NSF Center for GRid-connected Advanced Power Electronic Systems - - PowerPoint PPT Presentation

▶
nsf center for grid connected advanced
SMART_READER_LITE
LIVE PREVIEW

NSF Center for GRid-connected Advanced Power Electronic Systems - - PowerPoint PPT Presentation

Jul 23, 2023 33 likes •231 views

GRid-Connected Advanced Power Electronic Systems NSF Center for GRid-connected Advanced Power Electronic Systems (GRAPES) GR-17-13 SiC Medium Voltage Motor Drive for Volt-VAR Optimization Roy McCann, Alan Mantooth, Haider Mhiesan Semi-Annual

slide-1
SLIDE 1

GRid-Connected Advanced Power Electronic Systems

Confidential – Semi-Annual Meeting May 2017

NSF Center for GRid-connected Advanced Power Electronic Systems (GRAPES) GR-17-13 SiC Medium Voltage Motor Drive for Volt-VAR Optimization

Roy McCann, Alan Mantooth, Haider Mhiesan Semi-Annual Meeting May 23-24, 2017

slide-2
SLIDE 2

GRid-Connected Advanced Power Electronic Systems

Confidential – Semi-Annual Meeting May 2017

Project Overview

  • Anticipated Project Dates:
  • Start: 7/1/2017
  • Finish Year 1: 6/30/2018
  • PI: Roy McCann
  • Co-PI Alan Mantooth
  • Research Assistant: Haider Mhiesan (PhD student)
  • Overall Project Budget
  • Year 1 Budget:
  • Research Assistant: $1800/month ($21.6 K/year)
  • Materials and Supplies: $7200

2

slide-3
SLIDE 3

GRid-Connected Advanced Power Electronic Systems

Confidential – Semi-Annual Meeting May 2017

Project Overview

  • Overall Project Budget
  • Year 1 Budget:
  • Research Assistant Tuition: $2586
  • Undergrad Hourly: $2400
  • Domestic travel: (GRAPES meetings, IEEE conferences)
  • Year 1 Budget Total: $36,186
  • Year 2 Budget:
  • Same assistantship, tuition, travel expenses.
  • Increased material costs for SiC modules: 10 kV SiC

availability.

3

slide-4
SLIDE 4

GRid-Connected Advanced Power Electronic Systems

Confidential – Semi-Annual Meeting May 2017

Introduction

 There are increasing challenges in the operation of

electric power systems due to expanding capacity from renewable energy sources.

  • Introduction of distributed energy resources and

microgrids.

 Volt-VAR Optimization (VVO) and Conservation

Voltage Reduction (CVR) for demand side management programs as tools in balancing load with variable energy sources.

4

slide-5
SLIDE 5

GRid-Connected Advanced Power Electronic Systems

Confidential – Semi-Annual Meeting May 2017

Volt/VAR Control & Optimization

5

 Volt-VAR control (VVC)

applied to electric distribution systems.

 Purpose of VVC is to

maintain acceptable voltage at all points along the distribution feeder under all loading conditions.

Image: EPRI www.epri.com/Documents/Summer_Seminar_2014

slide-6
SLIDE 6

GRid-Connected Advanced Power Electronic Systems

Confidential – Semi-Annual Meeting May 2017

VVC Example

6

116.0 118.0 120.0 122.0 124.0 126.0

Normal Operation With VVC

Substation

EOL 55

CAP 1 CAP 3 CAP 4 REG 1 REG 2 CAP 2

Normal Operation = 7-23-10 @4:44pm Volt / Var Control Operating = 7-24-10 @4:44pm Image & Reference: AEP Presentation SWEDE Conference Austin, TX May 2013.

slide-7
SLIDE 7

GRid-Connected Advanced Power Electronic Systems

Confidential – Semi-Annual Meeting May 2017

Transformerless MV Drive VVO/CVR

 Revisions to (amended) IEEE 1547a allows for active

voltage control from inverter-based distributed generation.

  • Trend towards coordination in distribution automation

systems with digital communication technologies for direct communication between utility providers and electricity users.

 This project develops a transformerless MV motor

drive that is capable of responding to VVO/CVR commands.

  • When widely deployed this provides capability to

maximize the benefits of VVO/CVR programs.

7

slide-8
SLIDE 8

GRid-Connected Advanced Power Electronic Systems

Confidential – Semi-Annual Meeting May 2017

Drive Configuration

8

Monitoring and control MV Grid Interface

slide-9
SLIDE 9

GRid-Connected Advanced Power Electronic Systems

Confidential – Semi-Annual Meeting May 2017

Prior Development

 At distribution (medium voltage) levels there are

methods for implementing VVO methods using tap- changing transformers and switched capacitor banks.

  • Existing implementation of VVO/CVR programs rely

upon substation SCADA communications such as IEC 61850

 Active VVO/CVR for large industrial have been

explored:

  • B. Le, Cañizares and Bhattacharya, "Incentive Design for Voltage

Optimization Programs for Industrial Loads," IEEE Transactions on Smart Grid, vol. 6, no. 4, July 2015.

9

slide-10
SLIDE 10

GRid-Connected Advanced Power Electronic Systems

Confidential – Semi-Annual Meeting May 2017

Development Method

 A three-phase back-to-back motor drive will be

developed that provides variable VAR support at the utility interface.

  • Leverages prior development of static VAR

compensators (SVC) with a voltage source converter.

  • The results for a single-phase converter will be

expanded to three-phases:

Isobe, D. Shiojima, K. Kato, Y. R. R. Hernandez and R. Shimada, "Reactive Power Compensator With Minimized-Equipped Capacitor and Its Application to Static Var Compensator," in IEEE Transactions on Power Electronics, vol. 31, no. 1, pp. 224-234, Jan. 2016.

10

slide-11
SLIDE 11

GRid-Connected Advanced Power Electronic Systems

Confidential – Semi-Annual Meeting May 2017

Year 1 Development

 Develop a transformerless circuit topology and control.

  • Problem of CM voltage [Kumar and Poddar, "Control of Medium-

Voltage AC Motor Drive for Wide Speed Range Using Modular Multilevel Converter," IEEE Transactions on Industrial Electronics, vol. 64, no. 4, April 2017.]

11

slide-12
SLIDE 12

GRid-Connected Advanced Power Electronic Systems

Confidential – Semi-Annual Meeting May 2017

Common Mode Voltage

12

Motor phase voltage line-neutral Motor phase voltage line-ground

[Kumar and Poddar, "Control of Medium-Voltage AC Motor Drive for Wide Speed Range Using Modular Multilevel Converter," IEEE Transactions on Industrial Electronics,

  • vol. 64, no. 4, April 2017.]
slide-13
SLIDE 13

GRid-Connected Advanced Power Electronic Systems

Confidential – Semi-Annual Meeting May 2017

Conventional Solution

13

 Develop a transformerless circuit topology and control.

  • Problem of CM voltage [Mechlinski, Schröder, Shen and De Doncker,

"Common-mode voltage limits for the transformerless design of MV drives to prevent bearing current issues," 2016 IEEE Energy Conversion Congress and Exposition (ECCE), Milwaukee, WI, 2016]

slide-14
SLIDE 14

GRid-Connected Advanced Power Electronic Systems

Confidential – Semi-Annual Meeting May 2017

SVPWM for CM Reduction

14

CM reduction through SVPWM for transformerless medium voltage motor drive: Bin Wu; Mehdi Narimani, "Transformerless MV Drives," High-Power Converters and AC Drives, Wiley-IEEE Press, 2017

slide-15
SLIDE 15

GRid-Connected Advanced Power Electronic Systems

Confidential – Semi-Annual Meeting May 2017

3-Level SiC NPC Inverter

15

3-Level NPC Inverter: Implementation with SiC MOSFETs

slide-16
SLIDE 16

GRid-Connected Advanced Power Electronic Systems

Confidential – Semi-Annual Meeting May 2017

Converter Development

 A transformerless SiC 3L-NPC converter will be

developed leveraging previous GRAPES projects:

  • GR-16-02 “High Step-Up/Down Resonant SiC Transformerless

Modular Multilevel Converter”

  • GR-17-03 “SiC-Based Direct PE Interface for Battery Energy

Storage System into Medium Voltage Distribution System”

16

slide-17
SLIDE 17

GRid-Connected Advanced Power Electronic Systems

Confidential – Semi-Annual Meeting May 2017

Benefits

 Development of a transformerless VVO/VFD will

enable increased use of demand response programs while providing for stable and reliable operation of future electric power systems with increasing amount of distributed generation.

  • Achieved in a cost-effective manner by minimizing the

need for switched capacitor banks, regulators, tap changing transformers.

  • Minimizes MV drive costs by eliminating transformer.

17

slide-18
SLIDE 18

GRid-Connected Advanced Power Electronic Systems

Confidential – Semi-Annual Meeting May 2017

Project Planning

  • Mid-Project (Y1-1): Demonstrate VVO functionality

with variable speed and torque control functions on low-power (3.6 kW) drive with 1200 V SiC MOSFETs.

  • Confirm performance using dynamometer test stand

at NCREPT.

  • Mid-Project (Y1-2): Demonstrate simultaneous VVO

and variable speed & torque motor drive functions under dynamic conditions representative of electric utility operations (NCREPT dynamometer test stand).

18

slide-19
SLIDE 19

GRid-Connected Advanced Power Electronic Systems

Confidential – Semi-Annual Meeting May 2017

Deliverables

  • End-of-Project (Y2-1): Build a SiC 10 kV MOSFET

three-phase converter for 4160-V motor drive.

  • End-of-Project (Y2-1): Demonstrate with 10 kV SiC

MOSFET converter simultaneous VVO and variable speed & torque motor drive functions under dynamic conditions representative of electric utility

  • perations.
  • Other deliverables:
  • Haider Mhiesan PhD complete: 2019
  • Patentable algorithms and circuits
  • Transactions publications

19