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Online measurement structure for reactive capacitance compensation

A technology of capacitance compensation and compensating capacitance, which is applied in the direction of measuring electricity, measuring devices, measuring electrical variables, etc., can solve the problems of insufficient power factor, lack of identification means for the normal operation of compensation capacitors, fines, etc., to achieve the effect of improving energy efficiency and quality.

Pending Publication Date: 2020-09-04
HUASHENG ELECTRICAL EQUIP INST SHANGHAI
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the current reactive capacitor compensation lacks the means to identify whether each compensation capacitor is operating normally.
It is obviously not enough to judge only by the appearance of the capacitor, such as whether it is bulging, whether it is leaking, whether it is generating heat, etc.
[0003] For a long time, a large number of abnormal operation of reactive capacitor compensation can be found everywhere, which is useless, which leads to fines by the grid company for insufficient power factor
On the one hand, the economic interests of users are damaged, and on the other hand, the power supply quality and operation efficiency of the power grid are also affected

Method used

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  • Online measurement structure for reactive capacitance compensation
  • Online measurement structure for reactive capacitance compensation

Examples

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Effect test

Embodiment 1

[0024] Depend on figure 1 What is shown is the online measurement structure of the bus grid-connected reactive capacitance compensation.

[0025] The bus-grid-connected reactive capacitance compensation online measurement structure is composed of a grid-connected main switch 101 and a reactive capacitance compensation online measurement structure 102 . N reactive capacitance compensation on-line measurement structures 102 are superimposed and combined to transmit the electric energy stored in capacitance to the grid ABCN through the grid-connected main switch 101 .

[0026] The reactive capacitance compensation online measurement structure 102 is composed of a fuse 103 , a second switch 104 , a current sensor 105 , a reactor 106 , a three-phase capacitor 107 (or a single-phase capacitor), a current display device 108 , and a voltage display device 109 .

[0027] A current sensor 105 and a current display device 108 are arranged between the second switch 104 of the main circui...

Embodiment 2

[0029] Depend on figure 2 What is shown is the on-line measurement system for withdrawable sub-line and grid-connected reactive capacitance compensation.

[0030] The withdrawable split-line grid-connected reactive capacitance compensation on-line measurement structure 200 consists of a first switch (static contact 201, moving contact 202), a fuse 203, a second switch 204, a current sensor 205, a reactor 206, and a three-phase capacitor Or single-phase capacitor 207, current display device 208, and voltage display device 209.

[0031] N withdrawable split-line grid-connected reactive power compensation on-line measurement structures 200 directly transmit electric energy stored in capacitors to the grid ABCN. The static contact 201 of the first switch of the main circuit of the withdrawable split-line grid-connected reactive capacitance compensation online measurement structure 200 is connected to the grid ABCN, and the moving contact 202 of the first switch is connected to t...

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Abstract

The invention provides an online measurement structure for reactive capacitance compensation. The structure comprises a plurality of compensation capacitors to be measured, a plurality of current detectors and a plurality of voltage detectors, and is characterized in that the plurality of compensation capacitors to be measured are connected with a power grid through a main switch; or the pluralityof compensation capacitors to be tested are connected with the power grid through first switches respectively; each current detector is arranged in a circuit between the compensation capacitor to betested and the main switch or the first switch, and the voltage detector is connected with the compensation capacitor to be tested. On-line measurement of each reactive compensation capacitor is realized, so that the energy efficiency and the quality of a power grid are improved.

Description

technical field [0001] The invention relates to the field of power grid and power distribution, in particular to an on-line measurement structure for reactive capacitance compensation. Background technique [0002] The electrical equipment of the power system will generate reactive power when it is used, and it is usually inductive. It will reduce the capacity utilization efficiency of the power supply, and it can be improved by appropriately increasing the capacitance in the system. Based on the reactive power of the AC grid, capacitor compensation is needed to adjust the power factor to improve the operating efficiency and power quality of the grid. However, the current reactive capacitor compensation lacks the means to identify whether each compensation capacitor is operating normally. It is obviously not enough to judge only by the appearance of the capacitor, such as whether it is bulging, whether it is leaking, whether it is heating or not. [0003] For a long time, ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J13/00G01R31/00
CPCH02J13/00002G01R31/00G01R31/003
Inventor 何成祥
Owner HUASHENG ELECTRICAL EQUIP INST SHANGHAI
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