CN203193277U - DC power transmission system - Google Patents
DC power transmission system Download PDFInfo
- Publication number
- CN203193277U CN203193277U CN 201320142151 CN201320142151U CN203193277U CN 203193277 U CN203193277 U CN 203193277U CN 201320142151 CN201320142151 CN 201320142151 CN 201320142151 U CN201320142151 U CN 201320142151U CN 203193277 U CN203193277 U CN 203193277U
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- Prior art keywords
- smoothing reactor
- resistance
- filter
- connects
- transmission line
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- Direct Current Feeding And Distribution (AREA)
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Abstract
The utility model discloses a dc power transmission system, which comprises a first breaker, a first converter transformer, a rectifier, a first smoothing reactor, a dc transmission line, a second smoothing reactor, an inverter, a second converter transformer and a second breaker, a passive filter connected with a connecting end of the first breaker and the first converter transformer, a first lightning arrester and a first dc filter connected with a connected end of the first smoothing reactor and the dc transmission line, and a second dc filter and a second lightning arrester connected with a connected end of the dc transmission line and the second smoothing reactor. The dc power transmission system can effectively avoid occurrence cascading failure, and is safe and reliable.
Description
Technical field
The utility model relates to a kind of DC transmission system.
Background technology
Traditional DC transmission system has that cost is low, loss is little, etc. advantage, but cascading failure appears easily.The relevant cascading failure cause of DC transmission system is mainly voltage collapse, frequency collapse and overload chain reaction, refer to respectively: 1) the direct current system self reason causes DC line inverter generation commutation failure, can cause one pole locking even bipolar locking fault under the situation of failing in time to fix a breakdown.2) receiving end electrical network AC system breaks down, and makes direct current system change of current busbar voltage descend, thereby causes DC line inverter generation commutation failure, also may cause one pole locking even bipolar locking fault under the situation of failing in time to fix a breakdown.When 3) breaking down with the alternating current circuit of DC line paired running, originally by the power transfer of alternating current circuit transmission on DC line, might cause overload, direct current locking under the serious situation.Therefore, studying a kind of DC transmission system that can effectively avoid cascading failure, is the direction that the applicant is devoted to make great efforts.
Summary of the invention
The purpose of this utility model is to provide a kind of DC transmission system, can effectively avoid the generation of cascading failure, and is safe and reliable.Simultaneously, each filter and reactor by increasing make electric power transfer more efficient.
The technical scheme that realizes above-mentioned purpose is:
A kind of DC transmission system, be connected between first AC system and second AC system, described DC transmission system comprises first circuit breaker, passive filter, first converter transformer, rectifier, first smoothing reactor, first lightning arrester, first DC filter, DC transmission line, second DC filter, second lightning arrester, second smoothing reactor, inverter, second converter transformer and second circuit breaker, wherein:
Described first AC system, first circuit breaker, first converter transformer, rectifier, first smoothing reactor, DC transmission line, second smoothing reactor, inverter, second converter transformer, second circuit breaker and second AC system are connected in series successively;
Described passive filter connects join end and the ground connection of described first circuit breaker and first converter transformer;
Described first lightning arrester connects join end and the ground connection of described first smoothing reactor and DC transmission line;
Described first DC filter connects join end and the ground connection of described first smoothing reactor and DC transmission line;
Described second DC filter connects join end and the ground connection of described DC transmission line and second smoothing reactor;
Described second lightning arrester connects join end and the ground connection of described DC transmission line and second smoothing reactor.
Above-mentioned DC transmission system, wherein, described passive filter comprises first electric capacity, first resistance and first inductance,
Described first electric capacity, one end connects the end that joins of described first circuit breaker and first converter transformer, and the other end connects described first resistance, first grounding through resistance;
Described first inductance is in parallel with described first resistance.
Above-mentioned DC transmission system, wherein, described first DC filter comprises second electric capacity, second inductance and second resistance,
Described second electric capacity, one end connects the end that joins of described first smoothing reactor and DC transmission line, and the other end connects described second inductance;
Described second inductance connects described second resistance, second grounding through resistance.
Above-mentioned DC transmission system, wherein, described second DC filter comprises the 3rd electric capacity, the 3rd inductance and the 3rd resistance,
Described the 3rd electric capacity one end connects the end that joins of described DC transmission line and second smoothing reactor, and the other end connects described the 3rd inductance;
Described the 3rd inductance connects described the 3rd resistance, the 3rd grounding through resistance.
The beneficial effects of the utility model are: the utility model can effectively be avoided the generation of traditional DC transmission system cascading failure by effective configuration of passive filter, DC filter and smoothing reactor, and is safe and reliable.Simultaneously, each filter and the reactor of the utility model by increasing makes electric power transfer efficient quick more, and effectively reduces electric network pollution.
Description of drawings
Fig. 1 is the structural representation of DC transmission system of the present utility model.
Embodiment
The utility model is described in further detail below in conjunction with accompanying drawing.
See also Fig. 1, DC transmission system of the present utility model, be connected between first AC system 100 and second AC system 200, DC transmission system of the present utility model comprises first circuit breaker 1, passive filter 2, first converter transformer 3, rectifier 4, first smoothing reactor 5, first lightning arrester 6, first DC filter 7, DC transmission line 8, second DC filter 9, second lightning arrester 10, second smoothing reactor 11, inverter 12, second converter transformer 13 and second circuit breaker 14, wherein:
First AC system 100, first circuit breaker 1, first converter transformer 3, rectifier 4, first smoothing reactor 5, DC transmission line 8, second smoothing reactor 11, inverter 12, second converter transformer 13, second circuit breaker 14 and second AC system 200 are connected in series successively; In the present embodiment, the model that rectifier 4 is selected for use is DYXL-LSI-100; The model that inverter is selected for use is MI-75W;
Passive filter 2 connects join end and the ground connection of first circuit breaker 1 and first converter transformer 3;
First lightning arrester 6 connects join end and the ground connection of first smoothing reactor 5 and DC transmission line 8;
First DC filter 7 connects join end and the ground connection of first smoothing reactor 5 and DC transmission line 8;
Second DC filter 9 connects join end and the ground connection of DC transmission line 8 and second smoothing reactor 11;
Second lightning arrester 10 connects join end and the ground connection of DC transmission line 8 and second smoothing reactor 11.
In the present embodiment, passive filter 2 comprises first electric capacity 21, first resistance 22 and first inductance 23; One end of first electric capacity 21 connects the end that joins of first circuit breaker 1 and first converter transformer 3, and the other end of first electric capacity 21 connects first resistance, 22, the first resistance, 22 ground connection; First inductance 23 is in parallel with first resistance 22.
In the present embodiment, first DC filter 7 comprises that an end of second electric capacity 71, second inductance 72 and second resistance, 73, the second electric capacity 71 connects the end that joins of first smoothing reactor 5 and DC transmission line 8, and the other end of second electric capacity 71 connects second inductance 72; Second inductance 72 connects second resistance, 73, the second resistance, 73 ground connection.
In the present embodiment, second DC filter 9 comprises that an end of the 3rd electric capacity 91, the 3rd inductance 92 and the 3rd resistance 93, the three electric capacity 91 connects the end that joins of DC transmission line 8 and second smoothing reactor 11, and the other end of the 3rd electric capacity 91 connects the 3rd inductance 92; The 3rd inductance 92 connects the 3rd resistance 93, the three resistance 93 ground connection.
To sum up, the generation of traditional DC transmission system cascading failure has effectively been avoided in the effective configuration of the utility model by passive filter, DC filter and smoothing reactor, makes electric power transfer efficient quick more, and effectively reduces electric network pollution.
Claims (4)
1. DC transmission system, be connected between first AC system (100) and second AC system (200), it is characterized in that, described DC transmission system comprises first circuit breaker (1), passive filter (2), first converter transformer (3), rectifier (4), first smoothing reactor (5), first lightning arrester (6), first DC filter (7), DC transmission line (8), second DC filter (9), second lightning arrester (10), second smoothing reactor (11), inverter (12), second converter transformer (13) and second circuit breaker (14), wherein:
Described first AC system (100), first circuit breaker (1), first converter transformer (3), rectifier (4), first smoothing reactor (5), DC transmission line (8), second smoothing reactor (11), inverter (12), second converter transformer (13), second circuit breaker (14) and second AC system (200) are connected in series successively;
Described passive filter (2) connects join end and the ground connection of described first circuit breaker (1) and first converter transformer (3);
Described first lightning arrester (6) connects join end and the ground connection of described first smoothing reactor (5) and DC transmission line (8);
Described first DC filter (7) connects join end and the ground connection of described first smoothing reactor (5) and DC transmission line (8);
Described second DC filter (9) connects join end and the ground connection of described DC transmission line (8) and second smoothing reactor (11);
Described second lightning arrester (10) connects join end and the ground connection of described DC transmission line (8) and second smoothing reactor (11).
2. DC transmission system according to claim 1 is characterized in that, described passive filter (2) comprises first electric capacity (21), first resistance (22) and first inductance (23), wherein:
Described first electric capacity (21) one ends connect the end that joins of described first circuit breaker (1) and first converter transformer (3), and the other end connects described first resistance (22), first resistance (22) ground connection;
Described first inductance (23) is in parallel with described first resistance (22).
3. DC transmission system according to claim 1 is characterized in that, described first DC filter (7) comprises second electric capacity (71), second inductance (72) and second resistance (73), wherein:
Described second electric capacity (71) one ends connect the end that joins of described first smoothing reactor (5) and DC transmission line (8), and the other end connects described second inductance (72);
Described second inductance (72) connects described second resistance (73), second resistance (73) ground connection.
4. DC transmission system according to claim 1 is characterized in that, described second DC filter (9) comprises the 3rd electric capacity (91), the 3rd inductance (92) and the 3rd resistance (93), wherein:
Described the 3rd electric capacity (91) one ends connect the end that joins of described DC transmission line (8) and second smoothing reactor (11), and the other end connects described the 3rd inductance (92);
Described the 3rd inductance (92) connects described the 3rd resistance (93), the 3rd resistance (93) ground connection.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320142151 CN203193277U (en) | 2013-03-26 | 2013-03-26 | DC power transmission system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320142151 CN203193277U (en) | 2013-03-26 | 2013-03-26 | DC power transmission system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203193277U true CN203193277U (en) | 2013-09-11 |
Family
ID=49110107
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201320142151 Expired - Lifetime CN203193277U (en) | 2013-03-26 | 2013-03-26 | DC power transmission system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203193277U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103187725A (en) * | 2013-03-26 | 2013-07-03 | 国家电网公司 | Direct current power transmission system |
-
2013
- 2013-03-26 CN CN 201320142151 patent/CN203193277U/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103187725A (en) * | 2013-03-26 | 2013-07-03 | 国家电网公司 | Direct current power transmission system |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20130911 |
|
| CX01 | Expiry of patent term |