JP2574576B2 - Dam gate control device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a dam gate control device for performing various controls of a dam based on a calculation result of an amount of water flowing into the dam.

[0002]

2. Description of the Related Art In a conventional dam control device, the amount of change in dam water level within a certain period of time or the amount of water flowing into a dam is calculated based on the time required for the change in dam water level. We are performing dam control calculations.

[0003]

However, in the above-mentioned conventional dam control device, when a change in the dam water level occurs due to a disturbance, it cannot be determined, so that a stable inflow amount cannot be calculated. Therefore, there was a problem that stable dam control could not be performed.

SUMMARY OF THE INVENTION The present invention solves the above-mentioned conventional problems, and it is possible to calculate a stable and accurate inflow amount, and therefore to perform a stable and accurate constant water level control of a dam. It is an object of the present invention to provide a dam gate control device capable of performing the above-described steps.

[0005]

In order to achieve the above object, the present invention predicts a change in inflow from an upstream flow rate to a dam point to be controlled and estimates a change in dam water level. Hydraulic calculation means for comparing the estimated value of the change with the actual change in the dam water level and calculating the inflow using the change in the water level of the dam; and the calculated value of the change in the water level and the actual change in the dam water level. Fuzzy inference means for judging the difference in the amount by fuzzy inference, and using only the dam water level change amount judged to be valid for the calculation of inflow by the hydraulic calculation means, and the calculation results of the hydraulic calculation means And control means for controlling the gate.

[0006]

Therefore, according to the present invention, the dam water level change calculated by the hydraulic calculation means is compared with the actual dam water level change, and it is determined whether or not the difference is valid by fuzzy inference. If it is determined to be appropriate, the actual change in the water level of the dam is used for the calculation of the inflow by the hydraulic calculation means. Exclude from volume calculations. As described above, a stable and accurate inflow amount can be calculated, and the gate can be controlled by the control means based on the calculation result.

[0007]

An embodiment of the present invention will be described below with reference to the drawings.

FIG. 1 is a schematic block diagram showing a dam gate control device according to an embodiment of the present invention.

In FIG. 1, reference numerals 1a, 1b, 1c,... Indicate the upstream water level, that is, the water level of a dam upstream of the dam to be controlled, the water level of a river into which water flows into the dam to be controlled, and the like. 2 is a water level gauge for detecting a water level of a dam to be controlled, 3 is a gate machine side panel, 4 is a dam gate control device of the present invention, and hydraulic calculation means 5,
A fuzzy inference means 6, a control operation processing means 7, and a control output section 8 are provided. The hydraulic calculation means 5 includes the water level gauges 1a, 1
Using the output data of b, 1c,... and 2, a change in the amount of inflow from the upstream flow rate to the dam point to be controlled is predicted to estimate the change in the dam water level. And the inflow is calculated using the above estimated value. The fuzzy inference means 6 judges whether or not the difference between the estimated value of the water level change and the actual dam water level change is valid by fuzzy inference, and when it is judged to be valid, the actual dam water level change Is used in the calculation of the inflow amount in the hydraulic calculation means 5, and when it is determined that the flow is caused by disturbance and is not appropriate, it is excluded from the calculation of the inflow amount in the hydraulic calculation means 5. The control operation processing means 7 calculates the target value of the dam discharge amount, determines the gate operation amount, and the like based on the calculation result of the inflow amount in the hydraulic calculation means 5. The control output unit 8 controls the gate machine side panel 3 according to an instruction from the control arithmetic processing unit 7.

The above configuration will be described in further detail below along with its operation with reference to the flowchart shown in FIG.

First, the water level meter 1a,
1b, 1c, ..., the upstream flow rate of the dam to be controlled (step S1) is synthesized / trend extracted in consideration of the landing time (step S2), and a virtual inflow waveform at the dam point is obtained (step S3). . That is, the landing time at the dam point is obtained at a predetermined pitch (for example, a 5-minute pitch) from the current upstream flow rate, and a table is prepared for the past T minutes (for example, 60 minutes). Then, first, a dam point waveform for T minutes before and after the dam landing time and the flow rate is created for the flow rate at the most downstream point. At this time, the flow rate is set in the table from the flow rate at the oldest time. However, when the landing time is earlier with the subsequent flow rate and the flow rate up to that time is to be overtaken, all of those k% are added and set. Decrease the value accordingly. Similarly, the next upstream point is added to the waveform in consideration of overtaking.
Thereafter, all the points are added to form a composite waveform at the dam point.
The time at which the value is not set is interpolated from before and after. In this manner, as shown in the waveform explanatory diagram of FIG.

Next, as shown in FIG. 4, the hypothetical inflow C is calculated by the hydraulic calculation means 5 into three sections T1 and T1.
2, T0, calculate the change rate of each section, and
The average inflow amount KIQ is obtained (step S4), and the average inflow amount D (step 5) calculated last time is multiplied by the above-mentioned rate of change and extended as it is to obtain the extended inflow amount KIQ (step S6).
Thus, the change of the inflow into the dam is predicted from various data collected at the dam. From the extended inflow amount KIQ and the actual total discharge amount TOQ (step S7), a dam water level change amount △ h 'is calculated as (Equation 1) (step S7).
8).

[0013]

(Equation 1)

Here, UV (H): Unit water storage amount at dam water level H H (t0): Dam water level at present change H (−t1): Dam water level at previous change (valid judgment) Subsequently, dam water level change amount △ h ′ and the actual dam water level change Δh detected by the water level meter 2 (step S
9) to obtain a difference Δx1 (step S1).
0). Similarly, for the section (T1 + T2), the difference Δx2 is obtained.

Next, the fuzzy inference means 6 uses the fuzzy inference means 6 based on the rules shown in the table of inference rules in FIG.
〜100%) (steps S11 and S12).
That is, if the nine rules shown in FIG.
If x1 is small and △ x2 is small, the validity is very high. If △ x1 is large and △ x2 is large, the validity is very low. Judge the gender. If the validity is equal to or more than α%, it is determined that the current change in the water level of the dam is valid, and the hydraulic calculation means 5 calculates the inflow using the value (step S1).
3). On the other hand, if it is less than α%, it is regarded as a disturbance, treated as having no change in the dam water level, and is not used for calculating the inflow amount in the hydraulic calculation means 5 (step S14).

Based on the calculation result of the inflow amount, the control arithmetic processing means 7 calculates the target value of the dam discharge amount, determines the gate operation amount, and controls the gate machine side panel 3 via the control output section 8. I do.

As described above, the difference between the estimated value of the change in the dam water level and the actual change in the water level is determined by fuzzy inference, and the change in the dam water level due to disturbance is removed. Calculation becomes possible.

It is to be noted that the predicted inflow amount may be displayed, the operator confirms this, and if it is considerably different from the operator's prediction, it may be possible to correct it here. In addition, the present invention can be variously changed in design without departing from the basic technical idea.

[0019]

As described above, according to the present invention, the dam water level change calculated by the hydraulic calculation means is compared with the actual dam water level change, and the difference is determined by fuzzy inference. If it is determined that it is appropriate, the actual change in the water level is used for the calculation of the inflow by hydraulic calculation means. It is excluded from the calculation of the inflow amount by the logical calculation means. As described above, a stable and accurate inflow amount can be calculated, and the gate can be controlled by the control means based on the calculation result. Therefore, stable and accurate control of the dam can be performed.

[Brief description of the drawings]

FIG. 1 is a schematic block diagram illustrating a dam gate control device according to an embodiment of the present invention.

FIG. 2 is a flowchart for explaining the operation of the gate control device;

FIG. 3 is an explanatory diagram of a composite waveform and a virtual inflow waveform at a dam point obtained by the gate control device.

FIG. 4 is an explanatory diagram for calculating an extended inflow amount from a virtual inflow amount by the gate control device;

FIG. 5 is a table showing inference rules executed by fuzzy inference means of the gate control device.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Water level gauge 2 Water level gauge 3 Gate machine side panel 4 Gate control device 5 Hydraulic calculation means 6 Fuzzy inference means 7 Control calculation processing means 8 Control output part

Claims (1)

(57) [Claims] 1. Predicting a change in inflow from an upstream flow to a dam point to be controlled, calculating a change in dam water level, and comparing the estimated value of the change in dam water level with an actual change in dam water level. And the hydraulic calculation means for calculating the inflow using the dam water level change amount, and judging the difference between the estimated value of the water level change amount and the actual dam water level change amount by fuzzy inference,
Fuzzy inference means for using only the dam water level change determined to be valid for the inflow calculation of the hydraulic calculation means,
Control means for controlling a gate based on the calculation result of the hydraulic calculation means.