JP2006138287A - Control device for power generator driven by internal combustion engine - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a control device for an internal combustion engine driven power generation installation, actualizing stable and continuous generating operation with a high operating rate of the power generation installation. <P>SOLUTION: The control device controls the generation output of the internal combustion engine driven power generation installation which has a generator 2 to be rotated in synchronization with the driving force of an engine 1 for generating power and a cooling system 3 and a cooling means 4 using refrigerant for cooling the engine 1. It comprises a first measuring means 5 for measuring the temperature of refrigerant in the cooling means 4 and a control means 8 for controlling an engine control means 1a of the engine 1 while comparing a value measured by the first measuring means 5 with a preset reference temperature and correcting a target value for generation with an internal combustion engine. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a control device for an internal combustion engine-driven power generation facility such as a diesel engine, and in particular, can maintain power generation and improve power generation efficiency.

  In a control device in an internal combustion engine-driven power generation facility that uses a conventional internal combustion engine such as a day cell engine or a gas engine and generates power using a generator while cooling the internal combustion engine, the power generation target value is set in advance. Power generation is controlled. In addition, in a control device in a gas turbine power generation facility that uses a gas turbine to generate power while cooling the generator, in order to prevent the generator from being overloaded and to operate efficiently, the power generation output amount is controlled by the intake combustion air temperature of the gas turbine. Control is performed (see, for example, Patent Document 1 and Patent Document 2). In another conventional gas turbine generator protection control device, the target power of the generator output is controlled in accordance with the cooling temperature of the synchronous generator cooled by the outside air (see, for example, Patent Document 3). .

JP 7-87798 A JP-A-4-285500 JP-A-8-21264

  In the output control of the control device of the conventional internal combustion engine drive power generation equipment, the generator maximum output power is the generator rated output value (constant) based on the predetermined use conditions, and the engine cooling system performance deteriorates during operation under this control When such a situation occurs, the power generation is stopped by automatic stop of the internal combustion engine by issuing a warning alarm for a coolant temperature rise for the purpose of protecting the engine. This alarm temperature is an initial set value (fixed), and there is a problem that the internal combustion engine is frequently stopped.

  The present invention has been made to solve the above-described problems, and can be performed even when the cooling system of the internal combustion engine is deteriorated so that sufficient cooling capacity cannot be exhibited or when the ambient temperature condition is severe. It is an object of the present invention to obtain a control device for an internal combustion engine-driven power generation facility capable of continuing power generation as long as possible.

  The present invention relates to a control device for controlling the power generation output of an internal combustion engine-driven power generation facility having a power generator that rotates in synchronism with the driving force of the internal combustion engine and cooling means for cooling the internal combustion engine with a refrigerant. The first measuring means for measuring the refrigerant temperature of the cooling means, the measured value of the first measuring means and the preset reference temperature are compared, the power generation target value of the internal combustion engine is corrected, and the internal combustion engine And a control means for controlling.

  The control apparatus for an internal combustion engine-driven power generation facility according to the present invention comprises an internal-combustion-engine-driven power generation that includes a generator that rotates in synchronism with the driving force of the internal combustion engine, and a cooling means for cooling the internal combustion engine with a refrigerant. In the control device for controlling the power generation output of the facility, the first measuring means for measuring the refrigerant temperature of the cooling means, the measured value of the first measuring means and the preset reference temperature are compared, and the internal combustion engine Since the control means for correcting the power generation target value and controlling the internal combustion engine is provided, stable power generation operation can be continued, and power generation equipment with high accuracy and high operating rate can be obtained.

Embodiment 1 FIG.
The embodiments of the present invention will be described below. 1 is a diagram showing a configuration of an internal combustion engine drive power generation facility and a control device according to Embodiment 1 of the present invention, FIG. 2 is a flowchart showing a control method of the control device shown in FIG. 1, and FIG. 3 is shown in FIG. FIG. 4 is a block diagram showing the function of the control device, and FIG. 4 is a diagram showing the relationship between the possible output and the refrigerant temperature in the refrigerant temperature vs. possible output correction of the internal combustion engine of the first embodiment of the present invention. In the figure, an internal combustion engine drive power generation facility and a control device are rotated by an engine 1 as an internal combustion engine composed of a diesel engine or a gas engine, an engine control means 1a for controlling the engine 1, and a driving force of the engine 1. A generator 2 for generating electric power, a second measuring means 2a for measuring the outside air temperature in the vicinity of the generator 2, a cooling system 3 for cooling the engine 1, and a refrigerant in the cooling system 3 The cooling means 4 for generating the cooling water, the first measuring means 5 for measuring the temperature of the cooling water of the engine 1, the current transformer 6 for the instrument, the transformer 7 for the instrument, and the engine 1 It comprises control means 8 for transmitting a control signal to the engine control means 1a for control, and a detector 9 for detecting received power.

  Next, functional blocks of the configuration of the control means 8 will be described in detail based on FIG. From the generated power detection unit 8a for detecting the current generated power value from the signals from the current transformer 6 and the transformer 7, the received power input unit 8b for inputting the signal from the detector 9, and the second measuring means 2a The engine 1 is cooled from the outside temperature input unit 8c for inputting a signal of outside temperature (air in the vicinity of the generator and serving as cooling air for the generator) and the first measuring means 5. Engine cooling water temperature input unit 8d for inputting the temperature signal of the cooling water, other signal human power unit 8n for inputting signals other than these, and a generator for setting the generator rated value, outside air temperature vs. possible output value, etc. A data setting unit 8e; a power reception target power setting unit 8f for setting a target power reception amount; an engine cooling water reference temperature setting unit 8g for setting a reference temperature for cooling water of the engine 1; Sets the correction value And a gin data setting unit 8h.

  Further, the generated power detection unit 8a as an input unit, the received power input unit 8b, the outside air temperature input unit 8c, the engine coolant temperature input unit 8d, and other input values from the other signal input unit 8n and a generator as a setting unit The comparison calculation unit 8i that compares the set values from the data setting unit 8e, the power reception target power setting unit 8f, the engine coolant reference temperature setting unit 8g, and the engine data setting unit 8h and performs a predetermined calculation, and the comparison calculation result The power generation target value calculation unit 8j that receives the power generation target value and the power generation control signal output unit 8k that outputs the fuel input signal of the engine from the power generation target value. The control means 8 outputs an increase / decrease control signal of the engine fuel input amount to the engine control means 1a to increase / decrease the power generation output, thereby performing target received power control.

  Next, the operation of the control device for the internal combustion engine-driven power generation facility according to the first embodiment configured as described above will be described with reference to FIGS. First, the control means 8 has a function as shown in FIG. 3, and performs increase / decrease control of the fuel input amount to the engine 1 via the engine control means 1a so that the received power value becomes the power generation target value. It is. A method for setting the power generation target value will be described with reference to FIG. First, it is determined whether or not the power generation facility is connected to the power receiving system (step S200 in FIG. 2). If not (NO), return to the beginning. If the connection is established (YES), the received power value from the received power input unit 8b is input (step S303 in FIG. 2). Next, the generator electricity detector 8a detects and inputs the output power of the generator (step S301 in FIG. 2). Next, it is determined whether or not the detected received power value is less than or equal to a preset power generation target value (step S201 in FIG. 2).

  If the power generation target value is equal to or less than the power generation target value (YES), the power generation target value power is equal to the current generator output (step S209A in FIG. 2), and the process proceeds to step S210. When the received power exceeds the power generation target value (NO), the power generation target value of the generator 2 is set to the generator rated output value in order to keep the power received below the power generation target value. . For this purpose, the measured temperature (Tx) of the cooling water for the engine 1 is inputted from the first measuring means 5 (step S302 in FIG. 2). And it is judged whether it is lower than the reference temperature (To) preset by the engine cooling water reference temperature setting part 8g (step S203 of FIG. 2). If it is determined that it is low (YES), it is determined whether or not the generator output power detected by the generated power detection unit 8a is the generator rated output value set by the generator data setting unit 8e (FIG. 2 step S204).

  When the generator rated output value is not reached (NO), the generator rated output value is set as the power generation target value (step S209 in FIG. 2). Next, a control signal is output to the engine control means 1a so as to set the fuel input amount corresponding to the power generation target value (step S210 in FIG. 2). When the engine coolant temperature (Tx) is equal to or higher than the coolant reference temperature (To) (NO in step S203 in FIG. 2), the power generation target value is decreased (step S205 in FIG. 2). Specifically, as shown in FIG. 4, the output of the internal combustion engine (engine) is approximately a predetermined coefficient from the predetermined generator rated output to the cooling water temperature when the temperature of the cooling water of the internal combustion engine is higher than a certain reference temperature. The possible output decreases in inverse proportion. For this reason, it is necessary to reduce this power generation target value from a generator rated output in inverse proportion to the cooling water temperature above a certain reference temperature. Note that this engine coolant temperature vs. possible output correction table is set in advance in the engine data setting unit 8h of FIG. In accordance with the reduced power generation target value, the amount of fuel input to the engine 1 is decreased (step S206 in FIG. 2).

  Next, a certain confirmation time is set (step S207 in FIG. 2), the power generation target value is corrected until the input engine coolant temperature becomes lower than the reference temperature, and output control at the power generation target value is continued. (Repeat step S205 to step S208 in FIG. 2). On the other hand, when the coolant temperature of the engine 1 becomes lower than the reference temperature during the power generation correction (target value decrease) control (step S208 in FIG. 2), the power generation is performed after a certain confirmation time (not shown) has elapsed. Machine rated output operation control is performed (step S209 in FIG. 2). Then, the process returns from step S210 in FIG. 2 to step S200 (from return to start), and the above control flow is repeated. In a state where the received power value input by the received power input is smaller than the power generation target value (YES in step S201 in FIG. 2), the power generation target value maintains the current power generation output and the operation is continued (in FIG. 2). S209A).

  According to the control device for the internal combustion engine-driven power generation facility of the first embodiment configured as described above, when the engine cooling water temperature is low, the generated power is operated at a high output within the range of the generator rated output. If the cooling water temperature is high, the power generation operation can be performed with the generated power correction value corresponding to the cooling water temperature. Therefore, stable power generation operation and operation rate can be improved.

Embodiment 2. FIG.
In the first embodiment, the power generation target value when the refrigerant temperature of the engine is lower than the reference temperature is set as the generator rated output. However, the second embodiment is for pursuing a method for further improving the power generation efficiency when the refrigerant temperature has a margin.

  FIG. 5 is a flowchart for illustrating a control method of the control device for the internal combustion engine-driven power generation facility according to the second embodiment of the present invention. In addition, since the structure of a combustion engine drive electric power generation installation and a control apparatus is the same as that of the said Embodiment 1, the description is abbreviate | omitted suitably.

  Next, a control method of the control device for the internal combustion engine drive power generation facility of the second embodiment configured as described above will be described. First, the operation is performed in the same manner as in the first embodiment, and when the received power value input to the received power input unit 8b exceeds the received power target value (NO in step S201 in FIG. 5), the received power In order to suppress the electric power below the power generation target value, the power generation target value of the generator is input as the outside air temperature (generator cooling air) measured by the second measuring means 2a (step S300 in FIG. 5), The generator maximum output value corresponding to the outside air temperature is set (step S202B in FIG. 5). It is assumed that the generator maximum output value corresponding to the outside air temperature is set in advance by the generator data setting unit 8e in FIG.

  Hereinafter, control is performed in the same manner as in the first embodiment based on the generator maximum output value. However, in the correction of the power generation target value when the engine cooling water temperature is higher than the reference temperature (decrease of the target value), the power generation after the cooling water temperature becomes lower than the reference temperature (in the case of YES in step S208 in FIG. 5). The target value is not the generator rated output in the first embodiment but increases to the generator maximum output value corresponding to the outside air temperature shown above (step S209B in FIG. 5).

  According to the control apparatus for the internal combustion engine-driven power generation facility of the second embodiment configured as described above, the power generation target value of the generator when the engine coolant temperature is lower than the reference temperature is set to the outside air temperature (generator cooling air temperature). Since the generator is set to the maximum input / output value corresponding to), the generator operation is performed in accordance with the ambient conditions, so that the generator itself can be prevented from being overloaded and can be stably operated with high efficiency.

It is a figure which shows the structure of the internal combustion engine drive power generation equipment and control apparatus of Embodiment 1 of this invention. It is a flowchart which shows the control method of the control apparatus shown in FIG. It is the block diagram which showed the function of the control apparatus shown in FIG. It is a refrigerant | coolant temperature versus possible output correction | amendment of the internal combustion engine of Embodiment 1 of this invention. It is a flowchart which shows the control method of the control apparatus of the internal combustion engine drive power generation equipment of Embodiment 2 of this invention.

Explanation of symbols

1 engine, 1a engine control means, 2 generator, 2a second measurement means,
3 Cooling system, 4 Cooling means, 5 First measuring means, 8 Control means.

Claims (2)

In a control device for controlling the power generation output of an internal combustion engine-driven power generation facility having a power generator that rotates in synchronization with the driving force of the internal combustion engine and a cooling means for cooling the internal combustion engine with a refrigerant, The first measuring means for measuring the refrigerant temperature of the cooling means, the measured value of the first measuring means and a preset reference temperature are compared, the power generation target value of the internal combustion engine is corrected, and the internal combustion engine A control device for an internal combustion engine-driven power generation facility, comprising control means for controlling the engine. A second measuring means for measuring an outside air temperature in the vicinity of the generator; and the control means is a power generation target value when the refrigerant temperature detected by the first measuring means is lower than the reference temperature. Applies the generator maximum output value corresponding to the outside air temperature input from the second measuring means, and as a power generation target value when the refrigerant temperature detected by the first measuring means is higher than the reference temperature 2. The control apparatus for an internal combustion engine-driven power generation facility according to claim 1, wherein a reduction correction value lower than the power generation target power value corresponding to the refrigerant temperature is applied.

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