JP2598101B2 - Distribution line monitoring system - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a distribution line monitoring system that drives and controls distribution equipment disposed on a distribution line.

[Prior Art] As a distribution line monitoring system in a conventional loop distribution, for example, as shown in FIG. 4, a remote monitoring control device master station (hereinafter referred to as master station) 2 of a monitoring station 1 is a loop distribution network. A switch which controls the switch SS based on the data of the slave station B of the switch SS disposed on each of the three distribution lines 3a has been proposed. In this monitoring system, the master station 2 always receives data (for example, a voltage value, a current value, a phase, and the state of the switch SS) from the slave station B via the communication device 4 and the communication line 5. If a ground fault occurs at point T in power transmission section A, slave stations B1, B2, and B3 in power transmission section A transmit the data to master station 2, and master station 2 is stored in advance based on the information. Out of a large number of accident return information that seems to be the best. Based on this information, the switch SS is controlled via the slave station B, and finally the switches SS3 and SS4 are opened so that only the power transmission section A3 at the ground fault point T is cut off. The power is transmitted to the distribution line 3a.

[Problems to be Solved by the Invention] However, in the above distribution line monitoring system, the master station 2 determines and controls the switch SS based on the information of the slave station B. Further, the more complicated, the longer it takes to recover from the accident by the proper judgment of the master station 2. Further, when the second accident occurs in another place before the restoration of the first accident occurs, there is a problem that it is not possible to immediately cope with the second accident and it takes time to recover the accident.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a distribution line monitoring system having quick response and flexibility to solve the above problems.

[Means for Solving the Problems] In order to solve the above problems, the first invention of the present application provides a power distribution device for each section of a distribution network, and communicates between slave stations that drive and control the power distribution device. Each slave station has a detection means for detecting a fault in the management section of the slave station, detection data of another slave station transmitted from another slave station, and power distribution equipment of another slave station. Receiving means for receiving status data relating to the slave station, and generating means for generating operation command data for the slave station based on the received detection data and status data of the other slave station and the detection data and status data detected by the slave station. Drive control means for driving and controlling the power distribution equipment of the slave station based on the operation command data, state data of the slave station regarding the drive control result of the slave station, detection data of the slave station, and detection of the received slave station. De The main point is that transmission means for transmitting data and status data to another slave station is provided.

In a second aspect, the gist is that the communication line is an optical fiber communication circuit.

[Operation] Accordingly, each slave station receives the detection data of the whole slave station and the status data of the entire distribution device, and updates the data if the previous detection data and the status data of the distribution device are different from each other. Thereafter, operation command data of the slave station is generated based on the detection data and the state data, and the power distribution device is drive-controlled based on the operation command data. Then, the status data and the detection data on the power distribution equipment of the slave station regarding the drive control result of the slave station are transmitted to the other slave station together with the received detection data and status data on the other slave station.

Embodiment An embodiment of the present invention will be described below with reference to FIGS.

FIG. 1 shows a loop distribution network 8 monitored by a remote monitoring control device master station (hereinafter referred to as master station) 7 disposed in a monitoring station 6, and the loop distribution network 8 is a substation ( (Not shown). A switch as a distribution device is provided for each section of the distribution line 9 of the loop distribution network 8.
A large number of SSs (30 in this embodiment) are arranged.

A communication line 10 is arranged in parallel with the loop power distribution network 8, and the communication line 10 is provided with a remote monitoring control device slave station (hereinafter referred to as a slave station) provided corresponding to each of the switches SS. K) is disposed.

The communication line 10 is connected to a master station 7 that monitors each slave station K. The communication line 10 employs an optical fiber communication circuit.

Next, the configuration of each master station 7 and slave station K will be described.

As shown in FIG. 3, one slave station K has a communication device 11 as a receiving and transmitting means for transmitting and receiving a data frame D transmitted from another slave station K, and a data frame transmitted to the communication device 11. Control computer 12 as generating means for driving and controlling the switch SS based on D and the like, and driving control means
And various detection devices 23 provided as detection means such as a current transformer, a voltage detector, a zero-phase current detector, and a zero-phase voltage detector provided in the distribution section managed by the slave station K.

The communication device 11 is connected to a communication line 10 and has an interface 13 having a mutual conversion function between an optical communication signal and an electric signal.
A RAM 14, a ROM 15 for storing various control programs such as a communication line network control program, and a CPU 16 for performing communication control,
Data frame D from slave station K can be written
And a Dual Port RAM (hereinafter, referred to as DPR) 17. The DPR 17 is divided into a storage area for a transmission information area and a control computer processing information area. The DPR 17 is a RAM that can simultaneously respond to accesses from both the CPU 16 and the control computer 12.

The control computer 12 receives the previous self-detection data and status data from the DPR 17 of the communication device 11,
CPU 18 for sending and receiving detection data and status data, RAM 19 for writing the data, ROM 20 for storing various control programs, and outputting a drive signal to switch SS or receiving detection data from various detection devices. An interface 21 is provided.

The CPU 18 rewrites the current detection data sent from the various detection devices 23 to the RAM 19.

The ROM 20 also contains the control device program and the switch SS
An operation processing program is stored in advance. This operation processing program assumes a state of an accident or the like that may occur in a distribution line section managed by each slave station K in the distribution network 8,
Correspondingly, it is composed of operation command data to be controlled by the slave station K.

When the detection data and the status data are input to the communication device 11 and the control computer 12, the processing is performed in the order of input and output in the order of processing. First In Fir
st Out, hereinafter referred to as FIFO). Reference numeral 22 denotes a repeater for transmission and reception between the slave station K30 and the master station 7, and between the master station 7 and the slave station K1.

A data frame D transmitted / received from each slave station K to the slave station K and between the master station 7 and the slave station K via the communication line 10 is transmitted through the communication line 10 in one direction (clockwise direction in FIG. 1).

The data frame D has the number of data areas corresponding to the number of slave stations K provided in the distribution network 8. The data area relating to each slave station K includes an identification data area for identifying the slave station K, a switch SS of the slave station K, a status data area indicating the status of the slave station K, and detection data indicating various detection values of the slave station K. It consists of an area. Therefore, when the individual data frames D are described using the data frame D1 as an example, the identification data area is data indicating that it is the data frame D1 of the slave station K1. The status data area is the self-diagnosis data of the opening / closing of the switch SS and the slave station K1. Further, the detection data area includes detection data such as current, voltage, zero-phase current, zero-phase voltage, and phase detected by the various detection devices 23.

The operation of the distribution line monitoring system configured as described above,
The effect will be described.

As shown in FIG. 1, the master station 7 of the monitoring station 6 receives a data frame D in which various data of the slave station K is written via the repeater 22 from time to time, and receives various data of all the slave stations K1 to K30. The data is stored in a storage device (not shown) and transmitted again to the slave stations K via the repeater 22 (clockwise in FIG. 1). Then, the transmitted data frame D is the slave station.
The data is written in the transmission information area of the DPR 17 under the control of the CPU 16 via the interface 13 of the communication device 11 of K1.

Subsequently, based on the identification data for the slave station K1, the previous detection data and status data in the data frame D1 are converted to the DPR17.
Is transferred to the control computer processing information area. If the transferred data frame D1 is different from the current detection data, the CPU 18 updates the rewrite detection data to the current detection data. And the updated data frame
The data frame D of D1 and other necessary slave stations K are written into the RAM 19 of the control computer 12, and are previously determined based on the detection data and the state data of these data frames D.
Referring to the operation processing program stored in the ROM 20,
The appropriate operation command data is called, and the CPU 18 controls the drive of the switch SS1 based on the operation command data.

Thereafter, if the detection data such as the zero-phase current value, the zero-phase voltage value, and the phase is different from the updated detection data by the various detection devices, the detection data of the data frame D1 written in the transmission information area of the DPR 17 is updated. Slave station K1 in the transmission information area
Of the state data of the switch S after the drive control of the switch SS1
Update to S status data. And the newest slave station K1
Is transmitted to the slave station K2 by FIFO along with the data frames D2 to D30 of the other slave stations K2 to K30. Hereinafter, the other slave stations K2 to K30 perform similar processing.

In this loop-shaped distribution network 8, the automatic segment switch SS
If a ground fault occurs at the point T of the distribution line 9 as shown in FIG. 1 when the circuit 17 is open and power is transmitted from a substation (not shown), the zero-phase current value and the zero-phase current The various detection devices 23 of the slave station K15 detect changes in the voltage value and the like. Therefore, based on the detection data of the slave station K15 in the ground fault accident section and the transmitted detection data of the other slave station K, the control computer 12 of the slave station K15 determines that the ground fault has occurred in the management section of the slave station K15. It is determined that it is later. Then, the control computer 12 of the slave station K15 writes in the data frame D15 of the data frame D the changed zero-phase current value, zero-phase voltage value and the fact that it is on the load side of the switch SS15 to the slave station K16 of the switch SS16. Send.

In the slave station K16, the data frame D transmitted from the slave station K15
Switch SS16 based on the current detection data of slave station K16
Is determined to have occurred on the power supply side. Thereby,
The child station K16 opens the switch SS16 at its own discretion. The control computer 12 of the slave station K16 writes these results in the data frame D16 of the slave station K16 and transmits the result to the slave station K17 of the switch SS17. After confirming that the switch SS16 has been opened by the data frame D, the slave station K17 closes the switch SS17 by its own judgment of the slave station K17. Therefore, power is transmitted from the reverse phase to the distribution line 9 in the management section of the slave station K16. Then, when this data frame D loops and is transmitted to the slave station K15, the slave station K15 confirms that the switch SS16 is open, and the slave station K15 opens the switch SS15 by its own judgment. .

As described above, each of the slave stations K determines the slave station K by appropriate operation command data based on the detection data of the slave station K as a whole, the status data of the entire power distribution device, and the current self-detection data and status data. Since the switch SS can be driven and controlled, not only can flexible response be possible,
The burden on the master station 7 is reduced.

Furthermore, it is possible to respond to an accident recovery more quickly than before, and to shorten the recovery time.

Further, in the power distribution monitoring system configured as described above, it is easy to reconstruct an extension or the like simply by changing the relay point of the communication line 10, and is excellent in expandability and flexibility.

Furthermore, since the transmission loss of the data frame D is extremely small by employing the optical fiber communication circuit, long-distance communication is possible.

By making the communication line 10 a multiplex line, even if one of the lines fails, communication is not adversely affected, and the reliability is improved.

[Effects of the Invention] As described in detail above, in the present invention, an operation command generating means for generating operation command data for a slave station and a drive for driving and controlling the power distribution equipment of each slave station based on the operation command data. Provision of the control means enables quick response to a failure or the like. As a result, there is an effect that the responsiveness is excellent and a flexible response can be made.

[Brief description of the drawings]

1 to 3 show one embodiment of the present invention, FIG. 1 is a block diagram showing a distribution line monitoring system, FIG. 2 (a) is a block diagram showing a configuration of an entire data frame, and FIG. ) Is a block diagram showing a configuration of one data frame, FIG. 3 is an electric block circuit diagram showing a configuration of a slave station, and FIG. 4 is a configuration diagram showing a conventional example. 8 ... distribution network, 10 ... communication line, 11 ... communication device as transmission means and reception means, 12 ... control computer as generation means and drive control means, 23 ... detection device as detection means, SS ... Switch as distribution equipment, K ...
…Slave station.

Claims (2)

(57) [Claims] A distribution equipment is provided for each section of the distribution network, and communication is performed between slave stations that drive and control the distribution equipment via a communication line, and each slave station receives a fault in a management section of the slave station. Detecting means for detecting, detecting means for receiving detection data of another slave station transmitted from another slave station and status data regarding power distribution equipment of the other slave station, and detection data of the received slave station of another slave station Generating means for generating operation command data for the slave station based on the status data and the detection data and status data detected by the slave station, and drive control means for driving and controlling the power distribution equipment of the slave station based on the operation command data And transmission means for transmitting the status data of the slave station and the detection data of the slave station regarding the drive control result of the slave station and the received detection data and status data of the received slave station to another slave station. And a distribution line monitoring system. 2. The distribution line monitoring device according to claim 1, wherein said communication line is an optical fiber communication circuit.