· 적정한 발전량을 추정(추정 전력량)
- 기온 및 일사량이 시시각각 변화하는 상황에서 지금 현재의 적정한 발전량을 추정
- 실제 발전량과의 추정치를 비교
· 회로를 차단 시키지 않고 측정 가능
· 시간경과에 따른 값의 변동 확인 가능
· 차폐판(masking shield)과 함께 사용하면 쉽게 고장난 스트링과 모듈 확인가능
· PV 모드에서도 클램프 및 온도 등 최대 7ch의 추가 입력 가능(추가 클램프 필요)
· PV 모드 off시 30ch의 데이터 로거로 사용 가능
· PV 모드 off시 옵션 입력 장치를 추가하여 최대 60ch
<iframe width="640" height="400" src="http://www.youtube.com/embed/2bMriVF1yXs?feature=player_embedded" frameborder="0" allowfullscreen=""></iframe>PV mode Basic specifications
Input
(Fixed channels)
(Automatic setting of conversion ratio) |
[unit1-ch1] Voltage measurement mode, 1 V f.s., 1,000 V conversion ratio
[unit1-ch2] Current measurement mode, 1 V f.s., 1,000 A conversion ratio
[unit1-ch3] Insolation measurement mode, 20 mV f.s., 140 kW/m2 conversion ratio
[unit1-ch4] Panel temperature measurement mode, K thermocouple 100°C f.s., 1°C conversion ratio
|
| Expansion channel settings |
[unit1-ch5] to [unit1-ch11] Select and add as voltage, thermocouple, or clamp (2,000 A, 200 A, 100 A, 20 A, 10 A).
*[unit1-ch12] to [unit1-ch15] and [unit2-ch1] to [unit2-ch15] cannot be used in PV mode. |
Equations
(Fixed channels)
(Automatic setting of equation) |
[W1] Power (kW) = Voltage (Ch. 1-1) × current (Ch. 1-2)
[W2] Power integration (kWh) = Voltage (Ch. 1-1) × current (Ch. 1-2) × measurement time (h)
[W3] Estimated power (kW) = Insolation strength (Ch. 1-3) / Gs (standard test condition of 1 kW/m2) × (1 + temperature loss*1) × (1 - coefficient for other losses) × photovoltaic cell rated output (kW)
[W4] Estimated integration (kWh) = Insolation strength (Ch. 1-3) / Gs (standard test condition of 1 kW/m2) × (1 + temperature loss*1) × (1 - coefficient for other losses) × photovoltaic cell rated output (kW) × measurement time (h) *1 Temperature loss = Photovoltaic cell maximum output temperature coefficient × (panel temperature (Ch. 1-4) - 25) / 100
[W5] AC estimated power (kW) = Estimated power (w3) × power conditioner conversion efficiency (reference value)
[W6] AC estimated integration (kWh) = Estimated energy (w4) × power conditioner conversion efficiency (reference value)
[W7] Estimated power approximation rate (%) = Energy (w2) / estimated energy (w4) |
| Display |
PV Wave + Value, PV Wave + Crsr, Gauge + PV Wave, PV Value, Estimate Power, AC Estimate (reference values) |
| Other specifications |
Functionality is identical to that of the LR8400-20 when PV mode is OFF. |
Applications 
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