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Table 2.3.4.1: Voltage limits on switching of load Load Starting/Switching Limit of Voltage Change Starting/switching once or twice a year 6% Infrequent single starting/switching or disconnection of Load – once in two hours or more hours. Including capacitor or reactor bank Frequent starting/switching and/or disconnection of Load (e.g., Many times in a day) 3% 1% 2.3.5 Voltage Fluctuations and Flicker 2.3.5.1 The limits of Flicker that are acceptable on the distribution system are in accordance with the “Engineering Recommendation P28, Issued by The Electricity Council of UK in 1989 entitled Planning Limits for Voltage Fluctuation Caused by Industrial, Commercial and Domestic Equipment in the United Kingdom”. TNB uses the procedures contained in this document to plan the connection of Fluctuating Loads and applies the limits therein in measuring and monitoring the levels of Flicker at such points of connection. 2.3.5.2.2 In accordance with the “Engineering Engineering Recommendation P2”, P2”, voltage fluctuations at a Point of Common Coupling with a fluctuating Load directly connected to the Distribution System shall not exceed: (a) % of the voltage level for step changes, which may occur repetitively. Any large voltage excursions other than step changes or less frequent step changes may be allowed up to a level of 3% provided that this does not constitute a risk to the distribution system or, in TNB’s view, any other party connected to the distribution system. (b) The planning limits for the Short and Long Term Flicker Severity applicable for Fluctuating Loads connected to the distribution system are as set out in the table below. TENAGA NASIONAL B E R H A D 33
Table 2.3.5.2 : Maximum allowable flicker severity TNB distribution system Voltage Level at which the Fluctuating Load is Connected Absolute Short Term Flicker Severity (P st ) Absolute Long Term Flicker Severity (P lt ) 500, 275 and 132kV 1.0 0.8 Less than 132kV 0.8 0.6 2.3.5.3 In connecting a Fluctuating Load at a particular point or Point of Common Coupling it is necessary to assess the total Flicker due to the Fluctuating Load itself and the background Flicker measured at that point. In assessing the total Flicker TNB shall use the so called “RSS Rule”. This assessment is carried out by the RSS Rule by obtaining the sum of the squares of the Flicker from the Fluctuating Load and the background Flicker, with the square root of this sum yielding the total assessed Flicker at that Point of Common Coupling due to the specific Fluctuating Load and the background Flicker at that point. 2.3.5.4 Connection of more than one Fluctuating Load at the same Point of Common Coupling or addition of further Fluctuating Load at the same location is carried out on a “first come first served” basis on the distribution system. This means that whilst the first Fluctuating Load may be within the allowable Flicker limits and not require any Flicker mitigation or compensation equipment, the second Fluctuating Load which may cause violation of Flicker limits will be obliged to invest in appropriate Flicker mitigation or compensation equipment. At the planning stage, in carrying out the assessment of the total Flicker due to more than one Fluctuating Load connecting at a particular Points of Common Coupling, TNB shall use the methodology described in P28. 2.3.5.5 In assessing the level of Flicker due to a Fluctuating Load at the planning stage the assessment will be carried out at a realistic System operating condition giving the minimum number of connections with which that point on the System can be operated within normal voltage limits and following Secured Contingency Events. This condition shall be considered as representative of the type of System conditions under which the Flicker due to a Fluctuating Load will be at its highest value as the voltage fluctuations due to the Fluctuating Load will be at their highest level under such conditions. 34 TENAGA NASIONAL B E R H A D
Page 2 and 3: Vision To be among the leading c
Page 4 and 5: CONTENTS SUPPLY APPLICATION 1.0 Ten
Page 6 and 7: 1.0 TENAGA NASIONAL BERHAD ELECTRIC
Page 8 and 9: e) Elektrik Bestari TNB provides el
Page 10 and 11: 1.10 Types Of Supply Application Al
Page 12 and 13: 1.18 Tariff Please refer to the Tar
Page 14 and 15: 2.4 TNB Supply Lead Time The flowch
Page 16 and 17: Stage Description 2 TNB Register Ap
Page 18 and 19: Steps Action Reference 2 After appr
Page 20 and 21: Steps 7 8 Action Advise applicant t
Page 22 and 23: CONTENTS Page 1.0 PLANNING FOR C
Page 24 and 25: 1.1.1.1 Technical Requirements For
Page 26 and 27: Should a preliminary examination of
Page 28 and 29: • Capacitance connected in parall
Page 30 and 31: SECTION 2.0 PLANNING AND DESIGN CRI
Page 32 and 33: For the purpose of this guideline,
Page 36 and 37: 2.3.5.6 If under the operating cond
Page 38 and 39: Table X: Planning Levels for Harmon
Page 40 and 41: 3) At the terminals of a Customer
Page 42 and 43: 2.5.3 Protection System Evaluation
Page 44 and 45: 3.2 Group Diversity Group diversity
Page 46 and 47: - 132/33kV, 2 x 90 MVA - 132/22kV,
Page 48 and 49: The establishment of transmission m
Page 50 and 51: CONTENTS Page ABBREVIATIONS .......
Page 52 and 53: 1.0 GENERAL REQUIREMENTS 1.1 All th
Page 54 and 55: ii. iii. iv. The tickness of board
Page 56 and 57: 4.0 GROUP METERING FOR WHOLE CURREN
Page 58 and 59: v. The panel cover and metal plate
Page 60 and 61: 6.2 Specifications For Metering PTs
Page 62 and 63: 6.7.2 Outdoor Breakers A ‘marshal
Page 64 and 65: GLOSSARY AND DEFINITIONS In this gu
Page 66 and 67: Embedded Generating Unit A generati
Page 68 and 69: Protection Protection Apparatus Pro
Page 70 and 71: Appendix Topic Page 1 List of Kedai
Page 72 and 73: Appendix 1 List of Kedai Tenaga in
Page 74 and 75: Appendix 1 List of Kedai Tenaga in
Page 76 and 77: Appendix 3 PERMOHONAN BEKALAN ELEKT
Page 78 and 79: Appendix 5 TENAGA NASIONAL B E R H
Page 80 and 81: Appendix 7 PART B : TNB SUPPLY APPL
Page 82 and 83: Appendix 9 JOINT MEETING ACTION LOG
Page 84 and 85:
Appendix 11 SAMPLE OF APPOINTMENT L
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Appendix 12 Load Category Total lig
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Appendix 13 LOCATION PLAN TENAGA NA
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Aku Janji dan Tanggungrugi *Pemilik
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Appendix 16 Demand forecast and sub
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Appendix 17 SUBSTATION LAYOUT DRAWI
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Appendix 18 SITE PLAN / LOCATION PL
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Appendix 18 LOGO DETAIL FOR DOUBLE
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Appendix 19 (Drawing 7B) MV/HV, 1 O
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Appendix 19 (Drawing 7D) 3 FEEDER M
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Appendix 19 (Drawing 7F) MV/HV, 3 F
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Appendix 19 (Drawing 7H) 1, 2, 3 OR
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Appendix 19 (Drawing 7J) 1, 2, 3 OR
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Appendix 20 TENAGA NASIONAL B E R H
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Appendix 22 DRAWING NO 2A : SINGLE
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Appendix 23 DRAWING NO 3A : OUTDOOR
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Appendix 25 DRAWING NO 4A : 3 PHASE
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Appendix 25 DRAWING NO 4C : 3 PHASE
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Appendix 26 DRAWING NO. 4E TENAGA N
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Appendix 27 DRAWING NO 5A : SINGLE
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Appendix 27 DRAWING NO 5C : SINGLE
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Appendix 28 DRAWING NO 5E: 3 PHASE
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Appendix 29 TENAGA NASIONAL B E R H
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