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Method and system for restraining resonance of civil power distribution system by power conditioning

A power distribution system and resonance suppression technology, which is applied in the field of power supply purification and suppression of resonance in civil power distribution systems, can solve problems such as changes in equipment-to-ground capacitance parameters, and achieve the effect of improving health level and solving electromagnetic environment problems.

Inactive Publication Date: 2014-01-22
STATE GRID CORP OF CHINA +2
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Problems solved by technology

Also, under the same environment and the same electrical equipment conditions, if the external activating factors (high-frequency electromagnetic wave start) are different, the parameters of the equipment's capacitance to ground will change in a short time

Method used

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  • Method and system for restraining resonance of civil power distribution system by power conditioning
  • Method and system for restraining resonance of civil power distribution system by power conditioning

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Embodiment Construction

[0014] The invention provides a method for purifying and suppressing resonance of a civil power distribution system power supply. A single-phase series reactor is provided after being connected in series with the residential watt-hour meter, and the resonance point is controlled within the frequency range where the resonance of the live part to the ground does not occur; a method is also provided. The three-phase series reactor is installed after the distribution transformer of the power distribution system.

[0015] The present invention also provides a system for purifying and suppressing resonance of civil power distribution system, such as figure 1 as shown, figure 1 It is a wiring diagram of installing a three-phase series reactor on the 400V side of the distribution transformer of the power distribution system, and connecting a single-phase reactor in series on the 220V line of the watt-hour meter of each household; it includes a distribution transformer, and the power d...

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Abstract

The invention relates to a method and a system for restraining resonance of a civil power distribution system by power conditioning. The method is characterized by comprising the following steps of providing a single-phase series reactor, connecting the single-phase series reactor to a resident watt hour meter in series, and then, controlling a resonance point to be within a frequency range that the ground resonance of a live part cannot occur. According to the method and the system provided by the invention, the reliability, the stability and the safety of the power supply of a civil power distribution network are improved at lower investment. Meanwhile, the electromagnetic environment problem is well solved, and therefore, the resident health level is improved, and the wireless communication industry and various high-technology industries which need to normally transmit electromagnetic waves are helped to develop.

Description

technical field [0001] The invention relates to a method and system for purifying and suppressing resonance of a civil power distribution system power supply, which is suitable for 400V power distribution systems and 220V residential power users. Background technique [0002] For a long time, the biggest trouble that has plagued residents in electricity consumption is that indoor power distribution systems and various household appliances are prone to various electromagnetic resonance and electromagnetic radiation. The main reason is that the distribution network used in my country and most countries adopts TN wiring, that is, the 400V on the low-voltage side of the distribution transformer adopts the neutral point grounding method, and the protective earth (PE) point of the residential households is also connected to the neutral point. This wiring method was originally a technical measure taken by the power department to ensure the stability of the ground voltage and the gr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J3/00
Inventor 陈宙唐志军林国栋邓超平林少真林金东
Owner STATE GRID CORP OF CHINA
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