CN202172247U - Control device for ice melting of high voltage direct current transmission project - Google Patents
Control device for ice melting of high voltage direct current transmission project Download PDFInfo
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- CN202172247U CN202172247U CN 201120299484 CN201120299484U CN202172247U CN 202172247 U CN202172247 U CN 202172247U CN 201120299484 CN201120299484 CN 201120299484 CN 201120299484 U CN201120299484 U CN 201120299484U CN 202172247 U CN202172247 U CN 202172247U
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Abstract
The utility model discloses a control device for ice melting of a high voltage direct current transmission project. An output end of a pole one high-end converting transformer in a high voltage direct current transmission line of a converting station is connected with a pole one high-end converting valve group, an output end of a pole one low-end converting transformer is connected with a pole one low-end converting valve group, an output end of a pole two high-end converting transformer is connected with a pole two high-end converting valve group, and an output end of a pole two low-end converting transformer is connected with a pole two low-end converting valve group. Two ends of the pole one high-end converting valve group are respectively connected to a positive electrode and a negative electrode of the high voltage transmission line, two ends of the pole two high-end converting valve group are respectively connected to the positive electrode and the negative electrode of the high voltage transmission line, two ends of the pole one low-end converting valve group are connected to form a bypass, and two ends of the pole two low-end converting valve group are connected to from a bypass. The control device enables direct current of the converting station to be switched into an ice-melting operation mode in weather conditions of severe ice and snow disasters, thereby achieving ice melting of direct current transmission line, and guaranteeing safe and stable operation of power grids.
Description
Technical field
The utility model relates to the control device of HVDC transmission system ice melting system, refers in particular in ± 800kV extra-high voltage direct-current current conversion station, and the DC control protection system is to satisfy the control device of the dc fields ice-melt that the line ice-melting requirement adopts.
Background technology
To some ± direct current project before the 800kV extra-high voltage direct-current transmission demonstration project in, the ice melting operation mode is not considered in the DC side wiring, under serious snow disaster ice damage weather condition, the safe operation of electrical network is on the hazard.Resist the ability of snow disaster ice damage for strengthening high-voltage fence, require to increase the control device of dc fields ice-melt in the ± 800kV extra-high voltage direct-current transmission demonstration project.
Because the fed distance of extra high voltage direct current transmission line is far away; Intermediate demand is crossed over the zone of the serious icing disaster of a plurality of easy generations, therefore study extra-high voltage direct-current engineering de-icing technology to the reliability that improves extra-high voltage DC transmission system, ensure that its safe and stable operation has great importance.
In the existing de-icing technology scheme, relate to and adopt excess current de-icing technology, short circuit de-icing technology, the de-icing technology of heat-resisting alloy lead etc.Heat-resisting alloy lead de-icing technology is to utilize lead to run on the characteristic of higher temperature; Be applied in the de-icing technology of high voltage power transmisson system circuit, its shortcoming be the lead long-time running in the high-temperature region, thermal losses is bigger; Uneconomical economically; In the line short de-icing technology, if be not with load, the transmission of electricity easy interruption; If band load, short circuit current can cause very big impact to electrical network.In the existing excess current de-icing technology, all be whole circuit no matter whether be with load, its scheme, thermal losses is bigger.In addition, when the homophase of transmission system or at the same levelly adopt the single conductor transmission of electricity, or when adopting the bundle conductor transmission of electricity, adopt existing excess current de-icing technology, all can not reach the requirement of circuit band load operation ice-melt.
Present line ice melting of extra-high voltage DC transmission system technology mainly concentrates on primary system design aspects such as converter series-parallel system, the consideration less to the aspects such as protection of DC control.
Summary of the invention
The purpose of the utility model provide a kind of can be under serious snow disaster ice damage weather condition; Thereby with the current conversion station DC side switch to the ice melting operation pattern realize DC line ice-melt, guarantee the control device of ice-melt of the safe and stable operation of electrical network; It can be under dc fields ice melting operation mode; Cut-offfing and closure of control each isolating switch of dc fields and circuit breaker guarantees the correct enforcement of ice melting operation mode.
For realizing above-mentioned purpose, the utility model adopts following technical scheme:
A kind of control device of high voltage direct current transmission project ice-melt; The utmost point 1 high-end converter transformer output is connected with the utmost point 1 high-end converter valve group in the HVDC transmission line of current conversion station; The utmost point 1 low side converter transformer output is connected with the utmost point 1 low side converter valve group; The utmost point 2 high-end converter transformer outputs are connected with the utmost point 2 high-end converter valve groups; The utmost point 2 low side converter transformer outputs are connected with the utmost point 2 low side converter valve groups, and the two ends of the utmost point 1 high-end converter valve group are connected to the both positive and negative polarity of ultra-high-tension power transmission line respectively, and the two ends of the utmost point 2 high-end converter valve groups are connected to the both positive and negative polarity of ultra-high-tension power transmission line respectively; The two ends of the utmost point 1 low side converter valve group are connected to form bypass, and the two ends of the utmost point 2 low side converter valve groups are connected to form bypass.
Further, the two ends of the said utmost point 1 high-end converter valve group, the utmost point 1 low side converter valve group, the utmost point 2 high-end converter valve groups and the utmost point 2 low side converter valve groups are parallel with circuit breaker.
Further, the two ends of the said utmost point 1 high-end converter valve group, the utmost point 1 low side converter valve group, the utmost point 2 high-end converter valve groups and the utmost point 2 low side converter valve groups are connected in parallel to three isolating switches that are connected in series.
Further, connect through first DC filter between the end of the said utmost point 1 high-end converter valve group one end and the utmost point 1 low side converter valve group, connect through second DC filter between the end of the said utmost point 2 high-end converter valve group one ends and the utmost point 2 low side converter valve groups.
Further; The two ends of said first DC filter are connected to the utmost point 1 high-end converter valve group and the utmost point 1 low side converter valve group through separating switch respectively, and the two ends of second DC filter are connected to the utmost point 2 high-end converter valve groups and the utmost point 2 low side converter valve groups through separating switch respectively.
Further, be connected with isolating switch through the circuit breaker that is connected in series between the said utmost point 1 low side converter valve group and the utmost point 2 low side converter valve groups.
Further, an end of the said utmost point 1 high-end converter valve group is connected to the negative pole of ultra-high-tension power transmission line through isolating switch and ice-melt fracture, and the other end of the utmost point 1 high-end converter valve group is connected to the positive pole of ultra-high-tension power transmission line through isolating switch; One end of the said utmost point 2 high-end converter valve groups is connected to the positive pole of ultra-high-tension power transmission line through isolating switch and ice-melt fracture, and the other end of the utmost point 2 high-end converter valve groups is connected to the negative pole of ultra-high-tension power transmission line through isolating switch;
Further, the said utmost point 1 low side converter valve group and the utmost point 2 low side converter valve groups are through isolating switch and circuit interrupter grounding.
Further, the said utmost point 1 high-end converter valve group and the utmost point 2 high-end converter valve groups are through isolating switch and circuit interrupter grounding.
The utility model is under serious snow disaster ice damage weather condition; The current conversion station DC side is switched to the ice melting operation pattern, thereby realize that DC line operates under the ice-melt mode, DC line is carried out ice-melt; Prevent owing to the too thick incident of falling the tower that causes of icing, thus the safe and stable operation of assurance electrical network.
Description of drawings
Fig. 1 is the structured flowchart sketch map of the utility model.
Fig. 2 is the utility model current conversion station DC side wiring schematic diagram.
Embodiment
Below in conjunction with accompanying drawing and specific embodiment the utility model is done further to describe in detail:
Consult the control device of high voltage direct current transmission project ice-melt shown in Figure 1; The utmost point 1 high-end converter transformer output is connected with the utmost point 1 high-end converter valve group in the HVDC transmission line of current conversion station; The utmost point 1 low side converter transformer output is connected with the utmost point 1 low side converter valve group; The utmost point 2 high-end converter transformer outputs are connected with the utmost point 2 high-end converter valve groups; The utmost point 2 low side converter transformer outputs are connected with the utmost point 2 low side converter valve groups, and the two ends of the utmost point 1 high-end converter valve group are connected to the both positive and negative polarity of ultra-high-tension power transmission line respectively, and the two ends of the utmost point 2 high-end converter valve groups are connected to the both positive and negative polarity of ultra-high-tension power transmission line respectively; The two ends of the utmost point 1 low side converter valve group are connected to form bypass, and the two ends of the utmost point 2 low side converter valve groups are connected to form bypass.
Consult shown in Figure 2; The utmost point 1 high-end converter valve group two ends parallel connection circuit breaker P1.WP.Q1; The utmost point 1 low side converter valve group two ends parallel connection circuit breaker P1.WP.Q2, the utmost point 2 high-end converter valve group two ends parallel connection circuit breaker P2.WP.Q1, the utmost point 2 low side converter valve group two ends parallel connection circuit breaker P2.WP.Q2.After isolating switch P1.WP.Q11, isolating switch P1.WP.Q12, isolating switch P1.WP.Q13 are connected in series; Be connected in parallel on the utmost point 1 high-end converter valve group two ends; After isolating switch P1.WP.Q14, isolating switch P1.WP.Q15, isolating switch P1.WP.Q16 are connected in series, be connected in parallel on the utmost point 1 low side converter valve group two ends; After isolating switch P2.WP.Q11, isolating switch P2.WP.Q12, isolating switch P2.WP.Q13 are connected in series; Be connected in parallel on the utmost point 2 high-end converter valve group two ends; After isolating switch P2.WP.Q14, isolating switch P2.WP.Q15, isolating switch P2.WP.Q16 are connected in series, be connected in parallel on the utmost point 2 low side converter valve group two ends.
The two ends that first DC filter connects are connected in series with isolating switch P1.Z1.Q11 and isolating switch P1.Z1.Q12; Isolating switch P1.Z1.Q11 is connected to the isolating switch P1.WP.Q13 that the utmost point 1 high-end converter valve group one end connects, and isolating switch P1.Z1.Q12 is connected to the isolating switch P1.WP.Q14 that the utmost point 1 low side converter valve group one end connects; The two ends that second DC filter connects are connected in series with isolating switch P2.Z1.Q11 and isolating switch P2.Z1.Q12; Isolating switch P2.Z1.Q11 is connected to the isolating switch P2.WP.Q13 that the utmost point 2 high-end converter valve group one ends connect, and isolating switch P2.Z1.Q12 is connected to the isolating switch P2.WP.Q14 of the end connection of the utmost point 2 low side converter valve groups.
Circuit breaker P1.WN.Q1, isolating switch WN.Q12, isolating switch WN.Q13 and circuit breaker P2.WN.Q1 successively are connected in series between isolating switch P1.WP.Q14 and the isolating switch P2.WP.Q14; Divide circuit of expenditure to be connected with isolating switch WN.Q18, circuit breaker WN.Q3, the isolating switch WN.Q19 that is connected in series successively between isolating switch WN.Q12 and the isolating switch WN.Q13, isolating switch WN.Q17 is connected in the two ends of isolating switch WN.Q18 and isolating switch WN.Q19 in parallel.The end that isolating switch WN.Q19 is connected with isolating switch WN.Q17 is connected to earth electrode through isolating switch WN.Q101 and the isolating switch WN.Q102 that is connected in parallel.
One end of the utmost point 1 high-end converter valve group is connected to the negative pole of ultra-high-tension power transmission line through isolating switch WN.W1.Q12 and ice-melt fracture WN.Q35, and the other end of the utmost point 1 high-end converter valve group is connected to the positive pole of ultra-high-tension power transmission line through isolating switch WN.W1.Q11; The utmost point 1 low side converter valve group is connected to the negative pole of ultra-high-tension power transmission line through circuit breaker P1.WN.Q1, isolating switch WN.Q11, isolating switch WN.Q14, the ice-melt fracture WN.Q32 that is connected in series, and isolating switch WN.Q14 also links to each other with isolating switch WN.Q13.Divide expenditure a circuit between isolating switch WN.Q11, the isolating switch WN.Q14; Be connected in series with isolating switch WN.Q16 and circuit breaker WN.Q2 on this circuit; Circuit breaker WN.Q2 is connected to the negative pole of ultra-high-tension power transmission line through isolating switch WN.W2.Q12, and circuit breaker WN.Q2 is connected to the positive pole of ultra-high-tension power transmission line through ice-melt fracture WN.Q35.Be provided with isolating switch WN.Q15, isolating switch WN.Q1.Q11, the circuit breaker WN.Q15 ground connection of branch road between isolating switch WN.Q14 and the isolating switch WN.Q16 through being connected in series.High-end converter valve group one end of the utmost point 2 connects the other end of the high-end converter valve group of the utmost point 2 through ice-melt fracture P2.WN.Q32, isolating switch P2.WP.Q13, and the other end of the converter valve group that the utmost point 2 is high-end is through an end of the high-end converter valve group of ice-melt fracture P2.WN.Q31, the isolating switch P2.WP.Q11 connection utmost point 2.
Under the ice melting operation mode, the folding condition such as the following table of each isolating switch, circuit breaker and ice-melt fracture in the dc fields among Fig. 2:
Through cut-offfing and closure of circuit breaker, isolating switch and ice-melt fracture in the dc fields wiring; Can realize the high-end converter valve group of the utmost point 1 and the high-end converter valve group parallel connection of the utmost point 2; The low end valve group of the utmost point 1 and the low end valve group of the utmost point 2 are by bypass; Realize the ice-melt of DC line, guarantee the safe and stable operation of electrical network.
Claims (9)
1. the control device of a high voltage direct current transmission project ice-melt; It is characterized in that: the utmost point 1 high-end converter transformer output is connected with the utmost point 1 high-end converter valve group in the HVDC transmission line of current conversion station; The utmost point 1 low side converter transformer output is connected with the utmost point 1 low side converter valve group; The utmost point 2 high-end converter transformer outputs are connected with the utmost point 2 high-end converter valve groups; The utmost point 2 low side converter transformer outputs are connected with the utmost point 2 low side converter valve groups, and the two ends of the utmost point 1 high-end converter valve group are connected to the both positive and negative polarity of ultra-high-tension power transmission line respectively, and the two ends of the utmost point 2 high-end converter valve groups are connected to the both positive and negative polarity of ultra-high-tension power transmission line respectively; The two ends of the utmost point 1 low side converter valve group are connected to form bypass, and the two ends of the utmost point 2 low side converter valve groups are connected to form bypass.
2. the control device of high voltage direct current transmission project ice-melt according to claim 1 is characterized in that: the two ends of the said utmost point 1 high-end converter valve group, the utmost point 1 low side converter valve group, the utmost point 2 high-end converter valve groups and the utmost point 2 low side converter valve groups are parallel with circuit breaker.
3. the control device of high voltage direct current transmission project ice-melt according to claim 1 and 2 is characterized in that: the two ends of the said utmost point 1 high-end converter valve group, the utmost point 1 low side converter valve group, the utmost point 2 high-end converter valve groups and the utmost point 2 low side converter valve groups are connected in parallel to three isolating switches that are connected in series.
4. the control device of high voltage direct current transmission project ice-melt according to claim 3; It is characterized in that: connect through first DC filter between the end of the said utmost point 1 high-end converter valve group one end and the utmost point 1 low side converter valve group, connect through second DC filter between the end of the said utmost point 2 high-end converter valve group one ends and the utmost point 2 low side converter valve groups.
5. the control device of high voltage direct current transmission project ice-melt according to claim 4; It is characterized in that: the two ends of said first DC filter are connected to the utmost point 1 high-end converter valve group and the utmost point 1 low side converter valve group through separating switch respectively, and the two ends of second DC filter are connected to the utmost point 2 high-end converter valve groups and the utmost point 2 low side converter valve groups through separating switch respectively.
6. the control device of high voltage direct current transmission project ice-melt according to claim 4 is characterized in that: be connected with isolating switch through the circuit breaker that is connected in series between the said utmost point 1 low side converter valve group and the utmost point 2 low side converter valve groups.
7. the control device of high voltage direct current transmission project ice-melt according to claim 1; It is characterized in that: an end of the said utmost point 1 high-end converter valve group is connected to the negative pole of ultra-high-tension power transmission line through isolating switch and ice-melt fracture, and the other end of the utmost point 1 high-end converter valve group is connected to the positive pole of ultra-high-tension power transmission line through isolating switch; One end of the said utmost point 2 high-end converter valve groups is connected to the positive pole of ultra-high-tension power transmission line through isolating switch and ice-melt fracture, and the other end of the utmost point 2 high-end converter valve groups is connected to the negative pole of ultra-high-tension power transmission line through isolating switch;
8. the control device of high voltage direct current transmission project ice-melt according to claim 1 is characterized in that: the said utmost point 1 low side converter valve group and the utmost point 2 low side converter valve groups are through isolating switch and circuit interrupter grounding.
9. the control device of high voltage direct current transmission project ice-melt according to claim 1 is characterized in that: the said utmost point 1 high-end converter valve group and the utmost point 2 high-end converter valve groups are through isolating switch and circuit interrupter grounding.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201120299484 CN202172247U (en) | 2011-08-17 | 2011-08-17 | Control device for ice melting of high voltage direct current transmission project |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201120299484 CN202172247U (en) | 2011-08-17 | 2011-08-17 | Control device for ice melting of high voltage direct current transmission project |
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| Publication Number | Publication Date |
|---|---|
| CN202172247U true CN202172247U (en) | 2012-03-21 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201120299484 Expired - Fee Related CN202172247U (en) | 2011-08-17 | 2011-08-17 | Control device for ice melting of high voltage direct current transmission project |
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| CN (1) | CN202172247U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103296630A (en) * | 2013-06-21 | 2013-09-11 | 国家电网公司 | Rapid wiring conversion device for ice melting of rural distribution power grid transmission line |
| CN104714138A (en) * | 2015-04-10 | 2015-06-17 | 国家电网公司 | Current and voltage rise testing system for ultra-high voltage direct-current deicing device |
-
2011
- 2011-08-17 CN CN 201120299484 patent/CN202172247U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103296630A (en) * | 2013-06-21 | 2013-09-11 | 国家电网公司 | Rapid wiring conversion device for ice melting of rural distribution power grid transmission line |
| CN104714138A (en) * | 2015-04-10 | 2015-06-17 | 国家电网公司 | Current and voltage rise testing system for ultra-high voltage direct-current deicing device |
| CN104714138B (en) * | 2015-04-10 | 2016-03-09 | 国家电网公司 | Extra-high voltage direct-current deicing device up-flow pressure build-up test system |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C56 | Change in the name or address of the patentee |
Owner name: CENTRAL SOUTHERN CHINA ELECTRIC POWER DESIGN INSTI Free format text: FORMER NAME: CENTRAL SOUTHERN CHINA ELECTRIC POWER DESIGN INSTITUTE, CHINA POWER ENGINEERING CONSULTING GROUP COR |
|
| CP03 | Change of name, title or address |
Address after: 430071 Wuchang District, Hubei, South Central Road No. two, No. 12, No. Patentee after: Co., Ltd of Central Southern China Electric Power Design Institute, China Power Engineering Consulting Group Corporation Patentee after: CHINA POWER ENGINEERING CONSULTING (GROUP) CORPORATION Patentee after: China Power Engineering Consulting Group Southwest Electric Power Design Institute Co., Ltd. Patentee after: Co., Ltd of Huabei Power Design Inst., China Power Engineering Consulting Group Patentee after: NORTHWEST ELECTRIC POWER DESIGN INSTITUTE CO., LTD. OF CHINA POWER ENGINEERING CONSULTING GROUP Address before: 430071 No. 668, democracy Road, Wuchang District, Hubei, Wuhan Patentee before: Central Southern China Electric Power Design Institute, China Power Engineering Consulting Group Cor Patentee before: China Power Engineering Consulting Group Corporation Patentee before: Southwest Electric Power Design Institute of China Power Engineering Consulting Group Corporation Patentee before: Huabei Power Design Inst., China Power Engineering Consulting Group Patentee before: Northwest Electric Power Design Institute, China Power Engineering Consulting Group Corporation |
|
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20120321 Termination date: 20170817 |