JPH0295137A - Non-utility power source system - Google Patents

Abstract

PURPOSE:To effectively utilize the generating capacity of a non-utility generator during power supply together with a commercial power by calculating a marginal amount according to generating amount and power amount, and switching a power supply switching system to optimize the generating amount. CONSTITUTION:Power supply state information of a power supply switching system 8 for supplying power to load units 61-6n at a certain time is read to power supply state information input means 12 through a communication controller 10. Power amount or commercial power receiving amount being supplied to the units 61-6n and the generating amounts of generators 41-4m during normal operating are read in power amount input means 16 and generating amount input means 14 through the controller 10. Marginal amount is calculated from the using power amount and the generating amount by calculating means 18, the switching to optimize the generating amount is conducted by switching the system 8 by switching control means 20 according to the marginal amount and the power supply state information. Thus, the operation of the normal generator can be optimized.

Description

[Detailed Description of the Invention] [Summary] Regarding a self-power supply system that can optimally supply self-generated power using surplus capacity and power supply status information, the present invention relates to a self-power supply system that can optimally supply self-generated power using surplus capacity and power supply status information, and the present invention relates to a self-power supply system that can optimally supply self-generated power using surplus capacity and power supply status information, and to improve the operation of a regular power generation device in a combined power supply using commercial power and private power generation. A private load that supplies power to multiple load devices from a commercial power receiving device and a plurality of private power generation devices, at least one of which is in regular operation, via a power supply switching system for the purpose of optimization. In the power supply device to the equipment, a communication control device, a power supply status information input means for reading power supply status information in the power supply switching system via the communication control device, and communication control of the power generation amount of the private power generation device in operation. A power generation amount input means for reading in the power generation amount through the device, a power amount input means for reading the power amount for power supply to the load equipment through the communication control device, and a calculation for calculating the margin amount in response to the power generation amount and the power amount. and a switching control means for causing switching of the power supply switching system, so that the switching control means responds to the surplus amount and power supply status information to cause the power supply switching system to switch to optimize the amount of power generation. It was configured as follows.

[Industrial application field]

The present invention relates to a private power supply system that can optimally supply power from a normally operating power generator when power is supplied in combination with commercial power and private power generation.

The electricity consumed by electrical equipment is usually commercial electricity.
Some electricity consumers have a private power generation facility and configure a private power supply system so that consumed power can be supplied from both the commercial power supply source and the private power generation facility. The main reason for establishing this private power supply system is that it was previously necessary to install it only as an emergency facility when the reliability of power supply to private loads could not be ensured with only power supplied from the power supplier. However, if the conventional self-supply power system remained the same,
Private power generation equipment only operates in emergencies and is idle equipment at all times, so it is energy saving and
There is a need to use it more effectively from the perspective of cost savings.

[Conventional technology]

BACKGROUND ART Conventionally, an electric power consumer has installed a private generator, and in an emergency, the electric power supplied from the private generator is supplied to the load in place of commercial power. This power supply switching is performed by disconnecting the load equipment from the commercial power supply system using a circuit breaker, etc. on the commercial power supply system to the load, and then switching the power supply system between the load equipment and the private generator to another power supply system. This is done by forming a circuit breaker or the like.

[Problem to be solved by the invention]

It is also possible to operate the private power supply system as described above as a combined power supply system with a private power generator in regular operation, to make use of the economic efficiency of the private power generator and to increase the cost-saving effect.

However, in order to increase the cost-saving effect, it is necessary to measure the total amount of electricity used in the home, understand the usage status of each feeder, and operate and switch each home generator so that the amount of power generated is determined accordingly. It is necessary to do the following. It is not easy to do this manually, it takes time, and there is a significant lack of responsiveness. This means that even if you try to reap the fruits, there will be times when you will not be able to do so due to the poor methods used.

The present invention was created in view of such problems, and an object of the present invention is to provide a self-power supply system that can optimize the operation of a regular power generator in a combined power supply using commercial power and private power generation.

[Means to solve the problem]

FIG. 1 shows a block diagram of the principle of the present invention. As shown in this figure, the present invention provides a commercial power receiving device 2 and a plurality of private power generating devices 41 (i-
1, 2, ..., m) to multiple load devices 6j (j
=1.2, .

The above named components include a communication control device 10, a power supply state information input means 12 that reads power supply state information in the power supply switching system 8 via the communication control device 10, and a private power generation unit that is in operation. a power generation amount input means 14 for reading the power generation amount of the device via the communication control device 10; a power amount input means 16 for reading the power amount for feeding the load device 6j via the communication control device 10; It consists of a calculation means I8 that calculates a margin in response to the amount of power generation and the amount of power, and a switching control means 20 that causes the switching of the power supply switching system 8, and performs switching to optimize the amount of power generation according to the amount of margin and Switching control means 20 that responds according to power supply status information
According to the present invention, this is caused to occur in the power supply switching system 8.

[For production]

Power supply state information at the time when the power supply switching system 8 that supplies power to the load equipment is read into the power supply state information input means 12 via the communication control device 10 . Further, the amount of electric power being supplied to the load equipment or the amount of commercially received electric power and the amount of power generated by the power generation device in regular operation are inputted via the communication control device 10 to the amount of power input means 16 and the amount of power input means 14, respectively.
is loaded into. The calculation means 18 calculates the surplus amount from the amount of power used and the amount of power generation, and the switching control means 20, which responds to the surplus amount and the power supply status information, causes the power supply switching system 8 to switch to optimize the amount of power generation.

〔Example〕

FIG. 2 shows a system configuration diagram of an embodiment of the present invention, and FIG. 3 shows a processing flow for implementing the present invention.

In FIG. 2, 20 is a CPU, -22 is a memory, and 24
is a file device, 26 is a CRT display device, 28
1 is a printer, 10 is a communication control device, and these are connected to a bus 32.
connected via. The memory 22 stores a program for executing the process shown in the process flow shown in FIG. 3, and the program is executed by the CPU 20. 3
4 is a private power supply system connected to the communication control device 30.

FIG. 4 shows an example of the configuration of the private power supply system 34 shown in FIG.

In Figure 4, Gl and Gz are private generators, and F.

to F6. FGI to Fc4 are feeders, A + 1
, A 12;' B 1. I+B 12 is the bus bar,
Sl+ to S6□ are switching circuit breakers, K+ to Kb, Ka+
and K G2 are power consumption measuring instruments, Fo through FK6 are load devices, bus line A11 is between feeders F, , F, and feeder F3, and bus line A1□ is between feeders F2. The bus line B1 between F5 and feeder F4 is feeder F3. FG3
The bus line B1□ between and feeder F6 is feeder F, .
It is a bus line between F, , and feeder F6.

Each feeder in FIG. 4 (feeder 1 to feeder n in FIG. 5) and switching circuit breakers (indicated by circuit breakers C71 to C-m and circuit breakers G1 to G=m in FIG. 5, where C is a commercial The on/off state of the electric power (G represents a circuit breaker for power from the private generator), the operating status and power generation amount of the private generator, and the measured values from each electric energy measuring device are shown in the fifth table.
As shown in the figure, the data is taken into the CPU 20 via the communication control device 10.

In FIGS. 2 to 4, feeders F to F6. F
, , to Fc4, switching circuit breakers Sl+ to SI6, and bus lines A I l l A I 2, B1+, and B+□ correspond to the power supply switching system 8 in FIG. The programs in memory 22 for CPU 20, filter device 24, bus 32 and steps 100, 102, 108 and 110 of FIG.
This corresponds to the power supply status input means 12 shown in the figure.

The programs in the memory 22 for the CPU 20, file device 24, lotus 32, and step 104 in FIG.
This corresponds to the power generation amount input means 14 in the figure.

The programs in memory 22 for CPU 20, file device 24, bus 32 and step 106 in FIG.
This corresponds to the power amount input means 16 in the figure.

The programs in the memory 22 for the CPU 20, the lotus 32, the file device 24, and step 112 in FIG.
This corresponds to calculation means 18 in the figure. CPU20, Has32,
The file device 24, the CRT display device 26, and the programs in the memory 22 for step 114 in FIG. 3 correspond to the switching control means 20 in FIG.

A description will now be given of how the regularly operated generator of the private power supply system shown in FIG. 4 can be used in an optimal state.

When the private power supply equipment enters the operating state, the following processes are periodically performed in its CPU 20.

Through the communication control device 10, each feeder Fl to F
6. The on/off states of Ffil to FG4 are imported and filed in the file device 24 (100 in FIG. 3), and the bus line A1. The power supply status of B12 to B12 is determined (102 in FIG. 3, FIG. 6). In addition, via the communication control device f10, the amount of power generated by the private generator that is being operated is measured by the amount of electricity a.
Read from K c + or Kcm (104 in Figure 3)
Read the amount of power used by each load device F□ to FK6 that is being supplied with power (106 in Figure 3).
), reads the on/off status of each switching circuit breaker S11 to S+6 and files it in the file device 24.
08), the state of power supply to the load equipment that is being supplied with power at that time is determined (110 in FIG. 3, FIG. 7).

Calculate the margin X based on the following formula from the power generation amount (third
112) in the figure.

χ-KGゎ-a×Load total power usage However, KGゎ is the amount of power generated by the private generator during regular operation, and a is a value smaller than 1, which is used for private power supply equipment that can increase the usage efficiency of the regular operation generator. This value is determined by existing factors.

By comparing the amount of surplus and the total amount of power used by the loads currently being supplied with power, switch which circuit breaker for the load equipment that is currently being supplied with power and switch from commercial power to self-generated power or self-generated power. If the electric power is converted to commercial electric power, it is necessary to judge whether or not the efficiency of the private generator in operation can be increased (114 in Fig. 3), and if the judgment is positive, the switching target switching circuit breaker is Perform switching (116 in Figure 3)
). Note that in the case of a negative determination, the above-mentioned switching is not performed.

The switching is performed as follows. For example, the 8th
As shown in the figure, when the above-mentioned affirmative determination is made, a switchable indication * for the circuit breaker subject to the affirmative determination is displayed in the corresponding display area 200 on the screen of the CRT display device. When the operator visually recognizes the display and touches the operator switching bench touch area 202, the control signal is given to the corresponding circuit breaker via the communication control device 10, causing the switching (note that the control system itself is belongs to). Further, C in FIG. 8 represents commercial power, G represents private power, and hunting indicates that the power is currently being supplied.

When the above-mentioned switching is performed, the control contents are displayed on the screen of the CRT display device as described above, and the above-mentioned switching is performed under visual confirmation by the maintenance personnel, and the control contents are also transmitted from the printer 28. Print out the message and keep it as a control record.

Further, the above-mentioned power supply status, various measured values, etc. are displayed on the screen of the CRT display device 26 in response to requests from maintenance personnel.

Furthermore, the switching priority order for each switching circuit breaker can be specified using the CRT.
It can be changed via the screen of the display device 26. Thereby, the state of power supply to the load equipment can be controlled temporally or according to the equipment operation mode.

〔Effect of the invention〕

As described above, according to the present invention, the generation capacity of a private power generation device that is being supplied in combination with commercial power can be effectively utilized, and the cost burden can be reduced, especially in business facilities that consume a large amount of commercial power. The reduction effect will be greater.

[Brief explanation of drawings]

Figure 1 is a principle block diagram of the present invention, Figure 2 is a system configuration diagram of an embodiment of the present invention, Figure 3 is a diagram showing the processing flow of the present invention, and Figure 4 is a configuration example of a private power supply system. Figure 5 is a diagram showing the input system for operation information of private power supply equipment, Figure 6 is a diagram showing an example of power supply status for busbars, and Figure 7 is a diagram showing an example of power supply status for the bus bar.
The figure shows an example of the state of power supply to each load device, and FIG. 8 is a diagram showing an example of a screen display for switching the switching circuit breaker. In Figures 1 to 4, 2 is a commercial power receiving device, 4,..., 4□ are private power generators (private generator C+,
CZ), 6j, ..., 6□ are load devices, 8 is a power supply switching system (feeders F1 to F6, F'c+ to Fc6, switching circuit breakers Sl+ to S16, buses Az, A+
□. Bz, B1□), 10 is a communication control device, 12 is a power supply status information input means (CPU 20, file device 24, lotus 32, and steps 100 and 1 in FIG. 3).
02, 108, 110 program in the memory 22), 14 is a power generation amount input means (CPU 20, file device 24
, lotus 32 and the program in the memory 22 for step 104 in FIG.
, bus 32 and memory 2 for step 706 of FIG.
2 program), 18 is a calculation means (CPU 20, lotus 32, file device 24 and program of memory 22 for step 112 in FIG. 3), 20 is a switching control means (CPU 20, lotus 32, file device 24, CRT). 3. Programming of display device 26 and memory 22 for step 114 of FIG. Non-inventive processing flow chart

Claims (1)

[Claims] (1) A commercial power receiving device (2) and a plurality of private power generating devices (4_i) (i=1, at least one of which is in regular operation)
2,..., m) to multiple load devices (6_j) (j=
1, 2, . power supply status information input means (12) for reading power supply status information in the system (8) via the communication control device (10); 10) Power generation amount input means (14) read through
and a power amount input means (1) that reads the power amount for feeding the load device (6_j) via the communication control device (10).
6), a calculation means (18) for calculating a margin in response to the power generation amount and the electric power amount, and a switching control means (20) for causing switching of the power supply switching system (8), A self-power supply system characterized in that a switching control means (20) that responds to the surplus amount and power supply state information causes the power supply switching system (8) to perform switching to optimize the amount of power.