Power generation system and power generation control method

Abstract

To enable a power generation system to operate for a long time, enable it to have a long life, and reduce failure.SOLUTION: A power generation system comprises: multiple power generators for generating electric powers; and multiple power generator controllers for controlling the power generators. In the power generation system, the multiple power generator controllers of the power generators are connected to each other so as to be able to mutually communicate through communication wires. The power generator controllers set the power generators to be controlled into one of the operation modes of a FULL operation mode in which the power generators share a load within the rated capacity, a HALF operation mode in which they share a load within half the rated capacity, an ECO operation mode in which they share a load according to the efficiency of their fuel consumption, and a NOLOAD operation mode in which they do not share a load; collect information about the other power generator controllers and the output states and operation modes of the other power generators; and control the output states of the power generators.SELECTED DRAWING: Figure 4

Description

Technical Field

[0001] The present disclosure relates to a power generation system and a power generation control method.

Background Art

[0002] A self - power generation system that supplies power to a load using a plurality of self - power generation devices operating in parallel is disclosed, for example, in Patent Document 1.

[0003] Patent Document 1 discloses an autonomous distributed control type power generation system in which a plurality of power generation devices are connected to a load bus to which a load is connected, and a power generation device controller is provided corresponding to each power generation device to control the corresponding power generation device. Each power generation device controller grasps the rated capacity and the current output power of the corresponding power generation device, exchanges information with other power generation device controllers, and collects information about the rated capacity and the current output power of other power generation devices. Each power generation device controller calculates the load sharing amount of the corresponding power generation device within the range of the rated capacity from the collected information, and controls the corresponding power generation device according to the calculated load sharing amount.

Prior Art Documents

Patent Documents

[0004]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0005] However, in the conventional power generation system, the control is only made such that each power generation device shares the load according to the rated capacity ratio, and the control does not take into account the characteristics and states of each power generation device. For example, fine control such as load sharing control for suppressing fuel consumption and reducing the load on an old and deteriorated generator is not performed, and in some cases, the operation of a power generation device may be controlled in an overload state. Therefore, it is desired to extend the operation time by reducing fuel consumption and to extend the life of an old generator by reducing the load.

[0006] The present disclosure has been made in view of the above circumstances, and aims to enable long-term operation of a power generation system, enable the power generation system to have a long service life, and make it difficult for failures to occur.

Means for Solving the Problems

[0007] In order to achieve the above object, the power generation system of the present disclosure includes a plurality of power generation devices that generate power and power generation device controllers that control the power generation devices, and the power generation device controllers of the plurality of power generation devices are connected to each other via a communication line so as to be communicable with each other. The power generation device controller sets the power generation device to be controlled to any one of a FULL operation mode in which the load is shared within the rated capacity range, a HALF operation mode in which the load is shared within half of the rated capacity range, an ECO operation mode in which the load is shared according to the fuel consumption efficiency, and a NOLOAD operation mode in which the load is not shared, collects information on the output state and operation mode of other power generation devices and other power generation device controllers, and controls the output state of the power generation device.

Effects of the Invention

[0008] According to the present disclosure, by controlling each power generation device in consideration of the characteristics of each power generation device, it is possible to enable long-term operation of the power generation system, enable the power generation system to have a long service life, and make it difficult for failures to occur.

Brief Description of the Drawings

[0009]

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Figure 6

Figure 7

Mode for Carrying Out the Invention

[0010] Hereinafter, embodiments of the power generation system of the present disclosure will be described in detail with reference to the drawings.

[0011] (First Embodiment) In FIG. 1, the self - power generation system 1 includes a load bus BL to which various loads L are connected, a plurality of self - power generation devices No.1, No.2, ··· No.n (G1, G2, ··· Gn) each connected to the load bus BL via a generator main circuit Mc1 and a generator circuit breaker CBg, and self - power generation device controllers No.1, No.2, ··· No.n (Crl1, Crl2, ··· Crln) provided corresponding to each of the self - power generation devices G1, G2, ··· Gn respectively. The self - power generation device controllers input output state information, which is the current output power of the corresponding monitored and controlled self - power generation device, through a current detector composed of an instrument current transformer CT and a voltage detector composed of an instrument voltage transformer VT as a power detector, and issue various control commands Ci1, Ci2, ··· Cin to the monitored and controlled self - power generation device. The self - power generation device controllers also include a communication line CL, which is a transmission medium for mutually transmitting and receiving the state information of the corresponding self - power generation devices to be monitored and controlled among the self - power generation device controllers Crl1, Crl1, ··· Crln. For simplicity of explanation, only two self - power generation devices and self - power generation device controllers are shown in the figure, and the self - power generation device ··· No.n (Gn) and the self - power generation device controller ··· Crln are omitted from the illustration.

[0012] The self - power generation device controllers Crl1, Crl2, ··· Crln are the same products in terms of the product, all having the same configuration and the same functions. As illustrated in FIG. 2, each of them has functional parts such as a start - stop control part Crla, a synchronization input control part Crlb, a self - generator control mode setting part Crlc, a self - generator load sharing operation control part Crld, a self - generator output quantity input / output part Crle, an output state information input part of other generators Crlf, a rated value storage part of each generator Crlg, a self - generator operation mode setting part Crlh, and an operation mode storage part of each generator Crli.

[0013] The start - stop control part Crla is a functional part for controlling the start and stop of the corresponding self - power generation device. The synchronization input control part Crlb is a functional part for controlling the synchronization input during the parallel connection of the corresponding self - power generation device.

[0014] The self - generator control mode setting unit Crlc is a functional unit that sets the control of the corresponding in - house generator to the load sharing control mode for automatic control or the manual mode for manual control. The load sharing control mode is a mode that calculates the load sharing amount of the corresponding in - house generator from the information collected from other in - house generator controllers and controls the corresponding generator according to the calculated load sharing amount. There are four operation modes in the load sharing control mode: FULL operation mode, HALF operation mode, ECO operation mode, and NOLOAD operation mode. The manual mode is a mode in which automatic load sharing control is not performed, and the operator adjusts to a predetermined load using the load increase / decrease switch provided on the control panel.

[0015] The self - generator load sharing calculation and control unit Crld is a functional unit that calculates the load sharing amount of each in - house generator during steady operation, including the current output state information of its own corresponding in - house generator, based on the current output state information, operation mode information, fault information, and maintenance information of their corresponding in - house generators obtained from all other in - house generator controllers, and calculates the target control amount (the difference between the load sharing amount of its own corresponding in - house generator and the current power generation amount) for controlling the corresponding in - house generator so that its own corresponding in - house generator generates electricity corresponding to the shared load amount.

[0016] The self - generator output quantity input / output unit Crle is a functional unit that inputs information on the output voltage and output current of its own corresponding in - house generator from the outputs of current detectors such as instrument current transformers CT and instrument voltage transformers VT connected to the main circuit Mc1 of the generator of its own corresponding in - house generator.

[0017] The other - generator output state information input unit Crlf is a functional unit that inputs the current output state information, operation mode information, fault information, maintenance information, etc. of their corresponding in - house generators from all other in - house generator controllers via the communication line CL.

[0018] Each generator rating storage unit Crlg is a functional unit that pre-stores the generator rated output values of its corresponding in-house power generation device and all other in-house power generation devices, i.e., all in-house power generation devices of the in-house power generation system 1, prior to load sharing control. Note that the generator rated output values of all in-house power generation devices may be input in advance, but it is more flexible and accurate to respond to changes in the system scale if each in-house power generation device controller collects the generator rated output values of its corresponding in-house power generation device from all other in-house power generation device controllers. The collection may be input together with the current output state information, operation mode information, failure information, maintenance information, etc. of the in-house power generation device, or may be input separately from the information.

[0019] The self-generator operation mode setting unit Crlh is a functional unit that sets the operation mode of its corresponding in-house power generation device. There are four operation modes: the aforementioned FULL operation mode, HALF operation mode, ECO operation mode, and NOLOAD operation mode. The power generation device set to the FULL operation mode controls its output within a range not exceeding the rated capacity of electric power. The power generation device set to the HALF operation mode controls its output within a range not exceeding half of the rated capacity of electric power. The power generation device set to the ECO operation mode controls its output with the highest output electric power with respect to fuel consumption, i.e., with the highest power generation efficiency. It is necessary to preset the most efficient output electric power. The power generation device set to the NOLOAD operation mode is controlled to not transmit power to the load as much as possible.

[0020] Each generator operation mode storage unit Crli is a functional unit that pre-stores the operation modes of its corresponding in-house power generation device and all other in-house power generation devices, i.e., all in-house power generation devices of the in-house power generation system, prior to load sharing control. Note that the operation modes of all in-house power generation devices may be input in advance, but it is more flexible and accurate to respond to changes in the operation mode if each in-house power generation device controller collects the operation modes of its corresponding in-house power generation device from all other in-house power generation device controllers. The collection may be input together with the current output state information, failure information, maintenance information, etc. of the in-house power generation device, or may be input separately from the information.

[0021] FIG. 3 is a block diagram showing the hardware configuration of the self-power generation device controller Crl. It is composed of a non-volatile storage medium and stores a control program that defines the procedures for the above-mentioned self-power generation load sharing operation control, start / stop control, and synchronization input control. A storage unit 10, a RAM (Random Access Memory) 11 serving as a main memory composed of a volatile storage medium, a communication I / F (InterFace) 12 for communicating with other self-power generation device controllers Crl, and a CPU (Central Processing Unit) 13 for executing the control program are connected by a bus 14. The storage unit 10 further stores the control mode of the generator, the rated power, the operation mode, etc.

[0022] FIG. 4 shows, as an example, a schematic diagram of information exchange communication between four self-power generation device controllers Crl1, Crl2, Crl3, and Crl4. As illustrated in FIG. 4, each self-power generation device controller Crl1, Crl2, Crl3, and Crl4 transmits information on the current output state of its own unit (its corresponding self-power generation device) and operation mode information to other self-power generation device controllers via the communication line CL. Each self-power generation device controller Crl1, Crl2, Crl3, and Crl4 receives information on the current output state, operation mode information, and rated output value of all the connected self-power generation devices. In this way, the information exchanged between the self-power generation device controllers Crl1, Crl2, Crl3, and Crl4 is only the output state signal, operation mode information, and rated output value of the self-power generation device, and control system signals and control system data such as control target values and control command values are not exchanged by communication.

[0023] Next, the operation of the load sharing process of each self-power generation device controller No.1, No.2, ··· No.n (Crl1, Crl2, ··· Crln) in the load sharing control mode for automatically controlling the self-power generation device will be described with reference to FIG. 5.

[0024] In FIG. 5, when the self-power generation device controller Crl of the self-power generation device starts the load sharing process, it transmits the status information (current load sharing amount (generator output)) and operation mode information of its own device to all other self-power generation device controllers Crl, and further receives the status information and operation mode information of all other self-power generation devices from all other self-power generation device controllers Crl (step S101).

[0025] Next, the self-power generation device controller Crl checks the rated power of its own device (self-power generation device No.n) (step S102). Next, it reads out the preset output power amount in the ECO operation mode that operates at the output power with the lowest fuel consumption rate from the storage unit 10, and calculates the ECO mode coefficient α with respect to the rated power (step S103). Next, in the load sharing control mode, the self-power generation device controller Crl determines whether the self-power generation system 1 can output the power required for the load amount of the load L, that is, whether the load sharing control mode is established (step S104). The determination of whether the load sharing control mode is established is made based on whether the total load sharing capacity corresponding to the operation mode of each self-power generation device G exceeds the load amount of the load L. If the total load sharing capacity corresponding to the operation mode of each self-power generation device is within the range of the load amount of the load L, it is determined that the load sharing control mode is established (step S104: Yes), and then the operation mode of its own device is checked (step S105). Conversely, if the total load sharing capacity corresponding to the operation mode of each self-power generation device exceeds the load amount of the load L, it is determined that the load sharing control mode is not established (step S104: No), and the operation mode of its own device is forcibly set to the FULL operation mode that controls the output within the range not exceeding the rated capacity power amount (step S106), and then the operation mode of its own device is checked (step S105).

[0026] In step S105, the self-generation device controller Crl checks whether the operation mode of the own unit is the FULL operation mode. If the operation mode of the own unit is the FULL operation mode (step S105: Yes), the upper limit of the power generation target power is set to the rated power (step S107). If the operation mode of the own unit is not the FULL operation mode (step S105: No), the self-generation device controller Crl checks whether the operation mode of the own unit is the HALF operation mode (step S108). If the operation mode of the own unit is the HALF operation mode (step S108: Yes), the upper limit of the power generation target power is set to 1 / 2 of the rated power (step S109). If the operation mode of the own unit is not the HALF operation mode (step S108: No), the self-generation device controller Crl checks whether the operation mode of the own unit is the NOLOAD operation mode (step S110). If the operation mode of the own unit is the NOLOAD operation mode (step S110: Yes), the power generation target power is set to 0, and control is performed to avoid power transmission to the load as much as possible (step S111). If the operation mode of the own unit is not the NOLOAD operation mode (step S110: No), the self-generation device controller Crl checks whether the operation mode of the own unit is the ECO operation mode (step S112). If the operation mode of the own unit is the ECO operation mode (step S112: Yes), the power generation target power is set to the value obtained by multiplying the rated power by the ECO mode coefficient α obtained in step S103 (step S113). If the operation mode of the own unit is not the ECO operation mode (step S112: No), assuming that it is a conventional load sharing control mode in which the operation mode is not set, the operation mode is forcibly set to the FULL operation mode in which operation is performed within the rated capacity range (step S106).

[0027] When the target power according to the operation mode is obtained, subsequently, the control target value of the own unit is calculated (step S114). The own power generation device controller Crl determines the load sharing amount of the own unit from the state information of the outputs of all the own power generation devices including the state information of the output of the own unit (current load sharing amount (generator output)) and the operation mode information of all the own power generation devices including the operation mode information of the own unit, and calculates the control target value of the own unit to be this determined load sharing amount. Specifically, the current load sharing amount (generator output) of each own power generation device is obtained from the state information of the outputs of all the own power generation devices including the state information of the output of the own unit, and these are totaled to obtain the load amount of the load L. When the load amount is obtained, the load sharing amount for the load amount of the load L of each own power generation device according to the operation mode is obtained as the control target value.

[0028] Next, the own power generation device controller Crl outputs a control command corresponding to the control target value of the own unit to the own unit (step S115). When the control command is output, the own power generation device controller Crl executes control such that the output of the own unit becomes the load sharing amount based on the control target value while checking the state (generator output) of the own unit (step S116). When the process of step S116 ends, it returns to step S101 and repeats the operations after step S101. These operations are performed automatically.

[0029] Here, in the above flowchart, for the processing operation of step S101 where the status information and operation mode information of the own unit are transmitted as Crl to all other home power generation device controllers and the status information and operation mode information of all other home power generation devices are received from all other home power generation device controllers Crl, the case where there are four home power generation device controllers of home power generation device controllers No. 1, No. 2, No. 3, and No. 4 (Crl1, Crl2, Crl3, Crl4) will be described as an example. FIG. 6 shows the details of the processing operation of step S101 in each of the home power generation device controllers Crl1 to Crl4. (a) shows the details of the processing operation of step S101 for the home power generation device controller No. 1 (Crl1), (b) shows the details of the processing operation of step S101 for the home power generation device controller No. 2 (Crl2), (c) shows the details of the processing operation of step S101 for the home power generation device controller No. 3 (Crl3), and (d) shows the details of the processing operation of step S101 for the home power generation device controller No. 4 (Crl4). When the home power generation device controller No. 1 (Crl1) confirms the output state of the own unit (home power generation device No. 1) in step S116 of FIG. 5, it transmits the data signals of the output state and operation mode of the own unit (home power generation device No. 1) (step S201). When the transmission in step S201 is made, the home power generation device controllers No. 2 (Crl2), No. 3 (Crl3), and No. 4 (Crl4) receive the transmitted data of the home power generation device controller No. 1 (Crl1) respectively (steps S301, S401, S501).

[0030] Also, when the home power generation device controller No. 2 (Crl2) receives the transmitted data of the home power generation device controller No. 1 (Crl1) (step S301), it is triggered to transmit the data signals of the output state and operation mode of the own unit (home power generation device No. 2) confirmed in step S116 of FIG. 5 (step S302). When the transmission in step S302 is made, the home power generation device controllers No. 1 (Crl1), No. 3 (Crl3), and No. 4 (Crl4) receive the transmitted data of the home power generation device controller No. 2 (Crl2) respectively (steps S202, S402, S502).

[0031] Also, taking as a trigger the reception of the transmission data of the self - power generation device controller No.2 (Crl2) by the self - power generation device controller No.3 (Crl3) (step S402), the data signals of the output state and the operation mode of the own machine (self - power generation device No.3) confirmed in step S116 of FIG. 5 are transmitted (step S403). When the transmission in step S403 is made, the self - power generation device controllers No.1 (Crl1), No.2 (Crl2), and No.4 (Crl4) receive the transmission data of the self - power generation device controller No.3 (Crl3), respectively (steps S203, S303, S503).

[0032] Also, taking as a trigger the reception of the transmission data of the self - power generation device controller No.3 (Crl3) by the self - power generation device controller No.4 (Crl4) (step S503), the data signals of the output state and the operation mode of the own machine (self - power generation device No.4) are transmitted (step S504). When the transmission in step S504 is made, the self - power generation device controllers No.1 (Crl1), No.2 (Crl2), and No.3 (Crl3) receive the transmission data of the self - power generation device controller No.4 (Crl4), respectively (steps S204, S304, S404). In this way, each of the self - power generation device controllers No.1 (Crl1), No.2 (Crl2), No.3 (Crl3), and No.4 (Crl4) transmits and receives the data signals of the output state and the operation mode in ascending order from No.1.

[0033] After collecting the information on the output states and operation modes of all of the self - power generation device controllers Crl1, Crl2, ··· Crln connected to the load bus BL, each self - power generation device controller calculates the control target value of the own machine (its corresponding self - power generation device) and outputs a control command to the own machine (its corresponding self - power generation device).

[0034] Next, when there are four self-power generation device controllers of the self-power generation device controllers No. 1, No. 2, No. 3, and No. 4 (Crl1, Crl2, Crl3, Crl4), that is, when four self-power generation devices of No. 1, No. 2, No. 3, and No. 4 are operating in parallel, a case of load sharing control will be described.

[0035] Figures 7(a) and (b) show, in the form of bar graphs, the output power shared by each of the self-power generation devices No. 1, No. 2, No. 3, and No. 4. Looking from the left on the paper surface, it shows the state of load sharing according to the rated capacity ratio. The height of the bar graph indicates the rated capacity of each of the self-power generation devices No. 1, No. 2, No. 3, and No. 4.

[0036] In Fig. 7(a), with respect to the in-house power generation devices No. 1, No. 2, and No. 3, the rated capacity of the in-house power generation device No. 4 is half, and the ratio of the rated capacities of the in-house power generation devices No. 1, No. 2, No. 3, and No. 4 is 2:2:2:1. The shaded part indicates the total power, that is, the total load amount, and is load-shared among the respective in-house power generation devices No. 1, No. 2, No. 3, and No. 4 according to the ratio of the rated capacities. On the other hand, the right side as seen from the paper surface shows the state of load sharing according to the operation mode. Here, the operation mode of the in-house power generation device No. 1 is the NOLOAD operation mode in which the power generation target power is set to 0 and control is performed to not transmit power to the load as much as possible. The operation mode of the in-house power generation device No. 2 is the HALF operation mode in which load sharing is performed at a capacity ratio of half of the rated capacity. The operation mode of the in-house power generation device No. 3 is the ECO operation mode in which operation is performed at the output power with the lowest fuel consumption rate. The operation mode of the in-house power generation device No. 4 is the FULL operation mode in which load sharing is performed at the rated capacity ratio. These operation modes are set by the user in advance. Since the operation mode of the in-house power generation device No. 1 is the NOLOAD operation mode, the load sharing amount is 0 and it is excluded from the target of load sharing. Also, since the operation mode of the in-house power generation device No. 3 is the ECO operation mode, the load sharing amount is the output power with the lowest preset fuel consumption rate. Since the operation mode of the in-house power generation device No. 2 is the HALF operation mode and the operation mode of the in-house power generation device No. 4 is the FULL operation mode, the remaining load sharing amount is determined by dividing the load amount obtained by subtracting the preset load sharing amount output by the in-house power generation device No. 3 in the ECO operation mode from the total load amount between the in-house power generation device No. 2 and the in-house power generation device No. 4. Here, the sharing ratio between the in-house power generation device No. 2 and the in-house power generation device No. 4 is 1 / 2 of the rated capacity for the in-house power generation device No. 2, and the rated capacity of the in-house power generation device No. 4 is 1 / 2 of the rated capacity of the in-house power generation device No. 2, and the sharing ratio between the two is 1:1. The shaded part is load-shared among the respective in-house power generation devices No. 1, No. 2, No. 3, and No. 4 according to the operation mode.

[0037] Next, FIG. 7(b) explains how to handle the case where the total load increases and exceeds the load that can be covered by the set load sharing when the load is shared according to the operation mode. Before the load increases, the operation mode of the self-power generation device No. 1 is set to the HALF operation mode, the operation mode of the self-power generation device No. 2 is set to the HALF operation mode, the operation mode of the self-power generation device No. 3 is set to the FULL operation mode, and the operation mode of the self-power generation device No. 4 is set to the NOLOAD operation mode. The total load is shared according to these operation modes. Here, when the total load increases and exceeds the maximum load that can be covered by the load sharing amount corresponding to the above operation mode, all the operation modes of the self-power generation devices No. 1, No. 2, No. 3, and No. 4 are forcibly changed and set to the FULL operation mode in which the load sharing is prorated according to the rated capacity ratio. Since the FULL operation mode shares the load according to the rated capacity ratio, the maximum allowable load is the largest. Therefore, even when a large load is connected in the load sharing control mode, the output power required for the load can be supplied.

[0038] (Second Embodiment) In the above-described embodiment, the user set the operation mode. In contrast, in the present embodiment, for a self-power generation device with a low fuel consumption rate, the load sharing amount is automatically set to the FULL operation mode with a large load sharing amount. A fuel transfer meter is connected between each self-power generation device and the fuel tank to measure the fuel consumption of each self-power generation device. Further, a power detector is connected between each self-power generation device and the circuit breaker to measure the output power of each self-power generation device. Here, the output power is measured through a current detector composed of an instrument current transformer CT and a voltage detector composed of an instrument voltage transformer VT as the power detector. The measured output power is used to obtain the output power per unit combustion consumption, that is, output power / fuel consumption, from the fuel consumption, and the fuel consumption efficiency of each self-power generation device is calculated. When the fuel consumption efficiency of each self-power generation device is obtained, the operation mode of the self-power generation device with the best fuel consumption efficiency is automatically set to the FULL operation mode. Further, among the self-power generation devices, the operation modes of half of the self-power generation devices with good fuel efficiency may be automatically set to the FULL operation mode. As a result, the fuel efficiency of the power generation system is improved.

[0039] (Third Embodiment) In the present embodiment, the self-power generation device controller performs a fault diagnosis or a fault prediction diagnosis on the corresponding self-power generation device. As a result of the fault diagnosis, for the self-power generation device diagnosed as having a fault, the self-power generation device controller automatically performs control to set the operation mode to the NOLOAD operation mode that does not transmit load as much as possible. Further, as a result of the fault prediction diagnosis, the self-power generation device controller may also automatically perform control to set the NOLOAD operation mode for the self-power generation device diagnosed as having a fault prediction. With the above configuration, the power generation system can operate stably without being affected by the faulty self-power generation device or the self-power generation device that may fail.

[0040] (Fourth Embodiment) In this embodiment, instead of directly inputting and setting the operation mode into the self - power generation device controller, by previously inputting the power generation device model and the device state (sound, in poor condition, operation not recommended, etc.), the self - power generation device controller automatically selects the operation mode according to the input information. For example, in the case of a self - power generation device using a diesel engine, due to the characteristics of the diesel engine, the fuel consumption is good, but low - load operation is not preferable. Therefore, an operation mode with a large load sharing amount is selected. Also, although the fuel consumption of a gas turbine is poor, it can perform low - load operation. Therefore, an operation mode with a small load sharing amount is selected. Further, by inputting the device state into the self - power generation device controller, fault diagnosis or fault omen diagnosis is performed according to the input items. As a result of the fault diagnosis or fault omen diagnosis, if it is diagnosed that there is a fault or a fault omen, the self - power generation device controller performs control to automatically change the operation mode of the corresponding self - power generation device to the NOLOAD operation mode. With the above configuration, the power generation system can operate stably without being affected by the faulty power generation device or the power generation device that may malfunction.

[0041] The present disclosure can be implemented in various embodiments and modifications without departing from the broad spirit and scope of the present disclosure. Also, the above - described embodiments are for explaining the present disclosure and do not limit the scope of the present disclosure. That is, the scope of the present disclosure is indicated not by the embodiments but by the claims. And various modifications made within the scope of the claims and within the scope of the meaning of the disclosure equivalent thereto are considered to be within the scope of the present disclosure.

[0042] (Appendix 1) A power generation system including a plurality of power generation devices that generate power and power generation device controllers that control the power generation devices, wherein the power generation device controllers of the plurality of power generation devices are communicably connected to each other via a communication line. The power generation device controller sets the power generation device to be controlled to one of the following operating modes: a FULL operation mode in which the load is shared within the rated capacity range, a HALF operation mode in which the load is shared within half of the rated capacity range, an ECO operation mode in which the load is shared according to the fuel consumption efficiency, and a NOLOAD operation mode in which the load is not shared. The controller collects information on the output states and the operating modes of other power generation devices and their controllers, and controls the output state of the power generation device. Power generation system. (Appendix 2) When the plurality of power generation devices cannot output the power required for the load, the power generation device controllers of the plurality of power generation devices set the operating modes of the plurality of power generation devices to the FULL operation mode. The power generation system according to Appendix 1. (Appendix 3) The power generation device controllers of the plurality of power generation devices calculate the fuel consumption efficiencies of the plurality of power generation devices, and set the power generation device with the best fuel consumption efficiency, or a plurality of power generation devices with good fuel consumption efficiencies, to the FULL operation mode. The power generation system according to Appendix 1 or 2. (Appendix 4) The power generation device controller performs a failure diagnosis or a failure prediction diagnosis on the power generation device, and sets the power generation device diagnosed as having a failure or a failure prediction to the NOLOAD operation mode as a result of the failure diagnosis or the failure prediction diagnosis. The power generation system according to any one of Appendices 1 to 3. (Appendix 5) The power generation device controller automatically selects the operating mode according to the power generation device model or the device state input for the power generation device. The power generation system according to any one of Appendices 1 to 4. (Appendix 6) A power generation control method for a power generation system including a plurality of power generation devices that generate power and power generation device controllers that control the power generation devices, wherein the power generation device controllers of the plurality of power generation devices are communicably connected to each other via a communication line. The step of setting the power generation device controller to any one of a FULL operation mode in which the power generation device to be controlled shares the load within the rated capacity range, a HALF operation mode in which the load is shared within half of the rated capacity range, an ECO operation mode in which the load is shared according to fuel consumption efficiency, and a NOLOAD operation mode in which the load is not shared; The step of collecting information on the output states of other power generation device controllers and other power generation devices and the operation mode, and controlling the output state of the power generation device; A power generation control method comprising the above.

Explanation of Signs

[0043] 1 Self-power generation system, 10 Storage unit, 11 RAM, 12 Communication I / F, 13 CPU, 14 Bus, G1, G2 Self-power generation devices, CT Instrument current transformer, VT Instrument voltage transformer, CBg Generator circuit breaker, Ci1, Ci2 Control commands, Crl, Crl1, Crl2, Crl3, Crl4 Self-power generation device controllers, CL, CL1, CL2 Communication lines, Mc1 Generator main circuit, BL Load bus, L Load, Crla Start / stop control unit, Crlb Synchronous input control unit, Crlc Self-generator control mode setting unit, Crld Self-generator load sharing arithmetic control unit, Crle Self-generator output quantity input / output unit, Crlf Other generator output state information input unit, Crlg Each generator rated storage unit, Crlh Self-generator operation mode setting unit, Crli Each generator operation mode storage unit.

Claims

1. A power generation system including a plurality of power generation devices for generating power and a power generation device controller for controlling the power generation devices, wherein the power generation device controllers of the plurality of power generation devices are communicably connected to each other via a communication line, the power generation device controller sets the power generation device to be controlled to one of a FULL operation mode in which the load is shared within the rated capacity range, a HALF operation mode in which the load is shared within half of the rated capacity range, an ECO operation mode in which the load is shared according to the fuel consumption efficiency, and a NOLOAD operation mode in which the load is not shared, collects information on the output state and the operation mode of the other power generation devices and the other power generation device controllers, and controls the output state of the power generation device. Power generation system.

2. When the plurality of power generation devices cannot output the power required for the load, the power generation device controllers of the plurality of power generation devices set the operation mode of the plurality of power generation devices to the FULL operation mode. The power generation system according to claim 1.

3. The power generation device controllers of the plurality of power generation devices calculate the fuel consumption efficiency of the plurality of power generation devices, and set the power generation device with the best fuel consumption efficiency or the plurality of power generation devices with good fuel consumption efficiency to the FULL operation mode. The power generation system according to claim 1.

4. The power generation device controller performs a failure diagnosis or a failure prediction diagnosis of the power generation device, and sets the power generation device diagnosed as having a failure or a failure prediction to the NOLOAD operation mode as a result of the failure diagnosis or the failure prediction diagnosis. The power generation system according to claim 1.

5. The power generation device controller automatically selects the operation mode according to the power generation device model or the device state input for the power generation device. The power generation system according to claim 1.

6. A power generation control method for a power generation system including a plurality of power generation devices for generating power and a power generation device controller for controlling the power generation devices, wherein the power generation device controllers of the plurality of power generation devices are communicably connected to each other via a communication line, the step of setting the power generation device controller to one of a FULL operation mode in which the load is shared within the rated capacity range, a HALF operation mode in which the load is shared within half of the rated capacity range, an ECO operation mode in which the load is shared according to the fuel consumption efficiency, and a NOLOAD operation mode in which the load is not shared; Steps of collecting information on the output states of another power generation device controller and another power generation device and the operation mode, and controlling the output state of the power generation device; A power generation control method comprising the above.

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