DESIGN DATA SHEET - doerry.org

1 DDS 310-1 REV 1 DESIGN data SHEET ELECTRIC POWER LOAD ANALYSIS (EPLA) FOR SURFACE SHIPS DEPARTMENT OF THE NAVY NAVAL SEA SYSTEMS COMMAND WASHINGTON NAVY YARD, DC 20376-5124 DISTRIBUTION STATEMENT A. APPROVED FOR PUBLIC RELEASE; DISTRIBUTION UNLIMITED. 17 SEPTEMBER 2012 DDS 310-1 REV 1 ii DDS 310-1 REV 1 17 September 2012 Supersedes DDS 310-1 dated 01 July 1980 CONTENTS PARAGRAPH PAGE 1. APPLICABLE DOCUMENTS 1 General 1 Government documents 1 Specifications, standards, and handbooks 1 Other Government documents, drawings, and publications 1 Non-Government publications 1 Order of precedence 1 2. INTRODUCTION 2 Scope 2 3.

2 DEFINITIONS 3 24-hour average ship service endurance electric load 3 24-hour average ship service mission electric load profile 3 24-hour average ship service sustained electric load 4 Ambient condition profile 4 Connected load: Identification plate or rated power of the load (kW) 4 Demand factor 4 Demand power 4 Electric and propulsion plant concept of operations 4 Emergency ship control 4 Energy storage module 5 Load factor 5 Long-term interrupt load 5 Margin 5 Maximum residual zonal power demand 5 Mutually exclusive loads 5 Operating load 5 Peak load 5 Product model 5 Quality of service (QOS) 5 Reserve power 6 Residual zonal power demand 6 Service interruption 6 Reconfiguration time (t1) 6 Generator start time (t2)

3 6 Service life allowance 6 Ship demand power 6 Ship operating conditions 6 Anchor 6 Shore 6 Cruising 6 Functional 6 DDS 310-1 REV 1 iii PARAGRAPH PAGE Emergency 7 Surface combatant 7 Aircraft carrier 7 Amphibious 7 Auxiliary 7 Mine warfare and patrol craft 7 Short-term interrupt load 7 Standby power 7 Total operating load 7 Un-interruptible load 7 Zonal load factor 7 Zonal operating load 7 Zonal power system element 7 4. GENERAL REQUIREMENTS 7 Electric load list 7 Inputs 7 Outputs 8 24-hour average load parametric equation 8 Inputs 8 Outputs 8 Load factor analysis 8 Inputs 8 Outputs 8 Zonal load factor analysis 9 Inputs 9 Outputs 9 Demand factor analysis 9 Inputs 9 Outputs 9 Stochastic load analysis 9 Inputs 9 Outputs 10 Modeling and simulation load analysis 10 Inputs 10 Outputs 10 Quality of service (QOS) load analysis 10 Inputs 11 Outputs 11 Comparing trials data with load analysis 11 Inputs 11 Outputs 11 5.

4 SPECIFIC REQUIREMENTS 11 Electric load list 11 Collecting load data 11 Combining loads 12 24-hour average load parametric equation 12 DDS 310-1 REV 1 iv PARAGRAPH PAGE Load factor analysis 13 Assigning load factors 14 Load factor assignment considerations 14 Load analysis when load data exists 14 Special loads 14 24-hour average load calculations 15 Load factor analysis reports 15 EPLA detailed report 15 EPLA summary report 15 Zonal load factor analysis 15 Assigning zonal load factors 16 Zonal load factor analysis reports 17 Demand factor analysis 18 Stochastic load analysis 19 Stochastic load analysis guidance 19 Introduction 19 Load characterization 20 Monte Carlo Simulation 22 Random variable generation 23 Estimating output PDF properties 24 Stochastic load analysis reports 24 Modeling and simulation load analysis 25 Modeling and simulation load analysis guidance 25 Modeling and simulation load analysis reports 25 Quality of service (QOS) load analysis 26 Comparing trials data with load analysis 27 FIGURES Figure 1.

5 Inter-relationship of DDS 310-1 tasks 3 Figure 2. Load factor example 13 Figure 3. Zonal load factor 17 Figure 4. Demand factor curve (MS 18299) 18 Figure 5. Demand factor curve based on connected load 19 Figure 6. Uniform distribution PDF and CDF 21 Figure 7. Triangular distribution PDF and CDF 21 Figure 8. Discrete distribution PDF and CDF 22 Figure 9. Normal distribution PDF and CDF 22 Figure 10. Monte Carlo Simulation Algorithm 23 Figure 11. Inverse transform technique 23 Figure C-1. Collection Hold and Transfer (CHT) sewage system C-1 Figure C-2. Electric load time history C-2 Figure C-3. Histogram of CHT power usage C-2 Figure C-4.

6 PDF of histogram for CHT power usage C-3 Figure C-5. Triangle distribution approximation C-4 Figure C-6. Comparison of histogram and triangle approximation C-4 DDS 310-1 REV 1 v APPENDICES PAGE APPENDIX A Load Factor Tables for Surface Ships A-1 APPENDIX B Load Amalgamation B-1 APPENDIX C Stochastic Modeling Example C-1 DDS 310-1 REV 1 1 1. APPLICABLE DOCUMENTS General. The documents listed in this section are specified in the main body of this document. This section does not include documents cited in the Appendices. Government documents. Specifications, standards, and handbooks. The following specifications, standards, and handbooks form part of this document to the extent specified herein.

7 Unless otherwise specified, the issues of these documents are those cited in the solicitation or contract. DEPARTMENT OF DEFENSE STANDARDS MIL-STD-1399-300 - Interface Standard for Shipboard Systems, Section 300B, Electric Power, Alternating Current MILITARY STANDARD (MS) DRAWINGS MS 18299 - Shipboard Power Demand Factors 450 Volts (Copies of these documents are available online at or ) Other Government documents, drawings, and publications. The following other Government documents, drawings, and publications form a part of this document to the extent specified herein. Unless otherwise specified, the issues of these documents are those cited in the solicitation or contract.

8 NAVAL SEA SYSTEMS COMMAND (NAVSEA) PUBLICATIONS S9040-AA-IDX-010/SWBS 5D - Expanded Ship Work Breakdown Structure for All Ships and Ship/Combat Systems (ESWBS) T9300-AF-PRO-020 - NAVSEA DESIGN Practice and Criteria Manual, Electrical Systems for Surface Ships, Chapter 300 (Copies of these documents are available from the Naval Logistics Library, 5450 Carlisle Pike, Mechanicsburg, PA 17055 or online at ) NAVAL SEA SYSTEMS COMMAND (NAVSEA) DESIGN data SHEETS (DDS) DDS 200-1 - Calculation Of Surface Ship Endurance Fuel Requirements (Copies of this document are available from Commander, Naval Sea Systems Command, ATTN: SEA 05S, 1333 Isaac Hull Avenue, SE, Stop 5160, Washington Navy Yard DC 20376-5160, or by email at with the subject line DDS request.)

9 Non-Government publications. The following documents form a part of this document to the extent specified herein. Unless otherwise specified, the issues of these documents are those cited in the solicitation or contract. CODE OF FEDERAL REGULATIONS (CFR) TITLE 46, PART 112 - Shipping: Emergency Lighting And Power Systems (Copies of this document are available from the Superintendent of Documents, Government Printing Office, Washington, DC 20401 or online at ) Order of precedence. Unless otherwise noted herein or in the contract, in the event of a conflict between the text of this document and the references cited herein, the text of this document takes precedence.

10 Nothing in this document, however, supersedes applicable laws and regulations unless a specific exemption has been obtained. DDS 310-1 REV 1 2 2. INTRODUCTION Scope. This DESIGN data SHEET (DDS) provides procedures for preparing an Electric Power Load Analysis (EPLA) for conventional-powered fossil fueled surface ships. However, this DDS may be used as a basis for preparing a load and power analysis for a ship powered by other means. The EPLA, also referred to as the Electric Plant Load Analysis or the System Load and Power Analysis, is used as an input for determining the power requirements for electrical generation, energy storage, and power conversion components and equipment and current requirements for electrical distribution equipment and components.