JP2000050531A - Display method for power system information - Google Patents

Abstract

PROBLEM TO BE SOLVED: To display physical quantities such as node voltages, effective and reactive powers, etc., along with a system configuration, to obtain them intuitively and rapidly by three-dimensional CG. SOLUTION: Inside a space 11 of a power system displayed into three dimensions, a voltage at each node or its deviation from a node voltage reference is displayed by a column 13 having an axial height which corresponds to this magnitude, and this column 13 is arranged in the upward or downward direction from a node 12. Moreover, an effective or reactive power at the node 12 is displayed by a sphere 14 having a diameter corresponding to this magnitude, and this sphere 14 is arranged above or below the node 12. Others including active and reactive power flow of a branch, a facility capacity, etc., are displayed into three dimensions using solids.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a computer system for monitoring and controlling a power system in a central power supply command center, a branch power supply command center, a system control station, and the like of a power system. The present invention relates to a method for displaying power system information for three-dimensionally displaying certain various physical quantities and the like.

[0002]

2. Description of the Related Art Conventionally, display of a power system state has been performed for various purposes such as display in a system monitoring and control system and display of calculation results in power system calculation. For this type of information display, a two-dimensional power system diagram in which power system components are displayed on a CRT display device by lines or the like and combined with each other is usually used. According to this power system diagram, the configuration of the power system, the connection state of various facilities, and the like can be quickly grasped, but on the other hand, it is not suitable for grasping the power flow, voltage, and the like accompanying the power system.

The display of physical quantities in the current power system state display is roughly divided into the following two methods. (1) A method of writing character (numerical value) information on a power system diagram (2) A dedicated screen for each physical quantity is provided on a screen separate from the power system diagram, and a numerical display or a graphic display such as a graph is performed. Method

[0004] Recently, a method of expressing various physical quantities by three-dimensional display by a CG (computer graphics) method has begun to be studied. These methods are mainly for the purpose of visualizing simulation results, and are usually completely different from the representation method of an electric power system diagram that operators are accustomed to. Therefore, it is impossible to grasp the situation quickly.

[0005]

As described above, in the prior art, it is difficult to quickly grasp the state of the power system because it is displayed by numerical values or on a screen separate from the power system diagram.
In the numerical display, a precise value can be grasped as a characteristic of numerical information or character information, but it is not suitable for intuitive grasp. Further, in the display on another screen, it is not possible to grasp the physical quantity simultaneously with the system configuration. In practice, the above two methods are combined in a display device in a system monitoring and control system, but the use of different elements for the display of the power system diagram and the display of the physical quantity hinders quick status grasp. ing.

In a power system, it is very useful for beginners to display a numerical calculation result if a display method that can help understanding of the calculation result can be realized. In addition, in the system monitoring and control system, it is very important to quickly grasp the state of the system in all aspects of system operation reliability, safety and economy. Such system operation,
Considering the level of automation of system control (many operators intervene except for device control), the importance of quickly grasping the state of the system is clear.

Accordingly, an object of the present invention is to provide a method of displaying power system information that can simultaneously and intuitively grasp the state of the power system by simultaneously expressing the power system configuration and various physical quantities.

[0008]

According to a first aspect of the present invention, there is provided a method of displaying a power system in a three-dimensional space, wherein a deviation from a node voltage or a node voltage reference value is indicated by a value above a node. Alternatively, it is visually displayed using a cylindrical body arranged below.

The display method is as follows. (1) Node voltage display The magnitude of the node voltage is represented by the height of the cylinder in the axial direction.
It is arranged on a node in a three-dimensional system space. This allows
By comparing the heights of the cylinders arranged at the respective nodes with respect to the reference plane in the three-dimensional space, it is possible to grasp the node voltage distribution of the whole or a part of the power system.

(2) Node voltage deviation display Node voltage deviation (deviation between node voltage and system reference voltage)
Is represented by the height of the cylinder in the axial direction, and is arranged on a node in the three-dimensional system space. If the deviation is positive, place the cylinder upward at a node in the system space,
If the deviation is on the negative side, it is placed downward. Thereby, by seeing whether the cylinder arranged at each node with respect to the reference plane in the three-dimensional space is above or below, and by observing the height of the cylinder, the whole or a part of the power system can be seen. Enables grasp of node voltage distribution.

Next, in the invention according to claim 2, as a display method in a three-dimensional system space, the node active power or the node reactive power is visually displayed using a sphere arranged above or below the node. .

The display method is as follows. (1) Node active power display The size of the node active power is indicated by the diameter of the sphere,
It is arranged on a node in the dimensional system space. As an arrangement method, the power generation is arranged above the node, and the load is arranged below the node. Thereby, it is easy to grasp the distribution of the generators and loads in the whole or a part of the power system and to grasp their sizes.

(2) Node reactive power display The magnitude of the node reactive power is indicated by the diameter of a sphere,
It is arranged on a node in the dimensional system space. As an arrangement method, the outflow from the node is arranged above the node, and the inflow to the node is arranged below the node. Thereby, it is easy to grasp the distribution of the inflow and outflow of the reactive power of the whole or a part of the power system and to grasp the magnitude thereof.

According to the third aspect of the present invention, as a display method in a three-dimensional system space, a branch active power flow or a branch reactive power flow is visually displayed using a cylindrical body arranged in the system space.

The display method is as follows. (1) Branch active power flow display The magnitude of the branch active power flow is indicated by the diameter of a cylinder, and is arranged in a three-dimensional system space. This makes it possible to grasp the distribution and size of the active power flow of each branch in the whole or a part of the power system.

(2) Display of branch reactive power flow The magnitude of the branch reactive power flow is indicated by the diameter of a cylindrical body, and arranged in a three-dimensional system space. This makes it possible to grasp the distribution and magnitude of the reactive power flow of each branch in the whole or a part of the power system.

According to the fourth aspect of the present invention, as a display method in the three-dimensional system space, the equipment capacity of the branch, the operation limit value, the available supply capacity, and the like are visually displayed using a cylindrical body arranged in the system space.

The display method is as follows. (1) Display of the installed capacity of the branch, the operation limit value, the available supply capacity, etc. The installed capacity of the branch, the operation limit value, the available supply capacity, etc. are displayed by the diameter of the cylindrical body, and represent the branch active power flow of the invention of claim 3. It is represented by a cylinder arranged concentrically outside the cylinder. This makes it possible to grasp the relationship between the active power flow of each branch and the installed capacity, operation limit value or surplus capacity.

[0019]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 shows a display example according to the embodiment of the invention described in claims 1 and 2. This embodiment is an example in which a node voltage, a node active power, and a node reactive power are displayed on a display screen of a CRT display device. In particular, here, each of the above physical quantities is displayed only for the nodes.

In FIG. 1, reference numeral 10 denotes a display screen of the CRT display device, and reference numeral 11 denotes a three-dimensionally displayed power system space. Reference numeral 12 denotes a node represented by a rectangular parallelepiped (substantially rectangular rod shape). The node voltage at the node 12 is indicated by a column 13, and the height in the axial direction indicates the magnitude of the voltage. This makes it easy to compare the node voltage distribution and the magnitude of the entire power system and each node.
Further, in the embodiment, the node voltage itself is indicated by the cylindrical body 13. However, the node voltage deviation (deviation from the node voltage reference value) may be represented by a cylindrical body. Can immediately grasp how much the voltage of the node is higher than the node voltage reference value. Also in expressing the node voltage deviation, the axial height of the cylindrical body is made to correspond to the size.

Further, below the cylindrical body 13 in FIG. 1, a sphere 1 in which the magnitude of the active power or the reactive power corresponds to the diameter.
4 are arranged. When the sphere 14 is disposed below the column 13 in this manner, a load is expressed as active power, and an inflow to the node 12 is expressed as reactive power.
When the sphere 14 is arranged above the column 13, the active power indicates a generator (power generation), and the reactive power indicates outflow from the node 12. According to this embodiment, it is possible to intuitively grasp the distribution of generators and loads in the entire power system and each node, the distribution of inflow and outflow of reactive power, and the magnitudes thereof.

FIG. 4 is a block diagram of an electronic computer system used in each embodiment of the present invention. In the figure, 31 is a target power system, 32 is a power system monitoring and control computer to which measurement data of the power system 31 is given, 3
Reference numeral 3 denotes off-line data relating to the system configuration and equipment, 34 denotes online data based on measurement data, 35 denotes a power system simulation program for performing power flow calculation and the like, 36 denotes a power system information visualization system which is a main component of the present invention, 37
Is a system information database in which various data serving as the basis of the system information display are stored, and 38 is a system node (bus, generator, load, etc.), a branch (transmission line, transformer, etc.), and a connection state thereof. System configuration data, 39 is equipment data such as operation limit values required for system operation, equipment capacity of each equipment, and 40 is voltage, active power, reactive power of each node,
Physical quantity data such as a phase angle and active power flow in a branch, and 41 is a predetermined color, shape, and size (including its maximum value and minimum value) for three-dimensionally displaying nodes, voltages, active power, reactive power, and the like. , Given a cylinder, sphere,
A three-dimensional model database such as a rectangular parallelepiped, a reference numeral 42 denotes a three-dimensional display engine for executing a three-dimensional display as shown in FIG. 1 based on the various data in the database 41 and the system information database 37, and a reference numeral 43 denotes a viewpoint movement and enlargement. 3D display control function for performing display control such as reduction
It is a T display device.

The three-dimensional display engine 42 includes a physical quantity normalization module, a system configuration display module, a physical quantity display module, and the like. This engine 42
The operation of each module is shown below.

(1) Physical quantity normalization module The equipment data and physical quantity data taken in the system are set so that the preset maximum value is 1 and the minimum value is 0 or -1.
Normalize so that For example, when normalizing the physical quantity data in the range of the maximum value: 1 to the minimum value: 0, it is calculated by a general formula below. Normalized physical quantity = (physical quantity-minimum value) / (maximum value-minimum value)

(2) System Configuration Display Module The system configuration data 38 representing the connection state and configuration of the equipment taken into the system is displayed in a three-dimensional graphic color,
Using the three-dimensional model database 41 indicating the shape, size, etc., a graphic display representing nodes and branches is performed.

(3) Physical quantity display module Using the physical quantity data normalized by the physical quantity normalization module of (1) and the three-dimensional model database 41, correspondence of the system configuration displayed by the system configuration display module of (2) Display physical quantity data on the node and branch to be executed.

Next, FIG. 2 shows a display example according to the embodiment of the invention described in claims 3 and 4. This embodiment is an example in which the active power flow and the reactive power flow of the branch, and the installed capacity of the branch are displayed on the CRT display device 44. In particular, here, the physical quantities described above are displayed only for the branches.

In the figure, reference numeral 15 denotes a horizontally disposed cylindrical body showing the branch active power flow, which is displayed in the space 11 of the power system as in FIG. Further, at one end of the columnar body 15, a conical body 16 indicating a tidal flow direction is added. Note that the magnitude of the active power flow is represented by the diameter of the cylindrical body 15.

Further, a cylindrical body 1 indicating the installed capacity of the branch.
7 is concentrically displayed on the outside of the cylindrical body 15, and the magnitude of the installed capacity is also represented by the diameter of the cylindrical body 17. Here, instead of the branch facility capacity, an operation limit value or facility supply capacity may be displayed. Further, the reactive power flow may be displayed instead of the active power flow.

According to the present embodiment, it is easy to intuitively grasp the active power flow, the reactive power flow, the installed capacity, the operation limit value, and the like of each branch in the entire power system or a part thereof.

FIG. 3 shows an embodiment of the present invention in which claims 1 to 4 are integrated, and is an example in which the present invention is applied to a three-node four-branch system. That is, node 12
The voltages or voltage deviations at A, 12B, 12C are determined by the cylindrical bodies 13A, 13B, 13C having a predetermined axial height.
, And the active power or the reactive power is displayed by the spheres 14A, 14B, 14C having a predetermined diameter. Further, the active power flow or the reactive power flow and the installed capacity in the branch between the nodes are determined by the cylindrical body 15 having a predetermined diameter.
H, 15I, 15J, and 15K and the cylindrical bodies 17H, 17I, 17J, and 17K concentrically arranged outside thereof. The direction of the tide is cylindrical 15H, 15
I, 15J, 15K are indicated by cones added to them.

In this way, when the inventions of claims 1 to 4 are combined, in addition to the configuration of the power system, the voltage, voltage deviation, active power, reactive power, these power flows, equipment capacity, and operation limit at each node and branch. A physical quantity such as a value and a surplus supply capacity can be displayed three-dimensionally at the same time. At a glance at the display screen 10, it is possible to easily grasp the magnitude and magnitude relation of each physical quantity in the entire system or a part thereof.

[0033]

As described above, the first aspect of the present invention relates to a method for displaying a node voltage. In the current display method, the voltage is numerically displayed near the bus (node) of the power system diagram (for example, “77.3 kV”). When a voltage monitoring screen is provided, a list or graph of bus voltages in the target system is displayed in addition to the method described above. According to such a conventional method, it is difficult to intuitively grasp the distribution and transition tendency of the node voltage, but according to the present invention, it is possible to grasp these quickly and intuitively.

The invention according to claim 2 relates to active power and reactive power of a node. In the current display method, the node power is numerically displayed near the bus (node) as described above, or a list is displayed using a dedicated screen. In such a display method, it is necessary to take measures such as loading an arrow or a symbol indicating a generator in order to distinguish the power generation output from the load. In addition, if the system configuration is not sufficiently grasped, the entire distribution cannot be accurately grasped. In particular, it is difficult to distinguish inflow and outflow of the reactive power. In this regard, according to the present invention, it is possible to intuitively perform generation of active power, distinction of load, distinction of inflow / outflow of reactive power, and grasp of magnitude.

The third and fourth aspects of the present invention relate to a method for expressing active power flow and reactive power flow of a branch (transmission line, transformer). In the current display method, the branch active power flow is represented by the branch (transmission line,
(Transformer) or a list on a dedicated screen. With such a display method, it is impossible for an operator who is familiar with the system to grasp the necessary equipment capacity, the operation limit value, and the surplus supply capacity, particularly in system operation. Further, even if the user is familiar with the system, quick operation is difficult because switching between a plurality of screens is required. ADVANTAGE OF THE INVENTION According to this invention, a tidal current state, an equipment capacity, an operation limit, a surplus supply capacity, etc. can be grasped at once, and there is no need to rely on a skilled operator.

The above has been described for each claim, but the overall summary is as follows. That is, the features related to the method of expressing various physical quantities in the present invention are summarized in the following two points. (1) By displaying a qualitative image (high, low, large, small, etc.) of various physical quantities or considered by the operator in the system space on the CRT screen in three dimensions,
It is possible to intuitively grasp the system state. (2) Unlike the conventional display method, a means for expressing the configuration of the power system (conventionally, a power system diagram) and a means for expressing each physical quantity (conventionally, numerical display, graph display, and the like) are three-dimensional. By integrating by the expression method, the physical quantity can be visualized and added to the power system diagram, which has been conventionally used only as a means for expressing the system configuration, and the intuitive grasp of the system state has become possible.

[Brief description of the drawings]

FIG. 1 is a diagram showing a display example according to an embodiment of the invention described in claims 1 and 2;

FIG. 2 is a diagram showing a display example according to the embodiment of the invention described in claims 3 and 4;

FIG. 3 is a diagram showing a display example according to the embodiment of the invention described in claims 1 to 4;

FIG. 4 is a configuration diagram of a computer system used in each embodiment of the present invention.

[Explanation of symbols]

10 Display screen 11 Power system space 12, 12A, 12B, 12C Nodes 13, 15, 17, 13A, 13B, 13C, 15H,
15I, 15J, 15K, 17H, 17I, 17J, 1
7K cylinder 14, 14A, 14B, 14C sphere 16 cone 31 power system 32 power system monitoring and control computer 33 offline data 34 online data 35 power system simulation program 36 power system information visualization system 37 system information database 38 system configuration Data 39 Equipment data 40 Physical quantity data 41 3D model database 42 3D display engine 43 3D display control function 44 CRT display device

──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. ⁷ Identification symbol FI Theme coat ゛ (Reference) G06F 15/60 672Z F-term (Reference) 5B046 AA00 CA09 DA05 DA10 GA01 JA07 5C082 AA12 BA12 BA16 BA17 DA42 MM09 MM10 5G064 BA02 BA12 DA01 5H223 AA19 BB08 CC08 DD03 DD09 EE06 EE08 EE13 FF03 FF05

Claims (4)

[Claims] 1. A method for displaying power system information in which a configuration of a power system and a physical quantity of the power system are displayed on a screen of a display device by an electronic computer system, the voltage at each node in a three-dimensionally displayed space of the power system. Alternatively, the deviation from the node voltage reference value is displayed by a cylinder whose magnitude corresponds to the height in the axial direction, and these cylinders are arranged upward or downward from the node. How to display system information. 2. A method for displaying power system information in which a configuration of a power system and a physical quantity of the power system are displayed on a screen of a display device by an electronic computer system. A method for displaying power system information, wherein power or reactive power is displayed by spheres whose magnitudes correspond to diameters, and these spheres are arranged above or below the node. 3. A method for displaying power system information in which the configuration of a power system and the physical quantity of the power system are displayed on a screen of a display device by an electronic computer system, the active power of a branch in a three-dimensionally displayed space of the power system. A power system information display method, characterized by displaying a power flow or a reactive power flow by a columnar body whose magnitude corresponds to a diameter, and adding a power flow direction by a graphic. 4. The method for displaying power system information according to claim 3, wherein the installed capacity, the motion limit value, or the available supply capacity of the branch is displayed by another cylinder concentrically arranged outside the cylinder. A method for displaying power system information characterized by the following.