JPS5821995A - Remote supervisory and controlling 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 The present invention relates to a remote monitoring and control device capable of simultaneously controlling a plurality of controlled machines 8h.

In general, a remote monitoring and control device has a control system, a display, and an RI measurement system, and a master station and a slave station are organically connected. ) selection and control of 24IIIiI! Perform step 7 for each device individually. FIG. 1 shows a schematic configuration (a) and a control frame configuration (t)l, (0) of a conventional remote monitoring and control device. A master station 11 as a control side and a slave station 12 as a controlled side are coupled through a transmission path, and the slave station 12 operates a device 13 in response to a control command from the master station 11. The control command is given in a frame structure in which the synchronization word 14 and the selection control word 15 constitute one frame, as shown in (b).
As shown in (C), a 6-bit word address (supergroup address, large group address) 16 that generally identifies a slave station or a large group of devices within a slave station and its parity bit (1
It has a 44-bit configuration consisting of a 17.1-bit 7 lag 18, a 5-bit machine selection address 19 including a constant mark code, and an individual selection address nod and 3 bits (22 bits).

To control the device 13 by the master station 11, a control command is given to the slave station 12 using the above-mentioned transmission format, and when the fixed mark and parity bit are checked, the slave station 12 sends a selection completion signal to the selection data of the device. 7 with a lag of 18 and returns it to the master station. In response to this selection completion return signal, the master station 11 puts predetermined control data in a control bit and sends it to the slave station 12, and the slave station operates the selected device according to the control data, for example, closes a switch. . Here, when the slave station 12 receives one selection signal, it is configured not to accept a new selection signal unless there is an instruction to cancel the selection signal.
In other words, multiple devices should not be controlled simultaneously.

By the way, in recent years, computer systems for monitoring and controlling power generation and substations have often been introduced, and the remote monitoring and control equipment that serves as the actual control means for the computer system is used to collectively monitor and control the system equipment in charge. When attempting to do so, the problem is that conventional remote monitoring and control devices do not have the ability to control multiple devices simultaneously.

For example, for the voltage/reactive power side of the power system (VQ sub-control), it is necessary to simultaneously operate the load tap changers of multiple transformers that are systematically operated in parallel for reasons such as preventing cross current within the system. However, with conventional remote monitoring and control equipment, each tap changer must be operated at a different time because one device/one operation is performed at the same time, which can cause problems such as sideways in the system. Current remote monitoring and control equipment requires at least several seconds for one control, and in a facility where there are many transformers to operate the tap changer during load, it may take several tens of seconds to complete the control of all the tap changers. As a bonus, cross-currents will occur in the system during that time.

The present invention has been made in response to the above-mentioned sentiment, and enables simultaneous control of multiple devices directly from the master station as necessary without impairing the monitoring and control functions of conventional remote monitoring and control devices. The purpose is to provide a remote monitoring and control device.

FIG. 2 is a block diagram of a slave station control section showing an embodiment of the present invention. Series-parallel (
sp) A main control section comprising a control section 23B consisting of a conversion section, a decoding circuit, and a selection control output circuit. Demodulation of information transmitted from the master station Note D! is converted into a parallel signal by the 8P converter, and from this signal, the control unit 23B determines the control equipment and its control contents to obtain the control output DI of the control equipment for mosquito hitting.

In such a slave station main control unit configuration, an auxiliary control unit for simultaneous control of devices is provided between the sP converter unit and the control unit Z3B, which is coupled to the slave station control unit.

This control unit U includes a word address discrimination circuit U which discriminates from the word address data whether to control one device or simultaneous 1111# of the decimal devices among the parallel signal outputs of the sp converter U, and this discrimination circuit Sum. A decoding circuit 24B decodes data such as the controlled device and its control contents when it is determined that several devices are under control at -j, and a control signal Ds t- for the corresponding device input based on the decoding information of this decoding circuit 24B. In addition, the selection control output circuit 240 outputs the device selection information 0"V'i. When the word address data becomes the normal one device control for discrimination in the word address discrimination time wI24, the control@device Data such as the control contents and the like are taken into the selection control output circuit B.

Here, the selection control word structure in the present invention is the data format shown in FIG. Make it.

In Figure 3, the word address δ is multiple devices that can be distinguished from li device feeding at the same time? It is a number that specifies Ill control, and the difference in word address data makes it possible to distinguish between one-device ItIl control and multiple-device simultaneous control. Parity added,
27 and 7 lags are made the same as in Figure 1 (0).

Devices to be controlled simultaneously are individually assigned to the device selection word 4 of 10 bits, which corresponds to the group selection 19 in the case of one device control and the addition part for each garden selection, in accordance with the bit positions. For example, if the first and third bits are 111, it means that the first and third devices are selected. The 3-bit control data is added to the control content of the selected device in the same way as in the case of FIG. 1 (0).

Note that the control unit β can be configured as a hardware using a normal IC circuit and added to the existing slave station control unit, or if the control unit β is configured with a microcomputer, multiple programs can be added to the program. Create a software configuration that uses a control unit that includes a program for simultaneous device control.

FIG. 4 illustrates the selection control output circuit 240 and shows one pair of relay contacts. The contacts Pao and Pa1 are opened and closed according to the contents of the control data to open and close the control power supply for each device. Contact 811 #B11 #sLm #”11
a"m a """" 5101 x '161 e
81 (l stands for 10 devices, 1, 2...
. . , Reference 10, 1] control output section, and operates the corresponding device -1-+10 and displays its fitl control status based on the data at the corresponding bit position of the device selection data 4. For example, if equipment wells 1 to 10 are load tap changers for parallel transformers, the contact PS on the tap will be used as a prayer contact, and the contact PS.

The lower part of the tap is used as a contact point for training, and the contact point Sli is 11m.
8m1s8Mp・・・・・・z 8101181
02 is set as the tap selection position contact of each device, and the contact date is 11 s Bm s...

81@ is used as the surface water contact during position selection.

By adding such a control unit 24 to the conventional slave station and transmitting the data shown in FIG. The master station adds the control details to the control data (data) and sends it back to the station.
+ degree data transmission is performed, and as a result of checking the control contents for constant marks in the decoding circuit 24B, the selection control output circuit 24
Performs simultaneous control of the numbered devices that change the value to 0. Applicable &
When the device's operation light is completed, the signal is sent back to the master station via the display signal system, and the master station cancels the first control command and enters the next control.

Fig. 5 shows the control flow of the bottle storage machine in simultaneous control 1 of '4JL Kaiso 6, equipment, selection and confirmation of the selection (step BT1), Vk1 machine operation command (step 8TII) , the control ends (step θTs), such as canceling the control command and canceling the selected relay O.

Based on the above, the present invention provides a system that allows simultaneous control of multiple devices without installing a dedicated device such as VQANT in the slave station, by only adding a partial circuit or changing the program to a conventional remote monitoring and control device. It also expands the functionality of the remote monitoring and control device, making it more economical.

Note that when controlling devices simultaneously, the selection may be made using one bit, and the redundancy is lower than the device selection using five bits in normal control. Confirming equipment selection rarely reduces reliability.

[Brief explanation of the drawing]

Fig. 1 A block diagram (&) and a data configuration diagram (bl, (01, fm) for explaining the Fi remote monitoring and control device Wt'
Figure 2 is a configuration diagram of the main parts of a slave station showing one embodiment of the present invention;
FIG. 4 is a circuit diagram showing an embodiment of the selection control output circuit 240 in FIG. 2, and FIG. FIG. 11... Master station, 12... Slave station, 13... Failure notification device, 14... Synchronization word, 15... Selection control word, Ru... Control unit on slave station, of course... -Slave station auxiliary control @ section, Mumu...Series-parallel converter, 23B...Control section, 24A
・-word address discrimination circuit, 24B... decoding circuit,
24C...Selection control output circuit, reference 11 reference 2j...
..., Red 10...Breaking #equipment.

Claims (2)

[Claims] (1) Word address data that identifies a slave station in charge of a group of controlled devices or a large group of controlled devices in a slave station circle, and one target address in a sales slave station! ti11 - Selection data that specifies the device, control data that specifies the control answer of the selected controlled device, and t- Transmitted from the master station to the slave station to control the corresponding controlled device on the slave station side. In the remote monitoring and control device, the data sent from the master station to the slave station is stored in the word address data of multiple controlled devices as necessary.
The content to be controlled is enriched, the selection data is data specifying multiple controlled devices, and the control data is control data for multiple controlled devices! f+! A remote monitoring and control device whose main purpose is to obtain simultaneous control outputs of multiple controlled devices to a slave station by giving +11 commands. (2) Word address data that specifies a slave station in charge of a group of broken devices or a large group of controlled devices within a slave station, selection data that specifies one controlled device within one slave station, and selected data. In a remote monitoring and control device that transmits control data that specifies the control self-response of a device and t-from a master station to a slave station to control the corresponding controlled equipment on the slave station side, the slave station transmits control data from the slave station to the slave station. If necessary, the word address data includes content for simultaneously controlling a plurality of controlled devices, the selection data is data that specifies a plurality of controlled devices, and the control data is set to include a number of controlled devices. A control command is given as control data for the controlled device, and the slave station displays the selection completion status of multiple Mt control 1 devices specified by the above selection data from the slave station to the planting station. A remote monitoring and control device that corresponds and returns the data, and when it is confirmed that the selection completion data is common to the selection data in the event of a breakdown, the slave station obtains simultaneous control outputs of a plurality of controlled devices.