JP2005245190A - Power supply system equipped with thunder detecting means - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a power supply system equipped with a thunder detecting means capable of entirely eliminating the effect of a lightening surge to cope with the occurrence of thunder by the power supply system itself, and capable of stably supplying power with no power failure even at the time of power interruption. <P>SOLUTION: There are provided a thunder detector 12 for detecting far and near thunder, and an uninterruptible power system 9 which incorporates a battery 9c to supply power to a load from a battery 9c at the time of power interruption. When the thunder detector 12 detects remote thunder, it triggers a power generation system 7 to generate power, and if it detects near thunder, the power supply of a main power input 3 is cut off by a circuit breaker 3d, and the output voltage of the power generation system 7 is supplied to the uninteruptible power system 9 by a system switcher 6, thus supplying the power from the power generation system 7 to the load. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a power supply system provided with lightning occurrence detection means, and more particularly, to a power supply system provided with lightning occurrence detection means capable of stably supplying power without being affected by lightning at a long distance or close range.

  In the power supply system, power failure countermeasures against lightning strikes are taken. The lightning countermeasure in the conventional power supply system will be described below with reference to FIGS. FIG. 8 is a block diagram showing the main part of a conventional power supply system. FIG. 9 is a diagram showing a configuration of a conventional power supply system. As shown in FIG. 8, in the conventional power supply system 20, the AC voltage from the commercial AC power supply 23 is input to the system switch 6 via the commercial power supply input unit 21. In addition, an AC voltage from the power generator 7 that generates auxiliary power is input to one input terminal of the system switch 6. The system switch 6 is normally set to supply the AC voltage from the commercial power input unit 21 to the load 25 via the circuit breaker 25a (FIG. 9). Further, when a power failure or lightning occurs, the system switch 6 is switched to supply the alternating voltage from the power generator 7 to the load 25.

  As shown in FIG. 9, the commercial power supply input unit 21 of the conventional power supply system 20 includes a circuit breaker (breaker) 3e and a lightning proof transformer 21a. The lightning-resistant transformer 21a is for reducing the lightning surge superimposed on the commercial AC power supply 23 at the time of lightning occurrence, and protecting the apparatus which is the load 25 from a lightning surge. The power generation device 7 generates power by rotating a generator (ACG) 7 a with a diesel engine (ENG) 7 b or the like, and supplies AC power to a load 25. When a power failure occurs, a power failure of the commercial power input unit 21 is detected by the power failure detector 7f installed in the power generator 7, and the engine 7b of the power generator 7 is started by the power failure detector 7f to generate power. After the output voltage from the power generator 7 is stabilized, the system switch 6 switches the AC power from the commercial power input unit 21 to the AC power from the power generator 7 and supplies it to the load 25. When lightning occurs in the vicinity of the place where the power supply system 20 is installed, the worker first activates the power generation device 7, and after the output voltage from the power generation device 7 stabilizes, the system switch 6 is switched to the commercial power supply. The input unit 21 is switched to the AC power source of the power generator 7 and supplied to the load 25. Furthermore, when the generation of lightning is stopped, the worker supplies the power to the load 25 by switching the system switch 6 from the power generator 7 to the AC power source of the commercial power input unit 21. In the conventional power supply system, when the lightning occurs, the power generation device 7 is started and the power source is switched by the system switch 6 manually.

  In addition, the lightning detector which detects the lightning which generate | occur | produced in the distant place is disclosed by patent document 1. FIG.

Japanese Patent No. 326684

However, the conventional power supply system 20 has the following problems regarding measures against lightning and power outages.
1) The lightning surge superimposed on the commercial AC power supply is reduced by the lightning resistant transformer 21a of the commercial power supply input unit 21, but the lightning surge transformer 21a cannot completely eliminate the influence of the lightning surge. May be mixed in as noise, or a high voltage may be instantaneously applied to the load, causing deterioration of the equipment. For this reason, it is desired to completely cut off the commercial AC line of the commercial power input unit 21 when lightning occurs.
2) When lightning occurs, workers start the power generation device 7 and switch the power source. However, workers are required for these operations. In addition, since the response at the occurrence of lightning is performed at the discretion of the worker, there is a possibility that it cannot be appropriately handled. Although there is a method of estimating the risk of lightning strike by confirming the presence of thunderclouds based on information from weather radar, the cost of the device is high, and management costs are incurred. Also, it is not popular because of the low reliability of thundercloud estimation. For this reason, there is a demand for a power supply system that can stably supply power to a load without requiring an operator at the time of occurrence of lightning and without being affected by lightning at a long distance or close range.
3) Although power is supplied from the power generation device 7 at the time of a power failure, since it takes time from the start of the power generation device 7 until the output voltage is stabilized, the time from when the power failure occurs until the output voltage of the power generation device 7 is stabilized is A power failure occurs because no power is supplied to the load. Therefore, a power supply system that supplies power without a power failure even when a power failure occurs is desired.

  Therefore, the present invention has been made in view of the above problems, and by providing a lightning detector in a conventional power supply system, completely eliminates the effects of lightning surges, and copes with the occurrence of lightning at a long distance or close range. It is an object of the present invention to provide a power supply system including lightning generation detection means that can be performed by the power supply system itself and can stably supply power without instantaneous interruption even when a power failure occurs.

  A power supply system having a lightning occurrence detection means according to the present invention generates lightning occurrence detection means for detecting the occurrence of lightning, main power supply means having a cutoff means capable of shutting off the supply of main power, and auxiliary power. A power generation means, an uninterruptible power supply means capable of supplying power from the power storage means to a load in the event of a power failure, and the main power supply means or the uninterruptible power supply means or the power generation System switching means for switching from two types of electric power to one type of electric power for supply.

  Further, the lightning occurrence detection means of the power supply system provided with the lightning occurrence detection means according to the present invention includes a radio wave detection type lightning occurrence detection means for detecting an impact electromagnetic wave exceeding a certain value generated in a transmission line due to a lightning strike in a distant place, and a close proximity. It is characterized by comprising at least one electrostatic field detection type lightning generation detecting means for detecting a change in electrostatic field immediately before a lightning strike at a distance.

  Further, the power supply system comprising the lightning occurrence detection means according to the present invention shuts off the power supply of the main power supply means by the interruption means when the lightning occurrence detection means detects the lightning, and starts the power generation means. After the output voltage of the power generation means is stabilized, the power from the power generation means is supplied to the uninterruptible power supply means by the system switching means until the output voltage of the power generation means becomes stable. Electric power is supplied to the load by the power storage means of the power failure power supply means.

  Further, the power supply system comprising the lightning occurrence detection means according to the present invention, when the lightning detection lightning detection means detects a lightning strike in a distant place, the power generation means is started to generate electric power, and the electrostatic field detection type When a change in electrostatic field immediately before a lightning strike at a close distance is detected by the lightning occurrence detection means, the power supply of the main power supply means is shut off by the cutoff means, and the power from the power generation means is reduced by the system switching means. The power is supplied to the uninterruptible power supply means, and the load is supplied with the power from the power storage means and the power generation means of the uninterruptible power supply means.

  Further, the power supply system including the lightning occurrence detection unit according to the present invention may detect the lightning detection signal from the lightning occurrence detection unit, and when the lightning detection signal is not generated within a predetermined time, the main power supply unit After confirming the power supply, the system switching means automatically switches the power supply of the uninterruptible power supply means to the main power supply means, and stops the power generation operation of the power generation means.

  Further, the power supply system comprising the lightning occurrence detection means according to the present invention controls the uninterruptible power supply means and the power generation means with the same frequency signal as the frequency and phase of the main power of the main power supply means, The frequency and phase of the uninterruptible power supply means and the output power supply of the power generation means are the same as the frequency and phase of the main power.

  According to the power supply system equipped with the lightning occurrence detection means according to the present invention, the shock absorber detects a shocking electromagnetic wave of a certain value or more caused by a lightning strike in a distant place seen from the position of the lightning detector, starts the power generator, In preparation for a power failure due to a lightning strike, a change in electrostatic field immediately before a lightning strike at a close distance is detected, the main power input line is completely shut off, and auxiliary power is automatically supplied from the power generator to the uninterruptible power supply. Therefore, electric power can be supplied to the load without any interruption. In addition, it is not affected by lightning surges by completely shutting off the main power input line.

  In addition, the conventional lightning detection is not efficient because there is a lot of useless operation because the power supply system is operated by issuing an alarm when a lightning occurs within a certain detection range. Since the power supply system including the lightning occurrence detection means according to the present invention can operate the power supply system in response to the occurrence of lightning at a long distance or close distance, it can be efficiently operated without useless operation.

  In addition, since the occurrence of lightning can be detected before a lightning strike at a close distance by detecting a change in the electrostatic field, it is possible to perform advance control such as shutting off the main power input line and supplying auxiliary power.

  In addition, since the power generator is equipped with an uninterruptible power supply to back up power outages for a certain period of time until the output voltage of the power generator stabilizes, power is supplied to the load without causing an instantaneous interruption. be able to.

  Further, when lightning does not occur within a predetermined time, the power supply system itself switches the power supply of the load to the main power input line and stops the operation of the power generator, so that no operation by the worker is necessary.

  Hereinafter, an embodiment of a power supply system provided with lightning occurrence detection means according to the present invention will be described with reference to FIGS. FIG. 1 is a diagram showing a block configuration of a power supply system provided with lightning occurrence detection means according to the present invention, and FIG. 2 is a diagram showing details of each block of the power supply system provided with lightning occurrence detection means. In addition, what has the same structure and function as the conventional power supply system 20 is attached | subjected and demonstrated with the same code | symbol.

  As shown in FIG. 1, a power supply system 1 having a lightning occurrence detection unit according to the present invention includes a main power input unit 3 as a main power supply unit that supplies power from a main power source 22, and auxiliary power. A power generation device 7 as a power generation means to generate, an uninterruptible power supply (UPS) 9 as an uninterruptible power supply means for supplying power from the battery to the load 25 in the event of a power failure by incorporating a battery or the like as a power storage means, System switching unit 6 serving as a system switching unit that switches power of the power input unit 3 or the power generation device 7 to supply power to the uninterruptible power supply 9, and a lightning generation detection unit that detects the occurrence of lightning at a long distance It consists of a lightning detector 12.

  As shown in FIG. 1 and FIG. 2, on the main power input line 3 a of the main power input unit 3, a circuit breaker 3 d as a shut-off means for cutting off the main power power supply 22, and a main power supply 22 for maintenance and inspection. A circuit breaker 3e (shown in FIG. 2) for cutting off the voltage of the power supply, a power transformer 3b for lowering the voltage from the main power supply 22 and for electrical insulation between the input side and the output side, and a power transformer A lightning arrester (arrester) 3c for reducing lightning surge from the main power supply 22 connected to the primary side (input) of 3b is connected. The circuit breaker 3d is an electromagnetic contactor or the like that opens and closes a contact by the attractive force of an electromagnet, and the circuit breaking operation is controlled by a lightning detection signal from the lightning detector 16 of the lightning detector 12. The lightning arrester (arrester) 3c is for reducing a lightning surge from the main power supply 22 and constitutes a detector 17 described later.

  The lightning detector 12 includes a detection unit 17 that detects the occurrence of lightning at a long distance or a close distance, and a lightning detection unit 16 that detects the occurrence of lightning from the output of the detection unit 17 and generates a lightning detection signal. .

  The uninterruptible power supply (UPS) 9 is for supplying electric power from a battery or the like to the load 25 at the time of a power failure. As shown in FIG. 2, the uninterruptible power supply (UPS) 9 has an input terminal 9 g to which an AC voltage output from the system switch 6 is applied, and an output terminal 9 h that supplies an AC voltage to the load 25. doing. Between the input terminal 9g and the output terminal 9h, breakers 9d and 9e for cutting off the AC input voltage from the input terminal 9g, an AC / DC converter (converter) 9a for converting the AC voltage into a DC voltage, A DC / AC converter (inverter) 9b that converts a DC voltage from the AC / DC converter 9a or the battery 9c into an AC voltage is sequentially connected in series. An automatic bypass circuit 9i that supplies the AC voltage from the input terminal 9g to the output terminal 9h without being converted by the AC / DC converter 9a and the DC / AC converter 9b is connected to the AC switch 9f. The AC switch 9f switches to either the output end of the automatic bypass circuit 9i or the output end of the DC / AC converter 9b and outputs an AC voltage to the output terminal 9h.

  Further, the battery 9c is built in the UPS 9, and the positive end of the battery 9c is connected to a connection point between the AC / DC converter 9a and the DC / AC converter 9b. Further, the UPS 9 has a built-in voltage monitoring circuit (not shown) for monitoring the AC power failure and instantaneous power failure input to the input terminal 9g. 9c outputs an AC voltage from the DC / AC converter 9b to the output terminal 9h. The UPS 9 may use a large-capacity capacitor in addition to the battery 9c as the power storage means.

  As another example of the UPS 9, AC power from the input terminal 9g is converted into DC power by the AC / DC converter 9a having a high power factor in a state where the automatic bypass circuit (9i) is disconnected by the AC switch 9f. Then, this can be used for charging the battery 9c, and it can be converted into alternating current power again by the DC / AC converter 9b and supplied to the output terminal 9h. In the constant inverter power supply method, the failure due to the input power is not transmitted to the load 25 at the subsequent stage of the output terminal 9h, and the DC power from the battery 9c is momentarily interrupted even when the input power is blacked out or momentarily stopped. Without being sent to the DC / AC converter 9b, stable power can be supplied to the load 25.

  As shown in FIG. 2, the power generation device 7 that generates auxiliary power generates power by rotating the generator 7 a with a diesel engine 7 b or the like, and sets the magnitude and frequency of the output voltage from the generator 7 a to predetermined values. Thus, the automatic voltage regulator 7c automatically adjusts. The power output from the automatic voltage regulator 7c is output to the system switch 6 via a circuit breaker (breaker) 7e. The circuit breaker (breaker) 7e is for protecting the power generation device 7 by interrupting the output line when the output of the power generation device 7 is overloaded. The power generation device 7 detects a power failure of the main power input unit 3 with the power failure detector 7f, and the power failure detector 7f starts the engine 7b of the power generation device 7 to generate power.

  The system switch 6 shown in FIGS. 1 and 2 supplies power to the UPS 9 by switching between two types of power of the main power input unit 3 and the power generator 7. The system switcher 6 automatically switches the power supply by a signal from a control device (not shown) by using a non-instantaneous type that can switch the power supply at high speed. By using the non-instantaneous system switch 6, it is possible to prevent an instantaneous power interruption associated with power switching.

  Next, lightning detection means for detecting lightning from the current and voltage flowing into the main power input line 3a of the main power input unit 3 will be described with reference to FIGS. In addition, since the structure and operation | movement regarding a lightning detector are explained in full detail in patent document 1, detailed description is abbreviate | omitted.

  The lightning detector for detecting the occurrence of lightning is a radio wave detection type lightning detector for detecting lightning strikes in the far field shown in FIG. It consists of a detector. The radio wave detection type lightning detector consists of a radio wave detection unit that detects impact electromagnetic waves generated by lightning strikes in remote areas, and a lightning detection unit that detects lightning from impact electromagnetic waves from the radio wave detection unit. The electric field detection type lightning detector includes an electrostatic field detector that detects a change in electrostatic field at a close distance and a lightning detector that detects lightning from the change in electrostatic field of the electrostatic field detector.

  FIG. 3 is a block diagram showing a configuration of the radio wave detection type lightning detector 13 that uses the low-pass filter 18 a for the radio wave detection unit 18. FIG. 4 is a block diagram showing the configuration of the electrostatic field detection type lightning detector 14 using the discharge unit 19b in the electrostatic field detection unit 19. As shown in FIG. As shown in FIGS. 3 and 4, the lightning detection unit 16 includes a coherer 16a that detects a change in the strength of an electromagnetic field and an electrostatic field, and a decoherer 16b and a coherer 16a for recovering the insulating properties of the coherer 16a that has been cohered. The timer circuit 16c is activated by a signal change from the timer to transmit lightning detection for a certain time, and the signal output circuit 16d outputs the signal of the timer circuit 16c to the outside.

  The radio wave detection unit 18 of the radio wave detection type lightning detector 13 for detecting a lightning strike in a distant place shown in FIG. 3 includes a low-pass filter (transformer) 18a grounded between the main power input unit 3 and a lightning arrester (arrester) 3c and a ground point. It detects the voltage of. The voltage from the impact electromagnetic wave generated by the lightning strike in the far field is absorbed by the arrester 3c, flows as a current through the primary side of the transformer constituting the low-pass filter 18a, and flows into the grounding point.

  The transformer 18a of the radio wave detection unit 18 shown in FIG. 3 outputs a signal having a frequency of about 1 MHz or less inputted to the primary side to the secondary side and does not output a signal having a frequency exceeding 1 MHz to the secondary side. It has characteristics.

  The induced voltage due to the electromagnetic wave generated by the lightning strike in the remote area is superimposed on the transmission voltage of the transmission line and reaches the main power input unit 3. The induced voltage flows as a current to the arrester 3c as a lightning surge, and flows to the ground point through the low-pass filter 18a formed of a transformer shown in FIG. For the transformer, a voltage having a frequency component of 1 MHz or less is selected and applied to the coherer 16 a of the lightning detector 16. On the other hand, the transformer 18a also serves to protect the coherer from induced lightning, which is a weak lightning. The coherer 16a transitions to the fixed energized state (coherence) due to a change in the applied voltage. At this time, the energization state of the coherer 16a is detected by a switching operation of a transistor or the like to start the timer circuit 16c. In addition, the decoherer 16b vibrates the energized coherer 16a to restore the insulation, and prepares for the next lightning electromagnetic wave input. By detecting the energization state of the coherer 16a with a transistor, it is possible to detect a lightning strike in a distant place.

  Note that the bias voltage of the transistor that detects the energization state of the coherer 16a is adjusted in advance by a variable resistor, and a threshold value can be set for the switching operation of the transistor. Thereby, the energization state of the coherer 16a can be detected with respect to a voltage of a certain value or more. Since the electromagnetic wave intensity is converted into a voltage, it is possible to detect a shocking electromagnetic wave of a certain value or more by adjusting the bias voltage of the transistor.

  Further, the timer time of the timer circuit 16c of the lightning detector 16 can be varied. When lightning is detected and lightning is detected again within the timer time, the timer time from when the last lightning was detected becomes valid.

  The electrostatic field detector 19 of the electrostatic field detection type lightning detector 14 that detects a change in electrostatic field immediately before a lightning strike at a short distance shown in FIG. 4 is connected between a lightning arrester (arrester) 3c from the main power input unit 3 and a ground point. The discharge from the discharge portion (air discharge gap) 19b grounded to the ground is detected.

  In the discharge part (air discharge gap) 19b shown in FIG. 4, a change in electrostatic field occurs due to a change in voltage between a thundercloud and the ground immediately before a lightning strike at a close distance, and corona discharge occurs. For this reason, electromagnetic waves are generated by corona discharge generated in the discharge part (air discharge gap) 19b, and the coherer 16a of the lightning detection part 16 cohers. By detecting the energization state of the coherer 16a with a transistor, it is possible to detect lightning at close range.

  Next, the power control operation in the lightning detection of the power supply system 1 provided with the lightning occurrence detection means having the above configuration will be described. The power control in the lightning detection described below is performed by a control device (not shown) built in the power supply system 1 provided with the lightning occurrence detection means.

  FIG. 5 is a flowchart showing the power control operation in the lightning detection of the power supply system provided with the lightning occurrence detection means. As shown in FIG. 5, it is first checked whether or not the far lightning detection signal of the radio wave detection type detector 13 that detects a lightning strike in the far place is “ON” (step S1). When the remote mine detection signal of the radio wave detection type detector 13 is not “ON”, that is, when it is “OFF”, other processing than the remote mine detection signal check, such as power failure detection, is performed, and other processing is performed. After that, the remote landmine detection signal of the radio wave detection type detector 13 is checked. If the far-field lightning detection signal of the radio wave detection type detector 13 is “ON”, it is confirmed whether the power generation device 7 has stopped operating (step S2), and when the power generation device 7 is in operation. Shifts to step S4. After confirming that the power generation device 7 has stopped operating, the power generation device 7 is started so that auxiliary power can be supplied to prepare for a power failure due to a lightning strike or the like (step S3).

  Next, after the power generation device 7 is started, it is checked whether or not the closest lightning detection signal of the electrostatic field detection type lightning detector 14 that detects a change in electrostatic field immediately before a lightning strike at a close distance is “ON” (step S4). . If the closest lightning detection signal of the electrostatic field detection type lightning detector 14 is not “ON”, it is checked whether the far ground lightning detection signal of the radio wave detection type detector 13 is “OFF” (step S5). When the far ground lightning detection signal of the radio wave detection type detector 13 is “OFF”, the frequency of lightning strikes is low, so the process proceeds to step S17 to stop the operation of the power generation device 7 (step S17). ). When the far landmine detection signal of the radio wave detection type detector 13 is “ON”, the process proceeds to step S4. If the near-field lightning detection signal of the electrostatic field detection type lightning detector 14 is “ON” in step S4, the electromagnetic contactor 3d of the main power input unit 3 is turned off so as not to be affected by lightning. The main power input line 3a is disconnected to release (step S6). By cutting off the main power input line 3a, the main power source 22 is not supplied to the UPS 9, so the UPS 9 itself detects a power failure, switches to battery operation, and supplies power to the load 25 (step S7).

  Next, after the main power input line 3a is cut off, it is checked whether the output voltage from the power generator 7 is stable (step S8), and after the output voltage from the power generator 7 is stabilized, the system switch 6 is generated. Automatic switching to the device 7 side is performed to supply auxiliary power from the power generation device 7 to the UPS 9 (step S9). Since the auxiliary power is supplied from the power generation device 7, the UPS 9 switches from the battery operation to the auxiliary power operation from the power generation device 7 when the power supply is restored, and supplies power to the load 25 (step S <b> 10). Thereby, after detecting lightning, the main power input line 3a is cut off, and auxiliary power from the power generator 7 is supplied to the UPS 9.

  Next, it is checked whether or not the main power source 22 of the main power input unit 3 has a power failure (step S11). This is to confirm whether the power transmission from the substation has been stopped by lightning. When the main power source 22 has a power failure, the supply of auxiliary power from the power generator 7 is continued, and the system waits until the main power source 22 recovers from the power failure. When the main power supply 22 is normally input, it is checked whether the closest lightning detection signal of the electrostatic field detection type lightning detector 14 is “OFF” (step S12). When the electrostatic field detection type lightning detector 14 does not detect lightning within a predetermined time, the closest lightning detection signal is “OFF”. If the close lightning detection signal of the electrostatic field detection type lightning detector 14 is “ON”, the process proceeds to step S11 and waits until the close lightning detection signal of the electrostatic field detection type lightning detector 14 becomes “OFF”. Like that.

  Next, when the closest lightning detection signal of the electrostatic field detection type lightning detector 14 is “OFF” in step S12, the preset operation mode is checked. The operation mode specifies whether to switch to the main power source 22 or to check the far landmine detection signal and switch to the main power source 22 when the closest lightning detection signal is “OFF” in step S12. . When the operation mode is “0”, the far landmine detection signal is checked. When the operation mode is other than “0”, the main power supply 22 is switched. It is checked whether the operation mode is “0” (step S13). If the operation mode is other than “0”, the process proceeds to step 15. When the operation mode is “0”, it is checked whether the far landmine detection signal of the radio wave detection type detector 13 is “OFF” (step S14). When the radio wave detection type detector 13 does not detect lightning within a predetermined time, the far landmine detection signal is “OFF”. When the far landmine detection signal of the radio wave detection type detector 13 is “ON”, it waits until the far landmine detection signal of the radio wave detection type detector 13 becomes “OFF”.

  When the far-ground lightning detection signal of the radio wave detection type detector 13 is “OFF”, the main power source 22 is normally input, so the electromagnetic contactor 3d of the main power input unit 3 is closed (step S15).

  Next, the system switch 6 is automatically switched to the main power input unit 3 to supply the main power source 22 to the UPS 9 (step S16). The power of the main power input unit 3 is supplied to the UPS 9, and the UPS 9 supplies the power of the main power input unit 3 to the load 25. Since the main power supply 22 has returned to normal, auxiliary power for the power generation device 7 is not required, so the operation of the power generation device 7 is stopped (step S17).

  FIG. 6 shows a timing chart of each signal of the power control operation in the lightning detection of the power supply system provided with the lightning generation detecting means described above. The timing chart shown in FIG. 6 shows a case where the operation mode is “0”. As shown in FIG. 6, when the far landmine detection signal of the radio wave detection type detector 13 is “ON” at t <b> 1, the power generation device 7 is started so that power can be supplied. When the nearest lightning detection signal of the electrostatic field detection type lightning detector 14 is “ON” at t2, the contact of the electromagnetic contactor 3d of the main power input unit 3 is released to shut off the main power source 22. . Since the UPS 9 is not supplied with power, the UPS 9 detects a power failure and switches to battery operation. After the output voltage from the power generation device 7 is stabilized, the system switch 6 is automatically switched to the power generation device 7 side to supply power from the power generation device 7 to the UPS 9. The UPS 9 is switched from battery operation to normal operation because power is supplied from the power generation device 7. In addition, the power generation device 7 is started so that power can be supplied.

  Next, after confirming that the closest lightning detection signal of the electrostatic field detection type lightning detector 14 is “OFF” at t3 shown in FIG. 6, the far field lightning detection signal of the radio wave detection type detector 13 becomes t4 shown in FIG. Is confirmed to be “OFF”, the contact of the electromagnetic contactor 3d of the main power input unit 3 is closed, and the main power source 22 is energized. After switching the contact of the electromagnetic contactor 3d, the system switch 6 is automatically switched to the main power input unit 3 to supply power to the UPS 9. The UPS 9 is switched to normal operation, and the main power supply 22 is supplied to the load 25. After switching the system switch 6 to the power input unit 3, the operation of the power generator is stopped.

  In the embodiment shown in FIG. 5 and FIG. 6, the far mine detection signal is checked first. However, for example, a close lightning occurs like a direct type lightning, and the far mine detection signal is “OFF”. In the state of “”, when the closest lightning detection signal is “ON”, the power generation device 7 may be started and the control from step S6 shown in FIG. 5 may be performed.

  As described above, according to the power supply system provided with the lightning occurrence detection means in the remote area and the close according to the present invention, the lightning generated in the remote area is detected, the power generation device is started, and it is prepared for a power failure, By shutting off the main power supply 22 before a lightning strike at a close distance, it is possible to completely eliminate the influence of the lightning surge and to cope with the occurrence of lightning by the power supply system itself. In addition, even when a power failure occurs, it is possible to stably supply power without a power failure.

  Since the power supply system including the lightning occurrence detection means according to the present invention can operate the power supply system in response to the occurrence of lightning at a long distance or close distance, it can be efficiently operated without useless operation.

  In addition, since the occurrence of lightning can be detected before a lightning strike at a close distance by detecting a change in the electrostatic field, it is possible to perform advance control such as shutting off the main power input line and supplying auxiliary power.

  The lightning detection of the power supply system provided with the far and near lightning generation detection means described above is performed by disposing the detection unit 17 in the arrester 3c from the input power source of the main power input line 3b of the main power input unit 3. However, you may make it receive an impact electromagnetic wave using the antenna for the detection part 17 currently disclosed by patent document 1. FIG.

  Next, a power supply system equipped with frequency-synchronized lightning generation detection means for preventing an instantaneous interruption occurring during power switching by controlling the uninterruptible power supply and the power generator in synchronization with the frequency of the main power supply will be described. . FIG. 7 is a diagram showing blocks constituting a power supply system including a frequency-synchronized lightning occurrence detection unit. In addition, what has the same structure and function as a power supply system provided with the lightning generation | occurrence | production detection means shown in FIG.1 and FIG.2 is attached | subjected and demonstrated with the same code | symbol. 7 detects the frequency and phase of the main power source 22 input from the output side of the circuit breaker 3d of the main power input unit 3, and detects the same frequency as the main power source 22. It is a transmitter that outputs a phase. The reference synchronous power supply frequency generator 10 continuously outputs a frequency signal even when the main power supply 22 is shut off. The frequency signal of the reference synchronous power supply frequency generator 10 is output to the external control type DC / AC converter 9j of the UPS 9 and the voltage frequency adjuster 7g of the power generator 7. Since the external control type DC / AC converter 9j of the UPS 9 performs switching for generating alternating current in synchronization with the frequency signal of the reference synchronous power supply frequency generator 10, it is the same as the frequency of the main power supply 22 and has the same phase. AC power is output. In addition, the voltage frequency adjuster 7g of the power generation device 7 adjusts the frequency of the generated power by the frequency signal of the reference synchronous power supply frequency generation unit 10, and an AC power supply having the same phase as that of the main power supply 22 is aligned. Is output.

  When a lightning detection signal is output from the lightning detector 12, the main power source 22 is shut off by the circuit breaker 3d of the main power input unit 3, and power is supplied from the battery 9c of the UPS 9, and the power generator 7 Is started and auxiliary power is output, and is switched to auxiliary power of the power generator 7 by the system switch 6 and supplied to the load 25. At this time, the power output from the UPS 9 and the auxiliary power output from the power generation device 7 are the same in frequency as the main power supply and have the same phase. Therefore, when the UPS 9 starts battery operation, the power switch of the system switch 6 is switched. Because the voltage and frequency are the same at the moment, no instantaneous interruption occurs.

  As described above, by using the power supply system equipped with the frequency-synchronized lightning detection means according to the present invention, stable power is supplied because no power failure occurs when power is switched at the time of lightning detection or power failure. can do.

It is a figure which shows the block configuration of the power supply system provided with the lightning generation | occurrence | production detection means by this invention. It is a figure which shows the detail of each block of a power supply system provided with the lightning generation | occurrence | production detection means. It is a block diagram which shows the structure of the electromagnetic wave type lightning detector which uses a low-pass filter for an electromagnetic wave detection part. It is a block diagram which shows the structure of the electrostatic field detection type lightning detector which uses the discharge part for the electrostatic field detection part. It is a flowchart which shows the control operation of the power supply in the lightning detection of the power supply system provided with the lightning generation | occurrence | production detection means. It is a figure which shows the timing chart of each signal of the control operation of a power supply in the lightning detection of a power supply system provided with the lightning generation | occurrence | production detection means. It is a figure which shows the block which comprises the power supply system provided with the frequency synchronous type lightning generation | occurrence | production detection means. It is the figure which showed the principal part of the conventional power supply system with the block configuration. It is a figure which shows the structure of the conventional power supply system.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Power supply system provided with lightning generation detection means 3 Main power input part 3a Main power input line 3b Power transformer 3c Lightning arrester (arrester)
3d circuit breaker (electromagnetic contactor)
3e, 7e, 9d, 9e, 25a Circuit breaker (breaker)
6 System switch 7 Power generator 7a Generator (ACG)
7b Engine (ENG)
7c Automatic voltage regulator 7d Voltage detector 7f Power failure detector 7g Voltage frequency regulator 9 Uninterruptible power supply (UPS)
9a AC / DC converter 9b DC / AC converter 9c Battery 9f AC switch 9g Input terminal 9h Output terminal 9i Automatic bypass circuit 9j External control type DC / AC converter 10 Reference synchronous power supply frequency generator 12 Lightning detector 13 Radio wave detection Type lightning detector 14 electrostatic field detection type lightning detector 16 lightning detector 16a coherer 16b decoherer 16c timer circuit 16d signal output circuit 17 detector 18 radio wave detector 18a low-pass filter (transformer)
19 Electrostatic field detector 19b Discharge unit (air discharge gap)
20 Conventional power supply system 21 Main power input unit 21a Lightning transformer 22 Main power supply 23 Commercial AC power supply 25 Load

Claims (6)

  Power outage with built-in lightning generation detection means for detecting the occurrence of lightning, main power supply means with a means for shutting off the main power supply, power generation means for generating auxiliary power, and chargeable power storage means An uninterruptible power supply means that can sometimes supply power from the power storage means to the load, and the main power supply means or the uninterruptible power supply means or the power generation means are switched from one type of power to one type of power. A power supply system comprising lightning generation detection means, comprising: a system switching means for supply.   The lightning generation detection means is a radio wave detection type lightning generation detection means for detecting shock electromagnetic waves of a certain value or more generated in a transmission line due to a lightning strike in a distant place, and an electrostatic field detection for detecting a change in electrostatic field immediately before a lightning strike at a close distance. 2. The power supply system with lightning occurrence detection means according to claim 1, comprising at least one type of lightning occurrence detection means.   When lightning is detected by the lightning generation detection means, the power supply of the main power supply means is shut off by the cutoff means, the power generation means is started to generate power, and after the output voltage of the power generation means is stabilized, Supplying power from the power generation means to the uninterruptible power supply means by system switching means, and supplying power to the load by the power storage means of the uninterruptible power supply means until the output voltage of the power generation means is stabilized. The power supply system provided with the lightning generation | occurrence | production detection means of Claim 1 characterized by the above-mentioned.   When a lightning strike at a distant place is detected by the radio wave detection type lightning occurrence detection means, the power generation means is started to generate electric power, and the electrostatic field detection type lightning occurrence detection means detects a change in electrostatic field immediately before the lightning strike at a close distance. When detected, the power supply of the main power supply means is shut off by the shut-off means, the power from the power generation means is supplied to the uninterruptible power supply means by the system switching means, the uninterruptible power supply means 2. The power supply system with lightning generation detection means according to claim 1, wherein electric power is supplied to the load by electric power from the power storage means and the power generation means.   After detecting the lightning detection signal from the lightning generation detection means, if the lightning detection signal does not occur within a predetermined time, after confirming the power supply of the main power supply means, the system switching means automatically 2. The power supply system with lightning generation detection means according to claim 1, wherein the power supply means switches the power supply to the main power supply means and stops the power generation operation of the power generation means. The uninterruptible power supply means and the power generation means are controlled with the same frequency signal as the main power frequency and phase of the main power supply means, and the frequency and phase of the output power of the uninterruptible power supply means and the power generation means 2. The power supply system with lightning occurrence detection means according to claim 1, wherein the power supply frequency is the same as the frequency and phase of the main power.

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