GB/T 50293-2014 English PDF (GBT50293-2014)

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GB/T 50293-2014: Code for planning of urban electric power
GB/T 50293-2014
NATIONAL STANDARD OF THE
PEOPLE’S REPUBLIC OF CHINA
UDC
P GB/T 50293-2014
Code for Planning of Urban Electric Power
ISSUED ON: AUGUST 27, 2014
IMPLEMENTED ON: MAY 1, 2015
Jointly issued by: Ministry of Housing and Urban-Rural Development of
the People's Republic of China;
General Administration of Quality Supervision,
Inspection and Quarantine of the People's Republic of
China.
Table of Contents
Foreword ... 4
1 General Provisions ... 7
2 Terms ... 8
3 Basic Requirements ... 10
4 Urban Electricity Load ... 11
4.1 Urban Electricity Load Classification ... 11
4.2 Urban Electricity Load Forecast ... 11
4.3 Load Forecast Index ... 12
5 Urban Power Supply Sources ... 14
5.1 Urban Power Supply Sources Type and Choice ... 14
5.2 Power Balance and Power Source Layout ... 14
5.3 Urban Power Plant Plan Layout Principle ... 15
5.4 Urban Power Source Substation Layout Principle ... 15
6 Urban Power Network ... 17
6.1 Plan Principle ... 17
6.2 Voltage Rank and Level ... 17
7 Urban Power Supply Facility ... 19
7.1 General Requirement ... 19
7.2 Urban Substation ... 19
7.3 Switching Station ... 21
7.4 Ring Main Unit ... 22
7.5 Public Distribution Room ... 22
7.6 Urban Power Circuit ... 23
Explanation of Wording in This Code ... 26
List of Quoted Standards ... 27
2 Terms
2.0.1 Urban electricity load
The sum of active powers consumed practically by all electricity users at certain
time in city or urban planning area.
2.0.2 Load coincidence factor
The ratio of the integrated peak load of the power system to the sum of all
respective peak loads in all sub-areas (or all users and substations) within the
specified time period.
2.0.3 Load density
The quantization parameter characterizing the load distribution density,
measured by the average electrical power per square kilometer.
2.0.4 Urban power supply sources
The generic term of power plants which supply powers to city and substations
which receive powers from power system beyond the municipal administrative
area.
2.0.5 Urban power plant
All power generation facilities occupying independent lands for planning and
development within the city.
2.0.6 Urban substation
Substation and supporting facilities configured for transforming voltages,
exchanging powers as well as collecting and distributing electricity in urban
area.
2.0.7 Urban power network
The generic term for power networks at all levels for supplying power to urban
users in urban area.
2.0.8 Distribution room
The distribution site with low voltage load, equipped with medium voltage
distribution incoming and outgoing lines (few outgoing lines allowed),
distribution transformers and low voltage distribution devices and mainly for
distributing powers to low voltage users.
3 Basic Requirements
3.0.1 Urban power plan shall meet the general requirements of regional power
system planning and coordinate with urban master plan.
3.0.2 Urban power plan compilation stage, period and scope shall be consistent
with urban planning.
3.0.3 Urban power plan shall be compiled by urban planning and power sectors
through negotiation according to the conditions of the local city in terms of
property, scale, national economy, social development, regional energy
resource distribution, energy structure and power supply and in combination
with the recent construction schedule of power development planning and the
corresponding significant power facility projects.
3.0.4 Arrangement of urban substations, power lines and various power supply
facilities shall meet the relevant requirements of GB 8702 “Regulations for
Electromagnetic Radiation Protection” and GB 9175 “Hygienic Standard for
Environmental Electromagnetic Waves”.
3.0.5 Interference and influence on ambient environment from operating noises
generated as well as waste water, exhaust gas and waste residue discharged
from various power facilities newly built under planning shall meet the relevant
requirements of laws and regulations concerning national environmental
protection.
3.0.6 Urban power plan compilation process shall coordinate with planning for
road traffic, greening, water supply, drainage, heat supply, fuel gas and
communication, all of which shall be arranged comprehensively and share the
space(s), and mutual influence and contradiction shall be dealt with properly.
4 Urban Electricity Load
4.1 Urban Electricity Load Classification
4.1.1 Urban electricity loads shall be classified according to urban development
land property and consistent with the urban development land classification
specified in the current national standard GB 50137 “Code for Classification of
Urban Land Use and Planning Standards of Development Land”. Classified by
industry and household electricity, the urban electricity load may be classified
into electricity respectively for primary industry, secondary industry and tertiary
industry as well as electricity for urban and rural residents living.
4.1.2 Urban electricity load may be classified into general load (uniformly
distributed load) and point load according to urban load distribution features.
4.2 Urban Electricity Load Forecast
4.2.1 Power planning load forecast at urban master planning stage should
cover:
1 Peak load planned for municipal administrative area and urban center;
2 Annual total power consumption planned for municipal administrative
area and urban center;
3 Load density planned for urban center.
4.2.2 Power plan load forecast at urban detailed planning stage should cover:
1 Peak load within detailed planning scope;
2 Load density within detailed planning scope.
4.2.3 A main method supplemented with other forecast methods shall be
determined for urban electricity load forecast to check.
4.2.4 Load coincidence factor shall be determined according to power load
characteristics for power networks in various areas.
4.2.5 Selection of urban electricity load forecast should meet the following
requirements:
1 Electricity load forecast method at urban master planning stage should
be per capita power utilization index method, lateral comparison method,
electricity elasticity factor method, regression analysis methods, growth rate
method, load density method for unit development land and unit consumption
method.
5 Urban Power Supply Sources
5.1 Urban Power Supply Sources Type and Choice
5.1.1 Urban power supply sources may be from urban power plant and power
substation receiving the power system beyond the municipal administrative
area.
5.1.2 Urban power supply sources shall be selected economically and
reasonably by performing comprehensive research on the energy resources
condition, environmental conditions and exploitation and utilization conditions of
the local area.
5.1.3 For large cities by electrifying to system or supplying power hydraulically,
local power plants with proper capacity shall be planned to construct so as to
ensure urban electricity safety and the demand for peak regulation.
5.1.4 For cities with sufficient stable cold and thermal loads, power supply
planning should be combined with heating (cooling) planning, and power plants
for combined cooling, heating and power, with proper capacity shall be
constructed and meet the following requirements:
1 For cities where power supply is mainly realized by coal (fuel gas), coal-
fired (fuel gas) power plants for co...