JP2008118781A - Reset circuit, protection relay apparatus, and method for resetting protection relay apparatus - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a reset circuit for a protection relay apparatus, which can swiftly recover a protection system by inputting an interlock condition such as a fault state or the like of the protection relay apparatus at fault to perform an effective reset control, while monitoring the digital protective relay apparatus from a power system monitor control center, thereby restoring the apparatus from a transitory fault, and to provide a protection relay apparatus and a method for resetting the protection relay apparatus. <P>SOLUTION: The protection relay apparatus can execute a cold start for resetting the whole device by feeding or stopping power supply and a hot start for resetting with an external contact point a part of a calculating section constituted of a micro-processor or the like. The protection relay apparatus is externally provided with a first resetting means for executing the hot start and a second resetting means for executing the cold start of the protection relay apparatus by the reset control signal from a remote monitor control device or the like and the condition of the signal of the use state and the fault state of the protection relay apparatus. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a reset circuit for a protective relay device that attempts to recover by restarting from a distance when the digital protective relay device is stopped due to a transient failure, and a protective relay equipped with this function. The present invention relates to an electric device and a reset method.

  2. Description of the Related Art Conventionally, when an operation failure occurs in an electronic device or the like, a technique for activating and restoring the power supply of the device by communication via a telephone line or the like has been proposed. For example, Patent Document 1 includes power control means for activating a power source with an external signal in an electronic device or the like, and remotely monitors whether the monitored device such as the electronic device is normal or not, and troubles the device. At the time, a technology of a power remote control system has been proposed in which the power of the electronic device in failure is activated by power control means from a center terminal via a telephone line.

  By the way, the operation of activating the power supply operates whenever the monitoring target device is operated at the center regardless of whether the monitoring target device is normal or abnormal.

However, in an important device such as a protective relay device in the power system field, the power supply is easily killed when the device is in operation, and the protection function of the power equipment that the device carries is temporarily stopped. That is very problematic. In addition, when the power source of the apparatus is killed, the stop time of the apparatus generally becomes long, and there is a problem as an important protection system.
JP 2005-204454 A

  The present invention has been made in view of the above-described circumstances, and monitors a digital type protective relay device from a power system monitoring control station, and includes an interlock condition such as a failure state of the protective relay device at the time of failure. , Reset circuit for protective relay device, protective relay device and protective relay device can be recovered quickly by recovering transient failure by effective reset control It aims to provide a method.

  In order to achieve the above object, a reset circuit according to the present invention includes a cold start means for resetting the entire apparatus due to power activation, a hot start means for resetting a part or all of a calculation unit including a microprocessor, and the like. A reset signal input means for inputting an external reset request signal, and a reset mode selection means for selecting which one of the cold start means and the hot start means to execute according to the condition of use or failure of the apparatus. When the reset request signal is input, the cold start unit or the hot start unit is operated according to the selection of the reset mode selection unit.

  In the present invention, when the protective relay device or the power monitoring control device fails, a part of the device including the calculation unit is determined by the remote reset signal from the monitoring control station via the remote monitoring control device according to the condition of the failure content. A temporary failure of an important protective relay device can be recovered by resetting (hot start) or resetting the entire device (cold start) by activating the power supply or the like.

  The reset circuit or reset device or reset process according to the invention includes a reset signal from the remote monitoring control device to the protective relay device, a signal indicating that the protective relay device is not being used, and a serious failure signal detected by continuous monitoring. And a hot start means for outputting under the condition that the check relay is not defective and the operation unit of the protective relay device is not faulty, and if a serious fault does not recover even after one minute after the hot start output, for example, a cold start Means for temporarily storing the output of the hot start means, timer means that is turned on after one minute from the output, and AND means of the output of the timer means and the signal of the serious failure. And a second timer means for turning on the output for a certain period of time and the primary storage means with the output. A reset signal from the remote monitoring and control device, a signal indicating that the protective relay device is not being used, a serious failure signal detected by constant monitoring, and a check failure. A second cold start signal that is output according to a failure condition of the arithmetic unit of the relay device, and a cold start output means that is an OR of the first cold start signal.

  In the present invention, when the digital protective relay device is in a serious failure, and when the device is not in use automatically due to the occurrence of a serious failure, and is not in a poor state of inspection after automatic inspection, When the cause is the failure of the arithmetic unit composed of the microprocessor that is the main part of the protective relay device, when a general 1-second reset signal is input from the remote monitoring control device, the entire device is immediately reset. The first reset is performed by using the second reset means to perform a cold start due to the activation of the power source of the computer, and in the event of a serious failure other than the failure of the arithmetic unit, only the arithmetic unit is reset and the program operation is restarted. The reset means is operated. If a serious failure is not recovered by this operation, the cold start is performed 1 minute later, and the entire apparatus is restarted.

  Further, the protective relay device according to the present invention is a protective relay device provided with the reset circuit described above, and the reset mode selection means does not use the device whose use state prohibits an output command to the circuit breaker. When in the middle state, an input of a reset request signal from a distance is received.

  In the present invention, when the apparatus is in use, it is prevented from receiving a reset request signal from a distance, thereby preventing unnecessary signals from being output at the time of resetting. In addition, the use / non-use of the device can be set from a distance, and when sending a reset request signal, the device non-use is set in advance from a distance, and after confirming the status, a reset request signal is sent. You may make it transmit.

  The protective relay device according to the present invention is a protective relay device including the reset circuit described above, and the reset mode selection means is set when the recovery is not performed by a predetermined number of self-resets by self-diagnosis of the device. In the case of a major fault condition, when a reset request signal is received from a distance and the hot start means is activated, a cold start is performed if the major fault does not recover after a predetermined time has elapsed after the means is activated. The means is operated.

  In the present invention, the reset at the time of a device failure is based on the reset operation (self-reset) of the device itself, and if it is not completely recovered even by the self-reset, it is regarded as a serious failure state. In this case, the function such as degenerate operation is limited. The operation is performed in the above-described mode, and an unnecessary reset operation from a distant place is prohibited by accepting a reset from a distant place only in this state.

  Further, a protection relay device reset method according to the present invention is a reset method in a protection relay device including the reset circuit and the like, and is a remote monitoring for monitoring and controlling the state of an electric station including the protection relay device When the failure of the protective relay device is confirmed at the monitoring control station via the control device, the protective relay device is reset via the remote monitoring control device, and the reset circuit includes the remote monitoring control device from the remote monitoring control device. The protection relay device is hot-started according to the condition that the state signal from the protection relay device is not in a major fault, non-use, or inspection failure, so that the arithmetic relay unit is not faulty. If the serious failure has not been recovered later, the protective relay device is cold-started. In addition, the reset signal from the remote monitoring and control device can be used to cold start the protection relay device according to the condition that the arithmetic unit is faulty unless the status signal from the protection relay device is in a serious failure, non-use, or inspection failure. It is characterized by making it.

  According to the present invention, at the time of failure of the digital type protective relay device, it is possible to reset the device by a remote operation from the control station monitoring it, and the reset is made effective and used. By resetting part or all of the device according to the status and cause of failure, it is possible to quickly and appropriately restore the stop state at the time of transient failure of the protective relay device, and the protection system down time Can be shortened.

  Embodiments of the present invention will be described below with reference to FIGS. FIG. 1 is a system configuration diagram relating to the reset function of the protective relay device according to the first embodiment, FIG. 2 is a logic circuit diagram of the reset circuit therein, and FIG. 4 is a process of the same reset function. FIG.

  In the system configuration diagram of FIG. 1, a control station 1 that monitors and controls equipment at an electric station and an electric station 2 that is monitored and controlled are connected by a remote monitoring control device 3 or a corresponding line through a communication line. The control station 1 is composed of a computer having a supervisory control console composed of a personal computer or the like. The electrical station 2 has a protective relay between a remote monitoring and control device (hereinafter abbreviated as TC) 3 that performs transmission with the computer and a protective relay device (hereinafter abbreviated as RY) 4 that is monitored and controlled by this device. A reset circuit 5 is provided for restarting the device. The reset circuit 5 includes hot start means for resetting the arithmetic unit of the microprocessor of the RY4 and cold start means for resetting the entire apparatus by activating the power source or the like.

  FIG. 2 is a detailed logic circuit diagram of the reset circuit 5. AND logic 51 that ANDs the reset signal R0 from TC3, the serious failure signal S1 of RY4, the RY non-use signal S2, and the signal S3 that is not inspected, and its output and a signal that is not in failure of the arithmetic unit (CPU) failure S4 The output of the AND 52 is the hot start signal R1, the set input of the flip-flop 53 that primarily stores this output, and the timer 54 is connected to the output of 53, and the output of the AND 55 of this output and the serious fault S1 is the second. The timer 56 and the OR 58 are input. The output of the second timer 56 is connected to the reset input of the flip-flop 53. The output of the AND 51 and the output of the AND 57 of the arithmetic unit failure S4 are input to the OR 58. The output of the OR 58 is used as a cold start signal R2. The hot start signal R1 is connected to a hot start input of RY4, and the call start signal R2 is connected to a relay 59 or the like, and the power supply to RY4 is temporarily activated by the contact of this relay to RY4. Connected.

  Next, the operation of the reset circuit 5 of the protective relay device having the above-described configuration will be described with reference to FIG. 2 and the operation flowchart of FIG. The reset signal R0 to RY4 input from the control center 1 via TC3 is a serious failure in-progress signal S1 (S102) by AND51 and 52, and RY is automatically unused due to occurrence of a serious failure. When the signal S2 (S104) and the signal S3 that is not inspected poorly (S103) and when the arithmetic unit is not malfunctioning (S105), the hot start signal R1 is output (S106). Then, this output R1 is stored in the flip-flop 53 (S106), and after the timer is turned on (1 minute later) after the hot start signal R1 is output by the timer 54 (S107), if the serious failure does not return (S108), AND55 and OR58 The cold start signal R2 is output via (step S109).

  Further, when the AND 51 and 57 are used, the serious failure signal S1 (S102) indicates that the RY is not in use automatically due to the occurrence of a serious failure, the non-use signal S2 (S104), and the signal S3 that is not in check failure. In (S103), when the arithmetic unit is malfunctioning (S105), the cold start signal R2 is immediately output via the OR 58 (S109).

The hot start signal R1 resets only the arithmetic unit of RY4, and the cold start signal R2 is generally connected to a relay 59 that activates the power supply to RY4, and the entire RY4 is reset.
FIG. 3 shows the operation shown in FIG. 2 or 4 realized by a relay sequence.

  Here, the reset mode selection means 61 includes a major failure contact 62 that is closed when the device is faulty (major failure), a device non-use contact 63 that is closed when the device is stopped (not used), and an inspection state that is open when the inspection is defective. A contact 64 and a CPU failure contact 65 that is closed during a CPU failure are connected to the series, and when all of these contacts are closed, an external device reset signal (reset request signal) is input to input the relay Ry1. The hot start control circuit 81 configured to operate is the same in the conditions of the contacts 62 to 64 and the relay Ry2 is configured to operate according to the condition of the contact 66 that is closed when the CPU is not in failure. A start control circuit 82 is provided. When the relay Ry1 is operated, the contact 67 (hot start means) is operated and the arithmetic circuit 91 is reset.

  Further, when the relay Ry2 is operated, the contact 68 (cold start means) is operated, and the power supply system of the device is killed so that the entire device is reset.

  Further, when the relay Ry1 operates, the contact 71 is closed and the timer TM1 is started. When a predetermined time (for example, 1 minute) elapses, the contact 72 is closed, and the relay Ry2 of the cold start control circuit 82 operates according to the condition of the contact 73 that is closed when the device failure continues. When the relay Ry2 is operated, the output is held for a predetermined time by the timer TM2.

The device use / non-use control circuit 92 outputs a non-use state due to an external device non-use control command or a serious failure, and outputs a use state according to an external device use control command. A command to an external circuit breaker is output via the output contact 74 of the device use / non-use control circuit 92. When not in use, a command is issued to the circuit breaker by opening this contact 74. There is no such thing. Further, the contact 63 operates by the output of the device use / non-use control circuit 92, and accepts an external reset signal only when the device is not in use.
The operation in the above configuration is the same as that in FIGS.

  As described above, according to the present embodiment, when a digital protective relay device fails, the reset is enabled when the device can be reset by a remote operation from a control station that monitors the failure. By resetting part or all of the device according to the cause of the failure, it becomes possible to quickly recover from the stop state at the time of transient failure of the protective relay device, and shorten the stop time of the protection system It becomes possible. Further, it is possible to lock unnecessary reset operation when the protective relay device is healthy.

  INDUSTRIAL APPLICABILITY The present invention can be used for a failure recovery operation of a digital electronic device including a protective relay device and other microprocessors in a power system.

1 is a system configuration diagram according to a first embodiment of the present invention. FIG. 2 is a logic circuit diagram of the reset circuit of FIG. 1. FIG. 2 is a relay circuit diagram of the reset circuit of FIG. 1. It is a flowchart for demonstrating the procedure of the reset method by the 1st Embodiment of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Control station 2 Electricity station 3 Remote monitoring control apparatus 4 Protection relay apparatus 5 Reset circuit 51,52,55,57 AND logic 53 Flip-flop 54,56 Timer 58 OR logic 59 Power activation relay 61 Reset mode selection means 62-68 , 71 to 74 Relay contact 81 Hot start control circuit 82 Cold start control circuit 91 Relay input / output arithmetic circuit 92 Device use / non-use control circuit 93 Power supply R0, 1, 2 Reset signal S1, 2, 3, 4 Protection relay Device status signal

Claims (5)

A cold start means for resetting the entire device by power activation,
Hot start means for resetting part or all of the arithmetic unit composed of a microprocessor and the like;
A reset signal input means for inputting an external reset request signal;
A reset mode selection means for selecting which one of the cold start means and the hot start means to execute depending on the condition of use or failure state of the device;
When the reset request signal is input, the reset circuit operates the cold start unit or the hot start unit according to the selection of the reset mode selection unit. Timer means to be started by the operation of the hot start means,
The reset mode selection means, when the failure state does not include a failure of the arithmetic unit, select the hot start means,
2. A reset circuit according to claim 1, wherein if the timer means does not recover all or part of the failure state even after a predetermined time has elapsed after the operation of the hot start means, the cold start means is operated.   3. The protective relay device comprising the reset circuit according to claim 1 or 2, wherein the reset mode selection means is in a state in which the device is not in use so as to prohibit the output command to the circuit breaker. A protective relay device that receives an input of a reset request signal from a distance.   The protective relay device comprising the reset circuit according to claim 2, wherein the reset mode selection means is in a serious failure state that is set when it does not recover by a predetermined number of self-resets by self-diagnosis of the device. When a reset request signal is received from a remote place and the hot start means is activated, the cold start means is operated if the serious failure is not recovered even after a predetermined time has elapsed after the activation of the means. Protective relay device. A method for resetting a protective relay device comprising the reset circuit according to claim 1,
Detecting a failure of the protective relay device at a monitoring control station via a remote monitoring control device that monitors and controls the state of the electric station including the protective relay device;
Transmitting a reset request signal of the protective relay device via a remote monitoring control device upon detection of the failure;
In the protective relay device,
When a reset request signal is received from the remote monitoring and control device, and a condition that a serious failure, a device is not used, a check is not defective, and a calculation unit failure is not satisfied based on the state of the protective relay device Hot-starting the protective relay device;
After the hot start, if a serious failure has not been recovered after a predetermined time has passed, a step of cold starting the protective relay device;
When a reset request signal is received from the remote monitoring and control device, and when the conditions of serious failure, device nonuse, inspection failure, and arithmetic unit failure are satisfied based on the state of the protective relay device Cold start the protective relay device;
A method for resetting a protective relay device, comprising:

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