Unlock instant, AI-driven research and patent intelligence for your innovation.

An Optimal Control Method of Sectional Power Flow Based on n-1 Static Safety Constraints

A cross-section flow optimization control technology, which is applied to AC networks with the same frequency from different sources, AC network circuits, single-network parallel feeding arrangements, etc., can solve the cross-section flow without considering the load distribution change of the receiving end network on the transmission section Influence, inability to realize large-scale directional control of cross-section power flow, complex power flow tracking calculations, etc., to achieve the effect of improving the adjustment effect, fast calculation speed, and good adjustment effect

Active Publication Date: 2022-02-11
GUANGDONG UNIV OF TECH
View PDF5 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Based on the sensitivity analysis method, it is impossible to achieve large-scale directional control of the section power flow. The variance-based sensitivity method analyzes the influence degree of the output of the generator set on the balance of the transmission section, and adjusts the output of the generator set to improve the full load of the line. However, it does not Considering the influence of the load of the transmission section receiving end network and its distribution changes on the section power flow
The control method based on power flow tracing is to carry out power flow tracing on the branches of the section to determine the generator control nodes and the corresponding power generation adjustments, but the calculation of power flow tracing is complicated, and this method only controls the total flow of the section, which cannot meet the requirements of each branch in the section. Different goals for changing tides
Flexible alternating current transmission system (FACTS) equipment can effectively control the cross-section power flow, but it is expensive, and it is impossible to install FACTS equipment on all sections

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
  • An Optimal Control Method of Sectional Power Flow Based on n-1 Static Safety Constraints
  • An Optimal Control Method of Sectional Power Flow Based on n-1 Static Safety Constraints
  • An Optimal Control Method of Sectional Power Flow Based on n-1 Static Safety Constraints

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0057] An optimal control method for section power flow based on N-1 static security constraints, please refer to figure 1 , including the following steps:

[0058] S1: Collect the operation data of the power grid in a certain area for power flow calculation;

[0059] S2: On the basis of power flow calculation, calculate the variance sensitivity of each generator set to the power flow section respectively, and according to the variance sensitivity dσ of the generator set 2 / dP gk The absolute value of to select the generating set with the largest variance sensitivity;

[0060]S3: Define the calculation parameters of the genetic algorithm, the number of iterations, and randomly generate the variable population of [generator unit output, load shedding];

[0061] S4: Update the operation mode of the transmission section, even if a certain line of the section is out of operation, calculate the power flow under the N-1 operation mode;

[0062] S5: Use the GAGenAdjust function i...

Embodiment 2

[0101] like figure 2 , the number of power grid nodes in a certain area is 31, of which 1, 2, 3, 4, and 31 are generator sets, and the power flow section is 6 transmission branches, which are 3 branches of nodes 7-5 and three branches of nodes 9-6 branch road. The 7-5 branch is three parallel transmission lines. In the early stage of power grid planning, the 7-5 branch has only two lines. Later, due to the power supply demand, an additional line is added, so the parameters of the later installed line are different from those of the previous two lines. In actual operation, the transmission power of the three transmission lines is different, and it is easy to overload a certain line or two lines, so the power flow control is carried out on this section.

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 cross-section power flow optimization control method based on N-1 static safety constraints, using genetic algorithm to optimize and solve, and comprehensively considering the influence of power generation unit output, receiving end load and load distribution on the cross-section power flow in the power transmission section , and strive to obtain the maximum utilization rate of the line under the condition that the power flow of the section is not overloaded, so as to minimize the amount of load shedding. In the N-1 operation mode of the transmission section, the system dispatcher can safely control the power flow of the section through the output of the generator set and the load shedding scheme obtained, so as to improve the balance of the power flow of the section and the stability of the power system.

Description

technical field [0001] The present invention relates to the field of power system power flow optimization, and more specifically, relates to a section power flow optimization control method based on N-1 static safety constraints. Background technique [0002] At present, there are mainly control methods based on sensitivity analysis, control methods based on power flow tracking, and the use of flexible AC transmission equipment (FACTS). Based on the sensitivity analysis method, it is impossible to achieve large-scale directional control of the section power flow. The variance-based sensitivity method analyzes the influence degree of the output of the generator set on the balance of the transmission section, and adjusts the output of the generator set to improve the full load of the line. However, it does not Consider the impact of the load of the transmission section receiving end network and its distribution on the section power flow. The control method based on power flow...

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): H02J3/06H02J3/46
CPCH02J3/06H02J3/46H02J2203/20
Inventor 贺小平王星华鲁迪黄梓晴
Owner GUANGDONG UNIV OF TECH