A Coordinated Control Method of Static Synchronous Compensator and Capacitor Bank in Station

A static synchronous compensation and coordinated control technology, applied in the direction of reactive power adjustment/elimination/compensation, flexible AC transmission system, etc., can solve the problem of not being able to use the dynamic reactive power of static synchronous compensators, etc., to achieve clear physical meaning and improve Stability, achieve simple effect

Active Publication Date: 2017-03-08
POWER DISPATCHING CONTROL CENT OF GUANGDONG POWER GRID CO LTD +1
View PDF2 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

When the system voltage fluctuates, if there is no coordinated control between the static synchronous compensator (STATCOM) and the capacitor bank in the station, the static synchronous compensator (STATCOM) will output a large amount of dynamic reactive power or even output rated dynamic reactive power while the fixed capacitor bank will not In this case, the static synchronous compensator (STATCOM) cannot play the role of storing a large amount of dynamic reactive power to deal with transient faults

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

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0028] The method for coordinated control of the static synchronous compensator and the capacitor in the substation proposed by the present invention includes the following steps:

[0029] (1) At the arrival of each control cycle, detect the effective value V of the voltage at the point where the static synchronous compensator is connected to the grid line , to calculate the unit value V of the effective value of the voltage pcc :V pcc =V line / V base , where V base is the voltage base value of the power grid, according to the per unit value V pcc , to control the output reactive power of the static synchronous compensator as follows:

[0030] If V pcc ≤V th1 , then the static synchronous compensator is blocked, and this control cycle ends; where pu is the unit of voltage per unit.

[0031] If V th1 pcc ≤V th2 , then the static synchronous compensator enters the transient voltage control mode, and the output reactive power is the capacitive rated reactive power value...

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 coordinative control method for a static synchronous compensator and an in-station capacitor bank, and belongs to the technical field of power grid stability control of power systems. According to the method, when the bus voltage deviation rated value of an access point is smaller than 10% and the STATCOM runs in a steady-state voltage control mode, the STATCOM and the in-station capacitor bank are coordinatively controlled. The reactive response speed difference of the STATCOM and capacitors are considered; and during steady-state voltage control, the capacitor bank outputs reactive power as far as possible, and maximum dynamic reactive standby capacity is achieved by replacement to meet transient voltage stability control demands of transient faults of a power grid. The method has the characteristics of clear physical significance, simplicity for realization, excellent performance and the like; and when the method is applied to system power stability control and dynamic reactive power storage, the system voltage can be effectively kept in a reasonable range, and the system keeps the storage of a large amount of dynamic reactive power, so that the transient voltage stability of the power grid is effectively improved.

Description

technical field [0001] The invention relates to a method for coordinated control of a static synchronous compensator and a capacitor bank in a station, in particular to a control method for a static var compensator and a capacitor bank in a station under different voltage levels of a power grid, and belongs to the technical field of power grid stability control of a power system . Background technique [0002] The static var compensator (STATCOM) with turn-off devices (IGBT, IGCT) as switching devices is a typical application of modern power electronics technology in power systems, which can help the grid to achieve dynamic reactive power continuous regulation and improve grid voltage stability. , Suppressing the low-frequency power oscillation of the line is one of the main means to realize the controllability and intelligence of the power grid. [0003] When the system has a sudden load increase, short circuit and other factors that cause voltage fluctuations, the system ...

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 Patents(China)
IPC IPC(8): H02J3/18
CPCY02E40/10
Inventor 杨银国袁志昌林建熙汪龙龙辛拓刘俊磊钱峰陈睿谭伟罗钢
Owner POWER DISPATCHING CONTROL CENT OF GUANGDONG POWER GRID 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