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A Method for Optimizing Operating Voltage of UHVDC Transmission System

A technology of UHV DC and power transmission system, which is applied in the direction of AC network circuits, circuit devices, electrical components, etc., to achieve good promotion and application value, reduce the number of tap actions, and optimize the effect of operating voltage

Active Publication Date: 2022-02-15
STATE GRID HUNAN ELECTRIC POWER +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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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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  • A Method for Optimizing Operating Voltage of UHVDC 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 a method for optimizing the operating voltage of an UHV DC transmission system, comprising: establishing an optimization model of the operating voltage of the UHV DC transmission system, based on the operating voltage of the UHV DC transmission system and the taps of the converter transformer, the trigger angle and The mathematical relationship of variables such as DC current, using the search method to obtain the optimal operating voltage of the DC transmission system. The present invention proposes a UHVDC transmission system operation voltage optimization method centered on reducing the number of tap actions of the converter transformer and the rotating reserve capacity of the generator set reserved for maintaining the transient voltage stability of the DC receiving end grid, effectively reducing the DC The number of times the taps of the system's converter transformer is activated, and at the same time, the transient voltage stability level of the DC receiving-end power grid is improved, and the power supply capacity of the receiving-end power grid during peak load periods is improved, which has good engineering application value.

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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Patent Type & Authority Patents(China)
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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