Power-loss ride-through control system and method of electric-driving compressor
A technology of power loss spanning and control system, applied in control system, motor control, AC motor control and other directions, can solve the problems of affecting pipeline gas transmission, hidden dangers, inverter shutdown, etc., to avoid waste of resources and economic losses. Effect
Active Publication Date: 2018-02-16
CHINA PETROLEUM & CHEM CORP +1
View PDF5 Cites 2 Cited by
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
When the above situation occurs, if the DC bus voltage drops below a certain value, it will directly cause the inverter to stop quickly, thereby causing the compressor to stop running, affecting the gas transmission volume of the pipeline, and even causing safety hazards
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 moreImage
Smart Image Click on the blue labels to locate them in the text.
Smart ImageViewing Examples
Examples
Experimental program
Comparison scheme
Effect test
Embodiment Construction
[0017] The principles and features of the present invention are described below in conjunction with the accompanying drawings, and the examples given are only used to explain the present invention, and are not intended to limit the scope of the present invention.
[0018] Such as figure 1 As shown, a power failure ride-through control system for an electric-driven compressor provided in an embodiment of the present invention includes a DC bus, a frequency converter, a voltage sensor and a controller, the DC bus is electrically connected to the frequency converter, and the controller The voltage sensor is electrically connected to the DC bus, the frequency converter is electrically connected to the controller, and the controller is connected to the compressor through a motor.
[0019] The frequency converter is electrically connected to the large asynchronous motor. The frequency converter controls the AC motor by changing the operating power frequency of the motor. The motor d...
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
Login to View More Abstract
The invention relates to a power-loss ride-through control system and method of an electric-driving compressor. The system comprises a DC bus, a frequency converter, a voltage sensor and a controller,wherein the voltage sensor is used for detecting a voltage on the DC bus, the controller is used for controlling the frequency converter to activate kinetic energy buffering process when the voltageon the DC bus is reduced to a first DC bus voltage from an initial voltage and also is used for controlling the frequency converter to activate automatic re-starting process when the voltage on the DCbus is reduced to a second DC bus voltage, and the first DC bus voltage is larger than the second DC bus voltage. With the system provided by the technical scheme of the invention, a motor for driving the compressor and controlled by the frequency converter can be enabled to continuously and stably run until normal power supply of the power grid is restored during the power-loss process when short-time power failure or fault occurs in the power grid, and resource waste and economic loss are prevented.
Description
technical field [0001] The invention relates to the field of power electronics technology, in particular to a power-off ride-through control system and method for an electric-driven compressor. Background technique [0002] Because long-distance natural gas pipelines need to transport natural gas over long distances, it is necessary to arrange large compressors at compressor stations along the line. Usually, the voltage output by the substation is converted into the DC bus voltage of the inverter, so that the inverter outputs a certain frequency to control the operation of the large asynchronous motor to drive the compressor. Since the compressors of long-distance natural gas pipelines need to run continuously and avoid waste of resources and economic losses caused by downtime, the terrain along the long-distance pipelines is complex, the landforms are changeable, and the weather conditions are poor, and most of the compressor stations are located in remote mountainous areas...
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
Login to View More Patent Type & Authority Applications(China)
IPC IPC(8): H02P29/028H02P27/06
CPCH02P27/06H02P29/025H02P29/032
Inventor 卓麟仇寒李祎璞孙勇张建国钟晓峰梁现华郭淼张博曾涛
Owner CHINA PETROLEUM & CHEM CORP