JPH06187058A - Power facility operation control method - Google Patents

Abstract

PURPOSE:To converge the voltage and reactive power of a system to a target value with minimum operations and to equalize an equipment service life term by equalizing the time of operations of equipments by deciding the procedure of minimum operations based on the latest change amount of the voltage or power of power facility corresponding to the judged result of a control direction. CONSTITUTION:The controlled variable of the voltage or reactive power is detected (ST1) and the control direction such as increasing/decreasing the voltage or reactive power for controlling it to a proper value is judged (ST2). Latest change amount data 4 of the voltage or reactive power at the time of once operating each transformer tap or phase control facility are received, and the procedure of minimum operations is decided corresponding to the judged result of the control direction. (ST3). On the other hand, it is judged whether there are plural minimum procedures or not (ST5) and when there are plural procedures, the equipment with minimum operations is selected out of controlled system equipments (ST6) while receiving accumulated operation time data 7 of respective transformer taps and phase control facilities. Then, the selected equipment is decided (ST8) and an operating command is sent to the equipment (ST9).

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a power equipment operation control method for operating and controlling power equipment connected to a power system in a power plant or a substation.

[0002]

2. Description of the Related Art FIG. 2 shows, for example, JP-A-63-093017.
2 is a flow chart showing a conventional power equipment operation control method disclosed in Japanese Patent Publication No. JP-A-2003-242, in which voltage and reactive power are given certain target values, and the current voltage and reactive power are compared with each other to determine that they are necessary. The device to be controlled and the control direction are determined from the control amount to be controlled.

First, ST21 is an input step of reading a predetermined voltage and reactive power, and ST22 is a step S.
The first monitoring step of taking in the current voltage and reactive power of T21 and monitoring the current state, ST23 is the target obtained in the input step ST21 with the current voltage and reactive power obtained in the first monitoring step ST22. This is a predicting step in which it is judged whether or not there is a problem in the value and the load is predicted for the time being.

In addition, ST24 is a first control step for operating equipment such as a transformer tap and a circuit breaker of a phase-adjusting equipment in order to make the system state according to the result of the prediction step ST23. ST25 is a second monitoring step for monitoring whether or not a sudden load change has occurred while the vehicle is operating at the target value given in step ST21.

Next, ST26 is a judgment step for judging whether or not the prediction result of step ST23 is optimum when a sudden load change occurs, and ST27 is a system state according to the judgment result of judgment step ST26. To operate devices such as transformer taps and circuit breakers for phase-adjustment equipment.
Control step.

FIG. 3 shows the first and second control steps ST.
24 is a flow chart showing the details of step ST27, where ST1 is a control amount detecting step for detecting control amounts of voltage and reactive power, and ST2 is voltage raising or lowering or reactive power for controlling the voltage and reactive power to appropriate values. This is a control direction determination step of determining the control direction such as increase or decrease of.

Further, ST8 is a control direction determination step ST
Operation device determining step for deciding the device to be operated according to the result of step 2, ST9 is an operation output step for sending the operation command to the device in response to the result, ST10 is an operation for monitoring the system state of the result of operating the device The result state monitoring step, ST11, is an operation amount determination step of determining whether or not the operated amount is appropriate.

FIG. 4 is a block diagram showing a power facility having a voltage and reactive power control device for implementing the above power facility operating method. In the figure, 31 is a system load connected to the power system, and 32, 33. And 34 and 35 are current transformers and meter transformers that are connected to two generator systems to detect current and voltage, and 30 is a current transformer 32,
33 is a voltage and reactive power control device that is connected to the transformer 33 and the instrument transformers 34 and 35 to detect current and voltage and operate and control the following power equipment.

Further, 36 and 37 are circuit breakers, 38 and 39 are transformers, 40 and 41 are tap changers of the transformers 38 and 39, 42 and 43 are generators connected to the transformers 38 and 39, Reference numerals 44 and 45 are switches for phase adjusting equipment connected to the transformers 38 and 39, and reference numerals 46 and 47 are phase adjusting equipment.

Next, the operation will be described. Load fluctuation 31
If the system voltage and reactive power fluctuate due to factors such as the above, this is adjusted in order to supply stable power. This adjustment is the voltage predicted in advance in the substation or power plant,
The tap changers 40 and 41 of the transformers 38 and 39 are adjusted to control the reactive power, and the phasing equipment 46 and 47 are controlled and adjusted. Based on the deviation between the target value and the actual value of the system, the tap changers 40 and 41 of the transformers 38 and 39 are adjusted, and the phase adjusting equipment 46 and 47 are controlled and adjusted.

This adjustment control is performed according to the flow chart shown in FIG. That is, the control amount is calculated from the predicted value or the deviation value, and when the voltage is lower than the control target or the reactive power is on the delay side from the control target, the tap is raised or the phase advancing capacitor is connected to the grid. ,
When the voltage is higher than the control target or when the reactive power is on the leading side of the control target, the control direction is determined so as to lower the tap or separate the phase advancing capacitor from the system.

Then, the device to be operated is determined from the values of the voltage and the reactive power, among the tap changers 40 and 41 of the transformers 38 and 39 or the phase adjusting equipment 46 and 47, and the device operation output is sent. To do. After the operation, the actual value of the system is monitored again, and if the operation amount is not sufficient or does not reach the target value, this operation is repeated until the vicinity of the target value is reached.

[0013]

Since the conventional power equipment operation control method is implemented as described above, in the method shown in FIG. 3, the operation is repeatedly performed until the voltage and the reactive power respectively reach the target values. Therefore, if there are multiple control devices, as a result of excessive control, it becomes an iterative control of further pulling back, and it is necessary to perform many times of control until the state converges, and in order to select the device type, The same device such as a transformer tap may be controlled many times, and the maintenance period may be shortened due to uneven operation times.

The present invention has been made in order to solve the above-mentioned problems. From the improvement effect when the device operates, the device is made to converge to the target value with the minimum number of times of operation and the number of times of operation of the device is equalized. Thus, it is an object of the present invention to obtain a power equipment operation control method capable of realizing effective voltage and reactive power control by equalizing the device life periods.

[0015]

According to a first aspect of the present invention, there is provided a power facility operation control method, which comprises a control amount detecting step of detecting a voltage and a power control amount of a system of the power facility, and an optimum value of the voltage and power. Control direction determination step for determining the control direction such as raising or lowering the voltage or increasing or decreasing the power for the control, and the voltage or the power when one operation of the power equipment is performed according to the determination result of the control direction. In accordance with the determination of the procedure for operating the minimum number of times and the procedure for operating the minimum number of times, the operation device determining step for determining the equipment of the power facility to be operated And in the operation output step,
In response to the decision of the device, an operation command is sent to the device.

According to a second aspect of the present invention, there is provided a power facility operation control method, which comprises a control amount detecting step of detecting a control amount of voltage or power of a system of the power facility, and a step of controlling the voltage or power to an optimum value. According to the control direction determination step for determining the control direction such as voltage increase / decrease or power increase / decrease, and the result of the control direction determination, the latest variation data of the voltage or power when one operation of the power equipment is performed. In the case where there are a plurality of control number minimum procedure determining steps for determining the procedure to be operated at the minimum number of times and the procedure for operating at the minimum number of times by the above determination, the individual cumulative operation number data of the power equipment is received and the operation is performed. In order to equalize the number of times, the leveling control determination step of determining the priority of the control-target equipment from the equipment of the power facility that is the control-target candidate is performed, and the operation equipment determination step is performed. In accordance with the determination result of the priority described above is determined equipment power equipment operating at the operation output step is obtained so as to sent the operation command to the instrument receiving the decision of the apparatus.

[0017]

In the step of determining the minimum number of times of control in the invention of claim 1, the minimum number of times of control is determined by receiving the latest change amount data of voltage and electric power when one operation of the power equipment is performed according to the determination result of the control direction. By determining the operating procedure, it is possible to maintain a stable system configuration in a short time and prevent the occurrence of unnecessary operations such as hunting.

The leveling control determination step in the invention of claim 2 is a device type to be operated from the count result of the number of times of operation of each device when a plurality of procedures are obtained,
The device with the minimum number of times is selected from the device candidates on the same system, and the device to be selected in the operation device determining step is selected based on this.

[0019]

【Example】

Example 1. An embodiment of the present invention will be described below with reference to the drawings. In FIG. 1, ST1 is a control amount detecting step for detecting control amounts of voltage and reactive power, and ST2 is for determining a control direction such as raising or lowering voltage or increasing or decreasing reactive power in order to control the voltage and reactive power to appropriate values. This is a control direction determination step.

In ST3, the latest variation data of voltage and reactive power when one operation of the tap changers 40 and 41 of the transformers 38 and 39 and the phase adjusting equipment 46 and 47 is performed according to the control direction determination result. 4, the control number minimum procedure determining step for determining the procedure to be operated with the minimum number of times, ST5 is a candidate number determining unit for determining whether or not there are a plurality of procedures determined in step ST3.

Further, ST6 receives the cumulative operation number data 7 of the tap changers 40 and 41 of the transformers 38 and 39 and the phase adjusting equipment 46 and 47 when there are a plurality of procedure candidates, and equalizes the number of operations. , A leveling control determination step of determining the priority of the control target device from the control target candidates, ST
Reference numeral 8 is an operation device determining step for determining the device to be operated by obtaining each result of the control number minimum procedure determination and leveling control determination, and ST9 is an operation output step for receiving the result and transmitting an operation command to the device. .

Next, the operation will be described. System load 3
1 always fluctuates and is rarely constant,
It is possible to make predictions based on actual results in the past. Based on this prediction, operating target values are determined and controlled at each substation and at each generator at each power plant.

Regarding this control, the result of control is monitored to judge whether the controlled amount is proper, and the target value has not been reached, so further control is required.
Since it is near the target value, it is decided whether control is required.

At this time, if the control is repeated while observing the control result, the control value may fluctuate and the target value may be exceeded, or control may be performed contradictory between a plurality of generators or electric stations. However, it is possible to maintain a stable system configuration in a short time by previously determining the device to be controlled and the number of operations as a procedure for the control amount.

That is, after determining the required control amount detected in step ST1 in the control direction (step ST2), the latest transformers 3 are determined in step ST3 for determining the minimum control number procedure.
Changes in voltage and reactive power when taps 8 and 39 are increased by 1 tap, changes in voltage and reactive power when taps are decreased by 1 tap, and voltage when one phase adjusting device 46, 47 is connected to the system. Establish a necessary operation procedure to control to the target value based on each data of the change of reactive power and the change of voltage and reactive power when disconnecting one unit, and set the voltage and reactive power to the target value by the optimum control operation procedure. To maintain.

On the other hand, as a minimum procedure, when a plurality of plans are obtained, this is judged in step ST5,
Leveling control determination step S to equalize equipment life
From the cumulative operation number data 7 obtained as a result of counting the number of operations of each device in the past at T6, the device with the smallest number of operations is selected from the device candidates connected to the same system by the type of the device to be operated. .

Then, in the operation device determining step ST8, the device selected according to the procedure is determined, and the operation output step S
An operation command is sent to the device via T9, and the voltage and reactive power are maintained at the target values. The series of control for power equipment is performed by the voltage / reactive power control device 30.

Example 2. In the above embodiment, the control of the voltage and the reactive power was explained, but the control of the active power,
Even if the control is performed only by the voltage and the control is performed by the reactive power, the same effect as that of the above-described embodiment is obtained.

Example 3. Further, in the above embodiment, the transformer 3
8, 39 tap changers 40, 41 and phase adjusting equipment 4
Although the control in which the equipments 6 and 47 are used as the equipment of the electric power equipment has been described as an example, the control of the generator output and the control of the phase transformer also have the same effect as the above-described embodiment.

[0030]

As described above, according to the invention of claim 1, a control amount detecting step for detecting the control amount of the voltage and the power of the system of the power equipment, and the control amount detecting step for controlling the voltage and the power to the optimum value are provided. According to the control direction determination step for determining the control direction such as voltage increase / decrease or power increase / decrease, and the result of the control direction determination, the latest variation data of the voltage or power when one operation of the power equipment is performed. In response to the above, the minimum number of control steps for determining the procedure for operating the minimum number of times and the operation device determining step for determining the equipment of the power facility to be operated according to the determination of the procedure for operating the minimum number of times are performed. In the output step, since the operation command is sent to the device in response to the determination of the device,
There is an effect that the system can be stably maintained at the target value in a short time, and a system that can maintain a stable system state can be obtained.

Further, according to the invention of claim 2, a control amount detecting step of detecting a control amount of the voltage or power of the system of the electric power equipment, and a raising or lowering of the voltage for controlling the voltage or the power to an optimum value or In accordance with the control direction determination step for determining the control direction such as increase or decrease of the power and the determination result of the control direction, the latest change amount data of the voltage or the power when one operation of the power equipment is performed is received, and the minimum If there are multiple steps for determining the minimum number of control times to determine the procedure to operate by the number of times and the procedure to operate at the minimum number of times by the above determination, receive the individual cumulative operation number data of the power equipment and equalize this operation number. In order to do so, the leveling control determination step of determining the priority of the control-target equipment from the equipment of the power facility that is the control-target candidate is performed, and further, in the operation equipment determination step, the above-mentioned priority is applied. According to the determination result of 1., the equipment of the power equipment to be operated is determined, and the operation output step is configured to send the operation command to the equipment upon receiving the determination of the equipment, so that the same equipment is frequently controlled. Therefore, there is an effect that it is possible to obtain a product that can prolong the service life of the device.

[Brief description of drawings]

FIG. 1 is a flowchart showing a power facility operation control method according to an embodiment of the present invention.

FIG. 2 is a flowchart showing a conventional power equipment operation control method.

FIG. 3 is a flowchart showing details of control steps in a conventional power equipment operation control method.

FIG. 4 is a configuration diagram showing a power equipment operation system for executing a power equipment operation control method according to the related art and the present invention.

[Explanation of symbols]

 ST1 control amount detection step ST2 control direction determination step ST3 control number minimum procedure determination step ST6 leveling control determination step ST8 operation device determination step ST9 operation output step

Claims (2)

[Claims] 1. A power equipment operation control method for efficiently operating and controlling a plurality of power equipments connected to the same system,
A control amount detecting step for detecting a voltage or a control amount of power of the system of the electric power equipment, and a control direction such as raising or lowering the voltage or increasing or decreasing the power in order to control the voltage or the power to an optimum value. In accordance with the control direction determination step and the determination result of the control direction, the latest change amount data of the voltage and the power when one operation of the power equipment is performed is received, and the control number minimum procedure for determining the procedure for operating the minimum number of times A determining step, an operating device determining step of determining a device of the power facility to be operated according to the determination of the procedure of operating the minimum number of times, and an operation output step of receiving the determination of the device and sending an operating command to the device. An electric power facility operation control method characterized by executing. 2. A power facility operation control method for efficiently operating and controlling a plurality of power facilities connected to the same system,
A control amount detection step for detecting a voltage or a control amount of the power of the system of the power equipment, and a control direction such as raising or lowering the voltage or increasing or decreasing the power in order to control the voltage or the power to an optimum value. According to the control direction determination step and the determination result of the control direction, the latest change amount data of voltage and power when one operation of the power equipment is received, and the minimum control number procedure for determining the procedure for operating the minimum number of times When there are a plurality of determination steps and procedures for operating the minimum number of times by the above determination, the data of the individual cumulative operation times of the power equipment is received, and the equipment of the power equipment that is a control target candidate for equalizing the operation times A leveling control determination step of determining the priority of the control target device from among, and an operation device determination step of determining the device of the power facility to be operated according to the above priority determination result; Power equipment operation control method characterized by performing an operation output step of transmitting the operation command to the instrument receiving the decision of the apparatus.