Modeling simulation of combined pem fuel cell and microturbine distributed generation plant
Download
1 / 28

MODELING/SIMULATION OF COMBINED PEM FUEL CELL AND MICROTURBINE DISTRIBUTED GENERATION PLANT - PowerPoint PPT Presentation


  • 129 Views
  • Uploaded on

MODELING/SIMULATION OF COMBINED PEM FUEL CELL AND MICROTURBINE DISTRIBUTED GENERATION PLANT. Rekha .T. Jagaduri Department of Electrical and Computer Engineering Tennessee Technological University. OUTLINE. Overview of Distributed Generation Plant. Micro turbine as a DG.

loader
I am the owner, or an agent authorized to act on behalf of the owner, of the copyrighted work described.
capcha
Download Presentation

PowerPoint Slideshow about ' MODELING/SIMULATION OF COMBINED PEM FUEL CELL AND MICROTURBINE DISTRIBUTED GENERATION PLANT' - tova


An Image/Link below is provided (as is) to download presentation

Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author.While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server.


- - - - - - - - - - - - - - - - - - - - - - - - - - E N D - - - - - - - - - - - - - - - - - - - - - - - - - -
Presentation Transcript
Modeling simulation of combined pem fuel cell and microturbine distributed generation plant

MODELING/SIMULATION OF COMBINED PEM FUEL CELL AND MICROTURBINE DISTRIBUTED GENERATION PLANT

Rekha .T. Jagaduri

Department of Electrical and Computer Engineering

Tennessee Technological University

Tennesse Technological University


Outline
OUTLINE MICROTURBINE DISTRIBUTED GENERATION PLANT

  • Overview of Distributed Generation Plant.

  • Micro turbine as a DG.

  • PEM Fuel Cell as a DG.

  • Modeling of micro turbine.

  • Modeling of fuel cell.

  • Control Systems of micro turbine and fuel cell.

  • Grid connected micro turbine and fuel cell.

  • Simulation results.

  • Conclusion.

  • Future work.

Tennesse Technological University


Overview of a distributed generation
OVERVIEW OF A DISTRIBUTED GENERATION MICROTURBINE DISTRIBUTED GENERATION PLANT

  • Distributed Generation (DG) is the use of small-scale power generation technologies located close to the load being served.

  • It includes, for example, photovoltaic systems, fuel cells, natural gas engines, industrial turbines, micro turbines, energy-storage devices, wind turbines, and concentrating solar power collectors.

  • These technologies can meet a variety of consumer energy needs including continuous power, backup power, remote power, and peak shaving.

  • They can be installed directly on the consumer’s premise or located nearby in district energy systems, power parks, and mini-grids.

Tennesse Technological University


Economic advantages of dg
ECONOMIC ADVANTAGES OF DG MICROTURBINE DISTRIBUTED GENERATION PLANT

Economic advantages include one or more of the following:

  • Load management

  • Reliability

  • Power quality

  • Fuel flexibility

  • Cogeneration

  • Deferred or reduced T&D investment or charge

  • Increased distribution grid reliability/stability

Tennesse Technological University


Micro turbine as a dg
MICRO TURBINE AS A DG MICROTURBINE DISTRIBUTED GENERATION PLANT

  • Micro turbine made its commercial debut in 1998.

  • Micro turbines belongs to an emerging class of small-scale distributed power generation

  • Basic components: compressor, combustor, turbine, and generator.

  • Typically in the 30-400 kW size.

Tennesse Technological University


Micro turbine
MICRO TURBINE MICROTURBINE DISTRIBUTED GENERATION PLANT

Tennesse Technological University


Modeling of micro turbine
MODELING OF MICRO TURBINE MICROTURBINE DISTRIBUTED GENERATION PLANT

Mechanical Equations:

Electrical Equations:

Tennesse Technological University


Two axis model of a micro turbine
TWO AXIS MODEL OF A MICRO TURBINE MICROTURBINE DISTRIBUTED GENERATION PLANT

Phasor diagram of Micro turbine

Tennesse Technological University


Micro turbine controls
MICRO TURBINE CONTROLS MICROTURBINE DISTRIBUTED GENERATION PLANT

Overall block diagram of Micro turbine control

Tennesse Technological University


Frequency control of micro turbine
FREQUENCY CONTROL OF MICRO TURBINE MICROTURBINE DISTRIBUTED GENERATION PLANT

Frequency control block

Tennesse Technological University


Voltage control of micro turbine
VOLTAGE CONTROL OF MICRO TURBINE MICROTURBINE DISTRIBUTED GENERATION PLANT

Voltage control block

Tennesse Technological University


Fuel cell as a dg
FUEL CELL AS A DG MICROTURBINE DISTRIBUTED GENERATION PLANT

  • First fuel cell was developed in 1839 by Sir William Grove.

  • Practical use started in 1960’s when NASA installed this technology to generate electricity on Gemini and Apollo spacecraft.

  • Types of fuel cells: phosphoric acid, proton exchange membrane, molten carbonate, solid oxide, alkaline, and direct methanol.

  • Typically 5-1000+ kW in size,

  • A number of companies are close to commercializing proton exchange membrane fuel cells, with marketplace introductions expected soon.

Tennesse Technological University


Basic principle of a fuel cell
BASIC PRINCIPLE OF A FUEL CELL MICROTURBINE DISTRIBUTED GENERATION PLANT

  • A fuel cell consists of two electrodes separated by an electrolyte.

  • Hydrogen fuel is fed into the anode of the fuel cell. Oxygen (or air) enters the fuel cell through the cathode.

  • With the aid of a catalyst, the hydrogen atom splits into a proton (H+) and an electron. The proton passes through the electrolyte to the cathode and the electrons travel in an external circuit.

  • As the electrons flow through an external circuit connected as a load they create a DC current. At the cathode, protons combine with hydrogen and oxygen, producing water and heat.

  • Fuel cells have very low levels of NOx and CO emissions because the power conversion is an electrochemical process.

Tennesse Technological University


Pem fuel cell
PEM FUEL CELL MICROTURBINE DISTRIBUTED GENERATION PLANT

Anode side reaction: H2 2H+ + 2e-

Cathode side reaction: 0.5O2+2H++2e-H20 +Heat

------------------------------------

Overall reaction: H2 + 0.5O2  H20 +Heat

Tennesse Technological University


Overall chemical reaction of pemfc
OVERALL CHEMICAL REACTION OF PEMFC MICROTURBINE DISTRIBUTED GENERATION PLANT

Component balance Equation

Energy balance Equation

Nernst Equation

Tennesse Technological University


Power conditioning unit
POWER CONDITIONING UNIT MICROTURBINE DISTRIBUTED GENERATION PLANT

AC Voltage of the fuel cell: Vac = m . VFC

where m is the modulation index,  is the firing angle

Block diagram of fuel cell with PCU

Tennesse Technological University


Fuel cell controls
FUEL CELL CONTROLS MICROTURBINE DISTRIBUTED GENERATION PLANT

Power Control scheme

Tennesse Technological University


Fuel cell controls1
FUEL CELL CONTROLS MICROTURBINE DISTRIBUTED GENERATION PLANT

Voltage Control Scheme

Tennesse Technological University


Interfacing dg with power grid
INTERFACING DG WITH POWER GRID MICROTURBINE DISTRIBUTED GENERATION PLANT

The machine side characteristics of micro turbine are transformed to the system side frame of reference using the transformation matrix

The current injected into the system

I = Y. V

Which could be further written as

Ire+ jIim = (G + jB). Vre + jVim

Tennesse Technological University


Numerical analysis
NUMERICAL ANALYSIS MICROTURBINE DISTRIBUTED GENERATION PLANT

Test System

Tennesse Technological University


Case study
CASE STUDY MICROTURBINE DISTRIBUTED GENERATION PLANT

  • Case 1: Assuming 10% increase in input power of the micro turbine

  • Case 2: Assuming 20% increase in input power of the fuel cell

  • Case 3: Assuming a 10% increase in micro turbine power (with and without governor)

  • Case 4: Assuming a 1% increase in micro turbine voltage reference ( with and without voltage regulator)

Tennesse Technological University


Simulation results case 1
SIMULATION RESULTS – CASE 1 MICROTURBINE DISTRIBUTED GENERATION PLANT

Tennesse Technological University


Simulation results case 2
SIMULATION RESULTS – CASE 2 MICROTURBINE DISTRIBUTED GENERATION PLANT

Tennesse Technological University


Simulation results case 3
SIMULATION RESULTS – CASE 3 MICROTURBINE DISTRIBUTED GENERATION PLANT

Tennesse Technological University


Simulation results case 4
SIMULATION RESULTS – CASE 4 MICROTURBINE DISTRIBUTED GENERATION PLANT

Tennesse Technological University


Conclusion
CONCLUSION MICROTURBINE DISTRIBUTED GENERATION PLANT

  • A combined micro turbine and PEM fuel cell plant connected to a power system was modeled and simulated.

  • Both the fuel cell and micro-turbine were assumed to be equipped with power and voltage control loops.

  • The micro-turbine was modeled using the d-q frame of reference and it was interfaced with the power system using transformation between this frame of reference and the system frame of reference.

  • A test system with typical numerical values was used to determine the accuracy of the model.

Tennesse Technological University


Future work
FUTURE WORK MICROTURBINE DISTRIBUTED GENERATION PLANT

  • The same procedure may be extended to the case of several DG’s connected to a power system.

Tennesse Technological University


Thank you
THANK YOU MICROTURBINE DISTRIBUTED GENERATION PLANT

Tennesse Technological University


ad