13 ربط الطاقة الشمسية بالشبكة

SECTION 13

SOLAR ENERGY CONNECTION TO GRID


1301 This section regulates the large scale solar energy generation when the client intends to connect it to the
MEW grid.

1302 The solar energy systems for grid connected systems shall be connected only at the main low tension
panels of the distribution substations/transformers, or for smaller projects at the main electrical switchboard.

1303 The client shall engage an international consulting firm for the design of the solar energy systems that
has a minimum five (5) years of experience in the relevant field and designed not less than 10 MW of PV power
systems in total in the last five (5) years.

1304 Only one or two large sized inverters shall be located in the Air -Conditioned Electrical Rooms of the
Distribution Substation. A series of small sized inverters for solar energy system is not acceptable.

1305 The detailed design drawings for the solar energy systems for grid connected systems shall be submitted
for MEW approval to the concerned department of the Ministry.

1306 All solar energy generation calculations and other electrical design calculations including calculations
for connecting cables sizing for the solar energy systems shall be submitted detailing different design
parameters.

1307 The overall solar energy system of the project shall be summari zed to include particulars like, Nos. of
solar panels/modules, their sizes and capacities, details of inverters, available solar energy, etc. and submitted in
excel sheets so as to obtain complete information on the solar energy system at a glance.

1308 There shall be two circuits to disconnect the solar energy systems in case of grid power failure: -

One circuit with the inverter.

Second circuit with a separate control to disconnect the breaker available at the connection point of the
solar power to the MEW network.

On availability of power supply, the circuit with the inverter shall be automatically connected with a
time delay of 2 to 3 minutes and the breaker for the second circuit shall be automatically connected
with a time delay of five (5) minutes.

1309 The protection system shall include a power quality meter t o monitor the quality of power generated and
to disconnect the power supply in the events of:

Operating voltage is greater than 260 V phase to neutral.
Operation voltage is less than 220V phase to neutral.
Operating frequency is greater than 52 Hz.
Operating frequency is less than 48 Hz.
Total harmonic distortions exceeding 5%.





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1310 The solar energy systems shall be provided with necessary energy metering (KW -Hour) at the
connection point of the Solar Power to the MEW network. The metering system must be approved by MEW.

1311 The testing and commissioning of the solar energy systems shall be done by the client through an
accredited and approved third party specialized in PV solar system and must be audited by MEW Engineer.

1312 It is the client who will be fully responsible for occurrences of any accidents during the operational life
time of the solar energy system. The client is also responsible for proper maintenance and operation of the solar
energy system.

1313 A yearly inspection shall be carried out by the client through an accredited third party inspector like,
Lloyd‟s Register, Bureau Veritas, Vecto Inspection, Germanischer Lloyds or equally approved Third Party
Inspector and Inspector‟s Certificate shall be provided to MEW.

1314 The Contractor shall submit all final as-built drawings for the solar energy systems to MEW for approval
and record purposes.










































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