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AC Filter Cutting Method for DC Rectifier Station

A technology of AC filter and rectifier station, applied in AC network to reduce harmonic/ripple, harmonic reduction device, etc., can solve problems such as damage to DC transmission system

Active Publication Date: 2019-09-27
ELECTRIC POWER RESEARCH INSTITUTE, CHINA SOUTHERN POWER GRID CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Based on this, it is necessary to provide a method for removing the AC filter of the DC rectification station in view of the problem that harmonic overvoltages will occur in the traditional way of removing the AC filter in the DC rectification station and cause damage to the DC transmission system

Method used

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  • AC Filter Cutting Method for DC Rectifier Station
  • AC Filter Cutting Method for DC Rectifier Station
  • AC Filter Cutting Method for DC Rectifier Station

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Embodiment Construction

[0016] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, and do not limit the protection scope of the present invention.

[0017] see figure 1 As shown in FIG. 1 , it is a schematic flowchart of a method for removing an AC filter of a DC rectifier station according to an embodiment of the present invention. The method for removing the AC filter of the DC rectifier station in this embodiment includes the following steps:

[0018] Step S101: receiving the first working condition signal, the second working condition state signal and the third working condition state signal of the DC bipolar DC rectifier station;

[0019] In this step, the DC bipolar includes the first DC pole and the second D...

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Abstract

The invention relates to an AC filter cut-off method of a DC rectifier station. The method includes a first working condition state signal, a second working condition state signal and a third working condition state signal of the DC bipolar of the DC rectifier station; acquiring different cut-off instruction signals according to different working condition state signals, calculating the different cut-off instruction signals to obtain the target signal for cutting off the AC filter of the DC rectifier station, thereby realizing the cutting off of the AC filter of the DC filter station. In this scheme, when the DC bipolar of the DC rectifier station is in different working conditions, the different cut-off instruction signals can be generated, the time sequence of the cut-off instruction signals is corresponding to the different working conditions, and the time sequence of the final target signal is also corresponding to the working conditions, the target signal is used to cut off the AC filter of the DC rectifier station, the problem of harmonic overvoltage caused by improper AC filter cut-off time sequence under the different work conditions can be prevented, and the equipment safety of a DC power transmission system can be effectively guaranteed.

Description

technical field [0001] The invention relates to the technical field of direct current transmission, in particular to a method for removing an alternating current filter of a direct current rectification station. Background technique [0002] In the DC transmission system, the DC rectifier station is generally arranged to operate in an island mode. Due to the electrical weakness of the island system, the problem of power frequency overvoltage will occur after a DC bipolar blocking fault occurs. [0003] In order to reduce the level and duration of power frequency overvoltage, the measure of quickly cutting off all AC filters after bipolar blocking is implemented in the DC station control system. Generally, all AC filters are cut off directly after the bipolar blocking command is executed. , but in the actual island mode operation, DC bipolar blocking under different working conditions may cause the AC filter to be cut off before the DC current drops to zero, resulting in harm...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02J3/01
CPCH02J3/01Y02E40/40
Inventor 朱益华黄立滨郭琦
Owner ELECTRIC POWER RESEARCH INSTITUTE, CHINA SOUTHERN POWER GRID CO LTD
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