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Resonance elimination apparatus and resonance elimination system

A technology of harmonic elimination and reactor, which is applied in the field of power system, can solve the problems of lack of harmonic elimination devices, etc., and achieve the effect of preventing burning, avoiding impact and enhancing stability

Active Publication Date: 2017-03-22
YUNNAN POWER GRID CO LTD ELECTRIC POWER RES INST
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Problems solved by technology

[0004] However, the pre-adjusted arc suppressing coil is only suitable for the power system with the neutral point grounded. For the power system with the neutral point not grounded, such as the small current power system with the capacitor current less than 10A, there is currently a lack of an effective harmonic elimination device.

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  • Resonance elimination apparatus and resonance elimination system
  • Resonance elimination apparatus and resonance elimination system
  • Resonance elimination apparatus and resonance elimination system

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Embodiment Construction

[0028] Reference will now be made in detail to the exemplary embodiments, examples of which are illustrated in the accompanying drawings. When the following description refers to the accompanying drawings, the same numerals in different drawings refer to the same or similar elements unless otherwise indicated. The implementations described in the following exemplary examples do not represent all implementations consistent with the present invention. Rather, they are merely examples of apparatuses and methods consistent with aspects of the invention as recited in the appended claims.

[0029] The harmonic elimination device provided by this implementation is applied to the neutral point ungrounded system with a capacitive current less than 10A. For the neutral point ungrounded system, it is impossible to eliminate the ferromagnetism by connecting the harmonic elimination device to the neutral point of the system and grounding it. Resonance, the safe operation of the system is ...

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Abstract

The invention relates to a resonance elimination apparatus and a resonance elimination system. The resonance elimination apparatus comprises a three-phase five-column type reactor and a damping resistor, wherein the three-phase five-column type reactor comprises reactor primary windings and reactor secondary windings, one end of each reactor primary winding is grounded in parallel, the other end is used for connection with a three-phase power source, the reactor secondary windings are connected in series to form an opening triangle, one end of the opening triangle is grounded, the other end is connected with one end of the damping resistor, and the other end of the damping resistor is grounded. The resonance elimination system comprises an electromagnetic voltage transformer, a three-phase power source and the resonance elimination apparatus. According to the resonance elimination apparatus and the resonance elimination system provided by the embodiments of the invention, when a single-phase grounding fault takes place in a power system, a low-impedance discharge channel of grounding capacitive currents is provided, burning damage of an electromagnetic voltage transformer and fusion of an electromagnetic voltage transformer fuse are effectively prevented, and the operation stability, safety and reliability of the power system are enhanced.

Description

technical field [0001] The invention relates to the technical field of power systems, in particular to a harmonic elimination device and a harmonic elimination system. Background technique [0002] When a single-phase ground fault occurs in the power system or the current in the power system fluctuates greatly, ferromagnetic resonance will occur, causing the power system to generate resonant overvoltage. Higher resonant overvoltage will cause voltage transformers in the power system Explosion and burnout of voltage transformer fuses directly threaten the safe operation of the power system. [0003] In the related art, for the ferromagnetic resonance generated in the power system, using a pre-adjusted arc suppressing coil to eliminate the resonance is an effective solution. The use of pre-adjusted arc-suppression coil harmonic elimination means that when the power system is in normal working condition, the arc-suppression coil is adjusted to a suitable position in advance, s...

Claims

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Application Information

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IPC IPC(8): H02H9/08
CPCH02H9/08
Inventor 刘红文王科李瑞贵李昊
Owner YUNNAN POWER GRID CO LTD ELECTRIC POWER RES INST
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