WO2017158669A1 - Power control apparatus, power source system, output control method, and recording medium - Google Patents

Abstract

This power source system is provided with: a first power system; a second power system; and a power control apparatus. The first power system has a first power generation apparatus provided with an engine, and is coupled to a power load through a current conducting path. The second power system has a power storage apparatus, and is connected to the current conducting path. The power control apparatus controls the first and second power systems. The power control apparatus has: a power generation control unit that controls the first power system; and a power control unit that controls the second power system. When the first power generation apparatus is to be started, the power control unit causes the second power system to output discharge power to the current conducting path by discharging power from the power storage apparatus.

Description

Power control apparatus, power supply system, output control method, and recording medium

The present invention relates to a power control device, a power supply system, an output control method, and a recording medium. In particular, the present invention relates to a technique suitable for a power supply system that operates a diesel power generation system and a charge / discharge system having a power storage device in cooperation with each other.

Conventionally, in off-grid areas such as island areas, a power supply system using a diesel generator that generates power by driving an engine or the like has been widely introduced as a power supply system. When diesel generators continue to operate at light loads and low output, diesel fuel and engine oil cause incomplete combustion. When incomplete combustion occurs, power generation efficiency decreases. Further, the fuel component that could not be burned remains in the combustion engine and / or the exhaust engine. In such a state, the operating state of the engine becomes unstable, and emissions such as NOx and black smoke component (fuel unburned component) in the exhaust gas increase or the engine stops (so-called engine stall). Such problems may occur.

For this reason, for example, in the power supply system of Patent Document 1, a simulated load whose power consumption can be freely changed is connected between a power generation device that drives a generator with an engine and a power load. Then, the power generation apparatus is maintained in a relatively high engine output state by constantly maintaining the power generated by the power generation apparatus at or above the lower limit power threshold that can stably drive the engine. As a result, even when the power consumption at the power load is small, the operating state of the engine is stabilized, and an increase in emissions in the exhaust gas and the occurrence of engine stall are suppressed. However, in this power supply system, it is necessary for the power generation device to generate power exceeding the power consumption at the power load due to the power consumption at the simulated load. Therefore, fuel is lost wastefully.

On the other hand, if the load on the power supply system increases and it is not possible to cover the load only with the generated power of the diesel generator that is generating at that time, it is necessary to start another diesel generator.

JP2015-109745A

However, since it takes time to start the diesel generator, the diesel generator that is already in operation is overloaded until the power generation of the started diesel generator is stabilized, and stops due to a decrease in output voltage. May end up. Such a problem is not mentioned in Patent Document 1.

In view of the above situation, an object of the present invention is to provide a technique capable of preventing the power generation system from being overloaded when the power generation device is started.

In order to achieve the above object, a power control apparatus according to an aspect of the present invention controls a first power system that includes a first power generation device including an engine and is connected to a power load via a current path. A power generation control unit, and a power control unit that controls the second power system that includes the power storage device and is connected to the energization path, the power control unit configured to store the power storage device when the first power generation device is started. And discharging electric power from the second electric power system to the energization path.

In order to achieve the above object, a power supply system according to an aspect of the present invention includes a first power system having a first power generation device including an engine and connected to a power load via an energization path; It is set as the structure provided with the 2nd electric power system which has an electrical storage apparatus and is connected to an electricity supply path, and said electric power control apparatus which controls a 1st electric power system and a 2nd electric power system.

In order to achieve the above object, a power control method according to an aspect of the present invention includes a first power system that includes a first power generation device including an engine and is connected to a power load via an energization path. And a step of controlling a second power system having a power storage device and connected to the energization path, wherein the step of controlling the second power system is performed when the first power generator is started. The power storage device is discharged to output discharge power from the second power system to the energization path.

In order to achieve the above object, a computer-readable recording medium according to one aspect of the present invention is configured to store a program that causes a computer to execute the above power control method.

Further features and advantages of the present invention will be further clarified by the embodiments described below.

According to the present invention, it is possible to provide a technique capable of preventing the power generation system from being overloaded when the power generation device is started.

It is a block diagram which shows the 1st structural example of a power supply system. It is a flowchart for demonstrating an example of the command process of the command value based on the detection result of an ammeter. It is a graph which shows the example of a setting of the maximum generated electric power. It is a graph which shows the other example of a setting of maximum generated electric power. It is a graph which shows the other example of a setting of maximum generated electric power. It is a graph which shows the other example of a setting of maximum generated electric power. It is a flowchart for demonstrating another example of the command process of the command value based on the detection result of an ammeter. It is a block diagram which shows the 2nd structural example of a power supply system. It is a flowchart for demonstrating an example of the command process of the command value based on the detection result of each ammeter. It is a block diagram which shows the modification of the 2nd structural example of a power supply system. It is a block diagram which shows the 3rd structural example of a power supply system. It is a block diagram which shows the other 3rd structural example of a power supply system. It is a block diagram which shows the 4th structural example of a power supply system. It is a block diagram which shows the 5th structural example of a power supply system. It is a block diagram which shows the 6th structural example of a power supply system. It is a graph which shows an example of the voltage characteristic of total output electric power, and the frequency characteristic of a voltage.

Hereinafter, a power control device, a power supply system, an output control method, and a recording medium according to an embodiment of the present invention will be described in detail with reference to the drawings. Note that in the drawings showing the block diagrams, a solid line indicates a power line, and a broken line indicates a signal line.

<First Embodiment>
FIG. 1 is a block diagram illustrating a first configuration example of the power supply system 100. The power supply system 100 is a power supply system that supplies power to the power load L. As shown in FIG. 1, the power supply system 100 includes a diesel power generation system DGS, an ammeter Mcs, a charge / discharge system BTS, and a controller 1. The diesel power generation system DGS, the charge / discharge system BTS, and the power load L are electrically connected to each other via a current path P and a distribution board (not shown). Note that the power load L is, for example, household appliances, factory equipment, and the like, and consumes power WL supplied from the power supply system 100. Hereinafter, the power WL that is supplied to and consumed by the power load L is referred to as power consumption WL.

The diesel power generation system DGS is a power system including a plurality of diesel generators DG1, DG2,..., DGn (n is a positive integer of 2 or more), and is a power generation system that functions as a backbone of the power supply system 100. When the diesel generator DG functions as a backbone, the power supply system 100 can appropriately maintain and adjust power quality such as frequency and voltage. Hereinafter, when the individual diesel generators DG1, DG2,..., DGn are collectively referred to without distinction, they are simply referred to as a diesel generator DG. The generated power Wg1, Wg2,..., Wgn output from the individual diesel generators DG are also referred to as generated power Wg. In FIG. 1, three diesel generators DG1, DG2, and DGn are illustrated. However, the present invention is not limited to this example, and there may be two or more diesel generators DG.

Each diesel generator DG is a generator that consumes fuel such as light oil and generates generated power Wg, and includes, for example, a generator (not shown) and an engine (not shown) that drives the generator. Composed. When the diesel generator DG is operated in a low output state, unburned gas is likely to be generated. When unburned gas is generated, oil that has not been burned from the exhaust pipe may drip or a large amount of black smoke may be generated. In order to prevent such a situation from occurring, it is preferable that the generated power Wg of the diesel generator DG is not too low relative to the rated generated power (that is, the maximum value of the generated power Wg). Therefore, the lower limit allowable generated power is set in the diesel generator DG. The lower limit allowable generated power is a lower power threshold of the generated power Wg that is set within a range that can effectively suppress or prevent the occurrence of an increase in emissions in exhaust gas and the occurrence of engine stall, etc. It is obtained by multiplying by the ratio. The predetermined ratio is not particularly limited, but is, for example, about 40 to 50%.

The ammeter Mcs is a detector that detects the current value Is of the electric power Ws output from the diesel power generation system DGS to the energization path P, and outputs detection information indicating the detection result to the controller 1. The ammeter Mcs is provided on the energization path P between the diesel power generation system DGS, the charge / discharge system BTS, and the power load L. Hereinafter, power Ws is referred to as total output power Ws. The total output power Ws in FIG. 1 is the sum Ws of each generated power Wg output from the diesel generator DG in operation. Moreover, below, the sum total of each lower limit allowable generated power of the diesel generator DG in operation is referred to as a lower limit allowable output power. That is, the lower limit allowable output power is a lower power threshold value of the total output power Ws set within a range in which the occurrence of an increase in emissions in exhaust gas and the occurrence of engine stall can be effectively suppressed or prevented.

The charge / discharge system BTS is an electric power system including the power storage device BT and the charge / discharge power conditioner 2. Hereinafter, the charge / discharge power conditioner 2 is referred to as a charge / discharge PCS (Power Conditioning System) 2.

The power storage device BT is an energy storage device that is charge / discharge controlled by the charge / discharge PCS 2 and has a charge / discharge function capable of repeated charging and discharging. For example, the power storage device BT can charge direct-current power supplied from the charge / discharge PCS2, and can discharge the discharged direct-current power to the charge / discharge PCS2 according to the amount of charge. Note that the configuration of the power storage device BT is not particularly limited. For example, power storage device BT may include a secondary battery such as a lithium secondary battery, a nickel hydrogen battery, a nickel cadmium battery, and a lead battery. Alternatively, the power storage device BT may include an electric double layer capacitor. Further, the number of power storage devices BT is not limited to the example shown in FIG. 1 and may be plural.

The charge / discharge PCS2 is a power control device that performs charge / discharge control of the power storage device BT based on the control information transmitted from the controller 1, and is provided between the energization path P and the power storage device BT. For example, the charge / discharge PCS 2 converts at least a part of the power flowing through the energization path P into DC power (so-called forward conversion) and supplies it to the power storage device BT. Further, the charge / discharge PCS 2 converts the DC power discharged from the power storage device BT into power (so-called reverse conversion) and outputs it to the energization path P. Hereinafter, the power Wa that is input / output to / from the energization path P by the charge / discharge PCS 2 is referred to as charge / discharge power Wa. Further, the positive value of the charge / discharge power Wa indicates the discharge power output from the charge / discharge PCS2 to the energization path P when the power storage device BT is discharged. The negative value of the charge / discharge power Wa indicates the charge power input to the charge / discharge PCS2 from the energization path P when the power storage device BT is charged. This charge / discharge power Wa is controlled based on a command value Ia, which will be described later, transmitted from the controller 1. Further, the charge / discharge PCS2 includes information related to power control (in particular, power conversion amount, power conversion direction, rated value of charge / discharge power Wa in forward conversion and reverse conversion, and the like), and state notification information transmitted from the power storage device BT. The information (for example, the storage capacity, the storage amount, the state of the charge / discharge operation) related to the power storage device BT based on is transmitted to the controller 1.

Next, the controller 1 is a power control device that controls a power system of the power supply system 100 (for example, a diesel power generation system DGS, a charge / discharge system BTS), and manages the power in the power supply system 100. As shown in FIG. 1, the controller 1 includes a display unit 11, an input unit 12, a communication unit 13, a storage unit 14, and a CPU 15.

The display unit 11 displays information about the power supply system 100 on a display (not shown). The input unit 12 receives a user input and outputs input information corresponding to the user input to the CPU 15. The communication unit 13 is a communication interface that performs wireless communication or wired communication with the diesel power generation system DGS (here, each diesel generator DG) and the charge / discharge PCS2.

The storage unit 14 is a storage medium that holds stored information non-temporarily without supplying power. The storage unit 14 stores various information used by each component (particularly the CPU 15) of the controller 1 and software programs.

The CPU 15 is a computer unit that controls each component of the controller 1 using control information, a program, and the like stored in the storage unit 14. The CPU 15 includes a power detection unit 151, a calculation unit 152, a timer 153, a power generation control unit 154, and a power control unit 155 as functional components.

The power detection unit 151 detects power in the power supply system 100 based on information transmitted from the diesel power generation system DGS, the ammeter Mcs, and the charge / discharge PCS2. For example, the power detection unit 151 detects the state of the diesel power generation system DGS (for example, the operating diesel generator DG, the number of the diesel power generators DG, and the rated power generation) based on information transmitted from the diesel power generation system DGS. Further, the power detection unit 151 can detect the total output power Ws based on the detection result of the ammeter Mcs and the Ws-Is characteristic. Moreover, the electric power detection part 151 detects the charging / discharging state of the electrical storage apparatus BT, charging / discharging electric power Wa of charging / discharging PCS2, etc. based on the information transmitted from charging / discharging PCS2. In addition, the power detection unit 151 can also detect the power consumption WL based on, for example, the total output power Ws and the charge / discharge power Wa. Alternatively, a detector (not shown) for detecting the power consumption WL may be provided on the energization path P between the power load L, the diesel power generation system DGS, and the charge / discharge system BTS. In this case, the power detection unit 151 can detect the power consumption WL based on the detection result of the detector.

The calculation unit 152 is a value setting unit that sets, calculates, and determines various parameters. For example, the calculation unit 152 determines the maximum generated power of the diesel generator DG that is generating power (including that being started) based on the information transmitted from the diesel power generation system DGS, the detection result of the power detection unit 151, and the like. WMg and the maximum output power WMs of the diesel power generation system DGS are calculated. The maximum generated power WMg is the maximum value WMg of the generated power Wg that is output from the starting diesel generator DG. A method for setting the maximum generated power WMg will be described later in detail (see FIGS. 3A to 3D described later). The maximum output power WMs is the maximum value WMs of the total output power Ws that is output from the diesel power generation system DGS. The sum total of the maximum generated power WMg set in the diesel generator DG during operation is the same value as the maximum output power WMs. Moreover, the calculation part 152 sets the command value Ia for commanding charging / discharging electric power Wa to charging / discharging system BTS.

The timer 153 is a timekeeping unit, which measures the current date and time (that is, the current date and time) or the elapsed time from a predetermined time to the current time.

The power generation control unit 154 controls the diesel power generation system DGS (and individual diesel generators DG). For example, the power generation control unit 154 determines a diesel generator DG to be operated (that is, power generation) based on the power consumption WL. Further, when the total output power Ws is equal to or greater than the maximum output power WMs, the power generation control unit 154 determines the diesel generator DG to be started from the stopped diesel generators DG and starts the operation. Note that the diesel generator DG to be started is determined so that the lower limit allowable output power is minimized within a range where the maximum output power WMs does not become less than the power consumption WL. In addition, the power generation control unit 154 discharges the power storage device BT from the charge / discharge system BT to the power supply path P when the power generation device (diesel generator DG in FIG. 1) of the diesel power generation system DGS is started. (> 0) is output.

The power control unit 155 controls the charge / discharge system BTS. Further, the power control unit 155 adjusts the charge / discharge power Wa based on the command value Ia. When the diesel generator DG is newly started, the power control unit 155 instructs the charge / discharge PCS2 of the charge / discharge system BTS with the command value Ia [A], discharges the power storage device BT, and based on the command value Ia The charge / discharge power Wa (> 0) is output from the charge / discharge PCS2 to the energization path P. Further, the power generation control unit 154 gradually reduces the charge / discharge power Wa (> 0) after a predetermined period has elapsed (that is, after the started diesel generator DG enters a stable operation state), Power is supplied from the power generation system DGS to the power load L. In addition, the power control unit 155 causes the power storage device BT to charge a part of the total generated power Ws when the SOC (State of Charge) of the power storage device BT is equal to or less than a predetermined threshold. This charging is performed so that the individual diesel generators DG are not overloaded.

Next, a process in which the controller 1 determines the command value Ia [A] and commands the charge / discharge PCS 2 will be described. FIG. 2 is a flowchart for explaining an example of the command processing of the command value Ia based on the detection result of the ammeter Mcs. The process of FIG. 2 is started when the power supply system 100 is started, and is ended when the operation of the power supply system 100 is stopped, for example. At the start of processing, the command value Ia is set to 0 [A].

First, the power generation control unit 154 detects the operating diesel generator DG (S101). The power detection unit 151 detects the total output power Ws of the diesel power generation system DGS (S102), and determines whether the total output power Ws is less than the maximum output power WMs (S103). When Ws <WMs is not satisfied (NO in S103), the calculation unit 152 adds a predetermined addition value ΔI1 to the command value Ia [A] in order to increase the charge / discharge power Wa (S104). Then, the process proceeds to S109 described later.

When Ws <WMs (YES in S103), the calculation unit 152 subtracts a predetermined subtraction value ΔI2 from the command value Ia in order to decrease the charge / discharge power Wa (S105). Note that ΔI2 may be the same value as ΔI1 or a value different from ΔI1. If ΔI2 = ΔI1, the calculation process of the command value Ia can be simplified. If ΔI2 ≠ ΔI1, the command value Ia can be set by a desired method. Then, the calculation unit 152 determines whether or not the command value Ia is less than 0 [A] (S106). If Ia <0 is not satisfied (NO in S106), the process proceeds to S108.

Further, when Ia <0 (YES in S106), a calculation unit 152 command is issued to prevent partial input of the total output power Ws from the current path P to the charge / discharge PCS2 (that is, charging to the power storage device BT). The value Ia is set to 0 [A] (S107). Then, the process proceeds to S108.

Next, the communication unit 13 transmits the command value Ia to the charge / discharge PCS2 (S108). The charge / discharge PCS2 performs power control of the charge / discharge power Wa based on the command value Ia. Then, the process returns to S101.

Next, a method for setting the maximum generated power WMg of the diesel generator DG newly started by the controller 1 will be described as an example. The maximum generated power WMg can be set in advance by the value input by the user to the controller 1 based on the actual operation and specifications of the diesel generator DG. Alternatively, the maximum generated power WMg may be set based on the setting information when the controller 1 receives the setting information of the parameters used for determining the maximum generated power WMg from the individual diesel generators DG. FIG. 3A is a graph showing a setting example of the maximum generated power WMg. 3B to 3D are graphs showing other setting examples of the maximum generated power WMg.

In the setting example of FIG. 3A, the maximum generated power WMg is set to 0 [kW] in a period (t1 ≦ t <t2) from the time t1 when the diesel generator DG is started to the time t2 when the predetermined first time has elapsed. Is done. And in the period (t2 <= t <= te) from the time t2 to the time te when the diesel generator DG stops, the maximum generated power WMg is set to a constant value.

In the setting example of FIG. 3B, the maximum generated power WMg = 0 [kW] is set in the period of t1 ≦ t <t2. In a period from time t2 to time t3 when a predetermined second time has elapsed (t2 ≦ t ≦ t3), the maximum generated power WMg gradually increases. Note that the maximum generated power WMg is linearly increased with respect to the operation time t in FIG. 3B. However, the present invention is not limited to this example, and the maximum generated power WMg may be increased nonlinearly with respect to the operation time t. And in the period (t3 <= t <= te) from the time t3 to the time te when the diesel generator DG stops, the maximum generated power WMg is set to a constant value.

In the setting example of FIG. 3C, the maximum generated power WMg gradually increases during a period (t1 ≦ t ≦ t4) from the time t1 to the time t4 when the predetermined third time has elapsed. Note that the maximum generated power WMg is linearly increased with respect to the operation time t in FIG. 3C. However, the present invention is not limited to this example, and the maximum generated power WMg may be increased nonlinearly with respect to the operation time t. And in the period (t4 <= t <= te) from the time t4 to the time te when the diesel generator DG stops, the maximum generated power WMg is set to a constant value.

3D, the maximum generated power WMg is set to a constant value during a period (t1 ≦ t ≦ te) from the time point t1 when the diesel generator DG starts to the time point te when the diesel generator DG stops.

<Modification of First Embodiment>
Next, the process in which the controller 1 determines the command value Ia and commands the charge / discharge PCS 2 is not limited to the example shown in FIG. When a new power generator (for example, a diesel generator DG) is started, the command value Ia may be set to a constant value. FIG. 4 is a flowchart for explaining another example of the command processing of the command value Ia based on the detection result of the ammeter Mcs. Note that the process of FIG. 4 is started when the diesel generator DG is newly started. Further, at the start of the process of FIG. 4, the command value Ia is set to 0 [A]. Further, the controller 1 receives from the diesel generator DG that starts parameter setting information used for determining the maximum generated power WMg. This parameter is, for example, the rated generated power (so-called power generation capacity) in the diesel generator DG to be started and the power generation characteristics at the time of start (such as an increase rate of the generated power Wg).

First, the power generation control unit 154 determines to start a new diesel generator DG based on the total output power Ws and the like (S201). The calculation unit 152 determines the discharge output period Tch of the command value Ia and the charge / discharge power Wa (> 0) based on the setting information (S202). At this time, the command value Ia is set to a constant value. The discharge output period Tch is a period in which the charging / discharging PCS2 outputs a constant value of charging / discharging power Wa based on the command value Ia to the energizing path P, starting from the time point t1 when the diesel generator DG starts. The communication unit 13 transmits the command value Ia determined by the calculation unit 152 to the charge / discharge PCS2 (S203). Then, the timer 153 starts measuring time related to the discharge output period Tch (S204).

Next, the timer 153 determines whether or not the discharge output period Tch has elapsed since the time measurement in S204 was started (S205). If the discharge output period Tch has not elapsed (NO in S205), the process returns to S201. When the discharge output period Tch has elapsed (YES in S205), the communication unit 13 transmits the command value Ia = 0 [A] set by the calculation unit 152 to the charge / discharge PCS2 (S206). Then, the charge / discharge PCS2 stops the output of the charge / discharge power Wa to the energization path P based on the command value Ia = 0, and the process ends.

According to the embodiment described above, the power control device 1 includes the first power generation device DG including an engine (not shown) and is connected to the power load L via the current path P. A power generation control unit 154 that controls the DGS, and a power control unit 155 that controls the second power system BTS that has the power storage device BT and is connected to the energization path P. The power control unit 155 includes the first power generation unit 155. When the device DG is started, the power storage device BT is discharged, and the discharge power Wa (> 0) is output from the second power system BTS to the conduction path P.

The power supply system 100 also includes a first power generation device DG including an engine (not shown) and a first power system DGS that is connected to the power load L via a current path P, and a power storage device BT. The second power system BT connected to the energization path P and the power control apparatus 1 that controls the first power system DGS and the second power system BTS are configured.

Further, the power control method includes a step of controlling a first power system DGS having a first power generation device DG including an engine (not shown) and connected to the power load L via the energization path P; And controlling the second power system BTS connected to the energization path P with the BT, and the step of controlling the second power system BTS is performed when the first power generator DG is started. The apparatus BT is discharged to include a step of outputting the discharge power Wa (> 0) from the second power system BTS to the energization path P.

Further, the power control apparatus 1 is configured to include a computer-readable recording medium 14 in which a program for causing the computer 15 to execute the above power control method is recorded non-temporarily.

According to these configurations, when the first power system DGS is linked with the second power system BT and the first power generation device DG including the engine (not shown) is started, the discharge power is discharged from the second power system BT. Wa (> 0) can be output and supplied to the power load L. Therefore, when the first power generator DG is started, the insufficient power can be supplemented with the discharge power Wa, and the first power system DGS can be prevented from being overloaded.

Furthermore, since it is sufficient that the power shortage when starting the first power generation device DG including the engine (not shown) can be discharged from the power storage device BT, the power storage device BT having a relatively small charge capacity can be installed. Therefore, the power storage device BT can be reduced in size.

Further, according to the present embodiment, there are a plurality of first power generation devices DG, and the power generation control unit 154 is configured to determine the first power generation device DG to be generated based on the power consumption WL of the power load L. .

According to this configuration, when the first power generation device DG is started, the first power system (particularly, the first power generation device DG that is already operating) can be prevented from being overloaded. In addition, it is possible to smoothly generate power with the plurality of first power generation devices DG, and the lower limit allowable output power of the first power system DGS can be lowered with a low cost and simple configuration. That is, the lower limit threshold value of the output power Ws that can be generated within a range that can effectively suppress or prevent the occurrence of problems in the first power generation device DG can be reduced.

Further, according to the present embodiment, the power control device 1 sets the maximum value WMg of the generated power Wg output from the first power generation device DG that is generating power, and calculates the sum WMs of the maximum value WMg. The power control unit 155 further includes an output power Ws output from the first power system DGS to the energization path P when the first power generation device DG is started. If the output power Ws is less than the total WMs, the discharge power Wa (> 0) is decreased.

According to this configuration, when the first power generator DG is started, the discharge power Wa (> 0) can be adjusted according to the output power Ws of the first power system DGS, and the first configuration can be achieved with a low cost and simple configuration. The load applied to the power system DGS can be adjusted. That is, if the output power Ws is less than the sum WMs of the maximum values WMg, the load on the first power system DGS can be increased by reducing the discharge power Wa (> 0) because there is a margin in the load. Further, if the output power Ws is equal to or greater than the sum WMs of the maximum value WMg, the discharge power Wa (> 0) can be increased to prevent overload, and the load on the first power system DGS can be reduced. Accordingly, it is possible to stabilize the power supply of the first power system DGS by causing the first power generation device DG to generate power within a range in which the occurrence of defects can be effectively suppressed or prevented.

Further, according to the present embodiment, the maximum value WMg is set to 0 from the first time point t1 when the first power generator DG is started to the second time point t2 after the first period, and is constant after the second time point t2. (See FIG. 3A). Further, the maximum value WMg is set to 0 from the first time point t1 when the first power generation device DG is started to the second time point t2 after the first period, and increases with time from the second time point t2 (FIG. 3B). Reference). Further, the maximum value WMg may be configured to increase with time from the first time point t1 when the first power generator DG is started (see FIG. 3C). The maximum value WMg may be configured to be a constant value (see FIG. 3D).

According to these configurations, the maximum value WMg of the generated power Wg can be arbitrarily set according to the actual operating environment of the first power system DGS.

Further, according to the present embodiment, the value setting unit 152 further sets the command value Ia for commanding the discharge power Wa (> 0) to the second power system BTS, and the power control unit 155 sets the command value Ia. The discharge power Wa is adjusted based on the above.

According to this configuration, the discharge power Wa can be adjusted by increasing or decreasing the command value Ia. For example, by reducing the command value Ia, the discharge power Wa (> 0) can be reduced and the load applied to the first power system DGS can be increased. Further, by increasing the command value Ia, the discharge power Wa (> 0) can be increased, and the load applied to the first power system DGS can be reduced.

Further, according to the present embodiment, the value setting unit 152 is further configured to set the command value Ia to 0 [A] if the command value Ia is less than 0.

According to this configuration, by not setting the command value Ia to a value less than 0, for example, when the power generation device (the first power generation device DG or the like) is started, the second power system BTS is at least one of the output power Ws. The power storage device BT can be prevented from being charged.

In addition, according to the present embodiment, the power control unit 155 is configured to output a constant discharge power Wa from the second power system BTS to the energization path P when the first power generation device DG is started.

According to this configuration, it is possible to adjust the load applied to the first power system DGS with a simple configuration. Accordingly, it is possible to stabilize the power supply of the first power system DGS by causing the first power generation device DG to generate power within a range in which the occurrence of defects can be effectively suppressed or prevented.

Second Embodiment
Next, a second embodiment will be described. In the second embodiment, each diesel generator DG is provided with an ammeter Mc. Hereinafter, a configuration different from the first embodiment will be described. Moreover, the same code | symbol is attached | subjected to the structure part similar to 1st Embodiment, and the description may be abbreviate | omitted.

FIG. 5 is a block diagram illustrating a second configuration example of the power supply system 100. In the power supply system 100 of FIG. 5, instead of the ammeter Mcs (see FIG. 1) for detecting the current value Is of the total output power Ws, the diesel power generation system DGS has ammeters Mc1, Mc2,. It is provided on each energization path connected to each power generator. In FIG. 5, ammeters Mc1, Mc2,..., Mcn are respectively provided on the first to nth conduction paths P1 to Pn (n is a positive integer of 2 or more) connected to each diesel generator DG. It has been. In the following, when the individual ammeters Mc1, Mc2,..., Mcn are collectively referred to without distinction, they are simply referred to as ammeters Mc. The currents Ig1, Ig2,..., Ign flowing through the current paths P1 to Pn are also called Ig. Each ammeter Mc is a detector that detects the current Ig of each generated power Wg of each diesel generator DG, and outputs detection information indicating the detection result to the controller 1. That is, the first ammeter Mcs1 detects the current value Ig1 of the generated power Wg1 of the diesel generator DG1 and its flow direction, and the second ammeter Mcs2 detects the current value Ig2 of the generated power Wg2 of the diesel generator DG2 and its flow direction. Is detected. The nth ammeter Mcn detects the current value Ign of the generated power Wgn of the diesel generator DGn.

Next, a process in which the controller 1 determines the command value Ia [A] and commands the charge / discharge PCS 2 will be described. FIG. 6 is a flowchart for explaining an example of command processing of the command value Ia based on the detection result of each ammeter Mc. The process of FIG. 6 is started when the power supply system 100 is started and ended when the operation of the power supply system 100 is stopped, for example. At the start of processing, the command value Ia is set to 0 [A].

First, the power generation control unit 154 detects the operating diesel generator DG (S101). The power detection unit 151 detects each generated power Wg of the diesel generator DG that is operating (power generation) (S302), and whether there is a diesel generator DG whose generated power Wg is less than the maximum generated power WMg. Is determined (S303). If there is no diesel generator DG that satisfies Wn <WMg (NO in S303), the process proceeds to S104 in order to increase the charge / discharge power Wa. On the other hand, if there is a diesel generator DG that satisfies Wn <WMg (YES in S306), the process proceeds to S105 in order to reduce the charge / discharge power Wa. Hereinafter, the processes in S104 to S108 are the same as those in FIG. Therefore, these explanations are omitted.

According to the embodiment described above, the power control device 1 further includes the value setting unit 152 that sets the maximum value WMg of the generated power Wg output from the first power generation device DG, and the power control unit 155 includes the first When the first power generation device DG is started, if there is a first power generation device DG whose generated power Wg is less than the maximum value WMg, the discharge power Wa (> 0) is decreased, and the generated power Wg is less than the maximum value WMg In the absence of the first power generation device DG, the discharge power Wa (> 0) is increased.

According to this configuration, when the first power generation device DG is started, the discharge power Wa (> 0) is adjusted depending on whether or not there is the first power generation device DG whose generated power Wg is less than the maximum value WMg. The load applied to the first power system DGS can be adjusted with a low cost and simple configuration. That is, if there is the first power generation device DG that satisfies Wg <WMg, the discharge power Wa (> 0) can be increased in order to prevent overload, and the load on the first power system DGS can be reduced. Further, if there is no first power generation device DG that satisfies Wg <WMg, the load on the first power system DGS can be increased by reducing the discharge power Wa (> 0) because there is a margin in the load. Accordingly, it is possible to stabilize the power supply of the first power system DGS by causing the first power generation device DG to generate power within a range in which the occurrence of defects can be effectively suppressed or prevented.

<Modification of Second Embodiment>
Next, in the above-described power supply system 100 (see FIG. 5), when there is a drive control device that directly drives and controls the diesel power generation system DGS (particularly, each diesel generator DG included in the system DGS), the controller 1 May control the diesel power generation system DGS via the drive control device. FIG. 7 is a block diagram illustrating a modification of the second configuration example of the power supply system 100. In the power supply system 100 of FIG. 7, a control panel 3 that drives and controls each diesel generator DG is provided separately from the controller 1. The control panel 3 is a drive control device that drives and controls each diesel generator DG based on control information transmitted from the controller 1. The power generation control unit 154 of the controller 1 controls the diesel power generation system DGS (and individual diesel generators DG) via the control panel 3.

According to the modification of the embodiment described above, the power supply system 100 further includes the drive control device 3 that performs drive control of the first power generation device DG, and the power control device 1 includes the first control device 3 via the drive control device 3. It is set as the structure which controls 1 electric power system DGS.

According to this configuration, even if the first power generation device DG has the existing drive control device 3, the first power system DGS can be controlled via the drive control device 3.

<Third Embodiment>
Next, a third embodiment will be described. In the third embodiment, a power generation system using renewable energy is connected to the power supply system 100. Below, a different structure from 1st or 2nd embodiment is demonstrated. Moreover, the same code | symbol is attached | subjected to the structure part similar to 1st or 2nd embodiment, and the description may be abbreviate | omitted.

FIG. 8 is a block diagram illustrating a third configuration example of the power supply system 100. As shown in FIG. 8, the power supply system 100 further includes a photovoltaic power generation system PVS. The solar power generation system PVS can supply, for example, the power Wb output to the energization path P to the power load L together with the total output power Ws. This solar power generation system PVS is connected to the energization path P between the diesel power generation system DGS and the charge / discharge system BTS and the power load L. Moreover, although the photovoltaic power generation system PVS is one in FIG. 8, it is not limited to this illustration, A plurality may be sufficient.

The solar power generation system PVS is an example of a power generation system that uses renewable energy, and is a power system that includes the solar cell string PV and the power conditioner 4 for power generation. Hereinafter, the power generation power conditioner 4 is referred to as a power generation PCS 4.

The solar cell string PV is a power generation device including one or a plurality of solar cell modules connected in series, and is connected to the power generation PCS 4. The solar cell string PV generates power by receiving sunlight, and outputs DC generated power Wp to the power generation PCS 4. The number of solar cell strings PV connected to the power generation PCS 4 is not limited to the example of FIG.

The power generation PCS 4 is a power control device that performs power control of the solar power generation system PVS based on the control information transmitted from the controller 1, and is provided between the energization path P and the solar cell string PV. The power generation PCS 4 controls the power generation of the solar cell string PV. In other words, the power generation PCS 4 normally controls the operating voltage (operating point) of the solar cell string PV so that the generated power Wp of the solar cell string PV becomes maximum, for example, by MPPT control.

Also, the power generation PCS 4 converts the generated power Wp of the solar cell string PV, and outputs the converted power Wb to the energization path P. Hereinafter, the power Wb output from the power generation PCS 4 to the energization path P is referred to as converted power Wb.

In addition, the solar power generation system PVS is connected to the power supply system 100 in which the ammeter Mcs is provided in the energization path P as in the first configuration example in FIG. However, the present invention is not limited to this example, and is connected to the power supply system 100 (see FIG. 5) in which an ammeter Mc is provided in each of the first to nth conduction paths P1 to Pn, as in the second configuration example. May be. Furthermore, the ammeter Mc may be provided between the energization path P and the charge / discharge PCS2. Further, in the power supply system 100, a power generation device that performs power generation using renewable energy other than sunlight (wind power, hydropower, geothermal, biomass, solar heat, natural energy power generation, waste power generation, etc.) is connected to the power generation PCS 4. A power generation system may be provided.

As shown in FIG. 8, the power supply system 100 having the photovoltaic power generation system PVS is particularly effective when, for example, the generated power Wp of the solar cell string PV suddenly decreases due to shading of sunlight or the like. This is because the decrease in the generated power Wp of the solar cell string PV can be compensated by the increase in the total value of the total output power Ws of the diesel power generation system DGS and the charge / discharge power Wa of the charge / discharge system BTS.

Moreover, in the power supply system 100 of FIG. 8, the solar cell string PV or the photovoltaic power generation system PVS can be easily added to increase the maximum value of the converted power Wb. Further, for example, the number of operating diesel generators DG is reduced, and the generated power Wg of the operating diesel generator DG is brought close to the lower limit allowable generated power, so that the converted power Wb is given priority from the photovoltaic power generation system PVS to the power load L. Can be supplied to. By operating in this way, fuel consumption in the diesel power generation system DGS can be reduced, so that power generation costs in the diesel power generation system DGS can be greatly reduced.

Furthermore, at this time, even when the total output power Ws is relatively low by installing a plurality of diesel generators DG having a relatively small power generation capacity in the diesel power generation system DGS, the individual diesel generators DG operate at a low load. Can be suppressed or prevented. For example, let us consider a case where generated power Wg is supplied to a power load L with power consumption WL = 140 [kW] from one diesel generator (for example, rated generated power 150 [kW]) having a relatively large power generation capacity. In this case, if the lower limit allowable power generation of the diesel generator is 40% (60 [kW]) of the power generation capacity, the photovoltaic power generation system PVS can operate the power load without causing the diesel generator to perform a low load operation. The maximum value of the converted power Wb that can be supplied to L is 80 [kW]. That is, the solar cell string PV or the solar power generation system PVS can be added only within a range where the power generation capacity is 80 [kW] or less. On the other hand, when a plurality of diesel generators DG (for example, rated power generation 50 [kW]) having a relatively small power generation capacity are installed as in the power supply system 100 of FIG. 8, the maximum value of the converted power Wb is set to 120 [kW]. Can be increased up to. That is, the solar cell string PV or the solar power generation system PVS can be added within a power generation capacity of 120 [kW] or less. When the converted power Wb of 120 [kW] is preferentially supplied from the photovoltaic power generation system PVS to the power load L, one diesel generator DG is operated with the lower limit allowable generated power (for example, 20 [kW]). The operation of the remaining diesel generator DG may be stopped. In this way, the lower limit allowable output power of the total output power Ws can be minimized without operating the diesel generator DG in a low load state.

In addition, when control is performed such that the charge / discharge power Wa (> 0) and the converted power Wb are always constant or smoothed, in a normal power supply system (for example, when only one diesel generator is installed), It is necessary to install a power storage device BT having a very large capacity. On the other hand, in the case of the power supply system 100 of FIG. 8, the power storage device BT may supply the charge / discharge power Wa necessary when starting each individual diesel generator DG. Therefore, the power storage device BT having a relatively small power storage capacity can be installed, and the power storage device BT can be downsized.

In the above description, the configuration in which the controller 1 does not communicate with the power generation PCS 4 is illustrated. However, the configuration is not limited to this example, and the power supply system 100 can communicate with the power generation PCS 4 even if the controller 1 can communicate with the power generation PCS 4. Good. FIG. 9 is a block diagram showing another third configuration example of the power supply system. In FIG. 9, the lower limit allowable power generation of the diesel power generation system DGS (that is, the smallest lower limit allowable power generation) is achieved by adopting a configuration in which the power generation PCS 4 has a function of suppressing output and can perform an output suppression instruction by communication. When the total output power Ws is lower than the lower limit allowable generated power of one first power generator DG having electric power), the power generation PCS 4 is instructed to suppress the output, and the output of the first power generator DG is lower than the lower limit. The output of the power generation PCS 4 is suppressed so that the capacity generation power is obtained. Thereby, it becomes possible to add the solar string PV more safely.

According to the embodiment described above, the power supply system 100 is configured to further include the third power system PVS that has the second power generation device PV and is connected to the power load L via the energization path P. .

According to this configuration, the third power generation system PVS can be easily added to the power supply system 100, for example, the number of operating first power generation devices DG is reduced and the generated power Wg of the first power generation device DG to be operated is allowed to be a lower limit. The converted power Wb can be preferentially supplied from the third power generation system PVS to the power load L close to the generated power. The lower limit allowable generated power is a lower power threshold value of the generated power Wg that is set within a range in which the occurrence of a malfunction in the first power generator DG can be effectively suppressed or prevented. By operating in this way, the cost (for example, fuel consumption) required for power generation in the first power system DGS can be reduced. Therefore, it is possible to greatly reduce the power generation cost in the first power system DGS.

Further, according to the present embodiment, in the power supply system 100, the second power generation device PV includes the power generation device PV using renewable energy.

According to this configuration, the third power generation system PVS can perform power generation using renewable energy.

<Fourth embodiment>
Next, a fourth embodiment will be described. In the fourth embodiment, a plurality of charge / discharge systems BTS are provided for each diesel generator DG. Hereinafter, a configuration different from the first to third embodiments will be described. The same components as those in the first to third embodiments are denoted by the same reference numerals, and the description thereof may be omitted.

FIG. 10 is a block diagram illustrating a fourth configuration example of the power supply system 100. In this power supply system 100, each diesel generator DG is provided with charge / discharge systems BTS1, BT2,..., BTSn (n is a positive integer of 2 or more). That is, the diesel generator DG1 is provided with a charge / discharge system BTS1 having a charge / discharge PCS2-1 and a power storage device BT1. The diesel generator DG2 includes a charge / discharge system BTS2 having a charge / discharge PCS2-2 and a power storage device BT2. The diesel generator DG is provided with a charge / discharge system BTSn having a charge / discharge PCS2-n and a power storage device BTn. Hereinafter, when the individual charge / discharge systems BTS1, BT2,..., BTSn are collectively referred to without distinction, they are simply referred to as charge / discharge systems BTS. The charge / discharge PCS 2-1, 2-2,..., 2-n and the power storage devices BT 1, BT 2,.

If the diesel power generation system DGS is configured in this way, the charge / discharge PCS2 and the power storage device BT having specifications suitable for each diesel generator DG can be connected to the diesel generator DG. Furthermore, the diesel generator DG, the charge / discharge PCS2, and the power storage device BT can be sold as a set.

In addition, the power supply system 100 does not include the solar power generation system PVS in FIG. However, this invention is not limited to this illustration, For example, the structure provided with one or more photovoltaic power generation systems PVS similar to FIG. 8 or FIG. 9 may be sufficient. Alternatively, a configuration including a power generation system in which a power generation device that generates power using renewable energy other than sunlight (wind power, hydropower, geothermal, biomass, solar power, natural energy power generation, waste power generation, etc.) is connected to the power generation PCS 4 It may be. In these cases, the charge / discharge system BTS may also be provided in a power generation system (including the solar power generation system PVS) that generates power using renewable energy.

According to the embodiment described above, the power supply system 100 includes a plurality of second power systems BTS and is provided for each first power generation device DG.

According to this configuration, the charge / discharge system BTS having specifications suitable for each first power generator DG can be connected to the first power generator DG. Further, the first power generator DG and the charge / discharge system BTS can be sold as a set.

<Fifth Embodiment>
Next, a fifth embodiment will be described. In the fifth embodiment, a plurality of charge / discharge systems BTS and drive control devices are provided for each diesel generator DG, and are unitized with the diesel generator DG. Hereinafter, configurations different from the first to fourth embodiments will be described. The same components as those in the first to fourth embodiments are denoted by the same reference numerals, and the description thereof may be omitted.

FIG. 11 is a block diagram illustrating a fifth configuration example of the power supply system 100. In the power supply system 100 of FIG. 11, the diesel power generation system DGS includes a plurality of diesel power generation units DU1, DU2,..., DUn (n is a positive integer of 2 or more). In the following, when the individual diesel power generation units DU1, DU2,..., DUn are collectively referred to without distinction, they are simply referred to as a diesel power generation unit DU.

Each diesel power generation unit DU includes a diesel generator DG, a charge / discharge system BTS, and a control panel 3. Each charge / discharge system BTS includes a power storage device BT and a charge / discharge PCS 2 that performs charge / discharge control of the power storage device BT. Each control panel 3 performs drive control of the diesel generator DG and power control of the charge / discharge PCS2. Further, the power generation control unit 154 of the controller 1 controls the diesel generator DG and the charge / discharge PCS2 via the control panel 3 for each diesel power generation unit DU.

When the diesel power generation system DGS is configured in this way, if the start command is transmitted to each control panel 3, the generated power Wg and the charge / discharge power Wa (> 0) are output to the current path P during the start of the diesel generator DG. it can. Then, the generated power Wg can be output to the energization path P after the start is completed. Also, such power output switching can be performed automatically. Furthermore, the diesel power generation unit DU can be incorporated into the diesel power generation system DGS on a unit basis, and the same controller 1 can be used before and after the assembly.

In addition, the power supply system 100 does not include the solar power generation system PVS in FIG. However, this invention is not limited to this illustration, For example, the structure provided with one or more photovoltaic power generation systems PVS similarly to FIG. 8 or FIG. 9 may be sufficient. Alternatively, a configuration including a power generation system in which a power generation device that generates power using renewable energy other than sunlight (wind power, hydropower, geothermal, biomass, solar power, natural energy power generation, waste power generation, etc.) is connected to the power generation PCS 4 It may be. In these cases, even in a power generation system (including the solar power generation system PVS) that generates power using renewable energy, the charge / discharge system BTS and the drive control device are provided, and these are unitized together with the power generation system. It may be.

According to the fifth embodiment described above, the power supply system 100 is configured such that the first power generation device DG and the second power system BTS are unitized in each first power generation device DG. Further, in each first power generation device DG, the drive control device 3 that performs drive control of the first power generation device DG is further configured as a unit.

According to these configurations, if the start command for the first power generator DG is transmitted to each drive control device 3, the generated power Wg can be output to the energization path P and the second power can be output during the start of the first power generator DG. The electric power Wa (> 0) can be output from the system BTS to the energization path P. Then, the generated power Wg can be output to the energization path P after the start is completed. Also, such power output switching can be automatically performed. Further, the unitized first power generation device DG and second power system BTS (and drive control device 3) can be incorporated into the first power system DGS in units of units, and the same power control device 1 can be installed before and after installation. Can be used.

<Sixth Embodiment>
Next, a sixth embodiment will be described. In the sixth embodiment, a voltmeter Mvs is provided on the energization path P instead of the ammeter Mcs. Hereinafter, configurations different from the first to fifth embodiments will be described. In addition, the same components as those in the first to fifth embodiments are denoted by the same reference numerals, and the description thereof may be omitted.

FIG. 12 is a block diagram illustrating a sixth configuration example of the power supply system 100. The power system 100 of FIG. 12 includes a voltmeter Mvs in addition to the diesel power generation system DGS, the power storage device BT, the controller 1 and the charge / discharge power conditioner 2.

The voltmeter Mvs is a voltage detector that detects the voltage value Vs of the total output power Ws and the voltage frequency fs, and transmits the detection result to the controller 1.

The power detection unit 151 detects the voltage value Vs and the voltage frequency fs of the total output power Ws based on the detection result, and further, based on the detection result, the voltage characteristic of the total output power Ws, and the frequency characteristic of the voltage value Vs. The total output power Ws is detected. FIG. 13 is a graph showing an example of the voltage characteristic of the total output power Ws and the frequency characteristic of the voltage. In FIG. 13, the voltage value Vs and the frequency fs of the total output power Ws are larger as the total output voltage Ws is smaller, and are smaller as the total output voltage Ws is larger. Information regarding these characteristics is stored in the storage unit 14, for example.

Further, the power generation control unit 154 controls the diesel power generation system DGS using the total output power Ws detected by the power detection unit 151. Alternatively, the power generation control unit 154 may control the diesel power generation system DGS using at least one of the voltage value Vs of the total output power Ws detected by the power detection unit 151 and the frequency fs of the voltage. In this case, if at least one of the actually detected voltage value Vs and the voltage frequency fs is less than the at least one value corresponding to the maximum output power WMs calculated by the calculation unit 152, the power generation control unit 154 Starts a new diesel generator DG and outputs charge / discharge power Wa (> 0) from the charge / discharge system BTS during the start-up.

In this way, the power control of the diesel power generation system DGS can be performed based on the detection result of the voltmeter Mvs.

Note that the voltmeter Mvs is provided in the energization path P between the diesel power generation system DGS, the charge / discharge system BTS, and the power load L in FIG. However, the present invention is not limited to this example, and voltmeters Mv1 to Mvn (n is a positive integer greater than or equal to 2) may be provided in each of the first to nth energization paths P1 to Pn. In this case, the power detection unit 151 detects the voltage values Vg1 to Vgn and the voltage frequencies fg1 to fgn of the generated power Wg of the individual diesel generators DG based on the detection results of the voltmeters Mv1 to Mvn, Each generated power Wg is detected based on the detection result and the voltage characteristics and voltage frequency characteristics (not shown) of each generated power Wg.

Further, the power supply system 100 does not include the solar power generation system PVS in FIG. However, the present invention is not limited to this example, and may be one or more configurations including the photovoltaic power generation system PVS as in FIG. 8 or FIG. Alternatively, a configuration including a power generation system in which a power generation device that generates power using renewable energy other than sunlight (wind power, hydropower, geothermal, biomass, solar power, natural energy power generation, waste power generation, etc.) is connected to the power generation PCS 4 It may be. Furthermore, a voltmeter may be provided between the current path P and the power generation system.

According to the embodiment described above, the power supply system 100 detects the voltage value Vs (or Vg1 to Vgn) or the voltage frequency fs (or fg1 to fgn) of the power Ws (or Wg1 to Wgn) flowing through the energization path P. Voltage controller Mvs (or Mv1 to Mvn), and the power control apparatus 1 includes power Ws (or Wg1 to Wgn) flowing through the energization path P based on the detection result of the voltage detector Mvs (or Mv1 to Mvn). It is set as the structure which detects.

According to this configuration, the power control of the first power system DGS can be performed based on the detection result of the voltage detector Mvs (or Mv1 to Mvn).

<Others>
The configuration of each embodiment described above is merely an example of the present invention. The configuration of each embodiment may be changed as appropriate without departing from the technical idea of the present invention. Each embodiment and the fine modification in embodiment can also be implemented combining in the possible range.

For example, in the first to sixth embodiments described above, the power supply system 100 is provided with a plurality of diesel generators DG, but the present invention is not limited to this example. The present invention is also applicable to the power supply system 100 provided with one diesel generator DG.

For example, in the first to fifth embodiments described above, a watt hour meter may be installed instead of the ammeter Mcs or Mc. In this way, it is possible to directly detect the total output power Ws or each generated power Wg of each diesel generator DG (and the converted power Wb of the photovoltaic power generation system PVS).

In the first to sixth embodiments described above, at least some or all of the functional components 151 to 155 of the CPU 15 are realized by physical components (for example, electric circuits, elements, devices, etc.). May be.

DESCRIPTION OF SYMBOLS 100 Power supply system 1 Controller 11 Display part 12 Input part 13 Communication part 14 Memory | storage part 15 CPU
151 Power detection unit 152 Calculation unit 153 Timer 154 Power generation control unit 155 Power control unit 2, 2-1 to 2-n Charge / discharge power conditioner 3, 3-1 to 3-n Control panel 4 Power conditioner for power generation DGS Diesel Power generation system DG1 to DGn, DG Diesel generator DU1 to DUn, DU Diesel power generation unit BTS, BTS1 to BTSn Charge / discharge system BT, BT1 to BTn Power storage device PVS Photovoltaic power generation system PV PV cell string Mcs, Mc1 to Mcn, Mc Current Meter Mvs Voltmeter L Power load

Claims (21)

1. A power generation control unit that controls a first power system having a first power generation device including an engine and connected to a power load via an energization path;
   A power control unit for controlling a second power system having a power storage device and connected to the energization path;
   With
   The power control unit is a power control device that discharges the power storage device and outputs discharge power from the second power system to the energization path when the first power generation device is started.
2. The first power generator is plural,
   The power control device according to claim 1, wherein the power generation control unit determines the first power generation device to generate power based on power consumption of the power load.
3. A value setting unit configured to set a maximum value of the generated power output from the first power generation device and calculate a sum of the maximum values;
   The power control unit increases the discharge power when output power output from the first power system to the energization path is equal to or greater than the sum of the maximum values when the first power generator is started. The power control apparatus according to claim 1, wherein the discharge power is decreased when the output power is less than the total sum.
4. A value setting unit for setting a maximum value of the generated power output from the first power generator;
   When the first power generation device is started, the power control unit reduces the discharge power when there is the first power generation device in which the generated power is less than the maximum value. The power control device according to claim 1 or 2, wherein the discharge power is increased when there is no first power generation device that is less than a maximum value.
5. The maximum value is 0 from a first time point when the first power generator is started to a second time point after the first period, and is a constant value after the second time point. The power control apparatus described.
6. The maximum value is set to 0 from a first time point when the first power generator is started to a second time point after the first period, and is increased with time from the second time point. The power control apparatus described.
7. The power control device according to claim 3 or 4, wherein the maximum value is increased with time from a first time point when the first power generator is started.
8. The power control device according to claim 3 or 4, wherein the maximum value is a constant value.
9. The value setting unit further sets a command value for commanding the discharge power to the second power system,
   The power control apparatus according to any one of claims 1 to 8, wherein the power control unit adjusts the discharge power based on the command value.
10. The power control device according to claim 9, wherein the value setting unit further sets the command value to 0 if the command value is less than 0.
11. The power control device according to claim 1 or 2, wherein the power control unit outputs a constant discharge power from the second power system to the energization path when the first power generation device is started.
12. A first power system having a first power generator with an engine and connected to a power load via an energization path;
    A second power system having a power storage device and connected to the energization path;
    The power control apparatus according to any one of claims 1 to 11, which controls the first power system and the second power system;
    Power supply system comprising.
13. A drive control device that performs drive control of the first power generation device;
    The power system according to claim 12, wherein the power control device controls the first power system via the drive control device.
14. The power supply system according to claim 12 or 13, further comprising a third power system having a second power generation device and connected to a power load via the energization path.
15. The power control device according to claim 14, wherein the second power generation device includes a power generation device using renewable energy.
16. The power supply system according to any one of claims 12 to 15, wherein a plurality of the second power systems are provided for each of the first power generation devices.
17. The power supply system according to claim 16, wherein the first power generation device and the second power system are unitized in each of the first power generation devices.
18. The power supply system according to claim 17, wherein a drive control device that performs drive control of the first power generation device is further unitized in each of the first power generation devices.
19. A voltage detector for detecting a voltage value or a voltage frequency of power flowing through the energization path;
    The power supply system according to any one of claims 12 to 18, wherein the power control device detects power flowing through the energization path based on a detection result of the voltage detector.
20. Controlling a first power system having a first power generator with an engine and connected to a power load via an energization path;
    Controlling a second power system having a power storage device and connected to the energization path;
    With
    The step of controlling the second power system includes a step of discharging the power storage device and outputting discharge power from the second power system to the energization path when the first power generator is started. Method.
21. A computer-readable recording medium in which a program for causing a computer to execute the power control method according to claim 20 is stored non-temporarily.

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