CN103208786A - Rapid protection system of electric power substation - Google Patents
Rapid protection system of electric power substation Download PDFInfo
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- CN103208786A CN103208786A CN2013101319698A CN201310131969A CN103208786A CN 103208786 A CN103208786 A CN 103208786A CN 2013101319698 A CN2013101319698 A CN 2013101319698A CN 201310131969 A CN201310131969 A CN 201310131969A CN 103208786 A CN103208786 A CN 103208786A
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Abstract
The invention discloses a rapid protection system of an electric power substation. The electric power substation comprises a main transformer, a back-up transformer, a bus, a bus coupling cabinet and a plurality of feeder line cabinets. The rapid protection system of the electric power substation is characterized by comprising a first current transformer, a high-voltage side switch, a low-voltage side switch, switch arc light probes, a first arc light relay extender, a second arc light relay extender, a bus coupling current transformer and a main control unit. The rapid protection system of the electric power substation has the advantage of being capable of performing power-off protection on the electric power substation according to matching of a detected arc light signal and detected current when any space among three independent space which are arranged inside the feeder line cabinets or the bus coupling cabinet is broken down due to the fact that a switch chamber, a bus chamber and a cable chamber which are arranged inside every feeder line cabinet and the bus coupling cabinet are provided with the switch arc light probes.
Description
Technical field
The application relates to ground relay protection of power system technical field, particularly relates to a kind of electric substation rapid protection system.
Background technology
The middle voltage bus bar fault, particularly under the situation that adopts feeder line cabinet power distribution equipment, electric arc may be lighted the device in the feeder line cabinet, causes fire, causes the large tracts of land controller switching equipment to burn, even destroys direct current system, causes more serious consequence.If installing is protection fast, protection action immediately in back takes place in fault, and with fault clearance, power supply just can recover rapidly before arc burning, and loss reduces greatly.According to the requirement of rapidity of relay protection, in order to guarantee the safe operation of transformer and bus connection switch equipment, press for the protection of configuration middle voltage bus bar.
And in electric power system, by existing protection rules, press bus protection during 110kV grade electric substation generally is unworthy of installing, this makes the feeder line cabinet of electric substation not have main protection.Facts have proved that the feeder line cabinet is as the nucleus equipment of power distribution network, the occurrence probability of short trouble is much larger than the short trouble of electric substation's miscellaneous equipment.So; in case the fault of being short-circuited is because be not equipped with main protection, main by transformer backup protection (composite voltage overcurrent protection) excision now; for with the cooperation of middle low-pressure system protection for feed line on selectivity, the transformer backup protection is often with very big time-delay.Make that like this short trouble life period in the feeder line cabinet is very long, usually do great damage.
Summary of the invention
In view of this, the embodiment of the present application provides a kind of electric substation rapid protection system, with realization electric substation is protected.
To achieve these goals, the technical scheme that provides of the embodiment of the present application is as follows:
A kind of electric substation rapid protection system, described electric substation comprises main transformer, spare transformer, bus, female connection cabinet and a plurality of feeder line cabinet, this system comprises:
First current transformer, high side switch, low-side switch, switch arc probe, the first arc light relay expander, the second arc light relay expander, female connection current transformer and main control unit, wherein:
Described female connection cabinet is arranged on the described bus, is provided with switch gear room, bus-bar room and circuit instrument transformer CT Room in described female connection cabinet, and is provided with bus connection switch in the switch gear room in described female connection cabinet;
Described bus connection switch is connected on the described bus, and described bus is divided into first section bus and second section bus, and described main transformer is connected with first section bus, and spare transformer is connected with second section bus;
In described female connection cabinet, be provided with arc probe in switch gear room, bus-bar room and the CT Room, in mother joins cabinet, be provided with mother and join the second arc light relay that the cabinet arc probe is connected, and the described second arc light relay is connected with bus connection switch;
Described first current transformer is positioned at described main transformer low-pressure side, is used for gathering the electric current of described main transformer low-pressure side;
Described high side switch is positioned at the high-pressure side of described main transformer, the low-pressure side of described low-side switch between bus and described main transformer; The switch arc probe of the arc light that occurs when in the switch gear room of described low-side switch, CT Room, being provided with for detection of it in fault;
Described female connection current transformer is connected with described bus, for detection of the bus current on the described bus;
A plurality of feeder line cabinets are connected with described bus respectively, be provided with switch gear room, bus-bar room and cable vault in each feeder line cabinet, in described feeder line cabinet, be provided with feeder switch in the switch gear room, and switch gear room, bus-bar room and cable vault are provided with a feeder line cabinet arc probe in each feeder line cabinet;
A first arc light relay that is connected with the arc probe of the interior switch gear room of this feeder line cabinet, cable vault all is set in each feeder line cabinet, and the described first arc light relay is connected with the feeder switch of setting in the described switch gear room;
The input of described main control unit is connected with described first current transformer, switch arc probe respectively, the output of described main control unit is connected with high side switch, low-side switch respectively, and output is connected with the described first arc light relay expander, the second arc light relay expander;
Described main control unit is used for controlling conducting or the disconnection of described high side switch, low-side switch, bus connection switch and a plurality of feeder line cabinet feeder switches respectively according to the testing result of the electric current of the described first current transformer collection and switch probe, feeder line cabinet arc probe.
Preferably, described main control unit comprises: current comparator, arc optical signal receiving circuit and first trip circuit, wherein,
Described arc optical signal receiving circuit is used for receiving the arc light detection signal of described switch arc probe, feeder line cabinet arc probe and female connection cabinet arc probe;
Described current comparator be used for will described first current transformer or the electric current that collects of female connection instrument transformer compare with given current value, judge whether that appearance is unusually;
Described first trip circuit is used for when the current anomaly that described first current transformer collects, if the load side of the cable vault of described feeder line cabinet or switch gear room's switch detects arc optical signal, then generate first trip signal and send to feeder switch, if the feeder line cabinet bus-bar room on described first section bus or the bus bar side of low-side switch detect arc optical signal, then generate second trip signal and send to low-side switch, if described female connection cabinet bus-bar room detects arc optical signal, then generate the 3rd trip signal and send to bus connection switch.
Preferably, described main control unit also comprises: second trip circuit, wherein,
Described second trip circuit is used for when the current anomaly that described first current transformer collects, if detect first trip signal, then generate the forth jump lock signal and send to described low-side switch and bus connection switch, if detect second trip signal, then generate the fifth jump lock signal and send to high side switch, if detect the 3rd trip signal, then generate the 6th trip signal and send to low-side switch.
Preferably, described main control unit also comprises: the failure signal generative circuit,
Described failure signal generative circuit is used for when the current anomaly that described first current transformer collects, and detect at least one in described first trip signal, second trip signal, the 3rd trip signal, the forth jump lock signal, the fifth jump lock signal or the 6th trip signal, then generate failure signal and failure signal is sent to upper level switch with the corresponding switch of trip signal.
Preferably, described main control unit also comprises:
Delay controller, described delay controller is used for according to the described the forth jump lock of Preset Time delayed delivery signal, the fifth jump lock signal, the 6th trip signal and failure signal.
By above technical scheme as seen; this electric substation's rapid protection system that the embodiment of the present application provides; owing to be provided with arc probe in switch gear room, bus-bar room and the cable vault in feeder line cabinet and female connection cabinet; so any one breaks down in three separate spaces in feeder line cabinet or the female connection cabinet, all can cooperate detected electric current that electric substation is carried out power-off protection according to detected arc optical signal.
Compared with prior art; this electric substation's rapid protection system; because each compartment in feeder line cabinet and the female connection cabinet all is separate; utilize the pinpoint characteristics of arc probe; press each compartment, each dead band of bus-bar system in the consideration; combine the characteristics design one that absorbs current protection, arc protection and overlap the logical scheme of protecting fast based on the middle pressure bus of arc light; finally form feeder line cabinet and female connection cabinet all standing protection system of precision, filled up middle configuration present situation of pressing bus main protection disappearance at present.In addition, this scheme need not existing electric substation is transformed, and namely under the prerequisite that does not change original first and second equipment, reaches the purpose of the greatest benefit balance point of protecting power supply and protection equipment.
Description of drawings
In order to be illustrated more clearly in the embodiment of the present application or technical scheme of the prior art, to do to introduce simply to the accompanying drawing of required use in embodiment or the description of the Prior Art below, apparently, the accompanying drawing that describes below only is some embodiment that put down in writing among the application, for those of ordinary skills, under the prerequisite of not paying creative work, can also obtain other accompanying drawing according to these accompanying drawings.
The structural representation of a kind of electric substation rapid protection system that Fig. 1 provides for the embodiment of the present application;
A kind of structural representation of the main control unit that Fig. 2 provides for the embodiment of the present application;
The another kind of structural representation of the main control unit that Fig. 3 provides for the embodiment of the present application;
Another structural representation of the main control unit that Fig. 4 provides for the embodiment of the present application;
Another structural representation of the main control unit that Fig. 5 provides for the embodiment of the present application.
Embodiment
In order to make those skilled in the art person understand technical scheme among the application better, below in conjunction with the accompanying drawing in the embodiment of the present application, technical scheme in the embodiment of the present application is clearly and completely described, obviously, described embodiment only is the application's part embodiment, rather than whole embodiment.Based on the embodiment among the application, those of ordinary skills are not making the every other embodiment that obtains under the creative work prerequisite, all should belong to the scope of the application's protection.
Execute example one:
In order to guarantee the safe operation of electric substation, electric substation can be provided with two cover high-tension lines usually, and in electric substation main transformer and spare transformer is set.With the power transformation of the dual transformer example of doing, this electric substation's rapid protection system that contrast the embodiment of the present application provides describes below.
The structural representation of a kind of electric substation rapid protection system that Fig. 1 provides for the embodiment of the present application.
As shown in Figure 2, electric substation comprises among the figure: main transformer CT1, spare transformer CT2, bus M, female connection cabinet (not shown) and a plurality of feeder line cabinet (not shown), wherein, bus M respectively with main transformer CT1, spare transformer CT2 is connected, (each feeder line cabinet comprises switch Q6 to a plurality of feeder line cabinets, Q7, among Q8 or the Q9 one) is connected with bus M respectively, be used for and export low tension to the user, female connection cabinet (being provided with bus connection switch Q10 in it) is positioned on the bus, be used for bus is divided into first section bus I and second section bus II, and described main transformer CT1 is connected with first section bus I, and spare transformer CT2 is connected with second section bus II.。
This electric substation's rapid protection system comprises: main control unit 1, the first current transformer L1, high side switch (not shown), low-side switch Q2, switch arc probe 4, the first arc light relay 2, the first arc light relay expander 7, female connection current transformer L4, bus connection switch Q10, female connection cabinet arc probe 6, the second arc light relay 8, the second arc light relay expander 9 and a plurality of feeder line cabinet arc probe 3.
The first current transformer L1 is connected on the low-pressure side of main transformer CT1, is used for gathering the electric current of main transformer CT1 low-pressure side.When break down in the feeder line cabinet in the electric substation or other position, changing will appear in the electric current that the first current transformer L1 collects, and is generally electric current and becomes and occur over-current phenomenon avoidance greatly.
High side switch is positioned at the high-pressure side of main transformer CT1, low-side switch Q2 is connected between bus M and the main transformer CT1, at the CT(Current of low-side switch Q2 Transformer, current transformer) is provided with switch arc probe 4 in chamber, the switch gear room, the arc light that the switch arc probe occurs during for detection of low-side switch Q2, the first current transformer L1 fault.When arc fault appears in low-side switch Q2, utilize switch arc probe 4 just can in time detect arc light and change, and then detected arc light situation is sent to main control unit 1 like this.
A plurality of feeder line cabinets are connected with bus M respectively, be provided with three separate spaces in existing each feeder line cabinet, be switch gear room, bus-bar room and cable vault, the dead band appears detecting in the feeder line cabinet, in the embodiment of the present application, and preferably, in each feeder line cabinet, be provided with switch gear room, bus-bar room and cable vault, wherein, be provided with feeder switch (Q6, Q7, Q8 or Q9) in the switch gear room, feeder switch is connected between bus M and the user's side.
Switch gear room, bus-bar room and cable vault are provided with a feeder line cabinet arc probe 3 in each feeder line cabinet, for detection of the arc fault that takes place in switch gear room, bus-bar room and the cable vault in each feeder line cabinet.And also be provided with the first arc light relay 2 in each feeder line cabinet, the first arc light relay 2 is connected with the feeder line cabinet arc probe 3 that is arranged on switch gear room in the feeder line cabinet, cable vault, the feeder line cabinet arc probe 3 that is arranged on bus-bar room in the feeder line cabinet then can be connected with main control unit 1 (as shown in Figure 1).And the first arc light relay 2 is connected with the feeder switch (Q6, Q7, Q8 or Q9) of setting in the switch gear room.
In addition, in other embodiment of the application, the feeder line cabinet arc probe 3 of bus-bar room can be by being connected with main control unit 1 behind the arc probe expander again in a plurality of feeder line cabinets.
The effect of the first arc light relay expander 7 is to gather feeder line cabinet arc probe 3(only to refer to feeder line cabinet arc probe feeder line cabinet switch gear room and cable vault in) detection signal and send to main control unit 1, the control signal that receives main control unit 1 is controlled the conducting of feeder switch (Q6, Q7, Q8 or Q9) or is closed.
Female connection cabinet is arranged on the bus M, be provided with switch gear room, bus-bar room and CT Room in female connection cabinet, and be provided with bus connection switch Q10 in the switch gear room in female connection cabinet, bus connection switch Q10 is connected on the bus M, with two sections of bus M, female connection current transformer L4 is positioned on first section bus I, for detection of the electric current on the bus.
Join switch gear room and the indoor mother's connection cabinet arc probe 6 that is provided with of CT Room in the cabinet mother, in mother joins cabinet, be provided with mother and join the second arc light relay 9 that cabinet arc probe 6 is connected, and the second arc light relay 9 is connected with bus connection switch Q10, and the second arc light relay 8 is used for conducting or the disconnection of control bus connection switch Q10.
The second arc light relay expander, 9 one ends are connected with main control unit 1, the other end is connected with the second arc light relay 8, the second arc light relay expander 9 is used for gathering the detection signal of female connection cabinet arc probe 6 and sending to main control unit 1, receive main control unit 1 control signal bus connection switch Q10 conducting or close.
In the application implements; main control unit 1 is as the computing center of this protection system; the input of main control unit 1 is connected with the first current transformer L1, switch arc probe 4 respectively; be used for to receive the current signal that the first current transformer L1 gathers, and receiving key arc probe 4, feeder line cabinet arc probe 3 detected arc optical signals.The output of main control unit 1 is connected with high side switch, low-side switch respectively, output is connected with the first arc light relay 2 in each feeder line cabinet by the first arc light relay expander 7, and is connected with the second arc light relay 8 in female connection cabinet by the second arc light relay expander 9.
The purpose of main control unit is to control conducting or the disconnection of high side switch, low-side switch Q2, bus connection switch Q10 and a plurality of feeder switches respectively according to the testing result of the electric current of the first current transformer L1, the collection of female connection current transformer and switch probe 4, feeder line cabinet arc probe 3.
Figure 2 shows that a kind of structural representation of the main control unit that the embodiment of the present application provides.
Among the figure, main control unit comprises: current comparator 11, arc optical signal receiving circuit 12 and first trip circuit 13, wherein, first trip circuit is connected with current comparator 11, arc optical signal receiving circuit 12 respectively.
Arc optical signal receiving circuit 12 is used for receiving the arc light detection signal of described switch arc probe 4, feeder line cabinet arc probe 3 and female connection cabinet arc probe 6.
Be specially:
1, the load side of the cable vault of current anomaly and feeder line cabinet or switch gear room's switch detects arc optical signal, then generates first trip signal and sends to feeder switch;
2, the feeder line cabinet bus-bar room on current anomaly and the first section bus or the bus bar side of low-side switch detect arc optical signal, then generate second trip signal and send to low-side switch;
3, current anomaly and female connection cabinet bus-bar room or feeder line cabinet bus-bar room detect arc optical signal, then generate the 3rd trip signal and send to bus connection switch.
Specifically can see table the content of the sequence number 1-3 in 1.
In addition, in the embodiment of the present application, if when considering system's single phase transformer power supply, be example with standby transformer-supplied, this moment, bus connection switch Q10 was in conducting state, when if fault occurs between bus connection switch Q10 and the female connection current transformer L4, this fault can be described as female connection dead band fault, female connection current transformer L4 may gather less than the fault current on the bus, so this moment, the electric current of the second arc light relay 8 can adopt source current, be associated to 2 electric power incoming lines of step down side, i.e. the collection electric current of the first current transformer L1.Mother in the employing main control units 1 such as all the other compartments on the bus such as busbar chamber joins protection logic (Starting mode adds the arc optical signal of all feeder line cabinet arc probe for the electric current of female connection current transformer L4) tripping operation.
Join in the error protection of dead band mother; the protection logic has two kinds of operational modes, female connection paired running pattern and female connection fanout operation pattern, and two kinds of patterns are judged by hard pressing plate by main control unit 1; hard pressing plate can close the position by bus connection switch and insert, and makes things convenient for device to judge automatically.According to the branch of bus connection switch, close state, the dead band protection of female connection cabinet divides following two kinds of operational modes:
A) when the bus paired running, if break down in that bus connection switch is indoor, have at least 1 electric power incoming line electric current criterion to satisfy, then directly jump bus connection switch by bus connection switch arc light relay, send failure system to main control unit at switch trip while bus connection switch arc light relay, monitoring fault current as if main control unit after the bus connection switch tripping still exists, behind 70～150ms (can adjust), jump corresponding step down side switch according to the logic that main control unit is adjusted, this configuration logic can guarantee that any particular location of the indoor fault of bus connection switch breaks down, all can selective excision fault.
B) when the bus fanout operation; (hard pressing plate) can directly gather the state of the bus connection switch arc probe of installing the bus connection switch chamber after the main control unit identification running status by bus connection switch arc light relay; arc light collection point as the transformer low voltage protection module; and be not subjected to the locking of bus connection switch arc light relay, protect quick acting when cabinet is interior, and arc fault takes place as if female the connection when realizing fanout operation.
By above technical scheme as seen; this electric substation's rapid protection system that the embodiment of the present application provides; owing to be provided with arc probe in switch gear room, bus-bar room and the cable vault in feeder line cabinet and female connection cabinet; so any one breaks down in three separate spaces in feeder line cabinet or the female connection cabinet, all can cooperate detected electric current that electric substation is carried out power-off protection according to detected arc optical signal.
Compared with prior art; this electric substation's rapid protection system; because each compartment in feeder line cabinet and the female connection cabinet all is separate; utilize the pinpoint characteristics of arc probe; press each compartment, each dead band of bus-bar system in the consideration; combine the characteristics design one that absorbs current protection, arc protection and overlap the logical scheme of protecting fast based on the middle pressure bus of arc light; finally form feeder line cabinet and female connection cabinet all standing protection system of precision, filled up middle configuration present situation of pressing bus main protection disappearance at present.In addition, this scheme need not existing electric substation is transformed, and namely under the prerequisite that does not change original first and second equipment, reaches the purpose of the greatest benefit balance point of protecting power supply and protection equipment.
Embodiment two:
Figure 3 shows that the another kind of structural representation of the main control unit that the embodiment of the present application provides.
As shown in Figure 3, this main control unit can also comprise: second trip circuit 14, wherein: second trip circuit 14 is connected with current comparator 11, first trip circuit 13 respectively.
Second trip circuit is used for disconnecting according to the corresponding switch of the trip signal of the output of the comparative result of current comparator 11 and first trip circuit 13.
Be specially:
4, current anomaly and detect first trip signal then generates the forth jump lock signal and sends to described low-side switch and bus connection switch;
5, current anomaly and detect second trip signal then generates the fifth jump lock signal and sends to high side switch;
6, current anomaly and detect the 3rd trip signal then generates the 6th trip signal and sends to low-side switch.
Specifically can see table the content of the sequence number 4-6 in 1.
Figure 4 shows that another structural representation of the main control unit that the embodiment of the present application provides.
As shown in Figure 4, this main control unit can also comprise: failure signal generative circuit 15.
Failure signal generative circuit 16 is used for when the current anomaly that described first current transformer collects, and detect at least one in described first trip signal, second trip signal, the 3rd trip signal, the forth jump lock signal, the fifth jump lock signal or the 6th trip signal, then generate failure signal and failure signal is sent to upper level switch with the corresponding switch of trip signal.
In order to realize better control, as shown in Figure 5, described main control unit 1 also comprises: delay controller 16.
Described delay controller 16 is used for according to the described the forth jump lock of Preset Time delayed delivery signal, the fifth jump lock signal, the 6th trip signal and failure signal.
In addition, in the embodiment of the present application, the first malfunctioning switch Q1 or the second malfunctioning switch Q3 can not be concrete machinery or motor switches, and can be the upper strata electric power system of main transformer or spare transformer.
The protection scheme of this system that the embodiment of the present application is provided with form describes below, referring to table 1:
Table 1:
By above technical scheme as seen; this a kind of electric substation rapid protection system that the embodiment of the present application provides; owing to be provided with arc probe in switch gear room, bus-bar room and the cable vault in feeder line cabinet and female connection cabinet; so any one breaks down in three separate spaces in feeder line cabinet or the female connection cabinet, all can cooperate detected electric current that electric substation is carried out power-off protection according to detected arc optical signal.
Compared with prior art; this a kind of electric substation rapid protection system; because each compartment in feeder line cabinet and the female connection cabinet all is separate; utilize the pinpoint characteristics of arc probe; press each compartment, each dead band of bus-bar system in the consideration; combine the characteristics design one that absorbs current protection, arc protection and overlap the logical scheme of protecting fast based on the middle pressure bus of arc light; finally form feeder line cabinet and female connection cabinet all standing protection system of precision, filled up middle configuration present situation of pressing bus main protection disappearance at present.In addition, this scheme need not existing electric substation is transformed, and namely under the prerequisite that does not change original first and second equipment, reaches the purpose of the greatest benefit balance point of protecting power supply and protection equipment.
More than a kind of electric substation rapid protection system that the application is provided be described in detail, used specific case herein the application's principle and execution mode are set forth, the explanation of above embodiment just is used for helping to understand the application's method and core concept thereof; Simultaneously, for one of ordinary skill in the art, according to the application's thought, the part that all can change in specific embodiments and applications, in sum, this description should not be construed as the restriction to the application.
Each embodiment adopts the mode of going forward one by one to describe in this specification, and what each embodiment stressed is and the difference of other embodiment that identical similar part is mutually referring to getting final product between each embodiment.
Need to prove, in this article, such as " greater than " or " surpassing " or " being higher than " or " less than " or " being lower than " etc. relationship description, all can be understood as " greater than and be not equal to " or " less than and be not equal to ", also can be understood as " more than or equal to " or " smaller or equal to ", and not necessarily require or hint a kind of situation restriction or intrinsic that is necessary for.
In addition, in this article, relational terms such as " first " and " second " etc. only is used for an entity or operation are made a distinction with another entity or operation, and not necessarily requires or hint and have the relation of any this reality or in proper order between these entities or the operation.And, in this article, term " comprises ", " comprising " or its any other variant are intended to contain comprising of nonexcludability, thereby make and comprise that process, method, article or the equipment of a series of key elements not only comprise those key elements, but also comprise other key elements of clearly not listing, or also be included as the intrinsic key element of this process, method, article or equipment.Do not having under the situation of more restrictions, the key element that is limited by statement " comprising ... ", and be not precluded within process, method, article or the equipment that comprises described key element and also have other identical element.
Need to prove, the above only is a part of preferred embodiment of present techniques scheme, make those skilled in the art can fully understand or realize the application, rather than whole embodiment, defined General Principle can realize under the situation of the spirit or scope that do not break away from the application in other embodiments herein.Therefore; based on above embodiment; for those skilled in the art; do not break away from the application's principle, do not making under the creative work prerequisite, can also make multiple apparent modification and retouching; the every other embodiment that obtains by these modifications and retouching; can be applied to the present techniques scheme, these do not influence the application's realization, all should belong to the application's protection range.Therefore, the application will can not be restricted to these embodiment shown in this article, but will meet the wideest scope consistent with principle disclosed herein and features of novelty.
Claims (5)
1. electric substation's rapid protection system, described electric substation comprises main transformer, spare transformer, bus, female connection cabinet and a plurality of feeder line cabinet, it is characterized in that this system comprises:
First current transformer, high side switch, low-side switch, switch arc probe, the first arc light relay expander, the second arc light relay expander, female connection current transformer and main control unit, wherein:
Described female connection cabinet is arranged on the described bus, is provided with switch gear room, bus-bar room and circuit instrument transformer CT Room in described female connection cabinet, and is provided with bus connection switch in the switch gear room in described female connection cabinet;
Described bus connection switch is connected on the described bus, and described bus is divided into first section bus and second section bus, and described main transformer is connected with first section bus, and spare transformer is connected with second section bus;
In described female connection cabinet, be provided with female connection cabinet arc probe in switch gear room, bus-bar room and the CT Room, in mother joins cabinet, be provided with mother and join the second arc light relay that the cabinet arc probe is connected, and the described second arc light relay is connected with bus connection switch;
Described first current transformer is positioned at described main transformer low-pressure side, is used for gathering the electric current of described main transformer low-pressure side;
Described high side switch is positioned at the high-pressure side of described main transformer, the low-pressure side of described low-side switch between bus and described main transformer; The switch arc probe of the arc light that occurs when in the switch gear room of described low-side switch, CT Room, being provided with for detection of it in fault;
Described female connection current transformer is connected with described bus, for detection of the bus current on the described bus;
A plurality of feeder line cabinets are connected with described bus respectively, be provided with switch gear room, bus-bar room and cable vault in each feeder line cabinet, in described feeder line cabinet, be provided with feeder switch in the switch gear room, and switch gear room, bus-bar room and cable vault are provided with a feeder line cabinet arc probe in each feeder line cabinet;
A first arc light relay that is connected with the arc probe of the interior switch gear room of this feeder line cabinet, cable vault all is set in each feeder line cabinet, and the described first arc light relay is connected with the feeder switch of setting in the described switch gear room;
The input of described main control unit is connected with described first current transformer, switch arc probe respectively, the output of described main control unit is connected with high side switch, low-side switch respectively, and output is connected with the described first arc light relay expander, the second arc light relay expander;
Described main control unit is used for controlling conducting or the disconnection of described high side switch, low-side switch, bus connection switch and a plurality of feeder line cabinet feeder switches respectively according to the testing result of the electric current of the described first current transformer collection and switch probe, feeder line cabinet arc probe.
2. system according to claim 1 is characterized in that, described main control unit comprises: current comparator, arc optical signal receiving circuit and first trip circuit, wherein,
Described arc optical signal receiving circuit is used for receiving the arc light detection signal of described switch arc probe, feeder line cabinet arc probe and female connection cabinet arc probe;
Described current comparator be used for will described first current transformer or the electric current that collects of female connection instrument transformer compare with given current value, judge whether that appearance is unusually;
Described first trip circuit is used for when the current anomaly that described first current transformer collects, if the load side of the cable vault of described feeder line cabinet or switch gear room's switch detects arc optical signal, then generate first trip signal and send to feeder switch, if the feeder line cabinet bus-bar room on described first section bus or the bus bar side of low-side switch detect arc optical signal, then generate second trip signal and send to low-side switch, if described female connection cabinet bus-bar room or feeder line cabinet bus-bar room detect arc optical signal, then generate the 3rd trip signal and send to bus connection switch.
3. system according to claim 2 is characterized in that, described main control unit also comprises: second trip circuit, wherein,
Described second trip circuit is used for when the current anomaly that described first current transformer collects, if detect first trip signal, then generate the forth jump lock signal and send to described low-side switch and bus connection switch, if detect second trip signal, then generate the fifth jump lock signal and send to high side switch, if detect the 3rd trip signal, then generate the 6th trip signal and send to low-side switch.
4. system according to claim 3 is characterized in that, described main control unit also comprises: the failure signal generative circuit,
Described failure signal generative circuit is used for when the current anomaly that described first current transformer collects, and detect at least one in described first trip signal, second trip signal, the 3rd trip signal, the forth jump lock signal, the fifth jump lock signal or the 6th trip signal, then generate failure signal and failure signal is sent to upper level switch with the corresponding switch of trip signal.
5. system according to claim 4 is characterized in that, described main control unit also comprises:
Delay controller, described delay controller is used for according to the described the forth jump lock of Preset Time delayed delivery signal, the fifth jump lock signal, the 6th trip signal and failure signal.
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| CN201310131969.8A CN103208786B (en) | 2013-04-16 | 2013-04-16 | Rapid protection system of electric power substation |
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| CN104377582A (en) * | 2014-11-25 | 2015-02-25 | 辽宁电能发展股份有限公司 | Box-type substation |
| CN104407244A (en) * | 2014-11-21 | 2015-03-11 | 国家电网公司 | Main transformer tripping matrix testing system |
| CN106169737A (en) * | 2016-08-29 | 2016-11-30 | 国网江苏省电力公司镇江供电公司 | Big current start 500kV transformer station 35kV simple bus protection relay protecting method |
| CN106410739A (en) * | 2016-11-02 | 2017-02-15 | 云南电力试验研究院(集团)有限公司 | Arc protection device and fault diagnosis method thereof |
| CN110311357A (en) * | 2019-06-14 | 2019-10-08 | 国网河南省电力公司灵宝市供电公司 | A kind of Backup Protection Device for Transformer accelerated using nearly bus electric arc |
| CN110518553A (en) * | 2019-08-21 | 2019-11-29 | 南京瑞德力电气科技有限公司 | A kind of bus feeder line arc light protecting system |
| CN110752588A (en) * | 2019-11-07 | 2020-02-04 | 国网浙江淳安县供电有限公司 | Protection device based on electric arc and light detection |
| CN112736868A (en) * | 2020-12-23 | 2021-04-30 | 国网浙江省电力有限公司金华供电公司 | 5G intelligent distributed distribution network protection system |
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| CN110311357A (en) * | 2019-06-14 | 2019-10-08 | 国网河南省电力公司灵宝市供电公司 | A kind of Backup Protection Device for Transformer accelerated using nearly bus electric arc |
| CN110518553A (en) * | 2019-08-21 | 2019-11-29 | 南京瑞德力电气科技有限公司 | A kind of bus feeder line arc light protecting system |
| CN110752588A (en) * | 2019-11-07 | 2020-02-04 | 国网浙江淳安县供电有限公司 | Protection device based on electric arc and light detection |
| CN112736868A (en) * | 2020-12-23 | 2021-04-30 | 国网浙江省电力有限公司金华供电公司 | 5G intelligent distributed distribution network protection system |
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