JPS61244231A - Synchronous closing of several internal combustion power geneation equipment - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Field of the Invention] The present invention relates to a synchronization method for synchronizing generators of a plurality of internal combustion power generation facilities.

[Technical background of the invention and its problems] Internal combustion power generation equipment is generally installed in hospitals, hotels, etc. as an emergency power source. Moreover, due to reliability issues, multiple internal combustion power generation facilities have been installed. When the generators of multiple internal combustion power generation facilities are synchronized and operated in parallel, conventionally, the internal combustion engines of each internal combustion power generation facility are rotated at their rated speeds, and the output voltage of each generator is brought to the rated voltage. , a synchronization control device 11 controls the frequency, voltage, and phase of each generator to synchronize the generators.

However, the method using such a synchronization control device is highly dependent on the starting characteristics of the internal combustion engine and the speed governing characteristics of the speed governor, respectively, but normally from the time the starting command is issued until the synchronization is performed. A control time of 40 to 120 seconds is required.

Therefore, for example, one emergency power generation facility, for example, one that can supply power to a load in an emergency by synchronously turning on a plurality of internal combustion power generation facilities.
There was a problem when starting was completed within 0 seconds and used as an emergency lighting power source.

[Object of the Invention] An object of the present invention is to provide a method for synchronizing the generators of a plurality of internal combustion power generation facilities in a short time and supplying power to the load in an emergency. There is a particular thing.

[Summary of the Invention] According to the present invention, a method for synchronizing a plurality of internal combustion power generation facilities includes:
In addition to starting the internal combustion engines of multiple internal combustion power generation equipment based on a starting command, the outputs of the generators driven by each of these internal combustion engines are electrically connected, and a voltage is output from each of the generators. This is characterized in that a current is caused to flow between the source IwA, and this current generates a synchronizing force between the generators, thereby synchronizing the generators.

[Embodiment of the Invention] An embodiment of the present invention will be described below with reference to FIGS. 1 and 2. First, for convenience of explanation, a case will be described in which two sets of internal combustion power generation equipment are turned on simultaneously. In Fig. 1, reference numeral 1.2 is an internal combustion engine, and 3 and 4 are generators each driven by the internal combustion engine 1.2. The other internal combustion engine 2 and generator 4 also constitute a power generation facility.

When two sets of internal combustion power generation equipment are turned on at the same time,
The present invention is carried out in the following manner. First, internal combustion engines 1 and 2 are started based on a starting command, and the outputs of generators 3.4 are electrically connected by turning on switches 5 and 6, respectively.

Thereafter, a speed detector 15- provided on each internal combustion engine 1.2
1 and 16-1, when it is detected that the internal combustion engines 1 and 2 have reached the predetermined rotational speed A shown in FIG.

Speed relays 17.18 are actuated based on detection signals from speed detectors 15-1 and 16-1, respectively, thereby turning on switches 7.8. Here, when the switches 7 and 8 are turned on, an initial operation (not shown) occurs! Each initial excitation circuit consisting of a power supply, a switch 7.8 and a series resistor 9.10 is activated, and each generator 3.4 generates a voltage at point B shown in FIG.

At the same time, current flows between the generators due to the difference in output frequency and voltage phase output from each generator 3.4,
The synchronizing force begins to work. This synchronizing force increases as the rotational speed of the internal combustion engines 1 and 2 increases and the output voltage of the respective generators tall and 2 increases, that is, as the current flowing between the generators increases, and eventually this synchronization force between the generators increases. It is synchronized by the synchronization force.

Further, when it is detected by the speed detectors 15-2 and 16-2 that the internal combustion engines 1 and 2 have reached point C near the rated rotation speed shown in FIG.
-2 and 16-2, respectively, the speed relay 1
7.18 act, thereby respectively switching 13.14
is introduced at point D shown in FIG.

When each switch 13, 14 is turned on, each generator 3
．． 4 is automatically controlled to the rated voltage by automatic voltage regulators 11 and 12.

In this way, each of the generators 3 and 4 is synchronized by the synchronization force, and the voltage is automatically controlled by the automatic voltage regulator @11°12, and the rated rotation speed is maintained by the internal combustion engine 1 and 2, respectively. reaching this point to complete the start. after that,
The load side power supply switches SW+...SWn are turned on as appropriate, and power is supplied from the two generators 3.4 to a load (not shown).

Note that 19 is a controller that detects the output voltage of the automatic voltage regulators 11 and 12 and checks whether each of the automatic voltage regulators 1111 and 12 is functioning normally. Alternatively, if there is an abnormality in the switch 12, the corresponding switch 13 or 14 is opened, and only a predetermined switch among the power supply switches SW+...SWn is turned on to limit power supply.

[Effects of the Invention] As described above, in the present invention, the internal combustion engines of a plurality of internal combustion power generation facilities are started based on a starting command, and the output ends of the generators are electrically connected to each other, and then each generator is By outputting a voltage from the generator and passing a current between the generator and the generator, this current generates a synchronizing force between the generators, and the generators are turned on in synchronization, so that each internal combustion power generation equipment completes its startup. In some cases, the internal combustion power generation equipment has already been synchronously turned on, and the synchronization can be completed in a short time after a starting command is given. As a result, power can be quickly supplied to the load even in an emergency. Furthermore, the conventionally expensive synchronizing device is not required, making it possible to provide an inexpensive power generation device.

[Brief explanation of the drawing]

FIG. 1 is a system diagram for explaining a method for synchronizing a plurality of internal combustion power generation facilities according to the present invention, and FIG. 2 is a characteristic diagram of the rotation speed, voltage, and time of the internal combustion power generation facilities. 1.2... Internal combustion engine 3.4... Generator 5.6... Switches 11, 12... Automatic voltage regulator 19... Controller SW+~SWn... Power supply switch (8733 ) Agent: Yoshiaki Inomata, patent attorney (and 1 others)
name) →Nff1 Figure 2

Claims (1)

[Claims] In a synchronization system for a plurality of internal combustion power generation facilities, the internal combustion engines of the plurality of internal combustion power generation facilities are started based on a start command, and the outputs of the generators driven by the respective internal combustion engines are electrically connected. and then output voltage from each generator to flow a current between the generators, and this current generates a synchronizing force between the generators to synchronize the generators. How to synchronize internal combustion power generation equipment.