JPH04334929A - Analog simulator for power system - Google Patents

Abstract

PURPOSE:To prepare an experiment in a short time by directly conducting a control for bringing a frequency and a phase of a voltage of an experiment preparation into coincidence for the voltage. CONSTITUTION:A signal converter 21 is set to a converting state for outputting a signal 28a as a signal 21a, and to a state in which a tide state set signal 27 cannot be input to a signal generator 29. A set signal VC represented by a signal 10a is set equally to a rated voltage of a power system 2 by inputting a voltage set signal 11 to a voltage setter 10 or a voltage setting operation 10b. A set frequency FC representing a signal 16a is set equally to a rated frequency of the system 2 by inputting a frequency set signal 17 to a frequency setter 16 or a frequency setting operation 16b. Thus, an experiment preparation can be completed in a short time.

Description

[Detailed description of the invention]

0001

[Industrial Application Field] The present invention relates to an analog simulation device for a power system used for analytical experiments of various phenomena in a power system including a plurality of power generation facilities, and in particular, to connect the output terminal of a simulated generator after starting the device. The first test required for the above experiment to close the circuit breaker connected to the simulated power system.
It is possible to reduce both the preparation time and the second preparation time for the experiment required to set the initial power flow state of power in the simulated power system to the desired state after turning on the circuit breaker. Regarding equipment.

0002

[Prior Art] Figure 3 shows a plurality of power generation equipment simulators 1.
This is a configuration diagram of a conventional power system simulation device 3 consisting of a simulated power system 2 to which these simulators 1 are connected by a circuit switching unit 8, which will be described later. It is composed of That is, in FIG. 4, a mechanical torque signal 18a representing the mechanical torque Tm1 and an electric torque signal 6a representing the electric torque Te are input, and the angular velocity of the generator rotor is calculated by performing the time integral calculation shown in equation (1). This is a generator rotor simulator that outputs an angular velocity signal 4a representing ωr with an integral time equal to the inertia constant M of the rotor shown in equation (1), where t in equation (1) is time. ∫(1/M)・(Tm1−Te)dt=ωr……
………………………(1)

[0003] 5 is provided with a three-phase output terminal 5a, into which an angular velocity signal 4a and a field voltage signal 12a are input, and a voltage value V1 and a signal corresponding to the field voltage Ef represented by this signal 12a. A three-phase AC voltage 5b consisting of three-phase voltages of Er, Es, and Et having a frequency F1 obtained by dividing the angular velocity ωr represented by 4a by 2π is output to the terminal 5a, and a load is connected to the terminal 5a. and a voltage/current generator configured to cause a three-phase alternating current 5c to flow through the terminal 5a, and 6 detects the three-phase alternating current 5c and performs an operation to calculate the electric torque Te described above using this current 5c. An electric torque calculator 7 outputting the signal 6a is a power generation function simulator consisting of a generator 5 and a calculator 6. In this case, the simulators 4 and 7 simulate one generator. is clear. 8
9 is a circuit breaker as an electrical circuit switching unit that opens and closes the electrical connection of the terminal 5a to the simulated power system 2 according to the input switching command signal 9c, and 9 is T as an arbitrary phase in the circuit breaker 8.
The voltage Vx1 on the phase terminal 5a side and the voltage Vx2 on the power system 2 side are input, and the voltage adjustment signal 9a corresponds to the difference between Vx1 and Vx2, and the difference between the frequency F1 of Vx1 and the frequency F2 of Vx2. It outputs a frequency adjustment signal 9b according to 10 is a set voltage signal representing a set voltage Vc corresponding to said operation 10b and said Va when a voltage setting operation 10b is applied or a voltage setting signal 11 representing a target voltage Va is input; A generator output voltage setting device outputs a signal 10a and adjusts the value of the signal 10a according to the value of the signal 9a when the voltage adjustment signal 9a is input. By inputting the input field voltage signal 12a to the voltage/current generator 5, the calculated average value of the voltage of each phase of the voltage 5b becomes the signal 10a.
This is an automatic voltage regulator that adjusts the voltage to be equal to the set voltage Vc represented by Vc. 13 is a voltage control unit consisting of a voltage setting device 10 and an adjustment device 12, and the synchronization device 9 is inputted with a startup signal 9d, and the voltage adjustment device 12 is inputted with a startup signal 12b. Each of them is configured to perform the operations described above.

Reference numeral 14 indicates that when a power setting operation 14b is applied or a power setting signal 15 representing a target power Pa is input, a set power Pc corresponding to the operation 14b and the above Pa is input.
A generator output power setting device 16 outputs a setting power signal 14a representing the target frequency Fa, and when a frequency setting operation 16b is applied or a frequency setting signal 17 representing the target frequency Fa is input, the generator output power setting device 16 responds to the operation 16b and the Fa. Setting frequency F
18 is a generator output frequency setter that outputs a set frequency signal 16a representing the frequency change signal 16a and, when a frequency adjustment signal 9b is input, adjusts the value of the signal 16a according to the value of the signal 9b; 4a is input and the power Pc represented by the signal 14a and the frequency Fc represented by the signal 16a.
This is a simulated governor that performs a predetermined third calculation using the angular velocity ωr represented by the signal 4a and outputs the aforementioned mechanical torque signal 18a as a signal corresponding to the result of this calculation, and this governor 18 is also activated. It is configured to perform the above-described operation when the signal 18b is input. In this case, the power generation equipment simulator 1 described above is composed of the parts shown in FIG. 4 except for the power system 2.
Further, the third calculation described above is performed by inputting the torque signals 18a and 6a to the simulator 4 when the circuit breaker 8 is in the closed state, and thereby outputting the three-phase power P from the power generation function simulator 7 to the three-phase output terminal 5a. is equal to the set power Pc represented by the signal 14a, and the angular velocity ωr represented by the angular velocity signal 4a is made equal to the angular frequency ωc obtained by multiplying the set frequency Fc represented by the signal 16a by 2π.

[0005] The power system simulation device 3 is configured as described above, and conventionally, when this device 3 is used to perform analytical experiments on various phenomena in the power system, preparations for the experiment are performed according to the procedure described below. ing. That is, when trying to conduct an experiment using the simulation device 3,
In all of the specific simulators 1 as power generation equipment simulators 1 that need to be connected to the power system 2, first, the voltage setting device 10, the frequency setting device 16, the power setting device 14
By applying a voltage setting operation, a frequency setting operation, and a power setting operation to each of , or by inputting setting signals 11, 17, and 15, the set voltage Vc represented by the signal 10a is set to approximately 80% of the rated voltage of the power system 2. is set to the voltage, and the signal 16a
Set the set frequency Fc represented by the rated frequency of system 2,
The set power Pc represented by the signal 14a is set to zero. Then, for each specific simulator 1, the governor 18,
When the activation signals 18b and 12b are sequentially input to the voltage regulator 12, the voltage V1 and frequency F1 of the AC voltage 5b change toward the voltage setting value Vc and the frequency setting value Fc, respectively. Therefore, at an appropriate time, the synchronization device 9
When the start signal 9d is input to the device 9, the device 9 starts the above-mentioned operation, and when the voltage difference, frequency difference, and phase difference between the two voltages Vx1 and Vx2 are within the allowable values, the device 9 outputs the signal 9c. The signal is output, the circuit breaker 8 is closed, and the connection of the specific simulator 1 to the power system 2 is completed. Then, after the connection of the specific simulator 1 in the simulation device 3 to the system 2 is completed as described above, the power setting device 14 of the simulator 1 connected to the system 2 is completed.
and the signals 14a, 1 by applying the above-mentioned setting operation to the voltage setting device 10 or inputting the above-mentioned setting signal.
By changing the set power Pc and set voltage Vc represented by 0a,
The initial state of the power flow state defined by the voltage, power, and its direction at at least one predetermined point in the power system 2 is set, and the experiment preparation is completed.

[0006]

[Problem to be Solved by the Invention] In the simulation device 3, experiment preparation is performed as described above.
In this case, each of the governor 18, the simulated generator 19 consisting of the simulators 4 and 7, the voltage regulator 12, and the synchronization device 9 is configured to operate at the same response speed as that in the actual power generation equipment, In particular, the time constant of the governor 18, the inertia constant M as the integration time of the simulator 4,
The time constant of the device 9 is large, and both voltages Vx1,
Since the control to match each frequency and each phase of Vx2 is performed through each operation of the governor 18 and the simulator 4, and the time delay of this control is large, a start signal 18b is input to the governor. The first stage of experiment preparation, from when the circuit breaker 8 closes, usually takes about 5 minutes.
However, there is a problem in that the first step takes time. Then, in the case of the simulation device 3, after the parallel connection of each generator 19 to the system 2 is completed, the output power P and output voltage V1 of one generator 19 are set in order to set the initial power flow state. When varied by changing the settings of power Pc and voltage Vc, each generator 1 due to interaction between the generators
Because power is exchanged between 9 and 9, transient oscillations occur in P and V1, it takes a long time for the power flow to stabilize, and the setting of Pc and Vc must be changed to prevent the generator 19 from stepping out. Therefore, the simulation device 3 has the problem that it takes time to set the initial power flow state, which is the second stage of experiment preparation.

[0007] The purpose of the present invention is to
Control to match the frequency and phase of both voltages Vx1 and Vx2 performed in stages is performed directly on voltage Vx1 without going through the governor 18 and simulator 4,
Another object is to set the initial power flow state in the second stage of the experiment preparation described above without transmitting or receiving power between the generators 19, so that the experiment preparation can be carried out in a short time.

[0008]

[Means for Solving the Problems] In order to achieve the above object, according to the present invention,

1) A mechanical torque signal representing the mechanical torque Tm and an electric torque signal representing the electric torque Te are input, and the angular velocity ωr of the generator rotor is determined by integrating the difference between the Tm and the Te over time. a generator rotor simulator that outputs an angular velocity signal representing the angular velocity, a three-phase output terminal, an angular frequency setting signal and a field voltage signal, and a voltage value corresponding to the field voltage represented by the field voltage signal; V1 and a frequency F1 corresponding to the angular frequency represented by the angular frequency setting signal.
a power generation function simulator that outputs a three-phase AC voltage having a three-phase AC voltage to the three-phase output terminal and outputs the electric torque signal representing the Te based on the three-phase AC current flowing to the three-phase output terminal; an electric circuit switching section that opens and closes the electrical connection of the three-phase output terminal to the simulated power system according to a command signal; and a voltage Vx1 on the side of the three-phase output terminal of any one phase in the electric circuit switching section and the The voltage Vx2 on the power system side is input, and the voltage Vx1 and the Vx2 are input.
x2 and a frequency adjustment signal corresponding to the difference between the frequency F1 of the Vx1 and the frequency F2 of the Vx2;
an automatic synchronization device that outputs the opening/closing command signal when the voltage difference, frequency difference, and phase difference between the Each phase of the three-phase AC voltage is input by inputting the voltage setting signal representing the voltage, the voltage adjustment signal, and the three-phase AC voltage, applying a voltage setting operation, and inputting the field voltage signal to the power generation function simulator. a voltage control unit that makes an arithmetic mean value of the voltages equal to a set voltage Vc according to the Va, the value of the voltage adjustment signal, and the voltage setting operation, and a power setting signal representing the target power Pa and a target frequency. A frequency setting signal representing Fa, the frequency adjustment signal, and the angular velocity signal are input, and a power setting operation and a frequency setting operation are applied, and the F
a, a value of the frequency adjustment signal, and the frequency setting operation, outputting a setting frequency signal representing a setting frequency Fc, and a setting power Pc corresponding to the Pa, the power setting operation, the Fc, and the angular velocity signal. an original machine torque signal generation unit that performs a predetermined first calculation using the ωr expressed by the voltage Vx1 and outputs an original machine torque signal according to the result of the first calculation; V
Voltage Vxz at reference point Z as the desired point of the same phase as x1
When the phase difference setting signal representing the target phase difference δz, which is the target value of the phase difference between the voltages Vx1 and Vxz, and the setting frequency signal are input, and the power flow state setting signal is not input, the setting frequency is In a state where an angular frequency signal representing an angular frequency corresponding to the Fc represented by the signal is output and the power flow state setting signal is input, the Vx1, the Vxz, the δz, and the Fc are used to set a predetermined condition. an angular frequency signal generating section that performs a second calculation and outputs the angular frequency signal representing the angular frequency of the calculation result; and switches between the angular velocity signal and the angular frequency signal and outputs the angular frequency setting signal as the angular frequency setting signal. a signal switching unit, into which the angular velocity signal, the angular frequency signal, and the original machine torque signal are input, and performs a predetermined control calculation on the difference between the ωr represented by the angular velocity signal and the angular frequency ωb represented by the angular frequency signal; a signal switching state in which the signal switching unit outputs the angular frequency signal as the angular frequency setting signal by outputting the mechanical torque signal having a value that is the sum of the value obtained by the operation and the value of the original machine torque signal; , a plurality of power generation equipment simulators each including a mechanical torque signal generating unit that causes the ωr to follow the ωb, the simulated power system, and the power generation equipment simulator that needs to be connected to the simulated power system. The power setting signal and the voltage setting signal that are input to all of the specific power generation facility simulators are input, and the data of the position of the reference point Z in the simulated power system is input. and a phase difference calculation unit that outputs the phase difference setting signal for each of the specific power generation equipment simulators, and the signal switching unit outputs the angular frequency signal as the angular frequency setting signal in all the specific power generation equipment simulators based on the predetermined conditions. The second calculation is performed in each of the specific power generation equipment simulators so that the frequency F1 of the three-phase AC voltage is the set frequency Fc. and the phase difference between the voltages Vx1 and Vxz input to the angular frequency signal generation section is the same as δz represented by the phase difference setting signal input to the angular frequency signal generation section. The first calculation is performed when the signal switching section is in a signal switching state in which the angular velocity signal is output as the angular frequency setting signal and the electric circuit opening/closing section is in a closed state;
By inputting the mechanical torque signal and the electric torque signal to the generator rotor simulator, the three-phase power output from the generator function simulator to the three-phase output terminal becomes equal to the set power Pc, and An analog simulation device for a power system is configured as a calculation for making the ωr represented by the angular velocity signal equal to an angular frequency ωc corresponding to the set frequency Fc, and

2) In the simulation apparatus described in item 1) above, the angular frequency signal generation section detects a phase difference δ between the voltages Vx1 and Vxz and outputs a phase difference signal representing the δ. and a first subtractor that receives the phase difference signal and the phase difference setting signal and outputs a deviation signal representing the difference (δz−δ) between the target phase difference δz represented by the phase difference setting signal and the δ. If the power flow state setting signal is not input, the angular frequency value becomes zero, and if the deviation signal is input and the power flow state setting signal is input, proportional control calculation or proportional integral control is performed for the deviation signal. a first signal generation unit that performs calculations and outputs a first signal representing an angular frequency ωa at which the angular frequency value is equal to the calculation results; Setting frequency Fc represented by the setting frequency signal
A power system analog simulation device is configured to include a first adder that outputs an angular frequency signal representing the sum of the angular frequency ωb and the angular frequency ωc corresponding to the angular frequency ωc, and

3) In the simulation apparatus described in item 1) above, the mechanical torque signal generating section receives an angular velocity signal and an angular frequency signal, and generates an angular frequency ωb represented by the angular frequency signal and an angular velocity represented by the angular velocity signal. a second subtracter that outputs a second signal representing a difference from ωr; a third signal generation unit that performs a proportional-integral control calculation on the second signal and outputs a third signal representing the calculation result; a second adder into which the third signal and the original machine torque signal are input, and outputs a machine torque signal having a value that is the sum of the value of the third signal and the value of the original machine torque signal. An analog simulation device was constructed.

0012

[Operation] With the above configuration, in any electric power system analog simulation device, in all specific power generation equipment simulators, the signal switching section is set to a state in which the angular frequency signal is output as the angular frequency setting signal, and Set the angular frequency signal generation section to a state where no power flow state setting signal is input, and set the target frequency Fa represented by the frequency setting signal input to the original machine torque signal generation section and the frequency setting operation applied to the signal generation section. The corresponding set frequency Fc, the target voltage Va represented by the voltage setting signal input to the voltage control section, and the set voltage Vc according to the voltage setting operation applied to the voltage control section are set in the simulated power system of the circuit switching section, respectively. When the rated frequency Fn and rated voltage Vn are set equal to the side rated frequency Fn and the rated voltage Vn are started, respectively, and the original machine torque signal generator, voltage control unit, and automatic synchronization device are started, both voltages V
Control to match the frequencies and phases of x1 and Vx2 is
The power generating equipment simulator 1 of the present invention corresponds to the part comprising the governor 18 and the simulator 4 in the power generating equipment simulator 1 described above, and the generator rotor simulator is connected to the original machine torque signal generating unit, the mechanical torque signal generating unit, and the generator rotor simulator. The power generation equipment simulator is directly connected to the simulated power system by the electric circuit switching section without being directly applied to Vx1. Then, after the connection of the specific power generation equipment simulator to the power system is completed in this way, a power setting signal representing the target power Pa specific to each of the power generation equipment simulators that have been connected to the power system is transmitted. and a specific target voltage V that is the same as or different from said voltage Vn.
At the same time, the same two setting signals and the position data of the reference point Z in the simulated power system are inputted to the phase difference calculation unit, and then for each power generation equipment simulator that has been connected to the grid. When a power flow state setting signal is input to the angular frequency signal generation section, the phase difference δ between both voltages Vxz and Vx1 is input from the phase difference calculation section to the angular frequency signal generation section due to the phase difference control action of this angular frequency signal generation section. The value of the angular frequency signal is controlled so that it is equal to the target phase difference δz, and as a result, the initial power flow state can be adjusted without transferring power between the generators in the power generation equipment simulator that has been connected to multiple grids. Since the following settings are made, an analog simulation device for power systems can be obtained in which experiment preparation can be completed in a short period of time.

[0013]

[Embodiment] Fig. 2 is an overall configuration diagram of an embodiment of the present invention, Fig. 1
2 is a detailed configuration diagram of the main parts in FIG. 2. In FIGS. 1 and 2, the same parts and matters as in FIGS. 3 and 4 are given the same reference numerals as in FIGS. 3 and 4. In FIGS. 1 and 2, 20 is input with a mechanical torque signal 32a representing mechanical torque Tm and an electric torque signal 6a, and (1
21 is a generator rotor simulator that performs a time integral calculation using Tm instead of Tm1 in the equation ( ) and outputs an angular velocity signal 20a representing the angular velocity ωr. This is a signal switching section that switches and outputs the angular frequency setting signal 21a. In this case, the voltage/current generator 5 receives the signal 21a instead of the signal 4a shown in FIG. 4, and the frequency F1 of the three-phase AC voltage 5b. is the frequency obtained by dividing the angular frequency ω1 represented by the signal 21a by 2π. 22 is the angular velocity signal 2
0a, the set power signal 14a, and the set frequency signal 16a are input, and a predetermined first calculation is performed using the angular velocity ωr, power Pc, and frequency Fc represented by these input signals, and the original machine is operated according to the result of this calculation. A simulated governor 23 is designed to output a torque signal 22a. Reference numeral 23 is an original machine torque signal generation unit consisting of this governor 22, a generator output power setting device 14, and a generator output frequency setting device 16. The governor 22 is also shown in FIG. It is configured to perform the above-described operation when the activation signal 18b shown is input. Then, here, when the signal switching unit 21 is in a signal switching state in which the angular velocity signal 20a is output as the angular frequency setting signal 21a and the circuit breaker 8 is in the closed state, the first calculation described above is performed when the The torque signal 32a and the electric torque signal 6a are transmitted to the rotor simulator 2.
0, the three-phase power P output from the power generation function simulator 7 to the terminal 5a becomes equal to the set power Pc represented by the signal 14a, and ωr represented by the signal 20a.
This calculation is performed so that ωc becomes equal to the angular frequency ωc obtained by multiplying the set frequency Fc represented by the signal 16a by 2π.

24 is the voltage Vx1 and V in the power system 2
Voltage Vxz at reference point Z as the desired point of the same phase as x1
A phase difference signal 24a representing this δ by detecting a phase difference δ with
A phase difference detector 25 receives the signal 24a and a phase difference setting signal 35a (described later), and detects the difference (δ) between the phase difference δ represented by the signal 24a and the target phase difference δz represented by the signal 35a.
a first subtractor that outputs a deviation signal 25a representing z−δ);
26, if the power flow state setting signal 27 is not input, the angular frequency value becomes zero, and if the deviation signal 25a is input and the setting signal 27 is input, proportional control calculation or proportional integral control calculation is performed for the deviation signal 25a. The angular frequency ωa at which the above-mentioned angular frequency value is equal to the result of these calculations is determined by
A first signal generating section outputs a first signal 26a representing 2
8 represents the angular frequency ωb, which is the sum of the angular frequency ωa represented by the signal 26a and the angular frequency ωc obtained by multiplying the set frequency Fc represented by the signal 16a by 2π, when the signal 26a and the setting frequency signal 16a are input. This is a first adder configured to output an angular frequency signal 28a. Then, 29 is a detector 24, a subtracter 25, a signal generator 26, and an adder 28.
30 is an angular velocity signal 20
a and the angular frequency signal 28a, and outputs a second signal 30a representing the difference between the angular frequency ωb represented by the signal 28a and the angular velocity ωr represented by the signal 20a; 31 is proportional to the second signal 30a; A third signal generating section 32 performs an integral control calculation and outputs a third signal 31a representing the calculation result, and 32 is input with the third signal 31a and the original machine torque signal 22a, and the value of the signal 31a and the signal 22a are input. This is a second adder that outputs the aforementioned mechanical torque signal 32a having a value that is the sum of the above-mentioned mechanical torque signal 32a. 33 consists of a subtracter 30, a signal generation section 31, and an adder 32. By inputting the mechanical torque signal 32a outputted by the adder 32 to the rotor simulator 20, the signal switching section 21 changes the signal 28a as the signal 21a. In the output signal switching state, the angular velocity ωr is the signal 2.
This is a mechanical torque signal generating section that tracks the angular frequency ωb represented by 8a.

Reference numeral 34 includes a rotor simulator 20, a signal switching section 21, a power generation function simulator 7, a circuit breaker 8, an automatic synchronization closing device 9, a voltage control section 13, an original machine torque signal generation section 23, and an angular frequency signal generation section 29. A power generation equipment simulator corresponding to the power generation equipment simulator 1 shown in FIG. 4, which is equipped with a mechanical torque signal generation unit 33, and a power generation equipment simulator 36 that includes a simulated power system 2, a plurality of simulators 34 each provided with a circuit breaker 8, and one phase difference calculation. The power system simulator 35 is equipped with a power generation equipment simulator 3 that needs to be connected to the power system 2.
By inputting the power setting signal 15 and the voltage setting signal 11 that are input to all of the specific power generation equipment simulator 37 as 4, and inputting the data Dz of the position of the reference point Z in the system 2, the simulator 37 The above-mentioned phase difference setting signal 35a is output to each of the two. Then, in this case, signal 35
The above-mentioned target phase difference δz represented by a is such that all the simulators 37 are connected to the system 2 by the circuit breaker 8, and the power P and voltage V1 output from the terminal 5a in each simulator 37 are set to target values Pa and Va, respectively. The data Dz and all P
This is the phase difference calculated by the calculation unit 35 using a and Va.

Then, in the power generation equipment simulator 34, the angular frequency signal generating section 29, through the operations of the above-mentioned sections, sets a signal switching state in which the signal switching section 21 in all the simulators 37 outputs the signal 28a as the signal 21a. , the circuit breaker 8 is in the closed state, and the power flow state setting signal 27 is input to the signal generator 29, and the signal 16a represents the frequency F1 of the AC voltage 5b in each of the simulators 37. The phase difference δ between both voltages Vx1 and Vxz, which is equal to the set frequency Fc and input to the signal generating unit 29, is equal to the target phase difference δz represented by the phase difference setting signal 35a input to the same signal generating unit 29. is configured to do so.

Since the electric power system simulation device 36 is configured as described above, the preparation for the experiment is completed by performing the following operations on the specific power generation equipment simulator 37. That is, first, the signal switching section 21 selects the signal 28.
a is set to a switching state in which it is output as a signal 21a, and the power flow state setting signal 27 is not input to the signal generator 29, and the signal 10a is set by inputting the voltage setting signal 11 to the voltage setting device 10 or by the voltage setting operation 10b. The set voltage Vc represented by the signal 16a is set equal to the rated voltage Vn of the power system 2, and the set frequency Fc represented by the signal 16a is set to the rated frequency Fn of the power system 2 by inputting the frequency setting signal 17 to the frequency setter 16 or by the frequency setting operation 16b.
set equal to . Then, the activation signal 18b, 1
The governor 22 and voltage regulator 1 are controlled by the inputs 2b and 9d.
2. When the synchronization closing device 9 is activated in sequence, the voltage V1 changes toward Vn, the frequency F1 changes toward Fn, and the circuit breaker 8 is eventually closed by the closing device 9, so perform the above operations. By performing this for all simulators 37, the first preparation stage corresponding to the first stage of experiment preparation in the simulation apparatus 3 described above is completed. Therefore, next, the position data Dz is input to the phase difference calculation unit 35.
is input, and the voltage Va and power Pa represented by the setting signals 11 and 15 input to the calculation unit 35 and each simulator 37 are set equal to desired values, respectively, and the power flow state setting signal 27 is generated for each simulator 37 by the signal generation unit. 29, voltage V1 and frequency F1 are input in each simulator 37.
changes, and eventually the phase difference δ between the two voltages Vx1 and Vxz becomes equal to the phase difference δz represented by the signal 35a, and the power system 2
reaches the desired initial power flow state, and at this time, ωr represented by the signal 20a is tracking ωb represented by the signal 28a. Therefore, when the signal switching section 21 next switches the signal 20a to the signal 21a and cuts off the input of the setting signal 27 to the signal generating section 29, the simulation device 3 starts a second preparation corresponding to the second stage of experimental preparation. The stage ends.

In the simulation device 36, preparation for the experiment is performed as described above, but in this case, the control performed in the first preparation stage to match the frequency and phase of both voltages Vx1 and Vx2 is performed by the mechanical torque signal generating section. 33, the governor 22, and the rotor simulator 20, and the response corresponding to the response delay of the rotor simulator 4 and the governor 8 in the conventional power generation equipment simulator 1 is applied to the above control. Since no delay is introduced, the first preparatory stage of the experiment is completed in a shorter time than in the conventional simulation device 3. In addition, in the simulation device 36, the initial power flow state can be set without using the angular velocity ωr, in other words, through the exchange of power between the generators in the power generation equipment simulator 37 connected to the power system 2. Since the initial power flow state becomes stable in a short time, and since ωr follows ωb at this time, the second preparation stage of the experiment is also completed in a shorter time than in the conventional device 3. Therefore, it is clear that the simulation apparatus 36 requires a shorter experiment preparation time than the conventional apparatus 3.

[0019]

[Effects of the Invention] As mentioned above, in the present invention,

[
1) A mechanical torque signal representing the mechanical torque Tm and an electric torque signal representing the electric torque Te are input, and the difference between Tm and Te is integrated over time to generate an angular velocity signal representing the angular velocity ωr of the generator rotor. A generator rotor simulator that outputs a voltage value V1 and an angular frequency corresponding to the field voltage represented by the field voltage signal, which is provided with a three-phase output terminal and inputted with an angular frequency setting signal and a field voltage signal. Outputs a three-phase AC voltage having a frequency F1 corresponding to the angular frequency represented by the setting signal to the three-phase output terminal, and outputs an electric torque signal representing the Te based on the three-phase AC current flowing to the three-phase output terminal. A power generation function simulator, an electrical circuit switching section that opens and closes the electrical connection of the three-phase output terminal to the simulated power system according to the input switching command signal, and a circuit switching section that opens and closes the electrical connection of the three-phase output terminal to the simulated power system according to the input switching command signal, and a circuit switching section that connects the three-phase output terminal of any one phase in this electrical circuit switching section. side voltage Vx1 and simulated power system side voltage Vx2 are input and Vx1
outputting a voltage adjustment signal according to the difference between Vx1 and Vx2 and a frequency adjustment signal according to the difference between the frequency F1 of Vx1 and the frequency F2 of Vx2, and the voltage difference between Vx1 and Vx2;
an automatic synchronization device that outputs the opening/closing command signal when the frequency difference and the phase difference each become below the allowable value and thereafter eliminates both the voltage adjustment signal and the frequency adjustment signal; and a voltage setting signal and voltage adjustment signal representing the target voltage Va. and the three-phase AC voltage are input, a voltage setting operation is applied, and a field voltage signal is input to the power generation function simulator, so that the arithmetic mean value of the voltage of each phase of the three-phase AC voltage is calculated from the voltage adjustment value Va. Set voltage V according to signal value and voltage setting operation
a voltage control unit that makes the target power Pa equal to c;
A power setting signal representing the target frequency Fa, a frequency setting signal representing the target frequency Fa, a frequency adjustment signal, and an angular velocity signal are input, and a power setting operation and a frequency setting operation are applied, and the frequency setting signal representing the target frequency Fa is input.
outputs a set frequency signal representing a set frequency Fc according to the value of the frequency adjustment signal and the frequency setting operation, and sets a set power Pc and the Fc according to the Pa and the power setting operation.
and an original machine torque signal generation unit that performs a predetermined first calculation using the ωr represented by the angular velocity signal and outputs an original machine torque signal according to the result of the first calculation, and A voltage Vxz at a reference point Z as a desired point of the same phase as Vx1 and a phase difference setting signal and a setting frequency signal representing a target phase difference δz which is a target value of the phase difference between both voltages Vx1 and Vxz are input, and When the power flow state setting signal is not input, an angular frequency signal representing the angular frequency corresponding to the Fc represented by the set frequency signal is output, and when the power flow state setting signal is input, Vx1, Vxz, δz, and Fc are output. an angular frequency signal generating section that performs a second calculation under predetermined conditions using the angular frequency signal and outputs the angular frequency signal representing the angular frequency of the calculation result; A signal switching section that outputs a setting signal, an angular velocity signal, an angular frequency signal, and an original machine torque signal are input, and performs a predetermined control calculation on the difference between ωr represented by the angular velocity signal and angular frequency ωb represented by the angular frequency signal. ωr tracks ωb in the signal switching state in which the signal switching unit outputs the angular frequency signal as the angular frequency setting signal by outputting a mechanical torque signal having the sum of the value obtained by A plurality of power generation equipment simulators each having a mechanical torque signal generation unit configured to generate a mechanical torque signal, the above-mentioned simulated power system, and a specific power generation equipment simulator as a power generation equipment simulator that needs to be connected to this simulated power system are all inputted. A phase difference setting signal is output to each of the specific power generation equipment simulators by inputting the power setting signal and the voltage setting signal, and inputting data on the position of the reference point Z in the simulated power system. A phase difference calculation unit is provided, and the predetermined conditions are set such that in all specific power generation equipment simulators, the signal switching unit is in a signal switching state in which the angular frequency signal is output as the angular frequency setting signal, and the electric circuit opening/closing unit is in the closed state. The second calculation is performed in each of the specific power generation equipment simulators so that the frequency F1 of the three-phase AC voltage becomes equal to the set frequency Fc, and the voltages Vx1 and Vxz input to the angular frequency signal generator are The first calculation is performed so that the phase difference between both voltages becomes equal to δz expressed by the phase difference setting signal input to the same angular frequency signal generating section, and the signal switching section converts the angular velocity signal into the angular frequency setting signal. When the signal output as a signal is in the switching state and the electric circuit opening/closing part is in the closed state, the mechanical torque signal and the electric torque signal are input to the generator rotor simulator, so that the three-phase output terminal is output from the generator function simulator. The three-phase power output to is equal to the set power Pc, and ωr represented by the angular velocity signal is the set frequency Fc.
An analog simulation device for a power system is configured as a calculation for making the angular frequency ωc equal to the corresponding angular frequency ωc, and

2) In the simulation apparatus described in item 1) above, the angular frequency signal generation section detects a phase difference δ between the voltages Vx1 and Vxz and outputs a phase difference signal representing this δ. a first subtractor that receives the phase difference signal and the phase difference setting signal and outputs a deviation signal representing the difference (δz−δ) between the target phase difference δz and δ represented by the phase difference setting signal; If the power flow state setting signal is not input, the angular frequency value becomes zero; if the deviation signal is input and the power flow state setting signal is input, the angle is calculated by performing proportional control calculation or proportional integral control calculation on the deviation signal. a first signal generation unit that outputs a first signal representing an angular frequency ωa whose frequency value is equal to the results of these calculations; and a set frequency to which the first signal and a set frequency signal are input and which are represented by the ωa and the set frequency signal. A power system analog simulation device is configured to include a first adder that outputs an angular frequency signal representing the sum of the angular frequency ωb and the angular frequency ωc corresponding to Fc, and

3) In the simulation apparatus described in item 1) above, the mechanical torque signal generation section receives the angular velocity signal and the angular frequency signal, and generates an angular frequency ωb represented by the angular frequency signal and an angular velocity ωr represented by the angular velocity signal. a second subtracter that outputs a second signal representing the difference between and a second adder that receives a mechanical torque signal and outputs a mechanical torque signal having a value that is the sum of the value of the third signal and the value of the original mechanical torque signal. did.

[0023] Therefore, with the above configuration, in any electric power system analog simulation device, in all specific power generation equipment simulators, the signal switching section is set to a state in which the angular frequency signal is output as the angular frequency setting signal. , and set the angular frequency signal generation section to a state where no power flow state setting signal is input, and set the target frequency Fa represented by the frequency setting signal input to the original machine torque signal generation section and the frequency setting operation applied to the signal generation section. The set frequency Fc corresponding to the set frequency Fc and the set voltage Vc corresponding to the target voltage Va represented by the voltage setting signal input to the voltage control unit and the voltage setting operation applied to the voltage control unit are respectively set as the simulated power of the circuit switching unit. Set equal to the rated frequency Fn and rated voltage Vn on the grid side, the original machine torque signal generator,
When the voltage control unit and the automatic synchronization device are started, the control to match the frequency and phase of both voltages Vx1 and Vx2 is carried out by the control of the present invention corresponding to the portion consisting of the governor 18 and the simulator 4 in the power generation equipment simulator 1 described above. This is performed directly on Vx1 without going through the parts consisting of the original machine torque signal generation section, the machine torque signal generation section, and the generator rotor simulator in the power generation facility simulator, and the power generation facility simulator is converted into a simulated power system by the electric circuit switching section. They will be entered in parallel. Then, after the connection of the specific power generation equipment simulator to the power system is completed in this way, a power setting signal representing the target power Pa specific to each of the power generation equipment simulators that have been connected to the power system is transmitted. and a voltage setting signal representing a specific target voltage Va that is the same as or different from the voltage Vn, and also inputs both the same setting signals and the position data of the reference point Z in the simulated power system to the phase difference calculation section. After that, when a power flow state setting signal is input to the angular frequency signal generation section for each power generation equipment simulator that has been connected to the grid, both voltages Vxz and Vx1 are adjusted by the phase difference control action of this angular frequency signal generation section.
The value of the angular frequency signal is controlled so that the phase difference δ between them is equal to the target phase difference δz input from the phase difference calculation unit to the angular frequency signal generation unit, and as a result, multiple power generation units connected to the grid Since the initial power flow state is set without transmitting and receiving power between the generators in the equipment simulator, the present invention can complete experiment preparation in a short period of time. It has the effect of improving work efficiency.

[Brief explanation of the drawing]

[Figure 1] Detailed configuration diagram of main parts in Figure 2

[Figure 2] Configuration diagram of one embodiment of the present invention

[Figure 3] Configuration diagram of a conventional power system simulation device

[Figure 4] Detailed configuration diagram of main parts in Figure 3

[Explanation of symbols]

2 Simulated power system 5a Three-phase output terminal 5b Three-phase AC voltage 5c Three-phase AC current 6a Electric torque signal 7 Power generation function simulator 8 Circuit breaker (circuit switching section) 9 Automatic synchronization device 9a Voltage adjustment signal 9b Frequency adjustment signal 9c Opening/closing Command signal 10 Voltage setting operation 11 Voltage setting signal 12a Field voltage signal 13 Voltage control section 14b Power setting operation 15 Power setting signal 16a Setting frequency signal 16b Frequency setting operation 17 Frequency setting signal 20 Generator rotor simulator 20a Angular velocity signal 21 Signal Switching section 21a Angular frequency setting signal 22a Original machine torque signal 23 Original machine torque signal generation section 24 Phase difference detector 24a Phase difference signal 25 First subtractor 25a Deviation signal 26 First signal generation section 26a First signal 27 Power flow state setting Signal 28 First adder 28a Angular frequency signal 29 Angular frequency signal generator 30 Second subtracter 30a Second signal 31 Third signal generator 31a Third signal 32 Second adder 32a Mechanical torque signal 33 Mechanical torque signal generator 34 Power generation equipment simulator 35 Phase difference calculation unit 35a Phase difference setting signal

Claims (4)

[Claims] 1. A mechanical torque signal representing a mechanical torque Tm and an electric torque signal representing an electric torque Te are input, and the difference between the mechanical torque signal and the electric torque signal is integrated over time to generate a generator rotor. a generator rotor simulator that outputs an angular velocity signal representing an angular velocity ωr of A three-phase AC voltage having a corresponding voltage value V1 and a frequency F1 corresponding to the angular frequency represented by the angular frequency setting signal is output to the three-phase output terminal, and based on the three-phase AC current flowing to the three-phase output terminal. a power generation function simulator that outputs the electric torque signal, an electric circuit switching section that opens and closes the electrical connection of the three-phase output terminal to the simulated power system according to the input switching command signal, and an arbitrary one of the electric circuit switching section. The three-phase output terminal side voltage Vx1 and the simulated power system side voltage Vx2 in one phase are input, and the three-phase output terminal side voltage V
A voltage adjustment signal corresponding to the difference between x1 and the simulated power system side voltage Vx2 and the frequency F of the three-phase output terminal side voltage Vx1
1 and a frequency F2 of the simulated power system side voltage Vx2, and a voltage difference and frequency between the three-phase output terminal side voltage Vx1 and the simulated power system side voltage Vx2. an automatic synchronization device that outputs the opening/closing command signal when the difference and phase difference each become below the allowable value, and thereafter eliminates both the voltage adjustment signal and the frequency adjustment signal; and a voltage setting signal representing the target voltage Va and the voltage adjustment signal. By inputting the signal and the three-phase AC voltage, applying a voltage setting operation, and inputting the field voltage signal to the power generation function simulator, the arithmetic mean value of the voltage of each phase of the three-phase AC voltage is calculated as described above. A set voltage Vc according to the target value Va, the value of the voltage adjustment signal, and the voltage setting operation.
a voltage control unit that inputs a power setting signal representing a target power Pa, a frequency setting signal representing a target frequency Fa, the frequency adjustment signal and the angular velocity signal, and performs a power setting operation and a frequency setting operation. is added and outputs a setting frequency signal representing a setting frequency Fc corresponding to the target frequency Fa, the value of the frequency adjustment signal, and the frequency setting operation, and setting according to the target power Pa and the power setting operation. an original machine torque signal generation unit that performs a predetermined first calculation using the electric power Pc, the set frequency Fc, and the angular velocity ωr represented by the angular velocity signal and outputs an original machine torque signal according to the result of the first calculation; and the phase difference between the three-phase output terminal side voltage Vx1, the reference point voltage Vxz of the reference point Z as a desired point of the same phase as the voltage Vx1 in the simulated power system, and the voltage Vx1 and the reference point voltage Vxz. When the phase difference setting signal representing the target phase difference δz, which is the target value, and the setting frequency signal are input and the power flow state setting signal is not input, the angular frequency corresponding to the setting frequency Fc represented by the setting frequency signal is In a state where an angular frequency signal representing
an angular frequency signal generation unit that performs a second calculation under predetermined conditions using xz, the target phase difference δz, and the set frequency Fc, and outputs the angular frequency signal representing the angular frequency of the calculation result; a signal switching section that switches between the angular velocity signal and the angular frequency signal and outputs it as the angular frequency setting signal; and an angular velocity to which the angular velocity signal, the angular frequency signal, and the original machine torque signal are input and that the angular velocity signal represents. By outputting the machine torque signal having a value that is the sum of the value obtained by performing a predetermined control calculation on the difference between ωr and the angular frequency ωb represented by the angular frequency signal and the value of the original machine torque signal, a plurality of power generation equipment simulators comprising: a mechanical torque signal generating unit that causes the angular velocity ωr to follow the angular frequency ωb in a signal switching state in which the signal switching unit outputs the angular frequency signal as the angular frequency setting signal; and the power setting signal and the voltage setting signal that are input to all of the simulated power system and the specific power generation equipment simulator as the power generation equipment simulator that needs to be connected to this simulated power system, and the reference a phase difference calculation unit that outputs the phase difference setting signal to each of the specific power generation equipment simulators by inputting position data of point Z in the simulated power system; In the specific power generation equipment simulator, the signal switching unit is in a signal switching state in which the angular frequency signal is output as the angular frequency setting signal, and the electric circuit switching unit is in the closed state, and the second calculation is performed. In each of the specific power generation equipment simulators, the frequency F1 of the three-phase AC voltage is made equal to the set frequency Fc, and the three-phase output terminal side voltage Vx1 input to the angular frequency signal generator and the reference point The calculation is performed so that the phase difference between both voltages of Vxz becomes equal to the target phase difference δz represented by the phase difference setting signal inputted to the same angular frequency signal generation section, and the first calculation is performed based on the signal When the switching unit is in a signal switching state in which the angular velocity signal is output as the angular frequency setting signal and the electric circuit opening/closing unit is in the closed state, the mechanical torque signal and the electric torque signal are transmitted to the generator rotor simulator. An angular frequency at which the three-phase power output from the generator function simulator to the three-phase output terminal becomes equal to the set power Pc and the angular velocity ωr represented by the angular velocity signal corresponds to the set frequency Fc. An analog simulation device for a power system, characterized in that the calculation is made to be equal to ωc. 2. The simulation device according to claim 1, wherein the angular frequency signal generating section is controlled by a voltage V on the three-phase output terminal side.
a phase difference detector that detects a phase difference δ between x1 and a reference point voltage Vxz and outputs a phase difference signal representing the phase difference δ;
a first subtracter that receives the phase difference signal and the phase difference setting signal and outputs a deviation signal representing the difference (δz−δ) between the target phase difference δz represented by the phase difference setting signal and the phase difference δ; , if the power flow state setting signal is not input, the angular frequency value becomes zero, and if the deviation signal is input and the power flow state setting signal is input, proportional control calculation or proportional integral control calculation is performed for the deviation signal. a first signal generating section that outputs a first signal representing an angular frequency ωa at which the angular frequency value is equal to the result of these calculations; and a first adder that outputs an angular frequency signal representing the sum of the angular frequency ωc and the angular frequency ωc corresponding to the set frequency Fc represented by the set frequency signal. . 3. The simulation device according to claim 1, wherein the mechanical torque signal generator is configured to receive an angular velocity signal and an angular frequency signal, and to generate an angular frequency ωb represented by the angular frequency signal and an angular velocity ωr represented by the angular velocity signal. a second subtracter that outputs a second signal representing the difference between and a second adder that receives the signal and the original machine torque signal and outputs a machine torque signal having a value that is the sum of the value of the third signal and the value of the original machine torque signal. An analog simulation device for electric power systems. 4. A signal switching section that switches between an angular velocity signal outputted by a generator rotor simulator and an angular frequency signal specifying the frequency of an output voltage outputted by the power generation function simulator and inputs the signal to the power generation function simulator; a phase control means for causing the output voltage to be in a phase state that satisfies a predetermined initial power flow state in the simulated power system via the angular frequency ωb represented by the frequency signal; 1. An analog simulation device for a power system, comprising means for tracking ωb.