Underground power distribution room waterlogging power failure risk assessment and risk map drawing method and system
By conducting rainfall inundation simulation and risk assessment based on the geographic model, the flooding and power outage risk level of the underground distribution room is accurately assessed, which solves the problem of difficulty in identifying risk levels in existing technologies and achieves accurate identification of risk levels and protection guidance.
Patent Information
- Application Number
- CN202510003792.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-01-02
- Publication Date
- 2025-09-16
AI Technical Summary
Existing technologies make it difficult to accurately assess the flooding and power outage risk levels of each underground distribution room, resulting in the inability to effectively identify low-, medium-, and high-risk distribution rooms and carry out corresponding protection or relocation and transformation.
By determining the rainfall sequence in the analyzed area, using the geographic model to simulate rainfall inundation, calculating the depth and duration of water accumulation at the channel mouth, and combining the weights to evaluate the inundation risk level, the power outage risk level is determined, and the risk level of the power supply service area is marked on the map.
It achieves accurate risk assessment of underground distribution rooms, provides guidance on whether they need to be moved to the ground or take protective measures, and improves the protection capabilities of underground distribution rooms in heavy rain environments.
Smart Images
Figure CN120655076A_ABST
Abstract
Claims
1. A method for assessing the risk of power outages caused by waterlogging in underground distribution rooms, characterized in that: The steps include: Step A: Determine the rainfall time series corresponding to the rainfall amount X within the preset time length H of the Y-year return period in the analyzed area; where Y ≥ 10; Step B: Based on the geographic model of the analyzed area, a rainfall inundation simulation is performed using the rainfall time series corresponding to the rainfall amount X as input. The time-varying water depth at the entrance of each underground garage within the analyzed area that meets the first condition is obtained. If the underground garage is an underground garage with an existing underground power distribution room, or an underground garage with a power distribution room to be constructed, then the underground garage meets the first condition. The entrance of the underground garage includes the entrance and exit of the underground garage. Step C: Determine the corresponding duration of the channel entrance location within each preset water depth range based on the change of the water depth at the channel entrance location over time, determine the flooding risk level of the channel entrance location based on the weight and corresponding duration corresponding to each preset water depth range, and determine the power outage risk level of the power supply service area corresponding to the underground distribution room of the corresponding underground garage when an underground distribution room is built based on the flooding risk level of the channel entrance location.
2. The method for assessing the risk of power outage caused by waterlogging in underground power distribution rooms according to claim 1, characterized in that: The step A specifically includes: Step A1: Collect the maximum rainfall in each year within a set year range in the history of the analyzed area within a preset time length H; where I is the number of years in the set year range; Step A2: Calculate the rainfall X using the maximum rainfall within a preset time length H in each year within the set year range and the extreme value distribution model; Step A3: using the rainfall amount X to determine the corresponding rainfall time series; Preferably, the extreme value distribution model is a Gumbel extreme value distribution model; Preferably, I≥30.
3. The method for assessing the risk of power outage caused by waterlogging in underground power distribution rooms according to claim 2, characterized in that: The step A2 is specifically as follows: The rainfall X is calculated using the following formula: Among them, α is the location parameter and β is the scale parameter; α and β are calculated using the following formula: Among them, x i is the maximum rainfall within the preset time length H corresponding to the i-th year within the set year range; where d{ln{·}} / dα represents the partial derivative of α with respect to ln{·}, and d{ln{·}} / dβ represents the partial derivative of β with respect to ln{·}.
4. The method for assessing the risk of power outage caused by waterlogging in underground power distribution rooms according to claim 2, characterized in that: Step A3 includes step A31 and step A32A performed in sequence, or includes step A31 and step A32B performed in sequence; in: Step A31 is: determining the value closest to the rainfall X among the maximum rainfall within the preset time length H in each year within the set year range; Step A32A is: using the rainfall amount X and the distribution ratio of the value closest to the rainfall amount X at each unit time HU in the preset time length H to obtain a rainfall time series corresponding to the rainfall amount X; Step A32B is as follows: using the rainfall amount X, the total length HT of the time period in which the values closest to the rainfall amount X are distributed, and the distribution ratio of the unit time HU of the values closest to the rainfall amount X within the distributed time period, a rainfall time series corresponding to the rainfall amount X is obtained; wherein the time length corresponding to the rainfall time series is equal to the total length HT of the distributed time period; wherein HT = Floor(HTR), HTR is the actual time length of the time period in which the values closest to the rainfall amount X are distributed, and Floor(HTR) represents HTR rounded up; the units of HTR and HT are both hours; HT is an integer multiple of HU, and HT ≥ 2×HU; Preferably, the preset time length H is the time length defined from 0:00 to 24:00 of a day, or the preset time length H is any H hours in a day, H≥1; more preferably, the value range of H is 3 hours to 6 hours; Preferably, the unit time HU is 0.5 hour or 1 hour.
5. The method for assessing the risk of waterlogging and power outage in underground power distribution rooms according to any one of claims 1 to 4, characterized in that: In step C, the flooding risk level of the channel mouth is determined according to the weights and durations corresponding to the preset water depth ranges. The calculation of R m,n_m The value of R m,n_m The value of determines the flooding risk level at the channel mouth location; in, R m,n_m W represents the calculation result of the comprehensive flooding risk value of the n_mth passageway of the mth underground garage that meets the first condition in the analyzed area. p is the weight corresponding to the pth preset water depth range, T m,n_m,p is the duration of submergence of the n_mth access opening of the mth underground garage meeting the first condition in the analyzed area within the pth preset water depth range, 1≤m≤M, 1≤n_m≤N_m, 1≤p≤P, M is the number of underground garages meeting the first condition in the analyzed area, N_m is the number of access openings of the mth underground garage meeting the first condition, and P is the number of preset water depth ranges; Preferably, P=4; the first, second, third, and fourth preset water depth ranges are respectively water depth < 0.1 m, 0.1 m ≤ water depth < 0.4 m, 0.4 m ≤ water depth ≤ 0.7 m, and water depth > 0.7 m; W1=0, W2=0.4, W3=0.8, and W4=1.6; Preferably, when R m,n_m The value ranges are R m,n_m <2, 2≤R m,n_m ≤4, R m,n_m When it is greater than 4, the flooding risk levels correspond to low risk, medium risk, and high risk respectively; Preferably, the steps B and C also include: Step B1: for underground garages that meet the second condition, the power outage risk level is low risk; for underground garages that do not meet the second condition, step C is executed; wherein, if the depth of accumulated water at all passage openings of the underground garage that changes with time does not exceed the first depth, then the underground garage meets the second condition, and the value of the first depth is 0.1 meter.
6. The method for assessing the risk of waterlogging and power outage in underground power distribution rooms according to any one of claims 1 to 4, characterized in that: In step C, the specific steps of determining the power outage risk level of the corresponding underground garage when an underground power distribution room is constructed according to the flooding risk level of the passage entrance are as follows: When there is an access opening in the underground garage, the flooding risk level at the access opening shall be used as the corresponding power outage risk level; When an underground garage has at least two access openings, the highest flooding risk level among the access openings corresponding to the underground garage is used as the corresponding power outage risk level.
7. The method for assessing the risk of waterlogging and power outage in underground power distribution rooms according to any one of claims 1 to 4, characterized in that: Y≥30。 8. A system for assessing the risk of power outages caused by waterlogging in underground power distribution rooms, characterized in that: The invention comprises a processor, wherein the processor is used to execute the steps of the power outage risk assessment method according to any one of claims 1 to 7.
9. A method for drawing a risk map of waterlogging and power outage in underground power distribution rooms, characterized in that: include: Execute the steps of the power outage risk assessment method according to any one of claims 1 to 7; After step C, the following steps are also included: Step D: Marking the power outage risk level of each power supply service area on the electronic map of the analyzed area, thereby obtaining a power outage risk map; Preferably, on an electronic map of the analyzed area: If two power supply service areas have the same power outage risk level, the two power supply service areas will be marked with the same color, or symbols of the same color will be marked on the two power supply service areas; If two power supply service areas have different power outage risk levels, the two power supply service areas are marked with different colors, or symbols of different colors are marked on the two power supply service areas; More preferably, the low-risk power supply service areas are marked in green or retain their original color, the medium-risk power supply service areas are marked in yellow, and the high-risk power supply service areas are marked in red.
10. A system for mapping the risk of waterlogging and power outages in underground power distribution rooms, characterized in that: The method comprises a processor configured to execute the steps of the power outage risk map drawing method according to claim 9.