HSC1000C
1 MW SOLAR STATION (CONCRETE)
Container with DC-distribution, Inverters, Medium-Voltage Transformer and Switchgear
The solar station HSC1000C is a new development for large photovoltaic power plants. The container is made of concrete and includes the DC-distribution, the inverter, the medium voltage transformer and the medium voltage switchgear on a length of only 7.38 m (about 24 ft). The HSC1000C is a plug and play solution for quick installation with low total costs. The HSC1000C is a completely factory-assembled system—only the DC-connections to the photovoltaic array and the AC-connection to the medium-voltage grid have to be done on site.
The photovoltaic array is linked via fuses or circuit breakers and an EMC-filter to the input of the inverter. As an
option, the current in each string (fuse) can be measured separately.
The inverter system consists of two identical inverters. These inverters operate independently and feed their output power into different low-voltage windings of a special medium voltage transformer T1 (please refer to the block diagram below), optimised for the photovoltaic array. The container is connected to the grid via the internal medium-voltage switchgear. Optionally, the auxiliaries of the inverter system and the heating can be fed by transformer T2 or from an external source.
Each inverter is supplied with all necessary control systems and has its own maximum-power-point tracker. As standard, a PC-based monitoring system with an Ethernet interface provides all important information to the user. In the unlikely case of malfunction, a failure message is generated and sent automatically. Optionally the communication can be realised via GSM modem.
HSC1000C Block Diagram
TECHNICAL DATA OF THE HSC1000C
Electrical Data
| Rated AC-power | 1000 kW | at ±10 % of rated grid voltage |
| Maximum AC-power | 1100 kW | at rated grid voltage |
| Rated grid voltage | 20 kV, 3-phase, 50 Hz/60 Hz | Other voltage levels and frequencies on request. |
| Maximum AC-current | 31.8 A | |
| Line power factor (cos φ) | > 0.98 | at rated power |
| AC-current distortion (THD) | < 3 % | |
| Rated PV-power | 2 × 515 kW | within ±10 % of rated grid voltage |
| Maximum PV-power | 2 × 575 kW | at rated grid voltage |
| Maximum PV-current | 2 × 1230 A | |
| Maximum PV no-load-voltage | 900 VDC | |
| MPP-area | 450 VDC...820 VDC | at rated PV-power |
| Control strategy | MPP tracking | |
| Efficiency | (96.3|97.6|97.7|97.3|97.1) % | at (10|30|50|75|100) % power |
| EU efficiency | 97.3 % | transf. losses incl., aux. power not incl. |
| EU efficiency | 97.1 % | incl. transformer and auxiliary losses |
| Feed-in starting at | 1000 W | |
| Standby losses | 80 W + 1100 W | Control power + transformer losses |
| Maximum auxiliary power | < 2500 W | + heating (if necessary) |
General Data
| Ambient temperature | 0 °C...50 °C (32 F...122 F) | Others on request. |
| Relative humidity | < 95 % | Non-condensing |
| Maximum altitude | 2000 m above sea level | without derating in power |
| Cooling type | Forced air cooling | |
| Minimum air quality | Class 3S2 | According to EN60721-3-3 |
| Protection class | IP54 | |
| Dimensions (H × W × D) | 7380 mm × 2680 mm × 3200 mm | |
| Weight | < 38.000 kg | |
| Colour of cabinet | Washed-out concrete | Different surfaces on request. |
| EMI | Complies EN61000-6-2, EN61000-6-4 | |
| Grid quality requirements | Complies EN50178 | |
| Grid monitoring | Complies VDEW requirements | |
| CE-conformity | Complies |
Features
| Disconnector DC | Motor driven disconnector |
| Display | Touch screen with numerical and graphical display |
| Earth leakage detection | Earth leakage monitor on DC-side |
| Surge arresters | With monitoring on AC- and DC-side |
Options
| • Up to 120 inputs, protected by DC-fuses or DC circuit breakers • Measuring and monitoring of every single input current • Heating • External heat exchanger for very dusty/humid environment and extreme climatic conditions • Air dehumidifier inside the converter room. |
