GB/T 42316-2023Technical specification for centralized monitoring and control system of distributed energy storage (English PDF)

Foreword

This document was issued on 17 March 2023 by the State Administration for Market Regulation; Standardization Administration of the PRC and takes effect on 1 October 2023.

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

1 Scope

GB/T 42316-2023 covers the system through which an operator watches and controls many small energy storage installations from one place, rather than visiting or dialling into each of them separately. The overall requirements state the application functions such a system carries: data collection, real-time communication, operation monitoring and operation control. Its structure is then fixed in three layers — a front-end convergence layer that gathers from the sites, a business processing layer above it, and a resource storage layer — followed by the normal operating conditions the system is expected to work in, the functional requirements that take up most of the document, the performance requirements including system availability, and the test and inspection by which a delivered system is accepted. Distributed storage is awkward exactly because it is scattered: the units sit behind different meters, at different customers, on communication links of differing quality, and their combined output only becomes a usable resource if the monitoring layer sees them consistently and can act on them within a known time. A platform that reports late, or drops sites without saying so, turns a fleet back into a set of unrelated batteries. Terms follow DL/T 2528. Grid and aggregator operating companies, storage integrators and platform suppliers are the users.

This document specifies the system structure, normal operating conditions, functional

requirements, performance requirements, test and inspection of the centralized monitoring and

control system of distributed energy storage.

This document is applicable to the design, manufacturing, testing, operation, maintenance and

overhaul of the centralized monitoring and control system of distributed energy storage.

2 Normative References

The contents of the following documents constitute indispensable clauses of this document

through the normative references in the text. In terms of references with a specified date, only

versions with a specified date are applicable to this document. In terms of references without a

specified date, the latest version (including all the modifications) is applicable to this document.

GB/T 13729 Remote Terminal Unit Equipment

GB/T 36572 Guidelines of Cyber Security Protection for Electric Power System Supervision

and Control

GB 50229 Code for Design of Fire Protection for Fossil Fuel Power Plants and Substations

DL/T 634.5101 Telecontrol Equipment and Systems - Part 5-101: Transmission Protocols -

Companion Standard for Basic Telecontrol Tasks

DL/T 634.5104 Telecontrol Equipment and Systems - Part 5-104: Transmission Protocols -

Network Access for IEC 60870-5-101 Using Standard Transport Profiles

DL/T 860 (all parts) Communication Networks and Systems for Power Utility Automation

DL/T 2528 Basic Terminology of Electrical Energy Storage

DL/T 5149 Code for Design of Substation Monitoring and Control System

3 Terms and Definitions

What is defined in DL/T 2528, and the following terms and definitions are applicable to this

document.

3.1 centralized monitoring and control system of distributed energy storage

A system that performs centralized and real-time monitoring and control of one or above

distributed energy storage based on the application of computers, networks and communication

technologies.

4 Overall Requirements

4.1 The centralized monitoring and control system of distributed energy storage shall be

equipped with the application functions of data collection, real-time communication, operation

monitoring and operation control, etc.

4.2 The centralized monitoring and control system of distributed energy storage shall adopt a

hierarchical, classified and open system structure, and have scalability.

4.3 The centralized monitoring and control system of distributed energy storage shall have

redundancy configuration in key equipment and links, such as: servers, switches and

communication channels, etc.

4.4 The centralized monitoring and control system of distributed energy storage under the

dispatching command management by the power grid shall have the capability of exchanging

real-time information with the power grid dispatching system, and its security protection shall

satisfy the requirements of GB/T 36572.

5 System Structure

5.1 The centralized monitoring and control system of distributed energy storage consists of the

front-end convergence layer, the business processing layer and the resource storage layer. A

typical structure is shown in Appendix A. The functions of each layer are as follows:

a) The front-end convergence layer, which realizes the prepositive communication

function, includes prepositive servers and security gateway servers;

b) The business processing layer, which realizes application functions, such as:

operation monitoring and operation control, includes application servers and

workstations;

c) The resource storage layer, which realizes data storage function, includes database

servers.

5.2 The centralized monitoring and control system of distributed energy storage shall support

wired and wireless access. Those under wired transmission and configured with longitudinal

encryption devices shall be connected to the security zone I; those under wired public network,

wireless private network or wireless public network shall be connected to the security zone IV,

and a security access gateway should be set up.

storage system. For the content of information collection, see Appendix B.

7.1.2 The centralized monitoring and control system of distributed energy storage shall support

various types of communication protocols and the reception of multiple data types.

7.2 Alarm

7.2.1 The centralized monitoring and control system of distributed energy storage shall realize

hierarchical processing of alarm information in accordance with alarm levels, such as: accidents,

abnormalities, threshold-crossing, displacements and notifications, etc.

7.2.2 The centralized monitoring and control system of distributed energy storage shall be

equipped with the function of real-time alarm display. The display content should include level,

time, equipment, behavior and reasons.

7.2.3 The centralized monitoring and control system of distributed energy storage shall be

equipped with the function of retrieving alarm signals based on conditions.

7.3 Operation Monitoring

7.3.1 The operation monitoring content of the centralized monitoring and control system of

distributed energy storage shall include, but not be limited to the operation information of

equipment, such as: transformers, switches, knife switches, busbars, energy storage body and

energy storage converters, etc.

7.3.2 The centralized monitoring and control system of distributed energy storage shall be

equipped with the functions of dynamic coloring of graphics elements, dynamic flashing and

network topology, so as to realize intuitive monitoring of the operating status of distributed

energy storage.

7.3.3 The operation monitoring diagram of the centralized monitoring and control system of

distributed energy storage should include index diagram, main wiring diagram, interval diagram,

light plate diagram and network communication status, etc.

7.4 Operation Control

7.4.1 The centralized monitoring and control system of distributed energy storage shall be

equipped with the functions of controlling the start / stop / reset of energy storage converters,

adjusting the charging and discharging power of energy storage converters, connecting and

disconnecting grid switches, and adjusting the main transformer tap, etc.

7.4.2 The centralized monitoring and control system of distributed energy storage shall be

equipped with the function of active power adjustment and be able to issue active power control

commands in accordance with the demands for power grid dispatching.

7.4.3 The centralized monitoring and control system of distributed energy storage shall be

equipped with the function of reactive power adjustment, execute voltage adjustment strategies

in accordance with the voltage of the grid connection point, and issue reactive power control

commands.

7.4.4 The centralized monitoring and control system of distributed energy storage should be

equipped with the function of sequence control and cluster control.

7.4.5 The centralized monitoring and control system of distributed energy storage should be

equipped with the function of responding to and dispatching emergency control commands, and

be able to receive dispatching commands and issue remote charging and discharging commands.

7.5 Human-computer Interface

7.5.1 The real-time monitoring screen of the centralized monitoring and control system of

distributed energy storage shall support plant station diagrams, single-line diagrams, network

diagrams, geographical distribution diagrams, operating condition diagrams and

communication network diagrams, etc.

7.5.2 The centralized monitoring and control system of distributed energy storage shall support

the management and monitoring of the operating status of application software and

communication networks and be equipped with the function of self-diagnosis.

7.5.3 The centralized monitoring and control system of distributed energy storage shall be

equipped with the alarm function in the form of graphics, voice, text and printing, etc., and

support functions, such as: alarm query, customized alarm levels, alarm statistical analysis,

alarm confirmation and clearing, and sequence display of major events, etc.

7.5.4 The operation and control of the centralized monitoring and control system of distributed

energy storage shall be able to realize the functions of manual setting, signboard operation, lock

and unlocking operations, remote control and adjustment, and have corresponding authority

control.

7.5.5 The centralized monitoring and control system of distributed energy storage shall be

equipped with the functions of querying and accessing data, as well as the query function in the

mode of combined conditions.

7.6 Communication

7.6.1 The centralized monitoring and control system of distributed energy storage shall be

equipped with the function of communicating with the monitoring system of distributed energy

storage power station or the collection terminal.

7.6.2 The centralized monitoring and control system of distributed energy storage should be

equipped with the function of real-time communication with the power grid dispatching system.

7.6.3 The centralized monitoring and control system of distributed energy storage shall support

DL/T 634.5104, DL/T 634.5101, Modbus and DL/T 860 (all parts) protocol communication.

7.7 Security Protection

accordance with the demands, and support data export and printing.

7.11 Database Management

7.11.1 The database management of the centralized monitoring and control system of

distributed energy storage shall be equipped with the functions of database maintenance,

database synchronization, offline file saving, database backup and database recovery, etc.

7.11.2 The database of the centralized monitoring and control system of distributed energy

storage shall support providing a unified real-time or quasi-real-time data service interface to

the outside world in accordance with visitor permissions and access types.

7.12 Permission Management

7.12.1 The user permission management of the centralized monitoring and control system of

distributed energy storage shall grant personnel different permissions and permission validity

periods in accordance with different job functions and nature of work, including hierarchical

permission management, permission binding and permission configuration.

7.12.2 The user permissions of the centralized monitoring and control system of distributed

energy storage shall adopt hierarchical management. User passwords can be set, and

permissions can be assigned. In addition, based on the business demands, and in accordance

with the involved content of business, it shall perform password restrictions.

7.12.3 All operators logging into the system shall be authorized, authenticated for identity and

permissions, and use the specified system functions and scope of operations.

7.13 Equipment Management

7.13.1 Equipment management shall include ledger management, such as: item information,

public connection point, grid connection point, energy storage converter parameters,

installation capacity, item category, operation mode, and construction and operation

information, etc. of the distributed energy storage system.

7.13.2 Equipment management shall be equipped with the functions of recording and

performing statistics of the maintenance and failure times of the distributed energy storage

system.

7.14 Network Publishing

The centralized monitoring and control system of distributed energy storage should be equipped

with the functions of network publishing, such as: information release, browsing and

downloading of relevant data of the distributed energy storage system.

7.15 Equipment Status Analysis

7.15.1 The centralized monitoring and control system of distributed energy storage should be

equipped with the function of performing statistics and evaluation of the operation data, charge

and discharge times, depth of charge and discharge, and economic indictors of energy storage

equipment.

7.15.2 The centralized monitoring and control system of distributed energy storage should be

equipped with the function of analyzing and diagnosing the status of energy storage equipment.

7.15.3 The centralized monitoring and control system of distributed energy storage should be

equipped with the function of intelligent operation analysis.

7.15.4 The centralized monitoring and control system of distributed energy storage should be

equipped with the function of configuring operation, maintenance and overhaul strategies.