JP2004336864A - Power system protective controller - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To offer a power system protective controller which is downsized, while securing the independence of a protective relay means and a supervision, and a control system and securing the overall reliability. <P>SOLUTION: A protective relay device is constituted as a protective relay unit 112, consisting of a protective relay unit interface 116 and a protective relay means 117 supplied with power from an exclusive power source. A monitoring controller is constituted as a monitoring control unit 113, consisting of a monitoring control unit interface 118 and a monitoring control means 119 supplied with power from an exclusive power source. The protective relay unit 112 and the monitoring control unit 113 are mounted integrally within a power system protective controller 111, and are connected directly by an interface. Indicators, corresponding to the protective relay unit 112 and the monitoring control unit 113 and operation means, such as a variety of switches, are arranged together, being sorted into a protection system and a control system, on the panel face of a power system protective controller 111. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a power system protection control device including a protection relay unit and a supervisory control unit for power system equipment, and more particularly to means for achieving both reliability and miniaturization.
[0002]
[Prior art]
Conventionally, a protective relay that reduces damage and minimizes the effects of accidents or abnormal conditions on transformers, buses, transmission lines, etc. in power systems, and distributes power by controlling voltage and reactive power The monitoring control device that monitors and controls devices such as a switchgear is an independent device.
[0003]
Such an independent configuration not only increases the cost but also makes it difficult to install the protection relay device in a narrow site. A power system protection control device has been proposed in which a human interface and a network interface of control means are shared and miniaturized (for example, see Patent Document 1).
[0004]
[Patent Document 1]
[0005]
JP-A-2002-152972 (pages 4 to 5, FIG. 1)
[Problems to be solved by the invention]
Since the conventional protection relay device and the control device were independent of each other, a large installation space was required and the cost was high.
[0006]
On the other hand, when the human interface and the network interface of the protection relay means and the monitoring control means are shared for the purpose of miniaturization as in Patent Document 1, when the interface fails, both the protection system and the control system are down. And the reliability decreases.
[0007]
In addition, if one of the protection relay means and the monitoring control means breaks down, it is necessary to add various other countermeasures in order to have a configuration that does not affect the other.
[0008]
SUMMARY OF THE INVENTION It is an object of the present invention to provide a power system protection control device that is reduced in size while ensuring the independence and overall reliability of the protection relay means and the monitoring control means.
[0009]
[Means for Solving the Problems]
In order to achieve the above object, the present invention provides a protection relay device for protecting a power system such as a transmission line, a bus, a device, and a distribution line, and a device such as a switching device for controlling voltage and reactive power and distributing power. In a power system protection control device including a monitoring control device for monitoring and controlling, the protection relay device is configured as a protection relay unit including a protection relay unit interface and a protection relay unit supplied with power from a dedicated power supply. Wherein the monitoring and control device is configured as a monitoring and control unit including a monitoring and control unit interface and monitoring and control means supplied with power from a dedicated power supply, and the protection relay unit and the monitoring and control unit are integrated into the power system protection and control device. And are directly connected by an insulated interface, corresponding to the protective relay unit and the supervisory control unit respectively. And operation means such as 示器 and switches are proposed power system protective control system which is arranged together respectively divided into a protection and control line in the panel surface of the electric power system protective control system.
[0010]
The protection relay unit and the monitoring and control unit are stacked one on top of the other, arranged one behind the other, or arranged left and right.
[0011]
In any of the power system protection control devices, a local PC that is connected to the interface of the protection relay unit and the monitoring control unit via a network and manages information on the power system equipment can be provided.
[0012]
It is also possible to equip the control station of the power system with a remote PC that is externally connected to the interface of the protection relay unit and the monitoring control unit via a network and manages information on the power system equipment.
[0013]
In the present invention, the protection relay device is configured as a protection relay unit including a protection relay unit interface and protection relay means supplied with power from a dedicated power source, and the monitoring control device is configured to include the monitoring control unit interface and the dedicated power source. Since it is configured as a monitoring and control unit consisting of monitoring and control means fed from the power supply, the protection relay device and the monitoring and control device are independent even if integrated and mounted, and failure of either unit Does not affect the other unit.
[0014]
As a result, the protection relay unit and the monitoring and control unit, which were conventionally independent units, were integrated and mounted, resulting in a significant reduction in installation space and cost.
[0015]
Further, since the protection relay unit and the monitoring control unit are completely independent of each other, simultaneous stoppage of the protection relay unit and the monitoring control unit due to failure of a single component can be prevented.
[0016]
More specifically, the mounting space was reduced by using a board-type input converter. As a result of using a small power supply, it was large enough to fit in a rack. Since the speed of the CPU substrate has been increased, the processing amount per unit time has increased even if the number of substrates is reduced. The front case plate of the protective relay unit is a movable door, and an auxiliary relay is placed on the back of the door to improve mounting efficiency.
[0017]
BEST MODE FOR CARRYING OUT THE INVENTION
Next, an embodiment of a power system protection control device according to the present invention will be described with reference to FIGS.
[0018]
FIG. 1 is a diagram showing the overall configuration of a power system protection control system including a power system protection control device according to the present invention.
[0019]
The digital protection control device 111 according to the present invention is installed in a substation 121. The local PC 114 manages information on the protection relay unit and the monitoring control unit in the digital protection control device 111. These pieces of information in the digital protection controller 111 are transmitted / received by, for example, the TCP / IP protocol 123, and can be confirmed from the remote PC 120 disposed in the control center 122 via the router 124, the modem 125, the optical cable, and the like. .
[0020]
Embodiment 1
FIG. 2 is a block diagram illustrating an internal configuration of the power system protection control device 111. The power system protection control device 111 includes a protection relay unit 112 and a monitoring control unit 113.
[0021]
The local PC 114 is, for example, a PC having a general-purpose browser, and acquires data from the protection relay unit 112 and the monitoring control unit 113 via the network 115. The local PC 114 manages the power system by executing protection of the power system and devices that are components of the power system, and control of display, analysis, evaluation, and operation of control information.
[0022]
The protection relay unit 112 and the monitoring control unit 113 are independent of each other, and include a power supply and a protection relay unit interface 116, a protection relay unit 117, a monitoring control unit interface 118, and a monitoring control unit 119 (not shown). Therefore, it is completely separated from input to output. Therefore, even if a failure occurs in the monitoring control unit, it does not affect the protection relay unit. Conversely, even if a failure occurs in the protection relay unit, it does not affect the monitoring and control unit.
[0023]
Further, even if a problem occurs in the interface 118 of the monitoring and control unit 113 and the management on the monitoring and control unit side becomes impossible in the local PC 114, the interface 116 of the protection relay unit 112 is provided separately, and Management of the protection relay unit does not become impossible at the same time.
[0024]
Conversely, even if a problem occurs in the interface 116 of the protection relay unit 112 and it becomes impossible to manage the protection relay unit side in the local PC 114, the interface 118 of the monitoring control unit 113 is provided separately. Control of the supervisory control unit of the system is not impossible at the same time.
[0025]
As described above, in the present invention, the protection relay unit and the monitoring control unit are apparently integrally mounted in the power system protection control device. In order not to affect the unit, the configuration is independent including the power supply and the interface unit.
[0026]
FIG. 3 is a perspective view showing a two-tier configuration in which the monitoring control unit 113 is arranged on the protection relay unit 112. In this configuration, since the protection relay unit 112 is disposed at the lower stage, inspection and maintenance of the protection relay unit 112 are easy, and the operation of the interface 116 of the protection relay unit 112 is easy.
[0027]
Embodiment 2
FIG. 4 is a perspective view showing a two-tier configuration in which the protective relay unit 112 is arranged on the monitoring control unit 113. In this configuration, since the monitoring control unit 113 is arranged at the lower stage, inspection and maintenance of the monitoring control unit 113 are easy, and the operation of the interface 118 of the monitoring control unit 113 is easy.
[0028]
Embodiment 3
FIG. 5 is a perspective view showing a configuration in which the monitoring control unit 113 is disposed on the front surface and the protection relay unit 112 is disposed on the rear surface.
[0029]
Inspection and maintenance of the control device in the monitoring and control unit 113 and the protection relay device in the protection relay unit 112 are usually performed by opening the back of each device. It is advantageous to arrange a unit with a lot of wiring on the front of the device and a unit with a large number of inspections and maintenances on the back of the device.
[0030]
The third embodiment is advantageous when the number of wires of the monitoring control unit 113 is large and the number of times of inspection and maintenance of the protection relay unit 112 is required.
[0031]
Embodiment 4
FIG. 6 is a perspective view showing a configuration in which the protection relay unit 112 is disposed on the front surface and the monitoring control unit 113 is disposed on the rear surface.
[0032]
The fourth embodiment is advantageous when the number of wires of the protection relay unit 112 is large and the number of times of inspection and maintenance of the monitoring control unit 113 is required.
[0033]
Embodiment 5
FIG. 7 is a perspective view showing a configuration in which the monitoring control unit 113 is disposed on the left and the protective relay unit 112 is disposed on the right when viewed from the front.
[0034]
The fifth embodiment is advantageous when both the monitoring control unit 113 and the protection relay unit 112 require inspection and maintenance, and when the operation of the interface is required.
[0035]
Embodiment 6
FIG. 8 is a perspective view showing a configuration in which the protection relay unit 112 is disposed on the left and the monitoring control unit 113 is disposed on the right when viewed from the front.
[0036]
The sixth embodiment is advantageous when both the protection relay unit 112 and the monitoring control unit 113 require inspection and maintenance, and when the operation of the interface is required.
[0037]
Note that the protection relay unit 112 and the monitoring control unit 113 of the first to sixth embodiments are directly connected inside the power system protection control device by an insulated interface.
[0038]
In addition, as shown in the lower part of FIGS. 3 to 8, the operation means such as the display and the switches corresponding to the protection relay unit 112 and the monitoring control unit 113 of the first to sixth embodiments prevent erroneous operation. For this purpose, the protection system is divided into a protection system and a control system.
[0039]
【The invention's effect】
According to the present invention, there is provided a power system protection control device that can be installed as an integrated device of a protection relay unit and a monitoring control unit, which have been conventionally independent, and can greatly reduce installation space and cost. can get.
[0040]
On the other hand, since the protection relay unit and the monitoring control unit are completely independent inside the power system protection controller, simultaneous stoppage of the function of the protection relay unit and the monitoring control unit due to failure of a single component is prevented. Can be prevented and reliability is increased.
[0041]
Furthermore, an optimum unit arrangement can be selected from various unit arrangements according to the configuration of the protection / control object and the protection / control purpose.
[Brief description of the drawings]
FIG. 1 is a diagram showing an overall configuration of a power system protection control system including a power system protection control device according to the present invention.
FIG. 2 is a block diagram showing an internal configuration of a power system protection control device 111.
FIG. 3 is a perspective view showing a two-tier configuration in which a monitoring control unit 113 is arranged on a protection relay unit 112;
FIG. 4 is a perspective view showing a two-tier configuration in which a protective relay unit 112 is arranged on a monitoring control unit 113;
FIG. 5 is a perspective view showing a configuration in which a monitoring control unit 113 is disposed on a front surface and a protection relay unit 112 is disposed on a rear surface.
FIG. 6 is a perspective view showing a configuration in which a protective relay unit 112 is arranged on the front side and a monitoring control unit 113 is arranged on the back side.
FIG. 7 is a perspective view showing a configuration in which the monitoring control unit 113 is disposed on the left and the protection relay unit 112 is disposed on the right when viewed from the front.
FIG. 8 is a perspective view showing a configuration in which a protection relay unit 112 is disposed on the left and a monitoring control unit 113 is disposed on the right when viewed from the front.
[Explanation of symbols]
111 Power system protection control device 112 Protection relay unit 113 Monitoring and control unit 114 Local PC with general-purpose browser
115 network 116 protection relay unit interface 117 protection relay unit 118 monitoring control unit interface 119 monitoring control unit 120 remote PC
121 Substation 122 Control station 123 TCP / IP
124 router 125 modem

Claims (6)

A power system including a protective relay that protects power systems such as transmission lines, buses, equipment, and distribution lines, and a monitoring control device that monitors and controls devices such as switchgear that controls voltage and reactive power and distributes power. In the protection control device,
The protection relay device is configured as a protection relay unit including a protection relay unit interface and a protection relay unit supplied with power from a dedicated power supply,
The monitoring control device is configured as a monitoring control unit including a monitoring control unit interface and monitoring control means supplied with power from a dedicated power supply,
The protection relay unit and the monitoring control unit are integrally mounted in the power system protection control device, and are directly connected by an insulated interface,
Indicators and operating means such as switches respectively corresponding to the protection relay unit and the monitoring control unit are divided into a protection system and a control system on a panel surface of the power system protection control device, and are collectively arranged. A power system protection control device, characterized in that: The power system protection control device according to claim 1,
The power system protection control device, wherein the protection relay unit and the monitoring control unit are vertically stacked. The power system protection control device according to claim 1,
The power system protection control device, wherein the protection relay unit and the monitoring control unit are arranged in front and behind. The power system protection control device according to claim 1,
A power system protection control device, wherein the protection relay unit and the monitoring control unit are arranged on the left and right. The power system protection control device according to any one of claims 1 to 4,
A power system protection control device, comprising: a local PC that is connected to interfaces of the protection relay unit and the monitoring control unit via the network, and manages information on power system equipment. The power system protection control device according to any one of claims 1 to 5,
A power system control, comprising: a remote PC connected to an interface of the protection relay unit and the monitoring control unit from the outside via the network and managing information of power system equipment at a control center of the power system. Control device.

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