JPS5986429A - Method of controlling power feeding load group - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed Description of the Invention] [Technical Field of the Invention] The present invention provides a control method for a group of loads to which electricity is supplied, in which the form of supply of commercial gravity, private whistle, and force is adjusted in accordance with the size of the load in a general consumer. Regarding.

[Technical background of the invention]

A conventional power distribution system is shown in Figure 1.

1 to 3 are transformers connected to the open power supply; 4 is a generator that generates private central power; 5 to 14 are circuit breakers that turn on and off the supply bus; 15 to 20 are lead parts; The load group 21 that receives power is a load control device that operates a circuit breaker to adjust the load group to which power is supplied.

Conventionally, in a power distribution system as shown in Figure 1, each load group 15
20.] In the case of 1).

Depending on the size of each load group, select one of the five patterns shown in Figure 2 (○ indicates the disconnected state and A pattern was selected and operated in which power generation mode 4 was used to supply the group and other load groups.

For example, suppose that all the load groups 15 to 20 in the nosoturn 101 are covered by the open power.

Here, if the contracted power is exceeded due to load fluctuations, by moving the pattern from 101 to 102, the load 1f1s and 190 will be covered by the power source 4, and the contract power will be exceeded. Excess was prevented.

[Problems with background technology]

However, during this pattern transition, that is, late [the circuit breaker 14 is turned on from power purchase to 0 urine lightning 1, and then circuit breaker 1
3 is disconnected, and the circuit breaker 12 is closed synchronously.
Furthermore, if the circuit breaker 11 is turned off and the circuit breaker becomes jammed in the middle of the operation due to ρ while it is being operated, the circuit breaker will be out of the ξ turn (registered) and the recovery will be impossible. The circuit breaker was turned on and off manually to return to the registered pattern.

For this reason, there was a problem in that it was not possible to synchronize the power purchase and in-house power generation, and the load had to be temporarily stopped.

[Purpose of the invention]

Here, the present invention overcomes the pointlessness of the conventional device and provides a breaker on/off operation table for the registered no-turn when it is out of the registered A turn, and uses that table to return to the registered no-set turn. It is an object of the present invention to provide a method for controlling a group of power supply loads without stopping the loads.

[T formation of invention]

The present invention connects and separates a plurality of transformers that supply open power to the valley load group, a generator that supplies power to the load group for private use, and the bus bar of each load group. A plurality of circuit breakers, a power supply load group control device that inputs important states of the circuit breakers and power supply states of the loads, and adjusts the power of supplying power to the trough load group, and this power supply load group control. Equipped with an operator's console to set control command values to the device, the power supply status is Registration II? If the important pattern of the circuit breaker in a turn is out of order, prepare a circuit breaker on/off operation table for the registered pattern from the unregistered pattern in advance, and purchase the unregistered pattern from the unregistered pattern. The power supply load group is limited to the e-turn, and the circuit breaker operation is selected so that the power supply will not be interrupted and the load group will not experience a power outage, and the power supply load group will return to the registered pattern. This is a control method.

[Embodiments of the invention]

FIG. 3 is a block diagram showing the r4 configuration of one embodiment of the present invention.

A power supply load control device 21 that inputs the status of each circuit breaker 8 to 14, the magnitude of the load of load groups 15 to 2o, and a voltage signal for synchronized closing, and provides an input command to the circuit breaker, and an operator that provides set values to the circuit breaker. It consists of a console 22.

Next, I will explain its effect.

In Fig. 2, when attempting to shift from turn 101 to turn 102, first check the power purchase capacity of the circuit breaker 14, the power supply on the private power generation side, and the voltage 9 frequency 2 phase.

The circuit breaker 13 is closed at synchronous timing, and then a disconnection command is given to the circuit breaker 13 to shut it off. Then, synchronously close circuit breaker 12 to shut off circuit breaker 11, and turn 101 to 10.
We will move on to 2.

At this point, although the operation to turn off circuit breaker ■3 was performed normally,
If the synchronization of the circuit breaker 12 cannot be performed and a transition jam occurs, the system will be out of registration and lean, and the transition will not be possible with a normal circuit breaker ON/OFF operation command.

In this state, by the ξ turn transition command, e turn 103
When given from the operator's console 22, circuit breaker 1
3 is applied to the same JiQ, circuit breaker 8 is shut off, and a transition to pattern 3 is made.

To explain this series of operations, the pattern transition during normal operation is as shown in the flowchart of FIG.

First, compare the contracted power level with the current power usage (step 402). If it is predicted that there will be more than 50% if the current power usage continues as it is (step 403) request power (step 404)
, when there is enough power even after load migration (
Step 405), the circuit breaker is taken care of according to the pre-registered circuit breaker on/off A turn shown in Fig. 5 (step 40).
6-410).

At this point, if the circuit breaker 12 cannot be synchronized and the control wave becomes 1, it will no longer enter the self-type nosoturn of the power feeding shown in Fig. 2, and therefore the interruption shown in Fig. 5 will occur. The equipment's important operation table will no longer be able to handle the situation.

Therefore, in the present invention, as shown in FIG.
A circuit breaker on/off operation table from the turn to the registered turn -\ is prepared, and the return to the M record ξ turn is performed using that table.

However, the number of unregistered patterns in this embodiment is 2 −
25 = 9997 turns, and the circuit breaker operation procedure is 999 x 25 224,975 ways. If we keep this in the table as it is, it is preferable in terms of memory efficiency, so the unregistered number turn is supplied either from the electricity purchase side or from the Jizuka source 1w <tt++. For circuit breaker operation, power supply,
The circuit breaker operation is selected in such a way that load groups 15 to m will not experience a power outage due to the loss of power.

In this way, even from unregistered ・ξ turns, load group 1
The chisel turn can be restored without stopping the plants 5 to 20, and fluctuations in the operating state of the plant can be suppressed.

〔Effect of the invention〕

Thus, according to the present invention, it is possible to avoid a situation where a load group is stopped in an actual plant.
Compared to returning to the turn, this is a huge advantage in terms of maintaining the state of the plant.

[Brief explanation of drawings]

Figure 1 is a block diagram of a conventional device with a 7J It is a chisol diagram of the circuit breaker on/off operation from a non-registered turn to a registered no-turn. 1-3...Transformer, 4...Start, 5-14.
...A circuit breaker. J5-20...Load lid, 21...Load flj
1.22 Operator's console,
210...Supply R°C load group control device. Applicant's agent Kiyoshi Inomata No. 2 Oni No. 3 Accent 5 reasons

Claims (1)

[Claims] 1. A number of transformers that supply commercial power to each load group;
A generator that supplies power to load groups for private use, multiple circuit breakers that connect and disconnect each load group to the bus, and important statuses of these circuit breakers and power supply status of the loads are input to each load. a power supply load group control device that adjusts power supplied to the group;
This power supply load group control device is equipped with an operator's console for setting control command values, and when the power supply state is turned off or on or off at a registered turn, a registered pattern is set in advance from an unregistered/ξ turn. In addition to preparing a circuit breaker on/off operation table, the unregistered number turns are limited to those that are supplied with power by either the purchaser or the private power generator, and the circuit breaker operation is performed when there is no power supply. A power supply load group control method characterized in that a circuit breaker operation is selected so that the load group does not experience a power outage, and a return to a registered pattern is performed.