JPS6313894A - Electrically propelled ship with propelling load estimating arithmetic unit - Google Patents

Abstract

PURPOSE:To carry out the smooth operation of a propelling device by providing an arithmetic unit for feeding an estimated propelling load signal corresponding to the indicated propeller blade angle to a load control device, and estimating a propelling load at the time of varying a propeller blade angle and carrying out the control of the load of a generator. CONSTITUTION:An indicated propeller blade angle signal thetav from a ship speed handle 19 is inputted into an electric propelling device while also into an arithmetic unit 18. And, a load power to electric equipment 7 is detected and its signal Psk is also inputted into the arithmetic unit 18. An arithmetic part 8 substitutes the indicated propeller blade angle signal thetav for a relation expression read from a memory part 20 in which the relation expression between a propeller blade angle and a propelling load power at the time of steady-state straight advancing navigation is previously set, to estimatingly operate a propelling load power. And, the sum of this signal and the detected signal Psk is outputted to a load control device 6 as an estimated total load signal Pyg, to control the output of a generator 5. Accordingly, since the propelling load is estimated at the time of varyingly controlling the propeller blade angle controlling the load of the generator, the power feeding quantity to a propelling device can be carefully controlled.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to an electric propulsion ship equipped with an electric propulsion device, and particularly to an electric propulsion ship equipped with an arithmetic device capable of estimating the propulsion load in the electric propulsion device. Controllable pitch propeller type (CCP)
) related to electric propulsion ships.

[Conventional technology]

Generally, a variable pitch propeller type electric propulsion ship is equipped with an electric propulsion device, and a generator is connected to the electric propulsion device.

This starting 7Jl rock feeds power to the electric propulsion device in accordance with the propulsion load on the electric propulsion device, and the start-up and the like are controlled by a load control device.

Note that a ship may be equipped with a large number of electric devices in addition to the electric propulsion device described above. Therefore, the power supply corresponding to the onboard electrical load of each device may be performed by the above-mentioned generator, or a plurality of generators other than the above-mentioned generator may be provided.

When a plurality of generators are provided in this manner, an operating number control device is provided that controls the number of operating generators in accordance with the above-mentioned propulsion load and onboard electrical load.

In the above-mentioned variable bi-propeller type electric propulsion ship, when changing and controlling the propeller blade angle, a control signal for changing the propeller blade angle is sent from the cockpit to the electric propulsion device. Then, based on the control signal, the electric propulsion device is operated to perform control to change the propeller blade angle to a predetermined propeller blade angle.

[Problem that the invention seeks to solve]

By the way, in such an electric propulsion ship, for example, if the propeller blade angle of the electric propulsion device is increased, the propulsion load on the electric propulsion device increases, so the amount of power supplied from the generator to the electric propulsion device increases. In order to increase this, it is necessary to control the generator with a load control device.

However, in conventional electric propulsion ships, the above-mentioned generator control is performed after actually detecting the propulsion load in the electric propulsion system, so the amount of power generated by the generator increases. If power cannot be supplied smoothly, there is a risk that the lack of electric power will cause problems not only in the electric propulsion system but also in the operation of electric equipment inside the ship.

Further, when the propeller blade angle of the electric propulsion device is reduced, it is necessary to reduce the amount of electric power of the generator. in this case,
Although the above-mentioned shortage of electric power does not occur, surplus electric power is generated until the electric power of the generator is reduced, which is undesirable from the point of view of energy saving and economic efficiency.

The present invention attempts to solve these problems by estimating the propulsion load associated with changing control of the propeller blade angle, and
Based on this estimated propulsion load, the propeller blade angle can be changed and the generator load controlled almost simultaneously, allowing the propulsion system to operate without any problems and enabling economical operation. The purpose is to provide an electric propulsion vessel with equipment.

[Means for solving problems]

Therefore, the electric propulsion ship with a calculation device for propulsive load estimation of the present invention has an electric propulsion device including a variable pitch propeller installed on the ship and an electric motor for driving the propeller, and In an electric propulsion ship equipped with a generator capable of supplying power to the electric propulsion device in accordance with the propulsion load, and a load control device for the generator, the estimated propulsion load corresponding to the propeller blade angle is instructed to the load control device. A calculation device that supplies the signal is provided, and the calculation device has a storage unit that stores a relational expression between the propeller blade angle and the propulsion load, and a calculation that estimates the propulsion load by substituting the instructed propeller blade angle into the above relational expression. It is characterized by being composed of two parts.

[For production]

In the above-mentioned electric propulsion ship equipped with a calculation device for propulsive load estimation of the present invention, when changing the propeller blade angle, the command propeller blade angle is input to the calculation device, and the calculation unit of the calculation device calculates the command propeller blade angle. , is substituted into the relational expression stored in the storage unit, and the propulsion load is calculated and estimated.

Then, an estimated propulsion load signal corresponding to the calculated indicated propeller blade angle is output from the calculation device to the load control device of the generator, and the load control device feeds power from the generator to the electric propulsion device. Amount controlled.

〔Example〕

Hereinafter, an electric propulsion ship equipped with a calculation device for propulsive load estimation as an embodiment of the present invention will be explained with reference to the drawings.
Figure S1 is a schematic diagram showing the overall configuration, and Figure 2 is a graph showing the relationship between the designated propeller blade angle and the propulsion load power (or current).

As shown in FIG. 1, the electric propulsion boat according to this embodiment is equipped with an electric propulsion device, and this electric propulsion device includes a variable pitch propeller 1 and a variable pitch propeller 1 for driving the propeller 1. Multiple electric propulsion fi (M,...,Mm)
3 and a reduction gear (or constant velocity gear) 2.

The variable pitch propeller 1 and the reduction gear 2 are connected by a propeller shaft 9, and a clutch 10 is interposed between the reduction gear 2 and each electric motor W13. In addition, each 'l*R3 is a protection device (l! disconnection) 12
It is connected to the bus bar 4 by an electric wire 11 interposed therebetween.

On the other hand, a plurality of generators (G1.G2.・=,
Gn) 5 are connected by electric wires 13 each having a protective device r11 (breaker) 14 interposed therebetween. These power generators 1f15 are connected to a load control device (or a device for controlling the number of operating units) 6, and the output of the generator 5 is controlled by the load control device 5&6.

In addition, there are various electric types 8! on board as onboard loads. A vessel (Z3, 22-..., Zl>1 is provided,
These electric devices 7 are also safe! If! ! (breaker) 1
It is connected to the bus bar 4 by a wire #i15 with a wire #6 interposed therebetween.

Further, the reduction gear 2° clutch 10 and electric motor 3 in the electric propulsion system are connected to a boat speed handle 19 in the cockpit, and are controlled based on an instruction propeller blade angle signal ev from the boat speed handle 19. ing.

By the way, the instruction propeller blade angle signal ev from the ship speed handle 19 is input to the electric propulsion system, and at the same time,
Arithmetic device! 18. In addition, a load detector 17 is attached to each electric device #i15, and this load detector 17 detects the load power (or current) of the electric device 7.
is detected, and its detection signal Psk (k=1.2,
..., &) are also input to the arithmetic unit 18.

This calculation section! ! Reference numeral 18 includes a calculation unit 8 and a storage unit 20, and the storage unit 20 stores in advance a relational expression between the propeller blade angle and the propulsion load power (or current) as the propulsion load when the ship is traveling straight ahead. has been done.

Further, in the calculation unit 8, the command propeller blade angle signal θV inputted from one boat speed handle is substituted into the relational expression retrieved from the storage unit 20, and the propulsion load power is estimated and calculated. Then, the detection signal Ps from the load detector 17
The sum of k (k = 1.2, . . . , i') and the estimated propulsion load power signal PyI11 is determined, and this sum is used as the estimated total load power (or current) signal pyg for the 14 aircraft.
The load power m is outputted to the device (or device for controlling the number of operating units) 6, and the output of the generator 5 is controlled by the load control device 6 based on the signal pyg.

Since the electric propulsion ship equipped with a calculation device for propulsive load estimation as an embodiment of the present invention is configured as described above, when the ship speed handle 19 is turned to control the propeller blade angle change, the designated propeller The blade angle signal θV is output to the electric propulsion device and at the same time, it is also output to the arithmetic unit 18.

Then, in the calculation unit 8 of the arithmetic unit 18, the commanded propeller blade angle signal 9v is substituted into the relational expression [Py = f(ev)] stored in advance in the storage unit 201. The corresponding estimated propulsion load power signal Pya
+ is calculated. Here, the above relational expression f(eV) is generally as follows.

Pym=f(9v)=A −l□vl”+c ・
・ ・ (1) However, is a power number of about 1 to 4, A
, C is an arbitrary constant, and the indicated propeller blade angle signal 9v is
The forward direction is positive and the backward direction is negative (-90°≦9v≦
90°).

Further, its schematic characteristics are shown in FIG.

On the other hand, the load power (or current) of the electrical equipment 7 as the onboard load is detected by the load detector 17, and the load power signal Psk (k= 1, 2, . . . ) is detected by the load detector 17.

1) is input to the arithmetic unit 18. Then, in the calculation unit 8, the inboard load power (or current) signal Ps
is calculated as follows.

Ps=Σ Psk (2) -1 Here, l is the total number of electrical devices 7 on board.

Furthermore, performance! , in section 8, the sum of the estimated propulsion load power signal Pyn+ obtained by equations (1) and (2) and the onboard load power signal Ps is obtained, and the sum is the estimated total load power (or current) signal. Pyg(=Pya++
Ps) is output to the load control device of the generator 5 (or the operating number control device f6).

Then, the load control device (!6 is the estimated total load power signal py
Based on the load power signal pyg, the load of the power generator 8!5 is controlled so as to generate the amount of power according to the load power signal pyg. Furthermore, when a plurality of power generation fi5s are provided, the number of power generators 5 may be controlled by an operating number control device to adjust the amount of power.

Note that when the electric equipment 7 as an onboard load is not provided or when the electric equipment 7 receives power from a generator different from the electric propulsion system, the calculation unit 8 of the calculation unit 18 calculates (1). ) Estimated propulsion load power signal Pym based on formula
The signal Pym is input to the load control device (or the number of operating units control device fi 6).

In this way, according to this embodiment, when the propeller blade angle is controlled to change, simultaneously with this change control, the arithmetic unit 1
At step 8, an estimated propulsion load power signal Pya+ corresponding to the commanded propeller blade angle signal J::fev is estimated.

This signal Pya+ and other onboard load power signal Ps
Since the load on the generator 5 is controlled based on the estimated total load power signal pyg obtained from the sum of the ! It will now be done in real time.

Therefore, for example, during speed increase control, the electric power supply 1 from the generator 5 increases according to the amount of speed increase, so the electric propulsion system operates without any problem, and during deceleration control, power is generated according to the amount of deceleration. Since the amount of power supplied from aircraft 5 is reduced, no surplus power is generated, and economical operation can be performed.

In particular, when there are a large number of generators 8!5, more economical operation can be achieved by optimizing the number of units in operation so that each unit shares the load at a load factor that maximizes generator engine efficiency. It becomes like this.

〔Effect of the invention〕

As described in detail above, according to the electric propulsion ship with a calculation device for propulsive load estimation of the present invention, the electric propulsion device includes a variable pitch propeller installed on the ship and an electric motor for driving the propeller; a generator capable of supplying power to the electric propulsion device in response to the propulsion load on the electric propulsion device;
In an electric propulsion ship equipped with a load control device for the generator, a calculation device is provided that supplies an estimated propulsion load signal corresponding to the instructed propeller blade angle to the load control device, and the calculation device is configured to calculate the propeller blade angle and A storage unit that stores a relational expression with the propulsion load, and an operation I1 that estimates the propulsion load by substituting the indicated propeller blade angle into the above relational expression. As the propeller blade angle is controlled to change, the propulsion load is estimated, and the load on the generator is controlled based on the propulsion load, thereby finely controlling the amount of power supplied to the electric propulsion system. is,
The electric propulsion device can be operated without any problems and economically.

[Brief explanation of the drawing]

Figure 1.2 shows an electric propulsion ship equipped with a calculation device for propulsive load estimation as an embodiment of the present invention, Figure 1 is a schematic diagram showing its overall configuration, and Figure 2 shows the indicated propeller blade angle. It is a graph showing the relationship with propulsion load power (or current). 1. Variable pitch propeller, 2. Reduction gear (or constant velocity ear), 3. Propulsion electric motor (M1...Mm), 4. Bus bar, 5. Generator (Gl- G2-
..., Gn), 6.. Load control device (or device for controlling the number of operating units), 7.. Electrical equipment as onboard load (Z,
. Z 24..., 2J), 8... Arithmetic unit, 9... Propeller shaft, 10... Clutch, 11... Electric wire, 12...
・Protective device (breaker), 13... Electric wire, 14... Protective device (breaker), 15... Electric wire, 16... Protective device (breaker), 17... Load inspection device, 18... Arithmetic device , 19・
・Ship speed handle, 20...Memory section.

Claims (1)

[Claims] An electric propulsion device comprising a variable pitch propeller installed on a ship and an electric motor for driving the propeller, and a generator capable of supplying power to the electric propulsion device in response to the propulsion load on the electric propulsion device. In an electric propulsion ship equipped with a load control device for the generator, a calculation device is provided that supplies an estimated propulsion load signal corresponding to the instructed propeller blade angle to the load control device, and the calculation device is configured to calculate the propeller blade angle. and a propulsion load, and a calculation section that estimates the propulsion load by substituting the indicated propeller blade angle into the relational expression. Electric propulsion ship with computing equipment.