Power grid voltage control method for reducing near-zone voltage fluctuation of extra-high-voltage direct-current converter station

A UHV DC, grid voltage technology, applied in the direction of AC network voltage adjustment, AC network circuit, power transmission AC network, etc., can solve problems affecting the stable operation of nearby power grids

Active Publication Date: 2020-03-27
STATE GRID XINJIANG ELECTRIC POWER CORP +2
View PDF10 Cites 8 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, if the basic voltage of the converter station is at a high or low level when the active power transmission is adjusted, the voltage fluctuations caused by the switching of the filter / compensation capacitor during the active power adjustment process may cause The voltage exceeds the planned limit and affects the stable operation of the nearby power grid

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
  • Power grid voltage control method for reducing near-zone voltage fluctuation of extra-high-voltage direct-current converter station
  • Power grid voltage control method for reducing near-zone voltage fluctuation of extra-high-voltage direct-current converter station
  • Power grid voltage control method for reducing near-zone voltage fluctuation of extra-high-voltage direct-current converter station

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0047] The grid voltage control method proposed by the present invention to reduce the voltage fluctuation in the vicinity of the UHVDC converter station, its flow is as follows figure 2 shown, including the following steps:

[0048] (1) Obtain the network structure data of the power grid from the power grid dispatching center, and set the UHV DC near area to include I bus bars, J sets of commutator poles currently in operation, and L sets of high-voltage filter / compensation capacitors; the structure is as follows figure 1 shown;

[0049] (2) Record the current control time as t 0 , get the planned active power transmission value S of the UHV DC converter station for the day from the grid dispatching center p,n , n=1,...,N, N is the serial number of the planned value of active power transmitted from the AC side of the UHV DC converter station to the DC side of the UHV DC converter station every day, and v is the time interval for transmitting the planned value , in an embo...

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 relates to a power grid voltage control method for reducing near-zone voltage fluctuation of an extra-high-voltage direct-current converter station, and belongs to the technical field ofautomatic voltage control of power systems. According to the method, when each automatic voltage control period arrives, an extra-high voltage direct-current active power transmission plan is read in, and the voltage value of a near-region power grid of a direct-current converter station in a period of time in the future is simulated and calculated according to the active power transmission plan.Active and reactive adjustment of a converter pole is simulated in the calculation process of adopting a power flow model, and a control system in a converter station automatically switches a high-voltage filter / compensation capacitor in the adjustment process, so that voltage values at all moments in the adjustment process are calculated. According to the method, the voltage safety threshold value of the near-zone power grid bus of the converter station is calculated according to the fluctuation amplitude of the voltage value and is input into an automatic voltage control system to realize prevention and control. According to the method, voltage out-of-limit caused by near-zone power grid voltage fluctuation in the converter station direct-current active power transmission capacity adjusting process can be avoided, and the voltage stability of the extra-high voltage direct-current power grid is improved.

Description

technical field [0001] The invention relates to a power grid voltage control method for reducing voltage fluctuations in the vicinity of an UHV DC converter station, and belongs to the technical field of automatic voltage control of electric power systems. Background technique [0002] Automatic voltage control (hereinafter referred to as AVC, Automatic Voltage Control) system is an important means to achieve safe (improved voltage stability margin), economical (reduced network loss), and high-quality (improved voltage qualification rate) operation of the transmission network. The AVC system architecture is based on the grid energy management system (EMS), which can use the real-time operation data of the transmission network to scientifically make the best reactive power and voltage adjustment plan from the perspective of overall optimization of the transmission network, and automatically send it to power plants, substations and subordinates The power grid dispatching organ...

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
Patent Type & Authority Applications(China)
IPC IPC(8): H02J3/16H02J3/18H02J3/36
CPCH02J3/16H02J3/1864H02J3/36Y02E40/30Y02E60/60
Inventor 张锋宋朋飞汤磊李渝王钰郭小龙刘永锋王衡印欣亢朋朋樊国伟杨桂兴于冰
Owner STATE GRID XINJIANG ELECTRIC POWER CORP
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