CN203165821U - Series capacitor type high-voltage direct current circuit breaker - Google Patents
Series capacitor type high-voltage direct current circuit breaker Download PDFInfo
- Publication number
- CN203165821U CN203165821U CN 201320025780 CN201320025780U CN203165821U CN 203165821 U CN203165821 U CN 203165821U CN 201320025780 CN201320025780 CN 201320025780 CN 201320025780 U CN201320025780 U CN 201320025780U CN 203165821 U CN203165821 U CN 203165821U
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- circuit breaker
- direct current
- type high
- current circuit
- voltage direct
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Abstract
The utility model relates to an electric power system circuit breaker and specifically relates to a series capacitor type high-voltage direct current circuit breaker which comprises direct current circuit breaker units which are connected in series, wherein each direct current circuit breaker unit comprises a change-over switch, a switching circuit and an energy consumption device which are connected in parallel. The series capacitor type high-voltage direct current circuit breaker is characterized in that a mechanical switch is adopted for the change-over switch, a resistance capacitance branch circuit is adopted for the switching circuit, and a lightning arrester is adopted for the energy consumption device. The series capacitor type high-voltage direct current circuit breaker is characterized in that an electric arc-free property of the mechanical switch is realized, arc-free breaking operation is realized, energy is released through utilization of the lightning arrester, electric arcs can be quickly extinguished, and a failure current can be cut off.
Description
Technical field
The utility model relates to the electric power system circuit breaker, is specifically related to a kind of condenser type high voltage direct current circuit breaker that seals in.
Background technology
The high voltage direct current circuit breaker has application prospect widely in based on the multiterminal flexible DC power transmission of IGBT and direct current network system.Traditional AC circuit breaker mainly is to use two current zeros of alternating current in each cycle to come extinguish arcs, thereby drop-out current, and do not have the natural zero-crossing point in direct current system, so how fast the difficulty of high voltage direct current circuit breaker drop-out current is extinguish arcs.Dc circuit breaker generally is made up of change over switch, change-over circuit and energy consumer three parts, as shown in Figure 1.It mainly cut-offs sequential: during separating brake, electric current is transformed into change-over circuit from change over switch earlier, changes the energy consumer dissipation energy then over to the residual amount of energy in the dissipation direct current system, and DC loop is disconnected.
And existing dc circuit breaker adopts electric arc negative resistance charactertistic and the auxiliary branch capacitor and inductor resonance of circuit breaker, thereby make zero crossing at mechanical switch, realize disjunction, and existing dc circuit breaker has the resonance branch road, electric arc is arranged, and the auxiliary branch capacitor and inductor is easy to generate resonance.
The utility model content
At the deficiencies in the prior art, the utility model provides a kind of condenser type high voltage direct current circuit breaker that seals in, and the utility model realizes that mechanical switch does not play electric arc, the realization non-arc breaking is disconnected, use lightning arrester that energy is released, thereby realize quick extinguish arcs, the disengagement failure electric current.
The purpose of this utility model is to adopt following technical proposals to realize:
The utility model provides a kind of condenser type high voltage direct current circuit breaker that seals in, described circuit breaker comprises the dc circuit breaker unit of series connection, each described dc circuit breaker unit comprises change over switch, change-over circuit and energy consumer in parallel, it is characterized in that, described change over switch adopts mechanical switch; Described change-over circuit adopts the capacitance-resistance branch road, and described energy consumer adopts lightning arrester.
Wherein, described capacitance-resistance branch road comprises series capacitors and resistance; Described capacitor and resistance are connected in parallel on the mechanical switch two ends.
Wherein, described resistance is in parallel with diode, and described diode is for the protection of resistance.
Wherein, described energy consumer or employing adjustable resistance.
Wherein, the charging voltage at described capacitor two ends is lower than the arcing voltage between the mechanical switch fracture.
Compared with the prior art, the beneficial effect that reaches of the utility model is:
1, the utility model provides seals in condenser type high voltage direct current circuit breaker, can satisfy fast shut-off fault current demand, can realize that the non-arc breaking of mechanical switch is disconnected, simple to operation and complete function.
2, the utility model utilizes the speed of voltage on capacitor rising lower than mechanical switch medium recovery voltage speed all the time, thereby realize that mechanical switch does not play electric arc, the realization non-arc breaking is disconnected, and does not have resonant tank in this topology, has avoided auxiliary branch capacitor and inductor resonance.
3, topological structure of the present utility model designs two fractures, shortens each fracture stroke distances, and the circuit breaker responsiveness is doubled, thereby realizes quick extinguish arcs, the disengagement failure electric current.
4, the utility model provides, and to seal in condenser type high voltage direct current circuit breaker response speed fast, and topological structure is simple, saves cost.
Description of drawings
Fig. 1 is dc circuit breaker basic principle figure;
Fig. 2 be the utility model provide seal in condenser type high voltage direct current circuit breaker topology diagram;
Fig. 3 is the high voltage direct current circuit breaker control sequential chart that the utility model provides.
Embodiment
Below in conjunction with accompanying drawing embodiment of the present utility model is described in further detail.
The utility model provides a kind of and seals in condenser type high voltage direct current circuit breaker topological structure as shown in Figure 2, circuit breaker comprises the dc circuit breaker unit of series connection, each described dc circuit breaker unit comprises change over switch, change-over circuit and energy consumer in parallel, and change over switch of the present utility model adopts mechanical switch; Change-over circuit adopts the capacitance-resistance branch road, and the capacitance-resistance branch road comprises series capacitors and resistance; Capacitor and resistance are connected in parallel on the mechanical switch two ends, and resistance is in parallel with diode.Energy consumer adopts lightning arrester or adjustable resistance; The high voltage direct current circuit breaker is connected with control circuit, and control circuit realizes that for shutoff, the control capacitance-resistance branch road of control mechanical switch fault current shifts, and the energy of inhibition mechanical switch both end voltage and control lightning arrester is released.The electromagnetic pulse that mechanical switch sends by control circuit realizes turning on and off.Control circuit adopts controller.
The effect that is connected in parallel on the high-voltage capacitor at mechanical switch two ends in this structure is when mechanical switch disconnects, and makes the mechanical switch both end voltage be lower than its corresponding arcing voltage of opening distance all the time, thereby the no arc of realizing mechanical switch disconnects.The selection of capacitor will be considered fracture voltage that mechanical switch can bear and the peak value of system failure electric current simultaneously, capacitor is selected too small, then can not satisfy voltage request, selects excessive, then can not satisfy current requirements, so the selection of capacitor needs balanced voltage and electric current.Occurrence need obtain according to dc circuit breaker institute power application system value.The effect of resistance is the resonance that suppresses behind the mechanical switch separating brake between electric capacity and the system reactance.The effect of diode be the fault current transfer during to the capacitance-resistance branch road short-circuit resistance and eliminate electric capacity and system reactance between vibration.The effect in lightning arrester loop is the limiting circuit breaker both end voltage.
The utility model also provides the control method that seals in condenser type high voltage direct current circuit breaker, specifically comprises the steps:
When 1, fault took place, mechanical switch detected fault current, and T1 moves constantly, shifted fault current to the capacitance-resistance loop.
2, fault current is transferred to the capacitance-resistance branch road, and be capacitor charging in the capacitance-resistance branch road, control circuit control mechanical switch disconnects, at mechanical switch before thorough opening time, be that T2 is before the moment, the charging voltage at capacitor two ends is lower than the arcing voltage between the mechanical switch fracture all the time, thereby realizes that mechanical switch does not have arc and disconnects.
3, when capacitor voltage at both ends reaches the lightning arrester operation voltage, the T3 moment, the action of control circuit control lightning arrester, energy is released from the lightning arrester branch road.High voltage direct current circuit breaker control sequential as shown in Figure 3.
Back 1ms takes place in fault in described T1, and T2 and T1 differ 2ms, and T3 and T2 differ 1ms.
Whole process has realized that mechanical switch does not have arc disconnection and fault current excision fast, reaches the application target of high voltage direct current circuit breaker.
Should be noted that at last: above embodiment is only in order to illustrate that the technical solution of the utility model is not intended to limit, although with reference to above-described embodiment the utility model is had been described in detail, those of ordinary skill in the field are to be understood that: still can make amendment or be equal to replacement embodiment of the present utility model, and do not break away from any modification of the utility model spirit and scope or be equal to replacement, it all should be encompassed in the middle of the claim scope of the present utility model
Claims (5)
1. one kind seals in condenser type high voltage direct current circuit breaker, described circuit breaker comprises the dc circuit breaker unit of series connection, each described dc circuit breaker unit comprises change over switch, change-over circuit and energy consumer in parallel, it is characterized in that, described change over switch adopts mechanical switch; Described change-over circuit adopts the capacitance-resistance branch road, and described energy consumer adopts lightning arrester.
2. the condenser type high voltage direct current circuit breaker that seals in as claimed in claim 1 is characterized in that described capacitance-resistance branch road comprises series capacitors and resistance; Described capacitor and resistance are connected in parallel on the mechanical switch two ends.
3. the condenser type high voltage direct current circuit breaker that seals in as claimed in claim 2 is characterized in that described resistance is in parallel with diode.
4. the condenser type high voltage direct current circuit breaker that seals in as claimed in claim 1 is characterized in that, described energy consumer adopts adjustable resistance.
5. the condenser type high voltage direct current circuit breaker that seals in as claimed in claim 2 is characterized in that the charging voltage at described capacitor two ends is lower than the arcing voltage between the mechanical switch fracture.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320025780 CN203165821U (en) | 2013-01-17 | 2013-01-17 | Series capacitor type high-voltage direct current circuit breaker |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320025780 CN203165821U (en) | 2013-01-17 | 2013-01-17 | Series capacitor type high-voltage direct current circuit breaker |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203165821U true CN203165821U (en) | 2013-08-28 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201320025780 Expired - Lifetime CN203165821U (en) | 2013-01-17 | 2013-01-17 | Series capacitor type high-voltage direct current circuit breaker |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203165821U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103632895A (en) * | 2013-12-04 | 2014-03-12 | 中国科学院电工研究所 | Direct-current circuit breaker |
| CN107947132A (en) * | 2017-11-30 | 2018-04-20 | 天津大学 | It is a kind of that there is micro- loss combined machine formula dc circuit breaker of reclosing |
| CN108233325A (en) * | 2016-12-14 | 2018-06-29 | 中国航空工业集团公司西安航空计算技术研究所 | A kind of airborne electromagnetic valve supply current sampling protection circuit |
| CN108807030A (en) * | 2017-04-27 | 2018-11-13 | 南京南瑞继保电气有限公司 | A kind of high-voltage quick switch |
-
2013
- 2013-01-17 CN CN 201320025780 patent/CN203165821U/en not_active Expired - Lifetime
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103632895A (en) * | 2013-12-04 | 2014-03-12 | 中国科学院电工研究所 | Direct-current circuit breaker |
| CN103632895B (en) * | 2013-12-04 | 2016-01-20 | 中国科学院电工研究所 | A kind of DC circuit breaker |
| CN108233325A (en) * | 2016-12-14 | 2018-06-29 | 中国航空工业集团公司西安航空计算技术研究所 | A kind of airborne electromagnetic valve supply current sampling protection circuit |
| CN108233325B (en) * | 2016-12-14 | 2019-11-15 | 中国航空工业集团公司西安航空计算技术研究所 | A kind of airborne electromagnetic valve supply current sampling protection circuit |
| CN108807030A (en) * | 2017-04-27 | 2018-11-13 | 南京南瑞继保电气有限公司 | A kind of high-voltage quick switch |
| CN107947132A (en) * | 2017-11-30 | 2018-04-20 | 天津大学 | It is a kind of that there is micro- loss combined machine formula dc circuit breaker of reclosing |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20170605 Address after: 102200 Beijing city Changping District South Shao Zhen Nan Road No. 16 Co-patentee after: State Grid Corporation of China Patentee after: CHINA-EPRI ELECTRIC POWER ENGINEERING Co.,Ltd. Address before: 102211 Beijing city Changping District Xiaotangshan town big East Village Road No. 270 (future technology city) Co-patentee before: CHINA-EPRI ELECTRIC POWER ENGINEERING Co.,Ltd. Patentee before: STATE GRID SMART GRID Research Institute Co-patentee before: State Grid Corporation of China |
|
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20130828 |