JP3710442B2 - Circuit breaker control device and control method - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a control device and a control method for a circuit breaker, and more particularly to a control device and a control method for performing switching pole phase control of a high-speed circuit breaker.
[0002]
[Prior art]
[Configuration of prior art]
FIG. 11 shows the prior art described in Japanese Patent Laid-Open No. 2001-135205.
In this power switchgear, the switching control signal is output and the phase is controlled with a waiting time of 1/2 cycle or less after the switching switch command.
As shown in FIG. 11, in this preceding example, control is performed by predicting the time to the target zero of the switching pole based on the voltage between the electrodes immediately before the switching pole command and the time of the zero of the main circuit current. ing.
[0003]
[Problems of the previous example]
In this system, when there is a direct current component or the like in the interelectrode voltage or the main circuit current, the zero point does not come at equal time intervals, so that the prediction is erroneous.
[0004]
[Problems to be solved by the invention]
The present invention is intended to provide a circuit breaker control device and a control method capable of accurately generating an operation signal with relatively small data even when a direct current component is included in an electric quantity waveform in an alternating current system. is there.
[0005]
[Means for Solving the Problems]
In the circuit breaker control device according to the first aspect of the present invention, in the control device for generating an operation signal for operating the circuit breaker according to the operation command, the electrical quantity data of the AC power system to which the circuit breaker is connected is collected. Data collecting means and storage means for holding the data within one cycle before the latest data collected by the data collecting means, and obtaining the amplitude, phase and direct current component from the data held in the storage means Arithmetic processing means for predicting an electric quantity waveform of the AC power system and generating the operation signal based on the predicted waveform is provided.
[0006]
In the circuit breaker control device according to the second aspect of the present invention, in the control device for generating an operation signal for operating the circuit breaker according to the operation command, a predetermined amount of electrical quantity data of the AC power system to which the circuit breaker is connected is specified. Data collecting means for performing sampling operations at periodic intervals to collect sampling data; conversion means for converting analog data collected by the data collecting means into digital data; and collecting data by the data collecting means and converting the digital data to digital data by the converting means Storage means for holding the data within one cycle before the latest converted sampling data, and obtaining the amplitude, phase and direct current component from the digital data held in the storage means to obtain the waveform of the AC power system An arithmetic processing means is provided for predicting and generating the operation signal based on the predicted waveform.
[0007]
In the circuit breaker control device according to a third invention, in the first or second invention, the data collecting means collects a voltage signal when the circuit breaker is in an open state, and the circuit breaker is in a closed state. Sometimes it collects current signals.
[0008]
In the circuit breaker control apparatus according to a fourth aspect of the present invention, in the first or second aspect of the invention, there is provided interrupt means for interrupting the processing operation of the arithmetic processing means and holding the data in the storage means via the arithmetic processing means. It is provided.
[0009]
In a circuit breaker control device according to a fifth aspect of the present invention, in the first or second aspect of the invention, the data is held in the storage means without going through the arithmetic processing means.
[0010]
In the circuit breaker control method according to the sixth aspect of the present invention, when generating an operation signal for operating the circuit breaker according to the operation command, the electrical quantity data of the AC power system to which the circuit breaker is connected is collected and the current time point is collected. And holding the data within one cycle before and determining the amplitude, phase and direct current component from the held data as the data based on the waveform of the fundamental frequency component of the AC power system, The power amount waveform of the system is predicted, and the operation signal is generated based on the predicted waveform.
[0011]
In the circuit breaker control method according to the seventh aspect of the invention, when generating the operation signal for operating the circuit breaker in accordance with the operation command, the electrical quantity data of the AC power system to which the circuit breaker is connected at a predetermined cycle. Sampling data is collected, the data within one cycle before the latest sampling data is retained, and the data is determined based on the waveform of the fundamental frequency component of the AC power system from the retained data. By calculating the minutes, the power amount waveform waveform of the AC power system is predicted, and the operation signal is generated based on the predicted waveform.
[0012]
According to an eighth aspect of the present invention, there is provided a circuit breaker control method according to the sixth or seventh aspect, wherein the alternating current is determined based on a maximum value and a minimum value of the data and a time point when the maximum value and the minimum value of the data are given. The amplitude, phase and direct current component of the electric energy waveform in the electric power system are obtained.
[0013]
DETAILED DESCRIPTION OF THE INVENTION
Embodiment 1 FIG.
A first embodiment of the present invention will be described with reference to FIGS. FIG. 1 is a block diagram showing a configuration in the first embodiment. 2 to 8 are flowcharts showing the operation process in the first embodiment.
[0014]
[Device configuration]
In FIG. 1, 1 is a high-speed circuit breaker, 2 is a high-order relay composed of a power system protection relay that issues an open / close operation command for opening and closing the high-speed circuit breaker 1, and 3 is in response to a switching operation command from the high-order relay 2 And a digital signal processor (DSP) that generates an opening / closing operation signal for opening / closing the high-speed circuit breaker 1.
The control device 3 includes an input / output device (I / O), an analog / digital converter (A / D), an interrupt device (INT), a central processing unit (CPU), and a memory (MEM).
[0015]
[Definition of terms]
Here, the terms used in the following items (1) to (7) are defined.
(1) Time at which interruption is possible: Time at which interruption is possible at the first current zero point after this time.
(2) Breakable time: The time from when the breaker receives the opening signal until the breakable time is reached.
(3) Closing time: The time when the circuit breaker contacts reach a conductive state.
(4) Closing time: The time from when the circuit breaker receives the closing signal until the closing time.
(5) Voltage signal: An analog signal output from a voltage measuring instrument. Corresponds to the detected voltage value.
(6) Current signal: An analog signal output from a current measuring instrument. Corresponds to the detected current value.
(7) Digital data: a digitized voltage signal or current signal.
[0016]
[Outline of the embodiment]
There is a high-speed circuit breaker whose breakable time and closing time indicated as Toc are about Toc = 5 msec.
In the control device that generates an opening signal and a closing signal for the high-speed circuit breaker, the opening signal is transmitted so that the current is zero at or near the time when the break can be performed, and at the same time as the closing time. This is an embodiment relating to a phase control system incorporated in a phase control device that transmits a closing signal so that a voltage or current zero point is in the vicinity thereof.
[0017]
[Operation mode of phase control device]
In the circuit of the digital signal processor (DSP) as shown in FIG. 1, the voltage corresponding to the voltage value and the current value of the power system obtained from the voltage measuring instrument and the current measuring instrument built in or near the high-speed circuit breaker, respectively. Signals and current signals are taken from the DSP input / output (I / O) and sampled at certain time intervals. If the sampled data is analog, it is digitized by an analog / digital converter (A / D).
[0018]
For processing after digitized digital data is prepared, it has a function of interrupting the normal processing in the central processing unit (CPU) by hardware and performing another processing as shown in FIG. An interrupt device (INT) is provided.
This processing is performed by providing a device (DMA) for directly writing numerical data to the memory (MEM) without using the central processing unit (CPU) as in the configuration of the second embodiment shown in FIG. There are cases (described later).
[0019]
In addition, a command signal from an upper switching command device such as a relay device including a power system protection relay is taken in by an input / output device (I / O). For example, when the voltage is HIGH, It decides that it is under execution, and decides that it is waiting when it is LOW.
When changing from LOW to HIGH and from HIGH to LOW, an interrupt device (INT) interrupts the central processing unit (CPU) and executes interrupt processing in the same manner as described above.
[0020]
In addition, the input / output device (I / O) also captures a state signal that notifies the switching pole state of the high-speed circuit breaker. For example, when the voltage is HIGH, it is determined that the terminal is in the open state. It is determined that the contact is closed when LOW.
When changing from LOW to HIGH and from HIGH to LOW, an interrupt device (INT) interrupts the central processing unit (CPU) and executes interrupt processing in the same manner as described above.
[0021]
A program indicating a control method performed by the central processing unit (CPU) is stored in a memory (MEM) in advance, and is not rewritten unless there is a special method and reason such as program change.
On the other hand, the captured data is also stored in a memory (MEM) and rewritten as necessary. The program memory and data memory may be the same, or separate dedicated memory may be used.
[0022]
[Control action when interrupting by sampling]
A control operation in the first embodiment will be described.
As shown in FIG. 2, when the control of the phase control device is started, the central processing unit (CPU) firstly stores a zero point detection presence / absence storage region (Zero storage region), an opening / closing command presence / absence storage region (memory) on the memory (MEM). And the three variables Zero, Com, and State reserved in the circuit breaker state storage area (State storage area).
The zero detection presence / absence storage area (Zero storage area) provided in the memory (MEM) sets 1 as a variable Zero when a zero is detected by a zero prediction process described later, and sets the variable Zero to 0 in other cases. To do.
Similarly, the open / close command presence / absence storage area (Com storage area) is set to 1 as a variable Com when there is an open / close operation command from the upper relay 2, and to 0 in other cases.
Similarly, the circuit breaker state storage area (State storage area) is for setting the variable State in accordance with the open or closed state of the circuit breaker 1.
By executing the initialization operation, Zero and Com each set an initial value to 0. State is set to 0 when the state signal of the circuit breaker is HIGH (open state), and is set to 1 when the state signal is LOW (closed state).
The elements of the data array shown below and variables such as OldEst held in a predicted value storage area (OldEst storage area) for storing the predicted value of the waveform obtained in the previous interrupt process are also initialized to zero.
[0023]
When the initialization is completed, a steady process described below is started.
The central processing unit (CPU) reads the value of the variable Zero from the memory (MEM) and examines it. When the value is 0, the value of the variable Zero is read again without executing anything. When the variable Zero is 1, the value of the variable Com is checked.
When the value of Com is 0, nothing is executed and the process returns to the variable Zero reading process. When the value of Com is 1, the value of the variable State is further examined.
When the value of State is 0, an instruction is issued to output a closing signal to the input / output unit (I / O), and when the value of State is 1, an instruction is issued to output an opening signal.
When the instruction process is completed, the process returns to the variable Zero reading process.
[0024]
Next, three interrupt processes will be described.
First, when the state signal for notifying the open / close pole state of the high-speed circuit breaker 1 changes and the interrupt device (INT) issues an interrupt, the central processing unit (CPU) performs the following processing as shown in FIG.
The variable State is set to 0 when the state signal becomes HIGH (open state), and is set to 1 when the state signal becomes LOW (closed state).
When this process ends, the process returns to the steady process.
[0025]
Next, the central processing unit (CPU) performs the following processing as shown in FIG. 4 when the interrupting device (INT) issues an interrupt by receiving an opening or closing command signal from the host.
The variable Com is set to 1 when the command signal becomes HIGH (execution), and is set to 0 when the command signal becomes LOW (standby).
When this process ends, the process returns to the steady process.
[0026]
Before describing the third interrupt process, an array for storing data will be described.
There is an area secured as an array on the memory (MEM). The name of this array is a data array.
When N is a positive integer, N + 1 data arrays are prepared. That is, N + 1 areas are secured in order on the corresponding memory.
The elements of the array can be referred to by array numbers from 0 to N. The value of N is 64 in this embodiment, but at least 32 is required. The array elements are all set to zero by default.
When the fundamental frequency of the electric power system is f (f is 50 Hz or 60 Hz) and the period is T = 1 / f, the input / output unit (I / O) at a constant time interval such that the sampling period is Ts = T / N. ).
The current signal and voltage signal input from the high-speed circuit breaker 1 are sampled. When the variable State is 0 (open state), the voltage signal is sampled. When the State is 1 (closed state), the current signal is sampled. Thus, the input / output unit (I / O) has a function of making input data.
[0027]
When sampling is performed, the interrupt device (INT) interrupts the normal processing of the central processing unit (CPU). Thereby, the central processing unit (CPU) executes the following interrupt processing as shown in FIG.
The i-th element of the data array is transferred to the (i-1) -th (i increases by 1 from 1 to N). The newly obtained input data is transferred to the Nth data array.
[0028]
Thereafter, the central processing unit (CPU) executes a zero point prediction process as shown in FIG. 6 from a series of data stored in the data array.
Data in the data array is interpreted as representing the waveform of the fundamental frequency f of the power system, and the amplitude, phase, and DC component are obtained by calculation.
What is required in this control device is the time of the zero point, but even if the actual waveform has harmonic components, the time of the zero point of those harmonic components is the same as the time of the zero point of the fundamental frequency component. There is no need to find the zero of the wave component.
[0029]
The calculation method for obtaining the amplitude A, the phase angle θ, and the DC component B of the fundamental frequency component may use a fast Fourier transform (FFT), but may be obtained by the following simple method shown in FIGS. There is also.
7 and 8 are flowcharts showing a calculation method for simply obtaining the amplitude A, the phase angle θ, and the DC component B of the fundamental frequency component, and after performing the flow process shown in FIG. 8 is continued from the step output {circle around (1)} shown in FIG. 8 to the step input {circle around (1)} shown in FIG.
[0030]
The maximum value max and the minimum value min and the array element numbers imax and imin that give the values of all the data array elements are obtained. When there are a plurality of array elements giving the maximum value, the largest array element number is imax. The same applies to imin.
[0031]
The amplitude A is obtained by (max + min) / 2, and the direct current component B is obtained by (max−min) / 2.
Regarding the phase, first, the larger of imax and imin is selected and set as id. However, when imax is 0 or N and imin is neither 0 nor N, id = imin, and when imin is 0 or N and imax is neither 0 nor N, id = imax. If none of these conditions is satisfied, id = 0. When id = imax, the phase angle θ is θ = (id−N) × 2π / N + π / 2, and when id = imin, θ = (id−N) × 2π / N + 3π / 2.
[0032]
From the obtained amplitude A, phase angle θ, and DC component B, as shown in FIG. 6, the predicted value Est of the waveform after time Toc (5 msec) is obtained as Est = A × sin (2πf × Toc + θ) + B.
If Est = 0, or if the sign is different from the predicted value OldEst of the waveform obtained during the previous interrupt processing, 1 is substituted into the variable Zero, otherwise 0 is substituted.
Thereafter, Est is substituted for OldEst, the interrupt process is terminated, and the process returns to the normal process.
[0033]
It is necessary to set an upper limit for the value of N related to the sampling period Ts. When the time Tc required by the interrupt processing becomes a value larger than Ts, the processing is not efficiently performed. Therefore, it is preferable that Tc ≦ Ts, that is, N ≦ T / Tc.
[0034]
Thus, based on the predicted value Est of the waveform after the breakable time or opening time Toc (5 msec), it is detected that the waveform is at or near the zero point after the breakable time or opening time Toc (5 msec). Then, the variable Zero stored in the zero point detection presence / absence storage area (Zero storage area) in the memory (MEM) is set to 1, and as described above with reference to FIG.
[0035]
In the above embodiment, processing is performed using the same phase control device at the time of charging and at the time of opening, but separate control devices may be used.
When the zero point prediction is performed, first, a filtering process for removing high frequency components may be performed.
[0036]
According to the first embodiment of the present invention, in the control device 3 composed of a digital signal processor (DSP) that generates an operation signal for operating the high-speed circuit breaker 1 according to the operation command, the high-speed circuit breaker 1 is connected. Data collecting means comprising an input / output device (I / O) for sampling electric data with respect to voltage or current of the AC power system and collecting sampling data at a predetermined cycle; The data collecting means consisting of analog / digital converter (A / D) for converting the analog data collected by the data collecting means consisting of data) into the digital data, and the data collecting means consisting of the input / output device (I / O). The latest sampler converted into digital data by the conversion means comprising the analog / digital converter (A / D). Storage means comprising a memory (MEM) for holding the data within one cycle before the data, and obtaining the amplitude, phase and DC component from the digital data held in the storage means comprising the memory (MEM) An arithmetic processing unit comprising a central processing unit (CPU) for predicting an electric quantity waveform of an AC power system and generating the operation signal based on the predicted waveform is provided, and a data collecting unit comprising the input / output unit (I / O) Collects a voltage signal when the circuit breaker is in the open state, collects a current signal when the circuit breaker is in the closed state, and performs processing operations of the arithmetic processing means comprising the central processing unit (CPU). Interrupt device for interrupting and holding the data in the memory means comprising the memory (MEM) via the arithmetic processing means comprising the central processing unit (CPU) INT) interrupt means is provided, so that even when the electric quantity waveform in the AC current system contains a DC component, an operation signal can be generated accurately with a relatively small amount of data, and the circuit breaker is opened. A voltage signal is collected when in a state, and a current signal is collected when the circuit breaker is in a closed state to appropriately collect data and control the circuit breaker to hold the data in the storage means by an interrupt operation. An apparatus can be provided.
[0037]
Further, according to the first embodiment of the present invention, when generating the operation signal for operating the circuit breaker according to the operation command, the electric quantity data of the AC power system to which the circuit breaker is connected is determined at a predetermined cycle. Sampling data is collected, the data within one cycle before the latest sampling data is retained, and the data is determined based on the waveform of the fundamental frequency component of the AC power system from the retained data. By calculating the minutes, the power waveform of the AC power system is predicted and the operation signal is generated based on the predicted waveform, and the maximum and minimum values of the data and the maximum and minimum values of the data are given. The amplitude, phase and direct current component of the waveform in the alternating current power system are A circuit breaker control method capable of generating an operation signal accurately and quickly by simply processing a relatively small amount of data collected by a sampling operation even when the electric quantity waveform in the circuit includes a direct current component. be able to.
[0038]
Embodiment 2. FIG.
An embodiment according to the present invention will be described with reference to FIGS. FIG. 9 is a block diagram showing a configuration in the second embodiment. FIG. 10 is a flowchart showing an operation process in the second embodiment.
In the second embodiment, the configuration and method content other than the specific configuration and method content described here have the same configuration and method content as the configuration and method in the first embodiment described above. It has the effect of.
[0039]
[Device configuration]
In FIG. 9, 1 is a high-speed circuit breaker, 2 is an upper relay composed of a power system protection relay that issues an opening / closing operation command for opening and closing the high-speed circuit breaker 1, and 3 is in response to an opening / closing operation command from the upper relay 2 And a digital signal processor (DSP) that generates an opening / closing operation signal for opening / closing the high-speed circuit breaker 1.
The control device 3 includes an input / output device (I / O), an analog / digital converter (A / D), a memory transfer device (DMA), a memory (MEM), and a central processing unit (CPU).
[0040]
[Control action when numerical data is directly written to memory]
A control operation in the second embodiment will be described.
As shown in FIG. 10, when the control of the phase control device is started, the central processing unit (CPU) first performs initialization on the three variables Zero, Com, and State secured in the memory.
Zero and Com set initial values to 0, respectively. State is set to 0 when the state signal of the circuit breaker is HIGH (open state), and is set to 1 when the state signal is LOW (closed state). Data array elements and variables such as OldEst are also initialized to zero.
[0041]
When the initialization is completed, a steady process described below is started.
The central processing unit (CPU) reads the value of the variable Zero from the memory (MEM) and examines it. When the value is 0, the value of the variable Zero is read again without executing anything.
When the variable Zero is 1, the value of the variable Com is checked. When the value of Com is 0, the prediction process is executed, and the process returns to the variable Zero reading process.
When the value of Com is 1, the value of the variable State is further examined. When the State value is 0, an instruction is issued to output a closing signal to the I / O, and when the State value is 1, an instruction is issued to output an opening signal.
When the instruction process is completed, the prediction process is executed, and the process returns to the variable Zero reading process.
[0042]
When the state signal for reporting the switching pole state of the high-speed circuit breaker 1 changes, the memory transfer device (DMA) performs the following processing.
The variable State is set to 0 when the state signal becomes HIGH (open state), and is set to 1 when the state signal becomes LOW (closed state).
[0043]
Next, the memory transfer device (DMA) performs the following processing upon receipt of an opening or closing command signal from the host.
The variable Com is set to 1 when the command signal becomes HIGH (execution), and is set to 0 when the command signal becomes LOW (standby).
When the current signal and the voltage signal are sampled and input data is obtained, the memory transfer device (DMA) performs the following processing.
The first to Nth elements of the data array are transferred from the 0th to the (N-1) th (the number is decreased by one). The newly obtained input data is transferred to the Nth data array.
[0044]
According to the second embodiment of the present invention, in the control device 3 composed of a digital signal processor (DSP) that generates an operation signal for operating the high-speed circuit breaker 1 according to the operation command, the high-speed circuit breaker 1 is connected. Data collecting means comprising an input / output device (I / O) for sampling electric data with respect to voltage or current of the AC power system and collecting sampling data at a predetermined cycle; and the input / output device (I / O) The data collecting means consisting of analog / digital converter (A / D) for converting the analog data collected by the data collecting means consisting of data) into the digital data, and the data collecting means consisting of the input / output device (I / O). The latest sampler converted into digital data by the conversion means comprising the analog / digital converter (A / D). Storage means comprising a memory (MEM) for holding the data within one cycle before the data, and obtaining the amplitude, phase and DC component from the digital data held in the storage means comprising the memory (MEM) An arithmetic processing unit comprising a central processing unit (CPU) for predicting an electric quantity waveform of an AC power system and generating the operation signal based on the predicted waveform is provided, and a data collecting unit comprising the input / output unit (I / O) Collects a voltage signal when the circuit breaker is in an open state, collects a current signal when the circuit breaker is in a closed state, and stores arithmetic processing means comprising the central processing unit (CPU). Since it is held in the memory means consisting of the memory (MEM) without going through, the direct current component is included in the electric quantity waveform in the alternating current system Relatively small amounts together with to produce an appropriately operating signal by the data, the data can be provided a control device for a circuit breaker capable of holding the without storing means passing through the processing means.
[0045]
The objects of the embodiment according to the present invention described above can be summarized as follows.
Even if the DC voltage is included in the interelectrode voltage or current, the target zero point time is predicted relatively correctly, the phase of the switching pole of the high-speed circuit breaker is controlled, and the switching pole is completed within one cycle from the command. To do.
[0046]
The technical contents of the embodiment according to the present invention are as follows.
(1) The waveform of the fundamental frequency component (50 Hz or 60 Hz) of the power system was predicted.
(2) In order to obtain a zero predicted waveform, the waveform was predicted by obtaining the amplitude, phase, and DC component from the sampling data within one cycle before the current time.
(3) A simple method for obtaining the amplitude, phase, and DC component was used.
(4) Waiting for an opening command from the host while predicting and calculating the zero point every hour using a digital signal processor.
(5) When performing zero point prediction for each sampling and when performing zero point prediction at every calculation cycle.
(6) The sampling period is the same as or longer than the calculation time of the predicted waveform.
Although (1) to (3) sacrifice the prediction accuracy to some extent, high-speed calculation becomes possible. It is possible to shut off within one cycle after the accident occurs.
When the data of one cycle or earlier is used in (2), an effect of smoothing out the direct current generated when an accident occurs is produced.
[0047]
The embodiment according to the present invention has the following configuration contents.
In a control device that generates an opening signal and a closing signal for a high-speed circuit breaker, an opening signal is transmitted so that the current becomes zero at or near the breakable time, and at or near the closing time. In the phase control device and the phase control method for transmitting the closing signal so that the voltage or current zero point is in the vicinity,
(1) A phase control method characterized in that sampling data is predicted on the assumption that it is a waveform of a fundamental frequency component of a power system.
(2) A phase control method for predicting a zero point by predicting a waveform by obtaining an amplitude, a phase, and a direct current component from sampling data within one cycle before the current time.
(3) A phase control method characterized by using a simple method for obtaining the amplitude, phase, and DC component from the time at which the maximum and minimum values of sampling data are given and the time at which each is given.
[0048]
According to such a configuration in the embodiment of the present invention, the following effects can be obtained.
(1) Even when the current / voltage has a direct current component, it can be predicted correctly.
(2) The switching pole can be completed within one cycle after the accident.
(3) Since it is only necessary to have data within one cycle, less memory is required.
(4) Since the fundamental frequency component is predicted, the algorithm becomes simple and high-speed calculation can be performed.
(5) In the prediction calculation by the simple method, the calculation speed is improved and the calculation time is shorter than that of using FFT.
[0049]
【The invention's effect】
According to the first aspect of the present invention, it is possible to obtain a circuit breaker control apparatus that can accurately generate an operation signal with a relatively small amount of data even when a direct current component is included in an electric quantity waveform in an alternating current system. .
[0050]
According to the second invention, the control of the circuit breaker that can accurately generate the operation signal from the relatively small amount of data collected by the sampling operation even when the electric quantity waveform in the AC current system includes a DC component. A device can be obtained.
[0051]
According to the third aspect of the invention, even when the electric quantity waveform in the alternating current system includes a direct current component, the operation signal can be accurately generated with a relatively small amount of data, and the breaker is in the open state. Collects a voltage signal and collects a current signal when the circuit breaker is in a closed state, thereby providing a circuit breaker control device capable of appropriately collecting data.
[0052]
According to the fourth aspect of the invention, even when the electric quantity waveform in the alternating current system includes a direct current component, the operation signal can be accurately generated with a relatively small amount of data, and the data is stored in the interrupt operation. A circuit breaker control device that can be held by the means can be provided.
[0053]
According to the fifth aspect of the invention, even when the electric quantity waveform in the alternating current system includes a direct current component, the operation signal can be accurately generated with a relatively small amount of data, and the data is passed through the arithmetic processing means. It is possible to provide a circuit breaker control device that can be held in the storage means without any trouble.
[0054]
According to the sixth invention, it is possible to obtain a circuit breaker control method capable of accurately generating an operation signal by a relatively small amount of data processing even when a direct current component is included in an electric quantity waveform in an alternating current system. it can.
[0055]
According to the seventh invention, the circuit breaker capable of accurately generating an operation signal by processing a relatively small amount of data collected by the sampling operation even when the electric quantity waveform in the AC current system includes a DC component. A control method can be obtained.
[0056]
According to the eighth aspect of the present invention, a circuit breaker capable of processing a relatively small amount of data easily and generating an operation signal accurately and quickly even when the electric quantity waveform in the AC current system includes a DC component. The control method can be obtained.
[Brief description of the drawings]
FIG. 1 is a block diagram showing a configuration according to a first embodiment of the present invention.
FIG. 2 is a flowchart showing an open / close signal output operation process in the first embodiment according to the present invention;
FIG. 3 is a flowchart showing a state signal detection operation process in the first embodiment according to the present invention.
FIG. 4 is a flowchart showing a command signal detection operation process in the first embodiment according to the present invention.
FIG. 5 is a flowchart showing an interrupt processing operation process in the first embodiment according to the present invention;
FIG. 6 is a flowchart showing a zero point prediction processing operation process in the first embodiment according to the present invention.
FIG. 7 is a first half of a flowchart showing a calculation processing operation process of amplitude A, DC component B, and phase angle θ in the first embodiment according to the present invention;
FIG. 8 is the latter half of the flowchart showing the calculation processing operation process of the amplitude A, DC component B, and phase angle θ in the first embodiment according to the present invention.
FIG. 9 is a block diagram showing a configuration according to a second embodiment of the present invention.
FIG. 10 is a flowchart showing an open / close signal output operation process in the second embodiment according to the present invention;
FIG. 11 is a block diagram showing a configuration in the prior art.
[Explanation of symbols]
1 High-speed circuit breaker, 2 upper relay, 3 control device, I / O input / output device, A / D analog / digital converter, INT interrupt device, DMA memory transfer device, CPU central processing unit, MEM memory.

Claims (8)

In a control device that generates an operation signal for operating a circuit breaker according to an operation command, data collecting means for collecting electric quantity data of an AC power system to which the circuit breaker is connected, and data collected by the data collecting means Storage means for holding the data within one cycle before the latest data, and predicting the electric quantity waveform of the AC power system by obtaining the amplitude, phase and DC component from the data held in the storage means A circuit breaker control apparatus comprising arithmetic processing means for generating the operation signal based on Data collection that collects sampling data by performing sampling operation at a predetermined period for the electrical quantity data of the AC power system to which the circuit breaker is connected in a control device that generates an operation signal for operating the circuit breaker according to the operation command Means, conversion means for converting the analog data collected by the data collection means to digital data, and latest sampling data collected by the data collection means and converted to digital data by the conversion means within one cycle before Storage means for holding the data, obtaining amplitude, phase and direct current component from the digital data held in the storage means, predicting the waveform of the AC power system, and generating the operation signal based on the predicted waveform A circuit breaker control device comprising an arithmetic processing means. 3. The data collection unit according to claim 1, wherein the data collection unit collects a voltage signal when the circuit breaker is in an open state, and collects a current signal when the circuit breaker is in a closed state. Circuit breaker control device. 3. The circuit breaker control device according to claim 1, further comprising interrupt means for interrupting a processing operation of the arithmetic processing means and holding the data in the storage means via the arithmetic processing means. . 3. The circuit breaker control device according to claim 1, wherein the data is held in the storage means without going through the arithmetic processing means. In generating an operation signal for operating the circuit breaker according to the operation command, collecting the electric quantity data of the AC power system to which the circuit breaker is connected and holding the data within one cycle before the current time point, The data is based on the waveform of the fundamental frequency component of the AC power system, and the amplitude, phase, and DC component are obtained from the retained data, thereby predicting the power amount waveform of the AC power system and based on the predicted waveform. A circuit breaker control method characterized by generating an operation signal. When generating an operation signal for operating the circuit breaker according to the operation command, the sampling data is collected at a predetermined cycle for the electric quantity data of the AC power system to which the circuit breaker is connected, and one cycle before the latest sampling data. And the amount of electric power of the AC power system by obtaining the amplitude, phase and DC component from the stored data as the data based on the waveform of the fundamental frequency component of the AC power system A circuit breaker control method characterized by predicting a waveform and generating the operation signal based on the predicted waveform. The amplitude, phase, and direct current component of an electric energy waveform in the AC power system are obtained from a maximum value and minimum value of the data and a point in time when the maximum value and minimum value of the data are given. The control method of the circuit breaker of Claim 6 or Claim 7.

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