CN105305835A - Multistage on-load voltage regulation anti-icing transformer - Google Patents
Multistage on-load voltage regulation anti-icing transformer Download PDFInfo
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- CN105305835A CN105305835A CN201410229590.5A CN201410229590A CN105305835A CN 105305835 A CN105305835 A CN 105305835A CN 201410229590 A CN201410229590 A CN 201410229590A CN 105305835 A CN105305835 A CN 105305835A
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- control switch
- switch group
- group circuit
- voltage regulation
- transformer
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Abstract
The invention relates to a multistage on-load voltage regulation anti-icing transformer and belongs to the technical field of devices for removing ice and snow from power transmission lines. The transformer is connected to the head end and the tail end of the power transmission line of which the voltage level is higher than 110kV; the transformer comprises a main winding, a voltage regulation winding, a first control switch group circuit and a second control switch group circuit; the main winding is arranged on a primary side; the voltage regulation winding is arranged on a secondary side; a plurality of state mechanical switches are led out from the voltage regulation winding and are connected with the control switch group circuits in series; the adjacent state mechanical switches are not connected with the same control switch group circuit; the ends, which are not connected with the state mechanical switches, of the first control switch group circuit and the second control switch group circuit are the same node; and the node is connected with an equivalent load impedor and the voltage regulation winding in series. According to the transformer, large-range sectional controlled voltage regulation can be achieved, so that the size of a current value on the power transmission line can be changed; and non-arc and non-impact at a switch end in a state switching process are achieved through specific operation steps.
Description
Technical field
The present invention relates to a kind of ice-covering-proof transformer, belong to the device technique field of deicing or snow from power transmission line.
Background technology
Cold raindrop dropped to temperature be below the freezing point (0 DEG C) object on just form glaze, if condense on electric wire, just make Ice.Here it is Ice.If the institute's live wire within the scope of is all encased by ice, Here it is line ice coating.Icing makes thin electric wire become ice lolly, and for the high-tension bus-bar of long distance powedr transmission, it relies on steel tower to support.Icing makes steel tower increase heavy burden.Serious icing makes these electric wires of the unable support of steel tower and collapses.And insulator string on steel tower has had icing just can only operate a switch make power transmission line stop transmission of electricity, so cause large-area power breakdown.Obvious line ice coating is serious disaster.
The research and apply of ice-removing and ice-preventing method, technology is a global difficult problem, this is carried out to long-term research both at home and abroad.Nearly kind more than 30 is in the ice-removing and ice-preventing Method and Technology in various stage at present, is summed up and roughly can be divided into following a few class: heating power deicing method, mechanical deicing's method, natural passive means and other deicing methods.
The method that low Curie's magnetic hot line deicing method that typical heating power clearing ice technology has high-voltage direct current clearing ice technology, alternating current clearing ice technology, pulse electrothermal deicing technology, high current density melting ice method and 1988 ~ nineteen ninety to be developed by Wuhan High Voltage Research Institute, the short circuit current ice-melting method etc. that China adopts always and Canadian Manitoba hydroelectric board adopts make icing melt by electric heating self-heating transmission line.There is a problem in low Curie's magnetic hot line deicing method, when ambient temperature reaches after deicing requirement carries out deicing operation, when ambient temperature does not change, ferromagnetic material still produces thermosteresis, affects circuit through-put power.And short circuit current ice-melting method, the transmission line of ice-melt need be stopped, and combined floodgate impact may cause system stability malicious event.
Summary of the invention
The technical problem to be solved in the present invention is, not enough for prior art, proposes the ice-covering-proof transformer of multistage on-load voltage regulation, be connected on the transmission line first, last two ends of electric pressure higher than 110kV, realize segmented controllable voltage regulating on a large scale, and in pressure regulation process, switch terminals is without arc, without impacting.
The present invention is a kind of technical scheme solving the problems of the technologies described above proposition: the ice-covering-proof transformer of multistage on-load voltage regulation, described transformer comprises main winding, tap-changing windings, first control switch group circuit and the second control switch group circuit, the coil ratio of described main winding and tap-changing windings is 1:1, described tap-changing windings is drawn some state mechanical switchs, described state mechanical switch successively interval is connected to form first node and Section Point, described first node connects the first control switch group circuit, described Section Point connects the second control switch group circuit, described first control switch group circuit and the second control switch group circuit are connected to form the 3rd node, described first control switch group circuit is consistent with the second control switch group circuit structure, and described control switch group circuit comprises the first branch road and the second branch road, described first branch road and the second branch circuit parallel connection, described first route first mechanical switch connect the first thyristor switch parallel with one another and the first resistance composition, described second route second mechanical switch, the second thyristor switch and the second resistant series composition, described first resistance is greater than the second resistance.
The improvement of technique scheme is: tap-changing windings is divided into main coil and some voltage regulation coils by the state mechanical switch that described tap-changing windings is drawn, and the turn ratio of described main coil and single voltage regulation coil is 20:5.
The present invention adopts the beneficial effect of technique scheme to be: by accessing the voltage regulation coil of varying number in specific proportions at secondary side, regulates and once with the coil ratio of secondary side, pressure drop scope is reached (0 ~ 80%); On control switch group circuit, to bear peak-inverse voltage controlled for thyristor switch, is only about 500V, well below the pressure-bearing scope of thyristor switch under 220kV electric pressure.
Accompanying drawing explanation
Below in conjunction with accompanying drawing, the invention will be further described:
Fig. 1 is the circuit diagram of the embodiment of the present invention.
Embodiment
Embodiment
The ice-covering-proof transformer of multistage on-load voltage regulation that the present embodiment proposes, this transformer is connected on the transmission line first, last two ends of electric pressure higher than 110kV, and the primary side being connected on the transformer of transmission line head end is main winding, and the secondary side of this transformer is tap-changing windings; The primary side being connected on the transformer of power transmission line end is tap-changing windings, and the secondary side of this transformer is main winding; Realize head end step-down, the function of end boosting or the step-down of end boosting head end.
Circuit is the schematic diagram that this transformer is connected on transmission line head end as shown in Figure 1, and described transformer comprises the main winding L being arranged on primary side
01, be arranged on the tap-changing windings of secondary side, the first control switch group circuit and the second control switch group circuit; The coil ratio of the main winding of described primary side and the tap-changing windings of secondary side is 1:1, and described tap-changing windings draws 17 state mechanical switch (S
1, S
2, S
3, S
4, S
5, S
6, S
7, S
8, S
9, S
10, S
11, S
12, S
13, S
14, S
15, S
16, S
17), state machinery switch S
1, S
3, S
5, S
7, S
9, S
11, S
13, S
15, S
17be interconnected to form first node, this node is connected with the first control switch group circuit, state machinery switch S
2, S
4, S
6, S
8, S
10, S
12, S
14, S
16be interconnected to form Section Point, this node is connected with the second control switch group circuit, described first control switch group circuit and the second control switch group circuit are connected to form the 3rd node, and this node and described tap-changing windings are tapped at transmission line equivalent load impedance (R
l, L
l) one end and the other end.
As shown in Figure 1, described first control switch group circuit is consistent with the second control switch group circuit structure, first route mechanical switch S of described first control switch group circuit
01and thyristor switch K parallel with one another
3with resistance R
1be composed in series; Second route mechanical switch S of described first control switch group circuit
03, thyristor switch K
1with resistance R
3be composed in series, resistance R
1resistance is much larger than resistance R
3resistance; First route mechanical switch S of described second control switch group circuit
02and thyristor switch K parallel with one another
4with resistance R
2be composed in series; Second route mechanical switch S of described second control switch group circuit
04, thyristor switch K
2with resistance R
4be composed in series, described resistance R
2resistance is much larger than resistance R
4resistance.
The improvement of the present embodiment is: the state mechanical switch (S that described tap-changing windings is drawn
1, S
2, S
3, S
4, S
5, S
6, S
7, S
8, S
9, S
10, S
11, S
12, S
13, S
14, S
15, S
16, S
17) tap-changing windings is divided into main coil L
0with 16 voltage regulation coil (L
1, L
2, L
3, L
4, L
5, L
6, L
7, L
8, L
9, L
10, L
11, L
12, L
13, L
14, L
15, L
16), the turn ratio of described main coil and single voltage regulation coil is 20:5, and between voltage regulation coil, turn ratio is 1:1.
Each thyristor switch trigger instants is the current zero-crossing point moment in the voltage regulation coil under corresponding states.During mechanical switch action, negligible owing to flowing through its electric current, therefore without strict requirement operate time.
The switch access state that in 0-16 pressure regulation states as shown in table 1 and table 2, each state is corresponding, realizes the excursion of pressure regulation ratio (0 ~ 80%).
The relation of tap-changing windings pressure regulation state and pressure regulation no-load voltage ratio and voltage is shown in Table 1.
The relation of table 1 pressure regulation state and the tap-changing windings number of turn, no-load voltage ratio, secondary side voltage
| Pressure regulation state | The tap-changing windings number of turn (%) | No-load voltage ratio | Secondary side voltage (p.u.) |
| 0 | 0 | 5.00 | 0.2 |
| 1 | 5 | 4.00 | 0.25 |
| 2 | 10 | 3.33 | 0.30 |
| 3 | 15 | 2.86 | 0.35 |
| 4 | 20 | 2.50 | 0.40 |
| 5 | 25 | 2.22 | 0.45 |
| 6 | 30 | 2.00 | 0.50 |
| 7 | 35 | 1.82 | 0.55 |
| 8 | 40 | 1.67 | 0.60 |
| 9 | 45 | 1.54 | 0.65 |
| 10 | 50 | 1.43 | 0.70 |
| 11 | 55 | 1.33 | 0.75 |
| 12 | 60 | 1.25 | 0.80 |
| 13 | 65 | 1.18 | 0.85 |
| 14 | 70 | 1.11 | 0.90 |
| 15 | 75 | 1.05 | 0.95 |
| 16 | 80 | 1 | 1 |
Note: when calculating secondary side voltage perunit value, getting primary side voltage perunit value is 1.
The corresponding relation of pressure regulation state and on off state and tap-changing windings is as shown in table 2.
The relation of table 2 pressure regulation state and switch, tap-changing windings
The control switch group circuit that in like manner required switching state is corresponding, after the first mechanical switch on closed corresponding state mechanical switch and this control switch group circuit, the second thyristor switch two ends on corresponding control switch group circuit are born magnitude of voltage and are deducted the ohmically voltage drop value of this circuit second for the ohmically voltage drop value of this control switch group circuit first;
Clearly above-mentioned voltage drop value is controlled, can accomplish that the crest voltage that thyristor switch in the circuit will bear reduces by simply deriving.
After the second thyristor switch conducting on control switch group circuit corresponding to initial condition, this control switch group circuit now go up essence be after the second resistance is connected with the second thyristor switch again with the first resistor coupled in parallel, because the first resistance is much larger than the second resistance, so the current value on current value on the first resistance place branch road branch road of connecting with the second thyristor switch much smaller than the second resistance, almost negligible, the first mechanical switch therefore now disconnected on the road at the first resistance place can not produce electric arc.
On control switch group circuit in like manner corresponding to wanted switching state, because the first resistance is much larger than the second resistance, therefore the current value on the branch road that the current value on the first resistance place branch road is connected with the second thyristor switch much smaller than the second resistance, almost negligible, therefore can not produce electric arc when closing the first mechanical switch on this control switch group circuit.
So according to using this transformer can steadily switch to each running status described in above-mentioned steps, realize in practical process without arc with without impact.
Below for operating state 16 switches to the operating procedure of operating state 15:
1) see table 2 initial condition be state machinery switch S
17, mechanical switch S
01and thyristor switch K
3closed, other switches all disconnect;
2) stop to thyristor switch K
3send trigger impulse, i.e. thyristor switch K
3disconnect, closed mechanical switch S
03; Now resistance R
1place in circuit, resistance R
1place branch road and mechanical switch S
03place branch circuit parallel connection, therefore thyristor switch K
3with thyristor switch K
1on bear voltage and be resistance R
1the voltage at two ends.Therefore by selecting suitable resistance to accomplish, the crest voltage that thyristor switch in the circuit will bear reduces.
3) to thyristor switch K
1send trigger impulse, i.e. thyristor switch K
1conducting, disconnects mechanical switch S
01, closed mechanical switch S
04; Now resistance R
1with R
3parallel connection, due to resistance R
3resistance is much smaller than resistance R
1resistance, therefore resistance R
1current value on the branch road of place is much smaller than resistance R
3current value on the branch road of place, and due to thyristor switch K
2not yet conducting and mechanical switch S
04place branch road is in off state at present, so at disconnection mechanical switch S
01with closed mechanical switch S
04time, switch can not produce electric arc.
4) closure state mechanical switch S
16with mechanical switch S
02; Now resistance R
2place in circuit, its place branch road and mechanical switch S
04place branch circuit parallel connection is thyristor switch K therefore
2on to bear voltage be resistance R
2the voltage at two ends.Therefore by selecting suitable resistance to accomplish, the crest voltage that thyristor switch in the circuit will bear reduces.
5) to thyristor switch K
2send trigger impulse, i.e. thyristor switch K
2conducting;
6) stop to thyristor switch K
1send trigger impulse, i.e. thyristor switch K
1disconnect;
7) off-state mechanical switch S
17with mechanical switch S
03; Because no current flows through, therefore electric arc can not be produced.
8) stop to thyristor switch K
2send trigger impulse, i.e. thyristor switch K
2disconnect; Thyristor switch K
2bearing voltage is resistance R
2both end voltage.
9) mechanical switch S is disconnected
04; Because no current flows through, therefore electric arc can not be produced.
10) to thyristor switch K
4send trigger impulse, i.e. thyristor switch K
4conducting.
In above-mentioned steps, when thyristor switch trigger instants is current zero-crossing point in corresponding voltage regulation coil.During mechanical switch action, negligible owing to flowing through its electric current, therefore without strict requirement operate time.
The present invention is not limited to above-described embodiment.All employings are equal to the technical scheme of replacing and being formed, and all drop on the protection range of application claims.
Claims (2)
1. the ice-covering-proof transformer of multistage on-load voltage regulation, it is characterized in that: described transformer comprises main winding, tap-changing windings, first control switch group circuit and the second control switch group circuit, the coil ratio of described main winding and tap-changing windings is 1:1, described tap-changing windings is drawn some state mechanical switchs, described state mechanical switch successively interval is connected to form first node and Section Point, described first node connects the first control switch group circuit, described Section Point connects the second control switch group circuit, described first control switch group circuit and the second control switch group circuit are connected to form the 3rd node, described first control switch group circuit is consistent with the second control switch group circuit structure, and described control switch group circuit comprises the first branch road and the second branch road, described first branch road and the second branch circuit parallel connection, described first route first mechanical switch connect the first thyristor switch parallel with one another and the first resistance composition, described second route second mechanical switch, the second thyristor switch and the second resistant series composition, described first resistance is greater than the second resistance.
2. the ice-covering-proof transformer of multistage on-load voltage regulation as claimed in claim 1, it is characterized in that: tap-changing windings is divided into main coil and some voltage regulation coils by the state mechanical switch that described tap-changing windings is drawn, the turn ratio of described main coil and single voltage regulation coil is 20:5.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410229590.5A CN105305835A (en) | 2014-05-27 | 2014-05-27 | Multistage on-load voltage regulation anti-icing transformer |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410229590.5A CN105305835A (en) | 2014-05-27 | 2014-05-27 | Multistage on-load voltage regulation anti-icing transformer |
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| Publication Number | Publication Date |
|---|---|
| CN105305835A true CN105305835A (en) | 2016-02-03 |
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|---|---|---|---|
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0970172A (en) * | 1995-08-30 | 1997-03-11 | Shigeisa Imoto | Regulator |
| CN202068191U (en) * | 2011-01-19 | 2011-12-07 | 西安盟创电器有限公司 | Countryside supercharger |
| CN102208265B (en) * | 2011-03-01 | 2012-11-07 | 中国农业大学 | On-load tapping switch of composite switching-type transformer |
| CN203180458U (en) * | 2013-04-15 | 2013-09-04 | 都匀供电局 | Self-powered ice-melting electric reactor |
| WO2014016532A2 (en) * | 2012-07-26 | 2014-01-30 | Transfix | Device for dynamically adjusting the voltage of an electrical network |
| CN203910500U (en) * | 2014-05-27 | 2014-10-29 | 江苏省电力公司南京供电公司 | Multistage on-load voltage regulation icing preventing transformer |
-
2014
- 2014-05-27 CN CN201410229590.5A patent/CN105305835A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0970172A (en) * | 1995-08-30 | 1997-03-11 | Shigeisa Imoto | Regulator |
| CN202068191U (en) * | 2011-01-19 | 2011-12-07 | 西安盟创电器有限公司 | Countryside supercharger |
| CN102208265B (en) * | 2011-03-01 | 2012-11-07 | 中国农业大学 | On-load tapping switch of composite switching-type transformer |
| WO2014016532A2 (en) * | 2012-07-26 | 2014-01-30 | Transfix | Device for dynamically adjusting the voltage of an electrical network |
| CN203180458U (en) * | 2013-04-15 | 2013-09-04 | 都匀供电局 | Self-powered ice-melting electric reactor |
| CN203910500U (en) * | 2014-05-27 | 2014-10-29 | 江苏省电力公司南京供电公司 | Multistage on-load voltage regulation icing preventing transformer |
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Application publication date: 20160203 |