A high-efficiency photovoltaic charging control method applied to an independent photovoltaic power generation system

A charging control method and power generation system technology, applied in the direction of energy-saving charging equipment, battery circuit devices, collectors, etc., can solve the problems of low charging efficiency and short service life of batteries, so as to prolong service life, alleviate shocks, and prevent The effect of overcharging or overdischarging

CN102290840AInactive Publication Date: 2011-12-21BEIHANG UNIV
3 Cites 16 Cited by

Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
Publication Date
2011-12-21
Estimated Expiration
Not applicable · inactive patent

Smart Images

  • Figure 1
    Figure 1
  • Figure 2
    Figure 2
  • Figure 3
    Figure 3
Patent Text Reader

Abstract

The invention discloses an efficient photovoltaic charge control method for an independent photovoltaic generating system, comprising the three stages of MPPT (maximum power point tracking) charge, constant-voltage charge and floating charge: stage one: using an MPPT method to quickly charge a storage battery, carrying out once power judgment every other continuous five disturbances, and realizing the exact power tracking under the condition of quick changes of environment conditions; stage two: using lifting charge and equalizing charge to supplement the electric energy of the storage battery in the normal and overcharging states respectively; and stage three: maintaining the full electric energy of the storage battery. In the method, the charge states are managed effectively, the chargeefficiency is improved, and the service life of the storage battery is prolonged.
Need to check novelty before this filing date? Find Prior Art

Description

technical field

[0001] The invention belongs to the field of photovoltaic power generation, and in particular relates to a high-efficiency photovoltaic charging control method applied to an independent photovoltaic power generation system. Background technique

[0002] As a new type of energy, solar energy has been widely used due to its advantages of abundant resources, clean environment, and limited geographical restrictions, among which photovoltaic power generation is particularly prominent. However, the problems of short service life and low charging efficiency of batteries in independent photovoltaic power generation systems are relatively prominent.

[0003] The charging control method is the core of the charging controller, and its quality directly affects the life of the battery in the independent photovoltaic power generation system and the working efficiency of the system. Commonly used charging methods in independent photovoltaic power generation systems include...

Examples

Embodiment

[0060] image 3 It is a schematic diagram of a high-efficiency photovoltaic charging control method applied to a 12V battery, specifically:

[0061] Phase 1 is image 3 In the oblique line section of MPPT, the system first determines the set value of the full voltage according to the state of the battery, and then changes the duty cycle of the charging pulse through the maximum power point tracking algorithm to maximize the output power of the photovoltaic battery, and quickly charges the battery until the battery voltage rises To the set value of full voltage, the charge coefficient of the battery is 100%.

[0062] The full voltage setting standard of the battery is: if the battery has been discharged once, that is, the battery voltage has been lower than the low-voltage disconnect voltage (11.1V), the full voltage is set to the balanced voltage (14.5V); Put it on, and set the full voltage to the boost voltage (14.3V).

[0063] Phase 2 is image 3 In the line section of m...