KR20180020459A - Engine adjustable speed direct current wiring system for independent diesel power generation system to reduce fuel and simplification system - Google Patents

Abstract

According to one embodiment of the present invention, an engine adjustable speed direct current wiring method for fuel reduction and system simplification of an independent type diesel power generation system comprises: a step of computing an electricity consumption of a load terminal; a step of controlling an intensity of alternating current power such that alternating current power set to be corresponding to the electricity consumption can be supplied to the load terminal; a step of converting the controlled alternating current power to direct current power set to be corresponding to the intensity of the alternating current power; and a step of supplying the direct current power to the load terminal.

Description

TECHNICAL FIELD [0001] The present invention relates to an engine variable speed direct current wiring system for fuel reduction and a system simplification of a standalone diesel power generation system. [0002] The present invention relates to an engine variable speed direct current (I /

The present invention relates to an engine variable-speed DC wiring system for fuel reduction and system simplification of a stand-alone diesel power generation system, and more particularly, to a variable-speed DC wiring system that can reduce power consumption by supplying variable power to a load- To a DC wiring method and system for power reduction.

When power is supplied using a diesel power generation system, the diesel engine is driven at a constant speed to supply a certain frequency and voltage to the subordinate stage regardless of the power consumption at the lower stage.

Therefore, since the engine speed is driven at the same speed irrespective of the power consumption at the lower stage, there is a problem in that it is impossible to operate according to the optimum efficiency of the engine and the generator, and unnecessary power is consumed.

In addition, since the voltage output from the generator is required to be lowered to a voltage required at the load terminal, a transformer is indispensably required, which increases the cost of the system configuration and complicates the system.

Accordingly, it is urgent to develop a system capable of supplying only necessary power to the subordinate stage in accordance with the power consumption of the subordinate stage.

[Related Technical Literature]

1. Marine diesel engine valve spindle calibration device (Patent Application No. 10-2006-0057454)

An object of the present invention is to provide an engine variable-speed direct current wiring system for reducing fuel consumption and simplifying a system of a stand-alone diesel power generation system capable of reducing power consumption by supplying alternating current power set in accordance with the power consumption of a sub- .

Another problem to be solved by the present invention is to provide a stand-alone type power supply system capable of reducing the cost and improving the efficiency of the system because there is no need to convert the alternating current power into the direct current power because the alternating- And to provide an engine variable-speed DC wiring system for fuel reduction and system simplification of a diesel power generation system.

Another problem to be solved by the present invention is to provide a stand-alone diesel generator capable of simplifying the system and reducing the cost, since a transformer is not required, and an AC / DC converter is not required for a DC part and an ESS (Energy Storage System) And to provide an engine variable-speed DC wiring system for fuel reduction and system simplification of the system.

According to an aspect of the present invention, there is provided an engine variable dc wiring method for fuel reduction and system simplification in a stand-alone diesel power generation system, the method comprising: calculating a power consumption amount at a lower stage; Controlling the intensity of the AC power so that the set AC power corresponding to the power consumption is supplied to the lower stage; Converting the controlled alternating current power into a set direct current power corresponding to the intensity of the alternating current power; And supplying DC power to the load stage.

According to another aspect of the present invention, there is provided a method of driving a plasma display panel, comprising the steps of: converting a DC power source to an AC power source when a negative end consumes AC power; And supplying the converted AC power to the lower stage.

According to still another aspect of the present invention, the method may further include the step of supplying DC power from the DC power supply to the lower stage.

In order to solve the above problems, an engine variable-speed direct current wiring system for fuel reduction and system simplification of a stand-alone diesel power generation system according to another embodiment of the present invention calculates a power consumption amount at a lower stage, A controller for controlling the intensity of the AC power so that the set AC power is supplied to the lower stage; An AC power supply unit for generating a controlled AC power under the control of the control unit; And an AFE (Active Front End) for converting the generated AC power into a predetermined DC power corresponding to the intensity of the AC power and supplying the DC power to the lower end.

According to another aspect of the present invention, there is provided an inverter circuit comprising: an inverter for converting a DC power source to an AC power source and supplying the converted AC power source to a lower stage when the lower stage consumes AC power; And a DC power supply unit for supplying DC power to the lower stage.

The present invention has an effect of reducing the power consumption by supplying the alternating current power set according to the power consumption of the lower stage to the lower stage.

Since the AC power supply to be supplied to the lower stage is converted into a DC power having a constant intensity and is supplied, there is no need to convert the AC power to the DC power, so that the cost and system efficiency can be improved.

The present invention has the effect of simplifying the system and reducing the cost since no transformer is required, no AC / DC converter is required for the lower part of the DC part and the energy storage system.

The effects according to the present invention are not limited by the contents exemplified above, and more various effects are included in the description.

1 is a block diagram illustrating an engine variable-speed direct current (DC) wiring system for fuel reduction and system simplification in a stand-alone diesel power generation system according to an embodiment of the present invention.
2 is a block diagram illustrating an engine variable-speed DC wiring system for fuel reduction and system simplification in a stand-alone diesel power generation system according to another embodiment of the present invention.
3 is a flowchart showing a sequence of an engine variable-speed DC wiring method for fuel reduction and system simplification of a stand-alone diesel power generation system according to another embodiment of the present invention.

BRIEF DESCRIPTION OF THE DRAWINGS The advantages and features of the present invention and the manner of achieving them will become apparent with reference to the embodiments described in detail below with reference to the accompanying drawings. The present invention may, however, be embodied in many different forms and should not be construed as being limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the invention to those skilled in the art. Is provided to fully convey the scope of the invention to those skilled in the art, and the invention is only defined by the scope of the claims.

Each block of the accompanying block diagrams and combinations of the steps of the flowcharts may be performed by algorithms or computer program instructions comprised of firmware, software, or hardware. These algorithms or computer program instructions may be embedded in a processor of a general purpose computer, special purpose computer, or other programmable digital signal processing device, so that the instructions that are executed by a processor of a computer or other programmable data processing apparatus Generate means for performing the functions described in each block or flowchart of the block diagram. These algorithms or computer program instructions may also be stored in a computer usable or computer readable memory capable of directing a computer or other programmable data processing apparatus to implement a function in a particular manner, It is also possible for instructions stored in a possible memory to produce a manufacturing item containing instruction means for performing the function described in each block or flowchart of each block diagram. Computer program instructions may also be stored on a computer or other programmable data processing equipment so that a series of operating steps may be performed on a computer or other programmable data processing equipment to create a computer- It is also possible that the instructions that perform the processing equipment provide the steps for executing the functions described in each block of the block diagram and at each step of the flowchart.

Also, each block or each step may represent a module, segment, or portion of code that includes one or more executable instructions for executing the specified logical function (s). It should also be noted that in some alternative embodiments, the functions mentioned in the blocks or steps may occur out of order. For example, two blocks or steps shown in succession may in fact be performed substantially concurrently, or the blocks or steps may sometimes be performed in reverse order according to the corresponding function.

Like reference numerals refer to like elements throughout the specification.

It is to be understood that each of the features of the various embodiments of the present invention may be combined or combined with each other partially or entirely and technically various interlocking and driving is possible as will be appreciated by those skilled in the art, It may be possible to cooperate with each other in association.

Various embodiments of the present invention will now be described in detail with reference to the accompanying drawings.

1 is a block diagram illustrating an engine variable-speed direct current (DC) wiring system for fuel reduction and system simplification in a stand-alone diesel power generation system according to an embodiment of the present invention. An engine variable speed DC wiring system 100 for reducing fuel and simplifying the system of a standalone diesel power generation system according to an embodiment of the present invention includes a controller 110, an AC power supply unit 120, an AFE (Active Front End) 130, , At least one inverter (141, 142, 143) and a lower stage (150).

First, the controller 110 may calculate the power consumption of the lower stage 150. Specifically, the control unit 110 is connected to the lower stage 150 to calculate the amount of power consumed in the plurality of loads 151, 152, and 153 in real time.

The AC power supply unit 120 can control the intensity of the AC power so that the set AC power corresponding to the power consumption of the lower stage 150 can be supplied to the lower stage 150. [ Specifically, the AC power supply unit 120 is controlled by the control unit 110 such that a predefined AC power corresponding to the current power consumption of the load cell 150 can be supplied to the load cell 150, The intensity can be controlled. For example, when the power consumed by the current sub-stage 150 in the control unit 110 is calculated as A [W], the AC power supply unit 120 responds to A [W] under the control of the control unit 110 The intensity of the AC power can be controlled so that the AC power of B [Vrms] defined in advance can be supplied to the loading stage 150. Here, the AC power supply unit 120 may include a diesel engine and a generator.

The AFE 130 can convert the AC power supplied from the AC power supply unit 120 into a DC power of a predetermined magnitude. Specifically, the AFE 130 may convert the AC power controlled by the AC power supply unit 120 into a predetermined DC power corresponding to the intensity of the AC power. For example, when the AC power source controlled by the AC power supply unit 120 is B [Vrms], the AFE 130 converts the DC power to a predetermined DC power of a predefined C [V] corresponding to B [Vrms] .

The inverters 141, 142, and 143 convert the DC power of a predetermined magnitude outputted from the AFE 130 into AC power when the lower stage 150 consumes AC power, and convert the converted AC power to the lower stage 150 .

In the case where any of the loads 151, 152, and 153 of the load 150 is a motor load consuming AC power, only one inverter 141 is used instead of a rectifier and an inverter It is advantageous in terms of cost reduction and system simplification compared to the conventional power conversion system.

In this embodiment, the controller 110 is connected to the load 150. However, the present invention is not limited to this, and the position of the controller 110 can be determined by calculating the power consumption of the load 150 Can be located anywhere.

2 is a block diagram illustrating an engine variable-speed DC wiring system for fuel reduction and system simplification in a stand-alone diesel power generation system according to another embodiment of the present invention. The DC wiring system 200 for power reduction according to another embodiment of the present invention may include a DC power supply unit 210, at least one inverter 221, 222, 223, and a lower stage 230 .

First, the DC power supply unit 210 may supply DC power to the lower stage 230. For example, the DC power supply unit 210 may be a device for supplying DC power such as a battery and solar light.

The inverters 221, 222 and 223 convert the DC power supplied from the DC power supply unit 210 to AC power when the lower stage 230 consumes the AC power and output the converted AC power to the lower stage 230 Can supply.

In the present embodiment, only the DC power supplied from the DC power supply unit 210 is described as an example. However, the present invention is not limited thereto, and the AC power supply unit 120 and the DC power supply unit 210 shown in FIG. And the control unit 110 shown in FIG. 1 may be shown together. That is, the system of the present invention may be configured with a combination of FIG. 1 and FIG.

3 is a flowchart showing a sequence of an engine variable-speed DC wiring method for fuel reduction and system simplification of a stand-alone diesel power generation system according to another embodiment of the present invention. First, the system 100 can calculate the power consumption of the lower stage 150 (S310). Specifically, the control unit 110 is connected to the lower stage 150 to calculate the amount of power consumed in the plurality of loads 151, 152, and 153 in real time.

Thereafter, the system 100 may control the intensity of the AC power so that the set AC power corresponding to the amount of power consumption is supplied to the lower stage 150 (S320). Specifically, the AC power supply unit 120 is controlled by the control unit 110 such that a predefined AC power corresponding to the current power consumption of the load cell 150 can be supplied to the load cell 150, The intensity can be controlled.

Thereafter, the system 100 may convert the controlled AC power into a predetermined DC power corresponding to the intensity of the AC power (S330). Specifically, the AFE 130 may convert the AC power controlled by the AC power supply unit 120 into a predetermined DC power corresponding to the intensity of the AC power.

Then, the system 100 can supply DC power to the loading stage 150 (S340). Specifically, the inverters 141, 142, and 143 convert DC power of a predetermined magnitude output from the AFE 130 into AC power when the load 150 consumes AC power, And can be supplied to the lower stage 150.

Although the embodiments of the present invention have been described in detail with reference to the accompanying drawings, it is to be understood that the present invention is not limited to those embodiments and various changes and modifications may be made without departing from the scope of the present invention. . Therefore, the embodiments disclosed in the present invention are intended to illustrate rather than limit the scope of the present invention, and the scope of the technical idea of the present invention is not limited by these embodiments. The scope of protection of the present invention should be construed according to the following claims, and all technical ideas within the scope of equivalents are to be understood as being within the scope of the present invention. It is to be understood that the invention is not limited thereto.

100 system
110 control unit
120 AC power supply
130 AFE (Active Front End)
141 to 143 Inverter
150 parts bottom
151 to 153 load

Claims (5)

Calculating a power consumption amount of the lower stage;
Controlling the intensity of the AC power so that the set AC power corresponding to the power consumption is supplied to the lower stage;
Converting the controlled alternating current power into a set direct current power corresponding to the intensity of the alternating current power; And
And supplying the DC power to the subordinate stage. The engine variable speed DC wiring method for fuel reduction and system simplification of a stand-alone diesel power generation system. The method according to claim 1,
Converting the direct current power into an alternating current power when the negative end consumes the alternating current power; And
And supplying the converted AC power to the subordinate stage. The method of claim 1, further comprising the step of supplying the converted AC power to the subordinate stage. The method according to claim 1,
And supplying direct current power to the lower end of the direct current power supply unit. A controller for calculating the power consumption of the lower stage and controlling the intensity of the AC power so that the set AC power corresponding to the power consumption is supplied to the lower stage;
An AC power supply for generating the controlled AC power under the control of the controller; And
And an AFE (Active Front End) for converting the generated AC power to a predetermined DC power corresponding to the intensity of the AC power and supplying the DC power to the subordinate stage, Variable speed DC wiring system for. 5. The method of claim 4,
An inverter for converting the direct-current power into an alternating-current power and supplying the converted alternating-current power to the lower-end when the lower end consumes the alternating-current power;
And a direct current power supply unit for supplying direct current power to the lower end of the variable dc power generation system.

Images