JPH05288816A - Monitoring apparatus for performance of emergency battery - Google Patents

Abstract

PURPOSE:To improve the reliability of emergency power source by reducing inspection work at a working site, realizing labor-saving, and increasing inspection frequency. CONSTITUTION:Detecting means 32, 33 and 34 are provided on an emergency battery 26 for supplying power supply voltage to various equipment at an emergency in order to detect any abnormality concerning performance monitoring items. The detection results from the means 32, 33 and 34 are obtained through at least either of a display device 30 and an alarm device 31 installed in an operation control room, and the records are outputted thereafter.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a performance monitoring device for an emergency storage battery installed for supplying a stable power supply voltage to equipment in an emergency of a nuclear power plant, for example.

[0002]

2. Description of the Related Art Generally, an emergency storage battery, which is installed to supply a stable DC power supply voltage to equipment in an emergency of a nuclear power plant, is required to have high reliability, and regular performance monitoring is strict. Mandatory and actually done.

FIG. 5 shows a conventional performance monitoring device for an emergency storage battery. In order to supply the DC power supply voltage to the load of the equipment of the nuclear power plant, normally, the AC from the AC bus 1 is sent to the rectifier 3 via the breaker 2 to be converted into DC, and then sent to the DC load 4. This direct current simultaneously charges the emergency storage battery 6 via the circuit breaker 5.

If the power supply of the AC bus 1 is lost, DC is supplied from the emergency storage battery 6 to the DC load 4 via the circuit breaker 5. When such a floating charging method is adopted, stable DC can be supplied to the DC load 4 even in an emergency.

The voltage value and the current value of the emergency storage battery 6 are measured by a voltmeter 7 and an ammeter 8, respectively, and these measurement signals are sent to a display device 10 and an alarm device 11 via a recording device 9. It Conventionally, a specific gravity indicator and a liquid level indicator are incorporated in a part of a large number of storage batteries, and the performance of these items is visually monitored together with the indicated temperature.

[0006]

However, in the emergency storage battery performance monitoring apparatus shown in FIG. 5, in order to monitor the performance of the emergency storage battery, the current value at the time of operating the charging voltage of the storage battery 3 is set in the operating room. Although it is displayed and can be monitored, other items such as liquid specific gravity, liquid water level, and temperature must be regularly visited by the operator and confirmed,
As a result, there is a problem that the inspection work is troublesome and burdens the operator.

The present invention has been made in consideration of the above-mentioned circumstances, and improves the reliability as an emergency power source by reducing inspection work at the site, saving labor, and increasing the frequency of inspection. It is an object of the present invention to provide a performance monitoring device for an emergency storage battery.

[0008]

In order to solve the above-mentioned problems, a performance monitoring device for an emergency storage battery according to the present invention comprises:
In an emergency, the emergency storage battery that supplies the power supply voltage to the equipment is provided with detection means for detecting the monitoring items of its performance, and the detection result of this detection means is provided in at least one of the display device and the alarm device installed in the operation room. It is obtained and the information is output.

[0009]

According to the present invention having the above-mentioned structure, the deterioration of the emergency storage battery is detected by the detecting means for the performance monitoring items such as the voltage drop, the liquid specific gravity drop, and the liquid level drop due to the temperature condition, and the detection result is operated. Since it is possible to monitor at least one of the display device and the alarm device installed in the room, the operator can monitor the performance of the emergency storage battery frequently and continuously in the operation room without going to the site.

[0010]

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 shows a first embodiment of a performance monitoring device for an emergency storage battery according to the present invention.

As shown in FIG. 1, in order to supply the DC power supply voltage to the load of the equipment of the nuclear power plant, the AC from the normal AC bus 21 is sent to the rectifier 23 through the breaker 22 to convert the DC power. After that, it is sent to the DC load 24. This direct current simultaneously charges the emergency storage battery 26, which is a lead storage battery, via the circuit breaker 25. If the power supply of the AC bus 21 is lost, DC is supplied from the emergency storage battery 26 to the DC load 24 via the circuit breaker 25.

Further, the voltage value and the current value of the emergency storage battery 26 are measured by a voltmeter 27 and an ammeter 28, respectively, and these measurement signals are sent to a display device 30 and a display device 30 via a recording device 29 installed in the operator's cab. It is sent to the alarm device 31.

Further, the emergency storage battery 26 is equipped with a thermometer 32, a liquid pycnometer 33 and a liquid level gauge 34 as detecting means, and the thermometer 32, the liquid pycnometer 33 and the liquid level gauge 34 respectively have an oscillator. The detection signals of the thermometer 32, the liquid densitometer 33, and the liquid level gauge 34 are the display devices after the oscillation signals emitted from the respective oscillators are sent to the recording device 29 through the converters 35, 36, and 37. 30 and the alarm device 31.

Here, it is assumed that the alarm device 30 can issue a low specific gravity alarm for liquid specific gravity, a low water level alarm for liquid level, and high temperature and low temperature alarm for temperature. The operating current of the charging voltage is voltmeter 27 and ammeter 2
By using 8 to output to the display device 30 and the alarm device 31, the operator can monitor and obtain an alarm.

Next, the operation of this embodiment will be described.

FIG. 2 shows an example of measurement and monitoring of the liquid level,
The emergency storage battery 26, which has an initial water level LO, decreases to the limit value water level LL after a lapse of time TL due to evaporation or decomposition. Then, the liquid level gauge 34 detects that the water level is low, and this detection signal is oscillated by the oscillator and sent to the recording device 29 through the converter 37, after which the display device 3
0 and the alarm device 31. As a result, the operator can monitor the fact in the driver's cab or hear it as a low water level alarm. These series of operations are the same for liquid specific gravity and temperature.

As described above, according to the present embodiment, the performance of the emergency storage battery 26 can be monitored in the operator's cab without the need for the operator to go to the site, so the workload of the operator can be reduced. Performance monitoring is continuous or whenever necessary.
It can be done easily, and the alarm is automatically issued when the specified value is exceeded, improving reliability.

FIG. 3 shows a second embodiment of the performance monitoring device for an emergency storage battery according to the present invention. The same parts as those in the first embodiment will be designated by the same reference numerals.

In this embodiment, the thermometer 3 for the emergency storage battery 26 is used.
2. The detection signals of the liquid hydrometer 33 and the liquid level meter 34 and the signals of the voltmeter 27 and the ammeter 28 are input to the recording device 29, and the recording result is recorded by the recording device 29 for a long period of time.
By analyzing this record for a long term by the diagnostic device 38, it is possible to diagnose the deterioration tendency in the long term.
Further, it is possible to instruct a periodic maintenance work request according to the analysis result.

Next, the operation of this embodiment will be described.

FIG. 4 shows the tendency of the liquid level to change for a long period of time. The emergency storage battery 26 has an initial water level LO, but after elapse of time TM due to evaporation or decomposition, it drops to the water level LM.
At this time, the diagnostic device 38 can know the expected time TL until the water level reaches the limit value water level LL. This is predicted as an instruction for liquid replenishment.

That is, the detection result of the liquid level of the emergency storage battery 26 is taken into the recording device 29 for a long period of time and is shown as a change tendency. Therefore, by recognizing the decreasing tendency of the liquid level, it is possible to predict the date when the liquid will be replenished next time and to instruct the operator. In this case, the operator may replenish the liquid at an appropriate time before the replenishment deadline.

In addition, it is conceivable that the emergency storage battery 26 itself deteriorates over a long period of time and the water level lowering speed tends to gradually increase. Even in such a case, however, the diagnosis is made by the diagnosis device 38. Then, it is possible to predict the date when the emergency storage battery 26 itself should be replaced, and to instruct the operator.

As described above, according to this embodiment, the tendency of long-term deterioration of the emergency storage battery 26 can be recorded and the operator can be instructed to perform maintenance. Therefore, planned and optimum maintenance work can be selected. Therefore, the reliability of the emergency storage battery 26 can be further improved. The rest of the configuration and operation are the same as in the first embodiment, so description thereof will be omitted.

In each of the above embodiments, the emergency storage battery 26
Although the case where the lead storage battery is applied has been described above, other types of storage batteries can also be applied by changing the measurement item. Further, although both the display device 30 and the alarm device 31 are installed in the driver's cab in each of the above-described embodiments, the present invention is not limited to this. Liquid specific gravity, which is a performance monitoring item,
Liquid level and temperature can be monitored remotely.

[0027]

As described above, according to the performance monitoring device for an emergency storage battery of the present invention, the detection means for detecting the monitoring item of the performance of the emergency storage battery is provided, and the detection result of this detection means is operated. At least one of the display device and alarm device installed in the operation room was obtained and output to that effect.Therefore, it is possible to monitor the performance of the emergency storage battery in the operation room without the operator going to the site. As a result, the burden of inspection work on the operator can be significantly reduced.

Further, if the performance of the emergency storage battery is monitored continuously or whenever necessary, the frequency of inspection increases, and the reliability of the emergency power supply can be improved.

[Brief description of drawings]

FIG. 1 is a block diagram showing a first embodiment of an emergency storage battery performance monitoring apparatus according to the present invention.

FIG. 2 is a graph showing an example of measurement and monitoring regarding a liquid surface in the embodiment of FIG.

FIG. 3 is a block diagram showing a second embodiment of the performance monitoring device for an emergency storage battery according to the present invention.

FIG. 4 is a graph showing a long-term change tendency of the liquid level in the embodiment of FIG.

FIG. 5 is a block diagram showing a conventional performance monitoring device for an emergency storage battery.

[Explanation of symbols]

 21 AC Bus 22 Circuit Breaker 23 Rectifier 24 DC Load 25 Circuit Breaker 26 Emergency Storage Battery 27 Voltmeter 28 Ammeter 29 Recording Device 30 Display Device 31 Alarm Device 32 Thermometer (Detecting Means) 33 Liquid Hydrometer (Detecting Means) 34 Liquid Area gauge (detection means) 38 Diagnostic device

Claims (1)

[Claims] 1. An emergency storage battery for supplying a power supply voltage to equipment in an emergency is provided with detection means for detecting a monitoring item of its performance, and the detection result of this detection means is installed in a driver's cab and a display device and an alarm are provided. A performance monitoring device for an emergency storage battery, which is obtained by at least one of the devices and outputs that effect.