Starting method of high voltage direct current transmission system

A technology of a power transmission system and a starting method, which is applied in the direction of power transmission and AC network, etc., can solve the problems of increased reactive power loss, limited DC voltage adjustment range, limited frequency modulation capability, etc.

Active Publication Date: 2013-09-18
NR ELECTRIC CO LTD +1
View PDF4 Cites 14 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

When the inter-station communication fails, the frequency measurement value on the inverter side cannot be sent to the rectifier side. If the DC voltage frequency modulation on the inverter side is adjusted,

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Starting method of high voltage direct current transmission system
  • Starting method of high voltage direct current transmission system
  • Starting method of high voltage direct current transmission system

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0025] The technical solutions of the present invention will be described in detail below in conjunction with the accompanying drawings.

[0026] The present invention provides a starting method of a high-voltage direct current transmission system, which is suitable for the situation where the communication between one pole station fails and the frequency control function is started. The starting method includes the following steps:

[0027] (1) Before starting, when the inter-station communication fails and the "frequency control" option is enabled, set the current command on the rectification side to 1.0pu, and cancel the voltage reference value compensation of the constant voltage controller on the rectification side at the same time. Increase the voltage reference value compensation on the side, and set the voltage reference value on both sides according to the operation needs of the DC system;

[0028] (2) Unlock the inverter side first. After the inverter side is unlocke...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

No PUM Login to view more

Abstract

The invention discloses a starting method of a high-voltage direct current transmission system. If the communication between stations fails and a frequency control function operates, a current instruction at a rectifier side is set to be 1.0pu, and meanwhile, the voltage reference value compensation of a constant voltage controller at the rectifier side is cancelled, the voltage reference value compensation is added at an inverter side, and voltage reference values at two sides are set; the inverter side is unlocked, and the inverter side is forced to work in a constant extinction angle control mode; the rectifier side is manually unlocked, a shift phase command is released after the rectifier side is unlocked, and the constant voltage controller at the rectifier side operates when the output of a constant current controller at the rectifier side drops to be equal to the output of the constant voltage controller; the direct current voltage at the inverter side is detected, and the current margin is compensated; and the inverter side enters a constant current control mode, the current is controlled at the minimum operating current, and then the starting process is finished. Through the starting method, the controllers at the two sides can be coordinated to work under the condition that the communication between stations fails, and the constant voltage control at the rectifier side and the constant current/power control at the inverter side after starting are realized.

Description

technical field [0001] The invention belongs to the fields of high-voltage direct current transmission and ultra-high voltage direct current transmission, and in particular relates to a starting method of a high-voltage direct current transmission system. Background technique [0002] The HVDC power transmission system includes a rectifier station and an inverter station. Starting means that the inverter side and the rectifier side of the same pole are unlocked respectively, and the power flow between the two stations is established. In the process of starting and stopping the pole, the unlocking and locking status of the two stations are communicated to each other through the communication channel between the stations, so that the sequence of unlocking and locking of the two stations is guaranteed in these processes. When the inter-station communication fails, the personnel of the two stations contact by telephone to coordinate the unlocking and locking sequence of the two ...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
IPC IPC(8): H02J3/36
CPCY02E60/60
Inventor 李林王永平赵文强
Owner NR ELECTRIC CO LTD
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap