Parameterization design method and system for transformer substation accident oil pool

Abstract

The invention belongs to the technical field of transformer substation accident oil pools, and particularly relates to a parameterization design method and system for a transformer substation accident oil pool. The method comprises the steps that an accident oil pool model is built, and an oil inlet and a water outlet are formed in the two ends of the accident oil pool in the length direction respectively; obtaining the transformer oil volume corresponding to the transformer with the maximum capacity of the transformer substation, and designing the volume of an accident oil pool according to the volume; calculating the height, the estimated length and the estimated cross sectional area of the accident oil pool; a plurality of partition plate units are arranged in the accident oil pool at intervals in the length direction, movable parts are arranged at the two ends of each partition plate unit in the height direction, and the distance between the partition plate units and the extension length of the movable parts are adjusted according to the size of an oil inlet and the flow speed of a medium containing transformer oil fed into the oil inlet; and outputting the finally designed accident oil pool model. The method is suitable for parameterization design of transformer substation accident oil pools of different specifications, and the oil-water separation effect is good.

Description

Technical Field

[0001] The invention belongs to the technical field of substation accident oil pools, and in particular relates to a parameterized design method and system for a substation accident oil pool. Background Art

[0002] Oil-immersed transformers are widely used in substations, and they rely on transformer oil as a cooling medium. After long-term operation, oil-immersed transformers will leak or even spray oil as the sealing equipment fails, which will not only cause environmental pollution, but also easily cause fires. Transformer oil contains toxic components such as polycyclic aromatic hydrocarbons, benzene and heavy metals. Direct discharge will seriously pollute the soil and water, and must be reliably collected and harmlessly treated. The substation accident oil pool is a special equipment for collecting and storing transformer oil when it leaks. The structural design of the accident oil pool is very important for the oil storage effect. The accident oil pool relies on gravity sedimentation to separate layers, so that transformer oil and water of different densities are separated and the water is discharged, which can reliably store transformer oil. After the stored transformer oil is recovered, the accident oil pool can be used again.

[0003] In order to improve the stratification effect of the oil-water mixture sent into the accident oil pool and reduce the possibility of environmental pollution, a parametric design method for the substation accident oil pool is proposed to improve the separation effect of transformer oil and water, which is suitable for transformers of different specifications and is very necessary. Summary of the invention

[0004] The purpose of the present invention is to address the above-mentioned problems existing in the prior art and to provide a method and system for parameterizing the dimensions of key components of an accident oil pool to improve the separation effect of transformer oil and water, and the method and system are suitable for parameterizing the accident oil pool of transformer substations of different specifications.

[0005] To achieve the above objectives, the technical solution of the present invention is as follows:

[0006] In a first aspect, the present invention provides a parametric design method for a substation accident oil pool, the parametric design method comprising the following steps:

[0007] S1. Construct an accident oil pool model; the accident oil pool model is a rectangular structure, one end extending along the length direction of the accident oil pool is provided with an oil inlet, and the other end extending along the length direction of the accident oil pool is provided with a water outlet, the height of the oil inlet is greater than the height of the water outlet, and the oil inlet is connected to the oil tank below the transformer through a pipeline;

[0008] S2. Obtain the transformer oil volume corresponding to the transformer with the maximum capacity of the substation, and design the volume of the accident oil pool model according to the transformer oil volume;

[0009] S3. obtaining an estimated height, an estimated length, and an estimated cross-sectional area of ​​the accident oil pool model based on the volume of the accident oil pool model;

[0010] S4. A plurality of baffle units are arranged inside the accident oil pool model; the plurality of baffle units are arranged at intervals along the length direction of the accident oil pool model, and movable parts are arranged at both ends of the height extension direction of the plurality of baffle units, and the movable parts are arranged to be telescopic relative to the baffle units;

[0011] S5. According to the size of the oil inlet and the flow rate of the medium containing transformer oil fed into the oil inlet, the spacing between the plurality of baffle units and the extension length of the movable parts of the plurality of baffle units are calculated, and the final accident oil pool model is output.

[0012] A first boss and a second boss are arranged at the bottom of the accident oil pool model, and the first boss and the second boss are respectively arranged at two ends of the accident oil pool model along the length direction of the accident oil pool model, and the second boss is connected with the interior of the accident oil pool model; a water supply port is also arranged at one end of the accident oil pool extending along its length direction, and the height of the water outlet is greater than the height of the water supply port, and the water supply port is connected with a water source through a pipeline.

[0013] The S3 comprises the following steps:

[0014] S31. Calculate the average oil droplet diameter d of transformer oil avg :

[0015]

[0016] In the above formula, d i is the diameter of the i-th oil droplet, n is the total number of oil droplet types; p i is the percentage of the number of the ith oil droplets to the total number of oil droplets;

[0017] According to the average oil droplet diameter d avg Calculate the estimated height H of the accident oil pool model:

[0018]

[0019] In the above formula, d max is the maximum oil droplet diameter; It is the rounding operation;

[0020] S32, according to the average oil droplet diameter d avg Calculate the rising velocity v of the oil drop in the accident oil pool model h :

[0021]

[0022] ρ oil (T) = ρ oil(T ref )[1-β(TT ref );

[0023]

[0024] In the above formula, ρw ate . is the density of water; g is the acceleration due to gravity; ρ oil (T) is the function of oil drop density with respect to temperature; β is the volume expansion coefficient of the oil drop; T is the current temperature of the oil drop; T ref is the reference temperature; oil (T ref ) is the density of the oil droplet at the reference temperature; μ(T) is the function of the oil droplet viscosity with respect to temperature; μ(T ref ) is the oil drop viscosity at the reference temperature; E a is the activation energy; R is the gas constant;

[0025] S33. Calculate the initial velocity v of the horizontal motion of the transformer oil droplets v :

[0026]

[0027] In the above formula, V oil is the transformer oil volume of the transformer with the largest capacity in the substation; α is the volume adjustment coefficient; D is the diameter of the oil inlet;

[0028] S34. Calculate the estimated cross-sectional area S of the accident oil pool model:

[0029]

[0030] In the above formula, V c is the volume of the accident oil pool model; H is the estimated height of the accident oil pool model; W is the theoretical width of the accident oil pool model; L is the estimated length of the accident oil pool model, and the estimated length L satisfies L≥W.

[0031] The S5 includes:

[0032] S51, setting the accident oil pool model to have a first end face and a second end face that are oppositely arranged in the width direction, and the actual length of the accident oil pool model is L0, and the actual width is W0;

[0033] S52. A first baffle unit, a second baffle unit, and a third baffle unit are sequentially arranged along the length direction in the accident oil pool model, wherein the first baffle unit is arranged inside the accident oil pool model near one end of the oil inlet, and the two ends of the first baffle unit in the horizontal extension direction are respectively abutted against the first end face and the second end face, a horizontal distance between the first baffle unit and the end face where the oil inlet of the accident oil pool model is located is L1, a first window is formed between the upper surface of the first baffle unit and the inner surface of the accident oil pool model, and the height of the first window is H1, a second window is formed between the lower surface of the first baffle unit and the inner surface of the accident oil pool model, and the height of the second window is H2, a movable portion of the first baffle extends out along the vertical direction to adjust the height H1 of the first window or the height H2 of the second window; a spacing between the second baffle unit and the first baffle unit is L2, one end of the second baffle unit is fixedly connected to the first end face, and the other end thereof is extended toward the second end face, a horizontal spacing between the second baffle and the second end face is W1, and a second A third window is formed between the upper surface of the baffle unit and the inner surface of the accident oil pool model, and the height of the third window is H3; a fourth window is formed between the lower surface of the second baffle unit and the inner surface of the accident oil pool model, and the height of the fourth window is H4; the movable part of the second baffle unit extends in the vertical direction to adjust the height H3 of the third window or the height H4 of the fourth window; the distance between the third baffle unit and the second baffle unit is L3, one end of the third baffle unit is fixed to the second end face, and the other end thereof is extended toward the first end face, and the horizontal distance between the third baffle unit and the first end face is W2; a fifth window is formed between the upper surface of the third baffle unit and the inner surface of the accident oil pool model, and the height of the fifth window is H5; a sixth window is formed between the lower surface of the third baffle unit and the inner surface of the accident oil pool model, and the height of the sixth window is H6; the movable part of the third baffle unit extends in the vertical direction to adjust the height H5 of the fifth window or the height H6 of the sixth window;

[0034] S53, the height of the first window H1=0.5D, and the height relationship between the first window, the fifth window and the third window satisfies H1≥H5≥H3; the height of the second window H2=D, and the height relationship between the second window, the sixth window and the fourth window satisfies H2>H4>H6;

[0035] S54, the size of the first baffle unit along the width direction of the accident oil pool model is W0, and the sizes of the second baffle unit and the third baffle unit along the width direction of the accident oil pool model are equal, and the value range is [85% W0, 90% W0];

[0036] S55. The total distance of horizontal movement of the oil droplets in the accident oil pool model is not less than the estimated length L of the accident oil pool model.

[0037] The horizontal distance L1 between the first baffle unit and the end surface of the oil inlet of the accident oil pool model is calculated according to the following formula:

[0038]

[0039] In the above formula, v v represents the initial velocity of the horizontal movement of the transformer oil droplet corresponding to the oil inlet diameter D; v vmax v v The maximum value of .

[0040] In a second aspect, the present invention provides a parametric design system for a substation accident oil pool, the parametric design system comprising an accident oil pool model construction module, an accident oil pool model volume acquisition module, a model parameter estimation module, a partition unit configuration module, a partition unit parameter estimation module, and a model output module;

[0041] The accident oil pool model construction module is used to construct the accident oil pool model; the accident oil pool model is a rectangular structure, one end extending along the length direction thereof is provided with an oil inlet, and the other end extending along the length direction thereof is provided with a water outlet, the height of the oil inlet is greater than the height of the water outlet, and the oil inlet is connected to the oil tank below the transformer through a pipeline;

[0042] The accident oil pool model volume acquisition module is used to acquire the transformer oil volume corresponding to the transformer with the maximum capacity of the substation, and design the volume of the accident oil pool model according to the transformer oil volume;

[0043] The model parameter estimation module is used to obtain the estimated height, estimated length and estimated cross-sectional area of ​​the accident oil pool model based on the volume of the accident oil pool model;

[0044] The partition unit configuration module is used to configure a plurality of partition units inside the accident oil pool model; the plurality of partition units are arranged at intervals along the length direction of the accident oil pool model, and both ends of the plurality of partition units in the height extension direction are provided with movable parts, and the movable parts are telescopically arranged relative to the partition units;

[0045] The partition unit parameter estimation module is used to calculate the spacing between the partition units and the extension length of the movable parts of the partition units according to the size of the oil inlet and the flow rate of the medium containing transformer oil fed into the oil inlet;

[0046] The model output module is used to output the final accident oil pool model.

[0047] A first boss and a second boss are arranged at the bottom of the accident oil pool model, and the first boss and the second boss are respectively arranged at two ends of the accident oil pool model along the length direction of the accident oil pool model, and the second boss is connected with the interior of the accident oil pool model; a water supply port is also arranged at one end of the accident oil pool extending along its length direction, and the height of the water outlet is greater than the height of the water supply port, and the water supply port is connected with a water source through a pipeline.

[0048] The model parameter estimation module obtains the estimated height, estimated length and estimated cross-sectional area of ​​the accident oil pool model through the following steps:

[0049] S31. Calculate the average oil droplet diameter d of transformer oil avg :

[0050]

[0051] In the above formula, d i is the diameter of the i-th oil droplet, n is the total number of oil droplet types; p i is the percentage of the number of the ith oil droplets to the total number of oil droplets;

[0052] According to the average oil droplet diameter d avg Calculate the estimated height H of the accident oil pool model:

[0053]

[0054] In the above formula, d max is the maximum oil droplet diameter; It is the rounding operation;

[0055] S32, according to the average oil droplet diameter d avg Calculate the rising velocity v of the oil drop in the accident oil pool model h :

[0056]

[0057] ρ oil (T) = ρ oil (T ref )[1-β(TT ref );

[0058]

[0059] In the above formula, ρ water is the density of water; g is the acceleration due to gravity; ρ oil (T) is the function of oil drop density with respect to temperature; β is the volume expansion coefficient of the oil drop; T is the current temperature of the oil drop; T ref is the reference temperature; oil (T ref) is the density of the oil droplet at the reference temperature; μ(T) is the function of the oil droplet viscosity with respect to temperature; μ(T ref ) is the oil drop viscosity at the reference temperature; E a is the activation energy; R is the gas constant;

[0060] S33. Calculate the initial velocity v of the horizontal motion of the transformer oil droplets v :

[0061]

[0062] In the above formula, V oil is the transformer oil volume of the transformer with the largest capacity in the substation; α is the volume adjustment coefficient; D is the diameter of the oil inlet 1;

[0063] S34. Calculate the estimated cross-sectional area S of the accident oil pool model:

[0064]

[0065] In the above formula, V c is the volume of the accident oil pool model; H is the estimated height of the accident oil pool model; W is the theoretical width of the accident oil pool model; L is the estimated length of the accident oil pool model, and the estimated length L satisfies

[0066] The partition unit parameter estimation module calculates the spacing between the partition units and the extension lengths of the movable parts of the partition units according to the following steps:

[0067] S51, setting the accident oil pool model to have a first end face and a second end face that are oppositely arranged in the width direction, and the actual length of the accident oil pool model is L0, and the actual width is W0;

[0068] S52. A first baffle unit, a second baffle unit, and a third baffle unit are sequentially arranged along the length direction in the accident oil pool model, wherein the first baffle unit is arranged inside the accident oil pool model near one end of the oil inlet, and the two ends of the first baffle unit in the horizontal extension direction are respectively abutted against the first end face and the second end face, a horizontal distance between the first baffle unit and the end face where the oil inlet of the accident oil pool model is located is L1, a first window is formed between the upper surface of the first baffle unit and the inner surface of the accident oil pool model, and the height of the first window is H1, a second window is formed between the lower surface of the first baffle unit and the inner surface of the accident oil pool model, and the height of the second window is H2, a movable portion of the first baffle extends out along the vertical direction to adjust the height H1 of the first window or the height H2 of the second window; a spacing between the second baffle unit and the first baffle unit is L2, one end of the second baffle unit is fixedly connected to the first end face, and the other end thereof is extended toward the second end face, a horizontal spacing between the second baffle and the second end face is W1, and a second A third window is formed between the upper surface of the baffle unit and the inner surface of the accident oil pool model, and the height of the third window is H3; a fourth window is formed between the lower surface of the second baffle unit and the inner surface of the accident oil pool model, and the height of the fourth window is H4; the movable part of the second baffle unit extends in the vertical direction to adjust the height H3 of the third window or the height H4 of the fourth window; the distance between the third baffle unit and the second baffle unit is L3, one end of the third baffle unit is fixed to the second end face, and the other end thereof is extended toward the first end face, and the horizontal distance between the third baffle unit and the first end face is W2; a fifth window is formed between the upper surface of the third baffle unit and the inner surface of the accident oil pool model, and the height of the fifth window is H5; a sixth window is formed between the lower surface of the third baffle unit and the inner surface of the accident oil pool model, and the height of the sixth window is H6; the movable part of the third baffle unit extends in the vertical direction to adjust the height H5 of the fifth window or the height H6 of the sixth window;

[0069] S53, the height of the first window H1=0.5D, and the height relationship between the first window, the fifth window and the third window satisfies H1≥H5≥H3; the height of the second window H2=D, and the height relationship between the second window, the sixth window and the fourth window satisfies H2>H4>H6;

[0070] S54, the size of the first baffle unit along the width direction of the accident oil pool model is W0, and the sizes of the second baffle unit and the third baffle unit along the width direction of the accident oil pool model are equal, and the value range is [85% W0, 90% W0];

[0071] S55. The total distance of horizontal movement of the oil droplets in the accident oil pool model is not less than the estimated length L of the accident oil pool model.

[0072] The horizontal distance L1 between the first baffle unit and the end surface of the oil inlet of the accident oil pool model is calculated according to the following formula:

[0073]

[0074] In the above formula, v v represents the initial velocity of the horizontal movement of the transformer oil droplet corresponding to the oil inlet diameter D; v vmax v v The maximum value of .

[0075] Compared with the prior art, the present invention has the following beneficial effects:

[0076] The present invention performs parameterized modeling on the accident oil pool, gives a constraint relationship, obtains the theoretical volume of the accident oil pool model, then estimates the height of the accident oil pool model according to the average particle size distribution of oil droplets, and then estimates the estimated length and theoretical width of the accident oil pool model according to the floating speed and initial horizontal movement speed of the oil droplets in the accident oil pool model; finally, by planning the position of each baffle unit inside the accident oil pool model, and further adjusting the height of the window formed by the baffle unit and the inner surface of the accident oil pool, the moving path and the number of collisions of the mixture of oil droplets and water are changed, which is beneficial to the reduction of the volume of the oil droplets after multiple collisions, and improves the oil-water separation effect, and reduces the possibility of pollutants being discharged with water. BRIEF DESCRIPTION OF THE DRAWINGS

[0077] Figure 1 The figure is a flow chart of the parametric design method of the present invention.

[0078] Figure 2 It is a structural schematic diagram of the accident oil pool model in the present invention.

[0079] Figure 3 It is a top view of the accident oil pool model in the present invention.

[0080] Figure 4 It is a schematic structural diagram of the first baffle unit in the present invention.

[0081] Figure 5 It is a schematic structural diagram of the second baffle unit in the present invention.

[0082] Figure 6 It is a schematic structural diagram of the third baffle unit in the present invention.

[0083] Figure 7 It is a structural schematic diagram of the parametric design system of the present invention.

[0084] In the above figure, 1, oil inlet; 2, water outlet; 11, first boss; 12, second boss; 13, water supply port; 14, first end face; 15, second end face; 100, first baffle unit; 200, second baffle unit; 300, third baffle unit. DETAILED DESCRIPTION

[0085] The following will be combined with the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0086] Embodiment 1:

[0087] At present, when oil-immersed transformers leak or spray oil, it is necessary to recover the transformer oil in time to avoid environmental pollution or fire caused by transformer oil leakage. It is necessary to simplify the design process of the accident oil pool, improve the versatility of the accident oil pool design process, and improve the stratification effect of the accident oil pool on the oil-water mixture. In view of this, if Figure 1 As shown, this embodiment provides a parameterized design method for a substation accident oil pool, and the parameterized design method is performed in the following steps:

[0088] S1. Construction Figure 2 , Figure 3 The accident oil pool model shown in the figure is a rectangular structure, one end of which is provided with an oil inlet 1 and the other end of which is provided with a water outlet 2. The height of the oil inlet 1 is greater than the height of the water outlet 2. The oil inlet 1 is connected to the oil tank below the transformer through a pipeline.

[0089] In order to improve the position stability of the accident oil pool in the preset foundation pit, a first boss 11 and a second boss 12 are provided at the bottom of the accident oil pool model, and the first boss 11 and the second boss 12 are respectively provided at the two ends of the accident oil pool model along the length direction of the accident oil pool model; the second boss 12 is connected to the interior of the accident oil pool model, which can increase the height of the oil-water stratification interface at the end of the pipeline corresponding to the water outlet 2, thereby improving the oil-water separation effect; the accident oil pool is also provided with a water replenishment port 13 at one end extending along its length direction, the height of the water outlet 2 is greater than the height of the water replenishment port 13, and the water replenishment port 13 is connected to the water source through a pipeline; usually a certain amount of water needs to be stored in the accident oil pool, which is mainly supplemented by precipitation. If the water level in the accident oil pool is low, the water replenishment port 13 can be opened for active water replenishment until the water replenishment height reaches the lower edge of the water outlet 2;

[0090] The accident oil pool is buried underground with a burial depth of not less than 1 meter. A manhole and an exhaust hole are provided on the accident oil pool model, and the manhole and the exhaust hole are connected with the inside of the accident oil pool. The manhole is provided for the convenience of personnel entering the accident oil pool for maintenance and overhaul, and the exhaust hole is provided for the convenience of discharging harmful gases in the accident oil pool, so as to avoid the accumulation of dangerous gases inside the accident oil pool and cause safety accidents.

[0091] S2. Obtain the volume of transformer oil corresponding to the transformer with the maximum capacity of the substation, and design the volume of the accident oil pool model according to the volume of the transformer oil; specifically, the volume of the accident oil pool is 1.3-1.5 times the volume of the transformer oil corresponding to the transformer with the maximum capacity of the substation; when the transformer oil used in the transformer is usually leaking, in order to cool the transformer, it may be necessary to assist in opening fire-fighting measures. The medium fed into the oil inlet 1 may be transformer oil or a mixture of transformer oil and water. Therefore, a certain margin needs to be reserved to avoid the mixture of transformer oil and water from flowing in quickly, resulting in incomplete stratification, which makes the water quality of the water outlet deteriorate, and eliminates the risk of environmental pollution;

[0092] S3. Obtain the estimated height, estimated length and estimated cross-sectional area of ​​the accident oil pool model through the following steps:

[0093] S31, determine the oil droplet size distribution of transformer oil, and calculate the average oil droplet diameter d of transformer oil avg :

[0094]

[0095] In the above formula, d i is the diameter of the i-th oil droplet, n is the total number of oil droplet types; p i is the percentage of the number of the ith oil droplets to the total number of oil droplets;

[0096] According to the average oil droplet diameter d avg Calculate the estimated height H of the accident oil pool model:

[0097]

[0098] In the above formula, d max is the maximum oil droplet diameter; is a round-up operation; in this embodiment, d max The value range of is [100, 1300] microns; the value range of the estimated height H is [2, 4] meters;

[0099] S32, due to the average oil droplet diameter d avg Determines the initial movement state of transformer oil entering the accident oil pool, that is, the floating speed, so according to the average oil droplet diameter d avg Calculate the rising velocity v of the oil drop in the accident oil pool model h :

[0100]

[0101] ρ oil (T) = ρ oil (T ref )[1-β(TT ref );

[0102]

[0103] In the above formula, ρ water is the density of water; g is the acceleration due to gravity; ρ oil (T) is the function of oil drop density with respect to temperature; β is the volume expansion coefficient of the oil drop; T is the current temperature of the oil drop; T ref is the reference temperature; oil (T ref ) is the density of the oil droplet at the reference temperature; μ(T) is the function of the oil droplet viscosity with respect to temperature; μ(T ref ) is the oil drop viscosity at the reference temperature; E a is the activation energy; R is the gas constant;

[0104] Since the purpose of transformer oil is to cool the transformer, the current temperature T of the oil droplet can be obtained by looking up the table. The value range is [35℃, 75℃]. T affects the density and viscosity of the oil droplet. The higher the T, the lower the density of the oil droplet, thereby increasing the floating speed of the oil droplet. The viscosity of the oil droplet decreases with the increase of temperature, which also increases the floating speed of the oil droplet. Therefore, the effect of temperature on the oil droplet must be considered. For example, the reference temperature T ref The value is 26℃;

[0105] S33. Calculate the initial velocity v of the horizontal motion of the transformer oil droplets v :

[0106]

[0107] In the above formula, V oil is the transformer oil volume of the transformer with the maximum capacity of the substation; D is the diameter of the oil inlet 1, and for example, the value range of D is [0.2, 0.4]; 1200 represents the number of seconds corresponding to 20 minutes; is the cross-sectional area of ​​the oil inlet 1; α is the volume adjustment coefficient, α∈[1,1.5]; if only transformer oil is fed into the oil inlet, the value of the volume adjustment coefficient is 1; if a mixture of transformer oil and water is fed into the oil inlet, the volume adjustment coefficient is appropriately adjusted according to the proportion of water in the medium;

[0108] S34. Calculate the estimated cross-sectional area S of the accident oil pool model:

[0109]

[0110] In the above formula, V c is the volume of the accident oil pool model; H is the estimated height of the accident oil pool model; W is the theoretical width of the accident oil pool model; L is the estimated length of the accident oil pool model, and the estimated length L satisfies

[0111] S4. A plurality of baffle units are arranged inside the accident oil pool model; the plurality of baffle units are arranged at intervals along the length direction of the accident oil pool model, and movable parts are arranged at both ends of the height extension direction of the plurality of baffle units, and the movable parts are arranged to be telescopic relative to the baffle units;

[0112] S5. Setting a suitable distance between the first baffle unit 100 and the oil inlet 1 can make the oil droplets collide with the surface of the first baffle unit 100 as much as possible, which is conducive to the breakage and stratification of large-diameter oil droplets; if the flow rate of the oil inlet 1 is fixed, as the diameter of the oil inlet 1 changes, the initial velocity v of the horizontal movement of the oil droplets v It will gradually become smaller. In order to adapt to different initial velocities of horizontal movement of oil droplets, the spacing between the first baffle unit 100, the second baffle unit 200 and the third baffle unit 300 in the length direction of the accident oil pool can be adjusted, such as fine-tuning the position of each baffle unit in the accident oil pool through a linear adjustment mechanism; therefore, it is necessary to calculate the spacing between several baffle units and the extension length of the movable parts of several baffle units according to the size of the oil inlet 1 and the flow rate of the medium containing transformer oil fed into the oil inlet 1; the specific steps are as follows:

[0113] S41. Under the premise that the volume of the accident oil pool model remains unchanged, for the purpose of saving land, the estimated length L and the theoretical width W are fine-tuned to determine that the actual length of the accident oil pool model is L0 and the actual width is W0; the accident oil pool model is set to have a first end face 14 and a second end face 15 that are arranged opposite to each other in the width direction;

[0114] S42, such as Figures 4 to 6 As shown, the first baffle unit 100, the second baffle unit 200, and the third baffle unit 300 are sequentially arranged along the length direction in the accident oil pool model. The first baffle unit 100 is arranged at one end of the accident oil pool model near the oil inlet 1, and the two ends of the first baffle unit 100 in the horizontal extension direction are respectively abutted against the first end face 14 and the second end face 15. The horizontal distance between the first baffle unit 100 and the end face where the oil inlet 1 of the accident oil pool model is located is L1, and L1 is calculated according to the following formula:

[0115]

[0116] In the above formula, v vrepresents the initial velocity of the horizontal movement of the transformer oil droplet corresponding to the diameter D of the oil inlet 1; v vmax v v The maximum value of

[0117] A first window is formed between the upper surface of the first baffle unit 100 and the inner surface of the accident oil pool model, and the height of the first window is H1; a second window is formed between the lower surface of the first baffle unit 100 and the inner surface of the accident oil pool model, and the height of the second window is H2; the movable portion of the first baffle extends in the vertical direction to adjust the height H1 of the first window or the height H2 of the second window; the second baffle unit 200 is spaced apart from the first baffle unit 100 by L2, one end of the second baffle unit 200 is fixedly connected to the first end face 14, and the other end thereof is extended toward the second end face 15, and the horizontal distance between the second baffle and the second end face 15 is W1; a third window is formed between the upper surface of the second baffle unit 200 and the inner surface of the accident oil pool model, and the height of the third window is H3; A fourth window is formed between the upper surface of the third baffle unit 300 and the inner surface of the accident oil pool model, and the height of the fourth window is H4. The movable part of the second baffle unit 200 extends along the vertical direction to adjust the height H3 of the third window or the height H4 of the fourth window; the distance between the third baffle unit and the second baffle unit 200 is L3, one end of the third baffle unit 300 is fixedly arranged with the second end face 15, and the other end thereof is extended toward the first end face 14. The horizontal distance between the third baffle unit 300 and the first end face 14 is W2, a fifth window is formed between the upper surface of the third baffle unit 300 and the inner surface of the accident oil pool model, and the height of the fifth window is H5. A sixth window is formed between the lower surface of the third baffle unit 300 and the inner surface of the accident oil pool model, and the height of the sixth window is H6. The movable part of the third baffle unit 300 extends along the vertical direction to adjust the height H5 of the fifth window or the height H6 of the sixth window;

[0118] S43, the height of the first window H1=0.5D, and the height relationship between the first window, the fifth window and the third window satisfies H1≥H5≥H3; the height of the second window H2=D, and the height relationship between the second window, the sixth window and the fourth window satisfies H2>H4>H6;

[0119] S44, the size of the first baffle unit 100 along the width direction of the accident oil pool model is W0, and the sizes of the second baffle unit 200 and the third baffle unit 300 along the width direction of the accident oil pool model are equal, both being [85% W0, 90% W0];

[0120] S45. The total distance of horizontal movement of the oil droplets in the accident oil pool model is not less than the estimated length L of the accident oil pool model;

[0121] Specifically, the thickness of the first baffle unit 100, the second baffle unit 200 and the third baffle unit 300 are all ≥ 0.05H; the spacing L3 between the third baffle unit and the second baffle unit is ≥ 0.4H; the spacing L3 between the second baffle unit and the first baffle unit is equal to the spacing L3 between the third baffle unit and the second baffle unit; the equal spacing here means that the center distance is equal;

[0122] Specifically, the second baffle unit 200 and the third baffle unit 300 can be set to have a certain inclination angle with the first end face 14 of the accident oil pool model. Of course, the second baffle unit 200 can also be set to be perpendicular to the first end face 14, and the third baffle unit 300 can be perpendicular to the second end face. The purpose is to extend the retention time of oil droplets in the horizontal direction of the accident oil pool as much as possible through the first baffle unit 100, the second baffle unit 200 and the third baffle unit 300, so as to fully meet the time requirement for the oil droplets to float up.

[0123] S6. Output the final accident oil pool model.

[0124] Embodiment 2:

[0125] See also Figure 7 A parametric design system for an accident oil pool of a transformer substation, the parametric design system comprising an accident oil pool model construction module, an accident oil pool model volume acquisition module, a model parameter estimation module, a baffle unit configuration module, a baffle unit parameter estimation module, and a model output module; the accident oil pool model construction module is used to construct an accident oil pool model; the accident oil pool model is a rectangular structure, an oil inlet 1 is provided at one end extending along its length direction, and a water outlet 2 is provided at the other end extending along its length direction, the height of the oil inlet 1 is greater than the height of the water outlet 2, the oil inlet 1 is connected to the oil tank below the transformer through a pipeline, and a first boss 11 and a second boss 12 are provided at the bottom of the accident oil pool model, the first boss 11 and the second boss 12 are respectively arranged at the two ends of the accident oil pool model along the length direction of the accident oil pool model, and the second boss 12 is connected with the interior of the accident oil pool model; the accident oil pool is also provided with a water filling port 13 at one end extending along its length direction, the height of the water outlet 2 is greater than the height of the water filling port 13, and the water filling port 13 is connected with the water source through a pipeline; the accident oil pool model volume acquisition module is used to obtain the transformer oil volume corresponding to the transformer with the maximum capacity of the substation, and the volume of the accident oil pool model is designed according to the transformer oil volume; the model parameter estimation module is used to obtain the estimated height, estimated length and estimated cross-sectional area of ​​the accident oil pool model based on the volume of the accident oil pool model; specifically, the following steps are followed:

[0126] S31. Calculate the average oil droplet diameter d of transformer oil avg :

[0127]

[0128] In the above formula, d i is the diameter of the i-th oil droplet, n is the total number of oil droplet types; p i is the percentage of the number of the ith oil droplets to the total number of oil droplets;

[0129] According to the average oil droplet diameter d avg Calculate the estimated height H of the accident oil pool model:

[0130]

[0131] In the above formula, d max is the maximum oil droplet diameter; It is the rounding operation;

[0132] S32, according to the average oil droplet diameter d avg Calculate the rising velocity v of the oil drop in the accident oil pool model h :

[0133]

[0134] ρ oil (T) = ρ oil (T ef )[1-β(TT ref );

[0135]

[0136] In the above formula, ρ water is the density of water; g is the acceleration due to gravity; ρ oil (T) is the function of oil drop density with respect to temperature; β is the volume expansion coefficient of the oil drop; T is the current temperature of the oil drop; T ref is the reference temperature; oil (T ref ) is the density of the oil droplet at the reference temperature; μ(T) is the function of the oil droplet viscosity with respect to temperature; μ(T ref ) is the oil drop viscosity at the reference temperature; E a is the activation energy; R is the gas constant;

[0137] S33. Calculate the initial velocity v of the horizontal motion of the transformer oil droplets v :

[0138]

[0139] In the above formula, V oil is the transformer oil volume of the transformer with the largest capacity in the substation; α is the volume adjustment coefficient; D is the diameter of the oil inlet 1;

[0140] S34. Calculate the estimated cross-sectional area S of the accident oil pool model:

[0141]

[0142] In the above formula, V c is the volume of the accident oil pool model; H is the estimated height of the accident oil pool model; W is the theoretical width of the accident oil pool model; L is the estimated length of the accident oil pool model, and the estimated length L satisfies

[0143] The partition unit configuration module is used to configure a plurality of partition units inside the accident oil pool model; the plurality of partition units are arranged at intervals along the length direction of the accident oil pool model, and both ends of the plurality of partition units in the height extension direction are provided with movable parts, and the movable parts are telescopically arranged relative to the partition units;

[0144] The partition unit parameter estimation module is used to calculate the spacing between a plurality of partition units and the extension length of the movable parts of a plurality of partition units according to the size of the oil inlet 1 and the flow rate of the medium containing transformer oil fed into the oil inlet 1; specifically, the following steps are performed:

[0145] S51, the accident oil pool model has a first end face 14 and a second end face 15 arranged opposite to each other in the width direction, and the actual length of the accident oil pool model is L0, and the actual width is W0;

[0146] S52, sequentially arrange the first baffle unit 100, the second baffle unit 200, and the third baffle unit 300 along the length direction in the accident oil pool model, wherein the first baffle unit 100 is arranged at one end of the accident oil pool model near the oil inlet 1, and the two ends of the first baffle unit 100 in the horizontal extension direction are respectively abutted against the first end face 14 and the second end face 15, and the horizontal distance between the first baffle unit 100 and the end face where the oil inlet 1 of the accident oil pool model is located is L1, which is calculated according to the following formula:

[0147]

[0148] In the above formula, v v represents the initial velocity of the horizontal movement of the transformer oil droplet corresponding to the diameter D of the oil inlet 1; v vmax v v The maximum value of

[0149] A first window is formed between the upper surface of the first baffle unit 100 and the inner surface of the accident oil pool model, and the height of the first window is H1; a second window is formed between the lower surface of the first baffle unit 100 and the inner surface of the accident oil pool model, and the height of the second window is H2; the movable portion of the first baffle extends in the vertical direction to adjust the height H1 of the first window or the height H2 of the second window; the second baffle unit 200 is spaced apart from the first baffle unit 100 by L2, one end of the second baffle unit 200 is fixedly connected to the first end face 14, and the other end thereof is extended toward the second end face 15, and the horizontal distance between the second baffle and the second end face 15 is W1; a third window is formed between the upper surface of the second baffle unit 200 and the inner surface of the accident oil pool model, and the height of the third window is H3; A fourth window is formed, the height of the fourth window is H4, the movable portion of the second baffle unit 200 extends in the vertical direction to adjust the height HH3 of the third window or the height H4 of the fourth window; the distance between the third baffle unit and the second baffle unit 200 is L3, one end of the third baffle unit 300 is fixedly arranged with the second end face 15, and the other end thereof is extended toward the first end face 14, the horizontal distance between the third baffle unit 300 and the first end face 14 is W2, a fifth window is formed between the upper surface of the third baffle unit 300 and the inner surface of the accident oil pool model, the height of the fifth window is H5, a sixth window is formed between the lower surface of the third baffle unit 300 and the inner surface of the accident oil pool model, the height of the sixth window is H6, and the movable portion of the third baffle unit 300 extends in the vertical direction to adjust the height H5 of the fifth window or the height H6 of the sixth window;

[0150] S53, the height of the first window H1=0.5D, and the height relationship between the first window, the fifth window and the third window satisfies H1≥H5≥H3; the height of the second window H2=D, and the height relationship between the second window, the sixth window and the fourth window satisfies H2>H4>H6;

[0151] S54, the size of the first baffle unit 100 along the width direction of the accident oil pool model is W0, and the sizes of the second baffle unit 200 and the third baffle unit 300 along the width direction of the accident oil pool model are equal, both being [85% W0, 90% W0];

[0152] S55. The total distance of horizontal movement of the oil droplets in the accident oil pool model is not less than the estimated length L of the accident oil pool model;

[0153] The model output module is used to output the final accident oil pool model.

[0154] It should be noted that the present invention is described by taking a rectangular parallelepiped accident oil pool as an example, but it is also applicable to a cylindrical accident oil pool. The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A parametric design method for a substation accident oil pool, characterized in that: The parametric design method comprises the following steps: S1. Constructing an accident oil pool model; the accident oil pool model is a rectangular structure, one end extending in the length direction thereof is provided with an oil inlet (1), and the other end extending in the length direction thereof is provided with a water outlet (2), the height of the oil inlet (1) is greater than the height of the water outlet (2), and the oil inlet (1) is connected to the oil tank below the transformer through a pipeline; S2. Obtain the transformer oil volume corresponding to the transformer with the maximum capacity of the substation, and design the volume of the accident oil pool model according to the transformer oil volume; S3. obtaining an estimated height, an estimated length, and an estimated cross-sectional area of ​​the accident oil pool model based on the volume of the accident oil pool model; S4. A plurality of baffle units are arranged inside the accident oil pool model; the plurality of baffle units are arranged at intervals along the length direction of the accident oil pool model, and movable parts are arranged at both ends of the height extension direction of the plurality of baffle units, and the movable parts are arranged to be telescopic relative to the baffle units; S5. According to the size of the oil inlet (1) and the flow rate of the medium containing transformer oil fed into the oil inlet (1), the spacing between the plurality of baffle units and the extension length of the movable parts of the plurality of baffle units are calculated, and the final accident oil pool model is output.

2. A parametric design method for a substation accident oil pool according to claim 1, characterized in that: A first boss (11) and a second boss (12) are provided at the bottom of the accident oil pool model. The first boss (11) and the second boss (12) are respectively provided at two ends of the accident oil pool model along the length direction of the accident oil pool model, and the second boss (12) is connected to the interior of the accident oil pool model. A water supply port (13) is also provided at one end of the accident oil pool extending along the length direction thereof. The height of the water outlet (2) is greater than the height of the water supply port (13), and the water supply port (13) is connected to a water source through a pipeline.

3. The parametric design method for a substation accident oil pool according to claim 1 is characterized in that: The S3 comprises the following steps: S31. Calculate the average oil droplet diameter d of transformer oil avg : In the above formula, d i is the diameter of the i-th oil droplet, n is the total number of oil droplet types; p i is the percentage of the number of the ith oil droplets to the total number of oil droplets; According to the average oil droplet diameter d avg Calculate the estimated height H of the accident oil pool model: In the above formula, d max is the maximum oil droplet diameter; It is the rounding operation; S32, according to the average oil droplet diameter d avg Calculate the rising velocity v of the oil drop in the accident oil pool model h : r oil (T)=ρ oil (T ref )[1-β(TT ref ); In the above formula, ρ water is the density of water; g is the acceleration due to gravity; ρ oil (T) is the function of oil drop density with respect to temperature; β is the volume expansion coefficient of the oil drop; T is the current temperature of the oil drop; T ref is the reference temperature; oil (T ref ) is the density of the oil droplet at the reference temperature; μ(T) is the function of the oil droplet viscosity with respect to temperature; μ(T ref ) is the oil drop viscosity at the reference temperature; E a is the activation energy; R is the gas constant; S33. Calculate the initial velocity v of the horizontal motion of the transformer oil droplets v : In the above formula, V oil is the transformer oil volume of the transformer with the largest capacity in the substation; α is the volume adjustment factor; D is the diameter of the oil inlet (1); S34. Calculate the estimated cross-sectional area S of the accident oil pool model: In the above formula, V c is the volume of the accident oil pool model; H is the estimated height of the accident oil pool model; W is the theoretical width of the accident oil pool model; L is the estimated length of the accident oil pool model, and the estimated length L satisfies L≥W.

4. A parametric design method for a substation accident oil pool according to claim 3, characterized in that: The S4 includes: S41, the accident oil pool model is set to have a first end face (14) and a second end face (15) arranged opposite to each other in the width direction, and the actual length of the accident oil pool model is L0, and the actual width is W0; S42. A first baffle unit (100), a second baffle unit (200), and a third baffle unit (300) are sequentially arranged along the length direction in the accident oil pool model, wherein the first baffle unit (100) is arranged at one end of the accident oil pool model near the oil inlet (1), and the two ends of the first baffle unit (100) in the horizontal extension direction are respectively abutted against the first end face (14) and the second end face (15), the horizontal distance between the first baffle unit (100) and the end face where the oil inlet (1) of the accident oil pool model is located is L1, and the distance between the upper surface of the first baffle unit (100) and the inner surface of the accident oil pool model is L2. A first window is formed between the lower surface of the first baffle unit (100) and the inner surface of the accident oil pool model, the height of the second window is H1; a second window is formed between the lower surface of the first baffle unit (100) and the inner surface of the accident oil pool model, the height of the second window is H2; the movable portion of the first baffle extends in a vertical direction to adjust the height H1 of the first window or the height H2 of the second window; the distance between the second baffle unit (200) and the first baffle unit (100) is L2; ​​one end of the second baffle unit (200) is fixedly connected to the first end surface (14), and the other end thereof is extended toward the second end surface (15); the second baffle unit (200) is connected to the second end surface (15) ), a third window is formed between the upper surface of the second baffle unit (200) and the inner surface of the accident oil pool model, the height of the third window is H3, a fourth window is formed between the lower surface of the second baffle unit (200) and the inner surface of the accident oil pool model, the height of the fourth window is H4, and the movable part of the second baffle unit (200) extends in the vertical direction to adjust the height H3 of the third window or the height H4 of the fourth window; the distance between the third baffle unit and the second baffle unit (200) is L3, one end of the third baffle unit (300) is in contact with the second end surface (15) is fixedly arranged, and the other end thereof is extended toward the first end surface (14), the horizontal distance between the third baffle unit (300) and the first end surface (14) is W2, a fifth window is formed between the upper surface of the third baffle unit (300) and the inner surface of the accident oil pool model, and the height of the fifth window is H5, a sixth window is formed between the lower surface of the third baffle unit (300) and the inner surface of the accident oil pool model, and the height of the sixth window is H6, and the movable part of the third baffle unit (300) extends in the vertical direction to adjust the height H5 of the fifth window or the height H6 of the sixth window; S43, the height of the first window H1=0.5D, and the height relationship between the first window, the fifth window and the third window satisfies H1≥H5≥H3; the height of the second window H2=D0, and the height relationship between the second window, the sixth window and the fourth window satisfies H2>H4>H6; S44, the size of the first baffle unit (100) along the width direction of the accident oil pool model is W0, and the sizes of the second baffle unit (200) and the third baffle unit (300) along the width direction of the accident oil pool model are equal, both being [85% W0, 90% W0]; S45. The total distance of horizontal movement of the oil droplets in the accident oil pool model is not less than the estimated length L of the accident oil pool model.

5. A parametric design method for a substation accident oil pool according to claim 4, characterized in that: The horizontal distance L1 between the first baffle unit (100) and the end surface of the oil inlet (1) of the accident oil pool model is calculated according to the following formula: In the above formula, v v represents the initial horizontal velocity of the transformer oil droplet corresponding to the diameter D of the oil inlet (1); v vmax v v The maximum value of .

6. A parametric design system for a substation accident oil pool, characterized in that: The parametric design system includes an accident oil pool model construction module, an accident oil pool model volume acquisition module, a model parameter estimation module, a partition unit configuration module, a partition unit parameter estimation module, and a model output module; The accident oil pool model construction module is used to construct an accident oil pool model; the accident oil pool model is a rectangular structure, one end extending along its length direction is provided with an oil inlet (1), and the other end extending along its length direction is provided with a water outlet (2), the height of the oil inlet (1) is greater than the height of the water outlet (2), and the oil inlet (1) is connected to the oil tank below the transformer through a pipeline; The accident oil pool model volume acquisition module is used to acquire the transformer oil volume corresponding to the transformer with the maximum capacity of the substation, and design the volume of the accident oil pool model according to the transformer oil volume; The model parameter estimation module is used to obtain the estimated height, estimated length and estimated cross-sectional area of ​​the accident oil pool model based on the volume of the accident oil pool model; The partition unit configuration module is used to configure a plurality of partition units inside the accident oil pool model; the plurality of partition units are arranged at intervals along the length direction of the accident oil pool model, and both ends of the plurality of partition units in the height extension direction are provided with movable parts, and the movable parts are telescopically arranged relative to the partition units; The partition unit parameter estimation module is used to calculate the spacing between the plurality of partition units and the extension length of the movable parts of the plurality of partition units according to the size of the oil inlet (1) and the flow rate of the medium containing transformer oil fed into the oil inlet (1); The model output module is used to output the final accident oil pool model.

7. A parametric design system for a substation accident oil pool according to claim 6, characterized in that: A first boss (11) and a second boss (12) are provided at the bottom of the accident oil pool model. The first boss (11) and the second boss (12) are respectively provided at two ends of the accident oil pool model along the length direction of the accident oil pool model, and the second boss (12) is connected to the interior of the accident oil pool model. A water supply port (13) is also provided at one end of the accident oil pool extending along the length direction thereof. The height of the water outlet (2) is greater than the height of the water supply port (13), and the water supply port (13) is connected to a water source through a pipeline.

8. A parametric design system for a substation accident oil pool according to claim 6, characterized in that: The model parameter estimation module obtains the estimated height, estimated length and estimated cross-sectional area of ​​the accident oil pool model through the following steps: S31. Calculate the average oil droplet diameter d of transformer oil avg : In the above formula, d i is the diameter of the i-th oil droplet, n is the total number of oil droplet types; p i is the percentage of the number of the ith oil droplets to the total number of oil droplets; According to the average oil droplet diameter d avg Calculate the estimated height H of the accident oil pool model: In the above formula, d max is the maximum oil droplet diameter; It is the rounding operation; S32, according to the average oil droplet diameter d avg Calculate the rising velocity v of the oil drop in the accident oil pool model h : r oil (T)=ρ oil (T ref )[1-β(TT ref ); In the above formula, ρ water is the density of water; g is the acceleration due to gravity; ρ oil (T) is the function of oil drop density with respect to temperature; β is the volume expansion coefficient of the oil drop; T is the current temperature of the oil drop; T ref is the reference temperature; oil (T ref ) is the density of the oil droplet at the reference temperature; μ(T) is the function of the oil droplet viscosity with respect to temperature; μ(T ref ) is the oil drop viscosity at the reference temperature; E a is the activation energy; R is the gas constant; S33. Calculate the initial velocity v of the horizontal motion of the transformer oil droplets v : In the above formula, V oil is the transformer oil volume of the transformer with the largest capacity in the substation; α is the volume adjustment factor; D is the diameter of the oil inlet (1); S34. Calculate the estimated cross-sectional area S of the accident oil pool model: In the above formula, V c is the volume of the accident oil pool model; H is the estimated height of the accident oil pool model; W is the theoretical width of the accident oil pool model; L is the estimated length of the accident oil pool model, and the estimated length L satisfies L≥W.

9. A parametric design system for a substation accident oil pool according to claim 8, characterized in that: The partition unit parameter estimation module calculates the spacing between the partition units and the extension lengths of the movable parts of the partition units according to the following steps: S41, the accident oil pool model is set to have a first end face (14) and a second end face (15) arranged opposite to each other in the width direction, and the actual length of the accident oil pool model is L0, and the actual width is W0; S42. A first baffle unit (100), a second baffle unit (200), and a third baffle unit (300) are sequentially arranged along the length direction in the accident oil pool model, wherein the first baffle unit (100) is arranged at one end of the accident oil pool model near the oil inlet (1), and the two ends of the first baffle unit (100) in the horizontal extension direction are respectively abutted against the first end face (14) and the second end face (15), the horizontal distance between the first baffle unit (100) and the end face where the oil inlet (1) of the accident oil pool model is located is L1, and the distance between the upper surface of the first baffle unit (100) and the inner surface of the accident oil pool model is L2. A first window is formed between the lower surface of the first baffle unit (100) and the inner surface of the accident oil pool model, the height of the second window is H1; a second window is formed between the lower surface of the first baffle unit (100) and the inner surface of the accident oil pool model, the height of the second window is H2; the movable portion of the first baffle extends in a vertical direction to adjust the height H1 of the first window or the height H2 of the second window; the distance between the second baffle unit (200) and the first baffle unit (100) is L2; ​​one end of the second baffle unit (200) is fixedly connected to the first end surface (14), and the other end thereof is extended toward the second end surface (15); the second baffle unit (200) is connected to the second end surface (15) ), a third window is formed between the upper surface of the second baffle unit (200) and the inner surface of the accident oil pool model, the height of the third window is H3, a fourth window is formed between the lower surface of the second baffle unit (200) and the inner surface of the accident oil pool model, the height of the fourth window is H4, and the movable part of the second baffle unit (200) extends in the vertical direction to adjust the height H3 of the third window or the height H4 of the fourth window; the distance between the third baffle unit and the second baffle unit (200) is L3, one end of the third baffle unit (300) is in contact with the second end surface (15) is fixedly arranged, and the other end thereof is extended toward the first end surface (14), the horizontal distance between the third baffle unit (300) and the first end surface (14) is W2, a fifth window is formed between the upper surface of the third baffle unit (300) and the inner surface of the accident oil pool model, and the height of the fifth window is H5, a sixth window is formed between the lower surface of the third baffle unit (300) and the inner surface of the accident oil pool model, and the height of the sixth window is H6, and the movable part of the third baffle unit (300) extends in the vertical direction to adjust the height H5 of the fifth window or the height H6 of the sixth window; S43, the height of the first window H1=0.5D, and the height relationship between the first window, the fifth window and the third window satisfies H1≥H5≥H3; the height of the second window H2=D, and the height relationship between the second window, the sixth window and the fourth window satisfies H2>H4>H6; S44, the size of the first baffle unit (100) along the width direction of the accident oil pool model is W0, and the sizes of the second baffle unit (200) and the third baffle unit (300) along the width direction of the accident oil pool model are equal, both being [85% W0, 90% E0]; S45. The total distance of horizontal movement of the oil droplets in the accident oil pool model is not less than the estimated length L of the accident oil pool model.

10. A parametric design system for a substation accident oil pool according to claim 9, characterized in that: The horizontal distance L1 between the first baffle unit (100) and the end surface of the oil inlet (1) of the accident oil pool model is calculated according to the following formula: In the above formula, v v represents the initial horizontal velocity of the transformer oil droplet corresponding to the diameter D of the oil inlet (1); v vmax v v The maximum value of .

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