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Line-to-line voltage compensation type current limiting energy storage circuit

An energy storage circuit and inter-line voltage technology, applied in the field of inter-line voltage compensation type current-limiting energy storage circuit, can solve problems such as inability to meet instantaneous high-power exchange, small supercapacitor energy storage capacity, and environmental pollution

Inactive Publication Date: 2009-08-12
INST OF ELECTRICAL ENG CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The charging and discharging speed of battery energy storage is slow, cannot meet the instantaneous high power exchange, and has environmental pollution problems; the energy storage capacity of supercapacitor is small, and the number of charge and discharge times is limited; pumped energy storage is limited by the environment, and the efficiency is too low

Method used

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  • Line-to-line voltage compensation type current limiting energy storage circuit
  • Line-to-line voltage compensation type current limiting energy storage circuit

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Embodiment Construction

[0012] The present invention will be further described below in conjunction with accompanying drawing and specific embodiment:

[0013] The line-to-line voltage compensation type current-limiting energy storage circuit of the present invention is as follows: figure 1 Shown in the dotted box. exist figure 1 Among them, the present invention is connected to the outlet bus of the AC power system line, and n are connected to the transformer T 1 , T 2 ...T n Connected in series in the n common load feeders, if the output voltage level of the converter matches the current-limiting voltage, the connection of the transformer can be omitted. n connected transformers T 1 , T 2 ...T n Connect n current-limiting inductors L respectively 1 , L 2 ...... L n and n converters 1 ,, converter 2 ......converter n The AC side ends of the n converters are connected through the same DC capacitor C, and the DC capacitor C is connected to the voltage commutation unit of the current regul...

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Abstract

Being connected to bus line at exit of AC power system wire, the disclosed circuit of energy storage through n pieces of connection transformer [T1, T2...Tn] respectively is connected in series to paralleled n pieces of general load feeder. N pieces of transformer are connected to ends at AC side of n pieces of current limiting inductance [L1, L2...Ln] and n pieces of converter. Through same DC capacitance, ends at DC side of n pieces of converter are connected. DC capacitance is also connected to voltage inversion unit of chopper. Current inversion unit of chopper is connected to superconducting coil. In normal operation of system, the invention can adjust asymmetric voltages in n pieces of feed line, and can play functions: filtering, reactive and wattful compensation, and regulating system tidal current. When system is in fault. The invention can limit peak value and steady state value in short circuit, increase value of breakdown voltage of bus, and compensate depressed voltage etc.

Description

Technical field: [0001] The invention relates to a current-limiting energy storage circuit, in particular to an inter-line voltage compensation type current-limiting energy storage circuit for transmission and distribution networks. Background technique: [0002] Due to the development of the power system, the increase of the load, the investment of large-capacity units, power plants and substation equipment, especially the emergence of large power plants in the load center and the interconnection of large power systems, the capacity of the transmission and distribution network has greatly increased, and it has also made The level of short-circuit current is increasing day by day, and even the level of short-circuit current has exceeded the breaking capacity of current circuit breakers. If no measures are taken to control it, it will not only greatly increase the equipment investment of the new substation, but also have a great impact on the original substation equipment in ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02H9/02H02J3/00H02J3/01H02J3/18H02J15/00
CPCY02E40/69Y02E70/30Y02E40/67Y02E40/30Y02E40/40Y02E40/60
Inventor 赵彩宏黄晓华肖立业林良真余运佳
Owner INST OF ELECTRICAL ENG CHINESE ACAD OF SCI
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