CN-122026535-A - Typhoon region micro-grid regulation and control method and system considering power interaction between micro-grids

CN122026535ACN 122026535 ACN122026535 ACN 122026535ACN-122026535-A

Abstract

The application provides a typhoon region micro-grid regulation and control method and system considering power interaction between micro-grids, and relates to the field of micro-grid regulation and control, wherein the method comprises the steps of obtaining load data of a target micro-grid in a typhoon region, and identifying and obtaining overload degree; the method comprises the steps of obtaining historical interaction data of a plurality of support micro-networks, extracting a historical support period, a historical support frequency and a historical support power curve, calculating a support success rate and extracting support capacity data, determining the scheduling priority of the support micro-networks by combining the preset weight of the support micro-networks, obtaining available power of a local energy storage system, generating a power support instruction by combining the available power according to overload degree, the support capacity data and the scheduling priority, and enabling the support micro-networks to cooperate with the local energy storage system to output power to a distribution bus of a target micro-grid, so that regulation and control of the target micro-grid are achieved. The application can effectively improve the regulation toughness and the power supply stability of the target micro-grid in complex scenes such as typhoon areas and the like.

Inventors

KONG FANFANG
LUO TAO
YANG QIAOQIAO
CHEN JIABING
LI FENGHONG
LIN XIAOSHAN
PAN YIWEI
YAO WENJUN
SUN JINGLIAO
JIN QIANG
SUN QIANHAO
YANG BINLUN
XIE HUASEN
CHEN QINGHUI

Assignees

国网浙江省电力有限公司温州供电公司
北京交通大学
国网经济技术研究院有限公司

Dates

Publication Date: 20260512
Application Date: 20260415

Claims (10)

1. A typhoon area micro-grid regulation and control method considering power interaction among micro-grids is characterized by comprising the following steps: Load data of a target micro-grid in a typhoon area are acquired, and overload degree is obtained through recognition based on the load data; When the overload degree is larger than a preset overload threshold value, acquiring historical interaction data of a plurality of support micro-networks; Calculating a support success rate according to the history support period and the history support times; Combining a preset weight of the support micro-network on the basis of the support success rate and the support capacity data to determine the scheduling priority of the support micro-network; The method comprises the steps of obtaining available power of a local energy storage system, generating power support instructions according to the overload degree, support capacity data and scheduling priority in combination with the available power, and respectively sending the power support instructions to each support micro-grid so that the support micro-grids cooperate with the local energy storage system to output power to a distribution bus of a target micro-grid according to the power support instructions, and therefore regulation and control of the target micro-grid are achieved.
2. The typhoon regional micro grid regulation method considering power interaction between micro grids according to claim 1, wherein the generating the power support command according to the overload degree, the support capacity data and the scheduling priority in combination with the available power of the local energy storage system comprises: Determining real-time overload power of the target micro-grid according to the overload degree; When the available power is smaller than the real-time overload power, taking the real-time overload power as a reduced number, taking the available power as a reduced number, and calculating to obtain a total power gap which needs to be supplemented by the support micro-grid; According to the scheduling priority, combining the supporting capacity data of each supporting micro-network, and sequentially distributing the total power gap to each supporting micro-network according to the proportion and sequence corresponding to each scheduling priority to obtain the target supporting power of each supporting micro-network, wherein the proportion corresponding to each scheduling priority is preconfigured; And generating the power support instruction according to the target support power.
3. A typhoon regional micro grid regulation method accounting for power interactions between micro grids as claimed in claim 2, wherein said generating said power support command based on said target support power comprises: Generating a basic instruction containing the target support power and the power distribution network bus identification of the target micro-grid for each support micro-grid respectively; reading dynamic parameters of an energy storage unit supporting the micro-grid, wherein the dynamic parameters comprise an SOC value, a charge-discharge power limit and current output power; Setting a power change rate according to the dynamic parameters, so as to generate a power change curve supporting the micro-grid; Generating a power balance curve according to the power change curve, the real-time output power of the local energy storage system and the load power of the target micro-grid; And updating the target support power based on the power balance curve and the total power gap to obtain updated support power, and generating a power support instruction containing the updated support power and the target micro-grid distribution network bus identification.
4. The typhoon regional micro grid regulation method taking into account power interactions between micro grids according to claim 1, wherein the obtaining available power of the local energy storage system comprises: Acquiring real-time meteorological data of the typhoon area, and calculating signal attenuation parameters of satellite communication according to the real-time meteorological data and a preset signal attenuation model; calculating to obtain a communication interruption risk coefficient of the target micro-grid based on the signal attenuation parameters; Obtaining vibration displacement data of a tower foundation of a ground microwave link, calculating the unlocking probability of the microwave link according to the vibration displacement data, and monitoring whether a double communication interruption state occurs according to the unlocking probability and the communication interruption risk coefficient; And when the dual communication interruption state is determined, acquiring state data of a local energy storage system, and analyzing according to the state data of the local energy storage system to obtain the available power.
5. The method for regulating and controlling a typhoon regional micro-grid according to claim 4, wherein the step of calculating the unlocking probability of a microwave link according to the vibration displacement data and monitoring whether a double communication interruption state occurs according to the unlocking probability and the communication interruption risk coefficient comprises the steps of: Acquiring wind load data through a wind speed sensor, and carrying out correlation analysis on the wind load data and the displacement change rate to obtain a correlation analysis result; marking an offset overrun point in a pointing angle curve of the microwave antenna according to the correlation analysis result to obtain an antenna unlocking moment point; counting an out-of-lock duration according to the out-of-lock time point of the antenna, establishing a transition probability matrix of the antenna locking and the out-of-lock through a two-state Markov chain, calculating steady-state distribution through the transition probability matrix, and further generating a probability density function; constructing a state transition map of the target micro-grid according to the probability density function; And judging that the double communication interruption state occurs when the loss lock probability value of the state transition pattern exceeds a preset double interruption threshold value and the communication interruption risk coefficient of the state transition pattern is larger than a preset historical statistic reference value according to the state transition pattern, and otherwise, judging that the double communication interruption state does not occur.
6. A typhoon regional micro grid regulation method accounting for power interactions between micro grids as recited in claim 5, wherein said calculating a displacement change rate from said vibration displacement data comprises: performing Butterworth low pass filtering on the vibration displacement data to obtain filtering data; according to the vibration characteristics, calculating spectrum density distribution through fast Fourier transform, and extracting a main frequency component value based on the spectrum density distribution; recording vibration frequency data points in the azimuth angle deviation range of the antenna according to the main frequency component value to obtain a frequency characteristic curve; and calculating the displacement change rate based on the frequency characteristic curve and the vibration characteristic.
7. The typhoon regional micro grid regulation method considering power interaction between micro grids according to claim 1, wherein determining the scheduling priority of the support micro grid by combining the preset weight of the support micro grid on the basis of the support success rate and the support capacity data comprises: respectively reading power transmission loss data and response time data between each support micro-grid and the target micro-grid, comprehensively evaluating the power transmission loss data and the response time data to obtain a support evaluation result; configuring basic weight according to the power transmission loss data, configuring time weight according to the response time data, and configuring historical weight according to the support success rate and the support capacity data; And superposing the support evaluation result with the optimization weight to obtain a priority quantized value of each support micro-network, and determining the scheduling priority of the support micro-network based on the priority quantized value.
8. The typhoon regional micro grid regulation and control method considering power interaction among micro grids according to claim 1, wherein the load data is represented by equipment load, and the identifying and obtaining the overload degree based on the load data comprises the following steps: Acquiring historical working condition data of the typhoon area, wherein the historical working condition data comprises a deviation value of the typhoon working condition affecting the load; Recording the phase difference value of the equipment load by fixing the sampling interval; Calculating the active power of the equipment and the reactive power of the equipment based on the power factor curve; Constructing a load fluctuation data set according to the phase difference value, the fluctuation amplitude point, the equipment active power and the equipment reactive power; And comparing and analyzing the load fluctuation data set with the historical working condition data, and identifying to obtain the overload degree.
9. A typhoon region micro-grid regulation and control system considering power interaction among micro-grids is characterized by comprising an overload identification module, a historical data extraction module, a support data extraction module, a scheduling priority determination module and a regulation and control module, wherein, The overload recognition module is used for acquiring load data of a target micro-grid in the typhoon area and recognizing and obtaining overload degree based on the load data; The historical data extraction module is used for acquiring historical interaction data of a plurality of support micro-networks when the overload degree is larger than a preset overload threshold value; The support data extraction module is used for calculating the support success rate according to the historical support period and the historical support times; the scheduling priority determining module is used for determining the scheduling priority of the support micro-network by combining the preset weight of the support micro-network on the basis of the support success rate and the support capacity data; The control module is used for acquiring available power of the local energy storage system, generating a power support instruction according to the overload degree, support capacity data and scheduling priority in combination with the available power, and respectively sending the power support instruction to each support micro-grid so that the support micro-grid can cooperate with the local energy storage system to output power to a distribution bus of a target micro-grid according to the power support instruction, thereby realizing control of the target micro-grid.
10. The typhoon regional micro grid regulation system accounting for power interactions between micro grids of claim 9, wherein the regulation module generates power support instructions based on the degree of overload, support capacity data, scheduling priority in combination with available power of a local energy storage system, comprising: The regulation and control module determines real-time overload power of the target micro-grid according to the overload degree; When the available power is smaller than the real-time overload power, taking the real-time overload power as a reduced number, taking the available power as a reduced number, and calculating to obtain a total power gap which needs to be supplemented by the support micro-grid; According to the scheduling priority, combining the supporting capacity data of each supporting micro-network, and sequentially distributing the total power gap to each supporting micro-network according to the proportion and sequence corresponding to each scheduling priority to obtain the target supporting power of each supporting micro-network, wherein the proportion corresponding to each scheduling priority is preconfigured; And generating the power support instruction according to the target support power.

Description

Typhoon region micro-grid regulation and control method and system considering power interaction between micro-grids Technical Field The invention relates to the field of micro-grid regulation and control, in particular to a typhoon area micro-grid regulation and control method and system considering power interaction among micro-grids. Background In some remote areas, micro-grids are the core of distributed energy systems, which typically provide power to users in the remote areas in an islanding state of the grid. However, in extreme scenes such as direct impact of typhoon wall, the problem of system failure of complex and multiple influencing factors is often faced, so that the stability of power supply is influenced. Generally, a micro-grid relies on satellite communication or a ground microwave link to perform data transmission and coordination, but under the influence of external factors such as typhoons, signal attenuation is often caused to cause link unlocking, the quality of data transmission is influenced, and meanwhile, under the influence of typhoons disasters, instantaneous load surge (such as the increase of electricity consumption of places such as schools, clinics or avoidance points under typhoons) is caused. When facing the influence, the micro-grid generally invokes local energy storage to ensure the stability of power supply, but the adjustment mode is limited by the scale of the local energy storage, so that the micro-grid has insufficient adjustment toughness in complex scenes such as typhoon areas and the like, and meanwhile, the stability of power supply still has room for further improvement. Disclosure of Invention The invention provides a typhoon region micro-grid regulation and control method and system considering power interaction among micro-grids, which are used for solving the technical problem of how to improve the regulation and control toughness of a target micro-grid in a typhoon region and improving the power supply stability of the target micro-grid. In order to solve the technical problems, the application of the invention provides a typhoon region micro-grid regulation and control method and system considering power interaction among micro-grids, comprising the following steps: Load data of a target micro-grid in a typhoon area are acquired, and overload degree is obtained through recognition based on the load data; When the overload degree is larger than a preset overload threshold value, acquiring historical interaction data of a plurality of support micro-networks; Calculating a support success rate according to the history support period and the history support times; Combining a preset weight of the support micro-network on the basis of the support success rate and the support capacity data to determine the scheduling priority of the support micro-network; The method comprises the steps of obtaining available power of a local energy storage system, generating power support instructions according to the overload degree, support capacity data and scheduling priority in combination with the available power, and respectively sending the power support instructions to each support micro-grid so that the support micro-grids cooperate with the local energy storage system to output power to a distribution bus of a target micro-grid according to the power support instructions, and therefore regulation and control of the target micro-grid are achieved. Preferably, the generating a power support instruction according to the overload degree, the support capacity data, the scheduling priority and the available power of the local energy storage system includes: Determining real-time overload power of the target micro-grid according to the overload degree; When the available power is smaller than the real-time overload power, taking the real-time overload power as a reduced number, taking the available power as a reduced number, and calculating to obtain a total power gap which needs to be supplemented by the support micro-grid; According to the scheduling priority, combining the supporting capacity data of each supporting micro-network, and sequentially distributing the total power gap to each supporting micro-network according to the proportion and sequence corresponding to each scheduling priority to obtain the target supporting power of each supporting micro-network, wherein the proportion corresponding to each scheduling priority is preconfigured; And generating the power support instruction according to the target support power. Preferably, the generating the power assisting instruction according to the target assisting power includes: Generating a basic instruction containing the target support power and the power distribution network bus identification of the target micro-grid for each support micro-grid respectively; reading dynamic parameters of an energy storage unit supporting the micro-grid, wherein the dynamic parameters comprise an SOC value, a charge-discharge