WO2022183646A1 - 一种直流配网故障保护及恢复的系统和方法 - Google Patents

一种直流配网故障保护及恢复的系统和方法 Download PDF

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WO2022183646A1
WO2022183646A1 PCT/CN2021/104036 CN2021104036W WO2022183646A1 WO 2022183646 A1 WO2022183646 A1 WO 2022183646A1 CN 2021104036 W CN2021104036 W CN 2021104036W WO 2022183646 A1 WO2022183646 A1 WO 2022183646A1
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module
electrically connected
fault
recovery
distribution network
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PCT/CN2021/104036
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English (en)
French (fr)
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施莉
寇凤海
郭倩倩
任鹏
梁昊天
陈通
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中国电建集团河北省电力勘测设计研究院有限公司
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Publication of WO2022183646A1 publication Critical patent/WO2022183646A1/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
    • 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
    • Y02E60/60—Arrangements for transfer of electric power between AC networks or generators via a high voltage DC link [HVCD]

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  • the invention relates to the technical field of direct current distribution network, in particular to a system and method for fault protection and recovery of direct current distribution network.
  • the DC distribution network is relative to the AC distribution network. It provides the load with a DC bus.
  • the DC load can be directly powered by the DC bus, while the AC load needs to be powered by the inverter device. If the proportion of the DC load in the load is Larger, DC power distribution will have greater advantages.
  • the DC distribution network has small line loss, high reliability, no need for phase frequency control, and strong ability to accept distributed power sources.
  • high-voltage DC protection systems generally use overcurrent protection and traveling wave protection. Due to the complex network topology of the DC distribution system and the large number of DCs, it is difficult to ensure the selectivity of overcurrent protection. Due to the short line length in the DC distribution network, traveling wave protection The protection is not applicable to the distribution network, so a system and method for fault protection and recovery of a DC distribution network are proposed.
  • the technical problem to be solved by the present invention is to provide a system and method for fault protection and recovery of a DC distribution network with a real-time monitoring function, simple and convenient operation, and high applicability of the protection mode.
  • the technical scheme adopted in the present invention is:
  • a system for protection and recovery of DC distribution network faults comprising a single-chip microcomputer, an input end of the single-chip microcomputer is electrically connected with an output end of a data signal acquisition module, and an input end of the data signal acquisition module is connected with an output end of an A/D conversion module. electrical connection, the input end of the A/D conversion module is electrically connected with the output end of the monitoring module, and the input end of the monitoring module is electrically connected with the output end of the DC power supply;
  • the single-chip microcomputer is also bidirectionally electrically connected to the data storage module, and the output end of the single-chip microcomputer is electrically connected to the input ends of the display module, the relay, the fault protection module, and the data analysis and processing module respectively, and the output end of the data analysis and processing module is connected to the database.
  • the input terminal of the relay is electrically connected to the input terminal of the relay
  • the output terminal of the relay is electrically connected to the input terminal of the fault alarm module
  • the output terminal of the fault protection module is electrically connected to the input terminal of the fault recovery module
  • the output terminal of the fault recovery module is electrically connected to the communication terminal.
  • the input end of the module is electrically connected, and the output end of the communication module is signally connected with the input end of the main control station;
  • the input end of the DC distribution network fault protection and recovery system is electrically connected with the output end of the power module.
  • a further improvement of the technical solution of the present invention is that: the single-chip microcomputer adopts STM32F746VGT6 single-chip microcomputer chip.
  • a further improvement of the technical solution of the present invention is that: the A/D conversion module adopts AD7701AN chip.
  • the monitoring module includes a short-circuit monitoring unit, a grounding and insulation monitoring unit, a DC ring network monitoring unit and a leakage current monitoring unit.
  • a further improvement of the technical solution of the present invention is that: the display module includes a display screen.
  • a further improvement of the technical solution of the present invention is that the fault alarm module includes a sound and light alarm, and the model of the sound and light alarm is TGSG-06C.
  • a further improvement of the technical solution of the present invention is that the data analysis and processing module includes a data signal processing unit, a data signal comparison unit and a fault analysis unit.
  • the fault protection module includes an over-temperature protection unit, an over-voltage protection unit, a threshold protection unit and a blocking unit.
  • a further improvement of the technical solution of the present invention is that: the fault recovery module includes a delayed restart unit.
  • a method for fault protection and recovery of a DC distribution network comprising the following steps:
  • the current data is monitored in real time through the monitoring module, and the data is analyzed through the data analysis and processing module.
  • the fault protection module is used to protect the current;
  • the fault recovery module After the current fault protection, after the data returns to normal, the fault recovery module is used for restart and recovery. When the restart fails, the monitoring, analysis and processing operations are repeated, and the fault is removed and restarted.
  • the DC distribution network fault protection and recovery system and method when in use, perform real-time monitoring on the DC distribution network through the monitoring module, when the monitoring module monitors the channel fault, the data signal acquisition module collects the fault information, and via The data analysis and processing module conducts fault analysis. After the analysis is completed, the fault protection module is used to protect the fault, and restart and restore in time after the delay.
  • the operation is simple and convenient, and the protection method has high applicability, which can be applied to the distribution network.
  • FIG. 1 is a schematic diagram of the system of the present invention.
  • a DC distribution network fault protection and recovery system includes a single-chip microcomputer.
  • the single-chip microcomputer adopts the STM32F746VGT6 single-chip microcomputer chip.
  • the single-chip microcomputer is an integrated circuit chip. It is a small and complete microcomputer system that integrates functions such as device CPU, random access memory RAM, read-only memory ROM, various I/O ports and interrupt systems, timer/counter and other functions into a silicon chip.
  • the input end of the single-chip microcomputer is electrically connected to the output end of the data signal acquisition module, the input end of the data signal acquisition module is electrically connected to the output end of the A/D conversion module, and the input end of the A/D conversion module is electrically connected to the output end of the monitoring module , the input end of the monitoring module is electrically connected with the output end of the DC power supply.
  • the A/D conversion module adopts AD7701AN chip.
  • the single-chip microcomputer is also bidirectionally electrically connected to the data storage module, and the output end of the single-chip microcomputer is electrically connected to the input ends of the display module, the relay, the fault protection module, and the data analysis and processing module respectively, and the output end of the data analysis and processing module is connected to the database.
  • the input terminal of the relay is electrically connected to the input terminal of the relay
  • the output terminal of the relay is electrically connected to the input terminal of the fault alarm module
  • the output terminal of the fault protection module is electrically connected to the input terminal of the fault recovery module
  • the output terminal of the fault recovery module is electrically connected to the communication terminal.
  • the input end of the module is electrically connected, and the output end of the communication module is signally connected with the input end of the main control station.
  • a relay is an electrical control device, which is an electrical appliance that makes a predetermined step change of the controlled quantity in the electrical output circuit when the change of the input quantity reaches the specified requirements.
  • the interactive relationship is usually used in automatic control circuits. It is actually an "automatic switch” that uses a small current to control the operation of a large current, so it plays the role of automatic adjustment, safety protection, and conversion circuit in the circuit.
  • the monitoring module includes a short-circuit monitoring unit, a grounding, insulation monitoring unit, a DC ring network monitoring unit and a leakage current monitoring unit.
  • the display module includes a display screen, and the fault alarm module includes a sound and light alarm.
  • the model of the sound and light alarm is TGSG-06C.
  • the data analysis and processing module includes a data signal processing unit, a data signal comparison unit and a fault analysis unit, and the fault protection module includes an over-temperature protection unit, an over-voltage protection unit, a threshold protection unit and a blocking unit.
  • the DC distribution network is monitored in real time through the monitoring module.
  • the monitoring module monitors the channel fault
  • the fault information is collected by the data signal acquisition module, and the fault is analyzed by the data analysis and processing module. After the analysis is completed, the fault protection module is used.
  • the operation is simple and convenient, and the protection method has high applicability, which can be applied to the distribution network.
  • a method for fault protection and recovery of a DC distribution network comprising the following steps:
  • the current data is monitored in real time through the monitoring module, and the data is analyzed through the data analysis and processing module.
  • the fault protection module is used to protect the current;
  • the fault recovery module After the current fault protection, after the data returns to normal, the fault recovery module is used for restart and recovery. When the restart fails, the monitoring, analysis and processing operations are repeated, and the fault is removed and restarted.
  • the DC distribution network fault protection and recovery system and method when in use, monitor the DC distribution network in real time through the monitoring module, and when the monitoring module monitors the channel fault, the data signal acquisition module monitors the fault information. Collect, and conduct fault analysis through the data analysis and processing module. After the analysis is completed, the fault protection module is used to protect the fault, and restart and restore in time after a delay.
  • the operation is simple and convenient, and the protection method has high applicability. in the grid.

Abstract

本发明公开了一种直流配网故障保护及恢复的系统和方法，包括单片机，单片机的输入端与数据信号采集模块的输出端电连接，数据信号采集模块的输入端与A/D转换模块的输出端电连接，A/D转换模块的输入端与监测模块的输出端电连接，监测模块的输入端与直流电源的输出端电连接，所述单片机还与数据存储模块双向电连接，所述单片机的输出端分别与显示模块、继电器、故障保护模块、数据分析处理模块的输入端电连接，直流配网故障保护及恢复系统的输入端与电源模块的输出端电连接。本发明具备实时监测功能，操作简单便捷，保护方式适用性较高。

Description

一种直流配网故障保护及恢复的系统和方法 技术领域
本发明涉及直流配网技术领域，尤其是一种直流配网故障保护及恢复的系统和方法。
背景技术
直流配电网是相对于交流配电网而言的，其提供给负荷的是直流母线，直流负荷可以直接由直流母线供电，而交流负荷需要经过逆变设备后供电，如果负荷中直流负荷比例较大，直流配电将会有较大优势。直流配电网线损小，可靠性高、无需相频控制、接纳分布式电源能力强。
目前高压直流保护系统一般采用过流保护和行波保护，由于直流配电系统网络拓扑结构复杂，直流繁多，过流保护难以保证选择性，而由于直流配电网中线路长度较短，行波保护不适用于配电网中，因此现提出一种直流配网故障保护及恢复的系统和方法。
发明内容
本发明需要解决的技术问题是提供具备实时监测功能，操作简单便捷，保护方式适用性较高的一种直流配网故障保护及恢复的系统和方法。
为解决上述技术问题，本发明所采用的技术方案是：
一种直流配网故障保护及恢复的系统，包括单片机，所述单片机的输入端与数据信号采集模块的输出端电连接，所述数据信号采集模块的输入端与A/D转换模块的输出端电连接，所述A/D转换模块的输入端与监测模块的输出端电连接，所述监测模块的输入端与直流电源的输出端电连接；
所述单片机还与数据存储模块双向电连接，所述单片机的输出端分别与显示模块、继电器、故障保护模块、数据分析处理模块的输入端电连接，所述数据分析处理模块的输出端与数据库的输入端电连接，所述继电器的输出端与故 障警报模块的输入端电连接，所述故障保护模块的输出端与故障恢复模块的输入端电连接，所述故障恢复模块的输出端与通信模块的输入端电连接，所述通信模块的输出端与主控站的输入端信号连接；
所述直流配网故障保护及恢复系统的输入端与电源模块的输出端电连接。
本发明技术方案的进一步改进在于：所述单片机采用STM32F746VGT6单片机芯片。
本发明技术方案的进一步改进在于：所述A/D转换模块采用AD7701AN芯片。
本发明技术方案的进一步改进在于：所述监测模块包括短路监测单元、接地、绝缘监测单元、直流环网监测单元和漏电流监测单元。
本发明技术方案的进一步改进在于：所述显示模块包括显示屏。
本发明技术方案的进一步改进在于：所述故障警报模块包括声光报警器，所述声光报警器的型号为TGSG-06C。
本发明技术方案的进一步改进在于：所述数据分析处理模块包括数据信号处理单元、数据信号对比单元和故障分析单元。
本发明技术方案的进一步改进在于：所述故障保护模块包括过温保护单元、过压保护单元、阀值保护单元和闭锁单元。
本发明技术方案的进一步改进在于：所述故障恢复模块包括延迟重启单元。
一种直流配网故障保护及恢复的方法，其包括以下步骤：
步骤一、
通过监测模块对电流的数据情况进行实时监测，经由数据分析处理模块进行数据分析，数据异常时，通过故障保护模块对电流进行保护处理；
步骤二、
电流故障保护之后，在数据恢复正常后，通过故障恢复模块进行重启恢复，重启失败时重复监测分析处理操作，故障排除后重启。
由于采用了上述技术方案，本发明取得的技术进步是：
该直流配网故障保护及恢复系统和方法，在使用时，通过监测模块对直流 配网进行实时的监测，当监测模块监测道故障时，通过数据信号采集模块对故障信息的进行采集，并经由数据分析处理模块进行故障分析，分析完成后，通过故障保护模块对故障保护，并在延迟后进行及时的重启恢复，操作简单便捷，保护方式适用性较高，可适用于配电网中。
附图说明
图1是本发明系统示意图。
具体实施方式
下面结合实施例对本发明做进一步详细说明：
如图1所示，一种直流配网故障保护及恢复的系统，包括单片机，单片机采用STM32F746VGT6单片机芯片，单片机是一种集成电路芯片，是采用超大规模集成电路技术把具有数据处理能力的中央处理器CPU、随机存储器RAM、只读存储器ROM、多种I/O口和中断系统、定时器/计数器等功能集成到一块硅片上构成的一个小而完善的微型计算机系统。
单片机的输入端与数据信号采集模块的输出端电连接，数据信号采集模块的输入端与A/D转换模块的输出端电连接，A/D转换模块的输入端与监测模块的输出端电连接，监测模块的输入端与直流电源的输出端电连接。其中，A/D转换模块采用AD7701AN芯片。
所述单片机还与数据存储模块双向电连接，所述单片机的输出端分别与显示模块、继电器、故障保护模块、数据分析处理模块的输入端电连接，所述数据分析处理模块的输出端与数据库的输入端电连接，所述继电器的输出端与故障警报模块的输入端电连接，所述故障保护模块的输出端与故障恢复模块的输入端电连接，所述故障恢复模块的输出端与通信模块的输入端电连接，所述通信模块的输出端与主控站的输入端信号连接。
继电器是一种电控制器件，是当输入量的变化达到规定要求时，在电气输出电路中使被控量发生预定的阶跃变化的一种电器，它具有控制系统和被控制 系统之间的互动关系，通常应用于自动化的控制电路中，它实际上是用小电流去控制大电流运作的一种“自动开关”，故在电路中起着自动调节、安全保护、转换电路等作用。
监测模块包括短路监测单元、接地、绝缘监测单元、直流环网监测单元和漏电流监测单元，显示模块包括显示屏，故障警报模块包括声光报警器，声光报警器的型号为TGSG-06C，数据分析处理模块包括数据信号处理单元、数据信号对比单元和故障分析单元，故障保护模块包括过温保护单元、过压保护单元、阀值保护单元和闭锁单元。
通过监测模块对直流配网进行实时的监测，当监测模块监测道故障时，通过数据信号采集模块对故障信息的进行采集，并经由数据分析处理模块进行故障分析，分析完成后，通过故障保护模块对故障保护，并在延迟后进行及时的重启恢复，操作简单便捷，保护方式适用性较高，可适用于配电网中。
一种直流配网故障保护及恢复的方法，包括以下步骤：
步骤一、
通过监测模块对电流的数据情况进行实时监测，经由数据分析处理模块进行数据分析，数据异常时，通过故障保护模块对电流进行保护处理；
步骤二、
电流故障保护之后，在数据恢复正常后，通过故障恢复模块进行重启恢复，重启失败时重复监测分析处理操作，故障排除后重启。
综上所述，该直流配网故障保护及恢复系统和方法，在使用时，通过监测模块对直流配网进行实时的监测，当监测模块监测道故障时，通过数据信号采集模块对故障信息的进行采集，并经由数据分析处理模块进行故障分析，分析完成后，通过故障保护模块对故障保护，并在延迟后进行及时的重启恢复，操作简单便捷，保护方式适用性较高，可适用于配电网中。
以上所述的实施例仅仅是对本发明的优选实施方式进行描述，并非对本发 明的范围进行限定，在不脱离本发明设计精神的前提下，本领域普通技术人员对本发明的技术方案做出的各种变形和改进，均应落入本发明权利要求书确定的保护范围内。

Claims (10)

  1. 一种直流配网故障保护及恢复的系统，其特征在于：包括单片机，所述单片机的输入端与数据信号采集模块的输出端电连接，所述数据信号采集模块的输入端与A/D转换模块的输出端电连接，所述A/D转换模块的输入端与监测模块的输出端电连接，所述监测模块的输入端与直流电源的输出端电连接；
    所述单片机还与数据存储模块双向电连接，所述单片机的输出端分别与显示模块、继电器、故障保护模块、数据分析处理模块的输入端电连接，所述数据分析处理模块的输出端与数据库的输入端电连接，所述继电器的输出端与故障警报模块的输入端电连接，所述故障保护模块的输出端与故障恢复模块的输入端电连接，所述故障恢复模块的输出端与通信模块的输入端电连接，所述通信模块的输出端与主控站的输入端信号连接；
    所述直流配网故障保护及恢复系统的输入端与电源模块的输出端电连接。
  2. 根据权利要求1所述的一种直流配网故障保护及恢复的系统，其特征在于：所述单片机采用STM32F746VGT6单片机芯片。
  3. 根据权利要求1所述的一种直流配网故障保护及恢复的系统，其特征在于：所述A/D转换模块采用AD7701AN芯片。
  4. 根据权利要求1所述的一种直流配网故障保护及恢复的系统，其特征在于：所述监测模块包括短路监测单元、接地、绝缘监测单元、直流环网监测单元和漏电流监测单元。
  5. 根据权利要求1所述的一种直流配网故障保护及恢复的系统，其特征在于：所述显示模块包括显示屏。
  6. 根据权利要求1所述的一种直流配网故障保护及恢复的系统，其特征在于：所述故障警报模块包括声光报警器，所述声光报警器的型号为TGSG-06C。
  7. 根据权利要求1所述的一种直流配网故障保护及恢复的系统，其特征在于：所述数据分析处理模块包括数据信号处理单元、数据信号对比单元和故障分析单元。
  8. 根据权利要求1所述的一种直流配网故障保护及恢复的系统，其特征在于：所述故障保护模块包括过温保护单元、过压保护单元、阀值保护单元和闭锁单元。
  9. 根据权利要求1所述的一种直流配网故障保护及恢复的系统，其特征在于：所述故障恢复模块包括延迟重启单元。
  10. 一种直流配网故障保护及恢复的方法，其特征在于包括以下步骤：
    步骤一、
    通过监测模块对电流的数据情况进行实时监测，经由数据分析处理模块进行数据分析，数据异常时，通过故障保护模块对电流进行保护处理；
    步骤二、
    电流故障保护之后，在数据恢复正常后，通过故障恢复模块进行重启恢复，重启失败时重复监测分析处理操作，故障排除后重启。
PCT/CN2021/104036 2021-03-04 2021-07-01 一种直流配网故障保护及恢复的系统和方法 WO2022183646A1 (zh)

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