CN103701716B - A kind of SV is directly adopted and the common port transmitting method of GOOSE message - Google Patents

Abstract

Directly adopted the present invention relates to a kind of SV and be total to port transmitting method with GOOSE message, belong to intelligent substation of electric power system technical field of relay protection.The present invention directly adopts the transmission characteristic with GOOSE message according to SV, on the basis of SV delivery time accuracys are ensured, transmission channel is time-multiplexed, the transmitting-receiving of GOOSE message is carried out between two frame SV messages, and according to the GOOSE inserted between the frame SV messages of concrete engineering configuration file dynamic calculation two frame number, the transmission bandwidth of maximized utilization passage, shorten the transmission delay of GOOSE signals, using ethernet controller message receiver system, by FPGA it is chaotic to resampling markers caused by the SV and GOOSE message of ethernet controller None- identified the problem of.And GOOSE transmission delays of the present invention are small, be not related to that hardware modifications, software processing are simple, reliability is high, be easily achieved, can be widely popularized.

Description

A common port transmission method for SV direct acquisition and GOOSE message

technical field

The invention relates to a common-port transmission method for SV direct mining and GOOSE messages, and belongs to the technical field of relay protection for intelligent substations in electric power systems.

Background technique

In the new generation of smart substations with the technical characteristics of "reasonable structural layout, highly integrated system, advanced technical equipment, economy, energy saving and environmental protection, and integrated support and regulation", in order to meet the requirements of high The requirements for construction, operation and maintenance of maintenance, comprehensive support for the integration of regulation and control, and the transformation of the development mode of the power grid, proposed the integration of intelligent terminals and merging unit devices at the process level of the system with a voltage level of 110kV and below, SV direct procurement reports and GOOSE reports at this interval Shared network port for file transmission.

In systems with a voltage level of 110kV and below, it is necessary to increase the transmission of GOOSE messages on the original SV direct mining link. Since SV direct mining has high requirements on the message sending time of the process layer equipment and the message receiving time of the interval layer equipment, the GOOSE message transmission in the SV direct mining link will affect the interval layer equipment and the process layer. Each device presents new technical challenges. Especially without changing the hardware, it is of great significance for the construction of a new generation of smart substations to study the common port transmission scheme of SV direct mining and GOOSE messages to realize the sharing of network port resources.

Contents of the invention

The purpose of the present invention is to provide a common port transmission method for SV direct sampling and GOOSE message, so as to solve the problem that the current universal Ethernet controller cannot recognize the SV and GOOSE message and cause the confusion of time scale when resampling.

The present invention provides a kind of SV direct acquisition and GOOSE message common port transmission method for solving the above-mentioned technical problem, and this common port transmission method comprises the following steps:

1) Set the priority of the SV message higher than the GOOSE message;

2) Perform time division multiplexing on the transmission channel, and send and receive GOOSE messages between two frames of SV messages.

The number of GOOSE message frames sent between two frames of SV messages and the maximum length of each frame of GOOSE message are calculated according to the configuration file.

When the process layer device processes SV direct acquisition and GOOSE messages, sending SV direct acquisition messages is the highest priority, followed by sending GOOSE messages, and finally receiving GOOSE messages.

The process layer device uses FPGA to control the Ethernet controller, so as to meet the requirement of accurate sending time of the SV direct sampling message.

When the interval layer processes SV direct acquisition and GOOSE messages, it prioritizes the reception of SV direct acquisition messages, then the reception of GOOSE messages, and finally the transmission of GOOSE messages.

The interval layer completes receiving messages, marking time stamps, clearing receiving flags of interrupt status registers and sending messages through FPGA.

The beneficial effects of the present invention are: according to the transmission characteristics of SV direct acquisition and GOOSE message, the present invention, on the basis of ensuring the accuracy of SV sending time, time-division multiplexes the transmission channel, and performs GOOSE between two frames of SV messages. Send and receive messages, and dynamically calculate the number of GOOSE frames inserted between two frames of SV messages according to the specific project configuration file, maximize the use of the transmission bandwidth of the channel, shorten the transmission delay of GOOSE signals, and use the Ethernet controller to report The message receiving mechanism, the resampling time stamp confusion problem caused by the SV and GOOSE messages that the Ethernet controller cannot recognize through the FPGA. Moreover, the GOOSE transmission delay of the present invention is small, does not involve hardware modification, simple software processing, high reliability, easy implementation, and can be widely popularized.

Description of drawings

Fig. 1 is a hardware structural diagram of SV direct mining and GOOSE common port transmission in the intelligent substation of the present invention;

FIG. 2 is a sequence diagram of process layer device processing in an embodiment of the present invention;

Fig. 3 is a sequence diagram of the processing of the interlayer device in the embodiment of the present invention.

detailed description

The specific embodiments of the present invention will be further described below in conjunction with the accompanying drawings.

The SV direct sampling and GOOSE common port transmission method of the present invention is proposed on the basis of analyzing the SV direct sampling scheme and the GOOSE transmission mechanism. The accuracy of the receiving time stamp, and the special communication service mapping of the GOOSE message determines a special retransmission scheme. Under normal circumstances, the GOOSE message is retransmitted every 5s, and the data flow generated is very small. However, when a fault occurs, It is possible that multiple switching signals are shifted, resulting in a large data flow. The communication model and message frame format of the SV direct sampling and GOOSE messages are exactly the same, and the insulation length may be calculated according to the project configuration, but the SV direct sampling messages only transmit analog quantities, and the format is fixed, while GOOSE transmits various types and can carry The quality, time stamp, and packet length vary greatly. According to the transmission characteristics of SV direct sampling and GOOSE messages, the present invention, on the basis of ensuring the accuracy of SV sending time, time-division multiplexes the transmission channel, and transmits and receives GOOSE messages between two frames of SV messages, and according to The specific project configuration file dynamically calculates the number of GOOSE frames inserted between two frames of SV messages, maximizes the use of the transmission bandwidth of the channel, shortens the transmission delay of GOOSE signals, and utilizes the message receiving mechanism of the Ethernet controller to communicate with the FPGA through the FPGA. The resampling timing confusion problem caused by the SV and GOOSE packets that the Ethernet controller cannot recognize.

A SV direct sampling and GOOSE common port transmission method of the present invention is used between the merging unit intelligent terminal integration device and the interval layer protection measurement and control integration device, wherein the process layer equipment uses a CPU plug-in to complete the merging unit and the intelligent terminal Function, the bay layer device uses a CPU plug-in for SV and GOOSE sending and receiving, the process layer device CPU plug-in and the bay layer interface CPU plug-in use the same hardware design, as shown in Figure 1. The following is an example of a new generation of intelligent substation system with a voltage level of 110kV and below. In this embodiment, the process layer intelligent terminal and the merging unit device and the interval layer protection measurement and control device adopt an integrated design, and the process layer and the interval layer transmit SV direct sampling and GOOSE messages simultaneously through an Ethernet port. The specific transmission process is as follows :

To process SV sending and GOOSE transmission at the process layer, the key to SV direct sampling processing of the merging unit is the accuracy of the sending time and the rated delay value in the sampled message, so the GOOSE transmission time must be reasonably arranged on the basis of ensuring SV transmission , using FPGA to control the Ethernet controller to meet the requirement of precise sending time, the process layer device takes sending SV message as the highest priority, followed by sending GOOSE message, and finally receiving GOOSE message, during the device power-on initialization process Calculate the number of GOOSE message frames to be sent and the maximum length of each frame of GOOSE message according to the configuration file, and then determine the number of GOOSE message frames inserted between the two frames of SV messages. When the timer set by the FPGA expires, the FPGA sending task is executed immediately and the interrupt task of the CPU is triggered, and the FPGA receiving task is always executed, as shown in Figure 2.

To process the SV reception and GOOSE transmission at the interval layer, since the SV adopts the direct collection mode, the receiving time is very accurate, so the reception of the SV direct collection message should be processed first, then the GOOSE message reception, and finally the GOOSE message transmission. FPGA completes receiving messages, stamping time stamps, clearing interrupt status register receiving flags, and sending messages. The CPU regularly queries the message receiving buffer of the FPGA, reads it out if there is data, and then executes message parsing, resampling, and downloading. Send GOOSE message. At the end of each task, the CPU submits all the GOOSE packets that need to be sent to the FPGA, and the FPGA detects the sending of the Ethernet controller, and the Ethernet controller immediately sends the GOOSE packets when it is idle, as shown in Figure 3.

Claims (5)

1. a kind of SV is directly adopted and the common port transmitting method of GOOSE message, it is characterised in that the common port transmitting method includes following step Suddenly：

1) priority of setting SV messages is higher than GOOSE message；

2) transmission channel is time-multiplexed, process layer devices carry out the receipts of GOOSE message between two frame SV messages are sent Hair；

3) wall priority treatment SV when processing SV is directly adopted with GOOSE message directly adopts message and received, followed by GOOSE message connects Receipts are finally that GOOSE message is sent.

2. SV according to claim 1 is directly adopted and the common port transmitting method of GOOSE message, it is characterised in that described in two frames The maximum length of transmitted GOOSE message frame number and every frame GOOSE message is calculated according to configuration file between SV messages Arrive.

3. SV according to claim 1 is directly adopted and the common port transmitting method of GOOSE message, it is characterised in that the process layer Equipment directly adopts message as limit priority when processing SV is directly adopted with GOOSE message to send SV, secondly sends GOOSE message, It is finally to receive GOOSE message.

4. SV according to claim 3 is directly adopted and the common port transmitting method of GOOSE message, it is characterised in that described process Layer equipment controls ethernet controller using FPGA, and directly adopting message delivery time to meet SV accurately requires.

5. SV according to claim 1 is directly adopted and the common port transmitting method of GOOSE message, it is characterised in that described interval Layer completes to receive message, beat markers, clear interrupt status register reception mark and send message by FPGA.