JP2022013080A - Voltage reactive power control measure creation device, voltage reactive power control device, and method - Google Patents

Abstract

To enable an operator to select a voltage reactive power control method matching an operation case to improve convenience to the operator.SOLUTION: There is provided a voltage reactive power control measure creation device 100 which estimates a state of voltage reactive power at a node of an electric power system from the present to a future point of time, and finds measures to control voltage reactive power control equipment to avoid a deviation in the estimated state from a reference value if the deviation is predicted. The voltage reactive power control measure creation device comprises an input part which inputs information on the electric system, an HMI device which displays, on a screen, an input variable of the voltage reactive power control equipment from an operator, and a computation device. The computation device comprises state estimation means which uses the input from the input part to estimate a state of voltage reactive power at the node of the electric power system from the present to a future point of time, and control measure calculation means which uses an input variable of the voltage reactive power control equipment that the operator sets to calculate a tidal current of the electric power system, and finds a control measure for each input variable of the voltage reactive power control equipment, a plurality of found control measures being displayed on the screen of the HMI device.SELECTED DRAWING: Figure 1

Description

The present invention relates to a voltage-reactive power control measure creating device, a voltage-reactive power control device, and a method in a power system monitoring and control system.

In operating the power system, the operator is required to keep track of the latest power system status and take prompt and accurate judgments and measures when the system status changes in order to provide a stable supply of electricity. ..

In recent years, the sophistication and complexity of electric power system operation has been increasing due to the increase in the scale of the electric power system due to the increase in electric power demand and the problems in supply and demand and system operation due to the expansion of the interconnection amount of renewable energy power sources. Power system monitoring and control systems are also developing into higher functionality and automation.

Among them, voltage-reactive power control, which is a part of the function of the power system monitoring and control system, reduces the stable operation of the voltage of the power system (prevention of voltage collapse / deviation and economic operation), power loss, and reduction of the number of equipment operations. The purpose is to make it possible.

Regarding voltage ineffective power control, according to Patent Document 1, a power supply whose output fluctuates depending on the weather (when a large number of output fluctuating power supplies are introduced, the amount of fluctuation in voltage and power flow increases due to the output fluctuation of renewable energy, and the power supply Even if one or more of the configuration or grid configuration changes occur, the balance between the voltage of the power system and the ineffective power is maintained, the set range is maintained, the economic efficiency is improved, and the reference value or target value of the voltage control device or For the purpose of providing technology that achieves one or more of reducing the operator's effort to set the set value, "Evaluation target data for the individual control device that adjusts the voltage ineffective power of the power system. The target value data, the individual control device control method data, and the individual control device data are stored in the first database, and the individual control device is stored in the second database that stores the device operation data and the first database. It is characterized by including an individual control device operation prediction unit that predicts the operation of the individual control device from the data and obtains the individual control device operation prediction data, and a display unit that displays the individual control device operation prediction data and the device operation data in a comparable manner. It is known to be a voltage ineffective power operation support device.

Further, according to Patent Document 2, the manual control of the operator is evaluated and analyzed in the short and long term to standardize the manual control, and the idea of the operator is incorporated to improve the function and improve the function. For the purpose of being able to find out the nature, "We monitor the state amount of the power system and control the supply and demand so that the state amount is within the allowable range of the standard value in consideration of the economic load distribution and the system. A monitoring control means 15 for system operation evaluation of equipment operation results, an operation record storage unit 14 for storing input / output data for monitoring control by the monitoring control means 15 as an operation record, and an operation / manual operation by an operator. The operation of the day is performed using the operation recording means 13 that stores the control result as an operation record in the operation record storage unit 14 and the evaluation criteria set in advance for the operation record stored in the operation record storage unit 14. It is provided with an evaluation means 16 for evaluation. "

Japanese Unexamined Patent Publication No. 2018-068045 Japanese Unexamined Patent Publication No. 2012-016111

In the voltage invalid power control in the power system monitoring and control system, the state of the equipment of the future system and the voltage value of the bus voltage from the data linkage (demand forecast data, work stop plan of the power system equipment, weather data) from various equipment groups, etc. One or more of the combination of changing the command value of the generator, changing the transformer tap value, turning on / off the phase adjustment equipment, etc. so that the bus voltage of the monitored system falls within the reference voltage. Seek control measures and implement control.

Further, as the control method, there are a method of automatically controlling the calculated control measure and a method of manual control by the operator checking and reviewing the calculated control measure based on the calculated control measure.

On the other hand, in power system operation, it is necessary to consider the system state that changes from time to time and the characteristics of the equipment of the power system equipment installed at the site, and there may be cases where the know-how of the operator intervenes. In other words, even if the purpose is to eliminate the deviation of the bus voltage, the procedure may differ depending on the know-how of the operator, and one solution control measure calculated from a certain logic is a complicated power system operation method. It is possible that the reliability of the function is not satisfied.

An object of the present invention is that the know-how of the operator may intervene in the operation of the electric power system, and there is a characteristic that the operation method is not necessarily one. Therefore, by presenting a plurality of control measures to the operator. It is possible to select a voltage-reactive power control method that suits the occasional operation case, and to improve the convenience of the operator's voltage operation work.

From the above, in the present invention, "the state of the voltage ineffective power at the node of the power system from the present time to the future time point is estimated, and when it is predicted that the estimated state deviates from the reference value, the deviation avoidance is avoided. It is a voltage ineffective power control measure creation device that seeks control measures for voltage ineffective power control equipment, and takes in the input unit for inputting power system information and the input variables of the voltage ineffective power control equipment from the operator, and screens It is equipped with an HMI device for displaying and a calculation unit that performs an operation for obtaining a control measure using an input unit and an input from the HMI device. The calculation unit is a node of a power system using an input from the input unit. Using the state estimation means for estimating the state of voltage ineffective power from the present time to the future time point and the input variable of the voltage ineffective power control device set by the operator by the HMI device, the power system power flow is calculated and the voltage is invalid. It is a voltage-disabled power control measure creation device characterized by having a control measure calculation means for obtaining control measures for each input variable of the power control device and displaying a plurality of obtained control measures on the screen of the HMI device. " ..

Further, in the present invention, "a voltage for avoiding deviation when the state of voltage ineffective power at a node of the power system is estimated from the present time to a future time point and the estimated state is predicted to deviate from the reference value. It is a voltage ineffective power control device that seeks control measures for the ineffective power control device and operates the voltage ineffective power control device. An input unit for inputting power system information and an input variable of the voltage ineffective power control device from the operator. It is equipped with an HMI device for capturing and displaying on the screen, and a calculation unit for performing an operation for obtaining a control measure using the input unit and the input from the HMI device. The calculation unit uses the input from the input unit to generate power. The power system power flow is calculated using the state estimation means for estimating the state of the voltage ineffective power from the present time to the future time in the node of the system and the input variable of the voltage ineffective power control device set by the operator by the HMI device. Then, the control measure calculation means for obtaining the control measure for each input variable of the voltage ineffective power control device and the obtained multiple control measures are displayed on the screen of the HMI device, and the control measure selected by the operator on the screen is displayed on the screen of the power system. The voltage ineffective power control device is characterized by having an output unit for giving to the voltage ineffective power control device.

Further, in the present invention, "a voltage for avoiding deviation when the state of voltage ineffective power at a node of the power system is estimated from the present time to a future time point and the estimated state is predicted to deviate from the reference value. This is a method for creating a voltage disabled power control measure that requires control measures for the disabled power control device. To capture the input unit for inputting power system information and the input variables of the voltage disabled power control device from the operator and display them on the screen. The HMI device and the calculation unit that performs the calculation to obtain the control measure using the input unit and the input from the HMI device are provided. Estimate the state of voltage ineffective power up to the time point, perform power system power flow calculation using the input variables of the voltage ineffective power control device set by the operator by the HMI device, and perform each input variable of the voltage ineffective power control device. It is a method of creating a voltage ineffective power control measure, which is characterized in that a control measure is requested in the HMI device and a plurality of the obtained control measures are displayed on the screen of the HMI device. "

Further, in the present invention, "a voltage for avoiding deviation when the state of voltage ineffective power at a node of the power system is estimated from the present time to a future time point and the estimated state is predicted to deviate from the reference value. It is a voltage ineffective power control method that seeks control measures for the ineffective power control device and operates the voltage ineffective power control device. An input unit for inputting power system information and an input variable of the voltage ineffective power control device from the operator. It is equipped with an HMI device for capturing and displaying on the screen, and a calculation unit for performing an operation for obtaining a control measure using the input unit and the input from the HMI device. The calculation unit uses the input from the input unit to generate power. Estimate the state of voltage ineffective power at the node of the system from the present time to the future time point, perform the power system power flow calculation using the input variable of the voltage ineffective power control device set by the operator by the HMI device, and make the voltage invalid. Request control measures for each input variable of the power control device, display the obtained multiple control measures on the screen of the HMI device, and give the voltage-disabled power control device of the power system according to the control measures selected on the screen by the operator. It is a characteristic voltage ineffective power control device.

According to the present invention, by presenting and having the operator select a plurality of prioritized control measures, it is possible to improve the convenience of the operator in the voltage operation work of the operator. Further, it is possible to provide a power system monitoring and control system capable of analyzing an operation pattern by accumulating selected control measure data and deriving a control measure more in line with the know-how of the operator.

The figure which shows the structural example of the voltage ineffective power control apparatus in the power system monitoring control system which concerns on embodiment of this invention. The figure which shows the future system state (voltage fluctuation prediction example) created by the state estimation means 5. The figure which shows the whole processing flow when the arithmetic unit 8 of FIG. 1 is realized by a computer. The figure which shows the processing content of the control measure calculation means 6 (processing step S37). The figure which shows the example which displayed a plurality of control measures on the HMI screen 90. The figure which showed the concept about the change width of a database registration value and the change width at the time of an online operation.

Hereinafter, examples of the present invention will be described with reference to the drawings.

FIG. 1 is a diagram showing a configuration example of a voltage-reactive power control measure creating device in the power system monitoring and control system according to the embodiment of the present invention. The power system monitoring and control system of FIG. 1 is composed of a voltage-reactive power control device and a power system 1. Further, the voltage ineffective power control device includes a voltage ineffective power control measure creating device 100.

Of these, the voltage ineffective power control measure creating device 100 of FIG. 1 is composed mainly of an arithmetic device 8 and includes an information transmission device 2, an HMI device 10, an external data reception device 3, and an operation record storage device 9. Information of the power system 1 and the like are obtained via the information transmission device 2 and the external data reception device 3, and a voltage ineffective power control measure is created. Further, the voltage ineffective power control measure creating device 100 gives an optimum control measure according to the situation from a plurality of created voltage ineffective power control measures as a voltage ineffective power control command to the constituent equipment of the power system 1. It can function as an ineffective power control device.

On the other hand, the power system 1 is composed of many facilities and devices, and among them, the devices that contribute to the control of the voltage and the reactive power, which are the objects of the present invention, are the generator G, the tapped transformer LRT, and the like. Phase adjustment equipment SR. Since the power system 1 is composed of a large number of devices for controlling these voltages and reactive powers, it is better to operate which device and to what extent and in what order even if the voltage and reactive power are improved. There can be multiple combinations, and it is required to be the optimum combination.

By receiving the state change data of the power system 1 from the information transmission device 2, the arithmetic unit 8 displays the current and future system states, voltage, control measures for improving the reactive power, and the like on the HMI device 10. Specifically, the state estimation means 5 in the arithmetic unit 8 estimates and creates a future system state based on the current system data and the information of the external data receiving device 3, and further refers to the operation variable setting means 7 to determine the voltage. Create control measures to improve reactive power. The information of the external data receiving device 3 is information on the configuration of the power system, various devices, various settings, or operational restrictions.

The future system state (voltage fluctuation prediction example) created by the state estimation means 5 is as illustrated in FIG. In FIG. 2, the horizontal axis shows the time, and the vertical axis shows the upper and lower monitoring lower limit values of the voltage set above and below the operation reference value of the voltage. According to the display example of FIG. 2, the voltage shown by the solid line within the range of the monitoring upper limit value at the current time t0 approaches the monitoring upper limit value at the future time t1 and then exceeds the monitoring upper limit value until the time t2. It has been shown to show a tendency to increase in the state. On the other hand, for example, if an appropriate control measure for reducing the voltage is executed before the time t1, the voltage can be recovered as shown by the dotted line.

In the control measure calculation means 6 in the voltage ineffective power control measure creating device 100 of FIG. 1, when the prediction result of the voltage ineffective power detects a deviation from the monitoring upper limit value as in the example of FIG. 2, it is set as a reference value. Calculate control measures to fit. As the input information of the controlled measure calculation means 6, the information of the state estimation means 5 and various actual data stored in the operation variable setting means 7 and the operation record storage device 9 are used. The information on the manipulated variables held in the manipulated variable setting means 7 is input by the operator from the HMI device 10.

The control measure for voltage ineffective power control calculated by the control measure calculation means 6 is displayed on the HMI screen of the HMI device 10, stored in the operation record storage device 9, and further, when functioning as a voltage ineffective power control device, an operation command is given. It is given to a device (generator G, a transformer with a tap LRT, a phase adjustment facility SR) for controlling voltage reactive power of the power system 1 via an output means 4. It is assumed that the input data, the data as an intermediate product in various operations, and the data as the final result are appropriately stored in the operation record storage device 9.

FIG. 3 shows an overall processing flow when the arithmetic unit 8 of FIG. 1 is realized by a computer. FIG. 3 shows as a flow the process from receiving the input information from various external devices to the calculation of the control measure by the arithmetic unit 8 and the execution of the operation.

In the first processing step S31 of FIG. 3, for example, current, voltage, power, etc. are transmitted via the information transmission device 2 as information on the current cross section of the node which is the monitoring target point of the voltage set in the power system and the reactive power. Obtain. At this time, information on the power system configuration, various devices, various settings, or operational restrictions necessary for estimating the system state is also obtained via the external data receiving device 3.

In the process step S32, the state estimation process is appropriately performed. This is because some nodes do not have a detector for the necessary information, or there is a detector but it is not possible to obtain information with sufficient time accuracy. It performs estimation processing by interpolation processing, power flow calculation, etc.

The processing step S33 repeatedly executes the processing step between the processing step S38 and the processing step S38 for each node. In this iterative process, the system state at each time point from the present time to the future time point is estimated and created in the process steps S34 and S35, the operation optimum voltage of the node is set in the process step S36, and the operation optimum voltage is set in the process step S37. Determine the voltage control measures that make this feasible. As a result of this iterative processing, a control measure capable of setting all the voltages at the plurality of nodes, which are the monitoring target points of the voltage and the reactive power, to the operation optimum voltage is determined.

When determining the voltage control measure that realizes the optimum operating voltage in the processing step S37, the data given by the instrumental variable setting means 7 and various actual data stored in the operation record storage device 9 are referred to.

In the processing step S39, the voltage control measure that enables the realization of the optimum operation voltage obtained in the processing step S37 is operated and executed, and in the processing step S40, the operation results at this time are stored and stored in the operation record storage device 9. The information stored and stored in the operation record storage device 9 will be reflected in the processing in the processing step S37 in the future.

The present invention is characterized by the processing from the processing step S37 to the processing step S39, and other parts can be realized by known existing techniques. Therefore, the processing content of the processing step S37 will be mainly described below. do.

As a premise for explaining in detail the processing contents of the control measure calculation means 6 (processing step S37) of FIG. 1, the data used here (data given by the operation variable setting means 7 and the operation record storage device 9) are stored. Various actual data and their input information), and the role played by the instrumental variable setting means 7 will be clarified.

First, the operation variable setting means 7 aims to calculate a controlled measure according to the know-how of the operator by weighting the input information with respect to various input information set by the operator from the HMI screen. The various input information referred to here means an input considering the operation combination of various devices installed in the power system and the characteristics of each system. Since the power system is constructed from multiple electric stations via transmission lines, various input information can be set for each electric station. Since a node is generally a bus in an electric station, this setting is made for each node.

Incidentally, the operation combination of the equipment is a combination of the control methods of the generator, the transformer, and the phase adjustment equipment, which are the equipment installed in the power system and contributes to the control of the voltage reactive power, and makes it possible to set the combination. .. For example, depending on the way of thinking of the operator, as a control method when performing voltage reactive power control, the control method is different, for example, it is desired to operate only the phase adjustment equipment to obtain a control measure. In addition, depending on the operator's thinking, it is necessary to consider the combination of the adjustment order of the voltage adjustment equipment, such as controlling the phase adjustment equipment and then the generator.

In addition, the characteristics of each system are the cumulative number of operations of the equipment to be operated and the operating status (considering aging), and by taking these points into consideration and weighting, the input takes into consideration the characteristics of each system. .. For example, in consideration of the operating status of a certain phase adjustment equipment, when it is not desired to use it as much as possible in the calculation of control measures, the operation priority is lowered for the control measures using the phase adjustment equipment.

Furthermore, the various actual data stored in the operation record storage device 9 are stored as the selection rate of the contents of the control measures selected for each operator, so that the operation know-how is accumulated and fed back when the next control measure is calculated. Especially used.

Further, for example, in the tap operation of the transformer, the voltage change width due to the change of the tap value is stored in the database in advance, but in the actual online control, the change width may be different depending on the outside air condition or the like. Therefore, a mechanism is provided in which the change width during actual online operation is saved in the database and fed back when the next control measure is calculated.

The processing contents of the control measure calculation means 6 (processing step S37) will be described in detail below with reference to FIG. In the processing flow of FIG. 4, first, in the processing step S37a, various input information is set from the HMI screen by the operation variable setting means 7.

Using Tables 1 and 2, an example of the input variable read into the operation variable setting means 7 by the operator via the HMI screen will be described. Table 1 shows an example in which the operator gives the combined operation priority of voltage adjusting equipment (generator, transformer, phase adjustment equipment) that can contribute to the control of voltage and reactive power as input variables. .. In Table 1, the command priority is described as the combination operation priority.

Here, the operator recommends combinations of 1, 2, 3, and 4 as examples of combinations of devices that are effective in resolving fluctuations in voltage and inactive power. By the way, when dealing with one device (for example, combination operation priority 4), the device name (phase adjustment equipment) is described only in the column of command priority 1, and the measures are dealt with by sequential control by multiple devices. In the case (for example, combination operation priority 2), the device name (transformer → phase adjustment equipment → power generation) is sequentially displayed in the command priority 1 column, the command priority 2 column, and the command priority 3 column according to the operation order of the devices. Machine) is described. Here, the case where four patterns are set is illustrated, but the lower the combination priority, the more the control method the operator wants to operate. In the illustrated example, the method 4 using only the phase adjustment equipment is the control method that the operator wants to operate.

In Table 2, for the phase adjustment equipment that is the voltage adjustment equipment that the operator wants to operate, the electrical station to which each equipment belongs, the equipment name, the number of operations, the operating status, and controllability (○: used for calculation of control measures ×: control) The data (not used for strategy calculation) is shown as an input variable.

Although not shown here, inputs for the same purpose are prepared for the control methods of other voltage adjusting devices (transformers, generators). Further, the information in Table 1 is set by the operator according to his / her own will, but the information in Table 2 may refer to the device information set in advance and stored in the database.

In short, in the processing step S37a, the input variables are read as the conditions for calculating the voltage control measure, but these are related to the operation contents and order of the equipment. For example, in a certain system, "I want to control the reactive power only by the transformer / phase adjustment operation", or "I want to operate in the order of transformer (tap operation)-> phase adjustment operation". At this time, the cumulative number of operations of the equipment to be operated and the operating status (aging) are taken into consideration, and various actual data (actual results of the operation contents / order and control range selected in the past) are referred to.

In the processing step S37b, the optimum power flow calculation is performed under the conditions at the time of the set input variable. This power flow calculation is sequentially executed for different input conditions according to the priorities and device names in Tables 1 and 2. In the optimum power flow calculation, the bus voltage is calculated so as to be close to the reference value (target voltage) under the condition of the "input variable", and the number of operation of the device is minimized.

In this way, from the various input information that has been set, a control measure that minimizes the number of operation of the device for each input variable is calculated. At that time, the control / non-control device set in Table 2 (in this example, the △△ phase adjustment equipment 1 of the △△ substation) is not used for the control measure calculation.

In the process step S37c, a control measure is devised, but a plurality of procedures are calculated from "input variables" instead of a unique solution. It also weights "input variables", scores control measures, and presents recommended procedures to operators. By displaying a plurality of control measures on the HMI screen together with reference information, sufficient judgment material necessary for the operator to make a judgment is presented, and the operator's judgment is sought.

The plurality of control measures calculated based on various input information are displayed on the HMI screen 90 of FIG. On the screen 90, the command priority order 93, the selection rate 94, and the effect index 95 are set for each operation outline 92, and the detailed operation order procedure is displayed. Let them choose whether to adopt control measures. At the bottom of the screen 90, the electric station name 96, the operation device 97, and the operation content are specifically displayed as the details of the operation selected by the selection button 91.

Here, the command priority order 93, the selectivity 94, and the effect index 95 exemplified in FIG. 5 are information having the following meanings, respectively. Of these, the command priority order 93 is the content of the command priority order 1 to 3 as set in Table 1.

The selection rate 94 in FIG. 5 is a content showing the operation ratio up to the previous operation result by registering the combination of the command priority order 93 after actually performing the operation in the database as past experience information. For example, it is assumed that the control measures as shown in Table 3 have been controlled in the past.

Table 3 describes the device names for each command priority as the avoidance operations performed at that time for the cases 1 to 5 in the past. The breakdown of the past experience of 5 cases in this case is 1 case with only one phase adjustment equipment, 3 cases with sequential operation of transformer and phase adjustment equipment, transformer, phase adjustment equipment and generator. One example was a sequential operation. This past experience information is stored in a database and displayed as to what kind of control measures were executed and avoided in the past voltage and reactive power deviation situations. For example, Case 5 is a case where it can be avoided only by operating the phase adjusting equipment, and Case 2 is a case where it can be avoided by operating the transformer, the phase adjusting equipment, and the generator in this order.

The selection rate when there is a past case in Table 3 is shown in Table 4, and the ratio (selection rate) in which the operation order of the equipment according to the past case is selected is shown here. In this example, 60% selected the operation in the order of transformer, phase adjustment equipment, and 20% selected the operation in the order of transformer, phase adjustment equipment, and generator, and only the phase adjustment equipment. The selected percentage is 20%.

The effect index 95 in FIG. 5 is an index obtained from the deviation between the bus voltage and the reference bus voltage after the control measures are implemented. It is evaluated that the smaller the voltage deviation is, the higher the improvement effect after control is, and the index is as the effect index 95. It is a modified version.

The instrumental variable setting means 7 prepares a plurality of past operation cases that are considered to be effective in solving the predicted future state, and at least the command priority order 93, which is a control measure, and the ratio adopted in the past operation. It is grasped as a certain selectivity 94 and an effect index 95 which is an improvement effect at that time. Then, by presenting this content to the operator as shown in the example of FIG. 5, an attempt is made to select one by operating the selection button 91.

When displaying and selecting a plurality of such control measures, it is preferable to use a display order or highlighting that reflects the intention of the operator, and it is desirable that the screen can be edited according to an appropriate preference. For example, as the display order of the control measures, a mechanism that allows the sort order to be selected in advance according to the purpose of the operator from the items of the command priority order 93, the selection rate 94, and the effect index 95, and the control measures weighted by the computer. It is better to be able to select either of the mechanisms that sort in the order of and present to the operator.

In the latter mechanism, in which the computer sorts in the order of weighted control measures and presents them to the operator, there are two methods in stages. The first method is shown in Tables 5 and 6.

Regarding the first method, Table 5 shows No. 1 in the control measure calculation method. 1 to No. An example is shown when the five control measures of 5 are calculated together with the selection rate and the effect index information. Here, tentatively, in the example of Table 5, the weights of the command priorities of the set voltage adjusting devices are set for each priority, with rank 1 being 2.0, rank 2 being 1.8, rank 3 being 1.6, and rank 4 being. When defined as 1.4 and the weight of the effect index 95 is "3", when the display order of the control measures is scored based on the weight, the display order of the control measures in Table 5 is finally shown in Table 6. .. Here, for example, scoring is obtained by the operation priority of the voltage adjusting device × weight + effect index × weight. The weight can be freely tuned by the operator.

Tables 7 and 8 show the second method of the mechanism in which the computer sorts in the order of weighted control measures and presents them to the operator. The second method is a method in which the selectivity and the effect index are weighted.

Regarding the second method, Table 7 shows No. 1 in the control measure calculation method. 1 to No. An example is shown when the five control measures of 5 are calculated together with the selection rate and the effect index information. Here, in the example of Table 7, if the weight of the effect index is "5" and the weight of the selectivity is "3", and the display order of the control measures is scored based on the weight, the final table is used. The display order of the control measures 7 is shown in Table 8. Here, for example, scoring is obtained by selectivity × weight + effect index × weight. The weight can be freely tuned by the operator.

The reason why the above process is divided into two methods in stages is that the operation priority and the selection rate have the meaning of approximation, but the operation results are accumulated and the selection rate is in line with the know-how of the operator. This is because the case was taken into consideration. In addition, the operator can review the input data and standardize the operation pattern for a large number of operators by confirming the gap between the operation priority and the selection rate actually operated.

According to the above display result, the operator can confirm each control measure, and if there is a control measure that clearly does not conform to the operation among the requested control measures, the input item of the control measure is confirmed. By reviewing it, it is possible to improve the calculation accuracy when calculating the control measures from the next time onward.

After calculating the control measures as described above, the operator confirms the procedure of the created control measures and operates.
After that, the operation priority and the change width during the actual online operation, which are the information used for the operated control measures, are registered in the database of the operation record storage device.

FIG. 6 is a diagram showing the concept of the change width of the database registration value and the change width during online operation. In this figure, L1 is the tap voltage recorded in the database, L2 is the tap voltage during online operation, L3 is the tap voltage during online operation, and L4 is the average value of the tap voltage during online operation.

Of the data registered in the database of the operation record storage device, the operation priority is the selection rate and the data is processed. For the change width during actual online operation, the average value of the change width is obtained from the accumulated data, and the effect index using the accumulated data is displayed as a reference value when calculating the next control measure. Eventually, the accuracy of control measure calculation will be improved by reviewing the database of change width from the accumulated data.

After storing the accumulated data such as the operation results for a certain period of time, it can be said that the control measure procedure with a certain or higher display order score for the control measure calculation is highly reliable including the results. Therefore, for the control measures for which the score above a certain level is established, the control measure with the highest rank obtained at the time of calculating the control measures can be automatically controlled.

Another object of the present invention is to provide an automatic control method in which a computer learns the characteristics of power system operation by storing a control measure selected and executed in the past as a selection rate in a DB (DataBase).

In the present invention described above, a plurality of operation procedures are planned based on the input variables. This makes it possible to select a procedure that the operator is satisfied with by visualizing the control measure calculation conditions (setting at the discretion of the operator). In addition, the effect of each calculated control measure can be displayed and used as a judgment material for the operator's procedure selection. Also, by planning multiple operation procedures, it is possible to select which operation matches according to the characteristics of the system. In addition, past operation results can be accumulated and recommendations can be presented to the operator.

On the other hand, when the selection from a plurality of proposals is not performed, one control measure is calculated from a certain logic. In this case, the complicated operation procedure of the power system is not one solution, but the situation of the system and the characteristics of the equipment must be taken into consideration. Therefore, it is not always known whether the calculated control measures are correct. Also, I do not know under what conditions the computer calculated the control measures. In other words, the logic is complicated and the process leading to the calculation of control measures is unknown, so the basis of operation may be unclear.

1: Power system equipment 2: Information transmission device 3: External data reception device 4: Operation command output means 5: State estimation means 6: Control measure calculation means 7: Operation variable setting means 8: Calculation device 9: Operation record storage device 10 : HMI device

Claims (7)

Estimate the state of voltage reactive power from the present time to the future point in the node of the power system, and when it is predicted that the estimated state deviates from the reference value, the control measure of the voltage reactive power control device to avoid the deviation. It is a device for creating voltage-reactive power control measures that requires
The input unit for inputting power system information, an HMI device for taking in input variables of the voltage invalid power control device from the operator and displaying the screen, and the input unit and the input from the HMI device are used. Equipped with a calculation unit that performs calculations to obtain control measures
The calculation unit uses the input from the input unit to estimate the state of the voltage invalid power at the node of the power system from the present time to the future time point, and the voltage invalidity set by the operator by the HMI device. The HMI device is equipped with a control measure calculation means that calculates the power system flow using the input variables of the power control device and obtains control measures for each input variable of the voltage-disabled power control device. A voltage-disabled power control measure creation device characterized by displaying on the screen. The device for creating a voltage-reactive power control measure according to claim 1.
The input variable is a voltage-reactive power control measure creating device, characterized in that the type and operation order of the plurality of types of the voltage-reactive power control device are specified. The voltage-reactive power control measure creating device according to claim 1 or 2.
A voltage-reactive power control measure creating device characterized in that a voltage-reactive power control device of a power system is operated according to a control measure selected by an operator among a plurality of control measures displayed on the screen of the HMI device. The voltage-reactive power control measure creating device according to any one of claims 1 to 3.
The plurality of control measures displayed on the screen of the HMI device is a voltage-reactive power control measure creating device, characterized in that the effect of executing this control measure is expressed in an exponential notation. Estimate the state of voltage reactive power from the present time to the future point in the node of the power system, and when it is predicted that the estimated state deviates from the reference value, the control measure of the voltage reactive power control device to avoid the deviation. Is a voltage ineffective power control device that operates the voltage ineffective power control device.
The input unit for inputting power system information, an HMI device for taking in input variables of the voltage invalid power control device from the operator and displaying the screen, and the input unit and the input from the HMI device are used. Equipped with a calculation unit that performs calculations to obtain control measures
The calculation unit uses the input from the input unit to estimate the state of the voltage invalid power at the node of the power system from the present time to the future time point, and the voltage invalidity set by the operator by the HMI device. A control measure calculation means that calculates the power system flow using the input variables of the power control device and obtains control measures for each input variable of the voltage ineffective power control device, and a plurality of obtained control measures are applied to the HMI device. A voltage ineffective power control device that displays on a screen and includes an output unit that gives to the voltage ineffective power control device of the power system according to a control measure selected on the screen by the operator. Estimate the state of voltage reactive power from the present time to the future point in the node of the power system, and when it is predicted that the estimated state deviates from the reference value, the control measure of the voltage reactive power control device to avoid the deviation. It is a method of creating a voltage-reactive power control measure that requires
The input unit for inputting power system information, an HMI device for taking in input variables of the voltage invalid power control device from the operator and displaying the screen, and the input unit and the input from the HMI device are used. Equipped with a calculation unit that performs calculations to obtain control measures
The arithmetic unit estimates the state of the voltage reactive power at the node of the power system from the present time to the future time using the input from the input unit, and the voltage reactive power control device set by the operator by the HMI device. A voltage characterized by performing power system power flow calculation using input variables, obtaining control measures for each input variable of the voltage-reactive power control device, and displaying a plurality of the obtained control measures on the screen of the HMI device. How to create a reactive power control measure. Estimate the state of voltage reactive power from the present time to the future point in the node of the power system, and when it is predicted that the estimated state deviates from the reference value, the control measure of the voltage reactive power control device to avoid the deviation. Is a voltage ineffective power control method for operating the voltage ineffective power control device.
The input unit for inputting power system information, an HMI device for taking in input variables of the voltage invalid power control device from the operator and displaying the screen, and the input unit and the input from the HMI device are used. Equipped with a calculation unit that performs calculations to obtain control measures
The arithmetic unit estimates the state of the voltage ineffective power at the node of the power system from the present time to the future time using the input from the input unit, and the voltage ineffective power control device set by the operator by the HMI device. The power system power flow is calculated using the input variables, control measures are obtained for each input variable of the voltage ineffective power control device, and the obtained multiple control measures are displayed on the screen of the HMI device, and the operator displays the control measures on the screen. A voltage ineffective power control method, characterized in that the voltage is applied to the voltage ineffective power control device of the power system according to the control measures selected in.

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