JP4991470B2 - Condition discrimination circuit - Google Patents

Description

  The present invention relates to an on-site control panel having a circuit for monitoring and controlling substation equipment used in substations / switching stations and the like, and relates to an improvement of a circuit for providing an inexpensive and highly reliable on-site control panel.

  The demand for electric power is increasing in the modern society, and the need for a stable supply of electric power is expected to increase further in the future. Here, substation equipment is usually used for the transmission system that supplies power. However, when a failure occurs, the impact on power supply is very large, so improving the reliability of this substation equipment is not possible. It is essential.

  A conventional example of such a substation facility will be described below with reference to FIGS. A substation is usually composed of a plurality of substations and a control system. Among these substations, switchgears and transformers are the main components. Here, gas-insulated switchgear (GAS INSULATED) occupies the mainstream of switchgear. A case in which SWITCHGEAR (hereinafter referred to as GIS) is employed will be described.

  FIG. 10 is a single-line diagram showing an example of such a GIS. The GIS is a device that is housed in a grounded metal container together with a high-voltage charging medium such as a switch and a conductor, and as shown in FIG. 10, the devices and main components of the circuit breaker 2, disconnector 3, ground switch 4 It consists of 5 buses. Further, in the vicinity of the GIS, a GIS control panel 1 which is a control system is installed for each line. The GIS control panel 1 includes a plurality of circuit breakers 2, disconnectors 3, ground switches 4 and the like constituting the GIS. A circuit for controlling the device and a circuit for monitoring the gas density of the GIS and the state of each device are provided.

  In the GIS control panel 1, the on / off state and the gas density state of other transformers are configured as an interlock circuit in order to determine whether or not the device can be operated. Here, there are two types of equipment interlocking conditions, one for the purpose of preventing accidents and the other for the substation operational standards. In the latter case, the main transformer or generator The circuit breaker closing operation is locked on condition of a predetermined number.

  In order to configure a control circuit that locks the circuit breaker operation according to the predetermined number of main transformers and generators in the operating state, a signal contact for detecting the device state and a relay contact are provided. It is common to use. Specifically, signal contacts that are turned on when the main transformer or generator is in operation are taken into the GIS control panel 1 and these signals are amplified using a plurality of relays, and the main transformer In addition, there is provided a condition determination circuit that turns the output ON when the number of operating generators is a specific value.

  FIG. 11 shows an embodiment of the condition discriminating circuit. As shown in FIG. 11, the condition determination circuit includes a plurality of device status contacts 11 that detect the status of a plurality (5) of devices and a plurality of relay relays 12 to which the device status contacts 11 are connected. ing.

  Each relay relay 12 is distinguished by attaching symbols X1 to X5, and constitutes a circuit that determines the number of operating states of the device by the combination of the contacts 13 and 14 of these relay relays 12. The contact 13 is a contact, and is a contact that opens when the coil of the relay relay 12 is not excited and closes when the coil is excited. On the other hand, the contact 14 is a contact b, which is a contact that is closed when the coil of the relay relay 12 is not excited and is opened when the coil is excited.

  In addition, in FIG. 11, when the number of apparatuses is five, the example of a circuit which detects that any three apparatus among these is in an operation state is shown, and all three are in an operation state. These combinations are simulated by the contacts 13 and 14, and when any combination is established, the output terminals 15 and 16 are turned ON.

Further, Patent Document 1 discloses that in a control panel that controls and monitors substation equipment, the open / close state signal of each substation equipment is relayed by an amplification relay, and the contacts of the amplification relay are connected in accordance with the interlock conditions of each substation equipment. A control circuit for discriminating openable / closable conditions for each device is shown. Patent Document 2 discloses a circuit in which an interlock circuit is disposed on a switchgear control board provided in a control system for controlling and monitoring substation equipment. The switch signal is taken into the switchgear control board, and it is determined by this signal whether or not the interlock condition of each substation is satisfied.
JP 2002-171616 A Japanese Patent Laid-Open No. 10-136519

By the way, in the control circuit disposed in the GIS control panel 1 which is the prior art, all the combinations of the device states are simulated by the contacts 13 and 14 of the relay relay 12, so that the number of contacts is very large. The problem that it becomes necessary arises. For example, among 5 contact inputs when there are 5 devices, there are ₅ C ₃ = 10 combinations where 3 are turned ON, so the required number of contacts is 5 for one combination. Since contacts are required, 5 × 10 = 50.

Further, if the number of devices is further increased, for example, there are 10 contact inputs, and when 3 of them are turned ON, a combination of 3 of 10 contact inputs turned ON. Since the number is ₁₀ C ₃ = 120, the required number of contacts is 10 × 120 = 1200.

  That is, the required number of contacts X when N of the M contact inputs are ON can be expressed by the following equation.

[Equation 1]
_M C _N = M! / ((MN)! × N!)
X = M × _M C _N

  Although it is possible to reduce the number of necessary contacts somewhat by putting together common parts of the circuit, the number of contacts increases rapidly as the number of target devices increases, increasing costs and reducing reliability. Was a problem. When the number of target devices is large, a method of maintaining reliability by applying a sequencer to perform arithmetic processing is conceivable, but the cost increase cannot be avoided.

  Also, in Patent Documents 1 and 2, when relaying the open / closed state signal of the substation equipment with a relay, the relay contact increases as described above with the increase of the signal, so that the circuit creation cost becomes expensive. The decrease in reliability was a problem.

  The present invention has been proposed to solve the above-described problems, and its purpose is to provide an inexpensive and highly reliable condition determination circuit as a circuit disposed in a control panel for a substation equipment. There is to do.

In order to achieve the above-described object, the present invention includes a plurality of relays to which signals for detecting an operation state of the device are contact-input, and the plurality of relays use a plurality of switching contacts, A condition discriminating circuit that outputs when detecting a condition in which the number of ON contacts is N among M contact inputs, and the M switching contacts are connected in series in correspondence with the number of contact inputs. N + 1 in parallel corresponding to the number of discriminating contacts is formed to form a matrix-like switching contact group of M stages and N + 1 columns, and M + 1− (in the switching contacts of the nth column constituting the matrix. N−n) switching contacts belonging to the stages higher than the nth and switching contacts belonging to the n−1th stage or lower among the switching contacts in the nth column are used as switching contacts unnecessary for the condition detection. Ri Na was excluded from the matrix of switching contact groups, the Matrigel The break contact of the N + 1 row of switching contact of the box, characterized in that the output terminal is connected.

  Further, in the condition determination circuit that outputs when detecting the condition that the number of ON contacts is N or more among the M contact inputs, the switching of the (N + 1) th column constituting the M-stage / N + 1-column matrix is performed. Another aspect of the present invention is that the output terminal is connected to the contact make and break contacts.

  In the condition determination circuit that outputs when a plurality of specific values including the maximum value N and the minimum value N ′ are detected among the M contact inputs, the condition determination circuit that outputs a plurality of specific values is detected. From the matrix-like switching contact group, the switching contacts belonging to the M + 1− (N′−n) th and higher stages in the switching contacts of the nth column constituting the matrix and the switching contacts of the nth column Another aspect of the present invention is that switching contacts belonging to the (n−1) th and lower stages are excluded as switching contacts unnecessary for the condition detection.

  According to the present invention as described above, since the condition determination circuit in the control panel is configured by combining the switching contacts based on a predetermined condition, even if the number of devices increases, the conventional relay contact It is possible to provide an inexpensive and highly reliable condition discriminating circuit because the number of contacts is remarkably reduced as compared with the case of using.

[1. First Embodiment]
[1.1. Constitution]
Next, the configuration of the condition determination circuit mounted in the substation control panel according to the first embodiment will be described below with reference to FIG. Further, the same members as those in the circuits shown in FIGS. 10 and 11 as the prior art are denoted by the same reference numerals, and description thereof is omitted. The first embodiment relates to a condition determination circuit that turns on an output terminal when the number of contacts that are turned on is N, which is a specific value, among a plurality of M contact inputs.

  As shown in FIG. 1, the condition determination circuit according to the present embodiment is connected to a plurality of device state contacts 11 for detecting the state of the device and the device state contact 11 as in the prior art described in FIGS. A plurality of relay relays 17 are provided. In the circuit example of FIG. 1, it is assumed that the number of devices is five and that any three of these devices are detected to be in an operating state (ON state).

  That is, five device status contacts 11 and five relay relays X1, X2,..., X5 are connected so as to correspond to the respective device status contacts 11. For this reason, the output terminals 19 and 20 are turned on only when three of the contact inputs of the five relay relays 17 are turned on.

  Here, each relay relay 17 is composed of a contact and b contact in the prior art, whereas in the present embodiment, a plurality of switching contacts 18 are arranged under predetermined conditions. Yes. The switching contact 18 includes an a contact (make contact) that is open when the coil of the relay relay 17 is in an unexcited state and a closed state when the coil is in an excited state, and a b contact that is closed when the coil is in an unexcited state and open when the coil is in an excited state. (Break contact) outputs are provided in pairs.

  The predetermined condition in which the switching contact 18 is disposed in the relay relay 17 is that M contact inputs corresponding to the number of relay relays 17 disposed, and N is a specific value that is the number of contacts that are turned ON. In this case, it can be expressed as follows. More specifically, by connecting M switching contacts 18 in series according to the number of contact inputs of the relay relay 17 and N + 1 in parallel according to the number of contacts that are turned ON, a matrix of M stages and N + 1 rows is formed. A switching contact group is formed, and unnecessary switching contacts 18 calculated based on the following relational expression are excluded from the switching contact group, thereby comprising M relay relays 17 having a predetermined number of switching contacts 18. A condition determination circuit is configured.

  As described above, the M stage indicates the number of contact inputs corresponding to the number of relay relays 17, and the N + 1 column indicates that the current route changes to the right when the switching contact 18 is turned ON. The current route according to the number of contacts is shown. The relational expression showing the switching contact 18 excluded from the switching contact group of M stages and N + 1 columns can be expressed as follows with respect to the nth column which is the transition sequence of the current route.

[Equation 2]
Switching contact belonging to M + 1− (N−n) th and higher stages ∧ Switching contact belonging to n−1th and lower stages where 1 ≦ n ≦ N + 1
1 ≦ M
0 ≦ N

  Note that the switching contacts 18 to be excluded shown in [Equation 2] are for the nth column, and therefore, the total number of contacts to be excluded from the first column to the (N + 1) th column is assigned 1 to N + 1 for n. By doing so, it can be represented by the sum of the number of contacts for each column.

  For example, when calculating the required switching contact 18 under the condition that there are 5 contact inputs corresponding to 5 relay relays and 3 contact ON points using the above [Equation 2], By substituting M = 5, N = 3, and n = 1 to 4 into [Equation 2], the number of contacts to be eliminated for every 1 to 4 columns is calculated. Then, the condition determination circuit as shown in FIG. 1 is configured by making the calculated number of contacts correspond to each column and removing it from the switching contact group having 20 contacts in 5 stages and 4 columns.

  Specifically, taking the first row as an example, out of a total of five switching contacts 18 arranged in each of the five stages, the switching contacts of the fourth and higher stages calculated based on the above [Equation 2] ( By substituting M + 1− (N−n) for M = 5, N = 3, and n = 1) and switching contacts at the 0th stage and below (substituting n = 1 for n−1), 1 A total of three switching contacts arranged on the third stage can be derived. When the switching contacts 18 arranged in the 2nd to 4th rows are also calculated in the same manner as above, the 2nd row has 3 pieces in the 2nd to 4th rows, the 3rd row has 3 pieces in the 3rd to 5th rows, and the 4th row. Then, the two switching contacts 18 in the fourth and fifth stages can be derived.

  That is, in the condition determination circuit for detecting the number of contact inputs of five, of which three contacts are turned ON, a total of 11 switching contacts 18 (sum of the number of switching contacts in the first to fourth columns) are shown in FIG. It will be provided based on such an arrangement. Further, if the number of switching contacts 18 arranged for each relay relay 17 is shown, one for the first relay relay X1, two for the second relay relay X2, and three for the third relay relay X3. Three, three for the fourth relay relay X4, and two for the fifth relay relay X5.

  In FIG. 1, the output terminal 19 is connected to the first column of the switching contact 18, and the output terminal 20 is connected to the fourth column that is the rightmost column of the switching contact 18. Even if the number of contact inputs and the number of contacts that are turned on are not limited to the above numbers, in this embodiment, the output terminal 19 is connected to the first column and the output terminal 20 is connected to the rightmost column.

  In addition, FIG. 1 shows a circuit example in the case of detecting the number of three contacts that are turned on among five contact inputs, but in FIG. 2, 1 to 7 contact inputs M are turned on. The switching contact 18 of the condition discriminating circuit obtained by eliminating the number of contacts calculated based on the above [Equation 2] from the switching contact group of M stages and N + 1 rows under the condition that the number of contacts N is 1 to 7. An arrangement example is shown.

  Further, FIG. 3 shows the required total number of contacts in the condition determination circuit having the arrangement of the switching contacts 18 of FIG. For example, in the case of a condition determination circuit that detects five contact inputs and detects the number of three contacts that are turned on, the required total number of contacts is 50 in the prior art, whereas in the present embodiment, it is As you can see, 11 is enough.

[1.2. Action]
Next, FIG. 4 shows the operation according to the first embodiment having the configuration of the condition determination circuit that turns on the output terminal when the number of contacts that are turned on among the five contact inputs becomes three. This will be described below with reference. 4A to 4D are circuit diagrams for illustrating the circuit operation shown in FIG. 1 in detail, and show how the current route changes when each relay relay 17 is turned on. In these figures, the A column, the B column, the C column, and the D column indicate transition sequences of the current route.

  FIG. 4A shows a case where all of the relay relays X1 to X5 are OFF. In this case, the current route is configured along the A column as indicated by the broken line, and is switched after the B column. Absent. FIG. 4B shows a case where only the relay relay X1 is turned ON. In this case, the current route is switched from the A row to the B row by the switching contact 18 provided in the relay relay X1. .

  FIG. 4C shows a circuit state when the relay relay X2 is further turned on from the state of FIG. 4B, and the current route is changed by the switching contact 18 disposed in the relay relay X2. The B column is switched to the C column. FIG. 4 (d) shows a circuit state when the relay relay X3 is further turned on from the state of FIG. 4 (c). In this case, the current route is further switched by the switching contact 18 provided in the relay relay X3. The C column is switched to the D column.

  Here, since the circuit example of FIG. 4 shows a case where the number of contacts that turns on for three contact inputs is detected, the output terminal 20 is set so that the three relay relays 17 are turned on. Are connected to row D. That is, when the current route is switched to the D row, the output terminal 19 connected to the A row in this state and the output terminal 20 are turned ON.

  On the other hand, when the relay relay X4 is further turned on from the state of FIG. 4D, the current route is switched from the D row by the switching contact 18 of the relay relay X4, so that the output terminals 19 and 20 are again turned off from the ON state. It becomes.

  4A to 4D, the relay relays X1, X2, and X3 are turned on. However, the combinations that are turned on are not limited to the above. For example, X1, X2, Even when any three of the five relay relays 17 are turned on, such as when X4 is turned on, the output terminals 19 and 20 are turned on.

  Furthermore, in the above description, the operation example of the circuit in which the output terminal is turned on when the number of contact inputs is five and three of the contacts are turned on has been described. It is not a thing. That is, in the predetermined condition determination circuit that detects when N of the M contact inputs are ON, the current route is similarly changed to the right by the switching contact 18 provided in each relay relay 17. And the output terminal is turned ON.

[1.3. effect]
According to the first embodiment as described above, in the condition determination circuit that operates to turn on the output terminal when the number of switching contacts to be turned on is N, which is a specific value, among the M contact inputs. By constructing the circuit by eliminating the predetermined number of switching contacts calculated based on the above [Equation 2] from the switching contact group of M stages and N + 1 rows, the number of contacts is significantly smaller than that of the conventional method. Thus, a highly reliable condition determination circuit can be provided.

  Specifically, for example, as shown in FIG. 3, when detecting the condition that the number of three contacts out of five contact inputs is ON, the required number of contacts is 50 in the prior art. On the other hand, in this embodiment, the number of contacts is 11 and the number of contacts is significantly reduced, so that an inexpensive condition determination circuit can be provided.

[2. Second Embodiment]
[2.1. Constitution]
Next, the configuration of the condition determination circuit mounted in the substation control panel according to the second embodiment will be described below with reference to FIG. The same components as those in the first embodiment shown in FIGS. 1 and 4 are denoted by the same reference numerals, and the description thereof is omitted. Note that the second embodiment relates to a condition determination circuit that turns on an output terminal when the number of contacts that are turned on among a plurality of M contact inputs is N or more, which is a specific value.

  In the second embodiment, in the condition determination circuit shown in the first embodiment, the output terminal 20 is not only connected to the transition row of the rightmost current route in which the switching contact 18 is disposed, but also arranged in that row. It is also configured to be connected to the a contact of the provided switching contact 18 so that a current is sent to the output terminal 20 even when going to the right side from the rightmost column.

  For example, as shown in FIG. 5, when the switching contact 18 is in the ON state, the switching contact 18 shifts the current route to the right, so that b of the switching contact 18 of the relay relays X4 and X5 arranged in the D row located on the rightmost side. The output terminal 20 is connected not only to the contact but also to the a contact. On the other hand, in the case of the first embodiment, the output terminal 20 is connected only to the b contact of the switching contact 18 arranged in the D row. Other configurations are the same as those in the first embodiment.

  FIG. 5 corresponds to FIG. 1 and shows an example of a circuit that detects three switching contacts 18 that are turned ON among five contact inputs. In the second embodiment, the first embodiment is different from the first embodiment. Similarly, the number of contact inputs and the number of contacts to be turned on are not limited.

[2.2. Action]
Next, the operation according to the second embodiment having the above configuration will be described. The operation mode in which the output terminals 19 and 20 are turned on when there are five contact inputs and three or more switching contacts are turned on will be described in light of the circuit example of FIG.

  First, the circuit operation in which the relay relays X1 to X3 are turned on is the same as in the first embodiment, and the current route is changed in order from the A row by the switching contact 18 provided in the relay relays X1, X2, and X3. You can switch to a row. As in the first embodiment, the output terminals 19 and 20 are turned ON through the output terminal 20 connected to the D row.

  Further, in the relay relays X4 and X5 whose number of contacts to be turned on is the fourth or later, when either or both of them are turned on, the current route is changed from the D row by the switching contact 18 arranged in the D row. Although the output terminal 20 is connected to the contact a of the switching contact 18, the current is sent to the output terminal 20 and the output terminals 19 and 20 are turned ON.

  In addition, as shown in FIG. 5, the operation in which either or both of the relay relays X1, X2, and X3, X4, and X5 are turned on has been described. However, the combination that is turned on is not limited to the above. When any three or more of the five relay relays 17 are turned on such that the relay relays X2, X3, X4, and X5 are turned on, the output terminals 19 and 20 are turned on.

[2.3. effect]
According to the second embodiment as described above, a condition determination circuit is configured by combining the same number of switching contacts as in the first embodiment, and the number of relay relays to be turned on, that is, the switching contacts are turned on. By switching the output terminal to ON when the number of times of switching to a specific value or more is reached, it can be applied to a wider range of contact input signals compared to the first embodiment, compared to the conventional method It is possible to provide a highly reliable condition determination circuit with a remarkably small number of contacts.

[3. Third Embodiment]
[3.1. Constitution]
Next, the configuration of the condition determination circuit mounted in the substation control panel according to the third embodiment will be described below with reference to FIG. Further, the same components as those in the first and second embodiments shown in FIGS. 1, 4 and 5 are denoted by the same reference numerals, and description thereof is omitted. Note that the third embodiment relates to a condition determination circuit that turns on an output terminal when the number of contacts that are turned ON among a plurality of M contact inputs becomes a plurality of specific values.

  In the third embodiment, in order to turn ON between the output terminals 19 and 20, a plurality of specific values that are the number of contacts to be turned ON are plural. Therefore, when each desired specific value is A, Thus, the output terminal 20 is connected to the transition row of the A + 1th row.

  In the third embodiment as well, as in the first and second embodiments, a plurality of switching contacts 18 are combined with the relay relay 17, and the number of the switching contacts 18 is the same as that of the first embodiment. And the second embodiment is different. Specifically, when there are M contact inputs corresponding to the number of relay relays 17 and the maximum value is N and the minimum value is N ′ among a plurality of contact points that are turned ON as desired, The number of switching contacts 18 necessary for the condition determination circuit is expressed as follows.

  By connecting M switching contacts 18 in series according to the number of contact inputs of the relay relay 17 and N + 1 corresponding to the maximum number N of contacts that are turned on, M stages and N + 1 are connected in parallel. A switching contact group on a matrix of columns is formed, and unnecessary switching contact 18 calculated based on the following relational expression is excluded from the switching contact group, thereby calculating the switching contact 18 necessary for the condition determination circuit. . The relational expression showing the switching contact 18 excluded from the switching contact group of M stages and N + 1 columns can be expressed as follows with respect to the nth column which is the transition sequence of the current route.

[Equation 3]
Switching contact belonging to M + 1− (N′−n) and higher stages ∧ Switching contact belonging to n−1 and lower stages where 1 ≦ n ≦ N + 1
1 ≦ M
0 ≦ N

  Note that the switching contacts 18 to be excluded shown in [Equation 3] are for the nth column, and therefore, the total number of contacts to be excluded from the first column to the N + 1th column is assigned 1 to N + 1 for n. By doing so, it can be represented by the sum of the number of contacts for each column.

  Here, for example, when calculating the required switching contact 18 when the number of contact inputs corresponding to five relay relays is 5, and the number of contacts, which are a plurality of specific values to be turned ON, is 1, 2, and 3. First, M = 5 and n = 1 to 4 are substituted into [Equation 3], and N = 3, which is the maximum number of contacts among a plurality of specific values, and N ′, which is the minimum number of contacts. By substituting = 1, the number of contacts to be eliminated for every one to four columns is calculated. Then, the calculated number of contacts is made to correspond to each column and excluded from the switching contact group having 20 contacts in five stages and four columns, thereby forming a condition determination circuit as shown in FIG.

  Specifically, taking the first row as an example, out of a total of five switching contacts 18 arranged in each of the five stages, the switching contacts of the sixth stage or more calculated based on the above [Equation 3] ( By eliminating M + 1− (N′−n) with M = 5, N ′ = 1, and n = 1) and switching contacts at the 0th stage and below (substituting n = 1 with n−1) , A total of five switching contacts arranged respectively in the first to fifth stages can be derived. When the current route under this condition is in the first row, there is no contact excluded from the five switching contacts 18.

  When the switching contacts 18 arranged in the 2nd to 4th rows are also calculated in the same manner as described above, the 2nd row has 4 pieces in the 2nd to 5th rows, the 3rd row has 3 pieces in the 3rd to 5th rows, and the 4th row. Then, the two switching contacts 18 in the fourth and fifth stages can be derived. That is, there are a total of 14 condition discriminating circuits that detect three specific values of five contact inputs, of which 1, 2, and 3 are turned on (sum of the number of switching contacts in the first to fourth columns). The switching contact 18 is provided based on the arrangement as shown in FIG.

  Then, the output terminal 20 is connected to the transition sequence of the current route of the second, third, and fourth columns, which is incremented by +1 for each of a plurality of specific values 1, 2, and 3. Specifically, the output terminal 20 is connected to the B, C, and D rows of the current route.

[3.2. Action]
Next, the effect | action which concerns on 3rd Embodiment which has the above structure is demonstrated. In the meantime, an operation mode in which the output terminals 19 and 20 are turned on when any one of 1, 2, and 3 of the five contact inputs are turned on will be described in light of the circuit example of FIG.

  For example, when only the relay relay X1 is turned ON, the current route is switched from the A row to the B row by the switching contact 18 disposed in the relay relay X1, and the output terminal 20 connected to the B row is connected. When the output is sent, the output terminals 19 and 20 are turned ON. In addition, not only the relay relay X1, but also one or two of the other relay relays X2 to X5 are turned on, current is sent to the output terminal 20 connected to the C and D rows, and the output terminal Between 19 and 20 is ON.

  Specifically, when the relay relay X2 is turned ON, when the current route is switched from the B row to the C row through the switching contact 18, a current is sent to the output terminal 20 connected to the C row, and the output The terminals 19 and 20 are turned on. Further, when not only the relay relays X1 and X2 but also the relay relay X3 is turned ON, if the current route is switched from the C row to the D row through the switching contact 18, the current is output to the output terminal 20 connected to the D row. And the output terminals 19 and 20 are turned ON.

  When either or both of the relay relays X4 and X5 are turned ON, the current route is removed from the D row through the switching contact 18 provided in the relay relays X4 and X5, so that the output terminals 19 and 20 are not connected. It is turned off.

  In the above, an example of operation in which the relay relays X1, X2, and X3 are turned on is described. However, the relay relay that is turned on is not limited to this, and five contact inputs of the relay relays X1 to X5 are input. If one, two or three of the contacts are turned on, the output terminals 19 and 20 are turned on. Furthermore, in the present embodiment, the number of contact inputs and the number of contacts that are specific values that turn on the output terminals 19 and 20 are not limited to the above, and if the specific value that turns on is equal to or less than the number of contact inputs, This can be dealt with by changing the connection location of the output terminal 20 based on the above conditions.

[3.3. effect]
According to the third embodiment as described above, the output terminal is turned on when a specific value (maximum is N, minimum is N ′) having a plurality of switching contacts to be turned ON among M contact inputs. Therefore, it is possible to easily realize a condition determining circuit capable of determining a contact input within a specific range. Further, such a condition determination circuit is configured by eliminating the predetermined number of switching contacts calculated based on the above [Equation 3] from the switching contact group of M stages and N + 1 columns, thereby comparing with the conventional method. Thus, the number of contacts can be significantly reduced, and an inexpensive and highly reliable circuit can be provided.

  Specifically, as described above, for example, in the case of detecting a condition in which the number of contacts of 1, 2 and 3 out of 5 contact inputs is ON, the number of necessary contacts is In contrast to the 50 contacts (when the number of contacts that are turned on is 3), the number of contacts is 14 in this embodiment, and the number of contacts is significantly reduced, so that an inexpensive condition determination circuit can be provided.

[4. Fourth Embodiment]
[4.1. Constitution]
Next, the configuration of the condition determination circuit mounted in the substation control panel according to the fourth embodiment will be described below with reference to FIG. In addition, the same components as those in the first to third embodiments shown in FIGS. Note that the fourth embodiment relates to a condition determination circuit that turns on an output terminal when the number of contacts that are turned on among a plurality of M contact inputs is equal to or less than a specific value.

  In the fourth embodiment, the output terminals 19 and 20 are turned on when the number of contacts that are turned on is equal to or less than a specific value. Therefore, when the specific value is N, each transition sequence of current routes equal to or less than N + 1. The output terminal 20 is connected to the terminal. Note that the specific value N or less means that 0 to N N + 1 types of current routes are conceivable, so the output terminal 20 is connected to a transition sequence of N + 1 or less.

  Also in the fourth embodiment, as in the first to third embodiments, a plurality of switching contacts 18 are arranged in combination with the relay relay 17, and the number of the switching contacts 18 is the number of the first switching contacts 18. This is different from the third to third embodiments. Specifically, when there are M contact inputs corresponding to the number of relay relays 17 and the number of contacts to be turned ON is N or less, the number of switching contacts 18 necessary for the condition determination circuit is expressed as follows. The

  By connecting M switching contacts 18 in series according to the number of contact inputs of the relay relay 17 and N + 1 in parallel according to the number of discrimination contacts to be turned ON, the switching contact group on the matrix of M stages and N + 1 columns can be obtained. Then, the unnecessary switching contact 18 calculated based on the following relational expression is excluded from the switching contact group, thereby calculating the switching contact 18 necessary for the condition determination circuit. The relational expression showing the switching contact 18 excluded from the switching contact group of M stages and N + 1 columns can be expressed as follows with respect to the nth column which is the transition sequence of the current route.

[Equation 4]
Switching contacts belonging to the n-1th stage or lower, where 1 ≦ n ≦ N + 1
0 ≦ N

  Note that the switching contacts 18 to be excluded shown in [Equation 4] are for the nth column, and therefore, the total number of contacts to be excluded from the first column to the (N + 1) th column is assigned 1 to N + 1 for n. By doing so, it can be represented by the sum of the number of contacts for each column.

  Here, for example, when the required switching contact 18 is calculated when the number of contact inputs corresponding to five relay relays is five and the specific value to be turned ON is three or less, first, the above [Equation 4 ] Is substituted for n = 1 to 4, thereby calculating the number of contacts to be excluded for every 1 to 4 columns. Then, the calculated number of contacts is made to correspond to each column and excluded from the switching contact group having 20 contacts in five stages and four columns, thereby forming a condition determination circuit as shown in FIG.

  Specifically, taking the first row as an example, out of a total of five switching contacts 18 arranged in each of the five stages, the switching contacts of the zeroth stage and below calculated based on [Equation 4] ( By substituting n = 1 for n−1, it is possible to derive a total of five switching contacts respectively arranged in the first to fifth stages. When the current route under this condition is in the first row, there is no contact excluded from the five switching contacts 18.

  When the switching contacts 18 arranged in the 2nd to 4th rows are also calculated in the same manner as described above, the 2nd row has 4 pieces in the 2nd to 5th rows, the 3rd row has 3 pieces in the 3rd to 5th rows, and the 4th row. Then, the two switching contacts 18 in the fourth and fifth stages can be derived. In other words, a total of 14 switching contacts (sum of the number of switching contacts in the first to fourth columns) are included in the condition determination circuit for detecting the case where there are five contact inputs, of which three or less specific values are ON. 18 is provided based on the arrangement shown in FIG.

  And since the specific value which turns ON between the output terminals 19 and 20 is 3 or less, the output terminal 20 is connected to the transition sequence of the current route below the 4th column, respectively. Specifically, the output terminal 20 is connected to the A, B, C, and D rows of the current route.

[4.2. Action]
Next, an operation according to the fourth embodiment having the above configuration will be described. In the meantime, an operation mode in which the output terminals 19 and 20 are turned ON when the number of contacts that are turned ON among the five contact inputs is three or less will be described in light of the circuit example of FIG.

  When all of the relay relays X1 to X5 are OFF, the current route is configured along the A row, current is sent to the output terminal 20 connected to the A row, and the output terminals 19 and 20 are turned ON. Further, when any one of the relay relays X1 to X5 is turned ON, the current route is changed from the A row to the B, C, and D rows by the switching contact 18 provided in each relay relay 17. By switching and sending current to the output terminal 20, the output terminals 19 and 20 are turned ON.

[4.3. effect]
According to the fourth embodiment as described above, it is possible to operate the output terminal to be turned on when the number of switching contacts to be turned on is N or less which is a specific value among the M pieces of contact inputs. Therefore, it is possible to easily realize a condition determining circuit that can be determined in a predetermined contact input range that is equal to or less than a specific value. Further, such a condition determination circuit is configured by eliminating a predetermined number of switching contacts calculated based on the above [Formula 4] from the switching contact group of M stages and N + 1 columns, thereby comparing with the conventional method. Thus, the number of contacts can be significantly reduced, and an inexpensive and highly reliable circuit can be provided.

  Specifically, as described above, for example, in the case of detecting the condition that the number of contacts of 3 or less out of 5 contact inputs is ON, the required number of contacts is 50 in the prior art ( In contrast, the number of contacts in the present embodiment is 14, and the number of contacts is significantly reduced. Therefore, an inexpensive condition determination circuit can be provided.

[5. Fifth Embodiment]
[5.1. Constitution]
Next, the configuration of the condition determination circuit mounted in the control panel for a transformer device according to the fifth embodiment will be described below with reference to FIG. In addition, the same constituent members as those in the first to third embodiments shown in FIGS. The fifth embodiment is characterized in that an output terminal is connected to each transition row of the current route switched by the switching contact 18.

  In the fifth embodiment, the relay relay 17 is provided with a plurality of switching contacts 18 in combination. The number and arrangement of the switching contacts 18 are the same as those in the fourth embodiment. That is, the number of the switching contacts 18 derived by eliminating the number of contacts calculated based on the above [Equation 4] from the switching contact group of M stages and N + 1 columns is adopted for each transition sequence that is a current route.

  Here, an output terminal is connected to each current route in the N + 1 column, and an output terminal is also connected to a contact of each switching contact 18 arranged in the N + 1 column which is the rightmost current route. Is done. As a result, current is sent to the output terminal corresponding to each transition row not only for the number of contacts that are turned ON up to N, but also for the number of contacts that are larger than N. Thus, a plurality of output terminals can be used in any combination.

  For example, in the circuit example of FIG. 8, when there are five contact inputs by the relay relays X1 to X5, in the condition determination circuit in which the switching contacts 18 similar to those in FIG. The output terminals 22 to 25 are connected to the A to D columns of the current route formed by .about.X5, respectively. Further, as shown in FIG. 8, the output terminal 21 is connected to the contact a of the switching contact 18 of the relay relays X4 and X5 arranged in the D row, and this switching contact 18 arranged in the relay relays X4 and X5. By switching either or both of these to ON, current is sent to the output terminal 21 even when the current route deviates from the D row.

[5.2. Action]
Next, an operation according to the fifth embodiment having the above configuration will be described. In particular, in the present embodiment, in light of the circuit example of FIG. 8, the output terminals 21 to 25 connected to the current routes of the A to D columns, and further to the current route when switched from the D row to ON, The operation mode output between the output terminals 19 connected to the switching contact 18 of the relay relay X1 will be described.

  In the fifth embodiment, since the output terminals 21 to 25 are connected to each transition row of the current route, the output terminals that are actually turned on are individually selected from the output terminals 21 to 25 or used in combination. can do.

  For example, when the output terminals 24 and 25 are selected and the outputs from the terminals are used in combination, first, when all of the relay relays X1 to X5 are OFF, the current route is configured along the A column. A current is sent to the output terminal 25 connected to. Further, when the relay relay X1 is turned ON, the current route is switched from the A row to the B row at the switching contact 18 disposed in the relay relay X1, and when the other relay relays X2 to X5 are OFF, A current is sent to the output terminal 24 through the B row. Then, the outputs at the output terminal 19 and between the output terminals 2524 to which current is sent are combined and output.

[5.3. effect]
According to the fifth embodiment as described above, a plurality of output terminals are used in combination because each output terminal is connected to each transition row of the current route switched through the switching contact. In addition, it is possible to provide a condition discriminating circuit that can arbitrarily select the discriminating circuit conditions in the same circuit and can flexibly cope with future set value changes.

[6. Sixth Embodiment]
[6.1. Constitution]
Next, the configuration of the condition determination circuit mounted in the substation control panel according to the sixth embodiment will be described below with reference to FIG. In the sixth embodiment, the control circuit that blocks the operation of closing the circuit breaker on condition that the predetermined number of main transformers and generators in the operating state are combined with the predetermined number of switching contacts 30 described above. 5 is applied.

  In the present embodiment, as an example, four main transformers and eight generators are provided, three of the four main transformers are in operation, and three of the eight generators are in operation. The circuit that blocks the circuit breaker closing operation when the above is in operation is shown.

  As shown in FIG. 9, main transformer state contacts 26 for detecting the operation states of the four main transformers are connected to relay relays 27 indicated by X1 to X4, respectively. Moreover, the generator state contact 28 which detects the operation state of eight generators is connected to the eight relay relays 29 each shown by Y1-Y8.

  Here, X1 to X4 which are the relay relays 27 are switching contacts when the contact input is M = 4 and ON and the number of discriminating contacts is N = 3 as shown in FIGS. 2 and 3 in the first embodiment. It has 30 arrangements and number of contacts.

  Further, Y1 to Y8 which are relay relays 29 are the same as the arrangement configuration of the switching contact 30 in the case of M = 8 and N = 3 in the second embodiment, and the transition sequence of the current route located on the rightmost side. The output terminal is connected to the switching contact 30 of the relay relays X4 to X8 disposed in the circuit. Further, the output terminal is also connected to the contact a of the switching contact 18 disposed in the rightmost column, so that a current is sent to the output terminal even when going to the right side from the rightmost column. It is configured.

  In the relay relay 29 of Y1 to Y8, the output is turned on when the number of contact inputs is 8 and the number of discriminating contacts of 3 or more is turned on. By eliminating the number of contacts calculated based on [Equation 2], 6 in the 1st to 6th stages in the first row, 2 in the second row, 6 in the 2nd to 7th rows, 3 to 8 in the third row Six, four switching contacts 30 of 4 to 8 stages are arranged in the fourth row.

  Further, as shown in FIG. 9, the outputs of the relay relays 29 of Y1 to Y8 are input to the relay relays 27 of X1 to X4. That is, the condition determination circuit in this embodiment includes the relay relays 29 of Y1 to Y8 provided with 23 switching contacts 30 and the relay relay 27 of X1 to X4 provided with seven switching contacts 30. It is composed of 12 relay relays combined, and its output is connected to the relay relay 31. Further, the b-contact 32 of the relay relay 31 is connected in series to the circuit breaker closing control circuit 33.

[6.2. Action]
Next, an operation according to the sixth embodiment having the above configuration will be described. This embodiment relates to an operation mode when three or more of the relay relays Y1 to Y8 are ON and three of the relay relays X1 to X4 are ON in light of the circuit example of FIG. .

  First, in the sixth embodiment, only when three or more of the relay relays Y1 to Y8 are ON and three of the relay relays X1 to X4 are ON, an output is sent to the relay relay 31, The relay relay 31 is switched on.

  Specifically, when three or more of the relay relays Y1 to Y8 are turned on, the current route exceeds the D row or the D row in order from the A row through the switching contact 30 provided in each relay relay 29. Switching to the transition example, the outputs from the relay relays Y1 to Y8 are sent to the relay relays 27 of X1 to X4. Then, when three of the relay relays X1 to X4 are turned ON, the current route is switched from the A ′ row to the D ′ row in order through the switching contact 30 provided in each relay relay 27, and the relay relays X1 to X1 are switched. The output from X4 is sent to the relay relay 31.

  As described above, by sending the output from the relay relays 27 and 29 to the relay relay 31 having the b contact 32, the relay relay 31 is switched ON, and the b contact 32 is turned OFF. Therefore, the circuit breaker closing control circuit 33 connected in series to the b contact 32 is not supplied with power, and the circuit breaker closing operation is blocked.

[6.3. effect]
According to the sixth embodiment as described above, the condition discriminating circuit according to the first to fifth embodiments can be applied in combination with the control circuit that blocks the circuit breaker closing operation, so that it is inexpensive and reliable. It is possible to easily realize a control circuit that blocks the operation of closing a circuit breaker having a high height.

FIG. 1 is a circuit diagram for determining a condition according to the first embodiment of the present invention. The contact input which concerns on the 1st Embodiment of this invention and shows the example of arrangement | positioning of the switching contact 18 calculated on condition that the contact input M is 1-7 pieces and the contact number N to turn ON is 1-7, Number of contacts that turn on In the condition discriminating circuit according to the first embodiment of the present invention having the arrangement of the switching contacts 18 of FIG. 2, 1 to 7 contact inputs M and 1 to 7 contact points N to be turned on are provided. Figure showing the total number of required switching contacts calculated in step 1 compared with the prior art The circuit diagram which shows the operation example of the condition determination circuit which concerns on the 1st Embodiment of this invention Condition determination circuit diagram according to the second embodiment of the present invention Condition discrimination circuit diagram according to the third embodiment of the present invention Condition discrimination circuit diagram according to the fourth embodiment of the present invention Condition discrimination circuit diagram according to the fifth embodiment of the present invention Condition discrimination circuit diagram according to the sixth embodiment of the present invention Single line connection diagram showing an example of GIS which is one of substation equipment Conventional condition determination circuit diagram

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Control panel 2 ... Circuit breaker 3 ... Disconnector 4 ... Grounding switch 11 ... Equipment state contact 12, 17, 27, 29, 31 ... Relay relay 13 ... a contact 14 ... b contact 15, 16, 19-25 ... output terminal 18, 30 ... switch contact 26 ... main transformer state contact 28 ... generator state contact 32 ... relay B contact 33 of relay 31... Closing control circuit

Claims (5)

It has a plurality of relays to which signals for detecting the operation state of the device are input,
A plurality of switching contacts are used for the plurality of relays,
A condition determination circuit that outputs when detecting a condition where the number of contacts that are ON among N contact inputs is N.
The plurality of switching contacts are connected in series in M corresponding to the number of contact inputs and N + 1 in parallel corresponding to the number of discriminating contacts to form an M-stage / N + 1-column matrix switching contact group. ,
The switching contacts belonging to the M + 1− (N−n) th and higher stages in the nth switching contact constituting the matrix, and the n−1th and lower stages in the nth switching contact. a switching contact, as unnecessary switching contact in the condition detected belonging to, Ri greens to eliminate from the matrix of switching contact groups,
An output terminal is connected to the break contact of the switching contact in the (N + 1) th column of the matrix . It has a plurality of relays to which signals for detecting the operation state of the device are input,
A plurality of switching contacts are used for the plurality of relays,
A condition determination circuit that outputs when detecting a condition that the number of contacts that are turned ON among M contact inputs is N or more,
The plurality of switching contacts are connected in series in M corresponding to the number of contact inputs and N + 1 in parallel corresponding to the number of discriminating contacts to form an M-stage / N + 1-column matrix switching contact group. ,
The switching contacts belonging to the M + 1− (N−n) th and higher stages in the nth switching contact constituting the matrix, and the n−1th and lower stages in the nth switching contact. And switching contacts belonging to the above-mentioned matrix-shaped switching contact group as switching contacts unnecessary for the above condition detection,
An output terminal is connected to the make and break contacts of the switching contact of the (N + 1) th column constituting the matrix. It has a plurality of relays to which signals for detecting the operation state of the device are input,
A plurality of switching contacts are used for the plurality of relays,
A condition determination circuit that outputs when a number of contact values that are ON among M contact inputs is a plurality of specific values including a maximum value of N and a minimum value of N ′,
The plurality of switching contacts are connected in series in M corresponding to the number of contact inputs and N + 1 in parallel corresponding to the number of discriminating contacts to form an M-stage / N + 1-column matrix switching contact group. ,
The switching contacts belonging to the M + 1− (N′−n) th and higher stages in the switching contacts of the nth column constituting the matrix, and the n−1th and lower levels of the switching contacts of the nth column are the same. a switching contact which belongs to stage, as unnecessary switching contact of the condition detection, Ri Na to eliminate from the matrix of switching contact groups,
An output terminal is connected to the break contact of the switching contact in the (N + 1) th column of the matrix . It has a plurality of relays to which signals for detecting the operation state of the device are input,
A plurality of switching contacts are used for the plurality of relays,
A condition determination circuit that outputs when a condition is detected in which the number of contacts that are ON among N contact inputs is N or less,
The plurality of switching contacts are connected in series in M corresponding to the number of contact inputs and N + 1 in parallel corresponding to the number of discriminating contacts to form an M-stage / N + 1-column matrix switching contact group. ,
The n-th column of the switching contact switching contact points belonging to n-1 stage following stages in constituting the matrix as unnecessary switching contact of the condition detection, Ri Na to eliminate from the matrix of switching contact groups ,
An output terminal is connected to the break contact of the switching contact in the (N + 1) th column of the matrix . It has a plurality of relays to which signals for detecting the operation state of the device are input,
A plurality of switching contacts are used for the plurality of relays,
When detecting the condition that the number of contacts that are turned ON among M contact inputs is N or less or greater than N,
The plurality of switching contacts are connected in series in M corresponding to the number of contact inputs and N + 1 in parallel corresponding to the number of discriminating contacts to form an M-stage / N + 1-column matrix switching contact group. A condition discriminating circuit that eliminates unnecessary switching contacts for condition detection from these switching contact groups,
The unnecessary switching contact is a switching contact belonging to the (n−1) th stage or less among the switching contacts of the nth column constituting the matrix,
An output terminal is connected to a break contact of each of the switching contacts up to the (N + 1) th column constituting the matrix and a make contact of the switching contact of the (N + 1) th column, respectively.

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