Online learning optimization design method for photovoltaic water pump system rotation speed adjustor

A speed regulator, photovoltaic water pump technology, applied in control systems, vector control systems, control electromechanical brakes, etc., can solve the problems of difficult selection of voltage regulator parameters, high requirements for system control performance, and difficult accurate estimation of measurement methods , to achieve the effects of improving safety and reliability, simple calculation, and simple control strategy

Inactive Publication Date: 2015-10-07
HEFEI UNIV OF TECH
View PDF5 Cites 1 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the array voltage stability of this method is poor, and the parameters of the voltage regulator are difficult to optimize
2) Torque current limitation, because the load torque of the water pump is proportional to the square of the speed, limiting the torque current limits the speed
How to obtain the load torque value under load is very important. The load torque of the water p

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
  • Online learning optimization design method for photovoltaic water pump system rotation speed adjustor
  • Online learning optimization design method for photovoltaic water pump system rotation speed adjustor
  • Online learning optimization design method for photovoltaic water pump system rotation speed adjustor

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0023] Hereinafter, the present invention will be further described in detail based on the drawings and embodiments.

[0024] An online learning optimization design method for a speed regulator of a photovoltaic water pump system includes the following steps:

[0025] (1) The control mode of the photovoltaic water pump system of the present invention is a position sensorless vector control mode. The inner loop of the control system is a torque loop and a magnetic link loop, while the outer loop uses a parallel connection of a DC voltage loop and a speed limiting loop. The sum of its output is used as the given torque current i q * . Such as figure 1 As shown, when the photovoltaic water pump system runs below the rated power, the speed regulator does not work, its output is 0, only the voltage regulator plays the role of maximum power point stabilization; when the maximum output power of the photovoltaic array is greater than the rated power of the pump motor At this time, stop se...

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 online learning optimization design method for a photovoltaic water pump system rotation speed adjustor. The method has the beneficial effects that on the basis of a vector control mode of a position sensorless, an outer ring control strategy with a rotation speed amplitude limiting ring and a DC voltage ring in parallel is adopted, when the maximal output power of an array is larger than rated pump power, the rotation speed amplitude limiting ring works, the rotation speed of the motor is stabilized at a rated rotation speed, the motor can thus be ensured not to exceed the speed, and safety and reliability of the system are improved; a simple VF open ring control mode is adopted for measuring torque of a water pump load, the rotation speed of the water pump is changed through changing the given frequency so as to calculate a load torque corresponding to each rotation speed, and the water pump load features are drawn in a secondary curve mode; rotational inertia of the system is measured in an online mode in a load state, no-load operation of the water pump is not needed, the rotational inertia can be conveniently measured even in the load condition, a mode of calculating a mean value through multiple times of measurement is adopted, the measurement result is more accurate.

Description

technical field [0001] The invention relates to an online learning optimization design method for a speed regulator of a photovoltaic water pump system, and belongs to the technical field of photovoltaic water pump inverters. Background technique [0002] Photovoltaic water pump inverters use the energy of photovoltaic arrays to drive photovoltaic water pumps to extract water from deep wells, rivers, rivers, lakes, ponds and other water sources. The speed of the water pump in the photovoltaic water pump system must be limited below the rated speed to ensure that the water pump and the motor will not be overloaded. When the maximum output power of the photovoltaic array is greater than the rated power of the water pump motor, the inverter of the water pump motor must enter the power limiting state to limit the power of the motor to run at the rated power. Generally, there are three methods: 1) Frequency limiting, which can be used for In the VVVF stabilized voltage working m...

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): H02P21/14
Inventor 苏建徽程文汪海宁赖纪东王建国
Owner HEFEI UNIV OF TECH
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