Power generation control system, power generation control method, program, and medium

Abstract

It has been difficult to reduce a waste of energy in a fuel cell power generating process when, for example, a temporary rise or drop of a power load occurs. A fuel cell power generation system includes: load detection means of detecting power requested by a load; and output control means of accumulating a time at which a detected power requested by the load is equal to or larger than a predetermined value when a fuel cell body does not generate power to be supplied to the load, and allowing the fuel cell body to start generating power to be supplied to the load according to a predetermined rule based on an accumulation result.

Description

TECHNICAL FIELD [0001] The present invention relates to a power generation control system, a power generation control method, a program and a medium for supply of power to, for example, a domestic power load using a fuel cell, etc. BACKGROUND ART [0002] (A) FIG. 11 shows a configuration of a conventional fuel cell power generation device (conventional technology 1) disclosed in Japanese Patent Laid-Open No. 7-57753. In FIG. 11, a fuel cell body 31 generates DC power by reaction between hydrogen supplied by hydrogen supply means 32 and oxygen in the air supplied by air supply means 33, and a power converter 34 outputs AC power after converting the DC power into the AC power. At an external load command, a power control unit 35 controls a flow rate control unit 36 and the power converter 34, the flow rate control unit 36 controls the flow rate of the hydrogen supply by the hydrogen supply means 32 and the flow rate of the air supply by the air supply means 33 such that the flow rates ...

AI Technical Summary

Benefits of technology

[0020] The present invention has been achieved to solve the abovementioned problems with the conventional technology, and aims at providing a power generation control system, a power generation control method, a program, and a medium for preventing the reduction of the durability by, for example, stabilizing the operation of the fuel cell power generation device and improving the efficiency.

[0021] The present invention has also been achieved to solve the problem with the conventional technology, and aims at providing a power generation control system, a power generation control method, a program, and a medium capable of minimizing the waste of energy even when there arise a temporary rise or drop of power load.

Problems solved by technology

Therefore, a large capacity charge / discharge device 46 is required, and the entire device is costly and needs a large installation space.

Since an intermittent operation is performed in the above mentioned conventional fuel cell power generation system (conventional technology 3), energy is wasted each time power-up and power-down operations are performed.

(A) However, in the conventional fuel cell power generation device (conventional technology 1), when an external load command largely changes within a short time, the power control unit 35 has to control the output power by raising and dropping it within a short time, thereby possibly causing the hunting of output power because of the delay of control.

As a result, there can arise the problem that the operation of the fuel cell power generation device becomes unstable, the efficiency of the device is lowered, and the durability is shortened.

(B) Additionally, there has been the problem that the fuel cell power generation system (conventional technology 4) wastes energy when the operation as shown in FIG. 16 which is a graph for explanation of an example of another operation pattern of the conventional fuel cell power generation system (conventional technology 4) is performed.

Thus, energy is wasted in the originally unnecessary activating and stopping operations.

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