JPS62221825A - Automatic operation controller - 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 [Field of Industrial Application] The present invention relates to an automatic operation control device applied to power generation equipment for ships, for example, and in particular to a main shaft drive power generation/electric [/ This invention relates to improvements in means for enabling optimal energy-saving operation of exhaust eco-turbo generators.

[Conventional technology]

Conventionally, in ships equipped with power generation equipment such as a main shaft drive 1, an electric motor, an exhaust eco-turbo generator, and a diesel generator, parallel operation of the generators is performed using any combination of the above generators. There are many cases. The load sharing method adopted in such a case is either a simple proportional distribution method according to the generator capacity ratio or an overflow distribution method that is set to be unbalanced in advance.

FIG. 3 is a block diagram showing the configuration of an automatic driving control device that employs a conventional load sharing method.

In FIG. 3, 1 is a main shaft drive generator/electric motor, 2 is an exhaust eco-turbo generator, and 3 is a diesel generator. The main shaft drive generator/electric motor 1 is the main engine (diesel engine) 4
Rotationally driven by. The exhaust eco-turbo generator 2 includes an exhaust gas economizer/steam drum 5. connected to the main TA4. It is rotationally driven by a steam turbine 7 which is rotated by exhaust gas supplied through a valve 6 whose opening and closing are controlled by a control signal from a controller 10 .

Diesel power generation! 13 is rotationally driven by a diesel engine 9 whose operation is controlled by a governor 8 which operates in response to commands from the controller 1.

A control panel 11 as a governor is provided at the output end of the main shaft drive generator/motor 1. The output of the main shaft drive generator/motor 1 is controlled by the control panel 11. Current transformer 12a, breaker 13a
It is supplied to the main bus 14 via. The output of the exhaust eco-turbo generator 2 is supplied to the raw mother 1i114 via a current transformer 12b and a breaker 13b. The output of the diesel generator 3 is transmitted to the main bus 1 via a current transformer 12C and a breaker 13c.
4. 15a to 15c are the current transformers 12a to 15c.
This is an output oscillator for sending each detection output of 12c to the controller 10. Reference numerals 168 to 16G are auxiliary contacts that send the operating status of each of the breakers 13a to 13c to the controller 10. A frequency converter 17 converts the frequency of the main bus and sends it to the controller 10.

[Problems that the invention attempts to solve]

The load sharing method in the conventional device described above is such that a load sharing signal is issued based only on the output and bus frequency of each generator. Also, only proportional distribution control or overflow distribution control is possible. Therefore, the above-mentioned conventional system is a control system that cannot be said to be optimal for the side bottom from the viewpoint of energy saving measures.

Therefore, the present invention provides automatic load sharing during generator parallel operation based on boiler drum steam pressure, bus bar frequency, diesel generator minimum required load (<30%), etc.

The purpose of this project is to provide an automatic operation control device that can realize optimal energy-saving operation while maintaining safe operation of each plant in power generation facilities equipped with exhaust eco-turbo generators, etc., no matter how many generators are operated in parallel. do.

[Means for solving problems]

In order to solve the above-mentioned problems and achieve the object, the present invention takes the following measures.

(2) Detecting whether the turbo generator is operated by main engine exhaust gas energy or by boiler reheating.

(2) If this detection means detects that the former is the cause, the operation is controlled to maintain the boiler steam pressure at a constant value and recover the main engine exhaust gas energy to the maximum extent possible.

(2) If the detection means detects that the latter is the cause, the main shaft drive generator/motor alone or the main shaft drive generator/motor and the diesel generator are preferentially used in parallel for operational control.

(2) When operating the main shaft drive generator/motor and the diesel generator in parallel, satisfy the minimum required load of the diesel generator in advance.

In other words, conventional load sharing methods issue load sharing signals based only on the output of each generator and the bus frequency;
In the present invention, boiler drum steam pressure is added as a control reference. In addition, conventional load sharing methods were only capable of proportional distribution control or overflow distribution control, but in the case of the optimal energy-saving operation device according to the present invention, load sharing control that is considered to be optimal when various generators are operated in parallel is possible. I made it possible.

[Effect]

■ Main shaft drive power generation/electric motor - Exhaust eco-turbo generator During parallel operation For the exhaust eco-turbo generator, the governor (II speed machine) is driven to keep the boiler drum steam pressure at an arbitrary constant value, and the main engine exhaust gas energy is maximized. A limited recovery will be made. At this time, the main shaft drive generator/generator is operated as a generator or an electric motor depending on the difference between the output of the exhaust eco-turbo generator and the onboard power demand.

In other words, if the output of the exhaust eco-turbo generator is lower than the power demand on board, the main shaft drive generator makes up for the shortage, and if it exceeds it, then the surplus is returned to the main shaft by the main shaft drive generator, resulting in supplementary operation. ). At the same time, the governor of the main shaft drive generator/motor is controlled based on the bus frequency. That is, when the bus frequency increases, the governor is controlled in a lowering direction, and when it is lowered, the governor is controlled in an upward direction to keep the bus frequency constant.

■ When the main shaft drive power generator/motor - turbo generator (boiler reheating) parallel operation When the boiler is reheated in item 0 above, the main shaft drive power generator/motor functions as a generator to the maximum extent possible, and matches the onboard power demand. The turbo generator is automatically controlled to compensate for the shortage. The reason for this is that when the boiler is reheated, the drum steam pressure increases, and if the zero-term control is maintained, the turbo generator will take the maximum load, which is against the purpose of optimal energy-saving operation. (The fuel for the boiler is more expensive than the fuel for the main engine that drives the main shaft drive generator/electric motor.)■
, Priority is given to a load of 30% of the rated output when the main shaft drive generator/electric motor and diesel generator are operated in parallel. The remaining load is taken up by the main shaft drive generator/motor within the rated range, but only in case of shortage, the diesel generator load is increased from 30%.

(2) Exhaust Eco Turbo Generator-Diesel Generator Parallel Operation Diesel Generator 1i [After applying 30% load to 1i1, it is the same as the above item 0.

■, Turbo generator (boiler additional heating) - Diesel generator When operating in parallel, due to the superiority and inferiority of fuel consumption, the short operating time, etc., a proportional distribution method according to the generator rated capacity ratio or arbitrary unloading can be used. The overflow distribution method will be used to set a balance share.

(2) Main shaft drive power generation/Electric power +1 - Turbo generator - Diesel generator During parallel operation First, the diesel generator takes 30% of the rated output in advance of the other generators to protect the engine. The remaining load is automatically shared between the main shaft drive power generator/motor and the turbo generator as described in items (1) and (2) above.

In this manner, the automatic operation control device determines which of the six modes described above will be selected depending on the parallel operation state of the generators and the boiler ignition state, and optimal energy-saving operation is performed. Optimum load sharing control is then executed based on the boiler drum steam pressure, the output of each generator, and the bus frequency.

〔Example〕

FIG. 1 is a diagram showing the configuration of an embodiment of the present invention, and FIG. 2 is a flowchart showing the operating state of the embodiment.

Note that in FIG. 1, the same parts as in FIG. 3 are given the same reference numerals, and detailed explanations are omitted.

This embodiment shows an example in which "main shaft drive generator/motor 1" and "turbo generator 2j-r diesel generator 3" are operated in parallel. In Figure 1, 21 is the boiler control panel;
22 is a pressure oscillator.

(1) The operating generator is a breaker - auxiliary contacts 16a to 16C
Judgment will be made accordingly.

(2) The governor 8 of the diesel engine 9 is controlled to maintain the load of the diesel engine 113 at 30% or more.

(3) When a large boiler point signal is output from the boiler control panel 21, that is, when the turbo generator is in operation due to boiler reheating, the difference between the onboard power demand and the load of the diesel power generator 113 described above On the other hand, first, the main shaft drive generator/motor 1 is given priority and the maximum load is applied. If there is still a shortage, the turbo generator 2 will bear the remaining load. In this way, each governor control is performed.

(4) If the boiler point large signal is not output from the boiler control panel 21, it is determined that the steam is being supplied by the exhaust gas economizer 21, and in order to keep the drum steam pressure constant, the signal from the pressure oscillator 22 is The valve 6 of the steam turbine 7 is controlled to keep the value constant. A control panel 11 serving as a governor for the main shaft drive generator/motor 1 is controlled to keep the frequency of the bus bar 14 constant.

Note that the present invention is not limited to the above embodiment,
Of course, various modifications can be made without departing from the spirit of the invention.

〔Effect of the invention〕

According to the present invention, when generators are operated in parallel, load sharing is automatically performed based on boiler drum steam pressure, bus bar frequency, diesel generator minimum required load (30%), etc. In a power generation facility equipped with an electric motor, an exhaust eco-turbo generator, etc., an automatic operation control device can be provided that can realize optimal energy-saving operation while maintaining safe operation of each plant, no matter how many generators are operated in parallel.

[Brief explanation of drawings]

FIG. 1 is a block diagram showing the configuration of an embodiment of the present invention, @
FIG. 2 is a flowchart showing the operation control state of the same embodiment, and FIG. 3 is a block diagram showing the configuration of the conventional example. 21... Boiler control panel, 22... Pressure oscillator. Applicant Sub-Agent Patent Attorney Takehiko Suzue Diagram 3 Procedural Amendment

Claims (1)

[Claims] In a device that automatically controls the operation of a power generation facility equipped with a main shaft drive generator/motor, a diesel generator, a turbo generator selectively operated using either main engine exhaust gas energy or boiler reheating, etc., the operation of the turbo generator is provided. A means for detecting whether this is done by main engine exhaust gas energy or by boiler reheating, and if the detection means detects that the former is caused by the former, the boiler steam pressure is maintained at a constant value and the main engine exhaust gas is means for controlling operation so as to recover maximum energy; and if the detection means detects that the latter is the cause, the main shaft drive generator/motor alone or the main shaft drive generator/motor and the diesel generator; means for preferentially utilizing and controlling the operation in parallel, and means for satisfying a minimum required load of the diesel generator in advance when the main shaft drive generator/motor and the diesel generator are operated in parallel. An automatic driving control device characterized by: