CN113193776B - MMC Structure and Control Method Based on Synchronous Handshake Protocol - Google Patents
MMC Structure and Control Method Based on Synchronous Handshake Protocol Download PDFInfo
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M7/00—Conversion of AC power input into DC power output; Conversion of DC power input into AC power output
- H02M7/42—Conversion of DC power input into AC power output without possibility of reversal
- H02M7/44—Conversion of DC power input into AC power output without possibility of reversal by static converters
- H02M7/48—Conversion of DC power input into AC power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
- H02M7/483—Converters with outputs that each can have more than two voltages levels
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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
- H02J1/00—Circuit arrangements for DC mains or DC distribution networks
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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
- H02J13/00001—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 the display of information or by user interaction, e.g. supervisory control and data acquisition systems [SCADA] or graphical user interfaces [GUI]
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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
- H02J13/00002—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
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J13/00—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network
- H02J13/00006—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network characterised by information or instructions transport means between the monitoring, controlling or managing units and monitored, controlled or operated power network element or electrical equipment
- H02J13/00016—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network characterised by information or instructions transport means between the monitoring, controlling or managing units and monitored, controlled or operated power network element or electrical equipment using a wired telecommunication network or a data transmission bus
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M7/00—Conversion of AC power input into DC power output; Conversion of DC power input into AC power output
- H02M7/42—Conversion of DC power input into AC power output without possibility of reversal
- H02M7/44—Conversion of DC power input into AC power output without possibility of reversal by static converters
- H02M7/48—Conversion of DC power input into AC power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
- H02M7/53—Conversion of DC power input into AC power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal
- H02M7/537—Conversion of DC power input into AC power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only, e.g. single switched pulse inverters
- H02M7/5387—Conversion of DC power input into AC power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only, e.g. single switched pulse inverters in a bridge configuration
- H02M7/53871—Conversion of DC power input into AC power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only, e.g. single switched pulse inverters in a bridge configuration with automatic control of output voltage or current
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Abstract
Description
技术领域technical field
本发明涉及电力系统技术领域，具体地，涉及一种基于同步握手协议的MMC结构及控制方法。The present invention relates to the technical field of power systems, in particular to an MMC structure and control method based on a synchronous handshake protocol.
背景技术Background technique
随着电动汽车直流充电桩、通讯设施等直流负载，特别是大型互联网数据中心的建立，人们对直流供电系统的需要也日益增加。现有的中低压直流配电系统的直流侧电压通常比较高，一般为3-10kV，不适于直流负载的直接相连，现阶段往往是将其转换为380V/220V家用电后再对其逆变，以适用于直流负载的电压等级，会造成电能的浪费。With the establishment of DC loads such as electric vehicle DC charging piles and communication facilities, especially large-scale Internet data centers, people's demand for DC power supply systems is also increasing. The DC side voltage of the existing medium and low voltage DC power distribution system is usually relatively high, generally 3-10kV, which is not suitable for direct connection of DC loads. At this stage, it is often converted into 380V/220V household electricity and then reversed. Change to the voltage level suitable for DC loads, which will cause waste of electric energy.
本发明涉及到的基于模块化多电平换流器(modular multilevel converter，MMC)的结构，可通过改变级联MMC的数量，以适用于中低压直流系统的电压，同时，可根据负载的要求，拥有多等级电压的输出端口，拥有很高的灵活性。The structure based on the modular multilevel converter (MMC) involved in the present invention can be adapted to the voltage of the medium and low voltage DC system by changing the number of cascaded MMCs. , has multi-level voltage output ports, and has high flexibility.
专利文献CN104753043A(申请号：CN201510141886.6)公开了一种具有直流故障穿越能力的混合型多电平换流器及工作方法，该换流器基于错位层叠理论，包括三相桥式整流电路；三相桥式整流电路的每个桥臂均包括相互级联的错位层叠模块、级联双子模块组、半桥型子模块组以及电抗器；故障发生时换流器闭锁前的放电过程是一个已知初始条件的振荡放电过程，闭锁后由于桥臂等效电容值发生变化，当且仅当任何回路状态下桥臂级联电容所提供的反向电压始终大于交流线电压幅值时，利用二极管反相阻断特性使短路电流下降为零，清除直流故障。Patent document CN104753043A (application number: CN201510141886.6) discloses a hybrid multilevel converter with DC fault ride-through capability and its working method. The converter is based on the dislocation stacking theory and includes a three-phase bridge rectifier circuit; Each bridge arm of the three-phase bridge rectifier circuit includes cascaded dislocation laminated modules, cascaded twin sub-module groups, half-bridge sub-module groups and reactors; when a fault occurs, the discharge process before the converter is blocked is a In the oscillation discharge process with known initial conditions, the equivalent capacitance value of the bridge arm changes after blocking, if and only if the reverse voltage provided by the cascaded capacitor of the bridge arm is always greater than the amplitude of the AC line voltage in any loop state, use The reverse blocking characteristic of the diode reduces the short-circuit current to zero and clears the DC fault.
发明内容Contents of the invention
针对现有技术中的缺陷，本发明的目的是提供一种基于同步握手协议的MMC结构及控制方法。Aiming at the defects in the prior art, the object of the present invention is to provide an MMC structure and control method based on the synchronous handshake protocol.
根据本发明提供的基于同步握手协议的MMC结构，包括：集中控制主机和MMC能量变换子模块；The MMC structure based on the synchronous handshake protocol provided by the present invention includes: a centralized control host and an MMC energy conversion sub-module;
所述集中控制主机作为主站进行控制，包括：采样检测电路、RS485通信电路和同步信号发生电路；The centralized control host is controlled as a master station, including: a sampling detection circuit, an RS485 communication circuit and a synchronous signal generation circuit;
所述MMC能量变换子模块作为从站进行控制，包括：MMC全桥控制电路、同步信号接收电路、RS485通信电路和输出接口；The MMC energy conversion sub-module is controlled as a slave station, including: MMC full bridge control circuit, synchronous signal receiving circuit, RS485 communication circuit and output interface;
所述主站的采样检测电路连接从站的输出端口；The sampling detection circuit of the master station is connected to the output port of the slave station;
所述主站的RS485通信电路依次连接从站的RS485通信电路；The RS485 communication circuit of the master station is connected to the RS485 communication circuit of the slave station in turn;
所述主站的同步信号发生电路依次连接从站的同步信号接收电路；The synchronization signal generating circuit of the master station is sequentially connected to the synchronization signal receiving circuit of the slave station;
所述从站的输出端口连接负载；The output port of the slave station is connected to a load;
所述MMC全桥控制电路的输入端连接分压并联电容，MMC全桥控制电路的输出端连接从站的输出端口或与下一级MMC能量变换子模块的MMC全桥控制电路的输出端级联。The input terminal of the MMC full-bridge control circuit is connected with a voltage-dividing parallel capacitor, and the output terminal of the MMC full-bridge control circuit is connected with the output port of the slave station or with the output terminal stage of the MMC full-bridge control circuit of the next-level MMC energy conversion sub-module. couplet.
优选的，所述采样监测电路采样输出端口的输出电压、电流，并进行监测与故障反馈控制。Preferably, the sampling monitoring circuit samples the output voltage and current of the output port, and performs monitoring and fault feedback control.
优选的，所述主站与从站通过握手方式进行通信，通过同步信号保证主站对从站的同时握手，从站对主站依次握手。Preferably, the master station communicates with the slave station through handshaking, and the synchronization signal is used to ensure that the master station shakes hands with the slave stations at the same time, and the slave station shakes hands with the master station in turn.
优选的，所述MMC能量变换子模块级联总数量根据输入直流侧电压等级确定，输出端口由负载类型及其电压等级确定。Preferably, the total number of cascaded MMC energy conversion sub-modules is determined according to the voltage level of the input DC side, and the output port is determined by the load type and its voltage level.
优选的，所述MMC全桥控制电路根据不同的调制策略，输出不同的电压等级与类型。Preferably, the MMC full-bridge control circuit outputs different voltage levels and types according to different modulation strategies.
优选的，所述集中控制主机接收从站发出运行状态信息，同时与云网络/电网平台进行交互，对从站下达控制指令，改变从站的运行状况；Preferably, the centralized control host receives the operation state information sent by the slave station, and at the same time interacts with the cloud network/grid platform, issues control instructions to the slave station, and changes the operation status of the slave station;
所述MMC能量变换子模块通过监测与自身相连分压并联电容上的电压，将其与设定值进行比较，进行自身的闭环控制，保证分压并联电容的电压稳定。The MMC energy conversion sub-module monitors the voltage on the voltage-dividing parallel capacitor connected to itself, compares it with the set value, and performs its own closed-loop control to ensure the voltage stability of the voltage-dividing parallel capacitor.
根据本发明提供的基于同步握手协议的MMC控制方法，包括如下步骤：The MMC control method based on the synchronous handshake protocol provided by the present invention comprises the following steps:
步骤1：依据中低压直流侧电压等级及所连接系统负载的要求，确定MMC能量变换子模块的级联数量以及输出端口的供电方式；Step 1: Determine the cascaded number of MMC energy conversion sub-modules and the power supply mode of the output port according to the voltage level of the medium and low voltage DC side and the requirements of the connected system load;
步骤2：控制系统通电，各从站通过同步握手的方式与主站进行通信，确定各MMC能量变换子模块的调制策略；Step 2: The control system is powered on, and each slave station communicates with the master station through a synchronous handshake to determine the modulation strategy of each MMC energy conversion sub-module;
步骤3：主站向各从站发送同步信号，从站依据调制策略在同步信号下进行工作；Step 3: The master station sends a synchronization signal to each slave station, and the slave stations work under the synchronization signal according to the modulation strategy;
步骤4：主站与从站依据同步握手的方式进行通信，从站依据主站命令进行工作。Step 4: The master station communicates with the slave station according to the synchronous handshake method, and the slave station works according to the command of the master station.
优选的，所述从站的工作方式包括：Preferably, the working mode of the slave station includes:
从站向主站发送故障指令，主站发送故障指令后进行系统报警；The slave station sends a fault command to the master station, and the master station sends a system alarm after sending the fault command;
从站向主站发送正常指令，主站未接收到云网络或电网平台发布的外部指令，则系统继续运行；The slave station sends normal instructions to the master station. If the master station does not receive the external instructions issued by the cloud network or grid platform, the system continues to run;
从站向主站发送正常指令，主站接收到外部指令后从站更新调制策略。The slave station sends a normal command to the master station, and the slave station updates the modulation strategy after the master station receives the external command.
优选的，所述步骤2中的同步握手方式如下：Preferably, the synchronous handshake mode in the step 2 is as follows:
步骤2.1：主站询问地址指令；Step 2.1: The master station inquires about the address command;
步骤2.2：从站接收到询问地址指令，从站依据预分配的地址排序，依次向主站发送指令，若从站未收到指令，则主站提示并预警；Step 2.2: The slave station receives the query address command, and the slave station sorts according to the pre-allocated addresses, and sends commands to the master station in turn. If the slave station does not receive the command, the master station prompts and warns;
步骤2.3：主站再次发送同步指令与调制策略选择指令，命令各从站进入等候状态；Step 2.3: The master station sends the synchronization instruction and the modulation strategy selection instruction again, ordering each slave station to enter the waiting state;
步骤2.4：从站依次发送回应指令，进入等候状态。Step 2.4: The slave station sends response commands one by one and enters the waiting state.
优选的，所述步骤4中的同步握手方式如下：Preferably, the synchronous handshake mode in the step 4 is as follows:
步骤4.1：主站依据从站地址，同时向各从站发送状态询问指令；Step 4.1: The master station sends a status query command to each slave station at the same time according to the address of the slave station;
步骤4.2：各从站接收到主站指令后若从站的工作状态判定为正常，则不向主站发送响应指令，若从站的工作状态判定为不正常，则向主站发送相应指令；Step 4.2: After each slave station receives the command from the master station, if the working status of the slave station is judged to be normal, it will not send a response command to the master station; if the working status of the slave station is judged to be abnormal, it will send a corresponding command to the master station;
步骤4.3：主站向从站发送接收指令完成指令。Step 4.3: The master station sends a receiving instruction completion instruction to the slave station.
与现有技术相比，本发明具有如下的有益效果：Compared with the prior art, the present invention has the following beneficial effects:
(1)本发明能直接将中低压直流侧电压通过多层MMC能量变换子模块级联，与直流负载直接相连；同时，本发明采用模块化结构，灵活性高，操作简便；(1) The present invention can directly cascade the medium and low voltage DC side voltage through multi-layer MMC energy conversion sub-modules, and directly connect with the DC load; at the same time, the present invention adopts a modular structure, which is highly flexible and easy to operate;
(2)本发明既能通过改变级联MMC的数量，以适用于中低压直流系统的电压，同时，可根据负载的要求，拥有多等级电压的输出端口，直接对负载供电；(2) The present invention can not only change the number of cascaded MMCs, but also be suitable for the voltage of medium and low voltage DC systems, and at the same time, according to the requirements of the load, have multi-level voltage output ports to directly supply power to the load;
(3)本发明可通过改变级联MMC的数量，以适用于中低压直流系统的电压，同时，可根据负载的要求，拥有多等级电压的输出端口，拥有很高的灵活性。(3) The present invention can be adapted to the voltage of medium and low voltage DC systems by changing the number of cascaded MMCs. At the same time, it can have multi-level voltage output ports according to the requirements of the load, and has high flexibility.
附图说明Description of drawings
通过阅读参照以下附图对非限制性实施例所作的详细描述，本发明的其它特征、目的和优点将会变得更明显：Other characteristics, objects and advantages of the present invention will become more apparent by reading the detailed description of non-limiting embodiments made with reference to the following drawings:
图1是本发明的MMC结构及控制的结构框图；Fig. 1 is the structural block diagram of MMC structure and control of the present invention;
图2是本发明的控制流程框图说明。Figure 2 is a block diagram illustration of the control flow of the present invention.
具体实施方式Detailed ways
下面结合具体实施例对本发明进行详细说明。以下实施例将有助于本领域的技术人员进一步理解本发明，但不以任何形式限制本发明。应当指出的是，对本领域的普通技术人员来说，在不脱离本发明构思的前提下，还可以做出若干变化和改进。这些都属于本发明的保护范围。The present invention will be described in detail below in conjunction with specific embodiments. The following examples will help those skilled in the art to further understand the present invention, but do not limit the present invention in any form. It should be noted that those skilled in the art can make several changes and improvements without departing from the concept of the present invention. These all belong to the protection scope of the present invention.
实施例：Example:
根据本发明提供的基于同步握手协议的MMC结构，包括集中控制主机和MMC能量变换子模块；所述集中控制主机是作为主站进行控制，包括采样检测电路、RS485通信电路、同步信号发生电路；所述MMC能量变换子模块作为从站进行控制，MMC能量变换子模块包括MMC全桥控制电路、同步信号接收电路、RS485通信电路，输出接口。其中：The MMC structure based on the synchronous handshake protocol provided by the present invention includes a centralized control host and an MMC energy conversion submodule; the centralized control host is controlled as a master station, including a sampling detection circuit, an RS485 communication circuit, and a synchronous signal generation circuit; The MMC energy conversion sub-module is controlled as a slave station, and the MMC energy conversion sub-module includes an MMC full-bridge control circuit, a synchronization signal receiving circuit, an RS485 communication circuit, and an output interface. in:
所述主站采样检测电路连接从站的输出端口。采样监测电路采样输出端口的输出电压、电流，并进行监测与故障反馈控制。The sampling detection circuit of the master station is connected to the output port of the slave station. The sampling monitoring circuit samples the output voltage and current of the output port, and performs monitoring and fault feedback control.
所述主站RS485通信电路依次连接从站RS485通信电路；通信方式为握手方式，通过同步信号，保证主站对从站的同时握手，从站对主站依次握手。The RS485 communication circuit of the master station is connected to the RS485 communication circuit of the slave station in turn; the communication method is a handshake mode, and the synchronization signal is used to ensure that the master station shakes hands with the slave station at the same time, and the slave station shakes hands with the master station in turn.
所述主站同步信号发生电路依次连接从站同步信号接收电路。通过同步信号，保证所有从站的协调自动控制。The synchronization signal generating circuit of the master station is sequentially connected to the synchronization signal receiving circuit of the slave station. Coordinated automatic control of all slave stations is guaranteed through synchronization signals.
所述MMC能量变换子模块级联总数量根据输入直流侧电压等级确定，输出端口由负载类型及其电压等级确定。The total number of cascaded MMC energy conversion sub-modules is determined according to the input DC side voltage level, and the output port is determined by the load type and its voltage level.
所述MMC全桥控制电路输入端连接分压并联电容，输出端连接输出端口或与下一级MMC能量变换子模块的MMC全桥控制电路的输出端级联。MMC全桥控制电路可通过其不同的调制策略，输出不同的电压等级与类型。The input end of the MMC full-bridge control circuit is connected to a voltage-dividing parallel capacitor, and the output end is connected to an output port or cascaded with the output end of the MMC full-bridge control circuit of the next-level MMC energy conversion sub-module. The MMC full-bridge control circuit can output different voltage levels and types through its different modulation strategies.
所述从站同步信号接收电路连接主站同步信号发生电路。The synchronization signal receiving circuit of the slave station is connected to the synchronization signal generating circuit of the master station.
所述输出端口连接负载。The output port is connected with a load.
上述集中控制主机，可接收从站发出运行状态信息，同时还可与云网络/电网平台进行交互，对从站下达控制指令，改变从站的运行状况。The above-mentioned centralized control host can receive the operation status information sent by the slave station, and at the same time, it can also interact with the cloud network/grid platform, issue control instructions to the slave station, and change the operation status of the slave station.
上述MMC能量变换子模块，通过监测与自身相连分压并联电容上的电压，将其与设定值进行比较，进行自身的闭环控制，保证分压并联电容的电压稳定。The above-mentioned MMC energy conversion sub-module monitors the voltage on the voltage-dividing parallel capacitor connected to itself, compares it with the set value, and performs its own closed-loop control to ensure the voltage stability of the voltage-dividing parallel capacitor.
请参阅图1，MMC能量变换子模块为可拆卸模块，依据输出电压等级要求，可级联后运行，也可单独运行。在故障时可进行拆卸而不影响整个供电系统的正常运行，在输出电压类型方面，可以选择不同的控制方式而输出不同的电压类型，通信采用同步握手的方式提高系统运行时通信的安全可靠。Please refer to Figure 1. The MMC energy conversion sub-module is a detachable module. According to the requirements of the output voltage level, it can be operated after cascading or independently. It can be disassembled in the event of a failure without affecting the normal operation of the entire power supply system. In terms of output voltage types, different control methods can be selected to output different voltage types. The communication adopts a synchronous handshake method to improve the safety and reliability of communication during system operation.
具体实现步骤如图2：The specific implementation steps are shown in Figure 2:
S1：依据中低压直流侧电压等级及所连接系统负载的要求，确定MMC能量变换子模块的级联数量以及输出端口的供电方式；S1: Determine the cascaded number of MMC energy conversion sub-modules and the power supply mode of the output port according to the voltage level of the medium and low voltage DC side and the requirements of the connected system load;
S2：控制系统通电，各从站通过同步握手的方式与主站进行通信，确定各MMC能量变换子模块的调制策略；S2: The control system is powered on, and each slave station communicates with the master station through a synchronous handshake to determine the modulation strategy of each MMC energy conversion sub-module;
S3：主站向各从站发送同步信号，从站依据其调制策略在同步信号下进行工作；S3: The master station sends a synchronization signal to each slave station, and the slave station works under the synchronization signal according to its modulation strategy;
S4：主站与从站依据同步握手的方式进行通信，从站依据主站命令进行工作；S4: The master station communicates with the slave station according to the synchronous handshake method, and the slave station works according to the command of the master station;
S5：根据主站指令的不同，从站有以下3种工作方式：S5: According to the different instructions of the master station, the slave station has the following three working modes:
S5.1：从站向主站发送故障指令，主站发送故障指令，系统报警；S5.1: The slave station sends a fault command to the master station, the master station sends a fault command, and the system alarms;
S5.2：从站向主站发送正常指令，主站未接收到云网络或电网平台发布的外部指令，系统继续运行；S5.2: The slave station sends normal instructions to the master station, the master station does not receive the external instructions issued by the cloud network or grid platform, and the system continues to run;
S5.3：从站向主站发送正常指令，主站接收到外部指令，从站更新调制策略；S5.3: The slave station sends a normal command to the master station, the master station receives the external command, and the slave station updates the modulation strategy;
S6：返回S4.S6: return to S4.
其中，上述S2步骤中所涉及到的同步握手方式如下：Wherein, the synchronous handshake method involved in the above S2 step is as follows:
S2.1：主站询问地址指令S2.1: Master station inquiry address command
S2.2：从站接收到询问地址指令，从站依据预分配的地址排序，依次向主站发送指令；若某一从站未收到指令，则主站提示并预警；S2.2: The slave station receives the query address instruction, and the slave station sends instructions to the master station in sequence according to the pre-allocated addresses; if a slave station does not receive the instruction, the master station prompts and warns;
S2.3：主站再次发送同步指令与调制策略选择指令，命令各从站进入等候状态；S2.3: The master station sends the synchronization instruction and the modulation strategy selection instruction again, ordering each slave station to enter the waiting state;
S2.4：从站依次发送回应指令，进入等候状态。S2.4: The slave station sends response commands one by one and enters the waiting state.
其中，上述S4步骤中所涉及到的同步握手方式如下：Among them, the synchronous handshake method involved in the above S4 step is as follows:
S4.1：主站依据从站地址，同时向各从站进行状态询问指令的发送；S4.1: The master station sends status inquiry commands to each slave station at the same time according to the address of the slave station;
S4.2：各从站接收到主站指令后若从站工作正常，则不需向主站发送响应指令，若从站工作不正常，则需向主站发送相应指令；S4.2: After each slave station receives the command from the master station, if the slave station works normally, it does not need to send a response command to the master station; if the slave station does not work normally, it needs to send a corresponding command to the master station;
S4.3：主站向从站发送接收指令完成指令。S4.3: The master station sends a receiving instruction completion instruction to the slave station.
在本申请的描述中，需要理解的是，术语“上”、“下”、“前”、“后”、“左”、“右”、“竖直”、“水平”、“顶”、“底”、“内”、“外”等指示的方位或位置关系为基于附图所示的方位或位置关系，仅是为了便于描述本申请和简化描述，而不是指示或暗示所指的装置或元件必须具有特定的方位、以特定的方位构造和操作，因此不能理解为对本申请的限制。In the description of this application, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", The orientation or positional relationship indicated by "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the application and simplifying the description, rather than indicating or implying the referred device Or elements must have a certain orientation, be constructed and operate in a certain orientation, and thus should not be construed as limiting the application.
本领域技术人员知道，除了以纯计算机可读程序代码方式实现本发明提供的系统、装置及其各个模块以外，完全可以通过将方法步骤进行逻辑编程来使得本发明提供的系统、装置及其各个模块以逻辑门、开关、专用集成电路、可编程逻辑控制器以及嵌入式微控制器等的形式来实现相同程序。所以，本发明提供的系统、装置及其各个模块可以被认为是一种硬件部件，而对其内包括的用于实现各种程序的模块也可以视为硬件部件内的结构；也可以将用于实现各种功能的模块视为既可以是实现方法的软件程序又可以是硬件部件内的结构。Those skilled in the art know that, in addition to realizing the system, device and each module thereof provided by the present invention in a purely computer-readable program code mode, the system, device and each module thereof provided by the present invention can be completely programmed by logically programming the method steps. The same program is implemented in the form of logic gates, switches, application specific integrated circuits, programmable logic controllers, and embedded microcontrollers, among others. Therefore, the system, device and each module provided by the present invention can be regarded as a hardware component, and the modules included in it for realizing various programs can also be regarded as the structure in the hardware component; A module for realizing various functions can be regarded as either a software program realizing a method or a structure within a hardware component.
以上对本发明的具体实施例进行了描述。需要理解的是，本发明并不局限于上述特定实施方式，本领域技术人员可以在权利要求的范围内做出各种变化或修改，这并不影响本发明的实质内容。在不冲突的情况下，本申请的实施例和实施例中的特征可以任意相互组合。Specific embodiments of the present invention have been described above. It should be understood that the present invention is not limited to the specific embodiments described above, and those skilled in the art may make various changes or modifications within the scope of the claims, which do not affect the essence of the present invention. In the case of no conflict, the embodiments of the present application and the features in the embodiments can be combined with each other arbitrarily.
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