A method for determining the transient stability of a power system

A transient stability, power system technology, applied in electrical components, circuit devices, AC network circuits, etc., can solve problems such as insufficient consideration of the impact of load stability on the dynamic characteristics of power system loads

Inactive Publication Date: 2017-11-28
TSINGHUA UNIV +3
View PDF2 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The existing power system stability analysis is mainly offline static analysis, which does not fully consider the dynamic characteristics of the power system load and its impact on load stability.

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
  • A method for determining the transient stability of a power system
  • A method for determining the transient stability of a power system
  • A method for determining the transient stability of a power system

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0056] The power system transient stability judgment method proposed by the present invention comprises the following steps:

[0057] (1) Simplify the comprehensive load model of the power system into the following form:

[0058]

[0059] Among them, P com and Q com are the active power and reactive power in the comprehensive load model of the power system, P com_m0 and Q com_m0 Respectively, the active power and reactive power of the induction motor part, the resistance R com and reactance X com is the static part in the integrated load model, the resistor R com and reactance X com in series with each other, as X S , X R and x M Respectively, the stator reactance, rotor reactance and excitation reactance of the induction motor part of the comprehensive load model; P 0 and Q 0 are the active power and reactive power in the simplified model of integrated load, respectively, P m0 and Q m0 Respectively, the active power and reactive power of the induction motor in...

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 method for judging the transient stability of a power system, belonging to the technical field of power system stability analysis and monitoring. The method of the invention deeply analyzes the dynamic process of the power system, uses a suitable method to describe the transient process of the power system in a fault, and provides a method for judging the load stability of the power system. Firstly, the state equation of the induction motor is analyzed, combined with the measurement characteristics of the power system, a simplified model of the induction motor is proposed, which completely and effectively describes the dynamic characteristics of the induction motor model, and the parameters of the online comprehensive load model are identified for the simplified model, using the Lyapunov method Based on the analysis of the state change of the integrated load model in the power system fault process, the relevant criteria of the limit cut-off time and the load instability of the power system are given. The method can quickly realize the parameter identification and stability judgment of the comprehensive load model of the power system, while ensuring high accuracy and reliability, and meeting the requirements of online applications.

Description

technical field [0001] The invention relates to a method for judging the transient stability of a power system, belonging to the technical field of power system stability analysis and monitoring. Background technique [0002] The load is an important part of the power system, and the load has an important impact on the stability of the power system. With the continuous expansion of the grid scale and the continuous increase of large power loads, problems directly related to loads such as transient voltage stability have become increasingly prominent. However, there is currently a lack of reliable and effective load models and parameters in power grid analysis and calculation. In practical applications, there is no effective basis and scientific methods for judging transient voltage stability. Especially in online application scenarios, there is no reasonable solution to related problems. [0003] The dynamic and static integrated load model is a load model widely used in po...

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 & AuthorityPatents(China)
IPC IPC(8): H02J3/00H02J13/00
Inventor于松泰张树卿才洪全华科于之虹严剑锋
OwnerTSINGHUA UNIV