Provide independent power systems design and independent electric power systems installation solutions, and talk about photovoltaic modules, inverters and system maintenance in power systems engineering
1.Inverter power supply The continuous output power of the inverter indicates the power that the inverter can provide during standard operation. This is very important for inverter selection. Under operating conditions, the peak load requirements of the system at external rated temperature shall be met. The inverter used in Australia shall indicate the continuous output […]
Inverters generally have multiple protection circuits. 1. Reverse polarity protectionReverse polarity protection prevents improper connection to the battery, albeit at the cost of reduced efficiency, but is still valuable for mobile applications. It should be noted that not all inverters have reverse polarity protection. 2. Overload protectionThe most important thing for overload protection is to […]
There are mainly two different criteria for distinguishing the types of inverters. 1. The way of converting direct current to alternating current1) Rotary inverters (motor inverters) Before the advent of solid-state inverters, 240V alternators driven by DC motors were widely used to convert between DC and AC. This conversion method benefits from the mechanical inertia […]
Of further concern in AC systems are the reactive elements (inductive and capacitive elements in sinusoidal AC circuits). Reactance can be either capacitive or inductive, but no work is done by current flowing through either type of reactance. The electrical power in a DC circuit is equal to the product of the voltage and the […]
Loads composed of purely resistive elements (resistive loads) can be powered by DC, so there is no need to use an inverter. However, due to the large power consumption of resistive loads, the use of such loads should be limited in independent power supply systems, including electric heaters, kettles, water heaters, electric irons, and hair […]
1. single stage voltage sensing controllerSingle-stage voltage sensing is often referred to as a hysteresis controller or dual voltage point controller, which operates with reference to the battery terminal voltage. When the voltage rises to a set value, the controller disconnects the power supply; when the voltage drops to a set value, the power supply […]
1. The goal of controlling the deviceThe battery is the “heart” of an independent power supply system and must be prevented from being overcharged (overcharging can lead to plate corrosion, gassing and moisture loss) and discharging below the cut-off voltage, which can lead to permanent damage to the battery and capacity loss. Damage from overcharging […]
1. CorrosionSulfuric acid will gradually corrode the lead plates, especially the positive plates. Excessive gassing, high operating temperatures (where acid chemistry is more active), and deep discharges can accelerate corrosion, allowing the acid to penetrate deeply into the plates. 2. overloadCurrents greater than those recommended by the manufacturer can cause heat generation, which accelerates corrosion, […]
1. Battery characteristicsFor independent power supply systems, the following points must be considered when selecting batteries:(1) How much energy needs to be stored in the battery.(2) Charge rate and discharge rate.(3) To what extent can the battery be discharged.(4) What is the voltage required by the battery.(5) How to judge whether the battery is overcharged […]
①Lithium-ion batteryLi-ion batteries are similar to lead-acid batteries in that there are positive and negative electrodes in the electrolyte, and lithium ions move from negative to positive during discharge and vice versa during charging. The negative electrode of a conventional lithium-ion battery is composed of carbon, the most common material being graphite. The positive electrode […]