CN116131996A - Intelligent substation Ethernet communication message monitoring equipment and monitoring method - Google Patents

Abstract

The invention discloses an intelligent substation Ethernet communication message monitoring device and a monitoring method, comprising the following steps: a pair of communication ports for serially accessing the monitored communication loop; the core processing module is used for forwarding and copying the Ethernet message transmitted from the communication port; the Ethernet monitoring port is used for monitoring and outputting the Ethernet message forwarded and copied by the core processing module; and the power port is used for supplying power to the communication port, the Ethernet monitoring port and the core processing module. The advantages are that: the intelligent substation process layer and station control layer Ethernet communication message monitoring device has the characteristics of simple structure, convenience in carrying, rapidness in use, complete and accurate monitoring message, low time delay, safe and reliable monitoring mode and the like, and improves the debugging, overhauling and operation and maintenance efficiency.

Description

Intelligent substation Ethernet communication message monitoring equipment and monitoring method

Technical Field

The invention relates to intelligent substation Ethernet communication message monitoring equipment and a monitoring method, and belongs to the technical field of power system automation.

Background

The intelligent transformer station adopts advanced, reliable, integrated and environment-friendly intelligent equipment, takes total station information digitization, communication platform networking and information sharing standardization as basic requirements, automatically completes basic functions such as information acquisition, measurement, control, protection, metering and detection, and simultaneously has the advanced functions of supporting real-time automatic control, intelligent regulation, online analysis decision, collaborative interaction and the like of a power grid. The typical feature of the intelligent substation is that a digital communication network is used to replace cables to transmit state quantity, voltage and current secondary signals. The communication network is safe and reliable, and has important significance for the stable operation of the intelligent substation.

At present, when a communication network of an intelligent substation has problems and a message needs to be collected, three means are generally adopted. Firstly, a network message record analysis device deployed in a station is used for collecting and checking messages; secondly, collecting and checking the message by running packet capturing software on the hosts of both communication parties; thirdly, checking the message collected by accessing the concentrator with transparent transmission function. All three methods have certain disadvantages. The first method needs to configure a switch, configure a mirror image port, collect huge data volume, and cannot collect messages in a direct communication mode; the second method collects the message which is the host network card buffer message and may be different from the actual physical link message; in the third method, a hub is added in the communication network, so that the network topology is changed, and potential safety hazards exist. Therefore, a new solution is needed to solve the above-mentioned problems.

Disclosure of Invention

The invention aims to overcome the defects of the prior art and provides intelligent substation Ethernet communication message monitoring equipment and a monitoring method.

In order to solve the technical problems, the invention provides an intelligent substation ethernet communication message monitoring device, which comprises:

a pair of communication ports for serially accessing the monitored communication loop;

the core processing module is used for forwarding and copying the Ethernet message transmitted from the communication port;

the Ethernet monitoring port is used for monitoring and outputting the Ethernet message forwarded and copied by the core processing module;

and the power port is used for supplying power to the communication port, the Ethernet monitoring port and the core processing module.

Further, the core processing module includes: a communication PHY chip, a monitoring PHY chip and an FPGA chip;

the front end of the communication PHY chip is connected with a physical layer transceiver of the communication port, the rear end of the communication PHY chip is connected with the FPGA chip, and the transmission configuration of the PHY chip, the FPGA chip and the communication port is bidirectional transmission and is used for receiving and transmitting Ethernet data streams of the physical layer;

the front end of the monitoring PHY chip is connected with a physical layer transceiver of the Ethernet monitoring port, the rear end of the monitoring PHY chip is connected with the FPGA chip, and the Ethernet data copied by the FPGA chip is unidirectionally transmitted to the monitoring PHY chip for monitoring the Ethernet data flow of the physical layer.

Further, the communication PHY chip is configured to send and receive an ethernet optical communication signal or an ethernet electrical communication signal.

Furthermore, an external port of the Ethernet monitoring port adopts an RJ45 interface and is used for being connected with external packet capturing equipment.

Furthermore, the external connection mode of the power port adopts a USB Tpye-C mode.

A monitoring method of intelligent substation Ethernet communication message monitoring equipment comprises the following steps:

reading pin data sent to the PHY chip by a communication port I in the pair of communication ports;

analyzing the current frame preamble according to the pin data;

analyzing a current frame initiator according to the pin data;

acquiring current frame data, frame length and frame check code according to the pin data;

generating a current frame transmission byte stream according to the current frame preamble, the current frame initiator, the current frame data, the frame length and the frame check code;

transmitting the current frame byte stream to a PHY chip receiving pin of a second communication port of the pair of communication ports;

the current frame byte stream is copied to a receiving pin of a monitoring PHY chip and transmitted to an Ethernet monitoring port through the PHY chip.

The invention has the beneficial effects that:

the device and the method can monitor the Ethernet communication messages of the process layer and the station control layer of the intelligent substation under the condition of not damaging the original communication topology, and have the characteristics of simple structure, convenient carrying, quick use, complete and accurate monitoring messages, low time delay, safe and reliable monitoring mode and the like, and the debugging, overhaul and operation and maintenance efficiency is improved.

Drawings

Fig. 1 is an appearance schematic diagram of an intelligent substation ethernet communication message monitoring device and a monitoring method according to the present invention;

fig. 2 is a general design block diagram of an intelligent substation ethernet communication message monitoring device and a monitoring method according to the present invention;

fig. 3 is a schematic diagram of an actual application scenario of an intelligent substation ethernet communication packet monitoring device and a monitoring method according to the present invention.

Detailed Description

The invention is further described below with reference to the accompanying drawings. The following examples are only for more clearly illustrating the technical aspects of the present invention, and are not intended to limit the scope of the present invention.

Referring to fig. 1 and 2, an intelligent substation ethernet communication packet monitoring device includes:

the pair of communication ports are connected in series to the monitored communication loop, so that the normal operation of the original communication link is ensured; the communication port is internally connected with the communication PHY chip of the core processing module. The communication port is designed as an SFP mode, and can be inserted into an Ethernet optical communication module or an Ethernet electric communication module according to a monitoring object to realize monitoring of a process layer communication loop and a station control layer communication loop of the intelligent substation.

An Ethernet monitoring port, which is connected with packet capturing equipment such as a network analyzer or a notebook computer; and monitoring the PHY chip connection with the core processing module internally. The Ethernet monitoring port is designed to be in an RJ45 mode, so that the Ethernet monitoring port is convenient to connect with equipment such as a network analyzer or a notebook computer.

And the power port is designed into a USB Tpye-C mode, can be powered by a notebook computer or a mobile phone charger, and is convenient for field environment use.

And the core processing module is used for forwarding and copying the Ethernet message. The core processing module comprises two communication PHY chips, a monitoring PHY chip, an FPGA chip and a peripheral auxiliary circuit. The front end of the communication PHY chip is connected with the communication port physical layer transceiver, and the rear end of the communication PHY chip is connected with the FPGA and is configured to be transmitted in a bidirectional mode, so that the receiving and transmitting of the Ethernet physical layer data stream are realized. The communication PHY chip selects to support the optoelectronic signal chip at the same time. The front end of the monitoring PHY chip is connected with the monitoring port physical layer transceiver, and the rear end of the monitoring PHY chip is connected with the FPGA and is configured to be unidirectionally transmitted, so that monitoring of the Ethernet physical layer data stream is realized. The FPGA realizes the functions of identifying, processing, receiving and transmitting, copying and the like of the Ethernet physical layer data flow through a hardware description language program, and the specific monitoring method comprises the following steps:

1. reading the data of a transmitting pin of a PHY chip of a first communication port;

2. analyzing the current frame preamble;

3. analyzing the current frame initiator and identifying the frame initial position;

4. acquiring current frame data, frame length and frame check code;

5. generating a current frame transmission byte stream comprising a preamble, a starter, frame data and a check code;

6. transmitting the current frame byte stream to a PHY chip receiving pin of a second communication port;

7. copying the current frame byte stream to a PHY chip receiving pin of a monitoring port;

8. the processing mode of the second communication port is the same as that of the first communication port.

FIG. 3 is a view of an application of the present invention, wherein the monitoring device of the present invention is respectively connected to a protection device, a switch, and a computer or a portable network analyzer, and the switch is also connected to a monitoring background; under the scene, the invention can monitor the Ethernet communication message of the intelligent substation under the condition of not damaging the original communication topology, can monitor the station control layer electric port communication message and the process layer optical port communication message, and only performs physical layer processing on the monitored message, thereby maximally maintaining the authenticity of the monitored message.

The foregoing is merely a preferred embodiment of the present invention, and it should be noted that modifications and variations could be made by those skilled in the art without departing from the technical principles of the present invention, and such modifications and variations should also be regarded as being within the scope of the invention.

Claims (6)

1. An intelligent substation ethernet communication message monitoring device, which is characterized by comprising:

a pair of communication ports for serially accessing the monitored communication loop;

the core processing module is used for forwarding and copying the Ethernet message transmitted from the communication port;

the Ethernet monitoring port is used for monitoring and outputting the Ethernet message forwarded and copied by the core processing module;

and the power port is used for supplying power to the communication port, the Ethernet monitoring port and the core processing module.

2. The intelligent substation ethernet communication message listening device according to claim 1, wherein the core processing module comprises: a communication PHY chip, a monitoring PHY chip and an FPGA chip;

the front end of the communication PHY chip is connected with a physical layer transceiver of the communication port, the rear end of the communication PHY chip is connected with the FPGA chip, and the transmission configuration of the PHY chip, the FPGA chip and the communication port is bidirectional transmission and is used for receiving and transmitting Ethernet data streams of the physical layer;

the front end of the monitoring PHY chip is connected with a physical layer transceiver of the Ethernet monitoring port, the rear end of the monitoring PHY chip is connected with the FPGA chip, and the Ethernet data copied by the FPGA chip is unidirectionally transmitted to the monitoring PHY chip for monitoring the Ethernet data flow of the physical layer.

3. The intelligent substation ethernet communication message monitoring device according to claim 2, wherein the communication PHY chip is configured to send and receive an ethernet optical communication signal or an ethernet electrical communication signal.

4. The intelligent substation ethernet communication message monitoring device according to claim 1, wherein an RJ45 interface is adopted for an external port of the ethernet monitoring port, and the external port is used for being connected with an external packet capturing device.

5. The intelligent substation ethernet communication message monitoring device according to claim 1, wherein the external connection mode of the power port adopts a USB Tpye-C mode.

6. A monitoring method based on the intelligent substation ethernet communication message monitoring device according to claim 2, comprising the following steps:

reading pin data sent to the PHY chip by a communication port I in the pair of communication ports;

analyzing the current frame preamble according to the pin data;

analyzing a current frame initiator according to the pin data;

acquiring current frame data, frame length and frame check code according to the pin data;

generating a current frame transmission byte stream according to the current frame preamble, the current frame initiator, the current frame data, the frame length and the frame check code;

transmitting the current frame byte stream to a PHY chip receiving pin of a second communication port of the pair of communication ports;

the current frame byte stream is copied to a receiving pin of a monitoring PHY chip and transmitted to an Ethernet monitoring port through the PHY chip.

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