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

Speed controller parameter optimization method for suppressing ultralow-frequency oscillation of hydropower generating set based on critical parameter

A hydroelectric unit and optimization method technology, applied in the direction of controlling generators, reducing/preventing power oscillation, electrical components, etc., can solve problems affecting the frequency stability of the power grid, and do not propose a speed governor parameter optimization method, etc., to achieve ultra-low frequency suppression Oscillation, optimized setting, simple operation effect

Active Publication Date: 2017-08-22
YUNNAN POWER GRID
View PDF4 Cites 16 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] However, the above studies did not specifically analyze the impact of the parameters of the governor of the hydroelectric unit on the ultra-low frequency oscillation. Among the two suppression methods for the ultra-low frequency oscillation, adjusting the dead zone is actually to let the hydroelectric unit withdraw from frequency regulation, which will affect the frequency stability of the power grid. The method of adjusting the parameters of the governor mainly relies on experience and exploration, and no theoretical basis for optimizing the parameters of the governor has been proposed.

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
  • Speed controller parameter optimization method for suppressing ultralow-frequency oscillation of hydropower generating set based on critical parameter
  • Speed controller parameter optimization method for suppressing ultralow-frequency oscillation of hydropower generating set based on critical parameter
  • Speed controller parameter optimization method for suppressing ultralow-frequency oscillation of hydropower generating set based on critical parameter

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0023] In order to describe the present invention more specifically, the technical solution of the present invention will be described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0024] This embodiment adopts as figure 1 The structure of the governor shown is explained, which is the PID governor structure commonly used in hydropower units at present. based on figure 1 The governor structure shown can obtain the characteristic equation corresponding to the transfer function of the entire hydroelectric unit as follows:

[0025]

[0026] In formula (1): T 4 =T y ,T 5 =T w ,T 6 =T m , K P ,K I ,K D They are the PID parameters of the governor, R is the adjustment coefficient, y is the opening of the governor, T y (unit s) is the hydraulic system time constant, T w (unit s) is the water hammer effect time constant of the turbine, T m (unit s) is the equivalent inertia time constant of all generator sets in the system....

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 speed controller parameter optimization method for suppressing the ultralow-frequency oscillation of a hydropower generating set based on a critical parameter. The method discovers, based on a characteristic equation expression equation of the hydroelectric generating set, that the reason of the ultralow frequency oscillation is that the speed controller has an over-low ratio of the proportion parameter to the integral parameter. According to a mechanism analysis conclusion, the method comprises three following steps of: (1) setting the integral parameter and the differential parameter of the speed controller; (2) searching the critical proportion parameter of the speed controller; (3) optimizing the proportion parameter of the speed controller. The method can obviously suppress the ultralow-frequency oscillation by optimizing the parameter of the speed controller in the system, and is easy to operate and suitable for software offline simulation.

Description

technical field [0001] The invention belongs to the technical field of power system stability control, and in particular relates to a governor parameter optimization method for suppressing ultra-low frequency oscillation of a hydroelectric unit based on a critical parameter. Background technique [0002] China's hydropower resources rank first in the world. With the continuous increase in the development and utilization of hydropower resources, China has become the country with the largest hydropower installed capacity in the world. Compared with thermal power generation, hydropower is cleaner and more environmentally friendly, which is in line with China's national strategy for sustainable development; compared with other clean energy sources, hydropower has a lower cost and mature related technologies. The construction of large-scale hydropower units is the main form of hydropower development and utilization in my country , It is an inevitable requirement for the developmen...

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): H02J3/24H02J3/38H02P9/06H02P101/10
CPCH02J3/24H02J3/382H02J2203/20H02P9/06H02P2101/10
Inventor 陈义宣李玲芳朱欣春司大军徐政郭相阳王国腾肖亮刑法财
Owner YUNNAN POWER GRID
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