CN108718087B - Spare power automatic switching system suitable for medium-voltage power supply ring network of rail transit - Google Patents
Spare power automatic switching system suitable for medium-voltage power supply ring network of rail transit Download PDFInfo
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- CN108718087B CN108718087B CN201810695040.0A CN201810695040A CN108718087B CN 108718087 B CN108718087 B CN 108718087B CN 201810695040 A CN201810695040 A CN 201810695040A CN 108718087 B CN108718087 B CN 108718087B
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J3/00—Circuit arrangements for ac mains or ac distribution networks
- H02J3/007—Arrangements for selectively connecting the load or loads to one or several among a plurality of power lines or power sources
- H02J3/0073—Arrangements for selectively connecting the load or loads to one or several among a plurality of power lines or power sources for providing alternative feeding paths between load and source when the main path fails, e.g. transformers, busbars
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J9/00—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting
- H02J9/04—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source
- H02J9/06—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source with automatic change-over, e.g. UPS systems
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Abstract
The invention discloses a spare power automatic switching system suitable for a medium-voltage power supply ring network of rail transit, which comprises a spare power automatic switching system suitable for the medium-voltage power supply ring network of rail transit, and comprises a 32-bit general hardware platform based on ARM, wherein the hardware platform comprises an alternating current plug-in, a CPU plug-in, an outlet plug-in, an input/output plug-in and a power supply plug-in, and is characterized in that the alternating current plug-in: providing access of multiple paths of protection current, measurement current and protection voltage, and respectively protecting and measuring multiple paths; the CPU plug-in unit: the plug-in also provides single mode, multimode fiber interface, electric Ethernet interface and serial port communication in different interface forms, the communication interface mode can be selected and configured, and the GOOSE network can be flexibly established.
Description
Technical Field
The invention relates to an automatic switching system, in particular to a spare power automatic switching system suitable for a medium-voltage power supply ring network in rail transit.
Background
At present, a power supply system of domestic urban rail transit generally adopts a 2-level voltage power supply mode, the whole power supply system is divided into a plurality of power supply sections, each substation in each power supply section adopts a double-loop network power supply mode, and each substation adopts a power supply structure in which single buses are connected in a segmented mode. FIG. 1 shows a 10kV/35kV medium-voltage ring network system for rail transit. The substation mostly adopts the automatic throw-in device of the standby power supply to improve the power supply reliability and the power supply continuity of the system. With the rapid growth of national economy and the rapid development of urban rail transit, the requirements on the selectivity, the rapidity, the sensitivity and the reliability of a protection device are higher and higher when a rail transit ring network power supply system breaks down. At present, the schemes adopted by the conventional bus tie spare power automatic switching device in different cities are different, and the schemes comprise starting automatic switching through an optical fiber longitudinal differential protection action, starting automatic switching through an inlet wire voltage loss protection action, starting automatic switching through bus voltage loss and the like. The schemes all have different problems, although the spare power automatic switching operation time of the optical fiber longitudinal differential protection operation starting automatic switching scheme is short, the spare power automatic switching function can be failed when an optical fiber channel or an optical fiber longitudinal differential protection device fails, and the requirement of protection reliability cannot be met. The action time of the inlet wire no-voltage protection starting automatic switching and the bus no-voltage starting automatic switching needs to be matched through the grade difference of devices between power supply looped network stations, and the condition that two adjacent stations simultaneously carry out automatic switching actions often occurs in a large looped network power supply system due to non-ideal time matching, so that the requirements of protection speed and selectivity cannot be met.
Disclosure of Invention
The technical problem to be solved by the invention is that in a large power supply system of a network, because the time matching is not ideal, the situation that two adjacent spare power automatic switching devices act simultaneously often occurs, and the requirements of protection mobility and selectivity cannot be met.
The invention is realized by the following technical scheme:
the spare power automatic switching system comprises a 32-bit general hardware platform based on ARM, wherein the hardware platform comprises an alternating current plug-in, a CPU plug-in, an outlet plug-in, an input/output plug-in and a power supply plug-in, and the system provides digital rapid spare power automatic switching protection; the communication plug-in unit: providing access of multi-path protection current, measurement current and protection voltage, and respectively providing protection and measuring for the multi-path protection current, the measurement current and the protection voltage; the CPU plug-in unit: the plug-in also provides single mode, multimode fiber interface, electric Ethernet interface and serial port communication in different interface forms, the communication interface mode can be selected and configured, and a GOOSE network can be flexibly established; the outlet insert: providing protection tripping and closing switch-off loops; the opening-in and opening-out plug-in: providing multiple paths of input quantities and output quantities, electrically isolating all input quantities after being connected into the device through an optical coupler, and outputting all output quantities in a relay idle contact mode; the power plug-in: and a multi-path voltage-stabilized power supply is provided to supply power to other plug-in units of the device, and a multi-path input quantity is also provided.
The digital rapid spare power automatic switching protection is provided, a spare power automatic switching starting signal of bus-coupled switches of substations on two adjacent sides and spare power automatic switching starting signals and locking signals of a looped network incoming line switch and an outgoing line switch of a local substation are received through a GOOSE network, and a bus voltage signal of the system is combined to intelligently judge the reason that the bus power loss is caused by looped network line faults or bus faults or breaker failure override tripping, so that selective rapid spare power automatic switching closing is realized.
Optimally, the system software adopts a real-time multitask system and adopts a V L D visual logic development tool, so that the system software has offline logic simulation.
Optimally, a spare power automatic switching starting signal of bus-coupled switches of substations on two adjacent sides and spare power automatic switching starting signals and locking signals of incoming line switches and outgoing line switches of a looped network circuit of the substation are received through a GOOSE network, and bus voltage signals of the system are combined to intelligently judge the reason that bus power loss is caused by looped network circuit faults or bus faults or breaker failure override tripping, so that selective and rapid spare power automatic switching on is realized.
Optimally, when a looped network line breaks down, the optical fiber longitudinal differential protection device or the comprehensive line protection device trips to cause the loss of power of a bus on one side, the bus-coupled spare power automatic switching device receives a starting automatic switching signal sent by the tripping device through a GOOSE network, and the digital rapid spare power automatic switching protection is started immediately by combining the loss of voltage of the bus on one side and the voltage of the bus on the other side of the system to realize rapid power supply of the loss of power bus.
Optimally, when a bus of the system breaks down, the incoming and outgoing line comprehensive line protection device on the side of the bus with the fault trips to cause the power loss of the bus on the side, the bus-coupled spare power automatic switching device receives a locking automatic switching signal sent by the tripping device through a GOOSE network, digital rapid spare power automatic switching protection is locked immediately, meanwhile, a starting automatic switching signal is sent to the bus-coupled spare power automatic switching devices of two adjacent substations through the GOOSE network, and the bus-coupled spare power automatic switching devices of the two adjacent substations are combined with a bus voltage signal of the system to intelligently judge whether the spare power automatic switching acts or not.
Optimally, a circuit breaker failure override trip results in a loss of bus power: when a feed-out line or a looped network outlet line of the system fails and a breaker fails, the inlet line comprehensive line protection device on the fault side realizes override tripping through breaker failure protection, so that a bus on the fault side loses power; the bus tie spare power automatic switching device receives a locking automatic switching signal sent by a tripping device through a GOOSE network, immediately locks digital rapid spare power automatic switching protection, simultaneously sends a starting automatic switching signal to the bus tie spare power automatic switching devices of two adjacent substations through the GOOSE network, and the bus tie spare power automatic switching devices of the two adjacent substations are combined with bus voltage signals of systems of the bus tie spare power automatic switching devices to intelligently judge whether the spare power automatic switching acts or not.
Optimally, GOOSE network communication exception fault handling: the bus power failure spare power automatic switching action logic caused by looped network line faults, bus faults in a station and breaker failure override tripping is under the condition that the GOOSE network communication with a related switch protection system is normal, when the system detects that the GOOSE network communication with the related system is abnormal, the digital rapid spare power automatic switching protection automatically exits, meanwhile, spare power automatic switching backup protection is started, and the spare power automatic switching protection is realized by matching the time of a power supply looped network.
The hardware platform is arranged in a substation, two paths are arranged in the substation, one path is a main line of the substation, the other path is an outlet line, the main line is provided with a bus I, the outgoing line is provided with a bus II, the hardware platform acquires a starting automatic switching input signal, a spare automatic switching charging signal and a locked automatic switching input signal and then carries out logic operation, a logic circuit is divided into two sides, when the bus I is not provided with a voltage and the bus II is provided with a voltage, the logic and operation is carried out together with the collected starting self-switching-in signal, the spare power self-switching-in charging signal, the locked self-switching-in signal and the GOOSE communication normal signal, when the conditions are met, the logic or operation is carried out after the timer TH1, carrying out logical AND operation on the operation result and the inlet wire jump position of the I female ring network while carrying out inlet wire jump action of the I female ring network to form inlet wire jump position side logic of the I female ring network; when the I bus has pressure and the II bus has no pressure, carrying out logic and operation together with the collected starting self-switching-in signal, the spare power self-switching-in charging signal, the locked self-switching-in signal and the GOOSE communication normal signal, and carrying out logic OR operation after a timer TH1 when the conditions are met, and carrying out logic and operation on an operation result and the II bus ring network incoming line jump position while carrying out the II bus ring network incoming line jumping action to form II bus ring network incoming line jump position side logic; and carrying out logical OR operation on the incoming line jumping side logic of the I female ring network and the incoming line jumping side logic of the II female ring network, and combining the bus coupler for automatic switching when a certain side acts.
The invention has the beneficial effects that: the problem of female connection spare power automatic switching protection reliability when looped netowrk line fault not only can be solved, bus fault and the problem of circuit breaker failure override tripping female connection spare power automatic switching protection mobility and selectivity can also be solved, the shortcomings that cables are complicated between conventional secondary protection devices, the cables can not self-check abnormally, debugging and maintenance are troublesome and the like are overcome, intelligent monitoring of secondary circuits between devices is realized, the reliability of control signal transmission is improved, and the operation and maintenance difficulty is reduced. The power supply reliability and the power supply continuity of the ring network power supply system are improved. The technical scheme has good application prospect
Compared with the prior art, the invention has the following advantages and beneficial effects:
1. the invention is suitable for the spare power automatic switching system of the medium-voltage power supply ring network in the rail transit, improves the reliability of control signal transmission and reduces the operation and maintenance difficulty;
2. the invention is suitable for the spare power automatic switching system of the medium-voltage power supply ring network in the rail transit, and improves the power supply reliability and power supply continuity of the ring network power supply system;
drawings
The accompanying drawings, which are included to provide a further understanding of the embodiments of the invention and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the invention and together with the description serve to explain the principles of the invention. In the drawings:
fig. 1 is a medium-voltage ring network structure of urban rail transit.
Fig. 2 is a logic diagram of the operation of the digital fast backup power automatic switching device of the present invention.
FIG. 3 illustrates a normal operating mode, a typical point of failure example.
Fig. 4 illustrates an abnormal operation mode (i), a typical failure point, in the second embodiment of the present invention.
Fig. 5 illustrates an abnormal operation mode (i) in the second embodiment of the present invention, which is a typical fault point example.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail below with reference to examples and accompanying drawings, and the exemplary embodiments and descriptions thereof are only used for explaining the present invention and are not meant to limit the present invention.
Example one
As shown in figures 1-3, in the implementation of the system scheme, a new-generation 32-bit ARM-based general hardware platform is adopted in the digital bus-tie automatic switching system applicable to the medium-voltage power supply ring network in the embodiment, and a protection and MMI display integrated structure is adopted, system hardware comprises an alternating current plug-in unit, a CPU plug-in unit, an outlet plug-in unit, an input/output plug-in unit and a power supply plug-in unit, the alternating current plug-in unit can provide access of multiple paths of protection current, measurement current and protection voltage for protection and measurement respectively, the CPU plug-in unit receives alternating current sampling data and various remote signaling information to realize complex data operation and logic processing, so that various events can be responded quickly, the plug-in units also provide an optical fiber interface, an Ethernet interface and serial communication, the communication interface mode is flexibly configured, a GOOSE network can be flexibly established, the input/output plug-in unit provides multiple paths of input and output, all input/output amounts are electrically isolated through optical couplers, all output amounts are output in a relay empty contact mode, the outlet plug-in/output circuit provides protection trip and switch-in/output loops, the power supply to other devices, and the high-loss fault-free-time simulation system can be realized, and the reliability of a high-safety and high-reliability simulation system adopts a high-reliability and independent software, and a high-reliability and high-reliability simulation system can be realized by adopting a L.
The digital rapid bus tie spare power automatic switching protection function is realized: the ring network line fault causes the bus to lose power: when a looped network line fails, the optical fiber longitudinal differential protection device or the comprehensive line protection device trips to cause the loss of power of a bus on one side, the bus-tie backup automatic switching device receives a starting automatic switching signal sent by the tripping device through a GOOSE network, and the digital rapid backup automatic switching protection is started immediately by combining the loss of voltage of the bus on one side and the voltage of the bus on the other side of the system to realize rapid power supply of the loss of power bus.
As shown in fig. 2, the logic operation is divided into two sides, one side is that when the I bus is not pressurized and the II bus is pressurized, logic and operation is normally performed along with the start of the self-switching in, the backup self-switching charging and the locking of the self-switching in and the GOOSE communication, when the above conditions are satisfied, logic or operation is performed after a timer TH1, and when the I bus ring network incoming line tripping operation is performed, the operation result and the I bus ring network incoming line tripping position are logically and operated to form an I bus ring network incoming line tripping side logic; when the I bus has pressure and the II bus has no pressure, the logic and operation are normally carried out together with the start of the self-throw-in, the spare power self-throw charging and the locked self-throw-in and the GOOSE communication when the conditions are met, the logic or operation is carried out after a timer TH1, and the logic and operation is carried out on the operation result and the inlet wire jump position of the II bus ring network while the inlet wire action of the II bus ring network is carried out, so that the inlet wire jump position side logic of the II bus ring network is formed; and carrying out logical OR operation on the incoming line jumping side logic of the I female ring network and the incoming line jumping side logic of the II female ring network, and combining the bus coupler for automatic switching when a certain side acts.
The internal bus fault causes the bus to lose power: when the bus of the system breaks down, the incoming and outgoing line comprehensive line protection device on the side of the bus with the fault trips to cause the bus on the side to lose power, the bus-coupled spare power automatic switching device receives a locking automatic switching signal sent by the tripping device through a GOOSE network, digital rapid spare power automatic switching protection is locked immediately, meanwhile, a starting automatic switching signal is sent to the bus-coupled spare power automatic switching devices of two adjacent substations through the GOOSE network, and the bus-coupled spare power automatic switching devices of the two adjacent substations are combined with bus voltage signals of the system to intelligently judge whether the spare power automatic switching acts or not.
The circuit breaker fails and trips more frequently to cause the loss of power of a bus: when a feed-out line or a looped network outlet line of the system fails and a breaker fails, the inlet line comprehensive line protection device on the fault side realizes override tripping through breaker failure protection, so that a bus on the fault side loses power; the bus tie spare power automatic switching device receives a locking automatic switching signal sent by a tripping device through a GOOSE network, immediately locks digital rapid spare power automatic switching protection, simultaneously sends a starting automatic switching signal to the bus tie spare power automatic switching devices of two adjacent substations through the GOOSE network, and the bus tie spare power automatic switching devices of the two adjacent substations are combined with bus voltage signals of systems of the bus tie spare power automatic switching devices to intelligently judge whether the spare power automatic switching acts or not. The action principle of the backup power automatic switching protection is shown in a digital rapid backup power automatic switching protection schematic diagram in an attached figure 2.
GOOSE network communication exception fault handling: the bus power failure spare power automatic switching action logic caused by ring network line faults, bus faults and breaker failure override tripping is under the condition that the GOOSE network communication with the related switch protection system is normal, and when the system detects that the GOOSE network communication with the related system is abnormal, the digital rapid spare power automatic switching protection automatically exits. And meanwhile, backup protection of the spare power automatic switching is started, and the spare power automatic switching protection is realized through time coordination. The backup protection operation principle of the backup automatic switching device is shown as a backup principle diagram of the backup automatic switching device in fig. 2.
Example two
As shown in fig. 3 to 5, in the present embodiment, on the basis of the first embodiment, typical faults are analyzed, and a in the following table, i.e., a, optical difference trip signals are given in a normal operation mode (bus tie separation and looped network interconnection switch separation); b, automatically throwing a GOOSE signal; c, locking the automatic switching GOOSE signal or the bus protection and breaker failure protection action signal of the body; d, one section of the bus has pressure and the other section has no pressure;
① cable fault of ring network between two stations (K1), and normal optical fiber differential protection
② cable fault of the ring network between two stations (K1), and fiber channel fault, GOOSE channel between stations is normal
③, Bst I # bus fault (K2)
④ and Bst II # bus fault (K3)
⑤ failure of feed-out line (K4)
⑥, failure of the feed-out line (K4), failure of the feed-out line breaker, and skip of the superior switch
⑦, cable fault of two-station ring network (K1), failure of outlet circuit breaker, and skip of higher switch
Abnormal operation mode one (mother combination in on position) (see figure 4)
① cable fault of ring network between two stations (K1), and normal optical fiber differential protection
② cable fault of the ring network between two stations (K1), and fiber channel fault, GOOSE channel between stations is normal
③, Bst I # bus fault (K2)
④ and Bst II # bus fault (K3)
⑤ failure of feed-out line (K4)
⑥, failure of the feed-out line (K4), failure of the feed-out line breaker, and skip of the superior switch
⑦, cable fault of two-station ring network (K1), failure of outlet circuit breaker, and skip of higher switch
Abnormal operation mode two (ring network connection switch in closed position) (see figure 5)
① cable fault of ring network between two stations (K1), and normal optical fiber differential protection
② cable fault of the ring network between two stations (K1), and fiber channel fault, GOOSE channel between stations is normal
③, Bst I # bus fault (K2)
④ and Bst II # bus fault (K3)
⑤ failure of feed-out line (K4)
⑥, failure of the feed-out line (K4), failure of the feed-out line breaker, and skip of the superior switch
⑦, cable fault of two-station ring network (K5), failure of outlet circuit breaker, and skip of higher switch
The above-mentioned embodiments are intended to illustrate the objects, technical solutions and advantages of the present invention in further detail, and it should be understood that the above-mentioned embodiments are merely exemplary embodiments of the present invention, and are not intended to limit the scope of the present invention, and any modifications, equivalent substitutions, improvements and the like made within the spirit and principle of the present invention should be included in the scope of the present invention.
Claims (7)
1. The spare power automatic switching system suitable for the medium-voltage power supply ring network in the rail transit comprises a 32-bit general hardware platform based on ARM, wherein the hardware platform comprises an alternating current plug-in, a CPU plug-in, an outlet plug-in, an input and output plug-in and a power supply plug-in;
the communication plug-in unit: providing access of multi-path protection current, measurement current and protection voltage, and respectively providing protection and measuring for the multi-path protection current, the measurement current and the protection voltage;
the CPU plug-in unit: the plug-in also provides single mode, multimode fiber interface, electric Ethernet interface and serial port communication in different interface forms, the communication interface mode can be selected and configured, and a GOOSE network can be flexibly established;
the outlet insert: providing protection tripping and closing switch-off loops;
the opening-in and opening-out plug-in: providing multiple paths of input quantities and output quantities, electrically isolating all input quantities after being connected into the device through an optical coupler, and outputting all output quantities in a relay idle contact mode;
the power plug-in: providing a multi-path voltage-stabilized power supply to supply power to other plug-ins of the device and also providing multi-path input quantity;
the hardware platform is arranged in a substation, two paths are arranged in the substation, one path is a main line of the substation, the other path is an outlet line, the main line is provided with a bus I, the outgoing line is provided with a bus II, the hardware platform acquires a starting automatic switching input signal, a spare automatic switching charging signal and a locked automatic switching input signal and then carries out logic operation, a logic circuit is divided into two sides, when the bus I is not provided with a voltage and the bus II is provided with a voltage, the logic and operation is carried out together with the collected starting self-switching-in signal, the spare power self-switching-in charging signal, the locked self-switching-in signal and the GOOSE communication normal signal, when the conditions are met, the logic or operation is carried out after the timer TH1, carrying out logical AND operation on the operation result and the inlet wire jump position of the I female ring network while carrying out inlet wire jump action of the I female ring network to form inlet wire jump position side logic of the I female ring network; when the I bus has pressure and the II bus has no pressure, carrying out logic and operation together with the collected starting self-switching-in signal, the spare power self-switching-in charging signal, the locked self-switching-in signal and the GOOSE communication normal signal, and carrying out logic OR operation after a timer TH1 when the conditions are met, and carrying out logic and operation on an operation result and the II bus ring network incoming line jump position while carrying out the II bus ring network incoming line jumping action to form II bus ring network incoming line jump position side logic; and carrying out logical OR operation on the incoming line jumping side logic of the I female ring network and the incoming line jumping side logic of the II female ring network, and combining the bus coupler for automatic switching when a certain side acts.
2. The automatic backup power switching system applicable to the medium voltage power supply ring network in the rail transit as claimed in claim 1, wherein the system software adopts a real-time multitask system, and adopts a V L D visual logic development tool to enable the system software to have offline logic simulation.
3. The automatic backup power switching system applicable to the medium-voltage power supply ring network of the rail transit as claimed in claim 1, wherein a backup power switching start signal of a bus tie switch of a substation on two adjacent sides and a backup power switching start signal and a blocking signal of an incoming line switch and an outgoing line switch of a ring network line of the substation are received through a GOOSE network, and a bus voltage signal of the system is combined to intelligently judge whether a bus power loss is a fault of the ring network line or a bus fault or a reason caused by a fault override trip of a breaker, so that selective and rapid automatic backup power switching closing is realized.
4. The automatic backup power switching system suitable for the medium voltage power supply looped network of the rail transit as claimed in claim 3, wherein when a looped network line has a fault, the optical longitudinal differential protection device or the integrated circuit protection device trips to cause the power loss of the bus at one side of the bus, the automatic backup power switching device of the bus coupling receives a starting automatic switching signal sent by the tripping device through the GOOSE network, and the digital rapid automatic backup power switching protection is immediately started in combination with the voltage loss of the bus at one side and the voltage of the bus at the other side of the system, so as to realize rapid power supply of the power loss bus.
5. The automatic backup power switching system suitable for the medium voltage power supply ring network of the rail transit as claimed in claim 3, wherein when the bus of the system has a fault, the integrated circuit protection device of the incoming and outgoing lines at the side of the bus with the fault trips to cause the power loss of the bus at the side of the bus, the automatic backup power switching device of the bus coupling receives the locking automatic switching signal sent by the tripping device through the GOOSE network, immediately locks the digital rapid automatic backup power switching protection, and sends a starting automatic switching signal to the automatic backup power switching devices of the bus couplings of two adjacent substations through the GOOSE network.
6. The automatic backup power switching system suitable for the rail transit medium voltage power supply ring network according to claim 3, characterized in that the breaker failure override trip causes the bus to lose power: when a feed-out line or a looped network outlet line of the system fails and a breaker fails, the inlet line comprehensive line protection device on the fault side realizes override tripping through breaker failure protection, so that a bus on the fault side loses power; the bus tie spare power automatic switching device receives a locking automatic switching signal sent by a tripping device through a GOOSE network, immediately locks digital rapid spare power automatic switching protection, and simultaneously sends a starting automatic switching signal to the bus tie spare power automatic switching devices of two adjacent substations through the GOOSE network.
7. The digital bus tie spare power automatic switching system applicable to the medium-voltage power supply ring network in the rail transit according to any one of claims 4 to 6 is characterized in that GOOSE network communication abnormal fault processing: the bus power failure spare power automatic switching action logic caused by looped network line faults, bus faults in a station and breaker failure override tripping is under the condition that the GOOSE network communication with a related switch protection system is normal, when the system detects that the GOOSE network communication with the related system is abnormal, the digital rapid spare power automatic switching protection automatically exits, meanwhile, spare power automatic switching backup protection is started, and the spare power automatic switching protection is realized by matching the time of a power supply looped network.
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| CN112350309B (en) * | 2020-10-29 | 2022-06-07 | 中铁第四勘察设计院集团有限公司 | Self-healing power supply system for urban rail transit |
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| CN103560585B (en) * | 2013-11-07 | 2015-06-10 | 南京国电南自轨道交通工程有限公司 | Digitized line protection measurement and control system suitable for metro industry |
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