WO2023218718A1 - Dispositif de stabilisation de réseau à puissance électrique, procédé de stabilisation de réseau à puissance électrique et programme - Google Patents

Dispositif de stabilisation de réseau à puissance électrique, procédé de stabilisation de réseau à puissance électrique et programme Download PDF

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WO2023218718A1
WO2023218718A1 PCT/JP2023/005550 JP2023005550W WO2023218718A1 WO 2023218718 A1 WO2023218718 A1 WO 2023218718A1 JP 2023005550 W JP2023005550 W JP 2023005550W WO 2023218718 A1 WO2023218718 A1 WO 2023218718A1
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Prior art keywords
power
frequency
power system
command value
flywheel
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PCT/JP2023/005550
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English (en)
Japanese (ja)
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隆治 広江
和成 井手
遼 佐瀬
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三菱重工業株式会社
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Publication of WO2023218718A1 publication Critical patent/WO2023218718A1/fr

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    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J15/00—Systems for storing electric energy
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J3/00—Circuit arrangements for ac mains or ac distribution networks
    • H02J3/28—Arrangements for balancing of the load in a network by storage of energy
    • H02J3/30—Arrangements for balancing of the load in a network by storage of energy using dynamo-electric machines coupled to flywheels
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/16—Mechanical energy storage, e.g. flywheels or pressurised fluids

Definitions

  • the present disclosure relates to a power system stabilization device, a power system stabilization method, and a program.
  • This application claims priority to Japanese Patent Application No. 2022-079453 filed in Japan on May 13, 2022, the contents of which are incorporated herein.
  • the frequency of the power transmission and distribution system is maintained by having power plants perform governor-free operation according to power demand and instantaneously adjusting the power generation output.
  • Electricity demand in offices, factories, general households, etc. fluctuates from moment to moment.
  • the frequency of the power transmission and distribution system decreases below the reference value (e.g., 50 Hz or 60 Hz), and conversely, when the power supply exceeds the power demand, the frequency of the power transmission and distribution system increases above the reference value. do.
  • Power plants adjust generated power according to frequency so as to balance supply with ever-changing demand (see, for example, Patent Document 1). If the adjustment is ideal, the frequency will match the reference value.
  • Generator inertia represents the kinetic energy of the generator and rotor of a power plant, such as a turbine.
  • the rotor accelerates or decelerates depending on the difference between the turbine input and the electrical output; if the difference is negative, the rotor's kinetic energy is released and the rotation speed decreases, and if the difference is positive, the rotation speed increases.
  • ⁇ frequency the rotational speed of the rotor
  • kinetic energy is released to compensate for (suppress) the rotational change according to the equation of motion.
  • the rotor speed also decreases in synchronization with the frequency of the grid.
  • the inertia is large, more kinetic energy is released to compensate for the increase in demand, so fluctuations in the frequency of the power system are small. In this way, the inertia of the generator is important to prevent frequency fluctuations.
  • variable power generation such as solar power generation and wind power generation will increase year by year, but in order to accommodate these fluctuations in power generation, we will need to improve governor-free operation capability and generator inertia. At the same time, we must improve our ability to adjust supply and demand from time to time.
  • ⁇ P G is the variation in power supply
  • ⁇ P L is the variation in power demand
  • J is the inertia of the grid
  • the reference frequency of the power grid is 60 Hz.
  • k is a positive constant called the load frequency characteristic, and represents the property that the load autonomously increases or decreases the power demand to offset frequency fluctuations.
  • the frequency transfer function model of the equation (3) can be obtained from the equations (1) and (2).
  • s is a Laplace operator.
  • a regulating force ⁇ P GF due to governor-free operation is supplied to the power system.
  • the adjustment force ⁇ P GF for governor free operation can be approximated as being proportional to the frequency fluctuation ⁇ f as shown in the following equation (4).
  • k GF is a positive proportionality coefficient.
  • equation (1) becomes equation (5).
  • FIG. 11 shows the relationship between governor free operation and frequency change rate (R réelleC CincinnatiF).
  • the broken line represents the case of governor-free operation, and the solid line represents the case of no governor-free operation.
  • the rate of change of frequency (RoCoF) corresponds to the initial slope of the frequency step response. As shown in FIG. 11, the set value of the frequency step response becomes smaller due to the governor free operation, but the rate of change in frequency (RoCoF) remains unchanged during the governor free operation.
  • the rate of frequency change (RoCoF) is proportional to 1/(4 ⁇ 2 60J whole ) from the initial value theorem of the transfer function. Therefore, in order to reduce the frequency change rate (R réelleC CincinnatiF), it is effective to increase the inertia.
  • the adjustment force ⁇ P J is exerted in proportion to the time differential value of the frequency.
  • k J is a positive proportionality coefficient.
  • f. is the time rate of change of frequency f.
  • FIG. 12 shows the relationship between the adjustment force ⁇ P J , which is proportional to the time differential value of frequency, and the frequency change rate (R réelleC CincinnatiF).
  • the dashed line represents the case of only governor free operation, and the dashed line represents the case where adjustment force ⁇ P J proportional to the time differential value of frequency is added to governor free operation.
  • the proportionality coefficient kJ By setting the proportionality coefficient kJ to be positive, the rate of change in frequency (RoCoF) can be made gentle.
  • An example of using inertia to adjust supply and demand in an electric power system is a system in which the turbines of thermal power plants that have stopped generating electricity are replaced with flywheels.
  • the turbine that powers the generator has been removed, so it can no longer generate electricity on a steady basis like a power plant.
  • the flywheel is synchronized to the power grid via a generator, it can still perform its inertial function.
  • the flywheel As the flywheel speed decreases, the flywheel provides some of its kinetic energy to the power grid.
  • the time rate of change in the rotational speed of the flywheel is expressed as ⁇
  • the compensation power P[W] provided by the flywheel to the power system is expressed by equation (10). The negative sign on the right side indicates that the decrease in the kinetic energy of the flywheel produces a compensation power P.
  • the angular velocity ⁇ of the flywheel is synchronized with the frequency of the power grid (hereinafter also referred to as "grid frequency").
  • the rotational speed ⁇ of the flywheel is the synchronous speed of the grid frequency. Therefore, when the system frequency is expressed as f and the number of poles of the generator is expressed as p, the angular velocity ⁇ of the flywheel is expressed by equation (11).
  • equation (10) becomes equation (12).
  • An object of the present disclosure is to provide a power system stabilization device, a power system stabilization method, and a program that can provide compensation power according to fluctuations in the frequency of a power system.
  • a power system stabilizing device includes a frequency detector that detects a system frequency of an AC power system, and a frequency command value that adjusts the rotation speed of a rotating machine based on the system frequency. and a power converter that is provided between the AC power system and the rotating machine and adjusts the rotation speed of the rotating machine based on the frequency command value.
  • a power system stabilizing device is provided between an AC power system and electrical equipment, and includes a power converter that supplies AC power or DC power to the electrical equipment, and a power converter that supplies AC power or DC power to the electrical equipment; a frequency detector that detects a grid frequency, and a frequency command value of the AC power to be supplied to the electrical equipment or a current command value of the DC power is calculated based on the grid frequency and output to the power converter. and an arithmetic unit.
  • a power system stabilization method includes the steps of: detecting a system frequency of an AC power system; and calculating a frequency command value for adjusting the rotation speed of a rotating machine based on the system frequency. , adjusting the rotation speed of the rotating machine based on the frequency command value.
  • the program includes the steps of: detecting a system frequency of an AC power system; calculating a frequency command value for adjusting the rotation speed of a rotating machine based on the system frequency; and adjusting the rotation speed of the rotating machine based on the value.
  • FIG. 1 is a diagram showing a functional configuration of a power system stabilization device according to a first embodiment. It is a figure showing the functional composition of the power system stabilization device concerning a 2nd embodiment. It is a figure for explaining the function of the electric power system stabilization device concerning a 2nd embodiment. It is a figure showing the functional composition of the electric power system stabilization device concerning a 3rd embodiment. It is a figure showing the functional composition of the air conditioner concerning a 4th embodiment. It is a figure showing the functional composition of a control device and a power system stabilization device concerning a 4th embodiment. It is a figure showing the functional composition of the electric power system stabilization device concerning a 5th embodiment.
  • FIG. 1 is a schematic block diagram showing the configuration of a computer according to at least one embodiment.
  • FIG. 3 is a first diagram showing an example of frequency change rate.
  • FIG. 3 is a second diagram showing an example of frequency change rate.
  • FIG. 1 is a diagram showing the functional configuration of a power system stabilization device according to a first embodiment.
  • the power system stabilizing device 10 (Functional configuration of power system stabilization device)
  • the power system stabilizing device 10 is provided in a facility C such as a power generation plant or a factory, for example.
  • the power system stabilizing device 10 and other electrical equipment 90 in the facility C (for example, a generator, electrical equipment serving as a load, etc.) exchange power with the power system AC.
  • the power system stabilizing device 10 includes a frequency detector 11, a calculation unit 12, a power converter 13, and a rotating machine 14. Further, the rotating machine 14 according to the first embodiment includes an electric motor 14A and a flywheel 14B.
  • the electric motor 14A has a function as an electric motor that drives the flywheel 14B and a function as a generator that is driven by the kinetic energy accumulated in the flywheel 14B. Specifically, when there is a large supply of power grid AC (the grid frequency is higher than the reference frequency), the electric motor 14A supplies power to the flywheel 14B to rotate it, thereby transferring surplus power to the flywheel 14B. It is accumulated as kinetic energy (powering the flywheel 14B).
  • the electric motor 14A converts the kinetic energy stored in the flywheel 14B into electric power and outputs it (regenerated from the flywheel 14B). ) functions as a generator.
  • the frequency detector 11 detects the frequency of the power grid AC (grid frequency). For example, the frequency detector 11 measures the system frequency at the connection point between the power transmission line of the power system AC and the power line of the facility C. In another embodiment, the frequency detector 11 may measure the system frequency near the entrance/exit of the power converter 13 on the power system AC side.
  • the calculation unit 12 calculates a frequency command value for adjusting the rotation speed of the rotating machine 14 based on the system frequency, and outputs it to the power converter 13. Specifically, the calculation unit 12 according to the first embodiment calculates the frequency command value so that the angular velocity of the flywheel 14B increases or decreases in proportion to the system frequency.
  • the power converter 13 is connected to the power system AC, adjusts the rotation speed of the rotating machine 14 based on the frequency command value calculated by the calculation unit 12, and accordingly connects the facility C and the power system AC to which the facility C connects. Consume or supply power.
  • a power converter for AC power consists of an AC power adjustment circuit and a frequency adjustment circuit that change the magnitude (effective value) of voltage without changing the frequency.
  • the power converter 13 described in the first embodiment has a frequency adjustment circuit and the output frequency is arbitrary.
  • the angular velocity ⁇ of the motor 14A and the flywheel 14B is expressed by the above equation (11).
  • the angular acceleration ⁇ of the flywheel 14B can be determined, for example, as shown in equation (13).
  • equation (14) matches equation (12). Therefore, if ⁇ ref or k f is increased so that ⁇ ref ⁇ k f ⁇ 2/p>1, the effect of increasing the inertia J can be obtained equivalently.
  • Equation (12) represents the compensation power generated by the flywheel (flywheel of the prior art) that is synchronized with the grid frequency.
  • the compensation power P is determined from the inertia factor J, the number of poles p of the motor, the system frequency f and its rate of change f. Of these, the number of poles p, the system frequency f and its rate of change f ⁇ are given for the flywheel. Therefore, if an attempt is made to increase the compensation power P using a flywheel synchronized with the grid, the only way is to increase the inertia factor J. That is, it is necessary to make the flywheel larger.
  • the rotation of the flywheel 14B can be made independent of the system frequency.
  • the compensation power P can be adjusted not only by the inertia factor J but also by the angular velocity ⁇ ref of the flywheel 14B and the control constant k f .
  • the same effect as increasing the coefficient of inertia J can be obtained. That is, it becomes possible to provide a large compensation power P with a small flywheel.
  • a frequency detector 11 detects the grid frequency f of the power grid AC.
  • the frequency detector 11 can detect based on the time interval at which the AC voltage waveform of the power system AC crosses 0 volts.
  • the power converter 13 inputs an alternating current with a system frequency f from the power grid AC, and outputs an alternating current with a separately specified frequency fSV to the electric motor 14A that powers the flywheel 14B.
  • the calculation unit 12 calculates the frequency f SV (frequency command value) so that the angular velocity of the flywheel 14B increases or decreases from the reference angular velocity according to fluctuations in the system frequency f (difference from the reference frequency), and operates the power converter. Output to 13.
  • the first advantage of using the power converter 13 in the first embodiment is that the reference angular velocity of the flywheel 14B can be set arbitrarily.
  • the second advantage is that the response of the flywheel rotation to variations in the system frequency f can be adjusted by the control constant k f .
  • the system frequency and flywheel rotation are fixed at a proportional coefficient of 2/p.
  • the reference frequency of the power grid is 60 Hz
  • the grid frequency changes from 60 Hz to 60.1 Hz in one second.
  • the compensation power P when there is no power converter is as shown in the following equation (15).
  • increase the compensation power P either increase the inertia factor J or decrease the number of poles p of the motor. However, these are often given and not optional.
  • the compensation power P provided by the power system stabilizing device 10 according to the first embodiment is expressed by the following equation (16), and can be arbitrarily determined by the value of k f ⁇ ref .
  • the regulated power P is proportional to the fluctuation rate f of the grid frequency.
  • f. is not explicitly written, but it is written that a frequency command f SV is given to the power converter in proportion to the frequency f. If the frequency command f SV to the power converter 13 is proportional to f, then the time rate of change of the frequency command f SV ⁇ is also proportional to f ⁇ , so they are essentially the same.
  • the power system stabilizing device 10 can increase or decrease the compensation power P provided according to the system frequency. Further, the power system stabilizing device 10 can increase the inertia of the flywheel 14B by changing the angular velocity of the flywheel 14B using the power converter 13. Therefore, the power system stabilizing device 10 can provide large compensation power P even if a small flywheel is used. Thereby, it is possible to downsize the power system stabilizing device 10.
  • FIG. 1 shows an example in which the power system stabilizing device 10 is installed in a facility C such as a power generation plant or a factory, it can also be installed in a facility where a large flywheel cannot be installed, such as a home or office.
  • the calculation unit 12 calculates a frequency command value based on the angular velocity or angle of the flywheel 14B and their estimated values, and adjusts the AC power output by the power converter 13. You may.
  • FIG. 2 is a diagram showing the functional configuration of the power system stabilization device according to the second embodiment.
  • the power system stabilizing device 10 according to the second embodiment has the first feature in that it further includes an angular velocity meter 14C that detects the angular velocity of the flywheel 14B and a compensation power limiter 15. It is different from the embodiment.
  • the compensation power limiter 15 determines the upper limit or lower limit of the time rate of change of the frequency command value based on the deviation between the frequency command value and the reference frequency of the power system AC.
  • the flywheel 14B is stopped.
  • the power system stabilizing device 10 is activated, the flywheel 14B is accelerated to the reference angular velocity ⁇ ref .
  • the power system stabilizing device 10 according to the second embodiment does not constantly apply power to the flywheel 14B, but allows the power to be applied to the flywheel 14B to suppress fluctuations in the system frequency of the power system AC.
  • the power running power is restricted to be applied to the flywheel 14B only when it acts on the suppressing side (that is, when the system frequency is increasing).
  • the power grid stabilizing device 10 when stopped and the regenerated power taken out from the flywheel 14B acts to suppress fluctuations in the grid frequency of the power grid AC (i.e., when the grid frequency is decreasing), In this case, the regenerative power is limited to only be taken out from the flywheel 14B.
  • the compensation power limiter 15 compares the reference angular velocity ⁇ ref of the flywheel 14B and the current angular velocity ⁇ measured by the angular velocity meter 14C, and when the angular velocity ⁇ is insufficient to the reference angular velocity ⁇ ref Limit regeneration to 0kW. Since the frequency of the power grid AC is a constant value of, for example, 60 Hz, the expected value of the rate of change f ⁇ of the frequency of the power grid AC is zero.
  • FIG. 3 is a diagram for explaining the functions of the power system stabilization device according to the second embodiment.
  • the regeneration limit value P LREG and the power running limit value P LPOW determined for the angular velocity ⁇ of the flywheel are “regeneration limit value P LREG ⁇ Since the power running limit value P LPOW '' is the expected value of the compensation power P, the expected value of the compensation power P shifts to the negative side (the flywheel 14B is powered and power is absorbed from the power grid AC). Therefore, the flywheel 14B accelerates over time.
  • the flywheel 14B If the reference angular velocity ⁇ ref of the flywheel 14B is set so that the power running limit value P LPOW and the regeneration limit value P LREG are balanced, the speed of the flywheel 14B is stabilized. In a region where the flywheel 14B exceeds the reference angular velocity ⁇ ref , "regeneration limit value P LREG > power running limit value P LPOW " is set, and the expected value of the compensation power P is on the positive side (regenerated from the flywheel 14B, dissipate power). As a result, the flywheel 14B decelerates and returns to the reference angular velocity ⁇ ref .
  • FIG. 3 shows an example in which the regeneration limit value P LREG and the power running limit value P LPOW are determined depending on the angular velocity ⁇ of the flywheel 14B.
  • Each limit value may be determined depending on the frequency command value f SV of the power converter 13 in addition to the angular velocity ⁇ of the flywheel 14B.
  • the maximum value of power running and the maximum value of regeneration are mainly determined by the capacity of the power converter 13.
  • the induced voltage of the electric motor 14A is proportional to the angular velocity. Therefore, during the speed-up process of the flywheel 14B, the induced voltage is proportional to the angular velocity.
  • the power converter 13 has a current upper limit.
  • the upper limit of the output of the power converter 13 is proportional to the angular velocity. This is why the power running limit value P LPOW is proportional to the angular velocity in the region below the reference angular velocity ⁇ ref .
  • the compensation power limiter 15 determines the frequency command value f SV1 with power limitation in consideration of the power running limit value P LPOW and the regeneration limit value P LREG .
  • the compensation power limiter 15 receives input of the deviation between the system frequency f and the reference frequency (for example, 60 Hz) and the angular velocity ⁇ of the flywheel 14B. Since the reference frequency does not change over time, the compensation power P 1 when the flywheel 14B is synchronized with the power grid AC can be obtained from the time change rate of the frequency deviation and the angular velocity ⁇ of the flywheel 14B using the following equation (17).
  • the compensation power P2 is converted into a rate of change in the output frequency of the power converter 13.
  • f SV2 is expressed by the following equation (19).
  • the compensation power limiter 15 integrates this to obtain the frequency command value f SV1 of the power converter 13.
  • the power system stabilizing device 10 can reduce the power running power when accelerating the flywheel 14B when starting, or the regenerative power when decelerating the flywheel 14B when stopping. Disturbance of the power system AC can be suppressed.
  • the reference angular velocity ⁇ ref of the flywheel 14B and the control constant k f of the compensation power P are predefined fixed values.
  • the power system stabilizing device 10 makes the reference angular velocity ⁇ ref of the flywheel 14B or the control constant k f of the compensation power P variable. It is different from the form.
  • the compensation power P is determined from the system frequency f of the power system AC by the above-mentioned equation (14).
  • the compensation power P must be located between the regeneration limit value P LREG and the power running limit value P LPOW .
  • the expected value of the square of the compensation power P satisfies the following equation (21) for the adjustment constant C that is greater than 0 and approximately 1 or less, it can be said that the situation exists.
  • a candidate value for C is, for example, 0.5.
  • the magnitude of the compensation power P can be adjusted by the product of the reference angular velocity ⁇ ref and the control constant k f , as shown in equation (14) above. For example, if the product of the reference angular velocity ⁇ ref and the control constant k f is updated at regular intervals (for example, every minute) using the following equation (22) according to the magnitude relationship between both sides of equation (21), compensation can be achieved. Electric power P can be maintained between the regeneration limit value P LREG and the power running limit value P LPOW .
  • the control constant kf should be made as large as possible.
  • the power converter 13 has upper and lower limits on its frequency change rate.
  • the control constant k f is fixed to a value as large as possible within a range that does not exceed the upper and lower limits of the frequency change rate, and the product of the reference angular velocity ⁇ ref and the control constant k f , that is, the magnitude of the compensation power P, is reflected in the reference angular velocity ⁇ ref . do.
  • the calculation unit 12 updates the value of the reference angular velocity ⁇ ref using the following equation (23).
  • the utilization rate of the power converter 13 can be increased by changing the reference angular velocity ⁇ ref of the flywheel 14B or the control constant k f that determines the compensation power P as described above.
  • the power system stabilizing device 10 can operate without excessively surplus or insufficient capacity of the power converter 13.
  • FIG. 4 is a diagram showing a functional configuration of a power system stabilization device according to a third embodiment. As shown in FIG. 4, the power system stabilization device 10 according to the third embodiment further includes an active power detector 16 and an active power compensator 17.
  • the active power detector 16 detects the active power that the facility C exchanges with the power grid AC. For example, the active power detector 16 measures the active power provided by the entire facility C (the power system stabilizer 10 and other electrical equipment 90) at the connection point between the transmission line of the power system AC and the power line of the facility C. do. In other embodiments, the active power detector 16 may measure the active power of the entire facility C on a bus line or main line of the power distribution system of the facility C.
  • the active power compensator 17 calculates a correction amount for correcting the compensation power provided by the power system stabilization device 10.
  • the calculation unit 12 calculates a corrected frequency command value based on the correction amount calculated by the active power compensator 17.
  • FIG. 4 shows an example in which an active power detector 16 and an active power compensator 17 are added to the configuration of the power system stabilizing device 10 according to the first embodiment (FIG. 1), It is not limited to this. In other embodiments, an active power detector 16 and an active power compensator 17 may be added to the configuration of the power system stabilizing device 10 (FIG. 2) according to the second embodiment.
  • the frequency command value f SV is determined based on the grid frequency f of the power grid AC.
  • a frequency command value f SV is determined based on the system frequency f of the power system AC and the active power exchanged with the power system AC.
  • the third embodiment is characterized by an active power compensator 17.
  • a model of the compensation power P ⁇ generated by the flywheel 14B with respect to the reference model frequency f is determined as a compensation power estimation function G(f).
  • the compensation power estimation function is, for example, the following equation (24).
  • the compensation power estimation function calculates the compensation power estimate P ⁇ based on the system frequency f, a differential value of f, an integral value of f, and a value obtained by filtering f with a transfer function. may be determined.
  • the facility C has at least one electrical equipment 90 that consumes active power.
  • the active power Pwhole measured at the connection point between the facility C and the power grid AC is the sum of the power consumption of all the facilities C.
  • the flywheel 14B generates compensation power based on the frequency of the power grid AC, and the power consumption of other electrical equipment in the facility C is as expected.
  • the frequency command f SV is corrected by ⁇ f SV2 , for example, by the following equation (25), based on the deviation of the active power P whole of the entire facility C with respect to the estimated value P ⁇ of the compensation power. do.
  • the estimated value P ⁇ of the compensation power is positive in the direction of supplying power to the power grid AC, and the effective power Pwhole of the entire facility C is also positive in the direction of supplying power to the power grid AC.
  • the correction amount ⁇ f SV2 output by the active power compensator 17 is obtained by amplifying the original correction amount ⁇ f SV1 when the active power P whole of the entire facility C is insufficient with respect to the estimated value P ⁇ of the compensation power.
  • the purpose is to bring the effective power P whole close to the estimated value P ⁇ of the compensation power.
  • the correction amount ⁇ f SV2 output from the active power compensator 17 acts to attenuate the original correction amount ⁇ f SV1 .
  • the attenuation may be limited as shown in the following equation (26).
  • the third embodiment is effective in a facility C having a plurality of electrical equipment 90.
  • the other electrical equipment 90 of the flywheel 14B also demands or supplies power, so the electrical equipment 90 other than the flywheel 14B can also generate compensation power in the same way as the flywheel 14B. This allows the entire facility to contribute to adjusting supply and demand.
  • the power system stabilizing device 10 determines a model G(f) of the compensation power of the flywheel 14B, and sets a frequency command value f so that the active power P whole of the entire facility C matches the model. By correcting the SV , it is possible to contribute to supply and demand adjustment for the entire facility.
  • FIG. 5 is a diagram showing the functional configuration of an air conditioner according to the fourth embodiment.
  • the air conditioner 20 includes an outdoor unit 21, an indoor unit 22, and a control device 23.
  • the outdoor unit 21 includes a compressor 210, an accumulator 211, a four-way valve 212, an outdoor blower fan 213, an outdoor heat exchanger 214, an outdoor expansion valve 215, a receiver 216, a pressure detector 217, and a variable speed A drive device 218 is provided.
  • the compressor 210 compresses the refrigerant R flowing between the outdoor unit 21 and the indoor unit 22 to generate a high-temperature, high-pressure gaseous refrigerant.
  • the accumulator 211 separates liquid refrigerant and gaseous refrigerant. Of the refrigerant R separated by the accumulator 211, only the gaseous refrigerant is sent to the compressor 210.
  • the four-way valve 212 switches the flow direction of the refrigerant R according to the operation mode (cooling operation or heating operation) of the air conditioner 20.
  • FIG. 5 illustrates the state of the four-way valve 212 during cooling operation.
  • the four-way valve 212 configures a refrigeration cycle S in which the refrigerant R discharged from the compressor 210 is sent to the outdoor heat exchanger 214 and the refrigerant R flows in the direction of the solid arrow.
  • the four-way valve 212 configures a refrigeration cycle S in which the refrigerant R discharged from the compressor 210 is sent to the indoor heat exchanger 221 of the indoor unit 22, and the refrigerant R flows in the direction of the dashed arrow.
  • the outdoor fan 213 sends outdoor air to the outdoor heat exchanger 214.
  • the outdoor heat exchanger 214 exchanges heat between the refrigerant R supplied inside and outdoor air.
  • the outdoor heat exchanger 214 functions as a condenser during cooling operation, and functions as an evaporator during heating operation.
  • the outdoor expansion valve 215 lowers the pressure of the refrigerant R condensed in the outdoor heat exchanger 214 during cooling operation to turn it into a low-pressure refrigerant R.
  • the receiver 216 temporarily stores the introduced liquid refrigerant R.
  • the pressure detector 217 measures the pressure (suction pressure) on the upstream side of the compressor 210.
  • variable speed drive device 218 controls the rotation speed of the compressor 210 by supplying power at a frequency specified by the control device 23 to the compressor 210. Further, the variable speed drive device 218 is also used as the power converter 13 of the power system stabilization device 10.
  • the indoor unit 22 includes an indoor ventilation fan 220, an indoor heat exchanger 221, and an indoor expansion valve 222.
  • the indoor ventilation fan 220 sends indoor air to the indoor heat exchanger 221.
  • the indoor heat exchanger 221 exchanges heat between the refrigerant R supplied inside and the indoor air.
  • the indoor heat exchanger 221 functions as an evaporator during cooling operation, and functions as a condenser during heating operation.
  • the indoor expansion valve 222 lowers the pressure of the refrigerant R condensed in the indoor heat exchanger 221 during heating operation to turn it into a low-pressure refrigerant R.
  • the control device 23 controls the operation of the outdoor unit 21 and the indoor unit 22 according to setting conditions such as the operating mode and temperature specified by the user.
  • FIG. 6 is a diagram showing the functional configuration of a control device and a power system stabilization device according to the fourth embodiment.
  • the control device 23 of the air conditioner 20 includes a target determining section 230 and a PI controller 231.
  • the target determining unit 230 determines a target value P s0 of the suction pressure of the compressor 210 of the outdoor unit 21 based on setting conditions specified by the user. Determining the target value P s0 of the suction pressure is equivalent to determining the target value of the cooling/heating output of the air conditioner 20.
  • the PI controller 231 calculates the rotation speed command value of the compressor 210 based on the deviation ⁇ P s between the target value P s0 of the suction pressure and the current suction pressure P s detected by the pressure detector 217 .
  • FIG. 6 shows an example in which the power system stabilizing device 10 is provided inside the control device 23 of the air conditioner 20, the present invention is not limited to this. In other embodiments, the power system stabilizing device 10 may be provided outside the control device 23.
  • the target value P s0 of the suction pressure is an example of the target value of the cooling/heating output of the air conditioner 20, and is not limited to this.
  • the power system stabilization device 10 includes a frequency detector 11, a calculation unit 12, and a power converter 13.
  • the function of the frequency detector 11 is the same as in the first embodiment. Further, the power system stabilizing device 10 uses the variable speed drive device 218 of the outdoor unit 21 as the power converter 13.
  • the calculation unit 12 calculates a frequency command value obtained by correcting the rotation speed command value calculated by the PI controller 231 of the control device 23 in proportion to the fluctuation of the grid frequency f of the power grid AC, and transmits the frequency command value to the power converter 13. Output.
  • a pressure detector 217 that measures the suction pressure of the compressor 210 is disposed.
  • the cooling output of the air conditioner 20 can be approximately measured by the suction pressure of the compressor 210.
  • the configuration of the control device 23 shown in FIG. 6 is a control system that controls the suction pressure Ps of the compressor 210.
  • the target determining unit 230 determines a target value P s0 of the suction pressure P s so as to satisfy conditions set by the user such as temperature.
  • the PI controller 231 calculates a rotation speed command value for the compressor 210 that reduces the deviation ⁇ P s between the target value P s0 and the detected value P s of the pressure detector 217.
  • variable speed drive device 218 of the compressor 210 When the variable speed drive device 218 of the compressor 210 is controlled based on this rotation speed command value, the cycle state of the refrigeration cycle S changes, and the suction pressure P s is controlled so as to approach the target value P s0 .
  • the method for calculating the target value P s0 and the rotational speed command value is already known, so the explanation thereof will be omitted.
  • variable speed drive device 218 is utilized in the compressor 210 of the refrigeration cycle S of the air conditioner 20.
  • the rotation speed of the compressor 210 is changed by the variable speed drive device 218, the temperature of the refrigerant discharged by the compressor 210 responds to the rotation speed without delay.
  • the temperature of the room does not respond instantaneously to changes in the compressor rotation speed.
  • the power system stabilizing device 10 according to the fourth embodiment provides compensation power P by utilizing this response delay.
  • the first high-pass filter 121 is used to achieve the original purpose of the air conditioner 20, which is to adjust the room temperature, by limiting the provision of compensation power to high frequency components with a period shorter than one minute, for example. This is to avoid any negative effects.
  • the calculation unit 12 calculates the correction amount of the rotation speed command value by performing the same calculation as in the first embodiment on the extracted high frequency component. The calculation unit 12 adds the calculated correction amount to the rotation speed command value calculated by the PI controller 231 of the control device 23, and sends the frequency command value to the power converter 13 (variable speed drive device 218 of the outdoor unit 21). Output.
  • the compensation power P according to the fourth embodiment is expressed by the following equation (27).
  • the power system stabilizing device 10 can cause the variable speed drive device 218 of the compressor 210 of the air conditioner 20 to function as a stabilizing device for the power system AC. .
  • the power system stabilizing device 10 into the air conditioner 20, the function of suppressing (stabilizing) the frequency fluctuations of the power system AC is added to the air conditioner 20, which is an existing electrical equipment in homes and offices. can do.
  • FIG. 6 shows a configuration example in which the power system stabilizing device 10 according to the first embodiment is applied to the air conditioner 20, the present invention is not limited to this. In other embodiments, the power system stabilizing device 10 according to the second or third embodiment may be applied to the air conditioner 20.
  • FIG. 7 is a diagram showing the functional configuration of the power system stabilization device according to the fifth embodiment.
  • the power system stabilizing device 10 according to the fifth embodiment has the point that the calculation unit 12 corrects the target value P s0 of the suction pressure of the compressor 210 in proportion to fluctuations in the system frequency f.
  • This embodiment is different from the fourth embodiment.
  • variable speed drive device of the compressor 210 of the air conditioner 20 functions as a stabilizing device for the power system AC. Since the compressor 210 of the home air conditioner 20 has a limited range of rotational speeds that can be operated, for example, if the positive compensation power is sustained, the rotational speed of the compressor 210 will quickly reach the lower limit value. I end up. Since the compressor 210 of the home air conditioner 20 has a small inertia rate, the total amount of compensation power that can be provided until the lower limit is reached is also limited. Based on this, in the fifth embodiment, by adjusting the heating or cooling capacity in addition to the rotation speed of the compressor 210, continuous compensation power can be provided.
  • the rotation speed of the compressor 210 is changed to make the heating or cooling ability variable.
  • the calculation unit 12 of the power system stabilizing device 10 according to the fifth embodiment includes a second high-pass filter 122.
  • the rotation speed of the compressor 210 is further adjusted based on the output signal. For example, the calculation unit 12 adjusts the rotation speed of the compressor 210 by correcting the suction pressure target value P s0 input to the PI controller 231 .
  • the cut-off angular velocity 1/ ⁇ 2 [rad/s] of the second high-pass filter 122 is set smaller than the cut-off angular velocity 1/ ⁇ [rad/s] of the first high-pass filter 121 of the fourth embodiment.
  • the rotation speed of the compressor 210 is made to respond to fluctuations in a low frequency band (ie, continuous fluctuations) of the system frequency f. Since the power consumption of the compressor 210 has a positive correlation with the rotation speed of the compressor 210, when the system frequency f increases, the power consumption of the compressor 210 increases, and it is applied as a negative compensation power P to the power system AC. act.
  • the power system stabilizing device 10 according to the fifth embodiment can continuously exert compensation power.
  • power consumed or supplied when the kinetic energy of a rotating machine increases or decreases with a change in its rotation speed is used as compensation power P to power the power system.
  • a technology used to stabilize AC In particular, using the power converter 13, when the frequency of the power grid AC fluctuates, the rotation speed of the rotating machine is changed more than the frequency that fluctuates in synchronization with the frequency of the power grid AC, and the inertia rate is equivalently increased. disclosed a technology to increase
  • the power system stabilizing device 10 is applied to electrical equipment that does not have a rotating machine.
  • FIG. 8 is a diagram showing the functional configuration of an electric furnace system and a power system stabilizing device according to the sixth embodiment.
  • the electric furnace system 30 is an embodiment of electrical equipment that does not include a rotating machine.
  • the electric furnace system 30 includes a control device 31 and an electric furnace device 32.
  • the electric furnace device 32 includes an AC power regulator 320, an induction winding 321, an electric furnace 322, and a temperature detector 323.
  • the AC power regulator 320 supplies AC power to the induction winding 321. Further, the AC power regulator 320 is also used as the power converter 13 of the power system stabilization device 10. Note that in the electric furnace 322, unlike a rotating machine, there is no need to adjust the output frequency, so the power converter 13 (AC power regulator 320) according to this embodiment does not need to have a frequency adjustment circuit. . Therefore, AC power regulator 320 is configured only with an AC power adjustment circuit such as a thyristor regulator, for example.
  • the induction winding 321 When AC power is supplied, the induction winding 321 generates an alternating magnetic field within the electric furnace 322 to increase the temperature inside the electric furnace 322.
  • the temperature detector 323 measures the temperature inside the electric furnace 322.
  • the control device 31 includes a target determining section 310 and a PI controller 311.
  • the target determining unit 310 determines a temperature set value TSV of the electric furnace 322.
  • the PI controller 311 calculates a command value for the power that the AC power regulator 320 supplies to the induction winding 321 so that the temperature of the electric furnace 322 approaches the temperature set value TSV .
  • FIG. 8 shows an example in which the power system stabilizing device 10 is provided inside the control device 31 of the electric furnace system 30, the present invention is not limited to this. In other embodiments, the power system stabilizing device 10 may be provided outside the control device 31.
  • the power system stabilization device 10 includes a frequency detector 11, a calculation unit 12, an active power detector 16, and an active power compensator 17.
  • the functions of the frequency detector 11 and the active power detector 16 are the same as in each of the embodiments described above.
  • the active power compensator 17 calculates the correction amount P ⁇ 1 based on the active power P whole of the entire facility C in which a plurality of electrical equipment including the electric furnace system 30 is installed.
  • the calculation unit 12 calculates the AC power regulator 320 (power converter 13), calculate the frequency command value of the AC power supplied to the induction winding 321 of the electric furnace 322.
  • the AC power regulator 320 adjusts the AC power output to the induction winding 321 based on the frequency command value calculated by the calculation unit 12.
  • AC power regulator 320 supplies AC power to induction winding 321 .
  • Induction winding 321 generates an alternating magnetic field within electric furnace 322 .
  • the temperature TPV in the electric furnace 322 is measured by a temperature detector 323.
  • a set value TSV is determined in advance by the target determining unit 310 of the control device 31.
  • the AC power regulator 320 adjusts the AC power supplied to the induction winding 321 according to a command value calculated by the PI controller 311 based on the deviation between the set value TSV and the temperature TPV in the electric furnace 322, for example.
  • the calculation unit 12 calculates the estimated value of the compensation power P using the compensation power model G in FIG. Its value is P ⁇ 1.
  • the active power compensator 17 inputs, for example, the active power P whole that the entire facility C exchanges with the power grid AC. Like the compensation power P, the active power P whole has a positive direction in which it is supplied to the power grid AC. Then, the active power compensator 17 filters P whole with the third high-pass filter 171 to extract a fluctuation component of P whole , and calculates a correction amount P based on the deviation between the fluctuation component of P whole and the compensation power model G. Output ⁇ 2. The calculation unit 12 subtracts the sum of the estimated value P ⁇ 1 of the compensation power and the correction amount P ⁇ 2 from the output of the PI controller 311 for temperature control to calculate the frequency command value of the AC power regulator 320. .
  • the second high-pass filter 122 is for generating compensation power for persistent deviations in the grid frequency of the power grid AC. This is similar to the fifth embodiment.
  • the power system stabilizing device 10 uses electrical equipment (for example, the electric furnace 322) that does not have a rotating machine to stabilize the power system according to the frequency fluctuations of the power system AC. It becomes possible to provide compensation power P.
  • electrical equipment for example, the electric furnace 322
  • the present invention is not limited to this.
  • the power system stabilizing device 10 may be applied to the storage battery system 40.
  • the electric furnace system 30 is an embodiment of electrical equipment that does not include a rotating machine.
  • FIG. 9 is a diagram showing the functional configuration of a storage battery system and a power system stabilization device according to a modification of the sixth embodiment.
  • the storage battery system 40 includes a control device 41 and a storage battery device 42.
  • the storage battery device 42 includes a forward converter 420, a storage battery 421, and a current detector 422.
  • the forward converter 420 is, for example, a rectifier.
  • the forward converter 420 converts AC power into DC power and supplies the DC power to the storage battery 421 . Further, the forward converter 420 is also used as the power converter 13 of the power system stabilization device 10.
  • the storage battery 421 stores electricity using the DC power supplied from the forward converter 420.
  • the current detector 422 measures the current I PV that the storage battery 421 charges and discharges.
  • FIG. 9 shows the control system in the current control mode at the initial stage of charging.
  • the voltage of the storage battery 421 is low, so current control is performed to avoid damage to the storage battery 421 due to overcurrent.
  • a current set value ISV is determined in advance by the target determining unit 410 of the control device 41.
  • the forward converter 420 (power converter 13) supplies direct current to the storage battery 421 according to a command value calculated by the PI controller 411 based on the deviation between the set value ISV and the current IPV detected by the current detector 422, for example. Adjust the current.
  • the active power compensator 17 of the power system stabilization device 10 calculates the correction amount P ⁇ 2 based on the deviation between the fluctuation component of the active power P whole of the entire facility C and the compensation power model G, as in the sixth embodiment. Output.
  • the calculation unit 12 inputs the deviation of the system frequency into the compensation power model G and calculates the estimated value P ⁇ 1 of the compensation power. Furthermore, the calculation unit 12 subtracts the sum of the estimated value P ⁇ 1 of the compensation power and the correction amount P ⁇ 2 from the output of the PI controller 411 to calculate the current command value to be output to the forward converter 420.
  • the power system stabilizing device 10 can use the storage battery 421 to provide compensation power P according to frequency fluctuations of the power system AC.
  • FIG. 10 is a schematic block diagram showing the configuration of a computer according to at least one embodiment.
  • the computer 90 includes a processor 91, a main memory 92, a storage 93, and an interface 94.
  • the above-described power system stabilizing device 10, control device 23 of the air conditioner 20, control device 31 of the electric furnace system 30, and control device 41 of the storage battery system 40 are each implemented in the computer 90.
  • the operations of each processing section described above are stored in the storage 93 in the form of a program.
  • the processor 91 reads the program from the storage 93, expands it into the main memory 92, and executes the above processing according to the program. Further, the processor 91 reserves storage areas corresponding to each of the above-mentioned storage units in the main memory 92 according to the program.
  • the program may be one for realizing a part of the functions to be performed by the computer 90.
  • the program may function in combination with other programs already stored in storage or in combination with other programs installed in other devices.
  • the computer may include a custom LSI (Large Scale Integrated Circuit) such as a PLD (Programmable Logic Device) in addition to or in place of the above configuration.
  • PLDs include PAL (Programmable Array Logic), GAL (Generic Array Logic), CPLD (Complex Programmable Logic Device), FPGA (Field Programmable Gate Array), and the like.
  • PLDs Programmable Logic Device
  • PAL Programmable Array Logic
  • GAL Generic Array Logic
  • CPLD Complex Programmable Logic Device
  • FPGA Field Programmable Gate Array
  • Storage 93 examples include HDD (Hard Disk Drive), SSD (Solid State Drive), magnetic disk, magneto-optical disk, CD-ROM (Compact Disc Read Only Memory), and DVD-ROM (Digital Versatile Disc Read Only Memory). , semiconductor memory, etc.
  • Storage 93 may be an internal medium connected directly to the bus of computer 90, or may be an external medium connected to computer 90 via an interface 94 or a communication line. Furthermore, when this program is distributed to the computer 90 via a communication line, the computer 90 that received the distribution may develop the program in the main memory 92 and execute the above processing.
  • storage 93 is a non-transitory, tangible storage medium.
  • the power system stabilizing device 10 includes a frequency detector 11 that detects the system frequency of the AC power system AC, and a frequency detector 11 that detects the system frequency of the AC power system AC, and a frequency detector 11 that detects the system frequency of the AC power system AC, and An electric power unit that is provided between the arithmetic unit 12 that calculates a frequency command value for adjusting the rotation speed and the AC power system and the rotating machine 14, 210, and that adjusts the rotation speed of the rotating machine 14, 210 based on the frequency command value.
  • a converter 13 is provided.
  • the power system stabilizing device 10 can provide compensation power P according to the system frequency.
  • the rotating machine 14 functions as a flywheel 14B, an electric motor that drives the flywheel 14B, and It has an electric motor 14A that functions as a generator driven by the kinetic energy accumulated in the flywheel 14B, and the calculation unit 12 adjusts the frequency so that the angular velocity of the flywheel 14B increases or decreases in proportion to the system frequency. Calculate the command value.
  • the power system stabilizing device 10 can increase the inertia of the flywheel 14B by changing the angular velocity of the flywheel 14B using the power converter 13. Therefore, the power system stabilizing device 10 can provide large compensation power P even if a small flywheel is used. Thereby, the power system stabilizing device 10 can be downsized, and can be applied to facilities such as homes and offices that do not have space to install a large device.
  • the power system stabilizing device 10 sets the upper limit or lower limit of the time rate of change of the frequency command value between the frequency command value and the AC power system AC. It further includes a compensation power limiter 15 that is determined based on the deviation from the reference frequency.
  • the power system stabilizing device 10 allows the power running power when accelerating the flywheel 14B at startup, or the regenerated power when decelerating the flywheel 14B at the time of stopping to disturb the power system AC. can be suppressed.
  • the calculation unit 12 performs control to determine the reference angular velocity ⁇ ref or compensation power of the flywheel 14B.
  • a constant k f is determined based on the magnitude of the rate of change of the frequency command value.
  • the power system stabilizing device 10 can increase the utilization rate of the capacity of the power converter 13. As a result, the power system stabilizing device 10 can operate without excessively surplus or insufficient capacity of the power converter 13.
  • the rotating machine is the compressor 210 of the air conditioner 20
  • the calculation unit 12 is the compressor 210 of the air conditioner 20.
  • a frequency command value is calculated by correcting the rotation speed command value outputted by the control device 23 of No. 20 in proportion to the fluctuation of the system frequency.
  • the power system stabilizing device 10 can cause the variable speed drive device 218 of the compressor 210 of the air conditioner 20 to function as a stabilizing device for the power system AC.
  • the power system stabilizing device 10 into the air conditioner 20, the function of suppressing (stabilizing) the frequency fluctuations of the power system AC is added to the air conditioner 20, which is an existing electrical equipment in homes and offices. can do.
  • the calculation unit 12 has a target output of the air conditioner 20 used for calculating the rotation speed command value.
  • the value P s0 is further corrected in proportion to the variation in the system frequency.
  • the power system stabilizing device 10 can continuously exert compensation power.
  • the power system stabilization device 10 is installed in a facility C having the power system stabilization device 10 and the electrical equipment 90. , an active power detector 16 that detects the active power that the entire facility C exchanges with the AC power system AC, and an active power compensator 17 that calculates the correction amount of the frequency command value based on the active power. Furthermore, the calculation unit 12 calculates a frequency command value based on the system frequency of the AC power system AC and the correction amount.
  • the power system stabilizing device 10 can contribute to supply and demand adjustment throughout the facility.
  • the power system stabilizing device 10 is provided between the AC power system AC and the electrical equipment 30, 40, and the electrical equipment 30, 40 is provided with AC power or DC power.
  • a frequency detector 11 that detects the system frequency of the AC power system AC, and a frequency detector 11 that detects the system frequency of the AC power system AC, and a frequency command value of the AC power to be supplied to the electrical equipment 30, 40 or a frequency command value of the DC power, based on the system frequency. It includes a calculation unit 12 that calculates a current command value and outputs it to the power converter 13.
  • the power system stabilizing device 10 uses electrical equipment that does not have a rotating machine (for example, an electric furnace 322, a storage battery 421) to generate compensation power P according to frequency fluctuations in the power system AC. It becomes possible to provide electrical equipment that does not have a rotating machine (for example, an electric furnace 322, a storage battery 421) to generate compensation power P according to frequency fluctuations in the power system AC. It becomes possible to provide electrical equipment that does not have a rotating machine (for example, an electric furnace 322, a storage battery 421) to generate compensation power P according to frequency fluctuations in the power system AC. It becomes possible to provide
  • the power system stabilization method includes the step of detecting the system frequency of the AC power system AC, and adjusting the rotation speed of the rotating machine 14, 210 based on the system frequency.
  • the method includes a step of calculating a frequency command value, and a step of adjusting the rotation speed of the rotating machine 14, 210 based on the frequency command value.
  • the program includes the step of detecting the system frequency of the AC power system AC, and the step of determining a frequency command value for adjusting the rotation speed of the rotating machine 14, 210 based on the system frequency.
  • the power system stabilizing device is caused to perform the step of calculating and the step of adjusting the rotation speed of the rotating machine based on the frequency command value.
  • Air conditioner 21 Outdoor unit 210 Compressor (rotating machine) 217 Pressure detector 218 Variable speed drive device (power converter) 22 Indoor unit 23 Control device 230 Target determination unit 231 PI controller 30 Electric furnace system (electrical equipment) 31 Control device 310 Target determining unit 311 PI controller 32 Electric furnace device 320 AC power regulator (power converter) 321 Induction winding 322 Electric furnace 323 Temperature detector 40 Storage battery system (electrical equipment) 41 Control device 410 Target determination unit 411 PI controller 42 Storage battery device 420 Forward converter (power converter) 421 Storage battery 422 Current detector

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Supply And Distribution Of Alternating Current (AREA)
  • Control Of Eletrric Generators (AREA)

Abstract

L'invention concerne un dispositif de stabilisation de réseau à puissance électrique qui comprend : un détecteur de fréquence qui détecte une fréquence de réseau d'un réseau à puissance électrique CA ; une unité de calcul qui calcule, sur la base de la fréquence de réseau, une valeur de commande de fréquence pour régler une vitesse de rotation d'une machine rotative ; et un convertisseur de puissance électrique qui est disposé entre le réseau à puissance électrique CA et la machine rotative, le convertisseur de puissance électrique ajustant la vitesse de rotation de la machine rotative sur la base de la valeur de commande de fréquence.
PCT/JP2023/005550 2022-05-13 2023-02-16 Dispositif de stabilisation de réseau à puissance électrique, procédé de stabilisation de réseau à puissance électrique et programme WO2023218718A1 (fr)

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JP2022079453A JP2023167910A (ja) 2022-05-13 2022-05-13 電力系統安定化装置、電力系統安定化方法、およびプログラム
JP2022-079453 2022-05-13

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Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0595700A (ja) * 1991-09-30 1993-04-16 Okinawa Denryoku Kk フライホイール発電機の制御装置
JP2002044867A (ja) * 2000-07-21 2002-02-08 Hitachi Ltd 電力変換器装置
JP2015104209A (ja) * 2013-11-25 2015-06-04 サンケン電気株式会社 電力平準化装置

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0595700A (ja) * 1991-09-30 1993-04-16 Okinawa Denryoku Kk フライホイール発電機の制御装置
JP2002044867A (ja) * 2000-07-21 2002-02-08 Hitachi Ltd 電力変換器装置
JP2015104209A (ja) * 2013-11-25 2015-06-04 サンケン電気株式会社 電力平準化装置

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