CN101604474B - Time-division multiplexing alternating current sampling method for digital substation based on VLAN technology - Google Patents
Time-division multiplexing alternating current sampling method for digital substation based on VLAN technology Download PDFInfo
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Abstract
The invention relates to a time-division multiplexing alternating current sampling method for a digital substation based on VLAN technology, which comprises the following steps of: transmitting a sampling signal of each alternate combiner to an input port of an exchanger and outputting the sampling signal to a protective measuring and controlling device by the exchanger through an output port of the exchanger. The method also comprises a step of realizing automatic switch or controlled switch of time-division multiplexing alternating current sampling through the exchanger so that only one set of VLAN data is output from the output port in a certain timeslice. Therefore, the time-division multiplexing alternating current sampling method can receive the acquirement of a plurality of alternating current signals at intervals or even alternating current signals of the whole substation through the configuration of the measuring and controlling device with an Ethernet interface, reduces the configuration of the measuring and controlling device, simplifies the system design and reduces the equipment cost and the system configuration cost.
Description
Technical field
The invention belongs to Automation of Electric Systems control field, particularly a kind of time-division multiplexing alternating current sampling method for digital substation based on vlan technology.
Background technology
At present, in operation of the pilot of domestic large quantities of digital transformer substations and the conventional substation digital improvement, dispose process layer digital equipment, be used for the secondary voltage magnitude of current is sampled on the spot, realized the simulating signal in-situ digitalization.In most of digital transformer substations; the analog quantity digitizer generally adopts electronic mutual inductor; electronic mutual inductor is made up of in-site collecting module and merge cells (MU), and merge cells is the analog signals of acquisition module collection on the spot, sends the protection measure and control device to by communication mode.Merge cells generally provides Ethernet interface, and the AC sampling data message that meets IEC61850-9-1 or IEC 61850-9-2 standard is provided by this interface.The protection measure and control device obtains above-mentioned analog signals from merge cells, calculates then and analyzes.Time-division multiplexing alternating current sampling method is exactly that the analog signals that adopts time-multiplexed method that a plurality of combiners are provided is given a kind of method that measure and control device calculates and analyzes.
In the digital transformer substation, owing to adopted electronic mutual inductor, the sampling of analog signals is changed on the spot, and electronic mutual inductor will be delivered to the protection measure and control device on the mode of data by communication that collect.If the protection measure and control device need be gathered the AC signal at a plurality of intervals, generally adopt two kinds of methods: a kind of method is to comprise that measure and control device disposes a plurality of Ethernet interfaces, and each interface links to each other with combiner, receives sampled data.Another kind method is, is connected to switch with being configured in each combiner at interval, and the communication port of protection measure and control device also is connected to switch, obtains sampled data by network.When adopting first method, the protection measure and control device need dispose a plurality of Ethernet interfaces, the hardware configuration complexity of device.When adopting second method; because the communication capacity of switch is limited; its network throughput is also limited, and the requirement of protection measure and control device processing power is improved along with handling increase at interval, and the port number that therefore can insert the protection measure and control device is limited.
Summary of the invention
The objective of the invention is to overcome the deficiencies in the prior art, a kind of time-division multiplexing alternating current sampling method for digital substation based on vlan technology is provided, have the outstanding advantage that is not subjected to the restriction of sampling interval number, thereby simplify hardware configuration, enlarge the scope of application.
The present invention solves its technical matters and is achieved through the following technical solutions:
A kind of time-division multiplexing alternating current sampling method for digital substation based on vlan technology; may further comprise the steps: the sampled signal of each interval combiner transfers to the input port of switch; switch exports sampled signal to the protection measure and control device by its output port; it is characterized in that: also comprise by switch and realize the step that the time-division multiplexing alternating current sampling is automaticallyed switch, be specially:
(1) switch is divided into a plurality of VLAN groups, each VLAN organizes corresponding one or more switch input port, and each VLAN is distributed different VID;
(2) switch takes turns constant duration all VID bindings with output port VID and a certain input VLAN group, make that one or more sampled signals of bound VLAN group can be from this delivery outlet output, organizing in turn according to VLAN sampled signal thus, constant duration automatically switches to the output of switch output port.
A kind of time-division multiplexing alternating current sampling method for digital substation based on vlan technology; may further comprise the steps: the sampled signal of each interval combiner exports the input port of switch to; switch exports sampled signal to the protection measure and control device by its output port; it is characterized in that: also comprise by switch and realize the sample step of controlled switching of time-division multiplexing alternating current, be specially:
(1) switch is divided into a plurality of VLAN groups, each VLAN organizes corresponding one or more switch input port, and each VLAN is distributed different VID;
(2) switch receives the instruction of measure and control device, by instruction VID and a certain all VID bindings of importing the VLAN group with its output port;
(3) switch switches to the output of switch output port according to the VID of the VLAN group of output port binding with one or more sampled signals of this VLAN group.
And the sampled signal that described switch input port is received is the sampled value signal that meets IEC 61850-9-1 or IEC61850-9-2 standard.
Advantage of the present invention and beneficial effect are:
1. this time-division multiplexing alternating current sampling method for digital substation, the VLAN group that switch is divided into a plurality of corresponding input ports by vlan technology, and distribute different VID, realize the automatic switchover or the controlled switching of time-division multiplexing alternating current sampling by the inner time-division multiplexing alternating current sampling module of switch, output port VID and input port VID binding in turn in realizing at certain time intervals makes output port have only one group of vlan data output at the certain hour sheet.Thus, this method can receive the collection of the AC signal of a plurality of intervals or even whole transformer station by the measure and control device that disposes an Ethernet interface, has reduced the configuration of measure and control device, has simplified system design, has reduced equipment cost and system configuration cost.
2. this time-division multiplexing alternating current sampling method for digital substation, the communication flows of employed switch communication interface is only relevant with the sampling rate of analog signals, and is relevant with the fixed intervals number, has nothing to do with sum at interval; The traffic handling capability of measuring and controlling is relevant with the fixed intervals number with sum is irrelevant at interval.
Description of drawings
Fig. 1 by the method for sampling of the present invention the structural principle block scheme of use sampling system;
The process flow diagram that Fig. 2 automaticallyes switch for time-division multiplexing alternating current sampling of the present invention;
Fig. 3 is the sample process flow diagram of controlled switching of time-division multiplexing alternating current of the present invention.
Embodiment
The invention will be further described below by specific embodiment, and following examples are descriptive, is not determinate, can not limit protection scope of the present invention with this.
A kind of time-division multiplexing alternating current sampling method for digital substation based on vlan technology may further comprise the steps:
(1) sampled signal of each interval combiner exports the input port of switch to.The sampled signal that the switch input port is received is the sampled value signal that meets IEC 61850-9-1 or IEC61850-9-2 standard.
(2) by time-division multiplexing alternating current sampling handover module in the switch, the sampling of realization time-division multiplexing alternating current is automaticallyed switch, and referring to accompanying drawing 2, its flow process is:
A. switch is divided into a plurality of VLAN groups, each VLAN organizes the one or more input ports of corresponding switch, and each VLAN is distributed different VID.
As, switch is divided into five VLAN group: A1, A2, A3, A4, A5, and every group input sample signal distributed VID respectively, and form by three inputs as the A1 group, distribute VID.A11, A12, A13 respectively.The A2 group is made up of three inputs, distributes VID:A21, A22, A23 respectively.Owing to adopt VID to identify different input quantities, so the VID that each input quantity takies is unique, promptly the VID in each group is different, and the VID between group also is different.
B. switch takes turns constant duration all VID bindings with output port VID and a certain input VLAN group, make that one or more sampled signals of bound VLAN group can be from this delivery outlet output, organizing in turn according to VLAN sampled signal thus, constant duration automatically switches to the output of switch output port.
As, under time t=40ms uniformly-spaced, respectively A1, A2, A3, A4, A5 group are tied in the delivery outlet in order, make at this moment between sheet have only one group of input to export from output port, just the VID of delivery outlet is bound with all VID of some group in the implementation procedure.For example in the t1 timeslice, with the VID of delivery outlet and all VID bindings of A1 group, the VID and A11, A12, the A13 that are about to delivery outlet bind, to have only VID be that the incoming message data of A11, A12, A13 can be exported from delivery outlet to sheet between making at this moment, and promptly the signal of A1 group can be exported from delivery outlet.Adopt in the same way the t2 timeslice just the VID of delivery outlet bind the VID of A2 group.The t3 timeslice just the VID of delivery outlet bind the VID of A3 group.The t4 timeslice just the VID of delivery outlet bind the VID of A4 group.The t5 timeslice just the VID of delivery outlet bind the VID of A5 group.So repeatedly, just the data of each group are outputed to delivery outlet.
(3) switch takes turns constant duration by its output port with sampled signal and exports measure and control device to.The sampled signal of switch output port is the sampled value signal that meets IEC 61850-9-1 or IEC61850-9-2 standard.
A kind of digitizing time-division multiplexing alternating current sampling method based on vlan technology may further comprise the steps:
(1) sampled signal of each interval combiner exports the input port of switch to.The input signal that the switch input port is received is the sampled value signal that meets IEC 61850-9-1 or IEC61850-9-2 standard.
(2) by time-division multiplexing alternating current sampling handover module in the switch, realize the time-division multiplexing alternating current controlled switching of sampling, referring to accompanying drawing 3, its flow process is:
A. switch is divided into a plurality of VLAN groups, each VLAN organizes corresponding switch one input port, and each VLAN is distributed different VID.
As, corresponding five input ports of switch are divided into five VLAN groups, each VLAN organizes corresponding input port and distributes different VID:A1, A2, A3, A4, A5.And every group input sample signal distributed VID respectively, and form by three inputs as the A1 group, distribute VID:A11, A12, A13 respectively.The A2 group is made up of three inputs, distributes VID:A21, A22, A23 respectively.Owing to adopt VID to identify different input quantities, so the VID that each input quantity takies is unique, promptly the VID in each group is different, and the VID between group also is different.
B. switch receives the instruction of measure and control device, by instruction VID and a certain all VID bindings of importing the VLAN group with its output port;
C. switch exports one or more sampled signals switchings that this VLAN organizes the output of to switch output port according to the VID of the VLAN group of output port binding.
Be implemented in the VID binding that the certain hour sheet has only the VID and the output port of one group of input port thus, promptly one group of sampled signal can be exported from output port.
(3) switch exports sampled signal to measure and control device by the instruction of measure and control device in turn by its output port.The output signal of switch output port is the sampled value signal that meets IEC 61850-9-1 or IEC61850-9-2 standard.
Claims (3)
1. time-division multiplexing alternating current sampling method for digital substation based on vlan technology; may further comprise the steps: the sampled signal of each interval combiner transfers to the input port of switch; switch exports sampled signal to the protection measure and control device by its output port; it is characterized in that: also comprise by switch and realize the step that the time-division multiplexing alternating current sampling is automaticallyed switch, be specially:
(1) switch is divided into a plurality of VLAN groups, each VLAN organizes corresponding one or more switch input port, and each VLAN is distributed different VID;
(2) switch takes turns constant duration all VID bindings with output port VID and a certain input VLAN group, make that one or more sampled signals of bound VLAN group can be from this output port output, organizing in turn according to VLAN sampled signal thus, constant duration automatically switches to the output of switch output port.
2. time-division multiplexing alternating current sampling method for digital substation based on vlan technology; may further comprise the steps: the sampled signal of each interval combiner exports the input port of switch to; switch exports sampled signal to the protection measure and control device by its output port; it is characterized in that: also comprise by switch and realize the sample step of controlled switching of time-division multiplexing alternating current, be specially:
(1) switch is divided into a plurality of VLAN groups, each VLAN organizes corresponding one or more switch input port, and each VLAN is distributed different VID;
(2) switch receives the instruction of measure and control device, by instruction VID and a certain all VID bindings of importing the VLAN group with its output port;
(3) switch switches to the output of switch output port according to the VID of the VLAN group of output port binding with one or more sampled signals of this VLAN group.
3. the time-division multiplexing alternating current sampling method for digital substation based on vlan technology according to claim 1 and 2 is characterized in that: the sampled signal that described switch input port is received is the sampled value signal that meets IEC 61850-9-1 or IEC61850-9-2 standard.
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Inventor after: Xu Ke Inventor after: Yang Gang Inventor after: Gu Jian Inventor after: Fu Meng Inventor after: Zhang Xin Inventor after: Kang Ning Inventor before: Fang Qiong Inventor before: Fu Yanhua Inventor before: Xu Ke Inventor before: Gu Jian Inventor before: Ji Haifeng Inventor before: Kang Ning |
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Correction item: Name; CO inventor Correct: Xu Ke|Yang Gang| Gu Jian| Fu Meng|Zhang pan|Kang Ning False: Xu Ke|Yang Gang| Gu Jian| Fu Meng| Zhang Xin|Kang Ning Number: 15 Volume: 26 |
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Owner name: JIANGSU WISCOM TECHNOLOGY CO., LTD. STATE GRID COR Free format text: FORMER OWNER: JIANGSU WISCOM TECHNOLOGY CO., LTD. Effective date: 20121127 |
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Effective date of registration: 20121127 Address after: 300010 Tianjin city Hebei District Wujing Road No. 39 Patentee after: Tianjin Electric Power Corp. Patentee after: Jinzhi Science and Technology Co., Ltd., Jiangsu Patentee after: State Grid Corporation of China Address before: 300010 Tianjin city Hebei District Wujing Road No. 39 Patentee before: Tianjin Electric Power Corp. Patentee before: Jinzhi Science and Technology Co., Ltd., Jiangsu |