CN2671230Y - Active voltage regulator for large non-excited transformer - Google Patents
Active voltage regulator for large non-excited transformer Download PDFInfo
- Publication number
- CN2671230Y CN2671230Y CN 200320131603 CN200320131603U CN2671230Y CN 2671230 Y CN2671230 Y CN 2671230Y CN 200320131603 CN200320131603 CN 200320131603 CN 200320131603 U CN200320131603 U CN 200320131603U CN 2671230 Y CN2671230 Y CN 2671230Y
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- voltage regulator
- load
- transformer
- voltage
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Abstract
The utility model discloses a load voltage regulating device for large no-excitation voltage regulating transformer, belonging to the transformer technical field, used to solve the voltage regulating problem of changing no-load to load. The utility model has the technical proposal that it comprises a no-excitation voltage regulating transformer and a load voltage regulator; the low voltage side of the load voltage regulator is connected in parallel with the low voltage side of the no-excitation large voltage transformer, and the three-phase winding end of the latter high voltage side is separately leaded out and connected in series with the high voltage winding of the load voltage regulator; the taps of the high voltage winding of the load voltage regulator are separately connected with the static contacts of the change-over switch of the load voltage regulator, and three moving contacts are connected together, as the common neutral point of the three-phase winding. Using the utility model, the original transformer can not be proceeded a large change, and the reconstructing project of changing no-load to load can be finished on site. It enlarges the voltage regulating range, improves the power supply quality, and can completely satisfy the requirement of user.
Description
Technical field
The utility model relates to a kind of large-scale off circuit tap changing transfor mer scene that can be used for and carries out the on-load voltage regulating device that the on-load voltage regulation mode is transformed, and belongs to the power transformer technical field.
Background technology
Along with the increase of economic development and household electricity, also more and more higher to the quality requirement of supply of electric power, when the network load fluctuation was big, its voltage should be able in time be adjusted, to meet consumers' demand.Yet, it much is the graded insulation off circuit tap changing transfor mer that the main transformer of electric power system 220KV level large-scale substation operation has, when adjusting voltage, needs must under power down mode, carry out, and range of regulation is less, this has just had a strong impact on the quality of supply of electric power, can't satisfy the needs of industrial and agricultural production and people's lives.For a change this situation must change the non-excitation pressure adjustment mode into the on-load voltage regulation of on-load.At this moment, the most reasonable, the most most economical transform pattern utilizes original off circuit tap changing transfor mer as main transformer exactly, only it is carried out simple on-the-spot the change, property point end is set up a Loading voltage regulator therein again, can finish the transformation task of ' no-load change to have carry '.If this ' no-load change have carry ' transformed is when carrying out under requiring the limited harsh conditions in the constant substantially and space mounting position of former main transformer technical performance, interruption duration, rely on traditional Apparatus and method for obviously can't satisfy the purpose of transformation.
Summary of the invention
The defective of technology that the utility model is used for overcoming is existing ' no-load change to have carry ' and a kind of small investment be provided, easily implement, interruption duration is short, the on-load voltage regulating device that is used for large-scale off circuit tap changing transfor mer of instant effect.
The technical scheme that addresses the above problem is:
A kind of on-load voltage regulating device that is used for large-scale off circuit tap changing transfor mer, it with a large-scale power transformer with the graded insulation non-excitation pressure adjustment as main transformer, its improvement is, it is provided with a Loading voltage regulator, the low-pressure side of Loading voltage regulator is in parallel with the low-pressure side of described main transformer, the on high-tension side three phase winding ends of main transformer are drawn respectively and are connected in series with the high pressure winding of Loading voltage regulator, the tap of each winding of voltage regulator is connected to the fixed contact of on-load tap changer K respectively, and its three moving contacts connect together as the common neutral of three phase windings.
The above-mentioned on-load voltage regulating device that is used for off circuit tap changing transfor mer, the positive and negative pressure regulation progression of described Loading voltage regulator is n, and total pressure regulation progression is (2n+1), and the coil ratio of Loading voltage regulator high-pressure side and low-pressure side is:
U in the formula
HnBe off circuit tap changing transfor mer high-pressure side load voltage value, U
LnBe Loading voltage regulator low-pressure side load voltage value, n is the pressure regulation progression of (or negative) just, and x% is every grade a range of regulation.
The above-mentioned on-load voltage regulating device that is used for off circuit tap changing transfor mer, be connected in series by two three-phase common high voltage sleeve pipes between the high pressure winding end of on high-tension side three phase windings of described Loading voltage regulator and off circuit tap changing transfor mer, described three-phase common high voltage sleeve pipe is by sleeve pipe porcelain spare, capacitor core, support copper pipe, fuel tank and three-phase lead-in wire are formed, wherein, capacitor core is wrapped in and supports outside the copper pipe, sleeve pipe porcelain spare is enclosed within outside the capacitor core, support in the copper pipe and be provided with three phase terminals, every phase terminal is surrounded by insulating coating outward, a fuel tank is arranged on the top of bushing, be full of transformer oil in the fuel tank, three wiring small casings are installed on the oil tank wall, their two ends lay respectively at oil tank wall in, outer both sides, the axis of three wiring small casings constitutes a plane, this plane and bushing axis normal.The end of three wiring small casings in fuel tank respectively with support copper pipe in a phase terminal be connected, lead-in wire is caused outside the fuel tank by small casing porcelain spare, wherein a small casing has the equipotential line with fuel tank in fuel tank.
The above-mentioned on-load voltage regulating device that is used for off circuit tap changing transfor mer, the insulation level of on high-tension side insulation level of described Loading voltage regulator and described off circuit tap changing transfor mer neutral point adapts, and the insulation level of the low-pressure side of Loading voltage regulator is consistent with the low-pressure side of described off circuit tap changing transfor mer.
The on-load voltage regulating device that is used for off circuit tap changing transfor mer according to the utility model provides has following advantage:
1. enlarge range of regulation, improved power supply quality, can satisfy customer requirements fully;
2. technical parameters such as the rated capacity of transformer, insulation level, joint group label are constant, and short-circuit impedance and loss only have the minor variations that allows in the GB scope;
3. small investment need not original old transformer is carried out big change, and the scene can be finished system's no-load very soon and be changed the engineering of carrying is arranged;
4. interruption duration is short, instant effect.
Description of drawings
Fig. 1 is the schematic diagram that is electrically connected of the present utility model;
Fig. 2 is the structural representation of three-phase common high voltage sleeve pipe;
Fig. 3 is the A-A cutaway view of Fig. 4;
Fig. 4 is the C-C cutaway view of Fig. 4;
Fig. 5 is the schematic appearance that off circuit tap changing transfor mer is connected with Loading voltage regulator.
Embodiment
Capacity according to the off circuit tap changing transfor mer that will transform, design one and satisfy the three-phase Loading voltage regulator that transformer capacity requires, the insulation level of its on high-tension side insulation level and off circuit tap changing transfor mer (such as the 220kV transformer) neutral point adapts, and the insulation level of low-pressure side is consistent with the off circuit tap changing transfor mer low-pressure side.From Fig. 1,2,3, can see, the terminal series connection of the high pressure winding of off circuit tap changing transfor mer 1 three-phase Loading voltage regulator 2, being about to off circuit tap changing transfor mer high-tension coil winding terminal X, Y, Z is in series by loaded switch with the high-pressure side winding of Loading voltage regulator 2 respectively, on-load tap changer 3 places on the Loading voltage regulator 2, again draw the three-phase common neutral from Loading voltage regulator 2, the low-pressure side of Loading voltage regulator 2 then is in parallel with the low-pressure side of off circuit tap changing transfor mer 1.Range of regulation is decided according to customer requirements, and the off circuit tap changing transfor mer before technical parameters such as rated capacity, insulation level, impedance and joint group label and the transformation is basic identical, and basic operating conditions is constant.The on-load tap changer 3 (being labeled as K in electrical schematic diagram) that the utility model adopts is a CM type on-load tap changer.
Loading voltage regulator on the make, its iron core adopts full mitered atresia binding structure manufacturing process; Material adopts the grain-oriented cold rolling electric band of magnetic conduction; Coil is a cake formula structure, and its low-voltage side coil is a continous way, and high-tension coil is spiral; Fuel tank adopts the bucket formula, and loaded switch is placed in the fuel tank; Cooling device adopts mountable radiator; Configuration conservator and low-pressure side sleeve pipe, bushing and high pressure neutral bushing on the fuel tank case lid.Voltage regulator is provided with safety and monitoring device.Transformer oil with insulation property is housed in fuel tank and the conservator.
The parameter of Loading voltage regulator is to set like this:
No matter off circuit tap changing transfor mer also uses as step-up transformer or uses as step-down, and the low-pressure side that the excitation of Loading voltage regulator (energy) is taken from the non-excitation pressure adjustment device is convenient and economical.Therefore, the low-pressure side voltage of Loading voltage regulator should be designed to consistent with the low-pressure side voltage of main transformer, and makes two low-pressure side parallel connections.For example, if off circuit tap changing transfor mer low-pressure side rated output voltage is 11kV, then the low-pressure side rated voltage of Loading voltage regulator is designed to 11kV equally, and in use, each step voltage of Loading voltage regulator high-pressure side induction should be consistent according to the x% of its rated voltage calculating with main transformer.If a certain off circuit tap changing transfor mer adopts high pressure neutral point side series connection Loading voltage regulator to be transformed into the on-load voltage regulation mode, if this transformer high-voltage winding is a graded insulation, and basic parameter is:
Rated capacity: S
n, * * * MVA;
Rated voltage ratio: U/U
Mn/ U
LnKV;
Joint group label: Y
Ny
N0D11.
U
Hn, U
Mn, U
LnBe respectively transformer high-voltage, middle pressure, low-pressure side rated voltage.
If the pressure regulation progression that requires to transform as after the on-load voltage regulation is ± n level, then add specified tap after, total pressure regulation progression be (2n+1) grade.If every grade range of regulation is x% (for example 1.25% or 1.33% etc., provided by the user), then total range of regulation is:
U
hn(1±nX/100)KV
Pressure regulation progression n is determined by the user.When getting n=0,1,2,3 ... the x% of n and regulation can calculate the voltage of each grade of transformer high-voltage side according to following formula.For example, if U
Hn=220KV, n=8, X=1.25%, then total range of regulation is:
220 (1 ± 8*1.25/100)=242-198KV, promptly the transformer high-voltage side can be regulated between 198 to 242KV, and this scope is divided into (2n+1)=(2*8+1)=17 grade regulates.
Coil ratio by above-mentioned Loading voltage regulator high-pressure side and low-pressure side is:
The heap(ed) capacity S of Loading voltage regulator
R=S
N* nX/ (100-nX), unit are MVA.
Bushing is the shared unusual casing of three-phase, it is by sleeve pipe porcelain spare 11, capacitor core 12, support copper pipe 13, fuel tank 16 and three phase terminals 15 are formed, wherein, capacitor core 12 is wrapped in and supports outside the copper pipe 13, sleeve pipe porcelain spare 11 is enclosed within outside the capacitor core 12, support in the copper pipe 13 three phase terminals 15 are arranged, every phase terminal is surrounded by insulating coating outward, a fuel tank 16 is arranged on the top of bushing, be full of transformer oil in the fuel tank, three wiring small casings 16 are installed on the oil tank wall, 17, their two ends lay respectively at oil tank wall in, outer both sides, the axis of three wiring small casings constitutes a plane, this plane and bushing axis normal, the end of three wiring small casings in fuel tank respectively with support copper pipe in a phase terminal be connected, the other end of lead-in wire causes outside the fuel tank by sleeve pipe porcelain spare.
Off circuit tap changing transfor mer 1 and Loading voltage regulator 2 is connected as can see from Figure 5.Figure mesolow side bus row 9 is connected with the low-pressure side of off circuit tap changing transfor mer 1 with Loading voltage regulator 2 respectively, lead-in wire in the support copper pipe of the end of the high-tension coil of off circuit tap changing transfor mer 1 and a bushing 4 is connected, lead-in wire in the support copper pipe of the high-tension coil of Loading voltage regulator 2 and another bushing 5 is connected, connect with aerial condutor 8 between the wiring small casing 6,7 of these two bushings, the high-tension coil of Loading voltage regulator and the high-tension coil of off circuit tap changing transfor mer are together in series.
During the transformer operation, low excessively as output voltage, exceed the setting requirement, can cast out a part of number of turn by on-load tap changer, reach the purpose that increases output voltage.If output voltage is too high,, reach the purpose that reduces output voltage by adjusting a part of number of turn in the shunting switch increase Loading voltage regulator.Used adjusting shunting switch can have the operation of carrying, K switch among the figure
1-1For reverse is used.
The utility model is applicable to that there is the improvement project of carrying at the scene of the large-scale non-excitation pressure adjustment power transformer of 220KV, and also can be used for the improvement project of 110KV, 330KV and 500KV level.
Claims (4)
1. on-load voltage regulating device that is used for large-scale off circuit tap changing transfor mer, it with the large-scale power transformer [1] of a graded insulation non-excitation pressure adjustment as main transformer, it is characterized in that: it is provided with a Loading voltage regulator [2], the low-pressure side of Loading voltage regulator [2] is in parallel with the low-pressure side of the large-scale power pressure transformer [1] that described no excitation is transferred, the on high-tension side three phase winding ends of main transformer are drawn respectively and are connected in series with the high pressure winding of Loading voltage regulator, the tap of each winding of Loading voltage regulator is connected to the fixed contact of on-load tap changer [3] respectively, and its three moving contacts connect together as the common neutral of three phase windings.
2. the on-load voltage regulating device that is used for large-scale off circuit tap changing transfor mer according to claim 1, it is characterized in that: the positive and negative pressure regulation progression of described Loading voltage regulator is n, total pressure regulation progression is (2n+1), and the coil ratio of Loading voltage regulator high-pressure side and low-pressure side is:
U in the formula
HnBe off circuit tap changing transfor mer high-pressure side load voltage value, U
LnBe Loading voltage regulator low-pressure side load voltage value, n is the pressure regulation progression of (or negative) just, and x% is every grade a range of regulation.
3. the on-load voltage regulating device that is used for large-scale off circuit tap changing transfor mer according to claim 1 and 2, it is characterized in that: pass through two three-phase common high voltage sleeve pipes [4] between on high-tension side three phase windings of described Loading voltage regulator [2] and off circuit tap changing transfor mer [1] the high pressure winding end, [5] be connected in series mutually, described three-phase common high voltage sleeve pipe is by sleeve pipe porcelain spare [11], capacitor core [12], support copper pipe [13], fuel tank [16] and three phase terminals [15] are formed, wherein, capacitor core [12] is wrapped in and supports outside the copper pipe [13], sleeve pipe porcelain spare [11] is enclosed within outside the capacitor core [12], support in the copper pipe [13] and be provided with three phase terminals [15], every phase terminal is surrounded by insulating coating outward, a fuel tank [16] is arranged on the top of bushing, be full of transformer oil in the fuel tank, three wiring small casings [16] are installed on the oil tank wall, [17], their two ends lay respectively at oil tank wall in, outer both sides, the axis of three wiring small casings constitutes a plane, this plane and bushing axis normal, the end of three wiring small casings in fuel tank respectively with support copper pipe in a phase terminal be connected, making lead-in wire by outside the small casing porcelain spare, wherein small casing and fuel tank are provided with the equipotential line.
4. the on-load voltage regulating device that is used for large-scale off circuit tap changing transfor mer according to claim 3, it is characterized in that: the insulation level of on high-tension side insulation level of described Loading voltage regulator [2] and off circuit tap changing transfor mer [1] neutral point adapts, and the insulation level of the low-pressure side of Loading voltage regulator [2] is consistent with the low-pressure side of described off circuit tap changing transfor mer [1].
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200320131603 CN2671230Y (en) | 2003-12-31 | 2003-12-31 | Active voltage regulator for large non-excited transformer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200320131603 CN2671230Y (en) | 2003-12-31 | 2003-12-31 | Active voltage regulator for large non-excited transformer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2671230Y true CN2671230Y (en) | 2005-01-12 |
Family
ID=34477511
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200320131603 Expired - Fee Related CN2671230Y (en) | 2003-12-31 | 2003-12-31 | Active voltage regulator for large non-excited transformer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2671230Y (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101968995A (en) * | 2010-07-16 | 2011-02-09 | 四川电力试验研究院 | Loaded voltage-regulating reformation device of power transformer and transformation method thereof |
| CN101436462B (en) * | 2007-11-16 | 2012-07-18 | 特变电工股份有限公司 | Wire splice structure of transformer with peripheral voltage regulation change |
| CN101763937B (en) * | 2009-12-31 | 2013-03-27 | 贵州南源电力科技开发有限公司 | Connection method and connection structure of regulating transformer and power transformer |
| CN104934938A (en) * | 2015-06-03 | 2015-09-23 | 南京国电南自电网自动化有限公司 | Transformer voltage regulating switch shift validity check method |
| CN105356802A (en) * | 2015-11-30 | 2016-02-24 | 广东电网有限责任公司电网规划研究中心 | Phase-shifting transformer secondary winding tap switching circuit based on a load voltage regulation switch |
| CN105556815A (en) * | 2014-08-22 | 2016-05-04 | 赖茵豪森机械制造公司 | Switching arrangement comprising two on-load tap changers, electric system comprising a switching arrangement of said type, and use thereof |
| CN109921428A (en) * | 2019-04-08 | 2019-06-21 | 上海国祺能源有限公司 | A kind of three-phase reactor excitation on-load voltage regulation system |
-
2003
- 2003-12-31 CN CN 200320131603 patent/CN2671230Y/en not_active Expired - Fee Related
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101436462B (en) * | 2007-11-16 | 2012-07-18 | 特变电工股份有限公司 | Wire splice structure of transformer with peripheral voltage regulation change |
| CN101763937B (en) * | 2009-12-31 | 2013-03-27 | 贵州南源电力科技开发有限公司 | Connection method and connection structure of regulating transformer and power transformer |
| CN101968995A (en) * | 2010-07-16 | 2011-02-09 | 四川电力试验研究院 | Loaded voltage-regulating reformation device of power transformer and transformation method thereof |
| CN105556815A (en) * | 2014-08-22 | 2016-05-04 | 赖茵豪森机械制造公司 | Switching arrangement comprising two on-load tap changers, electric system comprising a switching arrangement of said type, and use thereof |
| CN105556815B (en) * | 2014-08-22 | 2020-03-17 | 赖茵豪森机械制造公司 | Switching device for an electrical installation having a control winding, and electrical installation |
| CN104934938A (en) * | 2015-06-03 | 2015-09-23 | 南京国电南自电网自动化有限公司 | Transformer voltage regulating switch shift validity check method |
| CN104934938B (en) * | 2015-06-03 | 2017-10-31 | 南京国电南自电网自动化有限公司 | A kind of tap changer of transformer gear validity check method |
| CN105356802A (en) * | 2015-11-30 | 2016-02-24 | 广东电网有限责任公司电网规划研究中心 | Phase-shifting transformer secondary winding tap switching circuit based on a load voltage regulation switch |
| CN109921428A (en) * | 2019-04-08 | 2019-06-21 | 上海国祺能源有限公司 | A kind of three-phase reactor excitation on-load voltage regulation system |
| CN109921428B (en) * | 2019-04-08 | 2023-08-01 | 上海国祺能源有限公司 | Three-phase reactor excitation on-load voltage regulating system |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| ASS | Succession or assignment of patent right |
Owner name: BAODING TIANWEI SHUNDA TRANSFORMER CO., LTD. Free format text: FORMER OWNER: TIANWEI GROUP CO., LTD., BAODING Effective date: 20081114 |
|
| C41 | Transfer of patent application or patent right or utility model | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20081114 Address after: No 2399, West Print-Rite Road, Baoding, Hebei: 071056 Patentee after: Baoding Tianwei Shunda Transformer Co., Ltd. Address before: No 318, West Print-Rite Road, Baoding, Hebei: 071056 Patentee before: Baoding Tianwei Group Co., Ltd. |
|
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20050112 Termination date: 20121231 |