CN103296627A - Second order filter mechanism of rural power grid de-icing device - Google Patents
Second order filter mechanism of rural power grid de-icing device Download PDFInfo
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- CN103296627A CN103296627A CN2013102464947A CN201310246494A CN103296627A CN 103296627 A CN103296627 A CN 103296627A CN 2013102464947 A CN2013102464947 A CN 2013102464947A CN 201310246494 A CN201310246494 A CN 201310246494A CN 103296627 A CN103296627 A CN 103296627A
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Abstract
The invention discloses a second order filter mechanism of a rural power grid de-icing device. The second order filter mechanism consists of a second order inductance filter (1), a second order capacitive filter (2), a harmonic measurement instrument (3), an inductance adjuster (4) and a capacitance adjuster (5), wherein the output end of the second order inductance filter (1) is connected with the input end of the second order capacitive filter (2). The output end of the second order capacitive filter (2) is connected with the input end of the harmonic measurement instrument (3). The output end of the harmonic measurement instrument (3) is connected with the inductance adjuster (4) and the input end of the capacitance adjuster (5) in parallel. The current harmonic distortion on the input side of the rural power grid de-icing device can be effectively suppressed, adjustment of an inductance value and a capacitance value can be automatically implemented, the good smoothing effect is played on current fluctuation on the output side, and adjustment amplitude of the chopped wave frequency of an insulated gate bipolar transistor (IGBT) can be effectively improved in a harmonic permissible range.
Description
Technical field
Patent of the present invention belongs to the electrical engineering technical field, relating to a kind of is the abbreviation of Insulated Gate Bipolar Transistor based on the English full name of IGBT(, and Chinese translation is insulated gate bipolar transistor) the second-order filter mechanism of the rural power grids DC de-icing device of copped wave principle.
Background technology
China's south ice and snow disaster takes place frequently, and bring serious damage easily for the grid power transmission circuit, and the rural power grids transmission line distributes extensively, and quantity is many, and the easier icing that causes is damaged.If adopt the direct current ice-melt, reactive component adds onesize ice melting current with inoperative on the transmission line, and the voltage ratio alternating current ice-melt of adopting the direct current ice-melt to apply is much smaller, has improved fail safe and the economy of deicing processes greatly.The direct current ice-melt has obtained using widely in the anti-freezing disaster of powerline ice-covering at home.
The circuit model of rural power grids transmission line is not only much but also more complicated, so the direct voltage of rural power grids DC de-icing device output needs the continuous adjustable needs that could satisfy the rural power grids power line DC ice-melting.And based on the continuous adjustable deicing device of the output dc voltage of IGBT DC chopped-wave principle because simple in structure, the continuous adjustability of VD is good and find broad application.But this device utilizes the high frequency open and close of IGBT to realize the continuous output of direct voltage, causes the deicing device input side to distort than high-current harmonic easily, causes serious harmonic pollution to electrical network.
Summary of the invention
The technical problem to be solved in the present invention is: at the defective that prior art exists, provide a kind of based on the copped wave principle, improved rural power grids deicing device second-order filter mechanism.Use this mechanism, can effectively suppress because the rural power grids deicing device input side harmonic pollution that IGBT high frequency DC chopped-wave causes.
Technical scheme of the present invention is, the rural power grids deicing device second-order filter mechanism that provides, and referring to Fig. 1, it is connected to form by second order inductance filter 1, second order capacitive filter 2, harmonic measuring instrument 3, induction regulator 4 and capacity regulator 5 as shown in Figure 1.The output of wherein said second order inductance filter 1 connects the input of second order capacitive filter 2.The output of second order capacitive filter 2 connects the input of harmonic measuring instrument 3, the output of harmonic measuring instrument 3 the be connected in parallel input of induction regulator 4 and the input of capacity regulator 5.And the output of described induction regulator 4 is connected with the input of above-mentioned second order inductance filter 1.The output of described capacity regulator 5 is connected with the input of above-mentioned second order capacitive filter 2.
The rural power grids deicing device second-order filter of the present invention mechanism that constitutes thus forms second order by equivalent inductance and electric capacity and decides K type filtering mechanism, also claim second-order filter mechanism, during use, with the external three phase rectifier DC power supply of the input of its second order inductance filter 1, can make second order inductance filter 1 and second order capacitive filter 2 constitute second-order filter mechanisms, and so as to eliminating the current harmonics of the rural power grids deicing device input side that the IGBT high frequency chopping causes.Simultaneously, harmonic measuring instrument 3 output dc voltages, in order to DC side current harmonic content and the aberration rate of measuring IGBT high frequency chopping generation, and the result that will measure flows to induction regulator 4 and capacity regulator 5.Induction regulator 4 is DC side harmonic content data according to the measurement result that receives, and implements the dynamic adjustments to the inductance value of second order inductance filter 1 immediately.The capacity regulator 5 then measurement result that receives of foundation is DC side harmonic content data, implements the dynamic adjustments to the capacitance of second order capacitive filter 2 immediately.
The invention has the beneficial effects as follows:
1), will introduce second-order filter mechanism based on the rural power grids deicing device DC side of copped wave principle after, can effectively suppress this device input side current harmonics and distort.
2), second-order filter mechanism can implement inductance value and the capacitance of this mechanism of dynamic adjustments automatically according to detected deicing device DC side harmonic content, the outlet side current fluctuation that load changing is caused has good smoothing effect.
3), introduce second-order filter mechanism based on the rural power grids deicing device of copped wave principle after, in the harmonic wave allowed band, can effectively improve the adjusting width of IGBT chopping frequency.
Description of drawings
Fig. 1 is the structured flowchart of a specific embodiment of rural power grids deicing device second-order filter mechanism of the present invention, is denoted as among the figure:
1-second order inductance filter,
2-second order capacitive filter,
3-harmonic measuring instrument,
4-induction regulator,
5-capacity regulator.
Embodiment
Referring to specific embodiment of rural power grids deicing device second-order filter mechanism of the present invention shown in Figure 1, the LSL-600mh type variable inductor that the second order inductance filter 1 of this embodiment adopts Hunan China province Changsha foot of a hill or mountain mountain Electronics Co., Ltd. to produce; The HCC-600mf type adjustable condenser that second order capacitive filter 2 adopts Chinese Xian City, Shanxi Province magnificent electrochemical capacitance Co., Ltd to produce; Harmonic measuring instrument 3 adopts Hunan China to economize the HCKJ-XB1 type harmonic measuring instrument that the pure Power Tech Corp. Inc. of remittance develops; Induction regulator 4 adopts Hunan China to economize the HCDG-TJ1 type induction regulator that the pure Power Tech Corp. Inc. of remittance develops; Capacity regulator 5 adopts Hunan China to economize the HCDR-TJ1 type capacity regulator that the pure Power Tech Corp. Inc. of remittance develops.Described second order inductance filter 1, second order capacitive filter 2, harmonic measuring instrument 3, induction regulator 4 and capacity regulator 5 are according to technique scheme and with reference to connection shown in Figure 1.Wherein the output of second order inductance filter 1 connects the input of second order capacitive filter 2.The output of second order capacitive filter 2 connects the input of harmonic measuring instrument 3, the output of harmonic measuring instrument 3 the be connected in parallel input of induction regulator 4 and the input of capacity regulator 5.And the output of induction regulator 4 is connected with the input of second order inductance filter 1.The output of capacity regulator 5 is connected with the input of second order capacitive filter 2.
The rural power grids deicing device second-order filter mechanism of said structure is proved to be respond well through manufacturing experimently on probation and dropping into test run, and simple for structure, automatic adjusting is reliable, reaches designing requirement fully.
Claims (1)
1. rural power grids deicing device second-order filter mechanism, it is characterized in that, it is by second order inductance filter (1), second order capacitive filter (2), harmonic measuring instrument (3), induction regulator (4) and capacity regulator (5) connect to form, the output of wherein said second order inductance filter (1) connects the input of second order capacitive filter (2), the output of second order capacitive filter (2) connects the input of harmonic measuring instrument (3), the output of harmonic measuring instrument (3) the be connected in parallel input of induction regulator (4) and the input of capacity regulator (5), and the output of described induction regulator (4) is connected with the input of above-mentioned second order inductance filter (1), and the output of described capacity regulator (5) is connected with the input of above-mentioned second order capacitive filter (2).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013102464947A CN103296627A (en) | 2013-06-20 | 2013-06-20 | Second order filter mechanism of rural power grid de-icing device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013102464947A CN103296627A (en) | 2013-06-20 | 2013-06-20 | Second order filter mechanism of rural power grid de-icing device |
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| CN103296627A true CN103296627A (en) | 2013-09-11 |
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| CN2013102464947A Pending CN103296627A (en) | 2013-06-20 | 2013-06-20 | Second order filter mechanism of rural power grid de-icing device |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS61210818A (en) * | 1985-03-14 | 1986-09-19 | 住友電気工業株式会社 | Preventor for ice and snow attached on overhead ground wire |
| CN1149784A (en) * | 1995-11-01 | 1997-05-14 | 三星电子株式会社 | Power supply control and its method |
| CN102412633A (en) * | 2011-11-17 | 2012-04-11 | 东南大学 | Power control system based on frequency-adjustable wireless power transmission device |
| CN103069679A (en) * | 2010-08-06 | 2013-04-24 | 株式会社明电舍 | Harmonic current suppression method and harmonic current suppression device of power conversion device |
| CN203301356U (en) * | 2013-06-20 | 2013-11-20 | 国家电网公司 | Two-order filtering mechanism of ice melting apparatus of rural power grid |
-
2013
- 2013-06-20 CN CN2013102464947A patent/CN103296627A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS61210818A (en) * | 1985-03-14 | 1986-09-19 | 住友電気工業株式会社 | Preventor for ice and snow attached on overhead ground wire |
| CN1149784A (en) * | 1995-11-01 | 1997-05-14 | 三星电子株式会社 | Power supply control and its method |
| CN103069679A (en) * | 2010-08-06 | 2013-04-24 | 株式会社明电舍 | Harmonic current suppression method and harmonic current suppression device of power conversion device |
| CN102412633A (en) * | 2011-11-17 | 2012-04-11 | 东南大学 | Power control system based on frequency-adjustable wireless power transmission device |
| CN203301356U (en) * | 2013-06-20 | 2013-11-20 | 国家电网公司 | Two-order filtering mechanism of ice melting apparatus of rural power grid |
Non-Patent Citations (1)
| Title |
|---|
| 陆佳政等: "可减小输入侧谐波及输出电压可调的融冰装置", 《高电压技术》 * |
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Application publication date: 20130911 |