JPS62233028A - Automatic synchronized closing system of a number of generators - 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] [Industrial Application If] The present invention relates to an automatic synchronization system for multiple generators that automatically synchronizes all or a specific number of generators using an automatic synchronization device, and in particular, The present invention relates to a system suitable for a case where it is necessary to quickly and automatically synchronize one generator in a marine power generation plant or the like having a generator.

[Prior Art] A conventional generator automatic synchronization start-up system is generally configured as shown in Figure 5. The outline is as follows.

(1) Each engine “dL” that should be started by the synchronous operation command
Machine engine 2 starts.

[2] Among the generators started in paragraph (1) above,
The voltage, frequency, and phase of the mother m1 are set by the arrows by the automatic synchronization device 1t11 provided for each generator from the generator 1 & generator whose voltage has been established to be above a certain value or the generator according to a predetermined order. As shown by 13, the voltage, frequency, and phase of the generator 6 are detected as shown by arrow 14.

(3) Compare the voltage, frequency, and phase of the generator 6 that was also detected in (2) based on the heavy use, frequency, and phase of the mother IQI detected in (2), and calculate the voltage difference and frequency difference.・In order to keep the phase difference within a certain tolerance value, use automatic synchronization device #11 for the generator, adjust the excitation current of the generator 6 as shown by arrow 15, and adjust the governor of the generator engine 7 as shown by arrow 1.
Output a signal for adjustment as shown in 6.

When the voltage difference, frequency difference, and phase difference are within the allowable values, the automatic synchronization device 11 for the generator turns on the arrow 12.
0N10F connected to bus 1 and its generator 61 as shown in
A signal to turn on the F deflector 4 is output and synchronized.

However, if the voltage on the bus 1 detected in item 2) is non-voltage, the automatic synchronization device 11 activates the bus 1 and its generator 6.
The 0N10FF circuit breaker 4 connected to the
K is given. (This is the case when the first generator of No. 91 is connected to bus 1.) (4) According to (3), when the automatic synchronous input of one generator to bus 1 is completed, (2) ), automatic synchronization of the next transmitter *81 to bus 1 is sequentially performed via step (3).

[Problems to be solved by the invention] As described above, in the conventional automatic generator synchronization startup system, automatic synchronization startup is performed for multiple generators in sequence, so the number of generators is large. In some cases, it may take a considerable amount of time. Incidentally, when one generator is automatically synchronously turned on, it takes about 20 to 25 seconds to adjust the potential difference, frequency difference, and phase difference mentioned in item (3) above to within the permissible values.

Therefore, the present invention has the advantage that even when there are many generators,
The object of the present invention is to provide an automatic synchronous start-up system for multiple generators that can quickly perform automatic synchronous start-up.

[Means for Solving the Problems] In order to solve the above problems and achieve the object, the present invention takes the following measures.

Divide a large number of generators into groups according to several generators,
The busbars are also divided and classified into main busbars and subbusbars accordingly, so that the main busbar and subbusbar can be opened and closed by oN10FF circuit breakers or switches. The generators within the group are connected to the sub-bus. In addition, each generator is equipped with an automatic synchronization device for each generator.
Each group will be equipped with an automatic synchronization input device for each group. Thus, automatic synchronization processing is performed in a distributed and parallel manner.

[By taking such measures, the following effects occur.

When a synchronization command is issued, automatic synchronization is performed on the sub-bus by an automatic synchronization device for each generator in each group, one by one.

This is done simultaneously and in parallel for each group.

Furthermore, starting from the group f that has completed automatic synchronization on the sub-bus in each group at the same time or a predetermined group, the automatic synchronization device for groups automatically synchronizes that group on the main bus. An investment is made.

This is because the main bus and the sub-bus connected to the generators belonging to the group are separated, so the generators in the group can be automatically synchronized onto the sub-bus, and each group can be automatically synchronized onto the main bus. This is because the inputs can be processed independently and unrelated to each other, and simultaneously in a distributed and parallel manner, making it possible to significantly shorten the time it takes to complete the automatic synchronous input of a large number of generators.

The automatic synchronization device for electric generators compares the voltage, frequency, and phase of the generator based on the voltage, frequency, and phase of the sub-bus to be synchronized.

The excitation current of the generator and the governor of the generator engine are controlled so that the voltage difference, frequency difference, and phase difference are within appropriate tolerances, and when the voltage difference, frequency difference, and phase difference are within appropriate tolerances, the synchronous input to the sub-bus is started. ing.

In addition, the automatic synchronization device for each group compares the voltage, frequency, and phase of the main bus to be synchronized with the reference K, and the voltage, frequency, and phase of the sub bus of the group to be synchronized, and then Control the excitation current of each generator in the group and the banner of each generator engine at the same time so that the voltage difference, frequency difference, and phase difference are within the values, and when the banner is appropriate, move to the main bus. , it is an allK that synchronizes the entire group.

Embodiment FIG. 1 is a diagram showing the configuration of an embodiment of the present invention. This will be explained below with reference to FIG.

(1) According to the synchronous operation command), each generator group 3
Each generator engine 7 to be started belonging to θ is started.

Item (1) is processed independently and simultaneously within each generator group.

(2) Next, among the generators started in item (1) belonging to each generator group f30, the automatic synchronization device JJK OK, set the voltage, frequency, and phase of sub-bus 3 to arrow 1.
3, and the voltage, frequency, and phase of the generator 6 are detected as shown by the arrow 14.

(3) Based on the voltage, frequency, and phase of the sub-bus 3 detected in (2), compare the voltage, frequency, and phase of the generator 6 detected in (2), and compare the voltage difference and frequency. The excitation current of the generator 6 is set by the arrow 15 using the automatic synchronization device 11 for one generator so that the difference/phase difference is within a certain tolerance value.
As shown, the governor of the generator engine 7 is shown by arrow 16.
It sends out a signal to adjust as shown below.

Of course, the voltage, frequency, and phase in item (2) are constantly detected and adjusted.

When the voltage difference, frequency difference, and phase difference are within the allowable values, the automatic synchronization closing device 11 closes the 0N10FF circuit breaker connecting the sub-bus 3 and its generator 6 to N.
A signal is output as shown by the arrow 17 to turn on the 0N10FF circuit breaker 4 and synchronize it.

However, if the voltage of the sub-bus line 3 detected in item 2) is no voltage, the automatic synchronization device 11 immediately turns on the voltage. (
This is the case when the first generator is connected to the sub-bus 3. ) (4) When the automatic synchronization of the 51 generators to the sub-bus 3 is completed according to paragraph (3), the next step is performed again according to paragraph (2).
The automatic synchronization of the generators to the sub-bus 3 is sequentially performed through step (3).

(5) Items (1) to (4) are processed independently and in parallel within each generator group. In addition, the following items (6) to (8) are also processed independently and in parallel.

(6) Within each generator group (among the generator groups for which the automatic synchronization of items 11 to 4) has been completed for a predetermined number of units, the The automatic synchronization device 12 for the generator group detects the voltage, frequency, and phase of the main bus 2 as shown by arrow 18, and the voltage, frequency, and phase of the sub bus 3 of the generator group fso as shown by arrow 19. .

(7) (The voltage, frequency, and phase of the main bus 2 detected in Section 61 are the reference K, and the voltage, frequency, and phase of the sub-bus !I3 of the generator glue fso detected in Section (6) are the same. The automatic synchronization device 1 for the generator group is compared to ensure that the voltage difference, frequency difference, and phase difference are within certain tolerance values.
A signal is issued to simultaneously adjust the excitation currents of the generators 6 in synchronous operation in the generator group 20 to 22, and to adjust the governors of the generator engines 7 in the same manner as 23 to 25. Of course, the voltage, frequency, and phase in item (6) are constantly detected and adjusted.

When the voltage difference, frequency difference, and phase difference are within the allowable values, the automatic synchronization device 12 for the I2i machine group is activated.
Accordingly, the main bus 2 and the sub-bus 3 of its generator group 30
0N10FF circuit breaker or switch connecting s t-O
Send the NK signal as shown by arrow 26.

The 0N10FF circuit breaker or switch 5f is turned ON, and each generator 6 in the generator group 3o is synchronously connected to the main bus 2.

However, if the voltage of the main bus 2 detected in item 6) is unrolled, the automatic synchronization device tl for that generator group:
! 0N10FF #4aF! which connects the live mother a,' and the sub-bus 3 of its originator group 30. The fr device or switch 5Fi is turned on immediately. (This is the case when the first generator group of υ14tL is connected to the main bus 2.6)
Also, if the 0N10FF cutoff or switch 5 connecting the sub bus 3 and main bus 2 of the generator group 3o is already OFF.
In the case of the N state, synchronization to the sub-bus 3 by the automatic synchronization device II for each generator within the generator group in items (1) to (4) is performed, that is, the synchronization to the sub-bus 3 is birth mother #5
It is synchronized to I2. Therefore, in that case, for that generator group 3o, as in the first half of paragraph (7),
With the automatic synchronization device 12 for the generator group,
There is no need to turn on the 0N10FF circuit breaker or switch 5 that connects the main bus 2 and the sub-bus 3 of the generator group 30 again.

(8) (Due to the force term, the main bus 2 of one generator group
When the automatic synchronization is completed, the next automatic synchronization to the main bus 2 of one generator group is (6) again.
7) will be carried out sequentially.

(91 ((31) to (8) are processed independently and in parallel with the automatic synchronization of each generator in each generator group to the sub-bus in (1) to (4). I'm going to go.

In the manner described above, all the generators to be operated in a predetermined synchronous manner are synchronously connected to the main bus 2 in accordance with the command for synchronous operation. In that case, as shown in paragraphs (5) and (9), automatic synchronization of each generator in each generator group onto the sub-bus, and automatic synchronization of each generator group with the main bus. Since the power-on processing can be performed independently and in parallel, the total time required to complete the automatic synchronous power-on of all the generators can be shortened.

It should be noted that the present invention is not limited to the embodiments described above, but can be similarly implemented in the following manner.

[IL Coco generators are divided into groups according to the number of generators in the first stage), and each of these groups is further divided into groups according to the number of generators in the second stage),
j! ! Then, the grouping is subdivided into 2-stage, 3-stage, and higher stages, such as 6 groups of these groups are divided into groups according to the number of generators (3rd stage), etc. It is also possible to do so.

[b] In carrying out the present invention, the method of dividing and classifying the main bus bar and sub bus bar and the installation form of the 0N10FF circuit breaker or switch between the main bus bar and the sub bus bar or between the sub bus bars will also be described in this article. As shown in FIG. 3, FIG. 4, FIG. 5, etc., the invention can be modified and implemented in various ways without changing the gist of the invention.

[Effect of the invention] According to the present invention, the following effects are achieved.

+1) Classify a large number of generators into several groups, and at the same time set up a sub-bus for the generator group, divide and classify the bus into main bus and sub-bus, and connect 0N10FF between the sub-bus and main bus. A circuit breaker or switch is installed, and automatic synchronization of the generators within the group onto the sub-bus and automatic synchronization of the automatic synchronization onto the main bus of each group are performed simultaneously, distributed, and in parallel using dedicated automatic synchronization devices. In order to make it possible,
Compared to conventional systems that automatically synchronize power-on using sequential and serial processing, it is possible to automatically synchronize a large number of generators in a short time and quickly.

(2) Even if the main bus and sub-bus are connected and there is one or more generators in the generator group that are already operating synchronously, other generators in the generator group will be synchronized to the main bus. For the generator to be turned on, the generators that are currently operating synchronously within the generator group are stopped, and the connection between the main bus and sub-bus is temporarily changed to synchronize the generator group. There is no need to perform operations such as disconnecting the device and reconnecting it in synchronization.

Since the main bus and sub-bus are already connected,
This is because the generators that will be synchronously applied to the sub-bus will now be synchronously applied to the main bus.

In this way, in the present invention, even if there is a generator in the generator group that is already operating in synchronization with the main bus, one generator at a time without any special consideration. It is possible to automatically synchronize other generators in the machine group onto the main bus.

(3) Automatic synchronization! Regarding the automatic synchronization system, the automatic synchronization system for each generator in each generator group may be a conventional system, and the automatic synchronization system for each generator group can also be used for each generator in the group and each generator engine. Although it is necessary to use multiple contacts in order to simultaneously send a batch adjustment signal to the governor, the present invention can be realized by partially improving the conventional automatic synchronization device, and the conventional device is significantly improved. Available.

Of course, there is no problem with equipping special equipment.

[Brief explanation of drawings]

FIG. 1 is a diagram showing the configuration of an embodiment of the present invention, and FIGS. 2, 3, and 4 show a method for dividing and classifying the main bus bar and sub bus bar in the same embodiment, and a method for dividing and classifying the main bus bar and sub bus bar in the same embodiment. It is a figure which shows the modification of the installation form of the 0N10FF circuit breaker or switch between busbars or between subbusbars. FIG. 5 is a diagram showing the configuration of a conventional example. 1...Bus bar, 2...Main bus bar, 3...Subbus bar, 4...
...0N10FF circuit breaker for generator, 5...main bus bar・
0N10FF circuit breaker or switch between sub-buses or between sub-buses, 6... Generator, 7... Generator engine,
8... Connection part between generator and power generation area engine, 10...
Onboard load, 11...Automatic synchronized loading device for departure'yaiso,
12... Automatic synchronization device for generator group, 13
... Signal flow when detecting the voltage, frequency and phase of the sub bus or bus bar according to 11, Signal flow when detecting the voltage, frequency and phase of the generator according to 14...11, 15...11
tA adjustment of the excitation current of the generator = straddle flow, 16.
The flow of the governor adjustment signal of the generator engine by 11, and the flow of the generator synchronization signal by 17...11. The flow of the im signal when detecting the voltage, frequency, and phase of the main 4H by 18...12, the flow of the signal when detecting the voltage, frequency, and phase of the sub bus by I9...12, 20-22...
The flow of the excitation current adjustment signal of each generator in the generator group by 12, the flow of the governor adjustment signal of each generator ennon in the generator group by 23-25...12,
26...Flow of synchronization signal for generator group by 12, 27... Generator electric wire, 30... Generator group. Applicant Sub-Agent Patent Attorney Takehiko Suzue!・31
Prisoner 2 Figure 3 Figure 254 Figure 5 Commissioner of the Patent Office Michi Uga! I! h. 1. Indication of Case Patent Application No. 61-073873 2. g. Ming Name Automatic Synchronization System for Multiple Generators 3. Person Making Amendment Relationship with Case Patent Applicant (620) Mitsubishi Heavy Industries, Ltd. 4 , sub-agent

Claims (1)

[Claims] In an automatic synchronization system for multiple generators that automatically synchronizes all or a specific number of generators using an automatic synchronization system, the generators that are directly connected to a large number of engines and each of these generators are classified into multiple groups. A sub-bus bar arranged for each group, a main bus bar connected to these sub-bus bars, a circuit breaker or a switch provided between this main bus bar and the sub-bus bar, and each of the groups. The system is equipped with an automatic generator synchronization device that automatically synchronizes each generator in the group to each sub-bus line, and an automatic group synchronization device that automatically synchronizes each of the generators in each group. An automatic synchronous injection system for multiple generators characterized by simultaneous distributed and parallel processing using a synchronous injection device.