CN112271710A - Self-healing control system and method for mine power distribution network - Google Patents
Self-healing control system and method for mine power distribution network Download PDFInfo
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- 238000005065 mining Methods 0.000 claims description 24
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H7/00—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions
- H02H7/26—Sectionalised protection of cable or line systems, e.g. for disconnecting a section on which a short-circuit, earth fault, or arc discharge has occured
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H7/00—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions
- H02H7/22—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for distribution gear, e.g. bus-bar systems; for switching devices
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H7/00—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions
- H02H7/26—Sectionalised protection of cable or line systems, e.g. for disconnecting a section on which a short-circuit, earth fault, or arc discharge has occured
- H02H7/261—Sectionalised protection of cable or line systems, e.g. for disconnecting a section on which a short-circuit, earth fault, or arc discharge has occured involving signal transmission between at least two stations
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H7/00—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions
- H02H7/26—Sectionalised protection of cable or line systems, e.g. for disconnecting a section on which a short-circuit, earth fault, or arc discharge has occured
- H02H7/261—Sectionalised protection of cable or line systems, e.g. for disconnecting a section on which a short-circuit, earth fault, or arc discharge has occured involving signal transmission between at least two stations
- H02H7/262—Sectionalised protection of cable or line systems, e.g. for disconnecting a section on which a short-circuit, earth fault, or arc discharge has occured involving signal transmission between at least two stations involving transmissions of switching or blocking orders
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H7/00—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions
- H02H7/26—Sectionalised protection of cable or line systems, e.g. for disconnecting a section on which a short-circuit, earth fault, or arc discharge has occured
- H02H7/28—Sectionalised protection of cable or line systems, e.g. for disconnecting a section on which a short-circuit, earth fault, or arc discharge has occured for meshed systems
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Abstract
The invention discloses a self-healing control system and a self-healing control method for a mine power distribution network, and the self-healing control system comprises a ground substation feeder line protection system, wherein the ground substation feeder line protection system is arranged in a ground substation and is used for carrying out short-circuit protection on a ground substation feeder line; the distributed network protection systems of the underground power substations are respectively and correspondingly arranged at the underground power substations, and the distributed network protection systems of the temporary power distribution points are respectively and correspondingly arranged at the temporary power distribution points; according to the invention, through the hierarchical arrangement, the switch tripping in the transformer substation of the previous stage can not be caused when the short-circuit fault occurs, the override tripping phenomenon possibly caused by the short-circuit fault can be effectively avoided, the fault can be accurately and quickly isolated, the power supply of a non-fault bus or line is recovered, and the power failure influence area of the short-circuit fault tripping is reduced to the maximum extent; and each underground substation and each temporary power distribution point adopt a distributed network protection system, so that excessive dependence on an optical fiber network is avoided, and quick and delay-free transmission of information is ensured.
Description
Technical Field
The invention belongs to the technical field of power distribution networks, and particularly relates to a self-healing control system and method for a mine power distribution network.
Background
The mine power distribution network comprises a ground substation arranged on the ground and a multi-stage substation arranged underground, wherein the underground substation adopts a single-bus sectional wiring mode and is provided with a plurality of feeder lines, and the length of a cable is generally short; the underground distribution switches have short-circuit current switching-on and switching-off capacity, the electromagnetic starter also has certain short-circuit current switching-on and switching-off capacity, and the circuit breakers are not allowed to be overlapped when the underground short-circuit fault occurs; the interphase short-circuit fault is generally instantaneously developed into a three-phase short-circuit, and the short-circuit current is very large; for an underground substation or a temporary distribution point, under the condition of short-circuit fault, fault currents flowing through a power supply circuit breaker, a communication circuit breaker and a feeder circuit breaker are very close to the same (when the load of a non-fault line is small) and have the same direction, a quick-break protection device cannot be distinguished sometimes when the short-circuit fault occurs, and the protection ranges of the quick-break protection device are overlapped; although the upper and lower stages have a certain level difference during design, the level difference cannot play a role of graded tripping under certain conditions, so that the upper and lower stages can act simultaneously or the upper stage acts first to cause override tripping.
The conventional mode for preventing override trip of a mine power distribution network comprises the following steps: a conventional power monitoring system solution, an optical fiber longitudinal differential protection solution, an integrated protection solution and an intelligent distribution network solution; the existing schemes need to lay a large amount of optical fibers, and need to modify the mine power distribution network on a large scale, for example: laying optical fibers and replacing protection; along with the extension or adjustment of the underground power distribution network, an original manufacturer needs to be found for continuous upgrading, a system needs to be maintained by special staff, and protection override tripping can be caused once the system has problems; quick remedial measures after override tripping are not involved, and the local distributed processing function of the faults of the substation is not provided.
Disclosure of Invention
Aiming at the technical problems in the prior art, the invention provides a self-healing control system and a self-healing control method for a mine power distribution network, and aims to solve the technical problems that an existing mine power distribution network override trip prevention scheme excessively depends on an optical fiber network, does not have a substation fault on-site distributed processing function, and is poor in adaptability.
In order to achieve the purpose, the invention adopts the technical scheme that:
the invention provides a self-healing control system for a mine power distribution network, which comprises a ground substation feeder line protection system, a plurality of underground substation distributed network protection systems and a plurality of temporary power distribution point distributed network protection systems, wherein the ground substation feeder line protection systems are connected with the plurality of underground substation distributed network protection systems; the ground substation feeder protection system is arranged in a ground substation and used for carrying out short-circuit protection on a ground substation feeder;
the distributed network protection systems of the underground substation are respectively and correspondingly arranged at the underground substations, and each distributed network protection system of the underground substation comprises two underground incoming line switch protectors, a plurality of underground feeder switch protectors, an underground connection switch protector and a network switch; the two underground lead-in switch protectors are respectively arranged at lead-in switches of the underground substation, and the plurality of underground feeder switch protectors are respectively and correspondingly arranged in feeder switches of the underground substation; the underground interconnection switch protector is arranged in an interconnection switch of an underground substation; the underground incoming line switch protector, the underground feeder line switch protector and the underground interconnection switch protector are respectively connected with the network switch;
the distributed network protection systems of the plurality of temporary distribution points are respectively and correspondingly arranged at the plurality of underground temporary distribution points, and each distributed network protection system of the temporary distribution points comprises a high-voltage side switch protector, a low-voltage side feed switch protector and a shift transformer network switch; the high-voltage side switch protector is arranged at a high-voltage side switch of the temporary power distribution point, the low-voltage side feed switch protector is arranged at a low-voltage side feed switch of the temporary power distribution point, and the high-voltage side switch protector and the low-voltage side feed switch protector are both connected with the transformer network switch.
Furthermore, each underground substation distributed network protection system also comprises an underground substation communication management machine; the output ends of the underground incoming line switch protector, the underground feeder line switch protector and the underground interconnection switch protector are respectively connected with the input end of a network switch through optical fibers or an industrial Ethernet, and the output end of the network switch is connected with the input end of a communication management machine of an underground substation.
Furthermore, each temporary distribution point distributed network protection system also comprises a temporary distribution point communication manager; the output ends of the high-voltage side switch protector and the low-voltage side feed switch protector are respectively connected with the input end of the transformer network switch through optical fibers or an industrial Ethernet, and the output end of the transformer network switch is connected with the input end of the temporary power distribution point communication management machine.
Further, the underground substation distributed network protection system comprises an underground primary substation distributed network protection system and an underground secondary substation distributed network protection system;
the underground primary substation distributed network protection system is arranged in an underground primary substation and comprises two first underground incoming line switch protectors, a plurality of first underground feeder line switch protectors, a first underground connection switch protector and a first network switch; the two first underground incoming line switch protectors are respectively arranged at incoming line switches of an underground primary substation, the plurality of first underground feeder line switch protectors are respectively and correspondingly arranged in feeder line switches of the underground primary substation, and the first underground interconnection switch protectors are arranged in interconnection switches of the underground primary substation; the first underground incoming line switch protector, the first underground feeder line switch protector and the first underground interconnection switch protector are respectively connected with the first network switch;
the distributed network protection system of the underground secondary substation is arranged in the underground secondary substation and comprises two second underground incoming line switch protectors, a plurality of second underground feeder line switch protectors, a second underground contact switch protector and a second network switch; two second underground incoming line switch protectors are arranged at incoming line switches of the underground secondary substation respectively, a plurality of second underground feeder switch protectors are correspondingly arranged in feeder switches of the underground secondary substation respectively, the second underground connection switch protectors are arranged in connection switches of the underground secondary substation, and the second underground incoming line switch protectors, the second underground feeder switch protectors and the second underground connection switch protectors are connected with the second network switch respectively.
Furthermore, short-circuit protection action time limit set values of a first underground incoming line switch protector, a first underground feeder line switch protector and a first underground interconnection switch protector in the underground primary substation distributed network protection system are all 220 ms;
and the short-circuit protection action time limit set values of a second underground incoming line switch protector, a second underground feeder switch protector and a second underground interconnection switch protector in the underground secondary substation distributed network protection system are all 140 ms.
Furthermore, locking signals among the underground incoming line switch protector, the underground feeder switch protector and the underground interconnection switch protector in the underground substation distributed network protection system are transmitted and transmitted according to a GOOSE mechanism by adopting GOOSE messages.
Furthermore, an incoming switch, a feeder switch and a tie switch in the underground substation distributed network protection system are all mining fast switches; a high-voltage side switch and a low-voltage side feed switch in the temporary power distribution point are mining fast switches; the sum of the action time limit of the mining quick switch and the action time limit of the protector is less than 30 ms.
Further, the short-circuit protection operation time limit of the high-voltage side switch protector of the temporary distribution point is 60ms, and the short-circuit protection operation time limit of the low-voltage side feed switch protector is 0 ms.
Furthermore, the ground substation feeder protection system comprises a feeder switch protector, a feeder short circuit backup protector and a feeder selective grounding protector; the feeder switch protector is arranged in a feeder switch of a ground substation, wherein the short-circuit protection fixed value time limit of the feeder switch protector is 300 ms; the feeder line short circuit backup protector is arranged in a transformer of a ground substation, wherein the minimum action time limit of the feeder line short circuit backup protector is 0.5 s; the feeder line selective grounding protector is independently arranged in a screen group mode, the measuring voltage of the feeder line selective grounding protector is obtained from a ground substation bus voltage transformer, and the measuring current is obtained from a current transformer and a zero sequence current transformer of each feeder line switch of the ground substation.
The invention also provides a self-healing control method for the mine power distribution network, which specifically comprises the following steps:
in the underground substation, under the normal operation mode, the underground interconnection switch is in the brake separating position;
when any feeder line in an underground substation has a short-circuit fault, the underground incoming line switch protector and the underground feeder line switch protector detect fault information at the same time, and the underground feeder line switch protector sends a tripping locking instruction to the underground incoming line switch protector in the same bus section, and trips corresponding to the action of the feeder line switch to isolate the fault;
when a half-section bus of the underground substation has a fault, the underground incoming line switch protector on the fault bus section detects fault information, the underground incoming line switch protector does not receive a tripping locking instruction, and the incoming line switch trips to isolate the fault; meanwhile, a closing and locking instruction is sent to the underground interconnection switch protector, and the feeder switch of the upper-level underground substation connected with the closing and locking instruction does not generate misoperation tripping due to the time limit difference of protection;
when a line on one power supply side of an inlet switch of an underground substation fails, an underground feeder switch protector of a corresponding upper-level underground substation detects failure information and trips through a set time limit protection action; the inlet switch of the line at the fault is in voltage loss and brake separation, meanwhile, the bus section where the inlet switch is located is in voltage loss, and all feeder switches of the voltage loss bus section are in voltage loss and brake separation; the underground incoming line switch protectors of the non-fault lines do not send locking and closing instructions to the underground contact switch protector, the underground contact switch protector detects that voltage on two sides of the underground contact switch has single-side voltage loss, the underground contact switch starts closing, and power supply of a voltage loss bus section is recovered; after the underground interconnection switch is switched on, the underground interconnection switch protector sends a switching-on instruction to each underground feeder switch protector, and the corresponding under-voltage switching-off feeder switch is switched on.
Compared with the prior art, the invention has the beneficial effects that:
the invention provides a self-healing control system for a mine power distribution network, which is characterized in that a ground substation feeder line protection system is arranged in a ground substation, an underground substation distributed network protection system is respectively arranged in each underground substation, and a temporary distribution point distributed network protection system is arranged at each underground temporary distribution point; the protection system is arranged in a grading way, so that the switch tripping in the transformer substation of the previous stage is avoided when a short-circuit fault occurs, the override tripping phenomenon possibly caused by the short-circuit fault is effectively avoided, the fault is accurately and quickly isolated, the power supply of a non-fault bus or line is timely recovered, and the power failure influence area of the short-circuit fault tripping is reduced to the maximum extent; and each underground substation and each temporary power distribution point adopt a distributed network protection system, so that excessive dependence on an optical fiber network is avoided, and quick and delay-free transmission of information is ensured.
Furthermore, in the underground substation distributed network protection system and the temporary distribution point distributed network protection system, each switch protector is connected with the network switch through optical fibers or an industrial Ethernet, so that the rapid and delay-free transmission of information is ensured.
Furthermore, the underground substation distributed network protection system is divided into an underground first-level substation distributed network protection system and an underground second-level substation distributed network protection system, and the underground substation distributed network protection system is arranged in a grading mode to correspond to the underground substation graded network protection system, so that the underground substation design and distribution requirements of a mine are met.
Furthermore, the quick-break protection action time limit set values of a first underground incoming line switch protector, a first underground feeder line switch protector and a first underground interconnection switch protector in the underground primary substation distributed network protection system are all 220 ms; the quick-break protection action time limit set values of a second underground incoming line switch protector, a second underground feeder line switch protector and a second underground interconnection switch protector in the underground secondary substation distributed network protection system are all 140ms, and the condition that the switch in a previous stage of substation is tripped cannot be guaranteed when a short-circuit fault occurs.
Furthermore, locking signals among all switch protectors in the underground substation distributed network protection system are transmitted and transmitted by GOOSE messages according to a GOOSE mechanism, when short-circuit faults occur on incoming lines, buses and feeders, fault line sections can be accurately identified, faults are correctly isolated, override tripping of upper-level switches of non-fault line sections in the substation is avoided, the GOOSE mechanism is a rapid message communication mechanism provided by IEC61850, high-speed point-to-point communication is supported, communication delay is less than 4ms, and requirements of real-time performance, reliability and rapidity required by communication protection can be met.
Furthermore, the action time limit of the high-voltage side switch quick-break protection of the temporary power distribution point is set to be 60ms, which is larger than the trip time of the mining quick switch by 30ms, and when the line side of the low-voltage side feed switch has a fault, the feeder switch quickly acts and trips in 0ms time limit, so that the step-over trip of the shifting high-voltage side switch is avoided.
The invention also provides a self-healing control method for the mine power distribution network, which can accurately identify the fault line section and correctly isolate the fault when the short-circuit fault occurs to the incoming line, the bus and the feeder line, thereby avoiding the override trip of the non-fault line section superior switch in the substation, and having reliable action and higher adaptability.
In summary, according to the self-healing control system method for the power distribution network for the mine, the ground substation, the underground first-stage substation and the underground second-stage substation are arranged in a fixed space and cannot move frequently, so that an optical fiber or industrial ethernet communication network is convenient to implement, and for the underground movable power distribution point of a lower stage, along with the change of an operation roadway, the power distribution equipment is frequently moved, the working environment is poor, and the self-healing control system method is a fault frequent region of a mine power supply system; by means of distributed intelligent network protection, five-level difference protection, distributed intelligence of mining boundary switches and a local mine power distribution network mixed fault processing mode, the action is reliable, and the override trip phenomenon possibly caused by short-circuit faults is avoided; the mine power distribution network is divided into four levels, namely a ground substation, an underground first-level substation, an underground second-level substation and a temporary power distribution point, all underground switches adopt mine quick switches, and the sum of time for opening the protection and mechanism action of the mine quick switches is less than 30 ms; the short-circuit protection action time limit of all feeder switches in a ground substation is 300ms, the short-circuit protection action time limit of all switches in a first-level substation is 220ms, the short-circuit protection action time limit of all switches in a second-level substation is 140ms, the short-circuit protection action time limit of a high-voltage side switch protected by a temporary distribution point mobile transformer is set to be 60ms, and the protection action time limit of a lower-level feeder switch of the temporary distribution point mobile transformer is set to be 0 ms; the time limit difference of the short-circuit protection action of the switches of the upper and lower-level substations is less than 30ms of the protection and mechanism action time limit of the mining quick switch, so that the switch in the upper-level substation cannot trip when a short-circuit fault occurs; for the underground primary and secondary substations, because a GOOSE-based protection locking mechanism is adopted, when short-circuit faults occur to an incoming line, a bus and a feeder line, a fault line section can be accurately identified, the fault is correctly isolated, and override tripping of a superior switch of a non-fault line section in the substation can not be caused; the action time limit of the high-voltage side switch rapid-break protection of the temporary distribution point mobile transformer is set to be 60ms, which is larger than the trip time of the mining rapid switch by 30ms, when the line side of the low-voltage side feed switch of the mobile transformer has a fault, the feeder switch rapidly acts to trip within 0ms, and the step-by-step trip of the high-voltage side switch of the mobile transformer cannot be caused.
Drawings
Fig. 1 is a GOOSE-based distributed network protection system according to the present invention;
figure 2 is a typical mine power distribution network of an embodiment.
Detailed Description
In order to make the technical problems, technical solutions and advantageous effects of the present invention more apparent, the following embodiments further describe the present invention in detail. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
As shown in fig. 1, the invention provides a self-healing control system for a mine power distribution network, which comprises a ground substation feeder line protection system, a plurality of underground substation distributed network protection systems and a plurality of temporary distribution point distributed network protection systems, wherein the ground substation feeder line protection system is arranged in a ground substation and is used for performing short-circuit protection on a ground substation feeder line.
The ground substation feeder protection system comprises a feeder switch protector, a feeder short circuit backup protector and a feeder selective grounding protector; the feeder switch protector is arranged in a feeder switch of the ground substation, wherein the short-circuit protection action time limit of the feeder switch protector is 300 ms; the feeder line short circuit backup protector is arranged in a transformer of a ground substation, wherein the minimum action time limit of the feeder line short circuit backup protector is 0.5 s; the feeder line selective grounding protector is independently arranged in a screen group mode, the measuring voltage of the feeder line selective grounding protector is obtained from a ground substation bus voltage transformer, and the measuring current is obtained from a current transformer and a zero sequence current transformer of each feeder line switch of the ground substation.
The distributed network protection systems of the underground substation are respectively and correspondingly arranged at the underground substations, and each distributed network protection system of the underground substation comprises two underground incoming line switch protectors, a plurality of underground feeder switch protectors, an underground connection switch protector and a network switch; the two underground lead-in switch protectors are respectively arranged at lead-in switches of an underground substation, the plurality of underground feeder switch protectors are respectively and correspondingly arranged in feeder switches of the underground substation, and the underground interconnection switch protectors are arranged in interconnection switches of the underground substation; the underground incoming line switch protector, the underground feeder line switch protector and the underground interconnection switch protector are respectively connected with the network switch.
Each underground substation distributed network protection system also comprises an underground substation communication manager, and the network switch and the communication manager are independently arranged in a control box; the output ends of the underground incoming line switch protector, the underground feeder line switch protector and the underground interconnection switch protector are connected with the input end of a network switch through optical fibers or an industrial Ethernet, and the output end of the network switch is connected with the input end of a communication management machine of an underground substation; locking signals among an underground incoming line switch protector, an underground feeder line switch protector and an underground interconnection switch protector in the underground substation distributed network protection system are transmitted and transmitted by adopting GOOSE messages according to a GOOSE mechanism.
In the invention, taking the example that two stages of substations are arranged underground in a mine as an example, the distributed network protection system of the underground substation comprises a distributed network protection system of an underground first-stage substation and a distributed network protection system of an underground second-stage substation.
The underground primary substation distributed network protection system is arranged in an underground primary substation and comprises two first underground incoming line switch protectors, a plurality of first underground feeder line switch protectors, a first underground connection switch protector and a first network switch; the two first underground incoming line switch protectors are respectively arranged at incoming line switches of an underground primary substation, the plurality of first underground feeder line switch protectors are respectively and correspondingly arranged in feeder line switches of the underground primary substation, and the first underground interconnection switch protectors are arranged in interconnection switches of the underground primary substation; the first underground incoming line switch protector, the first underground feeder line switch protector and the first underground interconnection switch protector are respectively connected with the first network switch;
the distributed network protection system of the underground secondary substation is arranged in the underground secondary substation and comprises two second underground incoming line switch protectors, a plurality of second underground feeder line switch protectors, a second underground contact switch protector and a second network switch; two second underground incoming line switch protectors are arranged at incoming line switches of the underground secondary substation respectively, a plurality of second underground feeder switch protectors are correspondingly arranged in feeder switches of the underground secondary substation respectively, the second underground connection switch protectors are arranged in connection switches of the underground secondary substation, and the second underground incoming line switch protectors, the second underground feeder switch protectors and the second underground connection switch protectors are connected with the second network switch respectively.
The short-circuit protection action time limit set values of a first underground incoming line switch protector, a first underground feeder line switch protector and a first underground interconnection switch protector in the underground primary substation distributed network protection system are all 220 ms; and the short-circuit protection action time limit set values of a second underground incoming line switch protector, a second underground feeder switch protector and a second underground interconnection switch protector in the underground secondary substation distributed network protection system are all 140 ms.
The incoming line switch, the feeder line switch and the interconnection switch in the underground substation are all mining fast switches; a high-voltage side switch and a low-voltage side feed switch in the temporary power distribution point are mining fast switches; the sum of the action time limit of the mining quick switch and the short-circuit protection action time limit of the protector is less than 30 ms.
The distributed network protection systems of the plurality of temporary distribution points are respectively and correspondingly arranged at the plurality of underground temporary distribution points, and each distributed network protection system of the temporary distribution points comprises a high-voltage side switch protector, a low-voltage side feed switch protector and a shift transformer network switch; the high-voltage side switch protector is arranged at a high-voltage side switch of the temporary power distribution point, the low-voltage side feed switch protector is arranged at a low-voltage side feed switch of the temporary power distribution point, and the high-voltage side switch protector and the low-voltage side feed switch protector are both connected with the transformer network switch.
Each temporary distribution point distributed network protection system also comprises a temporary distribution point communication manager, and the transformer network switch and the communication manager are independently arranged in a control box; the output ends of the high-voltage side switch protector and the low-voltage side feed switch protector are connected with the input end of the transformer network switch through optical fibers or an industrial Ethernet, and the output end of the transformer network switch is connected with the input end of the temporary power distribution point communication management machine. The short-circuit protection action time limit of the high-voltage side switch protector of the temporary distribution point is 60ms, and the short-circuit protection action time limit of the low-voltage side feed switch protector is 0 ms.
The invention also provides a self-healing control method for the mine power distribution network, which specifically comprises the following steps:
setting the short-circuit protection definite value time limit of all feeder switch protectors of the ground substation to 300 ms; the short-circuit protection action time limit of all protectors in the underground primary substation distributed network protection system is set to be 220ms, the short-circuit protection action time limit of all protectors in the underground secondary substation distributed network protection system is set to be 140ms, the short-circuit protection action time limit of a high-voltage side switch protector of a temporary power distribution point is 60ms, and the short-circuit protection action time limit of a low-voltage side feed switch protector is 0 ms;
in the underground first-level and second-level transformer substations, the interconnection switch is in a brake separating position in a normal operation mode;
when any feeder line in an underground substation has a short-circuit fault, the underground incoming line switch protector and the underground feeder line switch protector detect fault information at the same time, the underground feeder line switch protector sends a tripping locking instruction to the underground incoming line switch protector in the same bus section, the underground incoming line switch protector trips corresponding to the action of the feeder line switch to isolate the fault, and the override tripping of the incoming line switch cannot be caused;
when a half section bus of an underground first-stage or second-stage substation has a fault, an underground incoming line switch protector on a fault bus section detects fault information, the underground incoming line switch protector does not receive a tripping locking instruction, an incoming line switch trips to isolate the fault, meanwhile, a closing locking instruction is sent to an underground interconnection switch protector, and a superior underground substation outgoing line switch connected with the underground incoming line switch protector cannot trip due to time limit difference of 80ms protection;
if a line on the power supply side of a certain inlet switch of an underground substation is in fault, the corresponding underground feeder switch protector of a higher-level substation detects fault information, tripping is carried out through a set time limit protection action, the inlet switch of the line at the fault is in voltage loss and is switched off, meanwhile, a bus section carried by the inlet switch is in voltage loss, and all feeder switches of the bus section are in voltage loss and are switched off; the two incoming line switch protectors of the non-fault bus or line do not send a locking and closing instruction to the interconnection switch protector, the underground interconnection switch protector detects that the voltages on the two sides of the interconnection switch are subjected to single-side voltage loss, the interconnection switch starts closing, and power supply of a voltage loss bus section is recovered; after the interconnection switch is switched on, the interconnection switch protector sends a switching-on instruction to each feeder switch protector, and all corresponding feeder switches which are just subjected to voltage loss switching-off are switched on.
In the invention, a distributed network protection system is adopted by the underground primary and secondary substations, a GOOSE rapid transmission model in IEC61850 standard is used for reference, and a peer-to-peer communication scheme is adopted, so that the underground primary and secondary substations have the advantages of rapid information transmission and no time delay; each switch protector is connected with the GOOSE network switch by adopting optical fibers or industrial Ethernet, and locking signals among the switch protectors are transmitted and transmitted by adopting GOOSE messages according to a GOOSE mechanism.
GOOSE instruction rules
1) There are three instructions for GOOSE networks: and locking tripping, locking closing and closing instructions.
2) All feeder switch intelligent protectors send locking tripping instructions to the incoming line switch intelligent protector of the bus section where the feeder switch intelligent protectors are located after fault information is detected;
3) the two incoming line switch intelligent protectors send locking and closing instructions to the interconnection switch intelligent protector after detecting fault information and not receiving locking tripping instructions sent by the feeder line switch intelligent protector;
4) after the interconnection switch is switched on, the intelligent protector change-over switch is switched to the position of interconnection 1 or interconnection 2, and the fault information is detected to send a locking tripping instruction to the inlet wire switch of interconnection 1 or interconnection 2.
5) And all the switch intelligent protectors do not detect the fault information and send no instruction.
Each switch protector is provided with a three-position selector switch of 'incoming line, feeder line and contact', a two-position selector switch of 'contact 1' or 'contact 2', a locking switching-on element and a locking tripping element are arranged in the switch protector, and a trigger element is arranged in the device and can send locking tripping and switching-on instructions; when the change-over switch is at the 'feeder' position, the switch protector only sends a tripping locking instruction and does not receive a locking tripping and locking closing instruction, the change-over switch receives the tripping locking instruction and sends a closing locking instruction when at the 'wire inlet' position, and the change-over switch receives the tripping locking instruction and the closing locking instruction and sends the tripping locking instruction and the closing instruction when at the 'contact' position.
According to the self-healing control system for the mining power distribution network, the ground transformer substation, the underground first-stage transformer substation and the underground second-stage transformer substation are arranged in a fixed space and cannot move frequently, so that an optical fiber or industrial Ethernet communication network is convenient to implement, and for the lower-stage underground movable power distribution point, the power distribution equipment is frequently moved along with the change of an operation roadway, the working environment is poor, and the self-healing control system is a fault frequent area of a mine power supply system; by means of distributed intelligent network protection, five-level difference protection, distributed intelligence of the mining boundary switch and a local mine power distribution network mixed fault processing mode, the action is reliable, and the override tripping phenomenon possibly caused by short-circuit faults is avoided.
Wherein, the five-level differential protection specifically comprises:
a first stage: in order to reduce the impact of short-circuit current on a system, the minimum overcurrent protection action time limit or the minimum transformer backup overcurrent protection time limit of a ground substation transformer low-voltage side switch, namely a10 kV bus incoming line switch, is only set to be 0.5s, and the minimum overcurrent protection value time limit of a ground substation feeder line switch is set to be 300ms, so that the protection action selectivity can be ensured.
And a second stage: the short-circuit protection action time limit set values of two first underground incoming line switch protectors, first underground feeder line switch protectors and first underground interconnection switch protectors of the underground primary substation are all 220 ms; if a plurality of primary substations exist underground, power supplies are all taken from different bus sections of the ground substation, and short-circuit protection of all switch protectors in all the primary substations is 220ms time limit.
And a third stage: the short-circuit protection action time limit set values of a second underground incoming line switch protector, a second underground feeder line switch protector and a second underground interconnection switch protector in the underground secondary substation distributed network protection system are all 140 ms; therefore, the action time limit of all switches of the underground temporary power distribution point can only be set to be less than 60ms and less than 80ms of time difference, and the selective action of the next-stage power distribution equipment protection cannot be guaranteed by adopting the conventional protection device and the permanent magnet mechanism; if the underground secondary substation adopts a cascade mode by a plurality of substations, and the power supply is taken from different bus sections of the underground primary substation, the short-circuit protection action time limit of all switches in the cascade substation takes 140ms time limit.
Fourth stage: the short-circuit protection action time limit of a high-voltage side switch protector of the temporary power distribution point is 60ms, which is more than 30ms of the tripping time of the mining quick demarcation switch.
And a fifth stage: the short-circuit protection action time limit of the low-voltage side feed switch protector of the temporary distribution point is 0 ms.
The sum of the opening time of a permanent magnetic mechanism switch and the action time limit of a microcomputer protector in the conventional single underground switch is more than 90ms, and the reaction time of a measurement loop is about 10ms to 100 ms.
If all the underground switch protectors adopt the rapid identification protection of the line current slope rapid identification fault signals, the sum of the switch opening time of the permanent magnet mechanism of the underground switch and the action time limit of the rapid identification protector is less than 70ms, compared with the protection of a common microcomputer, the action time limit of the rapid disconnection protection is improved by more than 20ms, and further, if all the underground switches adopt the eddy current driving mechanism and the rapid identification protector, the total action time limit is shortened by more than 60 ms.
In the invention, the underground 3300V, 1140V and 660V feed switches adopt mine quick switches which instantly and quickly disconnect fault current to isolate faults, and the speed of the mine quick switches is far higher than the action speed of a superior switch; the mining quick switch adopts a fault quick recognition technology and an eddy current driving mechanism or a magnetic control mechanism, the sum of the action time limit of the mining quick switch and the action time limit of a protector thereof is less than 30ms, the action time limit is that the opening time of the eddy current driving or magnetic control mechanism is less than 15ms, the action time limit of the quick protector is less than 10ms, and the reaction time of a measurement loop is 5 ms; considering time redundancy, communication transmission and other influencing factors, the protection level difference of each level is set to be 60-80 ms.
Examples
As shown in fig. 2, in this embodiment, a typical mine power distribution network is taken as an example, wherein a1 and B1 are ground substation feeder switches, a primary substation, a secondary substation and a mobile substation in the pit are configured with distributed network protection, and the high-voltage side switches and the low-voltage side feeder switches a10, B10 and B11 of the underground switches a2 to a9, B2 to B9, C1 and C2 and the mining flameproof mobile substations T1, T2, T3 and T4 are all mining fast switches.
When a short-circuit fault occurs at the line side of a feeder switch A5 of an underground primary substation, a ground substation outgoing switch A1, an underground substation incoming switch A2 and a feeder switch A5 detect a fault current, the ground substation outgoing switch A1 quickly breaks protection action time limit for 300ms, the underground substation incoming switch A2 and the feeder switch A5 short-circuit protection action time limit for 220ms, the feeder switch A5 sends a locking tripping signal to the underground substation incoming switch A2, the feeder switch A5 trips for 220ms to isolate the fault, the ground substation outgoing switch A1 and the underground substation incoming switch A2 do not trip, override tripping is avoided, and the fault influence range is expanded.
The short-circuit protection action time limit of all switches A6-A9, B6-B9 and a tie switch C2 of the underground secondary substation is set to 140ms, the short-circuit protection action time limit of high-voltage side switches of mining explosion-proof mobile substations T1, T2, T3 and T4 is set to 60ms, and the short-circuit protection action time limit of low-voltage side feed switches A10, B10 and B11 is set to 0 s.
The mine power distribution network self-healing control system and the method divide the mine power distribution network into four levels, namely a ground transformer substation, an underground primary transformer substation, an underground secondary transformer substation and a temporary power distribution point, all underground switches adopt mine quick switches, and the sum of time for protecting the mine quick switches and time for actuating mechanisms to open the switches is less than 30 ms; the short-circuit protection action time limit of all feeder switches in the ground substation is 300ms, the short-circuit protection action time limit of all switches in the underground primary substation is 220ms, the short-circuit protection action time limit of all switches in the underground secondary substation is 140ms, the short-circuit protection action time limit of a high-voltage side switch protected by the temporary distribution point mobile transformer is 60ms, and the short-circuit protection action time limit of a low-voltage feeder switch of the temporary distribution point mobile transformer is 0 ms; the time limit difference of the short-circuit protection action of the switches of the upper and lower-level substations is less than 30ms of the protection and mechanism action time limit of the mining quick switch, so that the switch in the upper-level substation cannot trip when a short-circuit fault occurs; for underground primary and secondary substations, a GOOSE-based protection locking mechanism is adopted, when short-circuit faults occur to an incoming line, a bus and a feeder line, a fault line section can be accurately identified, the fault is correctly isolated, and override tripping of a superior switch of a non-fault line section in the substation is avoided; the action time limit of the high-voltage side switch rapid-break protection of the temporary distribution point mobile transformer is set to be 60ms, which is larger than the trip time of the mining rapid switch by 30ms, when the line side of the low-voltage side feed switch of the mobile transformer has a fault, the feeder switch rapidly acts to trip within 0ms, and the step-by-step trip of the high-voltage side switch of the mobile transformer cannot be caused.
The switch protectors in the underground first-level or second-level substation distributed network protection system are connected with the network switch through optical fibers or industrial Ethernet, communication transmission is carried out between the switch protectors and the network switch in the same-level substation by utilizing a peer-to-peer communication scheme, and a control communication network is not required to be established between substations of different levels, so that the local distribution function is realized, and the underground first-level or second-level substation distributed network protection system has the advantages of being fast in information transmission and free of time delay.
The locking signals of the switch protectors are transmitted and transferred by GOOSE messages according to a GOOSE mechanism, the GOOSE is a rapid message communication mechanism provided by IEC61850, high-speed point-to-point communication is supported, communication delay is less than 4 milliseconds, and requirements of real-time performance, reliability and rapidity required by communication protection can be met.
The mine power supply network can be divided into four stages of a ground substation, an underground first-stage substation, an underground second-stage substation and a temporary distribution point, all switches and protection devices in the same substation or distribution point are arranged in an integral variable distribution chamber, a distributed network protection system based on a GOOSE locking mechanism is convenient to establish, and the five-stage differential protection can completely avoid the protection of override trip when the underground distribution system has short-circuit fault through fixed value setting; the underground switch adopts a mining quick switch, can instantly and quickly cut off fault current and isolate faults, and has a speed far higher than the action speed of the existing switch; the action time limit and the protection action time limit of the existing permanent magnet mechanism switch mechanism are more than 100ms, in a multi-stage mine power distribution network, because a cable line is short, the time limit cannot be set to avoid the protection action override trip when the short-circuit protection is set, and the mining quick switch and the protection action time limit thereof are less than 30ms, the protection override trip when the short-circuit fault is avoided can be completely set from the protection setting time limit, meanwhile, the shorter the fault removing time of the switch during the short-circuit is, the smaller the damage of the short-circuit fault to system load and equipment and the smaller the system voltage impact are, and the service life of all equipment of the system is prolonged.
The above-described embodiment is only one of the embodiments that can implement the technical solution of the present invention, and the scope of the present invention is not limited by the embodiment, but includes any variations, substitutions and other embodiments that can be easily conceived by those skilled in the art within the technical scope of the present invention disclosed.
Claims (10)
1. A self-healing control system for a mine power distribution network is characterized by comprising a ground substation feeder protection system, a plurality of underground substation distributed network protection systems and a plurality of temporary power distribution point distributed network protection systems; the ground substation feeder protection system is arranged in a ground substation and used for carrying out short-circuit protection on a ground substation feeder;
the distributed network protection systems of the underground substation are respectively and correspondingly arranged at the underground substations, and each distributed network protection system of the underground substation comprises two underground incoming line switch protectors, a plurality of underground feeder switch protectors, an underground connection switch protector and a network switch; the two underground lead-in switch protectors are respectively arranged at lead-in switches of the underground substation, and the plurality of underground feeder switch protectors are respectively and correspondingly arranged in feeder switches of the underground substation; the underground interconnection switch protector is arranged in an interconnection switch of an underground substation; the underground incoming line switch protector, the underground feeder line switch protector and the underground interconnection switch protector are respectively connected with the network switch;
the distributed network protection systems of the plurality of temporary distribution points are respectively and correspondingly arranged at the plurality of underground temporary distribution points, and each distributed network protection system of the temporary distribution points comprises a high-voltage side switch protector, a low-voltage side feed switch protector and a shift transformer network switch; the high-voltage side switch protector is arranged at a high-voltage side switch of the temporary power distribution point, the low-voltage side feed switch protector is arranged at a low-voltage side feed switch of the temporary power distribution point, and the high-voltage side switch protector and the low-voltage side feed switch protector are both connected with the transformer network switch.
2. A mine power distribution network self-healing control system according to claim 1, wherein each underground substation distributed network protection system further comprises an underground substation communication manager; the output ends of the underground incoming line switch protector, the underground feeder line switch protector and the underground interconnection switch protector are respectively connected with the input end of a network switch through optical fibers or an industrial Ethernet, and the output end of the network switch is connected with the input end of a communication management machine of an underground substation.
3. A mine power distribution network self-healing control system according to claim 1, wherein each temporary power distribution point distributed network protection system further includes a temporary power distribution point communication manager; the output ends of the high-voltage side switch protector and the low-voltage side feed switch protector are respectively connected with the input end of the transformer network switch through optical fibers or an industrial Ethernet, and the output end of the transformer network switch is connected with the input end of the temporary power distribution point communication management machine.
4. The mine power distribution network self-healing control system according to claim 1, wherein the underground substation distributed network protection system comprises an underground primary substation distributed network protection system and an underground secondary substation distributed network protection system;
the underground primary substation distributed network protection system is arranged in an underground primary substation and comprises two first underground incoming line switch protectors, a plurality of first underground feeder line switch protectors, a first underground connection switch protector and a first network switch; the two first underground incoming line switch protectors are respectively arranged at incoming line switches of an underground primary substation, the plurality of first underground feeder line switch protectors are respectively and correspondingly arranged in feeder line switches of the underground primary substation, and the first underground interconnection switch protectors are arranged in interconnection switches of the underground primary substation; the first underground incoming line switch protector, the first underground feeder line switch protector and the first underground interconnection switch protector are respectively connected with the first network switch;
the distributed network protection system of the underground secondary substation is arranged in the underground secondary substation and comprises two second underground incoming line switch protectors, a plurality of second underground feeder line switch protectors, a second underground contact switch protector and a second network switch; two second underground incoming line switch protectors are arranged at incoming line switches of the underground secondary substation respectively, a plurality of second underground feeder switch protectors are correspondingly arranged in feeder switches of the underground secondary substation respectively, the second underground connection switch protectors are arranged in connection switches of the underground secondary substation, and the second underground incoming line switch protectors, the second underground feeder switch protectors and the second underground connection switch protectors are connected with the second network switch respectively.
5. The self-healing control system for the mine power distribution network according to claim 4, wherein short-circuit protection action time limit set values of a first underground incoming line switch protector, a first underground feeder line switch protector and a first underground interconnection switch protector in the distributed network protection system of the underground primary substation are all 220 ms;
and the short-circuit protection action time limit set values of a second underground incoming line switch protector, a second underground feeder switch protector and a second underground interconnection switch protector in the underground secondary substation distributed network protection system are all 140 ms.
6. The self-healing control system for the mine power distribution network according to claim 1, wherein the locking signals among the underground incoming line switch protector, the underground feeder switch protector and the underground interconnection switch protector in the distributed network protection system of the underground substation are transmitted and transmitted according to a GOOSE mechanism by using GOOSE messages.
7. The self-healing control system for the mine power distribution network according to claim 1, wherein a mine fast switch is adopted for an incoming switch, a feeder switch and a tie switch in the distributed network protection system of the underground substation; a high-voltage side switch and a low-voltage side feed switch in the temporary power distribution point are mining fast switches; the sum of the action time limit of the mining quick switch and the action time limit of the protector is less than 30 ms.
8. A self-healing control system for the mine power distribution network according to claim 1, wherein the short-circuit protection operation time limit of the high-side switch protector of the temporary power distribution point is 60ms, and the short-circuit protection operation time limit of the low-side feed switch protector is 0 ms.
9. The mine power distribution network self-healing control system according to claim 1, wherein the ground substation feeder protection system includes a feeder switch protector, a feeder short circuit backup protector, and a feeder selective grounding protector; the feeder switch protector is arranged in a feeder switch of a ground substation, wherein the short-circuit protection fixed value time limit of the feeder switch protector is 300 ms; the feeder line short circuit backup protector is arranged in a transformer of a ground substation, wherein the minimum action time limit of the feeder line short circuit backup protector is 0.5 s; the feeder line selective grounding protector is independently arranged in a screen group mode, the measuring voltage of the feeder line selective grounding protector is obtained from a ground substation bus voltage transformer, and the measuring current is obtained from a current transformer and a zero sequence current transformer of each feeder line switch of the ground substation.
10. A self-healing control method for a mine power distribution network, which is characterized in that the self-healing control system for the mine power distribution network according to any one of claims 1 to 9 is used, and specifically comprises the following steps:
in the underground substation, under the normal operation mode, the underground interconnection switch is in the brake separating position;
when any feeder line in an underground substation has a short-circuit fault, the underground incoming line switch protector and the underground feeder line switch protector detect fault information at the same time, and the underground feeder line switch protector sends a tripping locking instruction to the underground incoming line switch protector in the same bus section, and trips corresponding to the action of the feeder line switch to isolate the fault;
when a half-section bus of the underground substation has a fault, the underground incoming line switch protector on the fault bus section detects fault information, the underground incoming line switch protector does not receive a tripping locking instruction, and the incoming line switch trips to isolate the fault; meanwhile, a closing and locking instruction is sent to the underground interconnection switch protector, and the feeder switch of the upper-level underground substation connected with the closing and locking instruction does not generate misoperation tripping due to the time limit difference of protection;
when a line on one power supply side of an inlet switch of an underground substation fails, an underground feeder switch protector of a corresponding upper-level underground substation detects failure information and trips through a set time limit protection action; the inlet switch of the line at the fault is in voltage loss and brake separation, meanwhile, the bus section where the inlet switch is located is in voltage loss, and all feeder switches of the voltage loss bus section are in voltage loss and brake separation; the underground incoming line switch protectors of the non-fault lines do not send locking and closing instructions to the underground contact switch protector, the underground contact switch protector detects that voltage on two sides of the underground contact switch has single-side voltage loss, the underground contact switch starts closing, and power supply of a voltage loss bus section is recovered; after the underground interconnection switch is switched on, the underground interconnection switch protector sends a switching-on instruction to each underground feeder switch protector, and the corresponding under-voltage switching-off feeder switch is switched on.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112886557A (en) * | 2021-04-12 | 2021-06-01 | 广东电网有限责任公司佛山供电局 | Power distribution network main station and level difference protection coordination type self-healing method |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202142845U (en) * | 2011-06-13 | 2012-02-08 | 开封市测控技术有限公司 | Short circuit override tripping locking device |
| US20120265360A1 (en) * | 2011-04-13 | 2012-10-18 | Andre Smit | Method and system for programming and implementing automated fault isolation and restoration using sequential logic |
| CN110932247A (en) * | 2019-12-20 | 2020-03-27 | 陕西南梁矿业有限公司 | Intelligent power supply override trip prevention system and method for mine |
| CN213304974U (en) * | 2020-11-09 | 2021-05-28 | 陕西秦之基智能科技有限公司 | Self-healing control system for mine power distribution network |
-
2020
- 2020-11-09 CN CN202011244450.7A patent/CN112271710A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20120265360A1 (en) * | 2011-04-13 | 2012-10-18 | Andre Smit | Method and system for programming and implementing automated fault isolation and restoration using sequential logic |
| CN202142845U (en) * | 2011-06-13 | 2012-02-08 | 开封市测控技术有限公司 | Short circuit override tripping locking device |
| CN110932247A (en) * | 2019-12-20 | 2020-03-27 | 陕西南梁矿业有限公司 | Intelligent power supply override trip prevention system and method for mine |
| CN213304974U (en) * | 2020-11-09 | 2021-05-28 | 陕西秦之基智能科技有限公司 | Self-healing control system for mine power distribution network |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112886557A (en) * | 2021-04-12 | 2021-06-01 | 广东电网有限责任公司佛山供电局 | Power distribution network main station and level difference protection coordination type self-healing method |
| CN112886557B (en) * | 2021-04-12 | 2022-03-22 | 广东电网有限责任公司佛山供电局 | Power distribution network main station and level difference protection coordination type self-healing method |
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