Zero-sequence filtering electricity-saving device

Abstract

The invention provides a zero-sequence filtering electricity-saving device. According to the zero-sequence filtering electricity-saving device, three iron core limbs are combined, every two of the three iron core limbs form a 120-degree angle in the spatial position, and the three iron core limbs form a structure which is shaped like a Chinese character 'pin'. Windings wind around the iron core limbs, the windings include a winding A1, a winding A2, a winding A3, a winding B1, a winding B2, a winding B3, a winding C1, a winding C2 and a winding C3, the winding A3, the winding B3 and the winding C3 wind around the iron core limbs in the anticlockwise direction, and the other windings wind around the iron core limbs in the clockwise direction. The head end of the winding A2 is connected with the tail end of the winding A1, the tail end of the winding A2 is connected with the tail end of the winding B3, the head end of the winding B2 is connected with the tail end of the winding B1, the tail end of the winding B2 is connected with the tail end of the winding C3, the head end of the winding C 2 is connected with the tail end of the winding C1, and the tail end of the winding C2 is connected with the tail end of the winding A3. The tail ends of the winding A1, the winding B1 and the winding C1 are used as output ends and are connected with a load system in a matching mode, and the head ends of the winding A3, the winding B3 and the winding C3 gather together and are connected to a neutral line of the load system.

Description

technical field [0001] The invention relates to a power saver, in particular to a zero-sequence filter power saver, which is an electric power saver which can properly reduce voltage and filter zero-sequence fundamental wave and triple frequency harmonic current on the load side. The invention belongs to the category of low-voltage electrical appliances. Background technique [0002] As far as the applicant knows, the existing three-phase four-wire low-voltage power distribution system generally has the phenomena of high voltage, unbalanced three-phase load and harmonic pollution, which will lead to increased loss of electrical equipment and will The neutral line of the power distribution system produces heat loss; in addition, the eddy current loss and stray loss of the distribution transformer caused by harmonics also exist objectively, which makes the power consumption efficiency drop. In response to the above problems, power savers are usually used to improve power effi...

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Problems solved by technology

After research, the applicant found that although the invention can regulate the voltage, it is not capable of compensating for unbalanced three-phase loads and harmonics.

[0004] Another example is the "Power Saver" disclosed in the Chinese patent literature (patent No. 200320116133.2), which is a three-phase or single-phase power saver, which uses a series circuit of a choke coil and a filter capacitor with a special winding method and a varistor. , which can achieve reactive power compensation for transmission lines to improve operating efficiency, but there are also certain defects, that is, the compensation effect for unbalanced loads is not good

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