Smart PV Power Plant Solution Series Report 3 - Safety
In today's society, traditional energy sources are depleted and the human ecological environment is deteriorating. Solar photovoltaic power generation has become the focus of attention due to its advantages such as abundant resources, cleanliness, and no restrictions on the geographical distribution of resources. In recent years, China's photovoltaic industry has developed rapidly. According to national planning goals, by 2015 solar power will reach 15 million kilowatts, and the annual power generation will be 20 billion kilowatt-hours. There are more and more photovoltaic power stations built, how to improve the safety of the power station, and how to prevent various hidden dangers in safety, has also become the primary consideration for power station owners.
According to the actual business data of the German “Mannheimer Versicherung Insurance Company†in the field of photovoltaics, it can be seen that the overvoltage and the number of fire accidents in the photovoltaic power plant account for more than half of the total amount, which not only results in huge loss of economic benefits, but also brings about the owner’s brand reputation. Great negative effect.
It can be seen that the photovoltaic power plant security problems mainly exist in two aspects: 1. Man-made and other intentional destruction or theft; 2. A series of accidents caused by technical failures such as fire. Safety is the primary productivity of the power station. The primary task of the power station is safety and reliability. It cannot pose a threat to property and personal safety. Unilateral pursuit of low cost will result in greater losses. There are more and more power stations with potential quality problems. The traditional centralized power station has not been very well promoted in terms of safety issues. The main reason is that the entire design of the station is intrinsically deficient, and Huawei's smart photovoltaic power plant solution has taken into consideration all aspects of the safety of the photovoltaic power station and has given The effective prevention measures will smash safety hazards in the cradle.
Huawei Smart Photovoltaic Power Plant Solutions Active Safety
According to statistics, more than 80% of the power stations are currently on fire due to faults on the DC side, especially component hot spots, DC short-circuits, quality problems of DC distribution cabinets, and fuse issues. In the roof power station, the issue of DC arcing is unavoidable, and all the houses can only be burned. A lot of similar accidents have occurred overseas.
Traditional centralized power stations have hidden dangers such as fire in complex lighting conditions and rooftop environments due to DC distribution cabinets and DC combiner boxes, long DC transmission distances, and fragile components such as fuses. Reducing the distance of DC transmission and achieving active safety, DC's safe transmission and protection are both important and difficult. The intelligent photovoltaic power station adopts no DC bus design, and the DC output from the string directly enters the inverter and inverts into AC power for long-distance transmission. It actively avoids the safety and protection problems caused by DC transmission, and reduces the potential safety hazards caused by DC arcing. Make the power station safer.
In addition, the problem of component power attenuation caused by PID is more and more serious. At present, the traditional centralized power station uses the negative plate grounding method to prevent PID problems. As a result, high voltage is formed between the positive electrode of the battery plate and the PE. If you accidentally touch the positive electrode of the battery plate, electric shock will be caused to the personnel. At the same time, the ground fault of the cable between the positive plate or the string of the battery plate will generate a fault current or arc through the earth wire. Discharge can easily cause fire. Huawei's intelligent photovoltaic power plant solution uses software to set up a virtual positive (negative) voltage circuit in the system so that the negative electrode of the battery plate does not need to be grounded to realize positive pressure on the ground and effectively avoid the PID effect. Since the negative electrode of the battery plate does not need to be grounded, In addition, the residual current monitoring circuit inside the inverter can cut off the circuit within 150ms when the leakage current is detected to be greater than 30mA, thereby achieving active safety.
Huawei's Smart Photovoltaic Power Plant Solution to Build Sites and Manage Safety
Huawei's smart PV power plant solution does not require a civil engineering room to reduce environmental damage to vegetation and soil. Civil engineering facilities reduce the construction safety factor; electromagnetic radiation is small, and human health is protected; there are fewer equipments to be maintained and fewer failure points. Smart photovoltaic power plants have achieved a harmonious coexistence between humans and the environment, which has greatly increased the scope of application of photovoltaic power plants and created conditions for PV homes.
At the same time, the wireless solution can combine real-time video surveillance with a multimedia scheduling platform. The fixed video surveillance image can be forwarded to the handheld terminal in real time. The inspection personnel can view the area where any camera is located anytime, anywhere. The safety management of the power station.
Today, security has become the most essential element of successful investment. Only under the premise of ensuring safety, photovoltaic power plants can continue to develop healthily. Huawei's smart photovoltaic power plant solutions are safe from site building, construction, operation and maintenance, management, and products, laying a solid foundation for 25 years of maximum revenue protection.
Naips LED Emergency Ceiling Light-A power failure light with a modern design that provides high quality lighting with an adjustable cct color switch attached to each fixture. Every round light fixture is pre-installed with the built-in lithium ion emergency batterry pack, damp location rated for reliability, ETL listed for your safety, is 85-265V AC input, has a brushed chrome finish, and backed by a 5 YEAR WARRANTY.
Led Emergency Ceiling Light,Emergency Led Ceiling Light,Emergency Light For Ceiling,Emergency Light Ceiling Type
Foshan Nai An Lighting Electric Co.,ltd , https://www.ledpowerpack.com