JP4473631B2 - Private power generator - Google Patents

Description

The present invention relates to a technique for a private power generator.
More specifically, the present invention relates to a configuration of a control device that controls a private power generator.

2. Description of the Related Art Conventionally, an in-house power generator including a drive source such as an engine, a generator, and a control device (control panel) for controlling these in a housing called a package has been known.
Such private power generators are known to cover the demand power of the load by switching between commercial power and generated power (power obtained by driving the generator with a drive source) as necessary. It has been.
Also known is a cogeneration system that is equipped with a heat exchanger, water supply pipes, etc. in a private power generator, and that uses hot heat generated from the drive source to raise the temperature of the water and supply hot water. ing. For example, as described in Patent Document 1.

  In addition, various state monitoring terminals (sensors, etc.) were provided, and the operation of the engine etc. constituting the private power generator was controlled based on data (signals) acquired from the state monitoring terminals, and some abnormality occurred. There is also known a private power generator that can be stopped without the operator's hand when the control device determines. For example, as described in Patent Document 2.

JP 2002-242759 A JP 2002-70606 A

The number of state monitoring terminals provided in the private power generator is large, and the number of wires connecting the state monitoring terminal and the control device is also large. Therefore, there is a problem that a wiring connection error is likely to occur during connection work, and workability during assembly is not good.
In addition, when the state monitoring terminal expresses the detected data as a weak current level, such as a temperature sensor, the signal of the detection data becomes small due to resistance of the wiring itself, disturbance, etc. when the wiring to the control device becomes long. At the same time, there is a problem that the influence of noise becomes large.

  In view of the situation as described above, the present invention makes it possible to reduce the wiring of the state monitoring terminal, improve the workability at the time of assembly, and minimize the influence of noise on the state monitoring terminal. It is intended to provide a private power generation device with improved accuracy of data from.

  The problem to be solved by the present invention is as described above. Next, means for solving the problem will be described.

In Claim 1, the generator board which controls the generated electric power generated when an engine drives a generator, the auxiliary board which controls an auxiliary actuator, and the terminal board which controls a state monitoring terminal, , The generator board and the terminal board are connected by CAN communication, the terminal board is divided and arranged in the vicinity of each monitoring target, and the auxiliary board is an inverter for driving an auxiliary actuator that is motor driven It is configured to control, has a control program related to different types of predetermined engines, controls the engine using a control program corresponding to the engine provided in the private power generator, and has a pair of conflicting operation functions, A touch panel is provided on the generator panel to be displayed separately from the top and bottom or left and right of the screen with the operation target in between. The data concerning the situation can be displayed, the connection to the terminal block is selected, and the touch panel can be used properly according to the specifications .

According to a second aspect of the present invention, the display surface of the touch panel is inclined with respect to the surface of the generator panel.

According to a third aspect of the present invention, data related to a failure history can be displayed on the display surface of the touch panel.

According to a fourth aspect of the present invention, a waterproof alarm means is provided at the opening of the box constituting the generator panel .

In Claim 5 , the box which comprises the said generator panel is provided with the external display means of the disaster prevention specification.

According to a sixth aspect of the present invention, the private power generator is provided with an AC power circuit breaker and a disconnection detecting means for cold district specifications.

According to a seventh aspect of the present invention, in the private power generator , it is possible to acquire data relating to the amount of fuel used by the engine, the amount of hot water obtained by utilizing exhaust heat, and the temperature of the hot water, and the acquired data and the engine The fuel consumption can be calculated based on the data relating to the generated power generated by driving the generator.

  As effects of the present invention, the following effects can be obtained.

According to the first aspect, it is possible to reduce the wiring related to the state monitoring terminal inside the private power generator to save space and facilitate the wiring connection work.
In addition, the generator panel can send and receive a large amount of data to and from the terminal panel in real time, and the engine, generator, other auxiliary actuators, etc. can be operated under desired conditions according to the power demand of the external load. And can be stopped.
Furthermore, by placing the terminal board near the monitoring target, it is possible to shorten the section connected by the conventional wiring and replace that with a CAN communication cable, amplifying the data signal halfway. Therefore, long-distance data transfer is possible and data transmission reliability is high.

In addition , it is not necessary to prepare a different generator panel for each specification, so that the workability at the time of assembly is excellent, and it is possible to reduce the cost by sharing the parts.

In Claim 2 , the visibility and operativity of a touch panel improve.

In Claim 3 , the cause of failure of the private power generator can be easily grasped, and the workability is excellent.

According to the fourth aspect , the alarm sound of the alarm bell can be heard from the outside, and when the private power generator is installed outdoors, the alarm bell does not break down even if rainwater or the like enters from the open part.

According to the fifth aspect of the present invention, it is not necessary to prepare a different generator panel for each specification, and it is possible to share parts, which contributes to cost reduction.

According to the sixth aspect, it is not necessary to prepare a different generator panel for each specification, and it is possible to share parts, which contributes to cost reduction.

In claim 7 , it is easy to grasp the cost merit (how much the power cost is reduced as compared with the case where only commercial power is supplied to the external load).

  Below, the whole structure of the private generator 1 which is one Embodiment of the private generator concerning this invention is demonstrated using FIG.

The “in-house power generator” in the present specification is not limited to the in-house power generator 1 of the present embodiment, and includes a drive source (engine) and a generator. The generator is driven by the drive source to generate electric power ( The term "generator power" is widely used to refer to power that can be supplied to an external load.
In addition, a cogeneration device that can supply hot water using exhaust heat generated from a drive source is also included in the private power generation device.

  The private power generator 1 is mainly composed of a package 2, an engine 3, a generator 4, a generator panel 5, an engine panel 6, an auxiliary panel 7, a terminal panel 8, a DC power panel 9, and the like.

The package 2 is a substantially rectangular parallelepiped housing that accommodates other members constituting the private power generator 1. The package 2 also serves as a function of protecting other members of the private power generator 1 from wind and rain when installed outdoors, and a function of blocking the operation sound of the engine 3 provided therein (soundproof function). .
The engine 3 is a drive source for driving the generator 4, and specifically comprises an engine such as a gas engine or a diesel engine. A pipe for supplying fuel and a valve group for supplying and stopping the fuel are connected to the engine 3.

  The generator 4 is a three-phase AC generator in this embodiment. When the private power generator 1 is used in a grid-connected system that covers the demand power of the load by switching between commercial power and generated power as necessary, the power (generated power) generated by the generator 4 is Supplied to the external load via the interconnection panel and power receiving panel.

The generator panel 5 not only controls the generator 4 but also the panel related to the engine 3 and other components constituting the private power generator 1 (in this embodiment, the engine panel 6, the auxiliary panel 7, and the terminal). The operation control of the entire private power generator 1 is performed in conjunction with the panel 8).
The generator panel 5 mainly includes a box 11, a generator controller (GCU) 12, a collective protective relay 13, a telecommunication unit 14, a touch panel 15, and the like.

  The box 11 is a housing that houses other members that constitute the generator panel 5. The box 11 is provided on one side surface of the package 2.

Specifically, the GCU 12 includes a CPU, a sequencer, a memory, and the like, and stores a program group and a data group related to the operation of the generator 4 and the private power generator 1.
At this time, the GCU 12 may be provided not only for the control program and control data related to the engine 3 currently provided in the private power generator 1, but also when the engine 3 is of a different type and has different specifications. A control program and control data relating to a certain thing (that is, a predetermined thing) are also stored in the memory.
And when carrying out operation control of the private generator 1, the control program and control data corresponding to the engine 3 provided are used.
With this configuration, it is not necessary to prepare a different generator panel for each specification, and the workability at the time of assembling is excellent, and the cost can be reduced by sharing parts.

The collective protection relay 13 also functions as an overspeed relay, a rated speed relay, an underspeed relay, etc., and the frequency of the alternating current output from the generator 4 from the residual magnetic voltage of the generator (in other words, the generator The number of rotations) is measured. The GCU 12 and the collective protection relay 13 are connected by wiring, and data relating to the frequency of the alternating current measured by the collective protection relay 13 is transmitted to the GCU 12 as binary data.
The GCU 12 adjusts the frequency when supplying power to the external load based on the data related to the frequency of the alternating current output from the generator 4 (that is, adjusts the rotation speed of the engine 3 in conjunction with the engine panel 6). To do).

The telecommunication unit 14 sends data related to the operation status of the private power generator 1 including various data transmitted to the GCU 12 to the outside (for example, a monitoring personal computer provided in a remote place) via the telecommunication line 14a. The GCU 12 can receive a command from the outside. Here, specific examples of the telecommunication line include a telephone line and an internet line.
The telecommunications unit 14 is usually equipped with a modem. However, when a plurality of private power generators 1 are used in conjunction with each other, the telecommunications unit 14 of each private power generator 1 is connected by a telecommunications line. It is possible to connect and provide a modem only in one of the telecommunication units 14 of the plurality of private power generators 1 and omit the modem of the telecommunication unit 14 for the other private power generators 1.

  The touch panel 15 is a means for displaying data related to the operation status of the private generator 1 and an operation means for performing the operation of the private generator 1. The touch panel 15 is provided in front of the box body 11 and can be operated without an operator opening the door provided on the package 2 or the box body 11.

As shown in FIGS. 2 and 3, a depression 11 a is formed in the front of the box 11, and the display surface 15 a of the touch panel 15 provided in the depression 11 a is arranged so that the upper end of the display surface 15 a is in front of the touch panel 15. When viewed from the standing worker, with respect to the surface of the generator panel 5 (one side surface of the box 11) so that the lower side of the display surface 15a is the front side when viewed from the worker standing in front of the touch panel 15. Is inclined.
The touch panel 15 has a position where the center height of the display surface 15a is about 120 cm from the bottom surface of the package 2 of the private generator 1 (that is, the direction of the line of sight is horizontal when the operator stands in front of the touch panel 15). It is disposed at a position that allows the operator to operate the touch panel 15 in an easy posture without tilting the hand slightly upward and without having to raise the hand for operating the touch panel 15 greatly upward.
By comprising in this way, the visibility and operativity of the touch panel 15 improve.

Further, as shown in FIG. 4, an increase button 16 a and a decrease button 16 b for governor adjustment, a start button 17 a and a stop button 17 b for the engine 3, a radiator fan operation button 18 a and a stop button 18 b, etc. are displayed on the display surface 15 a of the touch panel 15. In addition, a pair of conflicting operation functions are arranged on the left and right sides of the display surface 15a across the operation target, and the stop or decrease side and the start or increase side are respectively arranged on the same left and right side.
With this configuration, it is possible to prevent an operator from operating an incorrect function button, and the workability is excellent.
In the present embodiment, the pair of opposing function buttons are arranged on the left and right sides of the display surface 15a with the operation target interposed therebetween, but may be arranged on the upper and lower sides of the display surface 15a.

Furthermore, the touch panel 15 can display information related to the operation status and alarm (failure) of the private power generator 1 on the display surface 15a.
By configuring in this way, it is possible to omit a lamp that indicates a driving situation or a warning that is conventionally provided on the front face of the generator panel 6 or the like.

Further, the touch panel 15 can display a history of failure contents (time-series data related to the failure contents) of the private power generation apparatus 1 detected by a situation monitoring terminal described later (more specifically, on the display surface 15a). The failure history is displayed on the display surface 15a by pressing the failure history call button 19 which is one of the function buttons displayed on the display surface 15a).
By configuring in this way, the operator can easily grasp the cause of the failure even when a failure occurs in the private power generator 1, and the workability is excellent.

Furthermore, the private power generation device 1 of the present embodiment enables the same touch panel 15 to be used with different specifications such as waterproof specifications, cold district specifications, disaster prevention combined use specifications, and the like.
Specifically, the display of the touch panel 15 and the selection of the part to detect the touched part can be controlled by changing the program of the GCU 12, but the waterproof specification is selected by selecting the terminal connected to the terminal block 26 connected to the GCU 12. And cold area specifications, disaster prevention combined use specifications, etc. That is, the terminal block 26 of the touch panel 15 is provided with all the terminals necessary for each specification of the private power generator 1, and the terminals corresponding to functions not used when a certain specification is used are left without wiring. .
For example, in the disaster prevention specification, it is necessary to display the fact on the touch panel 15 when commercial power is interrupted, so the undervoltage contact of the system and the corresponding contact provided on the terminal block 26 of the touch panel 15 are wired. However, in other specifications, such a function is not necessary, so the wiring is left unconnected.
In addition, as for the functions of the touch panel 15 (display screen pattern, etc.), all the functions necessary for the specifications to which the touch panel 15 can be applied are provided in advance. It is configured to be possible.
In this way, by selecting the connection to the terminal block 26 and making the touch panel 15 properly usable according to the specification, it is not necessary to prepare a different touch panel 15 for each specification, and it is possible to share components. And contribute to cost reduction. In addition, it is possible to prevent mistakes such as assembling touch panels having different specifications during assembly work, and the workability is excellent.

The engine panel 6 includes a CPU, a ROM, and the like, and stores programs and data related to operation control of the engine 3. The engine panel 6 controls the operation of the engine 3 in conjunction with the generator panel 5.
In this embodiment, the generator panel 5 and the engine panel 6 are separated, but the generator panel 5 stores a program and data related to operation control of the engine 3, and the engine panel 6 is omitted. It is also possible.

The auxiliary machine panel 7 includes various auxiliary actuators (for example, a radiator fan for the cooling water of the engine 3, a pump for circulating the cooling water of the engine 3, a ventilation fan of the private power generation apparatus 1). Lighting etc.).
The auxiliary machine board 7 and the generator board 5 (more precisely, the GCU 12) are connected by wiring, and data relating to the auxiliary actuator controlled by the auxiliary machine board 7 is transmitted to the GCU 12 as binary data. The auxiliary board 7 is provided with an inverter, and an auxiliary actuator driven by the motor is controlled by the inverter. With this configuration, the operation of the auxiliary actuator can be controlled smoothly.

The terminal board 8 is connected to the wiring of the state monitoring terminal of the private power generator 1. The terminal board 8 converts the detection signal from the state monitoring terminal into data for CAN communication, and transmits the data to the GCU 12 of the generator board 5 and the engine board 6 via the internal CAN communication cable 20. Details of the CAN communication will be described later.
Specific examples of the state monitoring terminal include a temperature sensor 31 that monitors the coolant temperature of the engine 3, a rotation speed sensor 32 that detects the rotation speed of the engine 3, a flow rate sensor (not shown) that detects the flow rate of fuel, A temperature sensor (not shown) for measuring the temperature of hot water provided when the private power generator 1 is a cogeneration device, a flow rate sensor (not shown) for detecting the flow rate of hot water, and the like can be mentioned.
It is desirable that the terminal board 8 is divided and arranged as appropriate in the vicinity of the place where the state monitoring terminal is arranged so that the distance between the terminal board 8 and the state monitoring terminal is as small as possible.

  The DC power supply panel 9 includes a charger and a battery. The DC power supply panel 9 charges part of the electric power generated by the generator 4 to the battery and supplies electric power for starting the engine 3.

  Below, the connection wiring between the generator panel 5, the engine panel 6, and the terminal panel 8 in the private power generator 1 of the present embodiment, and the connection wiring between the generator panel 5 and the outside of the private power generator 1 Will be described.

The private power generator 1 of the present embodiment includes another private power generator 1 between the internal power generator panel 5, the engine panel 6, and the terminal panel 8 and when power is generated using a plurality of private power generators 1. CAN communication is used as a data communication means between and.
That is, as shown in FIG. 1, the generator panel 5, the engine panel 6, and the terminal panel 8 are connected by the internal CAN communication cable 20.

Moreover, it connects with the exterior of the private generator 1 with the external CAN communication cable 21, and is comprised so that data communication can be performed by CAN communication.
Here, “external” refers to a personal computer installed in a location where the private power generation device 1 is installed, such as a monitoring monitor room, or a private power generation device 1. This refers to another private power generator 1 when a plurality of units are installed and used in conjunction with each other.

CAN (Controller Area Network) is a type of communication protocol internationally standardized by ISO,
(1) Since a serial bus is used as a communication cable (CAN communication cable), a large amount of data can be transmitted with less wiring (wiring can be reduced, weight and cost can be reduced),
(2) Easy wiring (simple) and high data transmission reliability
(3) A large amount of data can be transmitted in real time, and it is suitable for applications in which a large amount of data is exchanged between systems while performing linkage work.
(4) It is not necessary to amplify a data signal and is suitable for long-distance data transfer.

  As described above, the private power generator 1 of the present embodiment includes the generator panel 5 that controls the power, the auxiliary panel 7 that controls the auxiliary actuator, and the terminal panel 8 that controls the state monitoring terminal. The generator panel 5 and the terminal panel 8 are connected by CAN communication, and the terminal panel 8 is divided and arranged in the vicinity of each monitoring target (the engine 3, the generator 4, etc.). The auxiliary actuator to be driven is configured to be controlled by an inverter.

By comprising in this way, it is possible to reduce the wiring which concerns on the state monitoring terminal inside the private generator 1 and to save space and facilitate wiring connection work.
In addition, the generator panel 5 can transmit and receive a large amount of data (data relating to the operation status of the private power generator 1) in real time with the engine panel 6, the auxiliary machine panel 7, the terminal panel 8, and the like. The engine 3, the generator 4, other auxiliary actuators, and the like can be operated and stopped under desired conditions according to the power demand of the external load.
Furthermore, depending on the specifications of the private generator 1 (engine type and output size), the distance between the state monitoring terminal (sensor, etc.) and the generator panel 5 may become long due to the layout restriction inside the package 2. However, even in such a case, by dividing the terminal board 8 in the vicinity of each monitoring target (engine 3, generator 4, etc.), the section connected by the conventional wiring is shortened, and the corresponding amount is reduced. It is possible to replace the internal CAN communication cable 20, and it is not necessary to amplify the data signal on the way, long-distance data transfer is possible, wiring is simple (simple), and data transmission reliability is high.

  In the present embodiment, a normal serial transmission method is used as a data communication means between the auxiliary machine board 7 and the generator board 5, but this may be CAN communication.

In addition, a conventional alarm bell has been provided for reporting when a failure occurs in a private power generator. However, if an alarm bell is provided inside the housing (package), the soundproof function of the package is provided. Is excellent, there is a problem that it is difficult to hear the alarm sound of the alarm bell from the outside.
Therefore, in the private power generator 1 of the present embodiment, an open portion (a plurality of small holes or the like) is formed at an appropriate location of the package 2 (preferably a position away from the noise generation source such as the engine 3). Is provided with a warning means (bell, buzzer, speaker, etc.) with waterproof sound in the vicinity of the opening.
By configuring in this way, the alarm sound of the alarm bell can be heard from the outside, and when the private power generator 1 is installed outdoors, the alarm bell will not break down even if rainwater or the like enters from the open part. .

Further, as shown in FIGS. 2 and 3, on the front surface of the generator panel 5 of the private power generator 1, a power generation lamp 22 and a charging lamp 23 which are external display means required for the disaster prevention specification or the disaster prevention combined use specification are provided. A control power lamp 24, a failure lamp 25, and the like are provided.
When the private power generator 1 is used for disaster prevention or disaster prevention specifications, these external display means and the GCU 12 are connected by wiring, and when the private power generator 1 is used for other specifications, these external display means. And GCU 12 are not connected by wiring.
With this configuration, it is not necessary to prepare a different generator panel 5 for each specification, and it is possible to share parts, which contributes to cost reduction.

In addition, when the private power generator is used as a cold district specification, a heater for preventing freezing of piping for supplying fuel to the engine 3 is necessary, and accompanying this, wiring for supplying power to the heater is required. In the middle, an AC power circuit breaker (breaker) and detection means (disconnection detection means) for detecting disconnection of wiring are necessary.
In the private power generator 1 of the present embodiment, the AC power breaker and the disconnection detecting means are provided.
When the private power generator 1 is used in a cold district, the anti-freezing heater and the AC power circuit breaker, and the AC power circuit breaker and the DC power supply panel 9 (which supplies power to the heater) are connected by wiring. At the same time, the disconnection detecting means and the GCU 12 are connected.
Further, when the private power generator 1 is of other specifications, the anti-freezing heater is omitted while leaving the AC power circuit breaker, and the wiring for connecting the disconnection detecting means and the GCU 12 is omitted.
With this configuration, it is not necessary to prepare a different generator panel 5 for each specification, and it is possible to share parts, which contributes to cost reduction.

The private power generator 1 calculates fuel consumption (a value obtained by dividing the generated power by the amount of fuel) based on the data related to the fuel flow sensor and the data related to the generated power, and the calculation result is displayed on the touch panel 15. Can be displayed on the display surface 15a.
Further, in the case where the private power generation device 1 is a cogeneration device, in addition to the above fuel consumption, data relating to a fuel flow sensor (data relating to the amount of fuel used) and hot water obtained using exhaust heat Data relating to the supply amount, data relating to the temperature of the hot water (more precisely, the temperature difference between the water before being heated by the exhaust heat of the engine and the temperature of the hot water being raised by the exhaust heat), and power generation Based on the data related to electric power, the energy efficiency (the value obtained by dividing the sum of the generated power and the thermal energy obtained by the hot water divided by the thermal energy generated when the fuel is burned) is calculated. Can be displayed on the display surface 15 a of the touch panel 15.
By configuring in this way, the fuel efficiency or energy efficiency of the private generator 1 is grasped, and the cost merit (how much the power cost is reduced compared with the case where only commercial power is supplied to the external load) is grasped. Easy to do.
In addition, data relating to the fuel efficiency and energy efficiency can be stored in the GCU 12, or transmitted to an external personal computer for monitoring, and used as a material for determining the maintenance time of the private power generator 1 (for example, energy efficiency In the case where the pressure drops, lubricate various bearing portions of the private power generator 1).

The schematic diagram which shows the whole structure of the private generation device which concerns on one Example of this invention. The front view of a generator panel. The side view of a generator panel. The figure which shows the example of a display of the display part of a touch panel.

1 Power generator for private use 3 Engine 4 Generator 5 Generator panel 7 Auxiliary panel 8 Terminal panel

Claims (7)

Private power generation comprising a generator panel that controls the generated power generated by the engine driving the generator, an auxiliary panel that controls the auxiliary actuator, and a terminal panel that controls the state monitoring terminal In the device
The generator panel and the terminal panel are connected by CAN communication,
The terminal board is divided and placed near each monitoring target,
The auxiliary machine panel is configured to inverter-control the auxiliary actuator that drives the motor ,
It has a control program related to different types of predetermined engines, controls the engine using a control program corresponding to the engine provided in the private power generator, and has a pair of conflicting operation functions across the operation target. A touch panel is provided on the generator panel that is displayed separately from the top and bottom or left and right of the screen.
The touch panel can display data related to alarms and driving conditions,
A personal power generator characterized by selecting a connection to the terminal block and making it possible to use the touch panel according to the specifications . The private power generator according to claim 1, wherein the display surface of the touch panel is inclined with respect to the surface of the generator panel . The personal power generator according to claim 1 , wherein data relating to a failure history can be displayed on a display surface of the touch panel . The private power generator according to claim 1 , wherein a waterproof alarm means is provided at an open portion of the box constituting the generator panel . 2. The private power generator according to claim 1 , wherein a disaster prevention specification external display means is provided in a box constituting the generator panel . The private power generator according to claim 1 , wherein the private power generator is provided with an AC power circuit breaker and a disconnection detecting means for cold regions . In the private power generator, it is possible to acquire data on the amount of fuel used in the engine, the amount of hot water obtained by utilizing exhaust heat, and the temperature of the hot water, and the acquired data and the engine drive the generator The private power generator according to claim 1 , wherein the fuel consumption can be calculated based on data relating to the generated electric power.

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