JP2003070185A - Power converter monitor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a power converter monitor which can reduce works of monitoring and maintenance, etc., by carrying out a self-diagnostics of a power converter which cooperates in an electric power system and an analysis of the electric power system automatically, and can aid an optimum facility design by monitoring the electric power system. SOLUTION: A trouble signal is transferred to a monitoring control device 11 by a fault detection means 12 when a fan 14 of a power converter 10 is stopped by a trouble. The monitoring control device 11 determines the trouble of the cooling fan 14 and the trouble content, and displays the trouble contents, a trouble position and a procedure of a recovery operation in a display 13. By this means an operator who is not familiar with the power converter 10 can carry out maintenance and restoration of the equipment easily.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a power converter using a semiconductor connected to a power system, such as a reactive power compensating device, an active filter device, a rectifying device, etc. used in a factory such as a steel industry or an electric railway. The present invention relates to a power converter monitoring device that monitors power.

[0002]

2. Description of the Related Art FIG. 8 shows a conventional power converter. In the figure,
Reference numeral 10 is a power converter, and 13 is an indicator provided in the power converter 10.

In the conventional power converter, the operation information of the power converter 10 is the operating status such as running or stopped, the failure status of the device, and the measurement result of the voltage and current required for the operation of the power converter 10. Is displayed on the display unit 13,
The device user could not obtain information other than the power converter 10. Therefore, in order to monitor the state of the electric power system and the state of the device, another device is required, and a specialist monitor who operates the device is required.

[0004]

[Problems to be Solved by the Invention] Monitoring control of electric power equipment,
Operation and maintenance inspections are carried out independently for each system in which they are installed. However, there is a shortage of personnel who always carry out such monitoring and maintenance properly and accurately, and it is desired to reduce the management cost.

Further, in small-scale power equipment, there are many cases in which work such as monitoring and maintenance is omitted, or there is no engineer who has knowledge of the equipment.

On the other hand, with the recent development of the information industry, stable and highly reliable power supply is desired as a factor for ensuring the reliability of communication, and distributed power sources such as wind power generation also develop. Therefore, the diversity and reliability of the power system are desired, and it is necessary to design the system for the optimum power usage.

In view of the social tendency and problems described above, an object of the present invention is to automatically perform self-diagnosis of a power converter connected to a power system and analysis of the power system, thereby performing work such as monitoring and maintenance. An object of the present invention is to provide a power converter monitoring device capable of reducing the power consumption and assisting the optimum equipment design by monitoring the power system.

[0008]

In order to solve the above-mentioned problems, the power converter monitoring device according to the present invention according to the present invention diagnoses a failed portion when a failure occurs in the power converter. It is characterized by comprising a diagnostic means for performing and a failure part diagnosed by the diagnostic means and an output means for outputting guide information of a work procedure for restoration.

According to the present invention having such a configuration, even a user who is not familiar with the power converter can easily perform maintenance and restoration of the device.

According to a second aspect of the present invention, there is provided a power converter monitoring device, which includes a converting means for processing data regarding an operating state or an output state of the power converter and converting the data into information of a predetermined format, and the converting means. And an output means for outputting the information in the predetermined format obtained by the above.

According to the present invention having such a configuration, it becomes possible for an administrator who uses the power converter to omit the work of re-processing the data of the device in accordance with the business form, thereby improving the convenience. You can

According to a third aspect of the present invention, there is provided an electric power converter monitoring apparatus which calculates an electric power loss during operation of the electric power converter from data relating to an operating state or an output state of the electric power converter, and the arithmetic operation. The present invention is characterized by including a calculating means for calculating the running cost of the power converter based on the power loss calculated by the means, and an output means for outputting the running cost calculated by this means.

According to the present invention having such a configuration, since the manager of the power converter can properly understand the running cost of the device, it is possible to omit the work of calculating the operating cost of the power converter. By monitoring the running cost, you can consider the optimal operation method.

According to a fourth aspect of the present invention, there is provided a power converter monitoring device which comprises a measuring means for measuring voltage and current of a power system to which the power converter is connected, and a system based on data measured by the measuring means. It is characterized in that it is provided with a computing means for computing data on the state and a diagnostic means for diagnosing the state of the power system from the data on the system state computed by the computing means.

According to the present invention having such a configuration, it becomes possible to integrate the power converter and the state monitoring of the power system to which the power converter is connected.

According to a fifth aspect of the present invention, there is provided a power converter monitoring device including a measuring means for measuring the output of the power converter.
Prediction means for predicting the output of the power converter that can be estimated in advance by the operation of the power converter is compared with the output measured by the measuring means and the output predicted by the prediction means, and the power converter or the power converter is connected. And a diagnostic means for diagnosing the state of the electric power system that is present.

According to the present invention having such a configuration, it is possible to detect an abnormality in the power converter or the power system to which the power converter is connected at an early stage.

According to a sixth aspect of the present invention, there is provided an electric power converter monitoring apparatus which comprises measuring means for measuring the internal state of the electric power converter, recording means for recording the data measured by the measuring means, and this recording means. And a judgment means for judging the life of the power converter or the time to replace the internal article from the data recorded by the method.

According to the present invention having such a configuration, it is possible to properly judge the life of the apparatus or the time to replace the internal article, and therefore the user can appropriately perform maintenance and maintenance work.

According to a seventh aspect of the present invention, there is provided a power converter monitoring device according to any one of the first to sixth aspects, wherein the output data from any one of the means is output. It is characterized in that it is provided with communication means for transmitting to a place distant from the power converter, and data transmitted at a place distant from the power converter is processed by a predetermined means.

According to the present invention having such a configuration, it becomes possible to remotely operate and monitor the power converter or the power converter to which the power converter is connected.

[0022]

DETAILED DESCRIPTION OF THE INVENTION Embodiments of the present invention will be described in detail below with reference to the drawings. In the following embodiments, the power converter using a semiconductor is shown as 10. However, the power converter is a well-known fact, and its description is omitted.

(First Embodiment) A power converter monitoring apparatus according to a first embodiment of the present invention will be described with reference to FIG. The feature of this first embodiment shown in FIG. 1 is that it is composed of a power converter 10 and a monitor and control device 11 capable of recording and calculating on the device with a display. The monitoring control device 11 further includes in the power converter 10,
Failure detection means 1 for detecting a failure in each part of the power converter 10
Equipped with 2.

The operation of this embodiment will be described. When a failure occurs in the power converter 10, for example, when the fan 14 for cooling the semiconductor used in the power converter 10 is stopped due to the failure, a failure signal is sent from the failure detection means 12 to the monitoring control device 11. To be Monitoring and control device 11
Judges the failure of the cooling fan 14 and the details of the failure from the failure signal, and displays the indicator 13 on the monitor controller 11.
Display the details of the failure and the location where the failure occurred. Failure detection means 1
2 is a function capable of automatically measuring the content of the failure, for example, a means for measuring the operating state of the cooling fan 14 such as a decrease in the number of revolutions or a decrease in the air flow, or monitoring with images such as a camera or video, and image processing. It consists of means for analyzing the location of failure and performing automatic diagnosis. The monitoring control device 11 can show detailed information based on these information.

Further, the monitor control device 11 has a function of displaying the processing method on the display 13 to the user of the power converter 10 when the cooling fan 14 fails, for example. For example, the operating method and the operating method of the power converter 10 in the case of a failure, and detailed information of the cooling fan 14 and guide information of a recovery work procedure such as a replacement procedure are displayed.

By doing so, even a user who is not familiar with the power converter 10 can easily perform maintenance and restoration of the device.

The output means for notifying the user is not limited to the display 13, but the monitor control device 11 is provided with a medium such as a voice or a moving image so that a large amount of information can be given to the user. Therefore, convenience is improved.

(Second Embodiment) A power converter monitoring device according to a second embodiment of the present invention will be described with reference to FIG. In FIG. 2, reference numeral 11 records the operating state of the power converter 10 such as operation, stoppage or failure, and the output state of the voltage or current output by the power converter 11 or calculates and processes the recorded data. It is a supervisory control device. Also, the monitoring control device 1
1 includes output devices such as a display 13 and a printer 15.

The monitoring control device 11 records data on the operating state and output state of the power converter 10 in real time or at regular time intervals. The recorded data is automatically rearranged by the supervisory control device 11 according to the format set by the user of the device, or is subjected to processing such as arithmetic processing to be converted into another format such as active power. And record again.

Further, the supervisory control device 11 includes the power converter 1
A user of 0 has a function of processing data, such as a daily work report used in daily work, and can output it by the printer 15 or the like.

By doing so, it becomes possible for the administrator who uses the power converter 10 to omit the work of reprocessing the data of the device according to the business form, and to improve the convenience.

The recorded data may be automatically sent by e-mail to the administrator or the like instead of being output by the printer 15 or the like.

(Third Embodiment) A power converter monitoring device according to a third embodiment of the present invention will be described with reference to FIG. In FIG. 3, reference numeral 11 is a monitoring control device that records the operating state and output state of the power converter 10 and calculates and processes the recorded data.

The power converter 10 using a semiconductor generally performs a power conversion operation by a switching operation. At that time, power loss occurs in the power converter 10 due to switching of the semiconductor. This power loss depends on the operating mode such as output voltage and current and the environment around the device. Moreover, since the control device 16 that controls the power converter 10 is also configured by an electric circuit, power loss occurs. The monitoring control device 11 calculates this power loss from the recorded operating time, operating state, and output state, and calculates and outputs the running cost of the device from the power loss and efficiency during operation of the power converter 10 and the operating period. .

By doing so, the manager of the power converter 10 can properly understand the running cost of the device.
It is possible to omit the work of calculating the operating expenses of the power converter 10, and the optimum operating method can be examined by monitoring the running cost.

(Fourth Embodiment) A power converter monitoring device according to a fourth embodiment of the present invention will be described with reference to FIG. In FIG. 4, 17 is a measuring means for measuring the voltage and current of the power system 20 to which the power converter 10 is connected, and 11 is a monitoring control for recording data from the measuring means 17 or for processing such as calculation. It is a device.

The monitoring control device 11 uses the recorded power system 2
Monitoring and diagnosing the condition of the power system by calculating the data about the system condition such as reactive power and active power, and harmonics contained in the voltage and current, instantaneous power failure, etc. from the voltage and current of 0 by the calculation function. Is possible.

In general, the state monitoring of the power system is applied by a dedicated monitoring device. Therefore, the power converter 1
It has been said that 0 should satisfy the function. But,
By incorporating a highly functional, compact and reliable recording device of recent years into the monitoring control device 11, it is possible to integrate the power converter 10 and the state monitoring of the power system. Therefore, the administrator can realize the function by one monitor control device 11 without managing two of the power converter 10 and the power system state monitor device.

(Fifth Embodiment) A power converter monitoring apparatus according to a fifth embodiment of the present invention will be described with reference to FIG. In FIG. 5, 17 is a measuring means for measuring the output of the voltage and current of the power converter 10 and the output of the switching gate pulse signal of the power converter 10, and 18 is the power converter based on the operation command of the power converter 10 and the system condition. It is a prediction means for estimating the output voltage and the current of 10. The monitoring controller 11 includes a comparison / determination unit 21 that compares the output of the measurement unit and the output of the prediction unit to determine whether the power converter 10 or the power system 20 is normal or abnormal.

If the states of the power converter 10 and the power system 20 are normal, the outputs of the measuring means 17 and the predicting means 18 are the same. However, when there is an abnormality in the system conditions of the power converter 10 and the power system 20, a difference occurs in the outputs of the measuring means 17 and the predicting means 18.

The monitoring and control device 11 can detect an abnormality in the power converter 10 or the power system 20 at an early stage by monitoring the difference by the comparing and judging means 21.

(Sixth Embodiment) A power converter monitoring apparatus according to a sixth embodiment of the present invention will be described with reference to FIG. In FIG. 6, reference numeral 11 is a monitoring control device having a function of recording the operating state of the power converter 10 such as operation, stop, and failure, and calculating and processing the recorded data. The monitoring control device 11 has a function of recording a temperature state and an operating time in the power converter 10 and diagnosing a life of the power converter 10 or a replacement time of internal parts from the data.

For example, the life of the capacitor used in the power converter 10 is affected by the ambient temperature and time used, the voltage used and the current flowing in. If the capacitor deteriorates, there is a danger of explosion, etc., so regular replacement is usually performed. However, since the life of the capacitor changes depending on the usage conditions of the device, it is desired to calculate the life of each device. Monitoring and control device 11
By recording the state inside the device as shown above,
Appropriately judge the service life of the equipment or the time to replace internal parts. In addition, the result of the determination can output information on the display 13 or voice so that the user can properly perform maintenance or maintenance work.

(Seventh Embodiment) A power converter monitoring apparatus according to a seventh embodiment of the present invention will be described with reference to FIG. In FIG. 7, 11 is a control and monitoring device provided in the power converter 10, and 19 is a distant distance monitoring means. Further, the control and monitoring device 11 has the functions of the control and monitoring device 11 of the first to sixth embodiments. further,
The control and monitoring device 11 and the remote monitoring means 19 are, for example, LAN (Local Area Network) as communication means.
rk), a telephone line, and a wireless communication path.

The data recorded or processed by the control and monitoring device 11 is sent to the remote monitoring means by the communication means. The remote monitoring means 19 controls the received data by the control monitoring device 11
Similarly to the above, it has a function of providing information to the administrator by display or voice.

In addition, by using a mobile terminal such as a mobile phone,
It is possible to send the data and the moving image measured by the failure detection means 12 of the first embodiment.

As described above, according to this embodiment, it is possible to similarly operate and monitor the function of the monitor control device 11 from a distance.

Further, the control and monitoring device 11 is the power converter 10
The present embodiment can be realized even if the remote monitoring means 19 is provided with the function of the control and monitoring device 11 as well.

In the first to seventh embodiments, the monitor control device 11 is not limited to a specific device, but a PC (personal computer) or PLC (Procedure).
grammable Logic Control
It can also be configured by a general-purpose device such as r). Further, the power converter 10 may be incorporated in the control and monitoring device 11.

Also, the communication means is not a special means but a LAN (Local Area Network).
There is an advantage that it can be realized by using a general technique such as k) or a telephone line.

The present invention also relates to the first to seventh embodiments.
The functions of the above embodiments may be combined and implemented.

[0052]

As is apparent from the above description, according to the power converter monitoring device of the present invention, the states of the power converter and the power system can be automatically diagnosed, so that the device monitoring and maintenance can be performed. It is possible to reduce work work.

Moreover, since the state of the power system can be constantly monitored, no other monitoring device is required, and the problem of the power system can be extracted from the measured information.
It is possible to acquire the data necessary for the solution, and it is possible to introduce the optimum device for the improvement.

[Brief description of drawings]

FIG. 1 is a block diagram showing a configuration of a first embodiment of the present invention.

FIG. 2 is a block diagram showing a configuration of a second exemplary embodiment of the present invention.

FIG. 3 is a block diagram showing a configuration of a third exemplary embodiment of the present invention.

FIG. 4 is a block diagram showing a configuration of a fourth exemplary embodiment of the present invention.

FIG. 5 is a block diagram showing a configuration of a fifth exemplary embodiment of the present invention.

FIG. 6 is a block diagram showing a configuration of a sixth exemplary embodiment of the present invention.

FIG. 7 is a block diagram showing a configuration of a seventh embodiment of the present invention.

FIG. 8 is a block diagram showing a configuration of a conventional example.

[Explanation of symbols]

10 ... Power converter 11 ... Supervisory control device 12 ... Failure detection means 13 ... Indicator 14 ... fan 15 ... Printer 16 ... Control device 17 ... Measuring means 18 ... Prediction means 19 ... Remote monitoring means 20 ... Power system 21 ... Comparison judgment means

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Claims (7)

[Claims] 1. A diagnostic means for diagnosing a faulty part when a failure occurs in the power converter, and an output means for outputting the faulty part diagnosed by this diagnostic means and guide information of a work procedure for restoration. A power converter monitoring device comprising: 2. A conversion means for processing data relating to an operating state or an output state of a power converter and converting it into information of a predetermined format, and an output means for outputting information of a predetermined format obtained by the conversion means. A power converter monitoring device comprising: 3. A calculating means for calculating a power loss during operation of the power converter from data relating to an operating state or an output state of the power converter, and a running of the power converter based on the power loss calculated by the calculating means. An electric power converter monitoring device comprising: a calculation means for calculating the cost; and an output means for outputting the running cost calculated by this means. 4. A measuring means for measuring a voltage and a current of a power system to which a power converter is connected, a calculating means for calculating data on a system state from data measured by the measuring means, and a calculating means for calculating the data. An electric power converter monitoring device comprising a diagnostic means for diagnosing the state of the electric power system from the data regarding the established system state. 5. Measuring means for measuring the output of the power converter,
A predicting unit that predicts an output of the power converter that can be estimated in advance by operating the power converter, compares the output measured by the measuring unit with the output predicted by the predicting unit, and connects the power converter or the power converter. And a diagnosis means for diagnosing the state of the electric power system being operated. 6. A measuring means for measuring the internal condition of the power converter, a recording means for recording the data measured by the measuring means, and a life of the power converter or an internal article of the power converter based on the data recorded by the recording means. A power converter monitoring device, comprising: a determining unit that determines a replacement time. 7. The power converter monitoring device according to claim 1, further comprising communication means for transmitting output data from any one of the means to a location remote from the power converter. A power converter monitoring device characterized in that data transmitted at a location distant from the power converter is processed by a predetermined means.