JPS5999931A - Interlock controlling method of bus zone interrupter in switching facility of auxiiliary bus type - 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 an interlock control method for a busbar divider in which it is possible to systematically determine whether or not the busbar divider can be opened or closed in an auxiliary four-wire system.

Auxiliary busbar type switchgear equipment, as shown in the skeleton diagram of Figure 1, is widely adopted in substations, etc. to reduce the need for electrical equipment such as circuit breakers and disconnectors, and to effectively perform uninterruptible power transmission. As demand increases, the busbar section circuit breaker 51 is connected together with the busbar section circuit breaker 41, and...
We are making it possible to add more.

However, the busbar section disconnectors installed in this way are also the auxiliary busbar disconnectors 5 in other banks C1, C2, and so on.
Similarly, when the need for such operation arises, it is important to be able to operate it in a safe manner at all times.

Therefore, the conditions for whether or not the busbar section switch 51 to be operated can be operated are systematically judged in the auxiliary bus system switching equipment, and based on the judgment result, the busbar section switch 51... There was a strong desire to be able to interlock...

The method of the present invention was developed by the government in view of the above circumstances, and combines interlock devices A, . By using this system, it is possible to systematically judge whether or not the busbar section switch can be opened or closed, and the interlock of the busbar section switch can be released only when the operable conditions are met. An interlock control method is provided.

Below, the unexploded t51J method will be described with reference to its preferred embodiment.

First, to explain the interlock device for the bus line section switch, Δ, the detailed configuration of this device is as follows: An auxiliary contact 81 for a busbar section circuit breaker and an auxiliary contact for a disconnection line 1z circuit breaker, 71, which are operated in accordance with the opening and closing operations of the inspection contact 6, the corresponding busbar section circuit breaker, and the busbar section circuit breaker. The signal line AI provided according to the operable conditions in each bank set in advance,
A pair of condition determination relays 91'a and 91'J-93' operate only when a current-carrying path is formed between Bl and C1 to release the interlock of the busbar section disconnector.
a, 93'b, and the configuration of a specific embodiment thereof is as shown in FIG.

Also, an interlock device B1 for auxiliary line disconnectors provided corresponding to the auxiliary bus line disconnectors in each bank;
, similarly, an inspection contact 6', an auxiliary contact 8' for the auxiliary bus disconnector, an auxiliary contact 7' for the circuit breaker, and a condition determination relay that is activated when an operable condition is established to interlock the busbar section disconnector. 9]-' to 94', and the configuration of a specific embodiment thereof is shown in FIG.

Next, the conditions for releasing the interlock required for the development of the method of the present invention, that is, the conditions for operating the busbar section disconnector will be explained.

Similarly to general disconnectors, busbar section disconnectors cannot directly switch on or off the load current. Therefore, as a result of applying such conditions to the auxiliary bus system as shown in FIG. 12, the following three conditions (a) to (C) are required.

That is, the first condition (a) is the case where both ends of the busbar section circuit switch are connected to the same power supply main busbar, and if this is considered in units of left and right banks b, 9, as shown in Fig. 4a, For example, if 51 is the busbar section circuit breaker to be operated, the busbar section circuit breaker 41 corresponding to this section switch 517 and 51 is turned on, and at least one circuit is connected in each of the banks on both sides. (3)", (■"The above is the circuit breaker (heart, C4) l,
This is the case when the auxiliary bus disconnector (■l, (:B)l is in the closed state (see Table 1a).

Next, the second condition (b)-1, when looking at either the left or right bank from the busbar section disconnector to be operated, is the disconnector in that bank in an open state, or is the disconnector in the open state? If the connected circuit breaker is open and the power supply line is not connected to this circuit breaker or is occupied, if this is specifically applied to the auxiliary bus system, the fourth
If all of the auxiliary bus disconnectors ■1... on either the left or right side are in the open state as shown in Figure b1, or if either the left or right side Regarding all of the auxiliary bus disconnectors (U1...) in bank 5.9, the circuit breaker ■1... connected to this is open,
Moreover, if the power supply lines are not connected to all of the auxiliary bus disconnectors (1), as shown in FIG. 4b-3, 6- either the left or right bank c1. 4b written twice in c2
Figure-1 and Figure 41) This is a case where the lines shown in Figure-2 are mixed (see Table 1b).

The third and final condition (c) is when there is no voltage on both sides of the disconnector, and if we apply the same to the auxiliary bus system, the left and right bank C will be reduced as shown in Figure 4c. ，
, C2, the line breaker 4I of each line is open,
In addition, the auxiliary bus disconnector 51 of the line is closed, or the auxiliary bus disconnector 51 is open (see Table 1-c).

1st] - Table a - 1st] Table b - 1st] - Table c - Next, the procedure and operating principle of the method of the present invention will be explained.

The method of the present invention is carried out using a combination of an interlock device for a busbar section disconnector and an interlock device B for an auxiliary busbar disconnector.
Wire as shown in the figure.

That is, the terminals of each interlock group JA, , and g are connected in parallel with each other, and the Pl and P2 terminals are connected in series with each other, and B1, B2 + CI, and 02 are connected in parallel.
The wires are connected in series with each other and then circulated from the end to the start, and each bank has 3 wires.
In the case where there are two auxiliary disconnectors, the wiring is connected as shown in FIG.

After completing the wiring as shown in FIG. 5, the interlock device for the busbar section switch, inspection contact 61
In this case, if any one of the operable conditions (a) to (c) above is satisfied, then the following operation will occur: According to the principle, the interlock of the disconnect line switch will be released.

If) If condition (a) is met, line breaker ■
1. ■Since both of 1 are in the closed state as shown in Figure 4a, for the interlock device for the auxiliary bus disconnector, S/a of the auxiliary contact 8' for the auxiliary bus disconnector is in the closed state, and for the line breaker Since the 7'a side of the auxiliary contact 7' is in a closed state, both latch relays AX' and CX' are activated and their contacts AXl+cXl are closed, so P (+).

An electric path AX,'→X(→cX1→A is formed).

At this time, when the interlock device A for one busbar section switch is turned on, its inspection contact 61 is closed, and the contact X1' + X3) is closed and relay 91'a is activated.
is the interlock device for the auxiliary bus disconnector that satisfies the operable conditions for left bank h, and from the A terminal of B, relay 9 is connected.
] 1b satisfies the operable condition of the right bank c2 and the auxiliary bus disconnector interlock device is energized from the A terminal Jl, the busbar segment circuit breaker.

As a result, the excitation coil]-〇l is excited and the interlock of the bus section disconnector is often released.

When the condition (b) is met, the s/b side of the auxiliary bus disconnector auxiliary contact 8' of the auxiliary bus disconnector interlock device p, VC corresponding to the open line of the auxiliary bus disconnector is in the closed state. , so latch relay AXR' is activated [2 and AX'4 is closed, and at the same time, test contact 6' is not operated, so X11' remains closed.

As a result, an electric path B1→AX'4→XII→B2 is formed in each interlock device B in Bank Town.

Okay, the circuit breaker connected to the auxiliary bus disconnect switch is opened.
In addition, regarding interlock devices t and B that correspond to lines to which no feeder line is connected to this disconnector, the eave 1) side of the auxiliary contact 7' for the circuit breaker is in the closed state.
Latch relay CXR,' is operated to keep Cx2' closed, and since test contact 6' is not operated at the same time, X4' + x11' + XI+ is kept closed.

At this time, short feeds are made in advance for ■ and ■ (this short feed operation is performed by each interlock device B).

If sensor means capable of detecting the presence or absence of a power supply line is added to the bank C1, this can be done automatically.
X;→■→■→CX2->X≦→X,;-,-> 13
□ Since an electric path will be formed, the distance between devices p is B2.
→Bl+B2→B・Connect with B, →B1]
, an electric path is formed.

At this time, the interlock device 45 for one busbar section circuit breaker can be in either the closed or open state of the busbar section breaker, so if the contact 61 is closed now, the relay x1 will be activated, and the contact x4 will be activated. Close P→X4-)B,
Supply power to the device from the VC,” - written (1)
) is detected and Bl→f3 +X6L92a'→N
An electric path is formed, the contact BL is closed, the excitation coil 10' is energized, and the interlock of the busbar section disconnector is released.'F1. That will happen.

Also, for the 9 banks on the right side, 92b is operated using the same principle of operation.
It will be easily understood that when the contact BL2 is activated and the contact BL2 is changed, the interlock of the busbar section disconnector is released.

If the condition (c) is met, the color of the interlock device for the auxiliary bus disconnector in S/b is 0.
It must be occupied either when the line breaker is open and the auxiliary disconnector is closed, or when the auxiliary disconnector is open.

Therefore, considering each case, in case (2), since the auxiliary bus disconnector auxiliary contact 8' in the bank is in a closed state, the latch relay AX' is activated and its contact Ax2 is closed.

At the same time, since the line breaker auxiliary contact 7 is closed on the '7b side, the latch relays CX and R' operate 1 to 1, and the contact CX3 remains closed. Furthermore, when this interlock device B7 is inspected and supplied, (this short supply operation can also be automatically operated if a sensor means that can detect the presence or absence of reverse charging is added to each ink lock device! 3). From these results, CI-+X → AX1 → CX/3-O → ■ → x14''k Since the 8b side of 8 where the electric circuit C2 is formed is closed, the latch relay has AXR. When actuated, its contact AX3' remains closed.

In addition, at this time, the inspection contact 6' is not operated, and therefore the relay
An electric path of X,/4→C2 is formed.

On the other hand, as for the interlock device A of the other busbar section disconnector, its inspection switch 6 is
When 1 is operated, relay X" is activated and its contact X12'
Close p −+ xl, '→C1 to connect device B1. It detects that all the lines in bank C1 are in the ■ or @ state and satisfies the condition (C), and switches CI→C.
An electric path -1-X, 4' → 932' → N is formed, and CL is closed. Further, in bank b, 93b1 is operated according to the same principle of operation, and its contact CL2 is closed, so that the excitation coil 1σ is energized and the intercock of the busbar section disconnector is released.

As can be understood from the above explanation, the interlock control method of the present invention can provide an interlock control method for busbar section switches in switching equipment of the auxiliary busbar type.

[Brief explanation of drawings]

Figure 1 is a skeleton diagram showing an example of switching equipment using the auxiliary blade line method, Figure 2 is a diagram showing the detailed configuration of the interlock device for the busbar section disconnector, and Figure 3 is the interlock for the auxiliary busbar disconnector. The system is a diagram showing an example of the wiring connection between the busbar section disconnector [+1 interlock device and the auxiliary line disconnector interlock device, which are necessary when implementing the unexploded EJ1 method. (Code change January) 1 Main Lυ" line, 2 - Auxiliary fJ line, 3... Power supply line, 4 Line breaker, 5... Auxiliary bus disconnector, 'A,
Interlock device for busbar section circuit switch, 6... contact for inspection, ? ...Auxiliary contact for bus section circuit breaker, 8...Auxiliary contact for bus section circuit breaker, 91a, 9l-93a, 93
b...Condition judgment relay, CI+C2...Distribution line bank,
B: Auxiliary blade, line disconnector interlock device, 6°...
Inspection contact, 7I...Auxiliary contact for line breaker, 3'...Auxiliary bus disconnector contact, 9]'~94'...Condition judgment relay. Figure 3 p Figure 2 Procedure amendment (method) ) Patent Application No. 1989-892 2, Title of the invention 3, Relationship with the case of the person making the amendment Poetry applicant 4, Agent 5, Date of amendment order 1 March 29, 1986 (shipment date) ) 6. Column for a brief explanation of the drawings in the specification subject to amendment (1) Column for a brief explanation of the drawings @: 9iqx Page 6, line 3 - line 4 of the same page "No.
4C are explanatory diagrams of the operable conditions of the busbar section circuit switch" has been corrected as follows. [-Figure 4a is a diagram schematically showing the first operable condition of the busbar section switch, and Figure 4b-1 is the first example under the same second operable condition. Fig. 4b-2 is a diagram schematically showing a second example under the second operable condition, and Fig. 4b-3 is a diagram schematically showing the second example under the second operable condition. Figure 4c, a diagram schematically showing the third example of the operable condition, is a diagram schematically showing the third example of the operable condition.

Claims (1)

[Scope of Claims] A bus bar section disconnector that connects each bank to a plurality of auxiliary line disconnector interlock devices provided corresponding to each of the auxiliary bus disconnectors in each bank of auxiliary bus type switchgear equipment. 1. A method for systematically performing interlock control of busbar section circuit switches by connecting interlock devices for busbar section circuit switches provided corresponding to the busbar section circuit switches, the method comprising: The device is (-)
(1)) An auxiliary contact for the auxiliary bus section switch that is operated to open or close in response to the opening/closing operation of the corresponding auxiliary bus section switch. (C) an auxiliary contact for a four-wire section breaker that opens and closes in response to the opening and closing operations of the corresponding bus section breaker, and (d)
6. A plurality of condition determination relays that are activated when a conductive path is formed between the signal lines provided according to the operable conditions, and release the interlock of the busbar section disconnector. An interlock control method for a busbar section circuit switch in an auxiliary busbar type switchgear equipment, characterized by comprising the following.