MPPT photovoltaic inverter ( Solar controller) Group list of advantages

The full name of the MPPT controller 'maximum power point tracking (' 最大功率点跟踪) Solar controller, is a traditional solar charge controller the upgrading of products. MPPT photovoltaic inverter is valued to the core technology, choose different MPPT routes, has a certain influence on system output. From the perspective of solve the problem of mismatch, a group behind the MPPT string as little as possible; From the stability and efficiency, a MPPT the group behind the string of the more the better, because the more MPPT system cost is higher, the stability is poor, the more loss. Inverter manufacturers today about group list of advantages. A, less MPPT group list many advantages: 1) There is interference function loss: many MPPT algorithm, observation method, the incremental conductance method, incremental conductance method, etc. , either by an algorithm, by continuous change of dc voltage, to judge the strength of the sun changes, therefore there are errors, such as when the voltage is in the best working point actual, will try to change the voltage inverter, is to determine the best working point, many MPPT all the way, will be more than a loss. 2) For measuring loss: MPPT, photovoltaic inverter need to measure current and voltage. In general, the greater the current, the greater the anti-interference ability, the less error. 3) Circuit loss: MPPT circuit has an inductance and a power switch tube, loss at run time. MPPT goes, the more the greater the loss, in general, the greater the current, the inductance can be made smaller and the less the loss. Second, the MPPT multiple sets of series of less advantage: 1) Each MPPT photovoltaic inverter circuit is running independently, each other. Set of string can be different types, different quantity, also can be a different direction and tilt Angle, thus group fewer, more system design flexibility. 2) Reduce the dc side fuse failure: photovoltaic (pv) system is one of the most common fault is the dc side, a MPPT configuration 1 to 2 set of string, even if a short-circuit components all the way, will not exceed 15% of the total current, so don't need to configure the fuse, fuse common failure modes are divided into current fuse, fuse of ageing, thermal fuse. Over current fuse is in overload, short circuit and so on more than happen protective fuse rating; Aging fuse is to point to in the long-term work, the same as their own aging, loss of river closure, in the absence of flow fault fusing; Fuse current and temperature has a great relationship, fuse if working under high temperature, intercepting ability to drop, down fusing possibility is larger. 3) Accurate fault location: photovoltaic inverter independent detection for each input voltage and current, all the way to the real-time sampling group string of current, voltage, timely found the problem such as line fault, component failures, keep out. Compared group list, meteorological condition comparison, comparison of historical data, etc. , improve the detection accuracy. 4) Matching power optimizer is more suitable for: at present in the component end eliminate mismatch effects of one of the solutions is to use the power optimizer, photovoltaic optimizer can according to the requirements of the series circuit, high current, low current can be converted to the final will be the power of the optimizer outputs in series and connected to the inverter, multiple groups access optimizer, according to the principle of parallel connection circuit voltage is consistent, when a group of string all the way by shadow block led to the decrease of the power, the optimizer to change the voltage, the circuit can reduce the total voltage, also affects the same other MPPT circuit voltage drop, resulting in a decline in power.
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Overall, custom inverter may be a great way for manufacturers to expand their use of technology, but the price could present a significant hurdle for some businesses.