JP2017112742A - Loop support device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To select a highly reliable adjustment facility suitable for loop restoration at an early stage without being affected by operator's experience and intuition.SOLUTION: In the case that loop-off occurs in a loop system, a control center system is configured to acquire information on each line and each adjustment facility from a database, perform a series of calculations on the basis of a phase difference Δθ and a voltage difference ΔV calculated according to a DC method to select an adjustment facility on the basis of the acquired information, and after that, output an operation slip being a series of calculation results in the case that the adjustment facility selected on the basis of the calculation results according to the DC method is determined to be adequate on the basis of a phase difference Δθ' and a voltage difference ΔV' calculated according to the DC method.SELECTED DRAWING: Figure 8

Description

  The present invention relates to a loop support device that supports an operator's operation for loop recovery in a loop system.

  In the transmission line loop system, when the circuit breaker trips due to an accident or the like and the loop is turned off, the operation is restored to the loop state by turning on the circuit breaker tripped by the operator. Conventionally, for example, an allowable range of a phase difference or a voltage difference at a loop point is determined in an operation procedure or the like, thereby suppressing a shock to the system due to an excessive cross current during the loop operation.

  When the phase difference or voltage difference at the loop point is out of the allowable range, it is necessary to adjust the phase difference and the voltage difference in an adjustment facility such as a phase adjusting device or a generator in the loop system. Regulating equipment varies in the presence or absence of capacity, capacity, etc. for each electric station. In addition, accidents that cause loop-off are due to natural phenomena, and it is difficult to predict the time and point of the accident in advance, and the phase difference and voltage difference at the loop point differ depending on the operating conditions of the load and adjustment equipment. For this reason, it has been difficult to assume in advance. In view of the current situation, conventionally, every time an accident occurs, the operator has studied the operation of the adjustment facility by hand calculation.

  As a related technique, conventionally, for example, a technique in which a circuit breaker calculates a phase difference at a trip point and determines that loop switching is possible within a loop allowable range (see, for example, Patent Document 1 below) ) And a technique (for example, refer to Patent Document 2 below) that stabilizes the power system with the adjustment facility when a failure occurs. Conventionally, for example, there has been a technique in which a phase difference is calculated when a power system is looped, and the quality of the loop is output based on the calculation result (see, for example, Patent Document 3 below).

JP 2014-135812 A JP 2011-41354 A JP 2009-55705 A

  However, the above-described conventional technology has a problem that it is complicated and takes a long time because the operator examines the operation of the adjustment facility manually every time an accident occurs. In addition, in order to select the most effective adjustment equipment, an enormous amount of calculation is required, but it is difficult to make an enormous amount of calculation at the time of an accident that requires immediate recovery. If a large amount of calculations are performed to select the most effective adjustment equipment, leaving it in a loop-off state will cause a system separation or a large-scale power outage when the next accident occurs.

  For this reason, there is a situation in which the adjustment equipment must be selected based on the experience and intuition of the operator for quick recovery, and there is a need to improve the reliability and safety of power system operation. was there.

  Even if the phase difference or voltage difference is within the allowable range, it is necessary to minimize the shock to the system at the time of loop recovery for stable power supply. However, due to the time required for examination, there is still a situation in which adjustment equipment must be selected based on the experience and intuition of the operator, and there is a current situation that there is a need to improve the reliability and safety of power system operation. It was.

  In addition, the conventional technique described in Patent Document 1 described above is a technique in which a different system is looped at a target point on the basis of a phase difference in a part where the system is looped off in advance. There was a problem that could not be applied.

  In addition, the conventional technique described in Patent Document 2 described above is a technique for determining the adjustment amount of the adjustment facility in advance assuming the accident location, and predicting the accident location, occurrence time, and tidal current state. However, there was a problem that it could not be applied to difficult systems. In addition, this prior art is suitable for large-capacity power systems because it adjusts the phase adjustment device after confirming the recovery of the generator internal phase angle and electrical bus voltage. There was a problem that I could not.

  Further, when the actual loop is restored, there is a case where the phase difference is greatly separated and the loop cannot be performed, but the conventional technique described in the above-mentioned Patent Document 3 only shows the result of the pass / fail judgment for the loop, When the phase difference is far away and the loop cannot be taken into consideration, there is a problem that the practicality is inferior.

  The present invention eliminates the problems caused by the prior art described above, and therefore, loop support that enables early selection of highly reliable adjustment equipment suitable for loop restoration without being influenced by the experience and intuition of the operator. An object is to provide an apparatus.

  In order to solve the above-described problems and achieve the object, the loop support apparatus according to the present invention is any one in a loop system in which a plurality of lines are connected in a ring shape via a plurality of adjustment facilities provided between the lines. When the line is disconnected, an acquisition unit that acquires information on each line and each adjustment facility, and a phase difference and a voltage difference at both ends of the disconnected line are determined based on the information acquired by the acquisition unit. Calculated by the first calculation means calculated according to the law, the second calculation means for calculating the adjustment capability of each adjustment facility based on the information acquired by the acquisition means, and the second calculation means Based on the calculation result, a third calculation means for calculating the adjustment degree of each adjustment facility with respect to the adjustment capability of each adjustment facility, the first calculation means, and the third calculation hand Based on the calculation result calculated by the above, a selection unit that selects an adjustment facility to be operated to restore the loop system to a loop state from the plurality of adjustment facilities, and the adjustment facility selected by the selection unit The fourth calculation means for calculating the phase difference and the voltage difference at both ends of each line according to the alternating current method and the calculation result calculated by the fourth calculation means when the loop system is restored by operating And output means for outputting information on the adjustment equipment selected by the selection means.

  In the loop support device according to the present invention, in the above invention, the selection means includes a total of the adjustment degrees included in a plurality of combination patterns including one or more adjustment degrees calculated by the third calculation means. A combination pattern in which an adjustment value obtained by dividing the value from the phase difference and potential difference calculated by the first calculation means becomes 0 or minimum is specified, and the adjustment degree included in the specified combination pattern is determined. Such adjustment equipment is selected.

  In the loop support apparatus according to the present invention as set forth in the invention described above, the output means further outputs information related to a calculation result calculated by the second calculation means and the third calculation means. And

  Further, in the above invention, the loop support apparatus according to the present invention includes an input unit that receives an input operation, a content of the input operation received by the input unit, and a calculation result calculated by the fourth calculation unit. Based on the determination means for determining the reliability of the input operation, based on the determination result by the determination means, a control signal output means for outputting a control signal for the corresponding adjustment equipment among the plurality of adjustment equipment, It is provided with.

  According to the loop support device of the present invention, there is an effect that a highly reliable adjustment facility suitable for loop restoration can be selected at an early stage without being influenced by the experience and intuition of the operator.

It is explanatory drawing which shows an example of the electric power grid | system to which a loop assistance system is applied. It is explanatory drawing which shows the system configuration | structure of a loop assistance system. It is a block diagram which shows the structure of a control center system. It is explanatory drawing which shows an example of an adjustment capability list. It is explanatory drawing which shows an example of an adjustment table. It is explanatory drawing which shows an example of an operation slip. It is a flowchart which shows the process sequence of a control center system. It is explanatory drawing which shows the specific calculation example of the process by a control center system.

  Exemplary embodiments of a loop support apparatus according to the present invention will be explained below in detail with reference to the accompanying drawings.

(Example of power system)
First, an example of a power system to which the loop support system of the embodiment including the loop support device according to the present invention is applied will be described. FIG. 1 is an explanatory diagram illustrating an example of an electric power system to which the loop support system is applied.

  In FIG. 1, an electric power system 100 is a network composed of various types of equipment such as power generation equipment, power transmission equipment, substation equipment, power distribution equipment, and customer equipment, and performs from production to consumption of electric power. The loop support system according to the embodiment of the present invention (see reference numeral 200 in FIG. 2) is applied to the loop system in the entire power system 100.

  The loop system constitutes a part of the power system 100 and is configured by connecting electrical stations such as substations in a ring shape. There may be one loop system in one power system 100, or a plurality of loop systems may exist. In FIG. 1, a power system 100 including N loop systems from loop system 1 to loop system N is shown. When the power system 100 includes a plurality of loop systems, the loop support system monitors each loop system.

  The loop system 1 is configured by connecting substations (electrical stations) A to F in a ring shape. Specifically, the bus 110 of the A substation is connected to the bus 120 of the B substation and the bus 160 of the F substation, and the bus 120 of the B substation is connected to the bus 110 of the A substation and the bus 130 of the C substation. Has been. In addition, the bus 130 of the C substation is connected to the bus 120 of the B substation and the bus 140 of the D substation, and the bus 140 of the D substation is connected to the bus 130 of the C substation and the bus 150 of the E substation. Yes. Also, the bus 150 of the E substation is connected to the bus 140 of the D substation and the bus 160 of the F substation, and the bus 160 of the F substation is connected to the bus 150 of the E substation and the bus 110 of the A substation. Yes. In the loop system 1, Vi (i = 1 to 6) represents the bus voltage of each substation. Specifically, in the loop system 1, the bus voltage of each of the substations A to F is shown as V1 to V6, respectively.

  The buses 110 to 160 at each substation are connected by power transmission lines. In the loop system 1, a power transmission line connecting the bus 110 of the A substation and the bus 120 of the B substation is “AB line”, and a power transmission line connecting the bus 120 of the B substation and the bus 130 of the C substation. Is shown as “BC line”. Further, in the loop system 1, the transmission line connecting the bus 130 of the C substation and the bus 140 of the D substation is “CD line”, and the bus 140 of the D substation and the bus 150 of the E substation are connected. The power transmission line is shown as “DE line”. In the loop system 1, the transmission line connecting the bus 150 of the E substation and the bus 160 of the F substation is “EF line”, and the bus 160 of the F substation and the bus 110 of the A substation are connected. The power transmission line is shown as “FA line”.

  In the loop system 1, Xi indicates the line reactance of each line from AB line to FA line. Specifically, in the loop system 1, the line reactances of the AB line, the BC line, the CD line, the DE line, the EF line, and the FA line are shown as X1, X2, X3, X4, X5, and X6, respectively.

  The A substation can be supplied with electric power generated by a power plant other than the loop system 1 in the power system 100 via the instrument transformer 101. In the loop system, during normal times, there is a current flow in the direction of A substation → B substation → C substation → D substation → E substation → F substation. In the loop system 1, Pli indicates the line flow of each line. Specifically, in the loop system 1, the line flows of the AB line, the BC line, the CD line, the DE line, the EF line, and the FA line are indicated as Pl1, Pl2, Pl3, Pl4, Pl5, and Pl6, respectively. ing.

  The buses 120 to 160 of the substations B to F are respectively provided with an SC (Shunt Capacitor), a ShR (Shunt Reactor), and a generator (Generator: in FIG. 1). Etc.) are connected. Each substation constituting the loop system is provided with a TC (Technical Committee). The SC, ShR, generator, etc. also function as adjustment equipment (adjustment device) in a loop restoration process described later.

  Note that the loop system to be applied by the loop support system is not limited to one in which TCs are installed in all substations. The loop support system can also be applied to a loop system in which TCs are installed only in some of the substations constituting the loop system. In this case, the SC, ShR, generator, etc. of the substation where the TC is installed function as adjustment equipment (adjustment device).

  In the loop system 1, Qlmaxi indicates the ShR capacity at each substation. Specifically, in the loop system 1, the ShR capacity of the B substation is indicated as Qlmax2, the ShR capacity of the C substation is indicated as Qlmax3, and the ShR capacity of the D substation is indicated as Qlmax4. In the loop system 1, the ShR capacity of the E substation is indicated as Qlmax5, and the ShR capacity of the F substation is indicated as Qlmax6.

  In the loop system 1, Qcmaxi indicates the SC capacity at each substation. Specifically, in the loop system 1, the SC capacity of the B substation is indicated as Qcmax2, the SC capacity of the C substation is indicated as Qcmax3, and the SC capacity of the D substation is indicated as Qcmax4. In the loop system 1, the SC capacity of the E substation is indicated as Qcmax5, and the SC capacity of the F substation is indicated as Qcmax6.

  In the loop system 1, Pmaxi indicates the generator capacity at each substation. Specifically, in the loop system 1, the generator capacity of the B substation is indicated as Pmax2, the generator capacity of the C substation is indicated as Pmax3, and the generator capacity of the D substation is indicated as Pmax4. In the loop system 1, the generator capacity of the E substation is indicated as Pmax5, and the generator capacity of the F substation is indicated as Pmax6.

  Also, loads are connected to the buses of the substations B to F, respectively. In the loop system 1, Pdi indicates the load power connected to the bus of each substation. Specifically, in loop system 1, the load power connected to bus 120 of B substation is connected to Pd2, the load power connected to bus 130 of C substation is connected to Pd3, and bus 140 of D substation is connected. The load power is indicated as Pd4. In the loop system 1, the load power connected to the bus 150 of the E substation is indicated as Pd5, and the load power connected to the bus 160 of the F substation is indicated as Pd6.

(System configuration of loop support system)
Next, the system configuration of the loop support system will be described. FIG. 2 is an explanatory diagram showing the system configuration of the loop support system. In FIG. 2, the loop support system 200 is configured by a control station system 210 and a TC 220 installed in each substation. The control center system 210 and each TC 220 can be realized by, for example, a general-purpose computer device. The control center system 210 implements a loop support apparatus according to the present invention.

  Each TC 220 is communicably connected to the control center system 210 via the communication network 201. Each TC 220 includes a short-circuit capacity Psi at a substation where each TC 220 is installed, a bus voltage Vi, a current generator output Pi, an operating state of SC and ShR (on / off state), a current ShR output Qli, The current SC output Qci and the like are output to the control center system 210. In addition, each TC 220 is a predetermined unit that adjusts the operating state of the adjustment facility with respect to the adjustment facility such as SC, ShR, and generator based on the control signal output from the control center system 210 during the loop restoration process. The adjustment signal is output.

  The control center system 210 includes a database (see FIGS. 3, 4, 5, and 6) that stores various types of information. The database stores, for example, generator capacity Pmaxi, ShR capacity Qlmaxi, and SC capacity Qcmaxi at each substation. Further, the database stores, for example, line reactance Xi for each loop system, reference voltage Vb for each loop system, and the like. Further, the database stores, for example, the generator startup time s at each substation. The database may store, for example, the time until preparation of the phase adjusters (ShR, SC) at each substation is completed.

  The database further includes various information such as the short-circuit capacity Psi at the substation, the bus voltage Vi, the current generator output Pi, the operating state (ON / OFF state) of the SC and ShR, the current ShR output Qli, the current SC output Qci, etc. May be acquired from each TC 220 and the acquired various types of information may be stored for each substation. In this case, the database may store various types of acquired information in association with the date and time when the information is acquired.

  The control center system 210 constantly monitors the power flow of the entire power system 100 and the operating state of the adjustment facility, and stores the data of the accident location in the database when an accident such as a loop-off occurs. The control center system 210 may store data in the database not only at the time of the occurrence of an accident, but also at regular intervals or every predetermined time.

(Configuration of control station system 210)
Next, the configuration of the control center system 210 will be described. FIG. 3 is a block diagram showing a configuration of the control center system 210. In FIG. 3, the control center system 210 includes an input unit 301, a database unit 302, a calculation unit 303, and an interface unit 304.

  The input unit 301 receives input of various information used for control by the loop support system 200 from each TC 220. The input unit 301 can be realized by an information collection and distribution device, for example. The information collection and distribution device receives various information transmitted from each TC 220 by communicating with the TC 220 according to a control program installed in advance.

  In addition, the information collection and distribution apparatus outputs a predetermined control signal to the TC 220 according to a control program installed in advance or according to an input operation by an operator of the control center system 210. Specifically, for example, in the loop recovery process, the information collection and distribution apparatus outputs a predetermined control signal related to the adjustment of the operation state of the corresponding adjustment facility by the TC 220 to the TC 220 corresponding to the corresponding adjustment facility. To do. More specifically, the information collection and distribution apparatus outputs a control signal for controlling on / off of ShR and SC, a control signal for adjusting the operation of the generator, and the like to the corresponding TC 220.

  The database unit 302 stores various information used for control by the loop support system 200. The database unit 302 includes, for example, the above database and stores various types of information in the database. The database unit 302 can be realized by, for example, a main storage device included in a computer device that realizes the control center system 210 or an auxiliary storage device connected to the computer device that realizes the control center system 210. The main storage device and the auxiliary storage device can be realized by various known storage devices (storage media) such as a hard disk, a flash memory, and a magneto-optical disk.

  The calculation unit 303 performs various calculation processes related to control by the loop support system 200. For example, when the loop off occurs in the loop system, the arithmetic unit 303 performs various arithmetic processes related to the loop recovery process for recovering the loop state (recovering the loop). Specifically, the calculation unit 303 performs calculation processing related to creation of an adjustment capability list, adjustment table, operation slip, and the like. In addition, the calculation unit 303 performs a loop restoration process in accordance with, for example, various types of calculation processes and input operations by the operator.

  The computing unit 303 can be realized by, for example, a CPU (Central Processing Unit) provided in a computer device that implements the control center system 210. The CPU may be a multi-core such as a dual core or a quad core, or a single core. The control center system 210 may perform various arithmetic processes related to the control by the loop support system 200 using a plurality of computer devices in a distributed manner.

  The interface unit 304 outputs various types of information according to the calculation result by the calculation unit 303. The interface unit 304 can be realized by a display, for example. The interface unit 304 realized by a display outputs various information such as an adjustment capability list, an adjustment table, an operation slip, a phase difference and a voltage difference created by the calculation unit 303. Further, the interface unit 304 receives an input operation by an operator and outputs a signal corresponding to the input operation to the calculation unit 303. The interface unit 304 can be realized by, for example, a pointing device such as a mouse, a keyboard, a touch panel, or the like.

(Example of adjustment capability table)
Next, an example of the adjustment capability list will be described. FIG. 4 is an explanatory diagram showing an example of the adjustment capability list. The adjustment capability list 400 is created for each loop system. The adjustment capability list 400 is created for the loop system in which the loop-off has occurred. As shown in FIG. 4, the adjustment capability list 400 shows the adjustment capability of each substation in the loop system where the loop-off has occurred. The adjustment capability of each substation can be calculated based on the generator adjustment capability Pri of each substation, the ShR adjustment capability Qlri of each substation, and the SC adjustment capability Qcri of each substation.

The generator adjustment capability Pri of each substation can be calculated based on the generator capacity Pmaxi of each substation and the current generator output Pi of each substation (when the loop-off occurs). Specifically, the generator adjustment capability Pri can be calculated by the following equation (1).
Pri = Pmaxi−Pi (1)

The ShR adjustment capability Qlri of each substation can be calculated based on the ShR capacity Qlmaxi of each substation and the current ShR output Qli (when loop-off occurs). Specifically, the ShR adjustment capability Qlri can be calculated by the following equation (2).
Qlri = Qlmaxi−Qli (2)

The SC adjustment capability Qcri of each substation can be calculated based on the SC capacity Qcmaxi of each substation and the current SC output Qci (when the loop-off occurs). Specifically, the SC adjustment capability Qcri can be calculated by the following equation (3).
Qcri = Qcmaxi−Qci (3)

(Example of adjustment table)
Next, an example of the adjustment table will be described. FIG. 5 is an explanatory diagram showing an example of the adjustment table. The adjustment table is created for each loop system. In addition, the adjustment table is created for a loop system in which loop-off has occurred. As shown in FIG. 5, the adjustment table 500 indicates the degree of adjustment (change amount) with respect to the adjustment capability of each substation in the loop system where the loop-off has occurred.

  The adjustment capability of each substation can be acquired based on the adjustment capability list 400 described above. The degree of adjustment with respect to the adjustment capability of each substation can be calculated based on the adjustment degree dθ based on the phase difference at the place where the loop is performed (loop restoration place) and the adjustment degree dV based on the voltage difference at the loop restoration place. it can. When creating the adjustment table 500, the degree of adjustment with respect to the adjustment capability of each substation is calculated using a place where there is a possibility of looping, that is, a place equipped with an adjustment facility such as a generator, ShR, or SC as a loop restoration place. To do.

  The adjustment degree dV based on the voltage difference at the loop restoration point is expressed by the adjustment degree dVli calculated based on the ShR adjustment ability Qlri and the adjustment degree dVci calculated based on the SC adjustment ability Qcri. The control center system 210 uses the adjustment degree dVci calculated based on the ShR adjustment ability Qlri and the adjustment degree dVci calculated based on the SC adjustment ability Qcri to indicate an adjustment degree indicating a positive value as a loop recovery point. An adjustment table 500 having an adjustment degree dV based on the voltage difference is created.

  In addition, the adjustment table 500 indicates the adjustment order that determines the priority order of the loop restoration locations in addition to the adjustment degree dθ based on the phase difference and the adjustment degree dV based on the voltage difference. The adjustment order is determined based on the adjustment degree dθ based on the phase difference at the loop restoration point and the adjustment degree dV based on the voltage difference at the loop restoration point.

The adjustment degree dθ based on the phase difference at the loop restoration point can be calculated based on the generator adjustment capability Pri of each substation and the reactance Xi of each line. Specifically, the adjustment degree dθ based on the phase difference can be calculated by the following equation (4). In Expression (4), k represents a constant used for calculating the adjustment degree dθ based on the phase difference, and is specifically 17.45.
dθ = Pri * Σ (Xi) / k (4)

The adjustment degree dθ based on the phase difference calculated by the equation (4) is used for calculating the priority evaluation value ΔY of the generator at each substation. The generator priority evaluation value ΔY is calculated based on the adjustment degree dθ based on the phase difference, the constant k (k = 10), and the generator startup time s. Specifically, the priority evaluation value ΔY of the generator can be calculated by the following equation (5). As the generator start time s, 1 is substituted when the generator is in operation.
ΔY = Δθ + k / s (5)

  As can be seen from the equation (5), the priority evaluation value ΔY of the generator depends on the adjustment degree dθ based on the phase difference at the loop restoration point. Therefore, the adjustment table 500 shown in FIG. 5 does not include the priority evaluation value ΔY of the generator, and the index value for selecting the generator to be adjusted according to the adjustment degree dθ based on the phase difference at the loop restoration point. Is shown.

Of the adjustment degree dV based on the voltage difference at the loop recovery point, the adjustment degree dVli calculated based on the ShR adjustment capability Qlri includes the short-circuit capacity Psi of each substation, the ShR adjustment capability Qlri of each substation, Can be calculated on the basis of the bus voltage Vi of each location and the reference voltage Vb for each loop system. Specifically, the adjustment degree dVli can be calculated by the following equation (6).
dVli = (Psi / (Psi + Qlri) −1) * Vi / Vb * 100
... (6)

Of the adjustment degree dV based on the voltage difference at the loop recovery point, the adjustment degree dVci calculated based on the SC adjustment capacity Qcri is the short-circuit capacity Psi of each substation, the SC adjustment capacity Qcri of each substation, and each substation. Can be calculated on the basis of the bus voltage Vi of each location and the reference voltage Vb for each loop system. Specifically, the adjustment degree dVci can be calculated by the following equation (7).
dVci = (Psi / (Psi + Qcri) −1) * Vi / Vb * 100
... (7)

(Example of operation slip)
Next, an example of the operation slip will be described. FIG. 6 is an explanatory diagram illustrating an example of an operation slip. The operation slip is created for each loop system and indicates a procedure for recovering from the loop-off state due to an accident or the like to the loop state. The operation slip is created for the loop system in which the loop-off has occurred. As illustrated in FIG. 6, the operation slip 600 indicates an adjustment facility selected for use in loop restoration among the adjustment facilities in the loop system in which the loop-off has occurred. FIG. 6 shows that the generators of the C to F substations, the SC of the C substation, and the ShR of the B substation are selected as the adjustment facilities. Further, the operation slip 600 shows the selected adjustment facilities in descending order of priority.

  The adjustment facility is selected based on the adjustment table 500 described above. Specifically, the adjustment facility is selected based on the adjustment table 500 so that the adjustment value becomes 0 or the minimum. The adjustment value is indicated by an absolute value, and the control center system 210 selects the adjustment equipment that minimizes the adjustment value (absolute value). The adjustment value is divided into an adjustment value based on the phase difference and an adjustment value based on the voltage difference. The adjustment value based on the phase difference can be calculated based on the phase difference Δθ and the adjustment degree dθ based on the phase difference. The adjustment value based on the voltage difference can be calculated based on the voltage difference ΔV and the adjustment degree dV based on the voltage difference.

  For example, when calculating the adjustment value based on the phase difference, first, a combination pattern including all five generators of the BF substations, a combination pattern including any four generators, and any three generators are included. From the combination pattern, the combination pattern including any two generators, and the combination pattern including any one generator, the total value of the adjustment degree dθ by each combination pattern is calculated. Then, the total value of the adjustment degrees dθ by each combination pattern is subtracted from the phase difference Δθ, and the subtracted value is used as the adjustment value for each combination pattern. When creating the operation slip 600, among the adjustment facilities, the generator constituting the combination pattern for calculating the adjustment value that becomes 0 or the minimum among the adjustment values of each combination pattern is selected as the generator to be adjusted. To do.

  For example, when calculating the adjustment value based on the voltage difference, first, a combination pattern including all five ShR (or SC) of the BF substations, a combination pattern including any four ShR (or SC), A combination pattern including any three ShR (or SC), a combination pattern including any two ShR (or SC), or a combination pattern including any one ShR (or SC), depending on each combination pattern The total values of the adjustment degrees dV (dVli, dVci) are calculated. Then, the total value of the adjustment degree dV by each combination pattern is subtracted from the voltage difference ΔV, and the subtracted value is set as the adjustment value of each combination pattern. When creating the operation slip 600, ShR (or SC) that constitutes a combination pattern for calculating an adjustment value that becomes 0 or the minimum among the adjustment values of each combination pattern in the adjustment equipment is ShR that is an adjustment target. (Or SC).

  When calculating the adjustment value, the adjustment value may be calculated from a combination pattern in which the number of adjustment facilities (generator, ShR or SC) constituting the combination pattern is small. That is, first, the adjustment value of the combination pattern including any one of the five ShRs (or SCs) of the BF substations is calculated, and finally, all the ShRs (or SCs) are calculated. The adjustment value of the combination pattern to be included may be calculated. Thereby, when a combination pattern with an adjustment value of 0 is found, calculation of the adjustment value used for creating the operation slip 600 can be omitted.

(Influence on loop system when loop is restored)
Next, the influence on the loop system at the time of loop restoration will be described. As an example of the description, it is assumed that the voltage on one side of the opened switch is V1, the phase is θ1, the voltage on the other side of the switch is V2 (V2> V1), and the phase is θ2. To explain.

  In such a case, when the switch is closed, depending on the magnitude of the voltage difference (voltage effective value difference): V2-V1 and the phase difference: θ2-θ1, excessive load is applied to the electrical equipment in the loop system due to the loop cross current. Overload relay will operate. In addition, the voltage in the loop system is suddenly accelerated and decelerated, and the generator is adversely affected, or the voltage in the loop system is suddenly changed to cause abnormality in the power plant auxiliary equipment. For this reason, when a loop-off occurs in the loop system, it is required to restore the loop so that the above-described problems do not occur.

  The phase difference and the voltage difference have a correlation. When the phase difference is large, the voltage difference is large, and when the phase difference is small, the voltage difference is small. That is, when a loop-off occurs in the loop system, the loop recovery may be performed with a phase difference that is small enough not to cause the above-described problem in order to suppress a shock applied to the loop system by the loop recovery. The phase difference can be adjusted by adjusting the generator output. For example, when the generator output is increased, the phase difference is reduced.

  The voltage difference also depends on the voltage effective value difference. When the voltage effective value difference is large, the voltage difference is large, and when the voltage effective value difference is small, the voltage value difference is also small. That is, when a loop-off occurs in the loop system, the loop recovery may be performed with a small voltage difference that does not cause the above-described problem in order to suppress a shock applied to the loop system by the loop recovery. The voltage difference can be adjusted by adjusting on / off of a phase adjuster such as ShR or SC. For example, when ShR is turned on, the voltage in the loop system decreases. For example, when the SC is turned on, the voltage in the loop system increases.

  In the loop system, even if the generator output is the same, the adjustment force differs depending on the accident point (the location where the loop-off occurs). Further, in the loop system, even if the phase adjuster is the same, the short-circuit capacity differs depending on the accident point (location where the loop-off occurs), and the adjustment force differs. An accident that causes a loop-off occurs due to a natural phenomenon, and it is difficult to predict the accident time and point in advance. Further, in an actual loop system (power system 100), the installed adjustment equipment, the operation state of the adjustment equipment, and the presence / absence of installation of the adjustment equipment differ for each electric station such as a substation. For this reason, it is difficult to assume in advance the loop recovery point and the phase difference and voltage difference of the loop recovery point.

  In the past, each time an accident occurred, the operator manually operated the adjustment equipment, which was cumbersome and took a long time. Moreover, enormous calculations are required to select the most effective adjustment equipment, and it is difficult to obtain the calculation results immediately. When an accident occurs, it is necessary to restore the loop system as soon as possible, so it is difficult to secure time for performing sufficient calculations for selecting the most effective adjustment equipment. Under such circumstances, conventionally, there are cases where the adjustment equipment is selected based on the experience and intuition of the operator, and a method for selecting the adjustment equipment based on accurate calculation results has been desired. The loop support system 200 according to the present invention can quickly select an adjustment facility suitable for loop restoration based on an accurate calculation result by the processing described below.

(Processing procedure of control station system 210)
Next, a processing procedure of the control center system 210 will be described. FIG. 7 is a flowchart showing the processing procedure of the control center system 210. In the flowchart of FIG. 7, first, the process waits until it is determined whether any system fault has occurred in any of the loop systems in the power system 100 (step S701: No).

  If a system fault has occurred in step S701 (step S701: Yes), the loop system in which the system fault has occurred is identified (step S702), and information (specifications) on the adjustment equipment and the line related to the identified loop system is acquired. (Step S703). In step S703, for example, by reading the corresponding information (specifications) from the database, it is possible to acquire the specifications of the adjustment equipment and the line related to the identified loop system.

  Next, the phase difference Δθ at the loop restoration point and the voltage difference ΔV at the loop restoration point are calculated (step S704). In step S704, the phase difference Δθ in the loop system in which the loop off has occurred and the voltage difference ΔV of the line in which the loop off has occurred in the loop system are calculated.

Specifically, the phase difference Δθ at the loop restoration point can be calculated by the following equation (8), and the voltage difference ΔV at the loop restoration point can be calculated by the following equation (9).
Δθ = Σ (Pli * Xi) /17.45 (8)
ΔV = (Vi−V (i + 1)) / Vb * 100 (9)

  Moreover, based on the specifications acquired in step S703, the adjustment capability by the adjustment equipment of each substation is calculated, and the adjustment capability list 400 is created (step S705). In step S705, the generator adjustment capacity Pri, ShR adjustment capacity is obtained by performing the calculations of the above-described equations (1) to (3) using the generator capacity Pmaxi, ShR capacity Qlmaxi, and SC capacity Qcmaxi read from the database. Qlri and SC adjustment capability Qcri are calculated. Then, the adjustment capability list 400 is created based on the calculation result.

  Next, the adjustment table 500 is created based on the adjustment capability list 400 created in step S705 (step S706). In step S706, the above-described equations (4), (6), and (7) are calculated using the generator adjustment capability Pri, ShR adjustment capability Qlri, and SC adjustment capability Qcri in the adjustment capability table 400, An adjustment degree dθ based on the phase difference of the looped part (loop recovery part) and an adjustment degree dV based on the voltage difference are calculated by turning on and off the adjustment equipment of each substation. Then, the adjustment order is determined based on the calculation result, and the adjustment table 500 is created based on the calculated adjustment degrees dθ and dV and the determined adjustment order.

  Next, an adjustment facility is selected based on the adjustment table 500 created in step S706, and an operation slip 600 is created (step S707). In step S707, the adjustment equipment is selected such that the adjustment degrees dθ and dV in the adjustment table 500 are 0 or minimum.

  In step S707, for example, when a generator is selected based on the phase difference, adjustment values for all combination patterns of generators that are turned on and off in the loop system that is the target of the loop restoration process are calculated, and the calculated adjustments are calculated. The combination pattern of generators whose value is 0 or minimum is specified. Thereafter, the generator included in the identified combination pattern is selected as a generator to be adjusted.

  In step S707, for example, when ShR (or SC) is selected based on the voltage difference, adjustments are applied to all combination patterns of ShR (or SC) that are turned on and off in the loop system that is the target of the loop recovery process. A value is calculated, and a combination pattern of Shr (or SC) in which the calculated adjustment value is 0 or minimum is specified. Thereafter, Shr (or SC) included in the identified combination pattern is selected as Shr (or SC) to be adjusted.

  Next, the line power flow when the loop restoration process is performed by operating the adjustment equipment selected in step S707 is calculated (step S708). In step S708, the line power flow is calculated by the AC method. In step S708, a predicted line current (simulation value) is calculated when it is assumed that the loop restoration process has been performed by operating the adjustment facility selected in step S707.

  Next, it is determined whether or not the phase difference Δθ ′ and voltage difference ΔV ′ calculated based on the line flow calculated in step S708 are within the adjustment range (step S709). The adjustment range is set in advance to suppress shocks to the system due to excessive cross current during loop operation. For example, the adjustment range is indicated by the angle range of the phase difference at the loop recovery point (loop point) or the voltage difference ratio. It is. Specifically, for example, the adjustment range is set such that “the phase difference at the loop recovery point (loop point) is within 30 °”, “the voltage difference at the loop recovery point (loop point) is within 10%”, and the like. .

  In step S709, the phase difference Δθ ′ and the voltage difference ΔV ′ are calculated by performing the calculations of formulas (8) and (9) in the same manner as in step S704 based on the line power calculated in step S708. Can do. Then, it is determined whether or not the calculated phase difference Δθ ′ and voltage difference ΔV ′ are included in the adjustment range with respect to the phase difference Δθ and voltage difference ΔV calculated in step S704, respectively.

  If it is within the adjustment range in Step S709 (Step S709: Yes), the adjustment capability list 400 created in Step S705, the adjustment table 500 created in Step S706, and the operation slip 600 created in Step S707 are output (Step S709). S710). In step S710, the adjustment capability list 400, the adjustment table 500, and the operation slip 600 are displayed by being displayed on the interface unit 304 realized by a display. In step S710, predicted values (Δθ ′, ΔV ′) of the phase difference and the voltage difference may be further displayed.

  In operation of the loop support system 200, the operator confirms the contents of the adjustment capability list 400, the adjustment table 500, and the operation slip 600 displayed on the display, and finally confirms that there is no problem in the operation content indicated by the operation slip 600. to decide. If it is determined that there is no problem in the operation content indicated by the operation slip 600 as a result of the final determination, an input operation is performed according to the content of the operation slip 600. Specifically, the operator performs an input operation for turning on / off the adjustment equipment indicated in the operation slip 600 in the order indicated in the operation slip 600.

  The control center system 210 stands by until an input operation according to the operation slip 600 output in step S710 is performed (step S711: No), and when an input operation according to the operation slip 600 is performed (step S711: Yes). ), Control information is generated (step S712). In step S712, control information is generated for turning on / off the adjustment equipment selected in step S707 in the order indicated by the operation slip 600 created in step S707.

  In the control center system 210, in step S711, a time to wait until the input operation according to the operation slip 600 is performed is set, and the input operation according to the operation slip 600 is not performed within the set time. In addition, a warning may be output via the interface unit 304. Alternatively, the control center system 210 may output a warning via the interface unit 304 when an input operation according to the operation slip 600 is not performed.

  Thereafter, a control signal based on the control information generated in step S712 is output to the corresponding TC 220 (step S713), and the series of processing ends. In step S713, a control signal is output to each TC 220 corresponding to the adjustment facility selected in step S707.

  On the other hand, if it is determined in step S709 that it is not within the adjustment range (step S709: No), a warning is output via the interface unit 304 (step S714), and the series of processing ends. Step S709: The situation where it is determined that it is not within the adjustment range in No is, for example, when the calculation by the AC method does not converge and there is no solution, or is far from the expected values (phase difference Δθ, voltage difference ΔV). A case is assumed. In step S714, for example, a warning is output by displaying on the interface unit 304 realized by a display a message that indicates that it is not within the adjustment range.

  By performing the processing procedure shown in FIG. 7, the adjustment capability list 400, the adjustment table 500, the operation slip 600, and the predicted values of the phase difference and the voltage difference can be displayed on the display. As a result, the operator can easily understand the situation at the time of the loop, and can operate the adjustment equipment while looking at the operation slip 600 displayed on the display. As described above, the control station system 210 and the loop support system 200 are used to display the operation sheet 600 on the display and to allow the operator to perform an operation according to the operation sheet 600, thereby assisting the operator of the control station. The system can always be restored to the system while minimizing the adverse effects on the system during the loop.

  In addition, by using the control center system 210 and the loop support system 200, the operation form 600 shows the adjustment facilities in the order according to the priority order. Therefore, adjustment such as the introduction of the adjustment facilities is performed in the most effective order. be able to. As a result, adjustment (such as an operation for restoration) can be performed with the minimum number of adjustments, and shocks to the power system 100 and the loop system can be minimized.

  The control station system 210 and the loop support system 200 can be set so as to perform computation only in response to a power transmission line accident in the loop system and not to perform computation for a substation accident. Thereby, in the operation of the power system 100, the control station system 210 can be prevented from operating carelessly, and high certainty and high safety for the operation of the power system 100 can be ensured.

  The generator takes time to increase or decrease to an arbitrary output. For this reason, it is preferable that the database stores the time until the generator output is increased or decreased to an arbitrary output as data. As a result, when a generator is selected as the adjustment facility, the time until the generator reaches an arbitrary output can be taken into consideration, and the time until the system can minimize the shock to the system is reduced. Can be calculated. As a result, it is possible to assume a loop situation in consideration of the time required to prepare the generator and the phase adjuster. In addition, by taking into account the time until the generator and the phase adjuster are ready to be turned on, it is possible to reduce the shock caused by the calculation error during loop execution.

  According to the control center system 210 and the loop support system 200 as described above, since it takes time to calculate, since it was handled manually, adjustment facilities and timing for loop restoration can be determined only by the phase difference and voltage difference of the loop points. Compared to the conventional method that has been determined, all adjustment facilities in the loop system can be examined at high speed by computation using a computer device. Thereby, at the time of loop restoration, the shock of the system can be reduced, and the influence on the generator disconnection and the power consumer can be reduced.

(Specific calculation example)
Next, a specific calculation example of processing by the control center system 210 will be described. FIG. 8 is an explanatory diagram illustrating a specific calculation example of processing by the control center system 210. FIG. 8 shows specific values in the loop system 1 when the loop system 1 in FIG. 1 is a loop system to be subjected to loop restoration processing and an accident occurs on the BC line of the loop system 1. ing.

  In FIG. 8, the bus 110 voltage V1 of the A substation is 110.5 kV, the bus 120 voltage V2 of the B substation is 110 kV, the bus 130 voltage V3 of the C substation is 104.5 kV, and the bus 140 voltage V4 of the D substation is 105 kV, the bus 150 voltage V5 of the E substation is 107 kV, and the bus 160 voltage V6 of the F substation is 109 kV. Short circuit capacity Ps2 at B substation is 1050 MVA, short circuit capacity Ps3 at C substation is 900 MVA, short circuit capacity Ps4 at D substation is 950 MVA, short circuit capacity Ps5 at E substation is 1000 MVA, and short circuit capacity Ps6 at F substation is 1050 MVA. (The values of Ps1 to Ps5 are not shown).

  The generator capacities Pmax2 to Pmax6 of the substations B to F are all 10 MW. Each of the ShR capacities Qlmax2 to Qlmax6 of the substations B to F is 20 MW. Each of the SC capacities Qcmax2 to Qcmax6 of the substations B to F shows −20 MW. The load power Pd2 connected to the bus 120 of the B substation is 30 MW, the load power Pd3 connected to the bus 130 of the C substation is 20 MW, the load power Pd4 connected to the bus 140 of the D substation is 50 MW, and the E substation. The load power Pd5 connected to the local bus 150 is 30 MW, and the load power Pd6 connected to the F substation bus 160 is 40 MW.

  AB line track current Pl1 is 30 MW, BC line track current Pl2 is 0 MW, CD line track current Pl3 is -20 MW, DE line track current Pl4 is -70 MW, EF line track current Pl5 is -100 MW, FA line The line power flow Pl6 of −140 MW indicates −140 MW. The line reactances X1 to X6 all indicate 1%.

In such a loop system 1, when an accident occurs on the BC line, the phase difference Δθ and the voltage difference ΔV are calculated as follows by the calculations of the equations (8) and (9).
Δθ = Σ (Pli * Xi) /17.45 (8)
= 1 * (30-20-70-100-140) /17.45
≒ -17.2 °
ΔV = (Vi−V (i + 1)) / Vb * 100 (9)
= (110-104.5) / 110 * 100
= 5%

When the adjustment capability list 400 is created, the generator adjustment capability Pri, the ShR adjustment capability Qlri, and the SC adjustment capability Qcri are calculated by the calculations of the equations (1) to (3) as follows. Here, as an example, a calculation example of the generator adjustment capability Pr2, the ShR adjustment capability Qlr2, and the SC adjustment capability Qcr2 at the B substation is shown. The adjustment capability list 400 shown in FIG. 4 is created by calculating the C to F substations in the same manner.
Pr2 = Pmax2-P2
= 10-0 = 10MW
Qlr2 = Qlmax2-Ql2
= 20-0 = 20MVA
Qcr2 = Qcmax2-Qc2
= -20-0 = -20MVA

When the adjustment table 500 is created, the adjustment degree dVli calculated based on the phase difference adjustment degree dθ and the ShR adjustment capability Qlri as follows by the operations of the equations (4), (6), and (7). Then, an adjustment degree dVci calculated based on the SC adjustment capability Qcri is calculated. Here, as an example, calculation examples of the adjustment degrees dθ, dVl3, and dVc3 at the C substation are shown. The adjustment table 500 shown in FIG. 4 is created by calculating in the same manner for the B, D to F substations.
dθ = Pr3 * Σ (X3) / k
= 10 * (1 + 1 + 1 + 1) /17.45
= 2.29 °
dVl3 = (Ps3 / (Ps3 + Qlr3) −1) * V3 / Vb * 100
= (900 / (900 + 20) -1) * 104.5 / 110 * 100
= -2.06%
dVc3 = (Ps3 / (Ps3 + Qcr3) −1) * V3 / Vb * 100
= (900 / (900-20) -1) * 104.5 / 110 * 100
= 2.15%

  If the degree of adjustment shows a negative (negative) value, it will cause the voltage value to deteriorate. Therefore, the negative (negative) value will not be included in the adjustment level based on the voltage difference, and a positive (positive) value will be used as the voltage difference. This is adopted as the adjustment degree dVi based. In this embodiment, the direction in which the adjustment degree dθ based on the phase difference and the adjustment degree dV (dVli, dVci) based on the voltage difference are reduced is positive.

  Specifically, in the B substation, the adjustment degree dVl3 indicates a negative (negative) value and the adjustment degree dVc3 indicates a positive (positive) value. Therefore, the adjustment degree dVc3 is set to an adjustment degree dV based on a voltage difference. . In the radial system as in this embodiment, the voltage change of each bus is assumed to change the voltage by a uniform value at the lower bus.

When creating the operation slip 600, the adjustment degree dθ based on the phase difference and the adjustment degree dV based on the voltage difference are adjusted to 0 or minimum based on the phase difference Δθ, the voltage difference ΔV, and each value in the adjustment table 500. Select equipment. For example, in the case of a combination pattern including all the generators installed in the B to F substations, after adjusting the phase difference at the time when the loop-off occurs when all these generators are adjusted and the loop is restored, The phase difference is calculated by the following formula.
17.2- (2.29 + 1.72 + 1.15 + 0.57)
= 11.47 ≒ 11.5 °

Also, for example, in the case of a combination pattern including SCs installed in B and C substations (ShR is not adopted because adjustment levels dVl2 and dVl3 indicate negative (negative) values), these SCs are adjusted. The voltage difference after adjustment with respect to the voltage difference at the time when the loop-off occurs when the loop is restored is calculated by the following equation.
5- (2.15 + 2.05) = 0.8%

Similarly, in the case of a combination pattern including SCs installed in substations B to D (ShR is not adopted because adjustment levels dVl2, dVl3, and dVl4 indicate negative values), these SCs are adjusted. When the loop is restored, the adjusted voltage difference with respect to the voltage difference at the time when the loop-off occurs is calculated by the following equation.
5- (2.15 + 2.05 + 1.98) = 1.18%

  Here, comparing the difference between the adjusted voltage difference of 0.8% and 1.18%, 0% <0.8% <1.18%, and the adjusted voltage difference is 0.8%. The SCs installed at the B and C substations are selected as the SCs to be adjusted for the voltage difference. Further, when creating the operation slip 600, priorities are given in the order of the adjustment equipment having the highest effect. In this embodiment, the higher the positive value, the higher the effect. Although the comparison relating to the selection of the phase difference adjustment target is omitted, in the example illustrated in FIG. 8, the generator installed in the BF substation is identified as the generator to be the phase difference adjustment target. The In FIG. 6 described above, the adjustment facilities selected based on such calculation results are shown in the order according to the priority order.

In calculating the phase difference Δθ ′ and the voltage difference ΔV ′, the equations (8) and (9) used for calculating the phase difference Δθ and the voltage difference ΔV are used. Specifically, for example, the phase difference Δθ ′ is calculated by the following equation. In calculating the phase difference Δθ ′, the phase difference Δθ in the equation (8) is set as the phase difference Δθ ′.
Δθ = Σ (Pli * Xi) /17.45 (8)
Δθ ′ = 1 * (30−10−50−70−100) /17.45
= -11.5 °

Specifically, for example, the voltage difference ΔV ′ on the BC line between the B substation and the C substation where the loop-off has occurred is calculated by the following equation. In calculating the voltage difference ΔV ′, the voltage difference ΔV in the equation (9) is set as the voltage difference ΔV ′. According to FIG. 8, the bus 120 voltage V2 of the B substation is 110 kV. Further, according to FIG. 8, the bus 130 voltage V3 of the C substation is V3 = 104.5 + (2.15 + 2.05) /100*110=109.1 kV.
ΔV = (Vi−V (i + 1)) / Vb * 100 (9)
ΔV ′ = (110−109.1) / 110 * 100
= 0.8%

  The application range of the control center system 210 and the loop support system 200 described above is preferably, for example, a local loop system of 110 kV or less that can ensure a time delay when a loop-off accident occurs. In addition, the control center system 210 and the loop support system 200 can be applied to regular system changes.

  As described above, the control center system 210 that realizes the loop support apparatus of this embodiment acquires information on each track and each adjustment facility from the database when a loop-off occurs in the loop system, and is acquired. Based on the information, the phase difference Δθ and the voltage difference ΔV are calculated according to the direct current method. Further, the adjustment capability of each adjustment facility is calculated based on the information acquired from the database, and the adjustment degree dθ, dV (dVli) of each adjustment facility relative to the adjustment capability of each adjustment facility is calculated based on the calculation result of the calculation. , DVci). Then, based on the phase difference Δθ, the voltage difference ΔV, and the adjustment degrees dθ, dV (dVli, dVci), the loop system is restored to the loop state from among a plurality of adjustment facilities constituting the loop system in which the loop-off has occurred. Select the adjustment equipment to be operated for. After that, when operating the selected adjustment equipment to restore the loop system, the phase difference Δθ ′ and the voltage difference ΔV ′ at both ends of each line are calculated according to the AC method, and the calculation result according to the AC method is obtained. Based on this, it is characterized in that information on the previously selected adjustment facility is output.

  That is, the control center system 210 according to the embodiment of the present invention performs a series of calculations based on the phase difference Δθ and the voltage difference ΔV calculated according to the direct current method, selects an adjustment facility, and then follows the alternating current method. When it is determined that the adjustment equipment selected based on the calculation result according to the direct current method is appropriate based on the calculated phase difference Δθ ′ and voltage difference ΔV ′, the operation slip 600 is a series of calculation results. Is output.

  As described above, according to the control center system 210 according to the embodiment of the present invention, when the adjustment amount is calculated using a plurality of types of calculation methods, the number of calculations increases. In the final system, the calculation can be performed according to the strict calculation AC method, and it can be checked whether the adjustment equipment selected according to the DC method is as expected (appropriate adjustment equipment). In addition, by performing recalculation and readjustment at the time of the loop, it is possible to respond in real time to changes in power flow during the loop.

  The DC method is a calculation method that linearly approximates the equation for the calculation of the line power flow, but it is inaccurate compared to the AC method (Newton-Raphson method) that iteratively calculates a nonlinear equation to satisfy an appropriate convergence condition. It is known that the convergence is high.

  According to the control center system 210 of the embodiment of the present invention, first, the calculation result according to the DC method is performed, and then the calculation according to the AC method is performed based on the calculation result according to the DC method. By performing, the reliability of the adjustment equipment selected based on the calculation result according to the direct current method can be confirmed by the calculation according to the alternating current method. That is, by performing the calculation according to the direct current method, which requires a short time to obtain the calculation result, and then performing the calculation according to the alternating current method, a highly reliable calculation result can be obtained early.

  As described above, in the loop system, even if the generator output is the same, the adjustment force differs depending on the accident point, and even if the phase adjuster is the same, the short-circuit capacity differs depending on the accident point and the adjustment force differs. An accident that causes a loop-off occurs due to a natural phenomenon, and in an actual loop system (power system 100), the installed adjustment equipment, the operation state of the adjustment equipment, and whether or not the adjustment equipment is installed It is different for each electric station. For this reason, it is difficult to predict the accident time and the accident point in advance, and it is difficult to estimate the phase difference and the voltage difference at the loop recovery point or the loop recovery point in advance.

  According to the control center system 210 of the embodiment according to the present invention, it is possible to quickly select a highly reliable adjustment facility suitable for loop recovery without being influenced by the experience and intuition of the operator. That is, the operator's manual calculation and complicated judgments can be made unnecessary, so that reliable and safe operation is possible regardless of who implements it. Thereby, high certainty and high safety | security concerning operation of the electric power grid | system 100 are securable.

  Further, according to the control center system 210 of the embodiment according to the present invention, high reliability and high safety for the operation of the power system 100 are ensured, and further, skills and experience acquisition related to the loop operation of the operator are reduced. Therefore, it is possible to reduce the work burden on the operator for loop recovery.

  Further, the control center system 210 according to the embodiment of the present invention has the adjustment degrees dθ, dV (dVli, dVci) included in a plurality of combination patterns including one or more adjustment degrees dθ, dV (dVli, dVci). A combination pattern in which the adjustment value obtained by dividing the total value from the phase difference Δθ and the voltage difference ΔV is 0 or minimum is specified, and an adjustment facility according to the adjustment degree included in the specified combination pattern is selected. It is characterized by doing so.

  According to the control center system 210 of the embodiment according to the present invention, it is possible to use as an adjustment facility for loop restoration by selecting an adjustment facility based on the calculation result according to the direct current method that can obtain the calculation result at an early stage. It is possible to perform calculations on all the adjustment equipments having the characteristics and the combination patterns of all the adjustment equipments, and select the adjustment equipments based on the calculation results. Thereby, the optimal adjustment equipment can be selected from the combination pattern of all the adjustment equipment.

  Furthermore, according to the control center system 210 of the embodiment of the present invention, the reliability of the adjustment equipment selected based on the calculation result according to the DC method based on the calculation result according to the AC method performed thereafter. Can be judged. As a result, a highly reliable adjustment facility suitable for loop restoration can be selected at an early stage without being affected by the experience and intuition of the operator.

  Further, the control center system 210 according to the embodiment of the present invention is characterized in that, in addition to the operation slip 600, an adjustment capability list 400 and an adjustment table 500 are output.

  According to the control center system 210 of the embodiment according to the present invention, in addition to the operation slip 600 indicating the selected adjustment facility, various kinds of items such as the adjustment capability list 400 and the adjustment table 500 related to the selection of the adjustment facility. Information can be output together. Thereby, the operator can check the values of the adjustment capability list 400 and the adjustment table 500 in addition to the operation slip 600, and can perform an input operation related to loop recovery. Thereby, high certainty and high safety | security concerning operation of the electric power grid | system 100 are securable.

  Further, the control center system 210 according to the embodiment of the present invention determines the reliability of the input operation based on the content of the input operation by the operator and the content of the operation slip 600 received by the user interface, When the contents of the input operation and the contents of the operation slip 600 match, a control signal for the corresponding adjustment facility (TC220) is output.

  According to the control station system 210 of the embodiment of the present invention, when the input operation by the operator matches the calculation result by the control station system 210, the control station system 210 outputs a control signal for the adjustment equipment selected by the control station system 210. be able to. Thereby, generation | occurrence | production of human errors, such as an operator's erroneous operation, can be suppressed, and the high certainty concerning operation | use of the electric power grid | system 100 and high safety | security can be ensured.

  As described above, the loop support device according to the present invention is useful for the loop support device that supports the operation of the operator for loop recovery in the loop system, and in particular, it is difficult to predict the accident timing and the accident point in advance. It is suitable for a loop support device that supports the operation of the operator for loop recovery in such a case.

100 Power System 110 A Substation Bus 120 B Substation Bus 130 C Substation Bus 140 D Substation Bus 150 E Substation Bus 160 F Substation Bus 200 Loop Support System 210 Control Station System 220 TC
DESCRIPTION OF SYMBOLS 301 Input part 302 Database part 303 Operation part 304 Interface part 400 Adjustment capability list 500 Adjustment table 600 Operation form

Claims (4)

An acquisition means for acquiring information on each line and each adjustment facility when any line in a loop system in which a plurality of lines are connected in a ring shape via a plurality of adjustment facilities provided between the lines is disconnected; ,
First calculation means for calculating a phase difference and a voltage difference at both ends of the cut line according to a direct current method based on the information acquired by the acquisition means;
Based on the information acquired by the acquisition means, a second calculation means for calculating the adjustment capability of each adjustment facility;
Based on the calculation result calculated by the second calculation means, third calculation means for calculating the adjustment degree of each adjustment facility with respect to the adjustment capability of each adjustment facility;
Based on the calculation results calculated by the first calculation unit and the third calculation unit, an adjustment facility to be operated to restore the loop system to a loop state is selected from the plurality of adjustment facilities. A selection means;
A fourth calculating means for calculating a phase difference and a voltage difference at both ends of each line according to an alternating current method when operating the adjustment equipment selected by the selecting means to restore the loop system;
Based on the calculation result calculated by the fourth calculation means, an output means for outputting information on the adjustment equipment selected by the selection means;
A loop support device comprising: The selection means includes
Dividing a total value of the adjustment degrees included in the plurality of combination patterns including one or more adjustment degrees calculated by the third calculation means from the phase difference and the potential difference calculated by the first calculation means. Identify the combination pattern that the adjustment value obtained by
The loop support apparatus according to claim 1, wherein an adjustment facility according to an adjustment degree included in the identified combination pattern is selected. The output means includes
The loop support apparatus according to claim 1, further comprising: information related to a calculation result calculated by the second calculation unit and the third calculation unit. An input means for accepting an input operation;
A determination unit that determines the reliability of the input operation based on the content of the input operation accepted by the input unit and the calculation result calculated by the fourth calculation unit;
Control signal output means for outputting a control signal for the corresponding adjustment equipment among the plurality of adjustment equipment based on the determination result by the determination means;
The loop support apparatus according to any one of claims 1 to 3, further comprising:

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