CN201174564Y - Direct-current ice melting apparatus - Google Patents
Direct-current ice melting apparatus Download PDFInfo
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- CN201174564Y CN201174564Y CNU2008200526816U CN200820052681U CN201174564Y CN 201174564 Y CN201174564 Y CN 201174564Y CN U2008200526816 U CNU2008200526816 U CN U2008200526816U CN 200820052681 U CN200820052681 U CN 200820052681U CN 201174564 Y CN201174564 Y CN 201174564Y
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Abstract
The utility model provides a DC ice-melting apparatus which comprises a main circuit and a controller, wherein the main circuit comprises a three-phase bridge fully-controlled rectifier circuit, a freewheel diode, and a signal detector, wherein one end of the main circuit is connected with the three-phase AC output by a distribution network or a generator, while the other end is connected with a DC distribution system, the three-phase bridge fully-controlled rectifier circuit consists of 6 switch units including V1-V6, the signal detector connected with the DC output of the three-phase bridge fully-controlled rectifier circuit is used for real-time detection of the voltage signals and the current signals on the DC output. The controller is connected with the main circuit and used to trigger the switch units including V1-V6 in the three-phase bridge fully-controlled rectifier circuit based on the real-time detection of both the voltage signals and the current signals by the signal detector, thereby realizing the constant voltage and constant current on the DC output. The utility model is capable of decreasing the reactive power of an ice-melting device, saving energy, lowering the consumption, and raising the ice-melting efficiency.
Description
Affiliated technical field
The utility model relates to a kind of DC de-icing device that is applied to field of power.
Background technology
In the subtropical zone, winter, spring are dark and damp rainy, and the overhead transmission line icing all easily takes place for its weather, geographical conditions, threaten very big to safe operation of power system.Mainly be to cause ice to dodge or mechanical damage, and then influence the safe and stable operation of electrical network, in extreme weather even cause the electric network from collapsing accident, to the people's production, living to have constituted has a strong impact on transmission line.
At present, the deicing device that generally uses in field of power mainly is traditional deicing device of two kinds of forms.A kind of short circuit current deicing device, near the relevant transformer station co-operate the scheduling is in a certain some installing three-phase ice-melt shorting stub (but earth-free) of overhead transmission line, circuit is sent into ice melting current, after after a while, the circuit heating, thus the icing on the overhead transmission line is melted.Just provide big short circuit current heating wires to make the ice-out of lead with low voltage.Because the load of deicing device is an inductive load, so it is big to exchange the reactive loss of deicing device, efficient is low, and electric power energy is wasteful.
The another kind of deicing device of using at present is that heating ice-melt and reactive static are mended the SVC dual-purpose machine, end the type reactive power compensator and be called for short SVC (Static Var Compensator), SVC is a kind of parallel connection type static reacance power generator or absorber, its output is variable, with the special parameter in maintenance or the control electric power system.Under normal circumstances, this deicing device can be used as SVC network backbone point is formed the voltage support; Under the situation of icing,, form the power rectifier loop in the winter time, ice-melt is carried out in the alternating current circuit by the topological structure of modifier.What the Russia expert studied is the dual purpose silicon controlled rectifier that is used to heat ice-melt and reactive static benefit; The a kind of of Quebec, Canada research is used for the silicon controlled rectifier of removing ice of power transmission line based on HVDC (high-voltage direct-current) technology, and its ice-melt thought and Muscovite close all is to expand with electronic power rectification technology and no-power compensation function thereof.But this deicing device is owing to element series and parallel quantity in its power compensating system is more, and element grade selectable range is limited at present, and one-time investment is big, and it is big that through engineering approaches is implemented difficulty, to semiconductor element power requirement height, be not suitable for the present situation that power network distributes and invests.
The utility model content
Technical problem to be solved in the utility model provides a kind of DC power supply deicing device of transmission line wire.By implementing the utility model, can provide from ac power supply system (electrical network and generator) incoming transport power supply, become controllable voltage and current DC electricity, inject ice melting current to power network line via direct-flow distribution system by three-phase bridge silicon controlled rectifier mode, further energy-saving and cost-reducing
According to the utility model, above-mentioned technical problem realizes by the described technical characterictic of claim 1:
A kind of DC de-icing device, comprise main circuit and control device, main circuit comprises three bridge-type all controlled rectifier circuits, fly-wheel diode, signal supervisory instrument, main circuit one end is connected on the three-phase alternating current of electrical network or generator output, one end connects and links to each other with direct-flow distribution system, and described three bridge-type all controlled rectifier circuits are made up of 6 switching device V1-V6.Signal supervisory instrument is connected in three bridge-type all controlled rectifier circuit direct current outlet sides, is used for detecting in real time the voltage signal and the current signal of DC side; Control device links to each other with main circuit, is used for the switching device according to the real-time detected dc voltage of signal supervisory instrument and three bridge-type all controlled rectifier circuits of current signal triggering, realizes DC side voltage stabilizing, constant current.
Signal supervisory instrument comprises voltage check device and current sensing means, voltage check device is connected in parallel on three bridge-type all controlled rectifier circuit outlet side two ends, current sensing means is connected on three bridge-type all controlled rectifier circuit outlet side one ends, be used for detecting in real time DC side voltage signal and current signal; Control device links to each other with main circuit, is used for the voltage and current signal that records according to signal supervisory instrument and given voltage, current signal and compares, and calculates trigger pulse width in real time, the trigger switch device.
The active power utilance height of the described DC de-icing device of the utility model, it is big to have solved interchange deicing device reactive loss, efficient is low, the technical problem that electric power energy is wasteful, DC de-icing device is to exchange 1/6～1/8 of deicing device with exchanging the ice-melting device capacity of comparing, reduce molten ice capacity greatly, improve molten ice efficient, reduce interruption duration.Direct current ice-melting device Adjustable Output Voltage need not carried out impedance matching in addition, can satisfy the molten ice requirement of different length circuit.A movable DC ice-melting device can melt ice maker to all same electric pressure circuits and move flexibly, reduces investment outlay.The switching device quantity of Shi Yonging is few simultaneously, and cost is low.The problem that prior art exists has obtained effective solution.
Description of drawings
Fig. 1 is the electrical schematic diagram of the utility model DC de-icing device
Fig. 2 is a system, control circuit theory diagram of the present utility model
Embodiment
In embodiment, provided a kind of concrete application of the utility model.Below in conjunction with the drawings and specific embodiments the utility model is described further.
As a kind of exemplary embodiment of DC de-icing device described in the utility model, DC de-icing device comprises main circuit and control device, and main circuit comprises three bridge-type all controlled rectifier circuits, signal supervisory instrument DCPT, DCCT, sustained diode 1.The three-phase alternating current of electrical network or generator output enters three bridge-type all controlled rectifier circuits from A, B, 3 of C, by controlling the switching device V1-V6 of three bridge-type all controlled rectifier circuits, to reach full-controlled rectifier.The other end of three bridge-type all controlled rectifier circuits sustained diode 1 in parallel is avoided the rectifier bridge out-of-control phenomenon.Be connected with signal supervisory instrument DCPT, DCCT at end, be used for detecting in real time the voltage signal and the current signal of the direct current outlet side of three bridge-type all controlled rectifier circuits; Control device links to each other with main circuit, and the voltage and current signal that is used for recording according to signal supervisory instrument DCPT, DCCT calculates the pulse signal of control switch device V1-V6 in real time, with conducting or the shutoff of control switch device V1-V6.
Signal supervisory instrument comprises the direct current outlet side current sensing means DCCT of three bridge-type all controlled rectifier circuits, and voltage check device DCPT is used for finishing the detection of direct current outlet side voltage, electric current.In a kind of exemplary embodiment of the present utility model, checkout gear is current sensor and voltage sensor, and current sensor is used to detect direct current, and voltage sensor is used to detect direct voltage.
As further execution mode, DC de-icing device is according to the direct voltage feedback signal, the direct current feedback signal that detect in real time and set in advance given direct voltage, dc current signal compares, and determines opening or turn-offing of switching device V1-V6.These set in advance given direct voltage, dc current signal is determined according to the load actual conditions.Like this, DC de-icing device can be realized the purpose of voltage stabilizing, constant current.
As shown in Figure 2, provide a kind of embodiment of control device below, control device comprises: the impulse output circuit that power transformer, power supply stabilization circuit, synchronous processing circuit, signal processing circuit, digital demodulator, A/D change-over circuit, digital demodulator, digital trigger, pulse control logic circuit, six tunnel are isolated mutually.Wherein, synchronizing signal collects from the three-phase alternating current of electrical network or generator output, by synchronous processing circuit, makes the output pulse and the three-phase alternating current of switching device synchronous.Direct current outlet side voltage, current feedback signal are compared with given signal, send the A/D change-over circuit to become digital signal result, send the pulse control logic circuit through digital trigger, determine pulse duration, by pulse output current trigger switch device, reach given voltage and current requirement.By direct current outlet side voltage, current sensor direct voltage, electric current are fed back in real time,, reach dynamic equilibrium, realize the purpose of pressure-stabilizing constant flow with the continuous comparison process of given signal.
Though described execution mode of the present utility model in conjunction with the accompanying drawings, those of ordinary skill in the art can make various distortion or modification within the scope of the appended claims.The utility model is not limited to above-mentioned preferred forms, and other any identical with the utility model or akin products that anyone draws under the utility model enlightenment all drop in the protection range of the present utility model.
Claims (3)
1. DC de-icing device, this deicing device comprises main circuit and control device, it is characterized in that: main circuit comprises three bridge-type all controlled rectifier circuits, fly-wheel diode (D1), signal supervisory instrument (DCPT, DCCT), main circuit one end is connected on the three-phase alternating current of electrical network or generator output, and an end connects and links to each other with direct-flow distribution system
Three bridge-type all controlled rectifier circuits are made up of 6 switching devices (V1-V6),
Fly-wheel diode (D1) is parallel to three bridge-type all controlled rectifier circuit direct current outlet sides;
(DCPT DCCT) is connected in three bridge-type all controlled rectifier circuit direct current outlet sides to signal supervisory instrument, is used for detecting in real time the voltage signal and the current signal of DC side;
Control device links to each other with main circuit, is used for the switching device (V1-V6) according to the real-time detected dc voltage of signal supervisory instrument and three bridge-type all controlled rectifier circuits of current signal triggering, realizes DC side voltage stabilizing, constant current.
2. a kind of DC de-icing device according to claim 1 is characterized in that: described signal supervisory instrument comprises current sensor and voltage sensor.
3. a kind of DC de-icing device according to claim 1 and 2, it is characterized in that: described control device comprises power transformer, power supply stabilization circuit, synchronous processing circuit, signal processing circuit, the numeral demodulator, the A/D change-over circuit, the numeral demodulator, digital trigger, the pulse control logic circuit, six tunnel impulse output circuits of isolating mutually, described signal processing circuit links to each other with the A/D change-over circuit, described A/D change-over circuit links to each other with digital trigger, the output of digital trigger links to each other with the input of pulse control logic circuit, the pulse control logic circuit is determined pulse duration, exports the trigger impulse of six tunnel switching devices of isolating mutually by impulse output circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008200526816U CN201174564Y (en) | 2008-03-28 | 2008-03-28 | Direct-current ice melting apparatus |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008200526816U CN201174564Y (en) | 2008-03-28 | 2008-03-28 | Direct-current ice melting apparatus |
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| Publication Number | Publication Date |
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| CN201174564Y true CN201174564Y (en) | 2008-12-31 |
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| Application Number | Title | Priority Date | Filing Date |
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| CNU2008200526816U Expired - Lifetime CN201174564Y (en) | 2008-03-28 | 2008-03-28 | Direct-current ice melting apparatus |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103746327A (en) * | 2013-12-18 | 2014-04-23 | 广西大学 | 10KV station-used type DC ice melting device |
| CN105391319A (en) * | 2015-10-19 | 2016-03-09 | 株洲变流技术国家工程研究中心有限公司 | High-voltage cascade thyristor rectification circuit photoelectric triggering system and high-voltage cascade thyristor rectification circuit photoelectric triggering method |
| CN107395034A (en) * | 2017-09-09 | 2017-11-24 | 孙崇山 | From commutation rectification circuit and idle method for transformation |
| CN108900101A (en) * | 2018-09-03 | 2018-11-27 | 国网湖北省电力有限公司宜昌供电公司 | A kind of switchgear cowling panel of included defencive function |
-
2008
- 2008-03-28 CN CNU2008200526816U patent/CN201174564Y/en not_active Expired - Lifetime
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103746327A (en) * | 2013-12-18 | 2014-04-23 | 广西大学 | 10KV station-used type DC ice melting device |
| CN103746327B (en) * | 2013-12-18 | 2016-10-05 | 广西宏湖水利电业科技发展有限公司 | Formula DC de-icing device is used at a kind of 10KV station |
| CN105391319A (en) * | 2015-10-19 | 2016-03-09 | 株洲变流技术国家工程研究中心有限公司 | High-voltage cascade thyristor rectification circuit photoelectric triggering system and high-voltage cascade thyristor rectification circuit photoelectric triggering method |
| CN107395034A (en) * | 2017-09-09 | 2017-11-24 | 孙崇山 | From commutation rectification circuit and idle method for transformation |
| CN108900101A (en) * | 2018-09-03 | 2018-11-27 | 国网湖北省电力有限公司宜昌供电公司 | A kind of switchgear cowling panel of included defencive function |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20081231 |
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| CX01 | Expiry of patent term |