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Balancing power distribution system of 10kV and below power distribution network

A technology of power distribution system and power distribution network, applied in the direction of parallel feeding arrangement of single network, reduction of asymmetry of multi-phase network, reduction of harmonic/ripple of AC network, etc., can solve the problem of affecting normal industrial production, time-consuming and laborious and other problems, to achieve the effect of quickly balancing three-phase power, suppressing system harmonics, and compensating reactive power

Inactive Publication Date: 2009-11-25
BEIJING JIAOTONG UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, this method is time-consuming and laborious, and can only make the distribution network tend to be three-phase balanced, affecting normal industrial production

Method used

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  • Balancing power distribution system of 10kV and below power distribution network
  • Balancing power distribution system of 10kV and below power distribution network
  • Balancing power distribution system of 10kV and below power distribution network

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Embodiment Construction

[0014] Embodiments of the present invention will be further described in conjunction with the accompanying drawings:

[0015] figure 1 It is a structural schematic diagram of the balanced distribution system of the 10kV and below distribution network of the present invention. The first AC output terminal U of the comprehensive compensation device 101 is connected to the first feeder 111 of the grid, and the contact point is the first common connection point PCC1, and the second AC output terminal V of the comprehensive compensation device 101 is connected to the second feeder line 112 of the grid, and the contact point is the first The second common connection point PCC2, the third AC output terminal W of the comprehensive compensation device 101 is connected to the third feeder 113 of the power grid, and the contact point is the third common connection point PCC3.

[0016] The comprehensive compensation device 101 is controlled as a current source, and outputs a current sign...

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Abstract

The invention discloses a balancing power distribution system for 0kV and below power distribution network, belonging to the electrical distribution technology field. A first, second and third AC output ends (U) (V) (W) of a synthetic compensating gear (101) are respectively connected in parallel with a first, second and third feeder lines (111) (112) (113) of a switch-in electric network, the synthetic compensating gear is controlled as a current source and output the current signal, the current signal is superposed to the load current of a three-phase non-linearity asymmetric load, a three-phase symmetrical electric network current is obtained at the three-phase power distribution network side. A first, second and third public joint points of the synthetic compensating gear is located at the high-voltage side of a step-down distributing transformator or at the low-voltage side of the step-down distributing transformator. The balancing power distribution system can meet various electrical distribution requirements of a low-voltage power consumer, and realize the quick balancing of the power distribution network three-phase power, at the same time, the balancing power distribution system can compensate the electric network reactive power, restrain the system harmonic and effectively improve the utilization ratio of the distributing transformator.

Description

technical field [0001] The invention relates to a medium and low voltage power transmission and distribution scheme, in particular to a balanced power distribution system of a 10kV and below power distribution network, belonging to the technical field of power distribution. Background technique [0002] With the development of industry, various types of electrical equipment, including power electronic devices, continue to increase. On the one hand, more sources of interference are introduced. On the other hand, more electrical equipment requires high-quality electrical energy. Hence the contradiction between supply and demand. In the medium and low voltage distribution network, the nonlinear load of the three-phase line has great randomness, and it is impossible to be completely balanced. The unbalanced operation of the distribution transformer will bring the transformer operation loss and the three-phase distribution voltage deviation, and in this operation state, a negati...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J3/26H02J3/18H02J3/01H02J3/38
CPCY02E40/50Y02E40/30Y02E40/40
Inventor 郑琼林杨晓峰林飞黄先进孙湖贺明智
Owner BEIJING JIAOTONG UNIV
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