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

Simplified method and system of pwm-based direct-drive fan

A fan system and system simplification technology, applied in control systems, vector control systems, control generators, etc., can solve problems such as low simulation efficiency, achieve the effects of simplifying fan systems, ensuring effectiveness, and improving reliability and stability

Active Publication Date: 2020-04-17
ELECTRIC POWER RESEARCH INSTITUTE OF STATE GRID NINGXIA ELECTRIC POWER COMPANY +1
View PDF4 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In view of this, an object of the present invention is to propose a simplified method of a PWM-based direct-drive fan system to solve the problem of low simulation efficiency in the prior art

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
  • Simplified method and system of pwm-based direct-drive fan
  • Simplified method and system of pwm-based direct-drive fan
  • Simplified method and system of pwm-based direct-drive fan

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0044] The following description and drawings fully illustrate specific embodiments of the present invention to enable those skilled in the art to practice them. Other implementations may include structural, logical, electrical, process, and other changes. The examples only represent possible changes. Unless explicitly required, individual components and functions are optional, and the order of operations can be changed. Parts and features of some embodiments may be included in or substituted for parts and features of other embodiments. The scope of the embodiments of the present invention includes the entire scope of the claims, and all available equivalents of the claims. In this context, these embodiments of the present invention may be individually or collectively denoted by the term "invention", this is only for convenience, and if more than one invention is actually disclosed, it is not intended to automatically limit the application The scope is any single invention o...

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 simplified method and system based on PWM (Pulse-Width Modulation) for a direct-drive fan. The simplified method comprises the following steps: recognizing constituent partsin an original model of a direct-drive fan system; and forming a simplified system model through replacing and simulating the machine side converter in the original model by a machine side controlledvoltage source and a machine side controlled current source, replacing and simulating the network side converter in the original model by a network side controlled voltage source and a network side controlled current source, and adding a direct current unloading protection circuit for the direct current bus in the original mode. The method provided by the invention simulates the machine side converter and the network side converter by using the machine side controlled source and the network side controlled source to greatly simplify the fan system and improve the system simulation verificationefficiency, maintains the direct bus in the system model to effectively reduce the possible instantaneous states such as overvoltage and over-current in the actual operating process and guarantee theeffectiveness of the system model, and provides the direct current unloading protection circuit to improve the reliability and stability of the system model.

Description

Technical field [0001] The invention belongs to the technical field of wind power systems, and in particular relates to a simplified method and system for a direct-drive fan based on PWM. Background technique [0002] At present, direct-drive wind turbines have been widely used in the field of new energy power generation, and studying its electromagnetic transient characteristics is of great significance to ensure the stability of the power system. The simulation speed of electromagnetic transient simulation software mainly depends on the following two factors: the number of model nodes and the simulation calculation step length. The number of model nodes depends on the number of components and control loop control devices in the main loop, and the simulation calculation step size depends on the model simulation accuracy requirements. [0003] The existing centralized connected wind farms generally consist of hundreds of wind turbines. If each wind turbine is modeled by a detailed...

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): H02P21/00H02P27/08
CPCH02P21/0003H02P27/085
Inventor 张迪袁赛军摆存曦刘腾飞赵晓东郝治国李旭涛
Owner ELECTRIC POWER RESEARCH INSTITUTE OF STATE GRID NINGXIA ELECTRIC POWER COMPANY