JPH0311170B2 - - Google Patents

Description

[Detailed description of the invention] The present invention relates to an automatic determination method for power outage equipment.

In recent years, power systems and equipment within the systems have become huge and complex. Therefore, if an accident occurs within the system, the power outage will spread over a wide range of areas. However, since there are healthy facilities in the power outage system, restoration operations are performed to retransmit power to the healthy facilities.

In order to perform this restoration operation smoothly, it is necessary to detect power outage equipment and to reliably and quickly detect power outage equipment (healthy equipment) that can retransmit power.

However, in the past, the detection method for power outage equipment was determined by humans, so it took time to detect power outage equipment.

This invention has been made in view of the above circumstances, and aims to provide an automatic judgment method for power outage equipment that automatically and quickly detects only healthy power outage equipment from a wide range of power outage equipment. .

An embodiment of the present invention will be described below with reference to the drawings. Fig. 1 is a system diagram explaining this invention. In Fig. 1, G ₁ and G ₂ are the first and second power plants, and B ₁
~B ₆ is the bus bar, CB ₁ ~ _{CB 8} is the bridge and disconnector, LS ₁ ~ _{LS 6}
is line switch, L ₁ ~ _{L 4} is power line, PT ₁ ~ PT ₄
is a transformer, and PW ₁ to _{PW 8} are display wire relays.
Note that F indicates the accident point and X indicates an open leak or disconnection.

FIG. 2 is a block diagram of an embodiment of this invention.
is an online information input section, and this input section 1 is connected to the display wire relays PW _{1 to 1} from the power system shown in Fig. 1.
The operation information of PW ₈ is input, and each of these pieces of information is input to the processing section 2 indicated by the dashed line in the figure. The processing section 2 includes a power outage equipment detection means 3 and a storage means 4 for storing the output of the detection means 3. 5
1 is a storage unit, and this storage unit 5 stores a cutoff trip order (described later) and equipment storage information. The former breaker trip order is, for example, ``PW <sub>1</sub> trips CB <sub>1</sub> ,'' ``PW ₃ trips CB 2,'' ``PW 2 trips CB <sub>3</sub> , CB 7, and CB 5,'' and ``PW ₂ trips CB ₃ , CB ₇ , and CB _5. '' pw ₄ trips CB ₄ , CB ₈ and CB ₆ .
This is information that determines in advance which CB to trip when the display line relay operates. In addition, the latter equipment information is, firstly, the breaker CB ₁
~ CB ₈ , line switch LS ₁ ~ _{LS 6} , etc. opening/closing information before the accident (for example, information that CB ₇ was open), 2nd
The equipment connection information of the operated CB (for example, CB ₁ is
Information such as being sandwiched between B ₁ and L ₁ ), Thirdly,
This information is information on work stoppage equipment and operation stoppage equipment among the CB connected equipment due to accidental operation, and this information is entered in advance by humans and stored. 6 is a display section that displays where the power outage equipment is located.

Next, the operation of the above embodiment will be explained.

Now, each piece of information is input from the online information input section 1 to each detection means 3. Then, the detection means 3
It detects the operation information of PW ₁ to PW ₈ .
When the operation information of PW ₁ to _{PW 8} is input to the detection means 3, the next information is restored from the storage section 5.

(b) Trip order information for the activated CB, (b) Equipment connection information for the activated CB, (c) Opening/closing information for the activated CB and LS before the accident, (d) Work stoppage of the CB's connected equipment due to the accidental activation. Facility.

When the restoration is completed, the detection means 3 starts making a judgment. In making this judgment, first, the equipment to which the indicator line relay belongs (the indicator line relay and the equipment to be protected are prepared in advance in the storage unit 5).
Using this as a starting point, search the surrounding switches and equipment one after the other, and restore the equipment until you find the trip CB. Assume that equipment L ₁ has an accident and PW ₁ is activated, CB ₁ , CB ₃ , and CB ₅ trip, and CB ₇ and CB ₈ have been opened before the accident. Based on the above information, it is determined that the equipment range surrounded by the CB to be tripped is the power outage equipment. Additionally, we confirmed that the protective relay operated according to the CB trip order and determined that the equipment was in trouble.

Here, if the operation according to the CB trip order is not confirmed, it is displayed as an error.

When the above judgment is completed, the trip information of CBs is input to CB ₁ and CB ₃ , CB ₇ and CB ₈ are opened from before the accident, and the equipment of G ₂ and B ₆ is the work stop equipment. As a result, it is determined that L ₁ , L ₃ , PT ₁ , and PT ₃ are the power outage facilities, which are input into the storage means 4, and the operation of the detection means 3 is completed.

The storage means 4 outputs the power outage equipment determined by the detection means 3 to the display section 6.

The display section 6 inputs information from the storage means 4 and displays the name of the power outage facility.

As described above, according to the present invention, without checking all the equipment included in the system for the presence of a power outage,
Since only the equipment that is likely to experience a power outage is investigated starting from the equipment to which the trip switch, disconnector, and indicator line relay belong, it is possible to quickly determine which equipment is experiencing a power outage. Also,
This has excellent effects such as being able to accurately determine which equipment is out of power because equipment that is unlikely to experience a power outage will not be erroneously determined to be out of power.

[Brief explanation of the drawing]

FIG. 1 is a system diagram for explaining the present invention, and FIG. 2 is a block diagram showing an embodiment of the present invention. 1... Online information input section, 2... Processing section, 3...
power outage equipment detection means, 4... storage means, 5... storage section,
6...Display section.

Claims (1)

[Scope of Claims] 1. In a power system configured by separately connecting power plants to the ends of power transmission lines and providing display line relays on the power transmission lines, information in which operation information of the display line relays of the power system is input. an input section; trip order information for determining in advance which bridge or disconnector to trip when the display line relay of the power system operates; and work stoppage equipment information among the connected facilities of the disconnector due to an accident operation; a storage unit storing information; and information input to the information input unit is supplied;
When detecting power outage equipment in the power system in the event of a power system fault using the stored information in the storage unit, the equipment to which the display line relay of the power system belongs is used as a starting point, and surrounding switches and equipment are sequentially tripped outward. The search is continued until a trip or disconnection is found, and the equipment surrounded by the trip or disconnector and the disconnector that was already in the open state before the accident and should be tripped is determined to be power outage equipment. means, storage means for storing information detected by the detection means,
An automatic judgment method for power outage equipment, characterized in that the storage means is supplied with the obtained output, and further comprises a display unit displaying the name of the power outage equipment.