CN202282741U - Arc-growing type plasma direct current power supply system - Google Patents
Arc-growing type plasma direct current power supply system Download PDFInfo
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- CN202282741U CN202282741U CN2011203722389U CN201120372238U CN202282741U CN 202282741 U CN202282741 U CN 202282741U CN 2011203722389 U CN2011203722389 U CN 2011203722389U CN 201120372238 U CN201120372238 U CN 201120372238U CN 202282741 U CN202282741 U CN 202282741U
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Abstract
The utility model discloses an arc-growing type plasma direct current power supply system, which comprises a boosted transformer, a contactor and a direct current speed governor. After an alternating current power supply is boosted through the boosted transformer, the alternating current power supply is connected with load through the contactor and the direct current speed governor sequentially. The arc-growing type plasma direct current power supply system adopts the boosted transformer, working voltage of a plasma generator is increased, the length and temperature of an arc are both increased remarkably, and after the changes, no-load voltage can reach 510 V which can not be achieved through the existing plasma power supply system. In addition, the arc-growing type plasma direct current power supply system adopts the direct current speed governor to provide a power supply for plasma, and a PI regulator is adopted, therefore static error-free of speed and a given value can be achieved. When disturbance on power grid overload change exists, fast adjusting and stabilizing of current can be achieved. The arc-growing type plasma direct current power supply system can have current limit protection effect on overvoltage and load current, and safety of the system is guaranteed.
Description
Technical field
The utility model relates to a kind of DC power supply, is applied to pulverized-coal fired boiler.
Background technology
At present, general sparking mode was when coal burning boiler of power station started: light oil burner with igniter earlier and heat up, boost, when each relevant parameter of boiler reaches the requirement of throwing powder, start pulverized coal preparation system and coal burner, realize load carrying; When boiler load is reduced to about 50%, also must throw the steady combustion of oil and could guarantee that boiler normally moves, according to statistics; Electric power system is used for utility boiler igniting, steady combustion every year, combustion-supportingly reaches nearly ten million ton with innage; Account for 15% of the total amount of fuel in the whole nation, be worth tens billion of units, consumed the great amount of fuel oil resource.
Present domestic plasma ignition system has all obtained application in a lot of power plant; The power-supply system of using all is made up of isolating transformer, silicon controlled rectifier and reactor; Wherein isolating transformer does not possess boost function; Basically about 300V, the length of electric arc, temperature all do not reach maximum efficiency to isoionic operating voltage; The power electronic device of silicon controlled rectification power source is operated in power frequency, and corresponding speed is slow, and operating frequency is low, and loss is big, and the utilance of power supply is on the low side.
The utility model content
The utility model is to the deficiency of prior art, provides that a kind of response speed is fast, current forecasting control, high voltage, electric arc growth form plasma electric origin system that the power utilization rate is high.
For realizing above technical purpose, the utility model will be taked following technical scheme:
A kind of electric arc growth form plasma DC power system comprises step-up transformer, contactor, DC speed regulator and smoothing reactor; AC power links to each other with load through contactor, DC speed regulator, smoothing reactor after step-up transformer boosts successively.
Said DC speed regulator is the controllable silicon DC speed regulator, and this DC speed regulator is double circle structure, and the interior ring of said DC speed regulator is a current regulator, and its outer shroud then is a speed regulator; The output that is input as speed regulator of said current regulator; And speed regulator is connected with load through speed converter, and current regulator then is connected with rectification thyristor through power pack, and between current regulator and the rectification thyristor trigger is set; The negative pole of this rectification thyristor is connected with load through smoothing reactor, and the anodal of rectification thyristor directly is connected with load.
According to above technical scheme, can realize following beneficial effect:
1, traditional isolating transformer mainly prevents the influence of high order harmonic component, and prevents that plasma generator is charged, only plays the effect of isolation, and voltage does not change; The application adopts step-up transformer, improves the operating voltage of plasma generator, and the length of electric arc and temperature all have tangible enhancing, changes the back floating voltage and can reach 510V, and this is that present plasma electric origin system can't be accomplished.
2, the utility model adopts DC speed regulator to plasma power supply to be provided, and adopts pi regulator, can realize the static indifference of speed and set-point, and when line voltage overload variation had disturbance, the quick adjustment that can realize electric current was with stable.In overvoltage, also can at first stay protective effect on the other hand, guarantee the safety of system to load current.
Description of drawings
Fig. 1 is the system block diagram of the utility model;
Fig. 2 is the control principle block diagram of the utility model DC speed regulator.
Embodiment
Accompanying drawing discloses the structural representation of the related preferred embodiment of the utility model without limitation; Below will combine accompanying drawing that the technical scheme of the utility model at length is described.
As depicted in figs. 1 and 2; The described electric arc growth form of the utility model plasma DC power system; Comprise step-up transformer, contactor and DC speed regulator, AC power links to each other with load through contactor, DC speed regulator after step-up transformer boosts successively.Said DC speed regulator is the controllable silicon DC speed regulator, and this DC speed regulator is double circle structure, and the interior ring of said DC speed regulator is a current regulator, and its outer shroud then is a speed regulator; The output that is input as speed regulator of said direct current regulator; And speed regulator is connected with load through speed converter, and current regulator then is connected with rectification thyristor through power pack, and between current regulator and the rectification thyristor trigger is set; The negative pole of this rectification thyristor is connected with load through smoothing reactor, and the anodal of rectification thyristor directly is connected with load.
Therefore, the operation principle of the utility model is:
The control system of DC speed regulator is a double circle structure, and interior ring is a current regulator, and outer shroud is a speed regulator; Speed regulator is output as the input of direct current regulator, the last control load electric current of direct current regulator stable, and speed regulator adopts PI to regulate; Can realize the static receiver error of electric current and set-point, when line voltage had disturbance, the quick adjustment that can carry out the realization electric current was with stable; Therefore; When setting, let the saturated output of speed ring, i.e. the output of speed ring is maximum, and the output of given like this electric current loop is maximum; We are provided with the electric current restriction in electric current loop in order to limit output current, therefore regulate the output of electric current through the restriction of electric current.
The effect of smoothing reactor: the energy-storage function that utilizes inductance; Reduce load because the cutout zone that thyristor commutation causes; Improve the stability of load current, reactor also has the function of the pulsation of restriction direct current, restriction circulation and short circuit current climbing in addition.
Claims (2)
1. an electric arc growth form plasma DC power system is characterized in that: comprise step-up transformer, contactor, DC speed regulator and smoothing reactor; AC power links to each other with load through contactor, DC speed regulator, smoothing reactor after step-up transformer boosts successively.
2. according to the said electric arc growth form of claim 1 plasma DC power system; It is characterized in that: said DC speed regulator is the controllable silicon DC speed regulator; And this DC speed regulator is a double circle structure, and the interior ring of said DC speed regulator is a current regulator, and its outer shroud then is a speed regulator; The output that is input as speed regulator of said current regulator; And speed regulator is connected with load through speed converter, and current regulator then is connected with rectification thyristor through power pack, and between current regulator and the rectification thyristor trigger is set; The negative pole of this rectification thyristor is connected with load through smoothing reactor, and the positive and negative electrode of rectification thyristor directly is connected with load.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011203722389U CN202282741U (en) | 2011-09-28 | 2011-09-28 | Arc-growing type plasma direct current power supply system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011203722389U CN202282741U (en) | 2011-09-28 | 2011-09-28 | Arc-growing type plasma direct current power supply system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202282741U true CN202282741U (en) | 2012-06-20 |
Family
ID=46228892
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011203722389U Expired - Lifetime CN202282741U (en) | 2011-09-28 | 2011-09-28 | Arc-growing type plasma direct current power supply system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202282741U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102355144A (en) * | 2011-09-28 | 2012-02-15 | 南京创能电力科技开发有限公司 | Arc increase type plasma direct current power supply system |
-
2011
- 2011-09-28 CN CN2011203722389U patent/CN202282741U/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102355144A (en) * | 2011-09-28 | 2012-02-15 | 南京创能电力科技开发有限公司 | Arc increase type plasma direct current power supply system |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20120620 |
|
| CX01 | Expiry of patent term |