JPH09285193A - Variable speed generator motor device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To make it possible to block the deviation of real rotating speed signal from its operating range by outputting zero signal of zero signal output means from switching means when the real rotating speed signal has exceeded a variable speed width upper limit signal and variable speed width lower limit signal. SOLUTION: Comparative means 23 fetches a real rotating speed signal Nr or a slide S, compares a variable speed width upper limit signal of the variable speed width upper limit signal output means 24 determining the boundary range predetermined at the inner side of the operating variable speed range to the variable speed width lower limit signal of the variable speed width lower limit signal output means 25 respectively, and outputs a switching signal when the real rotating speed signal Nr or slide S has reached the variable speed width upper limit signal or the variable speed width lower limit signal. Then Δf signal is zeroed and outputted to governor free compensating operation means. By doing this, the deviation of the real rotating speed signal from the operation range can be blocked and the instability of effective power or real rotating speed signal can be avoided.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a variable speed generator-motor apparatus which excites the secondary side of a wire wound induction machine with an alternating current and connects the primary side to a system.

[0002]

2. Description of the Related Art A conventional pumped-storage power plant uses a synchronous machine as a generator motor. Therefore, during the power generation operation, the guide vane opening is also determined if the required active power and the head are determined, but the constant rotation speed based on the synchronous speed is not always efficient for the pump turbine. Also, during pumping operation,
If the pump head is decided, the input becomes constant and there is a problem that the active power cannot be adjusted.

A variable speed pumped storage power generation system uses a wire wound induction machine as a generator motor, detects a phase and a rotation speed of a rotor, and excites a secondary side of the wire wound induction machine with a low-frequency alternating current. By controlling the output of the converter, it is a system that can always synchronize the primary side with the system even if the rotor of the wire wound induction machine is not at the synchronous speed.

In the present system, the relationship between active power, guide vane opening, and rotation speed can be manipulated so that the pump turbine always operates with high efficiency during power generation operation. Further, during the pumping operation, the active power changes with the cube of the rotation speed, so the active power can be adjusted by changing the rotation speed. Furthermore, by transforming the three-phase AC into a rectangular coordinate system, the torque component (active power, component related to rotation speed) and excitation component (reactive power, reactive power, It has the feature that it can control independently the component related to voltage).

FIG. 19 is a configuration diagram of a conventional variable speed generator-motor apparatus used in the variable speed pumped storage power generation system described above.

The generator motor 1 comprises a stator winding 1a which is a primary winding and a rotor winding 1b which is a secondary winding. The stator winding 1a passes from a main circuit 2 through a circuit breaker 3. While connected to the system 4, the rotor winding 1b is connected to the pump turbine 5. The primary side of the frequency converter 6 is connected to the main circuit 2, the secondary side of the frequency converter 6 is connected to the rotor winding 1b, and the speed slip detector 7 is connected to the rotor winding 1b. .

In the variable speed generator / motor 10, first, Δf
The detection unit 11 calculates the deviation between the frequency f of the system 4 and the reference frequency fs based on the voltage of the system 4, and outputs the obtained frequency fluctuation signal Δf to the governor-free compensation calculation unit 12.

Next, the governor-free compensation calculation means 12
As shown in FIG. 22, the adjustment rate 12a and each function 12b-12
e is set, a predetermined calculation is performed based on the frequency fluctuation signal Δf to obtain a compensation signal that makes the frequency fluctuation signal Δf zero, and an active power compensation signal, a rotation speed compensation signal,
A torque component current compensation signal and a guide vane opening compensation signal are generated respectively. Then, the active power compensation signal from the governor-free compensation calculation means 12 is input to the addition means 13, and the active power command signal Pa obtained by adding to the active power target signal P by the addition means 13 is used as a high efficiency function / active power. Input to the control means 14.

In the high efficiency function / active power control means 14,
A rotation speed target signal and a guide vane opening target signal are calculated from the active power command signal Pa and the drop signal H. The rotation speed target signal is the rotation speed command signal Na obtained by adding the rotation speed compensation signal and the addition means 15, and the actual rotation speed signal Nr or the slip signal S detected by the speed slip detector 7 is shown by the addition means 16. The deviation signal obtained by adding the sign is the velocity slip control means 1
7 is input.

By the way, the slip signal S is obtained by the following equation.

S = (f1-fr) / f1, where f1: system frequency fr: actual rotation frequency

In the speed slip control means 17, the addition means 1
The torque component current target signal is output so that the deviation signal from 6 becomes zero, that is, the actual rotation speed signal Nr or the slip S follows the rotation speed command signal Na. Next, the torque component current target signal and the torque component current compensation signal from the governor-free compensation calculation means 12 are added together by the addition means 18
Torque component current command signal ig obtained by adding
a is output to the current control unit 19. Then, the current control means 19 controls the frequency converter 6 according to the torque component current command signal iga to increase / decrease the torque component current of the AC excitation supplied to the rotor winding 1b.

On the other hand, high efficiency function / active power control means 14
The guide vane opening command signal GVa obtained by adding the guide vane opening target signal from the guide vane opening compensation signal and the guide vane opening compensation signal by the adding means 20 is the guide vane control means 21.
The guide vane control means 21 controls the opening and closing of the guide vanes 8.

With the above structure, the active power can be controlled as the target value as the variable speed system, and the active power can be output in the direction to suppress the frequency fluctuation of the system while always maintaining a highly efficient state for the pump turbine. .

[0015]

By the way, in the conventional variable speed generator-motor apparatus 10 shown in FIG. 19, when the system is operating near the boundary of the operable range of the system, the governor-free compensation calculation means 12 causes the effective power. ,Rotational speed,
If the torque component current and the guide vane opening are corrected, there is a possibility that the system may deviate from the operable range.
Examples of this range include a limit of the actual rotation speed signal Nr or the slip S (variable speed range: an operating range determined by the ability of the frequency converter) and a limit of active power (an operating range determined by the characteristics of the pump turbine).

For example, in the case of active power, as shown in FIG. 20, it becomes a function of the active power signal P with respect to the head signal H during power generation, and when the head signal H1 is active power P2 to P1 is the operating range. Further, at the time of pumping, as shown in FIG. 21, the active power signal P becomes a function of the head H and the rotation speed Nr. For example, when the variable speed range from the rotation speed N1 to the rotation speed N2 is set, The operating range is up to active power P3. The actual rotation speed signal Nr is generally considered to be about ± 5% of the synchronous speed Ns.

If the actual rotation speed signal Nr deviates from the operable range, the output voltage of the frequency converter 6 cannot overcome the voltage induced on the secondary side of the generator motor 1 and a stable current is supplied. It cannot be poured into the system, and the active power and the rotation speed of the system fluctuate greatly and become unstable. Further, if the effective power is out of the operable range, the system may be damaged due to excessive vibration of the pump turbine or damage to the turbine surface due to cavitation.

Therefore, according to the present invention, even if the active power, the rotational speed, the torque component current, and the guide vane opening are compensated by the governor-free compensation calculation means, the system can be operated stably without departing from the operable range. An object is to provide a variable speed generator-motor device.

[0019]

According to a first aspect of the present invention, a primary winding is connected to a power system and a secondary winding is AC-excited, and a rotary shaft of the linear induction generator motor. In a variable-speed generator-motor device composed of a prime mover / load coupled to the power source, a slip detection means for detecting slip of AC excitation based on the frequency of the power system and the actual rotation speed of the rotating shaft, and the active power command and the drop Based on the function generating means for calculating and outputting the slip command and the guide vane command on the basis of the frequency fluctuation signal of the electric power system, while calculating and outputting the compensation signal for bringing the primary side frequency of the wound induction generator motor close to the reference frequency, When the slip reaches the variable speed operation limit range, compensation calculation means for calculating and outputting a compensation signal for preventing deviation of the slip from the variable speed operation limit range, a slip command and a compensation signal A slip control means for calculating and outputting a torque current command based on the slip, an AC excitation control means for controlling AC excitation based on the torque current command, and a guide vane for controlling the guide vane based on the guide vane command. And a control means. According to the above means, when the slip reaches the variable speed operation limit range,
A predetermined compensation signal is output to the slip control means. This prevents the slip from deviating from the variable speed operation limit range, and prevents the slip from becoming unstable.

According to a second aspect of the present invention, a primary winding is connected to a power system and a secondary winding is AC-excited, and a winding type induction generator motor and a prime mover connected to a rotary shaft of the winding type induction generator motor. In a variable-speed generator-motor device consisting of a load, a slip detection means for detecting the slip of AC excitation based on the frequency of the power system and the actual rotation speed of the rotating shaft, and a slip command and a guide slip based on the active power command and the head. -A function generating means for calculating and outputting a command, and a compensating signal for calculating the primary frequency of the wound-rotor induction generator motor close to the reference frequency based on the frequency fluctuation signal of the power system are calculated and output. When the range is reached, the compensation calculation means for calculating and outputting the compensation signal to prevent the slip from deviating from the variable speed operation limit range, and the torque current based on the slip command and the slip A slip control means for calculating and outputting a command, an AC excitation control means for controlling AC excitation based on a torque current command, and a guide vane control means for controlling a guide vane based on a guide vane command and a compensation signal. To have. According to the above means, a predetermined compensation signal is output to the guide vane control means when the slip reaches the variable speed operation limit range. by this,
It is possible to prevent the slip from deviating from the variable speed operation limit range, and to prevent the slip from becoming unstable.

According to a third aspect of the present invention, a primary winding is connected to an electric power system and a secondary winding is AC-excited, and a winding type induction generator motor and a prime mover connected to a rotary shaft of the winding type induction generator motor. In a variable-speed generator-motor device composed of a load, slip detection means for detecting slip of AC excitation based on the frequency of the power system and the actual rotation speed of the rotating shaft, and wound-type induction power generation based on the frequency fluctuation signal of the power system. While outputting the compensation signal to bring the primary side frequency of the motor closer to the reference frequency, when the slip reaches the variable speed operation limit range, the compensation signal that prevents deviation from the variable speed operation limit range is output. Compensation calculation means for calculating and outputting, function generating means for calculating and outputting a slip command and a guide vane command based on the active power command corrected by the compensation signal and the head, and a slip command. The slip control means for calculating and outputting the torque current command based on the torque, the AC excitation control means for controlling the AC excitation based on the torque current command, and the guide vane controlling the guide vane based on the guide vane command And a control means. According to the above means, when the slip reaches the variable speed operation limit range,
A predetermined compensation signal compensates the active power command. This prevents the slip from deviating from the variable speed operation limit range, and prevents the slip from becoming unstable.

According to a fourth aspect of the present invention, a primary winding is connected to an electric power system and a secondary winding is AC-excited, and a winding type induction generator motor and a prime mover / motor connected to a rotary shaft of the winding type induction generator motor. In a variable-speed generator-motor device consisting of a load, a slip detection means for detecting the slip of AC excitation based on the frequency of the power system and the actual rotation speed of the rotating shaft, and a slip command and a guide slip based on the active power command and the head. A function generator that calculates and outputs a single command and a compensation signal that makes the primary frequency of the wound-rotor induction generator motor closer to the reference frequency based on the frequency fluctuation signal of the power system are calculated and output. When the range is reached, the compensation calculation means for calculating and outputting the compensation signal that prevents the slip from deviating from the variable speed operation limit range, and the torque current instruction based on the slip command and the slip. And slip control means for calculating output,
An alternating current excitation control means for controlling alternating current excitation based on the torque current command and the compensation signal, and a guide vane control means for controlling the guide vane based on the guide vane command are provided. According to the above means, the predetermined compensation signal compensates the torque current command when the slip reaches the variable speed operation limit range. This prevents the slip from deviating from the variable speed operation limit range, and prevents the slip from becoming unstable.

According to a fifth aspect of the present invention, a primary winding is connected to an electric power system and a secondary winding is AC-excited, and a winding type induction generator motor and a prime mover connected to a rotary shaft of the winding type induction generator motor. In a variable speed generator-motor device composed of a load, speed detection means for detecting an actual rotation speed of a rotary shaft, and function generation means for calculating and outputting a speed command and a guide vane command based on an active power command and a head. , Computation signal is output based on the frequency fluctuation signal of the power system to bring the primary side frequency of the wound-rotor induction generator motor close to the reference frequency, while the actual rotation speed reaches the variable speed operation limit range. Compensation calculation means for calculating and outputting a compensation signal for preventing deviation of the rotation speed from the variable speed operation limit range, and speed control for calculating and outputting a torque current command based on the speed command, the compensation signal and the actual rotation speed. Is obtained so as to have a controlling guide base Ichin based on emission command Guide vane Ichin control unit - with the step, an AC excitation control means for controlling the AC excitation on the basis of the torque current command, Guide vane. According to the above means, when the actual rotation speed reaches the variable speed operation limit range, the predetermined compensation signal is output to the speed control means that creates the torque current command. As a result, it is possible to prevent the actual rotation speed from deviating from the variable speed operation limit range and prevent the actual rotation speed from becoming unstable.

According to a sixth aspect of the present invention, a primary winding is connected to a power system and a secondary winding is AC-excited, and a winding type induction generator motor and a prime mover connected to a rotary shaft of the winding type induction generator motor. In a variable-speed generator-motor device composed of a load, speed detection means for detecting an actual rotation speed of a rotary shaft, and function generation means for calculating and outputting a speed command and a guide vane command based on an active power command and a head. , Computation signal for making the primary frequency of the wound-rotor induction motor close to the reference frequency is calculated and output based on the frequency fluctuation signal of the electric power system, and when the variable speed operation limit range of the actual rotation speed is reached, Compensation calculation means for calculating and outputting a compensation signal for preventing deviation of the rotation speed from the variable speed operation limit range; speed control means for calculating and outputting a torque current command based on the speed command and the actual rotation speed; An AC excitation control means for controlling the AC excitation on the basis of the leakage current command, Guide vane - is obtained so as to have a controlling guide base Ichin based on emission command and the compensation signal Guide vane Ichin control means. According to the above means, when the actual rotation speed reaches the variable speed operation limit range, the predetermined compensation signal is output to the guide vane control means for controlling the guide vanes. As a result, it is possible to prevent the actual rotation speed from deviating from the variable speed operation limit range and prevent the actual rotation speed from becoming unstable.

According to a seventh aspect of the present invention, a primary winding is connected to a power system and a secondary winding is AC-excited, and a winding type induction generator motor and a prime mover connected to a rotary shaft of the winding type induction generator motor. In a variable-speed generator-motor device composed of a load, in order to bring the primary side frequency of the wound-rotor induction generator motor closer to the reference frequency based on the speed detection means for detecting the actual rotation speed of the rotating shaft and the frequency fluctuation signal of the power system. And outputs a compensation signal for preventing the deviation of the actual rotation speed from the variable speed operation limit range when the actual rotation speed reaches the variable speed operation limit range. , Function generating means for calculating and outputting the speed command and guide vane command based on the active power command corrected by the compensation signal and the head, and the torque current command is calculated based on the speed command and the actual rotation speed. Speed control means, AC excitation control means for controlling AC excitation based on the torque current command, and guide vane control means for controlling the guide vane based on the guide vane command. is there. According to the above means, the predetermined compensation signal compensates the active power command when the actual rotation speed reaches the variable speed operation limit range. As a result, it is possible to prevent the actual rotation speed from deviating from the variable speed operation limit range and prevent the actual rotation speed from becoming unstable.

According to an eighth aspect of the present invention, a primary winding is connected to an electric power system and a secondary winding is AC-excited, and a winding type induction generator motor, and a prime mover connected to a rotary shaft of the winding type induction generator motor. In a variable speed generator-motor device composed of a load, speed detection means for detecting an actual rotation speed of a rotary shaft, and function generation means for calculating and outputting a speed command and a guide vane command based on an active power command and a head. , Computation signal is output based on the frequency fluctuation signal of the power system to bring the primary side frequency of the wound-rotor induction generator motor close to the reference frequency, while the actual rotation speed reaches the variable speed operation limit range. Compensation calculation means for calculating and outputting a compensation signal for preventing deviation of the rotation speed from the variable speed operation limit range; speed control means for calculating and outputting a torque current command based on the speed command and the actual rotation speed; An AC excitation control means for controlling the AC excitation on the basis of the current command and the compensation signal, Guide vane - is obtained so as to have a controlling guide base Ichin based on emission command Guide vane Ichin control means. According to the above means, when the actual rotation speed reaches the variable speed operation limit range, the predetermined compensation signal is output to the AC excitation control means for controlling the AC excitation. As a result, it is possible to prevent the actual rotation speed from deviating from the variable speed operation limit range and prevent the actual rotation speed from becoming unstable.

The invention of claim 9 is the invention of claims 1 to 4.
In any one of the variable speed generator-motor apparatus described above, the compensation calculation means calculates and outputs a compensation signal for bringing the primary side frequency of the wound-rotor induction generator motor close to the reference frequency based on the frequency fluctuation signal of the power system, while slipping. Instead of this, when the active power supplied to the power system reaches the variable speed operation limit range, a compensation signal for preventing deviation of the active power from the variable speed operation limit range is arithmetically output. According to the above means, when the active power reaches the variable speed operation limit range, the predetermined compensation signal is output to any of the slip control means, the guide vane control means, the function generation means, and the AC excitation control means. . As a result, it is possible to prevent the active power from deviating from the variable speed operation limit range and prevent the active power from becoming unstable.

According to a tenth aspect of the present invention, in the variable speed generator-motor apparatus according to any one of the fifth to eighth aspects, the compensation calculation means is based on a frequency fluctuation signal of the power system, and the primary side of the wire wound induction generator-motor is used. While outputting the compensation signal to bring the frequency closer to the reference frequency, when the active power supplied to the power system instead of the actual rotation speed reaches the variable speed operation limit range, the active power variable speed operation limit range The compensation signal for preventing deviation from is calculated and output. According to the above means, when the active power reaches the variable speed operation limit range, a predetermined compensation signal is output to any of the speed control means, the guide vane control means, the function generation means, and the AC excitation control means. . As a result, it is possible to prevent the active power from deviating from the variable speed operation limit range and prevent the active power from becoming unstable.

According to an eleventh aspect of the present invention, in the variable speed generator-motor apparatus according to any one of the first to fourth aspects, the compensation calculation means determines when the slip reaches a predetermined variable speed operation limit range. While changing the frequency fluctuation signal to the zero signal by limiting it with the change rate of 0, when the slip enters inside the variable speed operation limit range, it is limited by the predetermined change rate and the zero signal is changed to the frequency changing signal. It was done.
According to the above means, the compensation signal is limited at a predetermined change rate, so that the compensation signal can smoothly change and the slip can be stably changed without sudden change.

According to a twelfth aspect of the present invention, in the variable speed generator-motor apparatus according to any one of the first to fourth aspects, the compensation calculation means further includes an inner boundary range inside the variable speed operation limit range. When the slip reaches the variable speed operation limit range, the gain signal is output as zero, and when the slip is between the variable speed operation limit range and the inner boundary range, the gain signal is increased and output as it goes inward. A variable gain calculating means for outputting a gain signal as 1 when the slip enters the inner boundary range and a multiplying means for making a signal obtained by multiplying the frequency fluctuation signal by the gain signal a compensation signal are provided. It is a thing. According to the above means, since the variable gain is set in the vicinity of the variable speed operation limit range, it is possible to smoothly increase / decrease the compensation signal without causing a sudden change in the compensation signal and to quickly normalize the slip.

According to a thirteenth aspect of the present invention, in the variable speed generator-motor apparatus according to any one of the first to fourth aspects, the compensation calculation means sets an upper limit and a lower limit when the slip is within a variable speed operation limit range. Each set to a predetermined value, and when the slip reaches the variable speed operation limit range, setting means that sets the upper limit or lower limit of the corresponding side to zero, and the frequency fluctuation signal is the range between the upper limit and the lower limit. When the frequency fluctuation signal is out of the range between the upper limit and the lower limit, the limiter that outputs the frequency fluctuation signal as the compensation signal when the frequency fluctuation signal is out of the upper and lower limits is provided. It is a thing. According to the above means,
Since only one of the limiters is set to zero, the slip can be quickly restored.

According to a fourteenth aspect of the present invention, in the variable speed generator-motor apparatus according to any one of the first to fourth aspects, the compensation calculation means has an upper limit on the corresponding side when the slip reaches the variable speed operation limit range. If a means for outputting a hold signal or a lower limit hold signal and an upper limit hold signal are input, Δf
A limiter is provided so that the signal is limited to the upper limit value or less to be the compensation signal, while the lower limit hold signal is input to limit the Δf signal to be the lower limit value or more to be the compensation signal. It is a thing. According to the above means, since only one of the limiters is set to the predetermined value, the slip can be quickly restored.

According to a fifteenth aspect of the present invention, in the variable speed generator-motor apparatus according to any one of the fifth to eighth aspects, the compensation calculation means has the actual rotation speed signal reaching a predetermined variable speed operation limit range. When the actual rotation speed signal goes inward from the variable speed operation limit range, the frequency fluctuation signal is shifted to the zero signal by limiting it at a predetermined rate of change. It is designed to shift to a signal. According to the above means, the compensation signal is limited at a predetermined change rate, so that the actual rotation speed signal can be stably changed without a sudden change in the compensation signal.

According to a sixteenth aspect of the present invention, in the variable speed generator-motor apparatus according to any one of the fifth to eighth aspects, the compensation calculation means further comprises an inner boundary range inside the variable speed operation limit range. Then, when the actual rotation speed signal reaches the variable speed operation limit range, the gain signal is output as zero, while when the actual rotation speed signal is between the variable speed operation limit range and the inner boundary range, the gain increases as it goes inward. A variable gain calculating means for increasing and outputting the signal and outputting the gain signal as 1 when the actual rotation speed signal enters the inner boundary range, and a signal obtained by multiplying the frequency fluctuation signal by the gain signal as a compensation signal. The multiplication means is provided. According to the above means, since the variable gain is set in the vicinity of the variable speed operation limit range, the compensation signal does not suddenly change and the compensation signal is smoothly increased / decreased to quickly make the actual rotation speed signal normal. You can

According to a seventeenth aspect of the present invention, in the variable speed generator-motor apparatus according to any one of the fifth to eighth aspects, the compensating calculation means sets an upper limit and an upper limit when the actual rotation speed signal is within the variable speed operation limit range. While the lower limit is set to a predetermined value, setting means for setting the upper limit or lower limit of the corresponding side to zero when the actual rotation speed signal reaches the variable speed operation limit range, and the frequency fluctuation signal is set to the upper limit. Limiter that outputs the frequency fluctuation signal as a compensation signal when it is within the range between the lower limit and the lower limit, and outputs it as the compensation signal when the frequency fluctuation signal is outside the range between the upper limit and the lower limit. And are provided. According to the above means, only one of the limiters is set to zero, so that the actual rotation speed signal can be quickly returned.

According to an eighteenth aspect of the present invention, in the variable speed generator-motor apparatus according to any one of the fifth to eighth aspects, the compensation calculation means responds when the actual rotation speed signal reaches the variable speed operation limit range. Means for outputting the upper limit hold signal or the lower limit hold signal, and when the upper limit hold signal is input, the Δf signal is limited so as to be equal to or less than the upper limit limit value to be a compensation signal, while when the lower limit hold signal is input, the Δf signal is changed. A limiter for limiting the value to be equal to or higher than the lower limit value and using it as a compensation signal is provided. According to the above means, since only one of the limiters is set to the predetermined value, the actual rotation speed signal can be quickly returned.

According to a nineteenth aspect of the present invention, in the variable speed generator-motor apparatus according to the ninth or tenth aspect, the compensation calculation means determines when the active power signal reaches a predetermined variable speed operation limit range. While changing the frequency fluctuation signal to the zero signal by limiting it with the rate of change, when the active power signal goes inward from the variable speed operation limit range, limit it with the predetermined rate of change and shifting from the zero signal to the frequency changing signal. It is the one. According to the above means, the compensation signal is limited at a predetermined change rate, so that the active power signal can be stably changed without a sudden change and sudden change.

According to a twentieth aspect of the invention, in the variable speed generator-motor apparatus according to the ninth or tenth aspect, the compensation calculation means is effective by providing an inner boundary range inside the variable speed operation limit range. When the power signal reaches the variable speed operation limit range, the gain signal is output as a zero signal, and when the active power signal is between the variable speed operation limit range and the inner boundary range, the gain signal is increased as it goes inward. Variable gain calculating means for outputting the gain signal as 1 when the active power signal enters the inner boundary range,
A multiplication means for providing a signal obtained by multiplying the frequency fluctuation signal by the gain signal as a compensation signal is provided. According to the above means, since the variable gain is set in the vicinity of the variable speed operation limit range, it is possible to smoothly increase or decrease the compensation signal without causing a sudden change in the compensation signal and quickly normalize the active power signal. it can.

According to a twenty-first aspect of the present invention, in the variable speed generator-motor apparatus according to the ninth or tenth aspect, the compensation calculation means sets an upper limit and a lower limit, respectively, when the active power signal is within the variable speed operation limit range. While setting to a predetermined value, setting means for setting the upper limit or lower limit of the corresponding side to zero signal when the active power signal reaches the variable speed operation limit range, and the frequency fluctuation signal has the upper limit and the lower limit. While the frequency fluctuation signal is output as the compensation signal when it is within the range, a limiter is provided that is limited to the upper limit or the lower limit when the frequency fluctuation signal is out of the upper limit and lower limit limits and outputs as the compensation signal. That is what I did. According to the above means, since only one of the limiters is set to zero,
The active power signal can be returned quickly.

According to a twenty-second aspect of the present invention, in the variable speed generator-motor apparatus according to the ninth or tenth aspect, the compensating operation means holds the upper limit of the corresponding side when the active power signal reaches the variable speed operation limit range. Δf when inputting a signal or a lower limit hold signal and an upper limit hold signal
A limiter is provided so that the signal is limited to the upper limit value or less to be the compensation signal, while the lower limit hold signal is input to limit the Δf signal to be the lower limit value or more to be the compensation signal. That is. According to the above means, since only one of the limiters is set to the predetermined value, the active power signal can be quickly returned.

[0041]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 shows the first to fifth embodiments of the present invention.
FIG. 20 is a configuration diagram of a variable speed pumped storage hydropower system applied to the embodiment. The main point in FIG. 1 different from FIG. 19 showing a conventional example is that Δf is present between the Δf detection means 11 and the governor-free compensation calculation means 12. A signal correcting means 22 is additionally provided, and it is determined based on the actual rotation speed signal Nr or the slip S whether or not it is within the operable range, and the deviation of the actual rotation speed signal Nr or the slip S from the operable range is prevented. That is, the data is output to the governor-free compensation calculation means 12.

FIG. 2 is a block diagram of the Δf signal correction means provided in the variable speed generator-motor apparatus 10A according to the first embodiment of the present invention. The Δf signal correction means 22A is a comparison means 2.
3, variable speed upper limit signal output means 24, variable speed lower limit signal output means 25, zero signal output means 26, and switching means 27.

Here, the comparing means 23 takes in the actual rotation speed signal Nr or the slip S, and sets the variable speed upper limit signal output means 24 of the variable speed upper limit signal output means 24 for defining a predetermined boundary range inside the operable variable speed range. When the actual rotation speed signal Nr or the slip S reaches the variable speed upper limit signal H or the variable speed lower limit signal L by comparing with the signal H and the variable speed lower limit signal L of the variable speed lower limit signal output means 25, respectively. It outputs a switching signal.

The switching means 27 receives the Δf signal and contacts 2
While outputting as it is as a Δf correction signal via 7b, when the switching signal is input from the comparison means 23, the zero signal from the zero signal output means 26 is output via the contact 27a.

With the above configuration, the operation will be described with reference to the operation diagram shown in FIG. 3. As shown in the upper part of the drawing, the actual rotation speed signal Nr changes with respect to the synchronous speed signal Ns, and the actual rotation speed is increased before time t1. The speed signal Nr is within the boundaries of the variable speed range upper limit signal H and the variable speed range lower limit signal L, which are the boundary ranges, and the Δf signal is directly transmitted via the contact point 27b of the switching means 27 as the Δf correction signal to the governor-free compensation calculation means 12 Is output to. In this case, the system frequency is controlled to be the reference frequency signal as described in the related art.

After that, at time t1, the actual rotation speed signal Nr reaches the lower limit side of the variable speed range lower limit signal L. At this time, the switching signal is output from the comparison means 23 to the switching means 27, the contact 27b is opened and the contact 27a is closed, and as a result, the zero signal is output from the zero signal output means 26 as the Δf correction signal and the governor-free compensation calculation means 12 is obtained. Is output to. As a result, it is possible to prevent each compensation signal from the governor-free compensation calculation means 12 from being output as zero and the actual rotation speed signal Nr from deviating from the operable boundary range.

Further, at time t2, the actual rotation speed signal Nr falls within the range between the variable speed range lower limit signal L and the variable speed range upper limit signal H, and the Δf signal remains as Δf through the contact 27b.
It is output as a correction signal. Then, at time t3, the actual rotation speed signal Nr reaches the variable speed range upper limit signal H.
In this case, the comparison unit 23 outputs a switching signal to the switching unit 27, the contact 27a is closed, and the zero signal output unit 2 is again provided.
A zero signal is output from 6 as the Δf correction signal via the contact 27a.

In the governor-free compensation calculation means 12 to which the zero signal is input, each compensation signal is output as zero, and it is possible to prevent the actual rotation speed signal Nr from deviating from the operable boundary range. As a result, at time t4, the actual rotation speed signal Nr becomes equal to or lower than the variable speed range upper limit signal H again.

As described above, according to the first embodiment of the present invention, when the actual rotation speed signal Nr reaches the boundary range of the variable speed range upper limit signal H or the variable speed range lower limit signal L, the Δf signal is set to zero. Since the output is output to the governor-free compensation calculation means 12, it is possible to prevent the actual rotation speed signal Nr from deviating from the operable boundary range, and to prevent the active power and the actual rotation speed signal Nr from becoming unstable. You can

FIG. 4 is a block diagram of the Δf signal correction means provided in the variable speed generator-motor apparatus according to the second embodiment of the present invention. The Δf signal correction means 22B is a comparison means 23 and a variable speed upper limit. The signal output means 24, the variable speed lower limit signal output means 25, the zero signal output means 26, the switching means 27, and the rate limiter 28 are provided, and the feature is that the rate limiter 28 is provided.

The rate limiter 28 outputs the Δf signal or the zero signal from the switching means 27 to the governor-free compensation calculation means 12 while limiting the Δf signal or the zero signal at a predetermined change rate.

With the above configuration, the operation will be described with reference to the operation diagram shown in FIG. 5. As shown in the upper part of the figure, the actual rotation speed signal Nr changes with respect to the synchronous speed signal Ns, and the actual rotation speed is increased before time t1. The speed signal Nr is within the range of the variable speed range upper limit signal H and the variable speed range lower limit signal L, and the Δf signal is the switching means 2.
It is directly output to the governor-free compensation calculation means 12 as the Δf correction signal via the contact 27b of No. 7.

Thereafter, at time t1, the actual rotation speed signal Nr reaches the lower limit side of the variable speed range lower limit signal L. At this time, the switching signal is output from the comparison means 23 to the switching means 27, the contact 27b is opened and the contact 27a is closed, and as a result, the zero signal is outputted from the zero signal output means 26 as the Δf correction signal via the contact 27a. It is output to the limiter 28.

The rate limiter 28 outputs a Δf correction signal for gradually shifting the Δf signal at time t1 to a zero signal as shown in the figure. Further, similarly, at time t2 and time t
3. At time t4, the rate limiter 28 operates to output the Δf correction signal with a predetermined change rate.

FIG. 6 is a block diagram of the Δf signal correction means provided in the variable speed generator-motor apparatus according to the third embodiment of the present invention. The Δf signal correction means 22C is a variable gain calculation means 30 and a multiplication means. It is composed of 31 and.

Here, the variable gain calculation means 30 makes zero outside the variable speed upper and lower limits (points A and B) with respect to the actual rotation speed signal Nr or the slip S, and gradually increases to gain 1 when going inward. The function is set so that a gain signal having a gain of 1 is output when the position approaches (points C and D). The multiplying means 31 outputs a Δf correction signal obtained by multiplying the Δf signal by the gain signal from the variable gain computing means 30.

With the above configuration, first, referring to FIG. 7, the actual rotation speed signal Nr or the slip S is taken into the variable gain calculation means 30, and before the time t1, the actual rotation speed signal Nr is D. The gain signal 1 that is larger than the value of the point is output from the variable gain calculation means 30. The gain signal 1 is multiplied by the Δf signal by the multiplication means 31 and output as a Δf correction signal. Thereafter, at time t1, the actual rotation speed signal Nr becomes equal to or lower than the value at the point D, the function is set, the gain signal is input to the multiplication means 31, and the gain signal is multiplied by the Δf signal and output as the Δf correction signal.

Next, at time t2, the actual rotation speed signal Nr becomes equal to or less than the value at the point B, the variable gain calculation means 30 outputs the gain signal 0, and the multiplication means 31 outputs the Δf correction signal 0. . Eventually, when the actual rotation speed signal Nr rises to reach the value at point B at time t3, the gain signal from the variable gain calculation means 30 is output so as to gradually increase from 0, and the Δf correction signal from the multiplication means 31 is output. Gradually increases from 0. When the actual rotation speed signal Nr reaches the value at the point D at time t4, the gain signal 1 is output from the variable gain computing means 30, and the Δf signal is output from the multiplying means 31 as the Δf correction signal. In addition, C point on the upper limit side,
The same applies to point A.

As described above, according to the third embodiment, when the actual rotation speed signal Nr reaches the boundary range, the Δf correction signal is output as zero, while the actual rotation speed signal Nr is a predetermined value inside the boundary range. In the range, the Δf correction signal is gradually increased from zero, and the actual rotation speed signal Nr is changed to the synchronous speed signal N.
In the range close to s, the Δf signal is output as it is as the Δf correction signal. Therefore, the Δf correction signal can be stably changed without sudden change, and further, it does not deviate from the operable variable speed range.

FIG. 8 is a block diagram of the Δf signal correction means provided in the variable speed generator-motor apparatus according to the fourth embodiment of the present invention. The Δf signal correction means 22D is the upper limit comparison means 32.
And variable speed upper limit signal output means 33, Δf upper limit signal output means 34, zero signal output means 35 and upper limit side switching means 36, and further lower limit comparison means 37, variable speed lower limit signal output means 38 and Δf lower limit. It comprises a signal output means 39, a zero signal output means 40, a lower limit side switching means 41 and a limiter 42.

The upper limit comparing means 32 outputs a switching signal when the actual rotation speed signal Nr becomes the variable speed upper limit signal H from the variable speed upper limit signal output means 33. The upper limit switching means 36 includes the Δf upper limit signal output means 34.
The limiter 42 using the Δf upper limit signal from
On the other hand, when the switching signal is input, the zero signal output means 35 sets the zero signal in the limiter 42 as the upper limit.

The lower limit comparing means 37 determines the actual rotation speed signal Nr.
When the variable speed lower limit signal output means 38 becomes the variable speed lower limit signal L, a switching signal is output. The lower limit side switching means 41 uses the Δ from the Δf lower limit signal output means 39.
While the f lower limit signal is set in the limiter 42 as the lower limit, when the switching signal is input, the zero signal output unit 40 sets the zero signal in the limiter 42 as the lower limit.

The limiter 42 outputs the Δf correction signal as it is when the Δf signal is within the range between the upper limit and the lower limit, and outputs the upper limit or the lower limit when the Δf signal deviates from the range between the upper limit and the lower limit. It is limited and outputs the Δf correction signal.

With the above configuration, referring to FIG. 9, when the actual rotation speed signal Nr becomes the variable speed range lower limit signal L at time t1, a switching signal is output from the lower limit comparison means 37 to the lower limit side switching means 41. To be done. In this case, the contact 41a of the lower limit switching means 41 is closed, and the zero signal from the zero signal output means 40 is set in the limiter 42 as the lower limit. As a result, the Δf signal is limited by the limiter 42, and when the Δf signal is less than or equal to zero, a zero signal is output and Δf
When the signal is 0 or more, the Δf correction signal is output as it is.

After that, when the actual rotation speed signal Nr becomes the variable speed range lower limit signal L at time t2, the output of the switching signal from the lower limit comparison means 37 is stopped, and the Δf lower limit signal is sent to the limiter 42 via the contact 41b. Is set as.
As a result, the Δf signal is directly transmitted through the limiter 42 by Δ.
It is output as an f correction signal.

Further, when the actual rotation speed signal Nr becomes the variable speed upper limit signal H at the time t3, the upper limit comparing means 32 outputs the switching signal to the upper limit side switching means 36. In this case, the zero signal is set to the upper limit of the limiter 42 via the contact 36a of the upper limit switching means 36. As a result, the upper limit of the Δf signal is limited to zero by the limiter 42 and a Δf correction signal of zero is output, while the Δf signal is output as it is when the Δf signal is zero or less. At time t4 thereafter, the actual rotation speed signal Nr becomes equal to or less than the variable speed range upper limit signal H, and the Δf signal is output as it is as the Δf correction signal.

As described above, according to the fourth embodiment of the present invention, when the actual rotation speed signal Nr reaches the upper limit of the boundary range, only the upper limit limiter is set to zero, so that the Δf signal becomes zero or less. Is not limited to zero, and when the actual rotation speed signal Nr reaches the lower limit of the boundary range, only the lower limit limiter is set to zero, so that the Δf signal becomes zero even if the Δf signal becomes zero or more. Not limited. As described above, the actual rotation speed signal Nr does not fall outside the operable boundary range.

FIG. 10 is a block diagram of the Δf signal correction means provided in the variable speed generator-motor apparatus according to the fifth embodiment of the present invention. The Δf signal correction means 22E is the upper limit comparison means 4
5, variable speed upper limit signal output means 46, upper limit holding means 47, lower limit comparison means 48 and variable speed lower limit signal output means 4
9, lower limit holding means 50 and limit means 51.

Here, the upper limit comparison means 45 outputs an upper limit hold signal to the upper limit hold means 47 when the actual rotation speed signal Nr is equal to or higher than the variable speed range upper limit signal H from the variable speed range upper limit signal output means 46. is there. Lower limit comparison means 48
Means that the actual rotation speed signal Nr is a variable speed range lower limit signal output means 4
When the variable speed range lower limit signal L from 9 is less than or equal to the variable speed limit lower limit signal L, the lower limit hold signal is output to the lower limit hold means 50. The limit means 51 holds and outputs the Δf signal at the upper limit value when the upper limit hold means 47 is held, and holds and outputs the Δf signal at the lower limit value when the lower limit hold means 50 is held. Is.

With the above-mentioned configuration, referring to FIG. 11, the actual rotation speed signal Nr becomes the variable speed lower limit signal L at time t1, and the lower limit comparison means 48 outputs the hold signal to the lower limit hold means 50. . In this case, the lower limit holding means 50 sets the lower limit of the limit means 51, the Δf signal is limited to the lower limit, and Δf
The correction signal is output.

After that, when the actual rotation speed signal Nr becomes the variable speed range lower limit signal L at time t2, the output of the hold signal is stopped, and the Δf signal is output as it is as the Δf correction signal via the limit means 51. Then, when the actual rotation speed signal Nr becomes the variable speed range upper limit signal H at the time t3, the hold signal from the upper limit comparison means 45 becomes the upper limit hold means 47.
Output to In this case, the Δf signal is the limit means 5
It is limited to the upper limit value of 1 and is output as a Δf correction signal.

Further, when the actual rotation speed signal Nr becomes the variable speed upper limit signal H at time t4, the output of the hold signal from the upper limit comparison means 45 is stopped, and the Δf signal is directly passed through the limit means 51 as the Δf correction signal. Is output.

As described above, according to the fifth embodiment, the Δf correction signal is not uniformly set to zero when the actual rotation speed signal Nr reaches the boundary range, but can be held at the Δf signal at the time of arrival. .

FIG. 12 is a configuration diagram of a variable speed pumped storage hydropower generation system applied to the sixth to tenth embodiments of the present invention. In FIG. 12, main points different from FIG. 19 showing a conventional example. Is based on the Δf signal correction means 22F, the active power detection means 52, and the active power signal Pb between the Δf detection means 11 and the governor-free compensation calculation means 12, and determines whether it is within the operable range or not. That is, Pb is output to the governor-free compensation calculation means 12 so as to prevent the deviation from the operable range.

FIG. 13 is a block diagram of the Δf signal correction means provided in the variable speed generator / motor 10B according to the sixth embodiment of the present invention. The Δf signal correction means 22F includes a comparison means 23a and an active power upper limit. It comprises a signal output means 24a, an active power lower limit signal output means 25a, a zero signal output means 26 and a switching means 27.

Here, the comparison means 23a takes in the active power signal Pb and outputs the active power upper limit signal H and the active power lower limit signal output of the active power upper limit signal output means 24a which is a predetermined boundary range inside the operable range. The active power signal Pb is compared with the active power lower limit signal L of the means 25a.
Is to output a switching signal when the active power upper limit signal H and the active power lower limit signal L are exceeded.

The switching means 27 takes in the Δf signal and contacts 2
While outputting as it is as the Δf correction signal via 7b, when the switching signal is input from the comparing means 23a, the zero signal from the zero signal outputting means 26 is output via the contact 27a.

With the above configuration, the operation will be described with reference to the operation diagram shown in FIG. 14. As shown in the upper part of the figure, the active power signal Pb before the time t1 is the active power upper limit signal H which is the boundary range.
And within the range of the active power lower limit signal L, the Δf signal is directly output to the governor-free compensation calculation means 12 via the contact 27b of the switching means 27 as a Δf correction signal. In this case, the system frequency is controlled to be the reference frequency signal as described in the related art.

After that, at time t1, the active power signal Pb reaches the active power lower limit signal L. At this time, the switching signal is output from the comparison means 23a to the switching means 27, the contact 27b is opened and the contact 27a is closed, and as a result, the zero signal is outputted from the zero signal output means 26 as the Δf correction signal to the governor-free compensation calculation means 12. Is output to. As a result, it is possible to prevent each compensation signal from the governor-free compensation calculation means 12 from being output as zero and the active power signal Pb from deviating from the operable range.

Further, at the time t2, the active power signal Pb falls within the range of the active power lower limit signal L and the active power upper limit signal H, and the Δf signal is directly output as the Δf correction signal via the contact 27b. Then, at time t3, the active power signal Pb reaches the active power upper limit signal H. In this case, the switching signal is output from the comparison means 23a to the switching means 27, the contact 27a is closed, and the zero signal output means 26 is opened again.
Is output as a Δf correction signal from the contact 27a.

In the governor-free compensation calculation means 12 to which the zero signal is input, each compensation signal is output as zero, and it is possible to prevent the active power signal Pb from deviating from the operable range. As a result, at time t4, the active power signal Pb is again generated.
Becomes the active power upper limit signal H.

As described above, according to the sixth embodiment of the present invention, when the active power signal Pb reaches the boundary range of the active power upper limit signal H or the active power lower limit signal L, the Δf signal is set to zero and the governor-free compensation is performed. Since the active power signal Pb is output to the calculating means 12, it is possible to prevent the active power signal Pb from deviating from the operable range, and to prevent the active power signal Pb from becoming unstable.

FIG. 15 is a block diagram of the Δf signal correction means provided in the variable speed generator-motor apparatus according to the seventh embodiment of the present invention. The Δf signal correction means 22G is a comparison means 23a.
And an active power upper limit signal output means 24a, an active power lower limit signal output means 25a, a zero signal output means 26, a switching means 27 and a rate limiter 28.
Is characterized by having.

Here, the rate limiter 28 limits the change rate by a predetermined rate when the Δf signal or the zero signal is input through the switching means 27, and the governor-free compensation calculating means 12
Output to

With the above configuration, when the active power signal Pb reaches the lower limit of the active power lower limit signal L, the comparison means 23a outputs the switching signal to the switching means 27, the contact 27b is opened and the contact 27a is closed. As a result, the zero signal output means 26 outputs a zero signal as a Δf correction signal to the rate limiter 28 via the contact 27a.

The rate limiter 28 outputs a Δf correction signal for gradually shifting from the Δf signal to the zero signal. In this way, the action of the rate limiter 28 outputs the Δf correction signal at a predetermined change rate. As a result, compared to the sixth embodiment, the Δf correction signal can be changed stably without sudden fluctuation.

FIG. 16 is a block diagram of the Δf signal correction means provided in the variable speed generator-motor apparatus according to the eighth embodiment of the present invention. The Δf signal correction means 22H is a variable gain calculation means 30a and a multiplication means. It is composed of 31 and.

Here, the variable gain computing means 30a makes zero outside the active power signal Pb outside the active power upper and lower limits (points A and B), but gradually approaches the gain 1 when going inward (C , D point), the function is set so that a gain signal having a gain of 1 is output. The multiplication means 31
The Δf signal is output by multiplying the Δf signal by the gain signal from the variable gain calculation means 30a.

With the above configuration, when the active power signal Pb becomes equal to or less than the value at point D, the function signal is set and the gain signal is multiplied by the multiplication means 31.
The gain signal is multiplied by the Δf signal and output as a Δf correction signal. Furthermore, the active power signal Pb is B
When the value becomes equal to or less than the point value, the gain signal 0 is output from the variable gain calculation means 30a, and the Δf correction signal 0 is output from the multiplication means 31.
Is output. When the active power signal Pb rises and reaches a value equal to or higher than the point B, the gain signal is output so as to be gradually larger than 0, and the Δf correction signal from the multiplying means 31 gradually increases from 0. When the active power signal Pb reaches the value at the point D, the gain signal 1 is output and the multiplying means 31 outputs the Δf signal as the Δf correction signal. In addition, C on the upper limit side
The same applies to point and point A.

As described above, according to the eighth embodiment, when the active power signal Pb reaches the boundary range, the Δf correction signal is output as zero, while the active power signal Pb is within a predetermined range inside the boundary range. The Δf correction signal is gradually increased from zero, and the active power signal Pb is the active power command signal Pa.
In the range close to, the Δf signal is directly output as the Δf correction signal. Therefore, the Δf correction signal can be stably changed without sudden change, and further, it does not deviate from the operable range.

FIG. 17 is a block diagram of the Δf signal correcting means provided in the variable speed generator-motor apparatus according to the ninth embodiment of the present invention, wherein the Δf signal correcting means 22I is the upper limit comparing means 3
2a, active power upper limit signal output means 33a, Δf upper limit signal output means 34, zero signal output means 35, and upper limit side switching means 3
6 and further includes a lower limit comparison means 37a, an active power lower limit signal output means 38a, a Δf lower limit signal output means 39, a zero signal output means 40, a lower limit side switching means 41, and a limiter 42.
It is composed of

Here, the upper limit comparison means 32a outputs a switching signal when the active power signal Pb becomes the active power upper limit signal H from the active power upper limit signal output means 33a. The upper limit switching means 36 includes the Δf upper limit signal output means 34.
The limiter 42 using the Δf upper limit signal from
On the other hand, when the switching signal is input, the zero signal output means 35 sets the zero signal in the limiter 42 as the upper limit.

The lower limit comparing means 37a detects the active power signal Pb.
Is the active power lower limit signal L from the active power lower limit signal output means 38a, a switching signal is output. The lower limit side switching means 41 uses the Δ from the Δf lower limit signal output means 39.
While the f lower limit signal is set in the limiter 42 as the lower limit, when the switching signal is input, the zero signal output unit 40 sets the zero signal in the limiter 42 as the lower limit.

When the Δf signal is within the range between the upper limit and the lower limit, the limiter 42 outputs it as it is as a Δf correction signal. It is limited and outputs the Δf correction signal.

With the above configuration, when the active power signal Pb becomes the active power lower limit signal L, the lower limit comparing means 37a outputs a switching signal to the lower limit side switching means 41. In this case, the contact 41a of the lower limit switching means 41 is closed, and the zero signal from the zero signal output means 40 is set in the limiter 42 as the lower limit. As a result, the Δf signal is limited by the limiter 42, the zero signal is output when the Δf signal is zero or less, and the Δf correction signal is output as it is when the Δf signal is zero or more.

When the active power signal Pb becomes the active power lower limit signal L, the output of the switching signal from the lower limit comparison means 37a is stopped, and the Δf lower limit signal is output to the limiter 42 via the contact 41b.
Is set as the lower limit. As a result, the Δf signal is directly output as the Δf correction signal via the limiter 42.

When the active power signal Pb becomes the active power upper limit signal H, a switching signal is output from the upper limit comparison means 32a to the upper limit side switching means 36. In this case, the upper limit switching means 3
The zero signal is set to the upper limit of the limiter 42 via the contact 36a of No. 6. As a result, the upper limit of the Δf signal is limited to zero by the limiter 42 and a Δf correction signal of zero is output, while the Δf signal is output as it is when the Δf signal is zero or less.

As described above, according to the ninth embodiment of the present invention, when the active power signal Pb reaches the upper limit of the boundary range, only the upper limiter is set to zero. The active power signal Pb
When the lower limit of the boundary range is reached, the lower limit limiter is set to zero, so that the active power signal Pb does not fall outside the operable range.

FIG. 18 is a block diagram of the Δf signal correcting means provided in the variable speed generator-motor apparatus according to the tenth embodiment of the present invention. The Δf signal correcting means 22J includes an upper limit comparing means 45a and an active power upper limit. Signal output means 46a, upper limit hold means 47, lower limit comparison means 48a, active power lower limit signal output means 49a, lower limit hold means 50 and limit means 5
It is composed of 1.

The upper limit comparing means 45a outputs an upper limit hold signal to the upper limit holding means 47 when the active power signal Pb becomes the active power upper limit signal H. The lower limit comparing means 48a outputs a lower limit hold signal to the lower limit holding means 50 when the active power signal Pb becomes the active power lower limit signal L. The limit means 51 holds and outputs the Δf signal at the upper limit value when the upper limit hold means 47 is held, while the lower limit hold means 5 is held.
When 0 is held, the Δf signal is held and output at the lower limit value.

With the above configuration, when the active power signal Pb becomes the active power lower limit signal L, the lower limit comparison means 48a outputs a hold signal to the lower limit hold means 50. In this case, the lower limit holding means 50 sets the lower limit of the limit means 51, limits the Δf signal to the lower limit, and outputs the Δf correction signal.

When the active power signal Pb becomes the active power lower limit signal L, the output of the hold signal is stopped, and the Δf signal is directly output as the Δf correction signal via the limit means 51. When the active power signal Pb becomes the active power upper limit signal H, the upper limit comparison means 45 outputs a hold signal to the upper limit hold means 47. In this case, the Δf signal is limited to the upper limit value of the limit means 51,
It is output as a Δf correction signal.

As described above, according to the tenth embodiment, when the active power signal Pb reaches the boundary range, the Δf correction signal is not uniformly set to zero but is held at a predetermined value. Pb can be quickly returned to the boundary range and can be brought close to the system frequency.

[0105]

According to the invention of claim 1, when the slip reaches the variable speed operation limit range, a predetermined compensation signal is output to the slip control means, so the slip deviates from the variable speed operation limit range. Can be prevented and the slip can be prevented from becoming unstable.

According to the second aspect of the invention, when the slip reaches the variable speed operation limit range, a predetermined compensation signal is output to the guide vane control means, so the slip deviates from the variable speed operation limit range. It is possible to prevent the slip and to prevent the slip from becoming unstable.

According to the third aspect of the invention, when the slip reaches the variable speed operation limit range, the predetermined compensation signal compensates the active power command, so that the slip deviates from the variable speed operation limit range. It is possible to prevent the slip from becoming unstable and being blocked.

According to the fourth aspect of the present invention, when the slip reaches the variable speed operation limit range, the predetermined compensation signal compensates the torque current command, so that the slip does not deviate from the variable speed operation limit range. It is possible to prevent and prevent the slip from becoming unstable.

According to the fifth aspect of the present invention, when the actual rotation speed reaches the variable speed operation limit range, the predetermined compensation signal is output to the speed control means for producing the torque current command, so that the actual rotation speed is It is possible to prevent deviation from the variable speed operation limit range and avoid instability of the actual rotation speed.

According to the sixth aspect of the invention, when the actual rotation speed reaches the variable speed operation limit range, the predetermined compensation signal is output to the guide vane control means for controlling the guide vanes, so that the actual rotation speed is increased. It is possible to prevent the speed from deviating from the variable speed operation limit range and prevent the actual rotation speed from becoming unstable.

According to the invention of claim 7, when the actual rotation speed reaches the variable speed operation limit range, the predetermined compensation signal compensates the active power command, so that the actual rotation speed is out of the variable speed operation limit range. It is possible to prevent the deviation from occurring and prevent the actual rotation speed from becoming unstable.

According to the invention of claim 8, when the actual rotation speed reaches the variable speed operation limit range, the predetermined compensation signal is output to the AC excitation control means for controlling the AC excitation.
It is possible to prevent the actual rotation speed from deviating from the variable speed operation limit range, and to prevent the actual rotation speed from becoming unstable.

According to the ninth aspect of the present invention, when the active power reaches the variable speed operation limit range, the predetermined compensation signal is the slip control means, the guide vane control means, the function generation means,
Since the AC power is output to any one of the AC excitation control means, it is possible to prevent the active power from deviating from the variable speed operation limit range, and to prevent the active power from becoming unstable.

According to the tenth aspect of the present invention, when the active power reaches the variable speed operation limit range, the predetermined compensation signal is the speed control means, the guide vane control means, the function generation means,
Since the AC power is output to any one of the AC excitation control means, it is possible to prevent the active power from deviating from the variable speed operation limit range, and to prevent the active power from becoming unstable.

According to the eleventh aspect of the present invention, the compensation signal is limited at a predetermined rate of change, so that the compensation signal can smoothly change and the slip can be stably changed without sudden change.

According to the twelfth aspect of the invention, since the variable gain is set in the vicinity of the variable speed operation limit range, the compensation signal does not suddenly change and the compensation signal is smoothly increased / decreased to quickly and normally slip. can do.

According to the thirteenth aspect of the present invention, since only one of the limiters is set to zero, the slip can be quickly restored.

According to the fourteenth aspect of the present invention, since only one of the limiters is set to the predetermined value, the slip can be quickly restored.

According to the fifteenth aspect of the present invention, since the compensation signal is limited at a predetermined rate of change, the actual rotation speed signal can be stably changed without a sudden change of the compensation signal.

According to the sixteenth aspect of the invention, since the variable gain is set in the vicinity of the variable speed operation limit range, the compensation signal does not change suddenly and the compensation signal is smoothly increased / decreased to speed up the actual rotation speed signal. Can be normal.

According to the seventeenth aspect of the invention, since only one of the limiters is set to zero, the actual rotation speed signal can be quickly returned.

According to the eighteenth aspect of the present invention, since only one of the limiters is set to the predetermined value, the actual rotation speed signal can be quickly returned.

According to the nineteenth aspect of the present invention, since the compensation signal is limited at a predetermined rate of change, the active power signal can be stably changed without changing suddenly.

According to the twentieth aspect of the present invention, since the variable gain is set in the vicinity of the variable speed operation limit range, the compensation signal does not change suddenly and the compensation signal is smoothly increased or decreased to quickly output the active power signal. Can be normal.

According to the twenty-first aspect of the present invention, since only one of the limiters is set to zero, the active power signal can be quickly returned.

According to the twenty-second aspect of the present invention, since only one of the limiters is set to the predetermined value, the active power signal can be quickly returned.

[Brief description of drawings]

FIG. 1 is a configuration diagram of a variable speed generator-motor apparatus showing a first embodiment to a fifth embodiment of the present invention.

FIG. 2 is a configuration diagram of Δf signal correction means according to the first embodiment of the present invention.

FIG. 3 is a time chart showing the operation of FIG.

FIG. 4 is a configuration diagram of Δf signal correction means according to a second embodiment of the present invention.

FIG. 5 is a time chart showing the operation of FIG.

FIG. 6 is a configuration diagram of Δf signal correction means according to a third embodiment of the present invention.

FIG. 7 is a time chart showing the operation of FIG.

FIG. 8 is a configuration diagram of Δf signal correction means according to a fourth embodiment of the present invention.

9 is a time chart showing the operation of FIG.

FIG. 10 is a configuration diagram of Δf signal correction means according to a fifth embodiment of the present invention.

11 is a time chart showing the operation of FIG.

FIG. 12 is a configuration diagram of a variable speed generator-motor apparatus showing sixth to tenth embodiments of the present invention.

FIG. 13 is a configuration diagram of Δf signal correction means according to a sixth embodiment of the present invention.

FIG. 14 is a time chart showing the operation of FIG.

FIG. 15 is a configuration diagram of Δf signal correction means according to a seventh embodiment of the present invention.

FIG. 16 is a configuration diagram of Δf signal correction means according to an eighth embodiment of the present invention.

FIG. 17 is a configuration diagram of Δf signal correction means according to a ninth embodiment of the present invention.

FIG. 18 is a configuration diagram of Δf signal correction means showing a tenth embodiment of the present invention.

FIG. 19 is a configuration diagram showing a conventional variable speed generator-motor device.

FIG. 20 is an explanatory diagram showing a range of active power that can be operated during power generation in FIG. 19;

FIG. 21 is an explanatory diagram showing a range of active power that can be operated during pumping of FIG.

FIG. 22 is a configuration diagram of a governor-free compensation calculation means.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 generator-motor 1a stator winding 1b rotor winding 6 frequency converter 7 speed slip detector 8 guide vanes 10 variable speed generator-motor device 11 Δf detection means 12 governor-free compensation calculation means 14 high-efficiency function / active power control means 17 speed slip control means 19 current control means 21 guide vane control means 22A-22J Δf signal correction means 23 comparison means 24, 33, 46 variable speed range upper limit signal output means 25, 38, 49 variable speed range lower limit signal output means 27 switching Means 28 Rate limiter 30 Variable gain calculation means 31 Multiplier means 32, 45 Upper limit comparison means 36 Upper limit side switching means 41 Lower limit side switching means 42 Limiter 47 Upper limit holding means 50 Lower limit holding means 51 Limiting means 52 Active power detecting means

Claims (22)

[Claims] 1. A winding type induction generator motor having a primary winding connected to an electric power system and a secondary winding AC-excited, and a prime mover / load coupled to a rotary shaft of the winding type induction generator motor. In the variable speed generator-motor apparatus, a slip detecting means for detecting a slip of the AC excitation based on a frequency of the power system and an actual rotation speed of the rotating shaft, a slip command and a guide slip based on an active power command and a head. Function generating means for calculating and outputting a command, and a compensation signal for making the primary side frequency of the wire wound induction generator motor closer to a reference frequency based on the frequency fluctuation signal of the electric power system, while the slippage is variable speed. When the operation limit range is reached, compensation calculation means for calculating and outputting a compensation signal for preventing deviation of the slip from the variable speed operation limit range; and the slip command, A slip control means for calculating and outputting a torque current command based on the compensation signal and the slip, an AC excitation control means for controlling the AC excitation based on the torque current command, and a guide vane based on the guide vane command. And a guide vane control means for controlling the engine. 2. A winding type induction generator motor in which a primary winding is connected to a power system and a secondary winding is AC-excited, and a prime mover / load coupled to a rotary shaft of the winding type induction generator motor. In the variable speed generator-motor apparatus, a slip detecting means for detecting a slip of the AC excitation based on a frequency of the power system and an actual rotation speed of the rotating shaft, a slip command and a guide slip based on an active power command and a head. A function generating means for computing and outputting a command to generate a command, and a compensating signal for approximating the primary side frequency of the wound-rotor induction generator motor to a reference frequency based on the frequency fluctuation signal of the power system, while the variable speed of the slip is calculated. Compensation calculation means for calculating and outputting a compensation signal for preventing deviation of the slip from the variable speed operation limit range when the operation limit range is reached; A slip control means for calculating and outputting a torque current command based on slip, an AC excitation control means for controlling the AC excitation based on the torque current command, and a guide vane based on the guide vane command and the compensation signal. And a guide vane control means for controlling the variable speed generator-motor device. 3. A winding type induction generator motor in which a primary winding is connected to a power system and a secondary winding is AC-excited, and a prime mover / load coupled to a rotating shaft of the winding type induction generator motor. In the variable speed generator-motor apparatus, slip detecting means for detecting a slip of the AC excitation based on a frequency of the power system and an actual rotation speed of the rotating shaft, and a wound-type induction power generation based on a frequency fluctuation signal of the power system. While outputting a compensation signal to bring the primary frequency of the motor close to the reference frequency, when the slip reaches the variable speed operation limit range, compensation for preventing deviation of the slip from the variable speed operation limit range Compensation calculation means for calculating and outputting a signal, and function generation means for calculating and outputting a slip command and a guide vane command based on the active power command corrected by the compensation signal and the head. , A slip control means for calculating and outputting the torque current command based on the slip command and the slip, an AC excitation control means for controlling the AC excitation based on the torque current command, and a guide based on the guide vane command A variable speed generator-motor device, comprising: a guide vane control means for controlling the vane. 4. A winding type induction generator motor in which a primary winding is connected to an electric power system and a secondary winding is AC-excited, and a prime mover / load coupled to a rotary shaft of the winding type induction generator motor. In the variable speed generator-motor apparatus, a slip detecting means for detecting a slip of the AC excitation based on a frequency of the power system and an actual rotation speed of the rotating shaft, a slip command and a guide slip based on an active power command and a head. Function generating means for calculating and outputting a command, and calculating and outputting a compensating signal for bringing the primary side frequency of the wound-rotor induction generator motor close to a reference frequency based on the frequency fluctuation signal of the power system, while the slip is variable speed operation. When the limit range is reached, compensation calculation means for calculating and outputting a compensation signal for preventing the slip from deviating from the variable speed operation limit range, the slip command and the slip A slip control means for calculating and outputting a torque current command based on the above, an AC excitation control means for controlling the AC excitation based on the torque current command and the compensation signal, and a guide vane based on the guide vane command. Variable speed generator-motor device. 5. A winding type induction generator motor in which a primary winding is connected to a power system and a secondary winding is AC-excited, and a prime mover / load coupled to a rotary shaft of the winding type induction generator motor. In the variable speed generator-motor apparatus, speed detecting means for detecting an actual rotation speed of the rotary shaft, function generating means for calculating and outputting a speed command and a guide vane command based on an active power command and a head, the power On the other hand, based on the frequency fluctuation signal of the grid, while outputting a compensation signal for making the primary side frequency of the wound-rotor induction generator motor close to the reference frequency, when the actual rotation speed reaches the variable speed operation limit range, Compensation calculation means for calculating and outputting a compensation signal for preventing deviation of the actual rotation speed from the variable speed operation limit range, and a torque current based on the speed command, the compensation signal and the actual rotation speed. A speed control means for calculating and outputting a command, an AC excitation control means for controlling the AC excitation based on the torque current command, and a guide vane control means for controlling a guide vane based on the guide vane command. A variable-speed power generator-motor device having: 6. A winding type induction generator motor in which a primary winding is connected to a power system and a secondary winding is AC-excited, and a prime mover / load coupled to a rotary shaft of the winding type induction generator motor. In the variable speed generator-motor apparatus, speed detecting means for detecting an actual rotation speed of the rotary shaft, function generating means for calculating and outputting a speed command and a guide vane command based on an active power command and a head, and the electric power On the other hand, based on the frequency fluctuation signal of the system, the compensating signal for approximating the primary side frequency of the winding type induction generator motor to the reference frequency is arithmetically output, while when the variable speed operation limit range of the actual rotation speed is reached, Compensation calculation means for calculating and outputting a compensation signal for preventing deviation of the actual rotation speed from the variable speed operation limit range, and calculation and output of a torque current command based on the speed command and the actual rotation speed. Degree control means, AC excitation control means for controlling the AC excitation based on the torque current command, and guide vane control means for controlling the guide vane based on the guide vane command and the compensation signal. A variable speed generator-motor device characterized by having. 7. A winding type induction generator motor in which a primary winding is connected to a power system and a secondary winding is AC-excited, and a prime mover / load coupled to a rotating shaft of the winding type induction generator motor. In the variable speed generator-motor apparatus described above, speed detection means for detecting an actual rotation speed of the rotary shaft, and compensation for making the primary side frequency of the wound-rotor induction generator motor close to a reference frequency based on a frequency fluctuation signal of the power system. While outputting the signal by calculation, when the actual rotation speed reaches the variable speed operation limit range, compensation calculation means for calculating and outputting a compensation signal for preventing deviation of the actual rotation speed from the variable speed operation limit range. A function generating means for calculating and outputting a speed command and a guide vane command based on the active power command corrected by the compensation signal and the head, and a torque generator based on the speed command and the actual rotation speed. Speed control means for calculating and outputting a current command, AC excitation control means for controlling the AC excitation based on the torque current command, and guide vane control means for controlling a guide vane based on the guide vane command And a variable-speed generator-motor device. 8. A winding type induction generator motor in which a primary winding is connected to a power system and a secondary winding is AC-excited, and a prime mover / load coupled to a rotary shaft of the winding type induction generator motor. In the variable speed generator-motor apparatus, speed detecting means for detecting an actual rotation speed of the rotary shaft, function generating means for calculating and outputting a speed command and a guide vane command based on an active power command and a head, the power Based on the frequency fluctuation signal of the system, while outputting a compensation signal to bring the primary side frequency of the wound-rotor induction generator motor close to the reference frequency, when the actual rotation speed reaches the variable speed operation limit range, Compensation calculation means for calculating and outputting a compensation signal for preventing deviation of the rotation speed from the variable speed operation limit range, and speed control for calculating and outputting a torque current command based on the speed command and the actual rotation speed. Means, an AC excitation control means for controlling the AC excitation based on the torque current command and the compensation signal, and a guide vane control means for controlling a guide vane based on the guide vane command. A variable speed generator-motor device characterized by. 9. The compensation calculating means calculates and outputs a compensation signal for bringing the primary side frequency of the wire wound induction generator motor closer to a reference frequency on the basis of a frequency fluctuation signal of the electric power system, while replacing the slip. When the active power supplied to the power system reaches a variable speed operation limit range, a compensation signal for preventing deviation of the active power from the variable speed operation limit range is arithmetically output. The variable speed generator-motor device according to any one of claims 1 to 4. 10. The compensation calculation means calculates and outputs a compensation signal for bringing a primary side frequency of the wire wound induction generator motor closer to a reference frequency on the basis of a frequency fluctuation signal of the electric power system, and outputs the actual rotation speed to the actual rotation speed. Alternatively, when the active power supplied to the electric power system reaches the variable speed operation limit range, a compensation signal for preventing deviation of the active power from the variable speed operation limit range is calculated and output. The variable speed generator-motor device according to any one of claims 5 to 8. 11. The compensation calculation means, when the slip reaches the variable speed operation limit range determined in advance, limits the frequency fluctuation signal to a zero signal while limiting at a predetermined rate of change, while the slip 5. When any of the above-mentioned variable speed operation limit ranges is entered inward, it is limited at a predetermined rate of change to shift from the zero signal to the frequency fluctuation signal. The variable speed generator-motorized device. 12. The compensation calculation means further provides an inner boundary range inside the variable speed operation limit range, and outputs a gain signal as zero when the slip reaches the variable speed operation limit range. On the other hand, when the slip is between the variable speed operation limit range and the inner boundary range, the gain signal is increased and output as going inward, and when the slip is within the inner boundary range, the gain signal is set to 1 5. A variable gain calculation means for outputting the frequency fluctuation signal and a multiplication means for using the signal obtained by multiplying the frequency fluctuation signal by the gain signal as the compensation signal are provided. Variable speed generator-motorized device. 13. The compensation calculation means sets an upper limit and a lower limit to predetermined values when the slip is within the variable speed operation limit range, and when the slip reaches the variable speed operation limit range. A setting means for setting the upper limit or the lower limit on the corresponding side to zero, and one of outputting the frequency fluctuation signal as a compensation signal when the frequency fluctuation signal is within the range between the upper limit and the lower limit. A limiter is provided, which is limited to the upper limit or the lower limit and outputs as a compensation signal when the frequency fluctuation signal is out of the range between the upper limit and the lower limit. 4. The variable speed generator-motor device according to any one of 4 above. 14. The compensating calculation means outputs a corresponding upper limit hold signal or lower limit hold signal when the slip reaches the variable speed operation limit range,
When the upper limit hold signal is input, the Δf signal is limited to the upper limit value or less to be a compensation signal,
5. A variable speed generator-motor according to claim 1, further comprising: a limiter which limits the Δf signal to a value equal to or higher than a lower limit value when the lower limit hold signal is input to obtain a compensation signal. apparatus. 15. The compensation calculation means, when the actual rotation speed signal reaches the predetermined variable speed operation limit range, limits the frequency change signal to a zero signal while limiting the change at a predetermined change rate, 6. The method according to claim 5, wherein when the actual rotation speed signal enters inward from the variable speed operation limit range, the actual rotation speed signal is limited at a predetermined change rate to shift from the zero signal to the frequency fluctuation signal. 8. The variable speed generator-motor device according to any one of 8 above. 16. The compensation calculation means further provides an inner boundary range inside the variable speed operation limit range, and sets a gain signal to zero when an actual rotation speed signal reaches the variable speed operation limit range. On the other hand, when the actual rotation speed signal is between the variable speed operation limit range and the inner boundary range, the gain signal is increased and output as it goes inward, and the actual rotation speed signal enters the inner boundary range. 6. A variable gain calculating means for outputting a gain signal as 1 when the above-mentioned, and a multiplying means for making a signal obtained by multiplying the frequency fluctuation signal by the gain signal the compensation signal are provided. Item 9. The variable speed generator-motor device according to any one of items 8. 17. The compensation calculation means sets an upper limit and a lower limit to predetermined values when the actual rotation speed signal is within the variable speed operation limit range, while the actual rotation speed signal is set to the variable speed operation. When the limit range is reached, setting means for setting the upper limit or the lower limit of the corresponding side to zero, and the frequency fluctuation signal when the frequency fluctuation signal is within the range between the upper limit and the lower limit. While being output as a compensation signal, a limiter is provided that is limited to the upper limit or the lower limit and outputs as a compensation signal when the frequency fluctuation signal is out of the range between the upper limit and the lower limit. The variable speed generator-motor device according to any one of claims 5 to 8. 18. The compensation calculation means, when the actual rotation speed signal reaches the variable speed operation limit range, outputs a corresponding upper limit hold signal or a lower limit hold signal, and inputs the upper limit hold signal. A limiter is provided to limit the Δf signal to be equal to or less than the upper limit value to be a compensation signal, and to limit the Δf signal to be equal to or more than the lower limit value to be a compensation signal when the lower limit hold signal is input. The variable speed generator-motor device according to any one of claims 5 to 8. 19. The compensation calculation means, when the active power signal reaches a predetermined variable speed operation limit range,
While limiting the frequency fluctuation signal to a zero signal by limiting at a predetermined rate of change, when the active power signal enters inward from the variable speed operation limit range, limiting at a predetermined rate of change and changing from the zero signal to the zero signal. The variable speed generator-motor apparatus according to claim 9 or 10, characterized in that the variable speed generator-motor device is adapted to shift to a frequency fluctuation signal. 20. The compensation calculation means further provides an inner boundary range inside the variable speed operation limit range, and sets a gain signal to a zero signal when the active power signal reaches the variable speed operation limit range. On the other hand, when the active power signal is between the variable speed operation limit range and the inner boundary range, the gain signal is increased and output as it goes inward, and the active power signal enters the inner boundary range. 10. A variable gain calculation means for outputting a gain signal as 1 in this case, and a multiplication means for using a signal obtained by multiplying the frequency fluctuation signal by the gain signal as the compensation signal. Item 10. The variable speed generator-motor device according to Item 10. 21. The compensation calculation means sets an upper limit and a lower limit to predetermined values when the active power signal is within the variable speed operation limit range, while the active power signal is within the variable speed operation limit range. Setting means for setting the upper limit or the lower limit of the corresponding side to a zero signal when reaching, and the frequency fluctuation signal as a compensation signal when the frequency fluctuation signal is within the range of the upper limit and the lower limit 10. A limiter, which outputs the compensation signal when the frequency fluctuation signal is out of the range between the upper limit and the lower limit while being outputted, is output as a compensation signal. Alternatively, the variable speed generator-motor device according to claim 10. 22. The compensation calculation means outputs a corresponding upper limit hold signal or a lower limit hold signal when the active power signal reaches the variable speed operation limit range, and Δf when the upper limit hold signal is input. A limiter is provided to limit the signal to an upper limit value or less to be a compensation signal, while limiting the Δf signal to be a lower limit value or more to be a compensation signal when the lower limit hold signal is input. 11. The variable speed generator-motor device according to claim 9 or 10.