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Direct-current voltage control method and device

A technology of DC voltage and control method, applied in the field of electric power, can solve problems such as mechanical wear of taps

Active Publication Date: 2020-10-23
MAINTENANCE BRANCH COMPANY STATE GRID ZHEJIANG ELECTRIC POWER +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In view of this, the present application provides a DC voltage control method and device for solving the problem of excessive mechanical wear of the taps due to frequent actions of the taps

Method used

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  • Direct-current voltage control method and device

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0059] image 3 It is a flow chart of a DC voltage control method according to an embodiment of the present application.

[0060] Such as image 3 As shown, the DC voltage control method provided in this embodiment is applied to the inverter station of the DC transmission system, and specifically includes the following steps:

[0061] S1. Obtain multiple voltage parameters related to the inverter station.

[0062] The voltage parameters here include the measured DC voltage Ud of the inverter station, and also include the difference Uref between the rated DC voltage of the rectifier station of the DC transmission system and the voltage drop of the DC line.

[0063] S2. Calculate corresponding reference voltage parameters according to multiple voltage parameters.

[0064] The reference voltage parameter here refers to the reference DC voltage corresponding to the actual measured DC voltage, and the reference voltage difference corresponding to the difference. The specific ca...

Embodiment 2

[0093] Figure 7 It is a block diagram of a DC voltage control device according to an embodiment of the present application.

[0094] Such as Figure 7 As shown, the DC voltage control device provided in this embodiment is applied to an inverter station of a DC power transmission system, and specifically includes a parameter acquisition module 10 , a parameter calculation module 20 and a first control module 30 .

[0095] The parameter obtaining module is used to obtain multiple voltage parameters related to the inverter station.

[0096] The voltage parameters here include the measured DC voltage Ud of the inverter station, and also include the difference Uref between the rated DC voltage of the rectifier station of the DC transmission system and the voltage drop of the DC line.

[0097] The parameter calculation module is used for calculating corresponding reference voltage parameters according to multiple voltage parameters.

[0098] The reference voltage parameter here ...

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Abstract

The invention discloses a direct-current voltage control method and device, and the method and device are applied to an inverter station of a direct-current power transmission system, and specificallycomprise the steps: obtaining an actually measured direct-current voltage of the inverter station and the difference between a rated direct-current voltage of a rectification station of the direct-current power transmission system and the voltage drop of a direct-current line; respectively calculating the actually measured direct current voltage and the difference value according to the valve group state of the inverter station to obtain a reference direct current voltage corresponding to the actually measured direct current voltage and a reference voltage difference value corresponding to the voltage difference value; and when the inverter station is in a bipolar full-voltage operation state, respectively outputting a tap upshift instruction or a tap downshift instruction based on the reference direct-current voltage, the upshift dead zone value and the downshift dead zone value. According to the technical scheme, the upshift dead zone value of the tap changes along with different direct current operation modes and is different from the downshift dead zone value, experiments find that frequent actions of the tap can be avoided, and therefore the problem that due to the frequent actions of the tap, the tap is excessively abraded mechanically is solved.

Description

technical field [0001] The present application relates to the field of electric power technology, and more specifically, to a DC voltage control method and device. Background technique [0002] As a part of the DC control system, the DC voltage control has the function of maintaining the stable operation of the DC voltage in the steady state and transient state. On the inverter side of the DC transmission system, it is realized by the constant arc extinguishing angle control and the tap voltage control. Among them, The constant arc extinguishing angle control is realized in the trigger angle control module of the valve group control system, and the tap voltage control is realized in the valve group control system or the tap control module of the extreme control system. [0003] The inventors of this application found in practice that using the existing converter tap voltage control technology, the converter station has frequent movements of the converter taps, and the freque...

Claims

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Application Information

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IPC IPC(8): H02J3/36H02J1/00
CPCH02J3/36H02J1/00Y02E60/60
Inventor 盛建兰贾轩涛刘超姚晖王坚俊高子杰钱松林李刚赵轶帆郑飞黄养信宗万里
Owner MAINTENANCE BRANCH COMPANY STATE GRID ZHEJIANG ELECTRIC POWER