Optimized generator tripping capacity acquisition method for suppressing high-frequency problem of sending-end power grid

A technology of cutting machine capacity and acquisition method, applied in electrical components, circuit devices, AC network circuits, etc., can solve problems such as the incompatibility of the stable control cutting machine method, and achieve the effect of good frequency adaptability

Active Publication Date: 2020-08-11
STATE GRID SICHUAN ECONOMIC RES INST
View PDF7 Cites 5 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In order to solve the inadaptability of the existing methods for steady control and cut-off, the present invention proposes a multi-DC async

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
  • Optimized generator tripping capacity acquisition method for suppressing high-frequency problem of sending-end power grid
  • Optimized generator tripping capacity acquisition method for suppressing high-frequency problem of sending-end power grid
  • Optimized generator tripping capacity acquisition method for suppressing high-frequency problem of sending-end power grid

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0112] like figure 1 As shown, using a method for obtaining an optimal cut-off capacity for suppressing the high-frequency problem of the sending-end power grid provided by the present invention, 1. A method for obtaining an optimal cut-off capacity for suppressing the high-frequency problem of the sending-end power grid is characterized in that it includes the following step:

[0113] T1. Collect the initial data of the power grid at the sending end under normal conditions;

[0114] T2. Under the impact of a large-capacity DC blocking accident, collect the fault data of the power grid at the sending end;

[0115] T3. After preprocessing the collected initial data of the sending-end power grid and the fault data of the sending-end power grid under the impact of a large-capacity DC blocking accident, the penalty factor for each power supply cut-off inside the sending-end power grid is obtained;

[0116] T4. Bring the pre-processed power cut-off penalty factors in the power gr...

Embodiment 2

[0126] like figure 2 As shown, the construction method of the multi-DC asynchronous external transmission network cut-off capacity optimization model that shows the consideration of the system frequency stability requirements specifically includes the following steps:

[0127] S1. Collect the frequency data of the sending power grid under the impact of large-capacity DC blocking historical accidents and the effect data after the implementation of the corresponding high-frequency problem suppression strategy;

[0128] S2. According to the effect data after the implementation of the high-frequency problem suppression strategy, introduce the cut-off penalty factor of each unit to construct the objective function, that is, the objective function of minimizing the cut-off capacity of the sending end system under the anticipated accident of large-capacity DC blocking;

[0129] S3. According to the actual power grid operation requirements, construct the conventional operation constr...

Embodiment 3

[0146] The GAMS software is used to call the CPLEX solver to realize the solution of the multi-DC sending end power grid cut-off capacity optimization model. In order to simulate the frequency trajectory of the power grid at the sending end under DC blocking faults, a system frequency response model is built on the MATLAB / Simulink platform for frequency dynamic analysis and comparison of the effect of the machine cut method.

[0147] In order to verify the effectiveness of the method obtained by the cut-off optimization model proposed by the present invention when dealing with DC blocking faults, the improved IEEE RTS-79 test system is used to carry out simulation calculations. The simulation system is connected to the receiving grid through three DC lines (HVDC1, HVDC2 and HVDC3, with rated capacities of 1000MW, 1100MW and 1400MW respectively), the total load in the grid is 1070MW, and the total scale of the three DC transmission lines is 3500MW, which is a typical transmissio...

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 an optimized generator tripping capacity acquisition method for suppressing a high-frequency problem of a sending-end power grid. The method comprises the steps of firstly analyzing a sending-end power grid high-frequency problem and a related suppression strategy under a high-capacity direct-current blocking accident; and then constructing a power grid generator tripping capacity optimization model, calculating generator tripping penalty factors of each power supply in the sending-end power grid, and finally substituting the generator tripping penalty factors into thepower grid generator tripping capacity optimization model considering the system frequency stability requirement to solve to obtain the sending-end power grid generator tripping optimization mode andthe corresponding generator tripping capacity under the direct-current blocking accident. According to the scheme, the global power supply of the sending-end power grid is brought into a removal alternative, the difference of generator tripping effects among different types of power supplies is considered, and the removal effects of different regions and different parameter performance units are quantitatively quantified through generator tripping penalty factors; the related suppression strategy of the high-frequency problem of the sending-end power grid under the impact of the large-capacitydirect-current locking anticipated accident is coordinated and optimized, the active surplus in the sending-end power grid is remarkably reduced, the total generator tripping capacity is kept withina reasonable range, and undertripping and overtripping phenomena are effectively avoided.

Description

technical field [0001] The invention relates to the technical field of power system dispatching operation, in particular to a method for obtaining optimal cut-off capacity for suppressing the high-frequency problem of the power grid at the sending end. Background technique [0002] UHV DC transmission has the characteristics of large capacity and high efficiency, and has significant advantages in long-distance large-capacity transmission and asynchronous interconnection of AC power grids. However, while promoting the cross-regional consumption of clean energy and the optimal allocation of resources on a large scale, the blocking faults of large-capacity DC transmission lines, especially bipolar blocking, will lead to a huge power surplus in the multi-DC asynchronous transmission grid. In addition, under the background of asynchronous interconnection and rising penetration rate of new energy, the inertial response and frequency regulation ability of the sending power grid hav...

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): H02J3/24H02J3/06
CPCH02J3/241H02J3/06H02J2203/10H02J2203/20H02J2300/40H02J2300/20H02J2300/28
Inventor 王云玲苏韵掣李奥刘方杨新婷雷云凯苟竞唐权胥威汀李婷
Owner STATE GRID SICHUAN ECONOMIC RES INST
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