CN100415098C - Arc suppression coil damped resistor thyristor protection device - Google Patents
Arc suppression coil damped resistor thyristor protection device Download PDFInfo
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- CN100415098C CN100415098C CNB2005100282047A CN200510028204A CN100415098C CN 100415098 C CN100415098 C CN 100415098C CN B2005100282047 A CNB2005100282047 A CN B2005100282047A CN 200510028204 A CN200510028204 A CN 200510028204A CN 100415098 C CN100415098 C CN 100415098C
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Abstract
The present invention relates to a thyristor protection device for damping resistors of arc suppression coils, which is used for the technical field of electricity and comprises a primary protection thyristor T1, a secondary protection thyristor T2, trigger current control resistors R1 to R4, a current transformer TA and a damping resistor R. The present invention is characterized in that the damping resistor R is connected between the end X of the arc suppression coil and the ground; the primary protection thyristor T1 is connected in parallel with both ends of the damping resistor R; the trigger current control resistors R1 and R2 are connected with the trigger end of the primary protection thyristor T1 and both ends of the damping resistor R; the secondary protection resistor controlled silicon T2 is connected in parallel with both ends of the damping resistor R; the trigger current control resistors R3 and R4 are connected with the trigger end of the secondary protection thyristor T2 and both ends of the damping resistor R; the current transformer TA is connected in series to the damping resistor R. The present invention has high moving speed and no mechanical move, dose not need to induce voltage so as to completely isolate high voltage and low voltage, has great competitive advantage in both reliability and performance/price ratio, and has high application value.
Description
Technical field
The present invention relates to a kind of device of technical field of electricity, specifically is a kind of arc suppression coil damped resistor thyristor protection device.
Background technology
The damping resistance of arc suppression coil system plays the effect of restriction series resonance at present; damping resistance must be connected on and play damping action in the loop when electrical network normally moves; when singlephase earth fault takes place; damping resistance must be protected by short circuit; otherwise not only increased the ground connection residual flow; and since little being burnt of through-current capability of damping resistance cause the accident, so the protection of damping resistance plays an important role for the reliability service of electrical network.
Traditional damping resistance resist technology is to protect by contactor or vacuum switch; when singlephase earth fault takes place; by the rising trigger protection action of neutral point voltage or mid point electric current, control contactor or vacuum switch action are with the damping resistance short circuit.
Literature search to prior art is found, publication is at " nationwide integrated power grid earthing mode and technical seminar collection of thesis " " introducing a kind of from motion tracking ground compensation and earthing wire-selecting complexes " literary composition in May, 2005, point out in this article that " the resistance short-circuit device adopts two cover individual control loops; a cover is the alternating current 220V operation, and a cover is direct current 220V (or 110V) operation.Shorting switch adopts two EVS-160-630/11 type vacuum contactors, and 1 is alternating current operation, and 1 is dc operation; all be loaded in the resistance box "; because these traditional protective devices all are the mechanical action protections, there was a mechanical failure easily makes that protection can not correct operation, causes the accident.The contactor of these protection usefulness or vacuum switch all need to exchange in addition or dc source control, just can not protect in case the power supply powerup issue takes place, and reliability is relatively poor.And the traditional protection device is because the existence of power supply power supply makes damping resistance case inner high voltage part and low-pressure section not accomplish to isolate, in case protection can not in time be moved, the high pressure string will lead to bigger accident to mains side.
Summary of the invention
The objective of the invention is to overcome the deficiencies in the prior art; a kind of arc suppression coil damped resistor thyristor protection device is provided, makes its protection speed soon, not need power supply also not need control, by start the protection action from triggering mode; do not have mechanical part, reliability is high.The present invention utilizes controllable silicon that arc suppression coil damped resistor is protected, and the voltage of damping resistance raise and triggers the controllable silicon conducting that is connected in parallel on the damping resistance and carry out divided current when this guard method utilized system's generation singlephase earth fault.
The present invention is achieved by the following technical solutions, the present invention includes: first order protection controllable silicon T1, second level protection controllable silicon T2, trigger current controlling resistance R1～R4, current transformer TA, damping resistance R.Damping resistance R one end links to each other with the terminal X of arc suppression coil, and the other end links to each other with current transformer TA one end, the other end ground connection of current transformer TA; First order protection controllable silicon T1 is connected in parallel on damping resistance R two ends, the end of the first trigger current controlling resistance R1 links to each other with the end that damping resistance R is connected to arc suppression coil, the other end links to each other with first trigger end of first order protection controllable silicon T1, the end of the second trigger current controlling resistance R2 links to each other with the end that is connected to current transformer TA of damping resistance R, and the other end links to each other with second trigger end of first order protection controllable silicon T1; Second level protection controllable silicon T2 is connected in parallel on the two ends of damping resistance R summation current transformer TA, the end of the 3rd trigger current controlling resistance R3 links to each other with the end that damping resistance R is connected to arc suppression coil, the other end links to each other with first trigger end of second level protection controllable silicon T2, the end of the 4th trigger current controlling resistance R4 links to each other with the earth terminal of current transformer TA, and the other end links to each other with second trigger end of second level protection controllable silicon T2; Wherein the arc suppression coil rated current is depended in the selection of first order protection controllable silicon T1, second level protection controllable silicon T2; setting valve U1, U2 and the silicon controlled trigger current Ik of the starting resistor at damping resistance R two ends depended in the selection of first trigger current controlling resistance R1～R4; the first trigger current controlling resistance R1=R2=U1/Ik wherein; R3=R4=U2/Ik is as second level protection U2＞U1.
Described controllable silicon T1 and T2 can be that two one-way SCR inverse parallel compositions or bidirectional triode thyristor are formed.
Described trigger current controlling resistance R1～R4 can be a piezo-resistance also, is used for control and triggers the scr promoter electric current.
Described second level protection controllable silicon T2 perhaps is connected in parallel on the two ends after damping resistance R summation current transformer TA connects.
Described trigger current controlling resistance R3, R4 perhaps are connected the two ends after controllable silicon T2 trigger end and damping resistance R series current transformer TA are protected in the second level.
Described current transformer TA is used to detect electric current and indication first order controllable silicon T1 protection fault, and failure alarm signal is provided.
The present invention adopts the one-level silicon controlled rectifier protecting or the two-stage stand-by protection of arc suppression coil damped resistor; do not need the external world that any power source is provided; utilizing the rising of damping resistance both end voltage when electric network single-phase earth fault to carry out self-starting triggers; and two different protection setting valves have been determined in the selection that triggers resistance; start the second level silicon controlled rectifier protecting action when first order silicon controlled rectifier protecting is broken down at once, and provide failure alarm signal by the current transformer TA that is connected on the damping resistance.Compare with traditional arc suppression coil damped resistor contactor protection, not only quick action does not have mechanical action; and do not need voltage to introduce; accomplish that high and low pressure isolates fully, reliability and cost performance all have bigger competitive advantage, have high using value.The present invention is used for arc suppression coil damped resistor protection or and traditional Machine guarding merging use separately.
Description of drawings
Fig. 1 is a structural representation of the present invention
Embodiment
As shown in Figure 1, the present invention includes: first order protection controllable silicon T1, second level protection controllable silicon T2, four trigger current controlling resistance R1～R4, current transformer TA, damping resistance R.Damping resistance R one end links to each other with the terminal X of arc suppression coil, and the other end links to each other with current transformer TA one end, the other end ground connection of current transformer TA; First order protection controllable silicon T1 is connected in parallel on damping resistance R two ends, the end of the first trigger current controlling resistance R1 links to each other with the end that damping resistance R is connected to arc suppression coil, the other end links to each other with first trigger end of first order protection controllable silicon T1, the end of the second trigger current controlling resistance R2 links to each other with the end that is connected to current transformer TA of damping resistance R, and the other end links to each other with second trigger end of first order protection controllable silicon T1; Second level protection controllable silicon T2 is connected in parallel on the two ends of damping resistance R summation current transformer TA; the end of the 3rd trigger current controlling resistance R3 links to each other with the end that damping resistance R is connected to arc suppression coil; the other end links to each other with first trigger end of second level protection controllable silicon T2; the end of the 4th trigger current controlling resistance R4 links to each other with the earth terminal of current transformer TA, and the other end links to each other with second trigger end of second level protection controllable silicon T2.
Described controllable silicon T1 and T2 can be that two one-way SCR inverse parallel compositions or bidirectional triode thyristor are formed.Described trigger current controlling resistance R1～R4 can be a piezo-resistance also, is used for control and triggers the scr promoter electric current.Described second level protection controllable silicon T2 perhaps is connected in parallel on the two ends after damping resistance R summation current transformer TA connects.Described trigger current controlling resistance R3, R4 perhaps are connected the two ends after controllable silicon T2 trigger end and damping resistance R series current transformer TA are protected in the second level.Described current transformer TA is used to detect electric current and indication first order controllable silicon T1 protection fault, and failure alarm signal is provided.
The arc suppression coil rated current is depended in the selection of controllable silicon T1 and T2, and for example for the arc suppression coil of 300kVA/10kV, controllable silicon can be selected MCC95-16; Setting valve U1, U2 and the silicon controlled trigger current Ik of the starting resistor at damping resistance R two ends depended in the selection of controlling resistance R1～R4, controlling resistance R1=R2=U1/Ik wherein, and R3=R4=U2/Ik is as second level protection U2＞U1.Ordinary circumstance U1 and U2 are between 100V～1000V, and R1～R4 is scope between 2K Ω～50K Ω.Generally between 10～640 Ω, current transformer TA and arc suppression coil rated current coupling are generally 50: 5～200: 5 scopes for damping resistance R in addition.
When electrical network normally moves; because neutral point voltage is lower; the electric current that damping resistance flows through is less; the voltage drop Ur that produces at the damping resistance two ends is less; silicon controlled trigger current is approximately equal to Ur/R1; adjust and be not enough to trigger the controllable silicon conducting when this electric current normally moves in system; damping resistance was connected on and played damping action in the loop this moment; when singlephase earth fault takes place; neutral point voltage is higher; selected triggering resistance R 1; R2 makes can trigger first order controllable silicon T1 conducting when setting valve U1; damping resistance is by the protection of controllable silicon T1 short circuit, and the controllable silicon responsiveness is far above the mechanical action speed of contactor protection, and this invention is ingenious to utilize the voltage rising of damping resistance self that trigger voltage is provided; do not need to introduce from transformer station's power supply, security of system is reliable.Owing to introduce without any power supply, therefore and the contactor protection ratio, really accomplish the high and low pressure isolation, stopped the hidden danger that causes the accident.In addition; the present invention also has a cover stand-by protection; protection can not be moved if certain reason makes first order controllable silicon T1; at this moment Xuan Ding triggering resistance R 3, R4 makes that triggering second level controllable silicon T2 when setting valve U2 carries out stand-by protection; simultaneously since second level protection also simultaneously short circuit current transformer TA; current transformer TA does not detect electric current; to provide signal for first order silicon controlled rectifier protecting fault alarm; second level controllable silicon T2 also protects damping resistance simultaneously, and system still can ensure reliability service.
Claims (8)
1. arc suppression coil damped resistor thyristor protection device, comprise: current transformer (TA), damping resistance (R), it is characterized in that, also comprise: first order protection controllable silicon (T1), second level protection controllable silicon (T2), four trigger current controlling resistances (R1～R4), damping resistance (R) end links to each other with the end (X) of arc suppression coil, the other end links to each other the other end ground connection of current transformer (TA) with current transformer (TA) end; First order protection controllable silicon (T1) is connected in parallel on damping resistance (R) two ends, one end of the first trigger current controlling resistance (R1) links to each other with the end that damping resistance (R) is connected to arc suppression coil, the other end links to each other with first trigger end of first order protection controllable silicon (T1), one end of the second trigger current controlling resistance (R2) links to each other with an end that is connected to current transformer (TA) of damping resistance (R), and the other end links to each other with second trigger end of first order protection controllable silicon (T1); Second level protection controllable silicon (T2) is connected in parallel on the two ends of damping resistance (R) summation current transformer (TA), one end of the 3rd trigger current controlling resistance (R3) links to each other with the end that damping resistance (R) is connected to arc suppression coil, the other end links to each other with first trigger end of second level protection controllable silicon (T2), one end of the 4th trigger current controlling resistance (R4) links to each other with the earth terminal of current transformer (TA), and the other end links to each other with second trigger end of second level protection controllable silicon (T2); Wherein the arc suppression coil rated current is depended in the selection of first order protection controllable silicon (T1), second level protection controllable silicon (T2); (setting valve U1, U2 and the silicon controlled trigger current Ik of the starting resistor at damping resistance (R) two ends depended in R1～selection R4) to the first trigger current controlling resistance; the first trigger current controlling resistance R1=R2=U1/Ik wherein; R3=R4=U2/Ik is as second level protection U2＞U1.
2. arc suppression coil damped resistor thyristor protection device according to claim 1 is characterized in that described U1 and U2 are between 100V～1000V.
3. arc suppression coil damped resistor thyristor protection device according to claim 1 is characterized in that, and described four trigger current controlling resistances (R1～R4), scope between 2K Ω～50K Ω.
4. according to claim 1 or 3 described arc suppression coil damped resistor thyristor protection devices, it is characterized in that described four trigger current controlling resistances (R1～R4), be used for control and trigger the scr promoter electric current.
5. arc suppression coil damped resistor thyristor protection device according to claim 4 is characterized in that, (R1～R4) adopts piezo-resistance to described four trigger current controlling resistances.
6. arc suppression coil damped resistor thyristor protection device according to claim 1 is characterized in that, damping resistance (R) is between 10～640 Ω.
7. arc suppression coil damped resistor thyristor protection device according to claim 1 is characterized in that, current transformer (TA) and arc suppression coil rated current coupling were 50: 5～200: 5 scopes.
8. arc suppression coil damped resistor thyristor protection device according to claim 1; it is characterized in that; described first order protection controllable silicon (T1), second level protection controllable silicon (T2) are that two one-way SCR inverse parallel compositions or bidirectional triode thyristor are formed.
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| Application Number | Priority Date | Filing Date | Title |
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| CNB2005100282047A CN100415098C (en) | 2005-07-28 | 2005-07-28 | Arc suppression coil damped resistor thyristor protection device |
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| Application Number | Priority Date | Filing Date | Title |
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| CNB2005100282047A CN100415098C (en) | 2005-07-28 | 2005-07-28 | Arc suppression coil damped resistor thyristor protection device |
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| CN1717996A CN1717996A (en) | 2006-01-11 |
| CN100415098C true CN100415098C (en) | 2008-09-03 |
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| CNB2005100282047A Active CN100415098C (en) | 2005-07-28 | 2005-07-28 | Arc suppression coil damped resistor thyristor protection device |
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Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102946096A (en) * | 2012-11-21 | 2013-02-27 | 国电南瑞科技股份有限公司 | Series damping resistor control method applied to arc suppression coil grounding system |
| CN103248037B (en) * | 2013-05-10 | 2016-04-27 | 国家电网公司 | The power distribution network damping circuit parameter tuning method of neutral by arc extinction coil grounding |
| CN105071370A (en) * | 2015-07-21 | 2015-11-18 | 重庆市亚东亚集团变压器有限公司 | Quick self-triggering damping resistor protection device |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5510946A (en) * | 1994-09-19 | 1996-04-23 | Franklin; Frederick F. | Circuit breaker protection against "arc short circuit" hazards |
| CN2387653Y (en) * | 1999-07-29 | 2000-07-12 | 上海思源电气有限公司 | Arc-eliminating coil microcomputer auto-tuning and earthing line-selecting device |
-
2005
- 2005-07-28 CN CNB2005100282047A patent/CN100415098C/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5510946A (en) * | 1994-09-19 | 1996-04-23 | Franklin; Frederick F. | Circuit breaker protection against "arc short circuit" hazards |
| CN2387653Y (en) * | 1999-07-29 | 2000-07-12 | 上海思源电气有限公司 | Arc-eliminating coil microcomputer auto-tuning and earthing line-selecting device |
Non-Patent Citations (4)
| Title |
|---|
| 配消弧线圈的阻尼电阻装置. 江秀臣，李锋，韩振动，马云汉.高压电器，第2期. 1999 |
| 配消弧线圈的阻尼电阻装置. 江秀臣，李锋，韩振动，马云汉.高压电器，第2期. 1999 * |
| 阻尼电阻在消弧线圈回路中的作用及存在的问题和改进措施. 黄杰，刘欣欣.地质找矿论丛，第18卷. 2003 |
| 阻尼电阻在消弧线圈回路中的作用及存在的问题和改进措施. 黄杰，刘欣欣.地质找矿论丛，第18卷. 2003 * |
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| CN1717996A (en) | 2006-01-11 |
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Effective date of registration: 20230309 Address after: 201108, No. 4399 Jin Du Road, Shanghai, Minhang District Patentee after: SIEYUAN ELECTRIC Co.,Ltd. Patentee after: Shanghai Siyuan Photoelectric Co.,Ltd. Address before: 201108, No. 4399 Jin Du Road, Shanghai, Minhang District Patentee before: Shanghai Siyuan Electric Co.,Ltd. |