JPH1070854A - Distribution control for receiving and distributing facilities - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide distribution control for receiving and distributing facilities which can conduct prompt power feed into a related receiving point by an emergency generator in the case of receiving power failure. SOLUTION: A plurality of load facilities positioned along a line are classified and a substation is installed for each classification. An emergency generator is installed at one or more positions in the substation. The generator is started in case of receiving power failure to feed power to the emergency circuit of a related receiving point. At that time, a computer is used for monitoring continuously whether any receiving power failure occurs and discriminating whether power feed is available, distribution control by the emergency generator is started automatically by the computer in case of receiving power failure (S1 to S33). The discriminating condition for discriminating whether power feed is available is registered previously in the computer. The discriminating condition may be changed. When the power feed condition is not met, automatic control is conducted by the computer so as to meet the condition. The restoration control of respective receiving points is conducted automatically by the computer in a preset order, provided that the discriminating condition is met and the voltage of the generator is established.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a power distribution control method for power receiving and distribution equipment installed along a railway or a road, and more particularly to an automatic power distribution control method when an emergency generator is operating.

[0002]

2. Description of the Related Art In an electric railway, for example, substations are installed at a plurality of locations along a track to receive power from a commercial power supply system. In this case, emergency generators are installed at one or more locations in preparation for a power outage. When all of the substations receive a power failure, the emergency generator is automatically started, and power is supplied to the emergency line of the related substation (substation) by manual control of an operator.

[0003]

When an operator recognizes a power outage of all power receiving stations and supplies power to the related power receiving stations from the generator, the operator determines the state of the circuit breaker at each power receiving station and then installs the generator. It takes time to restore all power receiving stations because the power supply circuit breaker, communication circuit breaker, and so on are controlled sequentially from the substations that have been set up.

[0004] The present invention has been made in view of the above circumstances, and the power supply to the related power receiving station by the emergency generator at the time of the power outage is carried out by monitoring the power outage and controlling the power distribution by the emergency generator by the computer. An object of the present invention is to provide a power distribution control method for power receiving and distribution equipment that can be performed quickly.

[0005]

SUMMARY OF THE INVENTION The present invention relates to a power distribution control system for a power receiving and distribution facility in which a plurality of substations are installed along a railway or a road, and an emergency generator is installed at one or more of the substations. In this system, a computer monitors power outages at multiple substations at all times, and when a power outage occurs at all substations, the function of distributing power by the emergency generator using a computer and the power supply by the emergency generator are provided. A function for automatically registering a condition for determining whether the condition is possible or not and registering the condition in advance in a computer in a state where the condition can be changed, and when the power supply condition is not satisfied, a function of automatically controlling the computer so that the condition is satisfied, And a function of automatically controlling the restoration of each power receiving station by a computer in accordance with a preset order on condition that the voltage is established.

[0006]

1 to 6 show one embodiment of the present invention. FIG. 1 is an emergency generator distribution automatic control flow diagram, FIG. 2 is a single-line connection diagram of a high-voltage distribution system, and FIGS. 3 to 6 are logic diagrams showing start conditions and end conditions.

The embodiment is applied to an electric railway. As shown in FIG. 2, a high voltage of two lines (only one line for facility a) is connected between substations (receiving stations) A to D and load facilities a to n. It constitutes a distribution system. Sectional switches T1, T2 are provided on the connecting buses of the facilities c, g, j to set the sub-areas of the substations A to D. The segment switches T1, T2 are normally in the "open" state. Substations B and C have emergency generators G installed. In other words, it is prepared for a power outage (power reception outage) of the commercial power supply system. The load facility a is a garage, the load facilities b to n are stations, the facilities a to f are B substation distribution systems, and the facilities g to n are C substation distribution systems. Power supply switchgears (circuit breakers and disconnectors) 1S and 2S are installed in the facilities b to n.

In the present embodiment, a computer is used for power distribution control until restoration of all power receiving stations of the power receiving and distribution equipment, and automation and time are reduced. 1) In order to recognize the power outage, the power outage of each of the substations A to D is constantly monitored by a computer, and when the power outage of all the substations occurs, the power distribution control by the emergency generator G is automatically performed by the computer. 2) The condition for determining whether or not power supply by the emergency generator G is possible can be registered in a computer in advance. 3) The above-described determination condition can be changed. 4) If the power supply condition is not satisfied, the condition 5) Carry out automatic control of recovery of each power receiving station by a computer according to a preset order, provided that the determination conditions are satisfied and the voltage of the emergency generator G is established. And other functions.

Next, an emergency generator distribution control flow will be described with reference to FIG. When a power failure occurs (step S1), it is determined whether or not the activation condition is satisfied (S1).
2). At the same time, the generator board H of the substation is notified of the power outage. When the start condition is satisfied, the processing of the start message, the segment switch control, and the load limit 1 and 3 commands (see Table 1 described later) is performed (S3), and when the condition is not satisfied, the determination is made again. After processing such as a start message, it is determined whether or not the TG power distribution (power supply by the generator) condition is satisfied (S4). If the TG power distribution condition is satisfied, it is determined whether or not the TG power distribution is to be executed (S5). When the TG power distribution condition is not satisfied, a retry is performed, or when a time-out occurs, abnormal termination (S6). When the TG power distribution execution is determined to be retry, the process returns to the processing of the start message in step 3, and when the TG power distribution is to be stopped, the process is terminated (S7). When the determination is GO, TG power distribution is executed (S8), and a command is issued to the remote control unit R of the substation. Here, when the preparation for starting the hardware sequence is OK (S31), the generator starting circuit breaker 52TG of the substation 52TG "ON" control is performed on condition that the generator is started in the generator panel H (S21) and the voltage is established (S22). (S32), and then execute the “ON” control of the high-voltage distribution circuit breaker 52L1 of the substation.

After execution of the above control, it is determined whether or not there is TG distribution response (S9). If No, the process returns to the determination as to whether or not TG distribution is to be executed (S5). If Yes, the sequential switch control is performed sequentially (S10), and then it is determined whether or not to end (S1).
1). If No, the process returns to the previous step (S10), and if the segment switch control fails, the process ends abnormally (S6). At the end of the sequential control of the sequential switches (at the time of Yes), it is determined whether or not the end condition is satisfied (S12).
If the determination is Yes, the process ends normally (S13). After each end processing (S6, S7, S13), it is determined whether or not the power restoration condition is satisfied (S14). If No, the same determination is repeated.
If Yes, the process returns to step S2 to determine whether the activation condition has been satisfied.

The emergency generator distribution automatic control start condition (step S2) is a logical condition shown in FIG. 3, and the start condition is satisfied when the AND condition is satisfied. That is, the voltage relays (84VR1 and 84VR2) of the substation A detect no voltage.
The substation voltage relay (84VR1 and 84VR2) detects no voltage, and the substation voltage relay (84VR1
And 84VR2) detect no voltage, and the substations A to D, where the voltage relay (84VR) of the D substation detects no voltage.
The activation condition is satisfied when the condition that each of the remote control devices is normal is satisfied.

The TG distribution start condition (step 4) is shown in FIG.
And the condition is satisfied when the AND condition is satisfied. That is, the voltage relays of the A substation (84 VR1 and 84
VR2) detects no voltage, B substation voltage relays (84VR1 and 84VR2) detect no voltage, C
The substation voltage relays (84VR1 and 84VR2) detect no-voltage, the D substation voltage relay (84VR) detects no-voltage, and the load switches c and g have separate switchgears (breakers) T1 and T2. The condition is satisfied when the condition of “off” state is satisfied.

The TG distribution termination condition (step 12) is a logical condition shown in FIG. 5, and the condition is satisfied when the AND condition is satisfied. That is, the voltage relay (84VR1 and 8VR) of the substation A
4VR2) detects no voltage, B substation voltage relays (84VR1 and 84VR2) detect no voltage, C
The substation voltage relays (84VR1 and 84VR2) detect no voltage, the D substation voltage relay (84VR) detects no voltage, and the switchgear (breaker) of the load facility c.
T1 is in the "ON" state, the segmented switchgear (breaker) T2 of the load facility c is in the "OFF" state, and the segmented switchgear (breaker) T1, T2 of the load facility g is in the "OFF" state. The condition is satisfied when the condition that the remote control devices of the substations A and B are normal is satisfied.

The power recovery condition (step 14) is a logical condition shown in FIG. 6, and the condition is satisfied when the OR condition is satisfied. That is, the voltage relays of the A substation (84VR1 and 84VR1)
2) Detects voltage, voltage substation at B substation (84V
R1 and 84VR2) detect the voltage, C substation voltage relays (84VR1 and 84VR2) detect the voltage, and D substation voltage relay (84VR) detect the voltage. It is assumed to be established.

Table 1 shows the items of the switchgear control and load limit control (Steps 3 and 4), Table 2 shows the items of the TG distribution response (Step 9), and Table 2 shows the switchgear control items (Step S1).
0) is shown in Table 3.

[0016]

[Table 1]

[0017]

[Table 2]

[0018]

[Table 3]

With the above automatic power distribution control, facilities c and j
Is in the "closed" state (the sectional switches T1 and T2 of the facility g are both in the "open" state), the B substation distribution system is to the generator G of the B substation, and the C substation distribution system. Are connected by the generator G of the substation C,
Power is supplied to n predetermined loads.

[0020]

As described above, according to the present invention, the use of a computer for monitoring a power failure and determining whether or not power supply is possible can save labor and time for confirmation and checking by an operator. Also, when the power supply is not possible, the computer automatically controls the power supply to be automatically enabled, or the computer automatically performs the power supply control on condition that the judgment condition is satisfied and the voltage of the generator is established. It will be possible to significantly reduce the time required for recovery. Further, there is an advantage that the operation becomes accurate by automatically performing the recovery operation by the computer according to a predetermined recovery procedure.

[Brief description of the drawings]

FIG. 1 is an emergency generator power distribution automatic control flow chart showing one embodiment of the present invention.

FIG. 2 is a single-wire connection diagram illustrating a configuration of a high-voltage distribution system according to an embodiment.

FIG. 3 is a logic diagram showing a start condition of the emergency power distribution automatic control according to the embodiment.

FIG. 4 is a logic diagram showing a TG power distribution start condition in one embodiment.

FIG. 5 is a logic diagram showing a TG power distribution end condition in one embodiment.

FIG. 6 is a logic diagram showing a power restoration condition in one embodiment.

[Explanation of symbols]

A to D: Substations a to n: Load facilities (garages and stations) G: Emergency generators T1, T2: Sectional switches 1S, 2S: Power supply switchgear S1 to S14: Emergency generator distribution automatic control flow Steps S21, S22: Steps of the emergency generator distribution automatic control flow (generator panel) S31 to S33: Steps of the emergency generator distribution automatic control flow (remote control device)

Claims (1)

[Claims] Claims: 1. A power distribution control system for a power receiving and distribution facility in which a plurality of substations are installed along a railway or a road, and an emergency generator is installed at one or more of the substations. Power outages are constantly monitored by computer,
When a power outage occurs at all substations, a function to distribute power using the emergency generator using a computer, and to the computer beforehand in a state where it is possible to change the conditions for determining whether power supply from the emergency generator is possible. Register, if the power supply condition is not satisfied, a function to perform automatic control by a computer so as to meet the condition, and the condition that the judgment condition is satisfied and the voltage of the emergency generator is established, and for each power receiving station according to a preset order, A power distribution control method for power receiving and distribution equipment, comprising a function of automatically controlling restoration by a computer.