JP2012016111A - Power system monitoring control system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To assess and make a short and long term analysis of operators' manual control for the standardization of manual control, and to achieve greater functionality and find an improvement direction by adopting the operators' ideas.SOLUTION: There is provided a power system monitoring control system which comprises: monitoring control means 15 that monitors the state quantity of a power system and controls supply and demand so that the state quantity falls within an allowable range of a reference value in consideration of economic load distribution, and makes a system operation assessment of system equipment operation performance; an operation record storage unit 14 that stores input-output data for monitoring control by the monitoring control means 15 as an operation record; operation record means 13 that stores the results of operators' operation/manual control in the operation record storage unit 14 as an operation record; assessment means 16 that assesses an operation on the day concerned by using an assessment standard established in advance for the operation record stored in the operation record storage unit 14.

Description

  The present invention relates to a power system monitoring control system that monitors a state quantity of a power system and performs power supply and demand control.

  In recent years, power systems have become larger and power system operation has become more sophisticated and complicated due to an increase in power demand, and power system monitoring and control systems have been developed to have higher functionality and automation.

  The power system monitoring and control system has various operational purposes as follows.

(1) Adjust power generation according to the changing power demand and maintain a balance between supply and demand (frequency stability)
(2) Stable system voltage maintenance (3) Economical power generation (4) Environment-friendly (CO2 emission reduction) power generation (5) Stable power supply (power supply without power outage)
There is one that reduces the computer load and prevents the complex response of the local voltage reactive power adjustment device to perform voltage reactive power monitoring control that meets the needs of the operator (for example, see Patent Document 1).

 In addition, the internal state of the power system is estimated by calculating the required information from the power system subject to voltage reactive power control. Control device obtained by estimating the power flow state, creating multiple control device combination candidates with control effects from a plurality of control device combination candidates at an arbitrary time, obtaining the power flow state reflecting the control device combination, and obtaining the control device combination For combination candidates, check whether each control device combination candidate can transition in time, create a state transition diagram, find a combination over multiple hours that minimizes the evaluation function given in advance, When controlling the reactive power voltage of the power system, select the optimal control device for the predicted future system across multiple sections and create a control schedule. Is the (e.g., see Patent Document 2).

  In recent years, for global warming issues (operational objective (4)), it is possible to summarize the supply and demand plans of multiple power generation companies and confirm the amount of greenhouse gas emissions and pollution-causing gas emissions over a wide area In addition, by simply calculating not only emissions but also environmental coefficient multiplication values, the magnitude of the impact of greenhouse gases and pollution-causing gases on the environment can be determined by gas type, emission time zone, and emission region factors. There is one that can be provided to the user as an index shown in a form including the symbol (for example, see Patent Document 3).

  In addition, for load frequency control with excellent economy (operational purposes (1) and (3)), even if the current output is close to the upper and lower limit values, the transition of the output band, which is a restriction on the output adjustment of the generator, There is also one that can quickly shift the output band (for example, see Patent Document 4).

JP 2003-259555 A JP 2008-271750 A JP 2008-11642 A JP 2008-42961 A

  However, supervisory control of the power system supervisory control system has not yet been fully automated in the following situations, and requires manual control by the operator.

(1) Supply / demand control when the weather (weather, temperature, etc.) is not as predicted, there is a large difference between the demand forecast predicted on the previous day and the demand on the day, and supply / demand control based on the power generation plan is insufficient (2) Accident (failure) recovery operation when a power failure occurs due to a system failure (failure) due to lightning strikes, etc.
(3) Supply and demand control and voltage reactive power control in the morning demand rise, sudden demand fluctuation time period during the lunch break FIG. 14 is a graph showing an example of the total demand curve for one day. The solid line shows the actual performance curve S1 of the day, and the dotted line shows the demand prediction curve S2 of the previous day. Generally, the daily demand curve has a rising demand in the morning near the time point t1, and there is a sudden change in demand during the lunch break near the time point t2. A power generation plan is made based on S2, and the power system is operated. In this case, when there is a large difference between the predicted demand forecast and the demand on the day, the demand and supply control based on the power generation plan is insufficient, so the demand and supply control is performed to meet the demand on the day.

  For example, if the power grid monitoring and control system functions such as supply and demand control and voltage reactive power control differ from the operator's idea, or if it is determined that automatic control is insufficient, the operator performs manual control. Yes.

  Currently, in order to reduce the manual control of operators and promote automation, the power system monitoring and control system is being upgraded, but the judgment of the operators (individuals / teams) according to the circumstances is always the same In some cases, it is difficult to unify functional improvements to automate the contents of manual control.

  The purpose of the present invention is to evaluate the manual control of the operator and analyze it in the short and long term, to standardize the manual control, adopt the operator's idea, and improve the direction of functional enhancement and improvement. It is to provide a power system monitoring and control system having an evaluation / analysis function that can be found.

  The power system monitoring and control system according to the present invention monitors the state quantity of the power system, performs the supply and demand control so that the state quantity is within the allowable range of the reference value in consideration of the economic load distribution, and the operation results of the system equipment. A monitoring control means for performing system operation evaluation, an operation record storage section for storing input / output data for monitoring control by the monitoring control means as an operation record, and results of operation / manual control performed by an operator. Operation recording means for storing the operation record in the operation record storage unit as an operation record, and evaluation means for evaluating the operation of the day using an evaluation standard set in advance for the operation record stored in the operation record storage unit It is characterized by that.

  According to the present invention, the operator's manual control is evaluated and analyzed in the short and long term, the manual control is standardized, the operator's idea is adopted, and the direction of functional enhancement and improvement is improved. It is possible to provide a power system monitoring and control system having an evaluation / analysis function that can be found.

The block diagram of Example 1 of the electric power system monitoring control system which concerns on embodiment of this invention. The graph (frequency performance) which shows an example of the evaluation result with respect to the load frequency control LFC which is one function of the monitoring control means in embodiment of this invention. The graph (system voltage track record) which shows an example of the evaluation result with respect to the voltage reactive power control VQC which is one function of the monitoring control means in embodiment of this invention. The graph (system voltage finish) which shows an example of the evaluation result with respect to the voltage reactive power control VQC which is one function of the monitoring control means in embodiment of this invention. The chart figure which shows an example of the radar chart which comprehensively evaluates the operational performance on the day in the evaluation means 16 in embodiment of this invention. The block diagram of Example 2 of the electric power system monitoring control system which concerns on embodiment of this invention. The block diagram of Example 3 of the electric power system monitoring control system which concerns on embodiment of this invention. Generating costs and CO ₂ emissions per month graph showing the evaluation and transition of total demand P of the Example 3 according to the embodiment of the present invention. The graph which shows the operation performance evaluation (period: 1 month) of several operator AE in Example 3 in embodiment of this invention. The graph which shows the operation performance evaluation (overall) (period: one month) by the combination of several operator AE in Example 3 in embodiment of this invention, and operator (long) FH. The block diagram of Example 4 of the electric power system monitoring control system which concerns on embodiment of this invention. The graph which shows an example of the operation guide which is a process result of the operation guide preparation means in Example 4 in embodiment of this invention. The block diagram of Example 5 of the electric power system monitoring control system which concerns on embodiment of this invention. The graph which shows an example of the total demand curve of a day.

  Embodiments of the present invention will be described below. FIG. 1 is a configuration diagram of Example 1 of the power system monitoring control system according to the embodiment of the present invention. The console 11 is used by the operator 12 to perform screen operations and manual control, and includes a display device, a keyboard, a touch panel, a mouse, and the like. The contents of the operation / manual control performed by the operator 12 via the console 11 are input to the operation recording means 13, and the operation recording means 13 operates as the operation record using the result of the screen operation / manual control performed by the operator. Save in the record storage unit 14. The monitoring control means 15 monitors the state quantity of the power system, performs supply and demand control so that the state quantity is within the allowable range of the reference value in consideration of the economic load distribution, The system operation evaluation is performed, and input / output data for monitoring control by the monitoring control unit 15 is stored in the operation record storage unit 14 as an operation record. The evaluation unit 16 evaluates the operation on the current day using an evaluation standard 17 set in advance with respect to the operation record stored in the operation record storage unit 14 and outputs the evaluation result 18.

  That is, the monitoring control unit 15 stores the input / output data (control result and the like) in the operation record storage unit 14. Further, the operation record function 13 stores the result of the screen operation / manual control performed by the operator from the console 11 in the operation record storage unit 14. On the basis of the evaluation criteria 17 set in advance, the evaluation unit 16 determines the power system from the result of the monitoring control unit 15 of the day stored in the operation record storage unit 14 and the result of the screen operation / manual control performed by the operator. The operation results of the monitoring control system are objectively scored and evaluated, and output as an evaluation result 18.

  Next, the evaluation standard 17 and the evaluation result 18 in the evaluation means 16 will be described. FIG. 2 is a graph (frequency record) showing an example of the evaluation result 18 for the load frequency control LFC which is one function of the monitoring control means 15. The load frequency control LFC performs output control of the generator on the order of several seconds so as to keep the frequency in the area managed and controlled by the power system monitoring and control system stable, and the reference frequency is constant in that area. In this example, the reference frequency is 50 Hz, and the allowable width is a result of performing control to keep the frequency within 0.05 Hz.

In this example, as the frequency stability evaluation, a determination is made based on the total time that the frequency performance deviates from the allowable range within the evaluation period. That is, the determination is made based on the total time of the portion indicated by a dotted circle. A time (departure limit time) for determining that the operation performance is poor is set in the evaluation standard 17 in advance. The value of frequency stability evaluation is calculated by equation (1). The lower the frequency deviation time, the higher the score.

  3 and 4 are graphs showing an example of evaluation results for the voltage reactive power control VQC, which is one function of the monitoring control means 15, FIG. 3 is a graph of system voltage results at monitoring points, and FIG. It is a graph of the system voltage finish of.

One purpose of the voltage reactive power control VQC is to maintain the system voltage of the power system managed and controlled by the power system monitoring and control system. In the system voltage maintenance, voltage reactive power control devices (generators, phase adjusting equipment, Control transformers). In this example, the reference voltage Vrefi is 275 kV, and the permissible width Epsi indicates the result of performing control to contain the system voltage V within 2 kV. In this example, the value Ei of time integration of the difference between the system voltage Vi at the monitoring point i and the reference voltage Vrefi (filled portion in FIG. 3) is calculated by the equation (2).

Then, the finish [Vi] (time t1 to t2) of the system voltage Vi at the monitoring point i is calculated by the equation (3).

Further, an average value [V] of n monitoring points is calculated as shown in Equation (4).

FIG. 4 shows these two values. The results of formulas (3) and (4) show the results of operation of voltage reactive power control as to what is the finish [Vi] of the system voltage Vi at the monitoring point i when the allowable width Epsi is the reference unit (ε = 1). It indicates whether it is within the side. The smaller the value is, the better it is. If it is 1.0 or more, it indicates that it is not within the allowable width Epsi, and it is judged that the control result is poor. The system voltage maintenance evaluation is calculated and evaluated by the equation (5).

  Next, as an example of evaluation items, an example of power generation cost, which is one of the evaluation results for the power generation plan and supply / demand control (economic load distribution EDC), which are one function of the monitoring control unit 15, will be described.

The total supply capacity (total demand) of the power system under the jurisdiction of the power system monitoring and control system is the sum of the outputs Pj (kWh) of the generator j of the power system and is expressed by equation (6).

The total power generation cost is the sum of the output Pj (kWh) of the generator j of the power system under the jurisdiction of the power system monitoring control system multiplied by the unit price Pcostj (yen / kWh) for each generator. It is shown by the formula.

This is the power generation cost for each hour, and 24 hours is the power generation cost for one day. Then, each power generation cost divided by the total supply capacity is the average of each power generation cost. The average power generation cost is shown in equation (8).

In a company that operates and manages a power system monitoring and control system, an average annual power generation cost is set as a target value in advance. The evaluation of the operation performance of the power generation cost is high if it is operated at a power generation cost smaller than the target value. The power generation cost evaluation is performed by calculating the power generation cost of the day when the power generation cost target value is 1, as shown in the equation (9), and the scoring is calculated by multiplying the full score by the reciprocal thereof.

Next, as an example of an evaluation item, an example of greenhouse gas emission, which is one of evaluation results for power generation planning and supply / demand control (economic load distribution EDC), which are one function of the monitoring control unit 15, will be described. . Here, carbon dioxide CO ₂ emission (g-CO ₂ ) is taken as an example of the greenhouse gas. The amount of carbon dioxide CO ₂ emission is calculated as the emission amount CO ₂ j (g-CO ₂ / kWh) per unit output (kWh) (CO ₂ emission original unit price) for each generator j from the past operation results. ing. The total amount of CO ₂ emission on that day is the period t1 of multiplying the output P j (kWh) of the generator j on that day by the CO ₂ emission unit price (g-CO ₂ / kWh), as shown in equation (10). It is calculated by an integral value of ~ t2.

The CO ₂ emission unit price of the entire company that operates and manages the power system monitoring and control system is obtained by dividing the total CO ₂ emission amount by the total supply capacity, as shown by the equation (11).

In a company that operates and manages a power system monitoring and control system, the annual CO ₂ emission unit price of the entire company is set as a target value in advance. The evaluation of the operation results of the CO ₂ emission amount becomes a high score if it is operated at a CO ₂ emission original unit price smaller than the target value. (12) As in, calculating the day of the CO ₂ emissions bid when one of CO ₂ emissions bid target, scoring is calculated by multiplied by the reciprocal scale.

Next, as an example of an evaluation item, an explanation will be given by taking an example of evaluation of system facility operation results such as system facility planning and system operation, accident recovery operation, supply and demand control, which are one function of the monitoring control means 15. Here, as the operation results of the system facilities, attention is paid to the following operation, and the evaluation is performed by scoring a penalty (decrease) in case of violation as in equation (13). The system facilities operation penalty items are as follows.
(A) Accident recovery in the event of a power failure due to lightning strikes (power failure range, power failure time)
(B) Transmission line overload power generation

FIG. 5 is a chart showing an example of a radar chart that comprehensively evaluates the operational performance of the day. This is an example shown in a radar chart for comprehensive evaluation based on these evaluation items described above. Evaluation results for the evaluation criteria K0 for the evaluation items for frequency stability, system voltage maintenance, power generation cost, CO ₂ emissions, and system equipment operation are all 100, and the evaluation result K1 of the day is also displayed. K1 can be objectively determined. With respect to the evaluation standard K0 set in advance based on the operational purpose and operational constraints of each function, it is possible to clarify which item the operator of the day focused on.

  FIG. 6 is a configuration diagram of Example 2 of the power system monitoring control system according to the embodiment of the present invention. In the second embodiment, an evaluation standard formulation means 19 is additionally provided to the first embodiment shown in FIG. 1, and an operator console 11a used by the operator 12a and 11b used by the operator (longer) are provided. The operator (chief) prepares a command for formulating an evaluation standard from the console 11b. The same elements as those in FIG. 1 are denoted by the same reference numerals, and redundant description is omitted.

  When an instruction to formulate an evaluation standard is input from the console 11b, the evaluation standard formulating unit 19 formulates an evaluation standard in accordance with the operation status of the day based on the operation record stored in the operation record storage unit 14, The established evaluation standard 17 is output to the evaluation means 16. The evaluation unit 16 evaluates the operation on the day using the evaluation standard formulated by the evaluation standard formulation unit 19.

  As an example of the evaluation standard formulated by the evaluation standard formulation unit 19, the power generation cost that is one of the evaluation results for the power generation plan and the supply and demand control (economic load distribution EDC), which are one function of the monitoring control unit 15 listed in the first embodiment. An example using the evaluation item will be described.

  The power generation plan and the supply and demand control function that will be used on the previous day and the current day are used to control the output control of each generator with the input of the predicted future power system state (including demand fluctuation) from a few minutes to the next day to a few days ahead. Is what you do. Demand that fluctuates due to the weather on the day, generator output using natural energy, and sudden system failures (failures) are uncertain items. To find the optimal solution in the power generation plan and supply / demand control function Expands each constraint, calculates the optimal solution, and determines the output control of the generator.

  Therefore, in order to formulate an evaluation standard with the power generation cost as an evaluation item, the evaluation standard formulation means 19 takes out data corresponding to the uncertain item from the operation record storage unit 14 in which the operation result of the day is stored as actual data. Suppose as input data for simulation to re-verify the operation of the day, calculate the optimal solution in the supply and demand control function, formulate the power generation cost target value to evaluate the operation of the day by summing the power generation costs by the momentary generator output To do.

  Instead of the power generation cost target value determined in advance based on the annual average of the first embodiment, it is possible to calculate the power generation cost target value in accordance with the operation of the day and evaluate the power generation cost using the equation (9). is there. That is, it is possible to use the power generation plan excluding uncertainties and the output of the generator by the supply and demand control function as a reference, and the evaluation according to the power system state of the day can be performed.

  In this way, the evaluation standard formulation means 19 that formulates the evaluation standard 17 from the operation record storage unit 14 can automatically formulate evaluation items and standard values in accordance with the operational status of the day. ) 12b can re-devise and change the evaluation standard 17 from the console 11b using the evaluation standard formulation means 19.

  FIG. 7 is a configuration diagram of Example 3 of the power system monitoring control system according to the embodiment of the present invention. In the third embodiment, an evaluation analysis unit 20 is additionally provided to the second embodiment shown in FIG. 6, and the evaluation standard formulation unit 19 is based on the operation record stored in the operation record storage unit 14. In addition to the evaluation criteria according to the operational status, the long-term evaluation criteria 21 based on the long-term operational status of several days to one year is formulated, and the evaluation analysis means 20 uses the long-term evaluation criteria 21 for long-term operation. The evaluation analysis suitable for the operational status is performed and output as the long-term evaluation analysis result 22. The same elements as those in FIG. 6 are denoted by the same reference numerals, and redundant description is omitted.

  In the evaluation analysis means 20, on the basis of the long-term evaluation criteria 21 established by the evaluation criteria formulation means 19, screen operations / manual operations performed by the operator during a period of several days to about one year stored in the operation record storage unit 14 The result of the control is evaluated, analyzed using a statistical method or the like, and output as a long-term evaluation analysis result 22.

  An example of the results of the long-term evaluation standard 21 formulated by the evaluation standard creation means 19 and the long-term evaluation analysis result 22 analyzed by the evaluation analysis means 20 will be described.

FIG. 8 is a graph showing a monthly evaluation of the power generation cost C and the CO ₂ emission amount and the transition of the total demand P. The power generation cost C and the CO ₂ emission amount as evaluation items are calculated according to the evaluation criteria described in the first embodiment. As auxiliary data for evaluation analysis, elements of weather (weather, average temperature, etc.) and elements of demand forecast / power generation plan (difference between forecast / plan and actual results) are displayed and analyzed on the same time axis. It is possible. Here, the total demand record can be displayed, and the causal relationship between the change in the total demand P for each day and the fluctuations in the power generation cost C and the CO ₂ emission amount can be clearly displayed.

Table 1 is a table showing operation performance evaluation (period: one month) of a plurality of operators A to E, and FIG. 9 is a graph thereof. Here, for the sake of simplicity, an example is shown in which the long-term evaluation criteria 21 are the same items and criteria as in the first embodiment.

That is, the operation performance evaluation of the operators A to E is shown for the frequency stability f, the system voltage maintenance V, the power generation cost C, the CO ₂ emission amount, the system facility operation U, and the total T. First, the average value of the evaluation for one month is calculated for each item, the vertical axis is taken, the operators A to E in charge are plotted on the horizontal axis, and the evaluations for each operator A to E are compared. By doing so, the difference in the way of thinking (needs) for the operation of each power system monitoring and control system in charge becomes clear. For example, it can be seen that operators A, B, and C tend to perform grid operation with priority on grid facility operation U, and operator D tends to perform grid operation with priority on frequency stability f.

Table 2 is a table showing operation performance evaluation (overall) (period: one month) by a combination of a plurality of operators A to E and operators (long) F to H, and FIG. 10 is a graph thereof.

  That is, the evaluation of the combination of the operators A to E and the operators (long) F to H who are in charge of the total points for a period of one month is displayed in a graph.

When paying attention to one person in charge, the operator (chief) who can be operated with high evaluation (overall points) can be identified, and the appropriate combination with the chief becomes clear. For example, operator C can operate with high evaluation (overall score) when operator (long) F, and operator E tends to operate with high evaluation (overall score) when operator (long) H. . In this way, the evaluation result can be objectively determined.

  Long-term analysis clarifies the characteristics of individual drivers or teams against standardized evaluation criteria based on the operational purpose and operational constraints of each function, and standardizes manual control procedures for operators Can provide materials that can be considered. Further, the contents can be fed back to the functional specification of the monitoring control means 15 to provide a document that can be considered for enhancement and improvement of the function.

  FIG. 11 is a configuration diagram of Example 4 of the power system monitoring control system according to the embodiment of the present invention. In the fourth embodiment, an evaluation result storage unit 23, an evaluation result storage unit 24, a search unit 25, and an operation guide creation unit 26 are added to the third embodiment shown in FIG. The same elements as those in FIG.

  The evaluation result storage unit 23 stores the evaluation result 18 evaluated by the evaluation unit 16 and the long-term evaluation analysis result 22 evaluated by the evaluation analysis unit 20 in the evaluation result storage unit 24. In addition, the search unit 25 uses the operation record stored in the operation record storage unit 14 based on the search condition specified by the operator 12c who makes a power generation plan, and the evaluation result and long-term evaluation analysis result stored in the evaluation result storage unit 24. The search result 27 is retrieved and the operator is notified of the search result 27, and the operation guide creation means 26, based on the search result 27 of the search means 25, from the operation record storage section 14 and the evaluation result storage section 24 in the past closest to the operation on the current day or next day. The operation guide 28 for operation support is presented to the operator.

  That is, the evaluation result storage unit 23 stores the evaluation result 18 in the evaluation unit 16 and the long-term evaluation analysis result 22 in the evaluation analysis unit 20 in the evaluation result storage unit 24, and the operator 12 c uses the search unit 25. The operation record storage unit 14 and the evaluation result storage unit 24 are searched using the operation status and evaluation criteria on that day or the next day as search conditions, and past operation results can be confirmed by the search result 27. Then, an operation result corresponding to the search result 27 is extracted from the operation record storage unit 14 and the evaluation result storage unit 24 in cooperation with the search unit 25 by the operation guide creation unit 26 and operation support for each function of the monitoring control unit 15 is performed. It is possible to present an operational guide for

  As an example of processing contents of the search unit 25 and the operation guide creation unit 26, an operation guide for a power generation plan, which is one function of the monitoring control unit 15 listed in the first embodiment, will be described as an example.

  FIG. 12 is a graph showing an example of the operation guide that is the processing result of the operation guide creation means 26. In order to obtain an operation result corresponding to the operation status of the next day, the operator uses the search means 25 to search the past equivalent of the operation result corresponding to the operation status of the next day from the operation record storage unit 14. Search operation results. For this purpose, the search means 25 performs a search using the shape of the total demand curve, the range of the maximum demand, the weather, the scheduled work stoppage of the generator, and the like as search conditions.

  Next, selection of an evaluation item as listed in the first embodiment, evaluation (evaluation score or higher), and the like are input as search conditions, and an operation date with a high evaluation is searched from the evaluation result storage unit 24. For example, operation days with a score equal to or higher than a certain score for the evaluation item “frequency stability” are extracted. In this way, it is possible to search based on operational status and evaluation items.

  Further, the operation guide creation means 26 extracts and edits the operation results corresponding to the search result 27 from the operation records stored in the operation record storage unit 14 and the evaluation results 18 evaluated by the evaluation means 16. As shown in FIG. 12, it is possible to create an operation guide that represents the start / stop of the generators GA, GB, and GC and the output status for the predicted total demand P.

  In this way, by searching for highly evaluated operation results from past evaluation results, creating the operation guide 28 and displaying it for reference to the operator, it is possible to prevent bias in the individual thoughts and judgments of the operator, / Standardization of manual control can be achieved.

  FIG. 13 is a configuration diagram of Example 5 of the power system monitoring control system according to the embodiment of the present invention. In the fifth embodiment, monitoring control correction means 29 is added to the fourth embodiment shown in FIG. The same elements as those in FIG. 11 are denoted by the same reference numerals, and redundant description is omitted.

  The monitoring control correction means 29 is based on the operation record stored in the operation record storage section 14 and the evaluation result 18 stored in the evaluation result storage section 24 and the long-term evaluation analysis result 22 according to the instruction of the operator 12c. The monitoring control correction data 30 for correcting a part of the input / output data for the monitoring control 15 is generated, and the monitoring control correction data 30 is output to the monitoring control means 15.

  That is, in order to realize optimum control in accordance with the actual operation by the monitoring control means 15, the operation record stored in the operation record storage unit 14, the evaluation result 18 stored in the evaluation result storage unit 24, and the long-term evaluation analysis result The monitoring control correction data 30 is created by the monitoring control correction means 29 based on the data 22 and given as input data to the monitoring control means 15.

  As an example of the processing contents of the monitoring control correction means 29 and the monitoring control correction data 30, description will be made by taking as an example the monitoring control correction for the load frequency control LFC and the power generation plan which are one function of the monitoring control means 15 listed in the first embodiment. To do.

  As the long-term evaluation analysis result 22, the characteristics of the operators A to E are clarified based on the operation performance evaluation of the operator as shown in FIG. The operator who creates the power generation plan for the next day confirms in advance the characteristics of the operator in charge of supply and demand control for the next day.

  When it is confirmed that the evaluation item of the frequency stability f is low, the operator 12c in charge of the power generation plan has the remaining operating capacity of a hydroelectric generator or a high-speed thermal power generator with a fast generator output change speed in order to cope with a rapid frequency fluctuation. It is necessary to create a power generation plan that always ensures For this reason, the monitoring control correction means 29 is used to set correction data that expands the generator remaining power constraint, which is one of the constraints on the optimal calculation of the power generation planning function, as the monitoring control correction data 30.

When the generator surplus power constraint is defined as in the equations (14) and (15) and the monitoring control correction data 30 is set as the generator surplus power correction coefficient α, the monitoring control correction means 29 sets α as in the equation (16). calculate.

α: Generator remaining power correction coefficient Kup: Increased reserve capacity target value (MW)
uj: 0-1 variable indicating that the generator j is in operation (0: stop, 1: operation)
Pmaxj: output upper limit of generator j (MW)
ΔPupj: Output change speed of generator j (in the increasing direction) (MW / min)

α: Generator remaining power correction coefficient Kdn: Target value to secure lowering power (MW)
uj: 0-1 variable indicating that the generator j is in operation (0: stop, 1: operation)
Pminj: Output lower limit of generator j (MW)
ΔPdnj: Output change speed of generator j (down direction) (MW / min)

  The operator in charge of supply and demand control with a low frequency stability evaluation has a larger generator surplus correction coefficient α, and a power generation plan in which the generator surplus power is secured. As a result, in the frequency control LFC of the day, a controllable generator is secured, and an operation in which the frequency stability with little frequency deviation is highly evaluated is possible. In this way, by creating a power generation plan that matches the characteristics of each operator, the operation does not vary depending on the characteristics of each operator, and all operators can operate with a certain evaluation.

DESCRIPTION OF SYMBOLS 11 ... Console, 12 ... Operator, 13 ... Operation record means, 14 ... Operation record preservation | save part, 15 ... Monitoring control means, 16 ... Evaluation means, 17 ... Evaluation criteria, 18 ... Evaluation result, 19 ... Evaluation criteria formulation means , 20 ... evaluation analysis means, 21 ... long-term evaluation criteria, 22 ... long-term evaluation analysis results, 23 ... evaluation result storage means, 24 ... evaluation result storage section, 25 ... search means, 26 ... operation guide creation means, 27 ... search results 28 ... Operation guide 29 ... Monitoring control correction means 30 ... Monitoring control correction data

Claims (5)

  Monitoring control means for monitoring the state quantity of the power system and taking into account the economic load distribution, performing supply and demand control so that the state quantity is within the allowable range of the reference value and evaluating the system operation of the operation results of the system facilities; , An operation record storage unit for storing input / output data for monitoring control by the monitoring control means as an operation record, and a result of operation / manual control performed by an operator as an operation record stored in the operation record storage unit Power system monitoring control, comprising: an operation recording means for performing an evaluation on the current day using an evaluation standard set in advance for the operation record stored in the operation record storage unit system.   Based on the operation record stored in the operation record storage unit, there is provided an evaluation standard formulation means for formulating an evaluation standard in accordance with the operational status of the day, and the evaluation means uses the evaluation standard formulated by the evaluation standard formulation means The power system monitoring and control system according to claim 1, wherein the operation on the day is evaluated.   In addition to the evaluation criteria based on the operational status of the current day based on the operational records stored in the operational record storage unit, the evaluation criteria formulating means provides a long-term evaluation based on the long-term operational status of several days to one year. 2. An evaluation analysis unit that formulates a standard and performs an evaluation analysis suitable for an operation status of a long-term operation based on the long-term evaluation standard formulated by the evaluation standard formulation unit. Power system monitoring and control system.   Evaluation result storage means for storing the evaluation result evaluated by the evaluation means and the long-term evaluation analysis result evaluated by the evaluation analysis means in an evaluation result storage section, and the operation record storage section based on a search condition designated by an operator Search means for searching the operation record stored in the evaluation result and the evaluation result or long-term evaluation analysis result stored in the evaluation result storage unit, and notifying the operator of the search result, and the operation record based on the search result of the search means An operation guide creating means for retrieving a past operation result closest to the operation on the current day or the next day from the storage unit and the evaluation result storage unit and presenting an operation guide for operation support to an operator is provided. The power system monitoring control system according to claim 3.   Input / output data for monitoring control of the monitoring control means based on the operation record stored in the operation record storage unit, the evaluation result stored in the evaluation result storage unit and the long-term evaluation analysis result according to an instruction of the operator 5. The power system monitoring and control system according to claim 4, further comprising monitoring control correcting means for correcting a part of the power system.

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