JP2000102295A - Controller for variable-speed pumped-storage generation station - Google Patents

Abstract

PROBLEM TO BE SOLVED: To eliminate steady difference caused by mismatch of characteristics by adding a control signal generated from a generating means to an opening command value which is operated through an opening operating means and then adding the control signal to the sum. SOLUTION: An r.p.m. command value operating section 12 calculates an r.p.m. command value of a pump turbine, based on the power command value of a generator motor, and the effective head of a pump turbine and a subtractor 13 determines the difference between the calculated r.p.m. command value and the actual r.p.m. of the pump turbine. An r.p.m. controller 14 generates a control signal for eliminating the difference between the actual r.p.m. and the r.p.m. command value and an adder 15 adds the control signal thus generated to an opening command value operated at an opening command value operating section 11. An adder 16 adds the control signal to the added results, thus eliminating steady difference caused by mismatch of characteristics, and matching the r.p.m. of the pump turbine with the r.p.m. command value is realized.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a control device for a variable-speed pumped-storage power generation system that controls the rotation speed of a pump turbine during an electric power generation operation to an optimum value.

[0002]

2. Description of the Related Art FIG.
FIG. 1 is a configuration diagram showing a control device of a conventional variable speed pumped storage power generation system disclosed in Japanese Patent Application Publication No. H10-207, in which reference numeral 1 denotes a guide vane opening command value and a rotation of a pump turbine from an electric power command value and an effective head of the pump turbine. Command value calculation unit for calculating the number command value,
Reference numeral 2 denotes a subtractor for calculating a difference between the rotation speed command value calculated by the command value calculation unit 1 and the actual rotation speed of the pump turbine, and 3 denotes a rotation for generating a control signal for eliminating the difference between the rotation speed command value and the actual rotation speed. The number controller 4 is an adder that adds the control signal generated by the rotation speed controller 3 to the opening command value calculated by the command value calculator 1.

Next, the operation will be described. First, the command value calculation unit 1 stores a data table indicating the correspondence between the power command value output to the excitation control system of the generator motor and the guide vane opening command value output to the servo control system of the pump turbine. (However, if the effective head of the pump turbine is different, the correspondence between the power command value and the opening command value changes, so a plurality of data tables are stored according to the effective head of the pump turbine. ), When the power command value and the effective head of the pump turbine are input, a data table corresponding to the effective head is selected, and the opening command value of the guide vane is calculated from the power command value with reference to the data table (FIG. 2
4).

Here, for example, when the effective head is 400 m, a data table having an effective head of 400 m is selected. However, there is no data table having an effective head of 400 m, and a data table having an effective head of 390 m and an effective head of 390 m. Is 41
If there is a 0 m data table, an opening command value corresponding to the power command value is calculated from each of the two data tables, and finally the opening is calculated from a proportional distribution based on the effective head of the two opening command values. Calculate the command value.

[0005] The command value calculation unit 1 calculates the power command value,
A data table indicating the correspondence between the rotation speed command value of the pump turbine is also stored. (However, if the effective head of the pump turbine is different, the correspondence relationship between the power command value and the rotation speed command value changes. A plurality of data tables are stored in accordance with the effective head of the turbine), when the power command value and the effective head of the pump turbine are input, the data table corresponding to the effective head is selected, and the data table is referred to. The command value of the rotation speed of the pump turbine is calculated from the power command value (see FIG. 25). The method of selecting the data table and the like are the same as in the case of calculating the opening degree command value.

When the command value calculation unit 1 calculates the rotation speed command value of the pump turbine, the subtractor 2 subtracts the actual rotation speed from the rotation speed command value of the pump turbine to obtain a deviation between the two. The deviation is output to the rotation speed controller 3. When the rotation speed controller 3 receives the difference between the rotation speed command value and the actual rotation speed from the subtractor 2, the rotation speed controller 3 matches the actual rotation speed with the rotation speed command value. And generates a control signal for eliminating the deviation.

When the rotation speed controller 3 generates a control signal, the adder 4 adds the control signal to the guide vane opening command value calculated by the command value calculation unit 1.
As a result, the servo control system controls the opening degree of the guide vanes based on the addition result of the adder 4, so that the flow rate supplied to the pump turbine is adjusted, and the rotation speed of the pump turbine matches the rotation speed command value. I do.

[0008]

Since the control device of the conventional variable-speed pumped-storage power generation system is configured as described above, as long as the data table stored in the command value calculator 1 matches the characteristics of the actual plant, Although the rotation speed of the pump turbine can be made to match the rotation speed command value, since the conditions incorporated during the experiment do not always match the conditions of the actual plant, the data table stored by the command value calculation unit 1 If the characteristics do not match, a steady-state deviation will remain between the guide vane opening command value and the actual opening, resulting in a difference between the pump turbine rotation speed command value and the actual rotation speed. , There is a problem that the rotation speed of the pump turbine cannot be matched with the rotation speed command value.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-described problems, and can eliminate the steady-state deviation caused by the mismatch of the characteristics so that the rotation speed of the pump turbine can be made to match the rotation speed command value. An object of the present invention is to obtain a control device for a variable speed pumped storage power generation system.

[0010]

A control device for a variable speed pumped storage power generation system according to the present invention adds a control signal generated by a generating means to an opening command value calculated by an opening calculating means, and adds the control signal to the control signal. The control signal is added to the addition result.

A control device for a variable speed pumped storage power generation system according to the present invention adds a deviation between a rotation speed command value of a pump turbine and an actual rotation speed to an opening command value calculated by the opening calculation device and generates Is added to the addition result.

The control device for a variable speed pumped storage power generation system according to the present invention obtains a difference value between the opening command value calculated by the opening calculating means and the actual opening of the guide vane, and calculates the difference from the opening command value. In addition to subtracting the value, the control signal generated by the generating means is added to the result of the subtraction.

The control device for the variable speed pumped storage power generation system according to the present invention, when adding the control signal generated by the generating means to the opening command value calculated by the opening calculating means, uses the control signal as an integral element. The control signal output from the integral element is added to the opening command value.

The control device for a variable speed pumped storage power generation system according to the present invention, when adding the deviation between the rotation speed command value and the actual rotation speed to the opening command value calculated by the opening calculation means, uses the difference as an integral element. And the deviation output from the integral element is added to the opening command value.

The control device for a variable-speed pumped-storage power generation system according to the present invention, when subtracting the difference value from the opening command value calculated by the opening calculating means, inputs the difference value to the integral element, Is subtracted from the opening command value.

The control device for the variable speed pumped storage power generation system according to the present invention multiplies the control signal by a constant corresponding to the absolute value of the control signal generated by the generation means, and inputs the multiplied control signal to the integration element. It is something to do.

The control device for a variable speed pumped storage power generation system according to the present invention multiplies the deviation by a constant corresponding to the absolute value of the deviation between the rotational speed command value and the actual rotational speed, and inputs the multiplied deviation to an integral element. It is something to do.

A control device for a variable-speed pumped-storage power generation system according to the present invention multiplies a constant corresponding to an absolute value of a difference value by the difference value and inputs the multiplied difference value to an integration element. is there.

In the control device for a variable speed pumped storage power generation system according to the present invention, the control signal is added to the opening command value only when the absolute value of the control signal generated by the generating means is larger than an allowable value. Things.

The control device for a variable speed pumped storage power generation system according to the present invention adds the deviation to the opening command value only when the absolute value of the deviation between the rotation speed command value and the actual rotation speed is larger than an allowable value. It was done.

The control device of the variable speed pumped storage power generation system according to the present invention is configured to add the difference value to the opening command value only when the absolute value of the difference value is larger than the allowable value.

A control device for a variable speed pumped storage power generation system according to the present invention is adapted to change an allowable value in accordance with an operation state of a pump turbine.

The control device for the variable speed pumped storage power generation system according to the present invention, when adding the control signal generated by the generating means to the opening command value calculated by the opening calculating means, according to the operating state of the pump turbine. The control signal is multiplied by the constant, and the multiplied control signal is added to the opening command value.

The control device for a variable speed pumped storage power generation system according to the present invention, when adding the deviation between the rotation speed command value and the actual rotation speed to the opening command value calculated by the opening calculation means, operates the pump turbine. Is multiplied by a constant corresponding to the deviation, and the deviation after the multiplication is added to the opening command value.

The control device for the variable speed pumped storage power generation system according to the present invention, when subtracting the difference value from the opening command value calculated by the opening calculation means, converts the constant according to the operating state of the pump turbine into the difference value. And the difference value after the multiplication is subtracted from the opening command value.

The control device of the variable speed pumped storage power generation system according to the present invention stores the correspondence between the past operation state of the pump-turbine and the correction amount, and determines the correction amount from the current operation state with reference to the correspondence relation. It is something to do.

The control device of the variable speed pumped storage power generation system according to the present invention is such that the opening degree calculating means changes the data table used for the calculation in accordance with the operating state of the pump turbine.

[0028]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below. Embodiment 1 FIG. FIG. 1 is a configuration diagram showing a control device of a variable speed pumped storage power generation system according to Embodiment 1 of the present invention.
In the figure, reference numeral 11 denotes an opening command value calculation unit (opening calculation means) for calculating an opening command value of a guide vane from an electric power command value and an effective head of a pump turbine, and 12 denotes an opening command value of an effective head of a pump turbine. A rotation speed command value calculating unit (rotation speed calculating means) 13 for calculating a rotation speed command value of the pump turbine, a difference 13 between the rotation speed command value calculated by the rotation speed command value calculating unit 12 and the actual rotation speed of the pump turbine Subtractor (generation means) to be obtained, 1
Reference numeral 4 denotes a rotation speed controller (generation means) for generating a control signal for eliminating a deviation between the rotation speed command value and the actual rotation speed, and 15 denotes a control signal generated by the rotation speed controller 14 for opening degree command value calculation unit 11 The adder (correction means) 16 adds the control signal generated by the rotation speed controller 14 to the addition result of the adder 15.

Next, the operation will be described. First, the opening command value calculation unit 11 stores data indicating the correspondence between the power command value output to the excitation control system of the generator motor and the guide command value of the guide vane output to the servo control system of the pump turbine. Since the table is stored (however, if the effective head of the pump turbine is different, the correspondence between the power command value and the opening command value changes, so a plurality of data tables are stored according to the effective head of the pump turbine. Input the power command value and the effective head of the pump turbine, select a data table corresponding to the effective head, and calculate the guide vane opening command value from the power command value with reference to the data table. (See FIG. 24).

Here, for example, when the effective head is 400 m, a data table having an effective head of 400 m is selected. However, there is no data table having an effective head of 400 m, a data table having an effective head of 390 m, and a data table having an effective head of 390 m. Is 41
If there is a 0 m data table, an opening command value corresponding to the power command value is calculated from each of the two data tables, and finally the opening is calculated from a proportional distribution based on the effective head of the two opening command values. Calculate the command value.

On the other hand, since the rotation speed command value calculating section 12 stores a data table indicating the correspondence between the power command value and the rotation speed command value of the pump turbine (the effective head of the pump turbine is different). Since the correspondence between the power command value and the rotation speed command value changes, a plurality of data tables are stored according to the effective head of the pump turbine.) When the power command value and the effective head of the pump turbine are input, A data table corresponding to the effective head is selected, and a rotation speed command value of the pump turbine is calculated from the power command value with reference to the data table (see FIG. 25). The method of selecting the data table and the like are the same as in the case where the opening command value calculation unit 11 calculates the opening command value.

When the rotational speed command value calculating section 12 calculates the rotational speed command value of the pump turbine, the subtractor 13 subtracts the actual rotational speed from the rotational speed command value of the pump turbine to obtain a deviation between the two. , And outputs the deviation to the rotation speed controller 14.
Then, when receiving a deviation between the rotation speed command value and the actual rotation speed from the subtractor 13, the rotation speed controller 14 sets the PI as the input signal in order to match the actual rotation speed with the rotation speed command value.
A D signal or the like is executed to generate a control signal for eliminating the deviation.

The adder 15 is connected to the rotation speed controller 14
Generates a control signal, the data table does not match the characteristics of the actual plant due to the steady-state deviation (the steady-state deviation remaining between the guide vane opening command value and the actual opening, and the pump-turbine rotation speed command value and The control signal output from the rotation speed controller 14 is added to the opening command value calculated by the opening command value calculation unit 11 in order to eliminate the steady-state deviation remaining between the actual rotation speeds.

That is, the control signal output from the rotation speed controller 14 substantially coincides with each of the above-mentioned steady-state deviations. When the actual rotation speed is smaller than the rotation speed command value, the control signal becomes a positive value. , The guide vane opening command value is corrected in a direction to increase. Therefore, the flow rate supplied to the pump turbine increases, and the actual rotation speed of the pump turbine increases. On the other hand, when the actual rotation speed is larger than the rotation speed command value, the control signal becomes a negative value, and thus the opening command value of the guide vane is corrected so as to decrease. Therefore, the flow rate supplied to the pump turbine decreases, and the actual rotation speed of the pump turbine decreases.

When the adder 15 adds the control signal to the opening command value, the adder 16 controls the rotation speed in order to eliminate the error of the actual rotation speed (error other than the steady-state deviation) with respect to the rotation speed command value. The control signal output from the adder 15 is added to the addition result of the adder 15. As a result, the servo control system controls the opening degree of the guide vane based on the addition result of the adder 16, so that the flow rate supplied to the pump turbine is adjusted, and the rotation speed of the pump turbine matches the rotation speed command value. I do.

As is apparent from the above, the first embodiment
According to the method, the control signal generated by the rotation speed controller 14 is added to the opening command value calculated by the opening command value calculation unit 11, and the control signal is added to the addition result of the adder 15. Thus, there is an effect that the steady-state deviation caused by the mismatch of the characteristics can be eliminated and the rotation speed of the pump turbine can be made to match the rotation speed command value.

Embodiment 2 FIG. 2 is a configuration diagram showing a control device for a variable speed pumped storage power generation system according to Embodiment 2 of the present invention. In the figure, the same reference numerals as those in FIG. 1 denote the same or corresponding parts, and a description thereof will be omitted. 17 is a subtractor 13
This is an adder (correction means) for adding the difference between the rotation speed command value of the pump turbine and the actual rotation speed, which is the result of subtraction, to the opening command value calculated by the opening command value calculation unit 11.

Next, the operation will be described. In the first embodiment, the case where the control signal generated by the rotation speed controller 14 is added to the opening command value calculated by the opening command value calculation unit 11 has been described. The opening command value calculated by the opening command value calculation unit 11 may be added.

That is, the difference between the command value of the rotation speed of the pump turbine and the actual rotation speed, which is the result of the subtraction by the subtractor 13, substantially coincides with each steady-state error. Since the subtraction result of the unit 13 becomes a positive value, the opening command value of the guide vane is corrected in a direction to increase. Therefore, the flow rate supplied to the pump turbine increases, and the actual rotation speed of the pump turbine increases. On the other hand, when the actual rotation speed is larger than the rotation speed command value, the subtraction result of the subtractor 13 becomes a negative value, and the command value for the guide vane opening degree is corrected to decrease. Therefore, the flow rate supplied to the pump turbine decreases, and the actual rotation speed of the pump turbine decreases.

As is apparent from the above, the second embodiment
According to the above, the difference between the rotation speed command value of the pump turbine and the actual rotation speed, which is the subtraction result of the subtractor 13, is added to the opening command value calculated by the opening command value calculation unit 11, and the rotation speed controller Since the control signal generated by the control unit 14 is added to the addition result of the adder 17, it is possible to eliminate the steady-state deviation caused by the mismatch of the characteristics and to match the rotation speed of the pump turbine to the rotation speed command value. The effect that can be performed.

Embodiment 3 FIG. 3 is a configuration diagram showing a control device for a variable speed pumped storage power generation system according to Embodiment 3 of the present invention. In the figure, the same reference numerals as those in FIG. 1 denote the same or corresponding parts, and a description thereof will be omitted. Reference numeral 18 denotes a subtractor (correction means) for subtracting the actual opening of the guide vane from the opening command value calculated by the opening command value calculation unit 11 to obtain a difference value between the opening command value and the actual opening. Is the opening command value calculator 1
A subtractor (correction means) for subtracting the difference value obtained by the subtractor 18 from the opening command value calculated in step 1.

Next, the operation will be described. In the first embodiment, the case where the control signal generated by the rotation speed controller 14 is added to the opening command value calculated by the opening command value calculation unit 11 has been described.
The difference value calculated by the subtractor 18 may be subtracted from the opening command value calculated by the following equation.

That is, the difference between the opening command value and the actual opening, which is the result of the subtraction by the subtractor 18, substantially matches each steady-state error.
When the actual rotation speed of the pump turbine is smaller than the rotation speed command value, the actual opening of the guide vane becomes larger than the opening command value, and the subtraction result of the subtractor 18 becomes a negative value. The degree command value is corrected to increase. Therefore, the flow rate supplied to the pump turbine increases, and the actual rotation speed of the pump turbine increases. On the other hand, if the actual rotation speed is larger than the rotation speed command value, the actual opening of the guide vane becomes smaller than the opening command value, and the subtraction result of the subtractor 18 becomes a positive value. The command value is corrected to become smaller. Therefore, the flow rate supplied to the pump turbine decreases, and the actual rotation speed of the pump turbine decreases.

As is clear from the above, the third embodiment
According to this, a difference value between the opening command value calculated by the opening command value calculation unit 11 and the actual opening of the guide vane is obtained, the difference is subtracted from the opening command value, and the rotation speed controller is controlled. Since the control signal generated by the control unit 14 is added to the result of the subtraction, it is possible to eliminate the steady-state deviation caused by the mismatch of the characteristics and to make the rotation speed of the pump turbine equal to the rotation speed command value. Play.

Embodiment 4 FIG. 4 is a configuration diagram showing a control device for a variable speed pumped storage power generation system according to Embodiment 4 of the present invention. In the figure, the same reference numerals as in FIG. 1 denote the same or corresponding parts, and a description thereof will be omitted. Reference numeral 20 denotes an integral element (correction means) provided between the rotation speed controller 14 and the adder 15.

Next, the operation will be described. In the first embodiment, the case where the control signal generated by the rotation speed controller 14 is immediately output to the adder 15 has been described.
For example, an integral element 20 having a time constant of 50 seconds may be provided, and the opening command value may be corrected at a slow rate of change. Thereby, there is an effect that the rotation speed of the pump turbine can be made to match the rotation speed command value without causing a large change in the rotation speed of the pump turbine due to a sudden change in the opening degree command value.

Embodiment 5 In the fourth embodiment, the case where the integration element 20 is provided between the rotation speed controller 14 and the adder 15 has been described. However, as shown in FIG. 21 (correction means) may be provided. Thus, the same effect as in the fourth embodiment can be obtained. Further, for the same reason, as shown in FIG. 6, an integrating element 22 (correction means) may be provided between the subtractor 18 and the subtractor 19.

Embodiment 6 FIG. FIG. 7 is a configuration diagram showing a control device for a variable speed pumped storage power generation system according to Embodiment 6 of the present invention. In the figure, the same reference numerals as those in FIG. 4 denote the same or corresponding parts, and a description thereof will be omitted. Reference numeral 23 is provided between the rotation speed controller 14 and the integration element 20, and the rotation speed controller 1
4 is a non-linear gain (correction means) for multiplying the control signal by a constant corresponding to the absolute value of the control signal generated by the control signal.

Next, the operation will be described. In the fourth embodiment, the case where the integration element 20 is provided between the rotation speed controller 14 and the adder 15 has been described. However, as shown in FIG. When the absolute value is small, the control signal is multiplied by a small constant. When the absolute value of the control signal is large, a non-linear gain 23 for multiplying the control signal by a large constant is provided between the rotation speed controller 14 and the integration element 20. You may make it.

As a result, when the error between the command value of the rotation speed of the pump turbine and the actual rotation speed increases and the absolute value of the control signal increases, the amplification factor of the nonlinear gain 23 increases. There is an effect that the rotational speed command value can be quickly matched. In FIG. 8, although the amplification factor of the nonlinear gain 23 is set in two stages, it goes without saying that the amplification factor may be set in more detail according to the absolute value of the control signal.

Embodiment 7 FIG. In the sixth embodiment, the non-linear gain 23 is set between the rotation speed controller 14 and the integration element 20.
Is shown, but as shown in FIG.
A non-linear gain 24 (correction means) may be provided between the subtractor 13 and the integration element 21. Thus, the same effect as in the sixth embodiment can be obtained. For the same reason, as shown in FIG.
A non-linear gain 25 (correction unit) may be provided between the first and second integration elements 22.

Embodiment 8 FIG. FIG. 11 is a configuration diagram showing a control device for a variable speed pumped-storage power generation system according to Embodiment 8 of the present invention. In the figure, the same reference numerals as in FIG. 1 denote the same or corresponding parts, and a description thereof will not be repeated. Reference numeral 26 denotes a dead zone element (correction unit) that outputs a control signal to the adder 15 only when the absolute value of the control signal generated by the rotation speed controller 14 is larger than an allowable value.

Next, the operation will be described. In the first embodiment, the case where the control signal generated by the rotation speed controller 14 is immediately output to the adder 15 has been described.
As shown in FIG. 12, while the absolute value of the control signal generated by the rotation speed controller 14 is smaller than an allowable value (upper limit or lower limit), a zero value is output to the adder 15, and the absolute value of the control signal is output. When the value becomes larger than the allowable value, a dead zone element 26 that outputs a value obtained by subtracting the allowable value from the control signal to the adder 15.
May be installed between the rotation speed controller 14 and the adder 15.

As a result, the opening command value is corrected only when the absolute value of the control signal exceeds the allowable value. Therefore, when the necessity of the correction is low, the correction is not performed and the extra control operation is omitted. It has an effect that can be done.

In the eighth embodiment, the dead zone element 26 is provided between the rotation speed controller 14 and the adder 15. However, as shown in FIG. 4 and FIG. In the case of installation, the dead zone element 26 may be installed after the integration element 20, and the same effect can be obtained.

Embodiment 9 FIG. In the eighth embodiment, the dead zone element 26 is provided between the rotation speed controller 14 and the adder 15. However, as shown in FIG. 13, the dead zone element is provided between the subtractor 13 and the adder 17. 27 (correction means) may be provided. Thereby, the same effect as in the eighth embodiment can be obtained. Also,
For the same reason, a dead zone element 28 (correction means) may be provided between the subtractor 18 and the subtractor 19 as shown in FIG.

As shown in FIGS. 5 and 6, the integral element 2
In the case of installing the elements 1 and 22, the dead zone elements 27 and 28 may be provided at the subsequent stage of the integration elements 21 and 22, and the same effect can be obtained.

Embodiment 10 FIG. FIG. 15 is a configuration diagram showing a control device for a variable speed pumped storage power generation system according to Embodiment 10 of the present invention. In the figure, the same reference numerals as in FIG. 11 denote the same or corresponding parts, and a description thereof will not be repeated. Reference numeral 29 denotes a dead zone width calculator (correction means) for setting a dead zone width (allowable value) according to the operating state of the pump turbine.

Next, the operation will be described. In the eighth embodiment, the dead zone element 26 is installed, and the opening command value is corrected only when the control signal is larger than the dead zone width. However, the dead zone width calculator 29 sets the operating state of the pump turbine to The dead zone width may be calculated accordingly, and the dead zone width may be changed appropriately.

That is, due to the characteristics of the pump-turbine, in addition to the operation state in which the rotation speed greatly changes only by a slight change in the guide vane opening, the rotation speed changes only slightly even if the guide vane opening greatly changes. There is a driving state.

Therefore, in the tenth embodiment, the dead zone width calculator 29 grasps the operating state of the pump turbine from the guide vane opening, the effective head, and the guide vane operating speed, and considers the characteristics of the pump turbine. In the case of an operating state in which the number of revolutions greatly changes with only a slight change in the guide vane opening, the dead band width is set to be wider (by selecting a function corresponding to the operating state, calculate). On the other hand, in an operation state in which the number of revolutions changes only slightly even when the guide vane opening greatly changes, the dead zone width is set to be narrower. As a result, there is an effect that the number of rotations can be efficiently controlled by omitting an extra control operation.

Embodiment 11 FIG. In the tenth embodiment, the setting of the dead band width (permissible value) of the dead band element 26 provided between the rotation speed controller 14 and the adder 15 has been described. However, as shown in FIG. A dead band width calculator 30 (correction means) for setting a dead band width (allowable value) of the dead band element 27 provided between the adder 13 and the adder 17 may be provided. Thus, the same effect as in the tenth embodiment can be obtained. Further, for the same reason, as shown in FIG.
A dead zone width calculator 31 (correction means) for setting a dead zone width (permissible value) of the dead zone element 28 installed between 9 may be provided.

Embodiment 12 FIG. FIG. 18 is a configuration diagram showing a control device for a variable speed pumped storage power generation system according to Embodiment 12 of the present invention. In the figure, the same reference numerals as in FIG. 1 denote the same or corresponding parts, and a description thereof will not be repeated. 32 is a gain calculator (correction means) for calculating a gain (constant) according to the operation state of the pump turbine, and 33 is a control signal multiplied by the gain calculated by the gain calculator 32, and the multiplied control signal is added. A multiplier (correction means) for outputting to the multiplier 15.

Next, the operation will be described. As described above, due to the characteristics of the pump turbine, in addition to the operation state in which the rotation speed greatly changes with only a slight change in the guide vane opening, the rotation speed changes only slightly even when the guide vane opening greatly changes. There is a driving state.

Therefore, in the twelfth embodiment, the gain calculator 32 grasps the operating state of the pump turbine from the guide vane opening, the effective head and the operating speed of the guide vane, and takes into account the characteristics of the pump turbine. In the case of an operating state in which the number of revolutions greatly changes with only a slight change in the guide vane opening, the gain of the multiplier 33 is set to be small (by selecting a function corresponding to the operating state, the multiplier is selected). 33 is calculated). On the other hand, in an operating state in which the rotation speed changes only slightly even if the guide vane opening greatly changes, the gain of the multiplier 33 is set to be large. Thereby, there is an effect that the rotation speed can be efficiently controlled according to the sensitivity of the pump turbine.

Embodiment 13 FIG. In the twelfth embodiment, the setting of the gain of the multiplier 33 provided between the rotation speed controller 14 and the adder 15 has been described. However, as shown in FIG. A gain calculator 34 (correction means) for setting the gain of the multiplier 35 (correction means) provided between the two may be provided. Thereby, the same effect as in the twelfth embodiment can be obtained. For the same reason, as shown in FIG. 20, a gain calculator 36 (correction means) for setting the gain of the multiplier 37 (correction means) provided between the subtractor 18 and the subtractor 19 is provided. You may do so.

Embodiment 14 FIG. FIG. 21 is a configuration diagram showing a control device for a variable speed pumped storage power generation system according to Embodiment 14 of the present invention. In the figure, the same reference numerals as in FIG. 1 denote the same or corresponding parts, and a description thereof will not be repeated. 38 is a correspondence relationship between the past operation states of the pump turbine (power command value, guide vane opening command value, rotation speed command value, effective head of pump turbine, actual rotation speed, actual opening of guide vane) and correction amount. Storage unit (correction amount determining means), 39 is a storage unit 38
Is a correction amount calculating unit (correction amount determining means) that determines a correction amount based on the current operation state with reference to the correspondence stored by.

Next, the operation will be described. In the first embodiment, the case where the control signal generated by the rotation speed controller 14 is output to the adder 15 to correct the opening command value has been described. May be stored, and the correction amount may be determined from the current operating state with reference to the correspondence.

That is, the storage unit 38 stores the past operating states of the pump turbine (power command value, guide vane opening command value, rotation speed command value, effective head of pump turbine, actual rotation speed, actual opening of guide vane). ) And the correction amount, the correction amount calculation unit 39 stores the correction amount corresponding to the changed operation state when the power command value or the like is changed and the operating state changes. Search from 38.

When the correction amount calculating section 39 searches for the correction amount corresponding to the changed operating state, the correction amount calculating section 39 outputs the correction amount to the adder 15, and outputs the correction amount calculated by the opening degree command value calculating section 11. Correct the degree command value. In the fourteenth embodiment, since the opening degree command value is corrected based on the past correction status, there is an effect that the error in the rotational speed can be safely and reliably eliminated.

Embodiment 15 FIG. FIG. 22 is a configuration diagram showing a control device for a variable speed pumped storage power generation system according to Embodiment 15 of the present invention. In the figure, the same reference numerals as in FIG. 1 denote the same or corresponding parts, and a description thereof will not be repeated. Reference numeral 40 denotes an opening command value calculation according to the operation state of the pump turbine (power command value, guide vane opening command value, rotation speed command value, effective head of pump turbine, actual rotation speed, actual opening of guide vane). The unit 11 is a table changing unit (table changing unit) that changes a data table used for calculation.

Next, the operation will be described. In the first embodiment, the control signal generated by the rotation speed controller 14 is output to the adder 15 to correct the opening command value. However, the opening signal is corrected according to the operating state of the pump turbine. The command value calculation unit 11 may change a data table used for calculation.

That is, the opening command value calculation unit 11 stores a data table indicating the correspondence between the power command value and the opening command value, and determines the opening command value with reference to the data table. When the operating state of the pump turbine changes, errors such as the number of revolutions also change.

Therefore, in the fifteenth embodiment, the table changing unit 40 sets the operating state of the pump turbine (power command value,
(The guide vane opening command value, the rotation speed command value, the effective head of the pump turbine, the actual rotation speed, and the actual opening of the guide vane) are monitored. The data table used is corrected so that errors such as the number of revolutions are always eliminated. Thereby, even if the friction coefficient of the penstock changes due to aging, for example, there is an effect that the rotation speed of the pump turbine can be made to match the rotation speed command value.

[0075]

As described above, according to the present invention, the control signal generated by the generating means is added to the opening command value calculated by the opening calculating means, and the control signal is added to the addition result. Since the configuration is such that the addition is performed, there is an effect that the steady-state deviation caused by the mismatch of the characteristics is eliminated and the rotation speed of the pump turbine can be made to match the rotation speed command value.

According to the present invention, the difference between the rotation speed command value of the pump turbine and the actual rotation speed is added to the opening command value calculated by the opening calculation device, and the control signal generated by the generation device is added to the difference. Since it is configured to add to the addition result, there is an effect that the steady-state deviation due to the mismatch of the characteristics is eliminated, and the rotation speed of the pump turbine can be made to match the rotation speed command value.

According to the present invention, a difference value between the opening command value calculated by the opening calculating means and the actual opening of the guide vane is obtained, the difference value is subtracted from the opening command value, and the generating means is obtained. Is added to the result of the subtraction, there is an effect that the steady-state deviation accompanying the mismatch of the characteristics can be eliminated and the rotation speed of the pump turbine can be made to match the rotation speed command value. .

According to the present invention, when the control signal generated by the generating means is added to the opening command value calculated by the opening calculating means, the control signal is input to the integral element and output from the integral element. The control signal to be added to the opening command value is configured so that the rotation speed of the pump turbine can be changed to the rotation command value without causing a large change in the rotation speed of the pump turbine due to a sudden change in the opening command value. There is an effect that can be matched.

According to the present invention, when the deviation between the rotational speed command value and the actual rotational speed is added to the opening command value calculated by the opening calculating means, the deviation is input to the integral element, and Since the output deviation is configured to be added to the opening command value, the rotation speed of the pump turbine is converted to the rotation command value without causing a large change in the rotation speed of the pump turbine due to a sudden change in the opening command value. There is an effect that can be matched.

According to the present invention, when the difference value is subtracted from the opening command value calculated by the opening calculating means, the difference value is input to the integration element, and the difference value output from the integration element is calculated. The effect of being able to match the rotation speed of the pump turbine with the rotation speed command value without causing a large fluctuation in the rotation speed of the pump turbine due to a sudden change in the opening degree command value is configured to subtract from the rotation speed command value. There is.

According to the present invention, since the control signal is multiplied by a constant corresponding to the absolute value of the control signal generated by the generating means and the multiplied control signal is input to the integration element, Even if the error between the rotation speed command value of the water turbine and the actual rotation speed becomes large, there is an effect that the rotation speed of the pump turbine can be quickly matched with the rotation speed command value.

According to the present invention, the deviation is multiplied by a constant corresponding to the absolute value of the deviation between the rotational speed command value and the actual rotational speed,
Since the deviation after the multiplication is configured to be input to the integral element, even if the error between the rotation speed command value of the pump turbine and the actual rotation speed increases, the rotation speed of the pump turbine quickly matches the rotation speed command value. There is an effect that can be.

According to the present invention, the difference value is multiplied by a constant corresponding to the absolute value of the difference value, and the multiplied difference value is input to the integration element. Thus, even when the error between the actual rotation speed and the actual rotation speed increases, the rotation speed of the pump turbine can be quickly matched with the rotation speed command value.

According to the present invention, only when the absolute value of the control signal generated by the generating means is larger than the allowable value,
Since the control signal is configured to be added to the opening command value,
When the necessity of the correction is low, the correction is not performed, and there is an effect that an extra control operation can be omitted.

According to the present invention, the deviation is added to the opening command value only when the absolute value of the deviation between the rotation speed command value and the actual rotation speed is larger than the allowable value. When the value is low, no correction is performed, and there is an effect that an extra control operation can be omitted.

According to the present invention, the difference value is added to the opening command value only when the absolute value of the difference value is larger than the allowable value. There is an effect that the extra control operation can be omitted without being performed.

According to the present invention, since the allowable value is changed according to the operating state of the pump turbine, there is an effect that the number of rotations can be efficiently controlled by omitting an extra control operation. .

According to the present invention, when adding the control signal generated by the generating means to the opening command value calculated by the opening calculating means, the control signal is multiplied by a constant corresponding to the operating state of the pump turbine. Since the multiplied control signal is added to the opening command value, the number of revolutions can be efficiently controlled according to the sensitivity of the pump turbine.

According to the present invention, when adding the deviation between the rotation speed command value and the actual rotation speed to the opening command value calculated by the opening calculation means, a constant corresponding to the operating state of the pump turbine is used as the difference. Since the multiplication is performed and the deviation after the multiplication is added to the opening command value, there is an effect that the rotation speed can be efficiently controlled according to the sensitivity of the pump turbine.

According to the present invention, when the difference value is subtracted from the opening command value calculated by the opening calculating means, the difference value is multiplied by a constant corresponding to the operating state of the pump turbine, and the multiplied difference is calculated. Since the value is subtracted from the opening command value, there is an effect that the rotation speed can be efficiently controlled according to the sensitivity of the pump turbine.

According to the present invention, the correspondence between the past operating state of the pump-turbine and the correction amount is stored, and the correction amount is determined from the current operation state with reference to the correspondence, so that the safety is improved. There is an effect that the error in the number of rotations can be surely eliminated.

According to the present invention, since the data table used for the calculation by the opening degree calculating means is changed according to the operating state of the pump turbine, for example, the friction coefficient of the penstock changes due to aging. Even so, there is an effect that the rotation speed of the pump turbine can be made to match the rotation speed command value.

[Brief description of the drawings]

FIG. 1 is a configuration diagram showing a control device of a variable speed pumped storage power generation system according to Embodiment 1 of the present invention.

FIG. 2 is a configuration diagram illustrating a control device of a variable speed pumped storage power generation system according to Embodiment 2 of the present invention.

FIG. 3 is a configuration diagram illustrating a control device of a variable speed pumped storage power generation system according to Embodiment 3 of the present invention.

FIG. 4 is a configuration diagram showing a control device of a variable speed pumped storage power generation system according to Embodiment 4 of the present invention.

FIG. 5 is a configuration diagram showing a control device of a variable speed pumped storage power generation system according to Embodiment 5 of the present invention.

FIG. 6 is a configuration diagram showing a control device of a variable speed pumped storage power generation system according to Embodiment 5 of the present invention.

FIG. 7 is a configuration diagram showing a control device of a variable speed pumped storage power generation system according to Embodiment 6 of the present invention.

FIG. 8 is a characteristic diagram showing characteristics of a nonlinear gain.

FIG. 9 is a configuration diagram showing a control device of a variable speed pumped storage power generation system according to Embodiment 7 of the present invention.

FIG. 10 is a configuration diagram showing a control device of a variable speed pumped storage power generation system according to Embodiment 7 of the present invention.

FIG. 11 is a configuration diagram showing a control device of a variable speed pumped storage power generation system according to Embodiment 8 of the present invention.

FIG. 12 is a characteristic diagram showing characteristics of a dead zone element.

FIG. 13 is a configuration diagram showing a control device of a variable speed pumped storage power generation system according to Embodiment 9 of the present invention.

FIG. 14 is a configuration diagram illustrating a control device of a variable speed pumped storage power generation system according to Embodiment 9 of the present invention.

FIG. 15 is a configuration diagram showing a control device of a variable speed pumped storage power generation system according to Embodiment 10 of the present invention.

FIG. 16 is a configuration diagram showing a control device of a variable speed pumped storage power generation system according to Embodiment 11 of the present invention.

FIG. 17 is a configuration diagram showing a control device of a variable speed pumped storage power generation system according to Embodiment 11 of the present invention.

FIG. 18 is a configuration diagram showing a control device of a variable speed pumped storage power generation system according to Embodiment 12 of the present invention.

FIG. 19 is a configuration diagram showing a control device of a variable speed pumped storage power generation system according to Embodiment 13 of the present invention.

FIG. 20 is a configuration diagram illustrating a control device of a variable speed pumped storage power generation system according to Embodiment 13 of the present invention.

FIG. 21 is a configuration diagram illustrating a control device of a variable speed pumped storage power generation system according to Embodiment 14 of the present invention.

FIG. 22 is a configuration diagram showing a control device of a variable speed pumped storage power generation system according to Embodiment 15 of the present invention.

FIG. 23 is a configuration diagram showing a control device of a conventional variable speed pumped storage power generation system.

FIG. 24 is an explanatory diagram showing a correspondence relationship between a power command value and an opening command value.

FIG. 25 is an explanatory diagram showing a correspondence relationship between a power command value and a rotation speed command value.

[Explanation of symbols]

11 opening degree command value calculation unit (opening degree calculation means), 12 rotation speed command value calculation unit (rotation speed calculation means), 13 subtractor (generation means), 14 rotation speed controller (generation means),
6, 17 adder (correction means), 18, 19 subtractor (correction means), 20, 21, 22 integral element (correction means), 23, 24, 25 nonlinear gain (correction means),
26, 27, 28 Dead zone elements (correction means), 29, 3
0,31 dead zone width calculator (correction means), 32,34,
36 gain calculator (correction means), 33, 35, 37
Multiplier (correction unit), 38 storage unit (correction amount determination unit), 39 correction amount calculation unit (correction amount determination unit), 40 table change unit (table change unit).

 ──────────────────────────────────────────────────続 き Continued on the front page F term (reference) 3H073 AA12 BB04 BB09 CC06 CC12 CC20 CD03 CD15 CE09 CE27 FF04 5H590 AA21 AA22 AA23 CA12 EA10 EB21 EB29 FA01 GA06 GA10 GB05 HA22 HA24 HA27 JA02 JA04 JA05 JA12 JA15 JB02 JB18

Claims (18)

[Claims] An opening calculating means for calculating a guide vane opening command value from an electric power command value and an effective head of the pump turbine;
A rotation speed calculating means for calculating a rotation speed command value of the pump turbine from the power command value and the effective head of the pump turbine, and a deviation between the rotation speed command value calculated by the rotation speed calculating device and the actual rotation speed of the pump turbine is obtained. Generating means for generating a control signal for eliminating the deviation, adding the control signal generated by the generating means to the opening command value calculated by the opening calculating means, and adding the control signal to the addition result. A control device for a variable-speed pumped-storage power generation system, comprising: a correction unit that adds a value to the value. 2. An opening calculating means for calculating an opening command value of the guide vane from an electric power command value and an effective head of the pump turbine,
A rotation speed calculating means for calculating a rotation speed command value of the pump turbine from the power command value and the effective head of the pump turbine, and a deviation between the rotation speed command value calculated by the rotation speed calculating device and the actual rotation speed of the pump turbine is obtained. Generating means for generating a control signal for eliminating the deviation; adding a deviation between the rotational speed command value and the actual rotational speed of the pump turbine to the opening degree command value calculated by the opening degree calculating means; A control device for a variable-speed pumped-storage power generation system, comprising: a correction unit that adds a control signal generated by the above to the addition result. 3. An opening calculating means for calculating an opening command value of the guide vane from an electric power command value and an effective head of the pump turbine,
A rotation speed calculating means for calculating a rotation speed command value of the pump turbine from the power command value and the effective head of the pump turbine, and a deviation between the rotation speed command value calculated by the rotation speed calculating device and the actual rotation speed of the pump turbine is obtained. Generating means for generating a control signal for eliminating the deviation; and obtaining a difference value between the opening command value calculated by the opening calculating means and the actual opening of the guide vane, and calculating the difference value from the opening command value. And a correcting means for adding the control signal generated by the generating means to the result of the subtraction. 4. The correction means, when adding the control signal generated by the generation means to the opening command value calculated by the opening calculation means, inputs the control signal to the integral element and outputs the control signal from the integral element. The control device for a variable-speed pumped-storage power generation system according to claim 1, wherein the control signal is added to the opening command value. 5. The correction means, when adding the deviation between the rotational speed command value and the actual rotational speed to the opening command value calculated by the opening calculating means, inputs the deviation to an integral element and outputs the deviation from the integral element. 3. The control device according to claim 2, wherein the output deviation is added to the opening command value. 6. The correction means, when subtracting a difference value from the opening command value calculated by the opening calculation means, inputs the difference value to an integral element and opens the difference value output from the integral element. The control device for a variable-speed pumped-storage power generation system according to claim 3, wherein the control unit subtracts from the degree command value. 7. The correction means multiplies the control signal by a constant corresponding to the absolute value of the control signal generated by the generation means, and inputs the multiplied control signal to an integration element. 5. The control device of the variable speed pumped storage power generation system according to 4. 8. The correction means multiplies the deviation by a constant corresponding to the absolute value of the deviation between the rotation speed command value and the actual rotation speed, and inputs the multiplied deviation to an integral element. 6. The control device for a variable speed pumped storage power generation system according to claim 5. 9. The variable speed pumping system according to claim 6, wherein the correction means multiplies the difference value by a constant corresponding to the absolute value of the difference value, and inputs the multiplied difference value to the integration element. Control device for power generation system. 10. The apparatus according to claim 1, wherein the correction means adds the control signal to the opening command value only when the absolute value of the control signal generated by the generation means is larger than an allowable value. The control device for a variable speed pumped storage power generation system according to claim 4 or 7. 11. The method according to claim 2, wherein the correction means adds the deviation to the opening command value only when the absolute value of the deviation between the rotation speed command value and the actual rotation speed is larger than an allowable value. The control device for a variable speed pumped storage power generation system according to claim 5 or 8. 12. The apparatus according to claim 3, wherein the correction means adds the difference value to the opening command value only when the absolute value of the difference value is larger than the allowable value. Of variable speed pumped storage power generation system. 13. The control of the variable speed pumped-storage power generation system according to claim 10, wherein the correction means changes the allowable value in accordance with an operation state of the pump turbine. apparatus. 14. The correction means multiplies the control signal by a constant corresponding to the operating state of the pump turbine when adding the control signal generated by the generation means to the opening command value calculated by the opening calculation means. The control device for a variable-speed pumped-storage power generation system according to claim 1, wherein the multiplied control signal is added to an opening command value. 15. The correction means, when adding the deviation between the rotation speed command value and the actual rotation speed to the opening degree command value calculated by the opening degree calculation means, adds a constant corresponding to the operating state of the pump turbine to the deviation. 3. The control device for a variable-speed pumped-storage power generation system according to claim 2, wherein the multiplication is performed, and a deviation after the multiplication is added to the opening command value. 16. The correction means, when subtracting the difference value from the opening command value calculated by the opening calculation means, multiplies the difference value by a constant corresponding to the operating state of the pump turbine, and calculates the difference after the multiplication. 4. The control device according to claim 3, wherein the value is subtracted from the opening command value. 17. An opening calculating means for calculating a guide vane opening command value from a power command value and an effective head of the pump turbine, and a rotation speed command value of the pump turbine based on the power command value and an effective head of the pump turbine. Rotation speed calculating means, a rotation speed command value calculated by the rotation speed calculation means, a deviation between the actual rotation speed of the pump turbine, and a generation means for generating a control signal for eliminating the deviation; Correction amount determining means for storing the correspondence between the operating state and the correction amount, and determining the correction amount from the current operation state with reference to the correspondence,
Correcting means for adding the correction amount determined by the correction amount determining means to the opening command value calculated by the opening calculating means, and adding the control signal generated by the generating means to the addition result. Control device for the variable speed pumped storage power generation system. 18. An opening calculating means for calculating a guide vane opening command value from an electric power command value and an effective head of the pump turbine, and calculating a rotation speed command value of the pump turbine from the electric power command value and an effective head of the pump turbine. Rotation speed calculating means, a difference between the rotation speed command value calculated by the rotation speed calculation means and the actual rotation speed of the pump turbine, and a generation means for generating a control signal for eliminating the difference, and operation of the pump turbine A table changing means for changing a data table used for calculation by the opening calculating means in accordance with a state; and a control signal generated by the generating means being added to the opening command value calculated by the opening calculating means. A control device for a variable-speed pumped-storage power generation system comprising a correction unit.