A Resilient and Reliable Router for Power Grid Wide-Area Phase Measurement Systems

A phase measurement and router technology, applied to the phase angle between voltage and current, transmission system, measurement device, etc., can solve the problem of affecting SCADA state estimation and protection actions, increasing end-to-end data transmission delay, and destroying power grid security Stable operation and other issues, to achieve the effect of improving communication reliability, improving efficiency, and solving fast retransmission recovery

Active Publication Date: 2021-06-01
ZHEJIANG LAB
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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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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  • A Resilient and Reliable Router for Power Grid Wide-Area Phase Measurement Systems
  • A Resilient and Reliable Router for Power Grid Wide-Area Phase Measurement Systems
  • A Resilient and Reliable Router for Power Grid Wide-Area Phase Measurement Systems

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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, with The link between , with share, with as well as with The 2 links between are with 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...

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Abstract

The invention discloses an elastic and reliable router for a wide-area phase measurement system of a power grid. The elastic and reliable router includes a Data packet processing module, a RetransReq data packet processing module, a RetransReport data packet processing module, a basic data packet processing module, and a multipath forwarding module. State Table Module, Content Storage Queue Module, and Physical Ports. The flexible and reliable router of the present invention realizes active lost data packet detection, and a single or batch retransmission mechanism, so that the lost data packet can be directly recovered from the upstream router of its path in the network, and the success rate and recovery time of the lost data packet are improved. Efficiency ensures the safe and stable operation of the grid wide-area phase measurement communication system.

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 Patents(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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