JPH09322386A - Protection control device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To make it possible to grasp the good bad state of a setting value readily. SOLUTION: System information 111-2 at the present time is inputted. Then, the good or bad state of the setting value of internal information is judged by the judging expression of setting value (from system information)>internal information (present value) of protection relay device >=K in a state judging part 111 based on the adequate setting value and a limit value K introduced by simulation and the internal information 111-1 such as various kinds of the setting values, currents, voltages, impedances and the like transmitted from the protecting relay devices 101, 102 and the like on the other hand.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a digital protective control device for transmission and distribution lines which can be operated from a distance.

[0002]

2. Description of the Related Art FIG. 17 shows a remote configuration of an operation and maintenance function in a general electric station described in Vol. 50, No. 1 of the Electric Cooperative Research (published by The Electric Cooperative Research Group). In the figure,
Reference numerals 1401 and 1402 denote a digital protective relay device that performs a protective relay calculation by inputting the voltage and current of the power system,
Reference numerals 403 and 1404 denote I / F (interface) units for outputting information of the protective relay device to the outside, 1405 to 1407.
Is a transceiver that connects a plurality of digital protective relay devices, 1408 is a transmission device that puts information of a plurality of protective relay devices on a communication line 1409, and 1410 is a transmission that puts information of a personal computer or a workstation on the communication line 1409. The device 1411 is a personal computer, a workstation, or the like for displaying information of the protective relay device and sending information to the protective relay device.

Next, the operation will be described. The voltage or current of the system is calculated by the digital protective relay device 1401 to know the state of the system, and is compared with the set value set in the digital protective relay device 1401. Determine the element.

This is a digital protective relay device 1401.
From the I / F unit 1403 of the transceiver 1406 to 1
405, the transmission device 1408, the communication line 1409, and the transmission device 1410, and the result is sent to the personal computer or workstation 1411 as the electricity quantity information 1411-1 of the system transmitted from the protective relay device.
-4, and is displayed via the screen 1411-5.

[0005]

[Problems to be Solved by the Invention]

(1) The first and second inventions are system information such as graphic information of a single-line connection diagram of a power system, connection state information, impedance of a power transmission line configuring the single-line connection diagram, distance of the power transmission line, and transformer capacity. , The load connected to the grid will change year by year, and it will be inconsistent with the set value set in the protective relay. Therefore, the processing of the system information and the processing of the electricity quantity information of the system sent from the protection relay device installed in the electric facility are different from the computer 1411 shown in FIG. 17 (not shown). Computer 1 because it was processed in
In 411, it is difficult to grasp the quality of the settling of the protective relay that is currently settling.

The present invention has been made to solve the above problems, and provides a protection control device that enables a person who operates a protection relay device to easily grasp the quality of a set value. The purpose is to get.

(2) According to a third aspect of the invention, the process of determining the settling value of the protective relay element of each protective relay device is performed by a computer different from the protective relay device, and the calculated optimal settling value is converted into a transformer. I contacted the local workers and set the setpoints for the protective relay elements. However, since this series of operations requires human intervention, human error may occur.

The present invention has been made to solve the above problems, and a protection control device for preventing a human error that occurs when setting a set value of each protection relay element of a protection relay device. Aim to get.

(3) In the fourth to seventh inventions, although the load connected to the system changes year by year, the set value of the protective relay element of the protective relay device is the load at the time of settling. Since it is operated with the calculated set value, malfunction may occur due to load current.

The present invention has been made in order to solve the above problems, and protects a load of a changing power system from malfunction or malfunction due to mismatch of set values of protection relay elements. The purpose is to obtain a control device.

(4) In the eighth aspect of the invention, since the state and set value of the conventional protective relay device are selected for each device, it is impossible to compare the states of a plurality of devices. there were.

The present invention has been made to solve the above-mentioned problems, and a protection control device that enables confirmation of the states and set values of a plurality of protection relay devices in the form of a list. Aim to get.

(5) In the ninth aspect of the invention, it takes time to set the set value of the protection relay element of the conventional protection relay device because it is selected and set for each device. .

The present invention has been made in order to solve the above problems, and shortens the time by making it possible to set the set values of a plurality of protective relay devices on the screen in a list form. The purpose of the invention is to obtain a protection control device.

[0015]

[Means for Solving the Problems]

(1) The protection control device according to the present invention is a protection control device that has a calculation function and manages a protection relay device connected to the power system. Information, impedance of the transmission line that constitutes the single-line connection diagram, transmission line distance, system information such as transformer capacity, and the like, and this simulation result and various set values and currents transmitted from the protective relay device. , The quality of the settling value or the protection characteristic is judged according to the comparison with the internal information such as the voltage and the impedance.

(2) Further, in the protection control device having a calculation function and managing the protection relay device connected to the power system, the optimum value of the settling value is calculated from the system information of the power system, and the optimum value is calculated. The difference or ratio between the value and the settling value currently set in the protective relay device is obtained, and the quality of the settling value currently set is determined according to the obtained result.

(3) Further, in the protection control device which has a calculation function and manages the protection relay device connected to the power system, the optimum value of the settling value is calculated from the system information of the power system, and the optimum value is calculated. The value is set as the set value of the protective relay device.

(4) Further, in the protection control device having the calculation function and managing the protection relay device connected to the power system, the internal information transmitted from the protection relay device is replaced with the internal information at regular intervals. The maximum value / minimum value of is derived, and this maximum value / minimum value is compared with the settling value of the protective relay device,
An alarm is issued according to the comparison result.

(5) Further, in the protection control device having the calculation function and managing the protection relay device connected to the power system, the internal information transmitted from the protection relay device is changed to the internal information at regular intervals. It is possible to derive the maximum value / minimum value of, and display the relationship between the maximum value / minimum value, the locus of the electric quantity from the internal information, and the set value of the protective relay device on the screen for comparison. It was done like this.

(6) Further, in the protection control device having the calculation function and managing the protection relay device connected to the power system, the optimum value of the settling value is calculated from the system information of the power system, and From the internal information transmitted from the protective relay device, derive the maximum value / minimum value of the internal information at regular intervals,
The difference or ratio between the maximum value / minimum value and the set value of the protective relay device is calculated, and the difference or ratio is displayed together with the maximum value / minimum value. (7) Further, in any one of the above (4) to (6), when the protective relay device has a function of transmitting the maximum value / minimum value of the internal information for each fixed cycle, the internal information is used for the fixed cycle. Instead of deriving the maximum value / minimum value of the internal information for each time, the maximum value / minimum value of the internal information sent from the protective relay device for each fixed cycle is used.

(8) Further, in any one of the above items (1) to (7), screen display means is provided to set a screen of a system diagram and a plurality of protective relay devices connected to the system diagram. A screen in which a list of internal information such as values, maximum / minimum values, optimum values, etc. is displayed separately.

(9) Further, in any one of the above items (1) to (7), a screen display means is provided to set a screen of a system diagram and a plurality of protective relay devices connected to the system diagram. The screen on which the value can be set is displayed separately.

[0023]

BEST MODE FOR CARRYING OUT THE INVENTION

Embodiment 1. Hereinafter, a first embodiment of the present invention will be described with reference to the drawings. Note that FIG. 1 shows contents common to the first to twelfth embodiments, and different points are as follows.
Each embodiment will be described.

In FIG. 1, 101 and 102 are protective relay devices that detect an accident that has occurred in the power system and issue a command to disconnect the faulty section, and 103 and 104 are for outputting information of the protective relay device to the outside. I / F (interface) section, 1
Reference numeral 05-107 is a transceiver, 108 is a transmission device for putting information of a plurality of protective relay devices on the communication line 109, 110
Communicates information from a personal computer or workstation to the communication line 10
It is a transmission device that can be mounted on the 9.

Reference numeral 111 denotes a computer (protection control device) such as a personal computer or a workstation for displaying information of the protective relay device and sending information to the protective relay device. In the personal computer, workstation, etc. 111, the internal information 111-1 of the protective relay device sent from the protective relay device.
And a status determination unit 111-3 that determines the quality of the status based on the data of both the system information 111-2 that has already been input to the personal computer or workstation 111, and a display that controls the display of the determination result. Control unit 111-4, screen 1
It is composed of 11-5.

The operation will be described based on the processing flow chart of the protection control device of FIG. (1) In step 202, system information is input to a personal computer, a workstation or the like. This system information is not input from the protective relay device, but is separately input from the outside through an optical disk, a floppy disk, or a LAN.
Further, this system information includes graphic information of the single-line connection diagram of the current power system, information on the connection state, impedance of the transmission lines forming the single-line connection diagram, transmission line distance, transformer capacity, and the like.

(2) In step 203, a simulation is performed based on the system information, and the set value and limit value K of the protection relay element of the protection relay device are obtained. Note that these values are derived for each protective relay device.

(3) At step 204, the internal information of the protective relay device is input to a personal computer, a workstation or the like. (4) In step 205, it is selected whether or not to judge the quality of the setting of the protective relay device.

(5) When making a determination, step 206
The quality of the settling is judged by and the result is displayed on the screen. The judgment formula is settling value (from system information)> internal information of protection relay device (current settling value) ≧ K −−−−−−−−−−− (1), for example, the setting value is It is assumed that 120% of the rated voltage and K are 110% of the rated voltage, and the internal information is normal if it is within the range. The relationship between the settling value and the internal information may be, for example, internal information = settling value × 0.9.

(6) If the determination is not made, the process directly goes to step 207.

In addition to the above judgment formula (1), there is a case where set value <internal information of protective relay device ≦ K ---------- (2). For example, in the case of an undervoltage relay, set value = rated voltage × 70%, K = rated voltage × 80%, etc.

As described above, a computer such as a personal computer or a work station can easily determine the state of a protective relay device far away to a person who operates (operates) the system in order to judge whether the setting of the protective relay device is good or bad. Can be grasped.

Embodiment 2 FIG. The operation will be described based on the processing flowchart of the protection control device in FIG. (1) In step 302, system information is input to a personal computer, a workstation or the like. (2) In step 303, a simulation is performed based on the system information, and the optimum setting value of the protection relay element of the protection relay device is calculated and displayed on the screen.

(3) In step 304, the internal information of the protective relay device is input to a personal computer, a workstation or the like. (4) In step 305, it is selected whether to display the optimum value of the settling value of the protective relay element of the protective relay and the difference between the present settling value from the internal information.

(5) When displaying, step 306
The difference between the optimum settling value and the current settling value is displayed with. (6) If not displayed, the process directly goes to step 307.

The relationship between the current settling value and the optimum settling value will now be described. Taking an overcurrent relay element as an example, the current settling value is based on the system information at the time of settling, for example, settling value = minimum short-circuit current × 50% −−−−−−−−−−−− (3) Input it to the protective relay as a conditional expression and set it as the "current set value". The load connected to the grid changes year by year, and the minimum short-circuit current also changes. For this changed state (system state), the "optimum value of settling value" is calculated as the optimum value of settling value = minimum short-circuit current × 50%, similar to the conditional expression (3).

In the above description, the difference between the optimum settling value and the current settling value is compared and determined. However, the comparison may be performed by calculating the ratio.

As described above, a computer such as a personal computer or a workstation functions so as to display the optimum setting value of the protection relay element of the protection relay device. Therefore, the person who operates the system can easily understand the state of the distant protective relay device.

Embodiment 3 The operation will be described based on the processing flowchart of the protection control device in FIG. (1) In step 402, system information is input to a personal computer, a workstation or the like. (2) In step 403, a simulation is performed based on the system information, and the optimum value of the set value of the protection relay element of the protection relay device is calculated and displayed on the screen.

(3) In step 404, it is selected whether the settling value (current settling value) of the protection relay device located far away is changed. (4) When changing, in step 405, settling value data is sent out via the communication line to change the setting value of the protective relay device. (5) If no change is made, the process directly goes to step 406.

As described above, the optimum value of the settling value of the protective relay element of the protective relay device is calculated from the system information input to the personal computer, workstation, etc., and the result is installed in the electrical facility through the communication line. Since the setting value is automatically set by sending the setting value to the protection relay device, a human error that occurs when setting the setting value of each protection relay element of the protection relay device can be prevented.

Embodiment 4 The operation will be described based on the processing flowchart of the protection control device in FIG. (1) In step 502, the maximum value / minimum value data of the internal information of the protective relay device for every fixed period (for example, every day or every month) is used from the protective relay device by using the communication line, Send to a personal computer or workstation.

(2) In step 503, the sent data is compared with the set value of the relay element of the protective relay device. Maximum value-settling value = difference ------------------ (4) Minimum value-settling value = difference ------------ (-5)

(3) In Step 504, Step 50
As a result of comparison in 3, when the difference is not within a certain range (± k), that is, when | difference |> k −−−−−−−−−−−−−−−− (6),

(4) In step 505, a warning is given by a visual method such as characters and pictures on a screen of a personal computer or a workstation or an auditory method such as a bell or voice. (5) If it is within the range, the process directly goes to step 506.

The above judgment conditions (4), (5) and (6) can be summarized as follows: | maximum value-settling value |> k1 --------------- (7) | minimum value-settling The value |> k2 −−−−−−−−−−−−− (8) (k in the above equation (6) is determined to be a settling value when k = k1 = k2). The determination condition of such a ratio may be used. Maximum value / settling value> a −−−−−−−−−−−−−−− (9) If minimum value / settling value <b −−−−−−−−−−−−−− (10) , It is determined that the settling value is defective. Note that normally a = b
In many cases

As described above, the maximum value / minimum value of the internal information of the protective relay device for every fixed period is sent to a remote computer or workstation to set the relay element of the protective relay device. The function of notifying that there is a need to change is displayed on the screen of a personal computer or workstation by visual means such as letters or pictures, or by an audible way such as bell or voice. Therefore, it is possible to notify the operator of the changing load condition of the power system from a personal computer or workstation, and prevent malfunctions and malfunctions due to the mismatch of the setting values of the protection relay elements against the changing load of the power system. it can.

Embodiment 5 FIG. Although this embodiment has the same processing content as that of the fourth embodiment, in the fourth embodiment, there is a function of deriving the maximum value / minimum value for each fixed period in the protective relay device. Form 5 is a case where there is no function for deriving the maximum value / minimum value for each fixed period in the protective relay device, and that function is performed on the computer side.

The operation will be described based on the processing flowchart of the protection control device of FIG. (1) In step 602, data of internal information of the protective relay device is sent from the protective relay device to a personal computer, a workstation, etc. at any time (for example, at intervals of 1 second) using a communication line.

(2) In step 603, the maximum value / minimum value for each fixed period is obtained from the sent data. (3) In step 604, the maximum / minimum value data obtained in step 603 is compared with the set value of the relay element of the protective relay device. For the comparison, the conditional expressions (7) and (8) of the fourth embodiment are used.

(4) In Step 605, Step 60
If the result of comparison in 4 is not within a certain range, (5) in step 606, a visual method such as letters or pictures on the screen of a personal computer or a workstation or an auditory method such as a bell or voice is used. Warning. (6) If it is within the range, the process directly goes to step 607.

As described above, the maximum / minimum value for each fixed period is obtained from the internal information of the protective relay that is sent from the protective relay to the personal computer or the workstation at any time, and the relay element of the protective relay is obtained. It functions to inform the user of the need to change the settling value on the screen of a personal computer or workstation by a visual method such as letters or pictures, or an aural method such as a bell or voice. Therefore, it is possible to notify the operator of the changing load condition of the power system from a personal computer or workstation, and prevent malfunctions and malfunctions due to the mismatch of the setting values of the protection relay elements against the changing load of the power system. it can.

Embodiment 6 FIG. The operation will be described based on the processing flowchart of the protection control device in FIG. 7. (1) In step 702, the maximum value / minimum value data of the internal information of the protective relay device is communicated from the protective relay device at regular intervals (for example, every one month, every three months, every year). Use the line to send to a personal computer or workstation.

(2) In step 703, when the locus of the electric quantity (current, voltage, impedance, etc.) is displayed on the screen of the personal computer, workstation, etc., it is displayed in (3) step 704, and (4) is displayed. If not, the process directly goes to step 705.

FIG. 8 shows a display example of the locus, which displays the impedance plane of the distance relay element, and is in a position outside the operating range of the distance relay element under normal conditions (current value). When the system load is large, its operating range (zone of set value)
The protective relay is activated.

As described above, the maximum value / minimum value of the internal information of the protective relay device for every fixed period is sent from the protective relay device to a remote computer or workstation, and the amount of electricity (current, current,
Function to display the locus of voltage, impedance, etc.) on the screen of a personal computer or workstation. Therefore, it is possible to notify the operator of the changing load of the electric power system from a personal computer, a workstation, etc., and it is possible to prevent an erroneous operation or an erroneous operation due to the mismatch of the set values of the protection relay elements with respect to the changing electric power system load. .

Embodiment 7 FIG. Although this embodiment has the same processing content as that of the sixth embodiment, in the sixth embodiment, there is a function of deriving the maximum value / minimum value for each fixed period in the protective relay device. Mode 7 is a case where there is no function for deriving the maximum value / minimum value for each fixed period in the protective relay device, and that function is performed on the computer side.

The operation will be described based on the processing flow chart of the protection control device of FIG. (1) In step 802, the data of the internal information of the protective relay device is sent from the protective relay device to a personal computer, a workstation or the like at any time using the communication line. (2) In step 803, the maximum value / minimum value for each fixed period is obtained from the sent data.

(3) In step 804, when the locus of the electric quantity (current, voltage, impedance, etc.) is displayed on the screen of the personal computer, workstation, etc., (4) In step 805, the display as shown in FIG. do. (5) If not displayed, the process directly goes to step 806.

As described above, the maximum value / minimum value for each constant period is obtained from the internal information of the protective relay device sent from the protective relay device to the personal computer or the workstation at any time, and the electric quantity (current, voltage, Function to display the locus of impedance, etc.) on the screen of a personal computer or workstation. Therefore, it is possible to notify the operator of the changing load of the electric power system from a personal computer, a workstation, etc., and it is possible to prevent an erroneous operation or an erroneous operation due to the mismatch of the set values of the protection relay elements with respect to the changing electric power system load. .

Embodiment 8 FIG. The operation will be described based on the processing flowchart of the protection control device in FIG. (1) In step 902, the protection relay device sends the maximum / minimum value of the internal information of the protection relay device for each fixed period to a personal computer, a workstation, or the like using a communication line. (2) Step 903 compares the sent maximum / minimum value data with the set value of the relay element of the protective relay device.

(3) In Step 904, Step 90
If the result of comparison in 3 is not within a predetermined range, (4) in step 905, the optimum setting value and the current setting value of the protection relay element of the protection relay device are displayed on the screen of the personal computer, workstation, etc. Show the difference between and. (5) If it is within the range, the process directly goes to step 906.

Similar to the conditional expressions (7) and (8) of the fourth embodiment, the comparison judgment in step 904 is as follows: | maximum value−settling value | ≧ k1 | minimum value−settling value | ≧ k2 (normally k1 = The comparison is judged in k2). Further, as described in the fourth embodiment, the comparison may be determined by the ratio.

As described above, the maximum value / minimum value of the internal information of the protective relay device for every fixed period is sent to the remote computer or workstation to protect it on the screen of the personal computer or workstation. It functions to compare and judge the optimum setting value of the protection relay element of the relay device and the current setting value and display it. Therefore, it is possible to prevent malfunction or malfunction due to mismatch of the set values of the protection relay elements with respect to the changing load of the power system.

Embodiment 9 FIG. Although this embodiment has the same processing content as that of the eighth embodiment, in the eighth embodiment, there is a function of deriving the maximum value / minimum value for each fixed period in the protective relay device. Mode 9 is a case where there is no function for deriving the maximum value / minimum value for each fixed period in the protective relay device, and that function is performed on the computer side.

The operation will be described with reference to the process flow chart of the protection control device of FIG. (1) In step 1002, the data of the internal information of the protective relay device is transmitted from the protective relay device at any time using the communication line,
Send to a personal computer or workstation. (2) In step 1003, the maximum value / minimum value for each fixed period is obtained from the transmitted data.

(3) In step 1004, step 1
The maximum value / minimum value data obtained in 003 is compared with the set value of the relay element of the protective relay device. (4) In step 1005, when the result of comparison in step 1004 is not within a predetermined range,

(5) In step 1006, the optimum value of the settling value of the protective relay element of the protective relay device and the difference between the settling value and the current settling value are displayed on the screen of a personal computer, a workstation or the like. (6) If it is within the range, the process directly goes to step 1007.

As described above, the maximum value / minimum value for each fixed period is obtained from the internal information of the protective relay device sent from the protective relay device to the personal computer or workstation at any time, and the screen of the personal computer or workstation is displayed. It functions to display the optimum value of the set value of the protective relay element of the protective relay on the top. Therefore, it is possible to prevent malfunction or malfunction due to mismatch of the set values of the protection relay elements with respect to the changing load of the power system.

Tenth Embodiment The operation will be described based on the processing flowchart of the protection control device in FIG. (1) In step 1102, a system diagram is displayed from the system information on the screen of a personal computer, a workstation or the like.

(2) In step 1103, the protection relay device whose state is to be confirmed is selected from the screen. (3) In step 1104, the screen is divided so that the screen displays the status of the protective relay separately from the system diagram. FIG. 13 is a display example of the screen. When a desired protective relay device is designated in the system diagram on the left side, internal information such as set values, voltages, and currents is displayed in a list form on the right side.

(4) In step 1105, if there is another protective relay device whose state is to be confirmed, (5) the process proceeds to step 1103, and (6) If there is no protective relay device whose state is to be confirmed, ,
Step 1106 is reached.

As described above, on the screen of a personal computer, a workstation, etc., the screen of the system diagram and the current state of the set value etc. of one or more protective relay devices selected in this system diagram are displayed. The screen displayed in list form and the screen are divided like a multi-window, and the function is such that the status of the protection relays selected can be viewed at once. Therefore,
It is possible to compare the status of multiple protective relays at once.

Embodiment 11 FIG. The operation will be described based on the process flowchart of the protection control device in FIG. (1) In step 1202, a system diagram is displayed on the screen of a personal computer, a workstation, or the like.

(2) In step 1203, from the screen,
Select the protective relay for which you want to set the protective relay element settings. (3) In step 1204, the settling value of the protection relay element selected in step 1203 is set. The setting screen is
For example, as shown in FIG. 15, a column for displaying the current settling value,
Make the screen so that it can be compared with the field where the set value to be set is input.

(4) In step 1205, when setting of the setting value of the protective relay element of the protective relay device on the screen is not completed, (5) go to step 1203, and (6) when completed, step 1206 Then, the set value of the protection relay element is determined, and the process proceeds to step 1207.

As described above, on the screen of a personal computer, a workstation, etc., the screen of the system diagram and the current state of the set value etc. for one or more protection relay devices selected in this system diagram Is displayed separately for each protective relay device, and the screen on which setting values can be set is divided and displayed as a multi-window, and multiple protective relay devices can be displayed on the same screen. It functions to allow setting of the setpoint of the protective relay element. Therefore, it is possible to prevent settling value setting errors and the like that occur when setting while taking timely coordination with multiple devices (checking that the protective relay with a high voltage class is set to operate quickly). it can.

Twelfth Embodiment The operation will be described based on the processing flowchart of the protection control device in FIG. (1) In step 1302, it is selected whether to change or newly set the setting value of the protection relay element of the protection relay device through the communication line. (2) In step 1303, a systematic diagram is displayed on the screen of a personal computer, a workstation or the like.

(3) In step 1304, the screen of the system diagram and the set value of the protective relay element of the protective relay device of one device or a plurality of devices displayed in this system diagram are displayed on the screen of the personal computer or workstation. Display the screen for changing or setting a new value, and change the setting value or make a new setting. The settling value column and the change or new setting column are displayed in a list format as shown in FIGS. 13 and 15.

(4) When the setting is completed, step 130
At 5, the settling value data is sent out via the communication line to change the setting value of the protective relay device. (5) If the setting value of the protection relay element of the protection relay device is not changed or newly set in step 1302, the process proceeds to step 1306.

As described above, a protective relay device is selected on the system diagram displayed on the screen of a personal computer, a workstation or the like, and the set values of the protective relay elements of a plurality of protective relay devices are changed or new. Since the setting is made, it is possible to set a plurality of protective relay devices on the screen at one time, and it is possible to shorten the time.

[0082]

【The invention's effect】

(1) As described above, according to the first and second aspects of the invention, in order to judge whether the setting of the protective relay device is good or bad in a personal computer, a workstation, etc. This has an effect of making it possible to easily grasp the state of the protective relay device.

(2) Further, according to the third invention, from the system information input to a personal computer, a workstation or the like,
The optimum setting value of the protective relay element of the protective relay device is calculated, and the result is sent to the protective relay device installed in the electric facility through the communication line to automatically set the set value. This has the effect of preventing human error that occurs when setting the set value of each protection relay element of the electric device.

(3) According to the fourth to seventh inventions,
In order to inform the operator of the changing load of the electric power system from a personal computer, a workstation or the like, it is possible to prevent malfunctions or malfunctions due to the mismatch of the set values of the protection relay elements.

(4) According to the eighth aspect of the invention, a plurality of PCs or workstations can be set at once to set the settling values of the protective relay elements of the protective relay of a distant electrical facility through a communication line. This has the effect of preventing a setting value setting error or the like that occurs when setting while coordinating the time of the device.

(5) According to the ninth aspect of the invention, the screen of a personal computer or a workstation is divided into multiple screens such as a multi-window so that a plurality of devices can be set on the screen. By allowing the device to be set at one time, it has the effect of shortening the time.

[Brief description of drawings]

FIG. 1 is a block diagram showing a configuration of a protection control device showing an embodiment according to a first embodiment of the present invention.

FIG. 2 is a flowchart showing processing contents according to the first embodiment of the present invention.

FIG. 3 is a flowchart showing processing contents according to the second embodiment of the present invention.

FIG. 4 is a flowchart showing processing contents according to Embodiment 3 of the present invention.

FIG. 5 is a flowchart showing processing contents according to Embodiment 4 of the present invention.

FIG. 6 is a flowchart showing the processing contents according to the fifth embodiment of the present invention.

FIG. 7 is a flowchart showing the processing contents according to the sixth embodiment of the present invention.

FIG. 8 is a diagram of a locus display screen according to a sixth embodiment of the present invention.

FIG. 9 is a flowchart showing the processing contents according to the seventh embodiment of the present invention.

FIG. 10 is a flowchart showing the processing contents according to the eighth embodiment of the present invention.

FIG. 11 is a flowchart showing the processing contents according to the ninth embodiment of the present invention.

FIG. 12 is a flowchart showing the processing contents according to the tenth embodiment of the present invention.

FIG. 13 is a diagram showing a split display screen according to a tenth embodiment of the present invention.

FIG. 14 is a flowchart showing the processing contents according to the eleventh embodiment of the present invention.

FIG. 15 is a diagram showing a display screen for setting values and the like according to an eleventh embodiment of the present invention.

FIG. 16 is a flowchart showing the processing contents according to the twelfth embodiment of the present invention.

FIG. 17 is a block diagram showing a configuration of a conventional protective relay device.

[Explanation of symbols]

101, 102 protective relay device, 103, 104 I /
F part, 105-107 transceiver, 108 transmission device, 109 communication line, 110 transmission device, computer such as personal computer or workstation (protection control device), 111-1 internal information, 111-2 system information, 111-3 state Judgment part, 111-4 display control part, 111-5 screen.

Claims (9)

[Claims] 1. A protection control device having a calculation function and managing a protection relay device connected to a power system, wherein graphic information of a single line connection diagram of the power system, connection state information, and a single line connection diagram are configured. A simulation is performed using system information such as the impedance of the power transmission line, the distance of the power transmission line, and the capacity of the transformer, and the simulation results and the internal settings such as various set values, currents, voltages, and impedances transmitted from the protective relay device. A protection control device, characterized in that the quality of a settling value, a protection characteristic or the like is judged according to a comparison with information. 2. In a protection control device having a calculation function and managing a protection relay device connected to a power system, an optimum settling value is calculated from system information of the power system, and the optimum value and A protection control device, characterized in that a difference or ratio with a settling value currently set in the protection relay device is obtained, and whether the settling value currently set is good or bad is determined according to the obtained result. 3. In a protection control device having a calculation function and managing a protection relay device connected to a power system, an optimum settling value is calculated from system information of the power system, and the optimum value is calculated as described above. A protection control device, which is set as a set value of a protection relay device. 4. In a protection control device having a calculation function and managing a protection relay device connected to a power system, the maximum value of the internal information for every certain period from the internal information transmitted from the protection relay device. / A minimum value is derived, the maximum value / minimum value is compared with the set value of the protective relay device, and an alarm is issued according to the comparison result. 5. In a protection control device having a calculation function and managing a protection relay device connected to an electric power system, a maximum value of internal information for every certain period from internal information transmitted from the protection relay device. / Minimum value is derived, and the relationship between the maximum value / minimum value, the locus of the electric quantity from the internal information, and the set value of the protective relay device can be displayed on the screen for comparison. A protective relay device characterized in that 6. A protection control device having a calculation function, which manages a protection relay device connected to a power system, calculates an optimum settling value from system information of the power system, and protects the protection relay device. The maximum value / minimum value of the internal information at constant intervals is derived from the internal information transmitted from the device, and the difference or ratio between the maximum value / minimum value and the set value of the protective relay device is calculated, A protection control device displaying the difference or the ratio together with the maximum value / minimum value. 7. The method according to any one of claims 4 to 6,
When the protective relay device has a function of transmitting the maximum value / minimum value of the internal information for each fixed cycle, the protective relay device is used instead of deriving the maximum value / minimum value of the internal information for each fixed cycle from the internal information. The protection control device is characterized in that the maximum value / minimum value of the internal information sent from the device for each fixed cycle is used. 8. The method according to claim 1, wherein
A screen display means is provided to display a system diagram screen and a screen in which internal information such as set values, maximum / minimum values, and optimum values of a plurality of protective relay devices connected to this system diagram are listed. A protection control device characterized by being divided and displayed. 9. The method according to claim 1, wherein
A screen display means is provided, and a screen of a system diagram and a screen in which a settling value of a plurality of protection relay devices connected to the system diagram can be set are displayed separately. .