This part of IEC 62933, which is a Technical Report, presents a case study of electrical energy storage (EES) systems located in electric vehicle (EV) charging stations with photovoltaic (PV) power generation (PV-EES-EV charging stations) with a voltage level of 20 kV and below. EES systems are highlighted in this document because they are a desired option to make the charging stations (especially the high-power fast charging stations) grid-friendly, improve the self-consumption of clean energy generation, and increase the revenue of stations. In this application, EES systems show excellent performance by running in a variety of available operating modes, such as peak shaving, power smoothing, load tracing, time-of-use (TOU) price arbitrage, and ancillary services. The general duty cycle is recommended based on the summary of the operation characteristics of the EES systems.<\/p>\n
This document includes the following elements:<\/p>\n
overview of general PV-EES-EV charging stations;<\/p>\n<\/li>\n
operational analysis of EES systems in typical project cases;<\/p>\n<\/li>\n
summary and recommendation of EES systems\u2019 operation modes.<\/p>\n<\/li>\n<\/ul>\n
| PDF Pages<\/th>\n | PDF Title<\/th>\n<\/tr>\n | ||||||
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| 2<\/td>\n | undefined <\/td>\n<\/tr>\n | ||||||
| 4<\/td>\n | CONTENTS <\/td>\n<\/tr>\n | ||||||
| 7<\/td>\n | FOREWORD <\/td>\n<\/tr>\n | ||||||
| 9<\/td>\n | 1 Scope 2 Normative references 3 Terms, definitions and abbreviated terms 3.1 Terms and definitions 3.2 Abbreviated terms <\/td>\n<\/tr>\n | ||||||
| 10<\/td>\n | 4 Overview of EES systems located in EV charging stations with PV power generation 4.1 General 4.2 Application scenarios <\/td>\n<\/tr>\n | ||||||
| 11<\/td>\n | 4.3 System communication architecture <\/td>\n<\/tr>\n | ||||||
| 12<\/td>\n | 4.4 Duty cycle analysis Figures Figure 1 \u2013 Example of communication system architectureof PV-EES-EV charging station <\/td>\n<\/tr>\n | ||||||
| 13<\/td>\n | 5 Project of commercial PV-EES-EV charging station based on common DC bus 5.1 Case project overview Figure 2 \u2013 System structure for the case of a commercial PV-EES-EVcharging station based on common DC bus <\/td>\n<\/tr>\n | ||||||
| 14<\/td>\n | 5.2 System operation and control 5.2.1 Operation data analysis Figure 3 \u2013 EV load and PV power for the case of a commercialcharging station based on common DC bus Figure 4 \u2013 TOU and charging service prices for the case of a commercialcharging station based on common DC bus <\/td>\n<\/tr>\n | ||||||
| 15<\/td>\n | 5.2.2 Operation mode analysis <\/td>\n<\/tr>\n | ||||||
| 16<\/td>\n | Figure 5 \u2013 Operating power in low- and medium-price periodsfor the case of a commercial charging station based on common DC bus <\/td>\n<\/tr>\n | ||||||
| 17<\/td>\n | 5.3 Summary Figure 6 \u2013 Operating power in high-price periods for the case of a commercial charging station based on common DC bus Figure 7 \u2013 EES system duty cycle for the case of a commercialcharging station based on common DC bus <\/td>\n<\/tr>\n | ||||||
| 18<\/td>\n | Tables Table 1 \u2013 Time division of EES system\u2019s operation modes in the caseof a commercial charging station based on common DC bus <\/td>\n<\/tr>\n | ||||||
| 19<\/td>\n | 6 Project of commercial PV-EES-EV charging station based on common AC bus 6.1 Case project overview Figure 8 \u2013 Daily electricity flow for the case of a commercialcharging station based on common DC bus <\/td>\n<\/tr>\n | ||||||
| 20<\/td>\n | 6.2 System operation and control 6.2.1 Operation data analysis Figure 9 \u2013 System structure for the case of a commercial PV-EES-EVcharging station based on common AC bus <\/td>\n<\/tr>\n | ||||||
| 21<\/td>\n | 6.2.2 Operation mode analysis Figure 10 \u2013 EV load and PV power for the case of a commercialcharging station based on common AC bus Figure 11 \u2013 Operating power in power smoothing mode for the case of a commercial charging station based on common AC bus <\/td>\n<\/tr>\n | ||||||
| 22<\/td>\n | Figure 12 \u2013 Operating power in peak shaving mode forthe case of a commercial charging station based on common AC bus <\/td>\n<\/tr>\n | ||||||
| 23<\/td>\n | 6.3 Summary Figure 13 \u2013 Operating power in the TOU price arbitrage mode forthe case of a commercial charging station based on common AC bus Table 2 \u2013 Time division of the EES system\u2019s operation modes for the case of acommercial charging station based on common AC bus <\/td>\n<\/tr>\n | ||||||
| 24<\/td>\n | Figure 14 \u2013 EES duty cycle for the case of a commercial chargingstation based on common AC bus Figure 15 \u2013 Daily electricity flow for the case of a commercialcharging station based on common AC bus <\/td>\n<\/tr>\n | ||||||
| 25<\/td>\n | 7 Project of business PV-EES-EV charging station based on common DC bus 7.1 Case project overview Figure 16 \u2013 System structure for the case of a business PV-EES-EVcharging station based on common DC bus <\/td>\n<\/tr>\n | ||||||
| 26<\/td>\n | 7.2 System operation and control 7.2.1 Operation data analysis Figure 17 \u2013 PV power, EV load and output power for the caseof a business charging station based on common DC bus Figure 18 \u2013 TOU and charging service prices for the caseof a business charging station based on common DC bus <\/td>\n<\/tr>\n | ||||||
| 27<\/td>\n | 7.2.2 Operation mode analysis Figure 19 \u2013 Operating power in equivalent load tracing mode for thecase of a business charging station based on common DC bus <\/td>\n<\/tr>\n | ||||||
| 28<\/td>\n | Figure 20 \u2013 Operating power in TOU price arbitrage mode for the case of a business charging station based on common DC bus <\/td>\n<\/tr>\n | ||||||
| 29<\/td>\n | 7.3 Summary Figure 21 \u2013 Operating power in demand response mode for thecase of a business charging station based on common DC bus Figure 22 \u2013 Operating power involved in TOU arbitrage and demand responsefor the case of a business charging station based on common DC bus <\/td>\n<\/tr>\n | ||||||
| 30<\/td>\n | Figure 23 \u2013 EES duty cycle for the case of a business charging station based on common DC bus Figure 24 \u2013 Daily electricity flow for the case of a business chargingstation based on common DC bus <\/td>\n<\/tr>\n | ||||||
| 31<\/td>\n | 8 Project of business PV-EES-EV charging station based on common AC bus 8.1 Case project overview 8.2 System operation and control 8.2.1 Operation data analysis Figure 25 \u2013 System structure for the case of a business PV-EES-EVcharging station based on common AC bus <\/td>\n<\/tr>\n | ||||||
| 32<\/td>\n | 8.2.2 Operation mode analysis Figure 26 \u2013 EV load and PV power for the case of a businesscharging station based on common AC bus <\/td>\n<\/tr>\n | ||||||
| 33<\/td>\n | Figure 27 \u2013 Simulation results for operation strategy 1 for the case of a business charging station based on common AC bus Figure 28 \u2013 Simulation results for operation strategy 2 for thecase of a business charging station based on common AC bus <\/td>\n<\/tr>\n | ||||||
| 35<\/td>\n | 8.3 Summary Figure 29 \u2013 Simulation results for operation strategy 3 for thecase of a business charging station based on common AC bus Figure 30 \u2013 Three operation strategies and resultant operation modes of the EES system for the case of a business charging station based on common AC bus <\/td>\n<\/tr>\n | ||||||
| 36<\/td>\n | 9 Recommendation for operation modes of EES systems located in EV charging station with PV panels Table 3 \u2013 Time division of EES operation modesfor the case of a business charging station based on common AC bus <\/td>\n<\/tr>\n | ||||||
| 37<\/td>\n | Table 4 \u2013 Recommended operation modes of the EES system in various installation scenarios of a PV-EES-EV charging station <\/td>\n<\/tr>\n | ||||||
| 38<\/td>\n | Annex A (informative)Duty cycles of the EES systems located in EV charging station with PV A.1 General A.2 Project of commercial PV-EES-EV charging station based on common DC bus Table A.1 \u2013 Charging-discharging power of EES system for the case of a commercial charging station based on common DC bus (per-unit value) <\/td>\n<\/tr>\n | ||||||
| 40<\/td>\n | A.3 Project of commercial PV-EES-EV charging station based on common AC bus Table A.2 \u2013 Charging-discharging power of EES system for the case of a commercialcharging station based on common AC bus (per-unit value) <\/td>\n<\/tr>\n | ||||||
| 47<\/td>\n | A.4 Project of business PV-EES-EV charging station based on common DC bus Table A.3 \u2013 Charging-discharging power of EES system for the case of a businesscharging station based on common DC (per-unit value) <\/td>\n<\/tr>\n | ||||||
| 49<\/td>\n | Bibliography <\/td>\n<\/tr>\n<\/table>\n","protected":false},"excerpt":{"rendered":" Electrical energy storage (EES) systems – Unit parameters and testing methods. Case study of electrical energy storage (EES) systems located in EV charging station with PV<\/b><\/p>\n |