JPS6277838A - Switching controller - 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] [Technical Field of the Invention] The present invention relates to a switching system (2), which is particularly suitable for operating circuit breakers, disconnectors, etc. It relates to an opening/closing control device.

[Technical disadvantages of the invention and its problems] Conventionally, when controlling the opening and closing of AIGI devices and disconnectors in power receiving and substation equipment, a control switch that gives an opening/closing signal and a prevention of erroneous closing (hereinafter referred to as an interlock) have been used. A method has been adopted in which mechanical contacts intended for this purpose are connected via electrical cables and a signal is given to each m4.

FIG. 6 shows a system diagram of a general power receiving and transforming facility, and therefore shows the arrangement of the control device and the route of the optical fiber cable. As shown in the figure, the main circuit M is constituted by a system extending from a power receiving station 1 to a power distribution station 3 via a power substation 2.

The lead-in line to the power receiving station 1 is integrated from the system that passes through the disconnector DSI and the system that passes through the disconnector DS2, and is led out via the circuit breaker CBI and the voltage transformer MOF. Disconnector DS1 in power receiving station 1. DS2. The circuit breaker cB1 is connected to the control devices C and C2 linked via the optical fiber cable OF1.
, C3 and a control device CNTl.

The main circuit M is led out from the power receiving station 1 via the instrument voltage transformer MOF and connected to the substation 2.

At substation 2, main circuit M is connected to disconnector DS3 and circuit breaker C.
B2, transformer TR1, circuit breaker C (system passing through 34, disconnector DS4, circuit breaker CB3, transformer TR21! disconnect mcB4
It is divided into systems that pass through and is connected to the next power distribution station 3.

Disconnector DS3 in substation 2. DS4, circuit breaker ・CB2
．． C83, CB4. CB5 is optical fiber cable OF
Control devices C4, C5, C6, C linked via 2
7, C8, C9 and the control device CNT2.

At power distribution station 3, main circuit M is connected to circuit breaker CB6. CB7゜CB9.
Power is separated and distributed into systems passing through CB10.

In addition, the main circuits M introduced into the power distribution station 3 in two systems can be separated by a circuit breaker CBB for busbar connection.

Note that the circuit breaker CB6 in the power distribution station 3. CB7°CB8. C
B9. Is CBIO a control device linked via optical fiber cable OF3? ftc10°C11, CI2.
(Controlled by C13, C14 and CNT3.

In this configuration, each circuit breaker CB1. CF32. CB3゜C[34,
CB5. CB6. CB7. CB8. CB9 and CB10 act to disconnect the main circuit M in the event of a system abnormality.

On the other hand, disconnector DS1. DS2゜DS3. DS-4 has the effect of separating any branched lineage from the main lineage.

In order to simplify the explanation, there is one optical fiber cable loop in each of the power receiving station 1, the substation 2, and the power distribution station 3.

In addition, optical fiber cable OF1. Arrows OF2 and OF3 indicate the flow of signals.

First, to explain the power receiving station 1 as an example, the meter control device CNT
The output signal from 1 is transmitted by the optical fiber cable OF1 and inputted to the control device C1, and similarly the output signal from the control device C1
to C2, control device C2 to C3, control device C3
A signal is transmitted from there to the control device CNT1. The first thing to note here is that the route of the optical fiber cable mainly passes over the circuit and is circular.
This means that there is no need for a cable pit for fiber optic cables. Circuits are configured in the same manner in the substation 2 and the power distribution station 3.

In the power receiving and transforming equipment shown in FIG. 6, a switching control device as shown in the configuration diagram in FIG. 7 has conventionally been applied.

FIG. 7 shows an example of the control system of the power receiving station 1.

As shown in FIG. 7, in the control center 4, the power receiving circuit breaker CB
Control switch 081.1 which gives an on/off signal to 081.1.
One side of C82 is connected to the P power supply, and the electric cable B1 is connected to the power receiving station 1 through this cable B1.
send a signal to. At the power receiving station 1, a fault trip contact 86, a disconnector DS1. To interlock the DS2 limit switch and $1 to L86, etc., connect each device with an electric cable B2. Connect via B3. In addition, the b contact of the circuit breaker CB1 is required as an interlock for the disconnectors DSi and DS2, and these are connected to the electric cable B4. At B5, connections between each □ box are established. The circuit breaker CB1 is driven by a 1-ripping coil TC connected to the electric cable B1 and a closing coil CC connected to the electric cable B3.

However, the above configuration has the following problems.

In other words, a control cable for opening and closing the circuit breaker CB1 is absolutely necessary, and in order to make this control cable less susceptible to induced noise from the main circuit, a pit dedicated to the control cable is required. Furthermore, in the case where the control center 4 and the power receiving station 1 are located far apart, for example, over 500 m, in order to prevent malfunctions due to induced noise, lightning surges, etc. A transfer device as exemplified in the publication is required. However, this system uses an optical fiber to transfer control signals for circuit breakers, etc. between the TIT control center and the controlled station, making the photoelectric conversion system complicated and expensive. . In addition, although this transmission device uses optical fiber cables that can transmit a variety of information, it only transmits one signal, which has the advantage of being resistant to noise, but the problem is that the system lacks effectiveness. There was also.

[Purpose of the invention]

SUMMARY OF THE INVENTION Therefore, an object of the present invention is to solve the above-mentioned problems of the prior art and utilize the noise resistance of optical fiber cables and the ability to transmit a large amount of information to provide a large number of circuit breakers and disconnectors with a simple configuration. It is an object of the present invention to provide an opening/closing control device that enables opening/closing control of.

[Summary of the invention]

In order to achieve the above object, the present invention is arranged corresponding to each switching means in a system including a plurality of switching means, inputs the status of each switching means, and sends switching signals to each switching means. a control means having a function of storing the states of all the opening means and the state of the control signal; a control device having a means for storing the control signal to the grid; the plurality of control means; The present invention provides an opening/closing control device that is provided with a transmission means that links the control devices with an optical signal and exchanges information between the corresponding storage means.

[Embodiments of the invention]

Hereinafter, the present invention will be described in detail with reference to the drawings.

FIG. 1 is a block diagram of an opening/closing 1111 enclosure device according to an embodiment of the present invention, particularly illustrating the case where it is applied to Il control of a power receiving station 1 of the system shown in FIG. 6. In the same figure,
The control I device 1 controls the disconnector DS1, the control I device C2 controls the disconnector DS2, and the control device C3 controls the circuit breaker CBI. The control device CNTl includes a disconnector DS1. It has the function of receiving and receiving ON/OFF signals of DS2 and circuit breaker CBI, and transmitting them to other control devices C1, C2, and C3. By the way, control device CN T 14.1 control device c1. C2
, C3, or a commonly used process computer, but for the purpose of simplifying the explanation, the control device CNT1. It is assumed that CI, C2, and C3 all have the same configuration, and the control device C3 will be explained below.

The microcomputer 5 has a well-known configuration,
)j CPtJ (central processing unit) 51, R in the water
It is composed of an OM (read only memory) 52 and a RAM (random access memory) 53. A program for controlling the CPLI 51 is written in the ROM 52 . According to this program, the CPU 51 takes in necessary external data from the digital input (DI) 54, exchanges information with other devices via the serial interface (81) 55, or reads the data from the RAM 53.
performs calculation processing while exchanging data with
Relay out (RO)7 of processed data as necessary
Output to. External data is input through the DI 54, the status signal of the circuit breaker CB1 is input through the signal line 8, and the fault trip signal generated along with the operation of the failure relay contact 86 is input through the signal line 9. Ru.

Information exchange with other control devices C1 and C2 is performed via a serial interface (81) 55 controlled by the CPU 51, and its function is as follows. The parallel signal of the self-control device is converted to a serial signal by 5I55, and this is converted to a serial signal by Elo
The signal is sent to an (electrical/optical) converter 10, and the E10 converter 10 converts this electrical signal into an optical signal and transmits it to another control device. Serial optical signals from other devices are 0/E (optical/electrical)
The converter 11 receives the signal, converts the optical signal into an electrical signal, and converts the optical signal into an electrical signal.
55. 3155 converts the serial signal into a parallel signal and stores it in the RAM 53 via the bus 6.

The calculation results are outputted via the relay out 7, and are outputted to the outside by turning on the contacts ROI and RO2. In other words, contact RO1 becomes 'a disconnector C' due to the on operation.
Apply a closing signal to the closing coil CC of B1, and contact R
O2 gives a trip signal to the 1-ripping coil TC of the circuit breaker CB1 when turned on. Incidentally, the dripping coil TC of the circuit breaker CB1 is also operated by the fault relay contact 86.

The control devices C1 and C2 have the same configuration as the control device C3, but the DI54 includes a disconnector DS1. On/off status of DS2, disconnector DS1. The state of the door switch of the box housing DS2, the limit switch signal indicating whether the contacts of the disconnectors DS1 and DS2 are completely open or completely closed, etc. A status signal 12 regarding DS2 is input.

On the other hand, from relay out 7, disconnector DS1. Sends out the DS2 open/close signal.

The control device CNT1 has the same configuration as the control device C3, but is connected to the DI54 by a circuit breaker CB1, a disconnector DS1. DS2
Push button switches corresponding to PBS 1 to PB
Connect Sn and input this.

In this configuration, each control device CNT1. A method of exchanging information between C1, C2, and C3 will be explained. Each control device CNT1゜C1, C2, C3 has a buffer 14 consisting of a control buffer 15, a DS1 state buffer 16, a DS2 state buffer 17, and a CB1 state buffer 18, and in the control device CNT1, only the control buffer 15 is constantly updated. , other control devices CI, C2,
Transmitting to C3.

That is, when the pushbutton switch PBSn is pressed, the corresponding bit in the control buffer 115 is set to '1', and the other bits are set to '0'.

The control I devices C1, C2, and C3 update corresponding bits in each status buffer 16, 17, and 18 according to the status input from the DI 54.

Next, the program stored in the ROM 52 is transferred to the third
The explanation will be given according to the flowchart shown in the figure.

Although FIG. 3 shows a flowchart of the control device C3, since the other control devices C1, C2, and CNT1 can be considered in the same way, only the control device C3 will be explained.

First, when the program starts, the microcomputer 5 checks the information regarding the circuit breaker CB1 in the contents of the control buffer 15 in step OO. If the fourth bit of the control buffer 15 is “1”, that is, the circuit breaker C
If B1 is ON, proceed to step 01 and the 4th bit becomes “0”.
'', that is, if the circuit breaker CBI is OFF'F, proceed to step 09. In step 01, the DS1 status buffer 1
The second bit of 6, that is, the complete closure of the disconnector DSI, is confirmed, and if it is "1", the process goes to step 03, and if it is tiO'', the process goes to step 02.In step 02, the third bit of the DS1 status buffer 16, Confirm that the disconnector DS1 is completely open, and if it is 11111, go to step 03 and “0”.
”, proceed to step OO.

In step 03, the second bit of the DS2 status buffer 17, that is, the complete opening of the disconnector DS2 is confirmed. If it is "1'°, go to step 05. If it is 0," go to step 04. In step 04, the third bit of the DS2 status buffer 17 confirms that the disconnector DS2 is fully open, and if it is "1'°, the process goes to step 05, and if IIO+1, the process goes to step OO. In step 05, the DS1 status is confirmed. buffer 16
The fourth bit of , that is, the door switch OF of the disconnector DS1
Check F, if “1”, go to step 06, “0゛′
If so, proceed to step OO. In step 06, DS2
The fourth pin 1-1 of the status buffer 17, that is, the disconnector DS2
Confirm that the door switch is OFF, and if it is 111 II, proceed to step 07, and if it is "0", proceed to step OO.

In step 07, a closing signal is output to the circuit breaker CB1, and the process proceeds to step OO. In step 09, the control buffer 15
The fifth bit of , that is, the interrupt I! Confirm that the 7i circuit breaker CBI is OFF, and if it is 1'', proceed to step 08, and if +101+, proceed to step 00.In step 08, the circuit breaker CB1 is turned off.
A trip signal is output to , and the process proceeds to step OO.

By running the above program, circuit breaker CB1
On/off control can be realized.

In addition, in the above embodiment, in order to simplify the explanation, the power receiving station 1
Although an example has been given above, opening/closing control of circuit breakers and disconnectors can be similarly performed at the substation 2 and the power distribution station 3 as well.

Further, in the above embodiment, the power receiving station 1. Control devices CNTl, CNT2°CNT3 were installed at each substation 2 and distribution station 3, but there is no need to install them separately, and the entire system can be connected to one loop as shown in the system diagram in Figure 4. You may link with a fiber cable ○.

Further, as shown in the system diagram of FIG. 5, the control device CNT1. C
NT2. Interlock is required between power receiving station 1, substation 2, and distribution station 3 by using optical fiber cables OF to transmit information between loops consisting of optical fiber cables OFI and OF2.0F3, including CNT3. It is also possible to take measures to deal with such situations.

〔Effect of the invention〕

As described above, according to the present invention, the opening/closing control of circuit breakers and disconnectors can be made highly resistant to noise and highly reliable, and is indispensable for laying control cables. A new opening/closing control device can be realized that can omit the conventional control cable pit and simplify the construction work.

[Brief explanation of drawings]

FIG. 1 is a block diagram of a switching control device according to an embodiment of the present invention, FIG. 2 is an explanatory diagram for explaining information exchange of the control device according to the present invention, and FIG. 3 is an example of a program for the control device C3. FIG. 4 and FIG. 5 are system diagrams showing other configuration examples of the switching flil control device of the present invention, FIG. 6 is a system diagram of general power receiving equipment, and FIG. 7 is a conventional switching control device. FIG. M... Main circuit, OF, OFl, OF2.0F3...
Optical fiber cable, CNTl~CNT3...control device, C1~C4...control device, CBI~CB10・
... Breaker, DS1 to DS4... Disconnector, 1... Power receiving station, 2... Substation, 3... Power distribution station, 4... Control center, 5... Microcomputer, 6 ...Bus, 7
... Relay Arct, 10 ... E10 converter, 11
...O/E converter, TR1, TR2...Transformer, C
C...Input coil, TC...Dripping coil.

Claims (1)

[Claims] It is arranged corresponding to each opening/closing means in a system with multiple opening/closing means, and has the function of inputting the status of each opening/closing means and sending an opening/closing signal to each opening/closing means. A control means having means for storing the state and the state of the control signal, a control device having means for storing the control signal to the grid, and a plurality of control means and the control device are linked by optical signals and correspond to each other. 1. An opening/closing control device comprising: transmission means for transmitting and receiving information between storage means.