Solar inverter shall realize the highest efficiency in wide power range conditions. Meanwhile, using a solar inverter shall meet the strict safety requirements. The property of the solar inverter is essentially determined by the accurate measurement of basic electricity. The safety criteria that shall be followed by solar inverter designers may become stricter and stricter. For instance, just like the limit on the input of DC power into the grid, some consensus may be reached on the allowable total harmonic wave of the solar inverter output current. By far, many different local limitations are put forward based on the layout situation. Thus, it requires that when the power grid frequency is greatly higher than 50Hz or 60Hz, the current shall be measured accurately.
In the solar PV grid system, the solar module, inverter, and power grid can constitute the electrical system. The component will convert the solar energy based on the solar radiation and then the inverter will output related power. Thus, an on-grid inverter does not have special demand on the AC overload because basically, the inverter output power will not exceed component power. In the solar PV off-grid system, components, batteries, inverter, and load constitute the electrical system. The output power of the inverter is decided by the load. The start power of the motor of some inductive-load devices like air conditioners or water pumps is 3-5 times the rated power. Thus, the off-grid inverter has special requirements for overload situations.
Solar pump inverter is used to control and regulate the operation of solar water pump system (PV pumping system). It can convert the DC from the solar array into AC to drive the water pump. In addition, it can adjust the output frequency in real time according to the sunlight intensity so as to achieve maximum power point tracking (MPPT). Solar pump inverter is one of the various types of power inverters. Its function is similar with the function of common on grid inverter. The two inverters are both used to convert solar DC into AC. But the solar pump inverter is greatly improved. Thus, it can greatly save the system cost and can expand the solar energy application range.
Full name of the micro inverter is micro solar on grid inverter. It generally refers to inverters with power below 1500W and module-level MPPT. It is mostly used in photovoltaic power generation systems. Micro is relatively small compared to traditional centralized inverters. The micro inverter inverts each component. Its advantage is that each component can be independently controlled by MPPT, which can greatly improve the overall efficiency. At the same time, micro inverter can also avoid the DC high voltage, poor light effect, and wooden barrel effect of the centralized inverter. Micro inverters manage the collection of solar energy at the level of a single panel to improve the efficiency of the solar equipment, rather than working in the entire system like a central inverter. In the past, in order to ensure maximum power output during solar energy harvesting, the complex control mechanisms used increased costs and restricted the acceptance of micro-inverters. Complex and cost-effective IC and processor-based solutions can handle the logic control of micro inverter designs. Various voltage controllers and regulators also provide complementary solutions for solar panel DC output power generation.
The inverter plays an important role in the photovoltaic grid-connected system design. It can convert the solar energy into DC energy and then invert it to the single-phase AC energy that can be applied by various devices.
The micro inverter technology means the technology of directly connecting inverter with single PV module. Each PV module can be equipped with an inverter that can realize AC-DC conversion and can track the maximum power point. It can directly convert the power generated by PV module into the AC energy so that it can realize AC load purpose or it can be transmitted to the power grid.
In the solar PV grid tie system, the power of photovoltaic module is related to the inverter. The power matching between PV modules and solar grid tie inverters is not in a relationship of 1:1 fixed ratio, so it needs to be considered comprehensively based on the specific conditions of the project. The main influencing factors include irradiance, system loss, component installation angle, efficiency and life span of the on grid inverter, etc.
Inductor heating is one of the common faults in the use of sine wave inverters. There are two problems resulting to inductor heating: excessive loss on the inductor and poor heat dissipation conditions. The best way to solve the serious problem of heating is to start from the perspective of loss (inductance loss and magnetic core loss).
Centrifugal pump is a pumping machine that uses the centrifugal movement of water to work. Its basic components are a high-speed rotating impeller and a fixed snail-shaped pump casing. Generally, centrifugal pumps have several (usually 4-12) impellers with backward curved blades fastened to the pump shaft, and the impeller is driven by the motor to rotate at a high speed along with the pump shaft.
Do you accept to receive a quote for installing a new bathroom in your house via phone call without the installer visit to your house? Of course, the answer is No. That is same like installing a solar photovoltaic system on your house roof, it’s a must for the solar installer to come the house and check/inspect all your private circumstances and conditions, and absolutely not sufficient to get a quote via phone or internet email.
In the realm of renewable energy and sustainable power solutions, inverters play a pivotal role in converting direct current (DC) generated by solar panels or wind turbines into alternating current (AC) for use in homes, businesses, and industries. Two primary types of inverters dominate this landscape: on-grid inverters and off-grid inverters. Each serves distinct purposes and operates within different contexts. Inverter.com will introduce on-grid inverters and off-grid inverters, and discuss the working principles of off-grid inverters and on-grid inverters, as well as their differences.
As to the optimization of the efficiency and reliability for solar photovoltaic system, a rather new means is to use the micro inverter, which shall be connected to each solar panel. Equipping a separate micro inverter for each solar panel can make the system adapt to changing loads and weather conditions, thereby providing the best conversion efficiency for a single panel and the entire system. The micro-inverter architecture can also simplify wiring, which means lower installation costs. By making consumer solar power systems more efficient, the time required for the system to get back the initial investment in solar technology will be reduced.
Inverter is commonly used in the industrial field and its main function is to convert the current in a certain way. Transformer is a device that can change the AC voltage based on the electromagnetic induction principle. It is mainly composed of primary coil, secondary coil and iron core (magnetic core). To make it easier to understand the inverter, hereby the difference between inverter and transformer will be discussed.
Solar panel delamination: This phenomenon occurs when the bond between the solar panel glass on the front, and plastic on the rear is disconnected, because this will let the air and moisture to creep internally in the solar panel causing corrosion, and soon failure. Bond disconnection is resulted from using bad plastic materials with low thermal characteristics, or non-clean plastic / glass or using inferior manufacturing machine with poor pressure and temperature.
As the energy constraint becomes increasingly evident, the solar PV power generation system attracts growing attention. The direct current generated by solar cells and wind-powered generators should be inverted by inverters before being combined to the grid. Therefore, the design of solar on grid inverters determines whether the solar PV system will operate reasonably, efficiently, and economically. The control circuit, signal gathering circuit, and the switching tube drive circuit of solar on grid inverters need different adaptive power supplies. Thus an independent power supply should be provided for powering these circuits. The voltages of the designed auxiliary power supplies include +15V, -15V, and +5V. A single-ended flyback DC/DC topographical structure is adopted, with stable and reliable operation.
The AC voltage overrange is the most common failure of the solar inverter connected with the PV grid system. This is because the grid voltage is not constant and it will change with the changing of the load and current. At the same time, the output voltage of the inverter will be affected by the grid voltage. When the grid encounters abnormal situation, the inverter power supply shall be stopped to avoid more serious damage on the grid.
Inverter is a device that can convert DC (direct current, such as storage battery) into AC (alternating current/mains), which is widely used in air conditioners, computers, lighting and other electrical appliances. Especially on traveling or working, inverter can generate alternating current by being connected with batteries, so as to supply power for the instruments or electrical appliances requiring alternating current for use.
It is very easy to change alternating current (AC) into direct current (DC), and with only a diode, the simplest rectifier circuit can be formed. However, it is not that simple to change direct current to alternating current. The magnitude and direction of alternating current will change periodically over time. The mains power we use shows regular changes of sine function.
As a critical component of the entire solar PV power generation system, the solar inverter is a power electronic circuit that converts the direct current emitted by the solar array into the alternating current to power the AC load. The solar inverter has two primary functions: Firstly, to provide electricity for the AC load to complete the DC/AC conversion. Secondly, to find the optimal workplace to optimize the solar PV system's efficiency. The solar PV system works with an optimal voltage and current at specific solar radiation, temperature, and the solar cell to generate electricity at the maximum power. Therefore, when selecting a solar inverter for PV power generation system, it should meet the following 6 features: reasonable circuit structure, a wide range of DC input voltag, high efficiency, high reliability, pure sine wave and high overload capacity.
A sine wave inverter is a kind of common inverter. Sine wave inverter is a power electronic device that can convert DC (direct current) electric energy (such as power batteries, storage batteries) into AC (alternating current). The sine wave inverter outputs pure sine wave current, it is compared with a modified wave inverter. Inverter and AC-DC converter are opposite processes. AC-DC converters or power adapters rectify will convert current into direct current, while inverters will have the opposite effect. So it is get the name.
As we all know, there are two kinds of electricity: one is direct current (DC), such as electricity from batteries and mobile phone chargers, and its waveform is a straight line; the other is alternating current (AC), which is 220V/110V for household use. The alternate means that its amplitude is periodic, with positive and negative changes. Sine wave is like a wave, rising and falling. Generally, the waveform of alternating current changes according to a sine function, so it is called a sine wave. The function of the sine wave inverter is to convert direct current (linear) into alternating current (sine wave).
With advances in solar photovoltaic technology, many technical terms, in addition to solar power generation systems, PV sunshine rooms, PV greenhouses, and other civilian projects, have taken a deep root in residents' life. For instance, many purchasers ask questions when buying an inverter, for example, how many circuits of MPPT does this inverter has? What the power-generation efficiency is like? Although many people are aware of the MPPT function, they are unclear about the circuit's working principles. This paper will briefly introduce the DC-DC conversion circuit, a vital component of MPPT.
Power inverter has many specifications, and these specifications usually include rated power and peak power. The rated power is the continuous output power, which refers to the power that the inverter keeps working for a long time. The peak power is the starting power, which is generally twice the rated power. It is mainly used to meet the instantaneous peak value when individual home electrical appliances are started. For example, for a power inverter with 2000 watts continuous power, its peak power can reach 4000 watts. Therefore, for an inverter, its peak power must be able to meet the instantaneous power when the home appliance starts to ensure normal operation. When selecting an inverter, its power should be higher than the starting power of the home electrical appliances used. When working, the inverter itself consumes part of the power. Its input power is greater than its output power. For example, if an inverter inputs 100 watts of direct current and outputs 85 watts of alternating current, its efficiency is 85%.
