Power system dynamic simulation device multi-device operation state snapshot shooting method and system

Abstract

The application discloses a kind of power system dynamic simulation device multi-device operating state snapshot shooting method and system, it is related to power system dynamic simulation technical field, which comprises configuring snapshot shooting parameter of main station in power system dynamic simulation device, and snapshot shooting parameter is sent to each slave station;According to the sampling rate of each sampling channel in slave station, the local basic frame rate of slave station is calculated, and the global basic frame rate of main station is determined;When meeting trigger condition, control slave station sends synchronous sampling request to main station, and control main station activates each slave station synchronous start data collection by high real-time signal;Based on frame alignment mechanism, the time synchronization of power equipment operating data collected by each slave station is processed;After the power equipment operating data after time alignment is compressed, it is transmitted to main station storage, and the multi-device operating state snapshot is obtained.The application can realize the accurate and synchronous collection of power system dynamic simulation device multi-device operating data.

Description

Technical Field

[0001] This application relates to the field of power system dynamic simulation technology, and in particular to a method and system for taking snapshots of the operating status of multiple devices in a power system dynamic simulation device. Background Technology

[0002] As power systems become increasingly complex, accurate simulation of their dynamic behavior becomes crucial. Existing simulation methods often lack the ability to accurately capture the states of multiple devices operating simultaneously, making it difficult to comprehensively analyze system performance and troubleshoot faults. Summary of the Invention

[0003] The purpose of this application is to provide a method and system for capturing snapshots of the operating status of multiple devices in a power system dynamic simulation device, which can coordinate and control multiple slave stations to accurately and synchronously collect the operating data of each device in the power system.

[0004] To achieve the above objectives, this application provides the following solution:

[0005] In a first aspect, this application provides a method for capturing snapshots of the operating status of multiple devices in a power system dynamic simulation device, including:

[0006] Configure the snapshot shooting parameters of the master station in the power system dynamic simulation device, and send the snapshot shooting parameters to each slave station in the power system dynamic simulation device; the snapshot shooting parameters include trigger type, snapshot shooting time point and pre-positioning process;

[0007] When each slave station receives the snapshot capture parameters, for each slave station, the local base frame rate of the slave station is calculated based on the sampling rate of each sampling channel in the slave station;

[0008] The global base frame rate of the master station is determined based on the local base frame rate of each slave station.

[0009] When the triggering conditions are met, the control slave station sends a synchronous sampling request to the master station, and the control master station activates each slave station to synchronously start data acquisition through a high real-time signal to obtain the power equipment operation data; the data acquisition is performed based on the global base frame rate.

[0010] Based on the frame alignment mechanism, the power equipment operation data collected by each slave station is processed for time synchronization to obtain time-aligned power equipment operation data;

[0011] After the time-aligned power equipment operation data is compressed, it is transmitted to the main station for storage to obtain a snapshot of the operation status of multiple devices.

[0012] Optionally, the frame alignment mechanism includes frame data shifting and interpolation shifting.

[0013] Optionally, based on a frame alignment mechanism, the power equipment operation data collected by each slave station is subjected to time synchronization processing to obtain time-aligned power equipment operation data, specifically including:

[0014] When the frame alignment mechanism is frame data shifting, the original sampling time sequence of each slave station sampling channel and the basic frame period of the power system dynamic simulation device are obtained; the basic frame period of the power system dynamic simulation device is determined according to the global basic frame rate of the master station.

[0015] The original sampling points of each slave station sampling channel are mapped to the nearest base frame time to obtain time-aligned power equipment operation data.

[0016] Optionally, the formula expression for the time-aligned power equipment operating data is:

[0017] y ij (t′ n )=x ij (t k );

[0018] Among them, t k Indicates the sampling time, t′ n For the closest base frame time, t n =n·T base , T base This serves as the base frame period for the power system dynamic simulation device. F base Let n be the global base frame rate; n is the value that satisfies |t k -t′ n |=min(|t k -m·T base |) integers.

[0019] Optionally, based on a frame alignment mechanism, the power equipment operation data collected by each slave station is subjected to time synchronization processing to obtain time-aligned power equipment operation data, specifically including:

[0020] When the frame alignment mechanism is interpolation shift, the original sampling time sequence of each slave station sampling channel and the basic frame period of the power system dynamic simulation device are obtained; the basic frame period of the power system dynamic simulation device is determined according to the global basic frame rate of the master station.

[0021] The basic frame time is determined based on the basic frame period of the power system dynamic simulation device;

[0022] For the base frame time, the data value corresponding to the base frame time is calculated by the difference method to obtain the interpolated and shifted data sequence; the interpolated and shifted data sequence is the time-aligned power equipment operation data.

[0023] Optionally, the global base frame rate of the master station is determined based on the local base frame rate of each of the slave stations, specifically including:

[0024] The global base frame rate of the master station is calculated based on the least common multiple of the local base frame rates of each slave station.

[0025] Optionally, the formula for the local base frame rate is:

[0026]

[0027] Where i is the slave station, f ij Let N be the sampling rate of the j-th sampling channel of the i-th slave station. i For the Nth i One sampling channel.

[0028] Optionally, the formula for the global base frame rate is:

[0029]

[0030] Among them, F i For the local base frame rate, N S This represents the total number of stations.

[0031] Secondly, this application provides a multi-device operation status snapshot capture system for a power system dynamic simulation device, comprising:

[0032] The configuration module is used to configure the snapshot shooting parameters of the master station in the power system dynamic simulation device, and send the snapshot shooting parameters to each slave station in the power system dynamic simulation device; the snapshot shooting parameters include trigger type, snapshot shooting time point and pre-positioning process;

[0033] The local base frame rate calculation module is used to calculate the local base frame rate of each slave station based on the sampling rate of each sampling channel in the slave station when each slave station receives the snapshot shooting parameters.

[0034] The global base frame rate calculation module is used to determine the global base frame rate of the master station based on the local base frame rates of each slave station.

[0035] The data acquisition module is used to control the slave stations to send a synchronous sampling request to the master station when the trigger conditions are met, and to control the master station to activate each slave station to synchronously start data acquisition through a high real-time signal to obtain the power equipment operation data; the data acquisition is based on the global base frame rate.

[0036] The alignment module is used to perform time synchronization processing on the power equipment operation data collected by each slave station based on the frame alignment mechanism, so as to obtain time-aligned power equipment operation data;

[0037] The storage module is used to compress the time-aligned power equipment operation data and then transmit it to the main station storage to obtain a snapshot of the operation status of multiple devices.

[0038] Optionally, the global base frame rate calculation module includes:

[0039] The frame rate calculation unit is used to calculate the global base frame rate of the master station based on the least common multiple of the local base frame rates of each of the slave stations.

[0040] According to the specific embodiments provided in this application, the following technical effects are disclosed:

[0041] This application provides a method and system for capturing snapshots of the operating status of multiple devices in a power system dynamic simulation device. First, the snapshot capture parameters of the master station in the power system dynamic simulation device are configured and sent to each slave station. These parameters include trigger type, snapshot capture time point, and pre-positioning process. After receiving the snapshot capture parameters, each slave station calculates its local base frame rate based on the sampling rate of its respective sampling channel, and then determines the global base frame rate of the master station based on these local base frame rates. This establishes a unified time reference for the data acquisition of the entire system, ensuring the consistency of data acquisition rhythm among the slave stations and providing a time standard for accurate synchronous acquisition. When the trigger condition is met, the control slave station sends a synchronous sampling request to the master station. Simultaneously, the master station activates each slave station to synchronously start data acquisition using a high real-time signal, with the acquisition based on the global base frame rate. The high real-time signal ensures the timeliness and accuracy of command transmission. Starting acquisition based on a unified global base frame rate ensures that each slave station starts acquiring data at the same time and at the same rate, achieving synchronous acquisition actions. After acquisition is completed, the power equipment operating data acquired by each slave station is processed for time synchronization based on a frame alignment mechanism. Further calibration is performed to address any minor time discrepancies that may occur during data acquisition and transmission, ensuring strict time alignment of data collected from different slave stations and guaranteeing accurate time synchronization. After time synchronization processing, the data is compressed before being transmitted to the master station for storage, resulting in a snapshot of the multi-device operating status. Compression reduces data transmission volume and improves efficiency without compromising accuracy and synchronization, ultimately ensuring that the operating data of each device is stored accurately and synchronously at the master station, forming an effective snapshot of the multi-device operating status. Attached Figure Description

[0042] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0043] Figure 1 A flowchart illustrating a method for capturing snapshots of the operating status of multiple devices in a power system dynamic simulation device, provided in an embodiment of this application;

[0044] Figure 2 A logic diagram of a method for capturing snapshots of the operating status of multiple devices in a power system dynamic simulation device, provided in an embodiment of this application;

[0045] Figure 3 This is a schematic diagram of the multi-device operation status snapshot capture system structure of a power system dynamic simulation device provided in an embodiment of this application. Detailed Implementation

[0046] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0047] To make the above-mentioned objectives, features and advantages of this application more apparent and understandable, the application will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0048] Example 1

[0049] like Figure 1 As shown, this embodiment provides a method for capturing snapshots of the operating status of multiple devices in a power system dynamic simulation device, including:

[0050] Step 101: Configure the snapshot shooting parameters of the master station in the power system dynamic simulation device, and send the snapshot shooting parameters to each slave station in the power system dynamic simulation device; the snapshot shooting parameters include trigger type, snapshot shooting time point, and pre-positioning process;

[0051] Step 102: When each slave station receives the snapshot capture parameters, for each slave station, calculate the local base frame rate of the slave station based on the sampling rate of each sampling channel in the slave station;

[0052] Step 103: Determine the global base frame rate of the master station based on the local base frame rate of each slave station;

[0053] Step 104: When the triggering condition is met, the control slave station sends a synchronization sampling request to the master station, and the control master station activates each slave station to synchronously start data acquisition through a high real-time signal to obtain the power equipment operation data; the data acquisition is based on the global base frame rate.

[0054] Step 105: Based on the frame alignment mechanism, perform time synchronization processing on the power equipment operation data collected by each slave station to obtain time-aligned power equipment operation data;

[0055] Step 106: After compressing the time-aligned power equipment operation data, the data is transmitted to the main station for storage to obtain a snapshot of the operation status of multiple devices.

[0056] In some embodiments, when performing steps 101-106, such as Figure 2 As shown, the specific details are as follows:

[0057] The system consists of a master station and multiple slave stations. The master station is responsible for coordination and control, setting snapshot capture requirements (including trigger conditions and time), and storing system snapshot data, while the slave stations are responsible for collecting data from connected devices.

[0058] Specifically, the master station is configured as follows: The master station runs a software module that can set and send snapshot capture parameters to each slave station. These parameters include: trigger type (e.g., voltage threshold, switch, timer, etc.), snapshot capture time point, and specific requirements for the pre-positioning process.

[0059] The slave station configuration is as follows: Each slave station is equipped with a hardware triggering mechanism to ensure consistency in sampling timing with the master station and other slave stations. Each slave station has an ADC for digitizing analog signals and can enter a pre-positioned state upon receiving a command from the master station.

[0060] Upon receiving the pre-positioning command from the master station, all slave stations stop their ADC sampling and enter the sampling pre-positioning state. The slave stations report the sampling rate of each sampling channel to the master station and calculate the base frame rate. The least common multiple (LCM) method is used to ensure that the sampling rate of all sampling channels of all slave stations is divisible by this base frame rate. This guarantees that data from each channel can be synchronously acquired within each base frame period. Assume there are N... S There are *n* slave stations, and the *i*-th slave station has *N* sampling channels. For the *j*-th channel of the *i*-th slave station, its sampling rate is *f*. ij Find a base frame rate F base This makes F so that for all channels of all slave stations, base Their respective sampling rates f ijInteger multiples of.

[0061] The specific steps are as follows:

[0062] a) Calculate the base frame rate for each slave station: For each slave station i, a local base frame rate F needs to be calculated. i It is the least common multiple of the sampling rates of all sampling channels of that slave station. For the i-th slave station, the local base frame rate is...

[0063] b) Calculate the base frame rate of the snapshot acquisition system: Calculate the base frame rate of the acquisition system at the main station, the global base frame rate F of the entire system. base It should be the least common multiple of the local base frame rate of all slave stations.

[0064] Then, the ADC with the priority activation trigger condition starts sampling. When the predetermined trigger condition is met (e.g., voltage exceeds a threshold, switching action, or timer countdown ends), the following steps are executed:

[0065] a) A slave station triggering a specified condition sends a synchronization sampling request to the master station via a general-purpose input and output (GPIO) interface, fiber optic signal, or other high-real-time signals.

[0066] b) After receiving the synchronization sampling request, the master station activates all slave stations to start synchronous sampling through high real-time signals such as General Purpose Input and Output (GPIO) interface and fiber optic signals, that is, to start capturing snapshots.

[0067] c) After receiving the synchronization sampling signal, all slave stations will synchronously complete the collection of power equipment operation data according to the preset time window and temporarily store the results in the local cache.

[0068] Then, the time synchronization of power equipment operation data is handled: This embodiment introduces two frame alignment mechanisms:

[0069] a) Frame data shift: For the j-th channel of slave station i, its sampling rate is f ij The system's base frame rate is F. base Since each slave station may have a different sampling rate, the data needs to be shifted and aligned according to a common base frame rate. Assume the data sequence acquired by the j-th channel of slave station i is {x}. ij}(t k ), where t k Represents the sampling time, and satisfies:

[0070] tk =k·T ij ,

[0071] Where T ij It is the sampling period of the j-th channel from station i.

[0072] The system's basic frame period is:

[0073]

[0074] For each sampling point t k Find the closest base frame time t′ n And shift its data to that time:

[0075] t′ n =n·T base ,

[0076] Where m is an integer that satisfies the following conditions:

[0077] |t k -t′ n |=min(|t k -m·T base |),

[0078] Finally, the data sequence {y} after the frame data is shifted ij}(t′ n ), can be represented as:

[0079] y ij (t′ n )=x ij (t k );

[0080] Where t′ n Satisfy |t k -t′ n |=min(|t k -m·T base |), m∈Z.

[0081] Finally, each sampling point is mapped to the nearest base frame time to complete the time alignment of the data.

[0082] b) Interpolation shift: For the j-th channel of slave station i, if its sampling rate does not perfectly match the base frequency, a new data sequence can be generated by interpolation calculation to align it with the base frame rate.

[0083] Suppose the data sequence collected from the j-th channel of station i is {x} ij}(t k), where t k Represents the sampling time, and satisfies:

[0084] t k =k·T ij ,

[0085] The system's base frame time is:

[0086] t′ n =n·T base ,

[0087] For each base frame time t′ n The corresponding data values ​​are calculated using linear interpolation or higher-order interpolation methods (such as Lagrange interpolation, spline interpolation, etc.). Taking linear interpolation as an example:

[0088]

[0089] Where t k and t k+1 It is closest to t′ n At the two sampling times, the following condition is met:

[0090] t k ≤t′ n <t k+1 .

[0091] Finally, the interpolated and shifted data sequence {y ij}(t′ n ), can be represented as:

[0092] y ij (t′ n )=x ij (t k ).

[0093] A new data sequence is generated using interpolation methods, precisely aligned to the base frame time. The choice of interpolation method can be determined based on accuracy requirements (e.g., linear interpolation is suitable for simple scenarios, while spline interpolation is suitable for high-precision requirements).

[0094] After obtaining the time-aligned power equipment operating data, the data compression processing and transmission can be carried out as follows:

[0095] This embodiment proposes a method combining an adaptive sampling rate compression algorithm and predictive coding, aiming to reduce storage space while maintaining data accuracy. The specific steps are as follows:

[0096] a) Adaptive sampling rate compression: This method dynamically adjusts the sampling frequency by analyzing the rate of signal change, thereby reducing the amount of data while ensuring that critical information is not lost. First, it is based on the system's common base frame rate F. base Determine the initial sampling rate. Calculate the difference or slope between adjacent sample points as a measure of signal change.

[0097] If the change exceeds a preset threshold, the signal is considered to have changed significantly within this range, and the common base frame rate is used as the sampling frequency. If the change is below the preset threshold, the signal is considered relatively stable, and the sampling frequency can be appropriately reduced. In addition to recording the data of the actual sampling points, information on each sampling rate adjustment (e.g., the value of the reduction in the sampling rate) also needs to be recorded.

[0098] b) Predictive Coding: Compression is achieved by predicting data from one or more previous time steps and storing the prediction error. First, a suitable prediction model is selected, such as linear prediction or autoregressive models. Based on the selected model, the signal value for the next time step is predicted, and the error between the actual and predicted values ​​is calculated. The prediction error is quantized, and then further compressed using entropy coding (such as Huffman coding or arithmetic coding).

[0099] c) Combining Adaptive Sampling Rate Compression with Predictive Coding: First, adaptive sampling rate compression is applied, dynamically adjusting the sampling frequency based on signal characteristics to reduce unnecessary high-density sampling. Then, predictive coding is applied to further compress the dataset after adaptive sampling rate compression, primarily focusing on efficiently encoding prediction errors.

[0100] Example 2

[0101] like Figure 3 As shown, this embodiment provides a multi-device operation status snapshot capture system for a power system dynamic simulation device, including:

[0102] Configuration module 301 is used to configure the snapshot shooting parameters of the master station in the power system dynamic simulation device, and send the snapshot shooting parameters to each slave station in the power system dynamic simulation device; the snapshot shooting parameters include trigger type, snapshot shooting time point and pre-positioning process.

[0103] The local base frame rate calculation module 302 is used to calculate the local base frame rate of each slave station based on the sampling rate of each sampling channel in the slave station when each slave station receives the snapshot shooting parameters.

[0104] The global base frame rate calculation module 303 is used to determine the global base frame rate of the master station based on the local base frame rates of each slave station.

[0105] The data acquisition module 304 is used to control the slave station to send a synchronous sampling request to the master station when the triggering condition is met, and to control the master station to activate each slave station to synchronously start data acquisition through a high real-time signal to obtain the power equipment operation data; the data acquisition is performed based on the global base frame rate.

[0106] Alignment module 305 is used to perform time synchronization processing on the power equipment operation data collected by each slave station based on the frame alignment mechanism to obtain time-aligned power equipment operation data;

[0107] Storage module 306 is used to compress the time-aligned power equipment operation data and then transmit it to the main station for storage to obtain a snapshot of the operation status of multiple devices.

[0108] The global base frame rate calculation module 303 includes:

[0109] The frame rate calculation unit is used to calculate the global base frame rate of the master station based on the least common multiple of the local base frame rates of each of the slave stations.

[0110] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0111] This document uses specific examples to illustrate the principles and implementation methods of this application. The descriptions of the above embodiments are only for the purpose of helping to understand the methods and core ideas of this application. Furthermore, those skilled in the art will recognize that, based on the ideas of this application, there will be changes in the specific implementation methods and application scope. Therefore, the content of this specification should not be construed as a limitation of this application.

Claims

1. A method for capturing snapshots of the operating status of multiple devices in a power system dynamic simulation device, characterized in that, include: Configure the snapshot shooting parameters of the master station in the power system dynamic simulation device, and send the snapshot shooting parameters to each slave station in the power system dynamic simulation device; the snapshot shooting parameters include trigger type, snapshot shooting time point and pre-positioning process; When each slave station receives the snapshot capture parameters, for each slave station, the local base frame rate of the slave station is calculated based on the sampling rate of each sampling channel in the slave station; The global base frame rate of the master station is determined based on the local base frame rate of each slave station. When the triggering conditions are met, the control slave station sends a synchronous sampling request to the master station, and the control master station activates each slave station to synchronously start data acquisition through a high real-time signal to obtain the power equipment operation data; the data acquisition is performed based on the global base frame rate. Based on the frame alignment mechanism, the power equipment operation data collected by each slave station is processed for time synchronization to obtain time-aligned power equipment operation data; the frame alignment mechanism includes frame data shifting and interpolation shifting; Based on the frame alignment mechanism, the power equipment operation data collected by each slave station is processed for time synchronization to obtain time-aligned power equipment operation data, specifically including: When the frame alignment mechanism is frame data shifting, the original sampling time sequence of each slave station sampling channel and the basic frame period of the power system dynamic simulation device are obtained; the basic frame period of the power system dynamic simulation device is determined according to the global basic frame rate of the master station. The original sampling points of each slave station sampling channel are mapped to the nearest base frame time to obtain time-aligned power equipment operation data; The formula expression for the time-aligned power equipment operation data is: ； in, Indicates the sampling time. The closest base frame time, ; This serves as the base frame period for the power system dynamic simulation device. ; This is the global base frame rate; n To meet integers, , For the station The Data sequences collected from each channel This is the data sequence after the frame data has been shifted. After the time-aligned power equipment operation data is compressed, it is transmitted to the main station for storage to obtain a snapshot of the operation status of multiple devices.

2. The method for capturing snapshots of the operating status of multiple devices in a power system dynamic simulation device according to claim 1, characterized in that, Based on the frame alignment mechanism, the power equipment operation data collected by each slave station is processed for time synchronization to obtain time-aligned power equipment operation data, specifically including: When the frame alignment mechanism is interpolation shift, the original sampling time sequence of each slave station sampling channel and the basic frame period of the power system dynamic simulation device are obtained; the basic frame period of the power system dynamic simulation device is determined according to the global basic frame rate of the master station. The basic frame time is determined based on the basic frame period of the power system dynamic simulation device; For the base frame time, the data value corresponding to the base frame time is calculated by interpolation method to obtain the interpolated and shifted data sequence; the interpolated and shifted data sequence is the time-aligned power equipment operation data.

3. The method for capturing snapshots of the operating status of multiple devices in a power system dynamic simulation device according to claim 1, characterized in that, Based on the local base frame rate of each slave station, the global base frame rate of the master station is determined, specifically including: The global base frame rate of the master station is calculated based on the least common multiple of the local base frame rates of each slave station.

4. The method for capturing snapshots of the operating status of multiple devices in a power system dynamic simulation device according to claim 3, characterized in that, The formula for the local base frame rate is as follows: ； in, For the station, For the first The first from the station Sampling rate of each sampling channel For the first There are 1 sampling channel, and LCM is the least common multiple function.

5. The method for capturing snapshots of the operating status of multiple devices in a power system dynamic simulation device according to claim 4, characterized in that, The formula for the global base frame rate is as follows: ； in, For the local base frame rate, This represents the total number of stations.

6. A multi-device operation status snapshot capture system for a power system dynamic simulation device, used to implement the multi-device operation status snapshot capture method for a power system dynamic simulation device as described in claim 1, characterized in that, include: The configuration module is used to configure the snapshot shooting parameters of the master station in the power system dynamic simulation device, and send the snapshot shooting parameters to each slave station in the power system dynamic simulation device; the snapshot shooting parameters include trigger type, snapshot shooting time point and pre-positioning process; The local base frame rate calculation module is used to calculate the local base frame rate of each slave station based on the sampling rate of each sampling channel in the slave station when each slave station receives the snapshot shooting parameters. The global base frame rate calculation module is used to determine the global base frame rate of the master station based on the local base frame rates of each slave station. The data acquisition module is used to control the slave stations to send a synchronous sampling request to the master station when the trigger conditions are met, and to control the master station to activate each slave station to synchronously start data acquisition through a high real-time signal to obtain the power equipment operation data; the data acquisition is based on the global base frame rate. The alignment module is used to perform time synchronization processing on the power equipment operation data collected by each slave station based on the frame alignment mechanism, so as to obtain time-aligned power equipment operation data; The storage module is used to compress the time-aligned power equipment operation data and then transmit it to the main station storage to obtain a snapshot of the operation status of multiple devices.

7. A multi-device operation status snapshot capture system for a power system dynamic simulation device according to claim 6, characterized in that, The global base frame rate calculation module includes: The frame rate calculation unit is used to calculate the global base frame rate of the master station based on the least common multiple of the local base frame rates of each of the slave stations.

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