JPS60257723A - Annular line system protecting device - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed description of the invention] [Industrial application field] The present invention relates to a ring system protection device 4.

[Conventional technology]

Figure 5 is a system diagram showing a conventional example of the ring system protection system. In Figure 5, PO is the power supply, RYI, RY2 are the consumers w
Differential relay for short circuit and ground fault installed in 1 to LO4'', R
Yo is a differential relay for short circuits and ground faults installed on the substation side,
RY3 is the undervoltage and ground fault overvoltage relay installed i4 on the substation side, CT is the current transformer that obtains current information, and B[JS+
~f3Us4 is the demand moped (gTr, PT is the transformer, CB
o, CB+, CB2 are circuit breakers.

When the relay 1' (Y) operates, it is cut off:
The circuit breaker CB+ is set to be tripped when rCr3z is tripped and relay RY2 is activated.

[Problems that the invention attempts to solve]

The protection device shown in FIG. 5 cross-connects the current transformers CT, and uses the current information obtained from the current transformers CT to create a relay ]''LY+.

RY2 is operated to protect against track accidents, customer busbar accidents, etc. However, the conventional device shown in FIG. 5 has a problem in that it is necessary for the relay to be maintained and inspected by the person in charge of using the relay at the customer, and it is also necessary to go to each customer to carry out the maintenance and inspection.

This invention was made in view of the above-mentioned circumstances, and a protective relay is installed in the demand line to detect failures, failures, etc. from the current information of each bus bar. It is an object of the present invention to provide a ring line system protection device which is capable of not only making it possible to cause the information transmission line to slip, but also to judge the failure of the information transmission line or the like.

[Means and effects for solving the problem] The present invention transmits various information between a master station equipped with a central processing unit and a plurality of slave stations through optical transmission lines, and provides a pair of such transmission lines. The same information is transmitted to the master station through the transmission lines in opposite directions to each other, and thereby the master station determines whether there is an abnormality in the transmission line, slave station, etc., and performs protection processing.

〔Example〕

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

In Figure 1, MAS is a master station installed on the substation side, and this master station MAS is a central processing unit CP (J
, a transmission intervoice R for transmitting and receiving data (information) transmitted in a clockwise direction as shown in the figure, and a transmission interface L for transmitting and receiving data in a counterclockwise direction in the figure. The central processing unit CPU receives current information +l+i+, i+o from the current transformer CT shown in Fig. 5 and voltage information V from the transformer PT. 5L1131~5
UB4 is a slave station installed in each consumer Lot to LO4 (not shown in Fig. 5), and these slave stations 5Ull+ to 5 (JI34
are central processing units CPU+ to CPU4 to which current information i] to 19 of each consumer LO] to LO4 is input, transmission interfaces R1 to R4 that transmit and receive data transmitted clockwise in the diagram, and transmission interfaces R1 to R4 that transmit and receive data clockwise in the diagram It is composed of transmission interfaces L to L4 that send and receive data to be transmitted. In particular, central processing units CPU1 to CP of slave station S [JI3+-8LJB4 [J4 are input current information 11 to j9
A/D conversion (Analog-to-digital conversion) function and transfer data are received from the master station MAS.
, has the function of tripping the C132, etc. D
R+-I) R5 and DL+ to DL5 are optical transmission lines made of optical fiber cables, and these optical transmission lines DR+ -D
R5 and I)Ll~DL5 connect each transmission interface R, R1~R4, Ll~L4, and transfer data is transferred to these optical transmission lines DR,+~])Rs and DL+~DL.
5.

Next, the operation of the above embodiment will be described. When the transmission interface R+ of the slave station 5 (JBx) receives the transfer signal (downlink signal) fc from the master station MAS, the current information 12°R3 input to the central processing unit CPU+ of the slave station S[JB+
The interface R1 is superimposed on the optical transmission line DI (,2).
Let it be transmitted from the transmitter. The signal transmitted to the optical transmission line]) Rz is input to the transmission interface R2 of the slave station 5UB2, and in the same manner as described above, the signal is superimposed with 'b: flow information i4゜+5 and transmitted to the optical transmission line DR3. Thereafter, the current information up to the slave station SOB 4 is similarly supplied to the transmission interface R of the master station MAS via the optical transmission line DR5f. The information corresponding to the home is distributed to the master station MAS
It is stored in the central processing unit 3 CPU. Note that the counterclockwise rotation is also processed in the same way.

Here, the reason why the data is clockwise and counterclockwise is to ensure that protection is possible even in the event of a break in the optical transmission line or the creation of a new consumer.

Next, in the configuration as in the second embodiment, the slave stations SUB+ ~S
U I'34 in, interface I(,] ~ I(
4, L+ ~L4゜Central processing unit CPU +~CP[J4
abnormality, abnormality in the main power supply, or optical transmission line D
H1~I)f(s and DL+~DL4 (υ〒) line, etc., the maintenance processing becomes impossible and a bug occurs. Therefore, when the power supply of each customer is abnormal or the central processing unit CPLJ+~CPU4
In the event of an abnormality, the current information and transfer (
The acceptance of the IT issue is not δ/, Ω.

Such a situation can be dealt with by a wide-area differential as shown in FIG. In FIG. 2, for example, when slave station 5LIB+ is in an abnormal state as described above, current information i2. Data of i3 is not transmitted to master stations MA and S. Therefore, 'f1. This will be handled by a wide area differential (using relay 87B) for flow information and iThk.

When the relay 87B operates (-), the circuit breaker CBo and the circuit breaker CI3+ of the customer LO2 are tripped. ~DRr, and DL+~1)L
5 disconnection, power supply characteristics of the customer, abnormalities in transmission interfaces Rr to R4, L+ to J-14, and central processing unit CPU
The table in FIG. 3 shows what happens to the uplink signal (or downlink signal) transmitted by the master station MASK when there is an abnormality in CPIJ1 to CPIJ4. Figure 3 IC: I'6, R-system data is transmitted clockwise, L-system data is transmitted counterclockwise, and upstream is transmitted from the slave station to the master station. Downlink refers to the data transmitted from the master station to the slave station. Also, in Figure 3, ○
The mark indicates that data reception is possible, and the mark "x1" indicates that data reception is impossible.

7; As shown in K31'E41, when the optical transmission line is disconnected or there is an abnormality in the transmission interface, do you receive electricity from each customer? Since the ft information is normally transmitted to the master station MAS either clockwise or counterclockwise, the sleep-keeping process can be performed without any problem. In addition, if the information for both clockwise and counterclockwise rotations is normal, the priority order is balanced and used.

In the case of an abnormality like the one mentioned above, protection processing can be carried out without any problem.
~When the CPL 14 is abnormal, the current information of the abnormal customer is not transmitted, and the transfer trip signal cannot be received. In such a case, the wide-area differential shown in FIG. 2 can be used to deal with this situation. Furthermore, it is absolutely necessary to make the I/C that requires no maintenance rather than automatic monitoring to clarify each of the failure parts mentioned above. Figure 4 is a flowchart 1 for detecting the fault location, and is for a case where N consumers are arranged in a loop configuration 1''. In Figure 4, 1 ((K) is When the R system uplink data is [-1], it is received (i is possible, and when it is "0", it is not possible to receive.
(K) is the L system uplink data to the slave station, and the reception of "1" (
Fi is available, and when it is "0", reception is not possible. R, (K)・R
(I) indicates logical product and R(K) -1-1' ((I) indicates logical sum, respectively.

〔Effect of the invention〕

As described above, according to the present invention, transmission of various information between a master station equipped with a central processing unit and a plurality of slave stations is carried out by an all-optical transmission line, and a pair of transmission lines is provided, and a pair of the transmission lines is provided. Since the same information is transmitted to the master station in opposite directions on the optical transmission lines, it is possible to securely protect the optical transmission lines without installing a relay at the customer, and the optical transmission line can be easily protected. There is an advantage that even in the event of wire breakage or child end failure, these failures can be determined on the master station side.

[Brief explanation of drawings]

Fig. 1 is a configuration explanatory diagram showing an embodiment of the present invention, Fig. 2 is a system diagram for explaining wide-area differential, and Fig. 3 is capable of receiving clockwise and counterclockwise signals in the event of an abnormality. FIG. 4 is a flowchart for detecting a faulty part, and FIG. 5 is a system diagram showing a conventional example. MAS...Master station, 5UI3+ to 5UB4...Slave station, D old to DR5 and f) 1 port to I) L5...Optical transmission line, R9L...Transmission interface.

Claims (1)

[Claims] (1) A master station with a central processing unit is installed on the substation side of the loop system, and this master station receives current information of each customer from slave stations with a central processing unit, and the central processing unit makes decisions based on this information. Based on the judgment results, a maintenance device that performs protection processing for the loop system by transmitting information for tripping each customer's (~ and A ring system protection device characterized in that information is transmitted through an optical transmission line, and a pair of transmission lines P6 are provided, and the same information is transmitted to the master station through the pair of transmission lines in opposite directions. .