Reactive response control system of demand side back-to-back converter
A back-to-back converter and control system technology, applied in reactive power compensation, reactive power adjustment/elimination/compensation, AC network circuits, etc., can solve the problem of inflexible reactive power control, etc., to improve stability and flexibility , the balance of supply and demand of the power grid, and the effect of ensuring stable operation
Inactive Publication Date: 2020-04-03
NANJING NORMAL UNIVERSITY
View PDF7 Cites 2 Cited by
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
[0004] Purpose of the invention: In order to solve the technical problems raised by the above-mentioned background technology, the present invention aims to provide a reactive power response control system for back-to-back converters on the demand side, which enhances the stability of the reactive power response control on the demand side and compensates for the lack of reactive power control on the demand side. Disadvantages of being flexible
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
[0025] The technical solutions of the present invention will be described in detail below with reference to the accompanying drawings.
[0026] figure 1 It is a schematic diagram of the system composition of the present invention, including a main circuit structure and a control module. Two voltage source pulse width modulation converters are connected in a back-to-back manner by means of intermediate DC energy storage capacitors to form a back-to-back converter. The back-to-back converter and the demand side load are connected in series to form the main circuit structure of the present invention, wherein the DC energy storage capacitor C acts to provide DC voltage support and reduce the harmonics on the DC side; the AC side inductances L and Lf act on the converter and the The AC grid realizes energy exchange and filters out harmonics in the current. control modules such as figure 2 As shown, a reactive power response control system consisting of a virtual excitation cont...
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 discloses a reactive response control system of a demand side back-to-back converter. The system comprises a main circuit structure and a control module, the control module adopts a virtual excitation controller, a damping / inertia simulator, a reactive instruction follower and a dynamic phase generator; modulation signals m and n generated by the control system can send out a specified alternating-current voltage according to a demand side reactive response instruction, so that a demand side load accurately and dynamically responds to the reactive instruction. The reactive response control system plays a positive role in balancing the supply and demand of a power grid under the condition that a large number of distributed power supplies are connected, meeting the ever-increasing reactive power demand of a power system and improving the stability and flexibility of power demand side response, and can realize flexible and continuous control of demand side reactive power without being disturbed by network side voltage / frequency.
Description
technical field [0001] The invention belongs to the technical field of demand side management of power systems, and particularly relates to a reactive power response control system of a demand side back-to-back converter. Background technique [0002] Under the dual pressure of fossil energy crisis and environmental pollution, distributed power generation technology based on renewable energy has been highly valued by people due to its advantages of low investment, flexible power generation, and compatibility with the environment, but distributed power is connected to the grid. It will affect the power quality indicators, introduce a large number of harmonics, and cause problems such as the decline of power supply reliability. At the same time, the rapid growth of the national economy has kept the electricity consumption of the whole society increasing year by year. It is still unable to meet the load demand only by increasing the energy supply, and the peak-to-valley differe...
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): H02J3/18
CPCH02J3/1821Y02E40/30
Inventor 吕潇马刚李天慧吴薛红郑梅李枫
Owner NANJING NORMAL UNIVERSITY