CN105244872A - Medium voltage cable network networking method - Google Patents
Medium voltage cable network networking method Download PDFInfo
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- CN105244872A CN105244872A CN201510692233.7A CN201510692233A CN105244872A CN 105244872 A CN105244872 A CN 105244872A CN 201510692233 A CN201510692233 A CN 201510692233A CN 105244872 A CN105244872 A CN 105244872A
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Abstract
The invention provides a medium voltage cable network networking method. The method comprises the steps that 1, a 10KV bus of two substations or different 10KV buses of the same substation in the same power supply area are used as a power supply, wherein lines contact with each other to form a looped network and carry out open-loop operation; 2, a contact normally open point is arranged at each looped network point; and 3, two contact normally open points of each line are arranged in different ring main units, and a contact normally open point in the middle of the line is arranged at the halving point of a line load. When a cable network provided by the invention is in normal operation, each line load is connected with the accessed bus. When a fault occurs, the contact normally open points of the looped network points on both sides of the fault point carry out fault isolation. A load in front of the fault point is connected with an originally accessed bus. A load behind the fault point is connected with a bus which accesses a group line. In a high-reliability power supply area, if a medium voltage cable network networking method is unable to transit to a standard double looped network, the power supply reliability can be improved through the networking method provided by the invention.
Description
Technical field
The present invention relates to power domain, particularly relate to that a kind of mode of connection is simple, operational mode flexibly and the network-building method of the high midium voltage cable net of power supply reliability.
Background technology
Along with the development in city and the raising of living standards of the people, demand for electric energy grows with each passing day, the power distribution network of China also have passed through construction for many years and transformation for this reason, but power distribution network basis is still comparatively weak, the grid structure of medium voltage distribution network lacks the management of specification, contradiction between the reliability that power distribution network is powered and user's request, the typical wiring pattern of midium voltage cable net of the prior art comprises radiant type, list (two) ring type.
Wherein radiant type wiring can be divided into injection formula and twinshot two kinds of forms, is illustrated in figure 1 the schematic diagram of injection formula.The wiring of so-called injection formula refers to that a medium-voltage line only possesses single-side power, powers radially.This mode of connection power supply reliability is poor, when main cable breaks down, will lose part or all of load, does not meet the requirement of " N-1 ".So-called dijection net in essence by two independently injection net walk abreast and form, easilier than injection net provide double loop power supply to power for user.
So-called monocyclic wiring refers to that two medium-voltage lines from different electrical power are got in touch with mutually, forms looped network, open loop operation, as shown in Figure 2.During arbitrary section of main cable fault, excised by faulty section by network reconfiguration, and recover the power supply to non-faulting section, load loss is less.So-called dual-ring network in essence by two independently Single-ring network walk abreast and form, easilier than Single-ring network provide double loop power supply for user.
In the application of reality, at high reliability power supply area by the impact of the factor such as history rack and outside construction condition, the networking mode of midium voltage cable net cannot to the dual-ring network transition of standard time, the power supply reliability of power distribution network also exists serious problem.
Summary of the invention
In order to overcome the problems referred to above, the present invention proposes a kind of network-building method of midium voltage cable net so that at high reliability power supply area, the networking mode of midium voltage cable net cannot to the dual-ring network transition of standard time, improve the reliability of power supply, meet need for electricity.
To achieve these goals, the present invention proposes a kind of network-building method of midium voltage cable net, described network-building method comprises the following steps: step 1: fetch from the 10KV bus of the Liang Ge transformer station of same power supply area or the different 10KV buses of same transformer station as power supply, each loop line road is got in touch with mutually, form looped network, open loop operation; Step 2: contact is set at each looped network point and often makes war; Step 3: two of every loop line road normal battles of contact are arranged in different ring main units, and the contact in circuit stage casing is often made war be arranged on the position of line load Along ent.
Preferably, described contact is often made war is two on-load switches or circuit breaker.
The beneficial effect of the program of the present invention is that the network-building method mode of connection of above-mentioned midium voltage cable net is simple, operational mode is flexible, reliability is high, the cable system set up according to the method is when normally running, each line load is by the bus tape splicing accessed separately, when breaking down, Fault Isolation is carried out by the on-load switch (circuit breaker) of both sides, fault point looped network point, fault point leading portion load is by former access bus tape splicing, the bus tape splicing that fault point back-end load is accessed by group's circuit, at high reliability power supply area, the networking mode of midium voltage cable net cannot to the dual-ring network transition of standard time, the network-building method of midium voltage cable net involved in the present invention can improve the reliability of power supply, meet need for electricity.
Accompanying drawing explanation
Fig. 1 shows the schematic diagram of the injection formula Connection Mode of midium voltage cable net of the prior art.
Fig. 2 shows the schematic diagram of the monocyclic Connection Mode of midium voltage cable net of the prior art.
Fig. 3 shows the flow chart of the network-building method of midium voltage cable net involved in the present invention.
Fig. 4 shows the first embodiment schematic diagram of the cable system set up according to the network-building method of midium voltage cable net involved in the present invention.
Fig. 5 shows the second embodiment schematic diagram of the cable system set up according to the network-building method of midium voltage cable net involved in the present invention.
Fig. 6 shows the 3rd embodiment schematic diagram of the cable system set up according to the network-building method of midium voltage cable net involved in the present invention.
Embodiment
Below in conjunction with accompanying drawing, the specific embodiment of the present invention is further described.
As shown in Figure 3, the network-building method of midium voltage cable net involved in the present invention comprises following step:
Step 1: fetch from the 10KV bus of the Liang Ge transformer station of same power supply area or the different 10KV buses of same transformer station as power supply, each loop line road is got in touch with mutually, form looped network, open loop operation, as shown in the step S1 in Fig. 3.
Step 2: arrange contact at each looped network point and often make war, i.e. two on-load switches or circuit breaker, as shown in the step S2 in Fig. 3.
Step 3: two of every loop line road normal battles of contact are arranged in different ring main units, and the contact in circuit stage casing is often made war be arranged on the position of line load Along ent, as shown in the step S3 in Fig. 3.
The schematic diagram of cable system of Fig. 4-6 for setting up according to the network-building method of midium voltage cable net involved in the present invention.Be described for Fig. 4 below, first substation bus bar A, substation bus bar B and substation bus bar C are the different 10KV buses of 10KV bus from the Liang Ge transformer station of same power supply area or same transformer station, three loop line roads are got in touch with mutually, form looped network, open loop operation, arrange contact at each looped network point afterwards often to make war, namely H1 place, first ring site in the diagram arranges first group of on-load switch (circuit breaker) K1, at the second looped network point H2 place, second group of on-load switch (circuit breaker) K2 is set, at the 3rd looped network point H3 place, the 3rd group of on-load switch (circuit breaker) K3 is set, the fault of any one section of circuit can be isolated, meet the service requirement of circuit " N-1 ", two of every loop line road normal battles of contact are finally guaranteed to be arranged in different ring main units, and the contact in circuit stage casing is often made war and is arranged on the position of line load Along ent, corresponding to substation bus bar A two contacts namely in Fig. 4 are normal makes war, namely first group of on-load switch (circuit breaker) K1 and second group on-load switch (circuit breaker) K2 need be arranged in different ring main units, two contacts corresponding to substation bus bar B are normal makes war, namely first group of on-load switch (circuit breaker) K1 and the 3rd group of on-load switch (circuit breaker) K3 need be arranged in different ring main units, two contacts corresponding to substation bus bar C are normal makes war, namely second group of on-load switch (circuit breaker) K2 and the 3rd group of on-load switch (circuit breaker) K3 need be arranged in different ring main units, and the position (position of the close line load Along ent of trying one's best in other words) being arranged on line load Along ent that the contact in circuit stage casing is often made war.
The schematic diagram of the cable system shown in Fig. 5 and Fig. 6 all set up according to the network-building method of midium voltage cable net involved in the present invention, does not repeat at this.
The network-building method mode of connection of midium voltage cable net involved in the present invention is simple, operational mode is flexible, reliability is high.The cable system set up according to the method is when normally running, each line load is by the bus tape splicing accessed separately, when breaking down, Fault Isolation is carried out by the on-load switch (circuit breaker) of both sides, fault point looped network point, fault point leading portion load by former access bus tape splicing, the bus tape splicing that fault point back-end load is accessed by group's circuit.At high reliability power supply area, the networking mode of midium voltage cable net cannot to the dual-ring network transition of standard time, the network-building method of midium voltage cable net involved in the present invention can improve the reliability of power supply, meets need for electricity.
Claims (2)
1. the network-building method of a midium voltage cable net, it is characterized in that: described network-building method comprises the following steps: step 1: fetch from the 10KV bus of the Liang Ge transformer station of same power supply area or the different 10KV buses of same transformer station as power supply, each loop line road is got in touch with mutually, form looped network, open loop operation; Step 2: contact is set at each looped network point and often makes war; Step 3: two of every loop line road normal battles of contact are arranged in different ring main units, and the contact in circuit stage casing is often made war be arranged on the position of line load Along ent.
2. the network-building method of midium voltage cable net according to claim 1, is characterized in that: it is two on-load switches or circuit breaker that described contact is often made war.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510692233.7A CN105244872A (en) | 2015-10-23 | 2015-10-23 | Medium voltage cable network networking method |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201510692233.7A CN105244872A (en) | 2015-10-23 | 2015-10-23 | Medium voltage cable network networking method |
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| CN105244872A true CN105244872A (en) | 2016-01-13 |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105470961A (en) * | 2016-01-18 | 2016-04-06 | 国网天津市电力公司 | Contact method in double-looped network nodes of 10-kV circuit |
| CN106410806A (en) * | 2016-06-24 | 2017-02-15 | 国家电网公司 | Three-circuit, two-segment and two-tie medium-voltage overhead main power distribution network and building method thereof |
| CN107979090A (en) * | 2017-12-08 | 2018-05-01 | 广州供电局有限公司 | Power distribution network three returns one group of topological structure |
| CN113193548A (en) * | 2021-03-30 | 2021-07-30 | 浙江大有实业有限公司带电作业分公司 | Limited interconnected double-ring type cable distribution network structure |
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| CN101888096A (en) * | 2010-07-19 | 2010-11-17 | 福建省电力试验研究院 | Triangle extension power-supply system |
| CN202121332U (en) * | 2011-04-15 | 2012-01-18 | 福建省电力有限公司电力科学研究院 | Chain-type expanded power supply system |
| US20140035372A1 (en) * | 2011-04-15 | 2014-02-06 | Tyco Electronics Uk Ltd. | Remote control and operation of lv distribution networks |
| CN103855712A (en) * | 2014-03-31 | 2014-06-11 | 国网上海市电力公司 | Power distribution net rack wiring structure |
| CN103872687A (en) * | 2014-03-31 | 2014-06-18 | 国网上海市电力公司 | Power distribution network rack wiring structure |
-
2015
- 2015-10-23 CN CN201510692233.7A patent/CN105244872A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101888096A (en) * | 2010-07-19 | 2010-11-17 | 福建省电力试验研究院 | Triangle extension power-supply system |
| CN202121332U (en) * | 2011-04-15 | 2012-01-18 | 福建省电力有限公司电力科学研究院 | Chain-type expanded power supply system |
| US20140035372A1 (en) * | 2011-04-15 | 2014-02-06 | Tyco Electronics Uk Ltd. | Remote control and operation of lv distribution networks |
| CN103855712A (en) * | 2014-03-31 | 2014-06-11 | 国网上海市电力公司 | Power distribution net rack wiring structure |
| CN103872687A (en) * | 2014-03-31 | 2014-06-18 | 国网上海市电力公司 | Power distribution network rack wiring structure |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105470961A (en) * | 2016-01-18 | 2016-04-06 | 国网天津市电力公司 | Contact method in double-looped network nodes of 10-kV circuit |
| CN106410806A (en) * | 2016-06-24 | 2017-02-15 | 国家电网公司 | Three-circuit, two-segment and two-tie medium-voltage overhead main power distribution network and building method thereof |
| CN106410806B (en) * | 2016-06-24 | 2019-10-18 | 国家电网公司 | Three circuit types two are segmented two pressure rack sky trunk power distribution networks and its construction method in the contact |
| CN107979090A (en) * | 2017-12-08 | 2018-05-01 | 广州供电局有限公司 | Power distribution network three returns one group of topological structure |
| CN113193548A (en) * | 2021-03-30 | 2021-07-30 | 浙江大有实业有限公司带电作业分公司 | Limited interconnected double-ring type cable distribution network structure |
| CN113193548B (en) * | 2021-03-30 | 2022-05-31 | 浙江大有实业有限公司带电作业分公司 | Limited interconnected double-ring type cable distribution network structure |
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Application publication date: 20160113 |