1. Requirements to draft technical project

Requirements to draft technical project of electrical part of the
Requirements to draft technical project
Technical project about the electrical part of the connecting power station which must
be composed according to the requirements presented in the current document will be
delivered to the network operator for approval. Project of Electrical part must be
delivered before the construction of the electrical installation and at least 3 months
before energizing the connection point. The decision regarding approval will be
informed by the transmission system operator during 30 days after the project was
delivered to the network operator.
The content of the technical project is described in section 4 of the current document
„Instructions to draft technical project“.
In agreement with the TSO, technical project could be delivered for revision in
sections. All sections are subject to the same requirements as the technical project in
general. It is not allowed to divide the technical project into smaller sections than the
subsections described in the instructions to draft technical project.
In case of dividing the technical project into sections, the Client is required to hold
summary schedule of delivery of the technical project where the delivery of each
section with the delivery date will be marked. While delivering the project in sections
it is necessary to consider the integrity of the whole technical project (headings,
numeration, corner letters of drawings). The Client is also obliged to deliver a
complete technical project. Individual sections of the project must be labeled
according to their comprise in the project. Updated sections must be labeled so that it
is clearly understandable which section they substitute.
Client is obligated to implement corrections into technical project within 30 days
since receiving the remarks made by transmission system operator. Updated technical
project is then to be redelivered for revision to the transmission system operator.
Calculations of the earthing network must be presented in case the earthing loop of
the electrical installations of the Client is electrically connected to the earthing loop of
substation or of the line belonging to the transmission system operator.
Specifications and schematics of the selected devices as well as of the associated
devices, their qualifying requirements, relevant standards and requirements specified
in the current document must be taken into consideration in calculations.
Figures, schematics, tables
IEC standards must be taken into account while choosing drawing methods and
symbols in schematics. Drawing methods and symbols in schematics must correspond
to IEC standards.
Units of measure must be in SI-system. (International System of Units)
Numeration and labeling of schematics and drawings must be logical and
unambiguous throughout the entire document.
Primary schematics and (schematics of protection placement) protection equipment
layout drawings should be presented in single-line diagram.
Label data of all communication devices and instrument transformers must be
Layout drawing
Following layout drawings must be composed for substation:
 layout of all equipment and buildings in substation (whole territory of
 layout drawing (ground plan and cross-section) of 110 kV–330 kV switchgear
equipment of the client, where the interdevice connections and overall
dimensions are indicated.
 longitudinal profiles of overhead line lead-in between terminal tower and
portal support
 drawing of cable line inlet and connection to the connection point, where the
cross-sections of the cable line location are indicated.
All devices on drawings must be labeled.
3.2 Relay protection settings of generators, connection transformers and/or –lines
Client is obliged to deliver relay protection settings of all electrical installations from
generator up to the connection point.
Instructions to draft technical project
Client is obliged to describe implementation of technical solutions stated in the supply
service agreement by the transmission system operator.
Client is obliged to draft technical project which consists of the following sections:
4.1. Requirements to draft primary part of the technical project
Primary part of the technical project must include:
 General sections – short description;
 Rated values, climatic conditions for the following electrical installations;
o Electric power plant(s)
o Linking(s) to the connection points
o Standby supply connections
o Substation(s)
 Primary schematics up to connection point (Single line diagram);
 In case of wind power station connected to the distribution network, primary
schematics from connection point up to electrically connected substations of
the transmission system operator, including standby supply connections, is
 Location diagrams;
 General plans of substation, layout drawings – connection point only;
Earthing loop calculations, including step voltage and contact voltage calculations (in
case the earthing loop of the electrical installations of the Client is electrically
connected to the earthing loop of substation or of line belonging to the transmission
system operator);
 110 – 330 kV cable pipe system scheme, layout drawing
 110 – 330 kV overhead line drawings, layout drawing
o rated voltage
o line length
o locations of the towers and all parallel lines within 100 meters of the
line are required to be displayed schematically;
o longitudinal profile including crossings with other structures;
o tower types (including schematics);
o conductor (and/or cable) and shield conductor type and electrical
 Lighting protection – specification and layout of protection zones;
 110 or 330 kV circuit breaker nameplates;
 110 or 330 kV disconnector nameplates;
 110 or 330 kV current transformer nameplates;
 110 or 330 kV voltage transformer nameplates;
 110 or 330 kV power transformer nameplates
o Parameters and characteristics of the transformer and manufacturer;
o Type of the transformer
o Rated voltages of the windings, control range of the voltages
o Rated power of the windings;
o Transformer vector group;
o Short circuit impedance(s);
o Zero sequence impedance(s).
 Final data of the electrical power plant
o According to connection agreement
o Type test reports
o Reports of tests made on location (delivered within 6 months from
o Description of central control system of the power station
o Model (planned parameter) including descriptions and block diagrams
of control and automation of the power plant (incl PSS/E and PSCAD
models in electronic form), verified models (incl PSS/E model in
electronic form) delivered within 6 months since syncronising.
 Descriptions of functions along with settings
o Primary control
o Secondary control (active power control via telecontrol within predetermined speed and range)
o Active power control
o Exciter*, reactive power control, voltage automatic control with
reference to connection point
o Stabilizer* (PSS)
 Report on cooperation imitation of electrical power network and electrical
power plant
o Applicant is required to deliver a report of the results of computer
simulation of cooperation of electrical power network and power
station in transient and steady-state operation.
*– in case of synchronous generators operating synchronously with the network.
4.3. Requirements to draft the secondary section of the technical project
Secondary section of the technical project must contain the description and overview
of the secondary system, schematics, RTU data, including transmitted signals,
measuring and controls. For every 110-330 kV feeder, schematics explaining
secondary circuits must be delivered, irrespective of identical connections. All
schematics must be unambiguously explicable. Secondary section of the project must
contain at least the following subjects:
1. General – short description;
2. Primary circuit;
3. Secondary circuits:
Current and voltage circuits, ratios;
Protection, control, measuring, alarm and pilot circuits;
Placement of equipment and connections in circuits so that
interapparatus connections and functions are coherently visible; type of
protection relay and automation must be indicated next to the name of
the device;
 Block diagram of control interblocking logic in case the transformer of
the client is connected to the substation of the transmission system
 Fundamental parameters, markings and manufacturers of the devices
must be indicated on the schematics;
 All protection settings of all electrical installations from generator up
to the connection point.
4. RTU drawings, schematics and tables
Client is obliged to deliver telematics block diagram of RTU wherein types of
communication, rates, types, protocols and tables of signals of RTU and of devices
connected directly or indirectly to RTU are indicated.
The names of signals, values, data types, priorities, references, IEC addresses,
groupings etc., must all correspond to the requirements revised previously by the
transmission system operator (volume of data, controls, measuring, signals).
Documentation must be delivered on paper and on CD, primary and secondary parts
of the sections of the client and of the transmission system operator binded in separate
Only one-sided printing is permitted. Single-line diagrams must be at least in the A3
Digitally delivered documents must be in the following formats:
 Text documents – Microsoft Word *.doc format
 Tables – Microsoft Excel *.xls format
 Drawings, schematics - *.dwg or *.pdf format
 Data volume table – Microsoft Excel 2000 *.xls format
 PSS/E model in version 31 *.dyr format and PSCAD model *.psl and *.psc
(pslx and pscx) format.
Transmission system operator must have the possibility to copy and print the
electronic documents.
The name of the electronically delivered file must contain the same notation used in
corner letters in the heading of the document. Electronically delivered document must
be categorized in accordance with topics, bays, equipment, voltages, etc., into
directories corresponding to the copies presented on paper.
All drawings, schematics, signal lists etc., must be equipped with corner letters
indicating the name of the Client, name of the project, name of the engineer/designer,
name of the transmission system operator, date, etc.
During any latter changes of the project, the date of change and version must be added
to the drawings.