JPS63261636A - Switch 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 [Field of Industrial Application] The present invention relates to a switching control device that controls a switching device including a plurality of switches.

[Prior Art] The general configuration of a switchgear is shown in FIG. 2, in which a plurality of downstream switches 2 are connected to - upstream switches 1. When an accident occurs at any feeder 7, the corresponding downstream switch 2 opens, and when an accident occurs at the @ line 3, the upstream switch 1 opens.

[Problem that the invention attempts to solve] Conventional opening/closing control devices have the following problems.

Among the accidents that occur in the feeder 7, a small number of accidents become an open condition that causes a high re-electromotive voltage.

Therefore, the downstream switch 2 must have the ability to open even in such rare and severe accidents. A performance switch had to be used. This has led to problems in that the device becomes large and expensive.

An object of the present invention is to solve the above problems and provide an opening/closing control device that can reduce the size and cost of the entire device.

[Means for Solving the Problems] In the switching control device according to the present invention, in the event of an accident in which the downstream switch cannot be opened, both the upstream switch and the downstream switch are opened, and the circuit abnormality is prevented. It is equipped with a load-side failure determination means that re-opens the upstream switch on the condition of removal.

[Function] If an accident occurs in which the restart voltage or recovery voltage is abnormally high and cannot be opened by the downstream switch alone, the load side failure determination means is the downstream switch control means and the upstream switch control. Both means are operated to open both the downstream switch and the upstream switch.

[Embodiment] The configuration of a switching control device according to an embodiment of the present invention is shown in FIG. 1, which includes a load-side switch control device 5 as a downstream switch control means and an upstream switch control device as an upstream switch control means. The connections of the switches controlled by the device control device ri16 are shown in FIG. 32 (for example, a vacuum switch) is connected. When an accident occurs in any of the feeders 7, the load-side failure determination device 4 detects the voltage and current of the circuit, and if the downstream switch 52 can be opened independently, sends a signal to the load-side switch control device 5. give.

The load-side switch control device 5 receives this signal and opens the downstream switch 2 where the accident occurred.

Further, in a case where the re-electromotive voltage becomes high as in the case of a short-range short-circuit failure, and when the downstream switch 2 alone cannot be opened, both the downstream and upstream switches 1 and 2 are opened.

As a result, the opening capacity becomes the sum of the capacities of switch 1 and switch 2.

Furthermore, the load-side fault determination device 4 causes the upstream switch control device 6 to re-close the upstream switch 1 on the condition that the load-side fault is removed. As a result, power supply is restarted to the normal feeder 7 in which no accident has occurred.

In the above embodiment, the upstream switch 1 is a high distance re-opening type gas switch, and the downstream switch 2 is a vacuum switch.

However, in other embodiments, both may use general-purpose switches.

In still other embodiments, a gas breaker may be used as the upstream switch 1, and a vacuum breaker may be used as the downstream switch 2. In this case, the restart voltage characteristics after opening of the gas breaker may be used. The stable and excellent characteristics and the excellent opening characteristics of the vacuum breaker can be effectively utilized.

[Effects of the Invention] The switching control device according to the present invention includes load-side failure determination means that opens both the upstream and downstream switches in the event of an accident in which the downstream switch cannot be opened. Therefore, the opening capability of the switchgear is the sum of the capabilities of the upstream switch and the downstream switch. That is, the capacity of each switch may be smaller than that of the conventional one, and the device can be made smaller.

[Brief explanation of the drawing]

FIG. 1 is a block diagram showing the configuration of an opening/closing control device according to an embodiment of the present invention, and FIG. 2 is a block diagram showing the configuration of a general opening/closing device. Note that the same reference numerals in each figure indicate the same or corresponding parts.

Claims (2)

[Claims] (1) Downstream switch control means that sends opening/closing signals to the downstream switch; upstream switch control means that sends opening/closing signals to the upstream switch; In this case, the downstream switch control means is operated to open the downstream switch, and if the downstream switch cannot be opened due to an accident, both the downstream switch control means and the upstream switch control means are operated. A switching control device comprising load-side failure determination means for opening a downstream switch and an upstream switch, and re-opening the upstream switch on condition that a circuit abnormality is removed. (2) The switching control device according to claim 1, wherein the upstream switch is a gas switch, and the downstream switch is a vacuum switch.