CN-121984632-A - Beidou time service state and short message-based power grid collaborative monitoring method and system

CN121984632ACN 121984632 ACN121984632 ACN 121984632ACN-121984632-A

Abstract

The invention relates to a power grid collaborative monitoring method and system based on Beidou time service state and short messages. The method comprises the steps of generating a first-stage time-frequency reference by fusing Beidou common view and atomic clock data, transmitting the first-stage time-frequency reference to each node through an electric optical fiber network, utilizing satellite observation and link delay data of each node, combining known hardware delay, solving absolute time deviation through common view comparison, predicting variation trend of the absolute time deviation through Kalman filtering to form predictive space-time state information, receiving and analyzing Beidou short messages through a special line to obtain terminal identity, position and service load, mapping the terminal position to electric facilities in a power grid GIS, binding the predictive space-time state information corresponding to the facilities as labels and service data to generate fusion data packets, and intelligently distributing the data packets to corresponding power grid service systems according to early warning states of the labels. The invention realizes the deep fusion of the space-time reference and the emergency communication data, and improves the collaborative monitoring and fault handling capacity of the power grid in the area without public network.

Inventors

ZHAO QIANG
GAO SHANG
Liang Dalei
LAI JUNHAO
LIU LIANG
ZHANG DAIXUN

Assignees

国网思极位置服务有限公司

Dates

Publication Date: 20260505
Application Date: 20260130

Claims (10)

1. The power grid collaborative monitoring method based on the Beidou time service state and the short message is characterized by comprising the following steps of: Receiving a communication data packet sent by an electric power terminal through a Beidou short message, wherein the communication data packet comprises identity information and geographic position information of the electric power terminal; Based on a Beidou time service network of the power system, acquiring predictive time-space state information of a power grid node associated with the geographic position information, wherein the predictive time-space state information comprises a predicted time synchronization deviation evolution trend of the power grid node; Mapping the geographic position information of the power terminal to a power grid GIS topological model, obtaining a corresponding power facility identifier, binding the predictive space-time state information corresponding to the power grid node where the power facility identifier is located with the communication data packet as a tag, and generating a fusion data packet; And distributing the fusion data packet to a corresponding power grid service application system according to the state type indicated by the predictive space-time state information.
2. The power grid collaborative monitoring method based on the Beidou time service state and the short message according to claim 1 is characterized in that power grid nodes of the Beidou time service network of the power system comprise headquarter nodes and at least one provincial node, the headquarter nodes are used for generating first-stage time-frequency reference signals by receiving Beidou satellite common-view data and combining local atomic clock groups, and the first-stage time-frequency reference signals are used as time tracing references and are transmitted from the headquarter nodes to time-frequency synchronization equipment of each provincial node step by step through a power optical fiber frequency synchronization network.
3. The method for collaborative monitoring of a power grid based on Beidou time service state and short messages according to claim 2, wherein the obtaining of the predictive time-space state information of the power grid nodes associated with the geographic position information is specifically as follows: The method comprises the steps of collecting time service correction data of all levels of grid nodes associated with geographical position information, wherein the time service correction data comprise satellite original observation data from time-frequency synchronous equipment and bidirectional time delay measurement data of a ground optical fiber link, calculating absolute time deviation of each grid node clock relative to a first-level time-frequency reference signal by utilizing a common-view comparison algorithm based on the time service correction data and combining with a known receiver hardware delay calibration value, and inputting the absolute time deviation sequence into a predictive filtering model to obtain predictive time-space state information.
4. The method for collaborative monitoring of a power grid based on Beidou time service state and short messages according to claim 3, wherein calculating absolute time deviation of each power grid node clock relative to the first-stage time-frequency reference signal by using a common-view comparison algorithm is specifically as follows: The method comprises the steps of respectively extracting satellite original observation data of the same group of Beidou satellites at the same moment from time service correction data collected by a headquarter node and a provincial node to be calculated, wherein the satellite original observation data comprises a pseudo-range observation value and a carrier phase observation value, carrying out hardware delay correction on the satellite original observation data by combining a known receiver hardware delay calibration value, eliminating satellite clock differences through inter-station difference by utilizing the satellite original observation data after hardware delay correction, correcting ionosphere and troposphere delay by adopting a dual-frequency model and a troposphere delay correction model, and calculating and obtaining absolute time deviation of a provincial node clock relative to the headquarter node clock based on the observation value after ionosphere and troposphere delay correction, the known receiver coordinates and satellite orbit and the bidirectional delay measurement data.
5. The method for collaborative monitoring of a power grid based on Beidou time service state and short messages according to claim 3, wherein the predictive filtering model is a Kalman filtering model, and the step of obtaining predictive time-space state information is specifically as follows: Establishing a clock state space model taking absolute time deviation and change rate thereof as state quantity; And taking the absolute time deviation as an observed quantity, inputting the observed quantity into the clock state space model, carrying out operation through a Kalman filtering recursive algorithm to obtain a predicted value of the node clock difference in a specific time period in the future, and generating an early warning sign and outputting the early warning sign and the predictive space-time state information together when the predicted value exceeds a preset stability threshold.
6. The method for collaborative monitoring of a power grid based on Beidou time service state and short messages according to claim 1, wherein the communication data packet sent by the receiving power terminal through the Beidou short messages is specifically: And obtaining an original data frame from the Beidou short message service platform through a special link, unpacking and checking the original data frame according to a preset communication protocol, and decrypting the encrypted communication service load and the geographic position information in the data frame by using a key matched with the terminal identity information.
7. The method for collaborative monitoring of a power grid based on Beidou time service state and short messages according to claim 1 or 6, wherein the distributing according to the type of the space-time state label comprises the following steps: If the time-space state label indicates that the time-frequency state of the associated electric power facility is early warning or abnormal, pushing the fusion data packet to a power grid production control system, and if the state is normal, distributing the fusion data packet to a corresponding equipment operation and maintenance management system or an emergency communication management system according to a service type identifier implied or stated in the communication service load.
8. Power grid collaborative monitoring system based on Beidou time service state and short message, and is characterized in that the system comprises: The power data receiving module is used for receiving a communication data packet sent by the power terminal through the Beidou short message, wherein the communication data packet comprises identity information and geographic position information of the power terminal; The space-time information prediction module is used for acquiring predictive space-time state information of a power grid node associated with the geographic position information based on a Beidou time service network of the power system, wherein the predictive space-time state information comprises a predicted time synchronization deviation evolution trend of the power grid node; the data fusion and label binding module is used for receiving an original data packet from the Beidou III short message service platform through a special link by a headquarter node, decoding, decrypting and checking the original data packet, and extracting a unique identity mark, an encrypted geographic position coordinate and a communication service load of the terminal; And the intelligent distribution processing module is used for distributing the fusion data packet to a corresponding power grid service application system according to the state type indicated by the predictive space-time state information.
9. An electronic device comprising a memory, a processor and a computer program stored on the memory and executable on the processor, wherein the processor implements the method of any one of claims 1 to 7 when the program is executed by the processor.
10. A computer readable storage medium, on which a computer program is stored, characterized in that the program, when being executed by a processor, implements the method according to any one of claims 1 to 7.

Description

Beidou time service state and short message-based power grid collaborative monitoring method and system Technical Field The invention relates to a power grid collaborative monitoring method and system based on Beidou time service state and short messages, and belongs to the technical field of power system communication and time synchronization. Background With the development of the power grid to the wide area distribution type and the intelligent direction, higher requirements are put forward on the state monitoring and the risk early warning of the power facilities in the remote areas. The Beidou satellite navigation system is a key infrastructure for supporting the construction of the electric Internet of things without the public network coverage area by virtue of the time service and short message communication capability. The Beidou short message solves the problem of monitoring data transmission, and the Beidou high-precision time service provides a unified time reference for equipment data. However, how to deeply combine these two capabilities to raise the perception and pre-control level of the grid systematic risk remains the focus of current technological exploration. Currently, prior art solutions are directed to utilizing Beidou to boost power monitoring levels. For example, the chinese patent application CN119780585B discloses a method for monitoring the state of electrical equipment based on Beidou high-precision time service, which acquires a precise time service signal by compensating ionosphere delay, synchronizes multi-source data of the equipment, and finally analyzes the operation parameters of the equipment by using an artificial intelligent model to realize diagnosis and alarm of the health state of the equipment. This solution represents an advanced level of equipment level condition monitoring. However, in the actual business scenario of the power grid, the isolated warning of a single power device (such as an online monitoring device) cannot directly reveal the potential basic risk of the key node of the power grid where the single power device is located (such as a transformer substation for supplying power to the single power device). Because the core steps of the above technical solution are completely focused on the synchronization and analysis of the data of the equipment, the logic determines that the output result can only be the health assessment of the equipment body, and when an equipment abnormality alarm from a remote area is received, the existing system lacks a necessary technical path to automatically associate and evaluate the health status of core infrastructure such as a time synchronization network of a power grid node (such as an upper-level transformer station) on which the equipment depends, which makes it difficult for an operator to judge whether the equipment alarm is an independent local event or an early sign of a serious global power grid node instability risk, so that a warning window of systematic risk may be missed. Therefore, a method for deeply fusing Beidou time service and short message communication capability is needed, original communication data are converted into intelligent information with the meaning of the running context of the power grid, and the three-dimensional perception and accurate control capability of the power grid in a public network-free area is effectively improved. Disclosure of Invention In order to solve the problems in the prior art, the invention provides a power grid collaborative monitoring method and a power grid collaborative monitoring system based on Beidou time service states and short messages. The technical scheme of the invention is as follows: On the one hand, the invention provides a power grid collaborative monitoring method based on Beidou time service state and short messages, which comprises the following steps: Receiving a communication data packet sent by an electric power terminal through a Beidou short message, wherein the communication data packet comprises identity information and geographic position information of the electric power terminal; Based on a Beidou time service network of the power system, acquiring predictive time-space state information of a power grid node associated with the geographic position information, wherein the predictive time-space state information comprises a predicted time synchronization deviation evolution trend of the power grid node; Mapping the geographic position information of the power terminal to a power grid GIS topological model, obtaining a corresponding power facility identifier, binding the predictive space-time state information corresponding to the power grid node where the power facility identifier is located with the communication data packet as a tag, and generating a fusion data packet; And distributing the fusion data packet to a corresponding power grid service application system according to the state type indicated by the predictive space-time st