CN104037934B - The apparatus and method that a kind of Substation Station using electricity system prepared auto restart is emergent - Google Patents
The apparatus and method that a kind of Substation Station using electricity system prepared auto restart is emergent Download PDFInfo
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- CN104037934B CN104037934B CN201410270736.0A CN201410270736A CN104037934B CN 104037934 B CN104037934 B CN 104037934B CN 201410270736 A CN201410270736 A CN 201410270736A CN 104037934 B CN104037934 B CN 104037934B
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Abstract
The invention provides the device that a kind of Substation Station using electricity system prepared auto restart is emergent, comprise sampling unit, protected location, switching transistor and logic control element; This side switch in sampling unit connects this side electric power incoming line and bus, and bus connection switch connects this to side bus, this offside of voltage sample model calling electric power incoming line, this side bus of current sample model calling; Protected location connects sampling unit, for the current value size according to this side bus, determines mode of operation and to switching transistor transmission level signal; Switching transistor connects above-mentioned three unit respectively, for realizing being turned on or off according to the height of level signal; When logic control element is used for switching transistor conducting, according to the three-phase voltage value size of this offside electric power incoming line, determine to enable this side electric power incoming line or power to this side bus to side bus.Implement the present invention, structure is simple, dismounting is quick, avoids the risk of the long-time decompression of this side bus, saves a large amount of financial resources and time.
Description
Technical field
The present invention relates to power system transformer substation station power use system technical field, particularly relate to the apparatus and method that a kind of Substation Station using electricity system prepared auto restart is emergent.
Background technology
As shown in Figure 1, Substation Station using electricity system provides reliable and stable 380V AC power for AC load in transformer station, its common configuration is I section bus a' and II section bus b' fanout operation, I section bus a' and II section bus b' AC power draw the low-pressure side from two station local coordinate frame for subsequent use each other respectively, namely I section bus a' is that the #1 of #1 station power supply P1 inlet wire of standing is powered by 10KV AC power by uprise switch S T1 and other potential device transformation of station local coordinate frame, II section bus b' is that the #2 of #2 station power supply P2 inlet wire of standing is powered by 10KV AC power by uprise switch S T2 and other potential device transformation of station local coordinate frame.When I section bus a' lose #1 station power supply P1 inlet wire power time, namely #1 station service entrance switch 1QF lost efficacy and disconnected, then exchange the inlet wire backup auto-activating device N1 shielded in M1 by the bus be arranged in #1 station and pass through closed bus connection switch 3QF, switch on II section bus b' that #2 station power supply P2 inlet wire powers, avoid I section bus a' decompression; When II section bus b' lose #2 station power supply P2 inlet wire power time, namely #2 station service entrance switch 2QF lost efficacy and disconnected, then exchange the inlet wire backup auto-activating device N2 shielded in M2 by the bus be arranged in #2 station and pass through closed bus connection switch 3QF, switch to the I section bus a' that #1 station power supply P1 inlet wire is powered, avoid II section bus b' decompression.
At present, Substation Station using electricity system backup auto-activating device is used in each transformer station of electric power system widely, the manufacturer that this device relates to is too much and product type is too complicated, its shortcoming is: 1, because manufacturer is too much, therefore once device breaks down, and need return different manufacturers and change, waste a large amount of time, especially the device of part model stops production, waits for the overlong time of upgrading, causes the risk of station power use system bus loss of pressure to increase; 2, product type is too complicated, is unfavorable for safeguarding, simultaneously for guaranteeing that plant failure can quick solution, needing the reserve arrangement of each product type of a large amount of deposit, thus wasting a large amount of financial resources.
Summary of the invention
Embodiment of the present invention technical problem to be solved is, the apparatus and method that a kind of Substation Station using electricity system prepared auto restart is emergent are provided, traditional backup auto-activating device is substituted when can be used for urgent, its structure is simple, be convenient to safeguard, avoid the risk of the long-time decompression of bus in this station, side, thus save a large amount of financial resources and time, run for the safety of station power use system and stability and provide guarantee.
In order to solve the problems of the technologies described above, embodiments provide the device that a kind of Substation Station using electricity system prepared auto restart is emergent, comprising sampling unit, protected location, switching transistor and logic control element; Wherein,
One end of described sampling unit is connected with one end of described protected location, and the other end is connected with the source electrode of described switching transistor, and described sampling unit comprises this side switch, bus connection switch, voltage sample module and current sample module; Wherein, the two ends of this side switch described are connected with bus in this station, side electric power incoming line, this station, side respectively; One end of described bus connection switch is connected with bus in offside station, and the other end is connected with bus in this station, side described; The two ends of described voltage sample module are connected with this station, side electric power incoming line described, offside station electric power incoming line, respectively for the three-phase voltage value of this station, side electric power incoming line and offside station electric power incoming line described in Real-time Collection; Described current sample module is connected with bus in this station, side described, for the three-phase electricity flow valuve of bus in this station, side described in Real-time Collection;
The other end of described protected location is connected with the grid of described switching transistor, for the size of the three-phase electricity flow valuve of bus in this station, side described in arriving according to described Real-time Collection, determine current operation mode, and send corresponding level signal according to the described current operation mode determined to described switching transistor; Wherein, described current operation mode comprises protected mode and normal mode, and level signal corresponding to described protected mode is low level signal, and the level signal that described normal mode is corresponding is high level signal;
The drain electrode of described switching transistor is connected with described logic control element, for the height of level signal sent according to described protected location, realizes being turned on or off between described sampling unit and described logic control element;
Described logic control element, for during with described sampling unit conducting, the size of the three-phase voltage value of this station, side electric power incoming line and offside station electric power incoming line described in arriving according to described Real-time Collection, to determine to enable in this station, side electric power incoming line described or described offside station bus to bussed supply in this station, side described.
Wherein, described logic control element comprises the first voltage relay, the second voltage relay, auxiliary relay and direct voltage source; Wherein, described first voltage relay, the second voltage relay are in series into a circuit with auxiliary relay three, and described in the circuit that is in series and described direct voltage source be in parallel;
Described first voltage relay, during for described logic control element and described sampling unit conducting, the size of the three-phase voltage value of this station, side electric power incoming line described in arriving according to described Real-time Collection, determines to be in disconnection or closure state;
Described second voltage relay, during for described logic control element and described sampling unit conducting, the size of the three-phase voltage value of the described offside station electric power incoming line arrived according to described Real-time Collection, determines to be in disconnection or closure state;
Described auxiliary relay, during for described logic control element and described sampling unit conducting, according to the open and-shut mode of described the first voltage relay of determining and the second voltage relay, determine to be in disconnection or closure state, realize the control of the open and-shut mode to this side switch described and bus connection switch, thus to determine to enable in this station, side electric power incoming line described or described offside station bus to bussed supply in this station, side described.
Wherein, when described logic control element and described sampling unit conducting, and described Real-time Collection to described in this station, side electric power incoming line three-phase voltage value at least one phase voltage value be less than default voltage threshold and in the three-phase voltage value of described offside station electric power incoming line, each phase voltage value is all greater than described default voltage threshold time, described first voltage relay and described voltage second relay all closed, described auxiliary relay is closed, thus described in the circuit that is in series form a connection circuit, when with described sampling unit conducting, described auxiliary relay controls this side switch disconnection described and controls described bus connection switch to close, determine to enable in described offside station bus to bussed supply in this station, side described.
Wherein, when described logic control element and described sampling unit conducting, and described Real-time Collection to described in each phase voltage value is all greater than default voltage threshold in this station, side electric power incoming line three-phase voltage value time, described first voltage relay disconnects, described auxiliary relay is disconnected, thus described in the circuit that is in series be off state, when with described sampling unit conducting, described auxiliary relay controls this side switch described and closes and control the disconnection of described bus connection switch, determines to enable this station, side electric power incoming line described to bussed supply in this station, side described.
Wherein, described protected mode comprises overcurrent protection pattern and zero-sequenceprotection pattern; Wherein,
When described Real-time Collection to this station, side in bus three-phase electricity flow valuve in arbitrary current value be greater than the first default current threshold time, described protected location enters overcurrent protection pattern, control this side switch described to disconnect, and send low level signal to described switching transistor, described switching transistor is disconnected, realizes the separated of described sampling unit and described logic control element;
When described Real-time Collection to this station, side in bus three-phase electricity flow valuve in three-phase electricity flow valuve summation 1/3rd be greater than the second default current threshold time; described protected location enters zero-sequenceprotection pattern; control this side switch described to disconnect; and send low level signal to described switching transistor; described switching transistor is disconnected, realizes the separated of described sampling unit and described logic control element.
Wherein, described current sample module comprises three current transformers, and described three current transformers are the current transformer based on Luo-coil, is socketed one by one respectively with the threephase cable of bus in this station, side described.
Wherein, described voltage sample module comprises six voltage fuses, and wherein, three voltage fuses are connected one by one with the three-phase inlet wire of this station, side power supply described respectively, and another three voltage fuses are connected one by one with the three-phase inlet wire of described offside station power supply respectively.
The embodiment of the present invention additionally provides a kind of emergent method of Substation Station using electricity system prepared auto restart, and it realizes in the emergent device of aforesaid Substation Station using electricity system prepared auto restart, and described method comprises:
The three-phase electricity flow valuve of bus in the three-phase voltage value of this station, side electric power incoming line of Real-time Collection, the three-phase voltage value of offside station electric power incoming line and this station, side;
In this station, side described in arriving according to described Real-time Collection, the size of the three-phase electricity flow valuve of bus, determines current operation mode, and sends corresponding level signal according to the described current operation mode determined; Wherein, described current operation mode comprises protected mode and normal mode, and level signal corresponding to described protected mode is low level signal, and the level signal that described normal mode is corresponding is high level signal;
Receive the level signal of described transmission, and according to the height of the described level signal received, the switch instances between judging to the circuit of bussed supply in this station, side described;
When can realize switching between the circuit giving bussed supply in this station, side described, the size of the three-phase voltage value of this station, side electric power incoming line and offside station electric power incoming line described in arriving according to described Real-time Collection, to determine to enable in this station, side electric power incoming line described or described offside station bus to bussed supply in this station, side described.
Wherein, described arrive according to described Real-time Collection described in the size of the three-phase electricity flow valuve of bus in this station, side, determine current operation mode, and comprise according to the concrete steps that the described current operation mode determined sends corresponding level signal:
When described Real-time Collection to this station, side in bus three-phase electricity flow valuve in arbitrary current value be greater than the first default current threshold time, determine that current operation mode is the overcurrent protection pattern in protected mode, and send described low level signal;
When described Real-time Collection to this station, side in bus three-phase electricity flow valuve in three-phase electricity flow valuve summation 1/3rd be greater than the second default current threshold time, determine that current operation mode is the zero-sequenceprotection pattern in protected mode, and send described low level signal;
When described Real-time Collection to this station, side in bus three-phase electricity flow valuve in arbitrary current value be less than described the first default current threshold and 1/3rd of three-phase electricity flow valuve summation be less than described the second default current threshold time, determine that current operation mode is normal mode, and send described high level signal.
Wherein, described when can realize between to the circuit of bussed supply in this station, side described switching, the size of the three-phase voltage value of this station, side electric power incoming line and offside station electric power incoming line described in arriving according to described Real-time Collection, determine to enable bus in this station, side electric power incoming line described or described offside station and comprise to the concrete steps of bussed supply in this station, side described:
When described Real-time Collection to described in this station, side electric power incoming line three-phase voltage value at least one phase voltage value be less than default voltage threshold and in the three-phase voltage value of described offside station electric power incoming line, each phase voltage value is all greater than described default voltage threshold time, to determine to enable in described offside station bus to bussed supply in this station, side described;
When described Real-time Collection to described in each phase voltage value is all greater than default voltage threshold in this station, side electric power incoming line three-phase voltage value time, determine to enable this station, side electric power incoming line described to bussed supply in this station, side described.
Implement the embodiment of the present invention, there is following beneficial effect:
1, in embodiments of the present invention, because the current transformer in device is based on Luo-coil, net weight is extremely low, installation is simple and convenient disassembly, overcomes conventional current instrument transformer installation site and fixes, dismounting shortcoming not easily.
2, in embodiments of the present invention; owing to containing sampling unit, protected location and logic control element in device; its structure is simple, be convenient to safeguard; and sampling unit is completely independent; be convenient to the rapid installation and debugging of operation maintenance personnel; avoid the risk of the long-time decompression of bus in this station, side, simultaneously with the defencive function of zero-sequenceprotection and overcurrent protection.
3, in embodiments of the present invention, device exchange in inlet wire screen owing to can be arranged on arbitrary Substation Station using electricity system bus, it is for substituting traditional backup auto-activating device time urgent, overcome the drawback that traditional approach deposit spare part causes the wasting of resources, turnaround time length.
Accompanying drawing explanation
In order to be illustrated more clearly in the embodiment of the present invention or technical scheme of the prior art, be briefly described to the accompanying drawing used required in embodiment or description of the prior art below, apparently, accompanying drawing in the following describes is only some embodiments of the present invention, for those of ordinary skill in the art, under the prerequisite not paying creative work, the accompanying drawing obtaining other according to these accompanying drawings still belongs to category of the present invention.
Fig. 1 is the application scenarios schematic diagram of 380V main offside station power use system backup auto-activating device in prior art;
The structural representation of the device that Fig. 2 meets an urgent need for the Substation Station using electricity system prepared auto restart that the embodiment of the present invention provides;
Fig. 3 is the structural representation of logic control element in Fig. 2;
The flow chart of the method that Fig. 4 meets an urgent need for the Substation Station using electricity system prepared auto restart that the embodiment of the present invention provides.
Embodiment
For making the object, technical solutions and advantages of the present invention clearly, below in conjunction with accompanying drawing, the present invention is described in further detail.
As shown in Figure 2, the device that the embodiment of the present invention provides a kind of Substation Station using electricity system prepared auto restart emergent, be arranged in the inlet wire screen in arbitrary Substation Station, realize the switching between this station, side power supply and offside station power supply, easy for describing, illustrate for the device that the station power use system prepared auto restart being arranged at this station, side is emergent below.The device that Substation Station using electricity system prepared auto restart in the embodiment of the present invention is emergent, this device comprises sampling unit 1, protected location 2, switching transistor 3 and logic control element 4; Wherein,
One end of sampling unit 1 is connected with one end of protected location 2, and the other end is connected with the source S of switching transistor 3, and it comprises this side K switch 1, bus connection switch K2, voltage sample module 11 and current sample module 12; Wherein, the two ends of this side K switch 1 are connected with bus c in this station, side electric power incoming line a, this station, side respectively; One end of bus connection switch K2 is connected with bus d in offside station, and the other end is connected with bus c in this station, side; The two ends of voltage sample module 11 are connected with this station, side electric power incoming line a, offside station electric power incoming line b respectively, for the three-phase voltage value of this station, side of Real-time Collection with electric power incoming line a and offside station electric power incoming line b; Current sample module 12 is connected with bus c in this station, side, for the three-phase electricity flow valuve of bus c in this station, side of Real-time Collection;
The other end of protected location 2 is connected with the grid G of switching transistor 3, for the size of the three-phase electricity flow valuve of bus c in this station, side of arriving according to Real-time Collection, determine current operation mode, and send corresponding level signal according to the current operation mode determined to switching transistor 3; Wherein, current operation mode comprises protected mode and normal mode, and level signal corresponding to protected mode is low level signal, and the level signal that normal mode is corresponding is high level signal;
The drain D andlogic control unit 4 of switching transistor 3 is connected, and for the height of level signal sent according to protected location 2, realizes being turned on or off between sampling unit 1 andlogic control unit 4;
Logic control element 4, for when with sampling unit 1 conducting, the size of this station, side electric power incoming line a arrived according to Real-time Collection and the three-phase voltage value of offside station electric power incoming line b, determines to enable this station, side electric power incoming line a or offside station electric power incoming line b.
It should be noted that the voltage of bus d in the voltage or offside station that are obtained through transformation process by the voltage of this station, side electric power incoming line a can meet the voltage instructions for use of bus c in this station, side.
In whole device, voltage sample module 11 in sampling unit 1 comprises six voltage fuses, wherein there are three for the voltage fuse of the three-phase voltage value of this station, side of Real-time Collection electric power incoming line a, these three voltage fuses are connected one by one with the three-phase inlet wire of this station, side power supply respectively, also three are had in addition for the voltage fuse of the three-phase voltage value of Real-time Collection offside station electric power incoming line b, they are also connected with the three-phase inlet wire of offside station power supply respectively one by one, the structure of these six voltage fuses is all identical, and the scope that can gather magnitude of voltage is all between 0V to 460V.
Current sample module 12 in sampling unit 1 comprises three current transformers for the three-phase electricity flow valuve of bus c in this station, side of Real-time Collection, these three current transformers are the current transformer based on Luo-coil, and be socketed one by one with the threephase cable of bus c in this station, side respectively, the scope that can gather current value is all between 0A to 2500A.Because the net weight of each current transformer is extremely low, install simple and convenient disassembly, overcome conventional current instrument transformer installation site to fix, dismounting shortcoming not easily, therefore there is the sampling unit 1 of standalone module and switch designs, its structure is simple, be convenient to the rapid installation and debugging of operation maintenance personnel, avoid the risk of the long-time decompression of this side station power use system bus c.
This side K switch 1 regardless of this station, side closes and bus connection switch K2 disconnects, reliable and stable 380V AC power is provided by giving bus c in this station, side after the electric power incoming line a transformation of this station, side, or this side K switch 1 at this station, side disconnects and bus connection switch K2 closes, there is provided reliable and stable 380V AC power to bus c in this station, side by bus d in offside station, current sample module 12 in sampling unit 1 all can the three-phase electricity flow valuve of bus c in Real-time Collection to this station, side, protected location 2 is according to the size of the three-phase electricity flow valuve of bus c in sampling module 12 Real-time Collection to this station, side, determine current operation mode, and send corresponding level signal according to the current operation mode determined to switching transistor 3.
When Real-time Collection to this station, side in bus c three-phase electricity flow valuve in arbitrary current value be greater than in protected location 2 preset the first current threshold time, protected location 2 enters overcurrent protection pattern, control this side K switch 1 to disconnect, and send low level signal to switching transistor 3, switching transistor 3 is disconnected, realizes the separated of sampling unit 1 andlogic control unit 4; When Real-time Collection to this station, side in bus c three-phase electricity flow valuve in three current value summations 1/3rd be greater than in protected location 2 preset the second current threshold time, protected location 2 enters zero-sequenceprotection pattern, control this side K switch 1 to disconnect, and send low level signal to switching transistor 3, switching transistor 3 is disconnected, realizes the separated of sampling unit 1 andlogic control unit 4; When aforementioned above two kinds of protected modes are enabled, all can cut off the connection between sampling unit 1 andlogic control unit 4, thus interrupt bus d in this station, side electric power incoming line a and offside station and power to bus c in this station, side, the prepared auto restart handoff functionality of this device of locking.
When Real-time Collection to this station, side in bus c three-phase electricity flow valuve in arbitrary current value be less than in protected location 2 preset the first current threshold; and 1/3rd of three-phase electricity flow valuve summation be less than in protected location 2 preset the second current threshold time; protected location 2 keeps current normal mode; and send high level signal to switching transistor 3; switching transistor 3 is closed, realizes conducting between sampling unit 1 andlogic control unit 4.Should be noted that; when getting back to again normal mode after protected location 2 enables protected mode; no matter enable this station, side electric power incoming line a or enable bus d in offside station and power to bus c in this station, side, in this station, side, bus c supply power mode all can remain the supply power mode before protected location 2 enables protected mode.
In order to when with sampling unit 1 conducting; logic control element 4 can realize the change controlling this side K switch 1 and bus connection switch K2 open and-shut mode; thus reach realize this station, side electric power incoming line a lost efficacy time; the effect of bus d in offside station can be switched to; as shown in Figure 3, a relay protection circuit is adopted to carry out design logic control unit 4 in a device.This logic control element 4 comprises the first voltage relay J1, the second voltage relay J2, auxiliary relay J3 and direct voltage source 31; Wherein, the first voltage relay J1, the second voltage relay J2 are in series into a relay protection circuit with auxiliary relay J3 three, and this circuit be in series and direct voltage source 31 are in parallel;
First voltage relay J1, for during with sampling unit 1 conducting, the size of the three-phase voltage value of this station, side electric power incoming line a arrived according to Real-time Collection, determines to be in disconnection or closure state;
Second voltage relay J2, for during with sampling unit 1 conducting, the size of the three-phase voltage value of the offside station electric power incoming line b arrived according to Real-time Collection, determines to be in disconnection or closure state;
Auxiliary relay J3, for during with sampling unit 1 conducting, according to the open and-shut mode of the first relay J 1 determined and the second relay J 2, determine to be in disconnection or closure state, realize the control of the open and-shut mode to this side K switch 1 and bus connection switch K2, thus determine to enable bus d in this station, side electric power incoming line a or offside station and power to bus c in this station, side.
With sampling unit 1 conducting, and Real-time Collection to this station, side electric power incoming line a three-phase voltage value at least one magnitude of voltage be less than predetermined voltage threshold and in the three-phase voltage value of offside station electric power incoming line b, each magnitude of voltage is all greater than predetermined voltage threshold time, first voltage relay J1 and the second voltage relay J2 is all closed, auxiliary relay J3 is closed, thus the aforementioned circuit be in series forms a connection circuit, auxiliary relay J3 control this side K switch 1 disconnect and control bus connection switch K2 close, determine to enable bus d in offside station to power to bus c in this station, side.
With sampling unit 1 conducting, and Real-time Collection to this station, side electric power incoming line a three-phase voltage value in each magnitude of voltage be all greater than predetermined voltage threshold time, first voltage relay J1 disconnects, auxiliary relay J3 is disconnected, thus the aforementioned circuit be in series is off state, auxiliary relay J3 controls this side K switch 1 and closes and control bus connection switch K2 disconnection, determines that enabling this station, side electric power incoming line a powers to bus c in this station, side.
Further, direct voltage source 31 comprises 110V DC power supply and 220V DC power supply, when adopting 220V DC power supply, needs an electric pressure converter for 220V direct voltage is transformed into 110V direct voltage.
As an example, three voltage fuses are installed on the inlet wire cable of this station, side power supply, gather the three-phase voltage value U11 of this station, side electric power incoming line a, U12, U13, three voltage fuses are installed on the inlet wire cable of offside station power supply, gather the three-phase voltage value U21 of offside station electric power incoming line b, U22, U23, and three current transformers to be installed in this station, side on 380V bus c, gather the three-phase electricity flow valuve Ia of 380V bus c in this station, side, Ib, Ic;
In this collected station, side, in the three-phase electricity flow valuve Ia of bus c, Ib, Ic, any one current value is greater than built-in overcurrent protection definite value (being namely greater than the first default current threshold), then overcurrent protection starts, control this side K switch 1 to disconnect, send low level signal to switching transistor 3, switching transistor 3 is disconnected, realize the separated of sampling unit 1 andlogic control unit 4, the prepared auto restart handoff functionality of locking device; When the three-phase electricity flow valuve Ia of collected bus c, Ib, Ic tri-current value summation 1/3rd be greater than built-in zero-sequenceprotection definite value (being namely greater than the second default current threshold), then zero-sequenceprotection starts, control this side K switch 1, send low level signal to switching transistor 3, switching transistor 3 is disconnected, realize the separated of sampling unit 1 andlogic control unit 4, the prepared auto restart handoff functionality of locking device;
Between sampling unit 1 andlogic control unit 4 during conducting, device can realize prepared auto restart handoff functionality, as this collected station, side three-phase voltage value U11 of electric power incoming line a, U12, in U13, at least one magnitude of voltage is less than predetermined voltage threshold (as dropping to 20% of primary voltage value), first voltage relay J1 closes, the three-phase voltage value U21 of the offside station electric power incoming line b collected, U22, U23 voltage is normal, i.e. U21, U22, U23 is all greater than predetermined voltage threshold, now the second voltage relay J2 closes, because the first voltage relay J1 and the second voltage relay J2 is all closed, auxiliary relay J3 is made to be excited and to close, now auxiliary relay J3 and the first voltage relay J1, second voltage relay J2 and direct voltage source 31 form a connection circuit, thus auxiliary relay J3 control this side K switch 1 disconnect and control bus connection switch K2 close, device will switch to bus d in offside station and power to bus c in this station, side, when the three-phase voltage value U11 of collected this station, side electric power incoming line a, U12, U13 voltage are normal, namely U11, U12, U13 are all greater than predetermined voltage threshold, first voltage relay J1 disconnects, auxiliary relay J3 is disconnected, the circuit that auxiliary relay J3 and the first voltage relay J1, the second voltage relay J2 and direct voltage source 31 are formed is off state, thus auxiliary relay J3 to control this side K switch 1 closed and control bus connection switch K3 and disconnect, switchings is returned this station, side electric power incoming line a and is powered to bus c in this station, side by device.
As shown in Figure 4, a kind of method that the embodiment of the present invention also provides Substation Station using electricity system prepared auto restart emergent, it realizes in the emergent device of aforementioned Substation Station using electricity system prepared auto restart, and described method comprises:
The three-phase electricity flow valuve of bus in the three-phase voltage value of this station, side electric power incoming line of step S101, Real-time Collection, the three-phase voltage value of offside station electric power incoming line and this station, side;
Step S102, to arrive according to described Real-time Collection described in the size of the three-phase electricity flow valuve of bus in this station, side, determine current operation mode, and send corresponding level signal according to the described current operation mode determined; Wherein, described current operation mode comprises protected mode and normal mode, and level signal corresponding to described protected mode is low level signal, and the level signal that described normal mode is corresponding is high level signal;
Detailed process is, protected mode comprises overcurrent protection pattern and zero-sequenceprotection pattern, when Real-time Collection to this station, side in bus three-phase electricity flow valuve in arbitrary current value be greater than the first default current threshold time, determine that current operation mode is overcurrent protection pattern, and send low level signal; When Real-time Collection to this station, side in bus three-phase electricity flow valuve in three-phase electricity flow valuve summation 1/3rd be greater than the second default current threshold time, determine that current operation mode is zero-sequenceprotection pattern, and send low level signal; When Real-time Collection to this station, side in bus three-phase electricity flow valuve in arbitrary current value be less than the first default current threshold and 1/3rd of three-phase electricity flow valuve summation be less than the second default current threshold time, determine that current operation mode is normal mode, and send high level signal.
Step S103, receive the level signal of described transmission, and according to the height of the described level signal received, the switch instances between judging to the circuit of bussed supply in this station, side described;
Detailed process is, when the level signal received is high level signal, switches to realizing between the circuit of bussed supply in this station, side; When the level signal received is low level signal, switch to realizing between the circuit of bussed supply in this station, side.
Step S104, when can realize switching between the circuit giving bussed supply in this station, side described, the size of the three-phase voltage value of this station, side electric power incoming line and offside station electric power incoming line described in arriving according to described Real-time Collection, to determine to enable in this station, side electric power incoming line described or described offside station bus to bussed supply in this station, side described.
Detailed process is, can realize switching between the circuit giving bussed supply in this station, side, and Real-time Collection to this station, side electric power incoming line three-phase voltage value at least one phase voltage value be less than default voltage threshold and in the three-phase voltage value of offside station electric power incoming line, each phase voltage value is all greater than default voltage threshold time, to determine to enable in offside station bus to bussed supply in this station, side;
Can realize switching between the circuit giving bussed supply in this station, side, and Real-time Collection to this station, side electric power incoming line three-phase voltage value in each phase voltage value be all greater than default voltage threshold time, determine to enable this station, side electric power incoming line to bussed supply in this station, side.
Implement the embodiment of the present invention, there is following beneficial effect:
1, in embodiments of the present invention, because the current transformer in device is based on Luo-coil, net weight is extremely low, installation is simple and convenient disassembly, overcomes conventional current instrument transformer installation site and fixes, dismounting shortcoming not easily.
2, in embodiments of the present invention; owing to containing sampling unit, protected location and logic control element in device; its structure is simple, be convenient to safeguard; and sampling unit is completely independent; be convenient to the rapid installation and debugging of operation maintenance personnel; avoid the risk of the long-time decompression of bus in this station, side, simultaneously with the defencive function of zero-sequenceprotection and overcurrent protection.
3, in embodiments of the present invention, device exchange in inlet wire screen owing to can be arranged on arbitrary Substation Station using electricity system bus, it is for substituting traditional backup auto-activating device time urgent, overcome the drawback that traditional approach deposit spare part causes the wasting of resources, turnaround time length.
It should be noted that in said system embodiment, each included system unit is carry out dividing according to function logic, but is not limited to above-mentioned division, as long as can realize corresponding function; In addition, the concrete title of each functional unit, also just for the ease of mutual differentiation, is not limited to protection scope of the present invention.
One of ordinary skill in the art will appreciate that all or part of step realized in above-described embodiment method is that the hardware that can carry out instruction relevant by program has come, described program can be stored in a computer read/write memory medium, described storage medium, as ROM/RAM, disk, CD etc.
Above disclosedly be only a kind of preferred embodiment of the present invention, certainly can not limit the interest field of the present invention with this, therefore according to the equivalent variations that the claims in the present invention are done, still belong to the scope that the present invention is contained.
Claims (10)
1. the device that Substation Station using electricity system prepared auto restart is emergent, is characterized in that, comprise sampling unit, protected location, switching transistor and logic control element; Wherein,
One end of described sampling unit is connected with one end of described protected location, and the other end is connected with the source electrode of described switching transistor, and described sampling unit comprises this side switch, bus connection switch, voltage sample module and current sample module; Wherein, the two ends of this side switch described are connected with bus in this station, side electric power incoming line, this station, side respectively; One end of described bus connection switch is connected with bus in offside station, and the other end is connected with bus in this station, side described; The two ends of described voltage sample module are connected with this station, side electric power incoming line described, offside station electric power incoming line, respectively for the three-phase voltage value of this station, side electric power incoming line and offside station electric power incoming line described in Real-time Collection; Described current sample module is connected with bus in this station, side described, for the three-phase electricity flow valuve of bus in this station, side described in Real-time Collection;
The other end of described protected location is connected with the grid of described switching transistor, for the size of the three-phase electricity flow valuve of bus in this station, side described in arriving according to described Real-time Collection, determine current operation mode, and send corresponding level signal according to the described current operation mode determined to described switching transistor; Wherein, described current operation mode comprises protected mode and normal mode, and level signal corresponding to described protected mode is low level signal, and the level signal that described normal mode is corresponding is high level signal;
The drain electrode of described switching transistor is connected with described logic control element, for the height of level signal sent according to described protected location, realizes being turned on or off between described sampling unit and described logic control element;
Described logic control element, for during with described sampling unit conducting, the size of the three-phase voltage value of this station, side electric power incoming line and offside station electric power incoming line described in arriving according to described Real-time Collection, to determine to enable in this station, side electric power incoming line described or described offside station bus to bussed supply in this station, side described.
2. the device that Substation Station using electricity system prepared auto restart as claimed in claim 1 is emergent, it is characterized in that, described logic control element comprises the first voltage relay, the second voltage relay, auxiliary relay and direct voltage source; Wherein, described first voltage relay, the second voltage relay are in series into a circuit with auxiliary relay three, and described in the circuit that is in series and described direct voltage source be in parallel;
Described first voltage relay, during for described logic control element and described sampling unit conducting, the size of the three-phase voltage value of this station, side electric power incoming line described in arriving according to described Real-time Collection, determines to be in disconnection or closure state;
Described second voltage relay, during for described logic control element and described sampling unit conducting, the size of the three-phase voltage value of the described offside station electric power incoming line arrived according to described Real-time Collection, determines to be in disconnection or closure state;
Described auxiliary relay, during for described logic control element and described sampling unit conducting, according to the open and-shut mode of described the first voltage relay of determining and the second voltage relay, determine to be in disconnection or closure state, realize the control of the open and-shut mode to this side switch described and bus connection switch, thus to determine to enable in this station, side electric power incoming line described or described offside station bus to bussed supply in this station, side described.
3. the device that Substation Station using electricity system prepared auto restart as claimed in claim 2 is emergent, it is characterized in that, when described logic control element and described sampling unit conducting, and described Real-time Collection to described in this station, side electric power incoming line three-phase voltage value at least one phase voltage value be less than default voltage threshold and in the three-phase voltage value of described offside station electric power incoming line, each phase voltage value is all greater than described default voltage threshold time, described first voltage relay and described voltage second relay all closed, described auxiliary relay is closed, thus described in the circuit that is in series form a connection circuit, described auxiliary relay controls this side switch disconnection described and controls described bus connection switch to close, determine to enable in described offside station bus to bussed supply in this station, side described.
4. the device that Substation Station using electricity system prepared auto restart as claimed in claim 2 is emergent, it is characterized in that, when described logic control element and described sampling unit conducting, and described Real-time Collection to described in each phase voltage value is all greater than default voltage threshold in this station, side electric power incoming line three-phase voltage value time, described first voltage relay disconnects, described auxiliary relay is disconnected, thus described in the circuit that is in series be off state, described auxiliary relay controls this side switch described and closes and control the disconnection of described bus connection switch, determine to enable this station, side electric power incoming line described to bussed supply in this station, side described.
5. the device that Substation Station using electricity system prepared auto restart as claimed in claim 1 is emergent, it is characterized in that, described protected mode comprises overcurrent protection pattern and zero-sequenceprotection pattern; Wherein,
When described Real-time Collection to this station, side in bus three-phase electricity flow valuve in arbitrary current value be greater than the first default current threshold time, described protected location enters overcurrent protection pattern, control this side switch described to disconnect, and send low level signal to described switching transistor, described switching transistor is disconnected, realizes the separated of described sampling unit and described logic control element;
When described Real-time Collection to this station, side in bus three-phase electricity flow valuve in three-phase electricity flow valuve summation 1/3rd be greater than the second default current threshold time; described protected location enters zero-sequenceprotection pattern; control this side switch described to disconnect; and send low level signal to described switching transistor; described switching transistor is disconnected, realizes the separated of described sampling unit and described logic control element.
6. the device that the Substation Station using electricity system prepared auto restart according to any one of claim 1 to 5 is emergent, it is characterized in that, described current sample module comprises three current transformers, described three current transformers are the current transformer based on Luo-coil, are socketed one by one respectively with the threephase cable of bus in this station, side described.
7. the device that Substation Station using electricity system prepared auto restart as claimed in claim 6 is emergent, it is characterized in that, described voltage sample module comprises six voltage fuses, wherein, three voltage fuses are connected one by one with the three-phase inlet wire of this station, side power supply described respectively, and another three voltage fuses are connected one by one with the three-phase inlet wire of described offside station power supply respectively.
8. the method that Substation Station using electricity system prepared auto restart is emergent, is characterized in that, it realizes in the emergent device of the Substation Station using electricity system prepared auto restart such as according to any one of claim 1 to 7, and described method comprises:
The three-phase electricity flow valuve of bus in the three-phase voltage value of this station, side electric power incoming line of Real-time Collection, the three-phase voltage value of offside station electric power incoming line and this station, side;
In this station, side described in arriving according to described Real-time Collection, the size of the three-phase electricity flow valuve of bus, determines current operation mode, and sends corresponding level signal according to the described current operation mode determined; Wherein, described current operation mode comprises protected mode and normal mode, and level signal corresponding to described protected mode is low level signal, and the level signal that described normal mode is corresponding is high level signal;
Receive the level signal of described transmission, and according to the height of the described level signal received, the switch instances between judging to the circuit of bussed supply in this station, side described;
When can realize switching between the circuit giving bussed supply in this station, side described, the size of the three-phase voltage value of this station, side electric power incoming line and offside station electric power incoming line described in arriving according to described Real-time Collection, to determine to enable in this station, side electric power incoming line described or described offside station bus to bussed supply in this station, side described.
9. method as claimed in claim 8, it is characterized in that, described arrive according to described Real-time Collection described in the size of the three-phase electricity flow valuve of bus in this station, side, determine current operation mode, and comprise according to the concrete steps that the described current operation mode determined sends corresponding level signal:
When described Real-time Collection to this station, side in bus three-phase electricity flow valuve in arbitrary current value be greater than the first default current threshold time, determine that current operation mode is the overcurrent protection pattern in protected mode, and send described low level signal;
When described Real-time Collection to this station, side in bus three-phase electricity flow valuve in three-phase electricity flow valuve summation 1/3rd be greater than the second default current threshold time, determine that current operation mode is the zero-sequenceprotection pattern in protected mode, and send described low level signal;
When described Real-time Collection to this station, side in bus three-phase electricity flow valuve in arbitrary current value be less than described the first default current threshold and 1/3rd of three-phase electricity flow valuve summation be less than described the second default current threshold time, determine that current operation mode is normal mode, and send described high level signal.
10. method as claimed in claim 8, it is characterized in that, described when can realize between to the circuit of bussed supply in this station, side described switching, the size of the three-phase voltage value of this station, side electric power incoming line and offside station electric power incoming line described in arriving according to described Real-time Collection, determine to enable bus in this station, side electric power incoming line described or described offside station and comprise to the concrete steps of bussed supply in this station, side described:
When described Real-time Collection to described in this station, side electric power incoming line three-phase voltage value at least one phase voltage value be less than default voltage threshold and in the three-phase voltage value of described offside station electric power incoming line, each phase voltage value is all greater than described default voltage threshold time, to determine to enable in described offside station bus to bussed supply in this station, side described;
When described Real-time Collection to described in each phase voltage value is all greater than default voltage threshold in this station, side electric power incoming line three-phase voltage value time, determine to enable this station, side electric power incoming line described to bussed supply in this station, side described.
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