Abstract
This paper describes the technical principles of series compensation, and introduces the series compensation device structure, and finally got through simulation effects of rapid switching Series Compensation for distribution network distance protection. Distribution network is an important network connections and power grid users, from the distribution of electric energy in the power system, the strength of its transmission capacity directly determines the power user power quality is good or bad. However, since the electricity distribution network of long-term failure to get the attention of practitioners, its construction and the relatively slow pace of reconstruction, the aging serious, increasingly unable to meet the annual growth of electricity demand.The main problem with the presence of the grid are:Distribution network construction is lagging behind, power transmission grid capacity is insufficient. Network structure is irrational, power supply radius is too long, circuitous route power line terminal voltage is too low. Part serious aging distribution equipment and lines, the line number is small, backward technology, serious power loss. Reactive power shortage, power grid is not economical and low power quality. Therefore, how to improve the status of the distribution network has become the focus of power workers
Highlights
Value of series compensationBy capacitive reactance series compensation to offset the line inductance, reducing the electrical distance between the power source and the load point, can solve a series of problems exist in the distribution network, its value lies in: 1) solve the supply radius distribution network end of the line is too long due to excessive voltage offset problems and improve power quality
This paper describes the technical principles of series compensation, and introduces the series compensation device structure, and got through simulation effects of rapid switching Series Compensation for distribution network distance protection
By capacitive reactance series compensation to offset the line inductance, reducing the electrical distance between the power source and the load point, can solve a series of problems exist in the distribution network, its value lies in: 1) solve the supply radius distribution network end of the line is too long due to excessive voltage offset problems and improve power quality
Summary
By capacitive reactance series compensation to offset the line inductance, reducing the electrical distance between the power source and the load point, can solve a series of problems exist in the distribution network, its value lies in: 1) solve the supply radius distribution network end of the line is too long due to excessive voltage offset problems and improve power quality. 1.2 Series technical principle of compensation Action series line voltage compensation to improve: AC line, due to the presence of line resistance and reactance, in power through the load, will produce a voltage drop, the voltage is reduced. Series capacitor compensated by the capacitive reactance to counteract the line inductance reduces the voltage drop across the load current line reactance enhance the line voltage and reduces the phase angle difference between the terminal voltage line first. Series compensation for reducing line loss effect: When the load current flows through the transmission line will produce power loss on line resistance proportional to the square of its size and the current value. Since the series compensation capacitor of access, so that the line voltage increases, at constant load power load current is reduced, thereby reducing the power loss generated on the line. Series compensation is used to compensate for line reactance, thereby enhancing the transmission capacity of the line [9,10,11,12]
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