Droop Control Method and Droop Controller for Automatic Compensation of Bus Voltage Deviation
A bus voltage and automatic compensation technology, applied in the direction of AC network voltage adjustment, etc., can solve the problems of increasing the construction cost of the micro-grid and reducing the reliability of the system, so as to achieve the effect of saving investment and operation and maintenance costs, and ensuring the power quality of the bus
Inactive Publication Date: 2018-08-03
XUJI GRP +2
View PDF4 Cites 0 Cited by
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
[0006] However, using the voltage regulation method of the communication system requires additional installation of measuring devices at the busbar and an additional communication system to realize the communication of measurement signals and control commands, which greatly increases the construction cost of the microgrid; and the control method relies on communication The system's real-time and accurate communication of measurement signals and control commands reduces the reliability of the entire system
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
[0039] The present invention will be described in further detail below in conjunction with the accompanying drawings.
[0040] Such as figure 1 It is a droop control method with virtual impedance control for automatic compensation of bus voltage deviation. The method mainly includes three parts: the main body is the traditional droop control part, and it also includes the virtual impedance control part and the bus voltage deviation control part.
[0041] In fact, both the droop control part and the virtual impedance control part belong to the prior art. A brief introduction to these two parts is given below.
[0042] In a single-phase system, the output voltage and output current measured locally by the distributed power converter are transformed into variables in the αβ coordinate system by delaying 1 / 4 cycle. In the αβ coordinate system, the active power and reactive power output by distributed power generation can be calculated by the following formula:
[0043]
[00...
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 droop control method and droop controller for automatic deviation compensation of a bus voltage. The droop control method comprises the following steps of outputting active power and reactive power by a convertor of droop control, and calculating the bus voltage by combining an impedance parameter of droop control; comparing the bus voltage obtained through calculation with a rated value of the bus voltage to obtain bus voltage deviation; and adjusting the bus voltage deviation by a proportional controller, and superposing compensation quantity to a voltage amplitude output from the droop control U-Q. By the method, intercommunication is not needed, and investment and operation and maintenance cost of a voltage measurement device and a communication system which are additionally arranged at a bus are saved.
Description
technical field [0001] The invention relates to the field of distributed power generation, in particular to a droop control method for automatic compensation of bus voltage deviation. Background technique [0002] The microgrid including the distributed generation system has greater flexibility in the operation mode, and it can be operated in parallel with the grid or in an island. When the microgrid operates in an isolated island, the distributed power generation system in the microgrid needs to bear the power demand of the load. Droop control, as an important control method for distributed power generation in microgrid island operation, can reasonably control the power output between distributed power sources and is widely used. [0003] In the prior art, there is also a droop control method in which virtual impedance control is added. By superimposing the command of virtual impedance control in the control command, in order to obtain better control characteristics, [...
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 Patents(China)
IPC IPC(8): H02J3/12
CPCH02J3/12
Inventor 李献伟毋炳鑫高峰丁广乾谢卫华刘德贵许丹王雷涛
Owner XUJI GRP