JPH0626093A - Rain water pump operation supporting system - Google Patents

Abstract

PURPOSE:To precisely conduct the operation control for a rain water pump by provid ing an on-line system for displaying the operation for the rain water pump and an off-line system for conducting the simulation of rain water pump operation. CONSTITUTION:Duct water level data 1', 11' obtained by water level gauges 1, 11 installed in ducts of drainage basins (1), (2) are input to a data input device 1. Subsequently, the absolute data showing the operation status such as the number of operated pumps in the operation algorithm of a rain water pump operated in the past is input to the data input device 2. Subsequently, the water level data 1' is converted to the trunk flow rate, and according to the data 11', the rain water outflow rate from the drainage basin (2) to the trunk duct is computed by RRL method. According to the inflow rate to the trunk duct, simulation of water level in the duct is performed to output and display the water level at each calculating point on CRT screen. The rain water inflow rate to a pump place is estimated and simulation for pump well water level of the pump place is performed to output and display the water level on CRT screen, whereby the operation control for the rain water pump is precisely conducted. In on-line system, the pump operation guidance is displayed to assist an operator's operation.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a system for supporting the operation of a rainwater pump by predicting and grasping the amount of rainwater flowing into a rainwater drainage facility such as a pumping station or a sewage treatment plant.

[0002]

2. Description of the Related Art One of the main purposes of sewerage business is to prevent floods by promptly removing rainwater. The main operation of pumps for draining rainwater is to control the number of pumps operating according to the water level of the pump well, and the current situation is that decisions such as starting and stopping pumps depend on the operator's experience and experience. Is.

However, in recent years, the amount of inflow to the rainwater drainage facility has increased due to the increase in the impervious road surface due to the progress of urbanization, and therefore the time from rain to the inflow to the rainwater drainage facility is short, and moreover, The inflow volume per unit time increases, and in the unlikely event of flooding, the damage will be greater than before.

Therefore, as a countermeasure, the rainfall in the rainwater catchment area is measured at a plurality of points and the water level of the rainwater trunk line is measured to predict and grasp the inflow to the rainwater drainage facility. The need for systems that provide optimal rainwater pump operating methods is increasing.

[0005]

[Problems to be Solved by the Invention] Generally, a sewerage facility is planned several years before the facility starts operation. Therefore, when the facility actually starts operation, the amount of inflow to the rainwater drainage facility is It may be more than planned. In such a case, it is necessary to appropriately control the operation of the rainwater pump in consideration of the optimum operation method according to the operator's perception and experience.

The present invention accurately predicts and grasps the amount of inflow of rainwater into a rainwater drainage facility, and controls the operation of the rainwater pump without relying on the operator's cans and experience, so that inundation can be prevented even during heavy rain. It provides a control system that supports the operation of rainwater pumps without causing damage.

[0007]

[Means and actions for solving the problem] Based on the water level data obtained by the water level gauge installed in the pipe in the rainwater catchment area, the inflow amount to the rainwater drainage facility is predicted and grasped, and It consists of an online system that displays operational guidance for rainwater pumps that indicate the correspondence, and an offline system that can perform rainwater pump operation simulations based on past rainfall data and rainwater pump operation record data.

[0008]

FIG. 1 shows an example of a rainwater catchment area to which the rainwater pump operation support system of the present invention is applied. From the catchment area to the rainwater trunk conduit, and from the catchment area to the catchment and rainwater. The figure shows a state in which rainwater flows into a pump station, which is a rainwater drainage facility, through a trunk pipe.

FIG. 2 shows the amount of inflow to the pumping station (rainwater drainage facility) based on the water level data I'and II 'by the water level gauges I and II installed in the catchment area shown in FIG. In the system that supports the rainwater pump operation by predicting and grasping
It shows a flow of an off-line system for performing a rainwater pump operation simulation based on past data.

The offline system of FIG. 2 will be described.

In the data input 1, the past rainfall data and the water level data I ', II' by the water level gauges I, II installed in the water channels of the catchment area are input. At this time, when another rainwater pump operation algorithm is selected, the route is branched to Route 2, and when the rainwater pump operation algorithm is not changed, it is set to Route 1.

In the data input 2, the actual data representing the operating condition such as the number of rainwater pumps operated in the rainwater pump operation algorithm operated in the past is input.

The drainage water level data I'from the water level gauge I in the drainage pipe in the watershed which is input by the data input 1 is converted into the main runoff flow based on the shape of the rainwater main drainage pipe, and the Pipe water level data II 'by water level gauge II in the pipe
Is used for parameter adjustment of the RRL method (Roads Research Laboratory), and the rainwater outflow from the catchment area to the rainwater trunk pipe is calculated by the RRL method.

Based on these inflows into the rainwater main conduit, the water level in the rainwater main conduit is simulated by indeterminate flow calculation in the rainwater main conduit to determine the water level at each calculation point by CRT.
In addition to displaying the output on the screen, the amount of rainwater flowing into the pumping station (rainwater drainage facility) is predicted and calculated, and the pump well water level at the pumping station is simulated in consideration of the number of operating pumps, and the water level is output and displayed on the CRT screen or the like. at the same time,
It also shows the progress of the simulation.

By performing such a simulation by changing the pump operation algorithm, it is possible to find an appropriate operation of the rainwater pump at the pump station. FIG. 3 is an online system for performing the processing of the offline system for rainwater pump operation shown in FIG. 2 online, and shows a flow for outputting and displaying the pump operation guidance to assist the operator who operates the rainwater pump. It is shown.

The flow of the online system shown in FIG. 3 will be described. (1). Process data such as measured rainfall, rainwater pump operation cycle, and pump well water level sent from the rain gauge are input. (2). Based on the measured rainfall, as shown in Fig. 4, predicted rainfall 30 minutes ahead of the present time (for example, "Exponential smoothing method")
Input) as predicted rainfall data.

However, if it is predicted by the operator's judgment that this will happen, the operator manually inputs the value.

(3). The predicted rainfall data is input to the RRL method to calculate the outflow amount from the catchment area.

(4). The water level data I'from the water level gauge in the pipe in the catchment area is input every Δt time.

(5). The water level data I'is converted into "flow rate" based on the shape of the conduit in the catchment area. (6). The runoff flow of the rainwater trunk line is calculated based on the outflow from the concentrated area to the rainwater trunk line and the flow rate in the catchment basin.

(7). The number of pumps operating and the number of rotations are determined by the pump operation algorithm.

(8). The pump operation amount is output.

(9). Based on the flow rate value converted from the water level data I ′ and the pump operating condition (pump operation amount output), Δt ′
The water level in the rainwater main conduit is calculated every hour by non-constant flow calculation.

(10). The pump operating condition (pump operation amount) is fed back every Δt time and input together with the process data.

(11). Pump operation guidance that helps the operator, such as progress of pump operation amount output and process status, is output and displayed.

The forecast of rainfall in (2) above is as follows:
It is expected that the amount of rainfall converted by the exponential smoothing method as shown below will continue to be constant for 30 minutes from now, but if it is clearly predicted that this will occur in the judgment of the pump operator, It can also be manually corrected as shown in.

"Exponential smoothing method" Predicted rainfall amount from 5 minutes to 30 minutes (Ymm) Ymm = αXn + (1-α) Yn where Xn: present rainfall amount Yn: moving average based on past data ( 15 minutes or 30 minutes)
Rainfall α: Averaging constant (0∧α ≦ 1)

[0028]

As described above, according to the present invention, the inflow amount of rainwater flowing into a rainwater drainage facility such as a pump station or a treatment plant is 5 or less.
It is possible to predict up to 30 minutes ahead, and since the guidance of rainwater pump operation can be output and displayed online, regardless of the amount of rainwater inflow to the rainwater drainage facility, without depending on the operator's can and experience, It is possible to precisely control the operation of the rainwater pump.

Further, since it is possible to study past rain by various operating methods, it is possible to more accurately control the operation of the rainwater pump.

[Brief description of drawings]

FIG. 1 is an example of a rainwater catchment area to which a rainwater pump operation support system of the present invention is applied.

FIG. 2 is a flow of an off-line system for performing pump operation simulation in the rainwater pump operation support system of the present invention.

FIG. 3 is a flow of an online system for displaying pump operation guidance in the rainwater pump operation support system of the present invention.

FIG. 4 Rainfall prediction applied to an online system in the rainwater pump operation support system of the present invention

Claims (1)

[Claims] 1. An operation support system for a rainwater pump control device in a rainwater drainage facility in which rainwater flows from a rainwater catchment area through a rainwater trunk pipe, such as the amount of rainfall in the area and the pump well water level of the rainwater drainage facility. An online system for inputting process data, predicted rainfall data in the area, and pipe water level data in the area, and displaying guidance on the current process status and future correspondence to the inflow to the rainwater drainage facility, Past rainfall data in the area, pipe water level data in the area,
And the amount of rainwater runoff and runoff from the rainwater trunk line that is calculated from each catchment area in the area, which is calculated based on the actual data that indicates the pump operating status such as the number of pumps operating in the rainwater pump operating algorithm in the past. And from
Rainwater pump control consisting of an offline system that calculates the predicted inflow to the rainwater drainage facility and simulates the drainage water level in the rainwater catchment area and the pump well water level of the rainwater drainage facility by using the calculated values and the number of pumps operated. Device driving support system.