Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Design method of wide-area time-delay pid damping controller for power system

A damping controller, power system technology, applied in system integration technology, information technology support system, reducing/preventing power oscillation, etc., can solve the problems of PID controller parameter tuning more difficult, complicated parameter tuning method, etc.

Active Publication Date: 2017-07-25
ZHEJIANG UNIV OF TECH
View PDF5 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The structure and algorithm of the PID controller are simple and widely used, but the parameter tuning method is complicated. If the influence of time lag is to be considered, the parameter tuning of the PID controller will be even more difficult.

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
  • Design method of wide-area time-delay pid damping controller for power system
  • Design method of wide-area time-delay pid damping controller for power system
  • Design method of wide-area time-delay pid damping controller for power system

Examples

Experimental program
Comparison scheme
Effect test

Embodiment example

[0068] Implementation case: Simulation analysis of power system with four machines and two areas

[0069] Such as Figure 4 In the four-machine two-area power system shown, generators G1 and G2 are located in area 1, and generators G3 and G4 are located in area 2. The two areas are interconnected by a long tie line, and area 1 transmits active power to area 2 through the long tie line. Through the analysis of the small disturbance stable characteristic root, it can be seen that there are three low-frequency oscillation modes in the system, as shown in Table 1. Mode 1 is an interval low-frequency oscillation mode, and G1 and G2 in area 1 have low-frequency power relative to G3 and G4 in area 2. Oscillation, the oscillation frequency is 0.5389Hz, and the damping value is 0.0099. Because the damping value is very small, once the system is disturbed, it will oscillate violently for a long time, and the power oscillation curve of the tie line is as follows Figure 5 shown.

[00...

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 provides a wide-area time-lag PID damping controller design method of an electric system, and belongs to the field of electric system stabilization control technology. The complete design method is provided in order to solve a problem of low frequency oscillation occurring in the interconnection process of a regional power grid of a wide-area electric system. The design method comprises steps of determining the low frequency oscillation mode of the electric system; selecting a feedback control signal representing the low frequency oscillation characteristic and a proper damping control executer; establishing a transfer function mathematical model of the wide-area electric system; designing an electric system PID controller suitable for feedback control of time-lag PWM signals; and calculating a possible PID parameter distribution range which is capable of ensuring stability of the electric system and selecting a proper PID parameter therefrom. According to the invention, the problem of low frequency oscillation in area of the wide-area electric system is can be solved and the design method is applicable when there are time lags in a wide-area feedback PWM signal. The designed controller has a simple structure and easy to achieve in projects.

Description

[0001] Technical field: [0002] The invention relates to a design method of a time-delay PID damping controller in a power system, and belongs to the technical field of power system stability control. [0003] Background technique: [0004] With the interconnection of regional power grids, the scale of the power system continues to expand, and the problem of low-frequency oscillation is becoming more and more serious. How to ensure that the power system under the UHV interconnection of the large regional power grid has a high damping coefficient has become an urgent control problem to be solved for the safe and stable operation of the modern power system. [0005] Due to the interconnection of large regional power grids, the low-frequency oscillations may involve multiple regional power grids at the same time, and the distribution is very wide and the impact is also great. Traditional power system stability controllers (PSS) that use local signals as feedback signals are limi...

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): H02J3/24
CPCY02E40/70Y02E60/00Y04S10/00Y04S10/22
Inventor 戚军欧林林张有兵洪学劲峰
Owner ZHEJIANG UNIV OF TECH
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

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

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com