CN114243679A

CN114243679A - Multi-service cooperative power distribution method, system and device and digital power distribution terminal

Info

Publication number: CN114243679A
Application number: CN202111307175.3A
Authority: CN
Inventors: 李君�; 肖林松; 蔡田田; 邓清唐; 周到; 许健; 李益松; 张齐; 陈波; 杨英杰
Original assignee: Weisheng Information Technology Co ltd; Southern Power Grid Digital Grid Research Institute Co Ltd
Current assignee: Weisheng Information Technology Co ltd; Southern Power Grid Digital Grid Research Institute Co Ltd
Priority date: 2021-11-05
Filing date: 2021-11-05
Publication date: 2022-03-25
Anticipated expiration: 2041-11-05
Also published as: CN114243679B8; CN114243679B

Abstract

The application relates to a multi-service cooperative power distribution method, a multi-service cooperative power distribution system, a multi-service cooperative power distribution device and a digital power distribution terminal. The central power distribution terminal is connected with a plurality of sub power distribution terminals, the intelligent circuit breaker and a plurality of power supplies in the middle and low voltage power distribution network, the central power distribution terminal is respectively connected with the plurality of sub power distribution terminals through a plurality of switches, when a fault signal sent by the sub-distribution terminal and/or the intelligent circuit breaker is detected, the fault position in the medium and low voltage distribution network is determined according to the fault signal, the method determines the closing mode of a plurality of switches in the medium and low voltage distribution network according to the fault position, thereby isolating the fault and recovering power supply through a plurality of power sources, compared with the traditional method of monitoring power equipment through a plurality of different equipment and terminals, the scheme monitors the fault of the distribution network by arranging a central power distribution terminal in the medium and low voltage distribution network and maintains the operation of the distribution network by utilizing a plurality of power sources, the cooperative management of the high-voltage power supply and the low-voltage power supply can be realized, so that the management efficiency of the electric energy system is improved.

Description

Multi-service cooperative power distribution method, system and device and digital power distribution terminal

Technical Field

The present application relates to the field of power technologies, and in particular, to a multi-service cooperative power distribution method, system, device, and digital power distribution terminal.

Background

Electric power is one of important resources for maintaining normal operation of production and life of people in China, so that the maintenance of the operation safety of the electric power is an important work of an electric power management department, the management of the electric power comprises monitoring and management of a power distribution network, and the current electric power management of a distribution single network is to install a plurality of monitoring and control devices in the power distribution network for realizing different functions of control, monitoring and the like. However, the monitoring and control devices in the current power distribution network are numerous, and the monitoring workload of the monitoring and control devices is large, so that the efficiency of power distribution management of electric energy is reduced.

Therefore, current power distribution management has the disadvantage of being relatively inefficient.

Disclosure of Invention

In view of the foregoing, it is desirable to provide a multi-service cooperative power distribution method, system, device and digital power distribution terminal that can improve management efficiency.

A multi-service coordinated power distribution management method is applied to a central power distribution terminal, the central power distribution terminal is arranged in a power distribution platform area of a medium and low voltage power distribution network, the central power distribution terminal is respectively connected with an intelligent circuit breaker, a plurality of sub power distribution terminals and a plurality of power supplies in the medium and low voltage power distribution network, the central power distribution terminal is respectively connected with the plurality of sub power distribution terminals through a plurality of switches, the plurality of power supplies comprise a high-voltage power supply and a low-voltage photovoltaic power supply, and the method comprises the following steps:

detecting a fault signal sent by the sub-distribution terminal and/or the intelligent circuit breaker; the fault signals represent faults among the plurality of sub-distribution terminals or faults among the intelligent circuit breakers;

determining a fault position in the medium and low voltage distribution network according to the fault signal;

and determining the closing modes of the switches in the medium and low voltage distribution network according to the fault positions so as to isolate the fault and recover power supply through the power supplies.

In one embodiment, the plurality of sub power distribution terminals include: the power distribution system comprises a first sub power distribution terminal, a second sub power distribution terminal and a third sub power distribution terminal;

the determining a fault location in the medium and low voltage distribution network according to the fault signal includes:

if the fault signal comprises fault information uploaded by the first sub power distribution terminal and fault-free information uploaded by the second sub power distribution terminal, determining that the fault position is a first position between the first sub power distribution terminal and the second sub power distribution terminal;

and if the fault signal comprises fault information uploaded by the second sub power distribution terminal and fault-free information uploaded by the third sub power distribution terminal, determining that the fault position is a second position between the second sub power distribution terminal and the third sub power distribution terminal.

In one embodiment, each switch is respectively arranged in each sub-distribution terminal and the intelligent circuit breaker; the power supply comprises a first high-voltage power supply, a second high-voltage power supply and a low-voltage photovoltaic power supply; the intelligent circuit breaker also comprises a first intelligent circuit breaker and a second intelligent circuit breaker, and the central power distribution terminal is connected with the low-voltage photovoltaic power supply through the second intelligent circuit breaker; the central power distribution terminal is connected with the first high-voltage power supply through the first sub power distribution terminal; the central power distribution terminal is connected with the second high-voltage power supply through the third sub power distribution terminal.

In one embodiment, the determining, according to the fault location, a closing manner of the plurality of switches in the medium and low voltage distribution network includes:

if the fault position is a first position, a switching-off instruction is respectively sent to the first sub-power distribution terminal and the second sub-power distribution terminal, and a switching-on instruction is sent to the third sub-power distribution terminal, so that the switch of the first sub-power distribution terminal and the switch of the second sub-power distribution terminal are switched off, and the switch of the third sub-power distribution terminal is switched on, so that the second high-voltage power supply supplies power.

if the fault position is a second position, an opening instruction is sent to the second sub-power distribution terminal and the first intelligent circuit breaker respectively, and a closing instruction is sent to the second intelligent circuit breaker, so that the switch of the second sub-power distribution terminal and the switch of the first intelligent circuit breaker are opened, the second intelligent circuit breaker is closed, and the low-voltage photovoltaic power supply supplies power.

In one embodiment, the method further comprises the following steps:

acquiring a power load in the medium and low voltage distribution network;

if the power load is larger than a preset threshold value, sending a closing instruction to the second intelligent circuit breaker to enable the low-voltage photovoltaic power supply to supply power;

and if the power load is less than or equal to the preset threshold value, sending a switching-off instruction to the second intelligent circuit breaker, and sending an energy storage instruction to the low-voltage photovoltaic power supply to store the power quantity of the low-voltage photovoltaic power supply.

A multi-service coordinated power distribution management system comprising: the intelligent power distribution system comprises a central power distribution terminal, a plurality of sub power distribution terminals, an intelligent circuit breaker and a plurality of power supplies; the central power distribution terminal is arranged in a power distribution station area of a medium-low voltage power distribution network, the central power distribution terminal is respectively connected with an intelligent circuit breaker, a plurality of sub power distribution terminals and a plurality of power supplies in the medium-low voltage power distribution network, and the central power distribution terminal is respectively connected with the plurality of sub power distribution terminals through a plurality of switches;

the sub power distribution terminal is used for carrying out fault detection on the sub power distribution terminal and sending a detection result of the fault detection to the central power distribution terminal;

the intelligent circuit breaker is used for carrying out fault detection on the intelligent circuit breaker and sending a detection result of the fault detection to the central power distribution terminal;

the central power distribution terminal is used for detecting fault signals sent by the sub power distribution terminals and/or the intelligent circuit breakers; the fault signal represents faults among the sub power distribution terminals or faults among the intelligent circuit breakers, fault positions in the medium and low voltage power distribution network are determined according to the fault signal, and closing modes of the switches in the medium and low voltage power distribution network are determined according to the fault positions so as to isolate the faults and recover power supply through the power supplies.

The utility model provides a multi-service distribution management device in coordination, is applied to central distribution terminal, central distribution terminal sets up in the distribution station district of well low voltage distribution network, central distribution terminal respectively with intelligent circuit breaker, a plurality of sub-distribution terminal and a plurality of power connection in the well low voltage distribution network, central distribution terminal respectively through a plurality of switches with a plurality of sub-distribution terminal are connected, a plurality of power include high voltage power supply and low pressure photovoltaic power supply, the device includes:

the detection module is used for detecting fault signals sent by the sub-distribution terminals and/or the intelligent circuit breakers; the fault signals represent faults among the plurality of sub-distribution terminals or faults among the intelligent circuit breakers;

the determining module is used for determining the fault position in the medium and low voltage distribution network according to the fault signal;

and the recovery module is used for determining the closing modes of the switches in the medium and low voltage distribution network according to the fault positions so as to isolate the faults and recover power supply through the power supplies.

A digital power distribution terminal comprising a memory storing a computer program and a processor implementing the steps of the method described above when executing the computer program.

The multi-service cooperative power distribution method, the system, the device and the digital power distribution terminal are characterized in that the central power distribution terminal is arranged in the medium and low voltage power distribution network and is connected with the sub power distribution terminals, the intelligent circuit breaker and the power sources, wherein the central power distribution terminal is respectively connected with the sub power distribution terminals through the switches, when a fault signal sent by the sub power distribution terminals and/or the intelligent circuit breaker is detected, the fault position in the medium and low voltage power distribution network is determined according to the fault signal, the closing modes of the switches in the medium and low voltage power distribution network are determined according to the fault position, so that the fault is isolated and the power sources are used for recovering power supply, compared with the traditional method that the power equipment is monitored through various different equipment and terminals, the scheme monitors the fault of the power distribution network through the central power distribution terminal arranged in the medium and low voltage power distribution network, and maintains the operation of the power distribution network by utilizing the power sources, the cooperative management of the high-voltage power supply and the low-voltage power supply can be realized, so that the management efficiency of the electric energy system is improved.

Drawings

FIG. 1 is a diagram of an application environment of a multi-service coordinated power distribution management method according to an embodiment;

FIG. 2 is a schematic diagram of a central power distribution terminal in one embodiment;

FIG. 3 is a schematic diagram of a central processing unit in one embodiment;

FIG. 4 is a flowchart illustrating a method for multi-service coordinated power distribution management in one embodiment;

FIG. 5 is a block diagram illustrating an apparatus of a multi-service coordinated power distribution management method according to an embodiment;

FIG. 6 is a schematic diagram of a central power distribution terminal in another embodiment;

fig. 7 is an internal block diagram of a digital power distribution terminal in one embodiment.

Detailed Description

In order to make the objects, technical solutions and advantages of the present application more apparent, the present application is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present application and are not intended to limit the present application.

The multi-service collaborative power distribution management method provided by the application can be applied to the application environment shown in fig. 1. Wherein, central distribution terminal D21 is connected with a plurality of intelligent circuit breakers, a plurality of sub distribution terminal and high voltage power supply and low voltage photovoltaic power supply respectively through a plurality of switches. The central power distribution terminal D21 can detect fault signals sent by the sub power distribution terminals and/or the intelligent circuit breakers, determine fault positions in the medium and low voltage power distribution network according to the fault signals, and determine closing modes of a plurality of switches in the medium and low voltage power distribution network according to the fault positions so as to isolate faults and recover power supply through a plurality of power sources.

A schematic structural diagram of the central power distribution terminal may be as shown in fig. 2, and fig. 2 is a schematic structural diagram of the central power distribution terminal in an embodiment. The central processing device 102 may communicate with the remote signaling expansion device 104, the remote control expansion device 106, and the ac sampling expansion device 108, respectively. A schematic structure diagram of the central processing device 102 may be as shown in fig. 3, and fig. 3 is a schematic structure diagram of the central processing device in one embodiment. The central processing device 102, the remote signaling extension device 104, the remote control extension device 106 and the alternating current sampling extension device 108 may be arranged in a central power distribution terminal D21, the central power distribution terminal D21 may send a first detection signal to the remote signaling extension device 104 through the central processing device 102, and instruct the remote signaling extension device 104 to obtain various fault signals of devices in the power distribution station area according to the first detection signal, so that the central processing device 102 may perform fault monitoring according to the fault signals; the central processing device 102 may send a second detection signal to the remote control expansion device 106, and the remote control expansion device 102 acquires information of on-off action, operation locking and energy storage in place of the devices in the power distribution area according to the second detection signal, so that the central processing device 102 performs on-off monitoring on the devices in the power distribution area according to the information; the central processing device 102 may send a third detection signal to the ac sampling expansion device 108, and the ac sampling expansion device 108 obtains ac voltage and ac current of the equipment in the distribution substation according to the third detection signal and makes the central processing device 102 perform power quality monitoring on the equipment in the distribution substation according to the ac voltage and the ac current. For example, in one embodiment, a schematic structural diagram of the central processing device 102 may be as shown in fig. 2, and fig. 2 is a schematic structural diagram of the central processing device in one embodiment. The central processing device 102 may be a fusi-EC edge computing chip, fusi-EC is a power-dedicated edge computing chip of an autonomous 6-core processor, the dominant frequency may reach 1GHz, and the chip has 2 real-time cores 810 and 4 non-real-time cores 860. The remote signaling expansion device 104, the remote control expansion device 106, and the ac sampling expansion device 108 may be implemented as components that interface with the central processing device 102 via a set interface.

In one embodiment, as shown in fig. 4, a multi-service coordinated power distribution management method is provided, which is described by taking the method as an example applied to the central power distribution terminal in fig. 1, and includes the following steps:

step S202, detecting a fault signal sent by a sub-distribution terminal and/or an intelligent circuit breaker; the fault signal characterizes a fault between the plurality of sub-distribution terminals or a fault between the intelligent circuit breakers.

The central power distribution terminal D21 is arranged in a power distribution station area of the medium and low voltage power distribution network, the central power distribution terminal D21 is respectively connected with an intelligent circuit breaker in the medium and low voltage power distribution network and a plurality of sub power distribution terminals, and the central power distribution terminal D21 is respectively connected with the sub power distribution terminals through a plurality of switches. As shown in fig. 1, a ring main unit and a pole-mounted switch installation terminal D11, D12, D13, D14 and D15 of a medium-voltage distribution network are provided, a central distribution terminal D21 is installed in a distribution area, a low-voltage distribution line branch node is provided with an intelligent breaker K11, K12, K21, K22, K23, K24, K25, K26, K31, K32 and K33, medium-voltage fault information is transmitted to the central distribution terminal through 5G, low-voltage fault information is transmitted to the central distribution terminal through local wireless or carrier communication, the central distribution terminal F21 can also be connected to a high-voltage power supply and a photovoltaic power station, and the photovoltaic power station is connected to a low-voltage power grid as a backup power supply or a supplementary power supply. Wherein the photovoltaic power plant may be a low voltage power supply, for example a 400V power supply; the high voltage power supply may be a power supply arranged in a high voltage distribution network, such as power supply 1 and power supply 2 in fig. 1, which may be a 10000V power supply. The central distribution terminal D21 may obtain fault signals of sub-distribution terminals in the medium and low voltage distribution network, and may also obtain fault signals of the intelligent circuit breakers, where the fault signals represent faults among the plurality of sub-distribution terminals or faults among the intelligent circuit breakers.

And step S204, determining the fault position in the medium and low voltage distribution network according to the fault signal.

Among them, the fault location may be a connection location between the above-described plurality of sub distribution terminals, such as F1 and F2 in fig. 1, or a connection location between intelligent circuit breakers, such as F3 in fig. 1. The central power distribution terminal D21 may determine the location of the fault based on the fault signal described above.

And S206, determining the closing modes of a plurality of switches in the medium and low voltage distribution network according to the fault positions so as to isolate the fault and recover power supply through a plurality of power supplies.

After the central power distribution terminal D21 determines the fault location, a plurality of switches in the medium-voltage and low-voltage power distribution networks may be allocated, for example, a certain switch is switched on or a certain switch is switched off. Thereby central distribution terminal D21 can isolate the trouble and resume the power supply in distribution block district, can make corresponding power supply stop supplying power during above-mentioned switch combined floodgate and separating brake, thereby central distribution terminal D21 can be when detecting certain power and lead to stopping supplying power because above-mentioned separating brake or combined floodgate, can close floodgate or separating brake in order to connect other mains operated through controlling other switches, and central distribution terminal D21 can also manage low voltage photovoltaic power supply and high voltage power supply in coordination, need not to manage low voltage photovoltaic power supply and high voltage power supply respectively through different terminals. The central power distribution terminal D21 can cause the switch to open and close by sending a command signal.

In the multi-service coordinated power distribution management method, the central power distribution terminal is connected with the sub power distribution terminals, the intelligent circuit breaker and the power supplies in the medium and low voltage power distribution network, wherein the central power distribution terminal is respectively connected with the sub power distribution terminals through the switches, when a fault signal sent by the sub power distribution terminals and/or the intelligent circuit breaker is detected, the fault position in the medium and low voltage power distribution network is determined according to the fault signal, the closing mode of the switches in the medium and low voltage power distribution network is determined according to the fault position, so that the fault is isolated and the power supply is recovered through the power supplies, compared with the traditional method that the power equipment is monitored through various different equipment and terminals, the scheme is that the central power distribution terminal is arranged in the medium and low voltage power distribution network to monitor the faults of the power distribution network, and the power supplies are utilized to maintain the operation of the power distribution network, the cooperative management of the high-voltage power supply and the low-voltage power supply can be realized, so that the management efficiency of the electric energy system is improved.

In one embodiment, determining a fault location in the medium and low voltage power distribution network based on the fault signal comprises: if the fault signal comprises fault information uploaded by the first sub power distribution terminal and fault-free information uploaded by the second sub power distribution terminal, determining that the fault position is a first position between the first sub power distribution terminal and the second sub power distribution terminal; and if the fault signal comprises fault information uploaded by the second sub power distribution terminal and fault-free information uploaded by the third sub power distribution terminal, determining that the fault position is a second position between the second sub power distribution terminal and the third sub power distribution terminal.

In this embodiment, the plurality of sub power distribution terminals include: the first sub power distribution terminal, the second sub power distribution terminal and the third sub power distribution terminal. As shown in fig. 1, before the fault occurs, the power supply 1 and the power supply 2 supply power normally, the power supply 3 is not switched on, the interconnection switch D13 is opened, and the communication switches D11, D12, D14 and D15 are closed. When a fault occurs at F1 between D11 and D12, the sub distribution terminal D11 detects fault information, the adjacent node D12 is synchronously inquired whether a fault occurs or not, D11 uploads the information that the node has a fault and D12 has no fault to the central distribution terminal D21 through the 5G network, and therefore the central distribution terminal D21 can determine that the fault position is F1.

When a fault occurs at F2 between D12 and D13, the sub distribution terminal D12 detects fault information, the adjacent node D13 is synchronously inquired whether a fault occurs or not, D12 uploads the information that the node has a fault and D13 has no fault to the central distribution terminal D21 through the 5G network, and therefore the central distribution terminal D21 can determine that the fault position is F2.

With the present embodiment, the central power distribution terminal D21 can determine the location of a fault in the power distribution substation area using the fault detection results of the sub power distribution terminals, thereby improving the efficiency of power management.

In one embodiment, determining a manner of closing a plurality of switches in a medium and low voltage power distribution network based on a fault location comprises: if the fault position is a first position, a switching-off instruction is respectively sent to the first sub-power distribution terminal and the second sub-power distribution terminal, and a switching-on instruction is sent to the third sub-power distribution terminal, so that a switch of the first sub-power distribution terminal and a switch of the second sub-power distribution terminal are switched off, and a switch of the third sub-power distribution terminal is switched on, so that the second high-voltage power supply supplies power; and if the fault position is a second position, a switching-off instruction is respectively sent to the second sub-power distribution terminal and the first intelligent circuit breaker, and a switching-on instruction is sent to the second intelligent circuit breaker, so that the switch of the second sub-power distribution terminal and the switch of the first intelligent circuit breaker are switched off, the second intelligent circuit breaker is switched on, and the low-voltage photovoltaic power supply is powered on.

In this embodiment, each switch is respectively disposed in each sub-distribution terminal and the intelligent circuit breaker; the power supply comprises a first high-voltage power supply, a second high-voltage power supply and a low-voltage photovoltaic power supply; wherein the first high voltage power source may be power source 1 as in fig. 1, the second high voltage power source may be power source 2 as in fig. 1, and the low voltage photovoltaic power source may be power source 3 in fig. 1; the intelligent circuit breaker also comprises a first intelligent circuit breaker and a second intelligent circuit breaker, and the central power distribution terminal is connected with the low-voltage photovoltaic power supply through the second intelligent circuit breaker; the central power distribution terminal is connected with the first high-voltage power supply through the first sub power distribution terminal; the central power distribution terminal is connected with the second high-voltage power supply through the third sub-power distribution terminal. After the central power distribution terminal D21 determines that the fault position is F1, the central power distribution terminal D21 positions that the fault occurs between D11 and D12, and sends a brake separating instruction to D11 and D12 to isolate the fault; due to the fact that D11 and D12 are switched off, the power distribution station is in power loss, D21 detects that the high-voltage side of the power distribution station is in power loss, a switching-on command is sent to D13, and power supply of the power distribution station is recovered by connecting a second high-voltage power supply.

After the central power distribution terminal D21 determines that the fault position is F2, the central power distribution terminal D21 positions that the fault occurs between D12 and D13, and sends a brake separating instruction to D12 to isolate the fault and power loss of a power distribution station area; the distribution substation cannot be supplied with power through the power supply 2 due to the fault occurring between D12 and D13; central power distribution terminal D21 detects the distribution station and loses the electricity, sends the first intelligent circuit breaker K11 with the separating brake instruction through local wireless/carrier communication, and the closing brake instruction is sent second intelligent circuit breaker K12, through power 3 photovoltaic power station, low pressure photovoltaic power supply provides the power for the user in platform district promptly.

Through this embodiment, center distribution terminal D21 can be through controlling the switch in distribution station district to utilize the power supply of different power source recovery station districts when sending power failure, realized the cooperative management to high-low pressure side power, thereby improved the effect of electric energy management's efficiency.

In one embodiment, further comprising: acquiring power load in a medium and low voltage distribution network; if the power load is larger than the preset threshold value, a closing instruction is sent to the second intelligent circuit breaker, so that the low-voltage photovoltaic power supply supplies power; and if the power load is less than or equal to the preset threshold value, a switching-off instruction is sent to the second intelligent circuit breaker, and an energy storage instruction is sent to the low-voltage photovoltaic power supply, so that the low-voltage photovoltaic power supply stores the electric quantity.

In this embodiment, central distribution terminal D21 can carry out the charging management to the distribution station district, and the station district user has ordinary resident user, fills electric pile circuit 1, fills electric pile circuit 2, and every fills electric pile circuit and installs the battery charging outfit a plurality of, and the orderly management flow of charging is: the central power distribution terminal D21 calculates transformer power, electric quantity and current data of the transformer area in real time, and collects power, electric quantity and current data of each intelligent circuit breaker through local wireless/carrier communication. When the load of a charging pile circuit is increased and exceeds the allowable power supply capacity of a transformer in a distribution area, the voltage, the current, the phase and the power of the D21 are monitored to achieve the grid-connected condition of the distributed power supply, the K12 is switched on, the power supply of a photovoltaic power station is switched on, the power supply capacity of the distribution area is improved, and the power supply of a charging peak is realized. When the transformer of the transformer area can meet the load requirement by self power supply, the K12 is switched off, and meanwhile, the energy storage system of the photovoltaic power station is started to store the redundant generated energy.

Through this embodiment, central distribution terminal D21 can be through detecting power load, realizes source net load interdynamic to and measurement, monitoring, the collaborative work of control business, realize the collaborative management to high-low voltage side power, thereby improved the effect of electric energy management's efficiency.

It should be understood that, although the steps in the flowchart of fig. 4 are shown in order as indicated by the arrows, the steps are not necessarily performed in order as indicated by the arrows. The steps are not performed in the exact order shown and described, and may be performed in other orders, unless explicitly stated otherwise. Moreover, at least a portion of the steps in fig. 4 may include multiple steps or multiple stages, which are not necessarily performed at the same time, but may be performed at different times, which are not necessarily performed in sequence, but may be performed in turn or alternately with other steps or at least a portion of the other steps or stages.

In one embodiment, as shown in fig. 5, there is provided a multi-service cooperative power distribution management apparatus, including: a detection module 500, a determination module 502, and a recovery module 504, wherein:

the detection module 500 is used for detecting a fault signal sent by the sub-distribution terminal and/or the intelligent circuit breaker; the fault signal characterizes a fault between the plurality of sub-distribution terminals or a fault between the intelligent circuit breakers.

A determining module 502 is configured to determine a fault location in the medium and low voltage power distribution network according to the fault signal.

The recovery module 504 is configured to determine, according to the fault location, a closing manner of a plurality of switches in the medium and low voltage power distribution network, so as to isolate the fault and recover power supply through a plurality of power sources.

In an embodiment, the determining module 502 is specifically configured to determine that the fault location is a first location between the first sub power distribution terminal and the second sub power distribution terminal if the fault signal includes fault information uploaded by the first sub power distribution terminal and no fault information uploaded by the second sub power distribution terminal; and if the fault signal comprises fault information uploaded by the second sub power distribution terminal and fault-free information uploaded by the third sub power distribution terminal, determining that the fault position is a second position between the second sub power distribution terminal and the third sub power distribution terminal.

In an embodiment, the recovery module 504 is specifically configured to, if the fault location is the first location, respectively send an opening instruction to the first sub power distribution terminal and the second sub power distribution terminal, and send a closing instruction to the third sub power distribution terminal, so that the switch of the first sub power distribution terminal and the switch of the second sub power distribution terminal are opened, and the switch of the third sub power distribution terminal is closed, so that the second high-voltage power supply supplies power; and if the fault position is a second position, a switching-off instruction is respectively sent to the second sub-power distribution terminal and the first intelligent circuit breaker, and a switching-on instruction is sent to the second intelligent circuit breaker, so that the switch of the second sub-power distribution terminal and the switch of the first intelligent circuit breaker are switched off, the second intelligent circuit breaker is switched on, and the low-voltage photovoltaic power supply is powered on.

In one embodiment, the above apparatus further comprises: the load management module is used for acquiring the power load in the medium and low voltage distribution network; if the power load is larger than the preset threshold value, a closing instruction is sent to the second intelligent circuit breaker, so that the low-voltage photovoltaic power supply supplies power; and if the power load is less than or equal to the preset threshold value, a switching-off instruction is sent to the second intelligent circuit breaker, and an energy storage instruction is sent to the low-voltage photovoltaic power supply, so that the low-voltage photovoltaic power supply stores the electric quantity.

For specific limitations of the multi-service cooperative power distribution management apparatus, reference may be made to the above limitations of the multi-service cooperative power distribution management method, which is not described herein again. The modules in the multi-service coordinated power distribution management device can be wholly or partially implemented by software, hardware and a combination thereof. The modules can be embedded in a hardware form or independent of a processor in the digital power distribution terminal, and can also be stored in a memory in the digital power distribution terminal in a software form, so that the processor can call and execute the corresponding operations of the modules.

In one embodiment, a multi-service coordinated power distribution system is provided. The method comprises the following steps: a central power distribution terminal D21, a sub power distribution terminal and an intelligent circuit breaker; the central power distribution terminal is arranged in a power distribution station area of the medium-low voltage power distribution network, the central power distribution terminal is respectively connected with the intelligent circuit breaker, the plurality of sub power distribution terminals and the plurality of power supplies in the medium-low voltage power distribution network, and the central power distribution terminal is respectively connected with the plurality of sub power distribution terminals through the plurality of switches.

The sub-power distribution terminal is used for carrying out fault detection on the sub-power distribution terminal and sending a detection result of the fault detection to the central power distribution terminal D21;

the intelligent circuit breaker is used for carrying out fault detection on the intelligent circuit breaker and sending a detection result of the fault detection to the central power distribution terminal D21;

the central power distribution terminal D21 is used for detecting fault signals sent by the sub power distribution terminals and/or the intelligent circuit breakers; the fault signal represents a fault between the sub-power distribution terminals or a fault between the intelligent circuit breakers, the fault position in the medium and low voltage power distribution network is determined according to the fault signal, and the closing modes of a plurality of switches in the medium and low voltage power distribution network are determined according to the fault position so as to isolate the fault and recover power supply through a plurality of power supplies.

For the description of the multi-service cooperative power distribution method, system, device and digital power distribution terminal, reference is made to the above description of the multi-service cooperative power distribution management method, and details are not repeated here.

In one embodiment, as shown in fig. 6, fig. 6 is a schematic structural diagram of a central power distribution terminal in another embodiment. The central power distribution terminal D21 includes: the system comprises a central processing device 102, a remote signaling extension device 104, a remote control extension device 106 and an alternating current sampling extension device 108; the remote signaling expansion device 104 can be connected to the central processing device 102 through a 48-way interface, the remote control expansion device 106 can be connected to the central processing device through a 32-way interface, and the ac sampling expansion device 108 can be connected to the central processing device 102 through a 32-way interface.

The remote signaling extension device 104 and the remote control extension device 106 may each be used to detect fault signals sent by sub-distribution terminals and/or smart circuit breakers.

The central processing device 102 may be disposed in the central power distribution terminal D21, the central processing device 102 may be a core component in the central power distribution terminal D21, the remote signaling extension device 104 may be a remote signaling extension component in the central power distribution terminal D21, the remote control extension device 106 may be a remote control extension component in the central power distribution terminal D21, and the ac sampling extension device 108 may be an ac sampling extension component in the central power distribution terminal D21. The central power distribution terminal D21 may be a modular digital power distribution terminal and may be composed of a variety of components, for example, the central power distribution terminal D21 may be composed of a core component, a remote signaling extension component, a remote control extension component, an ac sampling extension component, and the like. The central processing device 102, i.e. the above core components, may include a cpu, a power supply, and a storage device, for example, the core components may include a main board, an interface board, a power board, a carrier component, an ethernet communication component, a wireless communication component, a remote control ac sampling component, and the like. The cpu may be a FUXI-EC edge computing chip, the storage device may include eMMC (Embedded multimedia Card), flash memory, and DDR (Double Data Rate) type storage devices, and the core component further includes a plurality of interfaces, which may be used to access different types of functional modules and devices, so as to implement corresponding functions. The FUXI-EC can be an autonomous 6-core processor, the main frequency can reach 1GHz, the FUXI-EC is provided with 2 810 real-time cores and 4 860 non-real-time cores, the 2 real-time cores mainly complete protection operation and power quality data analysis, the 4 860 non-real-time cores mainly complete protocol communication with a main station, and data reading and low-voltage power metering of downlink equipment. As shown in fig. 7, the DDR3 carried by the fusi-EC small motherboard can be SCB13H8G162BF, the QSPI Flash can be GD25Q256DFIGR, the eMMC can be FEMDRW008G, and the strong computing power of fusi-EC is utilized to realize the digital grid edge computing control of medium and low voltage collaborative management and multi-service collaboration.

The remote signaling extension assembly, the remote control extension assembly and the alternating current sampling extension assembly can be connected with the core assembly and can be flexibly disassembled, the core assembly is converted into the core assembly shown in the figure 2 after being disassembled, the core assembly can independently operate, 8 paths of Ethernet interfaces are supported, 6 paths of RS232 or RS485 interfaces, 12 paths of remote signaling interfaces, 4 paths of control interfaces, 8 paths of alternating voltage sampling and 8 paths of alternating current sampling are realized. The core component can be applied to switch control on a medium-voltage column and monitoring of a low-voltage distribution substation, and two products of an original FTU (Feeder Terminal Unit) and a original TTU (distribution Transformer supervisory Terminal) are replaced. The remote signaling extension assembly, the remote control extension assembly and the alternating current sampling extension assembly can be connected with the core assembly in a combined mode, the remote signaling can be extended to 48-channel access, the remote control can be extended to 32-channel access, the alternating current sampling can be extended to 32-channel access, monitoring and control of the 8-channel medium-voltage switch are achieved, and the original DTU function is replaced. After the digital power distribution terminal is installed in a power distribution room, medium-voltage monitoring and protection functions in the power distribution room can be realized, low-voltage line monitoring and protection functions are realized simultaneously, original DTU (Data Transfer unit) and protection products of medium voltage in the power distribution room are replaced, original TTU products of low voltage are replaced simultaneously, and integration of three major products is realized. The DTU function can collect alternating voltage and current and support out-of-limit uploading; single-phase earth fault detection, short-circuit fault detection, overcurrent and overload protection; and acquiring state quantity information such as switching action, operation locking, energy storage in place and the like.

The central power distribution terminal D21 may perform various types of monitoring of the equipment in the distribution substation area through the central processing device 102, for example, the central processing device 102 may control the remote signaling remote control extension device to detect fault signals sent by sub-distribution terminals and/or intelligent circuit breakers. For example, in an embodiment, the central processing device 102 includes two real-time cores, which are a first real-time core and a second real-time core, where the real-time cores are embedded in the system and require that the cores have a strong real-time constraint, can process external requests quickly, and respond to the requests within a specified time. The central processing device 102 may call the first real-time core to obtain a fault signal sent by the sub-distribution terminal and/or the intelligent circuit breaker and sent by the remote control expansion device, and call the second real-time core to obtain an alternating voltage and an alternating current of the medium and low voltage distribution network and sent by the alternating current sampling expansion device.

The digital power distribution terminal, i.e. the central power distribution terminal D21, may call each device through the operating system running therein, for example, SylixOS may run in the digital power distribution terminal, and 3 operating systems may run simultaneously. The SylixOS1 runs on 4 non-real-time cores and is responsible for applications supported by platforms such as a data center, system management and an MQTT bus and the like and the realization of monitoring and metering services, the SylixOS2 runs on the real-time core 1 and is responsible for protection and the realization of control services, and the SylixOS3 runs on the real-time core 2 and is responsible for the realization of power quality and PMU services. And the FUXI-EC chip in the central power distribution terminal D21 runs an embedded multi-operating system of an autonomous CPU multi-core architecture, integrates the functions of TTU of the intelligent transformer area, and comprises functions of a container APP, a metering APP and the like, so that analog quantity acquisition, calculation, remote signaling quantity acquisition and remote control execution of a conventional power distribution terminal can be realized, and various services can be realized to work cooperatively.

In one embodiment, the central processing facility 102 may control the remote signaling extension facility 104 to receive a failure signal or control the remote extension facility 102 to receive a failure signal. The remote signaling expansion device 104 may be an expansion component connected to the central processing device 102, and the remote signaling expansion device 104 may obtain a fault signal, thereby obtaining various fault signals in the power distribution substation, including a ground signal, a short-circuit signal, an overcurrent signal, and a load signal, and send the collected ground signal, short-circuit signal, overcurrent signal, and load signal to the central processing device 102, so that the central processing device 102, that is, the core component, may perform fault monitoring on the power distribution substation according to the ground signal, short-circuit signal, overcurrent signal, and load signal. For example, the central processing device 102 may determine whether a single-phase ground fault occurs in the distribution substation area according to the ground signal; the central processing device 102 may monitor whether a short-circuit fault occurs in the power distribution area according to the short-circuit signal; the central processing device 102 may monitor whether an overcurrent fault occurs in the power distribution substation according to the overcurrent signal, and if so, the central processing device 102 may perform overcurrent protection on the power distribution substation; the central processing device 102 may monitor whether an overload fault occurs in the power distribution substation according to the load signal, and if so, the central processing device 102 may perform overload protection on devices in the power distribution substation.

In addition, the central processing device 102 may also control the remote control expansion device 106 to receive a fault signal, the remote control expansion device 106 may be an expansion component connected to the central processing device 102, the remote control expansion device 106 may obtain the fault signal, and may also obtain various switching signals in the distribution substation area, including switching action, operation locking, energy storage in-place information, and the like, and send the collected switching action, operation locking, and energy storage in-place information to the central processing device 102, so that the central processing device 102, i.e., the core component, may perform switching monitoring on and off on devices in the distribution substation area according to the switching action, operation locking, and energy storage in-place information. Wherein, the operation locking comprises preventing the circuit breaker from being opened and closed by mistake; the isolating switch is prevented from being switched on and off under load; preventing the charged hanging (closing) of a grounding wire (a grounding switch); the detection contents such as a circuit breaker (an isolating switch) and the like are prevented from being closed by a grounding wire (an earthing switch). The energy storage in place refers to whether the storage of the electric energy reaches a preset threshold value.

In one embodiment, the central power distribution terminal D21 further includes an ac sampling expansion device 108 for acquiring ac voltage and ac current of the medium and low voltage power distribution network and sending the ac voltage and ac current to the central processing device;

and the central processing equipment 102 is used for monitoring the power quality of the medium and low voltage distribution network according to the alternating voltage and the alternating current.

In the multi-service cooperative power distribution method, the system, the device and the digital power distribution terminal, the central power distribution terminal is arranged in the medium and low voltage power distribution network and is connected with the plurality of sub power distribution terminals and the intelligent circuit breaker, wherein the central power distribution terminal is respectively connected with a plurality of sub power distribution terminals through a plurality of switches and detects fault signals sent by the sub power distribution terminals and/or the intelligent circuit breakers, determining the fault position in the medium and low voltage distribution network according to the fault signal, determining the closing mode of a plurality of switches in the medium and low voltage distribution network according to the fault position, thereby isolating the fault and recovering the power supply, compared with the traditional method of monitoring the power equipment through various different equipment and terminals, the scheme monitors the power distribution network through arranging the central power distribution terminal in the medium and low voltage power distribution network, the cooperative management of the high-voltage power supply and the low-voltage power supply can be realized, so that the management efficiency of the electric energy system is improved.

In one embodiment, the system further comprises: the aerial plug access device, the mutual inductor and the signal conditioning circuit; the aerial plug access equipment is used for acquiring a medium-voltage current signal of a power distribution area and sending the medium-voltage current signal to the mutual inductor; the mutual inductor is used for isolating the medium-voltage current signal and sending the isolated medium-voltage current signal to the signal conditioning circuit; the signal conditioning circuit is used for performing analog-to-digital conversion on the isolated medium-voltage current signal through the operational amplifier and sending the medium-voltage current signal subjected to the analog-to-digital conversion to the central processing device 102; and the central processing device 102 is configured to obtain the medium-voltage and current signals after analog-to-digital conversion through the serial peripheral interface, and perform medium-voltage and current monitoring on the power distribution area according to the medium-voltage and current signals after analog-to-digital conversion.

Through the embodiment, the acquisition and detection of the medium-voltage electric current signals are realized through the aviation plug access device, the mutual inductor, the signal conditioning circuit and the central processing device 102 in the same central power distribution terminal D21, and the management efficiency of the electric energy system is improved.

In one embodiment, the system further comprises: an isolation operational amplifier; the isolation operational amplifier is used for acquiring direct-current voltage of equipment in the power distribution station area, isolating the direct-current voltage according to a preset isolation voltage value, amplifying the isolated direct-current voltage according to a preset amplification factor, and sending the amplified direct-current voltage to the central processing equipment; and the central processing equipment is used for monitoring the direct-current voltage of the equipment in the power distribution station area according to the amplified direct-current voltage.

In one embodiment, the system further comprises: time service equipment and real-time clock equipment; the time service equipment is used for acquiring current precise satellite time and sending the current precise satellite time to the central processing equipment 102; the central processing device 102 is used for sending the current precise satellite time to the real-time clock device; and the real-time clock equipment is used for timing the equipment in the power distribution station area according to the current accurate satellite time.

According to the embodiment, time synchronization of the multi-service cooperative power distribution method, system and device, the digital power distribution terminal and the power equipment is realized by using the time service equipment, the real-time clock equipment and the central processing equipment 102 which are arranged in the same central power distribution terminal D21, and the management efficiency of the multi-service cooperative power distribution method, system and device and the digital power distribution terminal is improved.

In one embodiment, the system further comprises: the power supply device, the isolation power supply device and the voltage converter; a power supply device for transmitting an input voltage to the isolated power supply device; an isolated power supply device for reducing an input voltage to a first voltage value, the first voltage value being input to the voltage converter; a voltage converter for reducing the first voltage value to a second voltage value, and inputting the second voltage value to the central processing apparatus 102; and the central processing device 102 is used for supplying power to the central processing device 102 according to the second voltage value.

Additionally, in one embodiment, the system further comprises: a super capacitor; the isolation power supply equipment is also used for inputting a first voltage value into the super capacitor; and the super capacitor is used for charging the super capacitor according to the first voltage value.

Additionally, in one embodiment, the isolated power supply device is further to: converting the first voltage value into an isolated first voltage value, and sending the isolated first voltage value to the communication interface; and the communication interface is used for supplying power to the communication interface according to the isolated first voltage value.

Through the embodiment, the power supply device, the isolation power supply device, the voltage converter and the super capacitor which are arranged in the same central power distribution terminal D21 are utilized to realize power supply of the multi-service cooperative power distribution system, and the management efficiency of the multi-service cooperative power distribution system is improved.

In one embodiment, a digital power distribution terminal is provided, which may be a central power distribution terminal, the internal structure of which may be as shown in fig. 7. The digital power distribution terminal comprises a processor, a memory, a communication interface, a display screen and an input device which are connected through a system bus. Wherein the processor of the digital power distribution terminal is configured to provide computing and control capabilities. The memory of the computer device comprises a nonvolatile storage medium and an internal memory. The non-volatile storage medium stores an operating system and a computer program. The internal memory provides an environment for the operation of an operating system and computer programs in the non-volatile storage medium. The communication interface of the digital power distribution terminal is used for carrying out wired or wireless communication with an external terminal, and the wireless communication can be realized through WIFI, an operator network, NFC (near field communication) or other technologies. The computer program is executed by a processor to implement a multi-service coordinated power distribution management method. The display screen of the digital power distribution terminal can be a liquid crystal display screen or an electronic ink display screen, and the input device of the digital power distribution terminal can be a touch layer covered on the display screen, a key, a track ball or a touch pad arranged on the shell of the digital power distribution terminal, an external keyboard, a touch pad or a mouse and the like.

Those skilled in the art will appreciate that the configuration shown in fig. 7 is a block diagram of only a portion of the configuration associated with the present application and does not constitute a limitation on the digital power distribution terminal to which the present application is applied, and a particular digital power distribution terminal may include more or less components than those shown, or combine certain components, or have a different arrangement of components.

In one embodiment, a digital power distribution terminal is provided, which includes a memory and a processor, wherein the memory stores a computer program, and the processor executes the computer program to implement the multi-service cooperative power distribution management method.

It will be understood by those skilled in the art that all or part of the processes of the methods of the embodiments described above can be implemented by hardware instructions of a computer program, which can be stored in a non-volatile computer-readable storage medium, and when executed, can include the processes of the embodiments of the methods described above. Any reference to memory, storage, database or other medium used in the embodiments provided herein can include at least one of non-volatile and volatile memory. Non-volatile Memory may include Read-Only Memory (ROM), magnetic tape, floppy disk, flash Memory, optical storage, or the like. Volatile Memory can include Random Access Memory (RAM) or external cache Memory. By way of illustration and not limitation, RAM can take many forms, such as Static Random Access Memory (SRAM) or Dynamic Random Access Memory (DRAM), among others.

The technical features of the above embodiments can be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the above embodiments are not described, but should be considered as the scope of the present specification as long as there is no contradiction between the combinations of the technical features.

The above-mentioned embodiments only express several embodiments of the present application, and the description thereof is more specific and detailed, but not construed as limiting the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the concept of the present application, which falls within the scope of protection of the present application. Therefore, the protection scope of the present patent shall be subject to the appended claims.

Claims

1. The multi-service coordinated power distribution management method is applied to a central power distribution terminal, the central power distribution terminal is arranged in a power distribution area of a medium-low voltage power distribution network, the central power distribution terminal is respectively connected with an intelligent circuit breaker, a plurality of sub power distribution terminals and a plurality of power supplies in the medium-low voltage power distribution network, the central power distribution terminal is respectively connected with the plurality of sub power distribution terminals through a plurality of switches, the plurality of power supplies comprise a high-voltage power supply and a low-voltage photovoltaic power supply, and the method comprises the following steps:

2. The method of claim 1, wherein the plurality of sub-distribution terminals comprises: the power distribution system comprises a first sub power distribution terminal, a second sub power distribution terminal and a third sub power distribution terminal;

3. The method of claim 2, wherein each switch is provided in each of the sub-distribution terminals and smart circuit breakers, respectively; the power supply comprises a first high-voltage power supply, a second high-voltage power supply and a low-voltage photovoltaic power supply; the intelligent circuit breaker also comprises a first intelligent circuit breaker and a second intelligent circuit breaker, and the central power distribution terminal is connected with the low-voltage photovoltaic power supply through the second intelligent circuit breaker; the central power distribution terminal is connected with the first high-voltage power supply through the first sub power distribution terminal; the central power distribution terminal is connected with the second high-voltage power supply through the third sub power distribution terminal.

4. The method of claim 3, wherein said determining a manner of closing the plurality of switches in the medium and low voltage power distribution network based on the fault location comprises:

5. The method of claim 3, wherein said determining a manner of closing the plurality of switches in the medium and low voltage power distribution network based on the fault location comprises:

6. The method of claim 3, further comprising:

acquiring a power load in the medium and low voltage distribution network;

and if the power load is larger than a preset threshold value, sending a closing instruction to the second intelligent circuit breaker to enable the low-voltage photovoltaic power supply to supply power.

7. The method of claim 6, wherein after obtaining the electrical load in the medium and low voltage distribution network, further comprising:

8. A multi-service coordinated power distribution management system, comprising: the intelligent power distribution system comprises a central power distribution terminal, a plurality of sub power distribution terminals, an intelligent circuit breaker and a plurality of power supplies; the central power distribution terminal is arranged in a power distribution station area of a medium-low voltage power distribution network, the central power distribution terminal is respectively connected with an intelligent circuit breaker, a plurality of sub power distribution terminals and a plurality of power supplies in the medium-low voltage power distribution network, the central power distribution terminal is respectively connected with the plurality of sub power distribution terminals through a plurality of switches, and the plurality of power supplies comprise a high-voltage power supply and a low-voltage photovoltaic power supply;

9. The utility model provides a multi-service distribution management device in coordination which characterized in that is applied to central distribution terminal, central distribution terminal sets up in the distribution platform district of well low voltage distribution network, central distribution terminal respectively with intelligent circuit breaker, a plurality of sub-distribution terminal and a plurality of power connection in the well low voltage distribution network, central distribution terminal respectively through a plurality of switches with a plurality of sub-distribution terminal are connected, a plurality of power include high voltage power supply and low voltage photovoltaic power supply, the device includes:

10. A digital power distribution terminal comprising a memory and a processor, the memory storing a computer program, characterized in that the processor, when executing the computer program, implements the steps of the method of any of claims 1 to 7.