JPH0138335B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a disconnector operating device that remotely controls a disconnector installed in a power system from a control center via a signal transmission device and an on-site interlock device.

Generally, when controlling a disconnector installed in a power system remotely from a control center, the control signal is transmitted to the installation site of the disconnector via a signal transmission device, and the signal is transmitted to the site immediately before inputting the signal to the disconnector. An interlock device is used to confirm the validity of the operation and to prevent operator errors.

FIG. 1 is a block diagram of such a conventional disconnect switch operating device, in which A is a control console on the control center side, B is a signal transmission device, C is a local interlock device provided on the controlled side, and D is a The disconnector to be operated, a is the control signal, b is the open/close information signal indicating the open/close state of the target disconnector D, and c is the interlock information representing the open/close information of other switches required for interlock. .

In this configuration, when control signal a is output by operating console A, this signal is sent to local interlock device C through signal transmission device B. The on-site interlock device C verifies the validity of the control signal a based on the opening/closing information signal b and the interlock information c, and if it is determined to be good, it gives the control signal a to the disconnector D. . The result is fed back to the console A via the signal transmission device B as an open/close information signal b indicating the open/close state of the disconnector D.

However, according to such a configuration, if the disconnector D does not operate according to the operator's command, this can be confirmed on the operation console A based on the information signal b, but on the other hand, the cause of the failure is the signal transmission. Is it due to a defect in device B, a malfunction in disconnector D, or a malfunction due to an interlock error in local interlock device C?
There is a problem in that the operator cannot judge or know about this.

Therefore, an object of the present invention is to eliminate the drawbacks of the prior art described above, and to make it possible to display an alarm in response to an erroneous operation, distinguishing it from a failure of a signal transmission device or a disconnector, thereby preventing an operator from performing an erroneous operation. It is an object of the present invention to provide a disconnector operating device which can be easily checked and which can prevent unnecessary exclusive use of a signal transmission device due to transmission of an operation signal due to an erroneous operation.

In order to achieve this object, the disconnector operation device of the present invention has a memory in the control center that stores system equipment information such as the installation position of the disconnector, its usage classification, and the interlock pattern for interlock determination. a determination unit that extracts only information corresponding to the control signal from the system equipment information stored in the storage unit based on the control signal, determines the system configuration, and outputs it as equipment information; a control center interlock device having an interlock determination section that determines the validity of an operation request based on equipment information from the determination section and switch opening/closing information necessary for interlock; is characterized in that it includes means for prohibiting transmission of the control signal to the signal transmission device and notifying the control center if the determination results that the signal is not valid.

Hereinafter, the present invention will be explained in more detail with reference to the drawings.

FIG. 2 is a block diagram of a disconnector operating device according to an embodiment of the present invention. to confirm the validity,
This is a control center interlock device provided on the control center side to apply an interlock if necessary and return an erroneous operation display signal d resulting from the interlock to the operator console A.

The detailed structure of the control center interlock device E shown in FIG. 2 is shown in the block diagram of FIG. 3. In the figure, E2 indicates the substation where all the disconnectors controlled by this operating device are installed, the installation location within the substation such as the Nth power transmission line outlet in the installed substation, and the location where the disconnector is located, for example, on the busbar side. A storage unit that encodes and stores system equipment information a4 such as usage classification such as a disconnector and an interlock pattern used for interlock determination in advance, and E3 stores system equipment information a4 and control signal a from the storage unit E2. The determination unit E4 determines the validity of the control signal based on the equipment information a5 and interlock information c from the determination unit E3, and if necessary, transmits the control signal a to the signal transmission device B. This is an interlock determination unit that prohibits the transmission of data. Note that the storage section E2
stores all kinds of equipment information a4 that is inevitably determined once the system equipment is determined, and when the control signal a is input, the determination unit E3 determines the following from among the information stored in the storage unit E2: Only the information corresponding to the control signal a is extracted and outputted as equipment information a5 to the interlock determination section E4.

In explaining the operation of the configurations shown in FIGS. 2 and 3, the operation of the disconnector used in the system configuration shown in FIG. 4 will be explained as an example. Figure 4 is a system configuration diagram showing an example of a substation.
is the busbar, LS1 and LS2 are the bus-side disconnectors for the power transmission line leading out to the busbar, LS3 is the line-side disconnector for the transmission line leading out to the busbar,
LS4 and LS5 are bus tie disconnectors, CB1 is a power transmission line breaker, and CB2 is a bus tie circuit breaker. Information regarding this system configuration and encoded information regarding the control signal a to be delivered to the signal transmission device B when operating each disconnector and each circuit breaker are stored in the storage section E2.

For example, if the operator is now using the disconnect switch from console A,
After confirming the open/close status of LS1 based on the open/close information signal b, if a request is made to operate the disconnector LS1,
The control signal a is input to the determination section E3 and the interlock determination section E4. The control signal a is an information signal in which the operating direction of turning on and off the disconnecting switch is encoded and added to coded information for specifying the disconnecting switch LS1 in the bus-side disconnecting switch of the substation shown in FIG.

Now, in the determination section E3 to which the control signal a is input, the system equipment information a stored in the storage section E2 is determined.
4, the information corresponding to the control signal a is extracted, and equipment information a5 of the disconnector LS1 to be operated is extracted.
It is output to the interlock determination section E4 as a signal.

The processing content in the determination unit E3 will be explained in more detail. A logic table as shown in FIG. 5 is stored inside the determination section E3. In FIG. 5, the column is the unique number of the interlock determination pattern, the column is the device to be controlled, the column is the target system to which the equipment type is applied, and the column is the logical expression showing the condition pattern for permitting control. Furthermore, CB10 is a power line breaker, CB
21, CB40, CB63 are bus tie breakers,
CB20, CB61, CB62, CB30 are circuit breakers,
LS10 is a line-side disconnect switch for the bus pull-out transmission line, LS
10 is the line-side disconnect switch for the bus pull-out transmission line, LE1
0 is transmission line ground, LS20, LS21, LS30,
LS52, LS51, LS60, LS61 are the bus side disconnectors of the bus pull-out feeder, LS22, LS23,
LS40, LS41, LS63, and LS64 are bus tie disconnectors, LS62 is a tie disconnector, LS50 is a bus section disconnector, and LS31 is a disconnector. Also, BS20, BS21, BS30, BS40, BS4
1. BS50, BS51, BS60, and BS70 are bus lines. LS51 & ETC means bus BS51
This means all the bus-side disconnectors (for example, bus-side disconnector LS51, etc.) connected to the bus. Similarly, LS52 & ETC means all bus-side disconnectors (for example, bus-side disconnector LS52, etc.) connected to bus BS50. moreover,
In the logical formula in the column, "." indicates logical product, and "+" indicates logical sum.

Now, assume that the control signal a for the bus-side disconnector LS1 is input to the control station interlock device E. When the control signal a is input to the determination unit E3 of the control center interlock device E, the determination unit E
3 is from the storage unit E2: (1) LS1 is a bus-side disconnector for the bus-output transmission line.

(2) The configuration of the power system including the bus-side disconnector LS1 is as shown in Fig. 4.

It is possible to obtain the system equipment information a4. Next, by comparing this system equipment information a4 with the contents of , in FIG. 5, the following determination results (a) to (c) can be obtained.

(a) The operation of the bus-side disconnector LS1 conforms to the unique number 2 of the interlock judgment pattern in Figure 5.

(b) LS1 corresponds to the bus-side disconnector LS20, similarly, LS2 corresponds to the bus-side disconnector LS21, CB2 corresponds to the bus tie circuit breaker CB21, LS4 corresponds to the bus-side disconnector LS22, and LS5 corresponds to the bus-side disconnector LS21. Each corresponds to the device LS23.

(c) Interlock conditions are determined from the unique number 2 column of the interlock judgment pattern in Figure 5.
"CB20 off and LS21 off, or CB2
1 on and LS22 on and LS23 on and LS
21 on”.

Based on the above (b) and (c), equipment information a5 to be output to the interlock determination section E4 is created. In other words, equipment information a5 applies the above-mentioned (c) to (b), and the conditions for determining the validity of the operation request for the bus-side disconnector LS1 are that the circuit breaker CB1 is off and the disconnector LS2 is off. or circuit breaker CB2
is on and the disconnectors LS4, LS5, LS2 are on. If this judgment condition is met, the operation request is deemed valid and the control signal a is transmitted to the signal transmission device B; if not, a transmission lock or interlock is applied.

The interlock determination section E4 to which the control signal a and the equipment information a5 are input makes an interlock determination using the interlock information c necessary for interlock.
That is, disconnectors LS2, LS4, LS5 and circuit breakers
This is performed based on the information regarding the open/closed states of CB1 and CB2, and if the interlock information c matches the interlock judgment pattern described earlier, that is, the condition (c) above, the disconnector is operated by this control signal a. Determine that it is legitimate.

As described above, the control signal a is transmitted to the local interlock device C via the signal transmission device B only after it is determined to be valid. The control signal approved by the control center interlock device E is again judged by the local interlock device C to determine whether or not it is an erroneous operation. In this case, the control signal a is the same except for the transmission failure of the signal transmission device B, so unless the judgment by the control center interlock device E is incorrect, it is permitted here as well, and the control target disconnector D, that is, the disconnector LS1 will be operated.

On the other hand, in the interlock determination section E4 of the control center interlock device E, the interlock information c is determined according to the interlock determination pattern, that is, the
If the condition (c) is not met, it is determined that the operation of the disconnector by this control signal a is not valid, and the control signal a is interlocked and not provided to the signal transmission device B. When the interlock is applied in this way, the erroneous operation display signal d is transferred from the interlock determination section E4 to the operator console A, and it is displayed on the operator console A that the erroneous operation signal has been input.

As described above, according to the configurations of FIGS. 2 and 3, when attempting to operate a disconnector in a system as shown in FIG. 4, for example, the control signal is transmitted to the disconnector side. It determines the correctness of the operation, sets an interlock if it is not correct, and if there is an erroneous operation, it is returned to the console and the operator is notified, so it is possible to distinguish between erroneous operations and non-operations due to other defects. In addition, it is possible to prevent the use of unnecessary signal transmission systems, and to improve reliability due to double interlock.

The control center interlock device E shown in Fig. 2 basically has the same function as the on-site interlock device C, and can be realized using well-known hardware. As the number of disconnectors to be controlled increases and the target power system expands, the hardware configuration becomes too complex and requires a large amount of installation space, making it uneconomical. This can be adequately addressed by introducing electronic computers that are mainly operated using software.

Regarding on-site interlock device C,
If there is no need to determine whether the signal transmission device is defective,
Since it has the same function as the control center interlock device E, it may be omitted.

The above-mentioned patterns for interlock determination set for the control center interlock device E are set by applying the equipment type to each determination pattern prepared in advance.

In that case, a determination pattern as shown in the explanatory diagram of FIG. 5 will be set, and based on this, an interlock condition for permitting control will be obtained. That is, in order to determine the interlock condition, the interlock condition is extracted from the equipment configuration according to the pattern shown in Figure 5, and the interlock condition is determined according to the interlock determination pattern for each disconnector to be operated. Interlock determination can be made based on this. In this case, if it is within the range achieved by the conventional on-site interlock device,
Of course, it can be extended to patterns other than those shown in the figure.

In addition, the open/close state information of the disconnector to be controlled is input to the interlock determination section, and if the operating direction of the disconnect switch and the open/close state are the same, that is, operation in the same direction is also determined to be a malfunction, and an interlock is applied. Good too.

As described above, according to the present invention, when remotely operating a disconnect switch, the operator is notified of the failure of the interlock of the disconnect switch due to an operator's erroneous operation, distinguishing it from failure due to other factors. This also makes it possible to apply an interlock before inputting the erroneous operation signal to the signal transmission device.
It is possible to provide a disconnector operating device that is effective in improving reliability and system efficiency.

[Brief explanation of drawings]

Figure 1 is a block diagram of a conventional disconnector operating device.
2 is a block diagram of a disconnector operating device according to an embodiment of the present invention, FIG. 3 is a block diagram showing a detailed configuration of the control center interlock device of FIG. 2, and FIG.
This figure is a system configuration diagram of a system including disconnectors operated by the devices shown in FIGS. 2 and 3, and FIG. 5 is an explanatory diagram of a pattern for interlock determination. A...Operation console, B...Signal transmission device, C...Local interlock device, D...Disconnector, E...Control center interlock device, E2...Storage unit, E3
. . . Judgment section, E4 . . . Interlock judgment section.

Claims (1)

[Scope of Claims] 1. A disconnector operating device that remotely controls a disconnector installed in a power system via a signal transmission device and a local interlock device using a control signal based on an operation request from a control center, comprising: a storage section that stores system equipment information such as the installation position of the disconnect switch, usage classification, and interlock pattern for interlock determination; a determination unit that extracts only information corresponding to the control signal from among the system equipment information, determines the system configuration, and outputs it as equipment information; a control center interlock device having an interlock determination unit that determines the validity of the operation request based on switching information of the switch necessary for locking, and the interlock determination unit determines that the operation request is not valid as a result of the determination; A disconnector operating device characterized by comprising means for prohibiting transmission of the control signal to the signal transmission device and notifying a control center thereof when the determination is made.