JPH0435972B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a distribution line sectional switch control device.

It is already well known that a sectional switch is used to automatically detect a faulty section of a distribution line, thereby ensuring that power is transmitted only to a healthy section. Normally, when power is retransmitted from a substation to a distribution line that has been out of power due to an accident, each section switch is turned on one after another for a certain period of time. The time limit at this time is displayed on the section display so that the faulty section can be known, and the switch that closes the faulty section is locked at this time, and the other section switches are automatically reset after a certain time limit, so that the healthy section can be detected. is being brought to life.

However, in the past, once the switch was locked as mentioned above, after the failure was recovered, one had to go to the location where the switch was installed and manually release the lock. I try to do that. For this reason, it was considered extremely troublesome to cancel it.

An object of the present invention is to facilitate the operation of unlocking a locked section switch by controlling transportation.

Embodiments of the invention will be described with reference to the drawings. 1st
The diagram shows the distribution line system diagram. The figure exemplifies a system in which power can be transmitted from feeders F ₁ and F ₂ from substations M ₁ and M ₂ , which are in different systems, to a failed section. CP is a normally open switch that connects both feeders. S ₁₁ , S ₁₂ ... S ₂₁ , S ₂₂ ... are section switches connected to each feeder, CB ₁ , CB ₂
is a switch at a substation. Each section switch is equipped with a control device CM, and a timed control device of the control device CM causes timed operations and memory operations for fault detection to be carried out. This timed control device is of a well-known construction.

The above configuration is not particularly different from the conventional one, but
According to this invention, a structure for controlling the conveyance of each section switch is added. That is, a master station PC for transportation is prepared at the business office (or substation) P.
The master station PC has a transmitter for transmitting carrier signals.
TM, a bank switching device BC that determines from which feeder this carrier signal is sent, and a device for creating a carrier signal and deciphering a received signal. This device is, for example, a computer
Consists of CPU, operation console TB, etc.

This carrier signal is generated, for example, by a computer CPU in binary code. To this end, a multi-bit binary code is used to designate each bank, section switch, etc., and to issue a command to turn the switch on or off. Here, a binary code is created with bit 1 as a 207 Hz signal and bit 0 as a 227 Hz signal.

The control device CM of each section switch decodes the carrier signal and turns on or off the section switch according to the command. In addition, the display of the on/off state of the sectional switch is expressed by the above-mentioned binary code by the control device CM, which is transmitted to the master station.
Transmit to PC. Its transmission is through feeder FF ₁ ,
One of F ₂ (feeder that does not include the fault section)
It is carried out after. Then, the output of the current transformer CT ₁ or CT ₂ is received by the receiving equipment RC, and the computer CPU
send to The computer CPU decodes this received signal and detects which switch is on or off. SC is a control circuit that controls opening and closing of the sectional switch.

The above explanation was only about on/off control or display of the status of each section switch, but in reality, when carrying out conveyance control, control of the section switch by the timed control device is disabled. In addition to the necessity, based on the spirit of the present invention, it is necessary to release the lock of the section switch once it has been locked by means of conveyance control. The configuration and operation for this will be explained below.

Figure 2 shows each section switch S and its control device CM. The control device CM is equipped with the above-mentioned time-limited control device TM and a slave station CC for transport control.
Transformers TR ₁ and TR ₂ are connected to both sides of the sectional switch S, and no matter which feeder receives power,
I am ready to respond to this. This voltage is given to the time-limited control device TM, and when the power is retransmitted to the distribution line that has temporarily lost power in the event of an accident, as in the past,
Performs control to close the section switch at a fixed time limit and lock control when closing the faulty section. Specifically, a DC voltage is applied between terminals P and N by a timer or the like that operates when a predetermined time has elapsed, and this voltage is applied to the closing coil CW via the normally closed contact of the switching contact tc. given and energize it. In order to release the switch once it has been locked, all that is required is to energize the release relay RX. For this excitation, a manual switch SW for return is provided as in the past. When the switch is closed by the closing coil CW, the auxiliary contact CW is turned on.

Note that this time-limited control device TM is equipped with a contact rc that is turned on when the switch is locked due to the fault section being closed. It can be understood that the switch is locked by turning on this contact. In addition, when power is supplied from different systems, consideration is given to prevent the switch from closing if there is a risk of cross current flowing due to phase differences, for example (generally called collision prevention). The vehicle is equipped with a contact Y that is turned on when collision prevention measures are taken. This contact is connected in parallel to contact rc.

Either auxiliary relay A or B operates depending on the secondary voltage of transformers TR ₁ and TR ₂ . a and b are contacts of auxiliary relays A and B. No matter which auxiliary relay operates, it is self-held by its own contacts and power is supplied to the transformer TR. 2 of this transformer
The next voltage is used as a power source for the carrier control slave station CC.

The carrier signal from the master station is connected to transformer TR ₁ or TR ₂ .
The signal is applied to the filter FL of the receiver RV via TR. Here, a predetermined frequency (frequency constituting a bit) is taken out, amplified by an amplifier _AM1 , and then sent to a control unit _CV1 . Here, the carrier signal is decoded to detect the start or end of carrier control and commands for on/off control of the switch. When transport control is started based on this detection result, _relay
Also, when the conveyance control is completed, relay _X2 is activated. When the switch should be turned on, relay _X3 is operated, and when it is to be turned off, relay _X4 is operated. x ₁ to _{x 4} are contacts of relays X ₁ to _{X 4} .

When relay _X1 operates, auxiliary relay TC operates by turning on its contact _x1 . Then contact tc
At the same time, the input coil CW is disconnected from the terminals P and N, and switched to the DC output terminal side of the rectifier RE on the secondary side of the transformer TR. In other words, as a result of this, the closing coil CW was separated from the time-limited control, and from now on, it was controlled by the conveyance control. When the relay _X2 operates, the contact _x2 disconnects the closing coil CW from the conveyance control, and henceforth the control is based on time-limited control.

Note that, from the viewpoint of the purpose of the present invention, it is not necessary to switch the closing coil CW by the operation of the auxiliary relay during conveyance control to lock closing by time-limited control.

However, from an actual operational point of view, for example, there are cases where the operation is performed using conveyance control without automatic control using a timed control device, but in this case, depending on how the conveyance control device is controlled, the input command from the timed control device may Since it is necessary to lock the time control device so that it is not affected by this command, the closing coil CW is switched by the contact tc of the auxiliary relay TC as shown in Fig. 2.

When relay X ₃ operates while relay X 1 is operating, auxiliary relay CZ is operated by its _{contact x 3 .} Then, it is self-held by the contact cz, and the DC voltage from the rectifier RE is supplied to the closing coil CW. This causes the closing coil CW
is energized, and the section switch S is turned on. When this is turned on, auxiliary contact cw is turned on, so auxiliary relay Z operates and its contact z ₁ ,
z ₂ is turned on. When relay _X4 operates, auxiliary relay CZ is reset by its contact _x4 . As a result, the excitation of the closing coil CW is cut off, and the section switch S is opened.

When both auxiliary relays TC and CZ enter the operating state, that is, transfer control is entered, and the closing coil
When CW is turned on, both auxiliary relays TC and CZ
Both contacts are turned on, so manual switch
SW is shorted. That is, by operating the release relay RX, the lock of the section switch S by the time-limited control device is released. Therefore, if a failure occurs from now on,
The sectional switch is closed according to a predetermined time limit by the time control device without any hindrance.

The status of the switch and other necessary information are transmitted to the master station. A transmitter _TM1 is prepared for this transmission. This is composed of a control section CV ₂ , an amplifier AM ₂ and a coupler K. Control unit CV ₂ indicates that the transfer control has been started by turning on contact tc, that the switch has been turned on by turning on contact x ₁ , and that contact Y
Or, the information that collision prevention or accident lock has been achieved by rc is given respectively. Control part CV ₂
Now code this information together with the address of your own switch. And add this to the amplifier AM ₂ ,
The signal is sent to the feeder via a coupler K and transformers TR, TR ₁ (or TR ₂ ). The information sent is current transformer CT ₁
Or sent from CT ₂ to the master station. The master station decodes this and displays the necessary information. The ₂ contacts are used for self-holding of the sectional switch in timed control and for displaying a lamp in the event of an accident lock. Therefore, when switching from remote control to time control, the sectional switch is immediately closed and held.

As described in detail above, according to the present invention, a timed control device is used to detect a faulty section of a distribution line, eliminate the faulty section, and supply power to a healthy section. The release is carried out using conveyor control, so in order to release the lock,
In addition to completely eliminating the need to go to the site, when shifting to transport control, timed control is locked and priority is given to transport control, and when a switch is turned on by transport control, the switch Since the previous lock is released, conveyor control can be executed reliably, and subsequent failure sections can be detected without any problems.Furthermore, the conveyor control system can be used to open/close. Turn on the device,
The off state or lock state can be easily transmitted to the master station, and the master station can easily display the information.

[Brief explanation of drawings]

FIG. 1 shows a distribution line showing an embodiment of the present invention, and FIG.
The figure is a wiring diagram showing a control device for a sectional switch. S, S ₁₁ , S ₁₂ , S ₂₁ , S ₂₂ ... section switch, CM
...control device, SC ...section switch control circuit, PC
...Master station, TM...Time control device, CC...Slave station for transport control, TC, CZ, Z...Auxiliary relay, X ₁ ~
X ₄ ...Relay, RV...Receiving section, TM ₁ ...Transmitting section.

Claims (1)

[Scope of Claims] 1. A time control device for closing a sectional switch for a certain time when retransmitting power to a distribution line that has been temporarily cut off in the event of an accident, and a transportation device installed at a business office or substation. A transport control slave station that controls the opening and closing of the compartment switch according to a carrier signal from a master station is installed in each division switch, and the transport control slave station includes a controller for receiving the carrier signal. , a filter for extracting a signal applied to its own station from among the carrier signals, and a first filter for decoding and detecting commands for starting and ending carrier control, and on and off control of section switches from signals extracted by the filter. a receiving section consisting of a control section; and a section opening/closing section that operates in response to a transport control start command from the receiving section and a command indicating that transport control is in progress, and a section switch ON control command from the receiving section. a device for releasing the sectional switch closing lock state when a faulty section is closed by re-closing the sectional switch by the device of the time control device according to a device closing command; a second code for encoding signals indicative of the open/closed state and signals indicative of the lock state, for transmitting the state and the lock state of the sectional switch closed by the time control device to the master station;
A control device for a sectional switch for a distribution line, comprising: a control section; and a transmission section comprising a coupler that transmits the output of the second control section.