Sakarwa na Photovoltaic (PV) Don Yakin Kirki
Sakarwa na photovoltaic (PV) don yakin kirki, wanda ake kira sakarwa na PV don yakin kirki ko kuma sakarwa na PV AC interface, shine kayan kwabtaka mai amfani a cikin masana'antar tashar rarraba PV. An haɗa shi da takardun kan kayayyakin DC wanda ake samu daga tashar rarraba PV zuwa AC kuma yakin shi zuwa grid.
Abubuwa Masu Yawa na Sakarwa na PV Don Yakin Kirki:
Ingantaccen Tushen DC: Samun kayayyakin DC wanda ake samu daga PV modules, kafin yakin shi da ƙarin DC cables.
Inverter: Yanayin kayayyakin DC zuwa AC. Rating, voltage da abubuwan da suka fi sani a inverter ya kamata zama da muhimmanci saboda hanyar takarda na system.
Ingantaccen Tushen AC: Yakin kayayyakin AC daga inverter zuwa grid ta hanyar AC switching devices, wanda ke taimakawa yakin shi zuwa grid.
Kayan Amsa: Sakarwanta tana da kayan amsa masu yawa kamar overcurrent protection, overvoltage protection, da short-circuit protection don taimakawa amfani da safe da stable operation.
Devices na Control da Monitoring: An haɗa shi da systems na control da monitoring don taimakawa amfani da supervision da management of operational status, measurement da recording of electrical parameters, da kuma taimakawa remote monitoring da management functions.
A cikin haka, sakarwa na PV don yakin kirki tana da muhimmanci a kan yanayin kayayyakin DC daga tashar rarraba PV zuwa AC kuma yakin shi zuwa grid. Shi ne wanda yake zama daya daga abubuwan masu yawa a cikin masana'antar tashar rarraba PV.
II. Testin Sakarwar PV Don Yakin Kirki
Testin sakarwar PV don yakin kirki an yi har da bayanin da wannan ita ce shi yana ba da design specifications da kuma taimakawa amfani da delivery da safe da reliable power daga tashar rarraba PV zuwa grid. Abubuwan da ake testa sun hada da:
Basic Function Test: Bayyana amfani da fundamental functions kamar startup/shutdown, voltage regulation, frequency regulation, da harmonic filtering.
Power Quality Test: Assess whether the power quality at the output meets grid standards and requirements, including parameters such as voltage stability, frequency stability, and harmonic content.
Grid-Connection Test: Connect the cabinet to the grid to evaluate grid synchronization performance and stability, including grid connection/disconnection switching, reverse current protection, and overvoltage protection.
Complex Operating Condition Test: Simulate the cabinet’s operation under various conditions to verify its reliability and adaptability in different environmental and load scenarios.
Fault Response Test: Evaluate the cabinet’s response to fault conditions such as overload, short circuit, and ground faults.
Safety Test: Assess safety performance, including insulation resistance, grounding integrity, overtemperature protection, and overvoltage protection.
Data Recording and Analysis: Record and analyze various parameters during testing to evaluate the cabinet’s performance and operational behavior.
Waɗannan tests sun yi da qualified technicians da kuma bayanin da suka fi sani a cikin safety regulations da testing standards. Duk da haka, results of the tests serve as the basis for acceptance and commissioning of the PV grid-connection cabinet, ensuring its safe and reliable operation and power delivery to the grid.
III. Integrated Monitoring of PV Grid-Connection Cabinets
Integrated monitoring of PV grid-connection cabinets typically includes the following aspects:
Electrical Parameter Monitoring: Monitor electrical parameters such as current, voltage, and power in the cabinet, as well as the output power and current from PV modules. This is achieved using current sensors, voltage sensors, and power sensors, with data collected and recorded via a data acquisition system.
Energy Data Collection: Monitor and record the energy output of the cabinet, including generated power, current, and voltage.
Temperature Monitoring: Monitor internal and external temperatures of the cabinet, including those of cables, switching devices, and transformers. Temperature sensors are used to collect data, which is then transmitted to the data acquisition system for recording and analysis.
Remote Signaling (Telemetry): Monitor the status of switches and fault signals to provide real-time awareness of equipment operation. This is achieved using remote signaling sensors and switch status monitoring devices.
Remote Control (Telecontrol): Enable remote operation of the cabinet, allowing operators to control and intervene via a remote control center, facilitating remote management of the PV system.
Data Acquisition and Analysis: Use data acquisition devices to transmit collected data to a central system for processing and analysis, generating monitoring reports and trend charts to support timely maintenance and management decisions.
Alarm and Fault Diagnosis: Provide real-time alarm functions. When equipment abnormalities or faults (e.g., overtemperature, overload, short circuit) are detected, the system automatically triggers alarms and offers diagnostic capabilities to assist in rapid fault identification and resolution.
Remote Monitoring and Management: Enable remote monitoring and management via network connectivity, allowing users to view equipment status, receive alarm notifications, and perform remote operations and debugging anytime, anywhere. Features include remote switch control, fault diagnosis, and alarm alerts.
The integrated monitoring system can display the cabinet’s operational status in real time through displays, computer terminals, or mobile apps. It also provides historical data logging and analytical reports to assist operations and maintenance personnel in making informed decisions. Through comprehensive monitoring of the PV grid-connection cabinet, the efficiency of the photovoltaic power generation system can be improved, equipment lifespan extended, and grid safety and power quality ensured.
