JPS5939949A - Automatic controlling method for engine of diesel generator in parallel operation - Google Patents

Abstract

PURPOSE:To enable interruption of the running of arbitrary one of Diesel generators by operating a running cut-off switch which cuts off an engine start command circuit, an engine start detecting circuit, and an engine stop command circuit at a time. CONSTITUTION:An engine automatic controller 1' consists of a controlling power supply change-over part A', an engine start command part B', an engine start detecting part C' (not shown), an engine stop part D' (not shown), and a running cut-off switch 43EG. The running cut-off switch 43EG is an interrupting circuit for interrupting the running of arbitrary one of four generators EG1 to EG4. Thus, the running of an arbitrary generator may be interrupted by one engine controller.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an automatic engine control method for diesel generators in which a plurality of diesel generators are operated in parallel.

To explain the engine start command of a conventional diesel generator using the diesel generator engine control device shown in Fig. 1, when the tasel is emitted, the generator G uses the diesel engine (hereinafter referred to as engine) I)B as the drive source. Driven.

Starting and stopping of this engine DH is controlled by an automatic engine control device 1. The engine automatic control shaft @1 is connected to the control power supply section, starting/stopping opening/closing 3EG, starting relay 61 times contact 6a, starting relay 88MX, same contact 8
8MXa, an engine start command section B consisting of successful start relay contacts 14b, 14b2, and a successful start relay 14-2.
．． An engine start detection section C consisting of the same contact 14a, a stop relay 5X, the same contact 5X a + a stop auxiliary relay 5Z
, a contact sZa, and a contact 6b.The engine DB is started by a start stop switch 3.
When the EG is turned on, the starting relay 6 is energized and the contact 6b is OFF.
FF, contact 6a is ONL, starting relay 88MX is excited, contact 88MXa is ON, magnetic relay M-R
is excited and starter motor SM starts.

When the engine DE self-destructs, the contact 14a1 is turned ON by the excitation of the successful start relay 14-1 on the engine side, the relay 14-2 is energized, the contact 14a is turned ON, and the contact 1
4 b, e 14 b, The engine start command is turned OFF with the power OFF signal (7), and the engine DE enters normal operation.

When stopping the engine DB, the relay 6 is demagnetized by turning off the switch 3EG, and the contact 6a is turned off.
, the contact 6b is turned on, the stop relay 5X is energized, and the contact 5Xa is set to 0. N stop relay S 'l' P -R
is energized, and the stop solenoid S'1''P-8O is energized for a certain period of time to cut the fuel and stop the engine DE.

Stop auxiliary relay 5Z is stop solenoid S 'I' P
-8O is energized, contact sZa is turned on and relay 5X is energized, but as the engine speed decreases, relay 14-1 is demagnetized and contact 14a,
75fOF, relay 14-2 is demagnetized, contact 14b + 114 bt is ONL, and contact 14a2 is OFF.
F is given. After a certain period of time has elapsed, the succeeding electric appliance 5Z is demagnetized and the contact 5Za is set to 0FFL, the relay 5X is demagnetized and the contact 5Xa is set to OFF', and the engine control device 1 is in the initial state as shown in FIG.

Note that CD indicates a charging dynamo of batch IJBT.

Figures 2 and 3 are explanatory diagrams showing the relationship between the elapsed time after starting the engine, the engine speed N, and the batch'Ill pressure. and the number of revolutions N. Fig. 3 (a) shows the rotational speed NI N, IN when the engine does not self-destruct. Fig. 2(b) shows a state in which the battery voltage Vo recovers after passing through xD engine self-destruction point 0 at the time of engine starting, and Fig. 3(b) shows a state in which the battery voltage Vo recovers after a certain period of time has elapsed from the time of engine starting. ,
, V, represent the recovered state, ■ is the battery voltage when the battery is under no load, VA is the minimum operating voltage of the engine control device, and as shown in Figure 2 (b), after the engine self-destruction. However, for a certain period of time, the battery voltage ■. is the minimum operating voltage.
, Cυ are low and therefore unsuitable for engine control power supply.

Generally, the control power source for the automatic engine control device is supplied from the first battery BT via the stabilizing power supply device 2, or by providing another independent battery BT (shown with chain lines in Figure 1) to control the engine. Supplying power.

The present invention has been made in view of the above, and its purpose is to provide a stabilized power supply device as a control power source for an engine control device as in the past. Alternatively, an arbitrary automatic control method is provided without requiring an independent control power source battery and without providing a plurality of engine control devices.

According to the law, control power for the engine started earlier is supplied from the battery of the engine started later, and when the engine started earlier finishes starting, the power supply from the battery of the engine started later is cut off, and the battery voltage of the engine started earlier is reduced. After a certain period of recovery time has elapsed, the control power source for the late-starting engine is switched to and supplied to the battery of the first-starting engine, and the second invention is based on the first invention, and includes, before starting the engine, a start command circuit: First Bur detection circuit.

The reason is that it is possible to stop the operation of electrical equipment.

An embodiment of the present invention will be described in detail below with reference to FIGS. 4 to 6.

FIG. 4(a) and FIG. 4 are diagrams showing the electric circuit of the automatic engine control device according to the method (l:0 is continuous on the left and right, no firing), and FIG. Items with the same reference numerals represent the same item.

The automatic engine control device 1 is composed of a control power supply switching section A' and a control power supply switching section A'.

4 generators EGG, BG,, BG8. EG, are the batteries BT, BT, BT3, respectively.
．． BT is provided, and the battery BT is connected to the wiring B.
,. l Bll l Elo * E,, control power supply switching unit A/K is connected, battery 13 TsiJ wiring B
, 3°B141'''181 Connected to the control power supply switching section A' at B14.

The control power switching unit A/ includes a start/stop switch 3 EG, a stop relay contact sXk>1 (hereinafter referred to as a contact), and a start relay 6. Timer BT, timer contact s Ta, auxiliary relay 8
X, same contact 8 X a, l 8 X a, T 8 X
b, I instantaneous excitation type mechanically held relay 8-12. 8
-34 (hereinafter referred to as relay), contact 8-12a,...
8-12blI8-34a118-34b, l startup success relay contact 14 12a+, 14 12k) 1,14
34k) 1+ 14-34 b, (hereinafter referred to as contact)
, cold engine operation timer contact 5Tb (hereinafter referred to as contact) is arranged for #1lll to 1 engine start command section B', block release switch 3-86R, contact 5X b2. Starting relay contact 6a (hereinafter referred to as contact), contact 14t) 1+ 14
bt, 14k) 3+ 14 ba v 14 12 b
2 + 14' 34 bs *Contact 8-12a2+
8 12a3+ 8 12a4+ 8 34a2* 8
-34a8, 8-34aB traffic jam detection relay 48. Contact 4
B? L? Traffic jam auxiliary relay 48X, contact 48X ia+
48Xb, starting relay 88MX, starting relay contact 8
sMXa, 8 sMXa! ,88MXa8,88MXa
4 (hereinafter referred to as contact) is wired B+t + E12@2
0 to 43 are connected.

The engine start detection section C' has a start success relay 14-12.
s14 34 (hereinafter referred to as relay) p contact 14a++
14a2+ 14a3+ 14a4 wiring Bn + B
,, .

44 to 47 are connected.

Engine stop part D' includes cold engine operation timer 5TI timer contact 5Ta, stop relay 5X, contact 5
ari 5 X asl 5 X 1a4 + contact 6b
, contact 14-12at+ 14-34a+stop auxiliary relay contact 5Z11 341 35.381 39.421
43, and contact 861 to the engine start detection section C'.
8@ + 87 r Wire Sgt B12* 44y
44t 45+ 'B12t46+ 46+47
Connect with 81+18101 to engine stop part D'.
Sll l st! Wiring 52, 53, 55, 56, 5
It is connected at 8°59.61.62.

Therefore, to explain how to operate it, there are four generators B GI, EG2, EGs * Circle F' is the first generator EG, EG2 and the second generator HG31 El.
Divided into two sets, each battery switch B
S.

Turn BS, , BS, , BS, ON.

First of all, relay 8-34 glue "Rotz na gcoil 8-34C"
C is excited, and the contact 8-34a of the control power switching section A',
+ Contact point 8-34a2.8-3 of engine start command section B'
4a3 + 8 34 a4 turns on, control power switching unit A'1ll17) contact 8-34b turns off,
Wiring B14 and wiring Blt are connected to wiring E14 and wiring E8. are connected to the engine control device 1'! Power is supplied from the batch IJBT.

Next, when the switch 3EG is turned ON, the starting relay 6 is excited, the contact 6b of the engine stop section D' is turned OFF, and the contact 6a of the engine start detection section B' is turned ON. The starting relay 88MX is energized for a certain period of time, and the contacts 88MXa, , 88 MXa, t 88 MX
a3+ 88 MX a4 power, generator E
G, EGt contacts 8-12a, 8-12a, 1 are O
Since the generators are FF, a start command is issued only to generators BG, BG2.

When the generators EG, EG2 are successfully started, the contact 14al
+ , 1 a-at is ONL, contact 14 b, , , +
4 btt: tOFF, the III electric appliance 14-12 of the engine start detection section C' is excited, and the control power supply switching section A' is turned off.
Contact 14-12 b is OFF, contact 14-12 a
, is ON, contact 14-12 of engine start command section B'
b, is OI'' F, contact 14-1 of engine stop part D'
2 a, power ON L4, battery BTI timer 8T
, auxiliary relay 8X is energized, contacts 8XaI, 8Xa2
is turned on. The contact 8Xa is provided for self-holding of the relay 8X in order to stably switch the power supply.

When contact 8Xa is turned on, reset coil 8-34RC of relay 8-34 is excited, contact 8-34b is turned on, and contacts 8-'34a to 8-34a4 are turned off.
];' L, arrangement Fl14 (!l-wiring 13+t
l Arrangement E, , 'T' mE,, is turned OFF, and the engine start command part B/, the engine start detection part C', and the engine stop part D'
power is cut off. Next, after the timer 8T counts a certain period of time (approximately 5 seconds) for the battery voltage of the batch IJB T to recover, the contact 8Ta turns ON, and the closing coil 8-12CC of the relay 8-12 is energized.
Contacts 8-12a1 to 8-12a are turned on, and wiring B
0. Wiring E11 and Wiring B (2) are connected, and the control power source is switched from battery B T to batch IJ HT.0 Generators EOs and EG The starting command is from the aforementioned generator EG,
, E Same as G2, engine start command section B'
An explanation of the congestion caused by starting the engine will be omitted.

When the generators BG, EG4 are successfully started, the contact 14a3
+14 a4 is ON, relay 14-34 is energized, contact 14-34a is ON, contact 14bx+14b4
* 14-34 b++ 14' 34b2+ l
4 34b3 is turned off, the power supply to the intermittent relay 66 is turned off, and the engine start command is thereafter cut off.10,000, the timer 8T and the auxiliary relay 8X are demagnetized, and the contact 8Xb is turned off.

ONL, contact 8 T a + 8 X J +
8X? L2 turns OFF.

Next, the operation for stopping the engine will be explained.

When the switch aEG is set to OF1', the relay 6 is demagnetized, the contact 6a is activated OF1, and the contact -6b is turned on.

Since the contacts 14-12at and 14-34a are turned on, the cold machine operation timer 5T is energized for a certain period of time (approximately 6
After cold operation (for 0 seconds), al'R& is α'RR, contact sTa is ONL, stop relay 5X is energized and contact 5X b is turned off)', contact 5X a to sX
Turn on a4 to energize the stop solenoids of generators EG and EG4 for a certain period of time [7 to cut the fuel.

As the engine speed decreases, contact 14a.

乃"A 14 a, KA OF F-2, relay 14-1
2.14-34 is demagnetized, contacts 14-12b, 1412by, 14b, 14b4114 34bl
~14-34 b3 is ON, 9 points 14-12a, 1
4-12a2.14-34a is OFF F l, cold operation timer 5T is demagnetized, contact 5Tb is ON, contact 5
TaVi is turned off, but the stop solenoid is energized until the engine is completely stopped (about 30 seconds).
After that, when demagnetized, the contacts 5Za to 5Za4 are turned OFF, and the relay 5X is demagnetized. 12 reset coils 8-12R,C
is energized, and contacts 8-12a to 8-12a.

is OFF, contact 8-12b is turned ON, 8-34CC is excited in the closing coil of relay 8-34, and contact 8-34b is turned 01")' L,, contact 8-34 &, 8-34a to 8-34a, 1 ONlc, and the control power source for the automatic engine control device 1' is switched from the battery BT to the batch!jBT after the engine has completely stopped.
, can be switched to .

Operation cutout switch 43EG is for four generators EG
,, EG,, EG,, A stop circuit for stopping the operation of any one of the EG4, the contact S,...
S? The modes of SI2 to SI2 are as shown in FIG.
4 generators EG,, EG2. When operating all EG, EG4, as shown in Figure 4 (contacts Sl to S4
゜SQ to Srt are ON, contacts Sl to S are OFF F
It becomes.

For example, when stopping the operation of generator EQ, specifying the No. 1 operation cutout switch 43EG turns contacts S, , S, OFF and contacts S, ON. In this state, if the start/stop switch 3EC3 is turned ON, the contact point S of the engine start command section B' becomes OI"F-
Since the engine is closed, no starting command is issued to the generator EQ.

If the generator E is successfully started, the relay 14-12 is energized and the control power supply is turned on as described above, since the contact S is ON even if there is no successful start command from the generator EG. It is possible to switch υ, and in case of engine stop, contact s
Even if Xa is turned on, contact S is 0 and FF, so a stop command is cut off to generator EG.

When the present invention operates the generator RL device as a regular power source,
When operating as an emergency power source, it is possible in either case, and the number of units operated in parallel is 1. The engine starting order, the number of out-of-operation vehicles, etc. are not limited to this embodiment.

As is clear from the above explanation, when this method is implemented, it is not necessary to provide a stabilized power supply device or other independent battery as the control power source of the engine control device as in the past, and it is possible to use multiple batteries with one engine control device. It is possible to control the engines of several generators, and it is also possible to stop the operation of any generator, which has advantages such as easy operation and operation.

An explanatory diagram of the control device, Figures 2 and 3 are explanatory diagrams showing the relationship between engine speed and battery voltage, and Figures 4 (a) and (
b) is a continuous electrical circuit diagram of the automatic engine control device according to the present invention; FIG. 5 is a mode diagram of the operation cut-out switch; OA' is a control power switching unit;
is the engine start command section, C' is the engine start detection section, D
' is the engine stop part, 1' is the engine automatic control device, 3
BG is a start/stop switch, 3-86R is a block release switch, 5T is a timer for cold machine operation, 5Ta, s'rb are tie-q contacts for cold machine operation, 5X is a stop relay, 5 X a, to 5 X a4+5Xb, , 5Xb is a stop relay contact, 5z is a stop auxiliary relay, 5 Z a to 5 Z a
4 is a stop auxiliary relay contact, 6 is a starting relay, 6a, 6b
is the starting relay contact, 8T is the timer, 8Ta is the timer contact, 8X is the auxiliary relay, 8 X a, l 8 X a2
+ 8 X b+ is auxiliary relay contact, 8-12.8-
34 is an instantaneous excitation type mechanically held relay, 8-12 a to 8-12a4, 8-12b, 58-34a to 8-
34a4+8-34b, same contact as above, 14-12.14
-34 is the first successful start? 34a, 14 contacts, 48 is a traffic jam detection relay, 48a is a contact as above, 48X is a traffic jam auxiliary relay, 4sXa+4"sxb is a contact as above, 66 is an intermittent relay, 88MX is a starting relay, SI to S12 is an operation cutout switch contact.

Australia 2 map An hour Boat 3 −Ginja

Claims (1)

[Claims] 1. In a method for controlling parallel operation of a plurality of diesel generators, the control power of the engine to be started first is supplied from the battery of the engine to be started later, and when the earlier started engine has finished starting, The power supply from the battery of the engine to be started is cut off, and after a certain period of time has elapsed for the battery voltage of the earlier started engine to recover, the control power for the later started engine is switched and supplied to the battery of the earlier started engine. Automatic engine control method for parallel operating diesel generators. 2. In the method of controlling multiple diesel generators in parallel operation, before starting the engine, operate the operation cut-out switch that cuts off the start command circuit, start detection circuit, and engine stop command circuit all at once, The generator is stopped, the control power for the engine to be started earlier is supplied from the battery of the engine to be started later, and when the engine started earlier has finished starting, the power supply from the battery to the engine to be started later is cut off. , an automatic engine control method for a parallel-operated diesel generator, characterized in that after a certain period of time has elapsed for pressure to recover in the batch IJ of the earlier-started engine, the control power source for the later-started engine is switched to the battery of the earlier-started engine and supplied. .