JP2006320175A - Power system linkage device system - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To realize stable power flow control with a rotary phase adjuster when the frequency difference between two mutually connecting systems is large, when a high speed power flow control is executed, and furthermore even when a system trouble occurs at a closest point at a connecting part. <P>SOLUTION: The controller controlling the rotary phase adjuster uses as an input signal a power flow target value between a first AC power system and a second AC power system, the rotating speed of the rotor of the rotary phase adjuster, the power flow between the first AC power system and the second AC power system, the frequency of the first AC power system, and the frequency of the second AC power system, and outputs a rotating speed command value of the rotor of the rotary phase adjuster and a torque command value for rotary driving the rotor. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a power grid interconnection device system that is coupled between power grids and controls a power flow between the power grids.

  Conventionally, a rotary transformer or a three-phase induction voltage regulator has been used as a power flow controller that is connected in series between a power transmission unit and a power reception unit of an AC power system and adjusts the power flow between the power transmission unit and the power reception unit. Yes.

  As a power flow controller using a rotary transformer, first and second electrical systems having electrical characteristics having different frequencies or phases are interconnected by a rotary transformer, and the second electrical system is connected to the second electrical system. When measuring the power transmitted to the system and controlling the measured power to be balanced with the command power, the command power is compared with the measured power, and the angular velocity command signal of the rotor of the rotary transformer according to the deviation value In addition, the measured angular velocity signal of the rotor of the rotary transformer is compared with the angular velocity command signal, and an AC machine driving torque capable of operating the rotor bidirectionally at a variable speed is generated according to the deviation value. Some adjust the rotational angle position of the rotor with respect to the stator of the transformer (see, for example, Patent Documents 1 and 2).

In addition, as a power flow controller using a three-phase induction voltage regulator, a three-phase induction voltage regulator is coupled to a power system having a different phase and frequency for power flow control of a power system having a different frequency and phase. In addition, there is one in which the voltage phase is continuously changed by 360 degrees or more to perform the rotational torque control of the three-phase induction voltage adjusting device, and can be linked to a power system having a difference in phase and frequency of the power system (see Patent Document 3). ).
JP-A-9-23587 JP 9-23651 A JP 2001-95155 A

  By using a rotary phase adjuster such as the above-mentioned rotary transformer or three-phase induction voltage regulator, it is possible to perform power flow control by asynchronously connecting power systems with different frequencies and phases. It is.

  However, the power flow control method using a rotary phase adjuster such as the above-described rotary transformer or three-phase induction voltage regulator is theoretically valid, but the frequency difference between two interconnected systems is large. In other cases or when trying to realize high-speed power flow control, there has been a practical problem that stable power flow control becomes difficult.

  Also, when different systems are interconnected by a rotary phase adjuster such as the above-described rotary transformer or three-phase induction voltage regulator, there is still a control method when a system failure occurs at the closest point of the connection. Not proposed.

  Therefore, in the present invention, when the frequency difference between two interconnected systems is large, or when high-speed power flow control is performed, the rotary phase adjuster such as the above-described rotary transformer or three-phase induction voltage regulator is used. Stable power flow control can be realized by the above, and when the above-mentioned rotary phase adjuster is connected to realize stable power flow control, even if a system failure occurs near the connection point, An object of the present invention is to provide a power grid interconnection device system capable of controlling a phase adjuster.

  In order to achieve the above object, a power system interconnection device system according to the present invention includes a rotary phase adjuster coupled to a first AC power system and a second AC power system, and the rotary phase adjuster. A power system comprising a control device for a rotary phase adjuster that controls the power flow between the first AC power system and the second AC power system by controlling the rotational torque and rotational speed of the rotor. In the interconnection system, the controller of the rotary phase adjuster includes a target power flow value between the first AC power system and the second AC power system, and a rotor of the rotary phase adjuster. Rotational speed, power flow between the first AC power system and the second AC power system, the frequency of the first AC power system, and the frequency of the second AC power system are input signals. The rotor of the rotary type phase adjuster A rotation speed command value, and outputs a torque command value for rotating the rotor.

  According to the power grid interconnection device system of the present invention, stable power flow control can be realized even when the frequency difference between two interconnected systems is large or when high-speed power flow control is performed.

  An embodiment according to the present invention will be described with reference to FIGS.

  FIG. 1 is a configuration diagram of a power system interconnection device 3 and a control device 4 of the power system interconnection device 3 connected between a first AC power system 1 and a second AC power system 2. The power grid interconnection device system of the present invention is composed of a power grid interconnection device 3 and a control device 4.

  The power system interconnection device 3 is connected to the first AC power system 1 by a three-phase AC line 11 and is connected to the second AC power system 2 by a three-phase AC line 21. The first AC power system 1 and the second AC power system 2 may have electrical characteristics with different frequencies and phases.

  The power grid interconnection device 3 includes a rotary phase adjuster 31, a rotor 31a and a stator 31b, a driving device 32 that drives the rotor 31a, and a power regenerator 33.

  The control device 4 of the power grid interconnection device 3 substantially controls the drive device 32 that drives the rotor 31a of the rotary phase adjuster 31.

  As described above, the rotary phase adjuster 31 is a rotary transformer and a three-phase induced voltage regulator. The structure of the rotor 31a and the stator 31b of the rotary phase adjuster 31 is the same as that of the winding induction motor. The rotor 31a of the rotary phase adjuster 31 is connected to the second AC power system 2, and the stator 31b of the rotary phase adjuster 31 is connected to the first AC power system 1, but the rotation The child 31a may be connected to the first AC power system 1 and the stator 31b may be connected to the second AC power system 2.

  The drive device 32 has a rotating shaft of the motor of the drive device 32 coupled to the rotor 31a. When the torque command value Tref is given to the torque control unit in the drive device 32, the drive device 32 generates torque equivalent to the torque command and rotates. The child 31a is rotationally driven. The motor of the driving device 32 may be any appropriate driving mechanism. Further, a link mechanism such as a gear device may be connected to the rotation shaft of the electric motor and the rotor 31a.

  The power regenerator 33 removes the mechanical power of the rotating shaft between the rotor 31a and the drive device 32 from the sum of the power wattage of the power supplied to the rotor 31a and the power supplied to the stator 31b. At least a part is regenerated in the three-phase AC line 11 or 21. If a converter is used as the power regenerator 33, the flexibility of the magnitude and direction of the regenerative power is increased. The power regenerator 33 is connected to the driving device 32 and the three-phase AC line 21, but may be connected to the three-phase AC line 11.

The operation principle of the rotary phase adjuster 31 is shown below.
When the effective power input from the primary side of the rotary phase adjuster 31 is Pa, and the effective power output from the secondary side is Pb, the electrical rotation speed ω of the rotor 31a and the torque T driving the rotor 31a are:
From the power relationship,
Pa = Pb + ω × T (1)
It is.
When the angular frequency on the primary side is ω1 (frequency is f1) and the angular frequency on the secondary side is ω2 (frequency is f2), the angular frequency difference is the electrical rotational speed ω of the rotor 31a.
ω1 = ω2 + ω (2)
It becomes.
From the relationship between the primary side active power Pa and the torque T,
Pa = ω1 × T = (ω2 + ω) × T (3)
When substituting equation (3) into equation (1), the active power Pb on the secondary side is
Pb = ω2 x T (4)
It becomes.

  Even if there is a frequency difference between the primary side and secondary side terminals according to the expressions (1) to (4), the active power Pb on the secondary side can be controlled by the torque T, and the rotor 31a It turns out that it rotates with the rotational speed (omega) corresponding to a frequency difference.

  In order to rotate the rotor 31a at the torque T and the rotation speed ω, the driving device 32 is required to have an effective power Pr = ω × T. This active power Pr can be freely accommodated from the AC power system by the power regenerator 33.

  Thus, the rotary phase adjuster 31 can be connected to the grid between the first AC power system 1 and the second AC power system 2 having different electrical characteristics, and by torque control of the rotor 31a. The power flow between the first AC power system 1 and the second AC power system 2 can be controlled.

  The control device 4 of the power grid interconnection device 3 controls the drive device 32, and includes a power flow controller 41 and a speed controller 42, and sends a torque command value Tref to the drive device 32. Output.

  The power flow controller 41 includes a power meter 91 that measures the passing active power P1 in the three-phase AC line 11, a frequency detector 92a that measures the frequency f1 of the first AC power system 1, and the three-phase AC line 21. Are connected to a frequency detector 92b that measures the frequency f2 of the second AC power system 2 and a control command device 5 that outputs a power flow command value Pref, and outputs a rotation speed command value ωref of the rotor 31a. .

  The speed controller 42 receives the output ωref of the power flow controller 41 as an input signal, and is connected to an angular speed detector 93 that measures the rotational speed ω of the rotor 31a. Output Tref.

  First, in the power flow controller 41, the passing active power P1 measured via the power meter 91 in the three-phase AC line 11 and the frequency f1 of the first AC power system 1 measured via the frequency detector 92a. And the frequency f2 of the second AC power system 2 measured through the frequency detector 92b in the three-phase AC line 21 and the power flow command value Pref set and held by the control command device 5 are input as input signals. . Then, the power flow controller 41 generates a rotation speed command value ωref of the rotor 31a based on these input signals, and outputs the generated rotation speed command value ωref.

  Next, the output ωref of the power flow controller 41 and the rotational speed ω of the rotor 31a measured by the angular velocity detector 93 are input to the speed controller 42 as input signals. The speed controller 42 generates a torque command value Tref based on the input signal, and outputs the generated torque command value Tref to the drive device 32.

  As a result, the rotor 31a of the rotary phase adjuster 31 is rotated by the driving device 32 at a rotational speed ω to give an angular frequency difference between the two AC power systems 1 and 2 to ω (= 2π × | f1−f2 |) is possible, and the driving device 32 can generate the torque T to adjust the effective power P1 that is compatible between the two power systems.

  In other words, the power flow controller 41, the speed controller 42, and the rotary phase adjuster 31 are used to asynchronously link the first AC power system 1 and the second AC power system 2 having different electrical characteristics. Control becomes possible.

  As described above, the torque command value Tref that should be generated by the drive device 32 is output as the output of the control device 4 of the power grid interconnection device 3, but the control target is to realize asynchronous interconnection. The rotational speed ω of the rotor 31a (same as ω in the formulas (1) and (2)) and the torque T (the formula (3) and the formula necessary for controlling the power flow P1 of the three-phase AC lines 11 and 21) There are two types of (4) (same as T in ω2 × T). These two controlled objects are simultaneously realized by one control amount called the torque T generated by the drive device 32.

  By the way, in such a control system, as described below, instability of the control system occurs.

  Independently adjusting and setting the response speed of the power flow control and the response speed of the rotation speed of the rotor 31a, that is, adjusting the response speeds of the power flow control and the rotation speed control of the rotor 31a individually. Is difficult.

  When the absolute value | f1−f2 | of the frequency difference between the first AC power system 1 and the second AC power system 2 is large, the rotational speed ω of the rotor 31a expressed by the equation (2) increases. . In order to increase the value of ωref output according to Pref-P by the power flow controller 41 for power flow control, the gain of the PI controller 44b in the power flow controller 41 must be increased. .

  Generally, since the control system becomes unstable by increasing the gain of the control system, if the gain of the PI controller 44b is increased, the control device 4 of the power grid interconnection device 3 becomes unstable.

  Here, since the frequency in the commercial system is controlled to about ± 0.5 Hz with respect to the fundamental frequency, the maximum frequency difference between the two systems is about 1 Hz.

  On the other hand, even in the power flow control by the rotary phase adjuster 3 between power systems having the same fundamental frequency and different phases, when high-speed power flow control is performed, if the gain of the power flow controller 41 is increased, As described above, the control system becomes unstable.

  Therefore, in the first embodiment of the present invention, in order to eliminate the instability of the control system, a speed FF control unit 43 is provided inside the power flow controller 41 as shown in FIG.

FIG. 2 shows an internal configuration of the power flow controller 41.
The power flow controller 41 includes a power FB (feedback) control unit 44 and a speed FF (feed forward) control unit 43.

  The power FB control unit 44 subtracts the passing active power P1 value measured by the power measuring device 91 from the power flow command value Pref set in the control command device 5, and the output of the subtractor 44a is an input signal. Are input as a proportional integral (PI) controller 44b, an adder 44c that adds the output of the PI controller 44b and the output of the speed FF control unit 43, and the output of the adder 44c is limited to the set range and output. The limiter 44d.

  With reference to FIG. 2, an example of the flow of the control means of the control device of the power grid interconnection device system of the present invention will be described.

  First, the primary side terminal and the secondary side terminal of the rotary phase adjuster 31 are connected to asynchronous first and second AC power systems 1 and 2 having different frequencies and phases, and the AC power system 1 , 2 are linked.

  Next, in order to perform power flow control between the first AC power system 1 and the second AC power system 2, the rotor 31a is rotated at a rotational speed ω corresponding to the frequency difference between the primary side and the secondary side. Rotation drive control.

  As described below, the torque T of the drive device 32 is controlled, and the power flow between the first AC power system 1 and the second AC power system 2 is equal to the desired power flow Pref set by the control command unit 5. Control to be.

  That is, the speed controller 42 outputs the torque Tref to the drive device 32 using the control command unit 5, the power FB control unit 44 in the power flow controller 41 and the speed controller 42.

  Next, the control command device 5 inputs the data of the power flow command value Pref and sets the power flow command value Pref. The control command device 5 may be located away from the control device 4 of the power grid interconnection device system.

  Next, the power FB control unit 44 in the power flow controller 41 receives the power flow command value Pref and the power flow P1 measured by the power measuring device 91 as input signals in order to generate the rotation speed command value ωref. The difference Pref−P1 is calculated by the subtractor 44a. The calculated Pref-P1 value is sent to the PI controller 44b composed of a gain element and an integrator element, and an amount corresponding to the Pref-P1 value is output. When the output of the speed FF control unit 43 in the power flow controller 41 is 0, the output of the PI controller 44b is limited within the range of the upper and lower limit values set by the limiter element 44d, and the rotational speed command value It is output from the power FB control unit 44 as ωref. At this time, the limiter element 44d sets allowable upper and lower limit values of the rotational speed ω of the rotor 31a.

  The speed FF control unit 43 includes the frequency f1 of the AC power system 1 detected from the three-phase AC line 11 via the frequency detector 92a, and the AC power system detected from the three-phase AC line 21 via the frequency detector 92b. A frequency f2 of 2 is input as an input signal. The subtractor 43a of the speed FF control unit 43 obtains a difference f1-f2 between the input frequency f1 and frequency f2. The f1-f2 is multiplied by a positive or negative constant set by the gain 43b, and then output from the speed FF control unit 43 and input to the power FB control unit 44. The adder 44c outputs the PI controller 44b. Is added.

  According to such a configuration, the speed FF control unit 43 causes the rotor 31a of the rotary phase adjuster 3 according to the frequency difference f1-f2 between the first AC power system 1 and the second AC power system 2 to be adjusted. The rotational speed ω can be calculated and added to the output of the PI controller 44b in the power FB control unit 44, and the gain of the PI control unit 44b in the power FB control unit 44 can be reduced.

  Therefore, even when the frequency difference between the two systems connected to the rotary phase adjuster 3 is large, the gain of the PI control unit 44b in the power FB control unit 44 can be reduced, thereby realizing stable power flow control. can do.

  FIG. 3 shows a configuration of the speed FF control unit 43 different from FIG. The difference from the speed FF control unit 43 in FIG. 2 is that the output of the gain 43b of the speed FF control unit 43 is output to the adder 44c of the power FB control unit 44 via the delay element 43c.

  According to such a configuration, the response speed of the speed FF control unit 43 can be adjusted by adjusting the time constant of the delay element 43c. Since the response speed of the speed FF control unit 43 can be adjusted independently of the response speed of the speed controller 42, the response speed of the control system can be easily adjusted and stable power flow control can be realized.

  FIG. 4 shows a configuration of the speed FF control unit 43 different from FIG. 2 or FIG. The difference from the speed FF control unit 43 in FIG. 3 is that, in the speed FF control unit 43 in FIG. 3, one of the two signals input to the subtractor 43a is a constant value set by the constant setting element 43d. .

  In this case, the basic frequency of the first AC power system 1 and the second AC power system 2 is assumed to be the same, and the constant value set by the constant setting element 43d is the same as that of the first AC power system 1 and the first AC power system 1. The fundamental frequency of 2 AC power systems 2 is assumed.

  According to such a configuration, a value corresponding to the difference between the frequency detected by the frequency detector 92a and the system fundamental frequency can be used as the output of the speed FF control unit 43. When the basic frequencies of the two AC power systems that perform power flow control are the same, it is possible to reduce one of the frequency detectors 92a and 92b, to make the control circuit compact and to reduce costs. .

  FIG. 5 shows a configuration of the speed FF control unit 43 different from that of FIG. 2, FIG. 3, or FIG. The speed FF control unit 43 in FIG. 5 includes a subtractor 43a, a gain element 43b, and a differentiation element 43e. In the figure, the phase θ1 detected from the three-phase AC line 11 via the phase detector 94a and the phase θ2 detected from the three-phase AC line 21 via the phase detector 94b are subtracted by the subtractor 43a, and the difference therebetween θ1-θ2 is calculated. The calculated difference θ1-θ2 is multiplied by a constant value preset in the gain 43b. The multiplied value is differentiated by the differentiation element 43e and output to the adder 44c of the power FB control unit 44.

  Since the frequency is a relation obtained by differentiating the phase, the frequency action of the speed FF control unit 43 in FIG. 4 can be realized by detecting the phase.

  The differential element 43e shown in FIG. 5 is approximate differential, and the response speed of the power FB control unit 44 can be adjusted with the time constant T1, and the accuracy of differentiation can be adjusted with the time constant T2.

  As described above, according to the configuration of FIG. 5, stable control equivalent to the speed FF control unit 43 of FIG. 4 can be performed by detecting the voltage phase of the system.

FIG. 6 shows the configuration of the speed controller 42.
The speed controller 42 includes a subtractor 42a, a PI controller 42b, and a limiter 42c. The speed controller 42 inputs the output ωref of the power flow controller 41 and the rotational speed ω of the rotor 31 a detected by the angular speed detector 93, and outputs a torque command value Tref to the drive device 32.

  The speed controller 42 receives the rotational speed command value ωref output from the power FB control unit 44 in the power flow controller 41 and the rotational speed ω of the rotor 31 a detected by the angular speed detector 93 as input signals. The The subtractor 42a calculates a difference ωref−ω between the input rotational speed command value ωref and the rotational speed ω. The calculated ωref−ω value is sent to the PI controller 42b composed of a gain element and an integrator element, and an amount corresponding to the ωref−ω value is output. The output of the PI controller 42b is limited within the range of the upper and lower limit values set by the limiter element 42c, and is output from the speed controller 42 to the drive device 32 as the torque command value Tref. The limiter element 42c sets the upper and lower limit values of the allowable torque of the driving device 32.

  According to such a power FB (feedback) control unit 44 and the speed controller 42, the rotational speed command of the rotor 31a is determined according to the deviation of the power flow P1 of the three-phase AC line 11 or 21 with respect to the power flow command value Pref. ωref is adjusted, and the torque controller Tref corresponding to ωref−ω is output to the drive device 32 so that the rotational speed ω of the rotor 31a becomes equal to the rotational speed command ωref by the speed controller 42.

  Since the drive device 32 generates a torque equal to the torque command Tref, the power flow P1 of the three-phase AC line is set within the range between the upper and lower rotational speed limits and the upper and lower torque limits set by the limiter element 42c and the limiter element 44d. Control to make it equal to the tidal current command value Pref becomes possible.

  Note that, for the stability of the power flow control, the control response speed of the speed controller 42 which is a lower control system of the power FB control unit 44 is higher than the control response speed of the power FB control unit 44, and the speed The gain of the controller 42 must be adjusted to be higher than the gain of the power FB control unit 44.

 A second embodiment of the present invention will be described with reference to FIGS. In addition, the same code | symbol is attached | subjected to the structure same as Example 1, and the overlapping description is abbreviate | omitted.

  FIG. 7 shows a switch 4 connected between a power flow controller 41 and a speed controller 42 in the control device 4 of the power grid interconnection device system.

  The switch 45 has three input terminals, which are called an A terminal, a B terminal, and a threshold terminal. The output of the power flow controller 41 is input to the A terminal of the switch 45, the constant value set by the constant setting element 47 is input to the B terminal of the switch 45, and the threshold value terminal of the switch 45 is The output of the relay operation information collector 46 is input. Inside the switch 45, a threshold constant is set. If the value input from the threshold terminal is equal to or greater than the threshold constant, the B terminal input is output. Otherwise, the A terminal input is output. To do.

  The relay operation information collector 46 outputs the flag 1 when detecting the operation of the protection relay in the set AC power system 1 or AC power system 2, and outputs the flag 0 in other cases.

  Accordingly, when the threshold value of the switch 45 is set to 0.5 and the relay operation information collector 46 is connected to the threshold terminal of the switch 45, the protection relay set by the relay operation information collector 46 is activated. Since the relay operation information collector 46 outputs the flag 1, the output of the switch 45 becomes the constant value of the constant setting element 47 connected to the B terminal.

  Further, if the constant 0 is set by the constant setting element 47, the output of the switch 45 becomes 0 during the protective relay operation set by the relay operation information collector 46. Therefore, the speed command value ωref to be given to the speed controller 42 Becomes 0.

  According to the configuration of FIG. 7, the rotation speed command value ωref given to the speed controller 42 can be set to 0 when the protection relay specified by the relay operation information collector 46 is operated. When it is desired to stop the power flow control of the grid interconnection system, the rotation of the rotor 31a can be stopped by setting the rotation speed of the rotor 31a of the rotary phase adjuster 31 to zero. As a result, the torque generated by the drive device 32 becomes 0, and the power flow control by the rotary phase adjuster 31 can be reliably stopped.

  FIG. 8 shows that in the control device 4 of the power grid interconnection device system, a switch 45 is connected to the output of the speed controller 42, and the output of the switch 45 becomes the output of the control device 4 of the power grid interconnection device system. .

  The output of the speed controller 42 is input to the A terminal of the switch 45, the constant value set by the constant setting element 47 is input to the B terminal of the switch 45, and the relay terminal is connected to the threshold value terminal of the switch 45. The output of the operation information collector 46 is input.

  The operation of the switch 45 in FIG. 8 overlaps with the operation of the switch 45 in FIG.

  According to the configuration of FIG. 8, the torque command value Tref given to the drive device 32 can be set to 0 when the protective relay specified by the relay operation information collector 46 is operated. When it is desired to stop the power flow control of the system, the power flow control by the rotary phase adjuster 31 can be stopped by setting the generated torque of the drive device to zero.

  In general, since the speed controller 42 is often controlled by an inverter device, setting the generated torque to zero is equivalent to stopping the inverter device, and is controlled by the inverter device. Can stop the power flow control by the rotary phase adjuster 31 with a simple operation of stopping the inverter.

It is a figure which shows the structure of the control apparatus of the electric power grid interconnection apparatus system which concerns on Example 1 of this invention, and an electric power grid interconnection apparatus system. It is a figure which shows the internal structure of the electric power flow controller which concerns on Example 1 of this invention. It is a figure which shows the structure of the 1st speed FF control part which concerns on Example 1 of this invention. It is a figure which shows the structure of the 2nd speed FF control part which concerns on Example 1 of this invention. It is a figure which shows the structure of the 3rd speed FF control part which concerns on Example 1 of this invention. It is a figure which shows the structure of the speed controller which concerns on Example 1 of this invention. It is a figure which shows the structure of the control apparatus of the 1st electric power grid interconnection apparatus system which concerns on Example 2 of this invention. It is a figure which shows the structure of the control apparatus of the 2nd electric power grid interconnection apparatus system which concerns on Example 2 of this invention.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 1 ... 1st alternating current power system, 2 ... 2nd alternating current power system, 11, 21 ... 3 phase alternating current line, 3 ... Power system interconnection device, 5 ... Control command device, 31 ... Rotary type phase adjuster, 31a Rotating phase adjuster rotor 31b Rotating phase adjuster stator 32 Drive device 33 Power regenerator 4 Power grid controller 41 Power flow controller 42 ... speed controller, 44 ... power FB (feedback) control unit, 43 ... speed FF (feed forward) control unit, 42a, 43a, 44a ... subtractor, 43b ... gain, 44c ... adder, 43c ... delay element , 47 ... constant setting element, 43e ... derivative element, 42b, 44b ... PI (proportional integral) controller, 42c, 44d ... limiter, 91 ... power meter, 92a, 92b ... frequency detector, 93 ... angular velocity detector, 94a, 94b ... phase Can, 45 ... switch, 46 ... relay operation information collection device.

Claims (9)

A rotary phase adjuster coupled to the first AC power system and the second AC power system, and the first AC power by controlling the rotational torque and rotational speed of the rotor of the rotary phase adjuster. In a power grid interconnection device system configured by a control device of a rotary phase adjuster that controls a power flow between a grid and the second AC power grid,
The control device for the rotary phase adjuster includes a power flow target value between the first AC power system and the second AC power system, a rotational speed of a rotor of the rotary phase adjuster, The power flow between one AC power system and the second AC power system, the frequency of the first AC power system, and the frequency of the second AC power system as input signals,
A power grid interconnection system that outputs a rotational speed command value of a rotor of the rotary phase adjuster and a torque command value for rotationally driving the rotor. The control device for the rotary phase adjuster is configured to set a rotational speed command value of a rotor of the rotary phase adjuster to a power flow target value between the first AC power system and the second AC power system, and Calculated using a deviation between the power flow between the first AC power system and the second AC power system, and a deviation between the frequency of the first AC power system and the frequency of the second AC power system. The power grid interconnection device system according to claim 1, wherein: The control device for the rotary phase adjuster is configured to set a rotational speed command value of a rotor of the rotary phase adjuster to a power flow target value between the first AC power system and the second AC power system, and The deviation between the power flow between the first AC power system and the second AC power system, and the deviation between the frequency of the first AC power system and the frequency of the second AC power system via a delay function. The power grid interconnection device system according to claim 1, wherein the power grid interconnection device system is calculated using a value output by The control device for the rotary phase adjuster is configured to set a rotational speed command value of a rotor of the rotary phase adjuster to a power flow target value between the first AC power system and the second AC power system, and Deviation between the power flow between the first AC power system and the second AC power system, and the deviation between the frequency of the first AC power system or the frequency of the second AC power system and a fixed value. The power grid interconnection device system according to claim 1, wherein the power grid interconnection device system is calculated using the power grid interconnection system. A rotary phase adjuster coupled to the first AC power system and the second AC power system, and the first AC power by controlling the rotational torque and rotational speed of the rotor of the rotary phase adjuster. In a power grid interconnection device system configured by a control device of a rotary phase adjuster that controls a power flow between a grid and the second AC power grid,
The control device for the rotary phase adjuster includes a power flow target value between the first AC power system and the second AC power system, a rotational speed of a rotor of the rotary phase adjuster, The power flow between one AC power system and the second AC power system, the voltage phase of the first AC power system, and the voltage phase of the second AC power system as input signals,
A power grid interconnection device system that outputs a rotational speed command value of a rotor of the rotary phase adjuster and a torque command value for rotationally driving the rotor. The control device for the rotary phase adjuster is configured to set a rotational speed command value of a rotor of the rotary phase adjuster to a power flow target value between the first AC power system and the second AC power system, and The deviation between the power flow between the first AC power system and the second AC power system and the deviation between the voltage phase of the first AC power system and the voltage phase of the second AC power system are used. The power grid interconnection device system according to claim 5, wherein the power grid interconnection device system is calculated. The control device for the rotary phase adjuster is configured to set a rotational speed command value of a rotor of the rotary phase adjuster to a power flow target value between the first AC power system and the second AC power system, and The differential function is the deviation between the power flow between the first AC power system and the second AC power system, and the voltage phase of the first AC power system and the voltage phase of the second AC power system. The power grid interconnection device system according to claim 5, wherein the power grid interconnection device system is calculated using a value output via a power supply. The control device for the rotary phase adjuster includes relay operation observation means for detecting an operation of a relay designated in advance in the first AC power system or the second AC power system, and the relay operation observation means The rotation speed command value of the rotor of the rotary phase adjuster is set to zero when the operation of the relay designated in advance is detected. Power system interconnection device system. The control device for the rotary phase adjuster includes relay operation observation means for detecting an operation of a relay designated in advance in the first AC power system or the second AC power system, and the relay operation observation means 8. The torque command value for rotationally driving the rotor of the rotary type phase adjuster is set to zero when the operation of the relay designated in advance is detected. 8. A power grid interconnection device system according to claim 1.

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