JP2015094322A - Rainwater drainage pump control device, rainwater drainage system and rainwater drainage pump control program - Google Patents

Abstract

PROBLEM TO BE SOLVED: To perform a preferable control over a rainwater drainage pump.SOLUTION: A rainwater drainage pump control device in accordance with one preferred embodiment controls a plurality of rainwater drainage pumps where a start sequence has already been set. The rainwater drainage pump control device comprises a pump control part and a water level setting part. The pump control part starts its corresponding rainwater drainage pump when a water level at a storage part into which rainwater flows becomes a starting water level set for each of the plurality of rainwater drainage pumps or more. The water level setting part sets the starting water level on the basis of a difference between an estimated value of a flow-in amount of rainwater into the storage part and a total value of a discharging amount of the rainwater drainage pump where the start sequence is more upper level than that of the rainwater drainage pump that is an object to be set for a starting water level, the first estimated time and a first prescribed water level.

Description

  Embodiments described herein relate generally to a rainwater drainage pump control device, a rainwater drainage system, and a rainwater drainage pump control program.

  In recent years, heavy rains (local heavy rains) have occurred frequently and locally. As a typical damage caused by local heavy rain, inundation flooding has occurred. As measures to prevent flooding, measures have been taken mainly for flooding due to flooding or rupture of large rivers, such as embankment, river channel excavation, revetment improvement and dam construction. River inundation is called outside water inundation. Conventionally, countermeasures against outside water inundation have been focused on, but in the future, it will be important to take into account inland water inundation. In fact, in urban areas where the development of dykes is relatively advanced, inundation floods tend to be more damaged, and prevention of inundation is a new issue.

  One countermeasure against inundation is the control of rainwater drainage facilities. In rainwater drainage facilities, rainwater that has flowed in by a rainwater drainage pump is discharged into a river or the like. In such rainwater drainage facilities, control is performed such that a reference water level is set for the rainwater pump well level where rainwater is stored, and the rainwater drainage pump is started or stopped based on a comparison between the rainwater pump well level and the reference water level. Often done. In relation to this, a technique for changing the reference water level is disclosed (for example, see Patent Documents 1 and 2).

JP 09-291888 A Japanese Patent Application Laid-Open No. 07-259175

In the prior art, the rainwater drainage pump may not be suitably controlled.
The problem to be solved by the present invention is to provide a rainwater drainage pump control device, a rainwater drainage system, and a rainwater drainage pump control program capable of suitably controlling a rainwater drainage pump.

  The rainwater drainage pump control device of one embodiment controls a plurality of rainwater drainage pumps for which an activation order is set. The rainwater drainage pump control device includes a pump control unit and a water level setting unit. A pump control part starts a corresponding rainwater drainage pump, when the water level of the storage part into which rainwater flows becomes more than the starting water level set about each of these rainwater drainage pumps. The water level setting unit has, for at least one of the plurality of rainwater drainage pumps, a predicted value of the inflow amount of rainwater to the storage unit and a startup order that is higher than a rainwater drainage pump that is a target for setting the startup water level. The starting water level is set based on the difference from the total discharge amount of the upper rainwater drainage pump, the first assumed time, and the first predetermined water level.

It is a figure which shows typically the rainwater drainage pump control apparatus 100 which concerns on one Embodiment, and the apparatus connected to this. It is a figure which shows an example of a function structure of the rainwater drainage pump control apparatus. It is a figure which shows an example of the starting water level and stop water level which are set about each pump. It is a figure which shows an example of the flow of the process performed by the inflow amount prediction model construction part. It is an image figure which shows typically transition of the prediction maximum value with respect to the inflow amount of rainwater, and a prediction minimum value. It is a figure which shows typically the process by the inflow amount prediction part. It is a figure which shows typically a mode that the starting water levels H (1) -H (N) of rainwater drainage pumps P1-PN are calculated | required based on Formula (15). It is a figure which shows typically a mode that the stop water level L (1) -L (N) of rainwater drainage pumps P1-PN is calculated | required based on Formula (17). It is a figure which shows typically a mode that the starting water level H (1) -H (N) of rainwater drainage pumps P1-PN is calculated | required based on Formula (19). It is a figure which shows typically a mode that the stop water level L (1) -L (N) of rainwater drainage pumps P1-PN is calculated | required based on Formula (20). It is a figure which shows typically a mode that the whole is raised after setting a starting water level. It is a figure which shows the example which lowered the starting water level of four rainwater drainage pumps as much as possible, and implemented control with the low starting water level. It is a figure which shows the example which lowered the starting water level of four rainwater drainage pumps as much as possible, and implemented control with the low starting water level. It is a figure which shows the example which lowered the starting water level of four rainwater drainage pumps as much as possible, and implemented control with the low starting water level. It is a figure which shows an example of display screen IM which displays the transition of the predicted value of an inflow amount, and the transition of a starting water level and a stop water level in alignment with a time axis.

Hereinafter, embodiments of a rainwater drainage pump control device, a rainwater drainage system, and a rainwater drainage pump control program will be described with reference to the drawings.
[Outline]
FIG. 1 is a diagram schematically showing a rainwater drainage pump control device 100 according to an embodiment and devices connected thereto. The rainwater drainage pump control device 100 is installed in, for example, a rainwater drainage facility (rainwater drainage system) 1 and controls the rainwater drainage pumps P1 to PN (n is an arbitrary natural number) of the rainwater drainage facility 1. The rainwater drainage facility 1 may be a single facility or a facility attached to a sewage treatment plant. In the rainwater drainage facility 1, rainwater flowing from the inflow trunk line 10, factory wastewater, and the like are stored in the rainwater pump well 20. The pumps P1 to PN discharge rainwater stored in the rainwater pump well 20 (not excluding factory wastewater or the like) to a river or the like. The rainwater pump well 20 is an example of a “reservoir”.

A main water level meter 12 and a velocimeter 14 are attached to the inflow main line 10, and the water level and the flow velocity that are output from these are information on the flow rate per unit time (main flow rate [m ³ / s]) by the converter 16. Is input to the rainwater drainage pump control device 100 together with the information converted into. The main line flow rate is an example of “the amount of rainwater flowing into the reservoir”. In addition, as the “inflow amount of rainwater to the storage unit”, the flow rate of other places such as the inflow rod 21 may be measured.

  Also, the rainwater drain pump control device 100 receives, for example, rainfall information from the ground rain gauge 30 and rainfall intensity information from the rain radar 40 via the network NW and the computer 50, respectively. The rainfall radar 40 transmits a radio wave in the air and receives a radio wave reflected by raindrops, thereby observing a rainfall situation in a certain observation range (for example, 250 [m] × 250 [m]). A signal output from the rainfall radar 40 is converted into a rainfall intensity [mm / h] for each mesh by a signal processing server (not shown) and output. Not only the information on one point but also information on a plurality of points may be input as the amount of rainfall and the rainfall intensity. The information input to the rainwater drainage pump control device 100 described above is merely an example, and some of these information may be omitted, and other information may be input to the rainwater drainage pump control device 100 as described later. It may be entered.

  The rainwater drainage facility 1 includes a gate portion 22 capable of blocking between the inflow trunk line 10 and the rainwater pump well 20, and a rainwater pump well water level meter 24 that detects and outputs the water level X of the rainwater pump well 20. When the amount of rainwater inflow is extremely large, the gate portion 22 may be blocked to block the amount of inflow into the rainwater pump well 20, but is normally maintained at a predetermined height. In FIG. 1, the water level X is described as being based on the bottom surface of the rainwater pump well 20, but in reality, even if the water level is based on Tokyo Peil, etc. Good. The detection value of the rainwater pump well level gauge 24 is input to the rainwater drainage pump control device 100. The rainwater drainage pump control apparatus 100 controls the rainwater drainage pumps P <b> 1 to PN and the gate unit 22 based on the various information input above, the detection value of the rainwater pump well level gauge 24, and downstream information (described later). .

  In addition, information on the upstream side of the rainwater drainage facility 1 and information on the downstream side are input to the rainwater drainage pump control device 100. The upstream information includes dam water level information, pump discharge information of the upstream pump facility, etc. in addition to the above-described main line flow rate, rainfall amount, and rainfall intensity. Further, the downstream information includes river water level information, tide level information, and the like. The information in the basin is closely related to the operation in the rainwater drainage facility 1, and the rainwater drainage pump control device 100 makes effective use of the information while the rainwater drainage pumps P1 to PN in the rainwater drainage facility 1. It is necessary to appropriately and efficiently control this.

  FIG. 2 is a diagram illustrating an example of a functional configuration of the rainwater drainage pump control device 100. The rainwater drainage pump control device 100 includes, for example, an inflow prediction unit 110, a basin monitoring data storage unit 112, an inflow amount prediction model construction unit 114, a prediction model parameter storage unit 116, and a start / stop water level setting unit 120. , A start / stop order setting unit 122, a pump capacity / pump well information storage unit 124, and a pump control unit 130.

  Among these, the inflow prediction unit 110, the inflow prediction model construction unit 114, the start / stop water level setting unit 120, the start / stop order setting unit 122, and the pump control unit 130 are, for example, a CPU (Central Processing Unit) or the like. It is a software function unit that functions when a processor executes a program. Also, some or all of these functional units may be functional units realized by a PLC (Programmable Logic Controller), or hardware such as an LSI (Large Scale Integration) or an ASIC (Application Specific Integrated Circuit). It may be a wear function unit. The basin monitoring data storage unit 112, the prediction model parameter storage unit 116, and the pump capacity / pump well information storage unit 124 include, for example, an HDD (Hard Disk Drive), a flash memory, a RAM (Random Access Memory), and a ROM (Read Only). Memory).

  The inflow amount prediction unit 110, based on the information such as the main line water level, main line flow velocity, main line flow rate, precipitation amount, rainfall intensity, etc. (hereinafter referred to as basin monitoring data), the inflow amount of rainwater into the rainwater pump well 20 in the future. Predict. The basin monitoring data is stored in the basin monitoring data storage unit 112. Based on the basin monitoring data stored in the basin monitoring data storage unit 112, the inflow amount prediction model construction unit 114 determines the parameters of the prediction model used for the prediction by the inflow amount prediction unit 110, and stores them in the prediction model parameter storage unit 116. Store. Details of the inflow amount prediction process will be described later.

  The start / stop water level setting unit 120 includes the prediction result of the inflow amount prediction unit 110, the start order and stop order of the rainwater drainage pumps P1 to PN, the pump capacity (discharge amount per unit time), the structure information of the rainwater pump well 20, and the like. Based on the above, the starting water level and the stopping water level of the rainwater drainage pumps P1 to PN are set. For example, the start / stop order of the rainwater drainage pumps P <b> 1 to PN is set by the start / stop order setting unit 122. The start / stop order setting unit 122 refers to, for example, the history of the start times of the rainwater drainage pumps P1 to PN in the past, and the start order of the rainwater drainage pumps with a short cumulative start time is higher and the stop order is lower. The activation order and the stop order are periodically reset so that the process becomes (that is, the apparatus is activated earlier and stopped later). Instead of this, the start order and stop order of the rainwater drainage pumps P1 to PN may be fixed. In this case, the start / stop order setting unit 122 is a storage unit that simply holds the order. Good. The pump capacity / pump well information storage unit 124 includes civil engineering information (structure information) such as the cross-sectional area and volume of the rainwater drainage pump well 20 and the inflow trough 21, discharge capacity of the rainwater pumps P1 to PN, warning water level (overflow water level) And information such as interlock water level is stored. Details of the start / stop water level setting process will be described later.

  When the water level of the rainwater pump well 20 becomes equal to or higher than the activation water level set for each of the rainwater drainage pumps P1 to PN, the pump control unit 130 activates the corresponding rainwater drainage pump, and the rainwater drainage pumps P1 to PN. When the water level becomes lower than the set stop water level, the corresponding rainwater drainage pump is stopped. FIG. 3 is a diagram illustrating an example of a start water level and a stop water level set for each pump. Here, it is assumed that the number n of pumps is four. In the figure, H (1) is the starting water level of the pump P1, and L (1) is the stopping water level of the pump P1. H (2) is the starting water level of the pump P2, and L (2) is the stopping water level of the pump P2. H (3) is the starting water level of the pump P3, and L (3) is the stopping water level of the pump P3. H (4) is the starting water level of the pump P4, and L (4) is the stopping water level of the pump P4. For example, when the water level X rises and becomes equal to or higher than the activation water level H (1), the pump control unit 130 activates the pump P1 and starts draining rainwater. Thereafter, when the water level X decreases and falls below the stop water level L (1), the pump control unit 130 stops the pump P1. In addition, when the water level X rises and becomes equal to or higher than the starting water level H (4), the pump control unit 130 starts the pumps P1, P2, P3, and P4 in this process in order, rather than the state where only the pump P1 is started. Drain a large amount of rainwater. In addition, after the water level X becomes equal to or higher than the starting water level H (4), the pump control unit 130 determines that the pumps P4, P3, P2, P1 in the process when the water level X decreases and becomes lower than the stop water level L (1). Are stopped in order and only a small amount of rainwater is discharged. As described above, the pump control unit 130 controls the pumps P1 to P4 such that more pumps are activated when the water level X becomes higher and only a few pumps are activated when the water level X becomes lower. In the figure, HH is a warning water level, and LL is an interlock water level (water level at which the pump mechanically stops).

[Inflow prediction processing]
Hereinafter, the inflow amount prediction process by the inflow amount prediction unit 110 will be described. Expressions (1) and (2) represent a prediction model that serves as a basis when the inflow amount prediction unit 110 predicts the inflow amount. In the equation, “i” is, for example, an inflow prediction model construction unit from the trunk water level, trunk flow velocity, trunk flow, rainfall, rainfall intensity, etc. (hereinafter referred to as “factor”) included in the basin monitoring data. The identifier of the key parameter selected by 114. MvY _i max (k) is a predicted maximum value of the inflow amount of rainwater based on the key parameter i, and mvY _i min (k) is a predicted minimum value of the inflow amount of rainwater based on the key parameter i. As will be described later, the inflow amount prediction unit 110 integrates the predicted values for each key parameter to predict the inflow amount of rainwater. In the formula, “k” is a sample number corresponding to the time in the time series data. “Mv” indicates a value smoothed by a process such as moving average. In addition, it is not an essential structure that the value in each formula demonstrated below is smooth | blunted, You may use the value of basin monitoring data itself. “K _i ” indicates the gain of the key parameter i, that is, the degree to which the key parameter i affects the inflow of rainwater. “U _i ” is a value of the key parameter i, and “L _i ” indicates a delay time, that is, a time until a time change of the key parameter i appears as a change in the inflow amount of rainwater. “B _i ” indicates a bias for the key parameter i, that is, an inflow amount of rainwater that occurs regardless of a change in the key parameter i.
mvY _i max (k) = K _i max × mvU _i (k−L _i ) + B _i max (i = 1, 2,..., M) (1)
mvY _i min (k) = K _i min × mvU _i (k−L _i ) + B _i min (i = 1, 2,..., M) (2)

  The inflow amount prediction model construction unit 114 performs parameters (“Ki”, “Li”, “Bi”) for configuring the prediction model represented by the expressions (1) and (2) by the process exemplified below. decide. FIG. 4 is a diagram illustrating an example of a flow of processing executed by the inflow amount prediction model construction unit 114. First, the inflow prediction model construction unit 114 extracts a plurality of periods corresponding to three or more rainfall events in which rainfall that is not zero or exceeds a predetermined threshold is recognized from the basin monitoring data storage unit 112 (Step S1). S200). The rainfall event includes “factors” such as main water level, main line flow velocity, main line flow rate, rainfall amount, and rainfall intensity.

  Next, the inflow prediction model construction unit 114 extracts key parameters that have a large influence on the inflow from the “factor” into the rainwater pump well 20 (step S202). For example, the inflow amount prediction model construction unit 114 performs an appropriate smoothing process such as a moving average process on the inflow amount of rainwater to the rainwater pump well 20 and each “factor”, and then shifts the time. Thus, a correlation coefficient is obtained, and “factors” for which the maximum value of the correlation coefficient exceeds a predetermined value are extracted as key parameters.

Next, the inflow amount prediction model construction unit 114 performs the following processing (steps S204 to S210) for each rain event.
First, the inflow prediction model construction unit 114 identifies the delay time “L _i ” for each key parameter (step S204). The inflow prediction model construction unit 114 represents the time-series data of each key parameter in the key parameter data matrix U _ij (j is the identification information of the rain event) represented by Expression (3), and Expression (4). The correlation coefficient R (k) is calculated by shifting the correlation coefficient with the rainwater pump well inflow data (vector) Y _j for each rainfall event while shifting the delay time L _ij back and forth in steps of the sampling period dT. In the formula, “E” represents an average value, and T represents transposition. The correlation coefficient is expressed by Equation (5). The inflow amount prediction model construction unit 114 extracts the delay time L _{ij in} which the correlation coefficient R (k) represented by the equation (5) is the maximum value, and uses it as the identification value.
Y _j = [{mvY _j (1) −E (mvY _j )}, {mvY _j (2) −E (mvY _j )},..., {MvY _j (n) −E (mvY _j )}] ^T (3)
U _ij = [{mvU _ij (1-L _ij ) −E (mvU _ij )}, {mvU _ij (2-L _ij ) −E (mvU _ij )},..., {MvU _ij (n−L _ij ) − E (mvU _ij )}] (4)

Next, the inflow amount prediction model construction unit 114 identifies the gain K _ij and the bias B _ij (Steps S206 to S210).
First, the inflow amount prediction model construction unit 114 performs an average value removal process (bias removal process) from mvY _j and mvU _ij (step S206). The average value removal process is expressed by Expression (7) obtained by modifying Expression (6). Expression (6) is a basic expression obtained by removing the concept of the maximum value and the minimum value from Expressions (1) and (2) described above. Then, the inflow prediction model construction unit 114 identifies the gain K _ij based on Expression (8) obtained by applying the least square method to Expression (7) (Step S208).
mvY _i (k) = K _i × mvU _i (k−L _i ) + B _i (i = 1, 2,..., M) (6)
_{mvY j (k) -E (mvY} j) = K ij × {mvU ij (k-I ij) -E (mvU ij)} ‥ (7)
^{_{K ij = Y T U ij /}} U ij T U ij (i = 1,2, ‥, M, j = 1,2, ‥, P) ‥ (8)

Here, since the bias is removed in Equation (7), only one parameter K _ij needs to be identified in Equation (8), and it is not necessary to perform the inverse matrix operation that is normally required by the least square method, and division is performed. The parameter K _ij can be estimated only by If the gain K _ij and the bias B _ij are to be estimated at the same time, it is necessary to perform a two-variable least squares method, and an inverse matrix operation is required. On the other hand, the inflow prediction model construction unit 114 of the present embodiment can avoid the inverse matrix calculation and reduce the processing load by adopting the above procedure.

Next, the inflow amount prediction model construction unit 114 identifies the bias B _ij using the identified gain K _ij (Step S210). The inflow amount prediction model construction unit 114 identifies the bias B _ij based on the equation (9) obtained by comparing the equations (6) and (7).
B _ij = E (mvY _j ) −K _ij × E (mvU _ij ) (9)

In this way, when the delay time L _ij , the gain K _ij , and the bias B _ij are identified for each rain event j, the inflow amount prediction model construction unit 114 does not depend on the rain event j, the delay time for each key parameter i, Obtain representative values of gain and bias. The inflow amount prediction model construction unit 114 derives representative values represented by the equations (10) to (12) by, for example, a position parameter extraction process using robust statistics and a scale parameter extraction process (step S212). ). In the equation, L _i , K _i , and B _i are representative values of delay time, gain, and bias that do not depend on a rain event for each key parameter. MED _j is the median (Median) for _j , MAD _j is the median absolute deviation (Median Absolute Deviation), α _L , α _K , α _B are coefficients, M is the number of key parameters, and P is the rain event Indicates the number of The median is an example of a position parameter using robust statistics. The median absolute deviation is an example of a scale parameter using robust statistics, and the difference between each data and the median is obtained, and the median of the differences is obtained. The coefficients α _L , α _K and α _B are set by the user or automatically within a range of, for example, about −1 to +1. According to Expressions (10) to (12), an estimated value having a bias according to the coefficient α is derived from the median of the identification values for all rainfall events.
L _i = MED _j (L _ij ) + α _L × MAD _j (L _ij ) i = 1, 2,..., M, j = 1, 2,..., P (10)
K _i = MED _j (K _ij ) + α _K × MAD _j (K _ij ) i = 1, 2,..., M, j = 1, 2,..., P (11)
B _i = MED _j (B _ij ) + α _B × MAD _j (B _ij ) i = 1, 2,..., M, j = 1, 2,..., P (12)

  Thus, since the inflow prediction model construction part 114 of this embodiment calculates | requires a representative value using not a mean value but a median value, it can obtain | require a robust value. When parameters are identified using multiple rain events, unrealistic parameter estimates are often obtained depending on the rain event. For this reason, when the averaging process is performed, a stable representative value may not be calculated because the representative value depends on an unrealistic parameter value. On the other hand, when the median is used, the median is known as a robust representative value (position parameter) estimator in the field of robust statistics, thus reducing the possibility of being influenced by unrealistic parameter values. Can be made. The inflow amount prediction model construction unit 114 may use another robust position parameter estimation method instead of the median processing. For example, the inflow amount prediction model construction unit 114 may use an HL estimation amount (Hodges-Lehman estimation amount) or the like, or may use a trimmed average trimmed by an appropriate percentage (trim average). Further, the inflow amount prediction model construction unit 114 may robustly estimate the average value by a method called bootstrap or subsampling. Further, the inflow prediction model construction unit 114 uses a robust scale parameter estimate corresponding to the standard deviation, for example, a standard estimate of trimming, a scale estimator using bootstrap or subsampling, instead of MAD. May be.

Here, the significance of the coefficients α _L , α _K , and α _B will be described. The parameters L _i , K _i , and B _i may be estimated values with no bias with α _L , α _K , and α _B being all zero, but the parameters in this embodiment predict the inflow to the rainwater pump well 20. Is to do. The predicted inflow amount is used to set the starting water level and the stopping water level of the rainwater drainage pumps P1 to PN. Here, regarding the setting of the startup water level, in order to prevent overflow, it is necessary to estimate as much as possible the amount of inflow that flows during the time required for startup, and conversely, at the time of stoppage, the level drops to the interlock water level. In order to prevent this, it is necessary to estimate the inflow amount as small as possible. Therefore, it is preferable that the predicted maximum value and the predicted minimum value of the inflow amount can be derived within a reasonable range. From this point of view, the inflow prediction model construction unit 114 of the present embodiment predicts the gain K _i and the bias B _{i by} setting α _K and α _B to appropriate positive values (for example, about 0 to 1). A value for deriving the maximum value is set, and a value for deriving the predicted minimum value is set by setting α _K and α _B to appropriate negative values (for example, about −1 to 0).

Regarding the delay time L _i , since it is generally not known in which direction the maximum value and the minimum value of the inflow amount come out with respect to the parameter sign, α _{L is set} to zero, for example, and the maximum value of the inflow amount is set. A common value may be used for predicting the minimum value and for predicting the minimum value.

  By such a method, the maximum value and the minimum value of the inflow amount can be appropriately derived within a reasonable range. FIG. 5 is an image diagram schematically showing the transition of the predicted maximum value and the predicted minimum value with respect to the inflow of rainwater.

When the inflow amount prediction model construction unit 114 determines the delay time L _{i for} each key parameter _i , the maximum value and the minimum value of the gain K _i , and the maximum value and the minimum value of the bias B _i by the method described above, Is stored in the prediction model parameter storage unit 116. The process by the inflow amount prediction model construction unit 114 is executed, for example, at a desired timing, and thereafter, periodically or irregularly as necessary.

The inflow amount prediction unit 110 is based on the above-described formulas (13) and (14) obtained by performing representative value extraction processing using robust statistics on the prediction formulas (1) and (2) for each key parameter. The predicted maximum value and the predicted minimum value are derived and provided to the start / stop water level setting unit 120. Where MED _i is the median value for _i and MAD _i is the median absolute deviation for i. β is a coefficient that can be arbitrarily set. For example, zero is set as an initial value, and may be set to be positive or negative depending on the rainfall situation. Note that MED and MAD can be replaced with an arbitrary robust estimation amount, as in equations (10) to (12). FIG. 6 is a diagram schematically illustrating processing by the inflow amount prediction unit 110.
mvYmax (k) = MED _i {mvY _i max (k)} + β × MAD _i {mvY _i max (k)} i = 1, 2,..., M (13)
mvYmin (k) = MED _i {mvY _i min (k)} + β × MAD _i {mvY _i min (k)} i = 1, 2,..., M (14)

  Here, (1) and (2) are prediction equations for each key parameter, but these may show non-uniform variations depending on the key parameter. For example, when the rainwater inflow prediction is performed using the rainfall, there may be a case where the rainwater inflow increases even though the rainfall is not recorded very large. As a case where such a phenomenon occurs, there is a case where there is not much rainfall at the measurement point, but there is a rainwater inflow from another area within the basin. Considering that such a situation occurs, robust statistics such as those expressed by equations (13) and (14) are used rather than simply performing an averaging process on the predicted values for each key parameter. It is considered that the accuracy of prediction is improved by extracting representative values by the representative value extraction process.

[Start / stop water level setting]
The start / stop water level setting unit 120 includes the predicted value of the inflow amount of rainwater provided from the inflow amount prediction unit 110, the start order and stop order set by the start / stop order setting unit 122, and the pump capacity / pump well. Based on the pump capacity stored in the information storage unit 124 and the structure information of the rainwater pump well 20, the start water level and the stop water level of the rainwater drainage pumps P1 to PN are set. The pump capacity / pump well information storage unit 124 may also store information such as the warning water level HH and the interlock water level LL of the rainwater pump well 20. In the following description, it is assumed that the activation order of the rainwater drainage pump is P1 → P2 →... → PN-1 → PN, and conversely, the stop order is set as PN → PN-1 →. To do. The start / stop water level setting unit 120 sets the start water level and the stop water level for only some of the rainwater drainage pumps P1 to PN, and the other start and stop water levels are fixed values. It does not matter.

  Note that the start / stop water level setting unit 120 may dynamically set only the start water level, and the stop water level may remain unchanged and remain unchanged. In this case, the pump control unit 130 determines the rainwater drainage pumps P1 to PN based on the start water level provided from the start / stop water level setting unit 120 and the stop water level as a fixed value stored in an arbitrary storage unit. Take control.

(First setting method)
The start / stop water level setting unit 120 sets the start water level and the stop water level, for example, by the method described below. The start / stop water level setting unit 120 determines the start water level H (n) of the rainwater drainage pump Pn (n = 1 to N) based on the equation (15). In the formula, HH is a warning water level as described above. Here, in place of the warning water level HH, an upper limit water level set to a water level lower than the warning water level HH may be used in order to provide a margin for control. S1 (n-1) (t) is the amount of inflow when it is assumed that the predicted maximum value of rainwater has flowed in during the estimated time Tpred1 required until the rainwater drainage pump Pn is started. It is an integrated value of a difference from the discharge amount of the pumps P1 to Pn-1. S1 (n-1) (t) is expressed by, for example, the formula (16). In the formula, Q _max (t) is the predicted maximum value of the inflow amount of rainwater at that time, and Q _n-1 (t) is the total discharge capacity of the rainwater drainage pumps P1 to Pn-1. Here, when the inflow amount prediction unit 110 outputs the prediction maximum value and the prediction minimum value without distinguishing between them, the prediction maximum value Q _max (t) is simply read as the prediction value Q (t).
H (n) = HH−S1 (n−1) (t) / A (15)

Moreover, A in Formula (15) is a cross-sectional area of the rainwater pump well 20. Therefore, S1 (n−1) (t) / A in the equation (15) corresponds to “the water level of the rainwater pump well 20 rising during the assumed time Tpred1”. The start / stop water level setting unit 120 sets the start water level of the rainwater drainage pump Pn by subtracting S1 (n-1) (t) / A from the warning water level HH. Note that S1 (1) may be obtained as Q _n-1 (t) = 0 in equation (15). FIG. 7 is a diagram schematically illustrating how the activation water levels H (1) to H (N) of the rainwater drainage pumps P1 to PN are obtained based on the equation (15).

  Here, if the cross-sectional area of the rainwater pump well 20 is constant, the start / stop water level setting unit 120 may perform the calculation with A as a constant value. In some cases, calculation including the portion of the trunk line 10 is required. Accordingly, the start / stop water level setting unit 120 refers to the structure information stored in the pump capacity / pump well information storage unit 124 and applies the value A (X) that changes according to the water level X of the rainwater pump well 20. Thus, an operation corresponding to Equation (4) may be performed.

  The estimated time Tpred1 when setting the activation water level is set to a time such as “activation time of rainwater drainage pump + control cycle”, for example. In addition, when smoothing processing such as moving average is performed in the inflow amount prediction stage, a delay associated with the moving average processing occurs half of the moving average time. Therefore, “start-up time of rainwater drainage pump + control cycle + moving A time such as “average time ÷ 2” may be set. Here, when the delay time Li is longer than the estimated time Tpred1, prediction can be performed only from the actually measured data. However, when the delay time Li is shorter than the estimated time Tpred1, the time of the difference Tpred1-Li is obtained. Perform extrapolation processing for minutes. As the extrapolation processing, there are a method of extrapolating a factor variable and a method of extrapolating a rainwater inflow prediction value, and either method may be used. In this process, an autoregressive model may be used, or the simplest 0th order extrapolation (0th order hold) or linear extrapolation (first order hold) may be performed. The estimated time Tpred1 is an example of “first estimated time”.

  By such a technique, “if the rainwater drainage pump Pn is not started at a certain control timing T1, the water level of the rainwater pump well 20 rises at the timing T2 at which the rainwater drainage pump Pn can be started next, and the warning water level HH If the situation is predicted to reach, the control of starting the rainwater drainage pump Pn at the control timing T1 is realized. The starting water level H (n) of the rainwater drainage pump Pn is set to a water level obtained by subtracting the water level S1 (n−1) (t) / A that is expected to rise from the warning water level HH between the control timings T1 and T2. This is because that. As a result, the activation water levels of the rainwater drainage pumps P1 to PN are set so as to be activated at just the right timing.

Further, the start / stop water level setting unit 120 determines the stop water level L (n) of the rainwater drainage pump Pn (n = 1 to N) based on the equation (17). In the formula, LL is the interlock water level as described above. Here, instead of the interlock water level LL, a lower limit water level set at a higher water level than the interlock water level LL may be used in order to provide a sufficient control. In addition, S2 (n) (t) is the sum of the discharge amount of the rainwater drainage pumps P1 to Pn and the predicted minimum value of rainwater during the estimated time Tpred2 required until the rainwater drainage pump Pn is stopped. It is the integrated value of the difference from the inflow amount when it is assumed that The estimated time Tpred2 is an example of “second estimated time”. S2 (n) (t) is expressed by, for example, the formula (18). In the formula, Q _min (t) is a predicted minimum value of the inflow amount of rainwater at that time, and Q _n (t) is the total discharge capacity of the rainwater drainage pumps P1 to Pn. Here, when the inflow amount prediction unit 110 outputs the prediction maximum value and the prediction minimum value without distinguishing between them, the prediction minimum value Q _min (t) is simply read as the prediction value Q (t). Further, S2 (n) (t) / A in Expression (17) corresponds to “the water level of the rainwater pump well 20 that decreases during the assumed time Tpred2”. The start / stop water level setting unit 120 sets the start water level of the rainwater drainage pump Pn by adding S2 (n) (t) / A to the interlock water level LL. FIG. 8 is a diagram schematically showing how the stop water levels L (1) to L (N) of the rainwater drainage pumps P1 to PN are obtained based on the equation (17). The extrapolation processing and the like are the same as the estimated time Tpred1.
L (n) = LL + S2 (n) (t) / A (17)

  According to such a technique, “if the rainwater drainage pump Pn is not stopped at a certain control timing T1, the water level of the rainwater pump well 20 is lowered and the interlock water level at the timing T2 at which the rainwater drainage pump Pn can be stopped next. If the situation is predicted to reach LL, the control of stopping the rainwater drainage pump Pn at the control timing T1 is realized. The stop water level L (n) of the rainwater drainage pump Pn is set to a water level obtained by adding the water level S2 (n) (t) / A, which is expected to decrease between the control timings T1 and T2, to the interlock water level LL. Because. As a result, the stop water level of the rainwater drainage pumps P1 to PN is set so as to stop at just the right time.

(Second setting method)
Further, the start / stop water level setting unit 120 may set the start water level and the stop water level by the method described below. The start / stop water level setting unit 120 determines the start water level H (n) of the rainwater drainage pump Pn (n = 1 to N) based on the equation (19). In the formula, H (n + 1) is the starting water level of the rainwater drainage pump whose starting order is one lower. When n = N, the warning water level HH is used as H (n + 1). Similar to the first setting method, instead of the warning water level HH, an upper limit water level set to a lower water level than the warning water level HH may be used in order to provide a margin for control. In addition, S1 (n−1) (t) is the inflow amount when it is assumed that the predicted maximum amount of rainwater has flowed in during the estimated time Tpred1 required until the rainwater drainage pump Pn is started, and the rainwater drainage. It is an integrated value of the difference from the total value of the discharge amounts of the pumps P1 to Pn-1. S1 (n-1) (t) is represented by the above formula (16). The start / stop water level setting unit 120 sets S1 (n−1) (t) / A, which is “the water level of the rainwater pump well 20 rising during the assumed time Tpred1”, to the rainwater drainage pump whose start order is one order lower. By subtracting from the starting water level of Pn + 1, the starting water level of the rainwater drainage pump Pn is set. FIG. 9 is a diagram schematically showing how the activation water levels H (1) to H (N) of the rainwater drainage pumps P1 to PN are obtained based on the equation (19).
H (n) = H (n + 1) −S1 (n−1) (t) / A (19)

  According to such a method, “when the rainwater drainage pump Pn is not activated at a certain control timing T1, the timing of activation of the rainwater pump well 20 rises at the timing T2 when the rainwater drainage pump Pn can be activated next. If the situation is predicted to reach the starting water level H (n + 1) of the lower rainwater drainage pump Pn + 1 (if n = N, the situation is expected to reach the warning water level HH), the control The control of starting the rainwater drainage pump Pn at the timing T1 is realized. The starting water level H (n) of the rainwater drainage pump Pn is a water level obtained by subtracting the water level S1 (n-1) (t) / A that is expected to rise from the starting water level H (n + 1) between the control timings T1 and T2. It is because it is set to. As a result, it is possible to suppress a situation where two or more rainwater drainage pumps are activated at the same timing. Accordingly, the activation water levels of the rainwater drainage pumps P1 to PN are set so as to be activated at just the right timing.

  Here, when compared with the first setting method, when the second setting method is adopted, the rainwater drainage pump is sequentially started at an earlier timing, as can be seen from the comparison between FIG. 7 and FIG. 9. Therefore, it is possible to prevent the occurrence of water more strongly. The first setting method is based on the assumption that the rainwater drainage pump Pn-1 is activated at the timing when the rainwater drainage pump Pn is activated. However, when the water level rise of the rainwater pump well 20 is abrupt, there is a possibility that the rainwater drainage pump Pn-1 is not activated at the timing when the rainwater drainage pump Pn is activated. There is an advantage in terms of avoiding inundation. On the other hand, if the capacity of the rainwater pump well 20 is not sufficient, the second setting method may be set too safe. That is, in the second setting method, if the capacity of the rainwater pump well 20 is not sufficient, there is a possibility that the activation water level of the rainwater drainage pump having a high activation order is lower than the interlock water level LL. Therefore, the first setting method has less restrictions on the structure of the rainwater pump well 20. As described above, which one of the first setting method and the second setting method is adopted may be appropriately selected according to the structure of the rainwater drainage facility 1, the rainfall tendency of the region, and the like. You may set a starting water level. For example, the activation water level may be determined by weighted averaging of both the activation water level set by the first setting method and the activation water level set by the second setting method.

Further, the start / stop water level setting unit 120 determines the stop water level L (n) of the rainwater drainage pump Pn (n = 1 to N) based on the equation (20). In the formula, L (n-1) is the stop water level of the rainwater drainage pump Pn-1 that is one stop order lower. When n = 1, the interlock water level LL is used as L (n−1). Further, similarly to the first setting method, instead of the interlock water level LL, a lower limit water level that is set to a higher water level than the interlock water level LL may be used in order to allow control. S2 (n) (t) indicates that the sum of the discharge amounts of the rainwater drainage pumps P1 to Pn and the predicted minimum rainwater flow in during the estimated time Tpred2 required until the rainwater drainage pump Pn is stopped. It is an integrated value of the difference from the inflow amount when assumed. S2 (n) (t) is represented by the above formula (18). Further, S2 (n) (t) / A in the equation (20) corresponds to “the water level of the rainwater pump well 20 that decreases during the assumed time Tpred2”. The start / stop water level setting unit 120 adds this S2 (n) (t) / A to the stop water level L (n-1) of the rainwater drainage pump Pn-1 which is one order lower in the stop order. The starting water level of the drainage pump Pn is set. FIG. 10 is a diagram schematically showing how the stop water levels L (1) to L (N) of the rainwater drainage pumps P1 to PN are obtained based on the equation (20).
L (n) = L (n-1) + S2 (n) (t) / A (20)

  By such a method, “when the rainwater drainage pump Pn is not stopped at a certain control timing T1, the water level of the rainwater pump well 20 is lowered at the timing T2 at which the rainwater drainage pump Pn can be stopped next, Is predicted to reach the stop water level L (n-1) of the lower rainwater drainage pump Pn-1 (when n = 1, it is predicted that the interlock water level LL will be reached). In such a situation, the control of stopping the rainwater drainage pump Pn at the control timing T1 is realized. The stop water level L (n) of the rainwater drainage pump Pn is expected to fall between the control timings T1 and T2 to the stop water level L (n-1) of the rainwater drainage pump Pn-1 that is one stop lower in order. This is because the water level is set to the sum of the water levels S2 (n) (t) / A. As a result, it is possible to suppress a situation in which two or more rainwater drainage pumps stop at the same timing. Accordingly, the stop water levels of the rainwater drainage pumps P1 to PN are set so as to stop at just the right time.

  In any case where the starting water level is set by the first setting method and the second setting method, the starting water level is first set by the expression (14) or (18), and then the starting water level falls below the interlock water level LL. When there is a water level, the entire startup water level may be raised while maintaining the ratio between the startup water levels so that they exceed the interlock water level LL. FIG. 11 is a diagram schematically showing how the whole is raised after the startup water level is set. In this case, the start / stop water level setting unit 120 sets the start water level H (1) to a desired water level that exceeds the interlock water level LL, and the ratio H (N) −H (N−1): H between the start water levels. (N-1) -H (N-2):...: H (3) -H (2): H (2) -H (1) is corrected so that each startup water level is maintained. In the figure, C is a constant determined according to the degree of correction of the startup water level H (1).

  The start water level and the stop water level set by the start / stop water level setting unit 120 are output as these “correction values” when the rainwater drainage facility 1 has initial values of the start water level and the stop water level. May be.

[Effects of the embodiment]
The main purpose of controlling the rainwater drainage pump is to avoid flooding. Therefore, in order to avoid the flooding as much as possible, it is considered that it is only necessary to lower the starting water level of all the rainwater pumps as much as possible and start the rainwater drainage pumps as soon as possible. By doing so, when the amount of inflow of rainwater increases, many rainwater drainage pumps can be activated quickly and discharged outside the facility.

  Here, since the stop water level needs to be set to a level lower than the start water level, if the start water level is lowered, the difference between the start water level and the stop water level is inevitably reduced. When the difference between the start water level and the stop water level becomes small, the frequency of start / stop of the rainwater drainage pump becomes very high, and a so-called chattering phenomenon occurs. Chattering not only causes damage to the rainwater drainage pump, but may also cause the harmful effect that the rainwater drainage pump has heat and takes a very long time to restart.

  12-14 has shown the example which lowered the starting water level of four rainwater drainage pumps as much as possible, and implemented control with the low starting water level. In these figures, the control cycle is fixed at 1 minute, the stop time of the rainwater drainage pump is fixed at 30 seconds, and the pump activation time is 1 minute (FIG. 12), 5 minutes (FIG. 13), 10 minutes (FIG. 14). It is an example of the simulation result of the water level control at the time of changing. The upper diagram of FIG. 12 represents the inflow amount to the rainwater pump well, the central diagram represents the pump discharge amount (four discrete levels corresponding to four pumps), and the lower diagram represents the water level of the rainwater pump well. . 13 and 14 show the pump discharge amount, and the lower figure shows the water level of the rainwater pump well. As can be seen from FIG. 12, when the start time of the rainwater drainage pump is short, the water level of the rainwater pump well can be controlled to a sufficiently low value, but the frequency of start / stop of the pump becomes very high, and the chattering phenomenon described above may occur. . On the other hand, if the start-up time of the rainwater drainage pump becomes longer, the chattering phenomenon will be suppressed, but the fluctuation (amplitude) of the water level will increase, and if the start-up time is 10 minutes, the water level will rise until the warning water level HH is exceeded. ing.

  Even if the control as shown in FIG. 12 is possible at the initial stage, the rainwater drainage pump has heat due to the chattering phenomenon, and eventually the control state shown in FIGS. As a result, inundation may occur. In other words, suppressing the frequency of starting and stopping the pump is an important factor not only from the problem of damage to the pump but also from the viewpoint of avoiding inundation.

  In order to suppress the pump start / stop frequency, it is desirable to increase the difference between the start water level and the stop water level for each rainwater drainage pump as much as possible. Further, when starting or stopping a plurality of rainwater drainage pumps at the same time, since the water level fluctuation increases, it is desirable to set the starting water levels of the plurality of pumps as far apart as possible. Therefore, under the condition that (1) the start water level and the stop water level for each storm water drain pump are separated as much as possible, and (2) the start water level is separated as much as possible between storm water drain pumps, (3) the start water level of each storm water drain pump is as much as possible. It is desirable to set it low.

  The rainwater drainage pump control apparatus 100 according to the present embodiment sets the starting water level by subtracting the maximum amount of water that can be accumulated during the assumed time Tpred1 from the warning water level HH, and the minimum that will inevitably decrease during the assumed time Tpred2. Since the pump stop water level is set by adding the amount of water to the interlock water level LL, the above conditions (1) to (3) can be satisfied. As a result, the rainwater drainage pump control device 100 can reduce the possibility that the water level of the rainwater pump well 20 reaches the warning water level HH, and can suppress the number of times the rainwater drainage pump is started and stopped.

  Note that, as described above, the rainwater drainage pump control apparatus 100 may dynamically set only the start water level of the rainwater drainage pump and set the stop water level to a fixed value. It is rather the start water level that needs to be changed dynamically according to the rainfall conditions, and even if there is a slight delay in the stop water level, the impact on inundation that should be avoided is minimal. It is. Of course, it is needless to say that the above effect can be maximized by setting both the starting water level and the stopping water level dynamically by the rainwater drain pump controller 100.

  The rainwater drainage pump control apparatus 100 may display the transition of the predicted value of the inflow amount and the transition of the startup water level and the stop water level to the user along the time axis. FIG. 15 is a diagram illustrating an example of a display screen IM that displays the transition of the predicted value of the inflow amount and the transition of the start water level and the stop water level in accordance with the time axis.

  According to at least one embodiment described above, the predicted value of the amount of rainwater flowing into the rainwater pump well 20 and the rainwater drainage pumps P1 to P1 whose startup order is higher than the rainwater drainage pump Pn that is the target for setting the startup water level. Based on the difference from the total discharge amount of Pn-1, the estimated time Tpred1, and the first predetermined water level (the warning water level HH or the starting water level of the pump having the one higher starting order), the rainwater drainage pump Pn Since the starting water level is set, the rainwater drainage pump can be suitably controlled.

  More specifically, according to the embodiment, based on the difference and the assumed time Tpred1, the water level of the rainwater pump well 20 that rises during the assumed time Tpred1 is derived, and the derived water level is the first predetermined water level. Since the starting water level of the rainwater drainage pump Pn is set based on the water level subtracted from the rainwater drainage pump, the rainwater drainage pump can be suitably controlled.

  Further, according to the embodiment, the discharge of the rainwater drainage pump Pn that is the target for setting the stop water level and the rainwater drainage pumps P1 to Pn-1 that are lower in the stop order than the rainwater drainage pump Pn that is the target for setting the stop water level. The difference between the total value of the amount and the predicted value of the amount of rainwater flowing into the rainwater pump well 20, the assumed time Tpred2, and the second predetermined water level (interlock water level or stop water level of the pump whose stop order is one lower) Therefore, since the stop water level of the rainwater drainage pump Pn is set, frequent start / stop (chattering) of the rainwater drainage pump can be suppressed. As a result, it is possible to prevent deterioration in the performance of the facility due to the start-up time being extended due to the heat generated by the rainwater drainage pump.

  In addition, according to the embodiment, the starting water level is set based on the predicted maximum value of the inflow amount of rainwater, and the stop water level is set based on the predicted minimum value of the inflow amount of rainwater. be able to.

  Moreover, according to the embodiment, by adopting the first setting method, it is possible to reduce restrictions on the structure of the rainwater pump well 20. On the other hand, by adopting the second setting method, it is possible to more strongly prevent the occurrence of flooding.

  Moreover, according to the embodiment, when there is an activation water level that is lower than the interlock water level LL, the overall activation water level is increased while maintaining the ratio between the activation water levels so that they are higher than the interlock water level LL. Can set a more realistic starting water level.

  In addition, according to the embodiment, since the inflow amount of rainwater is predicted by the representative value extraction process or the process using the scale parameter, it is possible to calculate a predicted value that matches the reality. As a result, the rainwater drainage pump can be more suitably controlled.

In addition, this embodiment is realizable in the following aspects.
A prediction unit that predicts the inflow of rainwater to a predetermined location by a representative value extraction process using robust statistics from prediction values derived based on a plurality of factors, and a prediction model that the prediction unit uses for prediction A rainwater inflow prediction apparatus comprising: a construction unit that constructs a prediction model expressed by parameters including delay time, gain, and bias.
In the above configuration, the prediction unit derives a predicted maximum value and a predicted minimum value of the inflow of rainwater using values obtained by the scale parameter extraction process.

  As mentioned above, although some embodiment of this invention was described, these embodiment is shown as an example and is not intending limiting the range of invention. These novel embodiments can be implemented in various other forms, and various omissions, replacements, and changes can be made without departing from the scope of the invention. These embodiments and modifications thereof are included in the scope and gist of the invention, and are included in the invention described in the claims and the equivalents thereof.

1 Rainwater drainage facility (rainwater drainage system)
20 Rainwater Pump Well 100 Rainwater Drainage Pump Control Device 110 Inflow Amount Prediction Unit 112 Basin Monitoring Data Storage Unit 114 Inflow Amount Prediction Model Construction Unit 116 Prediction Model Parameter Storage Unit 120 Start / Stop Water Level Setting Unit 122 Start / Stop Order Setting Unit 124 Pump Capacity / pump well information storage unit 130 Pump control unit P1-PN Rainwater drainage pump

Claims (14)

A pump control device for controlling a plurality of storm water drainage pumps for which a startup order is set, wherein the water level of the reservoir into which the rainwater flows is equal to or higher than the startup water level set for each of the plurality of storm water drainage pumps When the pump controller to activate the corresponding rainwater drainage pump,
For at least one rainwater drainage pump among the plurality of rainwater drainage pumps, the rainwater drainage pump whose startup order is higher than the predicted value of the amount of rainwater flowing into the storage section and the rainwater drainage pump that is the target for setting the startup water level A water level setting unit that sets the activation water level based on the difference from the total value of the discharge amount, the first assumed time, and the first predetermined water level;
A rainwater drainage pump control device. The water level setting unit derives a water level of the storage unit that rises during the first assumed time based on the difference and the first assumed time, and the derived water level is calculated as the first predetermined value. Setting the starting water level based on the water level subtracted from the water level;
The rainwater drainage pump control device according to claim 1. The first predetermined water level is a value common to the plurality of rainwater drainage pumps,
The rainwater drainage pump control apparatus according to claim 1 or 2. The first predetermined water level is a startup water level of a rainwater drainage pump whose startup sequence is one lower than a rainwater drainage pump that is a target for setting the startup water level.
The rainwater drainage pump control apparatus according to claim 1 or 2. The pump control unit, when the water level of the storage unit becomes less than the stop water level set for each of the plurality of rainwater drainage pumps, to stop the corresponding rainwater drainage pump,
The water level setting unit has a stop order with respect to at least one rainwater drainage pump among the plurality of rainwater drainage pumps as compared to a rainwater drainage pump that is a target for setting a stop water level and a rainwater drainage pump that is a target for setting the stop water level. The stop water level is set based on the difference between the total value of the discharge amount of the lower-level rainwater drainage pump and the predicted value of the amount of rainwater flowing into the reservoir, the second assumed time, and the second predetermined water level. To
The rainwater drainage pump control device according to any one of claims 1 to 4. The water level setting unit derives a water level of the storage unit that decreases during the second assumed time based on the difference and the second assumed time, and the derived water level is determined as the second predetermined value. Setting the stop water level based on the water level added to the water level;
The rainwater drainage pump control device according to claim 5. The second predetermined water level is a value common to the plurality of rainwater drainage pumps,
The rainwater drainage pump control apparatus according to claim 5 or 6. The second predetermined water level is a stop water level of a rainwater drainage pump whose start order is one higher than a rainwater drainage pump that is a target for setting a stop water level,
The rainwater drainage pump control apparatus according to claim 5 or 6. The predicted value of the inflow amount of rainwater to the storage part includes a predicted maximum value and a predicted minimum value,
The water level setting unit sets the starting water level of each rainwater drainage pump based on the predicted maximum value, and sets the stop water level of each rainwater drainage pump based on the predicted minimum value.
The rainwater drainage pump control device according to any one of claims 5 to 8. The water level setting unit maintains the ratio of the startup water level difference between the rainwater drainage pumps when the lowest startup water level among the startup water levels set for each of the plurality of rainwater drainage pumps is lower than a predetermined lower limit water level. The starting water level for each rainwater drainage pump is corrected so that the lowest starting water level exceeds the predetermined lower limit water level.
The rainwater drainage pump control device according to any one of claims 1 to 9. A prediction unit for deriving a predicted value of the amount of rainwater flowing into the storage unit, from the predicted value derived based on a plurality of factors, to the storage unit by representative value extraction processing using robust statistics A prediction unit for predicting the amount of inflow of rainwater
The rainwater drainage pump control apparatus according to any one of claims 1 to 10. The prediction unit derives a predicted maximum value and a predicted minimum value of the amount of rainwater flowing into the storage unit, using values obtained by the scale parameter extraction process,
The rainwater drainage pump control device according to claim 11. Multiple rainwater drainage pumps that have a startup sequence set;
A reservoir into which rainwater flows,
A pump control unit that activates a corresponding rainwater drainage pump when the water level of the storage unit is an activation water level set for each of the plurality of rainwater drainage pumps;
For at least one rainwater drainage pump among the plurality of rainwater drainage pumps, the rainwater drainage pump whose startup order is higher than the predicted value of the amount of rainwater flowing into the storage section and the rainwater drainage pump that is the target for setting the startup water level A water level setting unit that sets the activation water level based on the difference from the total value of the discharge amount, the first assumed time, and the first predetermined water level;
Equipped with rainwater drainage system. To the rainwater drainage pump control device that controls multiple rainwater drainage pumps that have a set startup sequence,
When the water level of the reservoir into which rainwater flows is the start water level set for each of the plurality of rainwater drainage pumps, the corresponding rainwater drainage pump is activated,
For at least one rainwater drainage pump among the plurality of rainwater drainage pumps, the rainwater drainage pump whose startup order is higher than the predicted value of the amount of rainwater flowing into the storage section and the rainwater drainage pump that is the target for setting the startup water level The starting water level is set based on the difference from the total value of the discharge amount, the first assumed time, and the first predetermined water level,
Rainwater drainage pump control program.

Images