JP2005333773A - Generator operation control method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a generator operation control method which can reduce errors in a constant operation of receiving electric power, and allows generators to be operated as much as possible in an effective region. <P>SOLUTION: In the generator operation control method for a power generation system for systematically linking a power receiving system to a plurality of power generators, only one scheduled stop generator performs a constant control of receiving electric power, and the other remaining power generators in operation performs a constant operation at a rated output, allowing the number of insensitive bodies as a whole to be confined to one power generator to effectively operate the power generators. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a generator operation control method in a power generation system including a plurality of generators connected to a power receiving system.

  For example, as disclosed in Patent Document 1, the generator connected to the power receiving system starts operation when the load increases so as not to exceed the contract power, and performs parallel operation with a plurality of generators. It has been a common generator operation control method to control the generator that is operating occasionally to share the load so that the output of each generator is equal while controlling the received power to be constant. In this case, each generator has a control dead zone of several percent with respect to the target output, and the power may be generated slightly less than the actual target output. If all the generators in operation output a small amount, the received power becomes larger than the set value for keeping the received power constant, and the received power increases as the number of generators operating increases. Becomes larger, and the merit of operating the generator decreases.

In addition, how many generators are to be operated is determined by setting, and it is conceivable to operate earlier considering allowances. In this case, if the generator shares the load, any generator may not be able to operate in an efficient region depending on the load.
JP 2000-166100 A

  As described above, in the conventional generator operation control method, as the number of operating generators increases, the amount of received power due to the dead zone becomes larger than the set amount, and the merit of operating the generator is reduced, and the electricity charge is also reduced. It will have a big impact. In addition, when the generator cannot be operated in an efficient area, there is a problem that the running cost increases and the merit of introducing the power generation system cannot be obtained.

  The present invention has been made to cope with the above situation, and its problem is to reduce the error during constant operation of the received power and to perform operation in an efficient region with as many generators as possible. It is an object of the present invention to provide a generator operation control method capable of performing the above.

  In order to solve the above problems, the invention described in claim 1 is a generator operation control method in a power generation system interconnecting a power receiving system and a plurality of generators, wherein only one generator scheduled to be stopped has a constant received power. The control is performed, and the remaining generators are operated so as to perform a constant operation at the rated output so as to suppress the control dead body as a whole to one generator.

  According to the first aspect of the present invention, when the total load (received power + operating generator output total) is smaller than the suppliable power (received power set value + operator rated power total), one generator to be stopped The remaining power generator is operated at a constant rated output and the control dead zone as a whole is limited to one generator so that the generator can be operated efficiently. it can.

  The invention according to claim 2 is the generator operation control method according to claim 1, wherein the received power constant control is performed by the two generators to be stopped and the next generator to be stopped, and the remaining power generation during operation is performed. The machine is characterized by performing constant operation at rated power and avoiding low-load operation of the engine.

  According to the second aspect of the present invention, in order to avoid low-load operation of the engine, when the received power constant control cannot be performed with only one of the generators scheduled to be stopped, the received power is also constant for the next scheduled generator to be stopped. Control is performed, and received power constant control is performed by two generators.

  According to a third aspect of the present invention, in the generator operation control method according to the first aspect, the generator that performs constant operation at the rated output is not operated at the rated output, but is constant at the most efficient generator output. It is characterized by performing driving.

  According to the third aspect of the invention, the generator that performs constant operation at the rated output is not operated at the rated output, but is operated at the generator output that provides the highest efficiency.

  According to the present invention, it is possible to reduce a control dead zone in a time zone in which the received power charge is high during the daytime, and it is possible to reduce the operating cost of the generator by controlling the rated output machine with an efficient output value. In particular, the greater the number of generators that can be operated, the greater the cost advantage.

The best mode for carrying out the present invention will be described below with reference to the drawings.
FIG. 1 is an algorithm flow diagram for performing constant control of received power only by a scheduled stop machine according to the first embodiment of the present invention.

In this figure, in order to operate the function of the high-efficiency operation control algorithm of this embodiment, the total load (received power value + total operating machine output) can be supplied (received power set value + operating machine rated output total). Is smaller than the condition (step 1). As a matter of course, when the total load is large, all the operating machines are operated at a constant output (step 5). When the total load is smaller than the suppliable power and the own machine is not a scheduled stop machine (step 2), the target power is controlled as the rated output (step 4). If the own aircraft is scheduled to stop, the target power is recalculated. The arithmetic expression is
Target power = received power + own machine output power−received power set value (step 3).

FIG. 2 is an algorithm flow diagram for performing constant received power control with two scheduled stop machines according to the second embodiment of the present invention.
In this figure, the basic conditions for operating the function of the high-efficiency operation control algorithm of this embodiment are the same as in the first embodiment of FIG. 1 (steps 1 to 5), but in this embodiment, the scheduled stop machine 1 is further reduced. A condition (step 6) as to whether or not the received power constant control can be performed at the stand is added. In other words, when the received power constant control is performed with one generator, if the output is below the minimum load operation, the target power of the original scheduled stop machine (step 7) is the minimum output (step 8). Then, the next scheduled stop machine (step 9) performs the original operation of receiving power constant, and recalculates the target power. The calculation formula is the same as in the case of the first embodiment of FIG. 1, and the target power = received power + own machine output power-received power set value is obtained (step 10).

FIG. 3 is an algorithm flow diagram when the rated output machine of the third embodiment of the present invention performs control with the most efficient output.
As shown in the figure, the high efficiency control algorithm of this embodiment is different from the algorithm of FIG. 2 in that the most efficient output of each generator is set in advance, and the target power is the rated output. The generator that performs a constant operation is only controlled to perform a constant operation with this set power (step 5), and the other algorithms are the same as the algorithm of FIG. The same step code is attached.

  According to this embodiment, it is possible to operate with the most efficient generator.

The algorithm flow figure which performs receiving power constant control only by the one stop plan machine of 1st Embodiment of this invention. The algorithm flow figure which performs received power constant control with the two scheduled stop machines of 2nd Embodiment of this invention. The algorithm flowchart which the rated output machine of 3rd Embodiment of this invention performs control with the most efficient output.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 1 ... High-efficiency operation control condition, 2 ... Target electric power calculation process in case receiving power constant control is carried out by one stop planned machine, 3 ... Target electric power calculation process in case receiving electric power constant control is carried out by the next scheduled machine to stop, 4 ... Target power of the machine scheduled to stop when 2 units of received power constant control is performed, 5 ... Target power for controlling the rated output machine with the most efficient output, 6 ... 1 unit of received power constant control is possible Judgment whether or not.

Claims (3)

  In a generator operation control method in a power generation system that interconnects a power receiving system and a plurality of generators, only one generator scheduled to be stopped performs constant control of received power, and the remaining operating generators at the rated output A generator operation control method, characterized in that a constant operation is performed so as to suppress the control dead body as a whole to one generator.   2. The generator operation control method according to claim 1, wherein received power constant control is performed by a generator to be stopped and a next generator to be stopped, and the remaining generators are operated at a rated output at a constant output. And a generator operation control method characterized by avoiding low-load operation of the engine. 2. The generator operation control method according to claim 1, wherein the generator that performs constant operation at the rated output is not operated at the rated output, but is operated at the most efficient generator output. Machine operation control method.

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