JP3159683U - Hybrid power supply - Google Patents

Abstract

The present invention provides a hybrid power supply device that enables labor saving of equipment itself. When switching a thyristor switch connected in parallel to a distribution side output of a switch for switching a power source between a commercial side and a distributed side from a commercial power source to a distributed power source in a control device, first energize until the distributed power source is operated. And a controller having a function of energizing the thyristor switch until switching of the changeover switch is completed when switching from the distributed power supply to the commercial power supply. In addition, a thyristor switch is connected in parallel to the commercial output and a voltage measuring device with an instantaneous voltage drop detection function is provided. I have a control device. [Selection] Figure 3

Description

1. Even if this power supply is commercial, it uses natural energy (wind power, boiler power generation, etc.) and regenerative energy generated in-house without waste to save energy and save electricity bills.
2. The generated electric power is stored to the maximum, and surplus electric power is set to zero to effectively supply it to the load.
3. The present invention relates to a device that suppresses an instantaneous voltage drop during power supply switching and is also provided for an instantaneous voltage drop during commercial power supply.

1. The hybrid power source detects the power generation state of a plurality of commercial power sources (1) and distributed power sources (2) that need to be shifted between power generation and use, such as natural energy and regenerative energy, by means of a detection device (10). Power is stored in the power storage device (4) (recently, a battery and an electric double layer capacitor) through (5). When necessary, the inverter (6) is operated to supply power to the load (7).
2. The instantaneous voltage drop countermeasure device is a commercial power supply (1) (see also "similar circuit, Fig. 1"). The detector (10) detects an instantaneous voltage drop due to a lightning strike, etc., and turns it into a power storage device (4). The stored energy is backed up to the main circuit via the inverter (6) so that supply failure does not occur. Power storage device (4) is an existing device that normally stores power to operate inverter (6) through converter (5).

1. Electricity generated by wind power and solar power is wasted because it cannot be stored more than the amount of power stored in the power storage device on a summer windy day. Of course, some devices supply this surplus power to the commercial power supply for sale, so if an instantaneous voltage drop occurs in the commercial power supply, the power supply quality is maintained by compensating for the drop. In fact, the instantaneous voltage drop occurs only several times a year, and the rest is in a standby state. Therefore, the cost-effectiveness of system installation is poor and power loss during standby occurs.
2. In the conventional hybrid power source for natural energy generation, surplus power is wasted. When one side is a commercial power source, an instantaneous voltage drop occurs when switching to power storage device side power supply. In the case of a general load, there is not much problem, but in the case of an important load such as a semiconductor device, it becomes a problem. Instantaneous voltage drop countermeasures are expensive, have little effect on investment costs, and are not installed very often.
3. Normally, it is operated with a commercial power supply. However, it does not throw away any natural energy or regenerative energy generated in the house. This means that the commercial power supply is temporarily unnecessary and energy is saved. In addition, it is provided for an instantaneous voltage drop when supplying commercial power. When the battery discharge from the electricity storage device drops, switching to commercial power until the charging is completed again is the main feature of this device.

In the devised circuit 1, a thyristor switch A (12) connecting the load (7) and the transformer (11) is provided in parallel to the changeover switch (9), and the control device (8) is connected with the commercial power supply (1) to the distributed power supply (8). When switching to 2 ▼, first the control function to operate the distributed power supply (2), and conversely, when switching from the distributed power supply (2) to the commercial power supply (1), the thyristor until the changeover of the changeover switch (9) is completed. An additional control function for energizing the switch A <12> is provided. (Figure 2, Device 1)
The devised circuit 2 is further provided with a thyristor switch B 13 connecting the commercial power source 1 and the load 7 in parallel with the changeover switch 9 and has an additional function for detecting an instantaneous voltage drop. A control device {circle over (8)} having an additional function of immediately operating the thyristor switch B {13} is provided by a signal from the voltage drop detection device {14}. (Fig. 3, Device circuit 2)

  The power supply device of the present invention increases the efficiency of the power in the process of consuming the power obtained from natural energy and regenerative energy, eliminates power loss during standby, consumes only the necessary amount, and the rest goes to stockpile, In particular, when a large investment is made and facilities for effective use of regenerative energy are not possible, a large amount of electricity is stored only by the power storage facility. This device has great advantages in terms of energy saving and environmental promotion throughout the entire system.

Common structure between conventional technology and the present invention Similar circuit of conventional hybrid power source: control when the storage device (4) charged by the distributed power source (2) is in the power supply state by the detection device (10) In response to the signal from the device (8), the load (7) is supplied with electric power from the commercial power supply (1) through the inverter (6) and the changeover switch (9). Capacitor (3) has a function of storing sudden charge in power storage device (4) without waste, and converter (5) has a function of boosting the power when distributed power source (2) is low and storing power in power storage device (4). . In this case, there is no problem with the normal load, but a time delay occurs when the power source is switched, and an instantaneously low voltage is supplied to the load (7). (Figure 1, similar circuit)

In the devised circuit 1, a thyristor switch A (12) connecting the load (7) and the transformer (11) is provided in parallel to the changeover switch (9), and the control device (8) is connected with the commercial power supply (1) to the distributed power supply (8). When switching to 2 ▼, first the control function to operate the distributed power supply (2), and conversely, when switching from the distributed power supply (2) to the commercial power supply (1), the thyristor until the changeover of the changeover switch (9) is completed. An additional control function for energizing the switch A <12> is provided. (Figure 2, Device 1)
The devised circuit 2 is further provided with a thyristor switch B 13 connecting the commercial power source 1 and the load 7 in parallel with the changeover switch 9 and has an additional function for detecting an instantaneous voltage drop. A control device {circle over (8)} having an additional function of immediately operating the thyristor switch B {13} is provided by a signal from the voltage drop detection device {14}. (Fig. 3, Device circuit 2)

In the operation device circuit 1 of the present invention, since the previous power is supplied even at the time of switching, the quality (stabilization) of the power supplied to the load can be protected without causing a momentary drop.
In addition to the above, the devised circuit 2 can forcibly back up with the power from the capacitor (3) power storage device (4) in the middle of power storage even at the momentary drop that occurs outside the commercial power supply (1), and the load (7) Protect the quality of the power supplied. (Fig. 3, Device circuit 2)

Advantages of the present invention Even if the main power source is commercial, it uses natural energy (wind power, boiler power generation, etc.) and regenerative energy generated in the house without waste, thereby saving energy and saving electricity costs.
The generated power is stored to the maximum, and the surplus power is minimized and supplied to the load effectively.
In addition to suppressing the instantaneous voltage drop at the time of power supply switching, it is also prepared for the instantaneous voltage drop at the time of commercial power supply, and a dedicated instantaneous voltage reduction countermeasure device that has a small cost-effectiveness even for an important load becomes unnecessary.

(Similar circuit) It is a block block diagram which shows the structure similar to this invention. (Invention circuit 1) FIG. 2 is a block diagram of a hybrid power supply apparatus according to claim 1 of the present invention. (Convention circuit 2) FIG. 3 is a block configuration diagram in which an instantaneous voltage drop countermeasure function is added to the commercial power system side of FIG.

Claims (1)

In the devised circuit 1, a thyristor switch A (12) connecting the load (7) and the transformer (11) is provided in parallel to the changeover switch (9), and the control device (8) is connected with the commercial power supply (1) to the distributed power supply (8). When switching to 2 ▼, first the control function to operate the distributed power supply (2), and conversely, when switching from the distributed power supply (2) to the commercial power supply (1), the thyristor until the changeover of the changeover switch (9) is completed. An additional control function for energizing the switch A <12> is provided. (Figure 2, Device 1)
The devised circuit 2 is further provided with a thyristor switch B 13 connecting the commercial power source 1 and the load 7 in parallel with the changeover switch 9 and has an additional function for detecting an instantaneous voltage drop. A control device {circle over (8)} having an additional function of immediately operating the thyristor switch B {13} is provided by a signal from the voltage drop detection device {14}. (Fig. 3, Device circuit 2)

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