Control over integral ship electric power system (ieps)

FIELD: power engineering.

SUBSTANCE: data on the state and IEPS parameters and that on screw propeller drive and other consumers and ship navigation conditions are processed to calculate forecast load variation. Starting including forestalling, outage and actuation for parallel operation of generators are controlled with die allowance for their required quantity sufficient for supporting of IEPS operation, ship motion control parameters and navigation conditions. Minor consumers ON/OFF control is executed to ensure the efficient operation of generator units and higher quality of supply voltage. Dynamics of acceleration and deceleration of screw propeller and its drive is controlled subject to ship motion, navigation conditions, current and forecast electric power and quality parameters. Dynamics of turn of steering house, if any, is controlled depending on generated and forecast power of generator units.

EFFECT: fuel savings, fast response and manoeuvrability, higher energy quality.

1 dwg

 

The invention relates to the unified power system (EAS) ships with elektrodvizheniem and is intended for use on boats, marine mobile objects and other vehicles.

Known automatic control system marine engine that contains the microprocessor, the output of which is connected to the input of the body of the throttle (see patent Germany N 3827884, CL F02D 9/08, 1990).

The disadvantage of this system is the use of the method of control without regard to the sailing conditions and forecast load change while maneuvering, as well as lack of control actions on complex equipment, including the power plant, propulsion and steering complex and other equipment of the vessel.

Closest to the technical nature of the invention and is selected as a prototype management system is a power system of the ship [UDC 629.12.681.518. Management of reserve electric power aircraft carrying ships. Nakhimov OA, Shilov J.K. // control Systems and information processing: Nauch.-technology. collection/FSPC "Avrora". SPb, - 2005 - VIP - P.50-60]. The prototype is a system of management reserve capacity of the ship power plant in nominal operation modes of the ship. Level value of the power consumption is reduced by disabling federn the x switches. In the management of reserve power signals are used on warning deviation of the quality of electric power and thermal parameters of the state of generator units.

The disadvantages of the method of control implemented this control system are: ensuring optimal fuel consumption operation of the electric power system (EPS) only in the basic design modes of operation of the vessel, control without taking into account the parameters of the motion of the ship and the sailing conditions, the management of EPS on the actual power consumption without forecast of its changes, resulting in increased fuel consumption and reduced maneuverability of the vessel.

The present invention will allow for the possibility of optimal control LES vessel with elektrodvizheniem by the criterion of minimal fuel consumption for all modes of operation of the electric power system of the ship based on the quality of transient processes in electrical power system, as well as on the criterion maneuverability of the vessel as a whole.

This is achieved by the following:

1. The choice of the generator set to start (stop) and determining the time to start proactively depending on the parameters of the motion of the ship and the sailing conditions. The maximum effect is achieved when used in marine power plants in the most appropriate what about the number of generating units of different capacities to provide more combinations of their joint work, that will provide the primary engines in the area of optimal fuel consumption for a larger number of load modes.

2. Control start, stop and switch for parallel operation of generating units within the parameters of the motion control of the ship and its voyage.

3. Dynamics control the reversal of the propulsion and steering column (DRC) based on the generated and projected power generator sets (for vessels with DRC).

4. The control of turning on and off unimportant consumers to ensure the most economical operation of the generator units and the best quality of the supply voltage.

5. Dynamics control acceleration and deceleration of the propeller drive and its power depending on the parameters of motion of a ship, sailing conditions, current, projected power and power quality parameters.

The technical result obtained by carrying out the invention, is that resulting from the use of this method of control in the work will only be generating units, the number of which is sufficient to ensure operation mode of the power system, the system will operate in the mode of minimum fuel consumption. In addition, increased Bystrom the op perate control and maneuverability of the vessel as a whole, through proactive management of the generated power, and will be minimized abrupt changes of modes of operation of the electricity system that will improve power quality.

The invention is illustrated by scheme, in which figure 1 shows a functional diagram of the control system LES.

LES consists of the power plant 1, which comprises generating units (generators) 2, the main switchboard 3 generator 4, the feeder 5 and section 6 switches, electricity consumers 7, including propeller drive, providing the desired rotational speed of propulsion of the complex 8. The control system of the unified power system 10 consists of a processing unit 9 on the status and parameters of power system, propeller drive and other consumers 7, the control unit 11 of the power plant 1, the propeller drive and consumers 7 and the calculation unit 12. The propulsion control and monitoring of parameters of the motion of the ship is carried out by the control system 13 by the movement and maneuvering of the ship.

The control system of the unified power system 10 operates as follows. When the control system 13 for driving and maneuvering a vessel defining influence on the change of the driving mode from the bottom, for example, changing the angle of the hinge rudder propulsion complex 8, as well as when changing the sailing conditions (wind direction, intensity, excitement, etc.), from the control system 13 receives the signal, which characterizes the change in the calculation module 12. In the calculation unit 12 calculates projected changes in load power system taking into account other characteristics of maneuvering, continuously received from the control system 13, which receives signals from the propulsion complex 8, as well as the current state of the power system, coming from the processing unit 9, which receives the values of the parameters of ship stations 1 and consumers 7. According to the results of the calculation in the control unit 11 from the calculation unit 12 receives the design data necessary for optimal management of the electricity system, namely the predicted time change and the trajectory of the power consumption, its value and the duration of the corresponding mode. In the control unit 11 are defined:

- number generator units 2 for inclusion in the work;

- number generator units 2 for exclusion from work;

- the start time of the respective generating units 2;

numbers and time switchable consumers e is extraenergy 7;

- trajectory changes the rotational speed of the propeller motor propeller drive 7;

- limiting the power of the propeller motors propeller drive 7;

- the turning speed propulsion and steering column (DRC) propulsion complex 8.

The control unit 11, in accordance with the algorithm of optimal control, generates control actions:

- inclusion of generator 2, through the inclusion of generator 4 and section 6 switches;

- disable the generator 2, through the inclusion of generator 4 and section 6 switches;

connection and disconnection of secondary consumers 7, by switching on and off the feeder 5 switches;

the task of the trajectory of change of frequency of rotation of the propeller motors propeller drive 7.

The control system of the unified power system 10, in accordance with the algorithm of optimal control, generates control actions on the speed of the reversal of the DRC propulsion complex 8.

Thus, when using this method of control is provided to minimize fuel consumption, depending on the modes of motion of the vessel and sailing conditions, increases the maneuverability of the vessel as a whole, and also reduces the number of sharp changes in the work of the unified power system, resulting in improved power quality.

The method of controlling the ship of the unified power system, consisting in the implementation of coordinated control elements of the unified power system during operation, characterized in that
process status information and parameters of power system, propeller drive and other consumers, the parameters control the motion of the ship and its voyage,
according to the received information to produce the predicted load change,
in accordance with the following calculations:
manage startup, including proactive, stopping and turning on the parallel operation of generator units, depending on the required amount sufficient to provide a mode of operation of the electricity system, the parameters of the motion control of the ship and its voyage,
manage enabling and disabling secondary consumers to ensure the most economical operation of the generator units and the best quality of the supply voltage,
manage the dynamics of acceleration and deceleration of the propeller drive and its power depending on the parameters of motion of a ship, sailing conditions, is of ECUSA, projected capacity and power quality parameters,
manage the dynamics of the reversal of the propulsion and steering column, if present on the ship depending on the generated and projected capacity of generating units.



 

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