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Malaysian Grid Code

YB Dato' Sri Peter Chin Fah Kui, Minister of Energy, Green Technology and Water recently launched the MalaysianGrid Code and Distribution Code for the nations electricity supply activities in an event on 21 Dec 2010.

The Grid Code and Distribution Code, publ ished by the Energy Commission Malaysia, is a regulatory instrumentmuch needed to coordinate various electricity supply activities. The former is a technical specification which definesthe parameters an electricity generating plant and grid system network have to meet to ensure proper functioningof the electrical grid.

The following figure illustrates how the various parties identified in the Grid Code are connected or associated withGrid System.

The Grid Code is a set of technical regulations used by utili ty companies such as Tenaga Nasional Berhad (TNB) andIndependent Power Producers (IPPs) in the Peninsular Malaysia that serves as the main guidelines in electricitysupply operation; to ensure the electricity supply in Peninsular Malaysia remains reliable.

The following figure illustrates the Peninsular Malaysia electricity industry structure in terms of functions as used inthe Grid Code.

The Distribution Code is a set of technical regulation established to make certain the operations at the distributionlevel are being carried out systematically.

The Codes will set the regulations and technical requirements that need to be carried out by all party involved inthe planning, managing and maintaining the grid and distribution systems to ensure security, safety and reliabilityat all time.

The following shows the structure of the Power System, connected Parties and applicable codes:

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ysian Grid Code | Tenaga Nasional Berhad http://www.tnb.com.my/business/malaysian-grid-

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The Codes highlight in details the roles and responsibilities of parties involved in managing or using the system,either through connecting or connected directly to the grid and distribution systems including generators, gridsystem operators, distribution system operators, single buyer and large power consumers.

The Energy Commission Malaysia as the regulatory body of the energy industry; wil l chair the committee withmembers from the industry. It has been enforced since 1 January 2011.

Click here to down load the Mala ysian Grid CodeClick here to downloa d the Malaysian Grid Code

The Grid Code is divided into the following parts:

Part I :

Glossary and Definitions:- contains definitions of some terms used in the Grid Code to ensure clarity to the meaning and intention of thoseterms

Part I I :Introduction and Purpose:- provides a general introduction to the Grid Code, its purpose and general requirements

P ar t I I I :General Conditions:- deals with all administrative aspects of the Grid Code, provisions for the revision of the Grid Code as well as resolutionof disputes and procedures associated with derogations and exemptions

Part I V:Planning Code:- describes the process by which the Grid Owner undertakes the planning and development of the Grid System in the planningtimescales and the provision and supply of certain information by Users and the Grid Owner to enable this process

Part V:Connection Code:- specifies the minimum technical, design and operational criteria which must be complied with by Users connected orseeking connection or seeking to modify their connection to the Grid System

Part VI :Operation Code:- deals with all processes associated with Operational Planning and Control Operation of the system in real time andobligations of the Users to provide and supply information to the Grid Owner and GSO to enable those processes

Part VI I :Scheduling and Dispatch Code:- contains preparation of an indicative Least Cost Generation Schedule indicating which Generating Units maybe instructed or dispatched, the issuance of Control, Scheduling and Dispatch instructions to Generating Units, and the procedures and

requirements in relation t o control of system f requency control and interconnector power transfers.

P ar t V I I I :Data Registration Code:- sets out a unified listing of all data required by the Grid Owner and GSO from Users, and by Users from the Grid

Owner and GSO

Part I X:Metering Code:- deals with transmission metering at the Connection Points and at the interface with the Generation, Distribution and User

Systems

ysian Grid Code | Tenaga Nasional Berhad http://www.tnb.com.my/business/malaysian-grid-

10/8/2012