In addition to the DC-AC conversion function, the solar grid tie inverter shall also own the solar cell array MPPT function and various protection function. The solar cell array delivers power energy to the power grid through sine wave PWM inverter. The power sent from the solar on grid inverter to power grid is determined by the solar cell array power and local sunshine conditions of the specific time. Now, power inverter technology becomes very mature. The work principle: When the power supply of the utility grid is stopped, the grid side will stay in short-circuit status. At this time, the grid tie solar inverter will start self-production function because of the overload problem. When the overload situation is detected by the microprocessor, it will block the SPWM signal and will trigger the circuit breaker connected with the power grid. If the solar cell array can output energy, grid tie solar inverter will operate separately, which can be controlled easily. It only needs to know the negative feedback status of the AC voltage. The microprocessor will detect the output voltage of solar grid tie inverter and compare it with the reference voltage (normally is 220V). Then, it will control the PWM output duty cycle to realize inverting and stable-voltage operation.
What is the difference between power inverter and frequency inverter? The detail analysis of inverter and frequency inverter is as following.
What is a power inverter?
Power inverter is a device that can convert DC (the battery and accumulator jar) into AC (normally the sinusoidal wave of 220V and 50Hz). It is composed of inverter bridge, control logic and filter circuit. In fact, it is a voltage inversion process with the adapter. The adapter converts the AC voltage of the mains power grid into a stable 12V DC output, while Inverter converts the 12V DC voltage output by the Adapter into high-frequency high-voltage AC. Now, the inverters generally use PWM pulse width modulation technology to obtain high-power, high-efficiency AC inverter output.
The working conditions of centrifugal pumps are generally harsh. Affected by environmental conditions, mechanical vibration and other factors in the working process, its technical status will undergo different changes. The maintenance of the water pump is to tighten and adjust the place that should be tightened and adjusted before the normal technical state of the unit itself is damaged. In addition, it is necessary to change the lubricating oil promptly to maintain normal lubrication conditions; frequently observe various instrument monitoring devices. If any problem is found, the fault should be eliminated in time, so that the unit is always working in good technical condition. Only in this way can the service life of the water pump unit be prolonged and the unit can work with high quality and high efficiency.
It's a tradeable certificate represents CO2 emission saving resulting from installing a small scale solar system, its issued and awarded from a government body, called clean energy regulator. In other word, it's a measure of how much CO2 emission your solar system installation will save.
When your small scale solar system installed, calculations will be done by clean energy regulator to indicate how many STCs can be created over the whole life time of your solar system, and of course this is also a measure of how much renewable energy your solar system will generate.
In gross metering, the whole solar system generated electricity will go to the grid, and you will get paid for it as a form of credit shown in the electricity bill. In other word, we can say that in gross metering, it measures the entire output energy separately from your energy consumption, and you pay for electricity bill (energy consumption), and get paid for exported energy, in where no relation in between them “no net”.
Basically, the solar panels are mainly consisting of several small solar cells connected electrically to each other in series. When the solar cell subjected to sunlight, it will generate direct current electricity (DC voltage), then the solar inverter takes the DC electricity and converting it to alternating current electricity (AC voltage). This AC energy will flow through your home electrical distribution panel, and distributed to flow through different branches/wires to operate your home different electrical appliances/equipment. And the following are the main 3 steps in how the solar panels will work for our home:
After installing the solar system, your electrical energy meter will need to be changed to accommodate the new installation, and the question is; who will be responsible of such changeover? Is it you or solar installation company or electricity company? This point must be clear from the beginning, and usually the solar company will do that job under the supervision of the electricity company.
The solar system rebates that you will get from the solar installation company as a result of selling your STCs certificate is an important point to be discussed, so you will be aware of how mush discount you will get from such STCs certificates.