WO2019042104A1 - 直流微电网系统及其通信方法 - Google Patents

直流微电网系统及其通信方法 Download PDF

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Publication number
WO2019042104A1
WO2019042104A1 PCT/CN2018/099455 CN2018099455W WO2019042104A1 WO 2019042104 A1 WO2019042104 A1 WO 2019042104A1 CN 2018099455 W CN2018099455 W CN 2018099455W WO 2019042104 A1 WO2019042104 A1 WO 2019042104A1
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WIPO (PCT)
Prior art keywords
power
devices
bus
network
information
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PCT/CN2018/099455
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English (en)
French (fr)
Inventor
林宝伟
赵志刚
任鹏
文武
Original Assignee
格力电器（武汉）有限公司
珠海格力电器股份有限公司
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Publication of WO2019042104A1 publication Critical patent/WO2019042104A1/zh

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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
    • H02J13/00007—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 the power network as support for the transmission
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B3/00—Line transmission systems
    • H04B3/54—Systems for transmission via power distribution lines
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L12/00—Data switching networks
    • H04L12/28—Data switching networks characterised by path configuration, e.g. LAN [Local Area Networks] or WAN [Wide Area Networks]
    • H04L12/40—Bus networks
    • H04L12/40143—Bus networks involving priority mechanisms
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L12/00—Data switching networks
    • H04L12/28—Data switching networks characterised by path configuration, e.g. LAN [Local Area Networks] or WAN [Wide Area Networks]
    • H04L12/46—Interconnection of networks
    • H04L12/4633—Interconnection of networks using encapsulation techniques, e.g. tunneling
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L61/00—Network arrangements, protocols or services for addressing or naming
    • H04L61/50—Address allocation
    • H04L61/5007—Internet protocol [IP] addresses
    • 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
    • H02J1/00—Circuit arrangements for dc mains or dc distribution networks
    • H02J1/14—Balancing the load in a network
    • 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
    • H02J13/00002—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 monitoring
    • 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
    • H02J2310/00—The network for supplying or distributing electric power characterised by its spatial reach or by the load
    • H02J2310/50—The network for supplying or distributing electric power characterised by its spatial reach or by the load for selectively controlling the operation of the loads
    • H02J2310/66—The network for supplying or distributing electric power characterised by its spatial reach or by the load for selectively controlling the operation of the loads one of the loads acting as master and the other or others acting as slaves
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y04—INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
    • Y04S—SYSTEMS INTEGRATING TECHNOLOGIES RELATED TO POWER NETWORK OPERATION, COMMUNICATION OR INFORMATION TECHNOLOGIES FOR IMPROVING THE ELECTRICAL POWER GENERATION, TRANSMISSION, DISTRIBUTION, MANAGEMENT OR USAGE, i.e. SMART GRIDS
    • Y04S10/00—Systems supporting electrical power generation, transmission or distribution
    • Y04S10/30—State monitoring, e.g. fault, temperature monitoring, insulator monitoring, corona discharge

Definitions

  • the present disclosure relates to the field of power technologies, and in particular, to a DC microgrid system and a communication method thereof.
  • the communication system architecture is mainly based on RS485 and other master-slave bus architectures.
  • the main problem of the scheme is that in the case of a large number of system nodes, the master-slave structure is difficult to guarantee the real-time performance of the system. .
  • the overall system is relatively poorly scalable, and the system involves wiring, installation, and the like.
  • the equipment In the entire microgrid system, the equipment is basically not intelligent, and the whole system is not flexible enough. At the same time, in most current microgrid systems, it is basically a single voltage level and cannot be applied to different load voltages.
  • One or more embodiments of the present disclosure provide a DC microgrid system and a communication method thereof, which can solve the problem of poor real-time performance and flexibility of the microgrid system in the related art.
  • Embodiments of the present disclosure provide a DC microgrid system, wherein the system is based on power carrier communication, including at least an energy controller, at least one device; the energy controller is coupled to the device for receiving After the network access application of the device, the network address is allocated to the device; and the device is configured to register the network according to the network address.
  • the system further includes: an interaction terminal, connected to the energy controller, configured to monitor each of the devices in the system and display information of each of the devices; and After the control request, the control request is forwarded to the energy controller; the energy controller is configured to implement control of the device after receiving the control request forwarded by the interactive terminal.
  • an interaction terminal connected to the energy controller, configured to monitor each of the devices in the system and display information of each of the devices; and After the control request, the control request is forwarded to the energy controller; the energy controller is configured to implement control of the device after receiving the control request forwarded by the interactive terminal.
  • the energy controller is further configured to determine, according to the device information reported by the device, whether the device is allowed to access the network.
  • the device is configured to report its own power consumption information, and report the power to the bus in real time when the power consumption information changes.
  • the system further includes: a current transformer, a power grid, a photovoltaic DC/DC, a photovoltaic power generation module, an energy storage DC/DC, an energy storage battery; the converter, configured to acquire each of the devices through a bus
  • the power consumption information, the power output of the power grid is adjusted in real time according to the system operation power demand;
  • the photovoltaic DC/DC is used to obtain the power consumption information of each of the devices through the bus, and adjust the photovoltaic power according to the system operation power demand in real time.
  • the power output of the power generation module; the energy storage DC/DC is used to obtain power consumption information of each of the devices through a bus, and adjust the power output of the energy storage battery in real time according to the system operation power demand.
  • the energy controller is configured to obtain power consumption information, system power generation information, and system energy storage information of each of the devices, and the current converter, the photovoltaic DC/DC, and the The energy storage DC/DC and each device are scheduled.
  • the energy control strategy includes at least one of an economic priority policy, a revenue priority policy, a peak-to-valley power policy, and a ladder power mode policy.
  • the system further includes: a cross-voltage carrier module for dividing a voltage level of the system according to different load voltages.
  • the device is configured to detect a communication state of the bus before transmitting the data, and when detecting that the communication state of the bus is busy, send data according to the device priority until the data is successfully sent to the bus.
  • the device is configured to send, to the bus, a network address and a control data of the device to be controlled, where the control data is used to implement control of the device to be controlled.
  • the device is configured to perform data interaction with other devices in the system based on a no-master-slave relationship communication manner.
  • the device is configured to send off-network information to other devices in the system, and leave the network after being confirmed by other devices.
  • the system further includes: an external metering module, configured to collect power usage information of each device in the system.
  • An embodiment of the present disclosure provides a communication method of a DC microgrid system, where the system is based on power carrier communication, wherein the method includes: after receiving an application for accessing the device, the energy controller allocates a network address to the device; The device registers with the network according to the network address.
  • the method further includes: after receiving the control request of the user, the interaction terminal forwards the control request to the energy controller; and after the energy controller receives the control request forwarded by the interaction terminal, implementing the device control.
  • the method further includes: determining, by the energy controller, whether the device is allowed to access the network according to the device information reported by the device.
  • the method further includes: the device reporting its own power consumption information, or the system collects power usage information of each of the devices by using an external metering module; and the converter obtains each of the devices by using a bus.
  • the power consumption information is used to adjust the power output of the power grid in real time according to the system operation power demand;
  • the photovoltaic DC/DC obtains the power consumption information of each of the devices through the bus, and adjusts the power output of the photovoltaic power generation module in real time according to the system operation power demand;
  • the energy storage DC/ The DC obtains the power consumption information of each of the devices through the bus, and adjusts the power output of the energy storage battery in real time according to the power demand of the system.
  • the method further includes: the energy controller acquiring the power consumption information, the system power generation information, and the system energy storage information of each of the devices, and changing the energy according to the energy control policy.
  • the flow controller, the photovoltaic DC/DC, the energy storage DC/DC, and each of the devices are scheduled; wherein the energy control strategy includes: an economic priority strategy, a revenue priority strategy, a peak-to-valley power policy, and a ladder At least one of the electrical mode policies.
  • the method further includes dividing the voltage level of the system according to different load voltages across the voltage carrier module.
  • the method further includes: the device detecting a communication state of the bus before transmitting the data; waiting for the preset time according to the device priority when detecting that the communication state of the bus is busy, continuing after waiting for the preset time Send data until the data is successfully sent to the bus.
  • the method further includes: the device is configured to send the network address of the device to be controlled and the control data to the bus; wherein the control data is used to implement control of the device to be controlled.
  • the device performs data interaction with other devices in the DC microgrid system based on a no-master-slave relationship communication manner.
  • the method further includes: the device sending off-network information to other devices in the system, and leaving the network after being confirmed by other devices.
  • the method further includes: the interaction terminal monitors each device in the system and displays information of each device.
  • the networking process and the data sharing communication are realized by the power carrier communication in the DC microgrid system, and the data is driven, the device is the object, the non-master communication mode is realized, and the devices in the system realize the dynamic network access.
  • Off-grid realize independent coordination between various devices in the DC microgrid system, effectively improve system real-time and flexibility
  • FIG. 1A is a structural block diagram of an embodiment of a DC microgrid system provided by the present disclosure
  • FIG. 1B is a structural block diagram of another embodiment of a DC microgrid system provided by the present disclosure
  • FIG. 2 is a block diagram of still another embodiment of a DC microgrid system provided by the present disclosure.
  • FIG. 3 is a schematic diagram of a communication network architecture of still another embodiment of a DC microgrid system provided by the present disclosure
  • FIG. 4 is a flow chart of one embodiment of a communication method of a DC microgrid system provided by the present disclosure.
  • FIG. 1A is a structural block diagram of an embodiment of a DC microgrid system according to the present disclosure.
  • the system is based on power carrier communication, and each load is connected by a power line.
  • the system includes at least an energy controller 101, an A plurality of devices 102, which may be powered devices or the like.
  • the energy controller 101 is coupled to the device 102 for assigning a network address to the device 102 upon receipt of the network entry request from the device 102.
  • the device 102 is registered in the network according to the network address; the device 102 is further configured to perform data interaction with other devices in the system based on the communication mode without the master-slave relationship.
  • the system further includes: an interaction terminal 103 connected to the energy controller 101 for monitoring each device 102 in the system and displaying information of each device 102; After receiving the control request of the user, it is forwarded to the energy controller 101; after receiving the control request forwarded by the interactive terminal 103, the energy controller 101 implements control of the device 102.
  • the networking process and data sharing communication are realized by power carrier communication, and the data is driven, and the device is used as the object to realize the non-master communication mode, and the devices in the system realize dynamic network access, off-grid, and realize DC.
  • the autonomous coordinated operation between the various devices in the microgrid system effectively improves the real-time and flexibility of the system.
  • FIG. 2 is a structural diagram of still another embodiment of a DC microgrid system provided by the present disclosure. As shown in FIG. 2, the system is mainly composed of the following loads: an energy controller 201, power devices 203, 204, 205, 206, an interactive terminal 202, and a variable current. 213, photovoltaic DC/DC 215, energy storage DC/DC 208, 209, 212, cross voltage carrier module 210, and the like. The following is introduced separately.
  • the energy controller 201 determines whether to allow the powered devices 203, 204, 205, and 206 to enter the network according to the device information reported by the powered devices 203, 204, 205, and 206, thereby performing identity verification on the incoming devices of the powered devices 203, 204, 205, and 206 to ensure system security. After the electrical equipment 203, 204, 205, 206 is registered in the network, the power consumption information is reported and reported to the bus in time when the power consumption information changes.
  • the DC microgrid system can implement the power consumption information of the device through the external metering module. collection.
  • the converter 213 is connected to the power grid 214, and the power consumption information of each power device 203, 204, 205, 206 is obtained through the bus, and the power output of the power grid 214 is adjusted in real time according to the system operation power demand. Thereby saving energy, avoiding waste of electricity, and realizing the balance of power consumption of the system.
  • the photovoltaic DC/DC 215 is connected to the photovoltaic power generation module 217 (also connected to the photovoltaic power generation module 217 through the combiner box 216), and the power consumption information of each power consumption device 203, 204, 205, 206 is obtained through the bus, and the photovoltaic power generation module 217 is adjusted in real time according to the system operation power demand. Power output. Thereby saving energy, avoiding waste of electricity, and realizing the balance of power consumption of the system.
  • the energy storage DC/DC 212 is connected to the energy storage battery 211, and the power consumption information of each power consumption device 203, 204, 205, 206 is obtained through the bus, and the power output of the energy storage battery 211 is adjusted in real time according to the system operation power demand. Thereby saving energy, avoiding waste of electricity, and realizing the balance of power consumption of the system.
  • the voltage across voltage carrier module 210 divides the voltage levels of the system according to different load voltages. As shown in FIG. 2, two voltage levels are divided across the voltage carrier module 210. Loads involving different voltage levels pass directly across the voltage carrier module 210 to meet the multi-voltage levels of the system, enabling connectivity throughout the system.
  • the energy controller 201 can also obtain power consumption information, system power generation information, and system energy storage information of each power consumption device 203, 204, 205, 206, and the converter 213, the photovoltaic DC/DC 215, the energy storage DC/DC 208, 209, 212 according to the energy control strategy.
  • Each of the powered devices 203, 204, 205, 206 performs scheduling. For example, when the photovoltaic power generation is insufficient, the balance of the power consumption of the system is achieved by adjusting the states of the power devices 203, 204, 205, and 206.
  • the energy control strategy includes at least one of an economic priority strategy, a revenue priority strategy, a peak-to-valley power policy, and a ladder power mode strategy.
  • FIG. 3 is a communication network architecture diagram of still another embodiment of a DC microgrid system provided by the present disclosure, and FIG. 3 schematically shows an interaction terminal 302, an energy manager 301, a converter 303, an energy storage DC/DC 304, The architectural relationship between the energy storage battery 305, the powered device 306, and the powered device 307.
  • off-grid information the system itself confirms the electrical equipment - exits the system data interaction - completes off-grid.
  • the master-slave relationship communication mode is adopted, the power device 306 and the power device 307 are driven by data, and data is shared, and data is obtained from the bus according to its own requirements. Reliable operation. When its own state data changes, it will report to the bus in a timely manner. Any node on the system network can effectively obtain the corresponding information.
  • the power device 306 and the power device 307 on the bus need to transmit data to the outside, the power device 306 and the power device 307 detect the communication state of the bus before transmitting the data, and when detecting that the communication state of the bus is busy, according to the device The priority waits for the preset time and then continues to send data until the data is successfully sent to the bus.
  • the network address and the control data of the power device 307 to be controlled are encapsulated and sent to the bus according to the IP address assigned by the system;
  • the data is used to implement control of the powered device 307 to be controlled.
  • the device may voluntarily opt out of the participating system, and the device actively sends off-network information to notify all other devices on the network, and the related device timely clears the information of the off-network device. After being confirmed by other equipment, it is off the net. Thereby achieving the independent and safe off-network of the device.
  • the device accesses the system for the first time, requests the network address from the energy controller, and reports its own device information.
  • the IP address is assigned to the energy manager (for example, the IP address of device 1 is 1, and is unique inside the network)
  • the network registration is performed.
  • the energy controller allows permission to access the network based on the identity of the device and the characteristics of the system. After the device is connected to the network, data interaction with other devices in the entire system is allowed.
  • the interactive terminal in the system monitors the device registration information on the power line in the system in real time, and dynamically displays related information of each device.
  • the user sets and controls the devices connected to the network through the interactive terminal.
  • the interactive terminal provides the system power generation, power consumption information and system running status in real time according to the device energy information.
  • the user can control the device through the interactive terminal.
  • the device reports its own power consumption information (U, I, P, Q) and status in real time, providing an effective basis for system operation.
  • FIG. 4 is a flowchart of an embodiment of a communication method of a DC microgrid system according to the present disclosure. As shown in FIG. 4, the method includes the following steps:
  • Step S401 after receiving the network application of the device, the energy controller allocates a network address to the device;
  • Step S402 the device registers with the network according to the network address, and performs data interaction with other devices in the DC microgrid system based on the communication mode without the master-slave relationship.
  • the present embodiment is based on a DC microgrid system, and realizes a networking process and data sharing communication through power carrier communication, and drives the data as a device to implement a non-master communication mode, and the devices in the system implement dynamic network access and off-grid. Autonomous coordinated operation between various devices in the DC microgrid system is realized, which effectively improves the real-time performance and flexibility of the system.
  • the method further includes: the interactive terminal forwards the control request of the user to the energy controller after receiving the control request. After receiving the control request forwarded by the interactive terminal, the energy controller implements control of the device.
  • the energy controller determines whether the device is allowed to access the network according to the device information reported by the device. Therefore, the device is authenticated to the network to ensure system security.
  • the device reports its own power consumption information, or the system collects the power consumption information of each device through an external metering module; the converter obtains the power consumption information of each device through the bus, and adjusts the power grid in real time according to the system running power demand.
  • the energy storage DC/DC obtains the power consumption information of each device through the bus, and runs according to the system.
  • the power demand adjusts the power output of the energy storage battery in real time. Based on this, energy can be saved, power waste can be avoided, and the power balance of the system can be realized.
  • the energy controller obtains the power consumption information, system power generation information and system energy storage information of each device, and according to the energy control strategy, the converter, the photovoltaic DC/DC, the energy storage DC/DC, and each The equipment is scheduled; wherein the energy control strategy includes at least: an economic priority strategy, a revenue priority strategy, a peak-to-valley power consumption strategy, and a ladder power consumption mode strategy.
  • the entire system communication link is opened, and the voltage level of the system is divided according to different load voltages across the voltage carrier module.
  • the device detects the communication state of the bus before transmitting the data; when it detects that the communication state of the bus is busy, waits for the preset time according to the device priority, and then continues to send data until the data is successfully sent to the bus. .
  • the embodiment provides the following optional implementation manner: the device encapsulates the network address and control data of the device to be controlled, and sends the data to the bus; wherein, the control data is used to implement the device to be controlled. control.
  • the device sends off-network information to other devices in the system, and is disconnected from the network after being confirmed by other devices. Based on this, the devices in the system realize dynamic network access and off-grid, and realize the autonomous coordinated operation between the devices in the DC microgrid system.
  • the interactive terminal in this embodiment monitors each device in the system and displays information of each device. This makes it easy for the user to grasp the operating status and power usage status of the device.
  • the present disclosure is based on a DC microgrid system, realizes its networking process and data sharing communication through power carrier communication, drives data, drives the device as a target, implements a masterless communication mode, and crosses the voltage.
  • Data transmission open the entire system communication link, can achieve autonomous coordinated operation between DC micro-network system equipment, effectively improve the system real-time and flexibility, and achieve effective management of equipment in the system.
  • the methods and systems of the present disclosure may be implemented in a number of ways.
  • the methods and systems of the present disclosure may be implemented in software, hardware, firmware, or any combination of software, hardware, or firmware.
  • the above-described sequence of steps for the method is for illustrative purposes only, and the steps of the method of the present disclosure are not limited to the order specifically described above unless otherwise specifically stated.
  • the present disclosure may also be embodied as programs recorded in a recording medium, the programs including machine readable instructions for implementing a method in accordance with the present disclosure.
  • the present disclosure also covers a recording medium storing a program for executing the method according to the present disclosure.

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Power Engineering (AREA)
  • Direct Current Feeding And Distribution (AREA)
  • Remote Monitoring And Control Of Power-Distribution Networks (AREA)

Abstract

本公开提供一种直流微电网系统及其通信方法。其中，该系统基于电力载波通信，至少包括能源控制器、至少一个设备；所述能源控制器，与所述设备相连接，用于在接收到所述设备的入网申请后，向该设备分配网络地址；所述设备，用于根据所述网络地址注册入网；所述设备还用于基于无主从关系通信方式与所述系统中的其他设备进行数据交互。通过本公开，在直流微网系统中通过电力载波通信实现其组网过程和数据共享通信，以数据为驱动，以设备为对象，实现无主通信方式，系统中的设备实现动态入网、离网，实现直流微电网系统中各个设备间的自主协调运行，有效提高系统实时性及灵活性。

Description

直流微电网系统及其通信方法
相关申请的交叉引用
本申请是以CN申请号为201710765138.4，申请日为2017年8月30日的申请为基础，并主张其优先权，该CN申请的公开内容在此作为整体引入本申请中。
技术领域
本公开涉及电力技术领域，尤其涉及一种直流微电网系统及其通信方法。
背景技术
在相关的微电网系统中，其通信系统架构主要以RS485等主从式总线架构为主，其方案问题点主要是在系统节点数多的情况下，其主从式结构很难保证系统实时性。另外，整个系统扩展性比较差，系统涉及布线、安装等。在整个微电网系统中，设备基本没有智能化，也使得整个系统不够灵活。同时，在目前大多数微电网系统中，基本上属于单一电压等级，不能适用于不同的负载电压。
发明内容
本公开的一个或多个实施例提供一种直流微电网系统及其通信方法，能够解决相关技术中微电网系统实时性和灵活性差的问题。
本公开的实施例提供了一种直流微电网系统，其中，该系统基于电力载波通信，至少包括能源控制器、至少一个设备；所述能源控制器，与所述设备相连接，用于在接收到所述设备的入网申请后，向该设备分配网络地址；所述设备，用于根据所述网络地址注册入网。
可选地，所述系统还包括：交互终端，与所述能源控制器相连接，用于监控所述系统中的各个所述设备并显示各个所述设备的信息；还用于在接收用户的控制请求后，将此控制请求转发至所述能源控制器；所述能源控制器，用于在接收到所述交互终端转发的控制请求后，实现对设备的控制。
可选地，所述能源控制器，还用于根据所述设备上报的设备信息，判断是否允许该设备入网。
可选地，所述设备，用于上报自身的用电信息，在自身的用电信息发生变化时实时上 报至总线。
可选地，所述系统还包括：变流器、电网、光伏DC/DC、光伏发电模块、储能DC/DC、储能电池；所述变流器，用于通过总线获取各个所述设备的用电信息，根据系统运行电量需求实时调整所述电网的功率输出；所述光伏DC/DC，用于通过总线获取各个所述设备的用电信息，根据系统运行电量需求实时调整所述光伏发电模块的功率输出；所述储能DC/DC，用于通过总线获取各个所述设备的用电信息，根据系统运行电量需求实时调整所述储能电池的功率输出。
可选地，所述能源控制器，用于获取各个所述设备的用电信息、系统发电信息和系统储能信息，按照能源控制策略对所述变流器、所述光伏DC/DC、所述储能DC/DC、各个设备进行调度；其中，所述能源控制策略包括：经济优先策略、收益优先策略、峰谷用电策略、阶梯用电模式策略中的至少一个。
可选地，所述系统还包括：跨电压载波模块，用于根据不同的负载电压划分所述系统的电压等级。
可选地，所述设备，用于在发送数据之前检测总线的通信状态，在检测到总线的通信状态为忙时，按照设备优先级发送数据，直至数据成功发送至总线。
可选地，所述设备，用于将待控制设备的网络地址与控制数据封装，发送至总线；其中，所述控制数据用于实现对待控制设备的控制。
可选地，所述设备，用于基于无主从关系通信方式与所述系统中的其他设备进行数据交互
可选地，所述设备，用于向所述系统中的其他设备发送离网信息，在得到其他设备确认后离网。
可选地，所述系统还包括：外部计量模块，用于采集系统中各个设备的用电信息。
本公开的实施例提供了一种直流微电网系统的通信方法，所述系统基于电力载波通信，其中，该方法包括：能源控制器接收到设备的入网申请后，向所述设备分配网络地址；所述设备根据所述网络地址注册入网。
可选地，所述方法还包括：交互终端接收用户的控制请求后将此控制请求转发至所述能源控制器；所述能源控制器接收到所述交互终端转发的控制请求后，实现对设备的控制。
可选地，所述设备根据所述网络地址注册入网之前，所述方法还包括：所述能源控制器根据所述设备上报的设备信息，判断是否允许该设备入网。
可选地，所述方法还包括：所述设备上报自身的用电信息，或者，所述系统通过外部 计量模块采集各个所述设备的用电信息；变流器通过总线获取各个所述设备的用电信息，根据系统运行电量需求实时调整电网的功率输出；光伏DC/DC通过总线获取各个所述设备的用电信息，根据系统运行电量需求实时调整光伏发电模块的功率输出；储能DC/DC通过总线获取各个所述设备的用电信息，根据系统运行电量需求实时调整储能电池的功率输出。
进一步地，所述设备上报自身的用电信息之后，所述方法还包括：能源控制器获取各个所述设备的用电信息、系统发电信息和系统储能信息，按照能源控制策略对所述变流器、所述光伏DC/DC、所述储能DC/DC、各个所述设备进行调度；其中，所述能源控制策略包括：经济优先策略、收益优先策略、峰谷用电策略、阶梯用电模式策略中的至少一个。
可选地，所述方法还包括：跨电压载波模块根据不同的负载电压划分所述系统的电压等级。
可选地，所述方法还包括：所述设备在发送数据之前检测总线的通信状态；在检测到总线的通信状态为忙时，按照设备优先级等待预设时间，在等待预设时间后继续发送数据，直至数据成功发送至总线。
可选地，所述方法还包括：所述设备将待控制设备的网络地址与控制数据封装，发送至总线；其中，所述控制数据用于实现对待控制设备的控制。
可选地，所述设备基于无主从关系通信方式与所述直流微电网系统中的其他设备进行数据交互。
可选地，所述方法还包括：所述设备向所述系统中的其他设备发送离网信息，在得到其他设备确认后离网。
可选地，所述方法还包括：所述交互终端监控所述系统中的各个设备并显示各个设备的信息。
应用本公开的技术方案，在直流微网系统中通过电力载波通信实现其组网过程和数据共享通信，以数据为驱动，以设备为对象，实现无主通信方式，系统中的设备实现动态入网、离网，实现直流微电网系统中各个设备间的自主协调运行，有效提高系统实时性及灵活性
附图说明
为了更清楚地说明本公开实施例或相关技术中的技术方案，下面将对实施例或相关技术描述中所需要使用的附图作简单地介绍，显而易见地，下面描述中的附图仅仅是本公开 的一些实施例，对于本领域普通技术人员来讲，在不付出创造性劳动性的前提下，还可以根据这些附图获得其他的附图。
图1A为本公开提供的直流微电网系统的一个实施例的结构框图；图1B为本公开提供的直流微电网系统的另一个实施例的结构框图；
图2为本公开提供的直流微电网系统的又一个实施例的架构图；
图3为本公开提供的直流微电网系统的再一个实施例的通信网络架构图；
图4为本公开提供的直流微电网系统的通信方法的一个实施例的流程图。
具体实施方式
下面将结合本公开实施例中的附图，对本公开实施例中的技术方案进行清楚、完整地描述，显然，所描述的实施例仅仅是本公开一部分实施例，而不是全部的实施例。基于本公开中的实施例，本领域普通技术人员在没有做出创造性劳动前提下所获得的所有其他实施例，都属于本公开保护的范围。
图1A为本公开提供的直流微电网系统的一个实施例的结构框图，该系统基于电力载波通信，各个负载通过电力线相连接，如图1A所示，该系统至少包括能源控制器101、一个或多个设备102，设备102可以为用电设备等。
能源控制器101与设备102相连接，用于在接收到设备102的入网申请后，向该设备102分配网络地址。设备102根据网络地址注册入网；设备102还用于基于无主从关系通信方式与系统中的其他设备进行数据交互。
如图1B所示，为了实现用户对设备的控制，系统还包括：交互终端103，与能源控制器101相连接，用于监控系统中的各个设备102并显示各个设备102的信息；还用于接收用户的控制请求后转发至能源控制器101；能源控制器101接收到交互终端103转发的控制请求后，实现对设备102的控制。
基于上述直流微电网系统，通过电力载波通信实现其组网过程和数据共享通信，以数据为驱动，以设备为对象，实现无主通信方式，系统中的设备实现动态入网、离网，实现直流微电网系统中各个设备间的自主协调运行，有效提高系统实时性及灵活性。
图2为本公开提供的直流微电网系统的又一个实施例的架构图，如图2所示，该系统主要由以下负载组成：能源控制器201、用电设备203,204,205,206、交互终端202、变流器213、光伏DC/DC 215、储能DC/DC 208,209,212、跨电压载波模块210等。下面分别进行介绍。
能源控制器201根据用电设备203,204,205,206上报的设备信息，判断是否允许该用电设备203,204,205,206入网，从而对用电设备203,204,205,206入网进行身份验证，保证系统安全性。用电设备203,204,205,206注册入网后，上报自身的用电信息，在自身的用电信息发生变化时及时上报至总线。当然，如果用电设备203,204,205,206中的一个或多个自身不具备计量功能，为避免影响对于系统用电需求的有效统计及预测，直流微电网系统可以通过外部计量模块来实现设备的用电信息的采集。
变流器213与电网214连接，通过总线获取各个用电设备203,204,205,206的用电信息，根据系统运行电量需求实时调整电网214的功率输出。从而节省能源，避免用电浪费，实现系统的用电平衡。
光伏DC/DC 215与光伏发电模块217连接(也可以通过汇流箱216与光伏发电模块217连接)，通过总线获取各个用电设备203,204,205,206的用电信息，根据系统运行电量需求实时调整光伏发电模块217的功率输出。从而节省能源，避免用电浪费，实现系统的用电平衡。
储能DC/DC 212与储能电池211连接，通过总线获取各个用电设备203,204,205,206的用电信息，根据系统运行电量需求实时调整储能电池211的功率输出。从而节省能源，避免用电浪费，实现系统的用电平衡。
跨电压载波模块210根据不同的负载电压划分系统的电压等级，如图2所示，跨电压载波模块210分出两个电压等级。涉及不同电压等级的负载直接通过跨电压载波模块210，从而满足系统的多电压等级，实现整个系统通信的连通性。
能源控制器201还可以获取各个用电设备203,204,205,206的用电信息、系统发电信息和系统储能信息，按照能源控制策略对变流器213、光伏DC/DC 215、储能DC/DC208,209,212、各个用电设备203,204,205,206进行调度。例如光伏发电不足时，通过调整用电设备203,204,205,206的状态，达到系统用电功率的平衡。其中，能源控制策略包括：经济优先策略、收益优先策略、峰谷用电策略、阶梯用电模式策略中的至少一种。
下面分两大部分对直流微电网系统的工作进行介绍。
(1)系统组网及通信过程
图3为本公开提供的直流微电网系统的再一个实施例的通信网络架构图，图3示意性的展示了交互终端302、能源管理器301、变流器303、储能DC/DC 304、储能电池305、用电设备306、用电设备307之间的架构关系。
用电设备入网流程：
上报信息——注册入网——申请地址——能源控制器分配地址——完成入网。
用电设备离网流程：
上报离网信息——系统各个用电设备自身确认——退出系统数据交互——完成离网。
对于系统中的用电设备306、用电设备307通信，采用无主从关系通信方式，用电设备306、用电设备307以数据为驱动，数据共享，根据自身需求，从总线上获取数据实现可靠运行。当自身的状态数据改变时，及时主动向总线上报。系统网络上的任何一个节点都能够有效获取相应的信息。总线上的用电设备306、用电设备307需要往外发送数据时，用电设备306、用电设备307在发送数据之前检测总线的通信状态，在检测到总线的通信状态为忙时，按照设备优先级等待预设时间，之后继续发送数据，直至数据成功发送至总线。
如果用电设备306需要对系统中另外一个用电设备307进行控制，则按照系统分配好的IP地址，将待控制的用电设备307的网络地址与控制数据封装，发送至总线；其中，控制数据用于实现对待控制的用电设备307的控制。从而实现系统中用电设备306、用电设备307之间的相互控制。
在一个实施例中，在系统运行过程中，设备可以自主选择退出参与系统运行，这时设备主动发送离网信息告知网络上的其它所有设备，相关设备及时清除离网设备的信息，该设备在得到其他设备确认后离网。从而实现设备的自主安全离网。
(2)系统运行过程
在直流微电网系统的运行过程中，设备首次接入系统，向能源控制器申请网络地址，并上报自身设备信息。从能源管理器获取为其分配的IP地址(例如设备1的IP地址为1，且在网络内部唯一)之后，进行入网注册。能源控制器根据设备身份及系统特点，对是否允许其入网进行许可。设备入网后，才允许与整个系统中的其他设备进行数据交互。
系统中的交互终端实时监控系统中电力线上的设备注册信息，并动态显示各个设备的相关信息。用户通过交互终端，对入网的设备进行设置及控制，同时，交互终端根据设备能源信息，实时提供系统发电、用电信息及系统运行状态。
设备入网后，用户可以通过交互终端对设备进行控制，同时设备实时将自己的用电信息(U、I、P、Q)及状态上报，为系统运行提供有效依据。
图4为本公开提供的直流微电网系统的通信方法的一个实施例的流程图，如图4所示，该方法包括以下步骤：
步骤S401，能源控制器接收到设备的入网申请后，向设备分配网络地址；
步骤S402，设备根据网络地址注册入网，基于无主从关系通信方式与直流微电网系统中的其他设备进行数据交互。
本实施例基于直流微电网系统，通过电力载波通信实现其组网过程和数据共享通信，以数据为驱动，以设备为对象，实现无主通信方式，系统中的设备实现动态入网、离网，实现直流微电网系统中各个设备间的自主协调运行，有效提高系统实时性及灵活性。
为了实现用户对设备的控制，上述方法还包括：交互终端接收用户的控制请求后将其转发至能源控制器。能源控制器接收到交互终端转发的控制请求后，实现对设备的控制。
设备根据网络地址注册入网之前，能源控制器根据设备上报的设备信息，判断是否允许该设备入网。从而对设备入网进行身份验证，保证系统安全性。
在本实施例中，设备上报自身的用电信息，或者，系统通过外部计量模块采集各个设备的用电信息；变流器通过总线获取各个设备的用电信息，根据系统运行电量需求实时调整电网的功率输出；光伏DC/DC通过总线获取各个设备的用电信息，根据系统运行电量需求实时调整光伏发电模块的功率输出；储能DC/DC通过总线获取各个设备的用电信息，根据系统运行电量需求实时调整储能电池的功率输出。基于此，能够节省能源，避免用电浪费，实现系统的用电平衡。
为了进一步保证系统的用电平衡，能源控制器获取各个设备的用电信息、系统发电信息和系统储能信息，按照能源控制策略对变流器、光伏DC/DC、储能DC/DC、各个设备进行调度；其中，能源控制策略至少包括：经济优先策略、收益优先策略、峰谷用电策略、阶梯用电模式策略。
为了满足系统的多电压等级，打通整个系统通信链路，跨电压载波模块根据不同的负载电压划分系统的电压等级。
在设备的数据交互过程中，设备在发送数据之前检测总线的通信状态；在检测到总线的通信状态为忙时，按照设备优先级等待预设时间，之后继续发送数据，直至数据成功发送至总线。
为了实现系统中设备之间的相互控制，本实施例提供了以下可选实施方式：设备将待控制设备的网络地址与控制数据封装，发送至总线；其中，控制数据用于实现对待控制设备的控制。
为了实现设备的自主安全离网，本实施例提供了以下可选实施方式：设备向系统中的其他设备发送离网信息，在得到其他设备确认后离网。基于此，系统中的设备实现动态入网、离网，实现直流微电网系统中各个设备间的自主协调运行。
本实施例中的交互终端监控系统中的各个设备并显示各个设备的信息。从而便于用户掌握设备的运行状态和用电状态。
从以上的描述中可知，本公开基于直流微电网系统，通过电力载波通信实现其组网过程和数据共享通信，以数据为驱动，以设备为对象，实现无主通信方式，，并通过跨电压数据传输，打通整个系统通信链路，能够很好的实现直流微网系统设备间的自主协调运行，有效提高系统实时性及灵活性，实现对系统中设备的有效管理。显然，本领域的技术人员可以对本公开实施例进行各种改动和变型而不脱离本公开的精神和范围。这样，倘若本公开的这些修改和变型属于本公开权利要求及其等同技术的范围之内，则本公开也意图包含这些改动和变型在内。
可能以许多方式来实现本公开的方法和系统。例如，可通过软件、硬件、固件或者软件、硬件、固件的任何组合来实现本公开的方法和系统。用于方法的步骤的上述顺序仅是为了进行说明，本公开的方法的步骤不限于以上具体描述的顺序，除非以其它方式特别说明。此外，在一些实施例中，还可将本公开实施为记录在记录介质中的程序，这些程序包括用于实现根据本公开的方法的机器可读指令。因而，本公开还覆盖存储用于执行根据本公开的方法的程序的记录介质。
本公开的描述是为了示例和描述起见而给出的，而并不是无遗漏的或者将本公开限于所公开的形式。很多修改和变化对于本领域的普通技术人员而言是显然的。选择和描述实施例是为了更好说明本公开的原理和实际应用，并且使本领域的普通技术人员能够理解本公开从而设计适于特定用途的带有各种修改的各种实施例。

Claims (23)

  1. 一种直流微电网系统，所述系统基于电力载波通信，至少包括能源控制器、至少一个设备；
    所述能源控制器，与所述设备相连接，用于在接收到所述设备的入网申请后，向该设备分配网络地址；
    所述设备，用于根据所述网络地址注册入网。
  2. 根据权利要求1所述的系统，所述系统还包括：
    交互终端，与所述能源控制器相连接，用于监控所述系统中的各个所述设备并显示各个所述设备的信息；还用于在接收用户的控制请求后，将此控制请求转发至所述能源控制器；
    所述能源控制器，用于在接收到所述交互终端转发的控制请求后，实现对设备的控制。
  3. 根据权利要求1所述的系统，其中，
    所述能源控制器，还用于根据所述设备上报的设备信息，判断是否允许该设备入网。
  4. 根据权利要求1所述的系统，其特征在于，
    所述设备，用于上报自身的用电信息，在自身的用电信息发生变化时实时上报至总线。
  5. 根据权利要求4所述的系统，所述系统还包括：变流器、电网、光伏DC/DC、光伏发电模块、储能DC/DC、储能电池；
    所述变流器，用于通过总线获取各个所述设备的用电信息，根据系统运行电量需求实时调整所述电网的功率输出；
    所述光伏DC/DC，用于通过总线获取各个所述设备的用电信息，根据系统运行电量需求实时调整所述光伏发电模块的功率输出；
    所述储能DC/DC，用于通过总线获取各个所述设备的用电信息，根据系统运行电量需求实时调整所述储能电池的功率输出。
  6. 根据权利要求5所述的系统，其中，
    所述能源控制器，用于获取各个所述设备的用电信息、系统发电信息和系统储能信息，按照能源控制策略对所述变流器、所述光伏DC/DC、所述储能DC/DC、各个所述设备进行调度；其中，所述能源控制策略包括：经济优先策略、收益优先策略、峰谷用电策略、阶梯用电模式策略中的至少一个。
  7. 根据权利要求1所述的系统，所述系统还包括：
    跨电压载波模块，用于根据不同的负载电压划分所述系统的电压等级。
  8. 根据权利要求1所述的系统，其中，
    所述设备，用于在发送数据之前检测总线的通信状态，在检测到总线的通信状态为忙时，按照设备优先级发送数据，直至数据成功发送至总线。
  9. 根据权利要求1所述的系统，其中，
    所述设备，用于将待控制设备的网络地址与控制数据封装，发送至总线；其中，所述控制数据用于实现对待控制设备的控制。
  10. 根据权利要求1所述的系统，其中，
    所述设备，用于基于无主从关系通信方式与所述系统中的其他设备进行数据交互。
  11. 根据权利要求1所述的系统，其中，
    所述设备，用于向所述系统中的其他设备发送离网信息，在得到其他设备确认后离网。
  12. 根据权利要求1所述的系统，所述系统还包括：
    外部计量模块，用于采集系统中各个设备的用电信息。
  13. 一种直流微电网系统的通信方法，所述系统基于电力载波通信，所述方法包括：
    能源控制器接收到设备的入网申请后，向所述设备分配网络地址；
    所述设备根据所述网络地址注册入网。
  14. 根据权利要求13所述的方法，所述方法还包括：
    交互终端接收用户的控制请求后将此控制请求转发至所述能源控制器；
    所述能源控制器在接收到所述交互终端转发的控制请求后，实现对所述设备的控制。
  15. 根据权利要求13所述的方法，其中，所述设备根据所述网络地址注册入网之前，所述方法还包括：
    所述能源控制器根据所述设备上报的设备信息，判断是否允许该设备入网。
  16. 根据权利要求13所述的方法，所述方法还包括：
    所述设备上报自身的用电信息，或者，所述系统通过外部计量模块采集各个所述设备的用电信息；
    变流器通过总线获取各个所述设备的用电信息，根据系统运行电量需求实时调整电网的功率输出；
    光伏DC/DC通过总线获取各个所述设备的用电信息，根据系统运行电量需求实时调整光伏发电模块的功率输出；
    储能DC/DC通过总线获取各个所述设备的用电信息，根据系统运行电量需求实时调 整储能电池的功率输出。
  17. 根据权利要求16所述的方法，所述设备上报自身的用电信息之后，所述方法还包括：
    所述能源控制器获取各个所述设备的用电信息、系统发电信息和系统储能信息，按照能源控制策略对所述变流器、所述光伏DC/DC、所述储能DC/DC、各个所述设备进行调度；其中，所述能源控制策略包括：经济优先策略、收益优先策略、峰谷用电策略、阶梯用电模式策略中的至少一个。
  18. 根据权利要求13所述的方法，所述方法还包括：
    跨电压载波模块根据不同的负载电压划分所述系统的电压等级。
  19. 根据权利要求13所述的方法，所述方法还包括：
    所述设备在发送数据之前检测总线的通信状态；
    所述设备在检测到总线的通信状态为忙时，按照设备优先级等待预设时间在等待预设时间后继续发送数据，直至数据成功发送至总线。
  20. 根据权利要求13所述的方法，所述方法还包括：
    所述设备将待控制设备的网络地址与控制数据封装，发送至总线；其中，所述控制数据用于实现对待控制设备的控制。
  21. 根据权利要求13所述的方法，所述方法还包括：
    所述设备基于无主从关系通信方式与所述直流微电网系统中的其他设备进行数据交互。
  22. 根据权利要求21所述的方法，所述方法还包括：
    所述设备向所述系统中的其他设备发送离网信息，在得到其他设备确认后离网。
  23. 根据权利要求13所述的方法，其特征在于，所述方法还包括：
    所述交互终端监控所述系统中的各个设备并显示各个设备的信息。
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