JPH0274135A - Distribution line monitoring system - Google Patents

Abstract

PURPOSE:To reduce the load of a host station with excellent and soft response by performing drive control of a switchgear at a member station based on operation command data. CONSTITUTION:A host station 7 in a monitoring station 6 receives data frame D from a member station K through a repeater 22 and stores all the member stations K1-K30 then performs transmission to each member station. The data frame D is written into a DPR 17 through the interface of a communication unit 11 at the member station K1 control of a CPU 16. Then detection data and state data are transferred to the DPR 17 based on the identification data for the member station K1, and if they are different from data detected at current time point a CPU 18 updates the detected data and writes the updated data frame D1 and the data frame D fed from other member stations into a RAM 19. Then a processing program previously stored in a ROM 20 is referred based on these data and proper operation command data are called and used in the CPU 18 for performing drive control of a switchgear SS1.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a power distribution line monitoring system for driving and controlling power distribution equipment arranged on a power distribution line.

[Prior Art] As a conventional distribution line monitoring system for loop-shaped power distribution, for example, as shown in FIG. Switches S installed in each of distribution network 3 @l1I3a
It has been proposed to control a switch SS based on data from a slave station B of S. In this monitoring system, the master station 2 always receives data from the slave station B (for example, voltage values, current values, phase, switching 3
SS status) is being received. If a ground fault occurs at point T in power transmission section A, slave stations Bl, B2 . B3 transmits the data to the master station 2, and the master station 2 selects the conflict that seems to be the best among a large number of pre-stored accident recovery information based on the information. Based on this information, the switch SS is controlled via the slave station B, and the switch 333. The switch SS4 is opened and power is transmitted to the other distribution lines 3a.

[Problem to be solved by the invention] However, in the wire monitoring system using the above wiring, the slave station B
The master station 2 makes a decision based on the information of ffJ! The wider and more complex the power distribution network 3 becomes, the more time it takes for the master station 2 to make an appropriate decision to recover from an accident since the power distribution network 3 has to control the switch SS. In addition, if a second accident occurs at another location before the recovery from the first accident is completed, it may not be possible to take immediate action to deal with it, resulting in a lengthy recovery process.

The purpose of the present invention is to solve the above problems by providing quick response,
The objective is to provide a flexible power distribution line monitoring system.

[Means for Solving the Problem] In order to solve the above problem, the first invention of the present application provides a distribution tRa for each section rrR of the distribution network, and establishes communication between the slave stations that drive and control the distribution equipment. will be contacted by line, and each subsidiary station will be contacted by
Detection means for detecting the RW in the management section of the slave station, and reception for receiving detection data of other slave stations sent from other slave stations and status data for power distribution equipment of other slave stations. 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; A driver S control means for driving and controlling the arrangement of the slave station, state data of the slave station between the drive control results of the slave station, detection data of the slave station, and detection data regarding the received other slave stations; The gist thereof is that the mobile station includes a transmitting means for transmitting status data and status data to other slave stations.

The gist of the second invention is that the communication line is an optical fiber communication circuit.

[Operation] Therefore, each slave station receives the detection data of the entire slave station and the status data of the entire power distribution equipment, and updates those data if the previous detection data of itself and the status data of the power distribution equipment are different. Then, based on these detection data and status data, operation command data for the slave station is generated, and the power distribution equipment is driven and controlled based on the operation command data.

Then, the status data and detection data regarding the power distribution equipment of the slave station regarding the drive control results of the slave station are transmitted to the other slave stations together with the received detection data and status data regarding the other slave stations.

[Example] An example embodying the present invention will be described below with reference to FIGS. 1 to 3.

FIG. 1 shows a loop-shaped power distribution network 8 that is monitored by a remote monitoring and control equipment master station (hereinafter referred to as the "master station") 7 located at a monitoring station 6. This loop-shaped distribution network 8 is connected to a substation. (not shown). Then, a switch S as a power distribution device is provided for each section of the power distribution line 9 of the loop-shaped power distribution network 8.
A large number of S (30 in this embodiment) are arranged.

A communication line 10 is arranged in parallel to the loop-shaped power distribution network 8, and this communication line 1o has remote monitoring and control device slave stations (hereinafter referred to as slave stations) installed corresponding to the switch SS. K is located.

The communication line 10 is connected across seven master stations that monitor each slave station K. Note that this communication line 1o employs an optical fiber communication circuit.

Next, the configuration of each master station 7 and slave stations will be explained.

As shown in FIG. 3, one slave station includes a communication device 11 serving 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 this communication device 11. A control computer 12 as a generation means and drive control means for controlling the drive of the switch SS based on D, etc., and a current transformer, a voltage detector, and a zero-sequence current detector provided in the distribution section managed by the slave station K. , various detection devices as detection means such as zero-phase voltage detectors r! 123.

The communication device 11 is connected to a communication line 10 and has an interface 1 having a function of mutually converting optical communication signals and electrical signals.
3, a RAM 14, a ROM 15 that stores various control programs such as communication network control 10 grams, a CPU 16 that performs communication control, and a Dual Port RAM (hereinafter referred to as DPR) that can write data frames D from the slave station K. ) 17. DP
R17 is divided into storage areas: a transmission information area and a control computer processing information area. And this DPR1
7 is a RAM that can be accessed by both the CPU 16 and the control computer 12 at the same time.

The control computer 12 controls the DPR of the communication device f11.
CP that sends and receives the previous self-detection data and status data, and the detection data and status data to other slave stations from 17.
U18 and RAM1 that can write the data
9, a ROM 20 that stores various control programs, and an interface 21 that outputs drive signals to the switch SS or receives detection data from various detection devices.

The CPU 18 rewrites the detection data sent from the various detection devices 23 at each time into the RAM 19.

Further, the ROM 20 stores in advance a control device program and a switch SS operation processing program. This operation processing program assumes conditions such as accidents that may occur in the distribution line section managed by each slave station K in the distribution network 8, and consists of operation command data that the slave station K should control in response. ing.

Note that when detection data and status data are input into the communication device 11 and the control computer 12, they are processed in the order of input and output to the processed lff1. First in first out
st In First Out Below, FIFO
). Note that 22 is a repeater for transmitting and receiving between the slave station 30 and the master station 7, and between the master O7 and the slave station 1.

A data frame D transmitted and received from each slave station K to the slave station on the communication line 10 and between the master station 7 and the slave station is transmitted in one direction (clockwise in FIG. 1) through the communication 1i10.

The data frame D has a number of data areas corresponding to the number of slave stations provided in the power distribution TI network 8.

The data W1jll between each slave station K includes an identification data area for identifying the slave station K, a status data area representing the switch SS of the slave station and the status of the slave station, and various detected values for the slave station. It consists of a detection data area. Therefore, for each data frame D, taking data frame D1 as an example, the identification data area is 1 for the slave station.
This data indicates that the data frame D1 is the data frame D1. Further, the status data area contains self-diagnosis data for opening/closing of the switch SS and one for the slave station. Further, the detection data area includes detection data such as current, voltage, zero-sequence current, zero-sequence voltage, phase, etc. detected by various detection devices 23.

The functions and effects of the distribution line monitoring system configured as described above will be explained.

As shown in FIG. 1, the master station 7 of the monitoring station 6 receives data frames D in which various data are written to the slave stations via the repeater 22, and sends them to all slave stations from 1 to 30. The various data are stored in a storage device (not shown) and transmitted again to each slave station via the repeater 22 (clockwise in FIG. 1).

The transmitted data frame D is then written into 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 the slave station.

Next, the previous detection data and status data in the data frame D1 are transmitted to the slave station based on the identification data for 1.
It is transferred to the control computer processing information area of R17.

If the transferred data frame D1 is different from the current detection data, the CPU 18 rewrites the current detection data to update the detection data. Then, the updated data frame 1, ... 1) and the necessary ftQ slave station I
<'s data 9"j71.・mu】) is the control convenience store 7
912. 1- Tough) 7- MuT) Detection Butano 51
RO~1:≧06Refer to the memorized operation ear Tsururibu 1]gram in advance based on the state f'-ta'. Sweeping command de9ni j4, -, .5 it-,CP t-J 1
8K mu S S 1'! r K14 Dynamic control 51 7 After that, various 't*i11 devices are used to detect the zero-sequence current value, zero-sequence electric current Fi': 1, and the digit 1? If the detection data of D1 is occupied by the transmission information area of DPR, 1-7, the slave station of the sending ILiI information port (((
Open/close status data of station 1 "j':; S Detection-f-even to other slave stations 2-=K 30 ,
n together with data frames D2 to D30 - P I F
(,) and sends it to j'-station 2. Below - 2 to the child station of the song
〜K 30 <, Do the duck soup in the same way.

2.y) Loop power distribution network 8 with 10-5 automatic lx
Minutes, [m Closer S S 17 fi' Open circuit, illustration 1
．． If power is being transmitted from a substation with no substation 2, then at point T on the distribution line as shown in 1. ! ! Before a circuit failure occurs, the various detection devices of the slave station Ki5 detect changes in the zero-sequence current value, zero-sequence voltage value, etc. on the switch 3S15 (power supply side).
23 h<detection H, 1zu"ro. Therefore, based on the detection data of the slave station K15 in the ground fault section and the detection data of the other 1' h6 K that has been transmitted, the slave station
On the control of Koshibi, Engineering, -Yu 12, a ground fault occurred at slave station 1 (15).
If it is determined that 'A' occurs after the management section of 7, then the control computer 912 of 15 in the 2nd station will send data frame 1'')
Dataf N/-no, zero phase electric 2ffi changed to D15
(Write the 6° zero-phase Σ pressure value and the load times from switch 5S15 to switch S S 167.) Slave station I (
In 16, the pig frame D sent to slave station 16 is transmitted to slave station 15. -f is sent to slave station 15 at the current moment. Judgment. By t1~, the slave station 16 switches the switch 5 on its own judgment.
Si6 is opened, these results are expressed as f station K 16 ,
F11 system 61111: 7th beater 12 sacrificed 7th K16
Write to J1 data frame D16 Switch 5Si7
to the slave station K17). The slave station K17 confirms that the single-layer circuit breaker 5S16 is opened based on the data frame hDk, 821. 1; Closing the old force generator 5S17 as a slave station with 17's own publication FJi. Therefore, the control of 10 is sent to the slave station, and the distribution line 9 is in reverse phase.
・Power transmission is ft-ru,, do 1:7, so j7 and 242 data frames)) is-・bu<1. te-f-station 1 (15〆\, when transmitted, the slave station I 151''Lt71'l closure 8S16 is for 1 f %il-(ia, , +, p
)”, J Monument a!-7, f[K15iJ himself)'i
'J PJ7 f Open switch S S 15 6, z ty) Yoj5J, 8 LNG k 1. i-
1' Station K 'k k nom 1115 evening and 1ii
e”: Based on the status of the entire device A and the current self-detected arc oversized state arc, the slave station 1 < own f′J] is disconnected by an appropriate operation command arc! S
In addition, the burden on the master station 7 is reduced, and the burden on the master station 7 is reduced.Furthermore, it is possible to quickly respond to accident recovery in the 7th day and ζ!
-1 The recovery time can be reduced by ζ゛, right? In a power distribution monitoring system configured as shown in 1.4, when changing the relay point of the other line 10,
i? ! It is easy to rebuild facilities, etc., and has excellent expandability and flexibility.

Furthermore, an optical fiber communication circuit is adopted. - As a result, long-distance communication is possible with extremely few transmission lines L'7 of data frames I.

Furthermore, by using multiple lines for reconnaissance@10, failure of one of the lines will not adversely affect the communication, and reliability will be improved.

[Electrodynamic invention] Details above! - In the present invention, the operation command Qi, which generates imitation command data at the time of station opening, and the drive controller "G," which drives and controls the power distribution equipment of each slave station based on the operation command data, are provided. By installing it, you can easily respond to llI harm! 2. 8 (results).

Responsiveness is one of the most important aspects of being able to respond flexibly.

[Brief explanation of the drawing]

1 to 3 show an 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 the entire data frame structure, and FIG. ) is a professional diagram showing the configuration of one data frame, FIG. 3 is an electrical block circuit diagram showing the configuration of a slave station, and FIG. 4 is a configuration diagram showing a conventional example. 8... Power distribution network, 10... Communication line, 11... Communication device as transmitting means and receiving means, 12... Control computer as generating means and drive control means, 2
3...Detection device as detection means, SS...Switch as power distribution equipment, K...Slave station. Patent Applicant: Japan Lead Co., Ltd. Agent
Person Patent Attorney On 1) Hiroyoshi

Claims (1)

[Scope of Claims] 1. Power distribution equipment is provided in each section of the power distribution network, and communication lines are used to communicate between slave stations that drive and control the power distribution equipment, and each slave station has a control section for that slave station. a detection means for detecting a failure of the slave station; a receiving means for receiving detection data of other slave stations sent from other slave stations and status data regarding power distribution equipment of the other slave stations; generation means for generating operation command data for the slave station based on the detection data and status data detected by the slave station, and driving and controlling the power distribution equipment of the slave station based on the operation command data. a drive control means; and a transmission means for transmitting to other slave stations status data of the slave station, detection data of the slave station, and the received detection data and status data regarding the other slave station regarding the drive control result of the slave station. A distribution line monitoring system characterized by: 2. The distribution line monitoring device according to claim 1, wherein the communication line is an optical fiber communication circuit.