CN113077978A - Novel voltage-regulating phase-shifting transformer with high-capacity double-device height impedance and additional reactor - Google Patents
Novel voltage-regulating phase-shifting transformer with high-capacity double-device height impedance and additional reactor Download PDFInfo
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- CN113077978A CN113077978A CN202110395984.8A CN202110395984A CN113077978A CN 113077978 A CN113077978 A CN 113077978A CN 202110395984 A CN202110395984 A CN 202110395984A CN 113077978 A CN113077978 A CN 113077978A
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F27/00—Details of transformers or inductances, in general
- H01F27/40—Structural association with built-in electric component, e.g. fuse
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F27/00—Details of transformers or inductances, in general
- H01F27/34—Special means for preventing or reducing unwanted electric or magnetic effects, e.g. no-load losses, reactive currents, harmonics, oscillations, leakage fields
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F29/00—Variable transformers or inductances not covered by group H01F21/00
- H01F29/02—Variable transformers or inductances not covered by group H01F21/00 with tappings on coil or winding; with provision for rearrangement or interconnection of windings
- H01F29/04—Variable transformers or inductances not covered by group H01F21/00 with tappings on coil or winding; with provision for rearrangement or interconnection of windings having provision for tap-changing without interrupting the load current
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Abstract
The invention relates to a novel voltage-regulating phase-shifting transformer with high-capacity double-device height impedance and an additional reactor, belonging to the field of power transformers. The technical scheme is as follows: the on-load tap changer comprises a series transformer oil tank, an excitation transformer oil tank, a series transformer, an excitation transformer, a first resistance-type on-load tap changer K1 with a first polarity selector KzF1, and a second resistance-type on-load tap changer K2 with a second polarity selector KzF 2; with an additional reactor. The invention has the following positive effects: the current passing through the circuit is controlled through the change of the same-phase voltage, the actual current of each parallel branch of the parallel power system is controlled through the phase angle regulation of the phase shifting coil, so that the overcurrent problem caused by a parallel transmission circuit is solved, the short-circuit current of the system is greatly limited through the phase shifting coil with an additional reactor, and the operation of the power system is more stable and efficient.
Description
Technical Field
The invention relates to a novel voltage-regulating phase-shifting transformer with high-capacity double-device body height impedance, which is suitable for power regulation of a grid-connected transmission line of a power system, can limit short-circuit current of the system, and belongs to the field of power transformers.
Background
In order to make the operation of the power system more stable and efficient, in some applications, besides requiring that the transformer has continuously adjustable phase angle and adjustable synchronous voltage within a certain range, the synchronous voltage also needs to be continuously adjustable within a certain range, so as to solve the problem of overcurrent caused by a parallel transmission circuit.
Disclosure of Invention
The invention aims to provide a novel voltage-regulating phase-shifting transformer with high-capacity double-device body height impedance, which controls the current passing through a line through the change of the same-phase voltage, controls the actual current of each parallel branch of a parallel power system through the phase angle regulation of a phase-shifting coil, thereby solving the overcurrent problem caused by a parallel transmission circuit, greatly limits the short-circuit current of the system through the phase-shifting coil with an additional reactor, ensures that the operation of the power system is more stable and efficient, optimizes the structure and reduces the cost at the same time, and solves the technical problems in the prior art.
The technical scheme of the invention is as follows:
a high-capacity double-device height impedance novel voltage-regulating phase-shifting transformer with an additional reactor is characterized in that the phase angle difference between the power side and the load side of the voltage-regulating phase-shifting transformer is continuously adjustable (within a set range), and meanwhile, the synchronous voltage is also continuously adjustable (within the set range); the current passing through the line is controlled through the change of the same-phase voltage, the actual current of each parallel branch of the parallel power system is controlled through the phase angle regulation of the phase-shifting coil, and the overcurrent problem caused by the parallel transmission circuit is solved; the phase shifting coil is provided with an additional reactor, the actual current of each parallel branch of the parallel power system is controlled through phase angle adjustment of the phase shifting coil, the short-circuit current of the system is greatly limited, and the power system can run more stably and efficiently.
The voltage-regulating phase-shifting transformer comprises a series transformer oil tank, an excitation transformer oil tank, a series transformer, an excitation transformer, a first resistance type on-load tap-changer K1 with a first polarity selector KzF1 and a second resistance type on-load tap-changer K2 with a second polarity selector KzF 2; and an additional reactor LRC is provided, and comprises LRC1, LRC2 and LRC 3.
The series transformer oil tank is communicated with the excitation transformer oil tank through a pipeline; each phase of the series transformer consists of a high-voltage coil Lcg and a low-voltage coil Lcd, the head end a of the low-voltage coil Lcd of each phase of the series transformer is connected with the A1 end of the corresponding second resistance-type on-load tap-changer K2, and the tail end b of the low-voltage coil Lcd of each phase of the series transformer is connected with the moving contact of the corresponding first polarity selector KzFi; the power supply terminals of the high-voltage coil Lcg of each phase of the series transformer are respectively S1, S2 and S3, and the high-voltage coil Lcg of each phase of the series transformer is connected with an additional reactor LRC and then connected with the corresponding load-side outlet terminals respectively to be L1, L2 and L3.
Each phase of the excitation transformer consists of a high-voltage coil LLg, a phase shifting coil LLt1 and a voltage regulating coil LLt2, the high-voltage coil LLg of the excitation transformer is in star connection, and the other end of the high-voltage coil LLg of each phase of the excitation transformer is connected with a center tap of the high-voltage coil Lcg of the corresponding phase of the series transformer.
The head and tail ends of each phase shifting coil LLtl of the excitation transformer are respectively connected with the positive end and the negative end of the first polarity selector KzF1 of the phase, the moving contact of the first polarity selector KzF1 of the phase is connected with the moving contact of the second polarity selector KzF2 of the adjacent phase, and the tapping lead-out of the phase shifting coil LLtl of the phase is connected with the fixed contact of the first resistance type on-load tap-changer of the phase.
The head and tail ends of each phase of voltage regulating coil LLt2 of the excitation transformer are respectively connected with the positive end and the negative end of the second polarity selector KzF2 of the phase, and the tap-off terminal of the voltage regulating coil LLt2 of the phase is connected with the fixed contact of the second resistance type on-load tap-changer of the phase.
Additional reactors LRC1, LRC2 and LRC3 are respectively connected in series in front of outgoing lines of sleeves of load side outgoing terminals L1, L2 and L3 of the voltage-regulating phase-shifting transformer, and bodies of the additional reactors LRC1, LRC2 and LRC3 are placed in an oil tank of the series transformer.
The invention has the following positive effects: the current passing through the circuit is controlled through the change of the same-phase voltage, the actual current of each parallel branch of the parallel power system is controlled through the phase angle regulation of the phase shifting coil, so that the problem of over-current caused by a parallel transmission circuit is solved, the short-circuit current of the system is greatly limited through the phase shifting coil with an additional reactor, the operation of the power system is more stable and efficient, and the structure is optimized, so that the cost is reduced.
Drawings
FIG. 1 is a schematic structural view (wiring diagram) of an embodiment of the present invention;
FIG. 2 is a single phase wiring diagram of an embodiment of the present invention;
FIG. 3 is a vector diagram according to an embodiment of the present invention.
Detailed Description
The invention is further described below with reference to the accompanying drawings and examples.
A high-capacity double-device height impedance novel voltage-regulating phase-shifting transformer with an additional reactor is characterized in that the phase angle difference between the power side and the load side of the voltage-regulating phase-shifting transformer is continuously adjustable (within a set range), and meanwhile, the synchronous voltage is also continuously adjustable (within the set range); the current passing through the line is controlled through the change of the same-phase voltage, the actual current of each parallel branch of the parallel power system is controlled through the phase angle regulation of the phase-shifting coil, and the overcurrent problem caused by the parallel transmission circuit is solved; the phase shifting coil is provided with an additional reactor, the actual current of each parallel branch of the parallel power system is controlled through phase angle adjustment of the phase shifting coil, the short-circuit current of the system is greatly limited, and the power system can run more stably and efficiently.
In an embodiment, referring to fig. 1-3, the voltage-regulating phase-shifting transformer comprises a series transformer tank, an excitation transformer tank, a series transformer, an excitation transformer, a first resistive on-load tap-changer K1 with a first polarity selector KzF1, a second resistive on-load tap-changer K2 with a second polarity selector KzF 2; and an additional reactor LRC is provided, and comprises LRC1, LRC2 and LRC 3.
The series transformer oil tank is communicated with the excitation transformer oil tank through a pipeline.
Each phase of the series transformer consists of a high-voltage coil Lcg and a low-voltage coil Lcd, the head end a of the low-voltage coil Lcd of each phase of the series transformer is connected with the A1 end of the corresponding second resistance-type on-load tap-changer K2, and the tail end b of the low-voltage coil Lcd of each phase of the series transformer is connected with the moving contact of the corresponding first polarity selector KzFi; the power supply terminals of the high-voltage coil Lcg of each phase of the series transformer are respectively S1, S2 and S3, and the high-voltage coil Lcg of each phase of the series transformer is connected with an additional reactor LRC and then connected with the corresponding load-side outlet terminals respectively to be L1, L2 and L3.
Each phase of the excitation transformer consists of a high-voltage coil LLg, a phase shifting coil LLt1 and a voltage regulating coil LLt2, the high-voltage coil LLg of the excitation transformer is in star connection, and the other end of the high-voltage coil LLg of each phase of the excitation transformer is connected with a center tap of the high-voltage coil Lcg of the corresponding phase of the series transformer.
The head and tail ends of each phase shifting coil LLtl of the excitation transformer are respectively connected with the positive end and the negative end of the first polarity selector KzF of the phase, the moving contact of the first polarity selector KzF1 of the phase is connected with the moving contact of the second polarity selector KzF2 of the adjacent phase (with the phase difference of 120 degrees), and the tapping lead-out of the phase shifting coil LLtl of the phase is connected with the fixed contact of the first resistance type on-load tap-changer of the phase.
The head and tail ends of each phase of voltage regulating coil LLt2 of the excitation transformer are respectively connected with the positive end and the negative end of the second polarity selector KzF2 of the phase, and the tap-off head of the voltage regulating coil LLt2 of the phase is connected with the fixed contact of the second resistance type on-load tap-changer of the phase.
The working principle of the embodiment is as follows:
1. phase shift principle:
the phase shift is accomplished by a phase shifting coil LLtl and a first resistive on-load tap changer K1 with a first polarity selector KzF 1. The first resistive on-load tap-changer K1 is used to adjust the output voltage of the excitation transformer (plus or minus, automatically adjusted by the operating mechanism associated with the first resistive on-load tap-changer K1). This voltage energizes the core of the series transformer, which has a high voltage winding Lcg for each phase connected at its leading end to the input line and at its trailing end to the output line, and a load current flowing through the winding, the series transformer and exciter transformer being wired as shown in fig. 1. In the case of such a connection, the voltage change at the low-voltage coil Lcd, which is connected in a delta configuration, on the series transformer leads or lags the voltage at the corresponding high-voltage coil LLg of the excitation transformer by 90 °. This voltage is transmitted to the corresponding high voltage winding Lcg of the series transformer and produces the voltages AU 1.1 and Δ U.2 (see fig. 3) which produce a phase angle change between the source side voltage (US i) and the load side voltage (UL) of the present phase shifting transformer.
2. And (3) voltage regulation principle:
the voltage regulation is accomplished by a voltage regulation coil LLt2 and a second resistive on-load tap changer K2 with a second polarity selector KzF 2.
The voltage generated by the voltage regulating coil LLt2 is at a 90 angle to the voltage of the series transformer. This voltage is transmitted to a corresponding high voltage winding Lcg on the series transformer so that the magnitude of the output voltage of the series transformer is different from the magnitude of the input voltage, thereby performing a voltage regulation function (see fig. 3).
Claims (7)
1. The utility model provides a novel voltage regulation of high capacity dual device height impedance moves transformer with additional reactor which characterized in that: the phase angle difference between the power supply side and the load side of the voltage-regulating phase-shifting transformer is continuously adjustable, and meanwhile, the synchronous voltage is also continuously adjustable; the current passing through the line is controlled through the change of the same-phase voltage, the actual current of each parallel branch of the parallel power system is controlled through the phase angle regulation of the phase-shifting coil, and the overcurrent problem caused by the parallel transmission circuit is solved; the phase shifting coil is provided with an additional reactor, the actual current of each parallel branch of the parallel power system is controlled through phase angle adjustment of the phase shifting coil, the short-circuit current of the system is greatly limited, and the power system can run more stably and efficiently.
2. The high-capacity double-device height impedance novel voltage-regulating phase-shifting transformer with the additional reactor as claimed in claim 1, which is characterized in that: the voltage-regulating phase-shifting transformer comprises a series transformer oil tank, an excitation transformer oil tank, a series transformer, an excitation transformer, a first resistance type on-load tap-changer K1 with a first polarity selector KzF1 and a second resistance type on-load tap-changer K2 with a second polarity selector KzF 2; and an additional reactor LRC is provided, and comprises LRC1, LRC2 and LRC 3.
3. The high-capacity double-device height impedance novel voltage-regulating phase-shifting transformer with the additional reactor as claimed in claim 2, which is characterized in that: the series transformer oil tank is communicated with the excitation transformer oil tank through a pipeline; each phase of the series transformer consists of a high-voltage coil Lcg and a low-voltage coil Lcd, the head end a of the low-voltage coil Lcd of each phase of the series transformer is connected with the A1 end of the corresponding second resistance-type on-load tap-changer K2, and the tail end b of the low-voltage coil Lcd of each phase of the series transformer is connected with the moving contact of the corresponding first polarity selector KzFi; the power supply terminals of the high-voltage coil Lcg of each phase of the series transformer are respectively S1, S2 and S3, and the high-voltage coil Lcg of each phase of the series transformer is connected with an additional reactor LRC and then connected with the corresponding load-side outlet terminals respectively to be L1, L2 and L3.
4. The high-capacity double-device height impedance novel voltage-regulating phase-shifting transformer with the additional reactor as claimed in claim 2 or 3, which is characterized in that: each phase of the excitation transformer consists of a high-voltage coil LLg, a phase shifting coil LLt1 and a voltage regulating coil LLt2, the high-voltage coil LLg of the excitation transformer is in star connection, and the other end of the high-voltage coil LLg of each phase of the excitation transformer is connected with a center tap of the high-voltage coil Lcg of the corresponding phase of the series transformer.
5. The high-capacity double-device height impedance novel voltage-regulating phase-shifting transformer with the additional reactor as claimed in claim 4, wherein: the head and tail ends of each phase shifting coil LLtl of the excitation transformer are respectively connected with the positive end and the negative end of the first polarity selector KzF of the phase, the moving contact of the first polarity selector KzF1 of the phase is connected with the moving contact of the second polarity selector KzF2 of the adjacent phase, and the tapping lead-out of the phase shifting coil LLtl of the phase is connected with the fixed contact of the first resistance type on-load tap-changer of the phase.
6. The high-capacity double-device height impedance novel voltage-regulating phase-shifting transformer with the additional reactor as claimed in claim 5, which is characterized in that: the head and tail ends of each phase of voltage regulating coil LLt2 of the excitation transformer are respectively connected with the positive end and the negative end of the second polarity selector KzF2 of the phase, and the tap-off terminal of the voltage regulating coil LLt2 of the phase is connected with the fixed contact of the second resistance type on-load tap-changer of the phase.
7. The high-capacity double-device height impedance novel voltage-regulating phase-shifting transformer with the additional reactor as claimed in claim 6, which is characterized in that: additional reactors LRC1, LRC2 and LRC3 are respectively connected in series in front of outgoing lines of sleeves of load side outgoing terminals L1, L2 and L3 of the voltage-regulating phase-shifting transformer, and bodies of the additional reactors LRC1, LRC2 and LRC3 are placed in an oil tank of the series transformer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110395984.8A CN113077978A (en) | 2021-04-13 | 2021-04-13 | Novel voltage-regulating phase-shifting transformer with high-capacity double-device height impedance and additional reactor |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110395984.8A CN113077978A (en) | 2021-04-13 | 2021-04-13 | Novel voltage-regulating phase-shifting transformer with high-capacity double-device height impedance and additional reactor |
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| CN113077978A true CN113077978A (en) | 2021-07-06 |
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| CN202110395984.8A Withdrawn CN113077978A (en) | 2021-04-13 | 2021-04-13 | Novel voltage-regulating phase-shifting transformer with high-capacity double-device height impedance and additional reactor |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113611513A (en) * | 2021-07-23 | 2021-11-05 | 保定天威保变电气股份有限公司 | Phase modulation transformer with large phase shift angle |
| CN114284042A (en) * | 2021-12-14 | 2022-04-05 | 国网江苏省电力有限公司电力科学研究院 | Controllable phase shifter control winding and control method thereof |
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| CN101354956A (en) * | 2008-05-28 | 2009-01-28 | 保定天威集团有限公司 | Large-capacity double-body phase-shifting transformator |
| CN101354957A (en) * | 2008-05-28 | 2009-01-28 | 保定天威集团有限公司 | Large-capacity double-body pressure-regulating phase-shifting transformator |
| KR20130037544A (en) * | 2011-10-06 | 2013-04-16 | 현대중공업 주식회사 | The winding circuit of the phase shifting transformer having the voltage regulating function |
| CN104465053A (en) * | 2014-12-09 | 2015-03-25 | 山东电力设备有限公司 | High-capacity three-phase combined type phase-shift transformer |
| CN111952970A (en) * | 2020-08-17 | 2020-11-17 | 云南电网有限责任公司电力科学研究院 | Power distribution network loop closing and power adjusting method and device |
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2021
- 2021-04-13 CN CN202110395984.8A patent/CN113077978A/en not_active Withdrawn
Patent Citations (6)
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|---|---|---|---|---|
| CN101354956A (en) * | 2008-05-28 | 2009-01-28 | 保定天威集团有限公司 | Large-capacity double-body phase-shifting transformator |
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| KR20130037544A (en) * | 2011-10-06 | 2013-04-16 | 현대중공업 주식회사 | The winding circuit of the phase shifting transformer having the voltage regulating function |
| CN104465053A (en) * | 2014-12-09 | 2015-03-25 | 山东电力设备有限公司 | High-capacity three-phase combined type phase-shift transformer |
| WO2016091123A1 (en) * | 2014-12-09 | 2016-06-16 | 山东电工电气集团有限公司 | High-capacity three-phase combined type phase-shift transformer |
| CN111952970A (en) * | 2020-08-17 | 2020-11-17 | 云南电网有限责任公司电力科学研究院 | Power distribution network loop closing and power adjusting method and device |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113611513A (en) * | 2021-07-23 | 2021-11-05 | 保定天威保变电气股份有限公司 | Phase modulation transformer with large phase shift angle |
| CN114284042A (en) * | 2021-12-14 | 2022-04-05 | 国网江苏省电力有限公司电力科学研究院 | Controllable phase shifter control winding and control method thereof |
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