CN2424559Y - Device for fast regulating arc-extinguishing coil - Google Patents
Device for fast regulating arc-extinguishing coil Download PDFInfo
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- CN2424559Y CN2424559Y CN 00206677 CN00206677U CN2424559Y CN 2424559 Y CN2424559 Y CN 2424559Y CN 00206677 CN00206677 CN 00206677 CN 00206677 U CN00206677 U CN 00206677U CN 2424559 Y CN2424559 Y CN 2424559Y
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- arc suppression
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Abstract
The utility model relates to a device for fast regulating an arc-extinguishing coil, which is composed of an iron core magnetic circuit stacked by silicon steel sheets, a magnetic air gap, a primary winding L0, secondary windings L1 to L3, reversal parallelly-connected thyristors SCR1 to SCR3, a microcomputer control assembly, a zero-sequence voltage mutual inductor PT, a grounding transformer JB, etc., wherein, the iron core magnetic circuit can be made into a plurality of mutually independent magnetic circuit loops, the primary winding is wound in each magnetic circuit loop, the secondary windings are wound in corresponding magnetic circuit loops; one end of L0 is connected with a neutral point O of the grounding transformer JB, and the other end is grounded; L1 to L3 are respectively connected with the thyristors SCR1 to SCR3. The utility model can rapidly realize the sectionally continuous regulation of the inductance value of the arc-extinguishing coil so as to achieve the optimal compensation of single phase grounding capacitance and current of an electric network.
Description
The utility model relates to a kind of automatic compensation adjustment device of unbalanced earth fault capacitance current of neutral point of electric network small current neutral grounding system, belongs to the grounding technology field of arc suppression coil and arc suppression coil.
Disclosed automatic adjustment electric wire netting arc extinguishing coil device (CN2231454Y) in the prior art, it mainly detects loop, arc-suppression reactor L adjustment loop and system controlled by computer assembly by direct-to-ground capacitance and constitutes closed-loop control system, constantly the direct-to-ground capacitance value of neutral point through arc suppression coil earthing electric network detected by computer control, computer is adjusted the bidirectional triode thyristor trigger angle of connecting with arc suppression coil automatically, in the realization on a large scale arc suppression coil L is adjusted automatically continuously.Though the adjusting range of this device has increased, but also have the following disadvantages, because controllable silicon is directly connected with arc suppression coil, when controllable silicon is worked, in a power frequency period, the discontinuous current in the arc suppression coil, distortion is serious, can cause bigger harmonic current, harmonic current can flow through electrical network single-phase fault earth point and can not eliminate, and causes the electric arc of fault point to be difficult for extinguishing.In order to reduce the influence of harmonic current, this device is provided with harmonic filter, thereby the structure of this device is comparatively complicated, manufacturing cost is high.In addition, because controllable silicon directly is connected on the high-pressure side of electrical network, when single phase ground fault took place, neutral point displacement voltage was higher, and the impacting with high pressure greater than the phase voltage of electrical network will be born in the controllable silicon two ends of shutoff, and conventional controllable silicon can not satisfy requirement of withstand voltage.Owing to adopted additional direct-to-ground capacitance to detect the loop, thereby increased the complexity of device and the probability that breaks down.
The purpose of this utility model is to overcome above-mentioned the deficiencies in the prior art and provides a kind of harmonic current to disturb little quick adjustment arc suppression coil device.
The purpose of this utility model is realized by the following technical programs:
Quick adjustment arc suppression coil device, it is made up of isolating switch K, grounding transformer JB, current transformer CT, arc suppression coil (1), system controlled by computer assembly CP (2), zero sequential potential transformer PT (3) etc.Wherein, the iron circuit (4) that built up by silicon steel sheet of arc suppression coil (1), magnetic air gap (5), former limit winding L 0, secondary winding L 1～L3, reverse parallel connection controllable silicon SCR 1～SCR3 constitute.Grounding transformer JB inserts electrical network LA, LB, LC through isolating switch K, the neutral point O of grounding transformer JB links to each other with an end (6) of former limit winding L 0 through current transformer CT, the other end of L0 (7) ground connection, L1～L3 is in parallel with reverse correlation controllable silicon SCR 1～SCR3 respectively, system controlled by computer assembly (2) links to each other respectively with control end G1～G6, current transformer CT, the zero sequential potential transformer PT (3) of reverse parallel connection controllable silicon SCR 1～SCR3, and zero sequential potential transformer PT (3) links to each other with electrical network LA, LB, LC.Secondary winding L 1～L3 can be made up of one or more winding, iron circuit (4) can be made of one or more independent magnetic circuit loop, former limit winding L 0 is striden and is around in one or more magnetic circuit loop, and secondary winding L 1～L3 is in the loop of respective magnetic circuit.Isolated insulation between L1～L3 and the L0, the coil turn of secondary winding L 1～L3 are 1/2～1/50 of former limit winding L 0 coil turn.L1～L3 voltage at two ends separately is 1/2～1/50 of a L0 voltage, computer among the system controlled by computer assembly PC (2) constantly detects the direct-to-ground capacitance value of neutral point O through arc suppression coil (1) earthing electric network, and required equivalent electric sensibility reciprocal when required resonance compensation equivalent inductance value and electrical network normally move when calculating the electrical network single-phase earthing, can determine two groups of trigger angle of the reverse parallel connection controllable silicon SCR 1～SCR3 of three secondary winding L 1～L3 correspondences thus.When electrical network normally moves, when regulating reverse correlation controllable silicon SCR 1～SCR3 and working in corresponding one group of trigger angle, the equivalent electric sensibility reciprocal of arc suppression coil (1) is satisfied take off humorous degree requirement, thereby suppress the displacement voltage of neutral point of electric network.When electrical network generation single phase ground fault, when adjusting controllable silicon SCR 1～SCR3 works in another group trigger angle, can make the equivalent electric sensibility reciprocal resonance compensation ground capacity of arc suppression coil (1) and the electric current minimum of earth point, thereby the segmentation that reaches arc suppression coil (1) inductance value is regulated continuously, reaches the The optimal compensation of electrical network unbalanced earth fault capacitance current.
Below in conjunction with accompanying drawing the technical solution of the utility model is described in further detail.
Fig. 1 is the control circuit schematic diagram of the utility model three winding arc suppression coil devices.K among the figure is an isolating switch, and 2 is system controlled by computer assembly PC, and 3 is zero sequential potential transformer PT, and JB is a grounding transformer, and CT is a current transformer, and L0 is a former limit winding, and L1, L2 are the secondary winding.Secondary winding L 1, L2 are subjected to the control successively of controllable silicon SCR 1 and SCR2 respectively, the equivalent electric sensibility reciprocal segmentation of former limit winding L 0 is changed continuously, guaranteeing that the adjustable range of the inductance value of arc suppression coil (1) can reach more than 50% under the condition of harmonic current less than arc suppression coil maximum operating currenbt 5%.
Fig. 2 is the structural representation of the utility model three winding arc suppression coils.4 is iron circuit among the figure, and 5 is magnetic air gap, and L0 is a former limit winding, and L1, L2 are the secondary winding.In Fig. 2, secondary winding L 1, the selectable coil turn of L2 are 1/2～1/50 of former limit winding L 0 coil turn, when the voltage that controllable silicon SCR 1, SCR2 are born when turn-offing is reduced to 1/2～1/50 of former limit winding L 0 voltage, when electrical network was 10kV, the controllable silicon SCR 1 that secondary winding L 1, L2 link to each other, the voltage that bear at the SCR2 two ends were less than 1800V.
Fig. 3 is the control circuit schematic diagram of the utility model four winding arc suppression coil devices.K among the figure is an isolating switch, and JB is a grounding transformer, and CT is a current transformer, and L0 is a former limit winding.L1～L3 is the secondary winding, and G1～G6 is a control end.Secondary winding L 1～L3 is subjected to the control of reverse correlation controllable silicon SCR 1～SCR3 respectively, the equivalent electric sensibility reciprocal segmentation of former limit winding L 0 is regulated continuously, guaranteeing that the adjustable range of the inductance value of arc suppression coil (1) can reach more than 75% under the condition of harmonic current less than arc suppression coil maximum operating currenbt 5%.
Fig. 4 is the structural representation of the utility model four winding arc suppression coils.4 is iron circuit among the figure, and 5 is magnetic air gap, and L0 is a former limit winding, and L1～L3 is the secondary winding.In Fig. 4, the coil turn of secondary winding L 1～L3 is respectively 1/2～1/50 of former limit winding L 0 coil turn, the voltage that is born when controllable silicon SCR 1～SCR3 turn-offs is reduced to 1/2～1/50 of former limit winding L 0 voltage, when electrical network was 10 kilovolts, the voltage that controllable silicon SCR 1～SCR3 bears was less than 1800V.
Further specify operation principle of the present utility model below.
1. the detection of direct-to-ground capacitance.When electrical network normally moves, connect the silicon controlled trigger angle by arc suppression coil secondary winding L 1 or the L2 that changes among Fig. 1, current first harmonics component and voltage fundamental component in the former limit of the arc suppression coil winding L 0 before and after the measurement triggering angle changes can calculate the direct-to-ground capacitance value.
2. when electrical network normally moves, current first harmonics component and voltage fundamental component in the former limit of the arc suppression coil winding L 0 that measures by industrial computer, can calculate the humorous degree that takes off of the equivalent electric sensibility reciprocal of arc suppression coil and electrical network, control silicon controlled trigger angle changes takes off humorous degree the neutral point of electric network displacement voltage is remained within the scope that rules allow.
3. when electrical network generation single phase ground fault, regulate equivalent inductance and direct-to-ground capacitance generation resonance that the silicon controlled trigger angle makes arc suppression coil rapidly, the capacitive current of full remuneration earth point makes the electric current minimum of earth point, and electric arc can not be kept and extinguish.
4. after electric network single-phase earth fault disappears, regulate the silicon controlled trigger angle arc suppression coil equivalent electric sensibility reciprocal is changed, electrical network breaks away from resonance point, remains on bigger taking off in the humorous degree, and the neutral point of electric network displacement voltage is remained within the scope of rules permission.
The fast regulating arc-extinguishing coil of this programme compared with prior art has following characteristics:
1. a plurality of winding arc suppression coils of particular design have been adopted, three winding extinguishing arc lines as shown in Figure 2 Circle. The iron circuit of arc suppression coil is divided into mutually incoherent two independent loops, as shown in Figure 4 four around Group arc suppression coil, the iron circuit of arc suppression coil are divided into mutually incoherent three independent loops. Owing to adopt this Plant special iron circuit structure, the coefficient of coup and winding between arc suppression coil former limit winding and the secondary winding Electrodynamic capacity can independently regulate, make the easier Design and manufacture of arc suppression coil. Adopt a plurality of windings to consist of The continuous regulative mode of segmentation can make the adjustable range of arc suppression coil increase, thereby arc suppression coil is flow through in assurance Harmonic current is littler, thereby need not to arrange harmonic filter.
2. because the equivalent electric sensibility reciprocal adjustable range of arc suppression coil is big, can adopt the humorous degree that takes off that strengthens electrical network, Effectively suppress the neutral point of electric network displacement voltage, thereby can remove the parallel resistance in the arc suppression coil branch road, Reduce equipment and investment, and strengthened system's reliability of operation.
3. because governing speed is fast, can make arc suppression coil be adjusted to resonance point rapidly by being operated in big taking off under the humorous degree situation.Thereby can realize quick compensation of ground capacitance current when electrical network generation single phase ground fault, reach the purpose of rapid blow-out.
4. adopt the arc suppression coil of a plurality of winding particular design, three winding arc suppression coils as shown in Figure 2 and four winding arc suppression coils shown in the accompanying drawing 4, the secondary winding L 1～L3 of arc suppression coil is 1/2～1/50 of a former limit winding L 0.Make the voltage of secondary winding L 1～L3 be reduced to 1/2～1/50 of former limit winding L 0 voltage.Because the reverse parallel connection controllable silicon is connected on secondary winding L 1～L3, thereby the voltage that the reverse correlation controllable silicon bears when turn-offing is low, has so both realized that the segmentation of arc suppression coil inductance value was regulated continuously, greatly reduces the voltage that controllable silicon need tolerate again.In the utility model quick adjustment arc suppression coil, single controllable silicon of employing at present conventional withstand voltage (withstand voltage at 3-5kV) just can be used for controlling the medium voltage network of 6-35kV, need not to adopt the mode of a plurality of controllable silicon series connection to bear high voltage, the many defectives that existed when having avoided the controllable silicon series connection.
5. adopt the equivalent electric sensibility reciprocal of system controlled by computer assembly to reverse parallel connection controllable silicon trigger angle adjustment arc suppression coil, response speed is fast, the control precision height.Can realize fast that also a plurality of parameters such as electric current and voltage to electrical network and the state of electrical network monitor, the automatic inspection of the operating state of the preservation of realization operation of power networks data record and arc suppression coil and measurement gained data communication transmit easily, are applicable to unattended operation transformer station.
Quick adjustment arc suppression coil device of the present utility model, its compact conformation, invest less, dependable performance, can be applicable to the medium voltage network of electric power system and industrial and mining enterprises, will play positive role reducing the incidence that permanent earth that the single-phase fault of arc grounding in short-term causes and single-phase earthing develop into heterogeneous ground connection.In addition, but quick adjustment arc suppression coil device of the present utility model can also allow that the floating ground inductance element that big electric current flows through uses as a kind of novel tolerating high voltage, thereby has bigger market application foreground.
Claims (3)
1. quick adjustment arc suppression coil device, it is by isolating switch K, grounding transformer JB, current transformer CT, arc suppression coil (1), system controlled by computer assembly CP (2), zero sequential potential transformer PT compositions such as (3), wherein: the iron circuit (4) that arc suppression coil (1) is built up by silicon steel sheet, magnetic air gap (5), former limit winding L 0, secondary winding L 1～L3, reverse parallel connection controllable silicon SCR 1～SCR3 constitutes, it is characterized in that grounding transformer JB inserts electrical network LA through isolating switch K, LB, LC, the neutral point O of grounding transformer JB links to each other with an end (6) of former limit winding L 0 through current transformer CT, the other end of L0 (7) ground connection, L1～L3 is in parallel with reverse correlation controllable silicon SCR 1～SCR3 respectively, control end G1～G6 of system controlled by computer assembly CP (2) and reverse parallel connection controllable silicon SCR 1～SCR3, current transformer CT, zero sequential potential transformer PT (3) links to each other respectively, zero sequential potential transformer PT (3) and electrical network LA, LB, LC links to each other.
2. quick adjustment arc suppression coil device according to claim 1, it is characterized in that secondary winding L 1～L3 can be made up of one or more coil windings, iron circuit (4) can be made of one or more independent magnetic circuit loop, former limit winding L 0 is striden in the magnetic circuit loop that is around in one or more, and secondary winding L 1～L3 is in corresponding magnetic circuit loop.
3. quick adjustment arc suppression coil device according to claim 1 is characterized in that isolated insulation between L1～L3 and the L0, and the coil turn of secondary winding L 1～L3 is 1/2～1/50 of the former limit winding L 0 pitch of the laps number of turn.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 00206677 CN2424559Y (en) | 2000-03-18 | 2000-03-18 | Device for fast regulating arc-extinguishing coil |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 00206677 CN2424559Y (en) | 2000-03-18 | 2000-03-18 | Device for fast regulating arc-extinguishing coil |
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| Publication Number | Publication Date |
|---|---|
| CN2424559Y true CN2424559Y (en) | 2001-03-21 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN 00206677 Expired - Fee Related CN2424559Y (en) | 2000-03-18 | 2000-03-18 | Device for fast regulating arc-extinguishing coil |
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| CN (1) | CN2424559Y (en) |
Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100405686C (en) * | 2004-07-08 | 2008-07-23 | 思源电气股份有限公司 | Combined automatic tracing arc extinction compensation and line selecting device |
| CN100459007C (en) * | 2005-03-03 | 2009-02-04 | 华北电力大学 | Volume-regulating type arc-extinction device |
| CN100588069C (en) * | 2005-04-21 | 2010-02-03 | 瑞典中立公司 | Inductive device and method for producing the same |
| CN102457058A (en) * | 2010-10-29 | 2012-05-16 | 徐成飞 | Arc-extinguishing voltage limiting device based on electronic switch |
| CN102736052A (en) * | 2011-04-14 | 2012-10-17 | 上海创力集团股份有限公司 | Current transformer fault self-detection apparatus |
| CN103001194A (en) * | 2012-12-20 | 2013-03-27 | 诸暨市供电局 | On-line line fault monitoring and protection device and protection method thereof |
| CN103050961A (en) * | 2011-10-14 | 2013-04-17 | 安徽一天电气技术有限公司 | Device for processing instantaneous single-phase grounding fault |
| CN103439558A (en) * | 2013-07-30 | 2013-12-11 | 河北旭辉电气股份有限公司 | Capacitance current measuring method of phase-control type arc suppression coil |
| CN103762578A (en) * | 2014-01-14 | 2014-04-30 | 青岛世驰电气有限公司 | Intelligent tuning compensation package unit |
| CN105182019A (en) * | 2015-08-28 | 2015-12-23 | 国家电网公司 | Device and system for reducing number of fusing times of fuse protector |
| CN109873412A (en) * | 2019-03-05 | 2019-06-11 | 中国石油化工股份有限公司 | A kind of distribution system, singlephase earth fault arc-extinction device and its arc extinguishing method |
| CN112436496A (en) * | 2019-08-26 | 2021-03-02 | 中国石油化工股份有限公司 | Small current grounding arc extinction device and arc extinction method |
-
2000
- 2000-03-18 CN CN 00206677 patent/CN2424559Y/en not_active Expired - Fee Related
Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100405686C (en) * | 2004-07-08 | 2008-07-23 | 思源电气股份有限公司 | Combined automatic tracing arc extinction compensation and line selecting device |
| CN100459007C (en) * | 2005-03-03 | 2009-02-04 | 华北电力大学 | Volume-regulating type arc-extinction device |
| CN100588069C (en) * | 2005-04-21 | 2010-02-03 | 瑞典中立公司 | Inductive device and method for producing the same |
| CN102457058A (en) * | 2010-10-29 | 2012-05-16 | 徐成飞 | Arc-extinguishing voltage limiting device based on electronic switch |
| CN102736052A (en) * | 2011-04-14 | 2012-10-17 | 上海创力集团股份有限公司 | Current transformer fault self-detection apparatus |
| CN103050961A (en) * | 2011-10-14 | 2013-04-17 | 安徽一天电气技术有限公司 | Device for processing instantaneous single-phase grounding fault |
| CN103001194A (en) * | 2012-12-20 | 2013-03-27 | 诸暨市供电局 | On-line line fault monitoring and protection device and protection method thereof |
| CN103439558A (en) * | 2013-07-30 | 2013-12-11 | 河北旭辉电气股份有限公司 | Capacitance current measuring method of phase-control type arc suppression coil |
| CN103439558B (en) * | 2013-07-30 | 2015-10-28 | 河北旭辉电气股份有限公司 | The capacitance current measurement method of phase-control type arc suppression coil |
| CN103762578A (en) * | 2014-01-14 | 2014-04-30 | 青岛世驰电气有限公司 | Intelligent tuning compensation package unit |
| CN105182019A (en) * | 2015-08-28 | 2015-12-23 | 国家电网公司 | Device and system for reducing number of fusing times of fuse protector |
| CN109873412A (en) * | 2019-03-05 | 2019-06-11 | 中国石油化工股份有限公司 | A kind of distribution system, singlephase earth fault arc-extinction device and its arc extinguishing method |
| CN112436496A (en) * | 2019-08-26 | 2021-03-02 | 中国石油化工股份有限公司 | Small current grounding arc extinction device and arc extinction method |
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| CF01 | Termination of patent right due to non-payment of annual fee |