RU2505903C1 - Intergrated apparatus for compensation of reactive power and melting ice cover (version) - Google Patents
Intergrated apparatus for compensation of reactive power and melting ice cover (version) Download PDFInfo
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- RU2505903C1 RU2505903C1 RU2012124470/07A RU2012124470A RU2505903C1 RU 2505903 C1 RU2505903 C1 RU 2505903C1 RU 2012124470/07 A RU2012124470/07 A RU 2012124470/07A RU 2012124470 A RU2012124470 A RU 2012124470A RU 2505903 C1 RU2505903 C1 RU 2505903C1
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- melting
- mode
- ice
- reactive power
- pole switch
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- 238000002844 melting Methods 0.000 title claims abstract description 34
- 239000003990 capacitor Substances 0.000 claims abstract description 12
- 239000004065 semiconductors Substances 0.000 claims abstract description 12
- 238000009434 installation Methods 0.000 claims description 8
- 239000003570 air Substances 0.000 claims description 2
- 238000010309 melting process Methods 0.000 abstract description 4
- 230000000694 effects Effects 0.000 abstract description 3
- 239000000126 substances Substances 0.000 abstract 1
- 281999990011 institutions and organizations companies 0.000 description 3
- 230000000051 modifying Effects 0.000 description 2
- 230000001105 regulatory Effects 0.000 description 2
- 230000003068 static Effects 0.000 description 2
- 238000004804 winding Methods 0.000 description 2
- 241000270295 Serpentes Species 0.000 description 1
- 238000003723 Smelting Methods 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 238000010586 diagrams Methods 0.000 description 1
- 238000004870 electrical engineering Methods 0.000 description 1
- 238000005516 engineering processes Methods 0.000 description 1
- 239000000686 essences Substances 0.000 description 1
- 239000003138 indicators Substances 0.000 description 1
- 239000000155 melts Substances 0.000 description 1
- 230000000737 periodic Effects 0.000 description 1
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E40/00—Technologies for an efficient electrical power generation, transmission or distribution
- Y02E40/30—Reactive power compensation
Abstract
Description
Technical field
The invention relates to the field of electrical engineering and can be used in electrical substations.
State of the art
With the development of power semiconductor technology in the electric power industry, static devices for reactive power compensation (STATCOMs) made on the basis of voltage converters on fully controlled power electronics devices shunted by reverse diodes (see, for example, Kochkin V.I., Nechaev O.P. Application of static reactive power compensators in electric networks of power systems and enterprises. - M.: Publishing House NTs ENAS, 2000). Due to their high speed, as well as the use of pulse width modulation (PWM), STATCOMs can effectively maintain the required quality indicators of electricity in power supply systems.
Another important technical task aimed at improving the reliability of power supply to consumers is the regulated melting of ice on overhead power lines (VL). To solve it, a variety of converters are used, also made on semiconductor power key elements. However, they are used for their intended purpose for a relatively short time, only during periods of icing. In this regard, it is advisable to combine the functions of reactive power compensation and ice melting in one device to save capital costs in connection with a reduction in the total amount of equipment installed at the substation.
Known combined installations for reactive power compensation and ice melting (KRM-PG), made on the basis of a three-phase bridge converter (two or three-level) on fully controllable power semiconductor devices - IGBT or lockable thyristors (see US Pat. No. 6433520; publ. 13.08 .2002; Pat RU No. 2376692; claimed. 09.06.2008; publ. 12/20/2009. Bull. No. 35).
SUMMARY OF THE INVENTION
The converter contains three arms on series-connected fully controllable semiconductor gates, shunted by on-board diodes. When implementing STATCOM, an AC converter through the first three-pole switch and a reactor group of two three-phase inductors is connected to a three-phase winding of the power transformer, and a capacitor bank acting as a constant voltage source is connected to the DC output of the converter. In parallel with one of the three-phase reactors, a second three-pole switch is connected, the contacts of which are open when the device is in reactive power compensation mode.
When melting ice, the converter is transferred from compensation mode to controlled rectifier mode, with an output connected via a two-pole switch or two single-pole VL wires switches, on which ice is smelted with direct current. The contacts of the second three-pole switch are closed in this mode.
The advantage of using direct current is the ability to melt ice on long lines. However, with the recommended melting schemes: “snake”, “wire - two wires”, “wire-wire” (see Guidelines for melting ice with direct current. Part 2. - M .: MU 34-70-028-82, 1983) requires the use of additional high-voltage switches placed at both ends of the line, with their periodic switching during the melting process, which significantly complicates the organization of ice melting, increases the melting time, and requires additional capital costs for external switching equipment.
The technical effect of the invention is to simplify the organization and reduce the duration of the ice melting process through the combined installation of KRM-PG with a simultaneous reduction in the number of additional switching equipment.
To achieve this effect, with the help of additional switches, AC voltage regulators are formed from semiconductor switches of the converter for controlled melting of ice on overhead lines with alternating current. In this case, ice smelting is carried out simultaneously on three wires closed at the opposite end of the line.
The implementation of the invention in view of its development
The essence of the invention is illustrated by drawings, where Figs. 1-3 show schematic diagrams of variants of the proposed KRM-PG installation, and Fig. 4 shows graphs of the voltage changes at the terminals of the overhead line wires for melting ice when adjusting the effective value of the melting current by changing the duration of the flow periods current and currentless pauses.
The proposed combined installation for reactive power compensation and ice melting is made on the basis of a bridge converter containing three arms 1-3 on series-connected fully controllable semiconductor switches - IGBT transistors, shunted by on-board diodes. On the AC side, the converter is connected to the three phases A, B, C of the secondary winding of the transformer or the AC network through the first three-pole switch 4 and three-phase inductors 5, 6, in parallel with one of which the second three-pole switch 7. is connected. A capacitor is connected to the DC output of the converter battery 8.
According to the first embodiment of the installation (Figs. 1 and 2), in the reactive power compensation mode, the capacitor battery 8 is connected by the contacts of the third three-pole switch 9, open in the ice melting mode, with the emitter (collector) terminals of the converter valves, which in this mode by the fourth three-pole switch 10 connected to the wires of the overhead line for controlled melting of ice on them with alternating current.
According to the second variant (Fig. 3), in the reactive power compensation mode, the capacitor bank 8 is connected by the contacts of the third 9 and fourth 11 three-pole switches, open in the ice melting mode, with the emitter and collector terminals of the converter valves, which in this mode by means of the fifth 10 and sixth 12 three-pole circuit breakers are connected to the wires of the first and second overhead lines for simultaneous controlled melting of ice on them with alternating current.
Installation works as follows.
In reactive power compensation mode, when the angle of control of semiconductor switches α is slightly less than 180 °, the converter consumes active power from the AC network to cover losses in the converter elements in order to maintain voltage at the terminals of the capacitor bank, which in this mode performs the functions of a DC power source . Moreover, on the AC side, the converter forms an alternating three-phase voltage U P , the first harmonic of which is shifted with respect to the phase voltages of the AC source by an angle β = 180 ° -α. If the amplitude of the first harmonic of the voltage U P exceeds the amplitude of the alternating voltage of the alternating current source, the converter generates reactive power into the network, if on the contrary, the converter loads the network with reactive power. By changing the high-frequency PWM coefficient, the amplitude of the first harmonic of the voltage U P is regulated, and therefore, the magnitude and direction of transmission of reactive power through the converter.
In the STATCOM mode, the contacts of the three-pole switch 7 are open.
For melting ice with alternating current in a combined installation according to the first embodiment, the contacts of the three-pole switch 9 are opened, and the emitter (collector) terminals of the converter valves with the contacts of the three-pole switch 10 are connected to the overhead wires closed at the opposite end of the line.
According to the second variant of the combined KRM-PG device in the ice melting mode by alternating current, the contacts of switches 9, 11 are opened, and by means of switches 10, 12, the wires VL1 and VL2 are connected to the semiconductor switches of the converter, simultaneously melting the ice on two air lines.
The required melting current can be set and, if necessary, automatically maintained by changing the modulation coefficient of the high-frequency PWM or by changing the semiconductor switch state control signals for the durations of the current flow periods T1 and non-current breaks T2, as shown in Fig. 4.
To more efficiently use the power of the converter in the ice melting mode, a three-phase reactor 6 is shunted by the contacts of a three-pole switch 7.
In contrast to direct ice melting, controlled alternating current melting is carried out simultaneously on all overhead lines and requires only a short circuit at the opposite end of the line, which greatly simplifies the organization and reduction of the melting process while reducing the number of additional switching equipment.
Claims (2)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| RU2012124470/07A RU2505903C1 (en) | 2012-06-14 | 2012-06-14 | Intergrated apparatus for compensation of reactive power and melting ice cover (version) |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| RU2012124470/07A RU2505903C1 (en) | 2012-06-14 | 2012-06-14 | Intergrated apparatus for compensation of reactive power and melting ice cover (version) |
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| Publication Number | Publication Date |
|---|---|
| RU2012124470A RU2012124470A (en) | 2013-12-20 |
| RU2505903C1 true RU2505903C1 (en) | 2014-01-27 |
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| RU2012124470/07A RU2505903C1 (en) | 2012-06-14 | 2012-06-14 | Intergrated apparatus for compensation of reactive power and melting ice cover (version) |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103915808A (en) * | 2014-03-07 | 2014-07-09 | 南方电网科学研究院有限责任公司 | Direct current deicing device based on voltage source type converter and control method thereof |
| CN104701796A (en) * | 2015-03-27 | 2015-06-10 | 国家电网公司 | Intensive type DC de-icing device topology structure |
| CN104810801A (en) * | 2015-04-28 | 2015-07-29 | 中国南方电网有限责任公司超高压输电公司检修试验中心 | Tubular bus current differential protection method applicable to direct-current ice melting system rectifying device |
| CN106684795A (en) * | 2015-11-10 | 2017-05-17 | 云南电网有限责任公司昭通供电局 | Direct current deicing apparatus based on three-phase bridge type full-control structure |
| RU2621068C1 (en) * | 2016-07-06 | 2017-05-31 | Акционерное общество "Научно-технический центр Федеральной сетевой компании Единой энергетической системы" | Reactive power compensation and ice-melting combination device on the basis of the driven shunt reactor transformer |
| CN107181263A (en) * | 2016-12-12 | 2017-09-19 | 南京南瑞继保电气有限公司 | The DC ice melting of zero load test and SVC major loop and method to set up can be achieved |
| CN109193536A (en) * | 2018-09-21 | 2019-01-11 | 国网湖南省电力有限公司 | The intensive high-power reactive compensation system of DC de-icing device |
| RU2729039C1 (en) * | 2019-11-19 | 2020-08-04 | Федеральное государственное бюджетное образовательное учреждение высшего образования "Казанский государственный энергетический университет" (ФГБОУ ВО "КГЭУ") | Combined ice melting system and load curve smoothing using energy accumulators based on storage batteries and high-power supercapacitors contained in an autonomous power plant |
| RU2729200C1 (en) * | 2019-11-20 | 2020-08-05 | Федеральное государственное бюджетное образовательное учреждение высшего образования "Казанский государственный энергетический университет" (ФГБОУ ВО "КГЭУ") | Combined glaze ice melting system and load curve smoothing using energy accumulators based on storage batteries and high-power supercapacitors contained in autonomous power plant assembly |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6433520B1 (en) * | 2001-05-29 | 2002-08-13 | Siemens Power Transmission & Distribution Inc | Dc power regulator incorporating high power ac to dc converter with controllable dc voltage and method of use |
| RU2316867C1 (en) * | 2006-08-11 | 2008-02-10 | Открытое Акционерное Общество "Федеральная Сетевая Компания Единой Энергетической Системы" (Оао "Фск Еэс") | Combinatorial ice melting and reactive power correcting installation |
| RU2376692C1 (en) * | 2008-06-09 | 2009-12-20 | Открытое акционерное общество "Научно-исследовательский институт по передаче электроэнергии постоянным током высокого напряжения" (ОАО "НИИПТ") | Combined plant for glase ice and reactive power compensation |
-
2012
- 2012-06-14 RU RU2012124470/07A patent/RU2505903C1/en active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6433520B1 (en) * | 2001-05-29 | 2002-08-13 | Siemens Power Transmission & Distribution Inc | Dc power regulator incorporating high power ac to dc converter with controllable dc voltage and method of use |
| RU2316867C1 (en) * | 2006-08-11 | 2008-02-10 | Открытое Акционерное Общество "Федеральная Сетевая Компания Единой Энергетической Системы" (Оао "Фск Еэс") | Combinatorial ice melting and reactive power correcting installation |
| RU2376692C1 (en) * | 2008-06-09 | 2009-12-20 | Открытое акционерное общество "Научно-исследовательский институт по передаче электроэнергии постоянным током высокого напряжения" (ОАО "НИИПТ") | Combined plant for glase ice and reactive power compensation |
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103915808A (en) * | 2014-03-07 | 2014-07-09 | 南方电网科学研究院有限责任公司 | Direct current deicing device based on voltage source type converter and control method thereof |
| CN104701796A (en) * | 2015-03-27 | 2015-06-10 | 国家电网公司 | Intensive type DC de-icing device topology structure |
| CN104701796B (en) * | 2015-03-27 | 2016-04-27 | 国家电网公司 | A kind of intensive DC de-icing device topological structure |
| CN104810801A (en) * | 2015-04-28 | 2015-07-29 | 中国南方电网有限责任公司超高压输电公司检修试验中心 | Tubular bus current differential protection method applicable to direct-current ice melting system rectifying device |
| CN104810801B (en) * | 2015-04-28 | 2017-07-11 | 中国南方电网有限责任公司超高压输电公司检修试验中心 | Suitable for the pipe bus current differential protecting method of direct current ice melting system fairing |
| CN106684795A (en) * | 2015-11-10 | 2017-05-17 | 云南电网有限责任公司昭通供电局 | Direct current deicing apparatus based on three-phase bridge type full-control structure |
| RU2621068C1 (en) * | 2016-07-06 | 2017-05-31 | Акционерное общество "Научно-технический центр Федеральной сетевой компании Единой энергетической системы" | Reactive power compensation and ice-melting combination device on the basis of the driven shunt reactor transformer |
| CN107181263A (en) * | 2016-12-12 | 2017-09-19 | 南京南瑞继保电气有限公司 | The DC ice melting of zero load test and SVC major loop and method to set up can be achieved |
| CN109193536A (en) * | 2018-09-21 | 2019-01-11 | 国网湖南省电力有限公司 | The intensive high-power reactive compensation system of DC de-icing device |
| RU2729039C1 (en) * | 2019-11-19 | 2020-08-04 | Федеральное государственное бюджетное образовательное учреждение высшего образования "Казанский государственный энергетический университет" (ФГБОУ ВО "КГЭУ") | Combined ice melting system and load curve smoothing using energy accumulators based on storage batteries and high-power supercapacitors contained in an autonomous power plant |
| RU2729200C1 (en) * | 2019-11-20 | 2020-08-05 | Федеральное государственное бюджетное образовательное учреждение высшего образования "Казанский государственный энергетический университет" (ФГБОУ ВО "КГЭУ") | Combined glaze ice melting system and load curve smoothing using energy accumulators based on storage batteries and high-power supercapacitors contained in autonomous power plant assembly |
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| Publication number | Publication date |
|---|---|
| RU2012124470A (en) | 2013-12-20 |
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