CN105933141B - Networking method for inter-station communication under hybrid multi-terminal DC topology - Google Patents

Networking method for inter-station communication under hybrid multi-terminal DC topology Download PDF

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CN105933141B
CN105933141B CN201610218525.1A CN201610218525A CN105933141B CN 105933141 B CN105933141 B CN 105933141B CN 201610218525 A CN201610218525 A CN 201610218525A CN 105933141 B CN105933141 B CN 105933141B
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station
network
communication
data
channel
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CN105933141A (en
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胡兆庆
董云龙
卢宇
李海英
曹冬明
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NR Electric Co Ltd
NR Engineering Co Ltd
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NR Electric Co Ltd
NR Engineering Co Ltd
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L41/00—Arrangements for maintenance, administration or management of data switching networks, e.g. of packet switching networks
    • H04L41/06—Management of faults, events, alarms or notifications
    • H04L41/0654—Management of faults, events, alarms or notifications using network fault recovery
    • H04L41/0663—Performing the actions predefined by failover planning, e.g. switching to standby network elements
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L43/00—Arrangements for monitoring or testing data switching networks
    • H04L43/10—Active monitoring, e.g. heartbeat, ping or trace-route
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L47/00—Traffic control in data switching networks
    • H04L47/70—Admission control; Resource allocation
    • H04L47/72—Admission control; Resource allocation using reservation actions during connection setup
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04Q—SELECTING
    • H04Q11/00—Selecting arrangements for multiplex systems
    • H04Q11/0001—Selecting arrangements for multiplex systems using optical switching
    • H04Q11/0005—Switch and router aspects

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Health & Medical Sciences (AREA)
  • Cardiology (AREA)
  • General Health & Medical Sciences (AREA)
  • Optical Communication System (AREA)
  • Data Exchanges In Wide-Area Networks (AREA)

Abstract

The present invention relates to the network-building methods communicated between standing under a kind of mixing multiterminal element topology; and the communication monitoring mechanism that corresponding the method generates; this method will stand interior SDH/MSTP equipment as device talk between realizing station and interconnect Intermediate connection device; to use Ethernet LAN business; it is to stand interior control protective unit by the networking of 100 m ethernet access switch using connection type, SDH network is then accessed by SDH/MSTP equipment.Communication effect is that control command and running state information are exchanged between conventional current source converter station and voltage-source type converter station between the station, communication is using pair connection type of net mutual backup between standing, it forms and uses point-to-point interconnection between multiple stations of mixed DC topology, there is the interface channel to other stations from any one station, the interface channel uses optical-fibre channel mode, and optical cable follows buried cable or sea cable between each station to be laid with.

Description

The network-building method communicated between standing under mixing multiterminal element topology
Technical field
The invention belongs to direct current transportation fields, in particular to a kind of to mix the networking side communicated between station under multiterminal element topology Method.
Background technique
Flexible DC transmission uses voltage source converter, can exchange system with separately adjustable active and idle transmission, raising The ability to transmit electricity of system, is readily configured multi-terminal direct current transmission system, the electricity generation grid-connecting of renewable energy, isolated island urban electricity supply and The application fields such as AC system interconnection, have apparent competitiveness.
Mix multiterminal element topology and optical cable with direct current cables be laid with signal as shown in Figure 1, by four station for, for Communicated between the multistation of mixed DC, it is desirable that between any two station can high speed communication, and do not increase additional logical of substation Interrogate equipment.
For both ends DC converter station topology in, frequently with a kind of mode be point-to- point communication, this mode be utilize Communication channel switching device between standing inputs and covers input signals for control system is double, and output is the communication channel switching dress that missed the stop The data for being selected as effective system are set, effective system refers to that the double sets of control system are currently at a set of of effective status, works as control After the double set switchings of system, the effective system data transmission after the selection of communication channel switching device switches between standing, the choosing of valid data It selects and is not realized in control protected host, it is possible to reduce the code of control protected host selection mitigates load on host computers, protects in control In protecting system in this mode shown in connection schematic diagram See Figure 2.
Interior communication function is mainly realized by Communication Card and channel switching device in Fig. 2.It is main to complete DC control It is communicated between the station of protection system with interpolar.Channel switching device has channel to switch board, to the interior communication from redundant system Channel switches over.MUX is the attachment device of connection control protection equipment and optical fiber communication equipment in figure.
But this mode is suitable only for point-to- point communication between two stations, for communicating between the multistation of mixed DC, presses It not only needs control protective unit side that muti-piece Communication Card is installed according to this mode, and needs more channel switching devices, especially It forms AB net, and device and board quantity will multiply in 2, uneconomical and increase complexity of establishing network.Therefore herein for this Kind drawback proposes a kind of network-building method for mixing and communicating between station under multiterminal element topology.
Summary of the invention
It is an object of the present invention to provide the network-building methods communicated between standing under a kind of mixing multiterminal element topology, simplify between standing Communication modes economize on resources.
Two interchangers are set at each station, separately constitute A, B net.A, B network switch and pole control protection A set are controlled with pole System protection B set uses cross-connection system, and A, B net use identical connection, controls protected host to any a set of pole, together When receive A, B network data, but only with one of network data, as spare, interchanger does not have itself another network data Valid data handover mechanism, directly forwarding receive data, and pole controls protected host and passes through high speed between optical communication board realization host Fiber optic Ethernet communicates and monitoring, the selection of A, B network data are realized by host internal logic, setting principle are as follows:
All normally or all in the case where exception, A covers Systematic selection A network data for A net and B net, and B covers Systematic selection A network data Or A net and B net are all under normal circumstances, A, B set system all select one of network data as valid data；
A net is normal, in the case where B net exception, selects A network data；
A net is abnormal, and B is netted in normal situation, selects B network data；
As designated lane, designated lane is laid with the above A net with DC line, B net be other channel time-sharing multiplexings or Using communication channel between the station 2Mbit/s being syncopated as, two sets of hosts in activestandby state at each station monitor the receipts of itself Channel, while the whether unobstructed signal of the communication for receiving channel is sent back into transmitting terminal.It is also mutually sent out between the host mutually communicated between standing The heartbeat message signal for giving itself judges that the abnormal method of A, B net is: being sent by receiving other station hosts by A, B net Data effective marker, fiber data verification error flag and heartbeat signal, as long as these three types of have an error to be considered as from this Net receives data exception, another channel reception data is switched to, while the host is alarmed, only when host A B net is all examined After measuring failure, it is just switched to backup host, continues to monitor A, B net state.During if mixed DC system operated normally, host AB detects the AB net failure of itself, is selected as alarm or tripping.
The network-building method communicated between standing under the above mixing multiterminal element topology, the interior SDH/MSTP equipment that will stand is as real Device talk interconnects Intermediate connection device between now standing, and is control in station using connection type to use Ethernet LAN business Then protective device accesses SDH network by SDH/MSTP equipment by the networking of 100 m ethernet access switch.It is described above MSTP (multi-service transport platform based on SDH) refers to, realizes connecing for the business such as TDM, ATM, Ethernet simultaneously based on SDH platform Enter, handle and transmit, the multi-service node of united net management is provided, by accessing device talk bandwidth in equipment unified distribution station, Communication bandwidth resource total in station is increased since mixing multistation direct current system is newly laid with optical cable with direct current cables, by above-mentioned MSTP Fiber optic communications resource allocation will be newly laid with to use to Control protection system in standing.Protection does not use special communication passage, shares straight Communication channel between flow control station.
The network-building method communicated between standing under mixing multiterminal element topology as described above, heartbeat signal is in control protected host It is realized on host CPU plate.The judgement whether heartbeat message crashes as a host can be sent to opposite end by main inter-machine communication. Receiving end by the effective marker phase of the receiving channel of the opposite end heartbeat message and this side that receive with, for differentiate with opposite side host Communication channel it is whether unobstructed.Consider communication channel transmission delay, judges that heartbeat signal loses and add delay t, t value model in criterion Enclose 1ms~1s.
The network-building method communicated between standing under mixing multiterminal element topology as described above, networking mode use the point-to-point side of multichannel Formula, using the interchanger with optical communication interface and cable interface, 1 Dao n port of n converter station interchanger in each station Be set separately be connected to station 1 arrive at a station n interchanger on, the interior corresponding interchanger port identical with station number in each station station does not connect, often The pole control protection A set at a station is coupled with the optical communication interface end of the station interchanger with pole control protection B set.
Between standing under mixing multiterminal element topology as described above in the network-building method that communicates, previously according to communicating number between multistation According to amount, communication channel delay requires to determine the bandwidth requirement needed, then carries out in station for the bandwidth that DC control and protection system is reserved Comparison decides whether using reserved channel.If reserved channel is smaller using bandwidth chahnel than DC control protection, protected in control 100M interchanger outlet in side increases bandwidth conversion equipment.Or reduce communication data between DC control protection station.
After adopting the above scheme, the invention has the benefit that
The present invention provides a kind of network-building method for mixing and communicating between station under multiterminal element topology, in the mixing soft straight topology of multiterminal In, in this manner when networking AB, control protective unit side installation muti-piece Communication Card is not needed, the channel Duo Tai is not needed yet Switching device simplifies communication modes between station, economizes on resources.
Detailed description of the invention
Fig. 1 is mixed DC topology and optical cable with direct current cables laying schematic diagram；
Fig. 2 is point-to- point communication building mode between conventional two stations, according to point-to-point two station pole Control protection system of mode Communication connection schematic diagram between standing；
Fig. 3 is communication network connection schematic diagram in mixed DC multistation station；
Fig. 4 is mixed DC multistation external communication network connection schematic diagram.
Specific embodiment
The network-building method that (Fig. 1) is communicated between standing under a kind of mixing multiterminal element is topological, as shown in figure 3, being arranged at each station Two interchangers, separately constitute A, B net.A, B network switch and pole control protection A set with pole control protection B set use intersect company Mode is connect, A, B net use identical connection, protected host is controlled to any a set of pole, while receiving A, B network data, But only with one of network data, for another network data as spare, interchanger itself does not have valid data handover mechanism, Directly forwarding receives data, and pole controls protected host and passes through high speed fibre ethernet communication and prison between optical communication board realization host Depending on the selection of A, B network data is realized by host internal logic, setting principle are as follows:
All normally or all in the case where exception, A covers Systematic selection A network data for A net and B net, and B covers Systematic selection A network data Or A net and B net are all under normal circumstances, A, B set system all select one of network data as valid data；
A net is normal, in the case where B net exception, selects A network data；
A net is abnormal, and B is netted in normal situation, selects B network data.
The above A net is designated lane, and designated lane is laid with DC line, and B net is other channel time-sharing multiplexings or makes With communication channel between the station 2Mbit/s being syncopated as, two sets of hosts in activestandby state at each station monitor that the receipts of itself are logical Road, while the whether unobstructed signal of the communication for receiving channel is sent back into transmitting terminal.It is also mutually sent between the host mutually communicated between standing The heartbeat message signal of itself judges that the abnormal method of A, B net is: the number sent by receiving other station hosts by A, B net According to effective marker, fiber data verification error flag and heartbeat signal, as long as these three types of have an error to be considered as from the net Data exception is received, another channel reception data is switched to, while the host is alarmed, only when host A B net all detects To after failure, it is just switched to backup host, continues to monitor A, B net state.During if mixed DC system operated normally, host A B The AB net failure for all detecting itself, is selected as alarm or tripping.
The network-building method communicated between standing under the above mixing multiterminal element topology, as shown in figure 4, SDH/MSTP in standing Equipment interconnects Intermediate connection device as device talk between realizing station, to use Ethernet LAN business, using connection type It is that in standing then control protective unit accesses SDH net by SDH/MSTP equipment by the networking of 100 m ethernet access switch Network.MSTP (multi-service transport platform based on SDH) described above refers to, realizes TDM, ATM, ether simultaneously based on SDH platform Access, processing and the transmission of the business such as net, provide the multi-service node of united net management, are set by access in equipment unified distribution station Standby communication bandwidth increases communication bandwidth money total in station since mixing multistation direct current system is newly laid with optical cable with direct current cables Source will newly be laid with fiber optic communications resource allocation by above-mentioned MSTP and use to Control protection system in standing.Protection does not use dedicated logical Channel is interrogated, communication channel between DC control station is shared.
The network-building method communicated between standing under mixing multiterminal element topology as described above, heartbeat signal is in control protected host It is realized on host CPU plate.The judgement whether heartbeat message crashes as a host can be sent to opposite end by main inter-machine communication. Receiving end by the effective marker phase of the receiving channel of the opposite end heartbeat message and this side that receive with, for differentiate with opposite side host Communication channel it is whether unobstructed.Consider communication channel transmission delay, judges that heartbeat signal loses and add delay t, t value in criterion Range 1ms~1s.
The network-building method communicated between standing under mixing multiterminal element topology as described above, networking mode use the point-to-point side of multichannel Formula, using the interchanger with optical communication interface and cable interface, 1 Dao n port of n converter station interchanger in each station Be set separately be connected to station 1 arrive at a station n interchanger on, the interior corresponding interchanger port identical with station number in each station station does not connect, often The pole control protection A set at a station is coupled with the optical communication interface end of the station interchanger with pole control protection B set.
Between standing under mixing multiterminal element topology as described above in the network-building method that communicates, previously according to communicating number between multistation According to amount, communication channel delay requires to determine the bandwidth requirement needed, then carries out in station for the bandwidth that DC control and protection system is reserved Comparison decides whether using reserved channel.If reserved channel is smaller using bandwidth chahnel than DC control protection, protected in control 100M interchanger outlet in side increases bandwidth conversion equipment, and if the Ethernet of Fig. 2 dotted portion turns 2M device, another method is It reduces DC control and protects communication data between station.It, can be with but if reserved channel is bigger using bandwidth chahnel than DC control protection The Ethernet for removing dotted portion turns 2M device.
The above embodiments are merely illustrative of the technical scheme of the present invention and are not intended to be limiting thereof, although those skilled in the art After reading the application, various modifications or change are carried out referring to this present invention of above-described embodiment, but these modifications or change are in Shen Please pending right application of the invention it is claimed within the scope of.

Claims (5)

1.混合多端直流拓扑下站间通讯的组网方法，其特征在于:在每个站设置两个交换机，分别组成A、B网,A、B网采用完全相同的接法，A、B网交换机与极控制保护A套主机、极控制保护B套主机采用交叉连接方式，对任意一套极控制保护主机，同时接收到A、B网数据，但只采用其中一个网数据，另外一个网数据作为备用，交换机转发收到数据，极控制保护主机通过光通讯板卡实现控制主机间高速光纤以太网通讯及监视，A、B网数据的选择由控制主机内部逻辑实现，设定原则为：1. the networking method of inter-station communication under the mixed multi-terminal DC topology, it is characterized in that: two switches are set at each station, respectively form A, B network, A, B network adopt identical connection method, A, B network The switch is cross-connected with the pole control and protection set A host and the pole control protection set B set of hosts. For any set of pole control protection hosts, it receives the data of the A and B networks at the same time, but only the data of one network is used, and the data of the other network is used. As a backup, the switch forwards the received data, and the polar control protection host realizes high-speed optical fiber Ethernet communication and monitoring between the control hosts through the optical communication board. The selection of network A and B data is realized by the internal logic of the control host. The setting principles are: A网和B网都正常或都异常的情况下，A套系统选择A网数据，B套系统选择A网数据.When both the A network and the B network are normal or abnormal, the A system selects the A network data, and the B system selects the A network data. A网正常，B网异常的情况下，选择A网数据；If network A is normal and network B is abnormal, select the data of network A; A网异常，B网正常的情况下，选择B网数据；When network A is abnormal and network B is normal, select network B data; 将A、B网中的一个设定为专用通道，专用通道随直流线路铺设，另一个设定为其他通道分时复用或者使用切分出的站间通讯通道，每个站的两套处于主备状态的主机都监视自身的收通道，同时将收通道的通讯是否通畅的信号传送回发送端；One of the A and B networks is set as a dedicated channel, the dedicated channel is laid with the DC line, and the other is set as the time-division multiplexing of other channels or the split inter-station communication channel is used, and the two sets of each station are in The hosts in the active and standby states monitor their own receiving channels, and at the same time transmit the signal of whether the communication of the receiving channels is smooth or not back to the sender; 站间相互通讯的主机间相互发送自身的心跳报文信号，判断A、B网异常的方法是：通过接收其他站主机通过A、B网发送的数据有效标志、光纤数据校验出错标志以及心跳报文信号，这三类信号只要有一个出错就认为从该网接收数据异常，切换到另外一个通道接收数据，同时该主机报警；The hosts that communicate with each other between stations send their own heartbeat message signals to each other, and the method to judge the abnormality of the A and B networks is: by receiving the data valid flags sent by other station hosts through the A and B networks, the optical fiber data verification error flag and the heartbeat Message signal, as long as there is an error in these three types of signals, it is considered that the data received from the network is abnormal, and it switches to another channel to receive data, and the host alarms at the same time; 当主机的A、B网都检测到故障后，才切换到备用主机，继续监视A、B网状态；如果混合直流系统正常运行中，主机A、B都检测到自身的A、B网故障，选择为报警或者跳闸。When both the A and B networks of the host have detected the failure, they will switch to the standby host and continue to monitor the status of the A and B networks; Select Alarm or Trip. 2.如权利要求1所述的混合多端直流拓扑下站间通讯的组网方法，其特征在于，将站内SDH/MSTP设备作为实现站间设备通讯互联中间连接设备；2. the networking method of inter-station communication under the hybrid multi-terminal direct current topology as claimed in claim 1, it is characterized in that, with SDH/MSTP equipment in the station as the intermediate connection equipment that realizes inter-station equipment communication interconnection; 采用的连接方式是站内控制保护装置通过以太网接入交换机组网，然后通过SDH/MSTP设备接入SDH网络；The connection method adopted is that the control and protection device in the station is connected to the switch network through Ethernet, and then connected to the SDH network through SDH/MSTP equipment; 所述MSTP是基于SDH的多业务传送平台，具体是指基于SDH平台同时实现TDM、ATM、以太网的接入、处理和传送，提供统一网管的多业务节点,由该设备统一分配站内接入设备通讯带宽，当混合多站直流系统随直流电缆新铺设光缆增加了站内总的通讯带宽资源时，由上述MSTP将新铺设光缆通讯资源分配给站内控制保护系统使用；The MSTP is a multi-service transmission platform based on SDH, and specifically refers to a multi-service node that simultaneously realizes access, processing and transmission of TDM, ATM, and Ethernet based on the SDH platform, and provides unified network management. Equipment communication bandwidth, when the hybrid multi-station DC system increases the total communication bandwidth resources in the station with the newly laid optical cable of the DC cable, the above MSTP allocates the communication resources of the newly laid optical cable to the control and protection system in the station for use; 保护过程不采用专用通讯通道，合用直流控制站间通讯通道。The protection process does not use a dedicated communication channel, and the communication channel between the DC control stations is shared. 3.如权利要求1所述的混合多端直流拓扑下站间通讯的组网方法，其特征在于，所述心跳报文信号在控制保护主机的主CPU板上实现；3. the networking method of inter-station communication under the hybrid multi-terminal direct current topology as claimed in claim 1, is characterized in that, described heartbeat message signal is realized on the main CPU board of control protection mainframe; 心跳报文信号作为一个主机是否死机的判断，通过主机间通讯发送到对端；接收端将接收到的对端心跳报文和本侧的接收通道有效标识位相与，用于判别与对侧主机的通讯通道是否通畅；针对通讯通道传输延时，判断心跳信号失去判据中加延时t，t取值范围1ms～1s。The heartbeat message signal is used to judge whether a host is dead or not, and is sent to the opposite end through the communication between the hosts; the receiving end sums the received heartbeat message from the opposite end and the valid identification bit of the receiving channel on the local side, which is used to determine whether it is connected with the opposite host. Whether the communication channel is unobstructed; for the transmission delay of the communication channel, add a delay t to the criterion for judging the loss of the heartbeat signal, and the value of t ranges from 1ms to 1s. 4.如权利要求1所述的混合多端直流拓扑下站间通讯的组网方法，其特征在于，A、B网的组网方式采用多路点对点方式，每个站内采用带有光纤通讯接口以及网线接口的交换机，n个换流站交换机的1到n端口分别设定接到站1到站n的交换机上，每个站站内对应的交换机与站号相同的端口不接入网线，每个站的极控制保护A套与极控制保护B套分别接到该站交换机的光通讯接口端。4. the networking method of inter-station communication under the hybrid multi-terminal DC topology as claimed in claim 1, it is characterized in that, the networking mode of A, B network adopts multi-way point-to-point mode, and in each station adopts optical fiber communication interface and For switches with network cable interface, ports 1 to n of the switches of n converter stations are set to be connected to the switches of station 1 to station n respectively. The corresponding switch in each station and the port with the same station number are not connected to network cables. The pole control protection set A and pole control protection set B of the station are respectively connected to the optical communication interface end of the switch of the station. 5.如权利要求2所述的混合多端直流拓扑下站间通讯的组网方法中，其特征在于，预先根据多站之间通讯数据量，通道延时要求确定需要的带宽要求，再和站内为直流控制保护系统预留的带宽进行对比，决定是否采用预留通道；如果预留通道比直流控制保护使用通道带宽小，在控制保护侧交换机出口增加带宽转换设备，或者减少直流控制保护站间通讯数据。5. in the networking method of inter-station communication under the hybrid multi-terminal DC topology as claimed in claim 2, it is characterized in that, in advance according to the amount of communication data between multiple stations, the channel delay requirement determines the required bandwidth requirements, and then communicates with the in-station. Compare the bandwidth reserved for the DC control and protection system to decide whether to use the reserved channel; if the bandwidth of the reserved channel is smaller than that of the channel used for the DC control and protection, add a bandwidth conversion device at the switch outlet on the control and protection side, or reduce the number of DC control and protection stations. communication data.
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