JP7079424B2 - Hydroelectric power plant operation support system - Google Patents

Description

The present invention relates to a hydroelectric power plant operation support system that supports the operation of a hydroelectric power plant.

Conventionally, various systems for supporting the operation of a hydroelectric power plant have been provided. In such a system, for example, as disclosed in Patent Document 1, the inflow amount of water into the dam (the inflow amount of water from another dam) is used to determine the water level of the dam during operation of the hydroelectric power plant. A system is known that controls the gate of the dam (that is, adjusts the discharge rate of water) when the predicted water level of the dam is equal to or higher than the upper limit or the lower limit of the water level of the dam.

According to the system having the above configuration, it is possible to prevent the water level of the dam from reaching the upper limit or the lower limit, and to prevent the dam from overflowing or running out of water in the dam.

Japanese Unexamined Patent Publication No. 61-98128

By the way, in a hydroelectric power plant, an output target value (output target value) is predetermined, and the operation is performed so that the actual output value matches this output target value.

However, since the above-mentioned conventional system is configured to adjust (increase or decrease) the discharge amount of water from the dam according to the amount of water flowing into the dam, the amount of water flowing from the dam to the hydropower plant is increased. Along with the change, the output of the hydropower plant may also change. Therefore, in the above-mentioned conventional system, the output of the hydroelectric power plant may deviate from the output target value planned in advance.

Therefore, in view of such circumstances, it is an object of the present invention to provide an operation support system for a hydroelectric power plant capable of providing support for operating a hydroelectric power plant with an output as planned.

The operation support system for the hydroelectric power plant of the present invention is
It is an operation support system for hydroelectric power plants to support the operation of hydroelectric power plants with dams.
Starting the control of the hydroelectric power plant Starting the prediction of the water level at the start of the control The pre-control inflow predicting means for predicting the inflow of water to the dam from the start of the prediction to the start of the control,
A means for deriving the planned amount of water used in the dam by the hydroelectric power plant from the start of the prediction to the start of the control, and a means for deriving the planned amount of water in the dam.
A start water level predicting means for predicting the water level of the dam at the start of control based on the inflow amount predicted by the pre-control inflow amount predicting means and the usage amount derived by the planned usage amount deriving means.
From the start of the control to the end of the control based on the differential water level derived from the target water level of the dam at the start of the control and the target value of the water level of the dam at the end of the control predicted by the water level predicting means. In the meantime, a usable amount deriving means for deriving the usable amount, which is the amount of water in the dam that can be used at the hydropower plant,
An output value deriving means for deriving an output target value of a hydroelectric power plant within a range that can be exhibited by the usable amount of water from the start of the control to the end of the control.
A control means for controlling the output of the hydroelectric power plant from the start of the control to the end of the control is provided based on the output target value derived by the output value derivation means.

According to the operation support system of the hydropower plant having the above configuration, the amount of water in the dam that can be used in the hydropower plant between the start of control and the end of control is determined before the control of the hydropower plant is started. It is obtained as a usable amount, and further, a target output value of a hydropower plant within a range that can be exhibited by the usable amount of water can be obtained from the start of control to the end of control.

Therefore, since the output of the hydroelectric power plant is controlled based on the target output value derived from the amount of water that can be used from the start of control to the end of control, the output of the hydroelectric power plant is from the output determined before the start of control. It is possible to prevent it from coming off.

Further, the operation support system for the hydroelectric power plant of the present invention is
A controlled inflow amount predicting means for predicting an increased amount of water indicating the amount of water flowing into the dam from the start of the control to the end of the control is provided.
The usable amount deriving means uses the amount of water obtained by adding the increased water amount to the difference water amount as the usable amount.
The output value deriving means may be configured to derive an output target value based on the usable amount.

According to the operation support system of the hydroelectric power plant having the above configuration, the amount of water flowing into the dam between the start of the control and the end of the control can be grasped as the water that can be used in the hydroelectric power plant, and therefore the target output value. The setting range of is widened.

Further, in the operation support system of the hydroelectric power plant of the present invention,
The increased amount of water may include the amount of water discharged from a dam installed upstream.

According to this configuration, the target output value is derived in consideration of the operating conditions of the hydroelectric power plant different from the hydropower plant to be supported, so that the output of the hydropower plant to be supported is the hydropower of the other hydropower plant. Fluctuations can be suppressed under the influence of the operating conditions of the power plant.

As described above, the operation support system for the hydroelectric power plant of the present invention predicts the amount of water that can actually be used and determines the output value within the predicted range. Therefore, the support for operating the hydroelectric power plant with the planned output is provided. It can have the excellent effect of being able to do it.

FIG. 1 is a schematic diagram of a water system composed of a plurality of dams and a hydroelectric power plant. FIG. 2 is a block diagram for explaining the configuration of a dam and a hydroelectric power plant. FIG. 3 is a functional block diagram of a hydroelectric power plant according to an embodiment of the present invention. FIG. 4 is a graph showing changes in the water level of the dam. FIG. 5 is a flowchart of the operation support system of the hydroelectric power plant according to the embodiment. FIG. 6 is a flowchart of the process of predicting the water level of the dam at the start of control in the operation support system of the hydroelectric power plant according to the same embodiment. FIG. 7 is a flowchart of a process for predicting the amount of water in a dam that can be used in a hydroelectric power plant in the operation support system of the hydroelectric power plant according to the same embodiment.

Hereinafter, an operation support system for a hydroelectric power plant (hereinafter referred to as an operation support system) according to an embodiment of the present invention will be described with reference to the attached drawings.

As shown in FIG. 1, the operation support system is a hydroelectric power generation facility Pm (see FIG. 2) composed of a dam Dm and a hydroelectric power plant Gm that generates power using water discharged from the dam Dm. It has been built.

On the upstream side of the hydroelectric power generation facility Pm where the operation support system is constructed, the hydroelectric power generation facility Ps (see Fig. 2), which is a set of another dam Ds and the hydroelectric power plant Gs, is located via a water channel such as a river. It is connected to each other, which constitutes the water system.

In the present embodiment, the hydroelectric power generation facility Pm on which the operation support system is constructed is referred to as the first hydroelectric power generation facility Pm, and the dam Dm and the hydroelectric power plant Gm constituting the first hydroelectric power generation facility Pm are referred to. They are called the first dam Dm and the first hydroelectric power plant Gm, respectively.

Further, the hydroelectric power generation equipment Ps different from the hydroelectric power generation equipment Ps in which the operation support system is constructed is referred to as the second hydroelectric power generation equipment Ps, and the dam Ds and the hydroelectric power plant constituting the second hydroelectric power generation equipment Ps. Gs is referred to as a second dam Ds and a second hydroelectric power plant Gs, respectively.

As shown in FIG. 2, the first hydroelectric power generation facility Pm and the plurality of second hydroelectric power generation facilities Ps are connected so as to be able to communicate with each other wirelessly or by wire.

The first dam Dm is provided with a gate Dm1 that controls the amount of water discharged.

The first hydroelectric power plant Gm includes a power generation unit Gm1 that generates power using water flowing from the upstream side through a river. The power generation unit Gm1 has a configuration including a water turbine, a generator connected to the water turbine, and the like.

Further, the first hydroelectric power plant Gm according to the present embodiment is provided with a processing device M such as a personal computer, and the operation support system according to the present embodiment is built on this processing device M.

The second dam Ds is also provided with a gate (not shown) for controlling the amount of stored water released. The second hydropower plant Gs also has a power generation unit that generates power using water flowing from the upstream side through the river, and this power generation unit is a water turbine or a generator connected to the water turbine. Any configuration may be used as long as it includes the above.

The operation support system generates power (first hydroelectric power generation) between the start of control when the output of the first hydroelectric power plant Gm starts to be controlled and the end of control when the output of the first hydroelectric power plant Gm ends. After predicting the amount of water in the first dam Dm that can be used for (power generation at Gm), the output within the range that can be exhibited by this amount of water is derived, and the output of the first hydroelectric power plant Gm is controlled based on the output. It is configured to do.

More specifically, as shown in FIG. 3, the operation support system according to the present embodiment is currently (at the time when the water level at the start of control for starting the control of the first hydropower plant Gm starts to be predicted). The current water level derivation means 2 for deriving the water level (hereinafter referred to as the current water level) and the prediction start time for predicting the water level at the start of control for starting the control of the first hydropower plant Gm to the start of the control. The pre-control inflow amount predicting means 3 for predicting the inflow amount of water into the first dam Dm (hereinafter referred to as the pre-control inflow amount), and the first hydraulic power between the start of the prediction and the start of the control. Based on the planned usage amount derivation means 4 for deriving the usage amount of water in the first dam Dm by the power plant Gm (hereinafter referred to as the pre-control usage amount), the pre-control inflow amount, and the pre-control usage amount. The water level at the start of predicting the water level of the first dam Dm at the start of control (hereinafter referred to as the water level at the start) and the water level at the end of control at the end of the control of the first hydropower plant Gm. Inflow into the first dam Dm between the target water level derivation means 6 for deriving the target value (hereinafter referred to as the target water level) and the end of control from the start of control to the end of control of the first hydropower plant Gm. The first period from the start of control to the end of control based on each of the controlled inflow amount predicting means 7 for predicting the amount of water to be applied (hereinafter referred to as the increased water amount) and the starting water level, the target water level, and the increased water amount. The usable amount predicting means 8 for predicting the amount of water (hereinafter referred to as the usable amount) of the first dam Dm that can be used in the hydropower plant Gm of the above, and the first within the range that can be exhibited by the usable amount of water. Based on the output value deriving means 9 for deriving the output value of the hydropower plant Gm and the target output value derived by the output value deriving means 9, the first from the start of the prediction to the start of the control. It is provided with a control means 10 for controlling the output of the hydropower plant Gm. Note that FIG. 4 shows T1 at the start of prediction, T2 at the start of control, T3 at the end of control, L1 at the start of control, and L2 at the end of control.

The current water level derivation means 2 may be configured to acquire water level information indicating the water level from the first dam Dm and derive the current water level based on the water level information, for example.

The pre-control inflow predictor 3 is a decrease rate (river water flow rate is natural) indicating the rate at which the river water flow rate (river flow rate) connected to the first dam Dm and the river water flow rate decrease with time. It is configured to predict the pre-control inflow based on the rate of decrease).

The pre-control inflow rate may be derived, for example, by multiplying the river flow rate by the reduction rate. If the river flow rate represents the amount of water flowing through the river per unit time, the derived pre-control inflow amount can be further multiplied by the time from the start of prediction to the start of control. good.

The planned usage amount deriving means 4 derives the output of the first hydroelectric power plant Gm from the start of prediction to the start of control and the required amount of water required to exert the output, and controls this required amount of water before control. It is configured to be the amount of water used.

The starting water level predicting means 5 is configured to derive a water level increase value due to the inflow of water in the pre-control inflow amount, and to derive a water level decrease value due to the discharge of the pre-control usage amount of water. Assuming that the starting water level L1, the rising value I1, and the decreasing value D1, the starting water level L1 is derived by the following equation 1.

The target water level deriving means 6 may be configured to read, for example, the target water level stored in advance in the processing device M from the processing device M. The target water level deriving means 6 may be configured to input the target water level between the start of prediction and the time when the usable amount predicting means 8 starts predicting the usable amount.

The inflow predicting means 7 during control includes the flow rate of the river from the start of control to the end of control and the amount of water discharged from the second hydroelectric power generation facility Ps operated from the start of control to the end of control. , Is derived, and it is configured to increase the amount of water based on each flow rate (added in this embodiment).

As for the flow rate of the river, as described above, the increased amount of water may be derived based on (multiply) the flow rate of the river and the rate of decrease indicating the rate at which the flow rate of water in the river decreases with time.

The usable amount predicting means 8 derives the rising value of the water level of the first dam Dm, which rises due to the inflow of the increased amount of water. Then, when the target water level is L2, the rising value is L3, and the amount of water per unit water level in the first dam Dm is X, the usable amount A is derived by the following equation 2.

As described above, the output value deriving means 9 may be configured to derive the output value of the first hydroelectric power plant Gm within the range that can be exerted in the usable amount, but can be exerted in the usable amount. It is preferable that it is configured to derive the upper limit output value. By doing so, it is possible to suppress the deviation that occurs between the target water level and the actual water level of the first dam Dm at the end of control.

The configuration of the driving support system 1 according to the present embodiment is as described above. Subsequently, the operation of the driving support system 1 according to the present embodiment will be described.

The operation support system 1 according to the present embodiment is the first hydroelectric power generation from the start of the control to the end of the control until the start of the control to start the operation support of the first hydroelectric power plant Gm. The amount of water that can be used in the Gm is predicted, the output value within the range of the output that can be produced by the predicted amount of water is determined, and the first hydroelectric power plant Gm is controlled so as to satisfy the output value.

More specifically, as shown in FIG. 5, the operation support system 1 predicts the water level of the first dam Dm at the start of control (S1) and the water level of the first dam Dm at the end of control (target). Water level) setting (S2), prediction of the amount of water in the first dam Dm that can be used in the first hydropower plant Gm from the start of control to the end of control (S3), Each process of determining the output value (S4) and controlling the operation of the first hydroelectric power plant Gm based on the output value (S5) is executed in order.

In the process of predicting the water level of the first dam Dm at the start of control, as shown in FIG. 6, the current water level derivation means 2 derives the water level of the first dam Dm at the present time (at the start of prediction) (S6). , The pre-control inflow amount predicting means 3 predicts the inflow amount of water (pre-control inflow amount) to the first dam Dm from the start of prediction to the start of control (S7).

Further, the planned usage amount deriving means 4 derives the water usage amount (pre-control inflow amount) in the first dam Dm by the first hydroelectric power plant Gm from the start of prediction to the start of control ( S8). Then, the starting water level predicting means 5 derives the water level (starting water level) of the first dam Dm at the start of control based on the current water level, the pre-control inflow amount, and the pre-control usage amount (S9). ..

(Prediction of water level at the end)
Subsequently, in the process of setting the target water level, the target water level deriving means 6 derives the water level at the end of control (S2 in FIG. 5).

Then, in the process of predicting the amount of water in the first dam Dm that can be used in the first hydroelectric power plant Gm from the start of control to the end of control (S3 in FIG. 5), the inflow amount prediction means 7 during control is used. The flow rate of the river connected to the upstream side of the first dam Dm is derived (S9). Further, as shown in FIG. 7, when there is a hydroelectric power generation facility that operates on the upstream side of the same water system from the start of control to the end of control (Yes in S10), the inflow amount predicting means 7 during control is said to be the same. The amount of water discharged from the hydroelectric power generation facility (the amount of water discharged during control) is derived (S11). Then, the controlled inflow amount predicting means 7 derives an increased water amount based on the flow rate of the river and the controlled water discharge amount (S12).

Then, the usable amount deriving means can be used in the first hydroelectric power plant Gm from the start of the control to the end of the control based on the start water level, the target water level, and the controlled water discharge amount. The usable amount, which is the amount of water, is derived (S13).

Further, the output value deriving means 9 derives (sets) the output value of the first hydroelectric power plant Gm based on the usable amount (S4 in FIG. 5), and during the period from the start of the control to the end of the control. Control means 10 controls the output of the first hydroelectric power plant Gm according to this output value (S5 in FIG. 5).

As described above, according to the operation support system 1 according to the present embodiment, the first hydropower is applied between the start of control and the end of control at the stage before the control of the first hydroelectric power plant Gm is started. The amount of water in the first dam Dm that can be used in the power plant Gm is obtained as the usable amount, and further, the first within the range that can be exhibited by the usable amount of water from the start of control to the end of control. The target output value of the hydroelectric power plant Gm is obtained.

Therefore, since the output of the first hydroelectric power plant Gm is controlled based on the target output value derived from the amount of water that can be used from the start of control to the end of control, the output of the first hydroelectric power plant Gm is controlled. It is possible to prevent the output from deviating from the output specified before the start. In this way, in order to predict the amount of water that can actually be used and determine the output value within the predicted area, it has the excellent effect of being able to support the operation of the first hydroelectric power plant Gm with the planned output. Can play.

In addition, since the amount of water flowing into the dam from the start of control to the end of control can be grasped as water that can be used at the hydroelectric power plant, the setting range of the target output value is widened.

Furthermore, since the target output value is derived in consideration of the operating conditions of the second hydroelectric power plant Gs, which is different from the first hydroelectric power plant Gm to be supported, the first hydroelectric power plant Gm to be supported is derived. It is also possible to suppress fluctuations in the output of the second hydroelectric power plant Gs under the influence of the operating conditions of the other second hydroelectric power plant Gs.

It should be noted that the driving support system of the present invention is not limited to the above embodiment, and it is needless to say that various changes can be made without departing from the gist of the present invention.

Although not particularly mentioned in the above embodiment, if there is a second power generation facility Ps that operates between the start of prediction and the start of control, the pre-control inflow amount prediction means 3 is the second power generation facility. The amount of water flowing in from Ps may be added to the amount of inflow before control.

Further, although not particularly mentioned in the above embodiment, the pre-control inflow amount predicting means 3 may acquire the amount of precipitation from the start of prediction to the start of control and add it to the pre-control inflow amount. .. The inflow amount predicting means 7 during control may also acquire the amount of precipitation from the start of control to the end of control and add it to the increased water amount.

1 ... Operation support system, 2 ... Current water level derivation means, 3 ... Pre-control inflow amount prediction means, 4 ... Planned amount derivation means, 5 ... Start water level prediction means, 6 ... Target water level derivation means, 7 ... Control inflow Amount prediction means, 8 ... Usable amount prediction means, 9 ... Output value derivation means, 10 ... Control means, Dm ... Dam (first dam), Dm1 ... Gate, Ds ... Dam (second dam), Gm ... Hydropower plant (first hydropower plant), Gm1 ... power generation unit, Gs ... hydropower plant (second hydropower plant), M ... treatment device, Pm ... hydropower facility (first hydropower facility), Ps ... Hydropower generation facility (second hydropower generation facility)

Claims (3)

It is an operation support system for hydroelectric power plants to support the operation of hydroelectric power plants with dams.
Starting the control of the hydroelectric power plant Starting the prediction of the water level at the start of the control The pre-control inflow predicting means for predicting the inflow of water to the dam from the start of the prediction to the start of the control,
A means for deriving the planned amount of water used in the dam by the hydroelectric power plant from the start of the prediction to the start of the control, and a means for deriving the planned amount of water in the dam.
A start water level predicting means for predicting the water level of the dam at the start of control based on the inflow amount predicted by the pre-control inflow amount predicting means and the planned use amount derived by the planned use amount deriving means.
From the start of the control to the end of the control based on the differential water level derived from the target water level of the dam at the start of the control and the target value of the water level of the dam at the end of the control predicted by the water level predicting means. In the meantime, a usable amount deriving means for deriving the usable amount, which is the amount of water in the dam that can be used at the hydropower plant,
An output value deriving means for deriving an output target value of a hydroelectric power plant within a range that can be exhibited by the usable amount of water from the start of the control to the end of the control.
A control means for controlling the output of the hydroelectric power plant from the start of the control to the end of the control is provided based on the output target value derived by the output value derivation means.
Operation support system for hydroelectric power plants. A controlled inflow amount predicting means for predicting an increased amount of water indicating the amount of water flowing into the dam from the start of the control to the end of the control is provided.
The usable amount deriving means uses the amount of water obtained by adding the increased amount of water to the usable amount as a new usable amount.
The output value deriving means derives an output target value based on the new usable amount.
The operation support system for the hydroelectric power plant according to claim 1. The increased amount of water includes the amount of water discharged from a dam installed upstream.
The operation support system for the hydroelectric power plant according to claim 2.

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