JPH03103001A - Operating section display and diagnostic display for ground primary liner motor coil system - Google Patents

Abstract

PURPOSE:To enable continuous central monitoring of the operating condition and fault in a conducting circuit by displaying all unit sections, each of which represents a linear motor coil conducting circuit, for each phase and enabling sequential display of the conducting section through switching thereof. CONSTITUTION:Through type current transformers(CT3, CT4) for catching the current flowing through each unit conducting section of a linear motor car coil system and through type current transformers (CT1, CT2) for detecting the fault are provided, and information is provided from the current transformers through a transmitter 7 to a central control room thus displaying the entire conducting condition on a cathode ray tube(CRT) 10. The CRT 10 displays the arrangement of the conducting sections of the linear motor car system, the conducting sections and the range of faulty coil with different colors.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to an operation display device and a failure diagnosis display device for an energized section of a linear motor car coil system. [Issues to be Solved by the Prior Art and the Invention Conventionally, train operation display systems, etc. have been used;
A system for displaying the operation of ground coils in linear motor car coil systems does not yet exist. In addition, a system that superimposes a failure indication on top of this has also been proposed, but little is known about it. Since a large number of ground primary linear motor coils are installed in series over a long distance on the rail, it is important to maintain them. The present invention has been made in view of the above points, and an object of the present invention is to provide a device that can constantly centrally monitor the operational status and failures of a linear motor coil group and its energizing circuit. [Means for Solving the Problems] This invention uses a through-type current transformer (CT) that catches the energized current for each energized section, and a through-type current transformer (CT) that detects a failure, in units of energized sections of the Lini 7 motor car coil system. A current transformer (CT) is installed, and the information is guided to the central control room by a transmission device, and the whole is connected to a cathode ray tube (CRT).
to be displayed. Instead of the once-through current transformer (CT), it is also possible to use other current sensors or voltage sensors that detect the applied voltage. The CRT displays the arrangement of the energized sections of the linear motor car coil system, and the energized sections and faulty coil ranges in different colors. In particular, the method of grounding the connecting cable and the arrangement of the feedthrough current transformer (CT) are novel features of this invention. [Examples] Examples of the present invention will be described below based on the drawings. 1st
Figure (A) is a conceptual diagram for explaining a device that displays the energization state of the energized section of the linear motor car coil system. That is, a large number of consecutive linear motor coils 1 form energized sections A, B, . . . , N, respectively. These energized sections are, for example, in units of several hundred meters. A connecting cable or energizing cable 2 connecting the linear motor coils 1, 1, . A ground bus bar 3 is provided in parallel with this connection cable 2, and both ends thereof are grounded. From this ground bus 3, a ground wire 4 is connected to each linear motor coil 1 so as to ground the metal shield of the connection cable 2. The connection cables 2 at both ends of the current-carrying circuit for each phase are connected to feedthrough current transformers CT. ，
CT. These feedthrough current transformers CT
．． , CT2 (CT2 may be omitted) are each connected to a corona current or fault current detection/judgment circuit via a filter circuit (not shown). In addition, through-type current transformers CTi and C are also connected to the ground ends on both sides of the connection bus bar 3.
T4 is installed, and both ends of the ground bus 3 are inserted. Although Fig. 1 shows a single-phase current-carrying circuit, in the case of a multi-phase system, the current-carrying cable 2 does not return and connects to the ground circuit of the feeder line at the far end. Since the linear motor coil 1 has a high resistance external shield, it can be considered that the metal shield of the connection cable 2 is broken at the coil terminal. Note that if the coil has a metal shield, it will be connected to only one side of the connection cable. Now, when a voltage is applied to the current carrying circuit configured in this way, a current flows, and this flows through the feedthrough current transformers CT+ and CT.
It is caught by a and the output appears. Current current is caught for each phase. This output is input to a detection circuit 6 as shown in FIG. 2, and output to a transmission device 7 via a metal or optical fiber signal line 8a. This is the action display signal. This is led to the central monitoring room for each energized section unit A, B, . . . , N, so that the energization status of each section can be constantly monitored.

On the other hand, if the linear motor coil 1 or the connection cable 2 breaks down at point X in Figure 1(B), the current flows from the metal shield of the connection cable 2 at the break point through the ground wire 4 as shown by the arrow. Flows to the ground bus 3, is transmitted to the left and right, and passes through the through-type current transformer CT. and C T a . Therefore, the outputs of the through-type current flow devices CTs and CT4 are detected and are also immediately sent to the transmission device 7 via the signal line 8b in FIG. At this time, it is possible to roughly estimate which location in the energized section the cable has failed based on the difference in arrival time to the transmission device 7. Then, the output of the transmission device 7 for the entire section is transmitted to the display control device 9 in the central control room.
data is collected in the CRTIO, displayed on the CRTIO, and monitored in one place. Optical fibers that are not affected by noise are considered suitable for transmitting signals to the display control device 9. Next, an example of a CRT display will be explained based on FIG.
FIG. 3 is a diagram for explaining the entire section display screen, and the number of phases of the left linear motor coil L is, for example, I, I.
There are three phases, I and III, and the number of phases of the right side near motor coil L is three, I', II', and III', and each phase is made up of two layers because of duplication.

In addition, the linear motor coils stand on the walls on both sides of the track. The total number of sections is N sections, and in the example of Fig. 3, the display of all sections is, for example, yellow, and if the first and second sections I and I' are energized, the display is, for example, It will turn green and be displayed. Red indicates the faulty near-motor coil, and the location of the faulty coil can be indicated by enlarging only one section of section a as shown in Figure 4. In FIG. 4, it can be seen that, for example, the 100th linear motor coil in the second layer of the II' phase of the right side coil is out of order.

Note that the CT shown in FIG. 1(B). , Since the determination of the fault location by CT4 is affected by the displacement current flowing through the connecting cable 2 due to the voltage applied to the coil, it may be difficult to catch the fault current. In order to accurately catch the fault current, it is desirable to have a method that can completely eliminate the influence of the current flowing through the coil, and for example, the method shown in Figure 5 can be considered. That is, CTs. C
T. ' are inserted, and their secondary windings are connected in series with each other reversed and put into the detection circuit 11. In this way, the current flowing through the coil will be canceled and the current flowing to ground will be detected when one of the cables fails.
Separately, one transmission signal line 12 is laid in the energized section, and the output of the detection circuit 11 is placed on this signal line 12, and the operating CT is determined based on the difference in arrival time to the receiving circuit 13 at both ends of the signal line. Ru. The output of the receiving circuit 13 is also sent to the transmission device 7 as shown in FIG. 2, and is summarized by the display control device 9. Here c'rs, CT. ' will be inserted every other coil.

[Effects of the Invention] As explained above, according to the operating section display and failure diagnosis device for the ground primary type linear motor coil system of the present invention, ■ Regarding the ground primary type linear motor coil energization circuit, each phase is We invented a device that can display all sections at each time, and display sections that are energized one after another by switching the energized sections. This invention is the first of its kind for this system. ■By inserting a feedthrough current transformer (CT) into the ground bus, it is possible to detect and display the faulty section of the linear motor coil and cable. Another new invention of this invention is a device that estimates and displays the location of a faulty cable.

■The device of this invention consists of one or two feedthrough current transformers (CT) per phase, two on the ground bus, and one simple transmission device.
Since it is only necessary to install one in each energized section, the operating section of the ground primary linear motor coil system is significantly lower cost than a system that uses a feedthrough current transformer (CT) for each linear motor coil. It serves as a display device and failure diagnosis device. (2) It is possible to display the operation of the present invention by using another sensor instead of the feedthrough current transformer (CT).

[Brief explanation of drawings]

Figures 1 (A) and (B) are circuit diagrams for explaining the energization status of the energized section and failure detection, and Figure 2 is a block diagram for displaying the energization status and failure status of the energized section on a display device. Figure 3 is a diagram for explaining the entire section display screen of the display device; Figure 4 is a diagram for explaining an example of an enlarged display page displaying a part of Figure 3; FIG. 5(A) is a circuit diagram showing another method of failure detection, and FIG. 5(B) is a circuit diagram showing an example of connection of CTs and CTs'. 1... Linear motor coil 2... Connection cable 3... Ground bus bar 4... Cable sheath ground wire 5... Section energization switch 6... Detection circuit 7... Transmission device 8...・Signal line 9... Display control device 10... Cathode ray tube (CRT) L1... Detection circuit 12... Transmission signal line l3... Receiving circuit CTI to CTS, CTs or other current or Voltage sensor...through type current transformer)

Claims (1)

[Claims] The energized section of the coil group for the ground primary linear motor is used as a display unit, and all energized sections are simultaneously displayed on one or more cathode ray tubes (CRTs), and the sections in which the energized operation is being switched are displayed in different ways. Insulation deterioration or breakdown of coils and connecting cables, as well as their disconnection, can be detected by feedthrough current transformers or other current or voltage sensors, with the fault section marked in a different color than before. An operating range display device and a fault diagnosis display device for a ground primary linear motor coil system with fixed display.