Active full-harmonic arc-extinction control method capable of realizing power feedback, and system therefor
A control method and power technology, which are applied to emergency protection circuit devices, electrical components, circuit devices and other directions for limiting overcurrent/overvoltage, and can solve the problems that the current of active power cannot be fed back to the grid and eliminate harmonic currents.
Active Publication Date: 2016-05-25
ANHUI ONESKY ELECTRIC TECH
View PDF2 Cites 6 Cited by
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
[0003] The purpose of the present invention is to overcome the deficiencies of the prior art, and provide a power feedback active full harmonic arc suppression control method and its system to solve the problem that the existing power grid fault grounding arc suppression technology cannot control the ground fault. All harmonic currents are quickly and completely eliminated, and the current of active power cannot be fed back to the grid.
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 1
[0061] The present invention also provides an active full harmonic arc suppression system with power feedback, which has the following features: figure 1 The structure shown includes a control module, and a grid-connected voltage sampling module, a grid-connected current sampling module, a DC voltage sampling module, a grid-side power compensation module and a fault current sampling module connected to it, wherein:
[0062] The grid-side power compensation module includes a rectifier bridge circuit and an inverter bridge circuit connected in sequence, the input end of the rectifier bridge circuit is connected to the three-phase power grid through a reactance group L2, and the output end of the inverter bridge circuit is connected through a compensation transformer T1 is connected in series with the arc suppressing coil of the three-phase grid;
[0063] The grid-connected voltage sampling module includes two sets of grid-connected voltage sampling sensors PT2 and PT3 for collec...
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 the technical field of a control method for arc-extinction equipment, and specifically provides an active full-harmonic arc-extinction control method capable of realizing power feedback, and a system therefor. The method comprises the following steps of 1), executing a three-phase power grid voltage processing method; 2), executing a direct current voltage processing method; and 3) executing a ground fault current compensating method; the system comprises a control module, and a grid-connection voltage sampling module, a grid-connection current sampling module, a direct current voltage sampling module, a power grid side power compensation module and a fault current sampling current that are connected with the control module. Compared with the prior art, the method can realize rapid detection on fundamental reactive current, harmonic reactive current, harmonic active current and fundamental active power, and as well as can fully compensate the fundamental reactive, harmonic reactive and harmonic active current; meanwhile, the active power part can be fed back to the power grid side, so that the compensation speed and accuracy in ground faults can be improved to a large extent, and the operating safety of the power system is greatly improved consequently.
Description
technical field [0001] The present invention relates to a control method of arc suppression equipment, in particular to an active full harmonic arc suppression control method with power feedback and its system. Background technique [0002] With the acceleration of urbanization, the power distribution network has generally developed in the direction of large capacity and multiple outlets in recent years. The widespread use of urban cable networks has intensified this trend of capacity expansion. At the same time, the progressive society has put forward higher and higher requirements for the reliability of power supply, and the reliability of power supply has become an important criterion for measuring the success of power supply enterprises. In this context, the distribution network mainly adopts the neutral point grounding method through the arc suppression coil. The traditional neutral point resonant grounded power grid such as figure 1 As shown, when a ground fault occ...
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): H02H9/08
CPCH02H9/08
Inventor 李瑜尹陆军
Owner ANHUI ONESKY ELECTRIC TECH