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Solar inverter substation SIS

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Solar inverter substationSolar inverter substation SIS– is the pre-assembled substation of container-type for placing of electrical equipment – for control system, inverter, MV-transformer and distributiom devices.

Information for order of soalr inverter substation

 

 

Diagram of solar inverter substation

Structure of solar inverter substation

SIS is structurally devided into following functional parts: Details of construction

  • container;
  • power conversion system;
  • auxiliaries.

Container is a metal sheath, which serves to assembly of electronic and electric equipment, and its protection from environmental influence.


Power convertion system – is a complex of electronic and electric equipment, which serves to power reception and conversion with voltage up to 1000 V of direct current from photovoltaic power systems in electric power of three-phase voltage 10 kV (35 kV), 50 hz of alternating current , and for delivery of generated electricity into the national network.

PCS consists of:

  • ABB inverters;
  • step-up transformer wth the split windinsg;
  • flow-through switchgears of  medium voltage.

Auxiliaries – is electronic and electric equipment, which serves to power supply of SIS-auxaliaries, and for control of additional SIS-equipment.

SIS-performance is available on the base of metal containers and monoblock concrete containers.

Functions of Solar inverter substation

Solar inverter substation implements following main functions:

  • automatic generation of electric current by the prescribed algoritm;
  • fulfilling of pritection and lock functions;
  • synchronization to the line;
  • compulsory checking of condition of main electrical equipment status and its parameters;
  • process and alarm signaling in case of extraordinary situation or critical process parameters;
  • access to the generating, storing and data transmissioning process about technical process tj the dispatch center screens, and printing of information in a user-friendly format;
  • consumption and production records of electric power.

 

Structure of Solar inverter substation

Solar inverter substation consists of main equipment for energy conversion, and optional equipment for SIS auxiliaries.

Main equipment for energy conversion – inverters, transformer, medium-voltage switchgear.
Optional equipment - automatic load transfer cabinet, auxiliary power supply cabinet, microclimate system, smoke detection system, indoor lighting.

Usage conditions of Solar inverter substation

Solar inverter substation is performed in climatic version У1 defined in the standard GOST 15150, GOST 15543 and are designed to be used in following conditions:

Parameter name Value
Ambient air temperature -35 °С up +45 °С
Relative air humidity 100%
Height above sea level no more than 1000 m
Environment Nonexplosive and nonflammable; doesn’t contain current-conducting dust, aggressive gas and vapours in concentration, which corrodes metals and insulation (atmosphere of I and II types, defined in the GOST15543.1 and 15150 standards)
Seismic resistance  defined in the standard GOST 17516.1 on MSK 64 scale up to 8 points
Fire safety rating F1
Fire resistance rating on СНиП 21-01-97 No more that  III
Lightning protection category II
Protection rating defined in the standard GOST 14254 not less than IP33
Mechanical fulfillment group in the standard GOST 17516.1 40
Reliability requirements comply with GOST 20.39.312

 

Overall dimensions of solar inverter substation

 

Type of container Overall dimensions (mm) Coverage (м2) Weight of empty container
Length Width Height
Monoblock concrete container CK72 7200 2500 3550 18 24000
Metal container MK1 8200 2850 3470 23,37 6200
Metal container MK2 8200 2850 3470 23,37 6200


Monoblock concrete container SISMonoblock concrete container SIS is a monoblock concrete construction, which is devided by diaphragms into sections. Every section has its doors and ventilating grill.

Metallic container SIS is presented by two functionally completed modules - warm and cold, which are as-installed assembly units. Металлический контейнер СИП

Warm module SIS – inverter room with artificial system of microclimate maintenance (cooling, ventilation and heating system).

Cold module SIS – transformer cabin and Switchgear Rooms of medium voltage.

SIS has metal supporting frame, building envelopes are made of metal shaped steel with nonflammable mineral wool heat insulator.


Cooling, ventilation and heating system serves to microclimate maintenance, ventilation of transformer cabin. In rooms of high voltage units is natural ventilation used.

Modularity of SIS-container

Modularity of SIS-container

Arrangement of equipment of substantion

Arrangement of equipment of substantion

Electrical parameters of solar inverter substation

№ п/п Name of parameter Value
1 Manufacturing company of inverter ABB ABB
DC side (terminating side)
2 Input voltage DC, В 450…750 450…825
3 Maximum input voltage DC, В 900В (option 1000В) 900В (option 1000В)
4 Critical current (Imax (DC)), А 1145 х 2 1145 х 2
5 Number of protected entries (in parallel), off 40 (+/-) х 2 40 (+/-) х 2
6 Surge protection Class 2 Class 2
7 Connection cablе, ring lug cablе, ring lug
8 Maximal cut of connecting cable, mm2 185 185
9 Screw connection size M12 M12
10 Tightening torque, nm 70 70
11 Sealed input number, off 28 28
12 Maximal cable diameter,mm 22 22
АС side  (outgoing side)
13 Output voltage АС, кВ 10 35
14 Line frequency, hz 50 50
15 Rating capacity, kW 1000 1000
16 Current distortion, % <3 <3
17 Earthing concept TN / IT TN / IT
18 Surge protection Class 1/2 Class 1/2
19 Connection cablе, ring lug cablе, ring lug
20 Connection type through-type through-type
21 Maximal cut of connecting cable, mm2 300 300
22 Screw connection size М12/М16 М12/М16
23 Tightening torque, nm 70 70
24 Sealed input number, off 6 6
25 Maximal cable diameter,mm 47 47
Auxiliary power supply
26 Input voltage АC, В 380 380
27 Line frequency 50 50
28 Rated input kW 11,5 16,8
29 Earthing concept TN-S TN-S
30 Surge protection Class 2 Class 2
31 Connection Cable, tubular lug Cable, tubular lug
32 Maximal cut of connecting cable, mm2 16 95
33 Sealed input number, off 2 3
34 Maximal cable diameter,mm 22 33
SGCB-Network
35 Network type Current loop Current loop
36 Surge protection Class 2 Class 2
37 Connection Cable, tubular lug Cable, tubular lug
38 Connection type Star Star
39 Maximal cut of connecting cable, mm2 1 1
40 Sealed input number, off 32 32
41 Maximal cable diameter,mm 12 12
Ethernet-Network
42 Network type Ethernet Ethernet
43 Connection Cable Cable
44 Connection type Star, Bus Star, Bus
45 Cable type Optics Optics
46 Sealed input number, off 2 2
47 Maximal cable diameter,mm 12 12

 

Solar inverter substation implements following main functions:

  • automatic generation of electric current by the prescribed algoritm;
  • fulfilling of pritection and lock functions;
  • synchronization to the line;
  • compulsory checking of condition of main electrical equipment status and its parameters;
  • process and alarm signaling in case of extraordinary situation or critical process parameters;
  • access to the generating, storing and data transmissioning process about technical process tj the dispatch center screens, and printing of information in a user-friendly format;
  • consumption and production records of electric power.