CN210867493U - Multistage harmonic filter of shipborne electric equipment - Google Patents
Multistage harmonic filter of shipborne electric equipment Download PDFInfo
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- CN210867493U CN210867493U CN201921965239.7U CN201921965239U CN210867493U CN 210867493 U CN210867493 U CN 210867493U CN 201921965239 U CN201921965239 U CN 201921965239U CN 210867493 U CN210867493 U CN 210867493U
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Abstract
The utility model discloses a multistage harmonic filter of carrier-borne consumer eliminates the high low frequency harmonic interference that produces in the carrier-borne consumer through cascaded level four filter circuit, carries out dynamic reactive compensation again simultaneously to with dynamic reactive compensation, filtering and quick response combine together, thereby can follow the load change fast, restrain harmonic voltage, electric current fluctuation, provide reliable and stable power supply for the carrier-borne consumer.
Description
Technical Field
The utility model belongs to the technical field of the wave filter, more specifically say, relate to a multistage harmonic filter of carrier-borne consumer.
Background
In recent years, international situation and wind cloud change, particularly disputes to the territory, are increasingly severe, with the continuous development of military and scientific levels in China, the development of China to the ship industry is in a higher rising stage, and various corresponding problems are caused, for example, the control of harmonic interference of ship-borne electric equipment becomes one of the troublesome problems.
The current shipboard equipment adopts alternating current power supply, and the voltage provided by an ideal ship power grid system should be single fixed frequency and fixed voltage amplitude. However, the harmonic current and the harmonic voltage generated by the ship-based equipment pollute the power grid system of the whole ship, deteriorate the power utilization environment of the ship-based equipment, and have serious influence on the peripheral communication system.
In the prior art, the input end of the ship-based electric equipment generally adopts a conventional filter for filtering, but the conventional filter only filters high-frequency interference, but has no suppression effect on harmonic interference with extremely low frequency.
Therefore, how to thoroughly eliminate the harmonic interference and provide stable and reliable power supply for the ship-based electric equipment is a key point of development in the current field.
Disclosure of Invention
An object of the utility model is to overcome prior art not enough, provide a multistage harmonic filter of carrier-borne consumer, eliminate the high low-frequency interference in the carrier-borne consumer through multistage filtering mode to provide reliable and stable power supply for the carrier-borne consumer.
In order to achieve the above object, the present invention provides a multistage harmonic filter for a shipboard electrical device, comprising: a four-stage filter circuit;
the first-stage filter circuit is a first-stage harmonic filter circuit and comprises differential mode inductors L1, L2 and L3; differential mode inductors L1, L2 and L3 are respectively connected in series with the U phase, the V phase and the W phase of the three-phase input power supply and are used for inhibiting the fluctuation of harmonic voltage and current of the low-frequency band of the input power supply;
the second stage filter circuit is an LC series filter circuit and comprises differential mode inductors L4, L5 and L6 and differential mode capacitors C1, C2 and C3; the differential mode inductor L4 and the differential mode capacitor C1 are connected in series and then connected in parallel between the U phase and the V phase of the input power supply, the differential mode inductor L5 and the differential mode capacitor C2 are connected in series and then connected in parallel between the U phase and the W phase of the input power supply, and the differential mode inductor L5 and the differential mode capacitor C3 are connected in series and then connected in parallel between the V phase and the W phase of the input power supply; the LC series filter circuit is used for absorbing harmonic components in the whole circuit, compensating reactive power and filtering set harmonic frequency;
the third-stage filter circuit is a second-stage harmonic filter circuit and comprises differential mode inductors L7, L8 and L9; differential mode inductors L7, L8 and L9 are respectively connected in series with the U phase, the V phase and the W phase of the three-phase input power supply and are used for inhibiting the fluctuation of harmonic voltage and current of a middle frequency range;
the fourth stage filter circuit is an output harmonic filter circuit and comprises TVS tubes D1, D2 and D3 and differential mode capacitors C4, C5 and C6; the TVS tube D1 and the differential mode capacitor C4 are connected in series and then connected in parallel between the U phase and the V phase of the input power supply, the TVS tube D2 and the differential mode capacitor C5 are connected in series and then connected in parallel between the U phase and the W phase of the input power supply, and the TVS tube D3 and the differential mode capacitor C6 are connected in series and then connected in parallel between the V phase and the W phase of the input power supply; the output harmonic wave filter circuit is used for absorbing surge generated by unstable voltage and filtering out higher harmonic waves, so that a reliable input power supply is provided for shipborne electric equipment.
The invention aims to realize the following steps:
the utility model relates to a multistage harmonic filter of carrier-borne consumer eliminates the high low frequency harmonic interference that produces in the carrier-borne consumer through cascaded level four filter circuit, carries out dynamic reactive compensation again simultaneously to with dynamic reactive compensation, filtering and quick response combine together, thereby can follow the load change fast, restrain harmonic voltage, electric current fluctuation, provide reliable and stable power supply for the carrier-borne consumer.
Drawings
Fig. 1 is a circuit diagram of a multistage harmonic filter of the shipboard electrical equipment of the present invention.
Fig. 2 is an appearance diagram of the multistage harmonic filter of the shipborne electric equipment of the present invention.
Detailed Description
The following description of the embodiments of the present invention is provided in order to better understand the present invention for those skilled in the art with reference to the accompanying drawings. It is to be expressly noted that in the following description, a detailed description of known functions and designs will be omitted when it may obscure the subject matter of the present invention.
Examples
Fig. 1 is a circuit diagram of a multistage harmonic filter of the shipboard electrical equipment of the present invention.
In this embodiment, as shown in fig. 1, a multistage harmonic filter of a ship-based electrical device includes: a cascaded four-stage filter circuit;
the first-stage filter circuit is a first-stage harmonic filter circuit and comprises differential mode inductors L1, L2 and L3; differential mode inductors L1, L2 and L3 are respectively connected in series with the U phase, the V phase and the W phase of the three-phase input power supply and are used for inhibiting the fluctuation of harmonic voltage and current of the low-frequency band of the input power supply;
the second stage filter circuit is an LC series filter circuit and comprises differential mode inductors L4, L5 and L6 and differential mode capacitors C1, C2 and C3; the differential mode inductor L4 and the differential mode capacitor C1 are connected in series and then connected in parallel between the U phase and the V phase of the input power supply, the differential mode inductor L5 and the differential mode capacitor C2 are connected in series and then connected in parallel between the U phase and the W phase of the input power supply, and the differential mode inductor L5 and the differential mode capacitor C3 are connected in series and then connected in parallel between the V phase and the W phase of the input power supply; the LC series filter circuit is used for absorbing harmonic components in the whole circuit, compensating reactive power and filtering set harmonic frequency;
the third-stage filter circuit is a second-stage harmonic filter circuit and comprises differential mode inductors L7, L8 and L9; differential mode inductors L7, L8 and L9 are respectively connected in series with the U phase, the V phase and the W phase of the three-phase input power supply; compared with a first-order harmonic filter circuit, the second-order harmonic filter circuit has the advantages that the inductance value of the second-order harmonic filter circuit is relatively reduced, so that the second-order harmonic filter circuit can be used for inhibiting the fluctuation of medium-frequency harmonic voltage and current;
the fourth stage filter circuit is an output harmonic filter circuit and comprises TVS tubes D1, D2 and D3 and differential mode capacitors C4, C5 and C6; the TVS tube D1 and the differential mode capacitor C4 are connected in series and then connected in parallel between the U phase and the V phase of the input power supply, the TVS tube D2 and the differential mode capacitor C5 are connected in series and then connected in parallel between the U phase and the W phase of the input power supply, and the TVS tube D3 and the differential mode capacitor C6 are connected in series and then connected in parallel between the V phase and the W phase of the input power supply; the output harmonic wave filter circuit has extremely fast corresponding time and quite high surge absorption capacity, so that the output harmonic wave filter circuit can be used for absorbing surges generated by unstable voltage and filtering out higher harmonics, thereby providing a reliable input power supply for shipborne electric equipment.
As shown in fig. 2, the multi-stage harmonic filter described in the present invention is packaged in a closed metal cavity, and the rectangular cavity adopted in this embodiment can further achieve a shielding effect to prevent external electromagnetic interference.
Although illustrative embodiments of the present invention have been described above to facilitate the understanding of the present invention by those skilled in the art, it should be understood that the present invention is not limited to the scope of the embodiments, and various changes may be made apparent to those skilled in the art as long as they are within the spirit and scope of the present invention as defined and defined by the appended claims, and all matters of the invention which utilize the inventive concepts are protected.
Claims (1)
1. A multistage harmonic filter of shipborne electric equipment is characterized by comprising: a four-stage filter circuit;
the first-stage filter circuit is a first-stage harmonic filter circuit and comprises differential mode inductors L1, L2 and L3; differential mode inductors L1, L2 and L3 are respectively connected in series with the U phase, the V phase and the W phase of the three-phase input power supply and are used for inhibiting the fluctuation of low-frequency harmonic voltage and current of the input power supply;
the second stage filter circuit is an LC series filter circuit and comprises differential mode inductors L4, L5 and L6 and differential mode capacitors C1, C2 and C3; the differential mode inductor L4 and the differential mode capacitor C1 are connected in series and then connected in parallel between the U phase and the V phase of the input power supply, the differential mode inductor L5 and the differential mode capacitor C2 are connected in series and then connected in parallel between the U phase and the W phase of the input power supply, and the differential mode inductor L5 and the differential mode capacitor C3 are connected in series and then connected in parallel between the V phase and the W phase of the input power supply; the LC series filter circuit is used for absorbing harmonic components in the whole circuit, compensating reactive power and filtering set harmonic frequency;
the third-stage filter circuit is a second-stage harmonic filter circuit and comprises differential mode inductors L7, L8 and L9; differential mode inductors L7, L8 and L9 are respectively connected in series with the U phase, the V phase and the W phase of the three-phase input power supply and are used for inhibiting the fluctuation of harmonic voltage and current of a middle frequency range;
the fourth stage filter circuit is an output harmonic filter circuit and comprises TVS tubes D1, D2 and D3 and differential mode capacitors C4, C5 and C6; the TVS tube D1 and the differential mode capacitor C4 are connected in series and then connected in parallel between the U phase and the V phase of the input power supply, the TVS tube D2 and the differential mode capacitor C5 are connected in series and then connected in parallel between the U phase and the W phase of the input power supply, and the TVS tube D3 and the differential mode capacitor C6 are connected in series and then connected in parallel between the V phase and the W phase of the input power supply; the output harmonic wave filter circuit is used for absorbing surge generated by unstable voltage and filtering out higher harmonic waves, so that a reliable input power supply is provided for shipborne electric equipment.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201921965239.7U CN210867493U (en) | 2019-11-14 | 2019-11-14 | Multistage harmonic filter of shipborne electric equipment |
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| CN201921965239.7U CN210867493U (en) | 2019-11-14 | 2019-11-14 | Multistage harmonic filter of shipborne electric equipment |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112564111A (en) * | 2020-11-20 | 2021-03-26 | 江苏科技大学 | Harmonic suppression method for electric propulsion ship power grid |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112564111A (en) * | 2020-11-20 | 2021-03-26 | 江苏科技大学 | Harmonic suppression method for electric propulsion ship power grid |
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