CN203261015U - One-hundred-percent rapid protection system for internal fault of switch cabinet - Google Patents
One-hundred-percent rapid protection system for internal fault of switch cabinet Download PDFInfo
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- CN203261015U CN203261015U CN 201320262362 CN201320262362U CN203261015U CN 203261015 U CN203261015 U CN 203261015U CN 201320262362 CN201320262362 CN 201320262362 CN 201320262362 U CN201320262362 U CN 201320262362U CN 203261015 U CN203261015 U CN 203261015U
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Abstract
Provided in the utility model is a one-hundred-percent rapid protection system for an internal fault of a switch cabinet. The one-hundred-percent rapid protection system is composed of a main control unit, an arc relay, a current unit and arc probes. The arc probes include bus protection probes and feeder line protection probes; the bus protection probes include a set of bus protection probes that are respectively installed in bus chambers of a step-down switch cabinet and a feeder centrally installed switchgear as well as bus chambers of a PT cabinet, an isolation cabinet, an incoming cabinet, and a bus coupling cabinet; and the bus protection probes are connected to the main control unit directly or by arc units. The feeder line protection probes include ones respectively installed in a cable chamber and a switch chamber of the feeder centrally installed switchgear and ones respectively installed in a cable chamber and a switch chamber of the bus coupling cabinet; and the feeder line protection probes are connected to the main control unit by the arc relay. With utilization of the one-hundred-percent rapid protection system, one-hundred-percent dead zone-free rapid protection for faults of all zones in the switch cabinet can be realized, thereby avoiding expansion of a power outage range.
Description
Technical field:
The utility model relates to a kind of internal faults of switch cabinet 100% rapid protection system, belongs to fault and detects and the resist technology field.
Background technology:
Power system transformer substation middle-low voltage switch cabinet bus-bar room, switch gear room and the CT of cable vault install above part and have fast main protection defective of nothing; when breaking down, inside switch cabinet can only rely on backup protection excision fault; excision is long fault time; may cause switch cubicle blast, involve that direct current system, main transformer are subjected to close-in fault to impact the serious consequences such as damage in the station.
In traditional bus protection, the reserve overcurrent protection is long operate time, can not play effective protective effect; Bus differential protection scope is subjected to the restriction of CT installation site, and wiring is complicated, and CT requires high.
Arc protection is as a kind of novel bus protection, and its principle is simple, reliable in action rapid, adapt to various operational modes.But the electric arc protection of at present part transformer station employing only can be realized the quick main protection of switch cabinet bus chamber; consider that for switch gear room, cable vault CT installs following part and can realize fast protection by feeding out cell protection; consider generally not dispose the arc light monitoring point based on selectivity; but switch gear room, cable vault be the easy happening part of fault often, has protection configuration dead band.
The utility model content:
The purpose of this utility model is that the problem for above-mentioned existence provides a kind of internal faults of switch cabinet comprehensive rapid protecting device; this system can not only realize traditional middle voltage bus bar protection; and the selectivity fast trip of the diverse location such as cable vault, switch gear room, bus-bar room that can realize the feeder line middle-placed switch cabinet when breaking down; realize that 100% of internal faults of switch cabinet protects fast without the dead band, avoid the extension of power failure range.
Above-mentioned purpose realizes by following technical scheme:
Internal faults of switch cabinet 100% rapid protection system; comprise main control unit; the arc light relay; current unit and arc probe; described arc probe is divided into bus protection probe and protection for feed line probe; described bus protection probe comprises and is installed in respectively the step-down switch cubicle; the bus-bar room of feeder line middle-placed switch cabinet; the PT cabinet; the isolation cabinet; incoming line cabinet; one group of bus protection probe of the bus-bar room of mother cabinet; described protection for feed line probe comprises the protection for feed line probe of the cable vault that is installed in respectively the feeder line middle-placed switch cabinet and switch gear room and is installed in respectively the protection for feed line probe of cable vault and the switch gear room of mother cabinet that described protection for feed line probe connects described main control unit by the arc light relay.
Described internal faults of switch cabinet 100% rapid protection system, described bus protection probe directly or by arc light unit accesses described main control unit.
Beneficial effect:
Produce the electric arc characteristics when the utility model breaks down according to inside switch cabinet, power supply point current break criterion consists of arc light protecting system during in conjunction with fault.Adopt the subregion to detect the arc optical signal technology, the extension of power failure range is avoided in the selectivity tripping operation when the arc light relay by the feeder unit configuration and the cooperation of arc protection main control unit realize diverse location generation arc fault.
Description of drawings:
Fig. 1 is probe scheme of installation of the present utility model.
Fig. 2 is system layout of the present utility model.
Embodiment:
In order to elaborate technology contents of the present utility model, especially exemplified by following examples.Especially, the system configuration of following examples only is based on a kind of way of realization of the utility model thought, as long as in fact the version of any one switch cubicle can meet method of the present utility model, equally can realize the utility model.
Embodiment 1:
As shown in Figure 1: internal faults of switch cabinet 100% rapid protection system of the present utility model; comprise main control unit; the arc light relay; current unit and arc probe; described arc probe is divided into bus protection probe and protection for feed line probe; described bus protection probe comprises and is installed in respectively the step-down switch cubicle; the bus-bar room of feeder line middle-placed switch cabinet; the PT cabinet; the isolation cabinet; incoming line cabinet; one group of bus protection probe of the bus-bar room of mother cabinet; described protection for feed line probe comprises the protection for feed line probe of the cable vault that is installed in respectively the feeder line middle-placed switch cabinet and switch gear room and is installed in respectively the protection for feed line probe of cable vault and the switch gear room of mother cabinet that described protection for feed line probe connects described main control unit by the arc light relay.
Described internal faults of switch cabinet 100% rapid protection system, described bus protection probe directly or by arc light unit accesses described main control unit.
Utilize above-mentioned protection system to carry out the fast method of protection of internal faults of switch cabinet 100%; the method comprises: arc optical signal is detected in the subregion; then adopt the selective protection method, described selective protection method comprises protection for feed line method, bus bar protecting method, mother guard method and incoming relay-protection method.
Described internal faults of switch cabinet 100% is the method for protection fast, described subregion is detected arc optical signal and referred to inside switch cabinet is divided into bus protection zone and protection for feed line zone: the bus-bar room of the bus-bar room of step-down switch cubicle, feeder line middle-placed switch cabinet, PT cabinet, isolation cabinet, incoming line cabinet, mother cabinet belongs to the bus protection zone, bus protection probe is installed respectively, directly or by the described main control unit of arc light unit; The cable vault of the cable vault of feeder line middle-placed switch cabinet and switch gear room, mother cabinet and switch gear room belong to the protection for feed line zone, and the protection for feed line probe is installed respectively, access described arc light relay.
Described internal faults of switch cabinet 100% is the method for protection fast, and described protection for feed line method refers at each feeder line middle-placed switch cabinet an arc light relay is installed, and this arc light relay gathers the arc probe signal of this cabinet cable vault, switch indoor location; Inlet wire current and mother electric current on the bus of related this feeder line of this arc light relay place receive the correlated current action message from main control unit; When arc probe action and the action of associated electric current, arc light actuating of relay outlet, this feeder switch of tripping sends actuating signal to main control unit simultaneously; If main control unit detects the arc light actuating of relay of feeder cabinet, and at the time-delay internal fault electric current sustainable existence of adjusting, then main control unit action outlet, tripping fault current place service entrance switch or bus connection switch.
Described internal faults of switch cabinet 100% is the method for protection fast, and described bus bar protecting method refers to be associated in the arc probe that bus-bar room is installed electric power incoming line electric current and the bus connection switch electric current of this section bus direct correlation; When the arc probe action of bus-bar room, and associated electric power incoming line electric current or the action of bus connection switch electric current, main control unit action outlet, electric power incoming line switch or bus connection switch that tripping is associated.
Described internal faults of switch cabinet 100% is the method for protection fast, and described mother guard method is arc light relay of installing in the mother cabinet, gathers the arc probe signal of this cabinet switch gear room, cable indoor location; The related mother of this arc light relay both sides electric power incoming line electric current receives the correlated current action message from main control unit; When the action of arc light relay arc probe and the action of associated inlet wire current, arc light actuating of relay outlet, the tripping bus connection switch, and give main control unit sending action signal; If main control unit detects the arc light actuating of relay of mother cabinet, and fault current still exists after the time-delay of adjusting, then main control unit action outlet, tripping fault current place service entrance switch; The arc probe of installing on bus connection switch two side bus is associated to the bus connection switch electric current, when the action of dependence arc light probe and the action of bus connection switch electric current, and main control unit action outlet, tripping bus connection switch.
Described internal faults of switch cabinet 100% is the method for protection fast, and described incoming relay-protection method is to be associated to this electric power incoming line electric current in the arc probe that incoming line cabinet is installed; When arc probe action and electric current action, main control unit action outlet is jumped the electric power incoming line switch, and is started corresponding failure protection; If after the malfunctioning startup, still there are then failure protection action outlet, the corresponding step down side switch of tripping at the time-delay internal fault electric current of adjusting.
Fig. 2 is typical arc light protecting system allocation plan.As shown in Figure 2, because left-right symmetric, below be described further as an example of mother I example.
Arc optical signal is detected in the subregion, and as shown in Figure 2, probe 1, probe 2 belong to the bus protection category, the access main control unit.Probe 3, probe 4 belong to the protection for feed line category, respectively corresponding feeder line arc light relay ArcRelay2 and the ArcRelay1 of access.
Selectivity tripping operation when the arc light relay by feeder unit configuration and the cooperation of arc protection main control unit realize diverse location generation arc fault.Suppose the female power supply of I, the mother co-bit.When each point broke down in the system, this arc light protecting system action behavior was as follows:
1. feeder switch below F1 fault, probe 4 actions, the female inlet wire current action of I, arc light relay ArcRelay1 moves outlet, tripping switch BRK4, fault is cut;
2. feeder switch top F2 fault, probe 4 actions, the female inlet wire current action of I, arc light relay ArcRelay1 moves outlet, tripping switch BRK4, fault still exists.Main control unit is received arc light relay ArcRelay1 actuating signal, judges the female inlet wire current perseveration of I, time-delay tripping switch BRK2, and fault is cut;
3. F3 fault on the bus, probe 2 actions, the female inlet wire current action of I, main control unit tripping switch BRK2, fault is cut;
4. bus connection switch is away from mains side F4 fault, probe 3 actions, and the female inlet wire current action of I, arc light relay ArcRelay2 moves outlet, tripping switch BRK3, fault is cut;
5. the nearly mains side F5 of bus connection switch fault, probe 3 actions, the female inlet wire current action of I, arc light relay ArcRelay2 moves outlet, tripping switch BRK3, fault still exists; Main control unit is received the actuating signal of arc light relay ArcRelay2, judges the female inlet wire current perseveration of I, main control unit deferred action outlet, and tripping switch BRK2, fault is cut;
6. incoming line cabinet switch below F6 fault, probe 1 action, the female inlet wire current action of I, main control unit action outlet, tripping switch BRK2, fault is cut;
7. incoming line cabinet switch top F7 fault, probe 1 action, the female inlet wire current action of I, main control unit action outlet, tripping switch BRK2, fault still exists; Failure protection is judged the female inlet wire current perseveration of I, main control unit failure protection deferred action outlet, and tripping switch BRK1, fault is cut;
8. F8 fault on the bus, probe 5 actions, the action of bus connection switch electric current, main control unit action outlet, tripping switch BRK3, fault is cut;
The disclosed technological means of the utility model scheme is not limited only to the disclosed technological means of above-mentioned technological means, also comprises by above technical characterictic being equal to the technical scheme that replacement forms.Unaccomplished matter of the present utility model belongs to those skilled in the art's common practise.
Claims (2)
1. internal faults of switch cabinet 100% rapid protection system; it is characterized in that: comprise main control unit; the arc light relay; current unit and arc probe; described arc probe is divided into bus protection probe and protection for feed line probe; described bus protection probe comprises and is installed in respectively the step-down switch cubicle; the bus-bar room of feeder line middle-placed switch cabinet; the PT cabinet; the isolation cabinet; incoming line cabinet; one group of bus protection probe of the bus-bar room of mother cabinet; described protection for feed line probe comprises the protection for feed line probe of the cable vault that is installed in respectively the feeder line middle-placed switch cabinet and switch gear room and is installed in respectively the protection for feed line probe of cable vault and the switch gear room of mother cabinet that described protection for feed line probe connects described main control unit by the arc light relay.
2. internal faults of switch cabinet 100% rapid protection system according to claim 1 is characterized in that: described bus protection probe directly or by arc light unit accesses described main control unit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320262362 CN203261015U (en) | 2013-05-15 | 2013-05-15 | One-hundred-percent rapid protection system for internal fault of switch cabinet |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320262362 CN203261015U (en) | 2013-05-15 | 2013-05-15 | One-hundred-percent rapid protection system for internal fault of switch cabinet |
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| Publication Number | Publication Date |
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| CN203261015U true CN203261015U (en) | 2013-10-30 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN 201320262362 Expired - Lifetime CN203261015U (en) | 2013-05-15 | 2013-05-15 | One-hundred-percent rapid protection system for internal fault of switch cabinet |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103248017A (en) * | 2013-05-15 | 2013-08-14 | 南京弘毅电气自动化有限公司 | 100-percent fast protection system and method for internal fault of switch cabinet |
| CN105703234A (en) * | 2015-11-04 | 2016-06-22 | 连云港市港圣开关制造有限公司 | Switch cabinet arc light protection system |
| CN112881905A (en) * | 2021-01-21 | 2021-06-01 | 浙江高正电气有限公司 | Centrally-installed switchgear with self-diagnosis function and intelligent diagnosis method |
-
2013
- 2013-05-15 CN CN 201320262362 patent/CN203261015U/en not_active Expired - Lifetime
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103248017A (en) * | 2013-05-15 | 2013-08-14 | 南京弘毅电气自动化有限公司 | 100-percent fast protection system and method for internal fault of switch cabinet |
| CN103248017B (en) * | 2013-05-15 | 2015-12-23 | 南京弘毅电气自动化有限公司 | Internal faults of switch cabinet 100% rapid protection system and guard method |
| CN105703234A (en) * | 2015-11-04 | 2016-06-22 | 连云港市港圣开关制造有限公司 | Switch cabinet arc light protection system |
| CN112881905A (en) * | 2021-01-21 | 2021-06-01 | 浙江高正电气有限公司 | Centrally-installed switchgear with self-diagnosis function and intelligent diagnosis method |
| CN112881905B (en) * | 2021-01-21 | 2022-09-13 | 浙江高正电气有限公司 | Centrally-installed switchgear with self-diagnosis function and intelligent diagnosis method |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20131030 |