CN117543817A - Distributed power distribution protection control system for common bus structure - Google Patents
Distributed power distribution protection control system for common bus structure Download PDFInfo
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- CN117543817A CN117543817A CN202311497442.7A CN202311497442A CN117543817A CN 117543817 A CN117543817 A CN 117543817A CN 202311497442 A CN202311497442 A CN 202311497442A CN 117543817 A CN117543817 A CN 117543817A
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- 238000004891 communication Methods 0.000 claims abstract description 25
- 238000000034 method Methods 0.000 claims abstract description 22
- 230000008569 process Effects 0.000 claims abstract description 18
- 239000013307 optical fiber Substances 0.000 claims abstract description 15
- 230000005540 biological transmission Effects 0.000 claims abstract description 6
- 230000007246 mechanism Effects 0.000 claims description 13
- 238000013500 data storage Methods 0.000 claims description 7
- 239000000835 fiber Substances 0.000 claims description 7
- 239000000523 sample Substances 0.000 claims description 7
- 238000005070 sampling Methods 0.000 claims description 4
- 230000001133 acceleration Effects 0.000 claims description 3
- 238000012545 processing Methods 0.000 description 10
- 238000012423 maintenance Methods 0.000 description 8
- 239000000306 component Substances 0.000 description 5
- 238000009434 installation Methods 0.000 description 5
- 238000001914 filtration Methods 0.000 description 4
- 230000017525 heat dissipation Effects 0.000 description 4
- 238000012544 monitoring process Methods 0.000 description 4
- 239000008358 core component Substances 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000000087 stabilizing effect Effects 0.000 description 2
- 230000002159 abnormal effect Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000004364 calculation method Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 230000002452 interceptive effect Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
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- 230000035699 permeability Effects 0.000 description 1
Classifications
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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
- H02J13/00—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network
- H02J13/00006—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network characterised by information or instructions transport means between the monitoring, controlling or managing units and monitored, controlled or operated power network element or electrical equipment
- H02J13/00016—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network characterised by information or instructions transport means between the monitoring, controlling or managing units and monitored, controlled or operated power network element or electrical equipment using a wired telecommunication network or a data transmission bus
- H02J13/00017—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network characterised by information or instructions transport means between the monitoring, controlling or managing units and monitored, controlled or operated power network element or electrical equipment using a wired telecommunication network or a data transmission bus using optical fiber
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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
- H02J13/00—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network
- H02J13/00032—Systems characterised by the controlled or operated power network elements or equipment, the power network elements or equipment not otherwise provided for
- H02J13/00036—Systems characterised by the controlled or operated power network elements or equipment, the power network elements or equipment not otherwise provided for the elements or equipment being or involving switches, relays or circuit breakers
- H02J13/0004—Systems characterised by the controlled or operated power network elements or equipment, the power network elements or equipment not otherwise provided for the elements or equipment being or involving switches, relays or circuit breakers involved in a protection system
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Computer Networks & Wireless Communication (AREA)
- Remote Monitoring And Control Of Power-Distribution Networks (AREA)
Abstract
The application relates to a distributed power distribution protection control system for a common bus structure, which comprises a protection device and a plurality of interval control protection terminals; each incoming line interval and each outgoing line interval under the same bus are provided with an interval control terminal; each interval control and protection terminal is used for collecting voltage alternating current analog quantity, current alternating current analog quantity, arc light analog quantity and switching value of the interval where the interval control and protection terminal is located, uploading the voltage alternating current analog quantity, the current alternating current analog quantity, the arc light analog quantity and the switching value to the protection device, and controlling opening and closing of a breaker and a disconnecting link of the interval where the interval control and protection terminal is located according to an operation command of the protection device; the protection device is used for outputting corresponding operation commands to each interval control terminal according to the voltage alternating current analog quantity, the current alternating current analog quantity, the arc light analog quantity and the switching value which are sent by each interval control terminal and the preset protection logic; and the special optical fiber of the process layer is used as a communication medium between the protection device and each interval control protection terminal, and a special protocol is adopted to realize high-speed data transmission and realize plug-and-play configuration-free.
Description
Technical Field
The application relates to the technical field of cables, in particular to a distributed power distribution protection control system for a common bus structure.
Background
With more and more distributed power supplies with high permeability being connected into a power distribution network and the requirements of users on power supply reliability, power quality, service level and the like being improved, protection control of the power distribution network is increasingly emphasized, and an on-off station serving as a power collection and distribution node in the power distribution network and an on-off line interval on a bus of a power distribution room are generally only provided with interval protection, so that the bus protection and station domain protection are absent, a protection control system does not form an organic whole, protection setting cooperation is complex, limitation and deficiency exist in the aspects of reliability, flexibility and maintenance cost, and the power distribution network is difficult to adapt to a multi-source complex modern power distribution network.
On the other hand, although the functions of the traditional centralized power distribution protection device are highly integrated, the space for installing the screen cabinet is greatly saved, the problems that the number of secondary cables is large, the cost is high, the maintenance difficulty is high, the centralized protection device is large in size, the installation is inconvenient, the power consumption is high, the heat dissipation is difficult and the like exist because the signals such as the analog quantity, the switching quantity and the control quantity in each interval in a power distribution room are wired to the protection screen cabinet.
Disclosure of Invention
The application aims at providing a distributed power distribution protection control system for a common bus structure so as to reduce operation and maintenance technical difficulty and workload.
The embodiment of the application provides a distributed power distribution protection control system for a common bus structure, which comprises a protection device and a plurality of interval control protection terminals; each incoming line interval and each outgoing line interval under the same bus are provided with an interval control terminal;
each interval control and protection terminal is used for collecting voltage alternating current analog quantity, current alternating current analog quantity, arc light analog quantity and switching value of an interval where the interval control and protection terminal is located, uploading the voltage alternating current analog quantity, the current alternating current analog quantity, the arc light analog quantity and the switching value to the protection device, and controlling opening and closing of a breaker and a disconnecting link of the interval where the interval control and protection terminal is located according to an operation command of the protection device;
the protection device is used for outputting corresponding operation commands to each interval control terminal according to the voltage alternating current analog quantity, the current alternating current analog quantity, the arc light analog quantity and the switching value which are sent by each interval control terminal and the preset protection logic;
and a special optical fiber of a process layer is used as a communication medium between the protection device and each interval control protection terminal, and a special protocol is adopted to realize high-speed data transmission and realize plug-and-play configuration-free.
Further, each interval control terminal is allocated with a unique interval short address number;
each interval control and protection terminal is specifically used for generating a special protocol message by using a voltage alternating current analog quantity, a current alternating current analog quantity, an arc light analog quantity and a switching value of an interval where the interval control and protection terminal is located and an interval short address number allocated to the interval control and protection terminal, and transmitting the special protocol message to the protection device through a process layer fiber channel by using a point-to-point special protocol.
Further, the protection device is specifically configured to receive, through a dedicated port, a dedicated protocol packet sent by each interval control protection terminal, parse the received dedicated protocol packet to obtain a corresponding voltage ac analog quantity, a current ac analog quantity, an arc light analog quantity, a switching value, and an interval short address number, and buffer the received voltage ac analog quantity, current ac analog quantity, arc light analog quantity, and switching value to a collected data storage area corresponding to the interval after checking the interval short address number with a short address number of an incoming line interval or an outgoing line interval corresponding to the dedicated port.
Furthermore, the protection device is specifically further configured to perform interpolation synchronization on the sampling time by using a lagrangian interpolation method on the data in the collected data storage area, and then process the data after the interpolation synchronization according to a preset protection logic to output a corresponding operation command to each interval control protection terminal.
Further, the protection device is used for bus protection, line longitudinal current differential protection, line network topology protection, distributed arc light protection and area self-healing control, and each interval is configured with overcurrent protection, zero sequence overcurrent protection, overcurrent acceleration protection, failure protection and reclosing.
Further, the interval control protection terminals are arranged on the switch cabinets or ring main units at the corresponding intervals, the interval control protection terminals are connected with intervals PT, intervals CT, arc probes, a breaker operating mechanism and a disconnecting link operating mechanism, the intervals CT are used for collecting interval current alternating current analog quantities, the intervals PT are used for collecting interval voltage alternating current analog quantities, the arc probes are used for collecting arc light analog quantities of a bus room, a switch room and a cable room in the cabinet, and the breaker operating mechanism is used for collecting switching quantities of the breaker at intervals and controlling opening and closing of the breaker; the disconnecting link operating mechanism is used for collecting the switching value of the disconnecting link at intervals and controlling the opening and closing of the disconnecting link.
The embodiment of the application has the following beneficial effects:
the special optical fiber is used as a communication medium between the protection device and the interval control protection terminal, and the optical fiber is used for replacing a large number of cables, so that the problems of large size, inconvenience in installation, high power consumption, difficulty in heat dissipation and the like of the traditional centralized power distribution protection device are solved, complex secondary wiring of a power distribution station room is reduced, shi Gongyun-dimensional workload and cost are reduced, and economical efficiency and reliability are enhanced; the distributed architecture replaces the current interval protection distributed configuration, the data of the whole power distribution station house can be gathered, the rapid and regional protection functions of bus protection, station domain protection and the like are increased, the engineering configuration and the fixed value and time limit cooperation among protection devices are simplified, and the operation and maintenance technical difficulty and workload are reduced.
Additional features and advantages of embodiments of the present application will be set forth in the description which follows.
Drawings
In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described below, it being obvious that the drawings in the following description are only some embodiments of the present application, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
Fig. 1 is a schematic circuit diagram of a distributed power distribution protection control system for a common bus structure according to an embodiment of the present application.
Fig. 2 is a schematic circuit structure diagram of a distributed power distribution protection control system of a 10kV power distribution room in an embodiment of the application.
Detailed Description
Various exemplary embodiments, features and aspects of the present application will be described in detail below with reference to the accompanying drawings. In the drawings, like reference numbers indicate identical or functionally similar elements. Although various aspects of the embodiments are illustrated in the accompanying drawings, the drawings are not necessarily drawn to scale unless specifically indicated. In addition, numerous specific details are set forth in the following examples in order to provide a better understanding of the present application. It will be understood by those skilled in the art that the present application may be practiced without some of these specific details. In some instances, well known means to those skilled in the art have not been described in detail in order to not obscure the subject matter of the present application.
Referring to fig. 1, an embodiment of the present application proposes a distributed power distribution protection control system for a common bus structure, including a protection device and a plurality of interval control protection terminals; each incoming line interval and each outgoing line interval under the same bus (a main power transmission line in the power system) are provided with an interval control and protection terminal;
each interval control and protection terminal is used for collecting voltage alternating current analog quantity, current alternating current analog quantity, arc light analog quantity and switching value of an interval where the interval control and protection terminal is located, uploading the voltage alternating current analog quantity, the current alternating current analog quantity, the arc light analog quantity and the switching value to the protection device, and controlling opening and closing of a breaker and a disconnecting link of the interval where the interval control and protection terminal is located according to an operation command of the protection device;
the protection device is used for outputting corresponding operation commands to each interval control terminal according to the voltage alternating current analog quantity, the current alternating current analog quantity, the arc light analog quantity and the switching value which are sent by each interval control terminal and the preset protection logic;
and a special optical fiber of a process layer is used as a communication medium between the protection device and each interval control protection terminal, and a special protocol is adopted to realize high-speed data transmission and realize plug-and-play configuration-free. The communication mode has the characteristics of plug and play, which means that when the interval control and protection terminal is added or removed in the system, the complex configuration process is not needed, the system can automatically identify and connect the newly added terminal, thereby realizing rapid expansion and maintenance, and the design makes the system installation and maintenance simpler and more convenient.
Further, each interval control terminal is allocated with a unique interval short address number;
each interval control and protection terminal is specifically used for generating a special protocol message by using a voltage alternating current analog quantity, a current alternating current analog quantity, an arc light analog quantity and a switching value of an interval where the interval control and protection terminal is located and an interval short address number allocated to the interval control and protection terminal, and transmitting the special protocol message to the protection device through a process layer fiber channel by using a point-to-point special protocol.
In particular, a point-to-point dedicated protocol refers to a specific protocol that is used only for communication between two nodes, and in network communication, point-to-point communication refers to directly establishing a connection between two nodes and exchanging data without passing through other intermediate nodes, where the point-to-point dedicated protocol is generally designed to meet specific application or system requirements, and is more effective and efficient for specific data exchange and communication requirements.
Further, the protection device is specifically configured to receive, through a dedicated port, a dedicated protocol packet sent by each interval control protection terminal, parse the received dedicated protocol packet to obtain a corresponding voltage ac analog quantity, a current ac analog quantity, an arc light analog quantity, a switching value, and an interval short address number, and buffer the received voltage ac analog quantity, current ac analog quantity, arc light analog quantity, and switching value to a collected data storage area corresponding to the interval after checking the interval short address number with a short address number of an incoming line interval or an outgoing line interval corresponding to the dedicated port.
Furthermore, the protection device is specifically further configured to perform interpolation synchronization on the sampling time by using a lagrangian interpolation method on the data in the collected data storage area, and then process the data after the interpolation synchronization according to a preset protection logic to output a corresponding operation command to each interval control protection terminal.
Further, the protection device comprises, but is not limited to, bus protection, line longitudinal current differential protection, line network topology protection, distributed arc protection and area self-healing control, and each interval is configured with overcurrent protection, zero sequence overcurrent protection, overcurrent acceleration protection, failure protection and reclosing.
Further, the interval control protection terminals are arranged on the switch cabinets or ring main units at the corresponding intervals, the interval control protection terminals are connected with intervals PT, intervals CT, arc probes, a breaker operating mechanism and a disconnecting link operating mechanism, the intervals CT are used for collecting interval current alternating current analog quantities, the intervals PT are used for collecting interval voltage alternating current analog quantities, the arc probes are used for collecting arc light analog quantities of a bus room, a switch room and a cable room in the cabinet, and the breaker operating mechanism is used for collecting switching quantities of the breaker at intervals and controlling opening and closing of the breaker; the disconnecting link operating mechanism is used for collecting the switching value of the disconnecting link at intervals and controlling the opening and closing of the disconnecting link.
Further, the protection device is arranged in the PT cabinet or the protection screen cabinet, and the connecting bus PT acquires bus voltage and acquires and processes other public signals in the power distribution station room. The protection device comprises a CPU plug-in, a signal processing plug-in, an analog input plug-in, a switching value input plug-in, a man-machine interface and a device power plug-in, wherein the signal processing plug-in provides an 8-path process layer Ethernet optical fiber communication interface, and is connected with each interval control protection terminal in the bus through a special optical fiber.
Specifically, the technical functions/principles of the respective functional components of the protection device are as follows:
CPU plug-in: the CPU plug-in is a core component of the protection device and is responsible for processing and controlling the operation of the whole protection device; the method comprises the steps of executing various protection algorithms and logics, monitoring the state of a power grid, judging faults and abnormal conditions, and taking corresponding protection measures;
analog input plug-in: the analog input plug-in is used for receiving and processing analog input signals from each interval control protection terminal; it can receive and process various analog signals, such as current, voltage, temperature, etc., for protection and monitoring;
switching value input plug-in components: the switching value input plug-in is used for receiving and processing switching value input signals from each interval control protection terminal; it can receive and process various switching value signals, such as breaker state, switch position, etc., for protection and control;
a signal processing plug-in: the signal processing plug-in is responsible for receiving and processing data from the analog input plug-in and the switching value input plug-in; the data are converted into digital signals, and the digital signals are subjected to filtering, amplifying, correcting and the like so as to facilitate the subsequent protection algorithm and logic analysis of the CPU plug-in;
human-machine interface: the man-machine interface is an interactive interface between the protection device and an operator; the system provides the functions of operating and monitoring the protection device, including parameter setting, fault display, alarm prompt and the like; the human-computer interface is usually a touch screen or keyboard display, so that an operator can conveniently interact with the protection device;
device power plug-in: the device power plug-in provides power supply for the protection device; the input power supply is responsible for filtering, stabilizing and isolating so as to ensure the normal operation and stability of the protection device;
the components work together to realize the functions of the protection device, including fault detection, fault positioning, fault removal and the like, so as to protect the safe and stable operation of the power system.
Further, the interval control protection terminal comprises a CPU, a communication module, an analog input module, a switching value input module, an operation loop, a relay outlet module and a device power supply, and adopts a whole stacked and laminated interconnection structure, and the communication module provides a 1-path process layer Ethernet optical fiber communication interface for high-speed and real-time communication between the interval control protection terminal and a protection device.
Specifically, the technical functions/principles of each functional component of the interval control terminal are as follows:
CPU: the CPU of the interval control terminal is a core component and is responsible for processing and controlling the operation of the whole terminal; it executes the operation command of the protection device;
and a communication module: the communication module is responsible for communicating with other devices, including data exchange with the superior protection device; the data transmission and sharing can be realized through various communication protocols and interfaces so as to realize remote monitoring and control;
analog input module: the analog input module is used for receiving analog input signals such as current, voltage and the like;
the switching value input module is used for: the switching value input module is used for receiving switching value input signals such as breaker states, switch positions and the like;
operating circuit and relay outlet module: the operating loop and relay outlet module is responsible for controlling and operating equipment of the power system, such as a circuit breaker, a grounding switch and the like; the control signal from the CPU is received, and the operation and control of the equipment are realized through output equipment such as a relay and the like;
device power: the device power supply provides power supply for the terminal equipment; the power supply is responsible for filtering, stabilizing and isolating an input power supply so as to ensure the normal operation and stability of terminal equipment;
the components work together to realize the functions of the interval control terminal, including data acquisition, protection control, communication interaction and the like, so as to protect the safe and stable operation of the power system.
The special optical fiber is used as a communication medium between the protection device and the interval control protection terminal, and the optical fiber is used for replacing a large number of cables, so that the problems of large size, inconvenience in installation, high power consumption, difficulty in heat dissipation and the like of the traditional centralized power distribution protection device are solved, complex secondary wiring of a power distribution station room is reduced, shi Gongyun-dimensional workload and cost are reduced, and economical efficiency and reliability are enhanced; the distributed architecture replaces the current interval protection distributed configuration, the data of the whole power distribution station house can be gathered, the rapid and regional protection functions of bus protection, station domain protection and the like are increased, the engineering configuration and the fixed value and time limit cooperation among protection devices are simplified, and the operation and maintenance technical difficulty and workload are reduced.
Taking one of the power distribution rooms of a 10kV dual-power single-ring network as an example in fig. 2 for describing the embodiment in detail, the power distribution network is configured by a single-section bus, the inlet 1 and the inlet 2 are annular inlet and annular outlet 2 main lines, and the outlet 1-outlet 4 are 4 outlets.
Firstly, a protection device is configured for a single-section bus, a control protection terminal is configured for outgoing lines 1-4, incoming lines 1 and incoming lines 2 at intervals, and short address numbers are 1-6 in sequence.
And secondly, connecting the bus voltage to an analog input plug-in unit of the protection device, connecting the phase current and the zero sequence current of each wire inlet and outlet interval to an analog input module of the interval control protection terminal, connecting the arc light probe optical fibers of the bus chamber, the switch chamber and the cable chamber of each wire inlet and outlet interval to the interval control protection terminal, and connecting the operation mechanism related control and position interfaces of the circuit breaker and the disconnecting link of each wire inlet and outlet interval to the operation loop and the outlet of the interval control protection terminal.
And thirdly, connecting the control and protection terminals 1 to 6 to the protection device in a fiber point-to-point manner, specifically, connecting the Ethernet fiber communication interfaces of the CPU and the communication module of each incoming and outgoing line interval control and protection terminal with the Ethernet fiber communication interfaces of the process layer of the signal processing plug-in unit of the protection device in a point-to-point manner, and sequentially connecting the Ethernet fiber communication interfaces according to the short address numbering sequence of the control and protection terminals.
During normal operation, each interval control protection terminal organizes the interval short address number, the acquired voltage, current alternating current analog quantity, arc light analog quantity, switch position and the like into a special protocol message to be transmitted to the protection device. The protection device receives the data of each port, after checking according to the short address numbers of the set in-line and out-line intervals and the interval short address numbers in the messages, the received data of each port is cached to the corresponding interval acquisition data storage area, interpolation synchronization is carried out by adopting the Lagrange interpolation normal to the sampling time of the protection device, filtering calculation is carried out on the basis, a protection logic program is operated, finally, the execution output operation is issued to the control and protection terminal through the process layer optical fiber channel, and the control and protection terminal executes corresponding operation.
In summary, the protection device and the interval control protection terminal of the embodiment use special optical fibers as communication media, and use optical fibers to replace a large number of cables, so that on one hand, the problems of inconvenient installation, high power consumption, difficult heat dissipation and the like of the traditional centralized power distribution protection device are solved, on the other hand, complicated secondary wiring of a power distribution station room is reduced, shi Gongyun-dimensional workload and cost are reduced, and economical efficiency and reliability are enhanced; the distributed architecture replaces the current interval protection distributed configuration, the data of the whole power distribution station house can be gathered, the rapid and regional protection functions of bus protection, station domain protection and the like are increased, the engineering configuration and the fixed value and time limit cooperation among protection devices are simplified, and the operation and maintenance technical difficulty and workload are reduced.
The embodiments of the present application have been described above, the foregoing description is exemplary, not exhaustive, and not limited to the embodiments disclosed. Many modifications and variations will be apparent to those of ordinary skill in the art without departing from the scope and spirit of the various embodiments described. The terminology used herein was chosen in order to best explain the principles of the embodiments, the practical application, or the technical improvements in the marketplace, or to enable others of ordinary skill in the art to understand the embodiments disclosed herein.
Claims (6)
1. The distributed power distribution protection control system for the common bus structure is characterized by comprising a protection device and a plurality of interval control protection terminals; each incoming line interval and each outgoing line interval under the same bus are provided with an interval control terminal;
each interval control and protection terminal is used for collecting voltage alternating current analog quantity, current alternating current analog quantity, arc light analog quantity and switching value of an interval where the interval control and protection terminal is located, uploading the voltage alternating current analog quantity, the current alternating current analog quantity, the arc light analog quantity and the switching value to the protection device, and controlling opening and closing of a breaker and a disconnecting link of the interval where the interval control and protection terminal is located according to an operation command of the protection device;
the protection device is used for outputting corresponding operation commands to each interval control terminal according to the voltage alternating current analog quantity, the current alternating current analog quantity, the arc light analog quantity and the switching value which are sent by each interval control terminal and the preset protection logic;
and a special optical fiber of a process layer is used as a communication medium between the protection device and each interval control protection terminal, and a special protocol is adopted to realize high-speed data transmission and realize plug-and-play configuration-free.
2. The distributed power distribution protection control system of claim 1, wherein each interval control terminal assigns a unique interval short address number;
each interval control and protection terminal is specifically used for generating a special protocol message by using a voltage alternating current analog quantity, a current alternating current analog quantity, an arc light analog quantity and a switching value of an interval where the interval control and protection terminal is located and an interval short address number allocated to the interval control and protection terminal, and transmitting the special protocol message to the protection device through a process layer fiber channel by using a point-to-point special protocol.
3. The distributed power distribution protection control system according to claim 2, wherein the protection device is specifically configured to receive, through a dedicated port, a dedicated protocol packet sent from each interval control protection terminal, parse the received dedicated protocol packet to obtain a corresponding voltage ac analog quantity, a current ac analog quantity, an arc light analog quantity, a switching value, and an interval short address number, and buffer the received voltage ac analog quantity, current ac analog quantity, arc light analog quantity, and switching value to a collected data storage area of a corresponding interval after checking the interval short address number with a short address number of an incoming line interval or an outgoing line interval corresponding to the dedicated port.
4. The distributed power distribution protection control system according to claim 3, wherein the protection device is specifically further configured to perform interpolation synchronization on sampling moments by using a lagrangian interpolation method on data in the collected data storage area, and then process the data after the interpolation synchronization according to a preset protection logic to output a corresponding operation command to each interval control protection terminal.
5. The distributed power distribution protection control system of claim 4, wherein the protection device is used for bus protection, line longitudinal current differential protection, line network topology protection, distributed arc protection and regional self-healing control, and each interval is configured with overcurrent protection, zero sequence overcurrent protection, overcurrent acceleration protection, failure protection and reclosing.
6. The distributed power distribution protection control system according to claim 4, wherein the interval control terminals are mounted on switch cabinets or ring main units with corresponding intervals, the interval control terminals are connected with interval PT, interval CT, arc probes, a breaker operating mechanism and a disconnecting link operating mechanism, the interval CT is used for collecting interval current alternating current analog quantities, the interval PT is used for collecting interval voltage alternating current analog quantities, the arc probes are used for collecting arc light analog quantities of bus chambers, switch chambers and cable chambers in the cabinet, and the breaker operating mechanism is used for collecting interval breaker switching quantities and controlling opening and closing of the breakers; the disconnecting link operating mechanism is used for collecting the switching value of the disconnecting link at intervals and controlling the opening and closing of the disconnecting link.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311497442.7A CN117543817A (en) | 2023-11-11 | 2023-11-11 | Distributed power distribution protection control system for common bus structure |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311497442.7A CN117543817A (en) | 2023-11-11 | 2023-11-11 | Distributed power distribution protection control system for common bus structure |
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| CN117543817A true CN117543817A (en) | 2024-02-09 |
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| CN202311497442.7A Pending CN117543817A (en) | 2023-11-11 | 2023-11-11 | Distributed power distribution protection control system for common bus structure |
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