WO2021139071A1 - 一种智能户外开关箱及其闭环工字型配电网 - Google Patents

一种智能户外开关箱及其闭环工字型配电网 Download PDF

Info

Publication number
WO2021139071A1
WO2021139071A1 PCT/CN2020/092607 CN2020092607W WO2021139071A1 WO 2021139071 A1 WO2021139071 A1 WO 2021139071A1 CN 2020092607 W CN2020092607 W CN 2020092607W WO 2021139071 A1 WO2021139071 A1 WO 2021139071A1
Authority
WO
WIPO (PCT)
Prior art keywords
circuit breaker
dtu
loop
switch box
switch
Prior art date
Application number
PCT/CN2020/092607
Other languages
English (en)
French (fr)
Inventor
涂景添
李家良
宋国
李恒昭
柯春裕
Original Assignee
赫兹曼电力（广东）有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 赫兹曼电力（广东）有限公司 filed Critical 赫兹曼电力（广东）有限公司
Publication of WO2021139071A1 publication Critical patent/WO2021139071A1/zh

Links

Images

Classifications

    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
    • H02H7/00—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions
    • H02H7/26—Sectionalised protection of cable or line systems, e.g. for disconnecting a section on which a short-circuit, earth fault, or arc discharge has occured
    • 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
    • Y04S10/20—Systems supporting electrical power generation, transmission or distribution using protection elements, arrangements or systems
    • 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
    • Y04S40/00—Systems for electrical power generation, transmission, distribution or end-user application management characterised by the use of communication or information technologies, or communication or information technology specific aspects supporting them
    • Y04S40/12—Systems for electrical power generation, transmission, distribution or end-user application management characterised by the use of communication or information technologies, or communication or information technology specific aspects supporting them characterised by data transport means between the monitoring, controlling or managing units and monitored, controlled or operated electrical equipment
    • Y04S40/124—Systems for electrical power generation, transmission, distribution or end-user application management characterised by the use of communication or information technologies, or communication or information technology specific aspects supporting them characterised by data transport means between the monitoring, controlling or managing units and monitored, controlled or operated electrical equipment using wired telecommunication networks or data transmission busses
    • 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
    • Y04S40/00—Systems for electrical power generation, transmission, distribution or end-user application management characterised by the use of communication or information technologies, or communication or information technology specific aspects supporting them
    • Y04S40/12—Systems for electrical power generation, transmission, distribution or end-user application management characterised by the use of communication or information technologies, or communication or information technology specific aspects supporting them characterised by data transport means between the monitoring, controlling or managing units and monitored, controlled or operated electrical equipment
    • Y04S40/128—Systems for electrical power generation, transmission, distribution or end-user application management characterised by the use of communication or information technologies, or communication or information technology specific aspects supporting them characterised by data transport means between the monitoring, controlling or managing units and monitored, controlled or operated electrical equipment involving the use of Internet protocol

Definitions

  • the invention relates to an intelligent outdoor switch box and a closed-loop I-shaped power distribution network.
  • the domestic distribution network still uses a large number of load switch-fuse combination appliances and load switch products, which are far from meeting the requirements of distributed power construction, strong smart grid, and ubiquitous power Internet of Things.
  • the level of automation is higher than that of Japan, Singapore, etc.
  • the developed countries are poor.
  • the main wiring methods of domestic medium-voltage cable networks mainly include single-ring network, N-supply and one-backup, and single-shot wiring.
  • the power outage range is large, the power outage time is longer, and the power supply reliability is low.
  • domestic distribution network automation mainly adopts local and centralized solutions.
  • the local type does not rely on the control of the master station. Through the cooperation of voltage, current, and timing, fault isolation and restoration of power supply in non-faulty areas are realized, and the processing time is long.
  • the centralized type requires the cooperation of the master station and each power distribution terminal to realize the isolation of faults and the restoration of power supply in non-faulty areas through remote control or manual methods, which has higher requirements for the master station and communication quality.
  • the purpose of the present invention is to provide an intelligent outdoor switch box and its closed-loop I-shaped distribution network with small power outage range, short power outage time, high power supply reliability, and effectively improve the performance of the distribution network, so as to overcome the problems in the prior art Shortcomings.
  • An intelligent outdoor switch box designed for this purpose including incoming PT and DTU intervals, more than one breaker interval and bus PT intervals, PT and DTU intervals including centralized DTUs and incoming voltage transformers that are electrically connected to each other ,
  • Each circuit breaker bay is equipped with a current transformer and a circuit breaker switch
  • the bus PT bay is equipped with a voltage transformer
  • the centralized DTU and the current transformer of each circuit breaker bay are electrically connected
  • the centralized DTU and the voltage transformer are electrically connected.
  • Each circuit breaker bay is equipped with a vacuum circuit breaker.
  • the centralized DTU is equipped with an optical fiber interface for connecting another smart outdoor switch box, and each smart outdoor switch box is equipped with a communication module; the centralized DTU processes the collected voltage, current, and circuit breaker switch status, and uses the optical fiber to Communication module connection; each smart outdoor switch box is connected by optical fiber through the communication module to realize information interaction.
  • each breaker interval and bus PT interval are powered by the secondary side of the incoming line PT and the incoming line voltage transformer of the DTU interval.
  • the centralized DTU collects the voltage, current, and circuit breaker switch status of all intervals, and exchanges information between each smart outdoor switch box, so that the centralized DTU has a fiber optic differential protection module for rapid fault location and isolation ,
  • the optical fiber differential protection module includes at least a voltage transformer; the centralized DTU has a bus differential protection module used to quickly locate and isolate the internal fault of the smart outdoor switch box; the centralized DTU is equipped to achieve rapid fault location under abnormal conditions Unlike the isolated backup protection module, the centralized DTU is equipped with a backup self-input module used to quickly restore power after fault isolation; the backup protection module and the backup self-input module include at least a tie breaker switch.
  • a closed-loop I-shaped power distribution network comprising the above-mentioned smart outdoor switch box, and two sections of busbars of at least two substations, characterized in that the outlet switch of the first section of the busbar of one of the substations is connected to several smart outdoor switch boxes. Then, it is connected to the outlet switch of the second section of the bus to form a closed loop.
  • the outlet switch of the first section of the bus of another substation is connected to several smart outdoor switch boxes and connected to the outlet switch of the second section of the bus.
  • one closed loop and the other closed loop form a closed loop I-shaped distribution network through the communication connection between the smart outdoor switch boxes; the switches connected to each other in the closed loop all use circuit breaker switches, and each smart outdoor switch box
  • the internal circuit breaker switches are controlled by centralized DTU.
  • Circuit breaker switches are divided into loop-in circuit breaker switches, loop-out circuit breaker switches, internal feeder circuit breaker switches, and tie breaker switches according to their functions.
  • the loop-in circuit breaker switch and the loop-out circuit breaker switch are both closed when the smart outdoor switch box is operating normally.
  • the present invention adopts centralized DTU. Through its optical fiber differential protection function, busbar differential protection function, backup protection function, over-flow protection function, backup automatic switch and other functions, it uses optical fiber communication to realize each switch box The information exchange between them realizes the rapid isolation of faults in the distribution network and the restoration of power supply in non-faulty areas.
  • the present invention does not rely on the master station during the function realization process, and completes fault isolation and power supply restoration on the spot. Due to the accurate location and isolation of the fault, the scope of power outage is greatly reduced. At the same time, due to the closed-loop I-shaped distribution grid, when the first fault occurs, the power outage time in the non-faulty area is zero, which greatly improves the reliability of power supply.
  • the use of advanced optical fiber network for information interconnection enables the restoration of power supply in non-faulty areas within milliseconds even if two failures occur at the same time.
  • Fig. 1 is a schematic diagram of a smart outdoor switch box according to an embodiment of the present invention.
  • Fig. 2 is a schematic diagram of a partial structure of a smart outdoor switch box according to an embodiment of the present invention.
  • Fig. 3 is a schematic diagram of a closed-loop I-shaped distribution network grid structure according to an embodiment of the present invention.
  • Fig. 4 is a processing of the first failure between smart outdoor switch boxes in a closed-loop I-shaped distribution network grid according to an embodiment of the present invention.
  • Fig. 5 is a processing of a second fault occurring between smart outdoor switch boxes in a closed-loop I-shaped distribution network grid according to an embodiment of the present invention.
  • Fig. 6 is the processing of the busbar fault in the smart outdoor switch box in the closed-loop I-shaped distribution network grid according to an embodiment of the present invention.
  • Fig. 7 shows the processing of a feeder fault in a smart outdoor switch box in a closed-loop I-shaped distribution network frame according to an embodiment of the present invention.
  • Fig. 8 is a schematic diagram of a circuit breaker switch distribution structure of an energy outdoor switch box in a closed-loop I-shaped distribution network grid frame according to an embodiment of the present invention.
  • 1 is the loop-in circuit breaker switch
  • 2 is the loop-out circuit breaker switch
  • 3 is the first internal feeder circuit breaker switch
  • 4 is the second internal feeder circuit breaker switch
  • 5 is the third internal feeder circuit breaker switch
  • 6 It is the fourth internal feeder circuit breaker switch
  • 7 is the inlet PT and DTU interval
  • 7.1 is the centralized DTU
  • 8 is the circuit breaker interval
  • 8.1 is the current transformer
  • 9 is the bus PT interval
  • 9.1 is the voltage transformer.
  • an intelligent outdoor switch box including incoming PT and DTU bay 7, more than one breaker bay 8 and bus PT bay 9, PT and DTU bay 7 includes centralized DTU that are electrically connected to each other 7.1 and incoming line voltage transformer, each circuit breaker bay 8 is equipped with a current transformer 8.1 and a circuit breaker switch, and the bus PT bay 9 is equipped with a voltage transformer 9.1, which is characterized by: centralized DTU 7.1 and each circuit breaker The current transformer 8.1 of bay 8 is electrically connected, and the centralized DTU 7.1 is electrically connected to the voltage transformer 9.1, so that the centralized DTU 7.1 collects the voltage, current, and circuit breaker switch status of all bays.
  • Each circuit breaker bay 8 is equipped with a vacuum circuit breaker 8.2.
  • the centralized DTU 7.1 is equipped with an optical fiber interface for connecting another smart outdoor switch box, and each smart outdoor switch box is equipped with a communication module; the centralized DTU 7.1 processes the collected voltage, current, and circuit breaker switch status, and passes The optical fiber is connected to the communication module; each smart outdoor switch box is connected by optical fiber through the communication module to realize information interaction.
  • each breaker bay 8 and busbar PT bay 9 are powered by the incoming line PT and the secondary side of the incoming line voltage transformer of DTU bay 7.
  • the centralized DTU 7.1 collects the voltage, current, and circuit breaker switch status of all intervals, and exchanges information between each smart outdoor switch box, so that the centralized DTU 7.1 has the optical fiber differential for rapid fault location and isolation Protection module, the optical fiber differential protection module includes at least a voltage transformer; the centralized DTU 7.1 has a bus differential protection module that can be used to quickly locate and isolate the internal fault of the smart outdoor switch box; the centralized DTU 7.1 is equipped to achieve abnormal conditions A backup protection module for rapid fault location and isolation.
  • the centralized DTU 7.1 is equipped with a backup automatic switching module for quick restoration of power supply after fault isolation; the backup protection module and the backup automatic switching module include at least a contact breaker switch.
  • Each smart outdoor switch box includes six to ten compartments.
  • One of the bays includes all-in-one centralized DTU 7.1 functional units and the incoming line voltage transformers set in the bay; one bay includes the bus voltage transformers set in the bay; the other bays include current transformers set in the corresponding bay and Operating mechanism connected to the same interval.
  • the present invention combines the traditional open-loop distribution network into a new closed-loop I-shaped distribution network, adopts a centralized DTU, is equipped with optical fiber differential protection function, busbar differential protection function, overcurrent flow protection function, and backup automatic switching function. The realization does not depend on the master station to complete the fault isolation of the distribution network and quickly restore the power supply, which can effectively reduce the problem of poor power supply reliability due to long power outages and large power outages in traditional distribution networks.
  • the faults between each smart outdoor switch box are isolated by the centralized DTU 7.1 through the differential protection function.
  • the busbar fault inside the switch box is also isolated by the centralized DTU 7.1 bus differential protection function.
  • the centralized DTU 7.1 controls the feeder at the same time, and realizes the protection of the internal feeder circuit breaker switch by collecting the current of the feeder and the switch status of the circuit breaker. When two failures occur in the same closed loop at the same time, the connection circuit breaker switch realizes the local power supply control function.
  • the incoming PT and DTU bay 7 include voltage transformers connected to the loop-in circuit breaker switch and loop-out circuit breaker switch, as well as a centralized DTU 7.1, power supply module and communication module.
  • the busbar PT bay 9 includes a voltage transformer 9.1 arranged on the busbar.
  • the circuit breaker bay 8 includes a current transformer and a circuit breaker arranged on the bay.
  • the centralized DTU 7.1 collects and processes all interval voltages, currents, and circuit breaker switch states, and connects them to the communication module through optical fibers. Each smart outdoor switch box uses optical fibers to connect through the communication module to realize information interaction.
  • the power supply of the system is provided by the incoming PT and the power supply module.
  • a closed-loop I-shaped distribution network including the above-mentioned smart outdoor switch box, and two sections of busbars of at least two substations, one of which is connected to a number of smart outdoor switch boxes by the outlet switch of the first section of the busbar of one substation Then, it is connected to the outlet switch of the second section of the bus to form a closed loop.
  • the outlet switch of the first section of the bus of another substation is connected to several smart outdoor switch boxes and connected to the outlet switch of the second section of the bus.
  • one closed loop and the other closed loop form a closed loop I-shaped distribution network through the cable connection between the smart outdoor switch boxes; the switches connected to each other in the closed loop all use circuit breaker switches, and each smart outdoor switch box
  • the internal circuit breaker switches are controlled by centralized DTU 7.1.
  • the closed-loop I-shaped distribution network fault isolation and rapid power restoration method of the present invention is based on the above-mentioned closed-loop I-shaped distribution network grid structure. This structure realizes the interconnection of different power sources through the tie lines of the two closed loops through the tie unit, and increases the path of the line to power supply.
  • Circuit breaker switches are divided into loop-in circuit breaker switches, loop-out circuit breaker switches, internal feeder circuit breaker switches, and tie breaker switches according to their functions.
  • the loop-in circuit breaker switch and the loop-out circuit breaker switch are both closed when the smart outdoor switch box is operating normally.
  • substation A and substation B are the outlet switches of the two bus sections of the two substations.
  • Each smart outdoor switch box is equipped with loop-in circuit breaker switch 1, loop-out circuit breaker switch 2, and first inner feeder circuit breaker switch 3, second inner feeder circuit breaker switch 4, and third inner feeder circuit breaker switch 5
  • the fourth inner feeder circuit breaker switch 6; among them, the fourth inner feeder circuit breaker switch 6 of the fourth smart outdoor switch box in the substation A is used as a tie breaker switch, and is connected to the fourteenth intelligent switch of the substation B through optical fiber
  • the fourth inner feeder circuit breaker switch 6 of the outdoor switch box, and the fourth inner feeder circuit breaker switch 6 of the fourteenth smart outdoor switch box are used as tie breaker switches.
  • the fault occurs between the second and third smart outdoor switch boxes.
  • the loop-out circuit breaker switch 2 of the second smart outdoor switch box and the loop-in circuit breaker switch 1 of the third smart outdoor switch box detect a differential current.
  • the non-faulty areas of the third, fourth, and fifth smart outdoor switch boxes lose power, and the fourth inner feeder circuit breaker switch 6 of the fourth smart outdoor switch box is used as a tie breaker switch and starts the self-prepared
  • the switching strategy is to close the fourth internal feeder circuit breaker switch 6 of the fourth smart outdoor switch box to complete the self-healing control of the restoration of power supply in the non-faulty area.
  • the second smart outdoor switch box has an internal failure, and the centralized DTU 7.1 of the second smart outdoor switch box detects the bus differential current.
  • the loop-in breaker switch 1, loop-out breaker switch 2, and the first inner feeder breaker switch 3 and the second inner feeder of the second smart outdoor switch box are open.
  • the switch 4, the third inner feeder circuit breaker switch 5, and the fourth inner feeder circuit breaker switch 6 trip at the same time to isolate the fault.
  • the feeder line of the third smart outdoor switch box fails, and the centralized DTU 7.1 of the third smart outdoor switch box detects a fault current in the feeder line of the second inner feeder circuit breaker switch 4.
  • the second inner feeder circuit breaker switch 4 of the third smart outdoor switch box trips to isolate the fault .

Landscapes

  • Remote Monitoring And Control Of Power-Distribution Networks (AREA)

Abstract

本发明公开了一种智能户外开关箱及其闭环工字型配电网，智能户外开关箱包括进线PT及DTU间隔、一个以上的断路器间隔和母线PT间隔，PT及DTU间隔包括互为电连接的集中式DTU和进线电压互感器，每个断路器间隔均设有电流互感器，母线PT间隔设有电压互感器，集中式DTU和每个断路器间隔的电流互感器电连接，集中式DTU和电压互感器电连接。本发明采用集中式DTU，通过其设有的光纤差动保护功能、母线差动保护功能、后备保护功能、过流速断保护功能、备自投等功能，运用光纤通讯的方式实现各开关箱之间的信息交互，实现配电网线路的故障快速隔离和非故障区域的恢复供电。

Description

一种智能户外开关箱及其闭环工字型配电网 技术领域
本发明涉及一种智能户外开关箱及其闭环工字型配电网。
背景技术
目前国内配电网仍在大量使用负荷开关-熔断器组合电器、负荷开关的产品，远远无法满足分布式电源建设以及坚强智能电网、泛在电力物联网的要求，自动化水平比日本、新加坡等发达国家差。
国内中压电缆网在主接线方式上主要有单环网式、N供一备式、单射式等接线方式，当故障发生时，停电范围较大，停电时间较长，供电可靠性低。
目前国内配电网自动化主要采用就地型和集中型方案。就地型不依赖于主站控制，通过电压、电流、时序的配合，实现故障的隔离和非故障区域的恢复供电，处理时间长。集中型需通过主站与各配电终端的配合，通过遥控或人工的方式，实现故障的隔离和非故障区域的恢复供电，对主站及通讯质量的要求较高。
发明内容
本发明的目的旨在提供一种停电范围小、停电时间短、供电可靠性高，有效提高配电网性能的智能户外开关箱及其闭环工字型配电网，以克服现有技术中的不足之处。
按此目的设计的一种智能户外开关箱，包括进线PT及DTU间隔、一个以上的断路器间隔和母线PT间隔，PT及DTU间隔包括互为电连接的集中式DTU和进线电压互感器，每个断路器间隔均设有电流互感器和断路器开关，母线PT间隔设有电压互感器，集中式DTU和每个断路器间隔的电流互感器电连接，集中式DTU和电压互感器电连接，以使集中式DTU将所有间隔的电压、电流、断路器开关状态进行采集。
每个断路器间隔均设有真空断路器。
集中式DTU设有用于连接另一智能户外开关箱的光纤接口，每个智能户外开关箱之间设有通讯模块；集中式DTU将采集的电压、电流、断路器开关状态进行处理，通过光纤于通讯模块连接；每个智能户外开关箱之间通过通讯模块采用光纤连接，实现信息的交互。
集中式DTU，以及每个断路器间隔、母线PT间隔的操作机构均由进线PT及DTU间隔的进线电压互感器二次侧供电。
集中式DTU将所有间隔的电压、电流、断路器开关状态进行采集，每个智能户外开关箱之间进行信息交互，以使集中式DTU具备用于实现故障快速定位与隔离的光纤差动保护模块，光纤差动保护模块至少包括电压互感器；集中式DTU具备用于实现智能户外开关箱内部故障时快速定位与隔离的母线差动保护模块；集中式DTU具备用于实现异常情况下故障快速定位与隔离的后备保护模块，集中式DTU具备用于实现故障隔离后的快速恢复供电的备自投模块；后备保护模块和备自投模块分别至少包括联络断路器开关。
一种闭环工字型配电网，包括上述智能户外开关箱，以及至少两个变电站的两段母线，其特征在于：其中一个变电站的第一段母线的出线开关引出连接若干个智能户外开关箱后，并连接至第二段母线的出线开关，以组成一闭环，另一个变电站的第一段母线的出线开关引出连接若干个智能户外开关箱后，并连接至第二段母线的出线开关，以组成另一闭环，一闭环和另一闭环通过智能户外开关箱之间的通讯连接形成闭环工字型配电网；闭环中相互连接的开关均采用断路器开关，且每个智能户外开关箱内断路器开关均由集中式DTU控制。
断路器开关根据功能的不同划分为环进断路器开关、环出断路器开关、内馈线断路器开关和联络断路器开关。
环进断路器开关、环出断路器开关在智能户外开关箱正常运行时均为闭合状态。
本发明有益效果如下：
a、本发明采用集中式DTU，通过其具备的光纤差动保护功能、母线差动保护功能、后备保护功能、过流速断保护功能、备自投等功能，运用光纤通讯的方式实现各开关箱之间的信息交互，实现配电网线路的故障快速隔离和非故障区域的恢复供电。
b、本发明功能实现过程中不依赖于主站，就地完成故障隔离和恢复供电。由于故障的准确定位隔离，极大地缩小停电范围，同时，由于采用闭环工字型配电网网架，在第一次故障发生时，非故障区域停电时间为零，大大提高供电可靠性。运用先进的光纤网络进行信息互联，使得即使同时发生两次故障，亦可在毫秒级内完成非故障区域的恢复供电。
附图说明
图1为本发明的一实施例智能户外开关箱示意图。
图2为本发明的一实施例智能户外开关箱局部结构示意图。
图3为本发明一实施例闭环工字型配电网网架示意图。
图4为本发明一实施例闭环工字型配电网网架中智能户外开关箱之间发生第一次故障的处理。
图5为本发明一实施例闭环工字型配电网网架中智能户外开关箱之间发生第二次故障的处理。
图6为本发明一实施例闭环工字型配电网网架中智能户外开关箱内母线故障的处理。
图7为本发明一实施例闭环工字型配电网网架中智能户外开关箱内馈线故障的处理。
图8为本发明一实施例闭环工字型配电网网架中能户外开关箱的断路器开关分布结构示意图。
图中，1为环进断路器开关，2为环出断路器开关，3为第一内馈线断路器开关，4为第二内馈线断路器开关，5为第三内馈线断路器开关，6为第四内馈线断路器开关，7为进线PT及DTU间隔，7.1为集中式DTU，8为断路器间隔，8.1为电流互感器，9为母线PT间隔，9.1为电压互感器。
具体实施方式
下面结合附图及实施例对本发明作进一步描述。
参见图1-图2，一种智能户外开关箱，包括进线PT及DTU间隔7、一个以上的断路器间隔8和母线PT间隔9，PT及DTU间隔7包括互为电连接的集中式DTU 7.1和进线电压互感器，每个断路器间隔8均设有电流互感器8.1和断路器开关，母线PT间隔9设有电压互感器9.1，其特征在于：集中式DTU 7.1和每个断路器间隔8的电流互感器8.1电连接，集中式DTU 7.1和电压互感器9.1电连接，以使集中式DTU 7.1将所有间隔的电压、电流、断路器开关状态进行采集。
每个断路器间隔8均设有真空断路器8.2。
集中式DTU 7.1设有用于连接另一智能户外开关箱的光纤接口，每个智能户外开关箱之间设有通讯模块；集中式DTU 7.1将采集的电压、电流、断路器开关状态进行处理，通过光纤于通讯模块连接；每个智能户外开关箱之间通过通讯模块采用光纤连接，实现信息的交互。
集中式DTU 7.1，以及每个断路器间隔8、母线PT间隔9的操作机构均由进线PT及DTU 间隔7的进线电压互感器二次侧供电。
集中式DTU 7.1将所有间隔的电压、电流、断路器开关状态进行采集，每个智能户外开关箱之间进行信息交互，以使集中式DTU 7.1具备用于实现故障快速定位与隔离的光纤差动保护模块，光纤差动保护模块至少包括电压互感器；集中式DTU 7.1具备用于实现智能户外开关箱内部故障时快速定位与隔离的母线差动保护模块；集中式DTU 7.1具备用于实现异常情况下故障快速定位与隔离的后备保护模块，集中式DTU 7.1具备用于实现故障隔离后的快速恢复供电的备自投模块；后备保护模块和备自投模块分别至少包括联络断路器开关。
每个智能户外开关箱包括六至十个间隔。其中一个间隔包括多合一集中式DTU 7.1功能单元和设置于该间隔的进线电压互感器；一个间隔包括设置于该间隔的母线电压互感器；其他间隔包括设置于相应间隔的电流互感器以及连接于同一间隔的操作机构。本发明将传统开环型配电网组建成新型闭环工字型配电网，采用集中式DTU，设有光纤差动保护功能、母线差动功能、过流速断保护功能、备自投功能，实现不依赖于主站就地完成配电网故障隔离以及快速恢复供电，可有效减少传统配电网停电时间长、停电范围大而导致供电可靠性差的问题。
每个智能户外开关箱之间的故障由集中式DTU 7.1通过差动保护功能实现故障隔离。开关箱内部的母线故障亦由集中式DTU 7.1的母差保护功能实现故障隔离。集中式DTU 7.1同时控制馈出线，通过采集馈出线的电流、断路器开关状态，实现对内馈线断路器开关的保护。当同一闭环同时出现两次故障时，由联络断路器开关实现就地转供电控制功能。
进线PT及DTU间隔7包括连接于环进断路器开关、环出断路器开关的电压互感器，以及集中式DTU 7.1、电源模块和通讯模块。母线PT间隔9包括设置于母线上的电压互感器9.1。断路器间隔8包括设置于间隔上的电流互感器和断路器。集中式DTU 7.1将所有间隔的电压、电流、断路器开关状态进行采集处理，通过光纤于通讯模块连接，每个智能户外开关箱之间通过通讯模块采用光纤连接，实现信息的交互。***供电由进线PT及电源模块提供。
参见图3，一种闭环工字型配电网，包括上述智能户外开关箱，以及至少两个变电站的两段母线，其中一个变电站的第一段母线的出线开关引出连接若干个智能户外开关箱后，并连接至第二段母线的出线开关，以组成一闭环，另一个变电站的第一段母线的出线开关引出连接若干个智能户外开关箱后，并连接至第二段母线的出线开关，以组成另一闭环， 一闭环和另一闭环通过智能户外开关箱之间的电缆连接形成闭环工字型配电网；闭环中相互连接的开关均采用断路器开关，且每个智能户外开关箱内断路器开关均由集中式DTU 7.1控制。
本发明的闭环工字型配电网故障隔离和快速恢复供电的方法基于上述闭环工字型配电网网架结构。该结构将两闭环通过联络单元的联络线实现不同电源的互联，增加线路转供电的路径。
断路器开关根据功能的不同划分为环进断路器开关、环出断路器开关、内馈线断路器开关和联络断路器开关。
环进断路器开关、环出断路器开关在智能户外开关箱正常运行时均为闭合状态。
以图4-7所示，进一步说明本发明的故障处理办法。图4-7中，变电站A、变电站B分别为两个变电站两段母线的出线开关。每个智能户外开关箱内设有环进断路器开关1、环出断路器开关2，以及第一内馈线断路器开关3、第二内馈线断路器开关4、第三内馈线断路器开关5和第四内馈线断路器开关6；其中，变电站A中第四个智能户外开关箱的第四内馈线断路器开关6用作联络断路器开关，并通过光纤连接变电站B的第十四个智能户外开关箱的第四内馈线断路器开关6，第十四个智能户外开关箱的第四内馈线断路器开关6用作联络断路器开关。
1)、开关箱间发生第一次故障，如图4所示：
A、故障发生在第二、第三智能户外开关箱之间，第二智能户外开关箱的环出断路器开关2与第三智能户外开关箱的环进断路器开关1检测到差动电流。
B、由于检测到差动电流并达到整定值，第二智能户外开关箱的环出断路器开关2与第三智能户外开关箱的环进断路器开关1同时跳开，隔离故障。
C、由于闭环工字型网架，故障隔离后，非故障区域不会产生停电。
2)、开关箱间同时发生第二次故障，如图5所示：
A、在上述1)故障未处理完毕，未恢复正常运行状态期间，第五、第六智能户外开关箱之间再次发生故障，第五智能户外开关箱的环出断路器开关2与第六智能户外开关箱的环进断路器开关1检测到差动电流。
B、由于检测到差动电流并达到整定值，第五智能户外开关箱的环出断路器开关2与第六智能户外开关箱的环进断路器开关1同时跳开，隔离故障。
C、此时，第三、第四、第五智能户外开关箱的非故障区域失电，第四智能户外开关箱的第四内馈线断路器开关6用作联络断路器开关，并启动备自投转供策略，合上第四智能户外开关箱的第四内馈线断路器开关6，完成非故障区域的恢复供电的自愈控制。
3)智能户外开关箱母线故障，如图6所示：
A、第二智能户外开关箱发生内部故障，第二智能户外开关箱的集中式DTU 7.1检测到母线差动电流。
B、由于检测到母线差动电流并达到整定值，第二智能户外开关箱的环进断路器开关1、环出断路器开关2，以及第一内馈线断路器开关3、第二内馈线断路器开关4、第三内馈线断路器开关5和第四内馈线断路器开关6同时跳开，隔离故障。
C、由于闭环工字型网架，故障隔离后，非故障区域不会产生停电。
4)智能户外开关箱馈线故障，如图7所示：
A、第三智能户外开关箱发生的馈出线发生故障，第三智能户外开关箱的集中式DTU 7.1检测到第二内馈线断路器开关4馈出线出现故障电流。
B、由于检测到第三智能户外开关箱中第二内馈线断路器开关4馈出线出现故障电流并达到整定值，第三智能户外开关箱的第二内馈线断路器开关4跳开，隔离故障。
C、馈出线故障不需转供。
上述为本发明的优选方案，显示和描述了本发明的基本原理、主要特征和本发明的优点。本领域的技术人员应该了解本发明不受上述实施例的限制，上述实施例和说明书中描述的只是说明本发明的原理，在不脱离本发明精神和范围的前提下本发明还会有各种变化和改进，这些变化和改进都落入要求保护的本发明范围内。本发明要求保护范围由所附的权利要求书及其等同物界定。

Claims (8)

  1. 一种智能户外开关箱，包括进线PT及DTU间隔(7)、一个以上的断路器间隔(8)和母线PT间隔(9)，PT及DTU间隔(7)包括互为电连接的集中式DTU(7.1)和进线电压互感器，每个断路器间隔(8)均设有电流互感器(8.1)和断路器开关，母线PT间隔(9)设有电压互感器(9.1)，其特征在于：集中式DTU(7.1)和每个断路器间隔(8)的电流互感器(8.1)电连接，集中式DTU(7.1)和电压互感器(9.1)电连接，以使集中式DTU(7.1)将所有间隔的电压、电流、断路器开关状态进行采集。
  2. 根据权利要求1所述智能户外开关箱，其特征在于：每个断路器间隔(8)均设有真空断路器(8.2)。
  3. 根据权利要求1所述智能户外开关箱，其特征在于：集中式DTU(7.1)设有用于连接另一智能户外开关箱的光纤接口，每个智能户外开关箱之间设有通讯模块；集中式DTU(7.1)将采集的电压、电流、断路器开关状态进行处理，通过光纤于通讯模块连接；每个智能户外开关箱之间通过通讯模块采用光纤连接，实现信息的交互。
  4. 根据权利要求1所述智能户外开关箱，其特征在于：集中式DTU(7.1)，以及每个断路器间隔(8)、母线PT间隔(9)的操作机构均由进线PT及DTU间隔(7)的进线电压互感器二次侧供电。
  5. 根据权利要求1-4任一项所述智能户外开关箱，其特征在于：集中式DTU(7.1)将所有间隔的电压、电流、断路器开关状态进行采集，每个智能户外开关箱之间进行信息交互，以使集中式DTU(7.1)具备用于实现故障快速定位与隔离的光纤差动保护模块，光纤差动保护模块至少包括电压互感器；集中式DTU(7.1)具备用于实现智能户外开关箱内部故障时快速定位与隔离的母线差动保护模块；集中式DTU(7.1)具备用于实现异常情况下故障快速定位与隔离的后备保护模块，集中式DTU(7.1)具备用于实现故障隔离后的快速恢复供电的备自投模块；后备保护模块和备自投模块分别至少包括联络断路器开关。
  6. 一种闭环工字型配电网，包括权利要求1所述智能户外开关箱，以及至少两个变电站的两段母线，其特征在于：其中一个变电站的第一段母线的出线开关引出连接若干个智能户外开关箱后，并连接至第二段母线的出线开关，以组成一闭环，另一个变电站的第一段母线的出线开关引出连接若干个智能户外开关箱后，并连接至第二段母线的出线开关，以组成另一闭环，一闭环和另一闭环通过智能户外开关箱之间的电缆连接形成闭环工字型配电网；闭环中相互连接的开关均采用断路器开关，且每个智能户外开关箱内断路器开关均由集中式DTU(7.1)控制。
  7. 根据权利要求6所述闭环工字型配电网，其特征在于：断路器开关根据功能的不同划分为环进断路器开关、环出断路器开关、内馈线断路器开关和联络断路器开关。
  8. 根据权利要求7所述闭环工字型配电网，其特征在于：环进断路器开关、环出断路器开关在智能户外开关箱正常运行时均为闭合状态。
PCT/CN2020/092607 2020-01-09 2020-05-27 一种智能户外开关箱及其闭环工字型配电网 WO2021139071A1 (zh)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN202010023898.X 2020-01-09
CN202010023898.XA CN111049270A (zh) 2020-01-09 2020-01-09 一种智能户外开关箱及其闭环工字型配电网

Publications (1)

Publication Number Publication Date
WO2021139071A1 true WO2021139071A1 (zh) 2021-07-15

Family

ID=70244266

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/CN2020/092607 WO2021139071A1 (zh) 2020-01-09 2020-05-27 一种智能户外开关箱及其闭环工字型配电网

Country Status (2)

Country Link
CN (1) CN111049270A (zh)
WO (1) WO2021139071A1 (zh)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113904326A (zh) * 2021-09-27 2022-01-07 深圳供电局有限公司 一种城市配电网接线模式
CN114137337A (zh) * 2021-11-17 2022-03-04 中国南方电网有限责任公司超高压输电公司广州局 一种换流站ct配置死区检查的自动检验方法
CN114400628A (zh) * 2021-12-20 2022-04-26 广西润电风能(北流)有限公司 一种能够缩小故障影响范围的风电场集电线路控制方法
CN116545535A (zh) * 2023-06-09 2023-08-04 江苏泽宇智能电力股份有限公司 一种带有异缆保护的光纤通信机房终端
CN116780747A (zh) * 2023-07-04 2023-09-19 国网江苏省电力有限公司宿迁供电分公司 一种提高分段备自投电压断线时动作正确率的方法

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111049270A (zh) * 2020-01-09 2020-04-21 赫兹曼电力（广东）有限公司 一种智能户外开关箱及其闭环工字型配电网
CN111555249A (zh) * 2020-05-25 2020-08-18 国网重庆市电力公司电力科学研究院 一种分布式配电网保护***
CN112491033A (zh) * 2020-10-10 2021-03-12 广西电网有限责任公司电力科学研究院 一种户外开关箱自动化设备控制电路
CN113098591B (zh) * 2021-02-24 2022-04-01 云谷技术(珠海)有限公司 一种分布式dtu光纤差动保护电路
CN113036727B (zh) * 2021-03-12 2022-08-30 国网江苏省电力有限公司常州供电分公司 分布式电流差动保护***和方法
TWI826232B (zh) * 2023-01-10 2023-12-11 匯明有限公司 電力匯流排設備及包含其之電力管理系統

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN201118280Y (zh) * 2007-08-24 2008-09-17 郭黎 一种低压电网自动监控***
CN202997335U (zh) * 2013-01-15 2013-06-12 长兴县供电局 一种环网柜
JP2014203138A (ja) * 2013-04-01 2014-10-27 富士電機株式会社 電子装置、検証方法及び検証プログラム
CN208835577U (zh) * 2018-08-28 2019-05-07 湖南创业德力电气有限公司 一种智能型充气式环网柜
CN111049270A (zh) * 2020-01-09 2020-04-21 赫兹曼电力（广东）有限公司 一种智能户外开关箱及其闭环工字型配电网

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN201118280Y (zh) * 2007-08-24 2008-09-17 郭黎 一种低压电网自动监控***
CN202997335U (zh) * 2013-01-15 2013-06-12 长兴县供电局 一种环网柜
JP2014203138A (ja) * 2013-04-01 2014-10-27 富士電機株式会社 電子装置、検証方法及び検証プログラム
CN208835577U (zh) * 2018-08-28 2019-05-07 湖南创业德力电气有限公司 一种智能型充气式环网柜
CN111049270A (zh) * 2020-01-09 2020-04-21 赫兹曼电力（广东）有限公司 一种智能户外开关箱及其闭环工字型配电网

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113904326A (zh) * 2021-09-27 2022-01-07 深圳供电局有限公司 一种城市配电网接线模式
CN113904326B (zh) * 2021-09-27 2023-09-12 深圳供电局有限公司 一种城市配电网接线模式
CN114137337A (zh) * 2021-11-17 2022-03-04 中国南方电网有限责任公司超高压输电公司广州局 一种换流站ct配置死区检查的自动检验方法
CN114137337B (zh) * 2021-11-17 2023-11-10 中国南方电网有限责任公司超高压输电公司广州局 一种换流站ct配置死区检查的自动检验方法
CN114400628A (zh) * 2021-12-20 2022-04-26 广西润电风能(北流)有限公司 一种能够缩小故障影响范围的风电场集电线路控制方法
CN116545535A (zh) * 2023-06-09 2023-08-04 江苏泽宇智能电力股份有限公司 一种带有异缆保护的光纤通信机房终端
CN116545535B (zh) * 2023-06-09 2024-03-29 江苏泽宇智能电力股份有限公司 一种带有异缆保护的光纤通信机房终端
CN116780747A (zh) * 2023-07-04 2023-09-19 国网江苏省电力有限公司宿迁供电分公司 一种提高分段备自投电压断线时动作正确率的方法

Also Published As

Publication number Publication date
CN111049270A (zh) 2020-04-21

Similar Documents

Publication Publication Date Title
WO2021139071A1 (zh) 一种智能户外开关箱及其闭环工字型配电网
CN109193582B (zh) 一种智能配电网区域保护控制***及控制方法
CN107069676A (zh) 配电网故障定位及快速隔离恢复控制方法
CN105140894A (zh) 一种基于相位差原理的配电网差动保护方法
CN109713794B (zh) 一种分布式智能自恢复***及方法
CN109149575A (zh) 一种环网单元及双环网型配电网
CN110932258A (zh) 一种钻石型配电网
CN111030058B (zh) 一种基于5g通信的配电网分区保护方法
CN111082423B (zh) 一套配电网快速自愈方法
CN106026088A (zh) 基于负荷分层分区转移的配电网自动化策略
CN110120664A (zh) 一种智能可靠城市配电网网架结构
CN112366809A (zh) 一种带有新能源的纵联电站备自投装置
CN208862570U (zh) 环网单元及双环网型配电网
CN113013851B (zh) 一种分布式智能配电自动化***
CN110635562A (zh) 一种自适应区域备自投装置及自适应区域备自投方法
CN109613394A (zh) 一种智能分布加电压时间型就地故障区段判别方法
CN209516723U (zh) 一种10KV高压0.5s备自投投切***
CN113346481A (zh) 110kV链式结构变电站的自愈***及自愈方法
CN112967904A (zh) 一种换流变压器用瓦斯继电器的接线结构及信号输出方法
CN216599136U (zh) 一种具有自愈功能的自动化配电网***
Amarnath et al. Prevention of power blackout and power theft using IED
CN211556980U (zh) 一种智能户外开关箱及其闭环工字型配电网
CN110943535A (zh) 一种供电控制***
Zhou Protection and control scheme of intelligent distributed distribution network and its secondary system design
CN214755726U (zh) 双主电网智能组态控制***

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 20911665

Country of ref document: EP

Kind code of ref document: A1

NENP Non-entry into the national phase

Ref country code: DE

122 Ep: pct application non-entry in european phase

Ref document number: 20911665

Country of ref document: EP

Kind code of ref document: A1