Power generation system, control device and program

Abstract

To efficiently perform synchronization control even when characteristics of a plurality of power generation facilities are different from each other.SOLUTION: A power generation system in an embodiment includes a plurality of power generation facilities, a circuit breaker, and a control device. The control device includes a setting unit, a prime mover control unit, a power generator control unit, a synchronization determination unit, and a circuit breaker control unit. The setting unit sets, for each power generation facility, a setting value related to control of the power generation facility. The prime mover control unit outputs, to each prime mover, a prime mover control signal for controlling the prime mover based on the setting value. The power generator control unit outputs, to each power generator, a power generator control signal for controlling the power generator based on the setting value. The synchronization determination unit determines whether an output voltage of a main power supply and an output voltage of the power generation facility synchronize with each other. The circuit breaker control unit controls the circuit breaker based on a result of determination by the synchronization determination unit.SELECTED DRAWING: Figure 3

Description

Technical Field

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[0001] Embodiments of the present invention relate to a power generation system, a control device, and a program.

Background Art

[0002] In facilities such as hospitals, there may be a plurality of emergency power generation facilities. When attempting to supply the output power of such emergency power generation facilities jointly with the output power of a main power source such as a commercial power source to a predetermined load (for example, medical equipment, etc.), a synchronization process for synchronizing the output voltage of the emergency power generation facilities and the output voltage of the main power source is required. At this time, if the characteristics of a plurality of emergency power generation facilities are different from each other, if the same control is implemented for all the emergency power generation facilities, the synchronization process may not be efficiently performed.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Patent Document 2

Patent Document 3

Summary of the Invention

Problems to be Solved by the Invention

[0004] The problem to be solved by the embodiments of the present invention is to provide a power generation system, a control device, and a program capable of efficiently performing synchronization control even when the characteristics of a plurality of power generation facilities are different from each other.

Means for Solving the Problems

[0005] The power generation system of the embodiment comprises a plurality of power generation equipment, a circuit breaker, and a control device. Each of the plurality of power generation equipment comprises a prime mover and a generator that generates electricity using the power of the prime mover. The circuit breaker switches the connection state between the main power supply and the load, and the connection state between at least one of the plurality of power generation equipment and the load. The control device controls the power generation equipment and the circuit breaker. The control device comprises a setting unit, a prime mover control unit, a generator control unit, a synchronization determination unit, and a circuit breaker control unit. The setting unit sets setting values ​​for the control of each power generation equipment. The prime mover control unit outputs a prime mover control signal to each prime mover to control the prime mover based on the setting value. The generator control unit outputs a generator control signal to each generator to control the generator based on the setting value. The synchronization determination unit determines whether the output voltage of the main power supply and the output voltage of the power generation equipment are synchronized. The circuit breaker control unit controls the circuit breaker based on the determination result of the synchronization determination unit. The set values ​​include a prime mover set value, which is determined for each prime mover based on its responsiveness, and a generator set value, which is determined for each generator based on its responsiveness, for its output period of the prime mover control signal. The prime mover control unit outputs a prime mover control signal to each prime mover based on the prime mover set value, with an output period corresponding to each prime mover. The generator control unit outputs a generator control signal to each generator based on the generator set value, with an output period corresponding to each generator. [Brief explanation of the drawing]

[0006] [Figure 1] Figure 1 shows an example of the configuration of the power generation system according to the embodiment. [Figure 2] Figure 2 is a block diagram showing an example of the hardware configuration of the control device according to the embodiment. [Figure 3] Figure 3 is a block diagram showing an example of the functional configuration of the control device of the embodiment. [Figure 4] Figure 4 shows an example of the data structure of the setting values ​​in the embodiment. [Figure 5] Figure 5 is a flowchart showing an example of processing by the control device of the embodiment. [Modes for carrying out the invention]

[0007] The embodiments will be described below with reference to the drawings.

[0008] Figure 1 shows an example of the configuration of the power generation system 1 of the embodiment. The power generation system 1 is a system that supplies power to predetermined loads (e.g., medical equipment, lighting, air conditioning equipment, etc.) in facilities such as hospitals, and has the function of enabling power supply to the loads even in emergencies such as power outages or reduced output of commercial power (an example of a main power source).

[0009] The power generation system 1 of this embodiment includes a plurality of power generation equipment 11A to 11F, a first circuit breaker 31, a second circuit breaker 41, and a control device 51.

[0010] Each of the multiple power generation equipment 11A to 11F is equipped with prime movers 21A to 21F and generators 22A to 22F. The prime movers 21A to 21F are mechanisms that generate power and may be configured using, for example, an engine, a fuel supply control device, etc. The generators 22A to 22F are mechanisms that generate electricity using the power from the prime movers 21A to 21F and may be configured using, for example, an alternator, an AVR (Automatic Voltage Regulator), etc.

[0011] In this embodiment, six power generation facilities 11A to 11F are provided. The first power generation facility 11A comprises a first prime mover 21A and a first generator 22A. The second power generation facility 11B comprises a second prime mover 21B and a second generator 22B. The third power generation facility 11C comprises a third prime mover 21C and a third generator 22C. The fourth power generation facility 11D comprises a fourth prime mover 21D and a fourth generator 22D. The fifth power generation facility 11E comprises a fifth prime mover 21E and a fifth generator 22E. The sixth power generation facility 11F comprises a sixth prime mover 21F and a sixth generator 22F. Note that the number of power generation facilities is not limited to those listed above.

[0012] The characteristics of at least one of the first to sixth prime movers 21A to 21F (for example, the first prime mover 21A) differ from those of the other prime movers (for example, the second prime mover 21B). Also, the characteristics of at least one of the first to sixth power generation units 22A to 22F (for example, the first generator 22A) differ from those of the other generators (for example, the second generator 22B). Characteristics may include, for example, responsiveness based on the model, specifications, etc. Responsiveness is an index based on, for example, the elapsed time from the time of receiving a control signal indicating a target value until the frequency (rotational speed) of the prime movers 21A to 21F or the output voltage value of the generators 22A to 22F reaches that target value. In this case, the shorter the elapsed time, the higher the responsiveness.

[0013] Furthermore, in this embodiment, the first, second, third, and fifth power generation facilities 11A, 11B, 11C, and 11E are dual-purpose power generation facilities used both under normal conditions (when commercial power is operating) and in emergencies, while the fourth and sixth power generation facilities 11D and 11F are emergency power generation facilities used only in emergencies. The dual-purpose power generation facilities 11A, 11B, 11C, and 11E are driven under predetermined conditions even under normal conditions (for example, when it is necessary to reduce power generation costs or increase output) and supply power to the load together with the commercial power supply.

[0014] The first circuit breaker 31 switches the connection state (ON / OFF) between the busbar 55, which is connected to the commercial power supply, and the six distribution lines 56A to 56F. The six distribution lines 56A to 56F are connected to the loads of the first to sixth generators 22A to 22F, respectively. The second circuit breaker 41 switches the connection state between each of the six distribution lines 56A to 56F and the load. The first circuit breaker 31 has six synchronization points 31A to 31F that can switch the connection state between the busbar 55 and each of the six distribution lines 56A to 56F. By individually controlling these synchronization points 31A to 31F, the connection state between the busbar 55 and each of the six distribution lines 56A to 56F can be switched individually. The second circuit breaker 41 has six synchronization points 41A to 41F that can switch the connection state between each of the six distribution lines 56A to 56F and the load. By individually controlling these synchronization points 41A to 41F, the connection status between each of the six distribution lines 56A to 56F and the load can be switched individually.

[0015] The control device 51 controls the power generation equipment 11A to 11F, the first circuit breaker 31, and the second circuit breaker 41. In emergencies such as a commercial power outage, the control device 51 controls the power generation equipment 11A to 11F, the first circuit breaker 31, and the second circuit breaker 41 so that power is supplied to the load by at least one of the power generation equipment 11A to 11F. In addition, when at least one of the power generation equipment 11A, 11B, 11C, and 11E, which are also used with the commercial power supply, jointly supplies power to the load, the control device 51 performs synchronization control to synchronize the output voltage of the combined power generation equipment 11A, 11B, 11C, and 11E with the output voltage (bus voltage) of the commercial power supply.

[0016] Figure 2 is a block diagram showing an example of the hardware configuration of the control device 51 of the embodiment. The control device 51 illustrated here includes a CPU (Central Processing Unit) 61, RAM (Random Access Memory) 62, ROM (Read Only Memory) 63, storage 64, communication I / F (Interface) 65, and user I / F 66.

[0017] The CPU 61 performs predetermined arithmetic processing and control processing using the RAM 62 as a working area according to programs stored in the ROM 63 and the storage 64. The storage 64 is a non-volatile memory such as a SSD (Solid State Drive) or a HDD (Hard Disk Drive), and stores programs, data, etc. necessary for the processing by the CPU 61. The communication I / F 65 is a device that enables signal transmission and reception with external devices (power generation facilities 11A to 11F, the first circuit breaker 31, the second circuit breaker 41, etc.) via an appropriate computer network. The user I / F 66 is a device that enables information transmission and reception between the control device 51 and a user (such as an administrator of the power generation system 1), and is, for example, a keyboard, a mouse, a touch panel mechanism, a microphone, a display, a speaker, etc. The CPU 61, the RAM 62, the ROM 63, the storage 64, the communication I / F 65, and the user I / F 66 are connected to each other via a bus so as to be communicable. Note that the hardware configuration of the control device 51 is not limited to the above.

[0018] FIG. 3 is a block diagram showing an example of the functional configuration of the control device 51 of the embodiment. The control device 51 of the present embodiment includes a setting unit 101, a prime mover control unit 102, a generator control unit 103, a synchronization determination unit 104, a circuit breaker control unit 105, and an alarm output unit 106. These functional components 101 to 106 are realized, for example, by the cooperation of the hardware configuration and the program shown in FIG. 2. Note that these functional elements 101 to 106 may be configured by a plurality of physically divided hardware.

[0019] The setting unit 101 sets setting values 111 related to the control of the power generation facilities 11A to 11F for each of the power generation facilities 11A to 11F. The setting value 111 is information based on the characteristics of the prime movers 21A to 21F or the generators 22A to 22F of the power generation facilities 11A to 11F, and acts to improve the efficiency of synchronization control for synchronizing the output voltages of the power generation facilities 11A to 11F and the output voltage of the commercial power supply. The setting of the setting value 111 can be executed using an appropriate method, and can be realized, for example, by the user operating the user I / F 66 of the control device 51 to input it.

[0020] FIG. 4 is a diagram showing an example of the data structure of setting value 111 according to the embodiment. As shown in FIG. 4, the setting value 111 includes a frequency command output period and a voltage value command output period determined for each of the power generation facilities 11A to 11F.

[0021] The frequency command output period is a value indicating the period (pulse width) for outputting a frequency command, which is a prime mover control signal for transmitting a target frequency to each of the prime movers 21A to 21F. The frequency command output period is set so that it becomes longer as the responsiveness of each of the prime movers 21A to 21F is higher. That is, the frequency command is set to be output more frequently as the responsiveness of the prime movers 21A to 21F is lower. In the example shown in FIG. 4, since the responsiveness of the first prime mover 21A is lower than that of the second prime mover 21B, the frequency command output period (1S) of the first power generation facility 11A is set shorter than the frequency command output period (3S) of the second power generation facility 11B.

[0022] The voltage value command output period is a value indicating the period for outputting a voltage value command, which is a generator control signal for transmitting a target voltage value (amplitude) to each of the generators 22A to 22F. The voltage value command output period is set so that it becomes longer as the responsiveness of each of the generators 22A to 22F is higher, similar to the frequency command period. That is, the voltage value command is set to be output more frequently as the responsiveness of the generators 22A to 22F is lower.

[0023] Returning to FIG. 3, the prime mover control unit 102 outputs a prime mover control signal for controlling the prime movers 21A to 21F to each of the prime movers 21A to 21F based on the setting value 111. The prime mover control unit 102 generates a prime mover control signal for each of the prime movers 21A to 21F based on FB (feedback) signals (for example, the difference between the current frequency and the target frequency, etc.) from each of the prime movers 21A to 21F. When the setting value 111 includes the frequency command output period as described above, the prime mover control unit 102 outputs a frequency command as the prime mover control signal at an output period corresponding to the power generation facilities 11A to 11F that are the control targets.

[0024] The generator control unit 103 outputs generator control signals to each generator 22A to 22F to control the generators 22A to 22F based on the set value 111. The generator control unit 103 generates generator control signals for each generator 22A to 22F based on the FB signal from each generator 22A to 22F (for example, the difference between the current output voltage value and the target voltage value). If the set value 111 includes the above-mentioned voltage value command output cycle, the generator control unit 103 outputs the voltage value command as the generator control signal at the output cycle corresponding to the power generation equipment 11A to 11F to be controlled.

[0025] The synchronization determination unit 104 determines whether the output voltage (bus voltage) of the commercial power supply and the output voltages of the power generation equipment 11A to 11F are synchronized. The synchronization determination can be performed using an appropriate method, but for example, synchronization is determined to be complete when the voltage value and phase of the output voltage of the power generation equipment subject to synchronization control (at least one of the multi-purpose power generation equipment 11A, 11B, 11C, 11E) and the voltage value and phase of the bus voltage fall within a predetermined error range.

[0026] The circuit breaker control unit 105 controls the first circuit breaker 31 and the second circuit breaker 41 based on the determination result of the synchronization determination unit 104. Specifically, if it is determined that the output voltage and bus voltage of the power generation equipment 11A to 11F to be synchronized are synchronized, the first circuit breaker 31 and the second circuit breaker 41 are controlled so that the output voltage and bus voltage of the power generation equipment 11A to 11F are supplied to the load. For example, if the first power generation equipment 11A is the target of synchronization, after synchronization is complete, synchronization points 31A and 41A are turned ON, and the other synchronization points 31B to 31F and 41B to 41F are turned OFF. On the other hand, if it is determined that the output voltage and bus voltage of the power generation equipment 11A to 11F to be synchronized are not synchronized, the first circuit breaker 31 and the second circuit breaker 41 are controlled so that the output voltage and bus voltage of the power generation equipment 11A to 11F are not supplied to the load.

[0027] The alarm output unit 106 performs processing to output an alarm if, after the start of synchronization control that synchronizes the output voltage of the commercial power supply with the output voltage of the power generation equipment 11A to 11F, the state of non-synchronization continues for a predetermined period of time or longer.

[0028] Figure 5 is a flowchart showing an example of processing by the control device 51 of the embodiment. Here, we will explain synchronous control that synchronizes the output voltage of the first power generation equipment 11A with the output voltage (bus voltage) of the commercial power supply.

[0029] When synchronous control is started, the prime mover control unit 102 calculates a target frequency based on the comparison result between the bus voltage frequency Fb (see Figure 1) and the output voltage frequency F1 (see Figure 1) of the first power generation equipment 11A (S101). The prime mover control unit 102 outputs a frequency command (prime mover control signal) indicating the target frequency at a specific frequency command output period (e.g., 1S) corresponding to the first power generation equipment 11A (S102). The generator control unit 103 calculates a target voltage value based on the comparison result between the bus voltage value Vb (see Figure 1) and the output voltage value V1 (see Figure 1) of the first power generation equipment 11A (S103). The power generation control unit 103 outputs a voltage value command (generator control signal) indicating the target voltage value at a specific voltage value command output period corresponding to the first power generation equipment 11A (S104).

[0030] The synchronization determination unit 104 determines whether or not synchronization between the output voltage of the first power generation equipment 11A and the bus voltage has been completed (S105). If synchronization is completed (S105: Yes), the circuit breaker control unit 105 controls the first circuit breaker 31 and the second circuit breaker 41 so that the bus voltage and the output voltage from the first power generation equipment 11A are supplied to the load (so that only synchronization points 31A and 41A are turned ON) (S106).

[0031] On the other hand, if synchronization is not completed (S105: No), the alarm output unit 106 determines whether a predetermined time has elapsed since the start of synchronization control (S107). If the predetermined time has not elapsed (S107: No), the process returns to step S101. If the predetermined time has elapsed (S108: Yes), the alarm output unit 106 outputs an alarm to the user I / F 66 to notify of an abnormality in synchronization control, etc. (S108).

[0032] As described above, according to this embodiment, synchronous control is performed based on set values ​​that are determined based on the characteristics of the prime mover and generator. This makes it possible to efficiently perform synchronous control even when different prime movers and generators are used in multiple power generation facilities.

[0033] The program that causes the control device 51 (computer) to execute the processing necessary to realize the above-described functions can be provided as an installable or executable file recorded on a computer-readable recording medium such as a CD (Compact Disc)-ROM, flexible disk (FD), CD-R (Recordable), or DVD (Digital Versatile Disk). Furthermore, the program may be provided or distributed via a network such as the Internet.

[0034] Although embodiments of the present invention have been described above, these embodiments are presented as examples and are not intended to limit the scope of the invention. The novel embodiments described above can be implemented in various other forms, and various omissions, substitutions, and modifications can be made without departing from the spirit of the invention. Embodiments and their variations are included in the scope and spirit of the invention, as well as in the claims of the invention and its equivalents. [Explanation of symbols]

[0035] 1...Power generation system, 11A~11F...Power generation equipment, 21A~21F...Prime mover, 22A~22F...Generator, 31...First circuit breaker, 41...Second circuit breaker, 51...Control device, 55...Bus line, 56A~56F...Distribution line, 101...Setting unit, 102...Prime mover control unit, 103...Generator control unit, 104...Synchronization determination unit, 105...Circuit breaker control unit, 106...Alarm output unit, 111...Set value

Claims

1. Multiple power generation facilities, each equipped with a prime mover and a generator that generates electricity using the power of the prime mover, A circuit breaker that switches the connection state between the main power supply and the load, and the connection state between at least one of the multiple power generation equipment and the load, A control device that controls the power generation equipment and the circuit breaker, Equipped with, The control device is A setting unit for setting set values ​​related to the control of each power generation facility, A motor control unit that outputs a motor control signal to each of the motors for controlling the motors based on the set value, A generator control unit that outputs a generator control signal to each of the generators for controlling the generators based on the set value, A synchronization determination unit that determines whether the output voltage of the main power supply and the output voltage of the power generation equipment are synchronized, A circuit breaker control unit that controls the circuit breaker based on the determination result of the synchronization determination unit, Equipped with, The aforementioned setting value includes a prime mover setting value, which is determined based on the responsiveness of the prime mover control signal output period for each prime mover, and a generator setting value, which is determined based on the responsiveness of the generator control signal output period for each generator. The prime mover control unit outputs the prime mover control signal to each prime mover at an output period corresponding to each prime mover, based on the prime mover set value. The generator control unit outputs a generator control signal to each generator at an output cycle corresponding to each generator, based on the generator set value. Power generation system.

2. An alarm output unit performs processing to output an alarm if, after the start of synchronization control to synchronize the output voltage of the main power supply and the output voltage of the power generation equipment, the state of non-synchronization continues for a predetermined time or longer. The power generation system according to claim 1, further comprising:

3. A control device for controlling a plurality of power generation facilities, each comprising a prime mover and a generator that generates electricity using the power of the prime mover, and a circuit breaker that switches the connection state between a main power source and a load, and the connection state between at least one of the plurality of power generation facilities and the load, A setting unit for setting set values ​​related to the control of each power generation facility, A motor control unit that outputs a motor control signal to each of the motors for controlling the motors based on the set value, A generator control unit that outputs a generator control signal to each of the generators for controlling the generators based on the set value, A synchronization determination unit that determines whether the output voltage of the main power supply and the output voltage of the power generation equipment are synchronized, A circuit breaker control unit that controls the circuit breaker based on the determination result of the synchronization determination unit, Equipped with, The aforementioned setting value includes a prime mover setting value, which is determined based on the responsiveness of the prime mover control signal output period for each prime mover, and a generator setting value, which is determined based on the responsiveness of the generator control signal output period for each generator. The prime mover control unit outputs the prime mover control signal to each prime mover at an output period corresponding to each prime mover, based on the prime mover set value. The generator control unit is a control device that outputs a generator control signal to each of the generators at an output cycle corresponding to each of the generators, based on the generator set value.

4. A computer controls a plurality of power generation facilities, each comprising a prime mover and a generator that generates electricity using the power of the prime mover, and a circuit breaker that switches the connection state between the main power source and the load, and the connection state between at least one of the plurality of power generation facilities and the load. A process for setting control values ​​for each of the aforementioned power generation facilities based on the responsiveness of the power generation facilities, A process for outputting a prime mover control signal to each prime mover at an output period determined based on the responsiveness of each prime mover, based on the set value, A process for outputting a generator control signal to each generator at an output period determined based on the responsiveness of each generator, for controlling the generator based on the set value, A process for determining whether the output voltage of the main power supply and the output voltage of the power generation equipment are synchronized, A process for controlling the circuit breaker based on the determination result of whether or not the output voltage of the main power supply and the output voltage of the power generation equipment are synchronized, The program to be executed.

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