JP3609346B2 - Operation method of distributed power supply - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a method for operating a distributed power source using equipment such as a gas turbine, a micro gas turbine, a gas engine, and a diesel engine.
[0002]
[Prior art]
In recent years, development of a distributed power generation system such as a micro gas turbine has been promoted, and it is expected that the distributed power generation system will be widely used in homes, factories, and regions in the future.
For example, Japanese Patent Laid-Open No. 2000-303854 discloses an inlet in which turbine means generates a jet flow of power gas in a tangential direction as a high-efficiency gas turbine that enables ultra-compact cogeneration that can be used from home use to business use. And an outlet for discharging the expansion gas, a stator having a deflector disposed between the inlet and the outlet, and a turbine rotor rotatably disposed inside the stator, the turbine rotor being disposed between the inlet and the outlet. A configuration including an annular groove that allows the jet stream to pass in the circumferential direction and a turbine blade that is arranged adjacent to the annular groove is disclosed, and a deflector is housed in the annular groove to deflect the jet stream to the turbine blade. By doing so, the output efficiency per unit flow rate is improved. The first exhaust heat recovery heat exchanger recovers exhaust heat energy of the turbine to preheat the compressed air, and the second exhaust heat recovery heat exchanger supplies hot water with the exhaust gas thermal energy, By accommodating the second exhaust heat recovery heat exchanger in the turbine housing, the size, weight, and cost are reduced.
[0003]
Japanese Patent Application Laid-Open No. 2000-166100 discloses a reduction in received power based on the capacity of an operating generator as a control device for a private power generator that is operated in conjunction with a commercial power system while supplying power to a premises load. A configuration is disclosed in which the received power reduction value is subtracted from the received power reference value to output a received power target value, and the generated power command value is adjusted by this signal. Even when the received power is reduced by the above, the power is controlled at a high speed by changing the rotational speed command to the governor at a high speed, and the received power is quickly recovered to the set value.
[0004]
[Problems to be solved by the invention]
Currently, the following issues can be cited as problems facing distributed power generation systems such as micro gas turbines.
(1) The customer must purchase grid power at the time of maintenance or failure of the distributed power source.
(2) The operating rate of distributed power sources is low.
(3) The power generation efficiency of distributed power sources, particularly the power generation efficiency at partial loads, is low.
(4) Linking a distributed power supply to the grid may cause a reduction in grid power quality.
[0005]
In addition, a distributed cogeneration power generation apparatus using a high-efficiency gas turbine described in Japanese Patent Laid-Open No. 2000-303854 described above, and a private house operated in conjunction with a commercial power system described in Japanese Patent Laid-Open No. 2000-166100 The above-described problems have not been solved for power generation devices and the like.
[0006]
The present invention has been made in view of the above points. An object of the present invention is to link customers with distributed power sources under a switch so that the distributed power sources can be remotely monitored and operated. The power supply directives for all of the power stations can be used to maintain the distributed power supply, solve problems during failure, improve the power generation efficiency of the distributed power supply, and promote the spread of the distributed power generation system. It is to provide a method for operating a distributed power source.
[0007]
[Means for Solving the Problems]
In order to achieve the above object, the distributed power supply operating method of the present invention links customers who have distributed power supplies under a switch, and remotely monitors each distributed power supply by a centralized monitoring control system. It is configured so that it can be operated remotely, a power supply command for the distributed power supply is collectively performed, and the distributed power supply is mutually interchanged between consumers.
[0008]
In addition, the method of the present invention links customers having a distributed power source of at least one of a gas turbine, a micro gas turbine, a gas engine, and a diesel engine under a switch, and centrally monitors and controls each distributed power source. By enabling remote monitoring and remote operation by the system and issuing power supply commands for the distributed power supply collectively, the distributed power supply can be used when the operation rate of the distributed power supply is low or the power generation efficiency is low due to partial load. It is characterized by being able to provide power to all consumers with a distributed power source that is less in number than the number of consumers, with mutual flexibility among customers.
[0009]
In addition, the method of the present invention links customers having a distributed power source of at least one of a gas turbine, a micro gas turbine, a gas engine, and a diesel engine under a switch, and centrally monitors and controls each distributed power source. By enabling remote monitoring and remote operation by the system and performing a power supply command for the distributed power supply in a lump, by adding a load command for backup to other distributed power supplies at the time of maintenance or failure of the distributed power supply It is characterized by increasing the power generation load and performing backup at the time of maintenance or failure.
[0010]
In the method of the present invention described above, the backup power supply is started up within the time set as the penalty period of contract power over from the equipment failure detected by the remote monitoring system at the time of backup at the time of equipment trouble of the distributed power supply, It is preferable to construct a mechanism for supplying to customers by consignment.
[0011]
In the above-described method of the present invention, a backup load command special contract is set as an option in a distributed power supply equipment contract, and a benefit such as a maintenance maintenance fee discount is given to a customer who has contracted as a backup power supply. In addition, the payback equivalent to fuel cost plus alpha can be given at the time of backup.
[0012]
In these methods of the present invention, as the distributed power source, for example, a gas turbine, a micro gas turbine, a gas engine, a diesel engine, or the like can be used.
[0013]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described, but the present invention is not limited to the following embodiments, and can be implemented with appropriate modifications. FIG. 1 shows an apparatus for implementing a distributed power supply operation method according to a first embodiment of the present invention. As shown in FIG. 1, for example, a consumer 12 having a distributed power source 10 such as a micro gas turbine is linked under a switch 14 and is not shown, but each distributed power source 10 is concentrated. It is connected to the monitoring control center via a communication line so that it can be remotely monitored and operated. A battery 22 is provided under the switch 14. The consumer 16 is a consumer who does not have a distributed power source and purchases grid power (power plant 18 and substation 20).
[0014]
The power supply command of the distributed power source 10 is collectively executed from a centralized monitoring control center (not shown), and as a result, the distributed power sources are interchanged. In some cases, a single distributed power source may be shared by a plurality of consumers. For example, when 35 kW × 2 is set to 70 kW × 1, there is a merit that power generation efficiency is improved.
In addition, when the distributed power supply 10 is linked to the system, there is a risk of system power quality degradation, but by linking the customers 12 possessing the distributed power supply 10 under the switch 14 and allowing the distributed power supply to be interchanged, It is possible to cope with the maintenance of the distributed power supply, the time of failure, and the like.
[0015]
A specific example of the backup power supply providing system will be described below.
Currently, the key to ensuring the economics of a distributed power generation system such as a micro gas turbine is the power supply contract (contract power). This is because the effect of reducing the basic charge in the power supply contract is the largest.
However, when a backup is requested from an electric power company in the event of a device trouble, the backup fee is high, which is a major impediment to the spread of distributed energy systems.
Therefore, in order to solve such problems, the backup power supply is started up within 30 minutes, which is the penalty period for the contract power over of the normal power company, from the equipment failure detected by the remote monitoring system, and the customer is sent by consignment. A system to supply the system is constructed and can be selected as a maintenance contract option.
[0016]
As the number of equipment contracts increases, the remote load commander option pack is set as an option contract. This is because a backup power supply is not prepared by a device manufacturer or a maintenance contractor such as the present applicant. For example, a load command for backup is applied to a load of a customer who is not operating at 100% load at that time. In addition, if the demand for 1% load increase is commanded to 100 customers and the power generation load at each location is increased by 1%, backup is possible.
Each generator, centralized monitoring and control center, and electric power company are connected by a communication line to realize this function while exchanging various data.
Users who have signed a backup load command special contract are given benefits such as discounts on maintenance and maintenance fees, and at the time of backup, a payback equivalent to fuel cost plus alpha is given.
The conventional remote monitoring system was mainly passive response such as failure response, but this system can actively respond to the customer in the event of equipment failure, and it is also a great power for system sales Can be demonstrated.
[0017]
【The invention's effect】
Since this invention is comprised as mentioned above, there exist the following effects.
(1) By accommodating distributed power sources, it becomes possible to cope with maintenance and failure of distributed power sources without linking to system power.
(2) Power generation efficiency can be improved by interchanging distributed power sources.
(3) The system power quality will not be degraded.
(4) The spread of distributed power generation systems can be promoted.
[Brief description of the drawings]
FIG. 1 is a schematic configuration explanatory diagram showing an apparatus for implementing a distributed power supply operating method according to a first embodiment of the present invention;
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 10 Distributed power supply 12, 16 Consumer 14 Switch 18 Power station 20 Substation 22 Battery

Claims (2)

Users who have distributed power sources of at least one of gas turbine, micro gas turbine, gas engine, and diesel engine can be linked under the switch, and each distributed power source can be remotely monitored and remotely controlled by a centralized monitoring control system As a result, the distributed power supply command can be used without any linkage to the grid power when the operation rate of the distributed power supply is low or when the power generation efficiency is low due to partial load. A method for operating a distributed power supply, characterized in that the power of all the customers is covered by a smaller number of distributed power supplies than the number of consumers, which are mutually flexible among consumers. Users who have distributed power sources of at least one of gas turbine, micro gas turbine, gas engine, and diesel engine can be linked under the switch, and each distributed power source can be remotely monitored and remotely controlled by a centralized monitoring control system In this way, by supplying the power supply command for the distributed power supply in a lump, it is possible to add a backup load command to other distributed power supplies without linking to the grid power during maintenance or failure of the distributed power supply. A method of operating a distributed power source, characterized by increasing a power generation load and performing backup at the time of maintenance or failure.

Images