GB/T 35031.4-2022Customer energy management system - Part 4: Specification for information exchange between host and gateways (English PDF)

Foreword

This document was issued on 12 October 2022 by the State Administration for Market Regulation; Standardization Administration of the PRC and takes effect on 1 May 2023.

It is a GB/T standard: recommended rather than compulsory, but it is the text a Chinese reviewer applies when assessing a submission.

It is classified under ICS 29.020, Chinese classification K00.

This document is in accordance with the provisions of GB/T 1.1-2020 "Guidelines for Standardization Work Part 1.Structure and Drafting Rules for Standardization Documents"

drafting.

This document is part 4 of GB/T 35031 "Energy Management System at Customer End". GB/T 35031 has issued the following parts.

--- Part 1.Guidelines;

--- Part 2.Master station functional specification;

--- Part 3-1.General requirements for subsystem interface gateways;

--- Part 3-2.Subsystem interface gateway data configuration;

--- Part 4.Master station and gateway information interaction specifications;

--- Part 6.Management indicator system;

--- Part 7.Functional classification and system classification;

--- Part 8.Use Cases.

Please note that some contents of this document may refer to patents. The issuing agency of this document assumes no responsibility for identifying patents.

This document is proposed by China Electrical Equipment Industry Association.

This document is under the jurisdiction of the National Electrical Equipment Network Communication Interface Standardization Technical Committee (SAC/TC411).

This document is drafted by. Shanghai Electric Appliance Research Institute, XJ Electric Co., Ltd., Zhuhai Painuo Technology Co., Ltd., Nanjing

Daqo Electric Research Institute Co., Ltd., Beijing Huadian Zhongxin Technology Co., Ltd., Yantai Dongfang Wisdom Electric Co., Ltd., Shanghai Weilai

Automobile Co., Ltd., Shanghai Jiaotong University, Ningbo Artificial Intelligence Research Institute of Shanghai Jiaotong University, Shandong Hexin Power Technology Co., Ltd., Shanghai Electric Power Co., Ltd.

Li University, Shanghai Luohusi Automation Technology Co., Ltd., Shanghai Ubiku Electric Co., Ltd., Suzhou Wanlong Electric Group Co., Ltd.

The main drafters of this document. Cai Zhongyong, Wu Xiaodong, Wei Yong, Wang Changqing, Liu Liang, Tian Haitao, Cheng Tiejun, Liu Tao, Peng Daogang, Zhang Weihong,

Lu Lin, Lu Jianfeng, Chen Dingjian, He Ke, Xi Peifeng, Tong Weiming, Tang Jun, Nie Jia, Xue Ji, Cheng Ruiyuan, Zhang Hao, Ge Shujun, Ju Changjiang, Yang Genke,

Jiao Pingyi, Lu Huiqing, Wang Yujing, Bi Jinghu, Chen Ping, Li Xiaolu, Liu Jun, Yan Lan, Cui Ming, Liu Xiaochun, Xie Ruobing, Yang Yinggang, Xu Xiangming,

Hu Daliang, Deng Subi, Zhang Yongxiang, Su Guanqun, Yuan Linjie, Cheng Cen.

Introduction

GB/T 35031 "Energy Management System at Client End" is a recommended standard to guide the standardization of energy management at client end.

Technical requirements, data interface model and evaluation system, to solve the problems that have long plagued different manufacturers and different enterprises in the field of energy management at the user end in my country.

Compatibility between users and different systems is difficult.

Given that the user-side energy management system involves multiple dimensions such as systems and components, hardware and software, communication protocols, data interfaces, monitoring and evaluation, etc.

Its content can be clearly divided into several relatively independent but interrelated parts, so GB/T 35031 is proposed to be composed of eight parts.

--- Part 1.Guidelines. Provide user end energy management system architecture model and general requirements.

--- Part 2.Master functional specifications. Including the functional architecture, function definition and requirements of the main station software of the user-end energy management system.

--- Part 3-1.General requirements for subsystem interface gateways. Contains the subsystem interface gateway functional model, functional requirements and electrical,

General requirements for machinery, inspection, etc.

--- Part 3-2.Subsystem interface gateway data configuration. Define the data model of the subsystem interface gateway and the data that should be configured.

--- Part 4.Master station and gateway information exchange specification. Define the subsystem interface gateway to communicate with the master station through the MQTT protocol

Interactive topics.

--- Part 5.Application side interface specification. Define various application programming interfaces for the application side.

--- Part 6.Indicator system. Provide the user end energy management system technical index system and the definition of each index item.

--- Part 7.Functional classification and system classification. Provides user end energy management system function classification and system grading methods.

--- Part 8.Use Cases. Sorting out and summarizing the forms of user-side energy services, and describing in detail various types of user-side energy management in the form of use cases

and service participants, interactive information and specific processes.

The main purpose of this document is to define various topics for the subsystem interface gateway to exchange information with the master station through the MQTT protocol. host

The information exchange protocol between the station and the gateway runs on top of TCP/IP, and MQTT is used as the application layer protocol. MQTT currently has

There are three versions 3.1, 3.1.1 and 5.0.This document stipulates the use of MQTT3.1.1 version.

Client Energy Management System

Part 4.Specifications for Information Interaction between Master Station and Gateway

1 Scope

GB/T 35031.4-2022 defines how a customer energy management system talks to the gateways in the field. Demand response and distributed generation depend on a utility or an aggregator being able to see and influence what happens behind the customer's meter — the site's load, its storage, its solar — and that reaches them through a gateway at each site. The link is the difficult part: there are very many sites, each on whatever connectivity it happens to have, often behind a domestic router, frequently offline. This part specifies the information exchange between the CEMS master station and the gateway based on MQTT, together with the information model exchanged over it. MQTT is the right choice for exactly these conditions — it was designed for constrained links and intermittent connectivity, it lets the gateway open the connection outward so no inbound firewall rule is needed, and its publish-subscribe pattern suits telemetry from thousands of endpoints far better than polling. Under ICS 29.020 and CCS K00, it is written for the vendors of energy management platforms and gateways, for utilities and aggregators running demand response programmes, and for the integrators deploying them.

This document specifies the information exchange method and information exchange method for communication between the CEMS master station and the gateway based on the MQTT communication protocol.

information interaction interface.

This document is applicable to the information exchange between CEMS main station and subsystem interface gateway.

2 Normative references

The contents of the following documents constitute the essential provisions of this document through normative references in the text. Among them, dated references

For documents, only the version corresponding to the date is applicable to this document; for undated reference documents, the latest version (including all amendments) is applicable to

this document.

GB /Z 32500-2016 General requirements for data interface of smart grid user end system

GB/T 35031.1-2018 Client energy management system Part 1.Guidelines

GB/T 35031.2-2018 Client energy management system Part 2.Master station functional specification

GB /Z 35031.8-2021 Client energy management system Part 8.Use cases

GB/T 35031.301-2019 Client Energy Management System Part 3-1.General Requirements for Subsystem Interface Gateway

GB/T 35031.302-2022 Client Energy Management System Part 3-2.Subsystem Interface Gateway Data Configuration

MQTT-3.1.1-CN.2014 Message Queue Telemetry Transport Protocol

3 Terms and definitions, abbreviations

3.1 Terms and Definitions

GB/T 35031.1-2018, GB/T 35031.2-2018, GB/T 35031.301-2019, GB /Z 35031.8-2021,

The following terms and definitions defined in GB /Z 32500-2016 apply to this document.

3.1.1

product

A collection of devices with the same capabilities or characteristics.

Note 1.The products in this document only refer to the gateway products defined in GB/T 35031.302-2022.

Note 2.The relationship between the product and the equipment, the product is like a product series, and the equipment is like a certain type of equipment under the series.

3.1.2

device device

An entity with a specific function is an instance of a product.

3.1.3

product model productmodel

JSON format file used to describe device capabilities. This file builds an abstract model of a device in the master station, so that the master station can understand the

Attribute information supported by the device.

Note 1.Defining the product model is to define the basic attributes of the equipment, the message format of reporting data and issuing commands.