Power source apparatus, power source system, electric power apparatus and electric power system

Abstract

It can maintain the balance of supply and demand in the power supply system, and can also suppress the fluctuation range in the power supply system to maintain a balanced state in response to natural energy fluctuations and sudden load changes. A power supply device (8), which supplies power to a power system (9), comprising: a power generation device (1) with output fluctuations that uses natural energy such as wind power and sunlight to generate power; and a power generation device (1) that is arranged in parallel , Power generation equipment (2) that operates as a basic power source for power supply of diesel engines, gas engines, hydraulic power, etc., the power generation equipment (2) is composed of an excitation power source with variable frequency, that is, a dual power supply synchronization mechanism of a variable frequency converter (5) to make. Thus, the excitation control using the inertial energy of the prime mover (3) and the generator (4) can be used for short-period fluctuations. On the other hand, the relatively slow fluctuations can be controlled by the prime mover. The power generation facility (2) absorbs or supplements electric power, and equalizes the electric power supplied to the electric power system (9).

Description

(1) Technical field [0001] The present invention relates to a power supply device, a power supply system, a power supply device system, and an electric power system, and particularly to a power supply device, a power supply system, a power supply system, and an electric power system having a power generation device accompanied by output fluctuations. (2) Background technology [0002] When generating electricity using natural energy such as sunlight and wind power, the output of natural energy may fluctuate due to weather conditions and the like. Therefore, there is a problem that the power fluctuation at the system connection point exceeds the system connection condition due to the fluctuating electric power. In addition, when the scale of the natural energy power source increases and fluctuating power increases, the problem of frequency fluctuations in the entire system also arises. Therefore, smoothing of fluctuating electric power is desired. [0003] Conventional powe...

AI Technical Summary

Problems solved by technology

However, with these configurations, although high-efficiency operation and short-term power fluctuation smoothing can be achieved as a single wind power generation equipment, there are problems that cannot supply and maintain self-owned power generation power systems combined with other multiple power generation equipment and load equipment, and isolated islands. The power corresponding to the load required by the independent power supply system, etc., or the problem that the power balance of the entire power system cannot be realized

[0006] In addition, when a variable speed generator with an energy storage wheel is used, the driving power is often lost, and there is a problem of poor economy.

[0007] In addition, when a system having a plurality of power generating facilities is adopted, fluctuations among power sources may be supplemented to alleviate overall fluctuations (generally, when the number of wind power generating facilities is n, the power fluctuation is But there is also the problem that setting smoothing devices on each power generation equipment will cause excessive equipment

[0008] In addition to the method described in Patent Document 1, a method using power storage devices such as batteries and capacitors can also be used, but these methods have problems such as high equipment cost, short life, high maintenance costs for performance maintenance, and difficulty in securing installation space.

Images