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Grid-connected control system and method for miniature internal combustion engine generator sets

A technology of internal combustion generator sets and generator sets, applied in the direction of single-network parallel feed arrangement, etc., can solve problems such as electric power fluctuations, achieve the effects of reducing grid interference, improving power supply quality, and ensuring rapid adjustment and stability

Pending Publication Date: 2019-03-01
SHANDONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] In order to solve the deficiencies of the prior art, the present disclosure provides a grid-connected control system and control method for a small internal combustion generator set. volatility issues;

Method used

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  • Grid-connected control system and method for miniature internal combustion engine generator sets
  • Grid-connected control system and method for miniature internal combustion engine generator sets

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0047] A small internal combustion generator set grid-connected control system, such as figure 1 As shown, it is a structural diagram of the grid-connected control system of the internal combustion generator set, including: the first voltage transformer, the second voltage transformer, the current transformer, the speed sensor, the speed regulator ASR, the voltage regulator AVR, the grid-connected controller, Power grid, grid-connected switch and generator set;

[0048] The power grid is connected to the generator set through a grid-connected switch;

[0049] The other end of the grid-connected switch is connected to the grid-connected controller;

[0050] The first voltage transformer, the second voltage transformer, the current transformer and the voltage regulator AVR are all connected to the grid-connected controller;

[0051] The other end of the voltage regulator AVR is connected to the generator set; the speed sensor is connected to the grid-connected controller and t...

Embodiment 2

[0076] like figure 2 As shown, it is the control method of the grid-connected controller and the speed regulator of the present application, a control method of the grid-connected control system of a small internal combustion generator set, including the following steps:

[0077] Before grid connection, the grid connection operation signal sent by the grid connection controller to the speed regulator ASR after receiving the grid connection command is 0;

[0078] When the grid-connected operation signal is 0, the grid-connected controller calculates the collected mains voltage and current, the voltage and current of the generator set, and the real-time speed of the generator set through the grid-connected synchronous control algorithm to obtain the given speed value and voltage Set the value, and send the given speed value to the speed regulator ASR, and send the given voltage value to the voltage regulator AVR;

[0079] The voltage regulator AVR collects the voltage of the g...

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Abstract

The invention discloses a grid-connected control system and method for miniature internal combustion engine generator sets. The system comprises a grid-connected controller and a rotation speed regulator ASR, wherein the grid-connected controller is used for carrying out processing of a grid-connected synchronous control algorithm, carrying out processing of an optimum control algorithm after gridconnection, sending a regulation signal obtained via the processing to a voltage regulator AVR and the rotation speed regulator ASR, detecting and comparing whether frequencies, voltage values and voltage phases of a generator set and a mains supply are the same tor not, controlling a grid-connected switch and sending a grid-connected operation signal to the rotation speed regulator ASR; and therotation speed regulator ASR is used for carrying out processing of a traditional rotation speed PID control algorithm on the regulation signal obtained by the grid-connected controller via the processing and the acquired generator rotation speed before grid connection, carrying out processing of a variable gain control algorithm after the grid connection, and using the result obtained via the processing to control a throttle percentage. The system and method are capable of solving the problem that no controllers are designed for switching between grid connection and grid separation in the prior art, and solving the defect that the electric power waves are easy to fluctuate after grid connection.

Description

technical field [0001] The disclosure relates to the technical field of grid-connected control of internal combustion generating sets, and in particular to a grid-connecting control system and control method for small internal combustion generating sets. Background technique [0002] As the world's energy crisis continues to intensify and environmental pollution becomes more and more serious, clean and efficient distributed energy supply systems are more and more widely used. The distributed energy supply system follows the energy supply principle of "energy matching and cascade utilization", and is closer to the user side, providing flexible, energy-saving and comprehensive energy services for end users. is of great significance. Distributed energy supply systems usually use natural gas as the main energy source, and internal combustion generator sets as the core energy supply components to provide users with stable and high-quality electric energy. At present, the electr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J3/38
CPCH02J3/38
Inventor 孙波巩枭李帆张承慧
Owner SHANDONG UNIV
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