本推荐规程提供了根据SAE J2894/1《插入式电动汽车充电器的电能质量要求》中确定的参数评估PEV充电器的试验程序。此外，本推荐规程提供了评估电动汽车供电设备/充电器/电池/车辆系统能效的程序，能效是电能质量的一个子集。利益相关者要求从J2894/1扩展范围，它与州和联邦流程中当前的系统级分析相关。根据该协议，范围包括储能系统以及该系统的输入和输出。 考虑到评估，建立了系统边界。系统边界定义了被测元件和测量点。图1显示了根据本推荐规程预计要评估的大多数系统的系统边界。在该系统边界中，用于评估的蓄电池充电系统部件包括电动汽车供电设备、蓄电池充电器（BC）、为辅助负载供电的系统和蓄电池。应该注意的是，这是对J2894/1原始文本的更改，但为了系统分析的目的，必须包括所有元素，如电动车辆供电设备，以评估效率和对事件的响应。 就电能质量和效率而言，这种变化的影响应该很小。请注意，电池或辅助负载没有区别，它们可能包括风扇、冷却器或其他热管理设备。请注意，一些系统可能需要多个测量点来捕获所有辅助负载。

This recommended practice provides test procedures for evaluating PEV chargers for the parameters established in SAE J2894/1, Power Quality Requirements for Plug-In Electric Vehicle Chargers. In addition, this Recommended Practice provides procedures for evaluating EVSE/charger/battery/vehicle systems in terms of energy efficiency, which is a subset of power quality. This expansion of scope from J2894/1 was requested by the stakeholders, and it provides relevance to the system level analyses that are current in state and federal processes. In accordance, the scope includes the energy storage system and the input and output of that system.In consideration of evaluation, a system boundary is established. The system boundary defines the tested elements and the measurement points. The system boundary for most of the systems expected to be evaluated under this Recommended Practice is shown in Figure 1. In this system boundary the parts of the battery charging system that are included for evaluation are the EVSE, the battery charger (BC), the system powering auxiliary loads, and the battery. It should be noted that this is a change from the original text of J2894/1, but it was essential for the purposes of system analysis to include all the elements, such as the EVSE, to evaluate efficiency and response to events. In terms of power quality and efficiency, the effects of this change should be minor. Note that no distinction is made about the battery or the auxiliary loads, which may include fans, chillers, or other thermal management devices. Note that some systems may require multiple measurement points to capture all auxiliary loads.