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Elastic reliable router for power grid wide-area phase measurement system

A phase measurement and router technology, applied to the phase angle between voltage and current, transmission system, measurement device, etc., can solve data packet loss, increase end-to-end data transmission delay, affect SCADA state estimation and protection action And other issues

Active Publication Date: 2021-03-12
ZHEJIANG LAB
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, due to link failures, network congestion, etc., data packet loss is unavoidable, and fast retransmission recovery of data packets is the key to ensuring that data packets are delivered on schedule
The existing technology uses TCP (Transmission Control Protocol) retransmission control, but its retransmission success rate is affected by the loss of receipt data packets (Acknowledgment, ACK) and retransmission data packets; it estimates the time of lost data packets and TCP transmission Both the transmission time of the end and the receiving end will seriously increase the end-to-end data transmission delay, affect the state estimation and protection action of SCADA, and then destroy the safe and stable operation of the power grid

Method used

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  • Elastic reliable router for power grid wide-area phase measurement system
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  • Elastic reliable router for power grid wide-area phase measurement system

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Embodiment

[0080] image 3 A schematic diagram of the deployment and communication process of the elastic and reliable router in the existing PMU and PDC equipment communication network is given. The end-to-end communication between the PMU and its PDC is realized through 11 elastic and reliable routers involved in the present invention. The RR between the communication pair formed by the PMU and the PDC is established as follows: First, the PP path is , and the second is for one of the routers , Three RSP paths have been established with the three upstream routers of the PP respectively: ① ;② ;③ . in, and The link between , and share, and as well as and The 2 links between are and shared. The forwarding items of the FST generated by the multipath forwarding state table module are shown in Table 1. The above FST forwarding items are shown in Table 2, Table 3 shows the FST forwarding items on , and the rest of the routers are generated similarly to t...

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Abstract

The invention discloses an elastic reliable router for a power grid wide-area phase measurement system. The elastic reliable router comprises a Data packet processing module, a RetransReq data packetprocessing module, a RetransReport data packet processing module, a basic data packet processing module, a multi-path forwarding state table module, a content storage queue module and a physical port.According to the elastic reliable router, active lost data packet detection and a single or batch retransmission mechanism are realized, so that a lost data packet can be directly recovered in a network from an upstream router through which the lost data packet passes, the recovery time success rate and high efficiency of the lost data packet are improved, and safe and stable operation of the power grid wide-area phase measurement communication system is ensured.

Description

technical field [0001] The invention belongs to the technical field of reliable communication for a wide-area phase measurement system of a power grid, and in particular relates to an elastic and reliable router for a wide-area phase measurement system of a power grid. Background technique [0002] In the modern power grid, a large number of phase measurement units (PhasorMeasurement Unit, PMU) are deployed in substations, distribution networks, etc. to monitor the grid lines and transformers. The data collected by the PMU is usually transmitted to the Phase data concentrator (Phasor Data Concentrator, PDC), the acquisition frequency can reach 10-60 times per second, and the end-to-end data transmission delay requirement can reach between 35-50ms. The data sampled by the PDC is crucial to the correct state estimation of the grid supervisory control and data acquisition system (SCADA). [0003] However, due to link failures, network congestion, etc., the problem of data pack...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L12/26H04L12/703H04L12/707H04L29/08G01R25/00H04L45/24H04L45/28
CPCH04L43/0829H04L45/22H04L45/28H04L67/12G01R25/00
Inventor 周伯阳
Owner ZHEJIANG LAB
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