JPH04311655A - Dynamo engine stop control device - Google Patents

Abstract

PURPOSE:To enable the safe stop of a dynamo engine by performing such control as to let output power by the residual energy of a generator be consumed by a power consumption means at the time of stopping power supply from the generator to power load. CONSTITUTION:Power load 15 and an adjusting device 16 are parallel-connected to the output lines 13 of a synchronous generator 12. The adjusting device 16 is formed of a control means and a power consumption means such as a heater. At the time of stopping the use of the power load 15, the output of a Stirling engine (dynamo engine) 11 is reduced, and at the same time, the power supply to the power load 15 is stopped. Then the load of the synchronous generator 12 becomes zero, and the rotating speed of the engine 11 is increased by its residual heat energy, but since this is detected by an engine speed detecting means 17, the demand at the power consumption means 3 is controlled by the control means so that the output of the engine speed detecting means 17 does not exceed the specified value to let the engine 11 come to a stop safely.

Description

[Detailed description of the invention]

0001

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a stop control device for a power generation engine, and is particularly applicable to a power generation engine that uses a Stirling engine or the like.

0002

2. Description of the Related Art Conventionally, a Stirling engine has been used as a power generation engine for driving a generator, and the output power of the generator is outputted to a power load such as an electrical device via a switch or the like.

[0003] As is well known in the Stirling engine, which is an external combustion engine, working gas reciprocates between an expansion space and a compression space provided at both ends of the working space, and the working gas moves near the expansion space. It is heated by the disposed combustion chamber and cooled by the cooler disposed near the compression space.

0004

However, in the above-mentioned prior art, when a power load is no longer in use, the switch is shut off to stop supplying power from the generator to the power load. However, because the Stirling engine stores a large amount of thermal energy in its combustion chamber, it can generate power even if the fuel supply to the engine is stopped or the working gas pressure is reduced.

[0005] Therefore, a Stirling engine that continues to operate even though the load on the generator has become zero may be subject to various adverse effects.

Therefore, the technical object of the present invention is to stop the power generation engine without causing any trouble when the power load is stopped.

[0007]

[Structure of the invention]

[0008]

[Means for Solving the Problems] The technical means of the present invention taken to solve the above-mentioned technical problems of the present invention include a generator, a power generation engine that drives the generator, and a power generation engine. It has a rotation speed detection means for detecting the rotation speed, a power load arranged on the output line of the generator, and a control means and a power consumption means arranged in parallel with the power load on the output line, When the power supply from the generator to the electric load is stopped, the control means causes the power consumption means to consume the output power of the generator, and generates electricity without the output signal of the rotation speed detection means exceeding a specified value. The new engine was designed to stop the engine.

[0009]

[Operation] According to the technical means of the present invention described above, even if the load on the generator becomes 0 due to the stoppage of use of the power load, the control means causes the power consumption means to consume the output power of the generator. , power generation engines with residual energy can be safely stopped.

0010

DESCRIPTION OF THE PREFERRED EMBODIMENTS Examples embodying the technical means of the present invention will be described below with reference to the accompanying drawings.

In a power generation engine stop control device 10 according to an embodiment of the present invention shown in FIG. 1, a synchronous generator (generator) 12 is driven by a Stirling engine (power generation engine) 11. The output line 13 of this synchronous generator 12 is connected to a power load (for example, electrical equipment, etc.) 15 via a switch 14, and is also connected in parallel to the power load 15 to a regulating device 16.

The rotation speed of the Stirling engine 11 is constantly detected by the rotation speed detection means 17. Further, combustion air is supplied to the Stirling engine 11 by a blower 18, and fuel is supplied by a fuel source and an injection nozzle (not shown). Furthermore, engine cooling water is supplied by a cooling water pump 19.

In FIG. 2, the regulating device 16 includes a rectifier 2
0, power transistor 21 and PWM control device (Pu
control means 24 consisting of a pulse width modulation control device) 22;
and a power consumption means 23 such as a heater.

The operation of the power generation engine stop control device 10 having the above configuration will be explained below.

When the power load 15 is in use, the Stirling engine 11 operates to drive the synchronous generator 12, and its output power is supplied to the power load 15 via the switch 14 which is in the "closed" state.

Now, when the use of the electric power load 15 is stopped, the working gas pressure of the Stirling engine 11 is lowered or the fuel supply is cut off to reduce its output. At the same time, the switch 14 enters the "open" state, and power supply from the synchronous generator 12 to the power load 15 is stopped. Then, since the load on the synchronous generator 12 becomes "0", the rotation speed of the Stirling engine 11 increases due to its residual thermal energy. This rotational speed increase information is detected by the rotational speed detection means 17, and when the output signal is inputted to a CPU (not shown), etc., the rotational speed detection means 17 The CPU operates the adjustment device 16 so that the output signal of the output signal does not exceed a specified value.

That is, by converting the AC voltage output from the synchronous generator 12 into a DC voltage by the rectifier 20 and by chopping the power transistor 21 by the PWM control device 22, the amount of power consumed by the power consumption means 23 can be made linear. Control. The amount of power consumed by the power consumption means 23 gradually decreases as the thermal energy remaining in the Stirling engine 11 decreases.

As described above, Stirling engine 1
The output of Stirling engine 1 gradually decreases, and eventually the blower 18 and cooling water pump 19 are stopped and the Stirling engine 1 is turned off.
1 stops entirely.

[0019]

[Effects of the Invention] As shown above, in the present invention, when the load on the generator becomes 0 due to the stoppage of use of the electric power load, the power generation engine with residual energy can be used even if the supply of fuel etc. is stopped. Although the generator cannot be suddenly stopped and continues to be driven, the control means causes the power consumption means to consume the output power of the generator driven by the residual energy of the power generation engine based on the output signal of the rotation speed detection means. Therefore, the residual energy of the power generation engine is gradually consumed, making it possible to safely stop the power generation engine.

[Brief explanation of drawings]

FIG. 1 shows a configuration diagram of a power generation engine stop control device 10 according to an embodiment of the present invention.

FIG. 2 shows a configuration diagram of main parts in FIG. 1.

[Explanation of symbols]

10 Stop control device for power generation engine, 11 Stirling engine (power generation engine), 12 Synchronous generator (generator), 13 Output line, 15 Electric power load, 23 Heat dissipation means, 24 Control means.

Claims (1)

[Claims] 1. A generator, a power generation engine for driving the generator, a rotation speed detection means for detecting the rotation speed of the power generation engine, and a power load disposed on an output line of the generator. and a control means and a power consumption means arranged in parallel with the power load on the output line, and when power supply from the generator to the power load is stopped, the control means Stopping the power generation engine, wherein the power generation engine is stopped without causing the output power of the generator to be consumed by the power consumption means and the output signal of the rotation speed detection means exceeds a specified value. Control device.