一, Disparities between overall architecture and system definition
The rectifier, battery pack, inverter, and static switch are the main parts of the UPS system, which is basically a power protection device. Its operation is as follows: when the mains power is normal, it is powered by the mains power and charges the battery; when the mains power is abnormal (such as a power outage or voltage fluctuation), the system instantly changes to the battery power supply, seamlessly protecting the load.
A more complicated energy system, the photovoltaic energy storage system usually consists of solar modules (PV), energy storage batteries, energy storage inverters (PCS), and energy management systems (EMS). In addition to supplying electricity during blackouts, this system can take part in the daily scheduling of power generation, storage, and consumption.
�� In other words:
"Power guarantee equipment" is what UPS stands for.
One type of "comprehensive energy system" is photovoltaic energy storage.
二,Functional positioning: Passive emergency vs active management
UPS was initially intended to handle unexpected power interruptions, and its "passivity" in functioning is evident. The UPS only operates when there is an irregular power supply and is typically in standby or charging mode.
Photovoltaic energy storage devices, on the other hand, can run continuously. Photovoltaic power generation is utilized to charge the battery and give power to the load during the day. Energy Storage Battery is discharged at night or during periods of high electricity demand. In order to achieve electricity optimization, the EMS system is utilized to intelligently dispatch electricity at the same time. The primary distinction is found in:
The "power outage" issue is resolved by UPS.
The issue of "where does electricity come from and how to use it more reasonably" is resolved by photovoltaic energy storage.
三,Sustainability and Energy Sources
The UPS system's battery energy is solely derived from mains power; it is not capable of producing electricity on its own. As a result, UPS continues to rely on conventional power grids from the standpoint of energy structure.
Solar energy, a sustainable energy source that can both greatly lower carbon emissions and lessen reliance on the electrical grid, is introduced via the photovoltaic energy storage system. In the current global environment of carbon neutrality, this is especially crucial.
�� From a sustainable development standpoint:
UPS: an addition to conventional power systems
An essential part of the energy system of the future is photovoltaic energy storage.
四,Power supply capability and system scalability
Usually employed to enable data storage or system switching for minutes to hours, UPSs are made as short-term power supply devices with limited capacity and power supply time.
Systems for photovoltaic energy storage have very adaptable growth potential:
Depending on need, the battery's capacity can be expanded.
able to sustain a full-day operation or a long-term power supply
In off-grid situations, it can serve as the primary power source.
UPS prioritizes "instantaneous protection."
The focus of photovoltaic energy storage is "continuous energy supply."
五,Power supply quality and response speed
UPS's incredibly quick response time, which can typically finish switching in milliseconds and produce steady voltage and frequency output, is one of its greatest benefits.
High-performance PCS enables modern photovoltaic energy storage systems to respond quickly as well. Certain systems can even go close to UPS switching performance. In the meantime, the majority of commercial and industrial applications can be satisfied by its output power quality.
�� Although the performance difference between the two is closing due to technical developments, UPS still has the upper hand in situations requiring very high reliability.
六, Investment Value and Economy
As protective equipment, UPS typically falls under the category of "cost input" and is primarily useful for preventing losses rather than making money.
Additionally, photovoltaic energy storage systems have clear financial advantages:
Peak-valley electricity price arbitrage
Lower demand for power costs
Boost the percentage of impulsive self-use
Engage in trading on the electricity market in certain areas
�� In terms of money:
A "cost centre" is UPS.
One "revenue asset" is photovoltaic energy storage.
What are the advantages of generators compared to photovoltaic energy storage?
一,The structure of energy and the environment
Diesel generators run on fossil fuels, and when they do, they release a lot of carbon dioxide and other hazardous gases into the air, which harms the environment.
PhotovoltaicEnergy Storage Battery employ solar power to make electricity. This is a common clean energy solution that doesn't pollute much when it's running.
�� The worldwide "dual carbon" aim is what drives this:
Generator slowly limited
There are many policy benefits to photovoltaic energy storage.
二, Costs of running a business and the economy
The major problem with generators is that they always need fuel:
Prices for fuel change a lot
Cost of long-term use is high
You can't disregard the costs of running and maintaining it.
The initial cost of photovoltaic energy storage systems is significant, but their running expenses are very cheap.
No charges for fuel
Low cost of upkeep
Long life span In the long run:
The total cost of ownership (TCO) for photovoltaic energy storage is far cheaper than that of generators.
三,Stability and dependability in operations
The generator is a piece of machinery that has challenges like wear and tear and ageing. The level of maintenance has a big effect on how reliable it is.
The solar energy storage system is made up mostly of power electrical devices and a battery management system (BMS). This makes the whole system work more smoothly and reliably. The benefits of photovoltaic energy storage are most clear in regions that are not manned or are far away.
四,Speed of response and power supply that doesn't stop
When you first turn on the generator, it normally takes a few seconds or longer to get stable power. This is why you often need to utilise it with a UPS in situations where the load is very important.
Photovoltaic energy storage systems can switch power supplies in milliseconds and respond very quickly. When you need a lot of electricity all the time:
There are other benefits to photovoltaic energy storage.
五,Noise and where it will be used
The generator makes a lot of noise when it runs, and it also vibrates and releases exhaust fumes. It is not good for regions with strict environmental standards.
Photovoltaic energy storage systems work silently and don't pollute the air, which makes them better for:
school, hospital, business building, and residential area
六,Complexity of operations
The generator needs frequent care:
Come on, change the oil and check the mechanical parts.
Automated management is the main way the photovoltaic energy storage system works:
monitoring from afar
auto-run Easy to keep up with
�� It can greatly lower the costs of running and maintaining a business and the need for workers.
七. Function expansion and value of use
The generator's job is rather basic; it mostly serves as a backup power source.
Photovoltaic energy storage systems can do a lot of things:
filling up the valleys and cutting down on the peaks
Arbitrage of electricity prices
Increase the efficiency of energy use. Support microgrids. In addition to "backup," its value is also shown in "daily optimisation."
八,Comparison of safety
The generator has to store fuel, which might be dangerous because it can catch fire or leak.
The photovoltaic energy storage system can have multi-layer safety control thanks to the BMS and system protection mechanism. This makes the system safer overall (as long as it is designed well).
