INTRODUCTION
The comprehensive utilization of wind energy, solar energy scenery complementary independent power system is a reasonable power supply system. Not only for the electricity grid inconvenience to the region, such as border posts, communications relay stations, traffic signals at the inspection station and exploration in rural and pastoral areas to provide low-cost, high reliability of power supply, but also to address the current energy crisis and the environment Pollution opening a new path.
Individual solar or wind energy systems, due to time and geographical constraints, it is difficult to round-the-clock use of solar energy and wind energy resources. And solar and wind energy in terms of time and geographical are strongly complementary to each other, the strong winds during the day light small, weak illumination at night, the wind due to large changes in surface temperature increased, solar and wind energy at the time Complementarity of scenery is complementary generating system at the best use of resources on the match.
l hardware
Scenery complementary independent photovoltaic power generating units from the system, wind power generation unit, intelligent management system core, inverter, storage elements such as composition, as shown in Figure l.
The specific parameters of a system used by the largest electricity load and the average electricity consumption decisions. Choice is the largest electricity load capacity of the inverter system based on the average, while generating capacity is the choice of fan capacity and PV panels and battery capacity basis. At the same time installation location scenery resources situation is also determined photoelectric panels and another based on the fan capacity.
Photovoltaic power generation units and wind power generation units using photovoltaic power generation units required for the scale of PV panels, solar energy conversion and, through intelligent management of the core rechargeable batteries, discharge, inverter for unified management. Wind power generation units using small wind power generators, wind energy conversion, through the intelligent management of the core control the whole system allowed to discharge. Two modules in the collection of energy on each other, but also with their own characteristics: a reliable electricity supply photovoltaic power generation unit, operation and maintenance costs low, but the cost of higher generating capacity of wind power generation unit, operation and maintenance cost and low cost, but reliable Low.
Lead-acid battery storage elements foot scenery complementary independent power system commonly used storage elements, its low cost, large capacity, maintenance-free features make it a complementary scenery of the independent power of choice. Because wind power and photovoltaic modules must be adopted to stabilize the power supply energy storage batteries, battery capacity and a reasonable charge and discharge is a scientific system of life assurance, the system uses three-stage double-charging, the realization of the scientific rechargeable lead-acid batteries. Scenery complementary independent power dual-energy storage systems, including two sets of lead-acid battery, charging and discharging can be made at the same time, through intelligent control of the core can discharge the load, forks in charge of the conditions for the arrival of backup storage battery charge , To switch between the two sets of batteries from its real-time monitoring system voltage state decision.
MOSFET charge-intelligent management module from the core-driven MOSFET charging module, according to the different system, select a different voltage levels of MOSFET, to achieve system to the battery charge and discharge. MOSFET choice of the International Rectifier HEXFET the third generation of products, IR products have switched rapidly, opening low-impedance, higher cost-effective features. Control module based on different voltage MOSFET gate-level design, by the intelligent management of the core control module MOSFET output state.
Inverter system can not only provide a stable DC power, driven DC load, but also through the provision of single-phase AC power inverter Lu.
Smart management of the core from the least common multiple LCD modules, keyboard, MCU components, the system control, management of the core, driven MOSFET rechargeable battery module to achieve the double standard three-stage charging, driven JCBT of DC / AC power inverter, And the system of real-time data protection and reproduction and transmission, while providing the fan speed magnetic protection, in the wind power, to reverse fan reluctance torque and lower fan speed. MCU core system chosen TI's MSP430 microcontroller, its wealth of on-chip resources make the system control and management are extremely convenient.
2 principle and system software
2.1 pair of standard three-stage charging principle and achieve
Lead-acid battery system is the storage elements, was the impact of scenery complementary system the key factor in life, lead-acid battery charging and discharging a direct impact on the control of battery life and unreasonable charging and discharging battery will directly lead to the collapse. Zhu intelligent management system core system battery charge and discharge process. This system uses three-stage double charge to optimize the charging process.。 Double-charging three-stage process in line with the characteristics of lead-acid batteries, the batteries can be a good safeguard. Three-stage charging process shown in Figure 2.
